СПОСОБ НЕПРЕРЫВНОГО ОСАЖДЕНИЯ ЛИГНИНА ИЗ ЧЕРНОГО ЩЕЛОКА

FIELD: chemistry. SUBSTANCE: invention relates to a method for continuous precipitation of lignin from black liquor, wherein pH of the black liquor is lowered to the lignin precipitation point and the precipitated lignin is separated from the black liquor. The black liquor is fed so as to flow as a pressurised stream in a reactor (2) with a dwell time of less than 300 s; an acidifying agent selected from a group consisting of carbon dioxide, an acid and combinations thereof is fed to the stream at one or more feeding points (2a) in order to lower the pH of black liquor; the pH is allowed to decrease under the effect of the acidifying agent in the pressurised stream to the lignin precipitation point; the pressure of the pressurised stream is abruptly released, and lignin particles are separated from black liquor. EFFECT: method enables to obtain lignin with high output, having a suitable particle size with a short dwell time and at an industrial scale with low operating costs, which enables to quickly change process conditions. 15 cl, 5 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 564 674 C2 (51) МПК C07G 1/00 (2011.01) D21C 11/00 (2006.01) D21C 11/04 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2013117995/04, 14.10.2011 (24) Дата начала отсчета срока действия патента: 14.10.2011 (72) Автор(ы): МИЕТТИНЕН Мауно (FI) (73) Патентообладатель(и): ЮПМ-Кюммене Корпорейшн (FI) Приоритет(ы): (30) Конвенционный приоритет: R U 15.10.2010 FI 20106073; 11.05.2011 FI 20115452 (43) Дата публикации заявки: 20.11.2014 Бюл. № 32 (56) Список документов, цитированных в отчете о поиске: US 2997466 A1, 22.08.1961. WO 2008079072 A1, 03.07.2008. US 2828297 A, 25.03.1958. WO 1992013849 A1, 20.08.1992. US 3223697 A1, 14.12.1965. SU 81886 A1, 19.08.1949. (85) Дата начала рассмотрения заявки PCT на национальной фазе: 15.05.2013 2 5 6 4 6 7 4 (45) Опубликовано: 10.10.2015 Бюл. № 28 FI 2011/050896 (14.10.2011) C 2 C 2 ( ...

СПОСОБ ПЕРЕРАБОТКИ ЦЕЛЛЮЛОЗНОЙ МАССЫ ХОЛОДНОЩЕЛОЧНОЙ ЭКСТРАКЦИЕЙ С ПОВТОРНЫМ ИСПОЛЬЗОВАНИЕМ ЩЕЛОЧНОГО ФИЛЬТРАТА И СИСТЕМА ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

FIELD: chemistry. SUBSTANCE: method for pulp processing using cold caustic extraction includes: delignifying organic materials in a digester and treating the resulting brown pulp to obtain semi-purified pulp for use in producing soluble pulp; extracting the semi-purified pulp with a caustic solution during a cold caustic extraction process; washing the purified pulp and collecting the obtained spent wash liquid by separating the hemicellulose-containing solution from the purified pulp; combining the spent wash liquid and the hemicellulose-containing solution to obtain an alkaline filtrate; concentrating the alkaline filtrate and using at least a portion of the concentrated alkaline filtrate in said digester to obtain a soluble pulp. EFFECT: high content of alpha cellulose in soluble cellulose and high efficiency of using the filtrate. 50 cl, 5 dwg, 1 tbl, 4 ex РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 523 973 C1 (51) МПК D21C 1/06 (2006.01) D21C 3/02 (2006.01) D21C 11/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2012151858/12, 18.08.2010 (24) Дата начала отсчета срока действия патента: 18.08.2010 (72) Автор(ы): ЛЕЙТЕ Марселу Морейра (BR) (73) Патентообладатель(и): БАЙА СПЕШАЛТИ СЕЛЬЮЛОЗ СА (BR) Приоритет(ы): (30) Конвенционный приоритет: R U 04.05.2010 RU 2010118498; 06.05.2010 KR 10-2010-0042681; 27.05.2010 US 12/789,265 (45) Опубликовано: 27.07.2014 Бюл. № 21 2005203291 A1, 15.09.2005. US 2009312536 A1, 17.12.2009. US 2004020854 A1, 05.02.2004 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 04.12.2012 (86) Заявка PCT: 2 5 2 3 9 7 3 (56) Список документов, цитированных в отчете о поиске: US 2004020854 A1, 05.02.2004; . US 2 5 2 3 9 7 3 R U (87) Публикация заявки PCT: C 1 C 1 IB 2010/002244 (18.08.2010) WO 2011/138633 (10.11.2011) Адрес для переписки: 109012, Москва, ул. Ильинка, 5/2, ООО "Союзпатент" (54) СПОСОБ ПЕРЕРАБОТКИ ЦЕЛЛЮЛОЗНОЙ МАССЫ ХОЛОДНОЩЕЛОЧНОЙ ЭКСТРАКЦИЕЙ С ...

КОМПОЗИЦИЯ ДЛЯ ИНГИБИРОВАНИЯ ОБРАЗОВАНИЯ ОТЛОЖЕНИЙ КАЛЬЦИЕВЫХ СОЛЕЙ

... 1. Способ ингибирования образования отложений кальциевых солей в способе варки целлюлозы, включающий добавление эффективного количества ингибирующей отложения композиции к щелочной водной смеси в котле для указанного способа варки целлюлозы и/или к черному щелоку для способа варки целлюлозы, где композиция состоит из по меньшей мере одного фосфонатного компонента (I), выбранного из по меньшей мере одного из соединений (1), (2), (3) и (4), и по меньшей мере одного компонента (II), состоящего из по меньшей мере одного карбоксилированного фруктанового соединения,где соединение (1) представляет собой по меньшей мере одну аминоалкиленфосфоновую кислоту или ее соответствующую аминоалкиленфосфонатную соль, выбранную из соединений, имеющих общую формулу:,где Х выбран из C-Cлинейных, разветвленных, циклических или ароматических углеводородных радикалов, которые могут быть замещены одной или более C-Cлинейными, разветвленными, циклическими или ароматическими группами, которые (радикалы и/или группы ...

FLÜSSIGKEITSVERTEILER FÜR VERDAMPFER

Continuous method for the precipitation of lignin from black liquor

Continuous method for the precipitation of lignin from black liquor

Continuous method for the precipitation of lignin from black liquor

Continuous method for the precipitation of lignin from black liquor

PROCEDURE FOR THE PRODUCTION OF SULFUR EN CONNECTIONS

VERFAHREN ZUR EINDICKUNG VON ABLAUGEN UND RÜCKGEWINNUNG VON KOCHCHEMIKALIEN BEI DER ZELLSTOFFHERSTELLUNG

AS WELL AS PROCEDURE FOR THE PROCESSING OF USED AUFSCHLUSSFLUESSIKGEIT PLANTS FOR THE EXECUTION OF THIS PROCEDURE

COOKING OF CELLULOSE IN VORVERDAMPFTE SCHWARZLAUGE A CONTAINING KOCHLAUGE

Process for the separation of hemicelluloses from biomass digestion process water or spent liquor

Die Erfindung betrifft ein Verfahren zur Abtrennung von Hemizellulosen aus Biomasse-Aufschlussprozesswasser oder verbrauchten Laugen, mit Abscheidung der gelösten Feststoffe, Aufkonzentration des Produkts und Reinigung des Produkts durch Abscheidung der anorganischen Salze und Substanzen mit geringem Molekulargewicht. Sie ist dadurch gekennzeichnet, dass die Bedingungen des Hemizellulose-Abscheidungsprozesses bei einzelnen Trenn- /Reinigungsstufen getrennt eingestellt werden, beispielsweise durch Einstellung des pH-Werts. Weiters betrifft die Erfindung eine Anlage für die Durchführung des Prozesses. Mit einem derartigen Verfahren und einer derartigen Anlage ist es möglich, einen Großteil der gelösten Feststoffe - insbesondere Xylan und andere Hemizellulosen - zurückzugewinnen.

Process for the separation of hemicelluloses from biomass digestion process water or spent liquor

Die Erfindung betrifft ein Verfahren zur Abtrennung von Hemizellulosen aus Biomasse-Aufschlussprozesswasser oder verbrauchten Laugen, mit Abscheidung der gelösten Feststoffe, Aufkonzentration des Produkts und Reinigung des Produkts durch Abscheidung der anorganischen Salze und Substanzen mit geringem Molekulargewicht. Sie ist dadurch gekennzeichnet, dass die Bedingungen des Hemizellulose-Abscheidungsprozesses bei einzelnen Trenn- /Reinigungsstufen durch Einstellung des pH-Werts getrennt eingestellt werden. Weiters betrifft die Erfindung eine Anlage für die Durchführung des Prozesses. Mit einem derartigen Verfahren und einer derartigen Anlage ist es möglich, einen Großteil der gelösten Feststoffe - insbesondere Xylan und andere Hemizellulosen - zurückzugewinnen.

PROCEDURE FOR THE INCREASE OF THE TROCKENGEHALTES OF SCHWARZLAUGE.

IMPROVED CHEMICAL RECUPERATION FROM SCHWARZLAUGE

PROCEDURE FOR THE CONCLUDING EVAPORATION OF SCHWARZLAUGE

METHOD FOR TREATMENT AND RECYCLING OF PULP MILL BLEACH PLANT EFFLUENTS

COMPOSITION FOR INHIBITING CALCIUM SALT SCALE FORMATION

A method for inhibiting the formation, deposition and adherence of calcium salt scale to metallic and other sur-faces in the equipment, vessels and/or piping of a chemical pulp process facility comprising adding an effective scale inhibiting amount of a composition to the alkaline aqueous mixture in the digester of said chemical pulping process. Said composition con-sists of at least one phosphonate component (I) and at least one component (II) consisting of at least one carboxylated fructan compound.

COMPOSITION FOR INHIBITING CALCIUM SALT SCALE FORMATION

A method for inhibiting the formation, deposition and adherence of calcium salt scale to metallic and other surfaces in the equipment, vessels and/or piping of a chemical pulp process facility comprising adding an effective scale inhibiting amount of a composition to the alkaline aqueous mixture in the digester of said chemical pulping process. Said composition consists of at least one phosphonate component (I) and at least one component (II) consisting of at least one carboxylated fructan compound.

METHOD AND APPARATUS FOR CONCENTRATING BLACK LIQUOR

A METHOD AND APPARATUS FOR CONCENTRATING BLACK LIQUOR A method and apparatus are disclosed for concentrating an alkaline waste liquor containing sulfur compounds, the so-called black liquor, which is discharged from a step of Kraft-cooking wood fibers, in order to recover the cooking chemicals from said waste liquor, characterized in that CO2 gas and/or a gas containing CO2 gas is added to said waste liquor as a boiling-point-lowering agent, viscositylowering agent and solidification promoter, after a step of oxidizing said waste liquor and in or prior to one or more stages during the step of concentrating said waste liquor.

METHOD FOR THE RECOVERY OF SULPHUR COMPOUNDS, VOLATILE ALCOHOLS, TURPENTINE AND THE LIKE PRODUCED IN CONNECTION WITH PULPING

A method for the recovery of sulphur compounds, volatile alcohols such as methanol, as well as by-products such as turpentine and the like, which are formed in connection with pulping, from the blow-expansion condensates from the evaporating series of a digestery, from turpentine mother liquors, or from other liquids in a separate treatment unit. The liquids are treated in a vacuum stripping unit by means of a proportion of secondary steam which is obtained from the last step of a multi-stage evaporating plant. The excess of secondary steam is condensed by means of indirect condensation in a first surface condenser, whose exhaust vapours, together with the vapours leaving the stripping unit and with gases that are to be removed from the evaporating steps,are condansed by means of indirect condensation in a second surface condenser. The condensate from the second surface condenser is used as return flow into the stripping unit, and the gases leaving the condenser are, by means of a vacuum ...

PROCESS FOR ISOLATING LIGNIN FROM AN ALKALINE PROCESS STREAM

In a process for isolating lignin from an alkaline process stream, especially thickened black liquor, the alkaline process stream is introduced continuously into a lower region of at least one circulation reactor (1) having two reactor zones in a concentric arrangement, wherein a liquid level (10) of the alkaline process stream in the interior of the at least one circulation reactor (1) is chosen essentially at a level with an upper end (7) of an inner tubular reactor zone (6), wherein a CO2-containing gas is blown continuously from the bottom into the inner tubular reactor zone (6) of the at least one circulation reactor (1), wherein the CO2-containing gas is absorbed by the alkaline process stream in the inner circular reactor zone (6) and offgas is drawn off together with residual amounts of the CO2 at the top of the at least one circulation reactor (1), wherein the process is run at ambient pressure, especially 1 atm, and thickened black liquor with a reduced lignin content together ...

FLASH TANK WITH FLARED INLET INSERT AND METHOD FOR INTRODUCING FLOW INTO A FLASH TANK

A flash tank including: an interior chamber having a interior surface formed by a sidewall of the flash tank; a vapor exhaust port coupled to an upper portion of the chamber; a liquid discharge port coupled to a lower portion of the chamber; an insert inlet tube having an insert outlet and inserted into an inlet port of the chamber, wherein the insert inlet tube extends inward of the sidewall and the insert outlet has an elongated cross-sectional shape oriented substantially parallel to a center vertical axis of the flash tank and substantially perpendicular to a radial line of the flash tank, such that the insert outlet is substantially tangential to the sidewall.

SYSTEM AND APPARATUS FOR RECOVERY OF TURPENTINE FROM THERMOMECHANICAL PULPING PROCESS

There has been provided a system and apparatus for recovering turpentine from a thermomechanical pulping process for making paper, which thermomechanical pulping process utilizes a plug screw conveyor for squeezing and feeding pulp chips. The thermomechanical pulping process is conventional. The liquid effluent from said plug screw conveyor contains an appreciable amount of turpentine. The liquid effluent is collected under superatmospheric pressure and flashed into vapor/liquid separator by releasing the pressure on the liquid. This vapor is condensed in a suitable condenser and the condensate collected in a decanter where the turpentine collects as a separate phase and the water also as a separate phase. Condensate from various vents in the conventional thermomechanical pulping process may be collected for more nearly complete removal of turpentine and other oleoresinone components.

PROCESS AND PLANT FOR IMPROVED HEAT EFFICIENCY BY CONDENSATION OF VAPOUR IN CONCENTRATED SOLUTIONS

A process of improving the heat efficiency by condensation of vapour in concentrated chemical solutions, according to which vapour and a concentrated chemical solution are introduced into an absorber comprising a cooler/condenser. In accordance with the invention, the condensate formed in the condensation process is utilised to dilute the concentrated chemical solution in the absorber, and the heat of condensation and the heat of solution generated from the dilution step are recovered by heat exchange thereof with a heat-absorbing medium. A plant for performing the process is described, comprising an absorber (1) and a cooler (condenser) associated therewith, and at least one heat exchanger (3) having an inlet and an outlet for supply and withdrawal of a heat-absorbing medium. The plant has at least one inlet to the absorber (1) for supply of concentrated chemical solution, at least one inlet to the absorber (1) for the supply of vapour, and at least one outlet from the absorber for withdrawal ...

Verfahren zur Überführung von Sulfitablauge in ein festes Produkt unter Vermeidung der Verunreinigung von Abwässern.

Eindampfverfahren

Apparat zum Eindampfen von Flüssigkeiten.

Verfahren zur Behandlung von Sulfitablauge

Verfahren zur Überführung von Sulfitablauge in ein festes, die Abwässer nicht verunreinigendes Produkt

Verfahren zur Erzeugung von Trockengut aus Ablauge der Zellstofferzeugung

Installation for the evaporation and the combustion of liquids containing of the combustible materials

Procede et dispositif pour l'evaporation de lessive residuaire produite lors de la cuisson de materiaux fibreux contenant de la cellulose

Procede d'evaporation de lessive residuaire produite lors de la cuisson de materiaux fibreux contenant de la cellulose dans un lessiveur continu de pate brute selon lequel le materiau fibreux est chauffe jusqu'a la temperature de traitement a l'aide de vapeur et la lessive residuaire est evacuee du lessiveur, caracterise en ce qu'une partie au moins de la vapeur par laquelle le materiau fibreux est chauffe dans le lessiveur, comprend de la vapeur engendree par evaporation de la lessive residuaire evacuee du lessiveur.

PROCEEDED OF CONCENTRATION Of a HOT LIQUID PRODUCT WITH SIMULTANEOUS HEATING Of a FLUID OTHER THAN the LIQUID PRODUCT TO CONCENTRATE

Process and equipment for the treatment of black liquors of paper mill

Method economically to use residual sulphited cellulose liquor

PROCEEDED OF RECOVERY OF COMPOSE SULPHURS, Of VOLATILE ALCOHOLS, TERPENTINE AND SIMILAR PRODUCTS, OBTAINED WITHIN FRAMEWORK OF the MANUFACTURE OF the PASTE HAS PAPER

Process for concentrating a hot liquid product with simultaneous heating of a fluid other than the liquid product to be concentrated

PROCESS AND DEVICE FOR the WASTE EVAPORATION OF DETERGENT PRODUCED DURING the FIBROUS MATERIAL COOKING CONTAINING OF CELLULOSE

Procédé d'évaporation de lessive résiduaire produite lors de la cuisson de matériaux fibreux contenant de la cellulose dans un lessiveur continu de pâte brute selon lequel le matériau fibreux est chauffé jusqu'à la température de traitement à l'aide de vapeur et la lessive résiduaire est évacuée du lessiveur, caractérisé en ce qu'une partie au moins de la vapeur par laquelle le matériau fibreux est chauffé dans le lessiveur, comprend de la vapeur engendrée par évaporation de la lessive résiduaire évacuée du lessiveur. Process for the evaporation of waste liquor produced during the firing of fibrous materials containing cellulose in a continuous raw pulp digester whereby the fibrous material is heated to the treatment temperature using steam and the waste liquor is discharged from the digester, characterized in that at least part of the steam by which the fibrous material is heated in the digester comprises steam generated by evaporation of the waste liquor discharged from the digester.

Improvements brought to the heat treatment of finely divided substances

tubo de transferência de calor, e, método para fabricar um tubo de transferência de calor.

CONTINUOUS METHOD FOR THE PRECIPITATION OF LIGNIN FROM BLACK LIQUOR

CONTINUOUS METHOD FOR THE PRECIPITATION OF LIGNIN FROM BLACK LIQUOR

Sistema y metodo de deteccion de emision acustica para predecir explosiones en un tanque de disolucion

UN SISTEMA PARA PREDECIR UNA AFLUENCIA DE FUNDICIÓN EN UN TANQUE DE DISOLUCIÓN QUE COMPRENDE UN TANQUE DE DISOLUCIÓN ADYACENTE A UNA CALDERA DE RECUPERACIÓN, UN SURTIDOR DE FUNDICIÓN QUE TIENE UN PRIMER EXTREMO CERCA DE UNA CALDERA DE RECUPERACIÓN Y UN SEGUNDO EXTREMO OPUESTO AL PRIMER EXTREMO, EL CUAL SEGUNDO EXTREMO ESTÁ CERCA DE UN TANQUE DE DISOLUCIÓN, EN DONDE EL SURTIDOR DE FUNDICIÓN ESTÁ CONFIGURADO PARA RECIBIR UNA FUNDICIÓN DESDE LA CALDERA DE RECUPERACIÓN Y TRANSPORTAR LA FUNDICIÓN HACIA EL TANQUE DE DISOLUCIÓN; UN SENSOR DE EMISIÓN ACÚSTICA QUE TIENE UN EXTREMO DE LECTURA CONFIGURADO PARA DETECTAR EMISIONES ACÚSTICAS QUE EMANAN DE LA FUNDICIÓN QUE ENTRA EN CONTACTO CON UN LÍQUIDO EN EL TANQUE DE DISOLUCIÓN, Y EN DONDE EL SENSOR DE EMISIÓN ACÚSTICA TIENE UN TRANSDUCTOR EN COMUNICACIÓN DE SEÑAL CON EL EXTREMO DE LECTURA, Y EN DONDE EL TRANSDUCTOR ESTÁ CONFIGURADO PARA TRANSDUCIR LAS EMISIONES ACÚSTICAS A UNA SEÑAL ELÉCTRICA INICIAL; UN PREPROCESADOR CONFIGURADO PARA AMPLIFICAR, ...

Evaporator

Reclamation of low-melting-point salts from black liquor

FLASH TANK WITH FLARED INLET INSERT AND METHOD FOR INTRODUCING FLOW INTO A FLASH TANK

A flash tank including: an interior chamber having a interior surface formed by a sidewall of the flash tank; a vapor exhaust port coupled to an upper portion of the chamber; a liquid discharge port coupled to a lower portion of the chamber; an insert inlet tube having an insert outlet and inserted into an inlet port of the chamber, wherein the insert inlet tube extends inward of the sidewall and the insert outlet has an elongated cross-sectional shape oriented substantially parallel to a center vertical axis of the flash tank and substantially perpendicular to a radial line of the flash tank, such that the insert outlet is substantially tangential to the sidewall.

A recovery boiler plant and a method in a recovery boiler

A recovery boiler plant, which comprises a recovery boiler, wherein in the first part (1 a) flue gases travel in a first direction (F1). The furnace also comprises a second part (1 b), where the flue gases proceed in a second direction (F2), which second direction differs from the first direction (F1). In addition, the invention relates to a method in a recovery boiler.

BLACK LIQUOR VISCOSITY CONTROL

АКУСТИКО-ЭМИССИОННАЯ СИСТЕМА И СПОСОБ ПРОГНОЗИРОВАНИЯ ВЗРЫВОВ В РЕЗЕРВУАРЕ ДЛЯ РАСТВОРЕНИЯ

Изобретение описывает систему для прогнозирования взрывов в резервуаре для растворения. Данная система включает в себя акустико-эмиссионные датчики, помещенные внутри или вокруг резервуара для растворения. Посредством фильтрования зарегистрированных частот до диапазона, который является наиболее чувствительным в отношении характерных признаков желаемых взрывов, становится возможным прогнозирование входящего потока расплава, прежде чем возникает входящий поток, а также программирование ответных действий в целях предотвращения угрожающих взрывов. 2 н. и 30 з.п. ф-лы, 6 ил.

СПОСОБ ИЗВЛЕЧЕНИЯ ХИМИЧЕСКИХ ВЕЩЕСТВ ИЗ КРАФТ-ЦЕЛЛЮЛОЗНОГО ЧЕРНОГО ЩЕЛОКА И СПОСОБ УПРАВЛЕНИЯ ВЯЗКОСТЬЮ КРАФТ-ЦЕЛЛЮЛОЗНОГО ЧЕРНОГО ЩЕЛОКА

Предложен улучшенный способ извлечения химических веществ из крафт-целлюлозного черного щелока, в случае которого тепло, образующееся при контролируемом окислении щелока, используют для понижения вязкости и низшей теплотворной способности щелока, чем обеспечивается возможность сжигания более концентрированного щелока в котле-утилизаторе. При данном расходе черного щелока оказывается повышенной результирующая производительность по пару. Или же оказывается возможным сжигание щелока с повышенной концентрацией твердых веществ, в результате чего повышается пропускная способность котла-утилизатора. 3 с. и 18 з.п. ф-лы, 6 табл., 4 ил.

АКУСТИКО-ЭМИССИОННАЯ СИСТЕМА И СПОСОБ ПРОГНОЗИРОВАНИЯ ВЗРЫВОВ В РЕЗЕРВУАРЕ ДЛЯ РАСТВОРЕНИЯ

СПОСОБ И ОБОРУДОВАНИЕ ДЛЯ ВЫПАРИВАНИЯ ЧЕРНОГО ЩЕЛОКА, КОТОРЫЙ ПОЛУЧАЮТ ОТ ПРОЦЕССА ВАРКИ ВО ВРЕМЯ ПРОИЗВОДСТВА ЦЕЛЛЮЛОЗНОЙ МАССЫ

... 1. Способ выпаривания горячего черного щелока, получаемого от процесса варки во время производства целлюлозной массы, в котором черный щелок вводят в многоступенчатую линию выпаривания по меньшей мере с пятью стадиями выпаривания, отличающийся тем, что горячий черный щелок, который должен подвергнуться выпариванию в линии выпаривания, охлаждают посредством теплообмена с частично выпаренным черным щелоком, который по меньшей мере частично был выпарен на стадии выпаривания в линии выпаривания. ! 2. Способ по п.1, отличающийся тем, что горячий черный щелок охлаждают по меньшей мере два раза в теплообмене с частично выпаренным черным щелоком, который подвергся по меньшей мере частичному выпариванию на первой и на второй стадиях выпаривания в линии выпаривания. ! 3. Способ по п.2, отличающийся тем, что горячий черный щелок охлаждают по меньшей мере три раза в теплообмене с частично выпаренным черным щелоком, который подвергся по меньшей мере частичному выпариванию на первой, на второй и на третьей ...

LIQUID DISTRIBUTOR FOR EVAPORATORS

PROCEDURE FOR THE PRODUCTION OF STEAM FROM SCHWARZLAUGE

PROCEDURE AND PLANT FOR THE CLEANING OF CONTAMINATED CONDENSATE USING A COMBINED GAS SCRUBBER/CCONDENSER

PROCEDURE FOR THE PRODUCTION OF SULFUR EN CONNECTIONS

PROCEDURE FOR THICKENING OF ABLAUGEN AND RECUPERATION OF COOK CHEMICALS DURING THE CELLULOSE PRODUCTION

Method an arrangement for cleaning contaminated condensate including a combined stripper/condenser

METHOD AND ARRANGEMENT FOR CLEANING CONTAMINATED CONDENSATE INCLUDING A COMBINED STRIPPER/CONDENSER

This invention relates to a method for cleaning unclean condensate, emanated when producing cellulose pulp including evaporation of spent liquor under utilization of a cleaning plant having several condensers, coupled in series, characterized in that process steam from the last evaporation stage and unclean condensate are introduced into a combined stripper/condenser, the process steam and the condensate being brought to flow in opposite directions so that direct heat exchange occurs, resulting in that volatile compounds of the condensate are separated and are taken up by the steam under simultaneous indirect cooling, resulting in condensation of the main part of the process steam, that the remaining process steam is gradually flowing furtheron, the process steam being successively cooled indirectly, resulting in that water and turpentine are first condensed and collected and that methanol is condensed, collected condensate being separated from turpentine, which is removed from the plant ...

PROCESS FOR PRODUCING FURFURAL, FORMIC ACID AND ACETIC ACID FROM SPENT PULP-COOKING LIQUOR

The invention relates to a process for producing furfural, for forming formic and acetic acids and for recovering formic and acetic acids in a pulp making process, in which an acid mixture containing mainly formic and acetic acids is used as a cooking chemical. The process of the invention is characterized by utilizing reactive evaporation and recycling of spent cooking liquors in evaporators in the recovering stage of the cooking chemicals. Thus it is possible to form effectively more furfural, formic acid and acetic acid from the dissolved organic matter contained in the cooking liquor and/or chemically bound acids contained therein.

ACOUSTIC EMISSION SYSTEM AND METHOD FOR PREDICTING EXPLOSIONS IN DISSOLVING TANK

The present disclosure describes a system for predicting explosions in a dissolving tank. The system includes acoustic emission sensors placed in or around the dissolving tank. By filtering the recorded frequencies to the range which is most sensitive for desired explosions "fingerprints," it is possible to predict a smelt influx before the smelt influx occurs as well as program response actions to prevent compromising explosions.

MINIMUM ADVERSE ENVIRONMENTAL IMPACT PULP MILL

Effluents are minimized from a cellulose pulp mill having a recovery boiler by concentrating liquid effluents from the bleach plant and/or liquid spills from process streams, incinerating the concentrated effluents in the recovery boiler, removing particles present in the flue gases from the recovery boiler to produce an ash including salts containing potassium and chloride, and sulfur compounds, and removing the potassium and chloride from the ash while returning the sulfur containing compounds to the recovery loop, so as to balance the sulfur, chloride and potassium levels in the mill. The sulfur is typically returned directly to a stream of black liquor just before entry into the recovery boiler. Green liquor is produced from the melt, which preferably is treated to remove metals from it prior to caustization (e.g. by sedimentation and/or filtration), and prior to green liquor crystallization to produce sodium hydroxide.

METHOD FOR TREATMENT AND RECYCLING OF PULP MILL BLEACH PLANT EFFLUENTS

The invention relates to a method for treatment and recycling of pulp mill bleach plant effluents. Chlorinecontaining chemicals are separated from the fluid obtained from the first bleach stage (DC) implemented with these chlorine-containing bleach chemicals on pulp (2) that has been washed (W) and partially dewatered (P1) whereby the pulp (3) from the mentioned bleach stage (DC), with chlorine-containing bleach chemicals, is dewatered (P2) up to about the same dryness of at least 25 % and at most 35 % as for the mentioned thereto incoming pulp (2) and whereby the fluid from the second dewatering (P2) is recycled to the bleach stage (DC) and the outcoming fluid (9) from the bleach stage (DC) is evaporated (EV) through indirect heating with condensing vapour obtained through recompression of vapour stripped in the evaporation. The dewatering (P1, P2) is preferably performed by pressing out the liquid from the pulp (2, 3) and the evaporation (EV) in several stages connected in parallel or ...

PROCESS FOR PURIFYING CONDENSATE WHILE EVAPORATING WASTE LIQUORS

The invention relates to a process for evaporating spent liquor or other waste liquids from cellulose cooking. The evaporation is performed in a multiplicity of evaporators which are coupled in series and in which the evaporation is driven using liquor steam. The condensates from the steam are divided, in one or more effects, into at least two fractions with respect to purity. The invention is characterized in that the purer fraction from one effect is conveyed, at a high level, into a subsequent effect in the direction of movement of the liquor, while the dirtier fraction is conveyed, at a high level or at the very top, into a preceding effect in the direction of movement of the liquor.

HEAT RECOVERY FROM SPENT DIGESTER COOKING LIQUOR

Steam (preferably clean steam) having less noncondensible gases than steam produced by conventional black liquor flashing is produced from hot black liquor from a digester of a pulp mill. A heat exchanger (19) is utilized and the hot black liquor is passed through the heat exchanger in heat exchange contact with an evaporable liquid (18), preferably clean water. After the water is heated in the heat exchanger it is flashed in at least one flash tank (21, 22) where the heat exchanger is a liquid-to-liquid heat exchanger. The heat exchanger may alternatively include an evaporator (27) (such as a falling film evaporator) in which case the black liquor is passed through an inductor (26) before it enters the evaporator. Alternatively, the heat exchanger may be one or more boilers (42, 43), such as kettle boilers, in which case the black liquor preferably passes through a cooler (44) after the boilers. Heat energy and turpentine recovery are also maximized.

BLACK LIQUOR VISCOSITY CONTROL

Black liquor is subjected to high shear to cause a breakdown of macromolecules contained therein and provide a reduction in viscosity, thereby improving the processability of the black liquor and enabling the solids content to be increased.

Method for recovering pulping chemicals and reducing the concentration of potassium and chloride therein

Acoustic emission system and method for predicting explosions in dissolving tank

METHOD AND DEVICE FOR CONCENTRATING SPENT LIQUORS AND RECOVERING CHEMICAL AGENTS IN METHODS FOR THE TREATMENT OF PULP.

Process for the recovery of aliphatic acids and sugars starting from an exhausted solution paper pulp depreparation

The invention relates to a process to a process for the recovery of lower aliphatic acids, such as formic acid, and sugars from the spent cooking liquor from a pulping process carried out with these same acids, lignin having been removed from the spent liquor. According to the invention, spent liquor is evaporated indirectly in a plurality of steps (1, 2, 3) by heating a preceding step (1, 2) with an acid-containing vapor (9, 13) obtained from the subsequent step (2, 3) and by diluting (4, 5) with the obtained condensate (11) the concentrated spent liquor (12) from the preceding step (2), water or a very dilute aqueous solution (14) being used in the last dilution step (3).

PROCESS AND PLANT FOR CONDENSED PURIFICAÇÃO OF IMPURE

PROCESSO PARA A SEPARACAO DE PRODUTOS QUIMICOS QUE CONTER CLORO DO LIQUIDO OBTIDO NA PRIMEIRA ETAPA DE BRANQUEAMENTO

PROCESS FOR PURIFYING CONDENSATE WHILE EVAPORATING WASTE LIQUORS

The invention relates to a process for evaporating spent liquor or other waste liquids from cellulose cooking. The evaporation is performed in a multiplicity of evaporators which are coupled in series and in which the evaporation is driven using liquor steam. The condensates from the steam are divided, in one or more effects, into at least two fractions with respect to purity. The invention is characterized in that the purer fraction from one effect is conveyed, at a high level, into a subsequent effect in the direction of movement of the liquor, while the dirtier fraction is conveyed, at a high level or at the very top, into a preceding effect in the direction of movement of the liquor.

PROCESS FOR RECOVERING TURPENTINE AND HEAT IN CONNECTION WITH THE EVAPORATION OF BLACK LYE

Cooking of cellulose pulp in a cooking liquor containing preevaporated black liquor

The method is for cooking of cellulose pulp in which the raw material, preferably in the form of chips, undergoes a successive elevation of temperature towards the cooking temperature while the chips are first impregnated with an impregnation liquor followed by cooking in a cooking liquor that is preferably alkali. Through the addition of pre-evaporated black liquor, either as early as the impregnation stage or during the subsequent cooking stage, an improved delignification process is achieved in which the pulp obtains improved properties, primarily with respect to strength/viscosity for a given degree of delignification, and also with respect to yield. The method can be used both for continuous cooking and for batch cooking of cellulose pulp.

Method of controlling sulfidity of a sulfate cellulose mill

To decrease the sulfur emissions of a sulfate cellulose mill, black liquor is heated before the last effect of the evaporation at a temperature higher than the cooking temperature of the sulfate cook and the sulfidity of white liquor is adjusted by adjusting the temperature and/or retention time of the heat treatment so that a predetermined amount of sulfur compounds are separated from the gaseous black liquor. Preferably, the sulfur containing gas is thereafter divided into different fractions and separately combusted.

HEAT TRANSFER TUBE AND METHOD FOR MANUFACTURING A HEAT TRANSFER TUBE

The invention relates to a heat transfer tube () for falling film evaporation having a heating medium surface () to be heated by a heating medium, a falling film surface () to have spent liquor passing over it, and being made from an sheet metal material. The falling film surface of the heat transfer tube is equipped with a multitude of wire bumps (WB), each wire bump being spaced apart along the longitudinal axis (CC) of the heat transfer tube from a neighbouring wire bump by 3-300 mm, said wire bumps (WB) having a height (h) in the range 0.3 to 5.0 mm, a width (w) in the range 0.3-5.0 mm, and an inclination angle (a) versus a plane orthogonal to a longitudinal axis (CC) of the heat transfer tube in a range of 0-70 degrees. The invention also relates to a method for manufacturing said heat transfer tube. 199. A heat transfer tube () for falling film evaporation of spent liquor , the heat transfer tube () having:{'b': '21', 'a heating medium surface () arranged to be heated by a heating medium; and'}{'b': 20', '21', '20, 'a falling film surface () opposite and facing away from said heating medium surface (), which falling film surface () is arranged to have spent liquor containing lignin and other dissolved components from cellulosic material and/or inorganics from the cellulosic material and chemicals used passing over it as a falling film while evaporating solvent from the falling film and thus increasing the dry matter content; said heat transfer tube being made from a sheet metal material, e.g. an iron based high alloy stainless steel material with an alloy content above 16.00% for Chromium and above 1% for Nickel, preferably corresponding to corrosion resistant steel qualities at least like AISI 316 or AISI 304 characterized in that'}{'b': 20', '9', '9, 'the falling film surface () of the heat transfer tube () is equipped with a multitude of wire bumps (WB), each wire bump being spaced apart along the longitudinal axis (CC) of the heat transfer tube from a ...

Combustion of streams derived from hot water extraction of wood material

Various techniques are described for enhanced combustion of hot water extraction (HWE) derived liquor. For example, the HWE derived liquor can be pre-treated prior to introduction into a combustion chamber. The pre-treatment can include subjecting HWE derived liquor to filtration to remove suspended solids, evaporation to produce a first stage concentrated HWE liquor; additional concentration to produce a second stage concentrated HWE liquor; additional filtration to remove additional suspended solids; and pre-heating to produce a preheated HWE liquor. The preheated HWE liquor can be atomized and combined with pre-heated combustion air supplied into a combustion chamber to effect combustion of the HWE derived liquor.

METHOD FOR SEPARATING BIOMASS COMPONENTS BY TERNARY SYSTEM

A method for separating biomass components by a ternary system, which relates to a technical field of biomass separation, and includes the following steps of: cooking and separating a biomass raw material by using a cooking liquor consisting of organic acid, small aromatic nucleophilic organic molecule and hydrogen peroxide to obtain solid residue and extracting solution, washing and screening the solid residue to obtain paper pulp, and separating and extracting lignin and/or hemicellulose from the extracting solution. This cooking system could effectively minimize the content of residual lignin and other compounds with chromophore groups in the obtained pulp, directly producing the high-whiteness pulp with excellent performance without additional bleaching process. In addition, the hemicellulose saccharides and high-activity lignin can be also obtained, so that the method has an important significance for realizing high value and industrialization of biomass resource utilization.

PROCESS FOR PRODUCING FURFURAL, FORMIC ACID AND ACETIC ACID FROM SPENT PULP-COOKING LIQUOR

The invention relates to a process for producing furfural, for forming formic and acetic acids and for recovering formic and acetic acids in a pulp making process, in which an acid mixture containing mainly formic and acetic acids is used as a cooking chemical. The process of the invention is characterized by utilizing reactive evaporation and recycling of spent cooking liquors in evaporators in the recovering stage of the cooking chemicals. Thus it is possible to form effectively more furfural, formic acid and acetic acid from the dissolved organic matter contained in the cooking liquor and/or chemically bound acids contained therein.

Method and arrangement for increasing evaporation capacity of a multi-stage evaporator of spent liquor in a pulp mill

A method and arrangement for increasing evaporation capacity in a multistage evaporation plant of spent liquor of a pulp mill. The method comprises increasing the pressure of vapour discharged from an evaporation stage by a separate booster means, and supplying the vapour having increased pressure to the following evaporation stage. In the arrangement the booster means (A-E) is provided in a conduit through which vapour is supplied from one evaporation stage onwards for increasing the pressure of the vapour conducted in the conduit. ...

METHOD AN ARRANGEMENT FOR CLEANING CONTAMINATED CONDENSATE INCLUDING A COMBINED STRIPPER/CONDENSER

This invention relates to a method for cleaning unclean condensate, emanated when producing cellulose pulp including evaporation of spent liquor under utilization of a cleaning plant having several condensers, coupled in series, characterized in that process steam from the last evaporation stage and unclean condensate are introduced into a combined stripper/condenser, the process steam and the condensate being brought to flow in opposite directions so that direct heat exchange occurs, resulting in that volatile compounds of the condensate are separated and are taken up by the steam under simultaneous indirect cooling, resulting in condensation of the main part of the process steam, that the remaining process steam is gradually flowing furtheron, the process steam being successively cooled indirectly, resulting in that water and turpentine are first condensed and collected and that methanol is condensed, collected condensate being separated from turpentine, which is removed from the plant ...

POST-TREATMENT METHOD AND APPARATUS OF USED DECOMPOSING LIQUID

СПОСОБ ПОЛУЧЕНИЯ ОСАЖДЕННОГО ЛИНГИНА ИЗ ЧЕРНОГО ЩЕЛОКА И ОСАЖДЕННЫЙ ЛИНГИН, ПОЛУЧЕННЫЙ УКАЗАННЫМ СПОСОБОМ

FIELD: chemistry. SUBSTANCE: claimed invention relates to method for obtaining precipitated lignin from black liquor, in which method contains the following stages: supply of black liquor flow, processing black liquor at higher temperature and precipitation of lignin from thermally processed black liquor. In addition, claimed invention relates to precipitated lignin, obtained by said method, and to application of obtained precipitated lignin. EFFECT: increase of method efficiency. 6 cl, 1 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК D21C 11/00 (13) 2 567 352 C2 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2013104979/12, 07.07.2011 (24) Дата начала отсчета срока действия патента: 07.07.2011 Приоритет(ы): (30) Конвенционный приоритет: (72) Автор(ы): ХАННУС Микаэл (SE), БЬЕРК Мария (SE), ГАРОФФ Никлас (SE), ЭНГЛУНД Ингрид (SE) (43) Дата публикации заявки: 20.08.2014 Бюл. № 23 R U (73) Патентообладатель(и): СТОРА ЭНСО ОЙЙ (FI) 07.07.2010 US 61/362,011 (45) Опубликовано: 10.11.2015 Бюл. № 31 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 07.02.2013 (86) Заявка PCT: 2 5 6 7 3 5 2 (56) Список документов, цитированных в отчете о поиске: US 2828297 A1, 25.03.1958US 6239198 A1, 29.05.2001UA 5811527 A1, 22.09.1998CA 1172808 A1, 21.08.1984SU 821621 A1, 15.04.1981 2 5 6 7 3 5 2 R U (87) Публикация заявки PCT: WO 2012/005677 (12.01.2012) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) СПОСОБ ПОЛУЧЕНИЯ ОСАЖДЕННОГО ЛИНГИНА ИЗ ЧЕРНОГО ЩЕЛОКА И ОСАЖДЕННЫЙ ЛИНГИН, ПОЛУЧЕННЫЙ УКАЗАННЫМ СПОСОБОМ (57) Реферат: Настоящее изобретение относится к способу термообработанного черного щелока. Настоящее получения осажденного лигнина из черного изобретение, кроме того, относится к щелока, в котором способ содержит следующие осажденному лигнину, полученному указанным стадии: обеспечение потока черного щелока, способом, и к ...

СПОСОБ ПОЛУЧЕНИЯ ОСАЖДЕННОГО ЛИНГИНА ИЗ ЧЕРНОГО ЩЕЛОКА И ОСАЖДЕННЫЙ ЛИНГИН, ПОЛУЧЕННЫЙ УКАЗАННЫМ СПОСОБОМ

... 1. Способ получения осажденного лигнина из черного щелока, в котором способ содержит следующие стадии:- обеспечение потока черного щелока,- обработка потока черного щелока при повышенной температуре и- осаждение лигнина из термообработанного черного щелока.2. Способ по п.1, в котором лигнин осаждается при снижении рН черного щелока.3. Способ по любому из предшествующих пунктов, в котором температура черного щелока повышается до 150-200°C, предпочтительно 170-190°C.4. Способ по п.1, в котором черный щелок обрабатывается при повышенной температуре в течение 1-60 мин, предпочтительно 1-5 мин.5. Способ по п.1, в котором рН черного щелока, по меньшей мере, частично снижается перед термообработкой.6. Способ по п.1, в котором черный щелок перед термообработкой имеет содержание сухого вещества в интервале 30-50% общей концентрации сухого вещества.7. Осажденный лигнин, полученный способом по любому из пп.1-6.8. Осажденный лигнин по п.7, в котором средняя молекулярная масса лигнина является сниженной ...

СПОСОБ НЕПРЕРЫВНОГО ОСАЖДЕНИЯ ЛИГНИНА ИЗ ЧЕРНОГО ЩЕЛОКА

1. Способ непрерывного осаждения лигнина из черного щелока, в котором pH черного щелока понижают до точки осаждения лигнина, и осажденный лигнин отделяют от черного щелока, отличающийся тем, что- черный щелок подают так, что он протекает в виде находящегося под давлением потока в реакторе (2), при времени пребывания менее 300 с,- подкисляющий агент, выбранный из группы, состоящей из диоксида углерода, кислоты и их комбинаций, вводят в поток, в одной или большем количестве точек 2a подачи, чтобы снизить pH черного щелока,- под действием подкисляющего агента в находящемся под давлением потоке pH дают возможность понизиться до точки осаждения лигнина,- давление в находящемся под давлением потоке резко сбрасывают, и- частицы лигнина отделяют от черного щелока.2. Способ по п.1, отличающийся тем, что находящийся под давлением поток черного щелока, после добавления подкисляющего агента, перемешивают в турбулентном режиме, чтобы смешать подкисляющий агент с потоком.3. Способ по п.2, отличающийся тем, что находящийся под давлением поток черного щелока перемешивают статическим смесителем (2b).4. Способ по п.2, отличающийся тем, что находящийся под давлением поток черного щелока перемешивают диоксидом углерода, который вводят в поток в качестве подкисляющего агента, и/или вторичным потоком, отделенным от находящегося под давлением потока и снова направляемым в этот поток.5. Способ по п.1, отличающийся тем, что находящийся под давлением поток черного щелока подают в реакторе (2) при избыточном давлении от 200 до 1000 кПа.6. Способ по п.1, отличающийся тем, что черный щелок, содержащий лигнин, после сброса давления охлаждают до температуры от 40 до 60� РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК C07G 1/00 (13) 2013 117 995 A (2011.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2013117995/04, 14.10.2011 (71) Заявитель(и): ЮМП-Кюммене Корпорейшн (FI) Приоритет(ы): (30) Конвенционный приоритет: (72) Автор(ы): МИЕТТИНЕН Мауно (FI) ...

Способ выпаривания горячего черного щелока, который получают от процесса варки во время производства целлюлозной массы

Изобретение относится к целлюлозно-бумажной промышленности, а именно к способу выпаривания горячего черного щелока, полученного от процесса варки лиственных и смеси лиственных и хвойных пород древесины во время производства целлюлозной массы. В заявленном способе черный щелок вводят в многоступенчатое выпаривание и на первой стадии выпаривания последовательно вводят водные растворы поверхностно-активных веществ: неионогенного пентаоксиэтилированного эфира моноэтаноламида тридекановой кислоты формулы C12H25CONHCH2CH2O(С2Н4О)5H (НПАВ1), катионного поверхностно-активного вещества (КПАВ) додецилдиметилбензиламмоний хлорида формулы {С12Н25(СН3)2(СН2С6Н5)N}Cl и неионогенного поверхностно-активного вещества оксиэтилированного моноалкилфенола на основе тримеров пропилена формулы С9Н19С6Н4О(С2Н4О)6Н (НПАВ2). Изобретение позволяет увеличить выход пенообразующих веществ в виде сульфатного мыла при температуре поступающего на выпаривание щелока путем дополнительной коагуляции и деэмульгирования органических ...

Устройство для выпаривания растворов

1. УСТРОЙСТВО ДЛЯ ВЫПАРИВАНИЯ РАСТВОРОВ, содержащее вертикальный корпус, раз.мещенйые в нем одна под другой паровую камеру с теплообменйыми элементами и устайовленными йад йими распределител ми раствора и растворную камеру, патрубки дл  подачи исходной и отвода скойцейтрированной жидкости, патрубки дл  подачи и отвода греющего пара и отвода вторичного пара, циркул ционный насос и циркул ционную трубу, подключенные соответственно к растворйой камере и распределител м жидкости, отличающеес  тем, что, с целью предотвращени  вспенивани  раствора за счет регулировани  отбора скойцейтрированйого раствора, растворна  камера снабжена вертикальной перегородкбй , установлейной под теплообмеййыми элемейтами паровой камеры. 2. Устройство по п. 1, отличающеес  тем, что растворна  камера снабжейа установленной между теплообменными элементами i и вертикальной перегородкой направл ющей наклонной пластиной дл  отвода раство (Л ра на рециркул цию. О5 со О5 о to

MORE FLÜSSIGHEITSVERTEILER FOR EVAPORATORS

AS WELL AS PROCEDURE FOR THE PROCESSING OF USED AUFSCHLUSSFLUESSIKGEIT PLANTS FOR THE EXECUTION OF THE PROCEDURE

PROCEDURE FOR THE PRODUCTION OF FURFURAL, ACETIC ACID AND FORMIC ACID FROM USED UP CELLULOSE COOK CAUSTIC SOLUTION

Process for the isolation of lignin from an alkaline process stream

Bei einem Verfahren zur Isolierung von Lignin aus einem alkalischen Prozessstrom, insbesondere eingedickter Schwarzlauge wird der alkalische Prozessstrom in einem unteren Bereich von wenigstens einem zwei konzentrisch angeordnete Reaktorzonen aufweisenden Kreislaufreaktor (1) kontinuierlich eingebracht, wobei ein Flüssigkeitsniveau (10) des alkalischen Prozessstroms im Inneren des wenigstens einen Kreislaufreaktors (1) im Wesentlichen auf einem Niveau mit einem Oberende (7) einer inneren rohrförmigen Reaktorzone (6) gewählt wird, wobei ein CO2 haltiges Gas von unten in die innere rohrförmige Reaktorzone (6) des wenigstens einen Kreislaufreaktors (1) kontinuierlich eingeblasen wird, wobei das CO2 haltige Gas in der inneren rohrförmigen Reaktorzone (6) von dem alkalischen Prozessstrom absorbiert wird und Abgas gemeinsam mit Restmengen des CO2 am Kopf des wenigstens einen Kreislaufreaktors (1) abgezogen werden, wobei das Verfahren bei Umgebungsdruck, insbesondere 1 atm geführt wird und an ...

Process for the isolation of lignin from an alkaline process stream

Bei einem Verfahren zur Isolierung von Lignin aus einem alkalischen Prozessstrom, insbesondere eingedickter Schwarzlauge wird der alkalische Prozessstrom in einem unteren Bereich von wenigstens einem zwei konzentrisch angeordnete Reaktorzonen aufweisenden Kreislaufreaktor (1) kontinuierlich eingebracht, wobei ein Flüssigkeitsniveau (1 0) des alkalischen Prozessstroms im Inneren des wenigstens einen Kreislaufreaktors (1) im Wesentlichen auf einem Niveau mit einem Oberende (7) einer inneren rohrförmigen Reaktorzone (6) gewählt wird, wobei ein C02 haltiges Gas von unten in die innere rohrförmige Reaktorzone (6) des wenigstens einen Kreislaufreaktors (1) kontinuierlich eingeblasen wird, wobei das C02 haltige Gas in der inneren rohrförmigen Reaktorzone (6) von dem alkalischen Prozessstrom absorbiert wird und Abgas gemeinsam mit Restmengen des C02 am Kopf des wenigstens einen Kreislaufreaktors (1) abgezogen werden, wobei das Verfahren bei Umgebungsdruck, insbesondere 1 atm geführt wird und an ...

VERFAHREN FUER DIE GEWINNUNG VON SCHWEFELVER- BINDUNGEN

METHOD FOR TREATMENT AND RECYCLING OF PULP MILL BLEACH PLANT EFFLUENTS

METHOD FOR THE RECOVERY OF SULPHUR COMPOUNDS, VOLATILE ALCOHOLS, TURPENTINE AND THE LIKE PRODUCED IN CONNECTION WITH PULPING

RADIAL CONFIGURATION OF EVAPORATOR HEATING ELEMENTS

RADIAL CONFIGURATION OF EVAPORATOR HEATING ELEMENTS A free flow evaporator of the falling film type has the heating elements disposed in a circular configuration so that each extends radially a distance less than the interior radius of the evaporator cylindrical vessel. Heating vapor is introduced concentrically into the top of the vessel and passes into the tops of the heating elements, and condensate is withdrawn from the bottoms of the heating elements in the vessel. Excess vapor passes through a vapor vent in the bottom of the vessel. The boiling liquid, such as black liquor from paper pulp processing, is introduced through a header above an annular channel with a perforated plate bottom, the perforated plate being disposed on top of the heating elements. The evaporated liquid vapor passes radially outwardly in the vessel, and then upwardly, and is discharged from the top of the vessel and passes to the top of another vessel (providing another effect), to provide heating vapor to the ...

System and Method for Conditioning a Hardwood Pulp Liquid Hydrolysate

A system and method for hardwood pulp liquid hydrolysate conditioning includes a first evaporator receives a hardwood mix extract and outputting a quantity of vapor and extract. A hydrolysis unit receives the extract, hydrolyzes and outputs to a lignin separation device, which separates and recovers a quantity of lignin. A neutralization device receives extract from the lignin separation device and a neutralizing agent, producing a mixture of solid precipitate and a fifth extract. The solid precipitate is removed from the fifth extract. A second evaporator removes a quantity of acid from the fifth extract in a vapor form. This vapor may be recycled to improve total acid recovery or discarded. A desalination device receives the diluted extract, separates out some of the acid and salt and outputs a desalinated solution.

METHOD FOR RECOVERING CHEMICALS AND BY-PRODUCTS FROM HIGH-SULPHIDITY PULPING LIQUORS

A method used in connection with the recovery of pulping chemicals from spent pulping liquor produced by kraft-type pulping at very high sulphidity. In the method, spent pulping liquor is acidified to a relatively low pH which converts a most or all of the sulphide and hydrosulphide in the liquor to hydrogen sulfide. Sulphur containing gases released from the acidification of the spent pulping liquor, together with other sulphur gases collected at the pulp mill, are converted into an acid compound. This acid compound is employed as an acidification agent in the acidification of the spent pulping liquor. The amount of acid compound generated by the conversion of sulphur containing gases may be sufficient to provide most, if not all, of the acid needed for the acidification of the spent pulping liquor. 1. A method to be used in connection with recovery of pulping chemicals from spent pulping liquor produced by kraft-type alkaline pulping at very high sulphidity , the method comprising:a) acidifying the spent pulping liquor in one or more stages to a pH low enough to convert at least a large portion of both hydrosulphide ions and the sulphide ions in the spent pulping liquor into hydrogen sulphide,b) converting to an acid compound sulphur containing gases released in the acidification process of step a), wherein the sulphur containing gases comprise hydrogen sulphide, andc) the acid compound generated in step b) is employed in step a) and the amount of the acid compound generated in step b) is sufficient in quantity to provide at least most of the acid required in step a).2. The method as in claim 1 , wherein the sulphidity employed in the pulping stage is in the range of 50 percent to 100 percent.3. The method as in claim 1 , wherein the pH reached in the acidification step is below 7.4. The method as in claim 1 , wherein claim 1 , in conjunction with the acidification of the spent pulping liquor in step a) claim 1 , one or more by-products are partially or totally ...

KRAFT PULP MILL SCALE CONTROL WITH END GROUP MODIFIED POLYCARBOXYLATES

Scale build-up on metal surfaces of a black liquor evaporator is prevented or mitigated by treating the black liquor with a deposit inhibiting concentration of a water-soluble polymer containing a polycarboxylate chain and a 3-mercaptopropionic acid end group. 1. A method for inhibiting scale build-up on metal surfaces of a black liquor evaporator , the method comprising treating the black liquor with a deposit inhibiting concentration of a water-soluble polymer comprising a polycarboxylate chain and a 3-mercaptopropionic acid end group.2. The method according to claim 1 , wherein the water-soluble polymer has general structure R1-R2-R3 claim 1 , wherein R2 is a polycarboxylate claim 1 , R1 and R3 are independently hydrogen or an end group claim 1 , and at least one of R1 and R3 is the end group —S—CHCHCOOH.3. The method according to claim 1 , wherein the water-soluble polymer comprises a homopolymer or copolymer of acrylic acid.4. The method according to claim 1 , wherein the concentration of the water-soluble polymer in the black liquor is 100 ppm or greater.5. The method according to claim 1 , wherein the water-soluble polymer has a weight average molecular weight of 2000 to 12000 daltons.6. The method according to claim 1 , wherein the water-soluble polymer is a homopolymer or copolymer of acrylic acid chain terminated with 3-mercaptopropionic acid.7. A composition comprising black liquor and 50 ppm or more of a water-soluble polymer comprising a polycarboxylate chain and a 3-mercaptopropionic acid end group.8. The composition according to claim 7 , wherein the black liquor has at least 50% solids by weight.9. The composition according to claim 7 , wherein the water-soluble polymer has general structure R1-R2-R3 claim 7 , wherein R2 is a polycarboxylate claim 7 , R1 and R3 are independently hydrogen or an end group claim 7 , and at least one of R1 and R3 is the end group —S—CHCHCOOH.10. The composition according to claim 7 , wherein the water-soluble polymer ...

BOILER SYSTEM CONTROLLING FUEL TO A FURNACE BASED ON TEMPERATURE OF A STRUCTURE IN A SUPERHEATER SECTION

A boiler system is provided comprising: a furnace adapted to receive a fuel to be burned to generate hot working gases; a fuel supply structure associated with the furnace for supplying fuel to the furnace; a superheater section associated with the furnace and positioned to receive energy in the form of heat from the hot working gases; and a controller. The superheater section may comprise a platen including a tube structure with an end portion and a temperature sensor for measuring the temperature of the tube structure end portion and generating a signal indicative of the temperature of the tube structure end portion. The controller may be coupled to the temperature sensor for receiving and monitoring the signal from the sensor. 1. A boiler system comprising:a furnace adapted to receive a fuel to be burned to generate hot working gases;a fuel supply structure associated with said furnace for supplying fuel to said furnace; a platen including a tube structure with an end portion; and', 'a temperature sensor for measuring the temperature of the tube structure end portion and generating a signal indicative of the temperature of said tube structure end portion; and, 'a superheater section associated with said furnace and positioned to receive energy in the form of heat from the hot working gases, said superheater section comprisinga controller coupled to said temperature sensor for receiving and monitoring the signal from said sensor.2. The boiler system as set out in claim 1 , wherein said temperature sensor comprises a thermocouple.3. The boiler system as set out in claim 1 , wherein said controller monitors the signal from said temperature sensor for rapid changes in temperature of said tube structure end portion.4. The boiler system as set out in claim 3 , wherein rapid changes in temperature of said tube structure end portion comprises a monotonic increase in temperature of least about 25 degrees F. occurring over a time period of between about one to five minutes ...

FURNACE FLOOR PROTECTION IN RECOVERY BOILERS

A method and apparatus for protecting a furnace floor of a black liquor recovery boiler, where the furnace floor is covered by a protective layer, the protective layer being formed of a salt mixture including at least two different salts. 1. A method for protecting a furnace floor of a black liquor recovery boiler , comprising:providing a mixture comprising at least two different salts; andcovering an emptied furnace floor by a layer formed of the mixture comprising at least two different salts.2. The method of claim 1 , wherein the mixture comprises at least one sodium salt.3. The method of claim 1 , wherein the mixture comprises at least one sulfate.4. The method of claim 1 , wherein the mixture comprises at least one carbonate.5. The method of claim 1 , wherein the mixture comprises sodium sulfate.6. The method of claim 1 , wherein the mixture comprises sodium carbonate.7. The method of claim 1 , wherein the mixture comprises sodium sulfide.8. The method of claim 1 , wherein the mixture comprises sodium chloride.9. The method of claim 1 , wherein the mixture consists of two or three different salts claim 1 , each salt being a sodium salt.10. The method of claim 1 , wherein the mixture comprises at least one potassium salt.11. The method of claim 1 , wherein the mixture comprises at least two salts selected from the group of sodium carbonate claim 1 , sodium sulfate claim 1 , sodium sulfide claim 1 , sodium chloride claim 1 , potassium carbonate claim 1 , and potassium sulfate.12. The method of claim 11 , wherein the mole fraction of said at least two salts selected from the group in the mixture is more than 90%.13. The method of claim 1 , wherein the provided mixture has a melting point lower than or equal to 850° C.14. The method of claim 1 , wherein the covering the furnace floor by a protective layer is performed by covering the furnace floor by said mixture by flowing the mixture onto the furnace floor.15. The method of claim 1 , comprising pumping the ...

HEAT TRANSFER TUBE AND METHOD FOR MANUFACTURING A HEAT TRANSFER TUBE

The invention relates to a heat transfer tube () for falling film evaporation having a heating medium surface () to be heated by a heating medium, a falling film surface () to have spent liquor passing over it, and being made from an iron based high alloy stainless steel material with an alloy content above 16.00% for Chromium and above 1% for Nickel. The falling film surface of the heat transfer tube is equipped with one or several protrusions/indentations forming a multitude of stamped bumps (SB) on the envelope surface of a heat transfer tube such that the distance between adjacent stamped bumps (SB) along a line on the envelope surface parallel to the longitudinal axis of the heat transfer tube is within the range of 3 to 250 mm, said stamped bumps (SB) having a height (hp) in the range 0.3 to 5.0 mm, a width (wp) in the range 1.0-20 mm, and an inclination angle (a) versus a plane orthogonal to a longitudinal axis (CC) of the heat transfer tube in a range of 0-70 degrees so that each stamped bump (SB) is inclined and extends along at least a portion of the heat transfer tube or extend within a plane orthogonal to the longitudinal axis of the heat transfer tube. The invention also relates to a method for manufacturing said heat transfer tube. 29. A heat transfer tube () according to wherein said stamped bumps (SB) are stretching continuously from one side of the sheet metal plate to the other side of the sheet metal plate of which the tube is made.3920. A heat transfer tube () according to wherein said stamped bumps (SB) are protruding on the falling film surface ().49. A heat transfer tube () according to claim 1 , wherein the distance along the longitudinal axis of the heat transfer tube between adjacent stamped bumps is in the range 3-100 mm claim 1 , more preferably within the range 5-50 mm and most preferably within the range 5-20 mm.59. A heat transfer tube () according to claim 1 , wherein the height (h) of said stamped bumps (SB) are in the range 0.5-2.0 ...

Apparatus and method for cleaning smelt spouts and smelt discharge openings of a chemicals recovery furnace or boiler

An apparatus comprising a cleaning rod driven in reciprocating, axial extension (y) and retraction (x) movements upon cleaning a smelt discharge opening of a chemicals recovery boiler, wherein a linear actuator is controllable for driving the cleaning rod in the axial movements. A pivot actuation means is controllable for pivoting the cleaning rod about an axis (S) upon cleaning a smelt spout associated with the smelt discharge opening, wherein one or more sensors are arranged to provide control basis for correlation of the axial movements (x; y) with the change in pivot angle (φ) during pivoting of the cleaning rod. A method to be performed in use of the apparatus is likewise disclosed.

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- ...

Efficient methods and compositions for recovery of products from organic acid pretreatment of plant materials

The invention is directed to compositions and processes concerning efficient downstream processing of products derived from organic acids pretreatment of plant materials.

BLACK LIQUOR VISCOSITY REDUCING AND ANTI-SCALE AGENT

The disclosure provides methods and compositions for reducing the viscosity of black liquor. Also provided are methods of inhibiting deposition of scale and methods of processing black liquor. In some embodiments, the compositions include a carboxylate-containing polymer and an inorganic salt. In some embodiments, the compositions include a carboxylate-containing polymer, an inorganic salt, and a surfactant. 1. A composition , comprising:a carboxylate-containing polymer;an inorganic salt; anda surfactant.2. The composition of claim 1 , wherein the carboxylate-containing polymer comprises a weight average molecular weight from about 500 Da to about 5 claim 1 ,000 Da.3. The composition of claim 1 , wherein the carboxylate-containing polymer is selected from the group consisting of a polymer comprising a polyacrylate claim 1 , a polymer comprising a sulfonate and a nonionic monomer claim 1 , and any combination thereof.4. The composition of claim 3 , wherein the polymer comprising the polyacrylate further comprises a phosphonate.5. The composition of claim 4 , wherein the phosphonate is selected from the group consisting of a vinyl phosphonate claim 4 , a vinyl diphosphonate claim 4 , an allyl phosphonate claim 4 , and any combination thereof.6. The composition of claim 3 , wherein the nonionic monomer is selected from the group consisting of acrylamide claim 3 , methacrylamide claim 3 , N-methyl (meth)acrylamide claim 3 , (meth)alkyl acrylamide claim 3 , N claim 3 ,N′-dimethyl (meth)acrylamide claim 3 , dialkyl (meth)acrylamide claim 3 , 3-(dimethylamino)propyl methacrylamide (DMAPMA) claim 3 , 3-(dimethylamino)propyl acrylamide (DMAPA) claim 3 , N-vinyl pyrrolidone (NVP) claim 3 , styrene claim 3 , an alkyl styrene claim 3 , a vinyl ether claim 3 , an allylic ether claim 3 , and any combination thereof.7. The composition of claim 1 , wherein the carboxylate-containing polymer is sodium polyacrylate.8. The composition of claim 1 , wherein the inorganic salt is ...

BOILER SYSTEM CONTROLLING FUEL TO A FURNACE BASED ON TEMPERATURE OF A STRUCTURE IN A SUPERHEATER SECTION

A boiler system is provided comprising: a furnace adapted to receive a fuel to be burned to generate hot working gases; a fuel supply structure associated with the furnace for supplying fuel to the furnace; a superheater section associated with the furnace and positioned to receive energy in the form of heat from the hot working gases; and a controller. The superheater section may comprise a platen including a tube structure with an end portion and a temperature sensor for measuring the temperature of the tube structure end portion and generating a signal indicative of the temperature of the tube structure end portion. The controller may be coupled to the temperature sensor for receiving and monitoring the signal from the sensor. 1. A boiler system comprising:a furnace adapted to receive a fuel to be burned to generate hot working gases;a fuel supply structure associated with said furnace for supplying fuel to said furnace; a platen including a tube structure with an end portion; and', 'a temperature sensor for measuring the temperature of the tube structure end portion and generating a signal indicative of the temperature of said tube structure end portion; and, 'a superheater section associated with said furnace and positioned to receive energy in the form of heat from the hot working gases, said superheater section comprisinga controller coupled to said temperature sensor for receiving and monitoring the signal from said sensor.2. The boiler system as set out in claim 1 , wherein said temperature sensor comprises a thermocouple.3. The boiler system as set out in claim 1 , wherein said controller monitors the signal from said temperature sensor for rapid changes in temperature of said tube structure end portion.4. The boiler system as set out in claim 3 , wherein rapid changes in temperature of said tube structure end portion comprises a monotonic increase in temperature of least about 25 degrees F. occurring over a time period of between about one to five minutes ...

ACOUSTIC EMISSION SYSTEM AND METHOD FOR PREDICTING EXPLOSIONS IN DISSOLVING TANK

The present disclosure describes a system for predicting explosions in a dissolving tank. The system includes acoustic emission sensors placed in or around the dissolving tank. By filtering the recorded frequencies to the range which is most sensitive for desired explosions “fingerprints,” it is possible to predict a smelt influx before the smelt influx occurs as well as program response actions to prevent compromising explosions. 1. A system comprising:a dissolving tank adjacent to a recovery boiler,a smelt spout having a first end proximate a recovery boiler and a second end opposite the first end, the second end being proximate a dissolving tank, wherein the smelt spout is configured to receive a smelt from the recovery boiler and convey the smelt to the dissolving tank;an acoustic emission sensor having a reading end configured to detect acoustic emissions emanating from the smelt contacting a liquid in the dissolving tank, and wherein the acoustic emission sensor has a transducer in signal communication with the reading end, and wherein the transducer is configured to transduce the acoustic emissions into an initial electric signal;a pre-processor configured amplify, filter, and digitize the initial electric signal to produce a pre-processed signal having a frequency of greater than 20 KHz, wherein the pre-processor is disposed downstream of the transducer;a data processor in signal communication with the pre-processor, wherein the data processor is configured to transform the pre-processed signal with a transformation method to produce an output signal, wherein the output signal comprises a first set of processed waveforms representative of a first rate of smelt flow, and a second set of waveforms representative of a second rate of smelt flow, the second set of processed waveforms having amplitude peaks exceeding the first set of processed waveforms by more than 200% to comprise a pre-influx fingerprint.2. The system of further comprising the smelt disposed in ...

A METHOD AND A SYSTEM FOR ADJUSTING PH OF GREEN LIQUOR DREGS

The specification relates to a method and a system for adjusting pH of green liquor dregs. The method comprises contacting a slurry containing green liquor dregs () with flue gas (). The system comprises a recovery boiler () configured to burn black liquor to produce smelt, a smelt dissolving tank () configured to dissolve the smelt to produce green liquor comprising green liquor dregs, and a green liquor clarifier/filter () and/or a dregs filter () configured to separate a slurry containing green liquor dregs () from the green liquor. The system further comprises a vessel () configured to receive a slurry containing green liquor dregs () and a gas inlet () configured to convey flue gas () to be contacted with the slurry containing green liquor dregs (). 114-. (canceled)15. A method for adjusting pH of green liquor dregs , the method comprising:{'b': 100', '200', '300', '400', '500', '101', '201', '301', '401', '501, 'contacting a slurry containing green liquor dregs (, , , , ) with flue gas (, , , , ),'} [{'b': 100', '200', '300', '400', '500', '103', '104', '100', '200', '300', '400', '500, 'the slurry containing green liquor dregs (, , , , ) originates from a green liquor clarifier/filter () and/or a dregs filter () configured to separate the slurry containing green liquor dregs (, , , , ) from green liquor,'}, {'b': 100', '200', '300', '400', '500, 'a dry solids content of the slurry containing green liquor dregs (, , , , ) is from 1 to 40 wt. %,'}, {'b': 101', '201', '301', '401', '501, 'the flue gas (, , , , ) contains carbon dioxide, and'}, {'b': 101', '201', '301', '401', '501, 'a pH of the green liquor dregs after contacting with the flue gas (, , , , ) is between 7-9.'}], 'wherein16. The method according to claim 15 , wherein a temperature of the slurry containing green liquor dregs is at most 150° C. and a temperature of the flue gas is at most 400° C.17. The method according to claim 16 , wherein a dry solids content of the slurry containing green liquor ...

A PROCESS FOR MANUFACTURING AN UPGRADED BIO-OIL FROM BLACK LIQUOR

The present invention relates to a process for manufacturing an upgraded bio-oil derived from black liquor, comprising the following steps: —Providing black liquor, which comes from the pulp and paper manufacturing industry; —Subjecting black liquor to a pyrolysis treatment with formation of a pyrolyzed black liquor gas and a solid mass, which comprises char and salts; —Catalytic conversion of said pyrolyzed black liquor gas by contacting at least part of the latter with a bi-metallic modified zeolite catalyst with formation of the upgraded bio-oil, which comprises benzene, toluene, xylene (BTX), naphthalene and non-BTX products. 1. A process for manufacturing an upgraded bio-oil derived from a black liquor , comprising the following steps:providing the black liquor;subjecting the black liquor to a pyrolysis treatment and forming a pyrolyzed black liquor gas and a solid mass wherein the solid mass; comprises char and salts;forming the upgraded bio-oil, which comprises benzene, toluene, xylene (BTX), naphthalene, and non-BTX products, through catalytic conversion of the pyrolyzed black liquor gas by contacting at least part of the pyrolyzed black liquor gas with a bi-metallic modified zeolite catalyst.2. The process according to claim 1 , wherein a first metal and a second metal are incorporated into said catalyst.3. The process according to claim 1 , wherein said first metal is a transition metal selected from Group IIB of the periodic table and wherein said second metal consists of:a. one metallic element selected from the Lanthanide series of the periodic table having an atomic number ranging from 57 to 60; orb. a transition metal of Group IB of the periodic table; orc. a transition metal of Group VIB of the periodic table.4. The process according to claim 2 , wherein said support catalyst has a silica alumina molar ratio from 5 to 300.5. The process according to claim 2 , wherein the support catalyst has an internal pore size distribution in the range of 4.5 to ...

Advanced Methods for Sugar Production from Lignocellulosic Biomass and Fermenting Sugars to Microbial Lipids

Methods for facilitating sugar release from lignocellulosic biomass and for utilizing the sugars for microbial lipid (e.g. biofuel) production are provided. The methods involve pretreating lignocellulosic biomass using various oxidizing agents (ozone, peroxone, etc.) at a temperature not higher than 50° C. and pressure no higher than 1.5 atm to render the biomass more accessible to enzymatic hydrolytic degradation into sugars and utilizing soluble sugars for fermenting oleaginous microorganism to produce microbial lipids. 1. A method of pretreating lignocellulosic biomass prior to enzymatic hydrolytic saccharification , comprising{'sub': 2', '2, 'mixing said biomass with an HOsolution prepared in water to form 0% to 90% (w/w) moisture content of biomass and'}{'sub': 2', '2, 'exposing said biomass/HOmixture to ozone gas, wherein said step of exposing is carried out at a temperature of 15° C. to 30° C.'}2. The method of claim 1 , wherein said method includes a step of sizing said biomass prior to said step of mixing.3. The method of claim 1 , wherein said step of exposing is carried out for a time period ranging from about 1 to about 20 minutes.4. The method of claim 3 , wherein said step of exposing is carried out for at least about 15 minutes.5. The method of claim 1 , wherein said step of exposing is followed by one or both of a step of rinsing and a step of drying claim 1 , prior to said enzymatic hydrolytic saccharification.6. The method of claim 1 , wherein sugars obtained from said enzymatic hydrolytic saccharification are used for lipid production by oleaginous microorganisms.7. A method of pretreating biomass prior to enzymatic hydrolytic saccharification claim 1 , comprisingexposing said biomass to ozone at a temperature of 15° C. to 30° C., andcontacting ozone-exposed biomass with aqueous ammonia at a temperature of or below about 50° C. and pressure lower than 1 atm.8. The method of claim 7 , wherein said method includes a step of sizing said biomass prior ...

Conditioning of so2-ethanol-water spent liquor for fermentation by clostridia

The present invention relates to producing chemicals and biofuels from wood material, e.g. mixed forest biomass. Specifically, the invention concerns a process for conditioning spent liquor produced by SO 2 -ethanol-water (SEW) fractionation of wood chips for fermentation to butanol, ethanol and acetone/isopropanol (so called ABE process) by Clostridia bacteria.

CATALYST FREE ORGANOSOLV PROCESS, SYSTEM AND METHOD FOR FRACTIONATION OF LIGNOCELLULOSIC MATERIALS AND BIOPRODUCTS RECOVERY

A catalyst free organosolv process for a more efficient delignification and bio-product production by fractionating lignocellulosic materials comprises of providing one or more lignin dissolving chemicals with water and placing it in contact with lignocellulosic biomass. The process also includes producing used solvent as a result of placing biomass in contact with lignin dissolving chemicals and water, separating it into organic and aqueous layers, extracting poly lignin from the organic layer to produce recyclable lignin dissolving chemicals, and extracting dissolved solid from the aqueous layer to produce recyclable water. The catalyst free organosolv process can use any combination of fresh, used, or recyclable water and lignin dissolving chemicals, with or without any pH adjustment and placing them in contact with any biomass in process, or any new biomass. The recyclable lignin dissolving chemicals can be further separated to remove any excess or desired organic chemicals from it. The separated chemicals can be recycled as new lignin dissolving solvent or sold, while poly lignin can be used as a natural and renewable colorant for other polymers such as poly lactic acid, or can be mixed with other polymers as an additive and be compounded, co-extruded, injected to make consumable polymeric parts, or can be used as a natural source of renewable aromatics. Application of the catalyst free organosolv process helps to preserve fiber strength which is important for certain applications. At the end, the catalyst free organosolv fractionation process produces good quality fibers, various organic chemicals, and poly lignin that together make the process very economically attractive. 1) A catalyst free organosolv process for producing bio-products by fractionating and decomposing lignocellulosic materials comprising:A) providing an initial solvent comprising of a quantity of water and a quantity of one or many lignin dissolving chemicals such as alcohol like butanol, ...

METHOD AND SYSTEM FOR TREATING SPENT PULPING LIQUOR

A system () for treating spent pulping liquor () comprising lignin to provide green liquor () is disclosed. The system () comprises an evaporator (), a recovery boiler (), at least one filter (), and a green liquor plant (). The evaporator () concentrates a first stream () of the spent pulping liquor () to provide a concentrated pulping liquor (). The recovery boiler () incinerates the concentrated pulping liquor () to provide a smelt (). The at least one filter () filters a second stream () of the spent pulping liquor () to remove lignin therefrom to provide a permeate (). The green liquor plant () is for dissolving the smelt () from the recovery boiler () in the permeate () from the at least one filter () to provide green liquor (). Also disclosed is a method for treating spent pulping liquor () to provide green liquor (). 1. A system for treating spent pulping liquor comprising lignin to provide green liquor , the system comprising:an evaporator for concentrating a first stream of the spent pulping liquor to provide a concentrated pulping liquor;a recovery boiler for incinerating the concentrated pulping liquor to provide a smelt;at least one filter for filtering a second stream of the spent pulping liquor to remove lignin therefrom to provide a permeate; anda green liquor plant for dissolving the smelt from the recovery boiler in at least a part of the permeate from the at least one filter to provide green liquor.2. The system of claim 1 , wherein the at least one filter comprises:a first filter for filtering the second stream of the spent pulping liquor to provide a first retentate and a first permeate; anda second filter for filtering the first permeate to provide a second retentate and a second permeate;wherein the second permeate is used to dissolve the smelt in the green liquor plant.3. The system of claim 2 , wherein the first filter is a membrane filter with a molecular weight cut-off between 0.5 and 20 kDa and the second filter is a membrane filter with ...

RECOVERY BOILER STARTUP BURNER ASSEMBLY

A startup burner assembly for a recovery boiler, the startup burner assembly includes a housing having a burner end and a second end distal to the burner end; a main fuel conduit disposed within the housing; and high-pressure air conduits disposed within the burner end of the housing. The high-pressure air conduits include angled air injection nozzles configured to direct high-pressure air exiting the burner end of the startup burner assembly in a rotational direction.

COMBUSTION OF STREAMS DERIVED FROM HOT WATER EXTRACTION OF WOOD MATERIAL

Various techniques are described for enhanced combustion of hot water extraction (HWE) derived liquor. For example, the HWE derived liquor can be pre-treated prior to introduction into a combustion chamber. The pre-treatment can include subjecting HWE derived liquor to filtration to remove suspended solids, evaporation to produce a first stage concentrated HWE liquor; additional concentration to produce a second stage concentrated HWE liquor; additional filtration to remove additional suspended solids; and pre-heating to produce a preheated HWE liquor. The preheated HWE liquor can be atomized and combined with pre-heated combustion air supplied into a combustion chamber to effect combustion of the HWE derived liquor. 1. A process for combusting hot water extraction (HWE) derived liquor , comprising:subjecting HWE derived liquor to filtration to remove suspended solids and produce a solids-depleted HWE derived liquor;supplying the solids-depleted HWE derived liquor to an evaporator system to produce a first stage concentrated HWE derived liquor;supplying the first stage concentrated HWE derived liquor to a concentrator or evaporator to produce a second stage concentrated HWE derived liquor;subjecting the second stage concentrated HWE derived liquor to additional filtration to remove additional suspended solids and produce a filtered concentrated HWE derived liquor;pre-heating the filtered concentrated HWE derived liquor to produce a preheated HWE derived liquor;subjecting the preheated HWE derived liquor to atomization to produce an atomized HWE derived liquor;pre-heating air to produce heated combustion air; andsupplying the atomized HWE derived liquor and the heated combustion air into a combustion chamber to effect combustion of the HWE derived liquor.2. The process of claim 1 , wherein the filtration and/or the additional filtration is performed using a strainer type separator claim 1 , a basket separator claim 1 , a belt filter and/or a drum filter.3. The ...

CONTINUOUS METHOD FOR THE PRECIPITATION OF LIGNIN FROM BLACK LIQUOR

In a method for the continuous precipitation of lignin from black liquor black liquor is provided so as to flow as a pressurized flow in a reactor with a dwell time of less than 300 s. An acidifying agent selected from the group of carbon dioxide, acid and their combinations is led to the flow at one or more feeding sites to lower the pH of black liquor. The pH is allowed to decrease by the effect of the acidifying agent in the pressurized flow to the precipitation point of lignin, the pressure of the pressurized flow is abruptly released, and lignin particles are separated from black liquor. 1. An apparatus for the continuous precipitation of lignin from black liquor , comprising a reactor and means for leading an acidifying agent into the reactor , wherein the reactor is a continuous reactor that includes a pressurized portion wherein black liquor is arranged to flow as a pressurized flow , the pressurized portion includes one or more acidifying agent feeding sites that are connected to a source of acidifying agent to lead the acidifying agent to the pressurized flow at said one or more acidifying agent feeding sites , and the pressurized portion ends at a pressure release valve that is arranged to release the pressure of the pressurized flow.2. The apparatus according to claim 1 , wherein claim 1 , disposed after the acidifying agent feeding site in the reactor claim 1 , there is a static mixer that is arranged to provide turbulent mixing of the flow.3. The apparatus according to claim 1 , wherein the acidifying agent and/or a secondary flow separated from the pressurized flow are arranged to be led to the pressurized flow at the feeding site at such a pressure as to provide turbulent mixing of the flow.4. The apparatus according to claim 1 , wherein it comprises a filter that is arranged to separate lignin particles from black liquor.5. The apparatus according to claim 4 , wherein the filter is a pressure filter.6. The apparatus according to wherein claim 4 , ...

Flue gas heat recovery method and system

The invention relates to a method for recovering heat from flue gas generated at a power plant or biomass-based plant, such as a pulp mill, and for concentrating a liquid at a multiple-effect evaporation plant having a plurality of evaporation effects, in which the heating medium and liquid flow counter-currently. Flue gas from a combustion device is directed through a channel into an indirect contact with a liquid to be concentrated, wherein the liquid is heated with heat from the flue gas in a flue gas cooler having at least one indirect heat exchange stage. The heated liquid is extracted from the flue gas cooler and flashed in at least one flashing stage so as to produce flash cooled liquid and flash vapor. The vapor is used as a heating medium in an evaporation stage or stages of the multiple-effect evaporation plant. The flash cooled liquid is circulated into the flue gas cooler.

Continuous fractionation of crude tall oil to refined tall diesel

The present invention describes a process for continuous fractionation of CTO (crude tall oil) to RTD (refined tall diesel), said process comprising:- when removing a stream of TOP (tall oil pitch) the CTO is fed though at least two evaporation zones arranged in series so that one stream of CTO is fed from a first evaporation zone to a second evaporation zone, wherein a TOP stream is produced and fed from the second evaporation zone, wherein a first vapor stream is produced within the first evaporation zone and a second vapor stream is produced within the second evaporation zone and wherein there is a temperature difference of at least 10°C between the first vapor stream and the second vapor stream; and - feeding the first vapor stream and the second vapor stream into a subsequent fractionation column to produce a stream of RTD from the fractionation column, wherein the first vapor stream and the second vapor stream are being fed to different positions, relative to the column height, in the fractionation column, which different positions in the fractionation column are separated by packing means.

Foerfarande foer taeckande av kemikaliefoerlusterna vid massaframstaellning

Method and system for high alpha dissolving pulp production

사전 가수분해 크라프트 공정(PHKP)과 연관하여 사용된 본 발명의 펄프 처리를 위한 방법은, 반응 용기에 목재 칩 또는 유사한 재료를 추가하는 단계와, 사전 가수분해를 수행하는 단계와, 제1 양의 백액에 뒤이어 백액으로 선택적으로 농화된 저온 가성 추출 알칼리 여과액과 같은 다른 용제로 혼합물을 중화하는 단계를 포함한다. 중화 유체는, 선택적으로 백액으로 농화된, 알칼리 여과액 및 고온 흑액을 포함하는 쿠킹 유체로 치환된다. 쿠킹 유체는 비교적 높은 유효 알칼리 농도를 가질 수 있다. 쿠킹된 펄프는 선택적인 범위 내에서 카파값 및 매우 낮은 잔류 헤미셀룰로오스를 나타낼 수 있다. A method for pulping treatment of the present invention used in connection with a pre-hydrolysis kraft process (PHKP) comprises the steps of adding a wood chip or similar material to a reaction vessel, performing pre-hydrolysis, And neutralizing the mixture with another solvent such as a low temperature caustic extracted alkali filtrate which is selectively concentrated with a white liquid following the white liquor. The neutralizing fluid is optionally replaced with a cooking fluid comprising an alkaline filtrate and a high-temperature black liquid, which is concentrated to a white liquid. The cooking fluid may have a relatively high effective alkali concentration. The cooked pulp may exhibit a kappa value and a very low residual hemicellulose within an optional range.

Continuous process for controlled evaporation of black liquor

Described is a process for concentrating weak black liquor to form strong black liquor, said process comprising: a) preconcentrating said weak black liquor; b) heating said preconcentrated weak black liquor in a heating zone under sufficient pressure to prevent said preconcentrated weak black liquor from boiling in said heating zone; c) passing said preconcentrated weak black liquor, having at least one volatile component, into an evaporation zone through one or more orifices; d) applying pressure in said evaporation zone that is lower than the vapor pressure of said preconcentrated weak black liquor as it is passed into said evaporation zone, which allows for flash evaporation of at least a portion of said at least one volatile component of said preconcentrated weak black liquor from said preconcentrated weak black liquor to form strong black liquor; e) adjusting heat in said heating zone., pressure in said heating zone and pressure in said evaporation zone to allow for evaporation of an amount of said at least one volatile component from said preconcentrated weak black liquor to form said strong black liquor; and f) collecting said strong black liquor from said evaporation zone.

Method of monitoring and inhibition of sediment formation in evaporator and concentrator of pulp plant

FIELD: woodworking industry. SUBSTANCE: method comprises attaching the device for monitoring of precipitation of black liquor to the evaporator or the concentrator of pulp plant and measurement of thermal conductivity on the outer surface of this device. The control unit interprets the measured thermal conductivity and determines the level of sediment formation. If the sediment formation level higher than the predetermined level, the control unit can add the composition inhibiting sediment formation to the waste liquor. The composition inhibiting sediment formation comprises (i) one or more fatty acids of vegetable origin, and (ii) one or more compounds selected from the group consisting of polyacrylic acid, polymaleic acid, a copolymer of acrylic acid and maleic acid, and any of their combinations. EFFECT: improvement of the method. 10 cl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 493 310 (13) C2 (51) МПК D21C 11/10 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009140473/12, 09.05.2008 (24) Дата начала отсчета срока действия патента: 09.05.2008 (73) Патентообладатель(и): Налко Компани (US) (43) Дата публикации заявки: 20.06.2011 Бюл. № 17 2 4 9 3 3 1 0 (45) Опубликовано: 20.09.2013 Бюл. № 26 (56) Список документов, цитированных в отчете о поиске: ЕР 0517453 A1, 09.12.1992. CA 1307878 C, 29.09.1992. EP 0334398 A2, 27.09.1989. US 4783314 A, 08.11.1988. US 2005025659 A1, 03.02.2005. US 6250140 B1, 26.06.2001. 2 4 9 3 3 1 0 R U (86) Заявка PCT: US 2008/063152 (09.05.2008) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 10.12.2009 (87) Публикация заявки РСТ: WO 2008/141121 (20.11.2008) Адрес для переписки: 191036, Санкт-Петербург, а/я 24, "НЕВИНПАТ" (54) СПОСОБ МОНИТОРИНГА И ИНГИБИРОВАНИЯ ОБРАЗОВАНИЯ ОТЛОЖЕНИЙ В ВЫПАРНЫХ АППАРАТАХ И КОНЦЕНТРАТОРАХ ЦЕЛЛЮЛОЗНОГО ЗАВОДА (57) Реферат: Предложен способ мониторинга и ингибирования выпадения в осадок и осаждения отложений из отработанного ...

Method for preparing bio-mechanical raw color paste from wheat straws and fully utilizing byproducts

本发明属于造纸技术与废弃物综合利用技术领域，具体涉及一种麦草秸秆制备生物机械原色浆及副产物全利用的方法。本发明利用麦草秸秆作为制浆原料，采用热水处理麦草秸秆，然后加微量KOH，对麦草秸秆进行热饱和软化后调节麦草秸秆的温度，加入碱性复合酶进行生物处理，最后对麦草秸秆进行磨浆，制备得到的机械浆能够满足生产原色包装类纸和纸基材料的要求，同时对其副产物进行回收制备生物质复合肥，使得固废变废为宝，实现了麦草秸秆的高值化全利用。因此具有良好的实际应用价值和广阔的应用前景。

Method and system for high alpha dissolving pulp production

PROCEDURE FOR CONCENTRATING AN ALKALIC END

Method and apparatus for activating waste liquor

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Method of inhibiting scaling in black liquor evaporators

A method of inhibiting calcium carbonate scaling in a multi-stage evaporation plant of black liquor by heat-treating calcium-containing liquor includes a first stage wherein the calcium-containing liquor is heated to about 110-145° C. with direct contact with the heating medium; a second stage wherein the liquor is maintained at this temperature in a retention tank for 1-20 minutes to reduce the amount of calcium in the liquor by precipitating calcium carbonate; and a third stage wherein the heat-treated liquor is evaporated for combustion.

A recovery boiler plant and a method in a recovery boiler

一种回收锅炉设备包括回收锅炉，其中在熔炉的第一部分(1a)中废气在第一方向(F1)运行。熔炉还包括第二部分(1b)，其中废气在第二方向(F2)上运行，第二方向不同于第一方向(F1)。本发明涉及一种在回收锅炉中的方法。

EVAPORATING RESERVOIR WITH A REDUCED INLET INSERT AND METHOD FOR INTRODUCING FLOW IN AN EVAPORATING RESERVOIR

1. Выпарной резервуар, содержащий:внутреннюю камеру, имеющую внутреннюю поверхность, образованную боковой стенкой выпарного резервуара;канал для отработавшего пара, соединенный с верхним участком камеры;канал для выпуска жидкости, соединенный с нижним участком камеры;вставную впускную трубу, имеющую вставной выпускной канал и вставленную во впускное отверстие камеры, при этом вставная впускная труба пролегает внутрь боковой стенки, а вставной выпускной канал имеет удлиненную в поперечном сечении форму, ориентированную по существу параллельно центральной вертикальной оси выпарного резервуара и по существу перпендикулярную радиальной линии выпарного резервуара, так что вставной выпускной канал является по существу тангенциальным к боковой стенке.2. Выпарной резервуар по п. 1, в котором продольная ось вставной впускной трубы перпендикулярна линии, проходящей в радиальном направлении от вертикальной оси выпарного резервуара.3. Выпарной резервуар по п. 1, в котором вставная впускная труба включает в себя цилиндрическую секцию, имеющую круглое поперечное сечение, а также развальцованную секцию между круглой секцией и вставным выпускным каналом, при этом развальцованная секция постепенно смещается от продольной оси цилиндрической секции к боковой стенке выпарного резервуара, ближайшей к вставному выпускному каналу.4. Выпарной резервуар по п. 1, в котором площадь поперечного сечения вставной впускной трубы является по существу равномерной по всей длине трубы.5. Выпарной резервуар по п. 1, в котором площадь поперечного сечения исходной длины вставной впускной трубы является существенно большей, чем разваль� РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК D21C 3/00 (13) 2014 120 541 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2014120541/12, 21.05.2014 (71) Заявитель(и): АНДРИТЦ ИНК. (US) Приоритет(ы): (30) Конвенционный приоритет: 28.05.2013 US 61/827,830; 08.05.2014 US 14/272,941 R U (57) Формула изобретения 1. ...

Composition for inhibiting formation of deposits of calcium salts

Изобретение относится к способу ингибирования образования, осаждения и налипания отложений кальциевых солей на металлические и другие поверхности в оборудовании, резервуарах и/или трубопроводе установки для способа варки целлюлозы. Способ включает добавление эффективного количества ингибирующей отложения композиции к щелочной водной смеси в котле для способа варки целлюлозы. При этом композиция состоит из по меньшей мере одного фосфонатного компонента (I) и по меньшей мере одного компонента (II), состоящего из по меньшей мере одного карбоксилированного фруктанового соединения. Также изобретение относится к вариантам способа ингибирования образования отложений кальциевых солей в водной системе в выбранном щелочном способе варки целлюлозы, также способу производства бумажной массы и непосредственно композиции для ингибирования образования отложений кальциевых солей в водной системе в щелочном способе варки целлюлозы. Использование настоящего изобретения позволяет более эффективно ингибировать образование отложений кальциевых солей. 5 н. и 10 з.п. ф-лы, 2 пр., 3 ил. РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 508 426 (13) C2 (51) МПК D21C D21C C02F C02F C02F 3/22 11/10 5/10 5/12 5/14 (2006.01) (2006.01) (2006.01) (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2011138725/04, 16.03.2010 (24) Дата начала отсчета срока действия патента: 16.03.2010 (73) Патентообладатель(и): ДЕКВЕСТ АГ (CH) R U Приоритет(ы): (30) Конвенционный приоритет: 17.03.2009 US 61/160,876 07.04.2009 EP 09157548.0 (72) Автор(ы): ВЕРРЕТТ Шелдон Филлип (US) (43) Дата публикации заявки: 27.04.2013 Бюл. № 23 2 5 0 8 4 2 6 (45) Опубликовано: 27.02.2014 Бюл. № 6 2 5 0 8 4 2 6 R U (85) Дата начала рассмотрения заявки PCT на национальной фазе: 17.10.2011 C 2 C 2 (56) Список документов, цитированных в отчете о поиске: US 7172677 B2, 06.02.2007. WO 2009020546 A1, 12.12.2009. EP 1408103 A1, 14.04.2004. EP 1743906 A2, 17.01.2007. US 5777090 A, ...

A method and equipment for the evaporation of black liquor that is obtained from a digestion process during the production of cellulose pulp

本发明涉及一种用于蒸发在纤维素纸浆制造期间从煮解过程中获得的热黑液的方法及设备，其中黑液被导引至具有至少五个蒸发级的多级蒸发管线。根据本发明，将要在该蒸发管线中进行蒸发的黑液(11，10)在热交换器(HE1)中与已在至少一个级(I)中进行蒸发的、已部分蒸发的黑液(20，21)所进行的至少一个热交换过程中被冷却。将要进行蒸发的黑液被冷却以及已部分蒸发的黑液被加热至少5－10℃。通过本发明，减小了在分离甲醇时形成泡沫的风险。大部分的蒸发工作是在低温及黑液的最低干物质含量水平下进行的，从而还抑制了在此级中的结垢。

Method for manufacture of pulp and black lye recycling

FIELD: textile fabrics, paper. SUBSTANCE: methods are related to manufacture of pulp from grass raw material and recycling of black lye, especially the one produced in process of pulp boiling and may be used in pulp and paper industry. Methods of black lye recycling are intended for production of inorganic material and synthesis-gas. Methods for recycling of black lye include supply of heated fluidising gas into reactor process area provided with mass of loose material from oxide of alkali earth metal or containing oxide of this metal. Vortical flow of loose material is generated in this area of reactor so that loose material takes the shape of compact strip and circulates around axis of mentioned process area in the form of turbulent flow, creating fluidisated later. At that fluidising gas contains substoichiometric amount of oxygen for partial oxidation of black lye organic material and for transformation of other organic material of black lye into synthesis-gas. Then black lye is supplied into compact strip of loose material so that it is heated up to the temperature of 650-725°C and gasified. From this layer synthesis-gas is extracted in the form of spent gas, as well as inorganic material in the form of hard substance. Method may be used separately or as part of method for transformation of grass raw material into pulp for production of paper or cardboard. Method for production of pulp from grass raw material includes the following stages: (a) digestion of mentioned raw material with application of white lye that mainly contains sodium hydroxide and calcium hydroxide in amount sufficient for complete transformation of silica available in mentioned raw material into calcium silicate; (b) extraction of pulp and black lye free from free silica; (c) heating of black lye in reactor with fluidisated layer that contains calcium oxide for catalytic transformation of organic substance contained in mentioned black lye into gas and for production of regenerated hard ...

IMPROVEMENTS TO DIRECT EVAPORATORS TO AIR SUPPLIED WITH HEAT BY A BOILER

Process and device for treating black liquor during the treatment of raw paper pulp

Ce dispositif comprend: des évaporateurs (12,28) de lessive noire pour en effectuer la concentration; un réacteur préssurisé (10) pour la gazéification ou la combustion de la lessive noire concentrée dans les évaporateurs; des moyens (17) pour purifier le gaz formé dans le réacteur pressurisé; une installation de production d'énergie à turbine à gaz (16) pour la récupération de l'énergie à partir du gaz purifié; une chaudière (52) pour récupérer la chaleur des gaz d'échappement de la turbine sous la forme de vapeur pressurisée et; une installation de production d'énergie à turbine à vapeur (18) pour la récupération de l'énergie à partir de la vapeur produite dans la chaudière de récupération. Il comprend en outre un réacteur de chauffage sous pression (12) servant d'évaporateur pour la lessive noire, et qui est relié à une turbine à gaz (40) ou à une chambre de combustion (36) d'une turbine à gaz, par l'intermédiaire d'une conduite (30, 32), pour amener la vapeur secondaire pressurisée provenant du réacteur de chauffage sous pression, dans la turbine à gaz.

PROCESS AND DEVICE FOR THE EVAPORATION OF RESIDUAL LAUNDRY PRODUCED DURING THE COOKING OF FIBROUS MATERIALS CONTAINING CELLULOSE

METHOD AND APPARATUS FOR THE RECOVERY OF CHEMICALS FROM LAUNDRY PULP LAUNDRY

A.PROCEDE ET APPAREIL POUR AUGMENTER LA CAPACITE ET PERFECTIONNER LE PROCESSUS DE RECUPERATION DE PRODUITS CHIMIQUES, A PARTIR DE LESSIVE EPUISEE DE PATE A PAPIER, LORS DE L'UTILISATION D'UNE CHAUDIERE DE RECUPERATION DE SOUDE CLASSIQUE, POUR LA RECUPERATION DE COMPOSES CHIMIQUES A PARTIR DE LIQUEURS EPUISEES DE SULFATE. B.LA LIQUEUR EPUISEE EST FOURNIE EN TOTALITE OU EN PARTIE DANS UN EVAPORATEUR DE LIQUEUR 8 TANDIS QUE DE L'ENERGIE EXTERIEURE INDEPENDANTE DE LA COMBUSTION EST FOURNIE SIMULTANEMENT EN 16, 17. LA TEMPERATURE ET LE POTENTIEL D'OXYGENE SONT SOIGNEUSEMENT CONTROLES INDEPENDAMMENT L'UN DE L'AUTRE PAR LA FOURNITURE CONTROLEE DE L'ENERGIE. LE PRODUIT AINSI OBTENU EST INTRODUIT ENSUITE PARTIELLEMENT OU TOTALEMENT DANS UNE CHAUDIERE DE RECUPERATION DE SOUDE. A.PROCESS AND APPARATUS FOR INCREASING THE CAPACITY AND PERFECTING THE PROCESS FOR RECOVERING CHEMICALS, FROM DEPLETED LAUNDRY OF PAPER PULP, WHEN USING A CONVENTIONAL SODA RECOVERY BOILER, FOR RECOVERING CHEMICAL COMPOUNDS FROM EXHAUSTED LIQUEURS OF SULPHATE. B. ALL OR PART OF THE LIQUEUR EXHAUSTED IS PROVIDED IN A LIQUEUR EVAPORATOR 8 WHILE EXTERNAL ENERGY INDEPENDENT OF THE COMBUSTION IS SUPPLIED SIMULTANEOUSLY IN 16, 17. THE TEMPERATURE AND THE OXYGEN POTENTIAL ARE CAREFULLY CONTROLLED 'ONE OF THE OTHER BY THE CONTROLLED SUPPLY OF ENERGY. THE PRODUCT SO OBTAINED IS THEN INTRODUCED PARTLY OR COMPLETELY INTO A SODA RECOVERY BOILER.

Method and arrangement for treating black liquor

A method and arrangement for recovering black liquor chemicals and heat in a sulphate pulp process. The black liquor is concentrated in an evaporation plant, which comprises a pressure heating reactor (12), after which the black liquor is gasified or combusted in a reactor (10) for producing hot gases. The hot gases formed in the reactor (10) are introduced into a gas turbine power plant (16). The exhaust gases from the gas turbine (40) are introduced into a waste heat boiler (52), where steam is generated for a steam turbine power plant (18). Secondary steam is led from the pressure heating reactor as injection steam into the gas turbine.

Process for the purification and concentration of wastewater from paper mills

METHOD FOR REMOVING ANTHRAQUINONE TYPE

L'invention a pour objet un procédé d'élimination des tartres du type anthraquinone. On condense une vapeur provenant d'une liqueur noire qu'on obtient par séparation de la pulpe d'un mélange digéré de lignocelluloses renfermant un adjuvant de digestion du type anthraquinone ; et on met en contact une solution aqueuse chauffée d'une base, en présence ou en l'absence d'un agent réducteur ou d'un agent tensio-actif résistant aux alcalis, avec une paroi d'un condenseur de l'évaporateur sur laquelle adhère le tartre du type anthraquinone. Détartrage d'appareils et de conduites dans des installations de production de papier. The subject of the invention is a process for removing tartars of the anthraquinone type. A vapor is condensed from a black liquor which is obtained by separating the pulp from a digested mixture of lignocelluloses containing an anthraquinone-type digestion aid; and contacting a heated aqueous solution of a base, in the presence or absence of a reducing agent or an alkali resistant surfactant, with a wall of a condenser of the evaporator on which adheres the anthraquinone-type tartar. Descaling of devices and pipes in paper production plants.

Method of covering the chemical losses in pulp production

A B S T R A C T According to the invention the chemical losses in the pulping process are covered by the addition of residual solutions from other processes containing appropriate chemicals, to the final evaporator in the spent liquor evaporation process. This avoids salts being deposited on the heating surfaces, which occurs when the residual solutions are added to the weak liquor as in one of the methods used today. Capacity losses are avoided and the thermal eco-nomy is improved. In the other method currently used, residual solutions are added to the concentrated waste liquor before the spraying into the soda recovery boiler, the concentrated waste liquor being diluted. However, in the method according to the inven-tion there is no such dilution, resulting in better thermal economy.

Efficient methods and compositions for recovering products from organic acid pretreatment of plant material

提供了关于产物的有效下游加工的组合物和工艺，该产物来源于植物材料的有机酸预处理。

Method for separating hemicellulose from biomass pulping process water or waste liquid

本发明涉及一种从生物质制浆工艺水或废液中分离半纤维素的方法，该方法包括除去悬浮固体、使产物浓缩以及通过除去无机盐和小分子物质使产物纯化。其特征在于，在几个分离/纯化阶段通过例如pH调节而单独调整半纤维素分离工艺条件。本发明还涉及一种用于执行该方法的设备。利用这种方法和设备，可以回收大部分悬浮固体，尤其是木聚糖和其他半纤维素。

Patent FR2495193B1

Biomass pulping process How to isolate hemicellulose from water or effluent

Method for concentrating black liquor with oxidizing followed by CO2 addition

A method and apparatus are disclosed for concentrating an alkaline waste liquor containing sulfur compounds, the so-called black liquor, which is discharged from a step of Kraft-cooking wood fibers, in order to recover the cooking chemicals from said waste liquor, characterized in that CO 2 gas and/or a gas containing CO 2 gas is added to said waste liquor as a boiling-point-lowering agent, viscosity-lowering agent and solidification promoter, after a step of oxidizing said waste liquor and in or prior to one or more stages during the step of concentrating said waste liquor. Also disclosed is an apparatus for concentrating an alkaline waste liquor containing substantially no sulfur compounds (i.e., an AP black liquor), comprising (1) a primary concentrator for concentrating the AP black liquor discharged from said cooking means and washing means, (2) a secondary concentrator for further concentrating the AP black liquor concentrated in said primary concentrator and (3) exhaust gas absorbing means disposed between said primary and secondary concentrators.

Method and arrangement for separating contaminants from liquids or vapors

The present invention relates to a method and arrangement for separating contaminants from liquids, such as condensates, or vapors at an evaporation plant. Contaminants are separated from liquids by stripping when bringing a contaminant-enriched liquid into direct contact with a vapor by spraying or distributing the liquid into the vapor flowing in a vapor duct or onto wall surfaces in the vapor duct thus reducing the contaminant-content of the sprayed liquid and producing a cleaner liquid. The contaminants are enriched in the vapor. From vapors contaminants are separated by absorption when bringing a contaminant-enriched vapor into direct contact with a cleaner liquid by spraying or distributing the liquid into the vapor flowing in a vapor duct or onto wall surfaces in the vapor duct thus increasing the contaminant-content of the liquid, but producing a cleaned vapor.

Process vapor production method from black liquor

<B>"MéTODO DE PRODUçãO DE VAPOR DE PROCESSO A PARTIR DE LICOR NEGRO"<D> A presente invenção se refere a um método de produção de um vapor de processo (16) a partir de um primeiro licor negro (8), derivado em conexão com a produção de polpa de papel, em que o dito primeiro licor negro (8) é tratado para fornecer um segundo licor negro (10) de uma concentração superior à concentração do dito primeiro licor negro, assim como um líquido (13) de baixa concentração, onde após, é produzido o dito vapor de processo (16), a partir do dito líquido de baixa concentração (13).

Apparatus and method for cleaning smelt spouts and smelt discharge openings of a chemicals recovery furnace or boiler

An apparatus (7) comprising a cleaning rod (38) driven in reciprocating, axial extension (y) and retraction (x) movements upon cleaning a smelt discharge opening (5) of a chemicals recovery boiler, wherein a linear actuator (33) is controllable for driving the cleaning rod in the axial movements. A pivot actuation means (39; 41) is controllable for pivoting the cleaning rod about an axis (S) upon cleaning a smelt spout (4) associated with the smelt discharge opening (5), wherein one or more sensors (40; 47-52) are arranged to provide control basis for correlation of the axial movements (x; y) with the change in pivot angle (f) during pivoting of the cleaning rod. A method to be performed in use of the apparatus is likewise disclosed.

Apparatus and method for cleaning smelt spouts and smelt discharge openings of a chemicals recovery furnace or boiler

An apparatus (7) comprising a cleaning rod (38) driven in reciprocating, axial extension (y) and retraction (x) movements upon cleaning a smelt discharge opening (5) of a chemicals recovery boiler, wherein a linear actuator (33) is controllable for driving the cleaning rod in the axial movements. A pivot actuation means (39; 41) is controllable for pivoting the cleaning rod about an axis (S) upon cleaning a smelt spout (4) associated with the smelt discharge opening (5), wherein one or more sensors (40; 47-52) are arranged to provide control basis for correlation of the axial movements (x; y) with the change in pivot angle (f) during pivoting of the cleaning rod. A method to be performed in use of the apparatus is likewise disclosed.

The process extracts the ammonium salt and methanol from liquids obtained from impure condensates in a pulp mill

CHEMICAL RECOVERY BOILER, AND, METHODS FOR IMPROVING THE PERFORMANCE OF A CHEMICAL RECOVERY BOILER AND FOR OPERATING A CHEMICAL RECOVERY BOILER

CALDEIRA DE RECUPERAÇÃO QUÍMICA, E, MÉTODOS PARA APRIMORAR O DESEMPENHO DE UMA CALDEIRA DE RECUPERAÇÃO QUÍMICA E PARA OPERAR UMA CALDEIRA DE RECUPERAÇÃO QUÍMICA. Uma caldeira de recuperação química é descrita na qual o sistema de ar primário é reconfigurado para prover controle agressivo de carbonização e combustão aprimorada no forno inferior. O menor número de portas de ar primárias é usado em duas paredes opostas para gerar jatos de ar poderosos que penetram na caldeira provendo estabilidade física e térmica ao carbonizado, aumentando a liberação de calor e a estabilidade da combustão no forno inferior, aumentando a eficiência de redução e diminuindo transporte e emissões. Várias modalidades são descritas, incluindo estratégias operacionais e injeção de licor negro em vários níveis. CHEMICAL RECOVERY BOILER, AND, METHODS FOR IMPROVING THE PERFORMANCE OF A CHEMICAL RECOVERY BOILER AND FOR OPERATING A CHEMICAL RECOVERY BOILER. A chemical recovery boiler is described in which the primary air system is reconfigured to provide aggressive carbonization control and improved combustion in the lower furnace. The smallest number of primary air ports are used on two opposite walls to generate powerful air jets that penetrate the boiler providing physical and thermal stability to the carbonate, increasing heat release and combustion stability in the lower furnace, increasing the efficiency of reduction and decreasing transport and emissions. Several modalities are described, including operational strategies and black liquor injection at various levels.

Method and apparatus for treating black liquor

Multi-stage evaporation system

The precipitate lignin for being manufactured the method for precipitate lignin by black liquor and being manufactured by this method

本发明涉及由黑液制造沉淀木质素的方法和通过这种方法制造的沉淀木质素，其中所述方法包括以下步骤：提供黑液流，在提高的温度处理黑液，并从热处理的黑液沉淀木质素。本发明还涉及根据所述方法制造的沉淀木质素和制造的沉淀木质素的用途。

Boiler system controlling fuel to a furnace based on temperature of a structure in a superheater section

A boiler system is provided comprising: a furnace adapted to receive a fuel to be burned to generate hot working gases; a fuel supply structure associated with the furnace for supplying fuel to the furnace; a superheater section associated with the furnace and positioned to receive energy in the form of heat from the hot working gases; and a controller. The superheater section may comprise a platen including a tube structure with an end portion and a temperature sensor for measuring the temperature of the tube structure end portion and generating a signal indicative of the temperature of the tube structure end portion. The controller may be coupled to the temperature sensor for receiving and monitoring the signal from the sensor.

EVAPORATOR WITH RADIALLY ORGANIZED HEATING ELEMENT AND PROCEDURE BEFORE ITS USE

Use of reverse osmosis membranes to treat evaporator clean condensate

A method and apparatus for the treatment of the 5th Effect combined evaporator condensabe generated by kraft process pulp mills. The method includes the removal from effluents of organic compounds that result in BOD, COD and toxicity by the use of reverse osmosis. Through the use of a reverse osmosis membrane system (30, 56) there is provided a simple, economical and efficient treatment process for clean evaporator condensate, and in particular the 5th Effect combined evaporator condensate.

Method and apparatus for removing volatile fluids

A method and apparatus for the removal and recovery of volatile or evaporable substances from materials containing them. In other embodiments, the invention is readily applicable for the simultaneous incineration and concentration of such materials, particularly spent water-diluted effluents from industries and municipalities as well as for the generation of electric power from various thermal fuels, particularly power gas produced from coal or oil. In further embodiments, the reclamation of oil, from oil sands and shales, is effected as well as the cyclic pulping of cellulosic materials with cyclic recovery of heat and chemicals.

Improvements in the recovery of dissolved or suspended matter in industrial liquids

Process for heat utilization by steam condensation in concentrated solutions

PCT No. PCT/SE96/00542 Sec. 371 Date Nov. 12, 1997 Sec. 102(e) Date Nov. 12, 1997 PCT Filed Apr. 24, 1996 PCT Pub. No. WO96/34235 PCT Pub. Date Oct. 31, 1996A process of improving the heat efficiency by condensation of vapor in concentrated chemical solutions, according to which vapor and a concentrated chemical solution are introduced into an absorber comprising a cooler/condenser. In accordance with the invention, the condensate formed in the condensation process is utilized to dilute the concentrated chemical solution in the absorber, and the heat of condensation and the heat of solution generated from the dilution step are recovered by heat exchanged thereof with a heat-absorbing medium. A plant for performing the process is described, comprising an absorber (1) and a cooler (condenser) associated therewith, and at least one heat exchanger (3) having an inlet and an outlet for supply and withdrawal of a heat-absorbing medium. The plant has at least one inlet to the absorber (1) for supply of concentrated chemical solution, at least one inlet to the absorber (1) for supply of vapor, and at least one outlet from the absorber for withdrawal of a diluted chemical solution obtained through condensation of vapor and the chemical solution in the absorber (1).

Heat recovery from digester waste liquor

Method for pulp processing using cold caustic extraction with alkaline filtering reuse

Método para el procesamiento de pulpa usando extracción caústica en frío con reutilización del filtrado alcalino. Method for pulp processing using cold caustic extraction with reuse of alkaline filtrate.

Process for increasing the efficiency of slag control chemicals for black solution recovery units and other combustion units.

"PROCESSO PARA AUMENTAR A EFICIêNCIA DE SUBST‰NCIAS QUìMICAS DE CONTROLE DE ESCóRIA PARA UNIDADE DE RECUPERAçãO DE SOLUçãO NEGRA E OUTRAS UNIDADES DE COMBUSTãO". A redução da escorificação é aperfeiçoada por se direcionar substâncias químicas de redução de escória em uma fornalha com o auxílio de modelagem da dinâmica do fluído computacional. A utilização da substâncias química e a manutenção da caldeira são aperfeiçoadas.

Method for evaporation of spent liquor

(57) Abstract The invention relates to a method for evaporation of spent liquor by means of heat from a blow condenser where blow steam from a pulp cooker is condensed in a direct condense connected with a hot water accumulator. Spent liquor heated indirectly by hot water from the accumulator is brought to expand and released expansion vapor is used as a heat medium in a following evaporation stage. The apparatus comprises a heat exchanger, at least one flash tank and at least one evaporation unit, the heat exchanger being disposed to receive hot water from the upper part of the accumulator and to return it to its lower part and thus heat the spent liquor, and the flash tank being disposed to receive spent liquor heated in the heat exchanger and to release liquor vapor and spent liquor to the evaporation unit. Fig.1.

Method and apparatus for concentrating slurried solids

Method and apparatus for concentrating slurries by removing liquid in a single effect unit maintained under vacuum to effect low temperature flashing of the liquid. The single effect unit comprises a single flash column with separate recirculation loops, one to preheat incoming slurry for concentration and a separate loop for withdrawal of concentrated slurry. Vapor from the flash column can be treated to separate liquid from other components in the vapor.

Method and apparatus for deactivating spent liquors

Abstract Calcium containing sulphate spent liquor is deactivated by means of heating. Spent liquor is heated by means of direct condensing in a flash-steam-system. Liquor vapors generated during expansion of the already deactivated spent liquor are used for heating the spent liquor. Spent liquor is led to a retention tank through n + 1 in series connected direct condensers (DK I - DK V) and from the retention tank through n in series connected flash tanks (FT I - FT IV) disposed counter-currently to the direct condensers. In the last one of the direct condensers (DK V) the liquor is heated by means of externally supplied steam; in all others (DK I - DK IV) by means of expansion vapor.

Method and arrangement for cleaning contaminated condensate including a combined stripper/condenser

This invention relates to a method for cleaning unclean condensate, emanated when producing cellulose pulp including evaporation of spent liquor under utilization of a cleaning plant having several condensers, coupled in series, characterized in that process steam from the last evaporation stage and unclean condensate are introduced into a combined stripper/condenser, the process steam and the condensate being brought to flow in opposite directions so that direct heat exchange occurs, resulting in that volatile compounds of the condensate are separated and are taken up by the steam under simultaneous indirect cooling, resulting in condensation of the main part of the process steam, that the remaining process steam is gradually flowing furtheron, the process steam being successively cooled indirectly, resulting in that water and turpentine are first condensed and collected and that methanol is condensed, collected condensate being separated from turpentine, which is removed from the plant and is reintroduced to the stripper/condenser and that methanol is removed from the plant, that principally cleaned condensate is collected at the bottom of the combined stripper/condenser and is removed from the plant or is further purified. The invention also relates to a cleaning plant.

Method for scale formation in system exploited under rigid condition and novel agents against scale for these systems

Изобретение относится к способу ингибирования образования накипи в водных системах, которые обычно эксплуатируются в жестких условиях. Изобретение, в частности, касается улучшенного способа производства крафт-бумаги, где ингибируют накипь из карбоната кальция. Одна из специфических особенностей данного изобретения состоит в разработке новых полимерных средств против накипи, пригодных для предотвращения образования накипи из карбоната кальция в промышленных водных системах. Ингибирование накипи достигается добавлением средства против накипи, включающего звенья, по меньшей мере, одного мономера, выбранного из группы, в состав которой входят 1,2-дигидрокси-3-бутен, N-(гидроксиметил)акриламид и N-(сульфометил)акриламид, и звенья, по меньшей мере, одного мономера, выбранного из группы, в состав которой входят малеиновая кислота, акриловая кислота, акриламид, метакриловая кислота, итаконовая кислота, винилсульфокислота, стиролсульфокислота, N-третбутилакриламид, бутоксиметилакриламид, N,N-диметилакриламид, натрийакриламидометилпропансульфокислота и их соли. Технический эффект - снижение или предотвращение образования накипи в промышленных водных системах. 3 с.п. ф-лы, 2 табл. САбУГСс ПЧ сэ (19) РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ ВИ "” 2 214 973. (51) МПК? 13) С2 С 02 Е 5/10, О 21 Н 21/38 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 2001108566/12, 21.06.1999 (24) Дата начала действия патента: 21.06.1999 (30) Приоритет: 31.08.1998 Ш$ 09/144,145 (43) Дата публикации заявки: 10.04.2003 (46) Дата публикации: 27.10.2003 (56) Ссылки: Ц$ 4919821 А, 24.04.1990. ЦЗ 5441602 А, 15.08.1995. $Ц 730293 А, 25.04.1980. $Ц 548511 А, 28.02.1977. 4$ 408031Ъ А, 21.03.1918. (85) Дата перевода заявки РСТ на национальную фазу: 02.04.2001 (86) Заявка РСТ: 1$ 99/13976 (21.06.1999) (87) Публикация РСТ: М/О 00/12436 (09.03.2000) (98) Адрес для переписки: 129010, Москва, ул. Б.Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. Г ...

Methods for producing pulp and treating black liquor

A method is provided for treating black liquor particularly derived from nonwood pulp, by heating with an alkaline earth metal oxide in a toroidal fluidised bed reactor (304) at a temperature of above 650~C. The method may be used alone or as part of a method of converting graminaceous raw material to pulp for paper or board, said method comprising (a) digesting (12) said raw material with a white liquor based on sodium hydroxide and further comprising calcium hydroxide in an amount effective to substantially convert silica of said raw material to calcium silicate; (b) recovering (14) pulp and black liquor substantially free of uncombined silica; (c) heating the black liquor in a fluidized bed reactor (304) containing calcium oxide for catalysing conversion of organic content of said black liquor to gas and for providing recovered solids including sodium values of said white liquor and calcium oxide; and regenerating said white liquor using said recovered solids. The use of the above mentioned white liquor permits treatment of wheat straw, rice straw and other high-silica materials (9) without resulting in a black liquor that is difficult to treat.

Apparatus and method for cleaning smelt spouts and smelt discharge openings of a chemicals recovery furnace or boiler

An apparatus comprising a cleaning rod driven in reciprocating, axial extension (y) and retraction (x) movements upon cleaning a smelt discharge opening of a chemicals recovery boiler, wherein a linear actuator is controllable for driving the cleaning rod in the axial movements. A pivot actuation means is controllable for pivoting the cleaning rod about an axis (S) upon cleaning a smelt spout associated with the smelt discharge opening, wherein one or more sensors are arranged to provide control basis for correlation of the axial movements (x; y) with the change in pivot angle (φ) during pivoting of the cleaning rod. A method to be performed in use of the apparatus is likewise disclosed.

Minimal effluents discharge pulp mill with chemical recovery

Effluents are minimized from a cellulose pulp mill having a recovery boiler by concentrating liquid effluents from the bleach plant and/or liquid spills from process streams, incinerating the concentrated effluents in the recovery boiler, removing particles present in the flue gases from the recovery boiler to produce an ash including salts containing potassium and chloride, and sulfur compounds, and removing the potassium and chloride from the ash while returning the sulfur containing compounds to the recovery loop, so as to balance the sulfur, chloride and potassium levels in the mill. The sulfur is typically returned directly to a stream of black liquor just before entry into the recovery boiler. Green liquor is produced from the melt, which preferably is treated to remove metals from it prior to caustization (e.g. by sedimentation and/or filtration), and prior to green liquor crystallization to produce sodium hydroxide.

Process and plant for purification of impure condensate.

"PROCESO E PLANTA PARA PURIFICAçãO DE CONDENSADO IMPURO" A invenção refere-se a um processo de purificação de condensado contaminado, emanado da produção de polpa de celulose inclusive a evaporação de licor negro sob utilização de uma planta de purificação munida de vários condensadores, acoplados em série, caracterizado pelo fato de vapor de processo proveniente do último estágio de evaporação e do condensado contaminado ser introduzido em um extrator/condensador combinado, o vapor de processo e o condensado sendo levados a circular em direções opostas de forma que a troca de calor direta ocorra, resultando no fato dos compostos voláteis do condensado serem separados e serem captados pelo valor sob simultânea refrigeração indireta, resultando em uma condensação da parte principal do vapor de processo, de tal maneira que o vapor de processo remanescente está gradualmente fluindo adiante, o vapor de processo sendo sucessivamente resfriado indiretamente, resultando no fato de água e terebintina serem primeiramene condensados e recolhidos e de metanol ser condensado, o condensado recolhido sendo separado da terebintina, que é removida da planta e é reintroduzida no extrator/condensador e do metanol ser removido da planta, de forma que principalmente condensado purificado é recolhido no fundo do extrator/condensador combinado e é removido da planta ou é adicionalmente purificado. A invenção refere-se também a uma planta para purificação.

DEVICE AND METHOD FOR CLEANING SUMMERS FOR MELTING AND OUTLETS FOR MELTING A FURNACE OR BOILER FOR CHEMICALS REGENERATION

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2019 125 660 A (51) МПК D21C 11/12 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2019125660, 06.02.2018 (71) Заявитель(и): МАТС БЕРТИЛССОН ФЁРВАЛТНИНГ АБ (SE) Приоритет(ы): (30) Конвенционный приоритет: 08.02.2017 SE SE 1730035-1 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 09.09.2019 R U (43) Дата публикации заявки: 09.03.2021 Бюл. № 7 (72) Автор(ы): БЕРТИЛССОН, Матс (SE) (86) Заявка PCT: (87) Публикация заявки PCT: WO 2018/147788 (16.08.2018) R U (54) УСТРОЙСТВО И СПОСОБ ОЧИСТКИ ЛЕТОК ДЛЯ РАСПЛАВА И ВЫПУСКНЫХ ОТВЕРСТИЙ ДЛЯ РАСПЛАВА ПЕЧИ ИЛИ КОТЛА ДЛЯ РЕГЕНЕРАЦИИ ХИМИКАТОВ (57) Формула изобретения 1. Устройство (7), содержащее чистящий стержень (38), выполненный с возможностью приведения в возвратно-поступательное движение с осевыми перемещениями выдвижения (у) и отведения (х) при прочистке выпускного отверстия (5) для расплава в котле для регенерации химикатов, при этом предусмотрен линейный исполнительный механизм (33), выполненный с возможностью управления им для обеспечения осевых перемещений чистящего стержня, отличающееся тем, что предусмотрено поворотное исполнительное средство (39; 41), выполненное с возможностью управления им для обеспечения поворота чистящего стержня вокруг оси (S) при чистке летки (4) для расплава, связанной с выпускным отверстием (5) для расплава, причем предусмотрены один или более датчиков (40; 47-52), обеспечивающих основу управления для корреляции осевых перемещений (х; у) с изменением угла (ϕ) поворота во время поворота чистящего стержня. 2. Устройство по п. 1, содержащее один или более датчиков (40; 47-52), выполненных с возможностью отслеживания по меньшей мере одного из осевого и поворотного движений стержня, причем работа по меньшей мере одного из линейного исполнительного механизма (33) и поворотного исполнительного средства (39; 41) основана на выходном сигнале от датчика (датчиков). 3. Устройство по п. 2, в ...

A method of integrating bleaching and recovery in the production of pulp

A method of integrating bleaching and recovery in connection with the produc tion of chemical pulp that has been digested and preferably delignified with oxygen gas using processes that retain the visco sity and strength, to kappa number less than 16 without the use of chemicals containing chlorine, and using a bleaching sequence includi ng at least one step with sequestering agent and/or acid , and a peroxide step. According to the invention spent liquor (5) from the bleac hing department is pre-evaporated in one or more evapora tion units (20F, 20G), and the spent liquor (24) from the bleaching department th us pre-evaporated is combined with spent liquor (22) fro m the digestery and/or with pre-evaporated spent liquor (23) from the digestery ob tained by pre-evaporating spent liquor (22) from the dig estery in one or more evaporation units (20D, 20E) other than said evaporation unit s (20F, 20G) for pre-evaporating spent liquor (5) from t he bleaching department, after which the mixture of spent liquors (23, 24) is s ubjected to final evaporation in one or more evaporation units (20A, 20B, 20C) other than said evaporation units (20F, 20G, 20D, 20E) used for pre-evaporation.

Method of integrating bleaching and recovery in the production of pulp

A method of integrating bleaching and recovery in connection with the production of chemical pulp that has been digested and preferably delignified with oxygen gas using processes that retain the viscosity and strength, to kappa number less than 16 without the use of chemicals containing chlorine, and using a bleaching sequence including at least one step with sequestering agent and/or acid, and a peroxide step. According to the invention spent liquor (5) from the bleaching department is pre-evaporated in one or more evaporation units (20F, 20G), and the spent liquor (24) from the bleaching department thus pre-evaporated is combined with spent liquor (22) from the digestery and/or with pre-evaporated spent liquor (23) from the digestery obtained by pre-evaporating spent liquor (22) from the digestery in one or more evaporation units (20D, 20E) other than said evaporation units (20F, 20G) for pre-evaporating spent liquor (5) from the bleaching department, after which the mixture of spent liquors (23, 24) is subjected to final evaporation in one or more evaporation units (20A, 20B, 20C) other than said evaporation units (20F, 20G, 20D, 20E) used for pre-evaporation.

Isolation of lignin from solvent pulping liquors

A method of isolating lignin from a solvent pulping liquor containing lignin and a lower alcohol solvent, comprising the steps of: (1) continuously adding solvent pulping liquor to a stripping column, (2) heating the pulping liquor in the stripping column to produce an alcohol-rich overhead vapor stream and a residual slurry comprising lignin, (3) continuously withdrawing the overhead vapor stream from the stripping column, and (4) isolating the residual slurry.

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 (17) at a first temperature and pressure. The black liquor is treated in a flash tank (34) 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 (35) is taken for further treatment to the evaporation plant. The flash steam (38) is led to an indirect heat exchange contact with clean liquid in the reboiler (39) for boiling the liquid and for generating steam. The steam is led from the reboiler (39) into a fan or compressor (41) 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.

Liquid distributor for evaporator

The invention relates to a liquid distributor for an evaporator, particularly meant for a film evaporator treating liquid suspensions containing solids. The distributor comprises a channel array (3, 4) that distributes the liquid (8) fed in at the sides of the evaporator to the top of the heat transfer surface (5), over the whole width thereof. The channel array is formed of at least one transversal supply channel (3) and of a number of distribution channels (4) departing downwards from the supply channel and leading to the heat transfer surface (5). The invention is characterized in that each distribution channel (4) is provided, on its side located downstream with respect to the supply channel flow (8, 11), with a step-shaped expansion (14) bordered by a sharp point (15), the purpose of said expansion being to prevent liquid suction created in the channel due to the effect of siphonage. The junctions (9) of the supply channel (3) and the distribution channels (4) can be provided with rounded division surfaces (12), on which the liquid is distributed into the channels at each instant, and under which the step-shaped expansions (14) start.

Process for the manufacture of liquids, for example, black liquor from cellulose boiling, containing solids and dissolved substances

The present invention relates to a process and a device for evaporating liquids, for example black liquor from cellulose cooking, which contain solid and dissolved substances which are to be concentrated. The liquid is heated to close to boiling temperature in a heat exchanger ( 1 ) of the falling-film type. The process is characterized in that the pressure on the liquid side in the falling-film heat exchanger ( 1 ) is kept so high that boiling does not take place in this heat exchanger and in that the evaporation takes place, by means of flashing, in a separate expansion tank ( 7 ) that has a lower steam.

Continuous method for the precipitation of lignin from black liquor

Method of extracting hemicelluloses from process water from a process of converting biomass to fibrous mass or spent liquors

FIELD: production technology.SUBSTANCE: present invention relates to a method of extracting hemicelluloses from process water from a process of converting biomass to fibrous mass or waste liquors, involving removal of suspended solid particles, concentration of the product and purification of the product by removing inorganic salts and low-molecular substances. It is characterized by that process conditions of hemicellulose separation during several stages of separation/purification are regulated separately by means of, for example, pH adjustment. Using this method it is possible to allocate the most part of suspended solid substances, in particular of xylan and other hemicelluloses.EFFECT: disclosed is a method of separating hemicelluloses from process water from a process of converting biomass to fibrous mass or waste liquors.1 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 713 239 C1 (51) МПК D21C 11/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК D21C 11/00 (2019.08) (21)(22) Заявка: 2019106210, 27.07.2017 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): АНДРИЦ АГ (AT) Дата регистрации: 04.02.2020 02.09.2016 AT A50780/2016 (45) Опубликовано: 04.02.2020 Бюл. № 4 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 02.04.2019 (86) Заявка PCT: 2 7 1 3 2 3 9 R U (87) Публикация заявки PCT: WO 2018/041488 (08.03.2018) C 1 C 1 EP 2017/069032 (27.07.2017) 2 7 1 3 2 3 9 (56) Список документов, цитированных в отчете о поиске: US 2014163245 A1, 12.06.2014. WO 2004013409 A1, 12.02.2004. US 2012196233 A1, 02.08.2012. RU 2008123954 A, 27.01.2010. Приоритет(ы): (30) Конвенционный приоритет: R U 27.07.2017 (72) Автор(ы): ШАГАЕВ, Олег (AT), ВИЗЕГГЕР, Лукас (AT) Адрес для переписки: 197101, Санкт-Петербург, а/я 128, "АРСПАТЕНТ", М.В. Хмара (54) СПОСОБ ВЫДЕЛЕНИЯ ГЕМИЦЕЛЛЮЛОЗ ИЗ ТЕХНОЛОГИЧЕСКИХ ВОД ПРОЦЕССА ПРЕОБРАЗОВАНИЯ БИОМАССЫ В ВОЛОКНИСТУЮ МАССУ ИЛИ ОТРАБОТАННЫХ ЩЕЛОКОВ (57 ...

Patent RU2019125660A3

``” ВУ“? 2019125660” АЗ Дата публикации: 13.05.2021 Форма № 18 ИЗПМ-2011 Федеральная служба по интеллектуальной собственности Федеральное государственное бюджетное учреждение ж 5 «Федеральный институт промышленной собственности» (ФИПС) ОТЧЕТ О ПОИСКЕ 1. . ИДЕНТИФИКАЦИЯ ЗАЯВКИ Регистрационный номер Дата подачи 2019125660/03(050279) 06.02.2018 РСТ/$Е2018/050110 06.02.2018 Приоритет установлен по дате: [ ] подачи заявки [ ] поступления дополнительных материалов от к ранее поданной заявке № [ ] приоритета по первоначальной заявке № из которой данная заявка выделена [ ] подачи первоначальной заявки № из которой данная заявка выделена [ ] подачи ранее поданной заявки № [Х] подачи первой(ых) заявки(ок) в государстве-участнике Парижской конвенции (31) Номер первой(ых) заявки(ок) (32) Дата подачи первой(ых) заявки(ок) (33) Код страны 1. 5Е 1730035-1 08.02.2017 эЕ Название изобретения (полезной модели): [Х] - как заявлено; [ ] - уточненное (см. Примечания) УСТРОИСТВО И СПОСОБ ОЧИСТКИ ЛЕТОК ДЛЯ РАСПЛАВА И ВЫПУСКНЫХ ОТВЕРСТИИ ДЛЯ РАСПЛАВА ПЕЧИ ИЛИ КОТЛА ДЛЯ РЕГЕНЕРАЦИИ ХИМИКАТОВ Заявитель: МАТС БЕРТИЛССОН ФЁРВАЛТНИНГ АБ, $Е 2. ЕДИНСТВО ИЗОБРЕТЕНИЯ [Х] соблюдено [ ] не соблюдено. Пояснения: см. Примечания 3. ФОРМУЛА ИЗОБРЕТЕНИЯ: [Х] приняты во внимание все пункты (см. Примечания) [ ] приняты во внимание следующие пункты: [ ] принята во внимание измененная формула изобретения (см. Примечания) 4. КЛАССИФИКАЦИЯ ОБЪЕКТА ИЗОБРЕТЕНИЯ (ПОЛЕЗНОЙ МОДЕЛИ) (Указываются индексы МПК и индикатор текущей версии) р21С 11/12 (2006.01) 5. ОБЛАСТЬ ПОИСКА 5.1 Проверенный минимум документации РСТ (указывается индексами МПК) 21С 11/12 5.2 Другая проверенная документация в той мере, в какой она включена в поисковые подборки: 5.3 Электронные базы данных, использованные при поиске (название базы, и если, возможно, поисковые термины): Езрасепеё, Рабеагсв, Оцезе]-Отфи 6. ДОКУМЕНТЫ, ОТНОСЯЩИЕСЯ К ПРЕДМЕТУ ПОИСКА Кате- Наименование документа с указанием (где необходимо) частей, Относится к гория* ...

A method and a system for adjusting pH of green liquor dregs

The specification relates to a method and a system for adjusting pH of green liquor dregs. The method comprises contacting a slurry containing green liquor dregs (100, 200, 300, 400, 500) with flue gas (101, 201, 301, 401, 501). The system comprises a recovery boiler (105) configured to burn black liquor to produce smelt, a smelt dissolving tank (107) configured to dissolve the smelt to produce green liquor comprising green liquor dregs, and a green liquor clarifier/filter (103) and/or a dregs filter (104) configured to separate a slurry containing green liquor dregs (100, 200, 300, 400, 500) from the green liquor. The system further comprises a vessel (102, 202, 302, 402) configured to receive a slurry containing green liquor dregs (100, 200, 300, 400, 500) and a gas inlet (210, 310, 410, 510) configured to convey flue gas (101, 201, 301, 401, 501) to be contacted with the slurry containing green liquor dregs (100, 200, 300, 400, 500).

Method and system for pulp processing using cold caustic extraction with alkaline filtrate reuse

A method for pulp processing includes a cold caustic extraction stage in which the spent cold caustic solution and the spent liquid used to wash the extracted pulp are concentrated by an evaporation system. The concentrated liquid can be used as part of the neutralization and cooking liquor in the pulp process, leading to increased efficiency without significant reduction in pulp quality. Highly concentrated filtrate from the cold caustic extraction stage may help reduce hemicellulose deposition on wood fiber during the cooking step.

Process for isolation of hemicelluloses from biomass pulping process waters or spent liquors