СИСТЕМА И СПОСОБ ПРЕДВАРИТЕЛЬНОГО ЭКСТРАГИРОВАНИЯ ГЕМИЦЕЛЛЮЛОЗЫ ЗА СЧЕТ ИСПОЛЬЗОВАНИЯ ПРОЦЕССА НЕПРЕРЫВНОГО ПРЕДГИДРОЛИЗА И ПРОЦЕССА ПРЕДВАРИТЕЛЬНОЙ ОБРАБОТКИ ПАРОВЫМ ВЗРЫВОМ

Создан комплекс оборудования для предварительной обработки перерабатываемого сырья в виде целлюлозной биомассы, содержащий: первый реактор, действующий под давлением, в который подают перерабатываемое сырье и в котором перерабатываемое сырье подвергают гидролизу; герметизирующее устройство, содержащее первое соединение, действующее под давлением, соединенное с выпускным отверстием для выпуска перерабатываемого сырья первого реактора, действующего под давлением, и второе соединение, действующее под давлением, соединенное со вторым реактором, действующим под давлением; слив для слива жидкости, содержащей растворенную гемицеллюлозу, экстрагированную из перерабатываемого сырья, по меньшей мере, в одном из устройств: первом реакторе, действующем под давлением, и герметизирующем устройстве; агрегат, содержащий второй реактор, действующий под давлением, в который подают перерабатываемое сырье, находящееся под давлением, из герметизирующего устройства под давлением, значительно более высоким, чем ...

УСТРОЙСТВО И СПОСОБ ДЕГАЗАЦИИ НАСОСА

Изобретение относится к устройству и способу управления потоком газа, отделенного от суспензии целлюлозы средней консистенции. Способ управления потоком газа, отделенного от суспензии целлюлозы средней консистенции, которую обрабатывают в устройстве для обработки целлюлозы таким образом, чтобы она перекачивалась посредством по меньшей мере первого насоса и второго насоса для повышения давления целлюлозы, газ отделяют от целлюлозы во втором насосе, при этом отделенный поток газа выпускают в дегазационный канал, разность давлений определяют между входом второго насоса и дегазационным каналом, а величину разности давлений поддерживают в заданном диапазоне посредством дегазационного клапана, соединенного с дегазационным каналом, отделенный газ подают в дегазационную емкость под давлением, расположенную ниже по потоку от дегазационного клапана и соединенную с дегазационным трубопроводом, избыточное давление в дегазационной емкости под давлением поддерживается посредством клапана регулирования ...

УСТРОЙСТВО И СПОСОБ ОТДЕЛЕНИЯ ВРЕДНЫХ ВЕЩЕСТВ В ПРОЦЕССЕ ПРОИЗВОДСТВА ЦЕЛЛЮЛОЗЫ

Настоящее изобретение относится к устройству и способу отделения вредных веществ, особенно песка, из жидкого потока или волокнистой суспензии низкой концентрации в процессе производства целлюлозы. Устройство содержит сепаратор циклонного типа, содержащий вертикальную камеру, в верхней части которой имеется тангенциальный вход для создания вихревого движения очищаемого потока, а также приемный выход, при этом коническая нижняя часть упомянутого сепаратора снабжена отбраковочным выходом. Устройство содержит два или более сепараторов (301) циклонного типа, которые соединены параллельно, в результате чего их входы выходят по меньшей мере на один питающий канал (310), имеющий по меньшей мере один вход, а их приемный выход выходит на общий выпускной канал (313), имеющий по меньшей мере один выход, тогда их отбраковочные выходы выходят на общий выпускной канал, имеющий по меньшей мере один выход, который соединен по меньшей мере с одним вспомогательным сепаратором (316), имеющим трубопроводы ( ...

СИСТЕМА И СПОСОБ ПРЕДВАРИТЕЛЬНОГО ЭКСТРАГИРОВАНИЯ ГЕМИЦЕЛЛЮЛОЗЫ ЗА СЧЕТ ИСПОЛЬЗОВАНИЯ ПРОЦЕССА НЕПРЕРЫВНОГО ПРЕДГИДРОЛИЗА И ПРОЦЕССА ПРЕДВАРИТЕЛЬНОЙ ОБРАБОТКИ ПАРОВЫМ ВЗРЫВОМ

Изобретение относится к комплексу оборудования для предварительной обработки перерабатываемого сырья в виде целлюлозной биомассы, содержащему: первый реактор, действующий под давлением, в который подают перерабатываемое сырье и в котором перерабатываемое сырье подвергают гидролизу, герметизирующее устройство, содержащее первое соединение, действующее под давлением, соединенное с выпускным отверстием для выпуска перерабатываемого сырья первого реактора, и второе соединение, действующее под давлением, соединенное со вторым реактором, действующим под давлением, слив для жидкости, содержащей растворенную гемицеллюлозу. Система также содержит второй реакторный узел, действующий под давлением, в который подают перерабатываемое сырье, находящееся под давлением, из герметизирующего устройства под давлением, значительно более высоким, чем давление в первом реакторе, и расширительное устройство, расположенное ниже по потоку от второго реакторного узла, действующего под давлением, причем расширительное ...

ВЫСОКОТЕМПЕРАТУРНЫЙ СПОСОБ ОТДЕЛЕНИЯ ЛИГНИНА

Высокотемпературный способ отделения лигнина применяется при конверсии целлюлозы и сахаров из биомассы в другие органические соединения. Способ отделения лигнина от водной смеси, имеющей значение pH больше 3,5, включает стадии: a) нагревания смеси до температуры больше, чем критическая температура, в диапазоне от 45С до 98С, b) отделения твердого вещества лигнина от смеси при температуре отделения, которая равна критической температуре или превышает ее. Смесь получают из исходного сырья на основе биомассы, а стадии нагревания смеси предшествует стадия обработки водяным паром, проводимая для исходного сырья на основе биомассы. Обеспечивается эффективное отделение лигнина от водной смеси, полученной в ходе способа конверсии биомассы в спирт. 11 з.п. ф-лы, 5 табл.

СИСТЕМА ПОДАЧИ, ВКЛЮЧАЮЩАЯ НАСОСЫ В ПАРАЛЛЕЛЬНОЙ КОМПОНОВКЕ, ДЛЯ ВАРОЧНОГО КОТЛА НЕПРЕРЫВНОГО ДЕЙСТВИЯ

Изобретение относится к системе подачи для варочного котла непрерывного действия, где по меньшей мере 2 насоса размещены в параллельной компоновке в донной части резервуара для предварительной обработки и устанавливают уровень жидкости по меньшей мере порядка метров. Изобретение делает возможным создание системы подачи с улучшенной доступностью и эксплуатационной надежностью и с возможностью работы основной части насосов с оптимальным коэффициентом полезного действия, даже если производственная мощность снижается. 8 з.п. ф-лы, 13 ил., 1 табл.

УСТАНОВКА И СПОСОБ ПЕРЕРАБОТКИ ВОЛОКНИСТЫХ МАТЕРИАЛОВ

Для рекуперации пара при переработке волокнистых материалов, во время которой перерабатываемое сырье, например древесную щепу, последовательно подают в предварительный пропариватель (1), варочный котел (4), рафинер (9) и по продувному трубопроводу (6) в сушильную камеру (7), из пароволокнистой смеси после рафинера (9) и перед сушильной камерой (7) осуществляют непрерывный отбор пара, и отобранный пар направляют в предварительный пропариватель (1) и/или в варочный котел (4). 2 н. и 9 з.п. ф-лы, 1 ил.

СПОСОБ НЕПРЕРЫВНОЙ СУЛЬФАТНОЙ ВАРКИ ИЗМЕЛЬЧЕННОГО ЦЕЛЛЮЛОЗНОГО ВОЛОКНИСТОГО МАТЕРИАЛА И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

Изобретение относится к способу непрерывной сульфатной варки измельченного целлюлозного волокнистого материала и устройства для его осуществления и предназначено к использованию в целлюлозно-бумажной промышленности. Сущность изобретения состоит в том, что способ включает подачу измельченного целлюлозного волокнистого материала в сульфатном белом щелоке в верхнюю секцию варочного потока, экстрагирование черного щелока из по меньшей мере одного пояса между верхней и центральной секциями варочного котла, отвод и рециркуляцию жидкости в контуре рециркуляции в центральной секции котла, добавление промывочной жидкости в нижней секции котла и отвод крафт-целлюлозы из нижней секции. При этом жидкость отводят из нижней секции и рециркулируют ее в промывочном контуре рециркуляции с добавлением сульфатного белого щелока. Осуществляют поднятие рециркулированного щелока в котле противотоком относительно потоку материала приводится количество добавляемого сульфатного щелока и температурный режим в промывочном ...

СПОСОБ ПОЛУЧЕНИЯ ПАРА В ВАРОЧНОМ КОТЛЕ НА ЦЕЛЛЮЛОЗНО-БУМАЖНОМ ПРЕДПРИЯТИИ

... 1. Способ получения пара в варочном котле на целлюлозно-бумажном предприятии, где: ! a) черный щелок получают в системе варочного котла, !b) первый поток черного щелока удаляют из варочного котла и выпаривают, используя свежий пар в качестве теплоносителя для получения пара, требуемого в процессе варки, и выпаренный черный щелок имеет повышенное содержание сухих веществ, ! c) пар со стадии выпаривания b) используют для нагревания волокнистого материала в варочном котле, ! d) второй поток удаленного из варочного котла черного щелока подвергают мгновенному испарению с получением прошедшего мгновенное испарение черного щелока и пара мгновенного испарения, который подают, по меньшей мере, в один теплообменник, предпочтительно в котел-испаритель, для косвенного теплообменного контакта с чистой выпариваемой жидкостью с получением чистого пара, ! e) чистый пар со стадии d) используют для пропаривания щепы и ! f) прошедший мгновенное испарение черный щелок со стадии d) подают на дополнительное ...

СПОСОБ И СИСТЕМА ДЛЯ ВАРКИ ПОЛУЦЕЛЛЮЛОЗЫ

... 1. Способ ингибирования забивания экстракционного сита для черного щелока в варочной емкости для варки полуцеллюлозы, при этом способ включает в себя стадии: ! введения лигноцеллюлозного материала и зеленого щелока в варочную емкость для варки полуцеллюлозы; ! варки лигноцеллюлозного материала в варочной емкости для варки полуцеллюлозы, так, что некоторая часть лигнина или весь он отделяется от лигноцеллюлозного материала, и при этом лигнин растворяется в варочной жидкости; ! извлечения с помощью экстракционного сита черного щелока, содержащего растворенный лигнин, где черный щелок образуется во время процесса варки полуцеллюлозы, из варочной емкости; и ! добавления белого щелока или основания в варочную емкость на экстракционное сито или вблизи него, так что pH на экстракционном сите или вблизи него поднимается и ингибирует прилипание лигнина к экстракционному ситу. ! 2. Способ по п.1, в котором стадия добавления белого щелока или основания включает в себя добавление белого щелока и основания ...

СПОСОБ И СИСТЕМА ДЛЯ ПРЯМОГО КОНТАКТА ГОРЯЧЕГО ЩЕЛОЧНОГО РАСТВОРА С ДРЕВЕСНОЙ ЩЕПОЙ ПРИ ЦИРКУЛЯЦИОННОМ ПЕРЕНОСЕ

... 1. Способ нагрева взвеси щепы в системе щелочной варки, содержащей пропиточный котел и котел химической варки, при котором: ! пропитывают щепу щелоком в пропиточном котле; ! транспортируют щепу из пропиточного котла на верхний уровень варочного котла; ! извлекают щелок с нижнего уровня варочного котла, где извлеченный щелок имеет температуру, существенно превышающую температуру щепы в пропиточном котле; ! добавляют щелок, извлеченный с нижнего уровня варочного котла в щепу, подлежащую транспортировке или транспортируемую из пропиточного котла в варочный котел, и нагревают транспортируемую щепу тепловой энергией извлеченного щелока. ! 2. Способ по п.1, где температура щепы во время транспортировки не превышает 120°С, а температура щелока, извлеченного с нижнего уровня варочного котла, составляет по меньшей мере 130°С. ! 3. Способ по п.1, где варочный котел является котлом непрерывной варки, и в варочный котел транспортируют непрерывный поток щепы. ! 4. Способ по п.1, где щепу транспортируют ...

СИСТЕМА ПОДАЧИ, ВКЛЮЧАЮЩАЯ НАСОСЫ В ПАРАЛЛЕЛЬНОЙ КОМПОНОВКЕ, ДЛЯ ВАРОЧНОГО КОТЛА НЕПРЕРЫВНОГО ДЕЙСТВИЯ

... 1. Система подачи для варочного котла (6) непрерывного действия, где древесную щепу непрерывно подают в верхнюю часть варочного котла и выводят из донной части варочного котла, отличающаяся тем, что древесную щепу, которая должна быть подана в верхнюю часть варочного котла, суспендируют в резервуаре (3) для создания щеповой суспензии, по меньшей мере два насоса (12а, 12b) подсоединены в параллельной компоновке к донной части резервуара, где каждый насос нагнетает щеповую суспензию через первую секцию (13а, 13b) транспортного трубопровода в верхнюю часть варочного котла, и первые секции транспортных трубопроводов по меньшей мере от 2 насосов объединены в точке (16) слияния с образованием объединенной второй секции (13ab) транспортного трубопровода перед тем, как эта вторая секция направляется к верхней части варочного котла, и что к точке (16) слияния подсоединен трубопровод (15) для разбавителя. ! 2. Система подачи по п.1, отличающаяся тем, что по меньшей мере три насоса (12а, 12b, 12с) ...

ПРОПИТОЧНАЯ КАМЕРА С РЕЛЬЕФНЫМ СУЖЕНИЕМ (ВАРИАНТЫ) И СПОСОБ НАГРЕВАНИЯ ЦЕЛЛЮЛОЗНОГО МАТЕРИАЛА В НЕЙ

... 1. Пропиточная камера, содержащая: ! резервуар камеры, включающий верхний впускной патрубок для принятия целлюлозного материала; ! нижний выпускной канал для выгрузки целлюлозного материала из разгрузочной секции резервуара камеры; ! секцию сужающегося профиля внутри камеры, через которую проходит поток целлюлозного материала в камере; ! полость между внутренней стенкой камеры и секцией сужающегося профиля, в которой полость имеет нижнее отверстие в сторону целлюлозного материала в камере и верхнюю секцию, отгороженную от потока целлюлозного материала в камере, и ! впускной канал в камере и отверстие в полость, в которой впускной канал выполнен с возможностью соединения с источником горячей жидкости, добавляемой к целлюлозному материалу в камере. ! 2. Пропиточная камера по п.1, в которой секция сужающегося профиля выполнена сужающейся в одном направлении внутри камеры. ! 3. Пропиточная камера по п.1, в которой секция сужающегося профиля выполнена сужающейся в ортогональных направлениях ...

ИНТЕГРИРОВАННЫЕ СПОСОБ И СИСТЕМА ДЛЯ ПЕРЕРАБОТКИ ОТХОДОВ

УСТРОЙСТВО ДЛЯ СЕПАРАЦИИ ТВЕРДЫХ ЧАСТИЦ/ТЕКУЧЕЙ СРЕДЫ И СПОСОБ ОБРАБОТКИ БИОМАССЫ, ВКЛЮЧАЮЩИЙ СЕПАРАЦИЮ ТВЕРДЫХ ЧАСТИЦ/ТЕКУЧЕЙ СРЕДЫ

... 1. Сепарационный модуль для сепарации твердых частиц/текучей среды для сепарации массы текучей среды, находящейся под давлением и содержащей твердые частицы, содержащий:сборную выдерживающую давление камеру и по меньшей мере один фильтрующий узел для отделения текучей среды от массы, находящейся под давлением, и направления текучей среды в сборную камеру;фильтрующий узел, образующий центральное отверстие, герметично изолированное от сборной камеры, для размещения массы, находящейся под давлением, и содержащий фильтровальный пакет, состоящий из фильтровальной пластины, содержащей сквозную прорезь фильтра, проходящую от центрального отверстия в фильтровальную пластину для направления текучей среды от центрального отверстия, и опорную пластину для направления текучей среды, собранной в прорези фильтра, в сборную камеру.2. Сепарационный модуль по п.1, отличающийся тем, что фильтровальная пластина содержит множество прорезей фильтра.3. Сепарационный модуль по п.1, отличающийся тем, что фильтрующий ...

ПРОТОЧНОЕ СИТО С ПРОФИЛИРОВАННЫМИ ПРОСЕИВАЮЩИМИ ЩЕЛЯМИ

... 1. Сепаратор жидкости для отвода жидкости из движущегося потока жидкой массы черного щелока, содержащий:цилиндрический корпус, имеющий входной канал, расположенный проксимально к первому концу цилиндрического корпуса, первый выходной канал, расположенный проксимально ко второму концу цилиндрического корпуса, второй выходной канал, расположенный проксимально к первому концу цилиндрического корпуса, а также внутреннюю камеру, расположенную между входным каналом и первым выходным каналом, при этом внутренняя камера продолжается вдоль оси цилиндрического корпуса;фильтрующую корзину, установленную во внутренней камере цилиндрического корпуса, при этом фильтрующая корзина образована пластиной, имеющей боковые кромки, которые соединены для образования проточной камеры для потока жидкой массы черного щелока, при этом входной канал и первый выходной канал цилиндрического корпуса сообщаются по текучей среде с проточной камерой для потока жидкой массы черного щелока;камеру для сбора жидкости, образованную ...

УСОВЕРШЕНСТВОВАНИЯ СПОСОБА БЫСТРОГО КИСЛОТНОГО ГИДРОЛИЗА ЛИГНОЦЕЛЛЮЛОЗНОГО МАТЕРИАЛА И РЕАКТОРА ГИДРОЛИЗА

... 1. Усовершенствованный способ быстрого кислотного гидролиза лигноцеллюлозного материала такого типа, который содержит целлюлозную часть и лигнинную часть, включающий следующие стадии: ! (а) непрерывная подача в верхнюю часть реактора (10) однородного потока предварительно нагретого и измельченного лигноцеллюлозного материала; ! (b) осуществление контакта указанного лигноцеллюлозного материала на различных уровнях реактора (10) с множеством потоков системы гидросольвента, содержащей большую часть органического растворителя лигнина и воды и меньшую часть чрезвычайно разбавленного раствора сильной неорганической кислоты, так, чтобы одновременно растворялся лигнин и реагировал целлюлозный материал, с получением жидкой фазы в виде гидролизной вытяжки, содержащей реакционные продукты целлюлозной части и раствор лигнина, и твердой фазы, содержащей непрореагировавший и нерастворенный материал; и ! (с) удерживание указанной твердой фазы таким образом, чтобы обеспечить ее осаждение на дно реактора ...

СПОСОБ И СИСТЕМА ВВЕДЕНИЯ ТЕХНОЛОГИЧЕСКОЙ ЖИДКОСТИ С ЭТАПА ОБРАБОТКИ В МОЮЩЕЕ И/ИЛИ ФИЛЬТРУЮЩЕЕ УСТРОЙСТВО

СПОСОБ И УСТРОЙСТВО ДЛЯ ПЕРЕНОСА ТЕХНОЛОГИЧЕСКОЙ ЖИДКОСТИ, ПРОМЫШЛЕННОЕ ПРЕДПРИЯТИЕ И СПОСОБ УПРОЩЕНИЯ ЕГО СХЕМЫ

... 1. Способ переноса технологической жидкости с одной технологической стадии на другую, включающий следующие стадии:- слив технологической жидкости первой консистенции из технологического устройства (10),- введение технологической жидкости в вертикальную трубу (18),- разбавление технологической жидкости до второй консистенции, т. е. до средней консистенции,- оборудование вертикальной трубы (18) устройством (24) для измерения уровня поверхности технологической жидкости в вертикальной трубе (18), причем измерительное устройство (24) имеет интервал регулирования уровня поверхности с верхним пределом (26) регулирования уровня поверхности и нижним пределом (28) регулирования уровня поверхности (28) для поддержания во время использования уровня поверхности технологической жидкости между верхним и нижним пределами регулирования уровня поверхности,- слив технологической жидкости второй консистенции из указанной вертикальной трубы (18) посредством насоса (22), установленного в гидравлическом соединении ...

СПОСОБ И АППАРАТ ДЛЯ ДОБАВЛЕНИЯ ПАРА ДЛЯ ПРОЦЕССА ПРЕДВАРИТЕЛЬНОЙ ОБРАБОТКИ ПАРОВЫМ ВЗРЫВОМ

... 1. Способ обработки сырьевого материала биомассы, который включает:подачу сырьевого материала через изолирующее давление устройство и в верхний впуск системы вертикального реакционного сосуда, где сырьевой материал располагают на столбе сырьевого материала внутри вертикального реакционного сосуда;добавление тепловой энергии для того, чтобы нагревать и повышать давление в сырьевом материале посредством введения первого объема пара в верхний участок системы вертикального реакционного сосуда;продвижение сырьевого материала через выпуск в нижнем участке системы вертикального реакционного сосуда посредством введения по меньшей мере второго объема пара в биомассу на уровне, соответствующем нижнему участку вертикального реакционного сосуда в, около или после нижнего выпуска вертикального реакционного сосуда;где введение первого объема пара и введение по меньшей мере второго объема пара вертикально разделяют посредством по меньшей мере части колонны биомассы, иперемещение продвигаемого сырьевого ...

СПОСОБ МОНИТОРИНГА И ИНГИБИРОВАНИЯ ОБРАЗОВАНИЯ ОТЛОЖЕНИЙ В ВЫПАРНЫХ АППАРАТАХ И КОНЦЕНТРАТОРАХ ЦЕЛЛЮЛОЗНОГО ЗАВОДА

... 1. Способ ингибирования образования отложений из отработанного щелока в выпарном аппарате или концентраторе целлюлозного завода, в котором отработанный щелок может иметь содержание твердых веществ примерно менее 50%, включающий: ! (a) определение уровня образования отложений в выпарном аппарате или концентраторе целлюлозного завода; ! (b) добавление к черному щелоку эффективного количества ингибирующей образование отложений композиции, если определенный уровень образования отложений выше заданного уровня; ! (c) где ингибирующая образование отложений композиция включает одно или более соединений, выбранных из группы, состоящей из монокарбоновых кислот; поликарбоновых кислот; жирных кислот; ароматических алифатических и ароматических сульфоновых кислот с низкой и высокой молекулярной массой; их сложных эфиров, ангидридов и амидов; аминов с низкой и высокой молекулярной массой, а также их сочетаний; и ! (d) возможно включающий мониторинг концентрации ингибирующей образование отложений композиции ...

Устройство для загрузки материала

KONTROLLE DER GELÖSTEN FESTSTOFFE BEI DER ZELLSTOFFHERSTELLUNG

Vorrichtung zum Entnehmen von aufgeschlossenem Fasermaterial aus einem Druckgefaess

VERFAHREN ZUM ZUFUEHREN FASERIGEN LIGNOZELLULOSE-ROHMATERIALS ZU EINEM DRUCKBEHAELTER

Screen for solids-fluid separation - has outward tapering slots produced by parallel assembly of sections or form milling

Screen for the improved sepn. of solids and liq. has slots with a tapered section and a width of 0.01-1 mm. at the narrowest point. The screen apertures are produced by a parallel assembly of trapezoidal or triangular sections or by milling tapered slots into a metal sheet. Used for sepn. of solids and liq. during the bisulphide process for cellulose prods. in an autoclave. Such a screen provides satisfactory sepn. and a uniform penetration of steam into the filter cake, resulting in an even loose structure. The autoclave contents are well impregnated by the chemicals in the fluid and the cake is uniformly freed from liq.

Verfahren und Vorrichtung zum chemischen Aufschluss cellulosehaltigen Materials

Verfahren und Vorrichtung zur Herstellung von Zellstoff

VERFAHREN ZUM SCHUTZ DER AUSTRAGSVORRICHTUNG KONTINUIERLICH ARBEITENDER ZELLSTOFFKOCHER

VERFAHREN UND VORRICHTUNG ZUR PROZESSFÜHRUNG BEI DER HERSTELLUNG VON PAPIER

Verfahren zum Fuellen von Zellstoffkochern mit erwaermter Sulfitlauge

ZELLSTOFFKOCHEN MIT HOHER SULFIDITAET, DURCH SULFONIERUNG VON GEDAEMPFTEN HOLZSPAENEN MIT SCHWARZLAUGE.

CONTINUOUS DIGESTER SYSTEM

Vorrichtung zum Austragen von lignozellulosem Rohmaterial aus einem Kocher und zur Förderung des Rohmaterials zu einem Refiner

Vorrichtung zum Austragen von lignozellulosem Rohmaterial, insbesondere Hackschnitzel, Sägespäne, Einjahrespflanzen oder Holzabfälle, aus einem Kocher und zur Förderung des lignozellulosen Rohmaterials zu einem Refiner, aufweisend: – einen Kocher (1) – einen Refiner (3) – eine den Kocher mit dem Refiner verbindende Verbindungsvorrichtung (21, 23', 24, 26) – eine in der Verbindungsvorrichtung vorgesehene Entwässerungsvorrichtung (23') zum Entwässern des aus dem Kocher (1) stammenden lignozellulosen Rohmaterials, – eine aus dem System führende Auslassleitung (27, 28) für beim Entwässern des lignozellulosen Rohmaterials anfallendes Kondensat, wobei die Entwässerungsvorrichtung (23') in Form einer durchgehenden Schnecke mit in Transportrichtung kleiner werdendem Querschnitt ausgestattet ist und am Ausgang der Entwässerungsvorrichtung (23') ein mit definiertem Anpressdruck anstellbarer, das entwässerte Rohmaterial ähnlich einem Bohrer abtragender, rotierender Schälkopf (29) angeordnet ist.

Vorrichtung zur UEbertragung von Holzschnitzeln in einem kontinuierlichen Aufschlussverfahren

Zellstoffzufuhrvorrichtung für eine Vorrichtung zum Recycling von gebrauchtem Papier

Verfahren und Vorrichtung zum Gewinnen von Holzfasern aus Holzhackschnitzeln

Digester

... 939,271. Continuous treatment digesters. BAUER BROS CO. Nov. 29, 1960 [Nov. 30, 1959], No. 41056/60. Class 64 (1). A continuous treatment digester of the moving conveyer type has means for circulating conditioning fluids relative to the fibrous material through zones in the tube shell, these zones lying beneath the surface 19 of the liquor. The digester includes a tube shell 10, a partition 16 extending longitudinally in the shell, an inlet 13 and an outlet 15 for a fibrous material for treatment, a continuous conveyer consisting of an endless chain 21 with flights 22 arranged longitudinally in the shell taking a path over the ends of the partition 16. The conveyer conducts the fibrous material from the inlet 13 to the outlet 15 in a continuous moving fashion. The central partition 16 presents upper and lower surfaces 34 and 35 respectively which, in width, correspond approximately to the internal diameter of the tube shell 10, facing upper and lower flow or flight paths 17 and 18 respectively ...

Hydrolysis systems and methods

Digestion of ligno-cellulosic materials

... 678,761. Disintegrating wood chips &c. for paper-making. PAPER & INDUSTRIAL APPLIANCES, Inc. May 11, 1950 [July 26, 1949], No. 11751/50. Class 96. Wood chips &c. fed into a hopper 11 are screw-fed to form a steam-pressure-tight plug 14 as they enter a steam treatment zone 15 in which they are softened and expanded as they are screw-fed to a vertical chamber 22 where they fall into a zone of particles agitated by an impeller 27 and are reduced by impacting against each other and against a shoulder 22a in the wall of the chamber 22, the reduced particles passing out by centrifugal force through an outlet 29 the size of which is adjusted by a handle 67 which is locked in position by a tightening handle 70. The outlet 29 which is kept clear by the impeller blades opens to a tapered passage 30 so that the steam pressure gradually falls before the particles enter a water-saturating tower and are immersed and mixed in a water-bath before entering a refiner prior to sheet-forming. Steam is supplied ...

A Method of Charging Boilers with Wood, Straw and the like Elastic Material.

... 10,548. Pokorny & Wittekind Maschinenbau - Akt.- Ges. March 14, [Convention date]. D i g e s t e r s. - In a stamping-in process for charging boilers with wood, straw, or like elastic material, the elastic after-effect of the material is overcome by stamping the material in, with such rapid blows, that the material has not sufficient time to expand again and to follow the back stroke of the stamping - tool. Pneumatic s t a m p i n g tools 1, driven by compressed air supplied through valves 9, 10, 12 may be used.

Improvements in and relating to Boilers or Digesters for Treating Material used for Paper Making Purposes and the like.

... 12,881. Milne, S. May 26. Digesters.-The rotary digester a of cylindrical, spherical, or other shape and for use in treating material for paper making &c. is fitted internally with two gratings d arranged near the ends to form spaces a<1>, a<2>, which are connected by a pipe e. A pipe f supplies steam to a nozzle for circulating the liquor from the space a<1> through the pipe e to the space a<2> and then back through the material to the space a<1> again. Steam may be supplied to both ends of the pipe e, which is then provided with an outlet opening near the centre. A pipe i supplies the liquor to a space beneath a longitudinal grating h, which is disposed opposite the charging-openings g. Baffles may be fitted in the digester. The contents of the digester are discharged into a tank k, where they are further treated by agitators m on a shaft l. The tank is preferably V-shaped with a rounded bottom, and is provided with a splashguard. The material may be removed from the tank by screws, buckets ...

METHOD OF PRODUCING CELLULOSE

... 1,221,593. Wood pulp. K. GRULL and H. THOMASSET. 1 May, 1968 [2 May, 1967], No. 20640/68. Heading D2W. [Also in Division C7] Cellulose is produced from vegetable material by a method comprising alternatingly reacting the material with alkali metal hydroxide and chlorine, both in statu nascendi, and both produced by electrolysis of the electrolyte so as to at least twice contact the material with alkali metal hydroxide or chlorine, preferably at least twice with each. The vegetable material may 'be introduced together with aqueous sodium chloride, into two communicating digesters, these digesters being connected to terminals of opposite polarity, so forming sodium hydroxide in one digester and chlorine in the other; and reversing the polarity of the electrodes at least twice. The NaCI solution is preferably free of Ca and Mg salts, and these may 'be removed by precipitation, e.g. by treatment with just sufficient Na 2 CO 3 or NaHCO 3 . The NaCI solution is preferably 10% by wt. The vegetable ...

Discharge device for finely divided fibrous material from a pressure system

... 683,916 Digesters. AMERICAN DEFIBRATOR, Inc. May 11, 1950 [May 26, 1949], No. 11789/50. Class 64 (i) Relates to devices for continuously discharging finely divided fibrous materials from a pressure system, such as the system shown in Fig. 1. According to the invention, the device comprises a casing 211, Fig. 2, having stationary liners 217a, 218a, which cooperate with spaced rotatable members 217, 218 to define a discharge passage, the rotatable members being axially adjustable with respect to the liners so as to vary the width of the passage between them. In the construction shown, wood chips fed to a hopper 12, Fig. 1, are conveyed by a screw conveyer 14 to a cylinder 16 where they are compressed and fed as a plug to a receiver 32 which is under the pressure of steam supplied at 56, 58. A conveyer 38 feeds the chips between fixed and rotating cutter discs 42, 44, and the resulting fibrous material passes through a conduit 210 to the device shown in Fig. 2. The conduit shown has a nozzle ...

Improvements in Apparatus for the Preparation of Paper Pulp.

... 5595. Rice, J. D. March 6. Digesters.-In apparatus for the preparation of paper pulp from wood, chopped wood delivered to a hopper 35 is introduced by shoots into one of two stationary boilers 10 through a man-hole 17. The material is heated by rotating steam-pipes which also stir the material, the central pipe constituting a h o l l o w shaft which is in communication with inlet and outlet ports in the walls of the boiler. When the cooking is finished, the valve 56 is opened, and the material is allowed to flow into a conveyer 11, provided with a double spiral screw, which carries the material from either boiler to a perforated shoot 65. Steam may be supplied to the bottoms of the boilers through pipes 53.

Chip Feeder Valve

... 1,173,991. Chip feeder valve. BELOIT CORP. 14 March, 1967 [23 March, 1966], No. 11846/67. Heading B1X. A chip feeder valve for a continuous digester system comprises valve housing 17, rotor 19 rotatable in the cylindrical bore of housing 17, in the rotor circumferentially spaced pockets 21 opening to the periphery of the rotor, chip bin 24 supplying chips to chip supply opening 23 in housing 17, a liquor supply opening in the housing, for example low pressure liquor supply opening 26 and high pressure liquor supply opening 29 both fed from reservoir 13, and axially aligned flushing openings 41, 42 (Fig. 3 not shown), opening 41 being connectable with a source of pressurized liquor, i.e. from digester 11 to flush the chips from pockets 21, and opening 42 being connectable to the digester for delivering the chips in the high pressure liquor to the digester. Rotor (19) has inwardly tapered end walls (52), (53) and its shaft (54) is journalled in bearing members (56), (57) carried in housing ...

Improvements relating to digesters

... 141,708. Aktiebolaget Vaporackumulator. April 12, 1919, [Convention date]. Digesters.-To prevent the liquid contents of a steam-heated digester from flowing into the steam pipe when the pressure in the pipe is below that in the digester, steam, air, water or other fluid at a higher pressure than the maximum pressure on che digester is forced into the steam pipe at a point intermediate of the cut-off valve and a non- return valve. The part T of the steam pipe between the cut-off valve A and the non-return valve B is arranged vertically so as to form a liquid seal. A supply of high pressure steam or other fluid enters the top of the seal from a pipe M. The cut-off valve and the vertical part of the steam pipe are made of acid-proof metal. The high-pressure steam supplied to the seal may be taken from a steam accumulator connected to the boiler by a pipe containing a non-return valve.

Digesters

... 939,604. Endless conveyers. BAUER BROS. CO. Nov. 25, 1960 [Nov. 30, 1959], No. 40695/60. Class 78 (1). [Also in Group XIII] A continuous treatment digester of the moving conveyer type consists of a cylindrical tube closed at both ends, one end having a closure unit with an inwardly facing concave surface, a conveying means in the tube to conduct fragmentary fibrous material continuously along the tube from an inlet to the concave surface and then back along the tube to an outlet, and flights on the conveying means to receive the fragmentary material in loosely packed form, each flight having a leading inclined edge that leads the flight into the turn at the end with the closure unit. The digester as shown has an inlet 29 and an outlet 36 in the tube shell 10 and is filled with a quantity of cooking liquor below the levels of the inlet and outlet. A rotary valve 33 admits predetermined metered quantities of fibrous material, which is conducted down the tube by the continuous conveyer which ...

Revolving chip feeder

... 1,117,016. Revolving chip feeder. BELOIT CORPORATION. 1 March, 1967 [11 March, 1966], No. 9640/67. Heading B1X. A digester system for digesting wood-chips comprises revolving chip feeder 17 or 18 having cylindrical housing 19 closed by end walls 21, 22; rotor 27 mounted on shaft 31 for rotation within the housing, a plurality of axially extending passages 28 through the rotor, first and second mutually aligned connections 42, 43 in end walls 21, 22 respectively and adapted respectively to deliver low pressure liquor and chips into passages 28 and to remove low pressure liquor from the passages as the passages come into register with connections 42, 43 on rotation of rotor 27, screen means 47 across the opening to connection 43 to prevent chips leaving passage 28 with the liquor, and third and fourth mutually aligned connections 50, 51 in end walls 21, 22 respectively and adapted respectively to deliver high pressure liquor into passages 28 and to flush the high pressure liquor and the chips ...

The Krotov Pulper

APPARATUS FOR DELIGNIFICATION AND BLEACHING OF FIBERS

Method and device for the production of fibrous matters.

BEHÄLTER MIT ABGABEVORRICHTUNG

PROCEDURE AND DEVICE FOR MANUFACTURING PULP

DEVICE AND PROCEDURE FOR THE WITHDRAWAL OF CELLULOSEPULPE FROM A CONTAINER

FILTER AGGREGATE FOR CELLULOSE DIGESTERS

RUN DIGESTER FOR CELLULOSE WITH APPROPRIATE PROCEDURE AND CYCLE

PROCEDURE FOR THE PRODUCTION A CELLULOSE CELLULOSE IN A KONTINUERLICHEN DIGESTER IN ENERGY-EFFICIENT WAY

VERFAHREN UND VORRICHTUNG ZUM ZUFÜHREN VON HOLZSCHNITZELN IN EIN SILO

VORRICHTUNG ZUR VERTEILUNG VON SUSPENSIONEN, INSBESONDERE ZELLSTOFFSUSPENSIONEN, IN EINEM BEHÄLTER

EINSPEISEVERFAHREN

VERFAHREN ZUR ALTPAPIERAUFBEREITUNG UND VORRICHTUNG ZUR DURCHFUEHRUNG DES VERFAHRENS

VERFAHREN ZUR BEHANDLUNG VON ZELLULOSEMATERIAL IN EINER ZELLULOSE - AUFSCHLUSSANLAGE

VERFAHREN UND VORRICHTUNG ZUM AUSTRAGEN EINES MEDIUMS AUS EINEM BEHAELTER

TREATMENT REACTOR FOR STRAW OR OTHER LIGHT UNMANAGEABLE MATERIALS

Apparatus for dewatering bulk or flowable feed material

Die Erfindung betrifft eine Vorrichtung zum Entwässern von schüttfähigem oder fließfähigem Aufgabegut, beispielsweise Holzhackschnitzel, durch dessen Verdichtung mit einem Gehäuse (10) mit einem Mantelrohr (18, 21), in dem eine Welle (12) mit umfangseitig umlaufenden Wendeln (13) um eine Rotationsachse rotiert, wobei das Aufgabegut durch das Gehäuse (10) transportiert und verdichtet wird und das Restwasser durch Öffnungen (15) im Mantelrohr (18, 21) aus der Vorrichtung geleitet wird und einem Aufgabeschacht (9) zur Zufuhr des zu entwässernden Aufgabegutes. Sie ist vornehmlich dadurch gekennzeichnet, dass das Mantelrohr aus zwei Halbschalen (18, 21) besteht, deren Längsflansche (17) vertikal übereinander angeordnet sind und dass der Aufgabeschacht (9) eine lösbare Seitenwand (22) aufweist, die in ihrer Form und Gestaltung ein Entfernen der Schnecke (12) erlaubt.

CONTINUOUS LIQUID GUIDANCE CONTINUOUS ONE LIQUID GUIDANCE

DEVICE FOR CONTINUOUS TREATING OF CELLULOSE FIBERS CONTAINING MATERIAL AND APPLICATION OF THIS DEVICE

FILTERPRESSE

VERFAHREN UND VORRICHTUNG ZUM AUSTRAGEN VON LIGNOZELLULOSEM ROHMATERIAL AUS EINEM KOCHER UND ZUR FÖRDERUNG DES ROHMATERIALS ZU EINEM REFINER

Apparatus for dewatering bulk or flowable feed material

Die Erfindung betrifft eine Vorrichtung zum Entwässern von schüttfähigem oder fließfähigem Aufgabegut, beispielsweise Holzhackschnitzel, durch dessen Verdichtung mit einem Gehäuse mit einem Mantelrohr, in dem eine Welle mit umfangseitig umlaufenden Wendeln um eine Rotationsachse rotiert, wobei das Aufgabegut durch das Gehäuse transportiert und verdichtet wird und das Pressat durch Öffnungen im Mantelrohr aus der Vorrichtung geleitet wird und wobei ein Innenrohr vorgesehen ist. Sie ist vornehmlich dadurch gekennzeichnet, dass das Innenrohr aus Segmenten aufgebaut ist, die Öffnungen aufweisen, wobei die Segmente mit ihrer Außenfläche direkt an der Innenfläche des Mantelrohres aufliegen und die Öffnungen der Segmente die Öffnungen des Mantelrohrs überdecken, wobei die Segmente aus verschleißfestem Material bestehen. Die Erfindung betrifft weiters ein Segment eines Innenrohrs für eine obige Vorrichtung, die dadurch gekennzeichnet ist, dass das Segment aus verschleißfestem Material und vorzugsweise ...

DEVICE TO THE CONTINUOUS EXPLANATION OF PLANT PARTS OF FUR THE CELLULOSE PRODUCTION

HEATING DEVICE

EXTENDED FORCE COOKING WITH THE WASH CYCLE OF CAUSING INSTRUCTION CAUSTIC SOLUTION

MASS TOWER AND DEVICE FOR ITS DISCHARGING.

EINSPEISEVERFAHREN

INCREASE OF THE QUALITY WHEN CONTINUOUS CELLULOSE COOKING.

HIGH PRESSURE CONTAINER WITH RAMMING MECHANISM

DEVICE FOR THE TREATMENT OF CELLULOSE MATERIAL.

DIGESTER FOR CONTINUOUS UNLOCKING OF SYNTHETIC MATERIAL

PROCEDURE FOR THE SOLVENT CONSTANT EXPLANATION

DEVICE TO THE CONTINUOUS EXPLANATION OF PLANT PARTS OF FUR THE CELLULOSE PRODUCTION

PROCEDURE AND DEVICE FOR THE FILLING OF A PAPER PULP CONTAINER

SCHWARZ-LAUGEN IMPREGNATION IN SINGLE CONTAINER DIGESTERS

PROCEDURE AND DEVICE FOR THE CELLULOSE TREATMENT

DISTRIBUTION DEVICE FOR STUFF SUSPENSIONS

PROCEDURE AND DEVICE FOR CHEMICAL AUFSCHLUSZ CELLULOSEHALTIGEN MATERIAL

PROCEDURE FOR THE PRODUCTION OF CELLULOSE

CONTROL OF THE SOLVED SOLIDS DURING THE CELLULOSE PRODUCTION

ВЕНÄLТЕR МIТ АВGАВЕVОRRIСНТUNG

ВЕНÄLТЕR МIТ АВGАВЕVОRRIСНТUNG

ВЕНÄLТЕR МIТ АВGАВЕVОRRIСНТUNG

ВЕНÄLТЕR МIТ АВGАВЕVОRRIСНТUNG

ВЕНÄLТЕR МIТ АВGАВЕVОRRIСНТUNG

ВЕНÄLТЕR МIТ АВGАВЕVОRRIСНТUNG

ВЕНÄLТЕR МIТ АВGАВЕVОRRIСНТUNG

ВЕНÄLТЕR МIТ АВGАВЕVОRRIСНТUNG

ВАРОЧНЫЙ КОТЕЛ ПЕРИОДИЧЕСКОГО ДЕЙСТВИЯ

1. Варочный котел периодического действия, содержащий цилиндрический корпус с крышкой и днищем, снабженный системой трубопроводов для подачи и удаления рабочего раствора, и циркуляционный контур, включающий центробежный насос и теплообменник, отличающийся тем, что в варочный котел дополнительно встроены пьезоэлектрические преобразователи. 2. Варочный котел по п.1, отличающийся тем, что пьезоэлектрические преобразователи встроены в цилиндрический корпус котла. 3. Варочный котел по п.1, отличающийся тем, что пьезоэлектрические преобразователи встроены в днище котла. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 99 488 (13) U1 (51) МПК D21C 7/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ (21), (22) Заявка: 2010127681/12, 06.07.2010 (24) Дата начала отсчета срока действия патента: 06.07.2010 (45) Опубликовано: 20.11.2010 9 9 4 8 8 R U Формула полезной модели 1. Варочный котел периодического действия, содержащий цилиндрический корпус с крышкой и днищем, снабженный системой трубопроводов для подачи и удаления рабочего раствора, и циркуляционный контур, включающий центробежный насос и теплообменник, отличающийся тем, что в варочный котел дополнительно встроены пьезоэлектрические преобразователи. 2. Варочный котел по п.1, отличающийся тем, что пьезоэлектрические преобразователи встроены в цилиндрический корпус котла. 3. Варочный котел по п.1, отличающийся тем, что пьезоэлектрические преобразователи встроены в днище котла. Ñòðàíèöà: 1 ru CL U 1 U 1 (54) ВАРОЧНЫЙ КОТЕЛ ПЕРИОДИЧЕСКОГО ДЕЙСТВИЯ 9 9 4 8 8 (73) Патентообладатель(и): Государственное образовательное учреждение высшего профессионального образования "Московский государственный текстильный университет имени А.Н. Косыгина" (RU) R U Адрес для переписки: 119071, Москва, ГСП-1, М. Калужская, 1, ГОУВПО "МГТУ им. А.Н. Косыгина" (72) Автор(ы): Кошелева Мария Константиновна (RU), Чабаева Юлия Александровна (RU), Голубев Виктор Филиппович (RU), Малышев ...

УСТРОЙСТВО ДЛЯ УПЛОТНЕНИЯ ЩЕПЫ

Устройство для уплотнения щепы, содержащее корпус с установленным в нем поворотным шаром и соплом, отличающееся тем, что корпус выполнен разъемным, в котором образована распределительная камера, и снабжен патрубками для подачи и отвода сжатого воздуха, на поворотном шаре закреплена поворотная пластина, размещенная в распределительной камере. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК D21C 7/06 (13) 109 464 U1 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ (21)(22) Заявка: ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2011120646/12, 20.05.2011 (24) Дата начала отсчета срока действия патента: 20.05.2011 (72) Автор(ы): Сиваков Валерий Павлович (RU), Гребенщиков Юрий Михайлович (RU) (45) Опубликовано: 20.10.2011 Бюл. № 29 (54) УСТРОЙСТВО ДЛЯ УПЛОТНЕНИЯ ЩЕПЫ U 1 1 0 9 4 6 4 R U Стр.: 1 U 1 Формула полезной модели Устройство для уплотнения щепы, содержащее корпус с установленным в нем поворотным шаром и соплом, отличающееся тем, что корпус выполнен разъемным, в котором образована распределительная камера, и снабжен патрубками для подачи и отвода сжатого воздуха, на поворотном шаре закреплена поворотная пластина, размещенная в распределительной камере. 1 0 9 4 6 4 Адрес для переписки: 620100, г.Екатеринбург, Сибирский тракт, 37, УГЛТУ, отдел ОНИРС и ИС R U (73) Патентообладатель(и): Государственное образовательное учреждение высшего профессионального образования "Уральский государственный лесотехнический университет" (RU) Приоритет(ы): (22) Дата подачи заявки: 20.05.2011 U 1 U 1 1 0 9 4 6 4 1 0 9 4 6 4 R U R U Стр.: 2 RU 5 10 15 20 25 30 35 40 45 109 464 U1 Предлагаемая полезная модель относится к устройствам целлюлозно-бумажной промышленности, в частности к устройствам для уплотнения щепы в варочном котле периодического действия. Известны конструкции паровых уплотнителей технологической щепы, установленные в верхнем коническом днище внутри корпуса варочного котла (см. Тордуа Г.А. Машины и аппараты целлюлозного производства. М.: Лесная ...

УСТРОЙСТВО ДЛЯ АКТИВАЦИИ ФИЗИКО-ХИМИЧЕСКИХ РЕАКЦИЙ В ПРОЦЕССЕ ДЕЛИГНИФИКАЦИИ ДРЕВЕСНОЙ ЩЕПЫ В ВАРОЧНОМ КОТЛЕ

Устройство для активации физико-химических реакций, в процессе делигнификации древесной щепы в варочном котле, выполненное в виде турбулизатора, отличающееся тем, что последний образован рядом параллельно установленных пластин, разделенных на четные и нечетные, объединенные в соответствующие блоки и распределенные по всему поперечному сечению котла, перекрывая его полностью, с образованием сквозных каналов для прохода целлюлозной массы, при этом по меньшей мере один из блоков смонтирован с возможностью возвратно-поступательного перемещения в направлении, перпендикулярном направлению движения целлюлозной массы. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК D21C 7/00 (13) 128 203 U1 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ПОЛЕЗНОЙ МОДЕЛИ К ПАТЕНТУ 2012141038/12, 26.09.2012 (24) Дата начала отсчета срока действия патента: 26.09.2012 (73) Патентообладатель(и): Тарантин Сергей Анатольевич (RU) (45) Опубликовано: 20.05.2013 Бюл. № 14 R U 1 2 8 2 0 3 Формула полезной модели Устройство для активации физико-химических реакций, в процессе делигнификации древесной щепы в варочном котле, выполненное в виде турбулизатора, отличающееся тем, что последний образован рядом параллельно установленных пластин, разделенных на четные и нечетные, объединенные в соответствующие блоки и распределенные по всему поперечному сечению котла, перекрывая его полностью, с образованием сквозных каналов для прохода целлюлозной массы, при этом по меньшей мере один из блоков смонтирован с возможностью возвратно-поступательного перемещения в направлении, перпендикулярном направлению движения целлюлозной массы. Стр.: 1 U 1 U 1 (54) УСТРОЙСТВО ДЛЯ АКТИВАЦИИ ФИЗИКО-ХИМИЧЕСКИХ РЕАКЦИЙ В ПРОЦЕССЕ ДЕЛИГНИФИКАЦИИ ДРЕВЕСНОЙ ЩЕПЫ В ВАРОЧНОМ КОТЛЕ 1 2 8 2 0 3 Адрес для переписки: 117519, Москва, ул. Варшавское ш., 142, корп.1, кв.123, С.А. Тарантинину R U Приоритет(ы): (22) Дата подачи заявки: 26.09.2012 (72) Автор(ы): Деникин Эрнст Иванович (RU), Нетеса Юрий ...

ВЕРТИКАЛЬНЫЙ ВАРОЧНЫЙ КОТЕЛ

Полезная модель вертикального варочного котла предназначена для обеспечения эффективного удаления химических и других примесей из технологической древесины с получением α-целлюлозы, отвечающей требованиям соответствующих стандартов при получении заданного фракционного состава и повышения эффективности процесса. Изобретение относится к целлюлозно-бумажной промышленности, в частности варочного котла для непрерывной варки волокнистого материала. Оно может быть использовано в других отраслях промышленности, например, в схемах по переработке бытовых отходов водой при сверхкритических параметрах (СКВО), получения крупнозернистого гидроксида алюминия в технологии получения глинозема и др. Техническим результатом является: 1. Повышение производительности котла путем создания псевдоожиженного движения технологической древесной щепы в двухступенчатом котле цилиндроконической формы, обеспечивающего равномерное проникновение варочного раствора внутрь щепы. 2. Повышение эксплуатационной надежности варочного котла, так как в котле отсутствуют дополнительные конструкционные элементы внутри корпуса, которые препятствуют движению потока щепы, при сохранении регламентированных механических и физико-химических свойств получаемой целлюлозы. Поставленная задача достигается тем, что вертикальный варочный котел, включающий цилиндроконический корпус с расположенными соосно горловинами для загрузки технологической щепы и выгрузки готового продукта, крышку и разгрузочный узел, жестко прикрепленные к корпусу котла, и технологические отверстия для отвода сред, отличающийся тем, что варочный котел выполнен двухступенчатым, при этом первая ступень состоит из последовательно соединенных в едином корпусе конуса с углом конусности 30 - 45°, в котором предусмотрены технологические отверстия для тангенциального ввода варочного раствора и окислителя, и цилиндра, при этом отношение высот конической части к цилиндрической части равно 0,1 - 1,1, а вторая ступень состоит из конуса с углом конусности 20 - ...

Method and device for thermal hydrolysis and steam explosion of biomass

It is described a process for thermal hydrolysis and team explosion of biomass, said method comprising the steps of: (i) leading the biomass approximately continuous to a first preheating step and preheat the biomass, (ii) leading the preheated biomass into at least two reactors sequentially, (iii) heating and pressurising the reactor by addition of steam, (iv) keeping the re-actor(s) at a certain temperature and pressure for a certain time, (v) leading the heated and pressurised biomass from the reactor(s) to a first pressure relief tank without any substantial pressure reduction and quickly relief the pressure of the biomass by means of a nozzle, in order to disintegrate the biomass, (vi) leading the biomass from the first pressure relief tank to a second pressure relief tank having a lower pressure than the pressure of the first pressure relief tank, (vii) leading the so treated biomass to a downstream facility for subsequent treatment. The invention also comprises a device for thermal treatment of biomass.

METHOD AND SYSTEM FOR EFFICIENT PRODUCTION OF DISSOLVING PULP IN A KRAFT MILL PRODUCING PAPER GRADE PULP WITH A CONTINUOUS TYPE DIGESTER

A method and system for pulp manufacturing used in connection with a kraft process includes a vertical pressure vessel operated in batch mode, a single-vessel or multi-vessel continuous digester, and other equipment for further processing brown stock, such as for washing, oxygen delignification, bleaching, and drying. A feeder and conveyance system may include a high pressure feeder or direct pump system, and selectively provides fiber-containing material to the continuous digester when making lower grade pulp product and to the vertical pressure vessel when making higher grade pulp such as dissolving pulp. The vertical pressure vessel is used for pre-hydrolysis and neutralization, after which the resulting pulp is fed to the continuous digester for cooking. White liquor and black liquor from the same mill may be used for the neutralization fluids. The same continuous digester is selectively used for cooking in connection with making pulp products of different grades or quality. 1. A system for selectively producing pulp of different grades , comprising:a continuous digester operable to selectively carry out kraft cooking of paper grade pulp or dissolving pulp;a vertical pressure vessel upstream from said continuous digester operable to perform pre-hydrolysis and neutralization in a batch mode when the system is producing dissolving pulp but not utilized in connection with making paper grade pulp; anda feeder and pre-treatment system operable to selectively supply organic fiber-containing material to the vertical pressure vessel when making dissolving pulp and to the continuous digester when making paper grade pulp.2. The system of claim 1 , further comprising a storage tank interposed between the vertical pressure vessel and the continuous digester for storing treated chips that have been subject to pre-hydrolysis and neutralization in the vertical pressure vessel claim 1 , to facilitate a steady flow of the treated chips to the continuous digester when making ...

METHOD AND SYSTEM FOR IMPREGNATING CHIPS

The withdrawal screen section is for impregnation of chips during the manufacture of chemical pulp. Chips are steamed and impregnated in a low pressure impregnation vessel using pressurised hot spent cooking liquor BL. The spent cooking liquor produces most of the steam BL, necessary for steaming the chips. To reduce the need for adding fresh steam for chip steaming is a first withdrawal section in the impregnation vessel modified to be used both as a flash tank for warm pressurised wash filtrate and improved wash-out feature for the spent impregnation liquid behind the screen in the withdrawal section. The withdrawal volume is arranged with an upper part located above the liquid level LIQof the impregnation vessel. Additional pressurised warm wash liquor RECis added to the withdrawal volume and flashed off steam is led in a steam duct to the chip volume above the liquid level. 1. A method for the impregnation of chips during the manufacture of chemical pulp , comprising;continuously feeding chips without preceding steam treatment to a top of an impregnation vessel,feeding out impregnated chips from a bottom of the impregnation vessel,adding hot impregnation fluid (BL), at a first temperature above a boiling point of the hot impregnation fluid, to the impregnation vessel, via a pipe having an outlet end located below a chip level (CHLEV) established in the impregnation vessel and at a distance from walls of the impregnation vessel, releasing steam into a chip volume for steaming the chips,the added impregnation fluid (BL) establishing a fluid level (LIQLEV) in the impregnation vessel,the chip level (CHLEV) being above the fluid level and the top of the impregnation vessel having a pressure that is essentially at atmospheric pressure,withdrawing spent impregnation fluid (REC), at the fluid level (LIQLEV), from a withdrawal volume located behind screens mounted in a wall of the impregnation vessel,{'b': '1', 'adding an additional fluid (REC) at a second temperature ...

CONTINUOUS DIGESTER WITH A BOTTOM SCRAPER EQUIPPED WITH DRAINING APERTURES

The continuous digester is for producing pulp from comminuted cellulosic material. The digester has a cone diverter on a bottom scraper arranged in the bottom of the digester for assisting in out feed of pulp produced. The cone diverter of the bottom scraper has an upper inclined surface of the cone diverter with an inclination angle in the range 30±10 degrees in relation to the vertical. In order to improve washing performance in the bottom of the digester, especially for overloaded digesters, the upper inclined surface is equipped with draining apertures in fluid communication with a liquid receiving chamber inside the cone diverter. The liquid receiving chamber is connected via a drainage channel to the exterior of the vessel. 1. A continuous digester for producing pulp from comminuted cellulosic material , comprising ,a vertically extending cylindrical digester vessel,a feeder disposed at an upper end of the vessel,a pulp discharge having an outlet defined therein at a lower end of the vessel,addition means for adding liquid (DL) in a lowermost part of a vessel wall,the vessel having a rotatable bottom scraper arranged at a center and bottom of the vessel,the scraper being in operative engagement with a vertical drive shaft for assisting in out-feed of pulp from the vessel,the bottom scraper having a cone diverter fixedly arranged to and co-rotatable with the bottom scraper,the cone diverted being located above the bottom scraper,the outlet being co-axially arranged about the vertical drive shaft,an upper inclined surface of the cone diverter having an inclination angle (α) in a range of 30±10 degrees relative to a vertical axis (CL),the upper inclined surface having draining apertures defined therein in fluid communication with a liquid receiving chamber (CC) disposed inside the cone diverter, andthe liquid-receiving chamber being connected to a drainage channel, the liquid-receiving chamber extending to an exterior of the vessel.2. The continuous digester ...

METHODS FOR THE OXYGEN-BASED DELIGNIFICATION OF PULP

Pulp is delignified by forming a mixture of pulp and caustic, adding oxygen and feeding this oxygen-containing mixture to a first step reactor. The lignin in the oxygen-containing mixture will be partially delignified and will be fed to a second step reactor where the remainder of the lignin in the pulp will be delignified. In this manner, fast reacting lignin can be treated in the first step reactor and slow reacting lignin can be treated in the second reactor. The delignified pulp is recovered from the apparatus and after washing can be forwarded to a bleaching unit. 1. A method for delignifying pulp comprising the steps of:(a) Forming a mixture of the pulp and caustic;(b) Feeding oxygen to the mixture and feeding the oxygen-containing mixture to a first step reactor wherein lignin will delignify;(c) Feeding the oxygen-containing mixture to a second step reactor wherein lignin will delignify; and(d) Recovering the delignified pulp.2. The method as claimed in wherein the lignin in step b) is fast reacting lignin.3. The method as claimed in wherein the lignin in step c) is slow reacting lignin.4. The method as claimed in wherein the pulp is selected from the group consisting of medium and high consistency pulp.5. The method as claimed in claim wherein the caustic is sodium hydroxide6. The method as claimed in wherein the oxygen is greater than 80% purity.7. The method as claimed in wherein steam is added to the mixture of pulp and caustic before being fed into the first step reactor.8. The method as claimed in wherein the oxygen-containing mixture comprises a gas phase and a liquid phase.9. The method as claimed in wherein the first step reactor is a reactor where the gas phase is the continuous phase and the liquid phase is the dispersed phase.10. The method as claimed in wherein supplemental oxygen may be added to the mixture of pulp and caustic after step (b).11. The method as claimed in wherein the oxygen-containing mixture is present in the first step reactor ...

AN ARRANGEMENT FOR INSTALLATION OF MONITORING SENSORS OF A TREATMENT VESSEL FOR LIGNOCELLULOSIC MATERIAL

An arrangement for installations of monitoring sensors of a vessel for treatment of lignocellulosic material, which vessel () has a central pipe () including at least one concentric pipe (), mounted coaxially within the vessel (). At least one sensor channel () is arranged along the outermost wall of the concentric pipe () of the central pipe () and that the at least one sensor channel () is connected to a cable conduit (), which cable conduit () connects the exterior of the vessel () to the at least one sensor channel ()) and the sensor channel () is several meters long and has plurality of holders () for sensors () and/or is configured to contain plurality of thermal sensors () with their cables (). 1. An arrangement for installations of monitoring sensors of a vessel configured to treat lignocellulosic material , wherein the vessel includes a central pipe comprising at least one concentric pipe mounted coaxially within the vessel , the arrangement comprising:at least one sensor channel arranged along an outermost wall of the at least one concentric pipe of the central pipe, anda cable conduit connected to the at least one sensor channel and connected to an exterior of the vessel,wherein the at least one sensor channel is at least one meter long and includes at least one of: (i) a plurality of sensor holders configured to hold sensors is and (ii) a plurality of thermal sensors with cables for the thermal sensors.2. The arrangement of claim 1 , wherein an interior of an outer wall of the at least one sensor channel is longitudinally divided into at least two sensor channels claim 1 , and the outer wall is a concentric pipe attached to an outer wall of the central pipe.3. The arrangement of claim 1 , wherein an outer wall of the at least one sensor channel is welded along opposite sides of the outer wall to the central pipe.4. The arrangement of claim 1 , wherein the at least one sensor channel includes at least one subchannel.5. The arrangement of claim 4 , wherein ...

ARRANGEMENT AND METHOD FOR DEGASSING A PUMP

An arrangement and a method for controlling a gas flow separated from a suspension of medium consistency pulp. The pulp is treated in a pulp treatment apparatus including a first pump and a second pump, wherein the second pump is a degassing centrifugal pump provided with a degassing system including a degassing conduit in which a degassing valve is arranged for regulating a pressure difference between an inlet of the second pump and the degassing conduit. The degassing system further includes a pressurized degassing vessel working under overpressure and having an inlet and an outlet, wherein the outlet of the vessel is connected to a pressure control valve for maintaining a desired overpressure in the vessel. 1. An arrangement configured to control a gas flow separated from a suspension of medium consistency pulp in a pulp treatment apparatus , the arrangement comprising:a first pump and a second pump, wherein the second pump is a degassing centrifugal pump with a degassing system, and a degassing conduit;', 'a degassing valve connected to the degassing conduit and the degassing valve is configured to regulate a pressure difference between an inlet of the second pump and the degassing conduit, and', 'a pressurized degassing vessel in an overpressure condition and including an inlet and an outlet, wherein the outlet of the degassing vessel is connected to a pressure control valve configured to maintain the overpressure condition of the degassing vessel., 'the degassing system comprises2. The arrangement according to claim 1 , wherein the pressurized degassing vessel includes a horizontal pipe claim 1 , wherein an inlet of the horizontal pipe is connected to the degassing conduit claim 1 , and an outlet of the horizontal pipe is connected to an outlet conduit connected to the pressure control valve.3. The arrangement according to claim 2 , wherein the degassing system further comprises:a water separator connected to the outlet conduit downstream of the pressure ...

VENT STACK TEMPERATURE AS A FEEDFORWARD VARIABLE FOR SMELT DISSOLVING TANK TTA CONTROL

Methods and systems for controlling operation of a smelt dissolving tank receiving a flow of smelt and having a vent stack in fluid communication are provided. A dissolving liquid is injected into the smelt dissolving tank at a predetermined injection rate. A temperature of a flow of vapour in the vent stack is measured with a sensor. The injection rate of the dissolving liquid is controlled based on the temperature of the flow of vapour. 1: A method for controlling operation of a smelt dissolving tank receiving a flow of smelt and having a vent stack in fluid communication with the smelt dissolving tank , comprising:injecting, at a predetermined injection rate, a dissolving liquid into the smelt dissolving tank;measuring a temperature of a flow of vapour in the vent stack with a sensor; andcontrolling the injection rate of the dissolving liquid based on the temperature of the flow of vapour.2: The method of claim 1 , further comprising:measuring at least one parameter of an output product of the smelt dissolving tank; andfurther adjusting the injection rate of the dissolving liquid based on the at least one parameter.3: The method of claim 2 , wherein the output product is green liquor.4: The method of claim 3 , wherein the at least one parameter comprises a density of the green liquor.5: The method of claim 3 , wherein the at least one parameter is a concentration of total titratable alkali in the green liquor.6: The method of claim 1 , wherein adjusting the injection rate comprises setting the injection rate between a predetermined minimum injection rate and a predetermined maximum injection rate.7: The method of claim 6 , wherein at least one of the minimum injection rate and the maximum injection rate is based on a safety requirement.8: The method of claim 1 , wherein the dissolving liquid is recycled water from a milling process.9: The method of claim 1 , wherein measuring the temperature with the sensor comprises measuring the temperature with the sensor ...

METHOD AND ARRANGEMENT FOR GENERATING STEAM AT A DIGESTER PLANT OF A CHEMICAL PULP MILL

The present invention relates to a method of producing steam at a digester plant of a chemical pulp mill. Black liquor is discharged from the digester at a first temperature and pressure. The black liquor is treated in a flash tank for generating flashed black liquor and flash steam at a second temperature and a second pressure, which are lower than the first temperature and pressure. The flashed black liquor is taken for further treatment to the evaporation plant. The flash steam is led to an indirect heat exchange contact with clean liquid in the reboiler for boiling the liquid and for generating steam. The steam is led from the reboiler into a fan or compressor for increasing the steam pressure to a third pressure, which is higher than the second pressure and for adjusting the pressure of the steam in the flash tank. Steam at a third pressure is used for pretreating comminuted cellulosic fiber material, such as chips, prior to cooking. 1. A method for producing steam at a digester plant of a chemical pulp mill , the method comprises:a) a suspension formed of pretreated comminuted cellulosic fiber material and liquid is led into a digester for producing chemical pulp;b) the material is treated in the digester with a treatment chemical for producing pulp and black liquor;c) the black liquor is discharged from the digester at a first temperature and a first pressure;d) the black liquor is treated in a flash tank for producing flashed black liquor and flash steam at a second temperature and a second pressure, which are lower than the first temperature and pressure;e) the flashed black liquor is led into further treatment to the evaporation plant;f) the flash steam is led to an indirect heat exchange contact with clean liquid in a reboiler for boiling the liquid and for generating steam;g) the steam formed in step f) is led from the reboiler into a fan or compressor for increasing the steam pressure to a third pressure, which is higher than the second pressure and for ...

METHOD AND ARRANGEMENT FOR TREATING CHEMICAL PULP

A method to pulp cellulosic fibrous material including: alkaline cooking cellulosic fibrous material in a continuous digester vessel to produce a pulp having a kappa number in a range of 50 to 120; washing the pulp discharged from the digester vessel; treating the washed pulp in the presence of oxygen and alkali to remove lignin; washing the oxygen-treated pulp such that the kappa number is recued by at least at least 30; separating lignin from wash filtrate generated by the washing of the oxygen-treated pulp, and using the separated wash filtrate as a washing liquid in the washing of the pulp from the digester vessel. 1. A method of treating chemical pulp comprising:alkaline cooking cellulosic fibrous material to produce a pulp having a kappa number in a range of 50 to 120;washing the pulp;feeding the washed pulp to an oxygen stage in which the wash pulp is treated in the presence of oxygen and alkali to remove lignin;washing the oxygen-treated pulp such that the kappa number by at least at least 30, andseparating lignin from wash filtrate generated by the washing of the oxygen-treated pulp, andapplying the separated wash filtrate as a washing liquid used in the washing of the pulp.2. The method according to claim 1 , wherein the washing of the pulp is with a washer having an E-value of at least 8.3. The method according to claim 1 , the decrease of the kappa number is at least 35.4. The method according to claim 1 , wherein the oxygen stage includes oxidizing with sodium hydroxide.5. The method according to claim 1 , further comprising first screening the pulp downstream of the oxygen stage.6. The method according to claim 5 , wherein the oxygen stage is a first oxygen stage and the method further comprises screening the washed pulp downstream of the first oxygen stage and upstream of a second oxygen stage.7. The method according to claim 1 , further comprising knot-separation of the pulp prior to treating the pulp with the oxygen stage.8. The method according to ...

High Consistency Re-Pulping Method, Apparatus and Absorbent Products Incorporating Recycled Fiber

A method of pulping wastepaper includes providing a pulping vessel with a rotor and at least one flow sensor adapted to measure slurry flow within the pulping vessel. The pulping vessel is charged with wastepaper and water to form a slurry, the amounts of wastepaper and water being present such that the slurry has consistency in the range of from 10% to 30%. The wastepaper charge in the pulping vessel is pulped at a pre-selected power level while monitoring poloidal slurry flow in the pulping vessel; and from time-to-time, water may be added to the pulping vessel when the poloidal flow falls below a predetermined lower threshold flow value in order to reduce viscosity and thereby restore poloidal flow within the pulping vessel. Doppler velocimetry is a preferred method of monitoring pulp flow. In a particularly preferred construction the rotor has a variable power drive. The inventive method is especially useful for making high quality, high brightness furnishes from wastepaper which varies from batch to batch. 1. A high consistency pulping apparatus comprising:(a) a pulping tub for receiving a wastepaper slurry;(b) a rotor disposed in the pulping tub, coupled to a power drive; and(c) at least one flow sensor attached to the pulping tub adapted to measure slurry flow within the pulping vessel.2. The apparatus according to claim 1 , wherein the flow sensor is an ultrasonic Doppler flow sensor.3. The apparatus according to claim 2 , wherein the flow sensor is a directional Doppler effect ultrasonic flow sensor.4. The apparatus according to claim 2 , wherein the pulping tub is provided with a plurality of ultrasonic Doppler flow sensors.5. The apparatus according to claim 1 , wherein the power drive is a variable power drive.6. The apparatus according to claim 5 , wherein the variable power drive is a variable frequency power drive comprising an AC drive and an AC motor.7. A high consistency pulping apparatus comprising:(a) a pulping tub with a bottom and a sidewall ...

PROFILE BAR SCREEN FOR DIGESTER VESSELS

The improved profile bar screen is for draining treatment liquor from a suspension of comminuted cellulose material and treatment liquor in an essentially cylindrical digester vessel. The profile bar screen is designed with horizontal support arches that have expansion slots allowing the otherwise rigid structure of the support arches to flex and adapt to any unevenness of the vessel wall, thus allowing support shoulders to rest against the inside of the vessel wall. 1. A profile bar screen for draining treatment liquor from a suspension of comminuted cellulose material and treatment liquor in an essentially cylindrical digester vessel , said profile bar screen being arranged inside the outer wall of the digester vessel forming a withdrawal chamber between the wall of the digester vessel and the profile bar screen , the profile bar screen comprising:vertical profile bar elements facing the suspension of comminuted cellulose material, said vertical profile bars arranged in parallel to each other and forming a withdrawal slot for treatment liquor between neighboring profile bars;several horizontal support arches having vertical mounting slots for holding a profile bar element in said mounting slots, the horizontal support arches having integrated support shoulders resting against the inside of the outer wall of the cylindrical digester vessel;said horizontal support arches being equipped with additional expansion slots having an open end facing towards the interior of the digester vessel and a closed end in the area of a support shoulder, allowing a flexibility of the horizontal support arches such that support shoulders rest against the wall of the digester vessel despite any local deviations from a perfect cylindrical shape of the digester vessel wall.2. A profile bar screen as claimed in claim 1 , wherein the expansion slots has a depth (X) through the horizontal support arches exceeding the depth (Y) of the horizontal support arches where no support shoulder is ...

Device for preparing a substance

A device ( 1 ) for preparing a substance suspension, in particular a pulp suspension, with a container ( 2 ), with stator sheets ( 30 ) provided in the interior of the container and designed as baffles, and with a rotor ( 4 ) in the container, on which rotor a dispersing disk ( 8 ) is provided, includes an annular displacement element ( 20 ) provided in the interior of the container ( 2 ), an element whose outside surface ( 22 ) is some distance from the inside surface ( 23 ) of the wall ( 24 ) of the container ( 2 ). The inner opening ( 21 ) of the displacement element ( 20 ) that is arranged coaxially to the rotor is hopper-like, whereby the expanded area of the opening points to the cover ( 3 ) of the container ( 2 ). The stator sheets provided in the container span the channel ( 25 ) between the exterior ( 22 ) of the displacement element ( 20 ) and the interior ( 23 ) of the wall ( 24 ) of the container.

METHOD OF DIGESTING CELLULOSE FIBROUS MATERIAL IN A CONTINUOUS DIGESTER

The invention discloses a method of continuous cooking cellulose fibrous material in a digester, said digester having a top and a bottom. The method of the invention comprises the steps of:—feeding a slurry comprising cellulosic fibrous material and cooking liquor into the top the digester,—feeding a first washing liquor into the bottom portion of the digester, which first washing liquor moves counter currently up through at least part of the digester,—removing pulp from the bottom of the digester,—feeding a second washing liquor into the center of the digester at least at the level of a first screen section,—feeding a third washing liquor into the center of the digester at the level of a second screen section, and—withdrawing the cooking liquor and the washing liquors from the first screen section and from the second screen section, which first screen section is arranged in a lower part of the digester and which second screen section is arranged below said first screen section. Thus, in accordance with the invention, a third washing liquor is added to the center of digester at the level of an additional, second extraction screen section arranged in the lower part of the digester. The method makes it possible to increase the production rate in the digester but still maintain or even increase the washing efficiency. 1. A method of continuous cooking cellulose fibrous material in a digester , said digester having a top and a bottom , comprising the steps offeeding a slurry comprising cellulosic fibrous material and cooking liquor into the top of the digester,feeding a first washing liquor into the bottom of the digester, which first washing liquor moves counter currently up through at least part of the digester,removing pulp from the bottom of the digester,feeding a second washing liquor into the center of the digester at least at the level of a first screen section,feeding a third washing liquor into the center of the digester at the level of a second screen section, ...

DEVICE AND METHOD FOR TREATING THE BLACK LIQUOR RESULTING FROM PULPING BY HYDROTHERMAL LIQUEFACTION

The present invention relates to a paper pulp preparation device comprising a wood component cooking unit and a hydrothermal liquefaction unit. 1. A paper pulp preparation device comprising: paper pulp, and', 'black liquor;, 'a unit for cooking wood components, in which the wood components are separated into two fractions{'sub': 1a', '1b', '1a', '1b, 'the unit for cooking the wood comprising a first inlet Efor introducing wood, a second inlet Efor discharging while liquor, a first outlet Sfor discharging the paper pulp, and a second outlet Sfor discharging the black liquor;'} [{'sub': 12', '1b, 'an inlet Efor the black liquor connected to second outlet Sof the cooking unit;'}, {'sub': '12a', 'a first outlet Sfor an organic phase resulting from the hydrothermal liquefaction;'}, {'sub': '12b', 'a second outlet Sfor an aqueous phase resulting from the hydrothermal liquefaction and containing organic molecules;'}], 'a hydrothermal liquefaction unit allowing the treatment of at least a part of the black liquor, and comprising{'sub': 1-12', '1b', '12, 'a connection line Cbetween outlet Sand inlet E;'}{'sub': '12b', 'claim-text': [{'sub': 17', '12b, 'an inlet Efor the aqueous phase resulting from the hydrothermal liquefaction, connected to outlet Sof the hydrothermal liquefaction unit;'}, {'sub': '17a', 'a first outlet Sof organic molecules;'}, {'sub': '17b', 'a second outlet Sof aqueous phase;'}], 'a separation unit downstream of outlet Sof the hydrothermal liquefaction unit, the separation unit allowing the separation of organic molecules contained in the aqueous phase resulting from the hydrothermal liquefaction, and comprising{'sub': 12-17', '12b', '17, 'a connection line Cbetween outlet Sand inlet E.'}2. The paper pulp preparation device of claim 1 , wherein it further comprises:{'sub': 1b', '5', '5, 'an evaporation unit downstream of outlet Sof the cooking unit, the evaporation unit allowing to concentrate the black liquor, and comprising an inlet Efor the black ...

SYSTEM AND PROCESS FOR PULPING WOOD

Wood pulping process including pulping wood to produce a pulping effluent or liquor. Pre-concentrating the liquor in a pre-concentration unit produces concentrated liquor, a contaminated condensate and a non-contaminated condensate. Directing the concentrated liquor to a multi-effect train of forced circulation solids concentrators that further concentrating the concentrated liquor to form a highly concentrated liquor. Directing the contaminated condensate produced by the pre-concentration unit to a steam stripper and stripping gases therefrom and in the process producing a contaminated vapor stream. Utilizing the contaminated vapor stream and its thermal energy to power the forced circulation solids concentrators of the multi-effect train. 1. A wood pulping process comprising:pulping wood and producing a liquor;pre-concentrating the liquor in one or more evaporators to produce a concentrated liquor, a contaminated condensate, and a non-contaminated condensate;directing the concentrated liquor to a multiple effect train including a series of forced circulation solids concentrators that further concentrate the concentrated liquor to form a highly concentrated liquor;directing the contaminated condensate to a gas stripping unit;steam stripping the contaminated condensate in the gas stripping unit and producing a vapor stream having contaminants stripped from the contaminated condensate;directing the vapor stream from the gas stripping unit to one of the effects of the multiple effect train and heating the concentrated liquor passing through the effect by transferring heat from the vapor stream to the concentrated liquor and employing the thermal energy associated with a vapor stream to power one or more of the other effects of the of the multiple effect train and to heat the concentrate liquor passing therethrough; andburning the highly concentrated liquor produced by the multiple effect train in an incinerator or boiler.2. The method of wherein the liquor is pre- ...

A DISCHARGE VALVE WITH A DETACHABLE INNER LINING

A discharge valve is disclosed which includes a valve housing which can be functionally connected to a process element having a pressurized interior space. The valve housing includes a flow channel having a longitudinal center axis (A) and is in working cooperation with a valve member. The flow channel is arranged to be in fluid communication with the pressurized interior space in the process element after the discharge valve has been connected to the process element. The valve member is displaceable between an open position and a closed position in a displacement direction (B) whereby the discharge valve can be opened and closed. The flow channel comprises a detachable inner lining having an envelope wall, and the detachable inner lining comprises an aperture extending through the envelope wall and through which the valve member is adapted to run when being displaced between the opened and closed positions. 1. A discharge valve comprising a valve housing connectable to a process element having a pressurized interior process volume , said discharge valve comprising a flow channel having a longitudinal center axis (A) and a valve member in working cooperation with said flow channel , said flow channel being arranged to be in fluid communication with said pressurized interior process volume of said process element after connection thereto , said valve member comprising an insertion part being insertable in said flow channel by displacement of said valve member in a displacement direction (B) at an angle (α) to said longitudinal center axis (A) , and being a detachable inner lining at least partly forming said flow channel and having an envelope wall , wherein said detachable inner lining comprises an aperture extending through said envelope wall and through which said valve member is adapted to run when being displaced in said displacement direction (B).2. The discharge valve according to claim 1 , wherein said angle (α) is from 30-150 degrees.3. The discharge valve ...

SYSTEMS AND METHODS TO PRODUCE TREATED CELLULOSE FILAMENTS AND THERMOPLASTIC COMPOSITE MATERIALS COMPRISING TREATED CELLULOSE FILAMENTS

A method and system to produce treated Cellulose Filaments (CF) and CF products are provided. Feedstock comprising CF in a water solution are mixed with a debonder to produce a mixed stream. The mixed stream is filtered yielding separate filtered and filtrate streams. The filtrate stream comprises at least a portion of the debonder. The filtered stream is dried to produce treated CF. The debonder is one of an alcohol, glycol ether, ester-containing quaternary ammonium salt, amido amine quaternary ammonium salt, disubstituted amide or a mixture thereof. The filtrate stream may be recycled. The mixed stream may be washed before filtering to remove debonder. A thermoplastic polymer-treated Cellulose filament composite material is formable by associating the treated CF with a thermopolymer such as polyolefin, polyurethane (PU), polypropylene (PP), polyester (PE), polylactic acid (PLA), polyhydroxyalcanoates (PHA), polyamide (PA), and ethylene vinyl acetate (EVA) or a mixture. 1. A method comprising:mixing a feedstock comprising Cellulose Filaments in a water solution with a debonder to produce a mixed stream;filtering the mixed stream to produce a filtered stream and a filtrate stream, the filtrate stream comprising at least a portion of the debonder; anddrying the filtered stream to produce treated Cellulose Filaments;wherein the debonder is one of an alcohol, glycol ether, ester-containing quaternary ammonium salt, amido amine quaternary ammonium salt, disubstituted amide or a mixture thereof.2. The method of claim 1 , wherein during mixing claim 1 , the debonder adsorbs to a surface of the Cellulose Filaments in a manner such that the debonder physically blocks hydroxyl groups on the surface of the Cellulose Filaments from contacting adjacent Cellulose Filaments claim 1 , thereby weakening the effects of hydrogen bonding between hydroxyl groups of adjacent Cellulose Filaments.3. The method of wherein the Cellulose Filaments in the feedstock comprise individual fine ...

BIN ARRANGEMENT FOR THE COLLECTING AND DISCHARGING OF SMALLER LIGNO-CELLULOSIC MATERIAL

The bin arrangement is for collecting and discharging smaller ligno-cellulosic material. The bin has a transition part from a circular section of the bin and downwardly to a rectangular section with a long and short side of the rectangular section. The transition part could be built with few wall segments, thus needing less welding. Two rotary pocket feeders, each with at least one shaft extending parallel to the long side, are arranged directly under the rectangular section, enabling a uniform feed from the bin. The use of two rotary pocket feeders with this design directly under the bin does not destroy the even feed of material through the bin part, which otherwise is experienced from using conventional feed screws that feed material in a transverse direction from the bin outlet. The bin does not need to have a complex bin design which converges to a small circular inlet to a conventional rotary pocket feeder. 11123454679101112867. A bin arrangement () for collecting and discharging of smaller ligno-cellulosic material , which bin () comprises a cylindrical upper part () with an inlet () , and a conical lower part () with an outlet () , which conical lower part () comprises a circular upper edge () , an essentially rectangular shaped lower edge () having two first opposing long sides ( , ) and two second opposing short sides ( , ) , and a surface () between the upper edge () and the lower edge () , characterized in that{'b': 9', '10', '11', '12, 'the opening formed in the lower edge forms a rectangular shape with a ratio of the first long sides (, ) to the second short sides (, ) in the range of 1.5-4:1, preferably 3:1, and'}{'b': 40', '7, 'directly below the lower edge is a rotary pocket feeder () mounted with an inlet (IN) of the rotary pocket feeder having a form congruent to the rectangular shape of the lower edge () and an outlet (OT) of the rotary pocket feeder on the opposite side of the rotary pocket feeder also having a form congruent to the rectangular ...

METHOD AND ASSEMBLY FOR PROCESSING CELLULOSE PULP OF WOOD PROCESSING INDUSTRY

A method of and an apparatus for processing cellulose pulp of wood processing industry. The method and assembly may be used, on one hand, as a pressure diffuser for washing the pulp before an oxygen stage and, on the other hand, the separation of soap, gas and/or other light materials from filtrates and from black liquor of a cellulose mill in a pressurized device, as well as the new process connections enabled by the method. The method and apparatus may process filtrates from brown stock washing and bleaching as well as black liquors from a digesting department and an evaporation plant. By way of example, the filtrate of the washing department is pumped to the digesting department of a sulfate cellulose mill as well as the black liquor taken from the digesting department to an evaporation plant. 1. A method of processing cellulose pulp , which is produced by digesting from softwood or hardwood chips in a digester , the method comprising:washing digested pulp;processing the washed pulp in an oxygen stage, andafter the oxygen stage, washing and bleaching the washed pulp, andseparating in a pressurized separation apparatus soap, gas or other light materials produced in a digesting process from a filtrate or from black liquor generated by a digester.2. The method of wherein the pressurized separation apparatus is at least one of a hydrocyclone claim 1 , a centrifuge and a pump.3. The method according to claim 1 , the filtrate is from the washing of digested pulp and the separation separates the filtrate into a soap fraction and filtrate fraction essentially free of soap.4. The method according to claim 3 , wherein the essentially soap-free filtrate fraction is fed as washing liquid to another washing stage or into a digester.5. The method according to wherein the soap fraction is fed directly to an evaporation plant or to black liquor flowing to the evaporation plant.6. The method according to claim 1 , wherein the black liquor obtained from the digester is fed to the ...

CONTINUOUS HORIZONTAL DIGESTER

The instant disclosure provides a continuous horizontal digester including a cylindrical pressure cooker capable of rotating by taking its central axis as an axis; a charging apparatus disposed at one end of the cooker which is communicated with an inner cavity of the cooker and can seal the cooker; and a discharging device disposed at the other end of the cooker and communicated with the inner cavity of the cooker, the discharging device is located on the central axis of the cooker. The continuous horizontal digester further includes a cooking device configured to cook the materials in the cooker. 1. A continuous horizontal digester including:a cylindrical pressure cooker capable of rotating along a central axis thereof;a charging device disposed on an end of the cylindrical pressure cooker and communicated with an inner cavity of the cylindrical pressure corker, the charging device being capable of sealing the cylindrical pressure cooker;a discharging disposed on the central axis of the cylindrical pressure cooker and communicated with the inner cavity of the cylindrical pressure cooker; anda cooking device for cooking a material in the cylindrical pressure cooker.2. The continuous horizontal digester according to claim 1 , wherein the charging device includes a charging case divided into at least two parts communicated with each other claim 1 , one of the two parts being communicated with the inner cavity of the cylindrical pressure cooker and rotating synchronously with the cylindrical pressure cooker along the central axis of the cylindrical pressure cooker claim 1 , the other one of the two parts being fixed and connected to a charging opening claim 1 , a sealing device being disposed between the two parts of the charging case.3. The continuous horizontal digester according to claim 2 , wherein the charging device further includes a feed screw disposed inside of the charging case claim 2 , the feed screw being coincided with the central axis of the cylindrical ...

Feeding system comprising pumps in parallel for a continuous digester

The feed system is for a continuous digester where at least two pumps are arranged in parallel in the bottom of a pre-treatment vessel and a liquid level of at least 20 meters is established. The system makes it possible to provide a feed system with an improved accessibility and more reliable operation, and to operate the main part of the pumps at optimal efficiency even if the production capacity is reduced.

METHOD AND SYSTEM FOR THIN CHIP DIGESTER COOKING

An apparatus to pulp thin wood chips including: a chip screen receiving chips of comminuted cellulosic material, the screen assembly including a screening assembly which outputs thin chips; a chip bin and conveyor assembly receiving the thin chips output from the chip screen, the lower portion of the chip bin is flooded with white liquor; a continuous digester vessel having an chip inlet at an upper region of the vessel coupled to the chip bin and conveyor assembly, a cooking zone extending vertically from the upper region of the vessel to a wash zone which extends from the cooking zone to a bottom region of the vessel, and a pulp discharge outlet in the bottom region; a steam inlet at the upper region of the inlet, an upper region of the digester vessel at an elevated cooking temperature, and a screen assembly near the wash liquid inlet for the wash zone. 1. An apparatus to pulp thin wood chips comprising:a chip screen receiving chips of comminuted cellulosic material, the screen assembly including a screening assembly configured to pass thin chips wherein at least 85% of the chips passing through the chip screen have a thickness between 6 mm and 2 mm;a chip bin and conveyor assembly coupled to a thin chips output of the chip screen, the chip bin assembly including a chip bin having a white liquor inlet coupled to a source of white liquor and said chip bin having an operating mode in which a lower portion of the chip bin is flooded with white liquor while thin chips move through the chip bin to a discharge outlet of the chip bin, and the chip bin and conveyor assembly including a conveyor having an inlet configured to receive the thin chips from the discharge outlet and an outlet configured to transfer the thin chips to a transport conduit;a continuous digester vessel including an chip inlet at an upper region of the vessel and coupled to the transport conduit, a cooking zone extending vertically from the upper region of the vessel to a wash zone, the wash zone ...

ADJUSTMENT ASSEMBLY FOR AXIALLY ADJUSTING A ROTOR IN A ROTARY FEEDER

A mounting and support mechanism for a rotary feeder gear motor having an adjusting housing, wherein the adjusting housing includes a support flange adjacent the gear motor, a hollow adjusting housing and a support flange adjacent a stationary feeder end cover. Contained within the adjusting housing is a carrier extension wherein the carrier extension at one end encases a stationary bushing, the stationary bushing houses an adjusting shaft to provide movement of a rotor assembly axially, and at the opposite end the carrier extension connects to a bearing carrier mechanism. 1. An adjustment assembly for axially adjusting a rotor in a rotary feeder comprising:a housing having a first end distally disposed from a second end;a carrier extension disposed within the housing, the carrier extension having a bearing end distally disposed from an adjustment shaft end, wherein the carrier extension is configured to slide axially within the housing, and wherein the adjustment end has areas defining a center opening;a bearing carrier disposed within the housing adjacent to the bearing end of the carrier extension, wherein the bearing carrier is disposed at the first end of the housing, wherein the bearing carrier is configured to slide axially within the housing, and wherein the bearing carrier supports a first thrust bearing configured to engage a shaft connected to a rotor disposed in a rotary feeder;a stationary bushing disposed in the center opening of the adjustment shaft end, wherein an inner wall of the stationary bearing is threaded;a second thrust bearing disposed within the housing at the second end;an adjusting shaft having a threaded end, a motor end distally disposed from the threaded end, and a body extending between the threaded end and the motor end, wherein the threaded end is disposed within the stationary bearing, wherein the motor end is configured to engage a motor, and wherein the body extends through the second thrust bearing.2. The adjustment assembly of ...

SYSTEMS, DEVICES AND METHODS FOR AGRICULTURAL PRODUCT PULPING

This disclosure relates to systems, devices and methods for pulping agricultural products. Features for ensiling agricultural crops, separating solids and liquids, and processing the solids and liquids for use in a variety of products and processes are disclosed. For instance, systems and methods are disclosed for pulping grass crops, making products for energy conversion processes, screening fine debris, cell bursting, using strongly alkaline chemicals in pulping processes, and using sorghum plant for producing pulp. 1. An ensilage system for pulping agricultural crop , the system comprising:an ensilage facility configured to store the crop;a separation stage coupled with the ensilage facility, the separation stage configured to receive the crop from the ensilage facility and to separate solids from liquids in the crop;a liquids pathway coupled with the separation stage and configured to receive the liquids separated in the separation stage and to process the liquids for energy production; anda solids pathway coupled with the separation stage and configured to receive the solids separated in the separation stage and to process the solids into pulping product.2. The system of claim 1 , wherein the ensilage facility is configured for storing the crop long term for pulping production.3. The system of claim 1 , wherein the ensilage facility is configured for storing wet crop.4. The system of claim 1 , wherein the ensilage facility is further configured to compact the crop.5. The system of claim 1 , wherein the ensilage facility is further configured to enable long term storage without significant biological decay of organic compounds in the crop to exposure to oxygen while increasing sugar availability for purpose of energy production.6. The system of claim 1 , wherein the ensilage facility is further configured to enable long term storage of crop without exposure to molds and fungus.7. The system of claim 1 , wherein the crop is grass crop.8. The system of claim 1 , ...

Arrangement for feeding comminuted material using a plug screw feeder

A feeding arrangement for feeding comminuted material to a treatment stage using a plug screw feeder. The invention relates to a design of the inlet to the plug screw feeder wherein, at least 2 chutes ( 20 a, 20 b ) are arranged to feed material to the feed screw ( 10 ), and that the cross section of each chute is arranged such that more than 50% of the outlet cross section of a first chute ( 20 a ) is located on one side of the feed screw axis (CC) and more than 50% of the outlet cross section of a second chute ( 20 b ) is located on the other side of the feed screw axis. In an upgrade version for existing plug screw feeders with large rectangular inlets is an insert body ( 11 a ) used filling the rectangular inlet, besides the chutes ( 20 a, 20 b ) passing through the insert body ( 11 a ).

INTEGRATED METHOD AND SYSTEM FOR RECYCLING WASTE MATERIAL

Integrated methods and systems for recycling waste material including waste paper are provided, the methods including treating the waste material in the pressure vessel at an elevated processing temperature and an elevated processing pressure to form a treated waste material including a substantially re-pulped waste paper; discharging the treated waste material from the pressure vessel; and thereafter separating and diluting the treated waste material to dilute a portion including the substantially re-pulped waste paper to from about 1% to about 20% by weight solids. The recovered paper pulp fraction and substantially fiber-free recoverable/recyclable plastics and metals may be further separated and used as feedstock in a variety of subsequent processes. 1. A method for recycling waste material including waste paper comprising:introducing the waste material into a pressure vessel;treating the waste material in the pressure vessel at an elevated processing temperature and an elevated processing pressure to form a treated waste material including a substantially re-pulped waste paper;discharging the treated waste material from the pressure vessel; andthereafter separating the treated waste material with a screening device into a first portion and a second portion, the first portion comprising the substantially re-pulped waste paper and the second portion comprising large debris, wherein the step of separating further comprises washing the first portion through the screening device with an amount of water sufficient to dilute the first portion to from about 1% to about 20% by weight solids.2. The method of claim 1 , wherein the discharged treated waste material has a temperature from about 110 to about 220° F.3. The method of claim 1 , wherein the discharged treated waste material comprises solids present in the discharged treated waste material in an amount from about 5% to about 50% by weight of the discharged treated waste material.4. The method of claim 1 , wherein ...

SYSTEM FOR TREATMENT OF A BIOMASS MATERIAL

A system for treatment of a biomass material and a method for transporting biomass material, said system comprising: —a first vessel () in which said biomass material is treated at a first pressure;—a second vessel () in which said biomass material is collected at a second pressure which is lower than the first pressure; and—a transporting pipe () connecting an outlet () of the first vessel () with an inlet () of the second vessel () for transporting the biomass material from the first vessel to the second vessel, wherein said transporting pipe () comprises at least one restriction () for control of the flow in the transporting pipe and hereby providing a pressure drop to the transported biomass material, wherein at least one of said at least one restriction () is provided somewhere in the second half of the length of the transporting pipe () starting from the first vessel () and ending at the second vessel (). 2. A system according to claim 1 , wherein at least one of said at least one restriction is provided somewhere in the last 25% of the length of the transporting pipe starting from the first vessel and ending at the second vessel.3. A system according to claim 1 , wherein at least one of said at least one restriction is provided somewhere in the last 10% of the length of the transporting pipe starting from the first vessel and ending at the second vessel.4. A system according to claim 1 , further comprising a diffuser connected to an inlet of the second vessel and connecting the transporting pipe to the second vessel and wherein at least one of said at least one restriction is connected to said diffuser.5. A system according to claim 1 , wherein at least one of said at least one restriction is provided after a majority of bends claim 1 , elbows and junctions provided in the transporting pipe from the first vessel to the second vessel.6. A system according to claim 1 , wherein the first vessel is a reactor for pretreatment of a biomass material with steam or ...

Methods and apparatus for continuous enzymatic hydrolysis of pretreated biomass

Some variations provide an apparatus for enzymatically hydrolyzing pretreated lignocellulosic biomass, including at least one clarifying vessel comprising: an inlet well, disposed with walls at or near the top of the clarifying vessel, configured for continuously feeding pretreated lignocellulosic biomass; overflow weirs to allow liquid-phase hydrolysate to be continuously recovered from the clarifying vessel; and a controllable bottom outlet to allow a solid phase to be continuously or periodically recovered from the clarifying vessel. In certain embodiments, the clarifying vessel is an existing recausticizing clarifier in a pulp and paper mill. Other variations provide a method of enzymatically hydrolyzing pretreated lignocellulosic biomass, comprising: introducing pretreated lignocellulosic biomass to a clarifying vessel in the presence of cellulase enzymes, to hydrolyze the cellulose to a liquid-phase hydrolysate; separating, by sedimentation, the hydrolysate from the lignin; and recovering the hydrolysate from overflow weirs of the clarifying vessel.

Method for isolating alpha cellulose from lignocellulosic materials

The present invention involves an environmentally friendly process and apparatus for the delignification of lignin-containing materials, such as cardboard newspaper or agricultural or tree pruning wastes. This process produces cellulose using low temperatures and low concentrations of hydrogen peroxide. It can be performed using a column fitted with a semipermeable gasket that pressurizes the column by retaining oxygen released by action of the hydrogen peroxide on a lignin-containing material.

METHOD AND SYSTEM FOR PREPARING PULP FOR PAPER WITH GRASS STRAWS AS RAW MATERIAL

The present invention provides a method and a system for preparing pulp for paper with grass straws as raw material. The method of the present invention includes the following steps: 1) adding water in raw material for pulping, performing a first enzymolysis with ligninolytic enzyme; 2) cooking the first enzymolysis product at 80-130° C.; 3) performing second enzymolysis with hemicellulase to the cooked product. The method of the present invention is able to improve the pulp yield, reduce discharge of pollutants from black liquor, lower alkali consumption and energy consumption, and facilitate extraction of lignin and C-5 sugars, and pulp has a high quality. 1. A method for preparing pulp for paper with grass straws as raw material , comprising the following steps:1) adding water or recycled process water into a raw material for pulping to form a mixture, performing a first enzymolysis to the mixture with ligninolytic enzyme to obtain a first enzymolysis product;2) cooking the first enzymolysis product at a temperature of 80-130° C. to obtain a cooked product;3) performing a second enzymolysis to the cooked product with hemicellulase to obtain a second enzymolysis product.2. The method in accordance with claim 1 , further comprising step 4): performing dewatering to the second enzymolysis product to obtain a dewatered product claim 1 , and performing a third enzymolysis to the dewatered product with hemicellulase.3. The method in accordance with claim 1 , wherein claim 1 , in step 1) claim 1 , a mass ratio of the raw material for pulping to the water or recycled process water is 1:(5-10); enzyme activity of the ligninolytic enzyme is 8 claim 1 ,000-12 claim 1 ,000 U/g claim 1 , the amount of the ligninolytic enzyme is 0.05-0.2 kg per 100 kg of the mixture of the raw material for pulping and the water or recycled process water; and temperature of the first enzymolysis is 40-80° C. claim 1 , pH value is 5-8 claim 1 , and enzymolysis time is 0.5-4 h.4. The method in ...

PROCESSES AND SYSTEMS FOR THE PULPING OF LIGNOCELLULOSIC MATERIALS

A system and process of producing pulp from lignocellulosic material after the lignocellulosic material has undergone compression (pressurization), maceration and removal of extractives produced during compression and maceration followed by chemical addition, fiberization, digestion (cooking) and further mechanical refining. 1. A lignocellulosic material semi-chemical pulping process comprising:accepting lignocellulosic material in a compression, maceration and chemical addition step to form a compressed, macerated and impregnated lignocellulosic material;feeding the compressed, macerated and impregnated lignocellulosic material to a digester step, wherein the digester step comprises a digester vessel configured to receive the compressed, macerated and impregnated lignocellulosic material;heating the digester vessel and the compressed, macerated and impregnated lignocellulosic material within the digester vessel to a digesting temperature; andmaintaining the digesting temperature for a time to produce digested lignocellulosic material; and feeding the digested lignocellulosic material to a further processing step, wherein the further process step does not include a fiberizing step prior to the digester step.2. The lignocellulosic material semi-chemical pulping process of claim 1 , wherein the compression claim 1 , maceration and chemical addition step is achieved in a screw plug feeder.3. The lignocellulosic material semi-chemical pulping process of claim 1 , wherein the digested lignocellulosic material undergoes mechanical refining in the further processing step.4. The lignocellulosic material semi-chemical pulping process of claim 1 , wherein the digested lignocellulosic material undergoes washing in the further processing step.5. The lignocellulosic material semi-chemical pulping process of claim 1 , wherein the digested lignocellulosic material undergoes bleaching in the further processing step.6. The lignocellulosic material semi-chemical pulping process of ...

Digester with improved vapor control

A digestion apparatus is provided that include a vessel, a closure, and a fluid-transporting system. The vessel has a digestion chamber therein and an opening that provides access to the digestion chamber. The closure is adapted to interface with the vessel opening to form a fluid-tight seal against a digestion pressure and temperature within the chamber. The fluid-transporting system is adapted to direct fluid out of the digestion chamber back into the digestion chamber through an inlet port. A fluid transfer line may be interfaced with the closure, the line comprising a flexible hose and a quick-disconnect fitting, the fitting comprised of first portion associated with a self-sealing valve and a second portion that when mated downstream from the first portion allows fluid flow from the digestion chamber through the fitting.

SHORT OXYGEN DELIGNIFICATION METHOD

A short oxygen delignification method employs a mixing assembly including a mixing chamber having an interior wall which is generally symmetrical about a central longitudinal axis. At least one inlet is used to introduce paper pulp, a basic compound, optional steam and an oxygen-containing gas into the mixing chamber. At least one axial baffle is connected to and extends along the interior wall. At least one transverse baffle is connected to and extends from the interior wall transverse to the axis. A rotatable agitator includes at least one agitator baffle extending transverse to the axis at a location in alignment with a respective transverse baffle. This forms at least one gap between the at least one agitator baffle and the at least one respective transverse baffle. The paper pulp fluid is forced to travel through the at least one gap. A short delignification reaction occurs inside the mixing chamber. Delignified paper pulp fluid leaves the mixing chamber through at least one outlet of the mixing chamber. 2. The method of wherein said at least one inlet includes at least one gas inlet claim 1 , including directing said oxygen-containing gas through said at least one gas inlet into said mixing chamber.3. The method of wherein said flowable material includes steam.4. The method of wherein a residence time of said flowable material in said mixing chamber is not more than 2 minutes.5. The method of wherein paper pulp in said delignified paper pulp mixture passing through the at least one said outlet exhibits at least a 50% reduction in kappa number compared to paper pulp in said fluid flowing through the at least one said fluid inlet.6. The method of comprising passing said flowable material tangentially through the at least one said inlet into said mixing chamber.7. The method of comprising passing said delignified paper pulp mixture tangentially through the at least one said outlet from said mixing chamber.8. The method of comprising providing a venturi upstream ...

SCREEN FEED ARRANGEMENT

A screen feed arrangement for a pulp production process, comprising a discharge tank having an outlet, which is connected to an inlet of a discharge tank pump having an outlet, a dilution tank having an outlet, a screen feed pump having an inlet and an outlet, and a screening arrangement, wherein the outlet of the discharge tank and the outlet of the dilution tank are connected to the inlet of the screen feed pump, the outlet of which is connected to the screening arrangement, and that pulp which passes the outlet of the discharge tank has a mass concentration from about 8% to about 15%. A corresponding method for feeding pulp to a screen feed arrangement is also presented. 17.-. (canceled)8. A screen feed arrangement for a pulp production process , comprising a discharge tank having an outlet , which is connected to an inlet of a discharge tank pump having an outlet , a screen feed pump having an inlet and an outlet , and a screening arrangement , which outlet of the screen feed pump is connected to the screening arrangement , the outlet of the discharge tank being configured for discharge of pulp having a mass concentration from about 8% to about 15% ,characterized by a dilution tank having an outlet, and in that the outlet of the discharge pump and the outlet of the dilution tank are via a three-way pipe connected to the inlet of the screen feed pump.9. The screen feed arrangement according to claim 8 , characterized in that there is no dilution of the pulp in the discharge tank.10. The screen feed arrangement according to claim 8 , characterized in that there are no agitators arranged in the discharge tank.11. The screen feed arrangement according to claim 8 , characterized in that the discharge tank pump is a pump which is capable of pumping pulp having a mass concentration of about 8-15%.12. The screen feed arrangement according to claim 8 , characterized in that the discharge tank has an inlet claim 8 , which is connected to a digester.13. The screen feed ...

Paper Processing Device

This invention discloses a paper processing device, comprising a bottom block, a connecting cavity fixedly arranged in the bottom block, a penetrating cavity communicated with and arranged in the lower end wall of the connecting cavity. The penetrating cavity is communicated with the exterior space. A lifting motor is fixedly arranged in the lower end wall of the connecting cavity, the upper end wall of output shaft of which is fixedly provided with a driving pulley. A driven pulley in the connecting cavity is arranged on one side of the driving pulley. The lifting motor works to drive the driving pulley to rotate to drive the driven pulley to rotate, so an inner threaded block is driven to rotate to drive a threaded rod to move upwards; then a stirring fan is driven to enter a reaction cavity. The automatic structure adopted by this device realizes automation of paper processing. 1. A paper processing device , comprising:a bottom block;a connecting cavity fixedly arranged in said bottom block;a penetrating cavity communicated with and arranged in a lower end wall of said connecting cavity,wherein said penetrating cavity is communicated with the exterior space;a lifting motor fixedly arranged in the lower end wall of said connecting cavity,wherein an upper wall of output shaft of said lifting motor is fixedly provided with a driving pulley,wherein a driven pulley in said connecting cavity is arranged on one side of said driving pulley,wherein an inner threaded block is fixedly arranged in said driven pulley, and said inner threaded block is rotatably penetrating through an upper end wall of said connecting cavity and extends into the exterior space,wherein a threaded rod is arranged in and in threaded fit connection with said inner threaded block, and said threaded rod extends into said penetrating cavity, and an upper end face of said threaded rod is rotatably provided with a lifting plate,wherein a lower end face of said lifting plate is fixedly provided with ...

CONTINUOUS DIGESTER AND FEEDING SYSTEM

One embodiment provides an apparatus for cooking lignocellulosic material, comprising a pressurizable, inclined top separator including a sluicing liquor inlet for receiving a sluicing mixture comprising impregnated lignocellulosic material and sluicing liquor, a hot black liquor inlet, an excess liquor outlet, and an impregnated lignocellulosic material outlet; a continuous digester vessel including an impregnated lignocellulosic material inlet in communication with the impregnated lignocellulosic material outlet, and a warm black liquor outlet; and a black liquor circulation and heating loop including a warm black liquor inlet in communication with said warm black liquor outlet, a heater for heating warm black liquor to produce hot black liquor, and a hot black liquor outlet in communication with said hot black liquor inlet. Methods of making and using the apparatus are also provided. 1. An apparatus for cooking lignocellulosic material , comprising:a pressurizable, inclined top separator including a sluicing liquor inlet for receiving a sluicing mixture comprising impregnated lignocellulosic material and sluicing liquor, a hot black liquor inlet, an excess liquor outlet, and an impregnated lignocellulosic material outlet;a continuous digester vessel including an impregnated lignocellulosic material inlet in communication with the impregnated lignocellulosic material outlet, and a warm black liquor outlet; anda black liquor circulation and heating loop including a warm black liquor inlet in communication with said warm black liquor outlet, a heater for heating warm black liquor to produce hot black liquor, and a hot black liquor outlet in communication with said hot black liquor inlet.2. The apparatus of claim 1 , wherein the inclined top separator further comprises one or more of a screen or screw and is adapted to separate impregnated lignocellulosic material from at least a portion of sluicing liquor.3. The apparatus of claim 1 , wherein the inclined top ...

FEEDING SYSTEM HAVING PUMPS IN PARALLEL FOR A CONTINUOUS DIGESTER

The feed system is for a continuous digester where at least two pumps are arranged in parallel at the bottom of a pre-treatment vessel and a stirrer is provided in direct connection to inlets to pumps. The system makes it possible to provide a feed system with an improved accessibility and operational reliability, and to operate the main part of the pumps at optimal efficiency even if the production capacity is reduced. 1. A method for feeding wood chips to a continuous digester , comprising ,feeding wood chips into a vessel having a rotatable bottom scraper at a bottom of the vessel,suspending the wood chips in the vessel to create a chips suspension;arranging at least two single pumps in parallel connected directly to the bottom of the vessel, the two single pumps having no pump serially connected thereto upstream or downstream thereof,the bottom scraper rotating to break up a column of chips descending in the vessel,a stirrer, in operative engagement with the bottom scraper, sweeping over outlets at the bottom of the vessel to keep the chips suspension in motion and substantially evenly distributing the chips suspension between the outlets in communication with the two pumps,each pump transferring the chips suspension in a transfer line extending from the vessel to the top of a digester,cooking the wood chips in the digester to form a pulp, andcontinuously feeding out pulp from a bottom of the digester.2. The method for feeding wood chips according to wherein at least three pumps transfer the chips suspension to the top of the digester.3. The method for feeding wood chips according to wherein at least four pumps transfer the chips suspension to the top of the digester.4. The method for feeding wood chips according to wherein the method further comprises connecting the pumps circumferentially claim 2 , symmetrically and in a horizontal plane to the bottom of the vessel.5. The method for feeding wood chips according to wherein each transfer line is provided with an ...

SYSTEM AND CHIP CHUTE FOR FEEDING COMMINUTED CELLULOSIC MATERIAL

The invention relates to a chip chute () which comprises an elongated, open main body () having a rectangular transverse cross-section, and comprises further a transition portion (), which connects to the elongated, open main body () and comprises a circular outlet (). The invention relates further to a feeding system () for transporting comminuted lignocellulosic material from a vessel () to a pump () located below the vessel (), wherein such a chip chute () is arranged between the vessel () and the pum (). 112321. A feeding system () for transporting comminuted lignocellulosic material from a vessel () to a pump () located below the vessel () , said feeding system () comprising:{'b': 5', '2, 'a chip transfer arrangement () arranged in or at a bottom portion of the vessel () and'}comprising a rectangular outlet opening;{'b': '3', 'a circular inlet provided in the pump (); and'}{'b': 4', '5', '3', '4', '21', '31', '41', '22', '32', '42', '5', '23', '33', '43', '26', '36', '46', '3', '23', '33', '43', '22', '32', '42', '23', '33', '43', '22', '32', '42, 'a chip chute () arranged between the chip transfer arrangement () and the pump (), wherein the chip chute (; ; ; ) comprises an elongated, open main body (; ; ) having a height (H) and a rectangular transverse cross-section with a cross-section area and being connected to the rectangular outlet opening of the chip transfer arrangement (), and a transition portion (; ; ), which comprises a circular outlet (; ; ), which is connected to the circular inlet of the pump (), wherein the cross-section area is constant over the height (H) or increases in a direction towards the transition portion (; ; ) in at least a portion of the main body (; ; ), and characterized in that the transition portion (; ; ) has a height (h), which is less than 50% of the height (H) of the main body (; ; ).'}2223242223242223242. The feeding system according to claim 1 , characterized in that the height (h) is less than 30% of the height (H) of ...

METHOD AND APPARATUS FOR BURNING ODOR GAS

A method for burning primary fuel (F), wherein the primary fuel (F) comprises at least a first compound containing nitrogen and a second compound comprising sulfur. The method comprises producing primary combustion gas (G) having a temperature of at least 450° C. and comprising oxygen; feeding the primary fuel (F) and the primary combustion gas (G) to a primary process zone (Z) of a furnace (); feeding tertiary combustion gas (G) to a secondary process zone (Z) of the furnace (); letting the primary fuel (F), the primary combustion gas (G), and/or their reaction products to move from the primary process zone (Z) via the secondary process zone (Z) to a tertiary process zone (Z) of the furnace (); and feeding quaternary combustion gas (G) comprising oxygen to the tertiary process zone (Z) of the furnace (). An embodiment comprises collecting the primary fuel (F) from a pulp process. A corresponding system. 117-. (canceled)18. A method for burning primary fuel , wherein the primary fuel comprises at least a first compound containing nitrogen and a second compound comprising sulfur , the method comprising:producing primary combustion gas having an oxygen content from 7 vol % to 19 vol % by burning a tertiary fuel,feeding the primary fuel and the primary combustion gas to a primary process zone of a furnace,feeding tertiary combustion gas to a secondary process zone of the furnace,letting at least one of the primary fuel, the primary combustion gas, or their reaction products move from the primary process zone via the secondary process zone to a tertiary process zone of the furnace,feeding quaternary combustion gas comprising oxygen to the tertiary process zone of the furnace,producing such primary combustion gas that has a temperature of at least 450° C., anddelivering the primary combustion gas to the primary process zone by means of a compressor or a fan.19. The method of claim 18 , wherein an oxygen content of the quaternary combustion gas is higher than an oxygen ...

FEEDING ARRANGEMENT

A feeding arrangement comprising a transportation means () for transportation of material from a material supply to at least a first chute () and a second chute (), a plug screw feeder () for feeding the material to the treatment stage. The plug screw feeder () is provided with a first inlet opening () connected to the first chute (), which first chute () is provided between the transportation means () and the plug screw feeder (). Further, the transportation means () comprises at least selectively openable first and second outlets () arranged at different axial positions along the transportation means (), which first outlet () is in connection with the first chute () and the second outlet () is in connection with the second chute (). 1. A feeding arrangement for feeding comminuted cellulose material to a treatment stage , the feeding arrangement comprisinga transportation means for transportation of material from a material supply to at least a first chute or a second chute,a plug screw feeder for feeding the material to the treatment stage,the plug screw feeder is provided with a first inlet opening connected to the first chute, which first chute is provided between the transportation means and the plug screw feeder,the second chute is provided between the transportation means and the plug screw feeder,the plug screw feeder is provided with a second inlet opening in feeding communication with the second chute,further the transportation means is located above the plug screw feeder,characterized in that the transportation means comprises selectively openable first and second outlets arranged at different axial positions along the transportation means, which first outlet is in connection with the first chute and the second outlet is in connection with the second chute wherein said first chute is substantially vertically arranged so the material is gravity fed through the first chute and said second chute is in feeding connection with a force feed screw arranged to ...

DIGESTER APPARATUS

A digester apparatus is provided for delignifying wood chips to form wood pulp comprising: a vessel, a first downcomer, an outer fluid supply downcomer and structure defining an insulating region between the first and outer downcomers. The first downcomer extends into the vessel for delivering a first fluid into the vessel. The first fluid is generally at a first temperature when passing into the first downcomer. The outer fluid supply downcomer extends into the vessel and may be located about the first downcomer for supplying a second fluid into the vessel. The second fluid may be generally at a second temperature different from the first temperature when passing into the outer downcomer. The structure defining an insulating region between the first and outer downcomers functions to reduce heat transfer between the first and outer downcomers. 1. A digester apparatus for delignifying wood chips to form wood pulp comprising:a vessel;a first downcomer extending into said vessel for delivering a first fluid into said vessel, the first fluid being generally at a first temperature when passing into said first downcomer;a second downcomer extending into said vessel and located about said first downcomer;a third downcomer extending into said vessel and located about said second downcomer for delivering a second fluid into said vessel, the second fluid being generally at a second temperature different from the first temperature when passing into said third downcomer; andstructure for preventing continuous liquid flow through said second downcomer such that said second downcomer defines an insulating region between said first and third downcomers so as to reduce heat transfer between said first and third downcomers.2. The digester apparatus as set out in claim 1 , wherein:said first downcomer is defined by a first pipe extending into said vessel;said second downcomer is defined by an outer surface of said first pipe and an inner surface of a second pipe; andsaid third ...

BIOMASS, THERMAL PRESSURE HYDROLYSIS AND ANAEROBIC DIGESTION

A process is provided for preparing a low density, fibrous primary lignocellulose biomass, particularly straw for anaerobic digestion at large scale, i.e. >2 MW, which comprises a step that greatly increasing the density of the straw through size reduction, moisture adjustment and compression ahead of loading and subsequent agitation of the resultant biomass in a pressure vessel through an atmosphere of saturated steam providing heat for thermal-pressure hydrolysis and recovering treated biomass from the vessel. The primary lignocellulose biomass may be prepared in admixture with secondary biomass which may be manure-based. There is also provided a feedstock for anaerobic digestion comprising a fibrous primary lignocellulose biomass in a finely divided state, a secondary biomass providing anaerobically digestible nitrogen and aqueous liquid, the primary biomass having a disrupted cellular structure such that its inherent buoyancy in aqueous liquid is lost and digestible carbon is released and the mixture being in the form of an aqueous slurry in a sterilized state. The feedstock after thermal pressure hydrolysis may be anaerobically digested e.g. by wet mesophilic anaerobic digestion to achieve a high unit throughput and biomethane output thus allowing the deployment of the system at large scale within the anaerobic digestion industry. 1. A process of preparing a biomass for anaerobic digestion , which comprises:providing the biomass in a finely divided state, the biomass being a primary fibrous lignocellulose biomass;{'sup': '3', 'compressing the biomass and adding water and/or organic slurry to the biomass to form a feed batch having a bulk density of ≥350 kg/m;'}{'sup': '3', 'introducing the feed batch into a pressure vessel wherein the feed batch contains >125 kg of the primary lignocellulose per m;'}introducing an atmosphere of saturated steam into the pressure vessel and maintaining the saturated steam atmosphere at 133-220° C. and 3-10 bar whilst circulating ...

System for treatment of a biomass material and a method for connecting a valve to a transporting pipe

A system for treatment of a biomass material, said system comprising: a first vessel ( 3 ) in which said biomass material is treated under a first pressure; a second vessel ( 5 ) in which said biomass material is received and held at a second pressure which is lower than the first pressure; a transporting pipe ( 7 ) connecting an outlet ( 9 ) of the first vessel ( 3 ) with an inlet ( 11 ) of the second vessel ( 5 ) for transporting the biomass material from the first vessel to the second vessel; and a valve ( 15; 15′; 15 ) arranged in said transporting pipe ( 7 ), said valve being configured for controlling the flow of biomass material and fluid in the transporting pipe ( 7 ), wherein said transporting pipe ( 7 ) is asymmetrically connected to an outlet ( 33′; 33 ) of said valve ( 15; 15′; 15 ) such that a generated jet stream of biomass material delivered out from the outlet ( 33′; 33 ) of the valve ( 15; 15′; 15 ) is received closer to a transporting pipe longitudinal central axis (A 1 ) than if the outlet ( 33′; 33 ) of the valve ( 15; 15′; 15 ) and the transporting pipe ( 7 ) would have been connected symmetrically.

Method and apparatus for pumping sawdust feed in a sawdust pulping system

A method of producing chemical cellulose pulp from sawdust utilizing a static down-flow retention vessel comprising the steps of continuously pressurizing a flow of sawdust using a progressive cavity pump to produce a pressurized sawdust feed for a treatment vessel, passing the pressurized sawdust feed at super-atmospheric pressure downwardly in the treatment vessel, adding treatment white black liquor to the treatment vessel, and treating the pressurized sawdust feed in the treatment vessel with treatment white black liquor to form a treated sawdust, and discharging treated sawdust from the treatment vessel.

A SCREW FEEDER

Disclosed is a screw feeder () comprising a pipe () enclosing a feed screw arranged on a rotatory shaft () running parallel with the length direction of the pipe (), said pipe () further comprising a number of dewatering holes (). The screw feeder () also comprises a number of anti-rotation bars () provided on, and extending along, the inside of said pipe (), said anti-rotation bars () protruding in a direction towards said feed screw (), and an inlet () for receiving a solid-liquid mixture arranged at a first end of said pipe (), and an outlet () arranged at a second end of said pipe () for discharging an at least partially dewatered solid from said pipe (). The pipe () includes at least one longitudinal pipe section () having a first peripheral zone () provided in the vertically lower area of said longitudinal pipe section () and provided with dewatering holes () but no anti-rotation bars () and a second peripheral zone () provided in the vertically upper area of said longitudinal pipe section () provided with anti-rotation bars (), the overall pipe profile of said pipe section () is composed of two differently shaped pipe profiles, a first pipe profile (P) and a second pipe profile (P), said first pipe profile (P) defining the shape of the first peripheral zone () and is a profile selected from a square shaped profile, a profile having a partly circular cross-section with a squashed end or a circle segment remove or a partly elliptically shaped profile, and the second pipe profile (P) defining the shape of the second peripheral zone (), where the shape of said first pipe profile (P) is selected to allow the outer edges of said feed screw () to remove material overlying said dewatering holes (), and where the shape of said second pipe profile (P) is selected so as to prohibit any contact between said outer edges of said feed screw () and the anti-rotation bars (). Also disclosed is a pipe for use in such a screw feeder. 1. A screw feeder comprising:a pipe ...

Method for cooling and detoxifying biomass

The present invention relates to an improved method and device for treating biomass in which thermally treated biomass is discharged from a pressurized reactor and introduced into a blow tank, wherein the absolute pressure in the blow tank is maintained below atmospheric pressure. The slurry of biomass separated in the blow tank is then enzymatically treated. 1. A method for treating biomass comprising the steps of(a) feeding lignocellulosic biomass to a pressurized reactor;(b) supplying steam to the pressurized reactor and at least partially condensing said steam in the pressurized reactor;(c) hydrolysing hemicellulose sugars of said biomass with said at least partially condensed steam in the pressurized reactor;(d) discharging said hydrolyzed biomass from the pressurized reactor into a blow tank by steam explosion to produce steam exploded biomass;(e) diluting the steam exploded biomass in the blow tank with an aqueous diluent to a pumpable slurry; discharging the pumpable slurry from the blow tank as discharged pumpable slurry stream; 'withdrawing a vaporous aqueous stream from the blow tank for maintaining the absolute pressure in said blow tank below atmospheric pressure.', '(f) treating the discharged pumpable slurry stream with an enzyme, characterized by'}2. The method of claim 1 , wherein the absolute pressure in the blow tank is maintained below 0.5 bar (a).3. The method of claim 2 , wherein the absolute pressure in the blow tank is maintained below 0.3 bar (a).4. The method of claim 2 , wherein the absolute pressure in the blow tank is maintained at from 0.01 to 0.25 bar (a).5. The method of claim 1 , wherein the aqueous diluent is obtained from a downstream process claim 1 , e.g. a wash filtrate from enzymatic treatment or a condensate from ethanol rectification.6. The method of claim 1 , wherein the temperature of the aqueous diluent is higher than the temperature of the pumpable slurry in said blow tank.7. The method of claim 1 , wherein the pressure ...

Methods for digestion of cellulosic biomass solids in the presence of a phenolic solvent generated in situ from lignin

Digestion of cellulosic biomass solids can be enhanced in the presence of a phenolic solvent. Methods for digesting cellulosic biomass solids can comprise providing cellulosic biomass solids in a digestion medium comprising water and an organic solvent; heating the cellulosic biomass solids and the digestion medium in a digestion unit in the presence of molecular hydrogen and a slurry catalyst capable of activating molecular hydrogen, thereby forming an alcoholic component and liberating lignin, the lignin forming a phenolics liquid phase partitioned from the digestion medium and at least a portion of the slurry catalyst accumulating in the phenolics liquid phase; removing at least a portion of the phenolics liquid phase and accumulated slurry catalyst from the digestion unit; converting at least a portion of the phenolics liquid phase into a phenolic solvent; and returning at least a portion of the phenolic solvent and the slurry catalyst to the digestion unit.

Used paper diaper processing method and apparatus

A processing liquid is generated by mixing a chemical and water in a processing liquid generation region disposed below an inner tank. By further supplying water to raise a water level, the processing liquid is supplied from below the inner tank. This prevents a used paper diaper from coming into contact with water containing no chemical.

Method and system for efficient production of dissolving pulp in a kraft mill producing paper grade pulp with a continuous type digester

A method and system for pulp manufacturing used in connection with a kraft process includes a vertical pressure vessel operated in batch mode, a single-vessel or multi-vessel continuous digester, and other equipment for further processing brown stock, such as for washing, oxygen delignification, bleaching, and drying. A feeder and conveyance system may include a high pressure feeder or direct pump system, and selectively provides fiber-containing material to the continuous digester when making lower grade pulp product and to the vertical pressure vessel when making higher grade pulp such as dissolving pulp. The vertical pressure vessel is used for pre-hydrolysis and neutralization, after which the resulting pulp is fed to the continuous digester for cooking. White liquor and black liquor from the same mill may be used for the neutralization fluids. The same continuous digester is selectively used for cooking in connection with making pulp products of different grades or quality.

PROCESS AND SYSTEM FOR PRODUCING PULP, ENERGY, AND BIODERIVATIVES FROM PLANT-BASED AND RECYCLED MATERIALS

The presently disclosed subject matter relates to an industrial system for processing various plant materials to produce marketable materials. Particularly, the system integrates subcritical water extraction technology and includes a pre-processing module and a two-stage extractor (processing module) with constant control of temperature, pressure, and/or residence time. In some embodiments, the final product of the disclosed system can include feedstock constituents for biofuel production (sugars and/or oil), biochar, raw materials for various industries (such as pulp for manufacturing paper or cellulose for use in various industries). The disclosed system can be modular or non-modular, stationary or mobile, and can include prefabricated elements with programmed automatic or manual operation so that it can be easily moved and/or assembled on site. 1. (canceled)2. A method of producing pulp comprising:processing a feedstock into a processing size; andusing a subcritical water treatment process, treating the feedstock with a catalyst that comprises an alkaline catalyst at a concentration of about 1.5 to 10 weight percent or less in a reactor assembly having:an operating condition at a pressure and a temperature at a constant level that is held for a defined period of time to break down carbohydrates of a first chain strength to produce a pulp product.3. The method of claim 2 , wherein the feedstock comprises one or more of seeds and agricultural crop wastes and residues such as corn stover claim 2 , wheat straw claim 2 , rice straw claim 2 , sugar cane bagasse claim 2 , and hemp.4. The method of claim 2 , wherein the feedstock comprises hemp.5. The method of claim 2 , wherein the method provides for continuous flow of material through the reactor such that the process provides for continuous manufacture of paper pulp product claim 2 , cellulose claim 2 , or combinations thereof.6. The method of claim 2 , wherein the method is modular and scalable claim 2 , stationary ...

CONTINUOUS PILOT SCALE HYDROTHERMAL HORIZONTAL REACTOR DESIGN FOR MAKING INDUSTRIAL BY-PRODUCTS

The presently disclosed subject matter relates to a horizontal reactor system that can be used for processing various plant material biomass to produce fermentable carbohydrates, paper and pulp products, or both. Particularly, the disclosed system comprises a horizontal reactor vessel comprising a body with first and second ends. The reaction vessel is intended to encompass and retain a reaction medium (i.e., biomass slurry) that is to undergo a biological and/or biochemical reaction. The vessel comprises an internal agitator that functions to mix the contents of the reactor. The agitator is powered by a drive, which can be a motor, positioned outside the reaction vessel. 1. A horizontal bioreactor apparatus comprising:a horizontal reaction vessel comprising an interior and first and second ends;a first hub positioned at the first end of the vessel;a second hub positioned at the second end of the vessel; and a central rotating bore operably connected to the first and second hubs; and', 'one or more arms connected to the central rotating bore and operably connected to the first and second hubs., 'an agitator positioned within the interior of the vessel, the agitator comprising2. The apparatus of claim 1 , wherein the horizontal reaction vessel is constructed from stainless steel or a polymeric material.3. The apparatus of claim 1 , wherein the central rotating bore is coupled to an external drive device via the first or second hub.4. The apparatus of claim 3 , wherein the external drive device is a motor.5. The apparatus of claim 1 , wherein the horizontal reaction vessel is capable of processing about 1-2 liters of biomass slurry per minute.6. The apparatus of claim 1 , wherein the horizontal reaction vessel can accommodate pressures of up to about 1 claim 1 ,550 psi.7. The apparatus of claim 1 , wherein the horizontal reaction vessel can accommodate temperatures of up to about 450° F.8. The apparatus of claim 1 , wherein the horizontal reaction vessel r is ...

Double alkali charging for chip impregnation

The invention relates to a method and an impregnation vessel where the bulk volume of impregnation liquor added is in form of hot black liquor having a residual alkali content. Hot black liquor is added in an upper central pipe supplying the hot black liquor as impregnation liquor and flashing off steam for driving off air from the comminute cellulose material. During this first steaming is the wood acidity released from the material and spent impregnation liquor with wood acidity content is withdrawn from an upper withdrawal screen to recovery, a lower withdrawal screen recirculates the remaining impregnation liquor to a second lower central pipe in order to equalize the alkali content well before the remaining retention time in the impregnation vessel. According to the invention is additional alkali added to the hot black liquor and the recirculated impregnation liquor respectively dependent on established alkali level in the liquor withdrawn from the upper withdrawal screen and the alkali level established below the lower withdrawal screen.

ARRANGEMENT AND SYSTEM FOR A TREATMENT PROCESS

A system for feeding lignocellulosic biomass material, comprising a pre-compressing stage for receiving biomass material and pre-compressing the material at a first pressure and a first compression ratio. A plug screw feeder receives the pre-compressed material and feeds the material against a second pressure and a second compression ratio, wherein the plug screw feeder includes a variable speed plug screw arranged in the plug screw feeder connected to a variable speed plug screw power source. 1. A system for feeding lignocellulosic biomass material , comprising:a pre-compressing stage for receiving biomass material and pre-compressing the material at a first pressure and a first compression ratio;a plug screw feeder for receiving the pre-compressed material and feeding the material against a second pressure and a second compression ratio, said plug screw feeder including a variable speed plug screw arranged in the plug screw feeder connected to a variable speed plug screw power source; andwherein the first compression ratio in the pre-compression stage is between >1 and <2 and the second compression ratio in the plug screw feeder is between 1-5.2. The system according to claim 1 , wherein the pre-compression stage is a force feed screw including a force feed cylinder and a variable speed force feed screw arranged in the force feed cylinder claim 1 , wherein a control arrangement controls the speed of the rotation of the variable speed force feed screw to a first RPM.3. The system according to claim 2 , wherein said control arrangement controls the speed of the rotation of the variable speed plug screw to a second RPM.4. The system according to claim 2 , wherein the first compression ratio in the force feed screw is in a range between >1 and <2 claim 2 , or in a range between 1-1.5 or preferably in a range between 1.05-1.4.5. The system according to claim 1 , wherein the second compression ratio in the plug screw feeder is in a range of 1-5 claim 1 , or in a range ...

A REACTOR VESSEL FOR BIOMASS MATERIAL

A reactor vessel () for biomass material, wherein said reactor vessel () is a pressurized reactor vessel, said reactor vessel being elongated and comprising: a substantially tubular vessel part (); two gables () connected one to each end () of the tubular vessel part (), hereby enclosing a vessel internal compartment (); and a material transporting screw () comprising a central shaft () provided within the vessel internal compartment () extending between the two gables () along a central axis (A) of the reactor vessel (), wherein said material transporting screw further comprises screw flight () provided around the shaft (), wherein said material transporting screw is configured for transporting the biomass material through the reactor vessel, wherein both gables () are inwardly dished. 2. A reactor vessel according to claim 1 , wherein the central shaft is supported by bearings mounted on the gables in each end such that it can rotate around its longitudinal axis and wherein the central shaft is protruding out through at least one of the gables claim 1 , wherein said central shaft further is arranged to be connected to a rotation device configured for rotating said central shaft around its longitudinal axis.3. A reactor vessel according to any one of the preceding claims claim 1 , wherein it further comprises:an inlet for receiving said biomass material into said vessel internal compartment, said inlet being provided centered to a first position, which is closer to a first end of said tubular vessel part than a second opposite end of said tubular vessel part; andan outlet for discharging said biomass material out from the vessel internal compartment after having passed through the vessel internal compartment, said outlet being provided centered to a second position which is closer to the second end than the first end of said tubular vessel part.412. A reactor vessel according to claim 3 , wherein said first position is provided at a first distance (d) from the ...

PLUG SCREW FEEDER, FEEDER ARRANGEMENT AND SYSTEM FOR TREATMENT OF LIGNOCELLULOSIC BIOMASS MATERIAL

A plug screw feeder () comprises a plug screw () with a thread () and a plug screw housing () surrounding the plug screw. The plug screw housing comprises an inlet opening () in a side of the plug screw and in a vicinity of a first axial end () of the plug screw. The plug screw is arranged for feeding lignocellulosic biomass material () from the inlet opening to a second axial end () of the plug screw when being rotated. The thread, in at least a part of an inlet section () of the plug screw, presents a jagged peripheral rim (A) with an inwards directed leading edge. The inlet section is defined as the section of the plug screw passing the inlet opening during rotation. A feeding arrangement and system for treatment of lignocellulosic biomass material comprising such a plug screw feeder is also disclosed. 1. A plug screw feeder for lignocellulosic biomass material , comprising:a plug screw with having a first axial end, a second axial end, and a thread;a plug screw housing having an inner surface surrounding said plug screw;said plug screw housing comprising an inlet opening in a side parallel to said plug screw and in a vicinity of said first axial end of said plug screw;wherein said plug screw is arranged for feeding lignocellulosic biomass material from said inlet opening to said second axial end, opposite to said first axial end, of said plug screw when being rotated;said thread, in at least a part of an inlet section of said plug screw, presenting a jagged peripheral rim;wherein said inlet section is the section of said plug screw passing said inlet opening during rotation;wherein said jagged peripheral rim, in said at least a part of said inlet section, comprises teeth; andwherein sections of said jagged peripheral rim, in said at least a part of said inlet section, have a surface normal having a radial component pointing inwards.2. The plug screw feeder according to claim 1 , wherein said jagged peripheral rim claim 1 , in said at least a part of said inlet ...

METHOD FOR GENERATION OF CLEAN STEAM IN A CONTINOUS DIGESTER SYSTEM

The invention relates to an improved method for generating clean steam in a digester plant of a chemical pulp mill. By feeding a steam-to-steam converter (SSC) with venting steam from a black liquor flash tank (FT) as well as venting steam from chip steaming (SV) could the volume of clean steam produced be increased by over 40-50%, and to such an extent that the volume of clean steam covers the needs for preheating of chips in the digester system also in severe operational conditions. The total consumption of clean steam from the steam net of the mill may be reduced and used for other purposes such as electricity production, which meets the requirements for converting the pulp mill to an environmental friendly pulp mill. 1. A method for generation of clean steam in a continuous digester system , where the continuous digester system comprisesa chip bin using clean steam for initial steaming of cellulose material fed to the chip bin in order to heat the cellulose material and reduce amount of air in the cellulose material flow;a steaming vessel using dirty steam for a subsequent steaming of the cellulose material fed to the steaming vessel and where a stream of vent gases are withdrawn from the steaming vessel containing at least a part of the bound air in the cellulose material fed to steaming vessel;slurrying means for slurrying the cellulose material that has been steamed to a desired concentration of solids in the slurry formed;transfer means for transferring and pressurizing the slurry to the top of at least one treatment vessel, wherein at least one zone of one treatment vessel contains a cooking zone kept at full cooking temperature;an extraction screen in or immediately following the cooking zone extracting at least spent cooking liquor kept at temperature in a range between full cooking temperature, said full cooking temperature kept in the range 135 to 175° C. at the most and 120° C. at the lowest if the spent cooking liquor is diluted with wash liquor added ...

REACTOR DISCHARGE

A method for continuous steam explosion discharge of a pressurised reactor for thermal treatment of lignocellulose biomasses. The steam explosion discharge is complete decoupled from the thermal treatment step and the loss of steam from the process is fully controlled without jeopardizing the mechanical disintegration of the lignocellulose material from the process. 115.-. (canceled)16. Method for processing lignocellulose materials , comprising:providing lignocellulosic material to a pressurized vessel;hydrothermally treating lignocellulosic material in said pressurized vessel with saturated or superheated steam;discharging hydrothermally treated lignocellulose material continuously from a pressurized vessel to a discharge chamber using a pressure sealing screw;adding steam to the discharge chamber for pressure control; anddischarging lignocellulose material and steam from the discharge chamber through a discharge nozzle at expansion of steam.17. Method according to claim 16 , wherein said treatment in the pressurized vessel is performed at a pressure of 5-30 bar claim 16 , and at a temperature of 160-240° C. for a duration of 1-20 minutes followed by continuous discharge of said material from said pressurized vessel.18. Method according to claim 16 , further including conveying a mixture of steam and biomass particles from the discharge nozzle to one or multiple cyclones and separating steam and volatile gases from steam exploded material.19. Method according to claim 16 , further including conveying a mixture of steam and biomass particle from the discharge nozzle to a centrifuge and separating steam and volatile gases from steam exploded material.20. Method according to claim 16 , further including adding a mineral acid claim 16 , for example sulfuric acid claim 16 , to the hydrothermal treatment process upstream or to the pressurized vessel.21. System for processing lignocellulose materials claim 16 , comprising:a pressurized vessel configured to perform ...

Controlling process gases

Biomass (e.g., plant biomass, animal biomass, and municipal waste biomass) is processed to produce useful intermediates and products, such as energy, fuels, foods or materials. For example, equipment, systems and methods are described that can be used to treat feedstock materials, such as cellulosic and/or lignocellulosic materials, in a vault in which hazardous gases are removed, destroyed and/or converted. The treatments are efficient and can reduce the recalcitrance of the lignocellulosic material so that it is easier to produce an intermediate or product, e.g., sugars, alcohols, sugar alcohols and energy, from the lignocellulosic material.

METHOD OF USING REACTOR VESSEL HAVING SINGLE CONVERGENCE SIDEWALL PLATES

A biomass processing method including: feeding biomass to an upper reactor inlet; adding liquor to the biomass to create a liquid level below an upper biomass level; treating the biomass; discharging the treated biomass from a bottom reactor outlet; as the biomass flows downward from the biomass upper level to the bottom outlet, moving the biomass between a plurality of pairs of support plates, wherein (i) the pairs of support plates are arranged at different elevations, (ii) the plates of each pair are mounted to sidewalls at a slope with respect to the sidewall that converges the plate inwardly towards an opposite plate along a downward direction, and (iii) each pair of plates converges along a single direction; increasing biomass compaction as the biomass flows between each pair of plates; rapidly releasing compressive forces on the biomass as the biomass flows pass lower edges on each pair of support plates. 1. A method to process biomass in a reactor vessel comprising:continuously feeding comminuted biomass to an upper inlet of the reactor vessel;continuously adding water or other liquor to the biomass such that a liquid level in the reactor vessel is substantially below an upper level of the biomass in the reactor vessel;treating the biomass in the reactor vessel;continuously discharging the treated biomass from a bottom outlet of the reactor vessel;as the biomass flows gradually and continuously downward in the reactor vessel from the upper level of the biomass to the bottom outlet, moving the biomass between a plurality of pairs of support plates, wherein (i) the pairs of support plates are arranged at different elevations in the vessel, (ii) the plates of each pair are mounted to a sidewall of the vessel at a slope with respect to the sidewall that converges the plate inwardly towards an opposite plate along a downward direction, and (iii) the convergence of each pair of plates is along a single direction of convergence;gradually increasing compaction of ...

SCREEN ASSEMBLY FOR PULP DIGESTERS AND OTHER TREATMENT VESSELS IN PULP PRODUCTION

A screen assembly for a digester, impregnation vessel or other treatment vessel for separation of cooking liquor or treatment liquor from lignocellulosic material, typically in a form of chips, in the production of chemical cellulose pulp, which screen assembly includes a plurality of screen panels () of woven wire mesh cloth and attachment device configured to attach the screen panels to a support frame of the digester or vessel. 1. A screen assembly for a digester , impregnation vessel or other treatment vessel for separation of cooking liquor or treatment liquor from lignocellulosic material in the production of chemical cellulose pulp , wherein the screen assembly comprises:a plurality of screen panels, wherein each of the screen panels include a screen formed of woven wire mesh cloth and the plurality of screen panels are configured to allow passage of the cooking liquor or the treatment liquor and retain the lignocellulosic material, andan attachment device configured to attach the plurality of screen panels to a support frame.2. The screen assembly according to claim 1 , wherein the attachment device includes side clamps claim 1 , an upper end clamp claim 1 , a lower end clamp claim 1 , fastening bolts or studs and a fastening plate for each panel.3. The screen assembly according to claim 1 , wherein the screen has openings claim 1 , wherein a width of each of the openings is in a range of 1 mm to −7 mm and a length of each of the openings is in a range of 1 mm to −50 mm.4. The screen assembly according to claim 1 , wherein the screen has openings which are square or rectangular openings which have a width of 1 mm-7 mm and a length of 1-50 mm claim 1 , typically 10 mm-50 mm.5. The screen assembly according to claim 1 , wherein the screen wire is round in cross section.6. A screen assembly according to claim 5 , wherein the screen wire has a diameter in a range of 0.5 mm to 7 mm.7. The screen assembly according to claim 1 , wherein the screen has rectangular ...

SYSTEMS AND METHODS TO PRODUCE TREATED CELLULOSE FILAMENTS AND THERMOPLASTIC COMPOSITE MATERIALS COMPRISING TREATED CELLULOSE FILAMENTS

A method and system to produce treated Cellulose Filaments (CF) and CF products are provided. Feedstock comprising CF in a water solution are mixed with a debonder to produce a mixed stream. The mixed stream is filtered yielding separate filtered and filtrate streams. The filtrate stream comprises at least a portion of the debonder. The filtered stream is dried to produce treated CF. The debonder is one of an alcohol, glycol ether, ester-containing quaternary ammonium salt, amido amine quaternary ammonium salt, disubstituted amide or a mixture thereof. The filtrate stream may be recycled. The mixed stream may be washed before filtering to remove debonder. A thermoplastic polymer-treated Cellulose filament composite material is formable by associating the treated CF with a thermopolymer such as polyolefin, polyurethane (PU), polypropylene (PP), polyester (PE), polylactic acid (PLA), polyhydroxyalkanoates (PHA), polyamide (PA), and ethylene vinyl acetate (EVA) or a mixture. 1. A method comprising:mixing a feedstock comprising Cellulose Filaments in a water solution with a debonder to produce a mixed stream, the debonder comprising one of an alcohol, glycol ether, ester-containing quaternary ammonium salt, amido amine quaternary ammonium salt, disubstituted amide or a mixture thereof; anddrying a filtered stream, comprising the Cellulose Filaments obtained from the mixed stream, to produce treated Cellulose Filaments.2. The method of claim 1 , wherein during mixing claim 1 , the debonder adsorbs to a surface of the Cellulose Filaments in a manner such that the debonder physically blocks hydroxyl groups on the surface of the Cellulose Filaments from contacting adjacent Cellulose Filaments claim 1 , thereby weakening the effects of hydrogen bonding between hydroxyl groups of adjacent Cellulose Filaments.3. The method of wherein the Cellulose Filaments in the feedstock comprise individual fine threads unraveled or peeled from natural cellulose fibers having a fibrillar ...

HEATING OF HYDRAULIC DIGESTERS

A method and system for heating a hydraulic digester, such as a single-vessel hydraulic digester, which has a top separator, a level of chips and a liquid phase above the level of chips. The method includes: a. entraining chips in liquor to produce a slurry having a first temperature, b. feeding the slurry of chips to the digester through the top separator, c. supplying direct steam to the liquid phase between the level of chips and the top separator to heat the slurry to a second temperature for the impregnation stage, wherein the steam is fed by using at least one steam injector having a plurality of steam discharge openings; and d. heating the slurry to a third temperature and cooking the chips in a cooking zone, and withdrawing the cooked pulp from the bottom of the digester.

PROCESS AND SYSTEM FOR PRODUCING PULP, ENERGY, AND BIODERIVATIVES FROM PLANT-BASED AND RECYCLED MATERIALS

The presently disclosed subject matter relates to an industrial system for processing various plant materials to produce marketable materials. Particularly, the system integrates subcritical water extraction technology and includes a pre-processing module and a two-stage extractor (processing module) with constant control of temperature, pressure, and/or residence time. In some embodiments, the final product of the disclosed system can include feedstock constituents for biofuel production (sugars and/or oil), biochar, raw materials for various industries (such as pulp for manufacturing paper or cellulose for use in various industries). The disclosed system can be modular or non-modular, stationary or mobile, and can include prefabricated elements with programmed automatic or manual operation so that it can be easily moved and/or assembled on site. 1. (canceled)2. A system comprising:a pre-processing portion having a mechanical processor/material handler for a preparation of feedstock material; andan extractor portion comprising a reactor or a reactor assembly to which feedstock and subcritical water is supplied, the reactor or reactor assembly having:a first operating condition at a first pressure and a first temperature at a constant level that is held for a first defined period of time to break down carbohydrates of a first chain strength,wherein the reactor assembly comprises an assembly of one or more reactors followed by one or more pressure control valves, heat exchangers for cooling down the outputs from the reactor, and separators to collect valuable materials from the water phase and consequently recycle the water.3. The system of claim 2 , wherein the reactor assembly comprises continuous-type reactors or batch-type reactors.4. The system according to claim 2 , further including:a high pressure pump for increasing a pressure in the system, wherein a variable speed and flow rate are provided;a pressure control valve for maintaining pressure in the first ...

METHOD OF AND AN ARRANGEMENT FOR TRANSFERRING A PROCESS LIQUID, AN INDUSTRIAL FACILITY AND A METHOD OF SIMPLIFYING THE LAYOUT OF SUCH

The present invention relates to a method of and an arrangement for transferring a process liquid from a washing and thickening device to a subsequent process stage. In accordance with an advantageous embodiment of the present invention, the method and the arrangement are applicable, for example, in transferring fibre suspensions or pulps from washing and thickening device to a subsequent process stage in pulp and paper making industry such that the dilution of pulp after a washing and thickening device is performed in a stand pipe () below the surface level control range.

ARRANGEMENT AND SYSTEM FOR FEEDING BIOMASS MATERIAL TO A TREATMENT PROCESS

A feeding arrangement for feeding lignocellulosic biomass material such as annual plant material towards a hydrolysis process includes at least one transportation device for transporting the biomass material towards the treatment process; and at least one tearing roll arranged at a predetermined distance from the at least one transportation device and being provided with tearing protrusion. The at least one tearing roll is arranged with a predetermined distance to the at least one transportation device to tear off parts of the transported material to provide a substantially continuous flow of material. 1. A feeding arrangement for feeding lignocellulosic biomass material towards a hydrolysis or pre-hydrolysis process , the feeding arrangement comprising:at least one transportation device for transporting the biomass material towards the hydrolysis or pre-hydrolysis process;at least one tearing roll arranged at a predetermined distance from the at least one transportation device and being provided with tearing protrusions, the at least one tearing roll being arranged with a predetermined distance to the at least one transportation device to tear off parts of the transported material; anda housing provided with an upper inlet opening for receiving the biomass material and a lower outlet opening for discharging the biomass material,wherein the at least one transportation device includes a first and a second revolving drum arranged in the housing, the first drum revolving in a first rotational direction and the second drum revolving in a second rotational direction for transporting the biomass material, wherein the first and second drums are provided with protrusions and wherein the first and second drums are arranged to co-rotate with respect to each other;wherein the at least one tearing roll is arranged in the housing below the first and second drums seen in a feeding direction of the biomass material, wherein the at least one tearing roll is arranged to tear off ...

PROFILE BAR SCREEN FOR DIGESTER VESSELS

The invention relates to an improved profile bar screen for draining treatment liquor from a suspension of comminuted cellulose material and treatment liquor in an essentially cylindrical digester vessel. According to the invention is a profile bar screen designed with horizontal support arches with integrated support shoulders only at the outer ends of the support arch which support shoulders rest against the inside of the vessel wall . The invention combines the techniques from self-supporting screens with support members of weaker screen designs, avoiding need to make any additional welds in the classified pressure vessel wall of the digester. Installation of new screens in compartments previously equipped with blind plates in checkered screen rows may be done quickly and at less costs during shorter down time of digester. 1. A profile bar screen for draining treatment liquor from a suspension of comminuted cellulose material and treatment liquor in an essentially cylindrical digester vessel having an outer wall , said profile bar screen being arranged inside the outer wall of the cylindrical digester vessel thereby forming a withdrawal chamber between the outer wall of the digester vessel and the profile bar screen , the profile bar screen comprising:vertical profile bar elements facing the suspension of comminuted cellulose material, said vertical profile bar elements arranged in parallel to each other and forming a withdrawal slot for treatment liquor between neighboring ones of said vertical profile bar elements; anda plurality of horizontal support arches having vertical mounting slots for mounting said vertical profile bar elements in said mounting slots, the plurality of horizontal support arches having integrated support shoulders resting against the inside of the outer wall of the cylindrical digester vessel, each of said plurality of horizontal support arches having only two of said integrated support shoulders located at each respective end of each of ...

Method And System For Producing Market Pulp And Products Thereof

Methods and systems are provided for producing market pulp which include treatment of pulp before pulp drying. An anionically charged compound and enzyme are used to treat pulp before pulp drying to improve pulp dewatering performance and efficiency in the production of market pulp. Market pulp products containing the treatment compounds are also described. 1. A method for producing market pulp , comprising:forming cellulosic particulates into pulp;adding at least one anionically charged compound and at least one enzyme to said pulp to provide treated pulp;mechanically dewatering said treated pulp to provide mechanically dewatered pulp; andthermally drying said mechanically dewatered pulp to form market pulp.2. The method of claim 1 , wherein at least part of said adding of said enzyme to said pulp occurs prior to said adding of said anionically charged compound to said pulp.3. The method of claim 1 , wherein about 80% to 100% by weight of said adding of said enzyme to said pulp occurs prior to said adding of said anionically charged compound to said pulp.4. The method of claim 1 , wherein the anionically charged compound is an organic anionically charged compound.5. The method of claim 1 , wherein the enzyme is a hydrolytic enzyme.6. The method of claim 1 , further comprising bleaching the pulp after the pulp forming and before the adding of the anionically charged compound and enzyme to said pulp.7. A method for producing market pulp claim 1 , comprising:forming cellulosic particulates into pulp;adding at least one anionic surfactant and at least one enzyme to said pulp to provide treated pulp;mechanically dewatering said treated pulp to provide mechanically dewatered pulp; andthermally drying said mechanically dewatered pulp to form market pulp.8. The method of claim 7 , wherein at least part of said adding of said enzyme to said pulp occurs prior to said adding of said anionic surfactant to said pulp.9. The method of claim 7 , wherein about 80% to 100% by weight ...

PROCESSES AND SYSTEMS FOR THE PULPING OF LIGNOCELLULOSIC MATERIALS

A system and process of producing pulp from lignocellulosic material after the lignocellulosic material has undergone compression (pressurization), maceration and removal of extractives produced during compression and maceration followed by chemical addition, fiberization, digestion (cooking) and further mechanical refining. 1. A lignocellulosic material semi-chemical pulping process comprising:feeding a lignocellulosic material to a compression and maceration step;compressing and macerating the lignocellulosic material to form a compressed and macerated lignocellulosic material;feeding the compressed and macerated lignocellulosic material to a fiberizer step, wherein the fiberizer step comprises feeding the compressed macerated lignocellulosic material through one or more fiberizers;fiberizing the compressed and macerated lignocellulosic material to form a fiberized material;transferring the fiberized material to a digester step, wherein the digester step comprises feeding the fiberized material into a digester vessel; andcontacting the fiberized material with cooking chemicals while the fiberized material is in the digester vessel, wherein the cooking chemicals initiate a de-lignification of the fiberized material.2. The lignocellulosic material semi-chemical pulping process of claim 1 , wherein prior to the feeding lignocellulosic material to the compression and maceration step claim 1 , the lignocellulosic material undergoes at least one of a washing claim 1 , dewatering claim 1 , and pre-steaming step.3. The lignocellulosic material semi-chemical pulping process of claim 1 , wherein the cooking chemicals are added to the process at a time selected of the group consisting of before the fiberizer step claim 1 , in the fiberizer step claim 1 , and after the fiberizer step.4. The lignocellulosic material semi-chemical pulping process of further comprising transferring the digested material to a further refining step claim 1 , wherein the further refining step ...

A method and a system for production of high molecular weight lignin

A cooking method and a digester system wherein partly digested cellulosic fiber source is compressed during cooking to provide high molecular weight lignin and pulp.

METHOD FOR PROCESSING STRAW

Described herein is a method for processing straw into an intermediate straw product. The method comprises: (a) treating straw with an alkaline solution having a p H of between about 10 and about 14, at a temperature of between about 20° C. and about 80° C., for a period of between about 6 hours and about 30 hours; (b) separating excess alkaline solution and the treated straw from each other; and (c) maintaining the treated straw in an anaerobic environment at a temperature of between about 30° C. and about 45° C., for a period of between about 6 hours and about 30 hours to produce an intermediate straw product. Also described is an intermediate product produced by the method; a method for extracting lignin from straw; lignin thereby produced; a method for extracting cellulose fibres from straw to produce paper pulp; cellulose fibres and paper pulp thereby produced; a method for producing a paper pulp product or a paper product; a product thereby produced; and a container and apparatus for processing straw according to the methods described. 1. A method for processing straw into an intermediate straw product , the method comprising:(a) treating straw with an alkaline solution having a pH of between about 10 and about 14, at a temperature of between about 20° C. and about 80° C., for a period of between about 6 hours and about 30 hours;(b) separating excess alkaline solution and the treated straw from each other; and(c) maintaining the treated straw in an anaerobic environment at a temperature of between about 30° C. and about 45° C., for a period of between about 6 hours and about 30 hours to produce an intermediate straw product.2. A method according to claim 1 , wherein the intermediate straw product can be further processed and/or refined into cellulose fibres useful for paper production.310-. (canceled)11. A method according to claim 1 , wherein before step (c) the method comprises removing air to produce an anaerobic environment.1213-. (canceled)14. A method ...

Method of and an arrangement for transferring a process liquid, an industrial facility and a method of simplifying the layout of such

The present invention relates to a method of and an arrangement for transferring a process liquid from a washing and thickening device to a subsequent process stage. In accordance with an advantageous embodiment of the present invention, the method and the arrangement are applicable, for example, in transferring fibre suspensions or pulps from washing and thickening device to a subsequent process stage in pulp and paper making industry such that the dilution of pulp after a washing and thickening device is performed in a stand pipe ( 18 ) below the surface level control range.

ARRANGEMENT AND SYSTEM FOR FEEDING BIOMASS MATERIAL TO A TREATMENT PROCESS

A feeding arrangement for feeding lignocellulosic biomass material such as annual plant material towards a hydrolysis process includes at least one transportation device for transporting the biomass material towards the treatment process; and at least one tearing roll arranged at a predetermined distance from the at least one transportation device and being provided with tearing protrusion. The at least one tearing roll is arranged with a predetermined distance to the at least one transportation device to tear off parts of the transported material to provide a substantially continuous flow of material. 112-. (canceled)13. A feeding arrangement for feeding lignocellulosic biomass material towards a hydrolysis or pre-hydrolysis process , the feeding arrangement comprising:at least one transportation device for transporting the biomass material towards the hydrolysis or pre-hydrolysis process;at least one tearing roll arranged at a predetermined distance from the at least one transportation device and being provided with tearing protrusions, the at least one tearing roll being arranged with a predetermined distance to the at least one transportation device to tear off parts of the transported material; anda housing provided with an upper inlet opening for receiving the biomass material and a lower outlet opening for discharging the biomass material,wherein the at least one transportation device includes a first and a second revolving drum arranged in the housing, the first drum revolving in a first rotational direction and the second drum revolving in a second rotational direction for transporting the biomass material, wherein the first and second drum is provided with protrusions and wherein the first and second drum are arranged to co-rotate with respect to each other,wherein the at least one tearing roll is arranged in the housing below the first and second drum seen in a feeding direction of the biomass material, wherein the at least one tearing roll is arranged to ...

Reactor arrangement and method for pre-hydrolysis of biomass material

A reactor arrangement for pre-hydrolysis of biomass material. The reactor arrangement comprises a reactor vessel arranged substantially horizontally, wherein the vessel comprises an inlet for receiving the biomass material arranged at an upper portion of the vessel. The inlet may be arranged at a first longitudinal end of the vessel. The vessel may furthermore comprise an outlet at a second longitudinal end of the vessel. The reactor arrangement further comprises a set of steam injection orifices arranged to inject or supply steam into the reactor vessel. The set of steam injection orifices comprises at least two orifices arranged below the inlet at a distance from each other. The at least two orifices may be arranged at a distance from each other in the lateral direction of the reactor vessel. Furthermore, a method for pre-hydrolysis treatment of biomass in a substantially horizontal reactor vessel is provided.

METHOD FOR PRODUCING PARENCHYMAL CELL CELLULOSE

A method for producing parenchymal cell cellulose by using a high consistency alkali treatment and an optional refinement step, as well as an apparatus for its manufacture. 1. A method for producing parenchymal cell cellulose comprising:1. Treating parenchymal cellulose raw material with an alkali2. Recovering a first solid extract3. Optionally washing the recovered first solid extract with a solvent and recovering a second solid extract;wherein the solids content of the first recovered solid extract and/or the recovered second solid extract comprising parenchymal cell cellulose is at least 8 wt-%, preferably 8-30 wt-% most preferably 8-15 wt-%.2. The method according to claim 1 , wherein the step 1 and/or step 2 and/or step 3 is/are conducted using a counter-current process.3. The method according to claim 1 , wherein the step 1 and/or step 2 and/or step 3 is/are conducted using a percolation process.4. The method according to claim 1 , wherein the step 1 and/or step 2 and/or step 3 is/are conducted using a continuous process.5. The method according to carried out using a concentrating screw conveyor.6. The method according to claim 1 , wherein the parenchymal cellulose raw material has claim 1 , in average claim 1 , at least one dimension having a length of at least 3 mm claim 1 , preferably 3 to 100 mm claim 1 , most preferably 3 to 30 mm claim 1 , during the step 1 claim 1 , and optionally during the step 3.7. The method according to comprising a bleaching and/or chemical modification step selected from oxidation claim 1 , cationization claim 1 , acetylation claim 1 , electrophilic substitution claim 1 , esterification claim 1 , and etherification claim 1 , the chemical modification step being carried out before claim 1 , during or after step 1 or 3.8. The method according to further comprising a concentrating step to increase concentration to above 8 wt-% claim 1 , preferably between 8-50 wt-% claim 1 , most preferably 10-25 wt-%.9. The method according to ...

DIGESTER SHELL EXTENSION

The invention relates to an improved design of the bottom of a continuous digester reducing the torque load on conventional bottom scrapers with scraper arms arranged at an angle α in relation to the horizontal plane in the range between 5°-30°. A simple digester shell extension VE is installed below the lowermost wash screen WS, ending at a small distance D above the end of the outer end of the scraper arm. The shell extension prevents the descending pulp column from expanding below the wash screen and enables easier shaving action from the scraper, using a dilution and expansion volume established at the outer ends of the scraper arms. 1. A continuous digester for producing delignified cellulosic material comprising:an outer digester shell designed for withstanding the pressure applied in the digester,a bottom with a central outlet for the delignified cellulosic material, anda bottom scraper including scraper arms with scraper blades, and a cone diverter driven by a rotating shaft, the scraper arms are angled at an angle α in relation to the horizontal plane in the range between 5°-30°, a wash zone in the digester bottom with nozzles (HN, VN, CP) adding wash or dilution liquid to bottom of digester and a wash screen (WS) located at a distance above the bottom scraper, with no other withdrawal screens between the scraper and the wash screen (WS), for withdrawing at least a part of the added wash or dilution liquid after a displacement trough the delignified cellulosic material, said distance providing for a wash zone having a retention time of 5-45 minutes of the delignified material, a wash extraction chamber (WEC) located behind the wash screen, and between the digester shell and the wash screen, said wash extraction chamber having an radial extension (A) as seen in the radial direction of the digester, below the wash screen (WS) is arranged an vertical extension (VE) of the interior digester wall down towards the end of the outer arm of the bottom scraper, said ...

Integrated method and system for recycling waste material

Integrated methods and systems for recycling waste material including waste paper are provided, the methods including treating the waste material in the pressure vessel at an elevated processing temperature and an elevated processing pressure to form a treated waste material including a substantially re-pulped waste paper; discharging the treated waste material from the pressure vessel; and thereafter separating and diluting the treated waste material to dilute a portion including the substantially re-pulped waste paper to from about 1% to about 20% by weight solids. The recovered paper pulp fraction and substantially fiber-free recoverable/recyclable plastics and metals may be further separated and used as feedstock in a variety of subsequent processes.

METHOD AND APPARATUS FOR CONTROLLING A CELLULOSIC PULP PROCESS

A method and apparatus for controlling a cellulosic pulp process for producing a pulp product having a desired pulp property is disclosed. The method involves illuminating an in-process portion of pulp using a first wavelength of light, and receiving a scattered light spectrum from the illuminated portion of pulp, the scattered light spectrum including spectral components that have been shifted in wavelength through interaction with a constituent of the illuminated portion of pulp. The method also involves filtering the scattered light spectrum to separate the spectral components, and identifying spectral features in the filtered scattered light spectrum that correspond to the pulp property. The method further involves generating a control signal for controlling the pulp process based on variations in the identified spectral features to cause the pulp property to fall within a desired range. 1. A method for controlling a cellulosic pulp process for producing a pulp product having a desired pulp property , the method comprising:illuminating an in-process portion of pulp using a first wavelength of light;receiving a scattered light spectrum from the illuminated portion of pulp, the scattered light spectrum including spectral components that have been shifted in wavelength through interaction with a constituent of the illuminated portion of pulp;filtering the scattered light spectrum to separate the spectral components;identifying spectral features in the filtered scattered light spectrum that correspond to the pulp property; andgenerating a control signal for controlling the pulp process based on variations in the identified spectral features to cause the pulp property to fall within a desired range.2. The method of wherein generating the control signal comprises generating a display signal for controlling a display to cause information associated with the pulp property to be displayed.3. The method of wherein generating the control signal comprises generating a ...

RAW-MATERIAL SUPPLY DEVICE AND BIOMASS SEPARATION DEVICE

A raw-material supply device for supplying a biomass raw material under pressure, wherein the device is provided with: a screw body, provided inside a screw feeder and adapted for compressing, rotating, and transporting the powdered biomass raw material using a motor from a normal-pressure feed section for the fed biomass raw material to a high-pressure discharge section; and a pressing plug provided on the tip section side of the screw body, the pressing plug having a plug tip for maintaining a high-temperature/high-pressure field against the discharge force of compressed consolidated biomass. The interior of the screw feeder comprises a raw-material feed region for feeding the biomass raw material in the raw-material transport direction, a raw-material compression region for compressing the biomass raw material, a raw-material consolidation region for consolidating the biomass raw material in the form of a cork, and a material seal section for maintaining the high-pressure field using the consolidated biomass. 1. A raw-material supply device for supplying a powder raw material under from normal pressure to increased pressure , comprising:a screw body that is provided inside a screw feeder and compresses, rotates, and transports a powder raw material using a drive means from a normal-pressure feed section for fed powder raw material to a high-pressure discharge section; anda pressing means that is provided on a tip section side of the screw body and maintains a consolidated body of raw material against a discharge force of consolidated raw material,an interior of the screw feeder comprising a raw-material feed region for feeding the powder raw material in a raw-material transport direction using a screw means,a raw-material compression region for compressing the powder raw material, a raw-material consolidation region for consolidating the powder raw material in a form of a cork, and a material seal section for maintaining a high-pressure field using a consolidated ...

Screw conveyor for lignocellulose-containing material

A screw conveyor for transporting lignocellulose-containing material is disclosed, including a housing containing a screw for transporting the lignocellulose-containing material from the inlet to the outlet of the housing, the screw including a screw core disposed along the screw axis and a screw thread surrounding the screw core, the screw thread including a screw depth defined by the distance between the periphery of the screw and the screw core, the inlet including at least one transverse plate dividing the inlet into at least two axial compartments for evenly distributing the lignocellulose-containing material at the inlet. A method for transporting lignocellulose-containing material by the screw conveyor is also disclosed, in which the axial length of the screw inlet being equal to or greater than the screw depth times the quotient between the axial speed of the screw and the incoming speed of the lignocellulose-containing material at the inlet.

METHOD FOR IMPREGNATING BIOMASS AND DEVICE FOR IMPREGNATING BIOMASS

The invention relates to a method for impregnating biomass (). In a step (S) of the method, a reactor unit () is fed with biomass () by means of a plug screw (). In another step (S), the reactor unit () is at least partially filled up to a predetermined fill level () with a reactant (), such that a reaction between the fed biomass () and the reactant () takes place in order to obtain an impregnated biomass. In another step (S), the impregnated biomass () is discharged from the reactor unit () for further processing (S). The invention further relates to a device () for impregnating biomass (). 110. A method for impregnating biomass () , the method comprising:{'b': 11', '10', '12', '100, 'feeding a reactor unit () with biomass () by means of a plug screw (, S);'}{'b': 11', '13', '18', '10', '18', '200, 'at least partially filling the reactor unit () up to a predetermined fill level () with a reactant (), such that a reaction between the fed biomass () and the reactant () takes place in order to obtain an impregnated biomass (S);'}{'b': 10', '11', '300, 'discharging the impregnated biomass () from the reactor unit () for further processing (S).'}2101012101120. The method for impregnating biomass () of claim 1 , further comprising compressing the biomass () by means of the plug screw () before feeding the biomass () into the reactor unit ( claim 1 , S).3101014101110. The method for impregnating biomass () of claim 2 , further comprising pre-compressing the biomass () by means of a force feed screw () before feeding the biomass () into the reactor unit ( claim 2 , S).41012. The method for impregnating biomass () of claim 2 , wherein the volumetric compression ratio during compression with the plug screw () is between 1.5 and 6.51010151110210. The method for impregnating biomass () of claim 1 , further comprising conveying the biomass () by means of at least one conveyor means () within the reactor unit () during impregnation of the biomass ( claim 1 , S). ...

Pressure chamber feeder

Massage apparatus

System for the conversion of biomass

When processing cellulosic biomass, it may be desirable for a digestion unit to operate without being fully depressurized for process efficiency purposes. A biomass conversion system can comprise a first digestion unit and a second digestion unit that are operatively connected to one another; a valve separating the first digestion unit from the second digestion unit; a fluid circulation loop establishing fluid communication between an outlet of the first digestion unit and an inlet of the second digestion unit; and a bypass line establishing fluid communication between an outlet of the second digestion unit and the fluid circulation loop.

Solid/fluid separation device and method for treating biomass including solid/fluid separation

A solid/fluid separation module and pretreatment apparatus and method enables pretreatment of biomass at high temperature and pressure with the ability to vary residence and processing times.

Method and apparatus for filling of fiber material and liquid to steam phase in treatment vessel

A method and apparatus for filling a treatment vessel, such as a digestor, with fiber material and liquid. A chips-liquid mixture from a pretreatment vessel is fed through a conventional feeding valve to a treatment vessel while the chips-liquid mixture is being acted on by other means in the feeding valve. The feeding valve includes a rotor having a number of pockets extending therethrough, and a plurality of inlets and outlets arranged around the periphery of the valve for communication with the pockets thereof. In a first position of the valve chips-liquid mixture is fed into a pocket, and a portion of the liquid is strained off, then the valve rotates to a second position wherein a quantity of the liquid is displaced by gas or steam while the chips are maintained in the pocket, and then the valve rotates to a third position wherein the chips in the pocket are discharged into the treatment vessel. After discharge of the chips into the treatment vessel the valve rotates to a fourth position wherein the steam in the pocket is discharged to a pretreatment vessel and the pocket is filled with liquid so that it is filled with liquid when it is rotated back to its first position.

Rotary valves

A material-handling valve particularly advantageous for use in processing fibrous materials, including a valve rotor having circumferentially spaced pockets defined by radially projected vanes, the trailing surfaces of which incorporate means defining radially oriented passages opening directly at the base of the related pocket. Means are provided to align with and direct steam to move inwardly of and through said passages to impact on the base of each rotor pocket, first as it approaches the valve outlet, thereby to load the pocket contents from the rear and to facilitate its discharge on exposure to the valve outlet, and to secondly scour said passages and the walls of each pocket on a full registration thereof with said outlet.

Rotary feed valve

Device for separation of solid particles or fluid medium and method of biomass processing involving separation of solid particles or fluid medium

FIELD: technological processes. SUBSTANCE: invention relates to device and method of biomass processing, involving separation of solid particles or fluid medium. Separation module comprises collecting chamber and filtering unit for separation of fluid medium from mass under pressure. Filtering unit has a central hole tightly isolated from the collecting chamber and comprises a filtering bag. Filtering bag consists of filter and support plates. Filter plate has filter through slit made along the whole thickness of the plate and extending from central hole to the filter plate to direct fluid medium from the central hole. Support plate directs fluid medium collected in filter slit into a collecting chamber. EFFECT: invention enables preliminary processing of biomass at high temperature and pressure with possibility to vary length of stay and treatment. 26 cl, 13 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 603 650 C2 (51) МПК C08H 8/00 (2010.01) B01D 25/00 (2006.01) C12P 7/10 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2013123644/05, 09.11.2011 (24) Дата начала отсчета срока действия патента: 09.11.2011 (72) Автор(ы): ЛЕХО Ричард Ромео (CA), БРАДТ Кристофер Брюс (CA) 09.11.2010 US 61/411,721 (43) Дата публикации заявки: 20.12.2014 Бюл. № 35 R U (73) Патентообладатель(и): ГРИНФИЛД СПЕШЕЛТИ ЭЛКОХОЛЗ ИНК. (CA) Приоритет(ы): (30) Конвенционный приоритет: (45) Опубликовано: 27.11.2016 Бюл. № 33 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 10.06.2013 (86) Заявка PCT: 2 6 0 3 6 5 0 (56) Список документов, цитированных в отчете о поиске: CA 2701407 A1, 23.10.2010. US 3807298 A, 30.04.1974. US 20090293742 A1, 03.12.2009. SU 1346051 A3, 15.10.1987. (87) Публикация заявки PCT: WO 2012/061942 (18.05.2012) R U 2 6 0 3 6 5 0 Адрес для переписки: 191036, Санкт-Петербург, а/я 24, "НЕВИНПАТ" (54) УСТРОЙСТВО ДЛЯ СЕПАРАЦИИ ТВЕРДЫХ ЧАСТИЦ/ТЕКУЧЕЙ СРЕДЫ И СПОСОБ ОБРАБОТКИ БИОМАССЫ, ВКЛЮЧАЮЩИЙ ...

Process for continuous solvent digestion

Vaetskefolievaermare.

System and method for preextraction of hemicellulose through using a continuous prehydrolysis and steam explosion pretreatment process

A system has been developed for pretreating cellulosic biomass feed stock including: a first pressurized reactor receiving the feed stock, wherein the feed stock undergoes hydrolysis in the first pressurized reactor; a sealing device having a first pressurized coupling to a feedstock discharge port of the first pressurized reactor, and a second pressurized coupling to a second pressurized reactor; a drain for a liquid including dissolved hemi-cellulosic material extracted from the feed stock in at least one of the first pressurized reactor and the sealing and extraction device; the second pressurized reactor assembly receiving the pressurized feed stock from the sealing device at a pressure substantially greater than the pressure in the first pressurized reactor, wherein cells of the feed stock are infused with water in the second pressurized reactor, and an expansion device downstream of the second pressurized reactor assembly, wherein the expansion device rapidly releases the pressure of the feed stock discharged from the second pressurized reactor such that the feed stock undergoes a steam explosion reaction.

Method and apparatus for conveying a cellulosic feedstock

A method and apparatus for preparing a cellulosic feedstock are disclosed. Embodiments of the method comprise passing the cellulosic feedstock out of at least one outlet of a vessel (such as a holding tank) and obtaining at least two streams of cellulosic feedstock wherein each stream may be fed different hydrolysis reactors. Embodiments of the apparatus comprise passing the cellulosic feedstock downwardly through the vessel and withdrawing the feedstock from the vessel in two different lateral directions.

Method and apparatus for conveying a cellulosic feedstock

A method and apparatus for preparing a cellulosic feedstock are disclosed. Embodiments of the method comprise obtaining a cellulosic feedstock having a moisture content of 30wt% to 60wt%; passing the cellulosic feedstock through a heated holding tank; withdrawing the cellulosic feedstock from the holding tank; and, subsequently subjecting the cellulosic feedstock to hydrolysis. Embodiments of the apparatus comprise at least one sidewall defining a volume having an upper portion and a lower portion. At least one inlet is provided adjacent the upper portion, and the inlet is in fluid communication with an impregnation chamber provided upstream from the holding tank. At least one outlet is provided adjacent the lower portion, and the outlet is in fluid communication with hydrolysis reactor positioned downstream from the holding tank. At least one conveyor is positioned adjacent the at least one outlet. A heating jacket provided on at least a portion of the apparatus.

Self-cleaning apparatus and method for thick slurry pressure control

Self-cleaning apparatus and methods are disclosed for handling viscous fluids, such as thick solid-liquid slurries of lignocellulosic biomass and its components, under high pressure, using an array of retractable valves.

Method and device for treating biomass

The invention relates to a method for treating biomass (2). Biomass (2) is fed to a pressurized prehydrolysis reactor unit (8) by means of a feeding system (5, 7), wherein by means of the feeding system (5, 7) the biomass (2) is compressed. A filtrate is squeezed out of the biomass (2) by means of the feeding system (5, 7), in particular by a first plug screw (5) or a second plug screw (7) of the feeding system (5, 7). The biomass (2) is then thermally treated in the pressurized prehydrolysis reactor unit (8), discharged from the pressurized prehydrolysis reactor unit (8) afterwards and treated with an enzyme subsequently.