СПОСОБ И УСТРОЙСТВО ДЛЯ ОХЛАЖДЕНИЯ ПОТОКА УГЛЕВОДОРОДОВ

FIELD: power industry. SUBSTANCE: natural gas flow cooling method is implemented in the following way: flow (10) of mixed cooling agent, which includes the first mixed cooling agent, is passed through one or more number of heat exchangers (12) so that cooled flow (20) of mixed cooling agent can be obtained. At least some part of cooling flow (30) including the second mixed cooling agent us expanded (14) so that one or more expanded cooling flows (40a) are obtained, and at least one of those can be passed through one or more heat exchangers (12) for cooling of flow (10) of mixed cooling agent so that flow (20) of mixed cooling agent, which is used for cooling (22) of hydrocarbon flow (70), is obtained. Temperature (T1) and flow rate (F1) of at least some part of cooled flow (20) of mixed cooling agent is continuously monitored, and flow rate (F2) of flow (30) is constantly monitored using the data on flow rate F1 and temperature T1. EFFECT: use of the invention will allow improving accuracy and control speed and increasing operating efficiency of compressor. 18 cl, 4 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 469 249 (13) C2 (51) МПК F25J 1/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ Приоритет(ы): (30) Конвенционный приоритет: 12.07.2007 EP 07112351.7 (73) Патентообладатель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) (43) Дата публикации заявки: 20.08.2011 Бюл. № 23 2 4 6 9 2 4 9 (45) Опубликовано: 10.12.2012 Бюл. № 34 (56) Список документов, цитированных в отчете о поиске: WO 2004/083753 А2, 30.09.2004. RU 2142605 C1, 10.12.1999. RU 2296280 C2, 10.04.2004. US 6272882 B1, 14.08.2001. SU 1458663 A, 15.02.1989. US 3808826 A, 07.05.1974. 2 4 6 9 2 4 9 R U (86) Заявка PCT: EP 2008/059046 (10.07.2008) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 12.02.2010 (87) Публикация заявки РСТ: WO 2009/007435 (15.01.2009) Адрес для переписки: 109012, Москва, ул. Ильинка, 5/2, ООО "Союзпатент", О.И. ...

СПОСОБ И УСТРОЙСТВО ДЛЯ СЖИЖЕНИЯ ПОТОКА УГЛЕВОДОРОДОВ

FIELD: power engineering. SUBSTANCE: raw flow is supplied and sent via at least two cooling stages. Each cooling stage comprises one or more heat exchangers. One of heat exchangers comprises the first circuit with the coolant, where the first coolant flow circulates, and the second of the heat exchangers includes the second circuit with the coolant, in which the second coolant flow circulates. The liquefied flow of hydrocarbons is expanded, and released steam is separated to therefore produce the liquefied flow of the hydrocarbon product and the gaseous flow. The gaseous flow, at least a part of the first coolant flow and at least a part of the second coolant flow are sent via the heat exchanger to ensure cooling of the first and second coolant flows with the specified gaseous flow. EFFECT: reduced power consumption and increased efficiency of liquefaction. 11 cl, 3 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 443 952 (13) C2 (51) МПК F25J 1/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ Приоритет(ы): (30) Конвенционный приоритет: 22.09.2006 EP 06121110.8 (73) Патентообладатель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) (43) Дата публикации заявки: 27.10.2010 Бюл. № 30 2 4 4 3 9 5 2 (45) Опубликовано: 27.02.2012 Бюл. № 6 (56) Список документов, цитированных в отчете о поиске: WO 2006/087331 А1, 24.08.2006. US 6272882 В1, 14.08.2001. RU 2226660 С2, 10.04.2004. RU 2121637 C1, 10.11.1998. US 6269655 В1, 07.08.2001. US 3729945 А, 01.05.1973. 2 4 4 3 9 5 2 R U (86) Заявка PCT: EP 2007/059960 (20.09.2007) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 22.04.2009 (87) Публикация заявки РСТ: WO 2008/034875 (27.03.2008) Адрес для переписки: 103735, Москва, ул. Ильинка, 5/2, ООО "Союзпатент", Н.Н.Высоцкой (54) СПОСОБ И УСТРОЙСТВО ДЛЯ СЖИЖЕНИЯ ПОТОКА УГЛЕВОДОРОДОВ (57) Реферат: Способ и устройство предназначены для сжижения потока углеводородов, представляющего собой поток природного газа, ...

Patent RU2018108055A3

`”ВУ“” 2018108055” АЗ Дата публикации: 27.10.2020 Форма № 18 ИЗ,ПМ-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 2018108055/12(012497) 06.03.2018 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. 15/822,713 27.11.2017 05 2. 15/830,330 04.12.2017 05 Название изобретения (полезной модели): [Х] - как заявлено; [ ] - уточненное (см. Примечания) Усовершенствованные способ и система охлаждения углеводородного потока. Заявитель: ЭР ПРОДАКТС ЭНД КЕМИКАЛЗ, ИНК., 05 2. ЕДИНСТВО ИЗОБРЕТЕНИЯ [Х] соблюдено [ ] не соблюдено. Пояснения: см. Примечания 3. ФОРМУЛА ИЗОБРЕТЕНИЯ: [Х] приняты во внимание все пункты (см. п см. Примечания [ ] приняты во внимание следующие пункты: р [ ] принята во внимание измененная формула изобретения (см. Примечания) 4. КЛАССИФИКАЦИЯ ОБЪЕКТА ИЗОБРЕТЕНИЯ (ПОЛЕЗНОЙ МОДЕЛИ) (Указываются индексы МПК и индикатор текущей версии) Е25.7 3/00 (2006.01) 5. ОБЛАСТЬ ПОИСКА 5.1 Проверенный минимум документации РСТ (указывается индексами МПК) Е257 3/00, 1/00, 1/02 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): Езрасепе, РАТЕМТЗСОРЕ, Рабеагсв, КОРТО, ИЗРТО 6. ДОКУМЕНТЫ, ОТНОСЯЩИЕСЯ К ПРЕДМЕТУ ПОИСКА Кате- Наименование документа с указанием (где необходимо) частей, Относится к гория* относящихся к предмету поиска ...

СПОСОБ ОПРЕДЕЛЕНИЯ СОСТАВА СМЕШАННОГО ХЛАДАГЕНТА ДЛЯ УСТАНОВКИ СЖИЖЕНИЯ ПРИРОДНОГО ГАЗА

FIELD: technological processes.SUBSTANCE: disclosed is a method of determining composition of mixed coolant. When creating the model, a simulation model is created based on operating parameters obtained from the natural gas liquefaction device, with determination of natural gas supply conditions for obtaining liquefied natural gas cooled to the specified temperature from the natural gas liquefaction device. When calculating the UA value obtained by multiplying the total heat transfer coefficient of the cryogenic heat exchanger by the heat transfer area, the UA value of the cryogenic heat exchanger is calculated by performing a simulation model. At preliminary calculation, total consumed power is calculated by performing simulation model for multiple cases of mixed refrigerant with different composition of coolant components in new conditions of natural gas supply. In determining the composition of the mixed coolant in the case of mixed refrigerant, in which the total consumed power per liquefied natural gas unit becomes the least, the mixed refrigerant composition is set in the new feed conditions.EFFECT: reduced power consumption.3 cl, 3 dwg, 2 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 686 355 C1 (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F25J 1/0022 (2019.02); F25J 1/0042 (2019.02); F25J 1/0052 (2019.02); F25J 1/0055 (2019.02); F25J 1/0057 (2019.02); F25J 1/0216 (2019.02); F25J 1/0241 (2019.02); F25J 1/0244 (2019.02); F25J 1/0249 (2019.02); F25J 1/0283 (2019.02) (21) (22) Заявка: 2018121938, 10.03.2016 10.03.2016 (73) Патентообладатель(и): ДжГК КОРПОРЕЙШН (JP) Дата регистрации: (56) Список документов, цитированных в отчете о поиске: JPS 6325481 A, 02.02.1988. JP Приоритет(ы): (22) Дата подачи заявки: 10.03.2016 2012531576 A, 10.12.2012. US 2004255615 A1, 23.12.2004. RU 2060431 C1, 20.05.1996. RU 2142605 C1, 10.12.1999. (45) Опубликовано: 25.04.2019 Бюл. № 12 (85) Дата начала ...

СПОСОБ И УСТРОЙСТВО ДЛЯ СЖИЖЕНИЯ ПОТОКА УГЛЕВОДОРОДОВ

... 1. Способ сжижения потока углеводородов, представляющего собой поток природного газа, содержащегося в сырьевом потоке, по меньшей мере, включающий следующие стадии: ! (a) обеспечение сырьевого потока; ! (b) прохождение сырьевого потока, по меньшей мере, через две ступени охлаждения с получением потока сжиженных углеводородов, при этом каждая ступень охлаждения содержит по меньшей мере один теплообменник, причем один из теплообменников включает первый контур хладагента с первым потоком хладагента, образованного из первого смешанного хладагента, а второй из указанных теплообменников включает второй контур хладагента со вторым потоком хладагента из второго смешанного хладагента; ! (c) разделение первого потока хладагента на первый поток легкого хладагента и первый поток тяжелого хладагента, и разделение второго потока хладагента на второй поток легкого хладагента и второй поток тяжелого хладагента; ! (d) расширение сжиженного потока углеводородов и разделение пара, выделившегося из сжиженного ...

СПОСОБ И УСТРОЙСТВО ДЛЯ ПОЛУЧЕНИЯ ОХЛАЖДЕННОГО ПОТОКА УГЛЕВОДОРОДОВ

... 1. Способ получения охлажденного сжиженного потока углеводородов, отличающийся тем, что включает, по меньшей мере, стадии: ! (a) обеспечения первого сжиженного потока углеводородов за счет прохождения первого сырьевого потока углеводородов через первую систему сжижения, имеющую одну или большее количество ступеней охлаждения, по меньшей мере, одна из которых имеет замкнутый контур циркуляции хладагента; ! (b) обеспечения второго сжиженного потока углеводородов посредством прохождения первого сырьевого потока углеводородов через вторую систему сжижения, имеющую одну или большее количество ступеней охлаждения, по меньшей мере, одна из которых имеет замкнутый контур циркуляции хладагента; ! (c) объединения первого сжиженного потока углеводородов со вторым сжиженным потоком углеводородов с получением сжиженных углеводородов; ! (d) дополнительного охлаждения объединенного сжиженного потока углеводородов в противотоке с хладагентом, такого, как поток сжиженного природного газа (СПГ). ! 2. Способ ...

СДВОЕННАЯ СИСТЕМА СО СМЕШАННЫМ ХЛАДАГЕНТОМ

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2017 110 050 A (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2017110050, 04.08.2015 (71) Заявитель(и): БЛЭК ЭНД ВИТЧ ХОЛДИНГ КОМПАНИ (US) Приоритет(ы): (30) Конвенционный приоритет: 29.08.2014 US 14/473,473 28 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 29.03.2017 US 2015/043541 (04.08.2015) (87) Публикация заявки PCT: A WO 2016/032701 (03.03.2016) Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр. 3, ООО "Юридическая фирма Городисский и Партнеры" R U (57) Формула изобретения 1. Способ сжижения углеводородсодержащего газа, способ включает: (a) введение полностью конденсированного первого смешанного хладагента, сжатого второго смешанного хладагента и подаваемого потока, содержащего углеводородсодержащий газ, в первую систему охлаждения; (b) расширение, по меньшей мере, части полностью конденсированного первого смешанного хладагента с образованием расширенного первого смешанного хладагента, причем полностью конденсированный первый смешанный хладагент не подвергается воздействию разделения фаз до стадии расширения или после нее; (c) охлаждение, по меньшей мере, части подаваемого потока и сжатого второго смешанного хладагента в первой системе охлаждения посредством косвенного теплообмена с расширенным первым смешанным хладагентом с образованием первого охлажденного подаваемого потока и полностью конденсированного второго смешанного хладагента; (d) расширение, по меньшей мере, части полностью конденсированного второго смешанного хладагента с образованием расширенного второго смешанного хладагента, при этом полностью конденсированный второй смешанный хладагент не подвергается воздействию разделения фаз до стадии расширения или после нее; (e) охлаждение, по меньшей мере, части первого охлажденного подаваемого потока Стр.: 1 A 2 0 1 7 1 1 0 0 5 0 (54) СДВОЕННАЯ СИСТЕМА СО СМЕШАННЫМ ХЛАДАГЕНТОМ 2 0 1 7 1 1 0 0 5 0 (86) Заявка ...

УСОВЕРШЕНСТВОВАННЫЕ СПОСОБ И СИСТЕМА ДЛЯ ОХЛАЖДЕНИЯ УГЛЕВОДОРОДНОГО ПОТОКА

METHOD AND APPARATUS FOR PRODUCING A LIQUEFIED HYDROCARBON STREAM AND ONE OR MORE FRACTIONATED STREAMS FROM AN INITIAL FEED STREAM

DUAL MIXED REFRIGERANT SYSTEM

DUAL MIXED REFRIGERANT SYSTEM

A refrigeration process and the production of liquefied natural gas.

DUAL MIXED REFRIGERANT SYSTEM

Method of cooling a hydrocarbon stream and an apparatus thereof.

Process and system of refrigeration of a fluid to be cooled at low temperature.

A refrigeration process and the production of liquefied natural gas.

DUAL MIXED REFRIGERANT SYSTEM

DUAL MIXED REFRIGERANT SYSTEM

DUAL MIXED REFRIGERANT SYSTEM

DUAL MIXED REFRIGERANT SYSTEM

DUAL MIXED REFRIGERANT SYSTEM

DUAL MIXED REFRIGERANT SYSTEM

Method of cooling a hydrocarbon stream and an apparatus thereof.

A refrigeration process and the production of liquefied natural gas.

PROCEDURE AND DEVICE FOR THE SIMULTANEOUS PRODUCTION OF A NATURAL GAS FOR THE LIQUEFACTION AND A LIQUID PARLIAMENTARY GROUP FROM NATURAL GAS

HYBRID CYCLE FOR THE PRODUCTION OF LIQUID NATURAL GAS

HYBRID CYCLE FOR THE LIQUEFACTION OF NATURAL GAS

LIQUEFACTION OF GAS PROCEDURE BY PARTIEL CONDENSATION OF MIXED REFRIGERANT AT STORED TEMPORARILY TEMPERATURES

Natural gas liquefaction by a high pressure expansion process

A method and system for liquefying a methane-rich high-pressure feed gas stream using a system having first and second heat exchanger zones and a compressed refrigerant stream. The compressed refrigerant stream is cooled and directed to the second heat exchanger zone to additionally cool it below ambient temperature. It is then expanded and passed through the first heat exchanger zone such that it has a temperature that is cooler, by at least 2,8 °C, than the highest fluid temperature within the first heat exchanger zone. The feed gas stream is passed through the first heat exchanger zone to cool at least part of it by indirect heat exchange with the refrigerant stream, thereby forming a liquefied gas stream. At least a portion of the first warm refrigerant stream is directed to the second heat exchanger zone to cool the refrigerant stream, which is compressed.

Method and apparatus for cooling a hydrocarbon stream

Method and apparatus for cooling a hydrocarbon stream

Method and apparatus for recovering and fractionating a mixed hydrocarbon feed stream

Method and apparatus for liquefying a hydrocarbon stream

A method and apparatus for liquefying a hydrocarbon stream such as natural gas from a feed stream. A feed stream is provided and passed through at least two cooling stages. Each cooling stage involves one or more heat exchangers. One of the heat exchangers involves a first refrigerant circuit having a first refrigerant stream, and a second of the heat exchangers involves a second refrigerant circuit having a second refrigerant stream. The liquefied hydrocarbon stream is expanded and a flash vapour is separated to provide a liquefied hydrocarbon product streamand a gaseous stream. The gaseous stream, at least a part of the first refrigerant stream, and at least a part of the second refrigerant stream are passed through a heat exchanger, for the gaseous stream to provide cooling to the first and second refrigerant streams.

Method and apparatus for liquefying a hydrocarbon stream

Method and apparatus for producing a cooled hydrocarbon stream

Method and apparatus for liquefying a hydrocarbon stream

Method and system for producing liquified natural gas

A method and system for optimizing the efficiency of an LNG liquification system of the gas expansion type, wherein an incoming feed gas is first separated in a fractionation column by counter current contact with a cold reflux fluid, and a gaseous stream introduced into the heat exchanger system at a reduced temperature such that an intermediate pinch point is created in the warm composite curve.

Mixed refrigerant liquefaction system and method

A system for liquefying a gas includes a liquefaction heat exchanger having a feed gas inlet adapted to receive a feed gas and a liquefied gas outlet through which the liquefied gas exits after the gas is liquefied in the liquefying passage of the heat exchanger by heat exchange with a primary refrigeration passage. A mixed refrigerant compressor system is configured to provide refrigerant to the primary refrigeration passage. An expander separator is in communication with the liquefied gas outlet of the liquefaction heat exchanger, and a cold gas line is in fluid communication with the expander separator. A cold recovery heat exchanger receives cold vapor from the cold gas line and liquid refrigerant from the mixed refrigerant compressor system so that the refrigerant is cooled using the cold vapor.

Dual mixed refrigerant system

Processes and systems are provided for recovering a liquefied natural gas (LNG) stream from a hydrocarbon-containing feed gas stream using dual closed-loop mixed refrigerant cycles. In particular, the processes and systems described herein can be used to efficiently and effectively liquefy methane from a hydrocarbon-containing feed gas stream with the use of a first refrigeration system and a second refrigeration system utilizing a first mixed refrigerant and a second mixed refrigerant. Furthermore, the first refrigeration system and second refrigeration system may be in fluid communication with a turboexpander and separator.

A REFRIGERATION PROCESS AND THE PRODUCTION OF LIQUEFIED NATURAL GAS

Process and apparatus for the production of liquefied natural gas utilising a refrigeration cycle, characterised by the steps of: i) Pre-treatment of a natural gas stream; ii) Chilling of either or both of the resulting pre- treated gas stream or a refrigerant gas stream within the refrigeration cycle; and iii) Liquefaction of the natural gas.

SCALABLE CAPACITY LIQUEFIED NATURAL GAS PLANT

PROCESS FOR THE ADJUSTMENT OF THE SUPERIOR HEATING POWER OF GAS IN THE LNG CHAIN

L'invention a pour objet un procédé de traitement d'un gaz naturel contenant de l'éthane, comprenant les étapes suivantes: (a) extraction d'au moins une partie de l'éthane du gaz naturel; (b) réformage d'au moins une partie de l'éthane extrait en un gaz de synthèse; (c) méthanation du gaz de synthèse en un gaz riche en méthane; et (d) mélange du gaz riche en méthane au gaz naturel. Installation pour la mise en oeuvre de ce procédé.

METHOD AND SYSTEM FOR PRODUCING LNG

A method is described for production of LNG from an incoming feed gas (1) on an onshore or offshore installation, and it is characterised by the following steps: 1) the feed gas is led throu gh a fractionation column (150) where it is cooled and separated in an overhead fraction with a reduced content of pentane (C5) and heavier components, and a bottom fraction enriched with heavier hydrocarbons, 2) the overhead fraction from the fractionation column is fed to a heat exchanger system (110) and is subjected to a partial condensation to form a two-phase fluid, and the two- phase fluid is separated in a suitable separator (160) into a liquid (5) rich in LPG and pentane (C3-C5) which is re-circulated as cold reflux to the fractionation column (150), while the gas (6) containing lower amounts of C5 hydrocarbons and hydrocarbons heavier tha n C5 is exported for further processing in the heat exchanger system (110) for liquefaction to LNG with a maximum content of ethane and LPG 3) the cooling ...

METHOD OF COOLING A HYDROCARBON STREAM AND AN APPARATUS THEREFOR

In a method of, and apparatus for, cooling a hydrocarbon stream, a hydrocarbon stream (45) to be cooled is heat exchanged in a first heat exchanger (50) against at least one refrigerant stream (145b, 185b) having a first refrigerant stream flow rate (FR1), to provide a cooled hydrocarbon stream (55) having a cooled hydrocarbon stream flow rate (FR2) and at least one return refrigerant stream (105). The first refrigerant stream flow rate (FR1) and the cooled hydrocarbon stream flow rate (FR2) are adjusted as follows, until an inputted first set point (SP1) for the first refrigerant stream flow rate (FR1) is achieved. If the first set point (SP1) is greater than the first refrigerant stream flow rate (FR1), then the cooled hydrocarbon stream flow rate (FR2) is increased before the first refrigerant stream flow rate (FR1) is increased; if the first set point (SP1) is less than the first refrigerant stream flow rate (FR1), then the first refrigerant stream flow rate (FR1) is decreased before ...

CONSOLIDATED REFRIGERATION AND LIQUEFACTION MODULE IN A HYDROCARBON PROCESSING PLANT

A method of processing natural gas to produce liquefied natural gas using a consolidated refrigeration and liquefaction module. The natural gas is cooled in a first array of one or more heat exchangers using a first refrigerant from a first refrigerant circuit, wherein the first refrigerant is compressed in a first compressor. A second refrigerant from a second refrigerant circuit is compressed in a second compressor. The second refrigerant is cooled and partially condensed using the first refrigerant in a second array of one or more heat exchangers located in the consolidated refrigeration and liquefaction module. The partially condensed second refrigerant is separated into liquid and vapor phases using a refrigerant separator located in the consolidated refrigeration and liquefaction module. The natural gas is liquefied to produce LNG in a third array of one or more heat exchangers using the vapor and liquid phases of the partially condensed second refrigerant.

METHOD AND SYSTEM FOR PRODUCING LIQUEFIED NATURAL GAS (LNG)

A method and system for optimizing the efficiency of an LNG liquification system of the gas expansion type, wherein an incom-ing feed gas is first separated in a fractionation column by counter cur-rent contact with a cold reflux fluid, and a gaseous stream introduced into the heat exchanger system at a reduced temperature such that an in-termediate pinch point is created in the warm composite curve.

METHOD OF GAS LIQUEFACTION AND DENITRATION NATURAL GAS, INSTALLATION FOR ITS REALIZATION AND GASES, OBTAINED AS A RESULT OF THIS SEPARATION

METHOD OF COOLING

СЖИЖЕНИЕ ПРИРОДНОГО ГАЗА

Раскрывается способ сжижения природного газа и также получения потока жидкости, содержащей преимущественно углеводороды тяжелее метана. В способе поток (31) природного газа для сжижения частично охлаждается (10) и разделяется на первый (34) и второй (36) потоки. Первый поток (34) далее охлаждается (13), по существу, для всей его конденсации, расширяется (14) до промежуточного давления и затем подается в перегонную колонну (19) в первую позицию ввода в среднюю часть колонны. Второй поток (36) также расширяется (15) до промежуточного давления и затем подается в колонну (19) во вторую более низкую позицию ввода в среднюю часть колонны. Отогнанный поток (42) выводится из колонны ниже точки ввода расширенного второго потока (36а) и охлаждается для конденсации по меньшей мере части его (42а) и формирования обратного потока (44а). По меньшей мере часть обратного потока (44а) направляется в перегонную колонну (19) как верхний питающий поток для нее (45). Нижний продукт из перегонной колонны (19 ...

СЖИЖЕНИЕ ПРИРОДНОГО ГАЗА

Раскрывается способ для сжижения природного газа и также получения потока жидкости, содержащей преимущественно углеводороды тяжелее метана. В способе поток природного газа для сжижения частично охлаждается и делится на первый и второй потоки. Первый поток далее охлаждается для конденсации по существу всего его, расширяется до промежуточного давления и затем подается в перегонную колонну в первую позицию ввода в среднюю часть колонны. Второй поток также расширяется до промежуточного давления и затем подается в колонну во вторую более низкую позицию ввода в среднюю часть колонны. Отогнанный поток выводится из колонны ниже точки ввода второго потока и охлаждается для конденсации по меньшей мере части его и формирования обратного потока. По меньшей мере часть обратного потока направляется в перегонную колонну как верхний питающий поток для нее. Нижний продукт из этой перегонной колонны предпочтительно содержит в основном любые углеводороды тяжелее метана, которые иначе уменьшили бы чистоту ...

СПОСОБ И УСТРОЙСТВО ДЛЯ ВЫДЕЛЕНИЯ И РАЗДЕЛЕНИЯ НА ФРАКЦИИ СЫРЬЕВОГО ПОТОКА СМЕШАННЫХ УГЛЕВОДОРОДОВ

Сырьевой поток (10) сконденсированных смешанных углеводородов, выделенный из исходного сырьевого потока (8), разделяют на один или более разделенных на фракции потоков. В ходе этого процесса сырьевой поток (10) сконденсированных смешанных углеводородов разделяют, по меньшей мере, на первую часть (20) сырьевого потока и вторую часть (30) сырьевого потока. Первая часть (20) сырьевого потока проходит в первый сепаратор (14) газ/жидкость с целью получения, по меньшей мере, первого разделенного на фракции потока в виде первого газообразного отбираемого сверху потока (40). Первый, отбираемый снизу, поток (50) жидкости, полученный в первом сепараторе (14) газ/жидкость, проходит во второй сепаратор (22) газ/жидкость с целью получения, по меньшей мере, второго разделенного на фракции потока в виде второго газообразного отбираемого сверху потока (70), который охлаждают в теплообменнике (26) с помощью второй части (30) сырьевого потока.

METHOD FOR LIQUEFYING NATURAL GAS (VERSIONS)

СПОСОБ СЖИЖЕНИЯ И ДЕАЗОТАЦИИ ПРИРОДНОГО ГАЗА И ГАЗЫ, ПОЛУЧЕННЫЕ В РЕЗУЛЬТАТЕ ЭТОГО РАЗДЕЛЕНИЯ

Изобретение относится к способу сжижения и деазотации природного газа (1), содержащего азот, согласно которому упомянутый газ охлаждают, сжижают и разделяют на первую головную фракцию (9), относительно более летучую и обогащенную азотом, и на первую донную фракцию (15). Способ отличается тем, что первую головную фракцию (9) охлаждают и сжижают, разделяют на вторую, относительно более летучую головную фракцию (11), которая производит газообразный азот (29), и на вторую донную фракцию (12), которая подвергается снова обработке, и тем, что первую донную фракцию (15) охлаждают для того, чтобы произвести сжиженный природный газ, по существу, очищенный от азота (24). Описаны также другие варианты выполнения.

NATURAL GAS LIQUEFACTION

METHOD FOR ADJUSTING THE CALORIFIC VALUE OF THE GAS IN THE UPPER CHAIN LNG.

Natural gas liquefaction process

The natural gas, under pressure, is cooled in the first stage to less than -30 deg C. and totally condensed and supercooled in the second stage. The secondary refrigerating mixture is cooled by heat exchange with the primary mixture and the supercooled natural gas is finally expanded to give the liquified product (LNG). The liquefaction process is carried out in the following stages. The natural gas is cooled in the first stage (I) to a temperature lower than -30 deg C. in a first refrigerating cycle using a refrigerant M1, which is compressed, partially condensed using an external cooling fluid, then supercooled, expanded and vaporized. The gas is then condensed and supercooled in a second stage (II) by using a second refrigerant mixture M2, which had been compressed, cooled by an external fluid, then cooled by heat exchange with the primary refrigerant mixture M1 in the first refrigeration stage. On leaving the first stage, it is in a partially condensed state and is conveyed, without phase separation, to the second stage where it is totally condensed , expanded and vaporized at two pressure levels. The supercooled natural gas is expanded to form the LNG product. An Independent claim is included for a processing plant to carry out the described process.

Scalable capacity liquefied natural gas plant

NATURAL GAS LIQUEFACTION

A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled and divided into first and second streams. The first stream is further cooled to condense substantially all of it, expanded to an intermediate pressure, and then supplied to a distillation column at a first mid-column feed position. The second stream is also expanded to intermediate pressure and is then supplied to the column at a second lower mid-column feed position. A distillation stream is withdrawn from the column below the feed point of the second stream and is cooled to condense at least a part of it, forming a reflux stream. At least a portion of the reflux stream is directed to the distillation column as its top feed. The bottom product from this distillation column preferentially contains the majority of any hydrocarbons heavier than methane that would ...

METHOD AND APPARATUS FOR LIQUEFYING A HYDROCARBON STREAM

A method of liquefying a hydrocarbon stream such as natural gas from a feed stream (10) comprising at least the steps of: (a) passing the feed stream (10) against a mixed refrigerant being cycled through a heat exchanger (12), to provide an at least partly liquefied hydrocarbon stream (20) having a temperature below -100 °C; (b) outflowing the mixed refrigerant as a liquid and vapour outflow refrigerant stream (80) from the heat exchanger (12); (c) passing the liquid and vapour outflow refrigerant stream (80) through a first separator (18) to provide a vapour refrigerant stream (90) and a liquid refrigerant stream (110); (d) recycling without substantial heat exchange the liquid refrigerant stream (110) of step (c) into the heat exchanger (12) of step (a); (e) compressing the vapour refrigerant stream (90) to provide a compressed refrigerant stream (95); (f) cooling the compressed refrigerant stream (95) to provide a cooled compressed stream (100) having a temperature below 0 °C; and (g ...

METHOD AND APPARATUS FOR LIQUEFYING A HYDROCARBON STREAM

A method and apparatus for liquefying a hydrocarbon stream (10) such as natural gas. The method comprises the steps of : (a) compressing the hydrocarbon stream (10) using one or more compressors (12) driven by one or more steam turbines (14) to provide a compressed hydrocarbon stream (20); (b) heat exchanging the compressed hydrocarbon stream (20) against one or more refrigerant streams (40) to fully condense the compressed hydrocarbon stream (20) and provide a liquefied hydrocarbon stream (30) and one or more warmed refrigerant streams (50); (c) compressing at least one of the warmed refrigerant stream(s) (50) of step (b) using one or more compressors (18) driven by one or more gas turbines (22); and (d) at least partly driving one or more of the steam turbines (14) of step (a) using steam provided by one or more of the gas turbines (22) of step (c).

METHOD AND APPARATUS FOR COOLING A HYDROCARBON STREAM

A mixed refrigerant stream (10) comprising a first mixed refrigerant is passed through one or more heat exchangers (12) to provide a cooled mixed refrigerant stream (20). At least a fraction of a cooling stream (30) comprising a second mixed refrigerant is expanded (14) to provide one or more expanded cooling streams (40a), at least one of which may be passed through one or more of the heat exchangers (12), to cool the mixed refrigerant stream (10) thereby providing the cooled mixed refrigerant stream (20) which is used to cool (22) a hydrocarbon stream (70). The temperature (T1) and the flow (F1) of at least part of the cooled mixed refrigerant stream (20) is monitored, and the flow (F2) of the cooling stream (30) is controlled using the flow F1 and the temperature T1.

Multiple circuit cryogenic liquefaction of industrial gas with multicomponent refrigerant

A method for more efficiently cooling and liquefying industrial gas wherein refrigeration for the cooling and liquefaction is generated using first and second defined multicomponent refrigerant fluids in separate refrigeration circuits to cover a wide temperature range from ambient to cryogenic temperature.

Hybrid cycle for production of liquefied natural gas

Refrigeration process for gas liquefaction which utilizes one or more vaporizing refrigerant cycles to provide refrigeration below about -40°C and a gas expander cycle to provide refrigeration below about -100°C. Each of these two types of refrigerant systems is utilized in an optimum temperature range which maximizes the efficiency of the particular system. A significant fraction of the total refrigeration power required to liquefy the feed gas (typically more than 5% and often more than 10% of the total) can be consumed by the vaporizing refrigerant cycles. The invention can be implemented in the design of a new liquefaction plant or can be utilized as a retrofit or expansion of an existing plant by adding gas expander refrigeration circuit to the existing plant refrigeration system.

HYBRID CYCLE FOR THE LIQUEFACTION OF NATURAL GAS

Method for the liquefaction of a hydrocarbon-rich stream

Method and device for liquefying a natural gas without phase separation of the coolant mixtures

Method and system for producing LNG

Method and system for producing liquified natural gas

A method and system for optimizing the efficiency of an LNG liquification system of the gas expansion type, wherein an incoming feed gas is first separated in a fractionation column by counter current contact with a cold reflux fluid, and a gaseous stream introduced into the heat exchanger system at a reduced temperature such that an intermediate pinch point is created in the warm composite curve.

Dual mixed refrigerant system

Processes and systems are provided for recovering a liquefied natural gas (LNG) stream from a hydrocarbon-containing feed gas stream using dual closed- loop mixed refrigerant cycles. In particular, the processes and systems described herein can be used to efficiently and effectively liquefy methane from a hydrocarbon-containing feed gas stream by utilizing a first refrigeration system and a second refrigeration system in fluid communication with a turboexpander and separator.

DUAL MIXED REFRIGERANT SYSTEM

Processes and systems are provided for recovering a liquefied natural gas (LNG) stream from a hydrocarbon-containing feed gas stream using dual closed-loop mixed refrigerant cycles. In particular, the processes and systems described herein can be used to efficiently and effectively liquefy methane from a hydrocarbon-containing feed gas stream with the use of a first refrigeration system and a second refrigeration system utilizing a first mixed refrigerant and a second mixed refrigerant. Furthermore, the first refrigeration system and second refrigeration system may be in fluid communication with a turboexpander and separator.

DUAL MIXED REFRIGERANT SYSTEM

Processes and systems are provided for recovering a liquefied natural gas (LNG) stream from a hydrocarbon-containing feed gas stream using dual closed- loop mixed refrigerant cycles. In particular, the processes and systems described herein can be used to efficiently and effectively liquefy methane from a hydrocarbon-containing feed gas stream by utilizing a first refrigeration system and a second refrigeration system in fluid communication with a turboexpander and separator.

METHOD FOR PRODUCING A STREAM OF SUBCOOLED LIQUEFIED NATURAL GAS USING A NATURAL GAS FEEDSTREAM, AND ASSOCIATED FACILITY

Ce procédé comprend le passage du courant de charge (12) dans un premier échangeur thermique (16) pour un échange thermique avec un courant (60) de réfrigérant gazeux produit dans un premier cycle (26) de réfrigération comprenant une première turbine (34) de détente dynamique. Il comprend le passage d'un courant de charge pré-refroidie (18) dans un deuxième échangeur thermique (20) pour un échange thermique avec un deuxième courant (62) de réfrigérant gazeux produit dans un deuxième cycle de réfrigération (28) comprenant une deuxième turbine (42) de détente dynamique. Il comporte le passage d'un courant de gaz naturel liquéfié (22) dans un troisième échangeur thermique pour un échange thermique avec un troisième courant (64) de réfrigérant produit dans un troisième cycle (30) de réfrigération comprenant une troisième turbine (52) de détente dynamique, distincte de la première turbine (34) et de la deuxième turbine (42).

СПОСОБ И УСТРОЙСТВО ДЛЯ ВЫДЕЛЕНИЯ И РАЗДЕЛЕНИЯ НА ФРАКЦИИ СЫРЬЕВОГО ПОТОКА СМЕШАННЫХ УГЛЕВОДОРОДОВ

Сырьевой поток (10) сконденсированных смешанных углеводородов, выделенный из исходного сырьевого потока (8), разделяют на один или более разделенных на фракции потоков. В ходе этого процесса сырьевой поток (10) сконденсированных смешанных углеводородов разделяют, по меньшей мере, на первую часть (20) сырьевого потока и вторую часть (30) сырьевого потока. Первая часть (20) сырьевого потока проходит в первый сепаратор (14) газ/жидкость с целью получения, по меньшей мере, первого разделенного на фракции потока в виде первого газообразного отбираемого сверху потока (40). Первый отбираемый снизу поток (50) жидкости, полученный в первом сепараторе (14) газ/жидкость, проходит во второй сепаратор (22) газ/жидкость с целью получения, по меньшей мере, второго разделенного на фракции потока в виде второго газообразного отбираемого сверху потока (70), который охлаждают в теплообменнике (26) с помощью второй части (30) сырьевого потока.

СЖИЖЕНИЕ ПРИРОДНОГО ГАЗА

Описан способ сжижения природного газа, объединенный с производством потока жидкости, содержащей преобладающим образом углеводороды тяжелее, чем метан. В способе поток природного газа, который подлежит сжижению, частично охлаждается, расширяется до промежуточного давления и подается в перегонную колонну. Остаточный продукт из этой перегонной колонны предпочтительно содержит основную часть любых углеводородов тяжелее, чем метан, которые в противном случае понизят чистоту сжиженного природного газа. Поток остаточного газа из перегонной колонны сжимается до более высокого промежуточного давления, охлаждается под давлением, чтобы сконденсировать его, и затем расширяется до низкого давления, чтобы образовать поток сжиженного природного газа.

СЖИЖЕНИЕ ПРИРОДНОГО ГАЗА

Описан способ сжижения природного газа, объединенный с производством потока жидкости, содержащей преобладающим образом углеводороды тяжелее, чем метан. В способе поток природного газа, который подлежит сжижению, частично охлаждается, расширяется до промежуточного давления и подается в перегонную колонну. Остаточный продукт из этой перегонной колонны предпочтительно содержит основную часть любых углеводородов тяжелее, чем метан, которые в противном случае понизят чистоту сжиженного природного газа. Поток остаточного газа из перегонной колонны сжимается до более высокого промежуточного давления, охлаждается под давлением, чтобы сконденсировать его, и затем расширяется до низкого давления, чтобы образовать поток сжиженного природного газа.

СЖИЖЕНИЕ ПРИРОДНОГО ГАЗА

Описан способ сжижения природного газа (50) совместно с производством потока жидкости, содержащего преобладающее количество углеводородов, более тяжелых, чем метан (41). В этом способе сжижаемый поток (31) природного газа частично охлаждают, расширяют до промежуточного давления (14, 15) и подают в перегонную колонну (19). Продукт (41) с нижней части перегонной колонны предпочтительно содержит основную часть любых углеводородов, более тяжелых, чем метан, в противном случае уменьшается чистота сжиженного природного газа (50). Поток (37) остаточного газа из перегонной колонны (19) сжимают (16) до более высокого промежуточного давления, охлаждают под давлением (60), чтобы сконденсировать его, и затем расширяют (61) до более низкого давления для того, чтобы образовать поток сжиженного природного газа.

METHOD OF COOLING AND PRODUCTION OF LIQUEFIED NATURAL GAS

METHOD TO AVOID INSTANTANEOUS EVAPORATION LIQUEFIED NATURAL GAS DURING TRANSPORTATION

METHOD TO AVOID INSTANTANEOUS EVAPORATION LIQUEFIED NATURAL GAS DURING TRANSPORTATION

Natural gas liquefaction

DEVICE AND METHOD FOR LIQUEFYING NATURAL GAS OR BIOGAS

Le procédé (300) de liquéfaction d'un gaz naturel ou d'un biogaz, comporte : - une première étape (305) de compression d'un mélange réfrigérant vaporisé, - une première étape (310) d'échange thermique de refroidissement du mélange réfrigérant comprimé, - une étape (315) de détente du mélange réfrigérant refroidi, - une deuxième étape (320) de compression de dioxyde de carbone vaporisé, - une deuxième étape (325) d'échange thermique de refroidissement du dioxyde de carbone comprimé, - une première étape (330) d'échange de chaleur entre : - le gaz et le mélange réfrigérant détendu (330a) pour refroidir le gaz, le mélange réfrigérant vaporisé étant fourni à la première étape de compression, - le mélange réfrigérant détendu et le dioxyde de carbone refroidi (330b) pour refroidir le dioxyde de carbone, le dioxyde de carbone refroidi étant fourni à une étape de détente du dioxyde de carbone, - le gaz et le dioxyde de carbone détendu (330c) pour refroidir le gaz, le dioxyde de carbone vaporisé étant fourni à la deuxième étape de compression et - l'étape (335) de détente du dioxyde de carbone refroidi dans la première étape d'échange de chaleur, le dioxyde de carbone détendu étant fourni à la première étape d'échange de chaleur. The method (300) for liquefying a natural gas or a biogas comprises: - a first step (305) of compressing a vaporized refrigerant mixture, - a first step (310) of heat exchange for cooling the compressed refrigerant mixture, - a step (315) of expansion of the cooled refrigerant mixture, - a second step (320) of compression of vaporized carbon dioxide, - a second step (325) of heat exchange for cooling the compressed carbon dioxide , - a first step (330) of heat exchange between: - the gas and the expanded refrigerant mixture (330a) to cool the gas, the vaporized refrigerant mixture being supplied to the first compression step, - the expanded refrigerant mixture and the cooled carbon dioxide (330b) to cool the ...

DEVICE AND METHOD FOR LIQUEFYING NATURAL GAS AND SHIP COMPRISING SUCH A DEVICE

PROCEDE ET SYSTEME DE REFRIGERATION D'UN FLUIDE A REFROIDIR A BASSE TEMPERATURE

L'INVENTION CONCERNE UN PROCEDE ET UN APPAREIL D'ECONOMIE D'ENERGIE DANS UNE METHODE DE LIQUEFACTION D'UN GAZ PAR EXEMPLE NATUREL 1 PAR UN CYCLE DE REFRIGERATION 2 AVEC LIQUEFACTION DU GAZ PAR REFROIDISSEMENT AU MOYEN DE LA VAPEUR PROVENANT DE LA VAPORISATION DU FLUIDE REFRIGERANT LIQUIDE SOUS-REFROIDI APRES DETENTE DE CELUI-CI A L'ETAT LIQUIDE, CETTE VAPEUR SERVANT SIMULTANEMENT A SOUS-REFROIDIR LE FLUIDE REFRIGERANT LIQUEFIE. L'INVENTION CONSISTE A EFFECTUER LA DETENTE DU FLUIDE REFRIGERANT LIQUIDE SOUS-REFROIDI A HAUTE PRESSION DANS UNE TURBINE HYDRAULIQUE CRYOGENIQUE 19 AVEC PRODUCTION D'UN TRAVAIL MECANIQUE EXTERIEUR EVENTUELLEMENT RECUPERE SUR L'ARBRE DE LA TURBINE POUR L'ENTRAINEMENT D'UNE MACHINE TOURNANTE 23. L'INVENTION EST APPLICABLE NOTAMMENT A LA LIQUEFACTION D'UN GAZ EN PARTICULIER NATUREL RICHE EN METHANE.

PROCESS OF SUPERCOOLING Of a CURRENT OF GNL BY COOLING AUMOYEN Of a FIRST CYCLE OF REFRIGERATION AND ASSOCIATED INSTALLATION.

Dans ce procédé, on sous-refroidit le courant de GNL (11) avec un fluide réfrigérant (41) dans un premier échangeur thermique (19). Ce fluide réfrigérant (41) subit un deuxième cycle de réfrigération (21) fermé, indépendant du premier cycle (15). Le cycle fermé (21) comprend une phase de réchauffage du fluide réfrigérant (42) dans un deuxième échangeur thermique (23), et une phase de compression du fluide réfrigérant (43) dans un appareil de compression (25), jusqu'à une pression supérieure à sa pression critique. Il comprend en outre une phase de refroidissement du fluide réfrigérant (45) provenant de l'appareil de compression (25) dans le deuxième échangeur thermique (23) et une phase de détente dynamique d'une partie (47) du fluide réfrigérant issu du deuxième échangeur thermique (23) dans une turbine (31). Le fluide réfrigérant (41) est formé par un mélange de fluides comprenant de l'azote.

DEVICE AND METHOD FOR LIQUEFYING NATURAL GAS OR BIOGAS

PROCESS OF LIQUEFACTION AND NATURAL GAS DEAZOTATION, INSTALLATION OF IMPLEMENTATION, AND GASES OBTAINED BY THIS SEPARATION

Procédé de liquéfaction et de déazotation de gaz naturel, installation de mise en oeuvre, et gaz obtenus par cette séparation. L'invention concerne un procédé de liquéfaction et de déazotation de gaz naturel (1) contenant de l'azote, dans lequel ledit gaz naturel (1) est refroidi, liquéfié et séparé en une première fraction de tête (9) relativement plus volatile enrichie en azote, et en une première fraction de pied (15).Le procédé est caractérisé en ce que la première fraction de tête (9) est refroidie et liquéfiée, séparée en une deuxième fraction de tête (11) relativement plus volatile qui fournit de l'azote gazeux (29), et en une deuxième fraction de pied (12) qui est retraitée, et en ce que la première fraction de pied (15) est refroidie pour fournir du gaz naturel liquéfié essentiellement exempt d'azote (24). D'autres modes de réalisation sont décrits. Process for liquefying and denitrogenation of natural gas, installation for using it, and gases obtained by this separation. The invention relates to a process for the liquefaction and denitrogenation of natural gas (1) containing nitrogen, in which said natural gas (1) is cooled, liquefied and separated into a relatively more volatile enriched first overhead (9). nitrogen, and a first bottom fraction (15). The process is characterized in that the first top fraction (9) is cooled and liquefied, separated into a second relatively more volatile top fraction (11) which provides nitrogen gas (29), and a second bottoms fraction (12) which is reprocessed, and in that the first bottoms fraction (15) is cooled to provide liquefied natural gas essentially free of nitrogen (24) . Other embodiments are described.

향상된 천연 가스 제조를 위한 초전도 시스템

... 천연 가스의 액화 또는 재기화를 위한 천연 가스 처리 시설이 제공된다. 시설은 적어도 액화 온도로 천연 가스를 가온하거나 냉각하기 위한 1차 처리 유닛, 예를 들어 냉동 유닛을 포함한다. 시설은 시설 내에 통합된 초전도성 전기 부품을 또한 갖는다. 초전도성 전기 부품은 통상의 전기 부품의 사용을 통해 경험될 수 있는 것에 비해 적어도 1 퍼센트만큼 시설의 전기 효율을 향상시키기 위해 초전도성 재료를 구비한다. 초전도성 전기 부품은 하나 이상의 모터, 하나 이상의 발전기, 하나 이상의 변압기, 개폐기, 하나 이상의 송전 전도체, 가변 속도 드라이브 또는 그 조합들일 수 있다.

NATURAL GAS LIQUEFACTION WITH FEED WATER REMOVAL

METHOD AND APPARATUS FOR COOLING A HYDROCARBON STREAM

A hydrocarbon stream is cooled by passing the hydrocarbon stream through at least one heat exchanger by a method, which comprises the steps of: (a) compressing a refrigerant in a compressor unit to yield compressed refrigerant; (b) expanding the compressed refrigerant, to yield cold refrigerant; (c) passing the hydrocarbon stream against the cold refrigerant in the heat exchanger designed for a maximum inlet flow of the refrigerant, to yield a cooled hydrocarbon stream and at least partly evaporated refrigerant; (d) recovering the cold hydrocarbon stream; and (e) recycling at least part of the at least partly evaporated refrigerant to the compressor unit, wherein the compressor unit comprises at least two compressors that all operate simultaneously in parallel and wherein the compressor unit has a design capacity in excess of the maximum inlet flow of refrigerant to the heat exchanger. The invention also provides an apparatus for this method.

SELF COOLING HEAT EXCHANGER

An inexpensive heat exchanger is disclosed, wherein the heat exchanger is made up of a plurality of plates and each plate has at least one channel defined in the plate. The plates are stacked and bonded together to form a block having conduits for carrying at least one fluid and where the exchanger includes an expansion device enclosed within the unit.

PRESSURE CONTROL OF GAS LIQUEFACTION SYSTEM AFTER SHUTDOWN

METHOD OF COOLING A HYDROCARBON STREAM AND AN APPARATUS THEREFOR

Hybrid cycle for production of liquefied natural gas

СПОСОБ СЖИЖЕНИЯ ПОТОКА, БОГАТОГО УГЛЕВОДОРОДОМ

FIELD: chemistry. SUBSTANCE: liquid coolant (19) is evaporated using heat from a hydrocarbon-rich stream to obtain evaporated coolant (3a-3d). The evaporated coolant (3a-3d) is successively compressed (5) and cooled (10) with ambient air, resulting in complete condensation of the compressed coolant. The completely condensed compressed coolant (12) is further supercooled through indirect heat exchange with an auxiliary coolant circulating in the auxiliary coolant loop. After that the supercooled coolant (16) is expanded (18) to form liquid coolant (19). The auxiliary coolant is selected such that its boiling point is higher than that of the liquid coolant at the same pressure. EFFECT: use of the invention reduces expenses and increases flow of the cooled stream. 7 cl, 7 dwg, 3 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 386 090 (13) C2 (51) МПК F25J 1/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2007137274/06, 07.03.2006 (24) Дата начала отсчета срока действия патента: 07.03.2006 (73) Патентообладатель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) (43) Дата публикации заявки: 20.04.2009 2 3 8 6 0 9 0 (45) Опубликовано: 10.04.2010 Бюл. № 10 (56) Список документов, цитированных в отчете о поиске: US 5611216 А, 18.03.1997. RU 2241181 C2, 27.11.2004. US 4094655 A, 13.06.1978. US 3596472 A, 03.08.1971. US 2500118 A, 03.07.1950. 2 3 8 6 0 9 0 R U (86) Заявка PCT: EP 2006/060500 (07.03.2006) C 2 C 2 (85) Дата перевода заявки PCT на национальную фазу: 09.10.2007 (87) Публикация PCT: WO 2006/094969 (14.09.2006) Адрес для переписки: 103735, Москва, ул.Ильинка, 5/2, ООО "Союзпатент", пат.пов. Ю.Б.Перегудовой, рег. № 1103 (54) СПОСОБ СЖИЖЕНИЯ ПОТОКА, БОГАТОГО УГЛЕВОДОРОДОМ (57) Реферат: Настоящее изобретение относится к способу сжижения потока, богатого углеводородом, предпочтительно потока, содержащего природный газ, посредством осуществления теплообмена с хладагентом (1a-1d). ...

СПОСОБ СЖИЖЕНИЯ БОГАТОГО УГЛЕВОДОРОДАМИ ПОТОКА

Способ сжижения богатого углеводородами потока, прежде всего потока природного газа, осуществляется за счет теплообмена со смесями хладагентов в каскаде из двух холодильных циклов, первый из которых предназначен для предварительного охлаждения (Е1), а второй - для сжижения и переохлаждения (Е2) сжижаемого богатого углеводородами потока (а) и в каждом из которых предусмотрен по меньшей мере один одно- или многоступенчатый компрессор (VI, V2) с приводом от по меньшей мере одной газовой турбины (G1, G2), снабженной стартером, который при нормальном режиме сжижения используют для поддержания работы газовой турбины. Согласно изобретению во втором холодильном цикле со смесью хладагентов используют компрессор (V2) с холодным всасыванием и со степенью сжатия, составляющей по меньшей мере 10, и первый холодильный цикл со смесью хладагентов по меньшей мере частично используют для промежуточного охлаждения (Е1) по меньшей мере части потока (36, 39) частично сжатой смеси хладагентов второго холодильного ...

СПОСОБ ОХЛАЖДЕНИЯ УГЛЕВОДОРОДНОГО ПОТОКА И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

FIELD: chemistry. SUBSTANCE: in method and device for cooling hydrocarbon flow cooled hydrocarbon flow (45) is subjected to heat exchange in first heat exchanger (50) with at least one flow of coolant (145b, 185b), characterised by rate (FR1) of first flow of coolant, which results in formation of cooled hydrocarbon flow (55), characterised by rate (FR2) of cooled hydrocarbon flow, and at least one return flow (105) of coolant. rate (FR1) of first coolant flow and rate (FR2) of flow of cooled hydrocarbon agent is regulated until first specified parameter (SP1) for rate (FR1) of first coolant flow is achieved. If first specified parameter (SP1) is larger than rate (FR1) of coolant flow, rate (FR2) of hydrocarbon flow is increased before increasing rate (FR1) of coolant flow, if first specified parameter (SP1) is lower than rate of coolant flow, rate (FR1) of coolant flow is reduced before reduction of rate (FR2) of hydrocarbon flow, and if rate (FR2) of hydrocarbon flow decreases, rate (FR1) of coolant flow is reduces. EFFECT: prevention of heat exchanger overcooling. 15 cl, 3 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 525 048 C2 (51) МПК F25J 1/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2011115190/06, 11.09.2009 (24) Дата начала отсчета срока действия патента: 11.09.2009 (72) Автор(ы): АЛЕРС Паул Тео (NL), ВАН ДЕЙК Фредерик Ян (NL) 19.09.2008 EP 08164727.3 (43) Дата публикации заявки: 27.10.2012 Бюл. № 30 R U (73) Патентообладатель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) Приоритет(ы): (30) Конвенционный приоритет: (45) Опубликовано: 10.08.2014 Бюл. № 22 2142605 C1, 10.12.1999 . RU 2188370 C2, 27.08.2002 . EA 7356 B1, 27.10.2006 . WO 99/ 31448 A1, 24.06.1999. JP 2006084063 A, 30.03. 2006 (86) Заявка PCT: EP 2009/061793 (11.09.2009) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 19.04.2011 (87) Публикация заявки PCT: 2 5 2 5 0 4 8 WO 2010/031737 (25.03.2010) ...

СПОСОБ И УСТАНОВКА ДЛЯ СЖИЖЕНИЯ ПОТОКА УГЛЕВОДОРОДОВ

FIELD: machine building.SUBSTANCE: plant for liquefaction of hydrocarbons comprises a system 12 to extract a gas condensate liquid (GCL), a circuit 42 with the main coolant and a circuit 100 with the first coolant, a device 52 to reduce pressure and a gas liquid separator 62 installed downstream. The circuit 42 with the main coolant comprises at least one or more compressors for the main coolant, and the circuit with the first coolant comprises one or more compressors for the first coolant. The initial flow 10 of hydrocarbons is sent via the system 12 to extract the GCL to produce a head flow 20, rich in methane, which is serially cooled and liquefied with the help of circuits with the first and second coolants. Pressure of the liquefied flow is reduced, and the mixed phase flow 60 produced as a result is sent via a final gas liquid separator 62 for production of the final gas flow 70 and the flow 80 of liquefied hydrocarbon product. Capacity of the load of one or more compressors for the main coolant and one or more compressors for the first coolant is increased to their maximum load by means of control of temperature of liquefied flow for variation of the quantity of the final gas flow and by means of control of the quantity of final gas flow, which is supplied to the head flow 20, rich in methane, with the help of a recirculation flow 90b.EFFECT: improved separation of hydrocarbons.20 cl, 4 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 499 209 (13) C2 (51) МПК F25J 1/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2010145329/06, 07.04.2009 (24) Дата начала отсчета срока действия патента: 07.04.2009 (73) Патентообладатель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) R U Приоритет(ы): (30) Конвенционный приоритет: 09.04.2008 US 12/100,287 (72) Автор(ы): ТЕО Чи Сенг (NL) (43) Дата публикации заявки: 20.05.2012 Бюл. № 14 2 4 9 9 2 0 9 (45) Опубликовано: 20.11.2013 Бюл. № 32 (56) Список ...

СДВОЕННАЯ СИСТЕМА СО СМЕШАННЫМ ХЛАДАГЕНТОМ

FIELD: gas industry. SUBSTANCE: invention relates to liquefaction of natural gas. Method of liquefying a gas involves feeding a completely condensed first mixed refrigerant, a compressed second mixed refrigerant and a feed stream into a first cooling system. Further, the first mixed refrigerant is expanded to cool the supplied flow and the compressed second mixed refrigerant in the first cooling system by means of heat exchange with the expanded first mixed refrigerant to form the first cooled flow and the completely condensed second mixed refrigerant. Second mixed refrigerant is expanded. First cooled flow is cooled in the second cooling system by means of heat exchange with the expanded second mixed coolant with formation of the second cooled flow. First or the second cooled flow is expanded in the turbine expander. Expanded flow is separated in separator. Vapour head fraction is compressed in compressor driven by turboexpander. If the first cooled flow is expanded, the compressed vapour fraction is cooled in the first cooling system. If the second cooled flow is expanded, the compressed vapour fraction is cooled in the second cooling system. EFFECT: technical result is reduction of energy consumption. 19 cl, 7 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 700 112 C2 (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F25J 1/0022 (2019.05); F25J 1/0035 (2019.05); F25J 1/0042 (2019.05); F25J 1/0052 (2019.05); F25J 1/0057 (2019.05); F25J 1/0214 (2019.05); F25J 1/0238 (2019.05); F25J 1/0288 (2019.05); F25J 1/0292 (2019.05) (21)(22) Заявка: 2017110050, 04.08.2015 04.08.2015 Дата регистрации: Приоритет(ы): (30) Конвенционный приоритет: 29.08.2014 US 14/473,473 (43) Дата публикации заявки: 01.10.2018 Бюл. № 28 (45) Опубликовано: 12.09.2019 Бюл. № 26 (56) Список документов, цитированных в отчете о поиске: US 2004003625 A1, 08.01.2004. RU 2141084 C1, 10.11.1999. US 2004255617 A1, 23.12.2004. US ...

СПОСОБ И УСТРОЙСТВО ДЛЯ ОХЛАЖДЕНИЯ И РАЗДЕЛЕНИЯ УГЛЕВОДОРОДНОГО ПОТОКА

FIELD: oil and gas industry. SUBSTANCE: method involves provision of hydrocarbon flow (10), cooling of hydrocarbon flow (10) to obtain liquefied hydrocarbon flow (20), supply at least of some part of liquefied hydrocarbon flow (20) to distillating column (12) through the first inlet opening (17), provision of bottom raw material flow (30), provision of cooling agent circuit (4) containing at least one cooling agent flow (40), heating of bottom raw material flow (30) with counterflow (40) of cooling agent to obtain heated bottom raw material flow (50) and flow (60) of cooled cooling agent; supply of heated bottom raw material flow (50) to distilling column (12) through the second inlet opening (18) located below the first inlet opening (17) and separation of partially liquefied hydrocarbon flow (20) in distilling column (12) to obtain the first upper gaseous flow (70) and the first bottom liquid flow (80). EFFECT: use of the invention will allow reducing power consumption for cooling process of a cooling agent. 17 cl, 5 dwg, 2 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 488 759 (13) C2 (51) МПК F25J F25J 3/02 1/02 (2006.01) (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2010138604/06, 18.02.2009 (24) Дата начала отсчета срока действия патента: 18.02.2009 (73) Патентообладатель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) R U Приоритет(ы): (30) Конвенционный приоритет: 20.02.2008 EP 08101798.0 (72) Автор(ы): ЯГЕР Марко Дик (NL) (43) Дата публикации заявки: 27.03.2012 Бюл. № 9 2 4 8 8 7 5 9 (45) Опубликовано: 27.07.2013 Бюл. № 21 (56) Список документов, цитированных в отчете о поиске: US 5960644 A, 05.10.1999. RU 2133931 C1, 27.07.1999. RU 2047061 С1, 27.10.1995. WO 2006/031362 А1, 23.03.2006. GB 975628 А, 18.11.1964. US 5114451 А, 19.05.1992. 2 4 8 8 7 5 9 R U (86) Заявка PCT: EP 2009/051882 (18.02.2009) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 20.09.2010 (87) Публикация ...

Refrigeration process

The present invention relates to a single cycle mixed refrigerant process for industrial cooling applications, for example, the liquefaction of natural gas. The present invention also relates to a refrigeration assembly configured to implement the processes defined herein and a mixed refrigerant composition usable in such processes.

Mixed Refrigerant Liquefaction System and Method

A system for liquefying a gas includes a liquefaction heat exchanger having a feed gas inlet adapted to receive a feed gas and a liquefied gas outlet through which the liquefied gas exits after the gas is liquefied in the liquefying passage of the heat exchanger by heat exchange with a primary refrigeration passage. A mixed refrigerant compressor system is configured to provide refrigerant to the primary refrigeration passage. An expander separator is in communication with the liquefied gas outlet of the liquefaction heat exchanger, and a cold gas line is in fluid communication with the expander separator. A cold recovery heat exchanger receives cold vapor from the cold gas line and liquid refrigerant from the mixed refrigerant compressor system so that the refrigerant is cooled using the cold vapor. 1. A system for removing freezing components from a feed gas comprising:a. a feed gas line having an inlet adapted to communicate with a source of feed gas and an outlet;b. an expander having an inlet in communication with the outlet of the feed gas line and an outlet, said expander operatively connected to a loading device;c. a heavy hydrocarbon removal heat exchanger having a feed gas cooling passage with an inlet adapted to communicate with the outlet of the expander, a return vapor passage and a reflux cooling passage; i) a feed gas inlet in communication with an outlet of the feed gas cooling passage of the heat exchanger;', 'ii) a return vapor outlet in communication with an inlet of the return vapor passage of the heat exchanger;', 'iii) a reflux vapor outlet in communication with an inlet of the reflux cooling passage of the heat exchanger;', 'iv) a reflux mixed phase inlet in communication with an outlet of the reflux cooling passage of the heat exchanger;, 'd. a scrub device havinge. a reflux liquid component passage having an inlet and an outlet in communication with the scrub device;f. said scrub device configured to vaporize a reflux liquid component stream ...

DEVICE AND METHOD FOR LIQUEFYING A NATURAL GAS AND SHIP COMPRISING SUCH A DEVICE

The device () for liquefying a natural gas comprises: —a first centrifugal compressor (), —a fractionating means (), —a second centrifugal compressor (), —a first heat exchange body (), —a second heat exchange body () and —a return conduit () leading to the first compressor, —upstream of an inlet () in the first exchange body, a third heat exchange body (), —a third centrifugal compressor (), the first and third centrifugal compressors being actuated by a single common turbine (), —a casing () common to the first compressor and the third compressor, —a cooling means () and —a transfer conduit () leading to the third exchange body. 2. A device according to claim 1 , wherein the turbine actuating the first and third compressors are coupled mechanically.3. A device according to claim 2 , wherein the turbines are combined.4. A device according to claim 1 , which comprises:a separator of a gas fraction and a liquid fraction of the compressed light phase, the fourth compressor compressing the separated gas fraction,a regulator for the liquid fraction of the light phase heated in the second exchange body,the turbine of the fourth compressor being actuated by the expansion energy.5. A device according to claim 1 , wherein the second chemical compound comprises a pure substance comprising nitrogen claim 1 , propane and/or ammonia.6. A device according to claim 1 , wherein the first cooling mixture comprises nitrogen and methane and at least one compound amongst:ethylene;ethane;propane; and/orbutane.7. A device according to claim 1 , which comprises:a regulator for the liquefied natural gas,a collector for the evaporation gas produced during the expansion of the gas in the regulator, anda conduit for injecting the evaporation gas at the inlet of the second exchange body.8. A device according to claim 1 , wherein the means for cooling the second compound comprises an outlet for the second compound claim 1 , the device comprising claim 1 , between said outlet and the third ...

NATURAL GAS LIQUEFACTION DEVICE AND NATURAL GAS LIQUEFACTION METHOD

One object of the present invention is to provide a natural gas liquefaction device which uses noncombustible gas as a refrigerant, and can reduce the power consumption a range of relatively low refrigerant pressure, and the present invention provides a natural gas liquefaction device including a compressor which is configured to compress a refrigerant containing noncombustible gas by a plurality of compression stages; a heat exchanger which is configured to cool and liquefy a natural gas to be a liquefied natural gas; a natural gas liquefaction line which is configured to introduce the natural gas into the heat exchanger and supply the liquefied natural gas to an outside; a first refrigerant line which is configured to introduce a refrigerant- passed through the compressor into the heat exchanger, and then further introduce the refrigerant- into a decompressor; a second refrigerant line which is configured to introduce the refrigerant- decompressed by the decompressor into the heat exchanger, and further introduce the refrigerant- into any one of a second compression stage and subsequent stages of the compressor; a third refrigerant line which is configured to be branched from the first refrigerant line and introduce at least a part of the refrigerant- into an expansion turbine; and a fourth refrigerant line which is configured to introduce the refrigerant- expanded by the expansion turbine into the heat exchanger, and further introduce the refrigerant- into a first compression stage of the plurality of compression stages provided in the compressor. 1. A natural gas liquefaction device which produces a liquefied natural gas by cooling and liquefying a natural gas ,wherein the natural gas liquefaction device includes:a compressor which is configured to compress a refrigerant containing noncombustible gas by a plurality of compression stages;a heat exchanger which is configured to cool and liquefy a natural gas to be a liquefied natural gas;a natural gas liquefaction ...

Natural Gas Liquefaction By A High Pressure Expansion Process

A method and system for liquefying a methane-rich high-pressure feed gas stream using a first heat exchanger zone and a second heat exchanger zone. The feed gas stream is mixed with a refrigerant stream to form a second gas stream, which is compressed, cooled, and directed to a second heat exchanger zone to be additionally cooled below ambient temperature. It is then expanded to a pressure less than 2,000 psia and no greater than the pressure to which the second gas stream was compressed, and then separated into a first expanded refrigerant stream and a chilled gas stream. The first expanded refrigerant stream is expanded and then passed through the first heat exchanger zone such that it has a temperature that is cooler, by at least 5° F., than the highest fluid temperature within the first heat exchanger zone. 1. A method for liquefying a feed gas stream rich in methane , where the method comprises:(a) providing the feed gas stream at a pressure less than 1,200 psia;(b) compressing the feed gas stream to a pressure of at least 1,500 psia to form a compressed gas stream;(c) cooling the compressed gas stream by indirect heat exchange with an ambient temperature air or water, to form a cooled, compressed gas stream;(d) expanding the cooled, compressed gas stream in at least one work producing expander to a pressure that is less than 2,000 psia and no greater than the pressure to which the gas stream was compressed, to thereby form a chilled gas stream;(e) providing a compressed refrigerant stream with a pressure greater than or equal to 1,500 psia;(f) cooling the compressed refrigerant stream by indirect heat exchange with an ambient temperature air or water, to produce a compressed, cooled refrigerant stream;(g) directing the compressed, cooled refrigerant stream to a second heat exchanger zone, to additionally cool the compressed, cooled refrigerant stream below ambient temperature, to produce a compressed, additionally cooled refrigerant stream;(h) expanding the ...

SYSTEM FOR UTILIZING CARBON DIOXIDE OF FLUE GAS CAPTURED BY COLD HEAT OF LIQUEFIED NATURAL GAS

A system captures carbon dioxide from a flue gas of a power generation facility by using cold heat of liquefied natural gas and utilizes the captured carbon dioxide for mining natural gas, using heat of the flue gas to regasify the LNG. Solidified dry ice is captured from gaseous carbon dioxide contained in the flue gas, and the captured dry ice is used as filler when mining natural gas. The system includes a mining facility, a vehicle to transport LNG liquefied by the mining facility; and a facility for regasifying the transported LNG and capturing dry ice from the carbon dioxide. In the regasification and capture facility, the flue gas exchanges heat with the LNG, thereby regasifying the LNG at an increased temperature and capturing the dry ice from the carbon dioxide. The captured dry ice is transported to the mining facility, which uses it for mining the natural gas. 1. A system for utilizing carbon dioxide of a flue gas captured by cold heat of liquefied natural gas (LNG) , the system comprising:a mining facility for mining natural gas;a transportation vehicle for transporting the LNG obtained by liquefying the natural gas mined by the mining facility;a regasification and capture facility for regasifying the LNG transported by the transportation vehicle and capturing dry ice from the carbon dioxide of the flue gas; anda power generation facility for generating electricity by using the natural gas obtained by regasifying the LNG at the regasification and capture facility,wherein, in the regasification and capture facility, the flue gas produced at the power generation facility exchanges heat with the LNG such that the LNG is regasified at an increased temperature and such that the dry ice is captured from the carbon dioxide contained in the flue gas,wherein the transportation vehicle transports the captured dry ice to the mining facility, andwherein the mining facility uses the transported dry ice for mining the natural gas.2. The system of claim 1 , further ...

Natural Gas Liquefaction by a High Pressure Expansion Process

A method and system for liquefying a methane-rich high-pressure feed gas stream using a system having first and second heat exchanger zones and a compressed refrigerant stream. The compressed refrigerant stream is cooled and directed to the second heat exchanger zone to additionally cool it below ambient temperature. It is then expanded and passed through the first heat exchanger zone such that it has a temperature that is cooler, by at least 5° F., than the highest fluid temperature within the first heat exchanger zone. The feed gas stream is passed through the first heat exchanger zone to cool at least part of it by indirect heat exchange with the refrigerant stream, thereby forming a liquefied gas stream. At least a portion of the first warm refrigerant stream is directed to the second heat exchanger zone to cool the refrigerant stream, which is compressed. 1. A method for liquefying a feed gas stream rich in methane using a system having first and second heat exchanger zones , where the method comprises:(a) providing the feed gas stream at a pressure less than 1,200 psia;(b) providing a compressed refrigerant stream with a pressure greater than or equal to 1,500 psia;(c) cooling the compressed refrigerant stream by indirect heat exchange with an ambient temperature air or water, to produce a compressed, cooled refrigerant stream;(d) directing the compressed, cooled refrigerant stream to the second heat exchanger zone to additionally cool the compressed, cooled refrigerant stream below ambient temperature to produce a compressed, additionally cooled refrigerant stream;(e) expanding the compressed, additionally cooled refrigerant stream in at least one work producing expander, thereby producing an expanded, cooled refrigerant stream;(f) passing the expanded, cooled refrigerant stream through the first heat exchanger zone to form a first warm refrigerant stream, wherein the first warm refrigerant stream has a temperature that is cooler, by at least 5° F., than the ...

Natural Gas Liquefaction by a High Pressure Expansion Process

A method and system for liquefying a methane-rich high-pressure feed gas stream using a first heat exchanger zone and a second heat exchanger zone. The feed gas stream is mixed with a refrigerant stream to form a second gas stream, which is compressed, cooled, and directed to a second heat exchanger zone to be additionally cooled below ambient temperature. It is then expanded to a pressure less than 2,000 psia and no greater than the pressure to which the second gas stream was compressed, and then separated into a first expanded refrigerant stream and a chilled gas stream. The first expanded refrigerant stream is expanded and then passed through the first heat exchanger zone such that it has a temperature that is cooler, by at least 5° F., than the highest fluid temperature within the first heat exchanger zone. 1. A method for liquefying a feed gas stream rich in methane using a first heat exchanger zone and a second heat exchanger zone , where the method comprises:(a) providing the feed gas stream at a pressure less than 1,200 psia;(b) providing a refrigerant stream at near the same pressure of the feed gas stream;(c) mixing the feed gas stream with the refrigerant stream to form a second gas stream;(d) compressing the second gas stream to a pressure of at least 1,500 psia to form a compressed second gas stream;(e) cooling the compressed second gas stream by indirect heat exchange with ambient temperature air or water, to form a compressed, cooled second gas stream;(f) directing the compressed, cooled second gas stream to a second heat exchanger zone, to additionally cool the compressed, cooled second gas stream below ambient temperature, thereby producing a compressed, additionally cooled second gas stream;(g) expanding the compressed, additionally cooled second gas stream in at least one work producing expander to a pressure that is less than 2,000 psia and no greater than the pressure to which the second gas stream was compressed, to thereby form an expanded, ...

Heat exchanger having a configuration of passages and improved heat-exchange structures, and cooling method using at least one such heat exchanger

A heat exchanger having multiple plates which are mutually parallel and parallel to a longitudinal direction, the exchanger having a length measured in the longitudinal direction, the plates being stacked with spacing so as to define a first series of passages for the flow, in a general flow direction parallel to the longitudinal direction, of at least a first refrigerant fluid and a second refrigerant fluid, at least one passage of the first series being defined between two adjacent plates.

METHOD FOR LIQUEFYING NATURAL GAS WITH IMPROVED CIRCULATION OF A MIXED REFRIGERANT STREAM

A method for liquefying a hydrocarbon stream using a heat exchanger having a plurality of plates parallel to each other and to a longitudinal direction that is substantially vertical, the exchanger having a length measured in the longitudinal direction, the plates being stacked with spacing so as to define between them at least one first series of passages for the flow of at least part of a two-phase cooling stream vaporizing by exchanging heat with at least the hydrocarbon stream. 115.-. (canceled)16. A method for liquefying a hydrocarbon stream using a heat exchanger comprising a plurality of plates parallel to each other and to a longitudinal direction that is substantially vertical , said exchanger having a length measured in the longitudinal direction , the plates being stacked with spacing so as to define between them at least one first series of passages for the flow of at least part of a two-phase cooling stream vaporizing by exchanging heat with at least the hydrocarbon stream , said method comprising:a) introducing the hydrocarbon stream into the heat exchanger;b) introducing a cooling stream into the heat exchanger via at least one first inlet up to a first outlet, said first inlets and outlets being arranged so that the cooling stream flows through the exchanger in a downward direction opposite to the longitudinal direction;c) discharging the cooling stream via the first outlet of the exchanger;d) expanding the cooling stream originating from step c) so as to produce a two-phase cooling stream;e) reintroducing at least part of the two-phase cooling stream into the heat exchanger via at least one second inlet up to a second outlet, said second inlets and outlets being arranged so that said at least part of the two-phase cooling stream flows through the passages of the first series in an upward direction oriented in the longitudinal direction;f) at least partially vaporizing said at least part of the two-phase cooling stream in the passages of the first ...

System and Method for Liquefied Natural Gas Production

A system and method for producing liquefied natural gas from a natural gas source is provided. The method may include feeding natural gas provided by the natural gas source to a liquefaction module. The method may also include flowing the natural gas through a product stream of the liquefaction module. The method may further include flowing a process fluid through a liquefaction stream of the liquefaction module to cool at least a portion of the natural gas flowing through the product stream to produce the liquefied natural gas. 1. A method for producing liquefied natural gas from a natural gas source , comprising:feeding natural gas provided by the natural gas source to a liquefaction module;flowing the natural gas through a product stream of the liquefaction module; andflowing a process fluid through a liquefaction stream of the liquefaction module to cool at least a portion of the natural gas flowing through the product stream to produce the liquefied natural gas.2. The method of claim 1 , wherein flowing the natural gas through the product stream of the liquefaction module comprises:cooling the natural gas in a cooling assembly;further cooling the cooled natural gas from the cooling assembly in a heat exchanger;expanding the further cooled natural gas from the heat exchanger in an expansion valve to produce a two-phase fluid including the liquefied natural gas and a vapor phase; andseparating the liquefied natural gas from the vapor phase in a liquid separator.3. The method of claim 2 , further comprising storing the liquefied natural gas in a storage tank fluidly coupled with the liquefaction module.4. The method of claim 2 , further comprising:feeding the vapor phase from the liquid separator of the liquefaction module to a flash recovery module fluidly coupled with the liquefaction module; andcooling natural gas from the natural gas source in the flash recovery module with the vapor phase.5. The method of claim 1 , wherein flowing the process fluid through ...

SYSTEM AND METHOD FOR PRODUCING LIQUEFIED NATURAL GAS

A system and a method for producing liquefied natural gas are provided. The system includes a refrigeration loop system for providing a cold stream of refrigerant, a supersonic chiller for receiving and chilling a first gaseous natural gas stream to produce a liquefied natural gas liquid and separating the liquefied natural gas liquid from the first gaseous natural gas stream to obtain a second gaseous natural gas stream, and a cold box for receiving the cold stream of refrigerant and the second gaseous natural gas stream and cooling the second gaseous natural gas stream to obtain a liquefied natural gas by heat exchanging between the second gaseous natural gas stream and the cold stream of refrigerant. 1. A system for producing liquefied natural gas , the system comprising:a refrigeration loop system for providing a cold stream of refrigerant;a supersonic chiller for receiving and chilling a first gaseous natural gas stream to produce a liquefied natural gas liquid, and separating the liquefied natural gas liquid from the first gaseous natural gas stream to obtain a second gaseous natural gas stream; anda cold box for receiving the cold stream of refrigerant and the second gaseous natural gas stream, and cooling the second gaseous natural gas stream to obtain a liquefied natural gas by heat exchanging between the second gaseous natural gas stream and the cold stream of refrigerant.2. The system of claim 1 , further comprising a pretreatment module for receiving a raw natural gas stream and separating an impurity from the raw natural gas stream to obtain the first gaseous natural gas stream claim 1 , and providing the first gaseous natural gas stream to the supersonic chiller.3. The system of claim 1 , further comprising a pre-cooling module for receiving and cooling a third gaseous natural gas stream to obtain the first gaseous natural gas stream claim 1 , and providing the first gaseous natural gas stream to the supersonic chiller.4. The system of claim 3 , ...

PROCESS AND PLANT FOR PRODUCING LIQUEFIED NATURAL GAS

A process for producing liquefied natural gas, in which natural gas feed having methane and higher hydrocarbons including benzene is cooled down to a first temperature level in a first cooling step using a first mixed coolant and then subjected to a countercurrent absorption using an absorption liquid to form a methane-enriched and benzene-depleted gas fraction, wherein a portion of the gas fraction is cooled down to a second temperature level in a second cooling step using a second mixed coolant and liquefied to give the liquefied natural gas. In the plant proposed, the first and second mixed coolants are low in propane or free of propane, and the absorption liquid is formed from a further portion of the gas fraction which is condensed above the countercurrent absorption and returned to the countercurrent absorption without pumping. The present invention likewise provides a corresponding plant. 114-. (canceled)15. A process for producing liquefied natural gas , in which natural gas feed containing methane and higher hydrocarbons , including benzene , is cooled down to a first temperature level in a first cooling step using a first mixed refrigerant , and then subjected to countercurrent absorption using an absorption liquid to form a benzene-depleted gas fraction , wherein a portion of the gas fraction is cooled down to a second temperature level in a second cooling step using a second mixed refrigerant and liquefied to give the liquefied natural gas , wherein the first and second mixed refrigerants are low in propane or free of propane , and the absorption liquid is formed from a further portion of the gas fraction which is condensed above the countercurrent absorption and returned to the countercurrent absorption without pumping.16. The process according to claim 15 , wherein a countercurrent absorber is used in the countercurrent absorption claim 15 , which is operated with a head condenser arranged above an absorption region of the countercurrent absorber claim ...

System and Method for Removing Freezing Components from a Feed Gas

A system for removing freezing components from a feed gas includes a heavy hydrocarbon removal heat exchanger and a scrub device. The scrub device includes a scrub column that receives a cooled feed gas stream from the heat exchanger and a reflux separation device. Vapor from the scrub column is directed to the heat exchanger and cooled to create a reflux stream that includes a liquid component. This reflux stream is directed to the reflux separation device and a resulting liquid component stream is used to reflux the column. Vapor from the reflux separation device is expanded and directed to the heat exchanger, where it provides refrigeration, and a processed feed gas line. 1. A system for removing freezing components from a feed gas comprising: i) a feed gas cooling passage with an inlet adapted to communicate with a source of the feed gas;', 'ii) a return vapor passage configured to warm a stream of return fluid;', 'iii) a reflux cooling passage;, 'a. a heavy hydrocarbon removal heat exchanger having i) a feed gas inlet in communication with an outlet of the feed gas cooling passage of the heat exchanger;', 'ii) a return vapor outlet configured to direct a return vapor stream into an inlet of the return vapor passage of the heat exchanger;', 'iii) a scrub column including a reflux vapor outlet in communication with an inlet of the reflux cooling passage of the heat exchanger;', 'iv) a reflux mixed phase inlet in communication with an outlet of the reflux cooling passage of the heat exchanger;, 'b. a scrub device havingc. a reflux liquid component passage having an inlet and an outlet in communication with the scrub device;d. said scrub device configured so that a reflux vapor stream exits the scrub column through the reflux vapor outlet and is cooled in the reflux cooling passage prior to any portion of the reflux vapor stream flowing through the return vapor passage of the heat exchanger to form a mixed phase stream that is directed through the mixed phase inlet ...

METHOD AND SYSTEM FOR COOLING A HYDROCARBON STREAM

A system and method for increasing the efficiency of natural gas liquefaction processes by using a hybrid cooling system and method. More specifically, a system and method for converting a transcritical precooling refrigeration process to a subcritical process. In one embodiment, the refrigerant is cooled to sub-critical temperature using an economizer. In another embodiment, the refrigerant is cooled to a sub-critical temperature using an auxiliary heat exchanger. Optionally, the economizer or auxiliary heat exchanger can be bypassed when ambient temperatures are sufficiently low to cool the refrigerant to a sub-critical temperature. In another embodiment, the refrigerant is isentropically expanded. 1. A method for cooling a hydrocarbon feed stream against a first refrigerant to produce a cooled hydrocarbon stream , the first refrigerant having a critical temperature , the method comprising:(a) compressing the first refrigerant in at least one compression stage to produce a compressed first refrigerant;(b) cooling the compressed first refrigerant against an ambient fluid in at least one heat exchanger to produce a cooled first refrigerant having a first temperature that is greater than or equal to the critical temperature of the first refrigerant;(c) further cooling the cooled first refrigerant in at least one economizer heat exchanger against at least a first portion of the cooled first refrigerant to produce a further cooled first refrigerant at a second temperature and a warmed first refrigerant, the second temperature being less than the critical temperature of the first refrigerant; and (i) reducing the pressure of the first refrigerant;', '(ii) cooling the fluid stream against the reduced pressure first refrigerant in an evaporator, resulting in vaporization of at least a portion of the reduced pressure first refrigerant; and', '(iii) flowing at least a portion of the vaporized reduced pressure first refrigerant into one of the at least one compression stages ...

METHOD AND APPARATUS TO AVOID LNG FLASH WHEN EXPANDING TO THE LNG STORAGE FACILITY

Process for eliminating the evaporation of a liquefied natural gas stream during the transfer thereof into a storage facility, comprising the following steps: 1. A process for eliminating the evaporation of a liquefied natural gas stream during the transfer thereof into a storage facility , the process comprising the steps of:Step a): liquefying, by use of a refrigeration cycle, of a natural gas stream and of a nitrogen stream in a main heat exchanger;{'b': '14', 'Step b): cooling the liquefied natural gas stream from step a) in a second heat exchanger by circulation of said liquefied natural gas stream countercurrent to a liquid nitrogen flow () that is vaporized while cooling said liquefied natural gas stream; and'} wherein the liquid nitrogen flow used in step b) is from step a), and', 'wherein the liquid nitrogen stream from step a) is subcooled in the second heat exchanger before step c)., 'Step c): expanding the liquid nitrogen stream from step a) after leaving the main exchanger at its coldest level then introduction of said thus expanded stream into the second heat exchanger during step b),'}2. The process according to claim 1 , wherein the nitrogen stream from step b) supplies the refrigeration cycle used in step a) claim 1 , after having cooled the liquefied natural gas stream claim 1 , by being introduced at the coldest level of said main heat exchanger claim 1 , then by circulating countercurrent to the streams to be liquefied during step a) up to the hottest level of said main heat exchanger where said nitrogen stream is vaporized.3. The process according to claim 1 , wherein at least one portion of said of vaporized nitrogen stream forms the nitrogen stream to be liquefied in the main exchanger used in step a).4. The process according to claim 1 , wherein the refrigeration cycle is a Turbo-Brayton nitrogen cycle.5. The process according to claim 1 , wherein the natural gas introduced in step a) comprises at least 50% by volume of methane.6. The process ...

System and Method for Removing Freezing Components from a Feed Gas

A system for removing freezing components from a feed gas includes a heat exchanger, a scrub column and a return vapor expansion device. The heat exchanger includes a reflux cooling passage and a return vapor passage. Vapor from the scrub column is directed through the return vapor expansion device, where the temperature and pressure are lowered. The resulting cooled fluid then travels to the return vapor passage of the heat exchanger and is used to cool a vapor stream in the reflux cooling passage to create a reflux fluid stream that is directed to the scrub column. 1. A system for removing freezing components from a feed gas comprising:a. a scrub column having a feed gas inlet, a reflux liquid inlet and a vapor outlet, said feed gas inlet configured to receive at least a portion of the feed gas;b. a heat exchanger including a reflux cooling passage and a return vapor passage, said return vapor passage and said reflux cooling passage of the heat exchanger configured so that fluid flowing through the reflux cooling passage of the heat exchanger is cooled by return fluid flowing through the return vapor passage of the heat exchanger;c. said reflux cooling passage of the heat exchanger configured to receive and cool a reflux vapor stream that is at least a portion of the feed gas, prior to any portion of the reflux vapor stream flowing through the return vapor passage of the heat exchanger, so that a reflux fluid stream is formed and to direct at least a portion of the reflux fluid stream to the reflux liquid inlet of the scrub column;d. a return vapor expansion device having an inlet in fluid communication with the vapor outlet of the scrub column, said return vapor expansion device also having an outlet in communication with an inlet of the return vapor passage of the heat exchanger, said return vapor expansion device configured so that a pressure and a temperature of at least a portion of the return vapor stream from the vapor outlet of the scrub column are lowered ...

DEVICE AND METHOD FOR LIQUEFYING A NATURAL GAS AND SHIP COMPRISING SUCH A DEVICE

The device () for liquefying a natural gas comprises: 2100130116115100. Device () according to claim 1 , wherein the third exchange body () is positioned upstream from the inlet () for the natural gas in the first exchange body () claim 1 , the device () comprising:{'b': '150', 'a means () for cooling the second compressed compound; and'}{'b': 155', '130, 'a conduit () for transferring the second cooled compound to the third exchange body ().'}3100. Device () according to claim 2 , wherein the second compound is a pure substance composed of nitrogen claim 2 , propane and/or ammonia or a mixture of nitrogen and propane.4100. Device () according to one of to claim 2 , wherein the first cooling mixture comprises nitrogen and methane and at least one compound amongst:ethylene;ethane;propane; and/orbutane.5100130116115100121120. Device () according to one of to claim 2 , wherein the third exchange body () is positioned upstream from the inlet () for the natural gas in the first exchange body () claim 2 , the device () comprising claim 2 , downstream from the outlet () for liquefied natural gas from the second exchange body ():{'b': '135', 'a fourth body () for exchanging heat between the liquefied natural gas and the nitrogen;'}{'b': '145', 'a means () for compressing the vaporized nitrogen;'}{'b': '160', 'a means () for cooling the compressed nitrogen; and'}{'b': '165', 'a conduit () for transporting the cooled nitrogen to the fourth exchange body.'}6100150. Device () according to claim 5 , wherein the means () for cooling the second compound is an exchanger of heat between the second compound and water.7100131150130170115. Device () according to one of to claim 5 , which comprises claim 5 , between an outlet () for the second compound of the means () for cooling the second compound and the third exchange body () claim 5 , a circuit () for cooling the second compound with the heavy fraction of the first mixture inside the first exchange body ().8100170120. Device () ...

Device and method for liquefying a natural gas and ship comprising such a device

The device (400) for liquefying a natural gas comprises: a compressor (105) of a first vaporized coolant chemical mixture, a means (110) for fractionating the compressed mixture into a heavy fraction and a light fraction, —a first body (115) for exchanging heat between the heavy fraction of the first mixture and the natural gas to cool at least the natural gas, a second body (120) for exchanging heat between the light fraction of the first mixture and the natural gas cooled in the first exchange body to liquefy the natural gas, —a conduit (125) for returning the first vaporized coolant mixture in the heat exchange bodies to the compressor, —a regulator (405) for the liquefied natural gas, a collector (410) for the evaporation gas produced during the expansion of the gas in the regulator, —a conduit (415) for injecting the evaporation gas at the inlet of the second exchange body, upstream of an inlet (116) for the natural gas in the first exchange body (115), a third body (420) for exchanging heat between the natural gas and a second chemical coolant compound, —a means (425) for compressing the second vaporized compound, a means (430) for cooling the second compressed compound and a conduit (435) for transferring the second cooled compound towards the third exchange body.

REFRIGERATION CYCLE FOR LIQUID OXYGEN DENSIFICATION

Closed-loop refrigeration cycles for liquid oxygen densification are disclosed. The disclosed refrigeration cycles may be turbine-based refrigeration cycles or a Joule-Thompson (JT) expansion valve based refrigeration cycles and include a refrigerant or working fluid comprising a mixture of neon or helium together with nitrogen and/or oxygen. 1. (canceled)2. (canceled)3. (canceled)4. (canceled)5. (canceled)6. (canceled)7. (canceled)8. (canceled)9. (canceled)10. (canceled)11. (canceled)12. A closed-loop refrigeration system for liquid oxygen densification comprising:a compressor configured to compress a working fluid having between 85 mol % and 95 mol % neon and/or helium and between 5 mol % and 15 mol % nitrogen and/or oxygen from a pressure above ambient pressure to a pressure between 120 psia and 155 psia;a heat exchanger in fluid communication with the outlet of the compressor configured to receive the compressed working fluid and cool the compressed working fluid via indirect heat exchange with a gaseous nitrogen stream and a liquid nitrogen stream to produce a cold, compressed working fluid;a turbine in fluid communication with the heat exchanger and configured to expand the cold, compressed working fluid and produce a refrigeration stream of expanded working fluid;an oxygen cooler in fluid communication with the turbine, the oxygen cooler configured to receive a stream of liquid oxygen and the refrigeration stream from the turbine, and subcool the stream of liquid oxygen to a temperature less than 66.5 K via indirect heat exchange with the refrigeration stream of expanded working fluid to produce a densified liquid oxygen stream; anda recirculating conduit configured to recirculate the warmed refrigeration stream to an inlet of the compressor where the warmed refrigeration stream is compressed as the working fluid.13. The closed-loop refrigeration system of claim 12 , wherein the working fluid at the inlet of the compressor is at a temperature of between 65 K ...

Liquefied gas cooling apparatus

A liquefied gas cooling apparatus includes: a gas flow path for carrying a liquefied gas that is liquefied by cooling; and a refrigeration unit including a refrigerating cycle formed by an evaporator for cooling the liquefied gas flowing through the gas flow path, a compressor, a condenser, and a throttle expansion unit. The refrigeration unit includes: an inlet-side open/close valve and an outlet-side open/close valve provided in an inlet path and an outlet path of the compressor, respectively; and a service open/close valve in a refrigerant path between the inlet-side open/close valve and the outlet-side open/close valve.

SYSTEM AND M ETHOD FOR SUPPLYING CRYOGENIC REFRIGERATION

Various systems and methods for suppling cryogenic refrigeration to supercomputing applications such as quantum computing operations are provided. The disclosed systems and methods are flexible, efficient and scaleable to meet the cryogenic refrigeration requirements of many supercomputing applications. The disclosed systems and methods include: (i) a liquid nitrogen based integrated refrigeration system that integrates a nitrogen refrigerator with a refrigeration load circuit; (ii) a closed loop liquid nitrogen based refrigerator that provides cooling to the refrigeration load circuit via indirect heat exchange between liquid nitrogen in a nitrogen refrigerator and a separate refrigerant in a closed-loop refrigeration load circuit; and (iii) a liquid air based integrated refrigeration system that integrates an air intake system with a refrigerator and a refrigeration load circuit. 1. A liquid nitrogen based integrated refrigeration system comprising:a nitrogen refrigerator having one or more recycle compressors, a warm booster compressor, a cold booster compressor, a warm turbine, a cold turbine, and a heat exchanger with at least one cooling passage and at least one recycle passage;wherein the nitrogen refrigerator is configured to receive a source of nitrogen gas and a nitrogen return stream and produce a nitrogen refrigerant stream;a refrigeration load circuit having an expansion valve or a liquid turbine, a separator, a buffer tank, and a refrigeration load;wherein the refrigeration load circuit is configured to: (a) receive the nitrogen refrigerant stream; (b) expand the nitrogen refrigerant stream in the expansion valve or the liquid turbine; (c) separate the expanded nitrogen refrigerant stream in the separator into a liquid portion and a vapor portion; (d) cool a refrigeration load with the liquid portion of the expanded nitrogen refrigerant stream while vaporizing the liquid portion of the expanded nitrogen refrigerant stream; and (e) return the vaporized ...

Multiple circuit cryogenic liquefaction of industrial gas

A method for more efficiently cooling and liquefying industrial gas wherein refrigeration for the cooling and liquefaction is generated using first and second defined multicomponent refrigerant fluids in separate refrigeration circuits to cover a wide temperature range from ambient to cryogenic temperature.

Gas liquefaction process with partial condensation of mixed refrigerant at intermediate temperatures

Method and apparatus for liquefying a hydrocarbon stream

Method and apparatus for liquefying a hydrocarbon stream such as natural gas. In the method, a hydrocarbon feed stream is passed through an NGL recovery system to separate the hydrocarbon feed stream into at least a methane-enriched overhead stream and a C 2 + enriched bottom stream. The methane-enriched overhead stream is then passed through at least a first compressor to provide a methane-compressed stream, which is liquefied the to provide a first liquefied stream. The pressure of the first liquefied stream is reduced to provide a mixed-phase stream, which is passed through an end gas/liquid separator to provide an end gaseous stream and a liquefied hydrocarbon product stream. The end gaseous stream is passed through one or more end-compressors to provide an end-compressed stream, of which at least a recycle fraction is fed into the methane-enriched overhead stream. The temperature of the first liquefied stream may be controlled to change the amount of the end gaseous stream.

Process for the production of liquefied natural gas

Natural gas liquefaction

A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled, expanded to an intermediate pressure, and supplied to a distillation column. The bottom product from this distillation column preferentially contains the majority of any hydrocarbons heavier than methane that would otherwise reduce the purity of the liquefied natural gas. The residual gas stream from the distillation column is compressed to a higher intermediate pressure, cooled under pressure to condense it, and then expanded to low pressure to form the liquefied natural gas stream.

Method and apparatus for liquefying a hydrocarbon stream

Method and apparatus for liquefying a hydrocarbon stream. A liquefaction system comprises at least an NGL recovery system 12 , a main refrigerant circuit 42 and a first refrigerant circuit 100 , a pressure reduction device 52 followed by an end gas/liquid separator 62 . The main refrigerant circuit 42 comprises at least one or more main refrigerant compressors 45, 45 a, 45 b , and the first refrigerant circuit comprises one or more first refrigerant compressors 101 . A hydrocarbon feed stream 10 is passed through the NGL recovery system 12 to produce a methane-enriched overhead stream 20 , which is subsequently cooled and liquefied by the first and second refrigerant circuits. The pressure of the liquefied stream is reduced and the resulting mixed-phase stream 60 is passed through the end gas/liquid separator 62 to provide an end gaseous stream 70 and a liquefied hydrocarbon product stream 80 . The loading power of the one or more main refrigerant compressors and the one or more first refrigerant compressors is maximized to their maximum load by adjusting temperature of the liquefied stream to change the amount of end gaseous stream and by controlling an amount of the end gaseous stream being fed into the methane-enriched overhead stream 20 in a recycle stream 90 b.

Method and apparatus for liquefying a hydrocarbon stream

Method and apparatus for liquefying a hydrocarbon stream. A hydrocarbon feed stream is passed through an NGL recovery system to separate the hydrocarbon feed stream into at least a methane-enriched overhead stream and a C 2 + enriched bottom stream. The methane-enriched overhead stream is then passed through a first compressor to provide a methane-compressed stream, which is liquefied to provide a first liquefied stream. The pressure of the first liquefied stream is reduced to provide a mixed phase stream, which is passed through an end gas/liquid separator to provide an end gaseous stream and a liquefied hydrocarbon product stream. The end gaseous stream is passed through one or more end-compressors to provide an end compressed stream, of which at least a recycle fraction is fed into the methane-enriched overhead stream. The temperature of the first liquefied stream may be controlled to change the amount of the end gaseous stream.

Dual system with mixed coolant

FIELD: liquefaction, solidification or separation of gases. SUBSTANCE: invention relates to extraction of liquefied natural gas flow from gas supplied flow using double closed circuits with mixed coolant. Method of liquefying a hydrocarbon-containing gas comprises cooling a feed stream in a first cooling system by indirect heat exchange with a first mixed coolant to form a first cooled fed stream and cooling the first cooled fed stream in the second cooling system by indirect heat exchange with the second mixed coolant to form a second cooled fed stream. Further, at least a portion of the first or second cooled fed stream is expanded in the turboexpander, is separated in a separator to form a vapour head fraction and a liquid bottom fraction, and at least a portion of the steam head fraction is compressed in a compressor driven by a turboexpander. If the first cooled fed stream is expanded, the compressed vapour fraction is cooled in the first cooling system. If the second cooled fed stream is expanded, at least a portion of the compressed vapour fraction is cooled in the second cooling system. EFFECT: technical result is reduction of energy consumption. 16 cl, 7 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 696 662 C2 (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F25J 1/0022 (2019.05); F25J 1/0035 (2019.05); F25J 1/0042 (2019.05); F25J 1/0052 (2019.05); F25J 1/0057 (2019.05); F25J 1/0214 (2019.05); F25J 1/0238 (2019.05); F25J 1/0288 (2019.05); F25J 1/0292 (2019.05) (21)(22) Заявка: 2017110052, 04.08.2015 04.08.2015 Дата регистрации: Приоритет(ы): (30) Конвенционный приоритет: 29.08.2014 US 14/473,403 (43) Дата публикации заявки: 01.10.2018 Бюл. № 28 (45) Опубликовано: 05.08.2019 Бюл. № 22 (56) Список документов, цитированных в отчете о поиске: US 2004003625 A1, 08.01.2004. RU 2141084 C1, 10.11.1999. US 2004255617 A1, 23.12.2004. US 6367286 B1, 09.04.2002. RU 2175099 C2, 20.10.2001. (86) ...

用于冷却烃流的方法和系统

一种通过使用混合冷却系统和方法来提高天然气液化过程的效率的系统和方法。更具体地说，一种用于将跨临界预冷制冷过程转换成亚临界过程的系统和方法。一个实施方案中，使用节能器将制冷剂冷却到亚临界温度。在另一实施方案中，使用辅助热交换器将制冷剂冷却到亚临界温度。任选地，节能器或辅助热交换器当环境温度足够低以将制冷剂冷却到亚临界温度时可以被旁路。在另一实施方案中，制冷剂是等熵膨胀的。

Method for cooling the hydrocarbon feed stream and installation for cooling the hydrocarbon feed stream cooling the hydrocarbon stream

FIELD: gas industry. SUBSTANCE: system and a method for improving the efficiency of natural gas liquefaction processes by using a hybrid method and a cooling system are proposed. In particular, a system and a method for converting a transcritical refrigeration process into a subcritical process are proposed. In one embodiment, the refrigerant is cooled down to a critical temperature using an economizer. In another embodiment, the refrigerant is cooled down to a critical temperature using an auxiliary heat exchanger. In some cases, the use of the economizer or auxiliary heat exchanger can be avoided when the ambient temperature is low enough to cool the refrigerant down to a subcritical temperature. In another embodiment, the refrigerant expands isentropically. EFFECT: increased efficiency of natural gas liquefaction processes. 13 cl, 14 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 748 319 C2 (51) МПК F25J 3/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F25B 1/10 (2021.02); F25B 41/39 (2021.02); F25B 6/04 (2021.02); F25B 9/00 (2021.02); F25B 9/008 (2021.02); F25J 1/0022 (2021.02); F25J 1/0052 (2021.02); F25J 1/0057 (2021.02); F25J 1/0072 (2021.02); F25J 1/0085 (2021.02); F25J 1/0095 (2021.02); F25J 1/0205 (2021.02); F25J 1/0207 (2021.02); F25J 1/0215 (2021.02); F25J 1/0218 (2021.02); F25J 1/0227 (2021.02); F25J 1/0245 (2021.02); F25J 1/0245 (2021.02); F25J 1/0262 (2021.02); F25J 1/0265 (2021.02); F25J 1/0268 (2021.02) 2018108055, 06.03.2018 (24) Дата начала отсчета срока действия патента: 06.03.2018 (72) Автор(ы): КРИШНАМУРТИ Говри (US), РОБЕРТС Марк Джулиан (US) 24.05.2021 Приоритет(ы): (30) Конвенционный приоритет: 27.11.2017 US 15/822,713; 04.12.2017 US 15/830,330 (43) Дата публикации заявки: 06.09.2019 Бюл. № 25 (56) Список документов, цитированных в отчете о поиске: US 6722157 B1, 20.04.2004. RU 2141084 C1, 10.11.1999. RU 2505762 C2, 27.01.2014. DE 102012017653 A1, 06.03.2014. CN 106440656 A ...

Сжижение природного газа с удалением исходной воды

1. Способ для осушки и сжижения потока природного газа, включающий:(a) охлаждение потока исходного природного газа, который содержит воду, для получения охлажденного потока природного газа;(b) удаление воды и дальнейшее охлаждение охлажденного потока исходного природного газа для получения осушенного охлажденного потока природного газа;(c) нагревание осушенного охлажденного потока природного газа для получения осушенного повторно нагретого потока природного газа;(d) охлаждение и сжижение осушенного повторно нагретого потока природного газа и охлаждение по меньшей мере одного сжатого потока исходного хладагента посредством противоточного косвенного теплообмена с расширенным холодным хладагентом, для получения потока продукта сжиженного природного газа, по меньшей мере одного потока сжатого холодного хладагента и потока расширенного нагретого хладагента; и(e) расширение и вследствие этого, дальнейшее охлаждение потока или потоков сжатого холодного хладагента для получения упомянутого расширенного холодного хладагента;где охлаждение потока исходного природного газа на стадии (a) и нагревание осушенного охлажденного потока природного газа на стадии (c) осуществляется посредством косвенного теплообмена между двумя упомянутыми потоками.2. Способ по п.1, где на стадии (c) осушенный охлажденный поток природного газа нагревается до температуры, которая является такой же или находится в пределах 20°C от температуры по меньшей мере одного сжатого потока исходного хладагента, так что разность температур между осушенным повторно нагретым потоком природного газа и по меньшей мере одним сжатым потоком исходного � РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2013 116 391 A (51) МПК B01D 53/14 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2013116391/05, 10.04.2013 (71) Заявитель(и): ЭР ПРОДАКТС ЭНД КЕМИКАЛЗ, ИНК. (US) Приоритет(ы): (30) Конвенционный приоритет: 11.04.2012 US 13/444,061 Адрес для переписки: 129090, Москва, ул. Б. ...

双重混合制冷剂系统

提供用于使用双重闭环混合制冷剂循环从含烃进料气流中回收液化天然气(LNG)流的方法和系统。具体而言，本文中描述的方法和系统可用于通过使用利用第一混合制冷剂和第二混合制冷剂的第一制冷系统和第二制冷系统从含烃进料气流中高效且有效地液化甲烷。

Способ и устройство для охлаждения и разделения углеводородного потока

1. Способ охлаждения и разделения углеводородного потока, например природного газа, содержащий, по меньшей мере, следующие этапы: ! (a) обеспечение углеводородным потоком; ! (b) охлаждение углеводородного потока для получения частично сжиженного углеводородного потока, при этом, по меньшей мере, часть охлаждения обеспечивают посредством частичного или полного испарения охлажденного потока хладагента; ! (c) поступление, по меньшей мере, части частично сжиженного углеводородного потока в дистилляционную колонну через первое входное отверстие; ! (d) обеспечение нижним сырьевым потоком; ! (e) обеспечение контуром хладагента, содержащим, по меньшей мере, один поток сжатого, полностью сжиженного хладагента; ! (f) нагрев нижнего сырьевого потока противоточным потоком сжатого, полностью сжиженного хладагента для получения нагретого нижнего сырьевого потока и охлажденного потока хладагента; ! (g) подачу нагретого нижнего сырьевого потока в дистилляционную колонну через второе входное отверстие, расположенное ниже первого входного отверстия; и ! (h) разделение частично сжиженного углеводородного потока в дистилляционной колонне для получения, по меньшей мере, первого верхнего газообразного потока и первого донного жидкого потока. ! 2. Способ по п.1, в котором, по меньшей мере, одна фракция первого донного жидкого потока обеспечивает, по меньшей мере, одну фракцию нижнего сырьевого потока. ! 3. Способ по п.1, в котором одна фракция углеводородного потока обеспечивает, по меньшей мере, одну фракцию нижнего сырьевого потока. ! 4. Способ по п.3, в котором углеводородный поток делят, по меньшей мере, на первый и второй частичные пото РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2010 138 604 (13) A (51) МПК F25J 1/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2010138604/06, 18.02.2009 (71) Заявитель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) Приоритет(ы): (30) Конвенционный приоритет: 20.02.2008 EP 08101798.0 (85) Дата ...

Сдвоенная система со смешанным хладагентом

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2017 110 054 A (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2017110054, 03.08.2015 (71) Заявитель(и): БЛЭК ЭНД ВИТЧ ХОЛДИНГ КОМПАНИ (US) Приоритет(ы): (30) Конвенционный приоритет: 29.08.2014 US 14/473,343 28 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 29.03.2017 US 2015/043444 (03.08.2015) (87) Публикация заявки PCT: A WO 2016/032697 (03.03.2016) Адрес для переписки: 129090, Москва, ул. Большая Спасская, д. 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" R U (57) Формула изобретения 1. Способ сжижения углеводородсодержащего газа, способ включает: (a) введение полностью конденсированного первого смешанного хладагента, сжатого второго смешанного хладагента и подаваемого потока, содержащего углеводородсодержащий газ, в первую систему охлаждения; (b) расширение, по меньшей мере, части полностью конденсированного первого смешанного хладагента с образованием расширенного первого смешанного хладагента, причем полностью конденсированный первый смешанный хладагент не подвергается воздействию разделения фаз до или после стадии расширения; (c) охлаждение, по меньшей мере, части подаваемого потока и сжатого второго смешанного хладагента в первой системе охлаждения посредством косвенного теплообмена с расширенным первым смешанным хладагентом с образованием первого охлажденного подаваемого потока и полностью конденсированного второго смешанного хладагента; (d) расширение, по меньшей мере, части полностью конденсированного второго смешанного хладагента с образованием расширенного второго смешанного хладагента; и (e) охлаждение, по меньшей мере, части первого охлажденного подаваемого потока во второй системе охлаждения посредством косвенного теплообмена с расширенным Стр.: 1 A 2 0 1 7 1 1 0 0 5 4 (54) СДВОЕННАЯ СИСТЕМА СО СМЕШАННЫМ ХЛАДАГЕНТОМ 2 0 1 7 1 1 0 0 5 4 (86) Заявка PCT: R U (43) Дата публикации заявки: 04.10.2018 Бюл. ...

METHOD FOR LIQUIDING THE FLOW OF HYDROCARBONS AND A DEVICE FOR ITS IMPLEMENTATION

1. Способ сжижения потока углеводородов, такого, как поток природного газа, содержащегося в сырьевом потоке (10), включающий, по меньшей мере, стадии: ! (a) циркуляции потока (70) первого хладагента в контуре (110) с первым хладагентом; ! (b) охлаждения потока (70) первого хладагента в одном или более теплообменниках (14) первой ступени (100) охлаждения для получения охлажденного потока (20) первого хладагента; ! (c) прохождения, по меньшей мере, части охлажденного потока (20) первого хладагента через одно или более расширительных устройств для получения одного или более расширенных охлажденных потоков (30) первого хладагента; ! (d) прохождения одного или, по меньшей мере, одного из расширенных потоков (30) первого хладагента и сырьевого потока (10) через первый один или более теплообменников (14) с получением охлажденного потока (40) углеводородов; ! (e) прохождения охлажденного потока (40) углеводородов через вторую ступень (200) охлаждения в противотоке с потоком (50) второго хладагента с получением сжиженного потока (60) углеводородов; ! в котором, по меньшей мере, одно расширительное устройство представляет собой детандер (12), выработанную которым на стадии (с) полезную энергию используют в контуре (110) циркуляции первого хладагента, причем выработанную полезную энергию используют для привода одного или более насосов (28а, 28b), обеспечивающих циркуляцию потока первого хладагента, с целью повышения давления потока (70) первого хладагента, обеспечивая тем самым получение нагнетаемого потока (70а) и температуру указанного нагнетаемого потока (70а) снижают в одном или более охладителях (29), охлаждающих до температуры окружающей среды перед прохождение РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2009 106 092 (13) A (51) МПК F25J 1/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21), (22) Заявка: 2009106092/06, 19.07.2007 (71) Заявитель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) (30) ...

Method for determining mixed refrigerant composition of natural gas liquefier

Method of providing cold for liquefying raw material gas

Procedure for liquefaction of hydrocarbon flow and device for its realisation

FIELD: machine building. SUBSTANCE: raw stock flow (10) runs in counter-flow with mixed cooling agent circulating through heat exchanger (12). There is produced partially liquefied flow (20) of hydrocarbons of temperature less, than 100°C. Mixed cooling agent comes out of heat exchanger (12) in form of liquid and gaseous flow (18) of cooling agent which passes through first separator (18) and there is produced flow (110) of liquid cooling agent and flow (90) of vapour-like cooling agent. Flow (110) of liquid cooling agent returns to heat exchanger (12) without essential heat exchanging. Flow (90) of vapour-like cooling agent is compressed producing compressed flow (95) of cooling agent which is cooled producing compressed cooled flow (100) of temperature below 0°C. Compressed cooled flow (100) is returned to heat exchanger (12). EFFECT: maximal transfer of heat through surface of heat exchange in liquefying heat exchanger. 13 cl, 1 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 432 534 (13) C2 (51) МПК F25J 1/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009105108/06, 12.07.2007 (24) Дата начала отсчета срока действия патента: 12.07.2007 (72) Автор(ы): ЯГЕР Марко Дик (NL), КАРТ Сандер (NL) 2 4 3 2 5 3 4 (43) Дата публикации заявки: 27.08.2010 Бюл. № 24 (45) Опубликовано: 27.10.2011 Бюл. № 30 2 4 3 2 5 3 4 R U (85) Дата начала рассмотрения заявки PCT на национальной фазе: 16.02.2009 C 2 C 2 (56) Список документов, цитированных в отчете о поиске: US 4180123 A, 25.12.1979. WO 2006007278 A2, 19.01.2006. DE 19937623 A1, 15.02.2001. US 4112700 A, 12.09.1978. RU 2175099 C2, 20.10.2001. (86) Заявка PCT: EP 2007/057134 (12.07.2007) (87) Публикация заявки РСТ: WO 2008/006867 (17.01.2008) Адрес для переписки: 103735, Москва, ул.Ильинка, 5/2, ООО "Союзпатент", пат.пов. О.И.Воль, рег. № 1101 (54) СПОСОБ ДЛЯ СЖИЖЕНИЯ ПОТОКА УГЛЕВОДОРОДОВ И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ (57) ...

Multiple circuit cryogenic liquefaction of industrial gas

一种用于更加高效地冷却和液化工业气体的方法,其中采用不同制冷回路中的第一和第二所定义的多组分制冷剂流体来产生包括从环境温度到低温的宽的温度范围内实现冷却和液化所需的制冷作用。

Method of and device for generation of cooled hydrocarbon flow

FIELD: power engineering. SUBSTANCE: first (30) and second (30a) liquefied flows of hydrocarbons are produced, and they are combined to thus produce a combined liquefied flow (40) of hydrocarbons. The specified combined liquefied flow (40) of hydrocarbons is then additionally cooled in a counterflow with a coolant, and as a result, an additionally cooled liquefied flow (50) is produced, for instance, a flow of a liquefied natural gas (LNG). EFFECT: reduced capital and operational expenses. 20 cl, 4 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 452 908 (13) C2 (51) МПК F25J 1/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009115190/06, 20.09.2007 (24) Дата начала отсчета срока действия патента: 20.09.2007 (56) Список документов, цитированных в отчете о поиске: WO 2006/009646 А2, 26.01.2006. RU 2137066 С2, 10.09.1999. WO 2006/087331 А1, 24.08.2006. US 4228660 А, 21.10.1980. RU 2137067 С1, 10.09.1999. 2 4 5 2 9 0 8 R U (86) Заявка PCT: EP 2007/059959 (20.09.2007) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 22.04.2009 (87) Публикация заявки РСТ: WO 2008/034874 (27.03.2008) Адрес для переписки: 109012, Москва, ул.Ильинка, 5/2, ООО "Союзпатент", пат.пов. О.И.Воль, рег. № 1101 (54) СПОСОБ И УСТРОЙСТВО ДЛЯ ПОЛУЧЕНИЯ ОХЛАЖДЕННОГО ПОТОКА УГЛЕВОДОРОДОВ (57) Реферат: Способ и устройство для охлаждения двух или большего количества сжиженных потоков углеводородов. Получают первый (30) и второй (30а) сжиженные потоки углеводородов и объединяют их с образованием тем самым объединенного сжиженного потока (40) углеводородов. Указанный объединенный сжиженный поток (40) углеводородов затем дополнительно охлаждают в противотоке с хладагентом и в результате получают дополнительно охлажденный сжиженный поток (50) углеводородов, например поток сжиженного природного газа (СПГ). Использование изобретения позволит снизить капитальные и эксплуатационные затраты. 2 н. и 18 з.п. ф-лы, 4 ил., 2 табл. ...

Natural gas liquefaction

천연 가스의 액화 공정이, 메탄보다 중질인 탄화수소를 주로 함유하는 액체 스트림의 생성과 함께 개시되어 있다. 본 공정에서, 액화시킬 천연 가스 스트림은 부분적으로 냉각되며, 중간 압력으로 팽창되고, 증류 칼럼으로 공급된다. 이 증류 칼럼으로부터의 저부 생성물은 액화 천연 가스의 순도를 감소시키는 메탄보다 중질인 임의의 탄화수소의 대부분을 우선적으로 함유한다. 증류 칼럼으로부터의 잔류 가스 스트림은 보다 높은 중간 압력으로 압축되며, 가압 하에 냉각되어 이를 응축시키고, 이어서 낮은 압력으로 팽창되어 액화 천연 가스 스트림을 형성한다. The liquefaction process of natural gas is disclosed with the production of a liquid stream that mainly contains hydrocarbons heavier than methane. In this process, the natural gas stream to be liquefied is partially cooled, expanded to medium pressure and fed to the distillation column. The bottoms product from this distillation column preferentially contains most of any hydrocarbons that are heavier than methane, which reduces the purity of the liquefied natural gas. The residual gas stream from the distillation column is compressed to a higher intermediate pressure, cooled under pressure to condense it, and then expanded to a lower pressure to form a liquefied natural gas stream.

Patent RU2018108052A3

`”ВУ“” 2018108052`” АЗ Дата публикации: 23.10.2020 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 2018108052/12(012494) 06.03.2018 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. 15/822,799 27.11.2017 05 2. 15/830,269 04.12.2017 05 Название изобретения (полезной модели): [Х] - как заявлено; [ ] - уточненное (см. Примечания) УСОВЕРШЕНСТВОВАННЫЕ СПОСОБ И СИСТЕМА ДЛЯ ОХЛАЖДЕНИЯ УГЛЕВОДОРОДНОГО ПОТОКА Заявитель: ЭР ПРОДАКТС ЭНД КЕМИКАЛЗ, ИНК., 05 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) Е25.7 1/00 (2006.01) 5. ОБЛАСТЬ ПОИСКА 5.1 Проверенный минимум документации РСТ (указывается индексами МПК) Е257 1/00, 1/02 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): Езрасепе, РАТЕМТЬСОРЕ, Рабъеагсв, КОРТО, ИЗРТО 6. ДОКУМЕНТЫ, ОТНОСЯЩИЕСЯ К ПРЕДМЕТУ ПОИСКА Кате- Наименование документа с указанием (где необходимо) частей, Относится к Г ория* относящихся к предмету поиска пункту ...

Natural gas liquefaction

천연 가스의 액화 공정이, 메탄보다 중질인 탄화수소를 주로 함유하는 액체 스트림의 생성과 함께 개시되어 있다. 본 공정에서, 액화시킬 천연 가스 스트림은 부분적으로 냉각시키고, 제1 및 제2 스트림으로 분할한다. 제1 스트림은 추가로 냉각하여 실질적으로 그의 전부를 응축시키고, 중간 압력으로 팽창시키며, 또한 그 후 증류 칼럼으로 제1 중간-칼럼 공급 지점에서 공급한다. 또한, 제2 스트림은 중간압력으로 팽창시키고, 그 후 증류 칼럼으로 제2 하부 중간-칼럼 공급 지점에서 공급한다. 증류 스트림은 제2 스트림의 공급 지점 아래의 칼럼으로부터 인출하고, 냉각하여 그의 적어도 일부를 응축시키고, 환류 스트림을 형성한다. 환류 스트림의 적어도 일부는 증류 칼럼으로 그의 최상부 공급물로써 인도한다. 이 증류 칼럼으로부터의 저부(bottom) 생성물은, 상기 액화 천연 가스의 순도를 감소시키는 메탄보다 중질인 임의의 탄화수소의 대부분을 우세하게 함유한다. 상기 증류 칼럼으로부터의 상기 잔류 가스 스트림은 보다 높은 중간 압력으로 압축하고, 가압하에 냉각하여 이를 응축시키고, 그 후 낮은 압력으로 팽창시켜 액화 천연 가스 스트림을 형성한다. The liquefaction process of natural gas is disclosed with the production of a liquid stream that mainly contains hydrocarbons heavier than methane. In this process, the natural gas stream to be liquefied is partially cooled and split into first and second streams. The first stream is further cooled to condense substantially all of it, expand to medium pressure, and then feed it to the distillation column at the first mid-column feed point. In addition, the second stream is expanded to medium pressure and then fed to the distillation column at the second lower mid-column feed point. The distillation stream is withdrawn from the column below the feed point of the second stream, cooled to condense at least a portion thereof and form a reflux stream. At least a portion of the reflux stream is led to the distillation column as its top feed. The bottom product from this distillation column predominantly contains the majority of any hydrocarbons that are heavier than methane, which reduces the purity of the liquefied natural gas. The residual gas stream from the distillation column is compressed to a higher intermediate pressure, cooled under pressure to condense it, and then expanded to a lower pressure to form a liquefied natural gas stream.

Equipment for cooling down hydrocarbon stream

一种通过使用混合冷却系统和方法来提高天然气液化过程的效率的系统和方法。更具体地说，一种用于将跨临界预冷制冷过程转换成亚临界过程的系统和方法。在一个实施方案中，使用节能器将制冷剂冷却到亚临界温度。在另一实施方案中，使用辅助热交换器将制冷剂冷却到亚临界温度。任选地，节能器或辅助热交换器当环境温度足够低以将制冷剂冷却到亚临界温度时可以被旁路。在另一实施方案中，制冷剂是等熵膨胀的。

Method and device for controllable monitoring of yield and temperature in equipment with combined cooling intended for liquefaction of natural gas

FIELD: liquefaction of natural gas through heat exchange with closed cooling cycle. SUBSTANCE: control of cooling temperature is effected by means of using main variables: compressor rotational speed in one version and ratio of total flow of circulating cooling agent to flow rate of liquefied natural gas in other version. EFFECT: possibility of obtaining liquefied gas at temperature and in amount in accordance with production assignment. 34 cl, 10 dwg 5 О9сСУгс ПЧ ГЭ РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (19) ВИ "” 2142 605 Сл (51) МПК Е 25 4 1/02 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 98114480/06, 23.07.1998 (24) Дата начала действия патента: 23.07.1998 (30) Приоритет: 24.07.1997 1$ 081/899,899 (46) Дата публикации: 10.12.1999 (56) Ссылки: 4$ 3763658 А, 09.10.73. 4$ 4809154 А, 28.02.89. КЦ 2060431 СЛ, 20.05.96. $4 1357662 АЛ, 07.12.87. ЕК 2074594 А, 12.11.71. 4$ 4582519 А, 15.04.86. (98) Адрес для переписки: 129010, Москва, ул.Б.Спасская, 25, стр.3, ООО "Союзпатент", патентному поверенному Мицу А.В. (71) Заявитель: ЭР Продактс энд Кемикалз, Инк. (ЦЗ) (72) Изобретатель: Джордж Анибал Мэндлер (ЦЭ), Филип А.Брочу (1$), Джэймс Роберт Гамильтон (младший) (ЦЗ) (73) Патентообладатель: ЭР Продактс энд Кемикалз, Инк. (05) (54) СПОСОБ И УСТРОЙСТВО ДЛЯ РЕГУЛИРУЕМОГО КОНТРОЛЯ ВЫРАБОТКИ И ТЕМПЕРАТУРЫ В ОБОРУДОВАНИИ СО СМЕШАННЫМ ХЛАДАГЕНТОМ, ПРЕДНАЗНАЧЕННОМ ДЛЯ СЖИЖЕНИЯ ПРИРОДНОГО ГАЗА (57) Реферат: Система — регулирования — процесса сжижения природного газа посредством теплообмена с замкнутым холодильным ЦИКЛОМ обеспечивает независимое управление температурой сжижения и производительностью. Для регулирования температуры охлаждения в качестве ключевых переменных могут быть в одном варианте частота вращения компрессора, а в другом - отношение суммарного расхода циркулирующего хладагента к расходу сжиженного природного газа. Использование изобретения позволит получать сжиженный газ при температуре и в количестве, соответствующем ...

Natural Gas Liquefaction Process

本发明公开的是一种使用采用了混合制冷剂的单一制冷循环的天然气液化方法，且因此具有简单的构造和因此紧凑的、容易操作的系统，且进一步地，混合制冷剂被分离为两种制冷剂部分之后，该两种制冷剂部分没有被相互混合但是独立地经历冷凝(冷却)、膨胀、热交换和压缩的阶段，且因此，对每一种被分离的制冷剂部分适用最佳的温度和压力条件以提高液化方法的效率。

PROCESS FOR THE LIQUEFACTION AND DEAZOTATION OF NATURAL GAS, THE INSTALLATION FOR IMPLEMENTATION, AND GASES OBTAINED BY THIS SEPARATION

Improved method and system for cooling a hydrocarbon stream

하이브리드 냉각 시스템 및 방법을 사용하여 천연 가스 액화 공정의 효율을 증가시키는 시스템 및 방법이 개시된다. 보다 구체적으로, 초임계 예냉 냉각 공정을 준임계 공정으로 전환하기 위한 시스템 및 방법이 개시된다. 일 구현예에서, 냉매는 절약형 장치를 사용하여 준임계 온도까지 냉각된다. 다른 구현예에서, 냉매는 보조 열 교환기를 사용하여 준임계 온도까지 냉각된다. 선택적으로, 주변 온도가 냉매를 준임계 온도로 냉각시키기에 충분히 낮으면, 절약형 장치 또는 보조 열 교환기가 바이패스될 수 있다. 다른 구현예에서, 냉매는 등엔트로피로 팽창된다. Systems and methods for increasing the efficiency of natural gas liquefaction processes using hybrid cooling systems and methods are disclosed. More specifically, systems and methods for converting a supercritical pre-cooling process to a sub-critical process are disclosed. In one embodiment, the refrigerant is cooled to a subcritical temperature using an economy type device. In another embodiment, the refrigerant is cooled to a subcritical temperature using an auxiliary heat exchanger. Optionally, if the ambient temperature is low enough to cool the refrigerant to a subcritical temperature, an economizer or auxiliary heat exchanger can be bypassed. In other embodiments, the refrigerant is expanded to isentropic.

Method and apparatus for controlling yield and temperature in mixed refrigerant liquefied natural gas plant

열교환기 및 폐쇄 루프 냉각 사이클을 사용하여 천연가스로부터의 액화 천연가스(LNG) 생산을 제어하는 시스템은 설정된 생산값에 부합하도록 냉각과정을 조절하므로써 생산량 및 온도 모두를 별도로 직접 제어한다. 상기 제어 시스템은 LNG 생산을 요구되는 생산값으로 설정하고 제어하며 이와는 별도로, 천연가스 스트림에 제공되는 냉각정도를 조절하므로써 LNG 온도를 제어한다. 하나의 예시적인 방법에서는, 예를 들면 LNG 온도를 빠르고 안정하게 조정하기 위해 중요 조작 변수(MV)로서 압축기 속도를 사용한다. 사용되는 혼합 냉매(MR) 압축기 유형에 따라 속도 이외의 기타 압축기 변수가 중요 MV가 될 수 있으며 이는 원심 압축기의 안내 날개 각 또는 축방향 압축기의 고정자 날개 각일 수 있다. 제2의 예시적인 방법은 전체 재순환 냉매 유속 대 LNG 유속의 비를 중요 조작 변수로서 사용하여 LNG 온도를 효과적으로 제어한다. Systems that control the production of liquefied natural gas (LNG) from natural gas using heat exchangers and closed-loop cooling cycles control both output and temperature separately directly by adjusting the cooling process to meet the set production values. The control system sets and controls the LNG production to the required production value, and separately controls the LNG temperature by adjusting the degree of cooling provided to the natural gas stream. In one exemplary method, the compressor speed is used as an important operating variable (MV), for example to quickly and stably adjust the LNG temperature. Depending on the type of mixed refrigerant (MR) compressor used, other compressor parameters than speed may be important MVs, which may be guide vane angles of centrifugal compressors or stator vane angles of axial compressors. The second exemplary method uses the ratio of total recycle refrigerant flow rate to LNG flow rate as an important operating variable to effectively control the LNG temperature.

Method for liquefaction of hydrocarbon flows and device for its realisation

FIELD: power engineering. SUBSTANCE: method for liquefaction of at least two hydrocarbon flows, such as natural gas, including at least the following stages: a) supply of at least first and second hydrocarbon flows (20, 20a); (b) sending the first hydrocarbon flow (20) via one or more first heat exchangers (12, 14) to form the first cooled hydrocarbon flow (30); and (c) sending the second hydrocarbon flow (20a) via one or more second heat exchangers (12a, 14a) to form the second cooled hydrocarbon flow (30a); where the coolant flow (100) provides for cooling of the first heat exchanger (heat exchangers) (12, 14) and the second heat exchanger (heat exchangers) (12a, 14a). EFFECT: using the invention will make it possible to increase plant efficiency and to reduce power consumption. 19 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 463 535 (13) C2 (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ Приоритет(ы): (30) Конвенционный приоритет: 23.10.2006 EP 06122725.2 (73) Патентообладатель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) (43) Дата публикации заявки: 27.11.2010 Бюл. № 33 2 4 6 3 5 3 5 (45) Опубликовано: 10.10.2012 Бюл. № 28 (56) Список документов, цитированных в отчете о поиске: WO 2006/087331 А1, 24.08.2006. WO 2006/009646 А2, 26.01.2006. US 6658891 В1, 09.12.2003. SU 1627097 A3, 07.02.1991. RU 2205337 С2, 27.05.2003. 2 4 6 3 5 3 5 R U (86) Заявка PCT: EP 2007/061316 (23.10.2007) C 2 C 2 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 25.05.2009 (87) Публикация заявки РСТ: WO 2008/049821 (02.05.2008) Адрес для переписки: 109012, Москва, ул. Ильинка, 5/2, ООО "Союзпатент", О.И.Воль (54) СПОСОБ ДЛЯ СЖИЖЕНИЯ УГЛЕВОДОРОДНЫХ ПОТОКОВ И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ (57) Реферат: Способ сжижения, по меньшей мере, двух углеводородных потоков, таких как природный газ, включает, по меньшей мере, стадии: а) подвода, по меньшей мере, первого и второго углеводородных потоков (20, 20а ...

Procedure for liquefaction of hydrocarbon flow and device for its realisation

FIELD: machine building. SUBSTANCE: procedure for liquefaction of flow of natural gas in raw stock flow (10) consists in stages of circulation of flow (70) of first cooling agent in circuit (110) with first cooling agent, in cooling flow (70) of first cooling agent in circuit (110) with first cooling agent in one or more heat exchangers (14) of first stage (100) of cooling, in passing at least part of cooled flow (20) of first cooling agent through one or more expanders (12) for obtaining one or more expanded cooled flows (30) of first cooling agent, in passing one or at least one of expanded flows (30) of first cooling agent and raw stock flow (10) through first one or more heat exchangers (14) producing cooled flow (40) of hydrocarbons, in passing cooled flow (40) of hydrocarbons through second stage (200) of cooling in counter flow with flow (50) of second cooling agent and in production of liquefied flow (60) of hydrocarbons. According to the procedure generated useful power is used in circuit (110) of first cooling agent circulation for drive of one or more pumps (28a, 28b) facilitating circulation of flow of the first cooling agent to build up pressure of flow (70) of the first cooling agent. Temperature of said charged flow (70a) is reduced in one or more coolants (29) cooling it to temperature of environment before it flows through first heat exchanger (14). EFFECT: raised efficiency. 20 cl, 1 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 434 190 (13) C2 (51) МПК F25J 1/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2009106092/06, 19.07.2007 (24) Дата начала отсчета срока действия патента: 19.07.2007 (72) Автор(ы): ЯГЕР Марко Дик (NL), КЛЕЙН НАГЕЛВОРТ Роберт (NL) R U (73) Патентообладатель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) Приоритет(ы): (30) Конвенционный приоритет: 21.07.2006 EP 06117663.2 (43) Дата публикации заявки: 27.08.2010 Бюл. № 24 2 4 ...

Natural gas liquefaction process and system using the same

혼합 냉매를 채용한 한 개의 폐 루프 냉동 사이클을 이용하여 제1 열교환 영역에서의 냉매와의 열교환을 통해 천연가스를 예냉시키고 제2 열교환 영역에서의 냉매와의 열교환을 통해 예냉된 천연가스를 액화시키는 천연가스 액화공정에 있어서, 상기 폐 루프 냉동 사이클은, 부분적으로 응축된 혼합 냉매를 액상 냉매 부분과 기상 냉매 부분으로 분리하는 분리 단계, 액상 냉매 부분을 이용하여 제1 열교환 영역에서 천연가스를 예냉하는 예냉 단계, 기상 냉매 부분을 이용하여 제2 열교환 영역에서 예냉된 천연가스를 액화하는 액화 단계, 예냉 단계 이후에 예냉 단계를 통해 천연가스를 예냉시킨 냉매 부분을 압축하는 제1 압축 단계, 액화 단계 이후에 액화 단계를 통해 천연가스를 액화시킨 냉매 부분을 압축하는 제2 압축 단계, 및 제1, 2 압축 단계를 통해 압축된 각각의 냉매 부분을 혼합하는 혼합 단계를 포함하며, 상기 액상 냉매 부분과 상기 기상 냉매 부분은 상기 분리 단계를 통해 분리된 이후에 상호간의 혼합 없이 독립된 루프를 경유하다 상기 혼합 단계에서 상호 혼합되는 것을 특징으로 한다. A single closed loop refrigeration cycle employing a mixed refrigerant precools natural gas through heat exchange with the refrigerant in the first heat exchange zone and liquefies the precooled natural gas through heat exchange with the refrigerant in the second heat exchange zone. In the natural gas liquefaction process, the closed loop refrigeration cycle is a separation step of separating the partially condensed mixed refrigerant into a liquid refrigerant portion and a gaseous refrigerant portion, and precooling the natural gas in the first heat exchange region using the liquid refrigerant portion. After the pre-cooling step, the liquefaction step of liquefying the natural gas pre-cooled in the second heat exchange zone by using the gaseous refrigerant part, after the pre-cooling step, the first compression step of compressing the refrigerant part pre-cooled the natural gas through the pre-cooling step, after the liquefaction step A second compression step of compressing the refrigerant portion in which the natural gas is liquefied through the liquefaction step, and first and second compression steps. A mixing step of mixing each compressed refrigerant portion, wherein the liquid refrigerant portion and the gaseous refrigerant portion are separated through the separation step and then pass through separate loops without mixing with each other. It is characterized by.

METHOD FOR LIQUIDATION OF HYDROCARBON FLOWS AND DEVICE FOR ITS IMPLEMENTATION

1. Способ сжижения, по меньшей мере, двух углеводородных потоков, таких как, по меньшей мере, два потока природного газа, включающий стадии: ! (a) подвода, по меньшей мере, первого и второго углеводородных потоков; ! (b) пропускания первого углеводородного потока через один или более первых теплообменников с образованием первого охлажденного углеводородного потока; ! (c) пропускания второго углеводородного потока через один или более вторых теплообменников с образованием второго охлажденного углеводородного потока; и ! (d) последующего сжижения названных первого и второго углеводородных потоков, в котором контур хладагента обеспечивает охлаждение одного или более первых теплообменников и одного или более вторых теплообменников путем пропускания отдельных потоков хладагента через один или более первых теплообменников стадии (b) и через один или более вторых теплообменников стадии (с) с последующим сжатием потоков хладагента и совместным охлаждением сжатых потоков хладагента в одном или более общих охладителях. ! 2. Способ по п.1, в котором стадия (b) включает пропускание первого углеводородного потока через 2, 3, 4 или 5 первых теплообменников, преимущественно через два первых теплообменника; и в котором стадия (с) включает пропускание второго углеводородного потока через 2, 3, 4 или 5 вторых теплообменников, преимущественно через два вторых теплообменника. ! 3. Способ по п.1, в котором указанное последующее сжатие потоков хладагента включает раздельное сжатие каждого отдельного потока хладагента. ! 4. Способ по п.2, в котором указанное последующее сжатие потоков хладагента включает раздельное сжатие каждого отдельног РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2009 119 472 (13) A (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21), (22) Заявка: 2009119472/06, 23.10.2007 (71) Заявитель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) (30) Конвенционный приоритет: 23.10.2006 EP 06122725.2 ...

Method and system for producing liquified natural gas

가스 팽창 타입의 LNG 액화 시스템의 효율성을 최적화하는 방법 및 시스템에 관한 것이며, 유입되는 공급 가스는 먼저 분별 증류관에서 저온 환류 유체와의 역전류 접촉에 의해 분리되고, 중간 핀치 지점이 고온 복합 곡선에서 생성되도록, 감소된 온도에서 열 교환기 시스템 내에 기체 스트림이 도입된다. The present invention relates to a method and system for optimizing the efficiency of a gas-expansion type LNG liquefaction system, wherein the incoming feed gas is first separated by reverse-flow contact with a low temperature reflux fluid in a fractionation distillation column, A gas stream is introduced into the heat exchanger system at a reduced temperature.

METHOD FOR COOLING A HYDROCARBON FLOW AND A DEVICE FOR ITS IMPLEMENTATION

1. Способ охлаждения углеводородного потока в теплообменнике, включающий по меньшей мере следующие стадии: ! (a) подача углеводородного потока; ! (b) теплообмен углеводородного потока в первом теплообменнике с по меньшей мере одним потоком хладагента, характеризующимся определенной скоростью потока хладагента, в результате чего получают охлажденный углеводородный поток, характеризующийся определенной скоростью углеводородного потока, и по меньшей мере один возвратный поток хладагента; ! (c) ввод первого заданного значения для скорости потока хладагента; и ! (d) доводка скорости потока хладагента и скорости углеводородного потока до достижения заданного значения, в котором: ! (d1) если первое заданное значение больше скорости потока хладагента, то скорость углеводородного потока повышают прежде чем повысить скорость потока хладагента; ! (d2) если первое заданное значение меньше скорости потока хладагента, то скорость потока хладагента понижают прежде чем понизить скорость углеводородного потока; и ! (d3) если скорость углеводородного потока снижается, то уменьшают скорость потока хладагента. ! 2. Способ по п.1, в котором доводка скорости потока хладагента и скорости углеводородного потока на стадии (d) осуществляется автоматически. ! 3. Способ по п.1, в котором отношение [скорость потока хладагента]/[скорость углеводородного потока] на стадии (d) поддерживается на заданном уровне или ниже его. ! 4. Способ по п.1, в котором: ! - скорость потока хладагента измеряется с помощью регулятора скорости потока хладагента, который генерирует сигнал скорости потока хладагента, который передается на высокоуровневый селектор, прич РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2011 115 190 (13) A (51) МПК F25J 1/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (71) Заявитель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) (21)(22) Заявка: 2011115190/06, 11.09.2009 Приоритет(ы): (30) Конвенционный приоритет: 19.09.2008 EP 08164727.3 (85) Дата начала ...

Method of cooling hydrocarbon stream and apparatus therefor

在冷却烃物流的方法和设备中，要冷却的烃物流(45)在第一热交换器(50)中与具有第一制冷剂物流流量(FR1)的至少一个制冷剂物流(145b、185b)进行热交换，从而提供具有冷却的烃物流流量(FR2)的冷却的烃物流(55)，和至少一个返回制冷剂物流(105)。第一制冷剂物流流量(FR1)和冷却的烃物流流量(FR2)按照下列方式调节，直到达到用于第一制冷剂物流流量(FR1)的输入第一设定值(SP1)。如果第一设定值(SP1)大于第一制冷剂物流流量(FR1)，则冷却的烃物流流量(FR2)在第一制冷剂物流流量(FR1)增大之前增大；如果第一设定值(SP1)小于第一制冷剂物流流量(FR1)，则第一制冷剂物流流量(FR1)在冷却的烃物流流量(FR2)减小之前减小；以及如果冷却的烃物流流量(FR2)减小，则第一制冷剂物流流量(FR1)减小。

Gas condensation process with partial condensation of mixed refrigerant at intermediate temperatures

Natural gas liquefaction

Method of cooling a hydrocarbon stream and an apparatus therefor

In a method of, and apparatus for, cooling a hydrocarbon stream, a hydrocarbon stream (45) to be cooled is heat exchanged in a first heat exchanger (50) against at least one refrigerant stream (145b, 185b) having a first refrigerant stream flow rate (FR1), to provide a cooled hydrocarbon stream (55) having a cooled hydrocarbon stream flow rate (FR2) and at least one return refrigerant stream (105). The first refrigerant stream flow rate (FR1) and the cooled hydrocarbon stream flow rate (FR2) are adjusted as follows, until an inputted first set point (SP1) for the first refrigerant stream flow rate (FR1) is achieved. If the first set point (SP1) is greater than the first refrigerant stream flow rate (FR1), then the cooled hydrocarbon stream flow rate (FR2) is increased before the first refrigerant stream flow rate (FR1) is increased; if the first set point (SP1) is less than the first refrigerant stream flow rate (FR1), then the first refrigerant stream flow rate (FR1) is decreased before the cooled hydrocarbon stream flow rate (FR2) is decreased; and if the cooled hydrocarbon stream flow rate (FR2) decreases, then the first refrigerant stream flow rate (FR1) is decreased.

Process and plant for producing liquefied natural gas

The invention relates to a process for producing liquefied natural gas (LNG), in which natural gas (NG) feed comprising methane and higher hydrocarbons including benzene is cooled down to a first temperature level in a first cooling step using a first mixed coolant (WMR) and then subjected to a countercurrent absorption using an absorption liquid to form a methane-enriched and benzene-depleted gas fraction, wherein a portion of the gas fraction is cooled down to a second temperature level in a second cooling step using a second mixed coolant (CMR) and liquefied to give the liquefied natural gas (LNG). In the plant proposed, the first and second mixed coolants (WMR, CMR) are low in propane or free of propane, and the absorption liquid is formed from a further portion of the gas fraction which is condensed above the countercurrent absorption and returned to the countercurrent absorption without pumping. The present invention likewise provides a corresponding plant (100, 200).

Patent RU2017110052A3

ВУ” 2017110052`” АЗ Дата публикации: 15.02.2019 Форма № 18 ИЗИМ-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 2017110052/06(017712) 04.08.2015 РСТ/О$2015/043537 04.08.2015 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. 14/473,403 29.08.2014 05 Название изобретения (полезной модели): [Х] - как заявлено; [ ] - уточненное (см. Примечания) СДВОЕННАЯ СИСТЕМА СО СМЕШАННЫМ ХЛАДАГЕНТОМ Заявитель: БЛЭК ЭНД ВИТЧ ХОЛДИНГ КОМПАНИ, 05 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) Е25.] 1/00 (2006.01) 5. ОБЛАСТЬ ПОИСКА 5.1 Проверенный минимум документации РСТ (указывается индексами МПК) 825.7 1/00, 1/02, 3/00 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): Езрасепе, Раеагсв, КОРТО 6. ДОКУМЕНТЫ, ОТНОСЯЩИЕСЯ К ПРЕДМЕТУ ПОИСКА Кате- Наименование документа с указанием (где необходимо) частей, Относится к гория* относящихся к предмету поиска пункту формулы № 1 2 3 х $2 004003625 АТ (ЕЗСНЕК ВЕАТЕСЕ е а1 ...

Method and device for cooling fluid to low temperature

PROCESS FOR PRODUCING A LIQUEFIED NATURAL GAS CURRENT SUB-COOLED FROM A NATURAL GAS CHARGE CURRENT AND ASSOCIATED INSTALLATION

Natural Gas Liquefaction Process

根据本发明的天然气液化方法使用采用了混合制冷剂的单一制冷循环，且因此具有简单的构造和紧凑的、容易操作的系统。混合制冷剂被划分为两种制冷剂部分之后，该两种制冷剂部分没有被相互混合但是独立地经历冷凝(冷却)、膨胀、热交换和压缩的阶段，且因此，对每一种被划分的制冷剂部分适用最佳的温度和压力条件以提高液化方法的效率。

Heat exchanger with passage configuration and improved heat exchange structures

L’invention concerne un échangeur de chaleur (E1) à plaques (2) définissant entre elles une première série de passages (10) pour l’écoulement d’au moins un premier fluide frigorigène (F1) et un deuxième fluide frigorigène (F2) et étant divisé, suivant la direction longitudinale (z), en au moins une première portion (100) et une deuxième portion (200), une première structure d’échange thermique (S1) agencée dans la première portion (100) et comprenant au moins une série de premières parois de guidage de fluide (121, 122, 123) présentant des premiers bords d’attaque (124) s’étendant orthogonalement à la direction longitudinale (z) de façon à faire face, en tout ou partie, au premier fluide frigorigène (F1) lorsque celui-ci s’écoule dans la première portion (100), une deuxième structure d’échange thermique (S2) agencée dans la deuxième portion (200) et comprenant au moins une série de deuxièmes parois de guidage de fluide (221, 222, 223) présentant des deuxièmes bords d’attaque (224) s’étendant orthogonalement à la direction longitudinale (z) de façon à faire face, en tout ou partie, au deuxième fluide frigorigène (F2) lorsque celui-ci s’écoule dans la deuxième portion (200). Selon l’invention, la surface de section transversale (A2) des deuxièmes bords d’attaque (224) est supérieure à la surface de section transversale (A1) des premiers bords d’attaque (124), lesdites surfaces étant mesurées orthogonalement à la direction longitudinale (z) et par mètre de longueur d’échangeur.

METHOD AND SYSTEM FOR REFRIGERATING A FLUID TO BE COOLED AT LOW TEMPERATURE

L'INVENTION CONCERNE UN PROCEDE ET UN APPAREIL D'ECONOMIE D'ENERGIE DANS UNE METHODE DE LIQUEFACTION D'UN GAZ PAR EXEMPLE NATUREL 1 PAR UN CYCLE DE REFRIGERATION 2 AVEC LIQUEFACTION DU GAZ PAR REFROIDISSEMENT AU MOYEN DE LA VAPEUR PROVENANT DE LA VAPORISATION DU FLUIDE REFRIGERANT LIQUIDE SOUS-REFROIDI APRES DETENTE DE CELUI-CI A L'ETAT LIQUIDE, CETTE VAPEUR SERVANT SIMULTANEMENT A SOUS-REFROIDIR LE FLUIDE REFRIGERANT LIQUEFIE. L'INVENTION CONSISTE A EFFECTUER LA DETENTE DU FLUIDE REFRIGERANT LIQUIDE SOUS-REFROIDI A HAUTE PRESSION DANS UNE TURBINE HYDRAULIQUE CRYOGENIQUE 19 AVEC PRODUCTION D'UN TRAVAIL MECANIQUE EXTERIEUR EVENTUELLEMENT RECUPERE SUR L'ARBRE DE LA TURBINE POUR L'ENTRAINEMENT D'UNE MACHINE TOURNANTE 23. L'INVENTION EST APPLICABLE NOTAMMENT A LA LIQUEFACTION D'UN GAZ EN PARTICULIER NATUREL RICHE EN METHANE. THE INVENTION CONCERNS A PROCESS AND AN ENERGY-SAVING APPARATUS IN A METHOD OF LIQUEFACTION OF A GAS FOR EXAMPLE NATURAL 1 BY A REFRIGERATION CYCLE 2 WITH LIQUEFACTION OF THE GAS BY COOLING BY MEANS OF THE STEAM FROM THE VAPORIZATION OF THE UNDERCOOLED LIQUID REFRIGERANT FLUID AFTER RELAXATION OF THE LIQUID STATE, THIS VAPOR SIMULTANEOUSLY SERVING TO UNCOOLING THE LIQUEFIED REFRIGERANT FLUID. THE INVENTION CONSISTS OF CARRYING OUT THE RELAXATION OF THE UNDERCOOLED LIQUID REFRIGERANT AT HIGH PRESSURE IN A CRYOGENIC HYDRAULIC TURBINE 19 WITH PRODUCTION OF AN EXTERNAL MECHANICAL WORK POSSIBLE RECOVERED ON THE TURBINE SHAFT FOR DRIVING A TURBINE. 23. THE INVENTION IS APPLICABLE IN PARTICULAR TO THE LIQUEFACTION OF A PARTICULAR NATURAL GAS RICH IN METHANE.

NATURAL GAS LIQUEFACTION WITH NATURAL GAS RECYCLING

Procédé de liquéfaction de gaz naturel dans lequel le gaz naturel est refroidi, condensé et sous-refroidi par échange de chaleur indirect avec deux mélanges réfrigérants jusqu'à une température telle que le gaz naturel ne reste pas entièrement liquide sous pression après détente à pression atmosphérique. Le gaz naturel liquide sous pression est détendu pour former une phase gazeuse et une phase liquide. La phase gazeuse peut être soit comprimée et recyclée à l'entrée du procédé, soit servir de combustible. La phase liquide est détendue pour former une phase gazeuse et une phase liquide. La phase gazeuse est comprimée et recyclée à l'entrée du procédé. La phase liquide constitue le gaz naturel liquéfié produit. Natural gas liquefaction process in which natural gas is cooled, condensed and sub-cooled by indirect heat exchange with two refrigerant mixtures to a temperature such that natural gas does not remain entirely liquid under pressure after expansion to atmospheric pressure . The pressurized liquid natural gas is expanded to form a gas phase and a liquid phase. The gas phase can either be compressed and recycled at the inlet of the process, or be used as fuel. The liquid phase is expanded to form a gas phase and a liquid phase. The gas phase is compressed and recycled at the inlet of the process. The liquid phase constitutes the liquefied natural gas produced.

Heat exchanger with passage configuration and improved heat exchange structures

L’invention concerne un échangeur de chaleur (E1) à plaques (2) définissant entre elles une première série de passages (10) pour l’écoulement d’au moins un premier fluide frigorigène (F1) et un deuxième fluide frigorigène (F2) et étant divisé, suivant la direction longitudinale (z), en au moins une première portion (100) et une deuxième portion (200), une première structure d’échange thermique (S1) agencée dans la première portion (100) et comprenant au moins une série de premières parois de guidage de fluide (121, 122, 123) présentant des premiers bords d’attaque (124) s’étendant orthogonalement à la direction longitudinale (z) de façon à faire face, en tout ou partie, au premier fluide frigorigène (F1) lorsque celui-ci s’écoule dans la première portion (100), une deuxième structure d’échange thermique (S2) agencée dans la deuxième portion (200) et comprenant au moins une série de deuxièmes parois de guidage de fluide (221, 222, 223) présentant des deuxièmes bords d’attaque (224) s’étendant orthogonalement à la direction longitudinale (z) de façon à faire face, en tout ou partie, au deuxième fluide frigorigène (F2) lorsque celui-ci s’écoule dans la deuxième portion (200). Selon l’invention, la surface de section transversale (A2) des deuxièmes bords d’attaque (224) est supérieure à la surface de section transversale (A1) des premiers bords d’attaque (124), lesdites surfaces étant mesurées orthogonalement à la direction longitudinale (z) et par mètre de longueur d’échangeur. The invention relates to a heat exchanger (E1) with plates (2) defining between them a first series of passages (10) for the flow of at least a first refrigerant (F1) and a second refrigerant (F2). and being divided, along the longitudinal direction (z), into at least a first portion (100) and a second portion (200), a first heat exchange structure (S1) arranged in the first portion (100) and comprising at least at least one series of first fluid guide walls (121, 122, 123) having first leading ...

METHOD AND DEVICE FOR LIQUEFACTION OF A NATURAL GAS WITHOUT SEPARATION OF PHASES ON THE REFRIGERANT MIXTURES

A method allowing a gaseous mixture such as a natural gas to be liquefied by using a first compressed coolant mixture M1, at least partially condensed by cooling with the aid of an external coolant fluid, then subcooled, expanded, and vaporized, and a second compressed coolant mixture, cooled with the aid of an external coolant fluid, then cooled by heat exchange with the first coolant mixture M1 during the first cooling stage (I), after which it is in an at least partially condensed state. The second partially condensed coolant mixture is sent without phase separation to a second cooling stage (II) where it is fully condensed, expanded, and vaporized at at least two pressure levels. The subcooled natural gas is expanded to form the LNG produced.

Equipment for cooling down hydrocarbon stream

本实用新型涉及一种用于冷却烃流的设备。一种通过使用混合冷却系统和方法来提高天然气液化过程的效率的系统和方法。更具体地说，一种用于将跨临界预冷制冷过程转换成亚临界过程的系统和方法。一个实施方案中，使用节能器将制冷剂冷却到亚临界温度。在另一实施方案中，使用辅助热交换器将制冷剂冷却到亚临界温度。任选地，节能器或辅助热交换器当环境温度足够低以将制冷剂冷却到亚临界温度时可以被旁路。在另一实施方案中，制冷剂是等熵膨胀的。

METHOD AND SYSTEM FOR COOLING A LOW TEMPERATURE COOLING FLUID

A process of and an apparatus for saving energy in a method of liquefying a natural gas by cooling same with the vapor from a liquid coolant sub-cooled after expansion thereof in the liquid condition, the vapor simultaneously sub-cooling the liquefied coolant, the process consisting in expanding the sub-cooled high-pressure liquid coolant in a hydraulic turbine providing mechanical power possibly for driving a rotary machine.

Natural gas liquefaction process with improved circulation of a mixed refrigerant stream

L’invention concerne un procédé de liquéfaction d’un courant d’hydrocarbures (102) tel que le gaz naturel mettant en œuvre un échangeur de chaleur (E2) à plaques (2) présentant une longueur mesurée suivant la direction longitudinale (z), les plaques (2) définissant entre elles au moins une première série de passages (10) pour l’écoulement d’au moins une partie d’un courant réfrigérant diphasique (203) se vaporisant contre le courant d’hydrocarbures (102), ledit procédé comprenant notamment les étapes : introduction d’un courant réfrigérant (202) dans l’échangeur (E2) qui s’écoule dans un sens descendant, sortie du courant réfrigérant (201 de l’échangeur (E2) et détente de sorte à produire un courant réfrigérant diphasique (203),réintroduction d’au moins une partie du courant réfrigérant diphasique (203) dans l’échangeur (E2) qui s’écoule dans les passages (10) dans un sens ascendant, vaporisation au moins partiellement de ladite au moins une partie de courant réfrigérant diphasique (203) contre le courant d’hydrocarbures (102) de façon à obtenir un courant d’hydrocarbures au moins partiellement liquéfié (220). Selon l’invention, au moins un passage (10) comprend une structure d’échange thermique (S) comprenant plusieurs séries de parois de guidage de fluide se succédant suivant la direction longitudinale (z) et présentant des bords d’attaque qui s’étendent orthogonalement à la direction longitudinale (z) de façon à faire face, en tout ou partie, au courant réfrigérant diphasique (203), et ayant une surface de section transversale (A) de bords d’attaque, mesurée orthogonalement à la direction longitudinale (z) et exprimée par mètre de longueur d’échangeur, décroissante suivant la direction longitudinale (z).

METHOD FOR PREVENTING INSTANT EVAPORATION OF LIQUEFIED NATURAL GAS DURING TRANSPORT.

Procédé pour éliminer l'évaporation d'un courant de gaz naturel liquéfié (26) lors du transfert de celui-ci dans une installation de stockage comprenant les étapes suivantes : Etape a) : liquéfaction, au moyen d'un cycle de réfrigération (7), d'un courant de gaz naturel (1) et d'un courant d'azote (8) dans un échangeur de chaleur principal (2); Etape b) : refroidissement du courant de gaz naturel liquéfié (6) issu de l'étape a) dans un second échangeur (15) de chaleur par circulation dudit courant de gaz naturel liquéfié (6) à contre courant d'un flux d'azote liquide (14) qui se vaporise en refroidissant ledit courant de gaz naturel liquéfié ; caractérisé en ce que le flux d'azote liquide (14) mis en œuvre à l'étape b) est issu de l'étape a). A method for removing evaporation from a stream of liquefied natural gas (26) upon transfer thereof to a storage facility comprising the following steps: Step a): liquefaction, by means of a refrigeration cycle (7) ), a stream of natural gas (1) and a stream of nitrogen (8) in a main heat exchanger (2); Step b): cooling the stream of liquefied natural gas (6) from step a) in a second heat exchanger (15) by circulating said stream of liquefied natural gas (6) against the flow of a stream of liquid nitrogen (14) which vaporizes on cooling said stream of liquefied natural gas; characterized in that the flow of liquid nitrogen (14) implemented in step b) is derived from step a).

Natural gas liquefaction process with improved circulation of a mixed refrigerant stream

L’invention concerne un procédé de liquéfaction d’un courant d’hydrocarbures (102) tel que le gaz naturel mettant en œuvre un échangeur de chaleur (E2) à plaques (2) présentant une longueur mesurée suivant la direction longitudinale (z), les plaques (2) définissant entre elles au moins une première série de passages (10) pour l’écoulement d’au moins une partie d’un courant réfrigérant diphasique (203) se vaporisant contre le courant d’hydrocarbures (102), ledit procédé comprenant notamment les étapes : introduction d’un courant réfrigérant (202) dans l’échangeur (E2) qui s’écoule dans un sens descendant, sortie du courant réfrigérant (201 de l’échangeur (E2) et détente de sorte à produire un courant réfrigérant diphasique (203),réintroduction d’au moins une partie du courant réfrigérant diphasique (203) dans l’échangeur (E2) qui s’écoule dans les passages (10) dans un sens ascendant, vaporisation au moins partiellement de ladite au moins une partie de courant réfrigérant diphasique (203) contre le courant d’hydrocarbures (102) de façon à obtenir un courant d’hydrocarbures au moins partiellement liquéfié (220). Selon l’invention, au moins un passage (10) comprend une structure d’échange thermique (S) comprenant plusieurs séries de parois de guidage de fluide se succédant suivant la direction longitudinale (z) et présentant des bords d’attaque qui s’étendent orthogonalement à la direction longitudinale (z) de façon à faire face, en tout ou partie, au courant réfrigérant diphasique (203), et ayant une surface de section transversale (A) de bords d’attaque, mesurée orthogonalement à la direction longitudinale (z) et exprimée par mètre de longueur d’échangeur, décroissante suivant la direction longitudinale (z). The invention relates to a method for liquefying a stream of hydrocarbons (102) such as natural gas using a plate heat exchanger (E2) having a length measured in the longitudinal direction (z), the plates (2) defining between them at least a first series of ...

Natural gas liquefaction

A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled, expanded to an intermediate pressure, and supplied to a distillation column. The bottom product from this distillation column preferentially contains the majority of any hydrocarbons heavier than methane that would otherwise reduce the purity of the liquefied natural gas. The residual gas stream from the distillation column is compressed to a higher intermediate pressure, cooled under pressure to condense it, and then expanded to low pressure to form the liquefied natural gas stream.

Natural gas liquefaction

A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled, expanded to an intermediate pressure, and supplied to a distillation column. The bottom product from this distillation column preferentially contains the majority of any hydrocarbons heavier than methane that would otherwise reduce the purity of the liquefied natural gas. The residual gas stream from the distillation column is compressed to a higher intermediate pressure, cooled under pressure to condense it, and then expanded to low pressure to form the liquefied natural gas stream.

Improved method and system for cooling a hydrocarbon stream

A system and method for increasing the efficiency of natural gas liquefaction processes by using a hybrid cooling system and method. More specifically, a system and method for converting a transcritical precooling refrigeration process to a subcritical process. In one embodiment, the refrigerant is cooled to sub-critical temperature using an economizer. In another embodiment, the refrigerant is cooled to a sub-critical temperature using an auxiliary heat exchanger. Optionally, the economizer or auxiliary heat exchanger can be bypassed when ambient temperatures are sufficiently low to cool the refrigerant to a sub-critical temperature. In another embodiment, the refrigerant is isentropically expanded.

METHOD AND INSTALLATION FOR THE SIMULTANEOUS PRODUCTION OF A LIQUEFICATED NATURAL GAS AND A CUTTING OF NATURAL GAS LIQUIDS

Ce procédé comprend les étapes suivantes :(a) on introduit le gaz naturel de départ (101) dans une première colonne de distillation (31) qui produit en tête un gaz naturel pré-traité (111), lequel gaz naturel pré-traité (111) ne contient pratiquement plus d'hydrocarbures en C6+;(b) on introduit le gaz naturel pré-traité (111) dans une unité (19) de récupération des LGN comprenant au moins une deuxième colonne de distillation (49), de façon à produire, d'une part, en tête de colonne, un gaz naturel purifié (151), et d'autre part, une coupe de LGN (15) ; et(c) on forme ledit gaz naturel apte à être liquéfié (161) à partir du gaz naturel purifié (151) issu de l'étape (b) .

Self cooling heat exchanger with channels having an expansion device

An inexpensive heat exchanger is disclosed, wherein the heat exchanger is made up of a plurality of plates and each plate has at least one channel defined in the plate. The plates are stacked and bonded together to form a block having conduits for carrying at least one fluid and where the exchanger includes an expansion device enclosed within the unit.

Natural gas liquefaction

A process for liquefying natural gas in conjunction with producing a liquid stream containing predominantly hydrocarbons heavier than methane is disclosed. In the process, the natural gas stream to be liquefied is partially cooled and divided into first and second streams. The first stream is further cooled to condense substantially all of it, expanded to an intermediate pressure, and then supplied to a distillation column at a first mid-column feed position. The second stream is also expanded to intermediate pressure and is then supplied to the column at a second lower mid-column feed position. A distillation stream is withdrawn from the column below the feed point of the second stream and is cooled to condense at least a part of it, forming a reflux stream. At least a portion of the reflux stream is directed to the distillation column as its top feed.

Method for liquefying a flow rich in hydrocarbons

The invention relates to a process for liquefying a hydrocarbon-rich stream, in particular a natural gas stream, by indirect heat exchange with the refrigerant mixture of a refrigerant mixture cycle, the refrigerant mixture being compressed in two stages or multiple stages and where the refrigerant mixture is fractionated into at least one lower-boiling refrigerant mixture fraction and into at least one higher-boiling refrigerant mixture fraction. According to the invention, the compressed refrigerant mixture (23) is at least partially condensed (E4) downstream of the penultimate compressor stage and is fractionated (D4) into a higher-boiling liquid fraction (26) and a lower-boiling gas fraction (24). The lower--boiling gas fraction (24) is compressed to the final pressure, partially condensed (E5) and fractionated (D5) into a lower-boiling gas fraction (10) and a higher-boiling liquid fraction (27). The higher-boiling liquid fraction (27) is added to the partially condensed refrigerant mixture stream (23), and the gas fraction (10) forms the lower-boiling refrigerant mixture fraction and the liquid fraction (26) forms the higher-boiling refrigerant mixture fraction of the refrigerant mixture cycle. Alternatively to this, the compressed refrigerant mixture (20, 31, 34) can be partially condensed (E3, E4, E5) after each compressor stage and fractionated in each case into a lower--boiling gas fraction (21, 32, 10) and a higher-boiling liquid fraction (30, 33, 35). Only the gas fraction (21, 32) from the partial condensation (E3, E4) in each case is further compressed and the liquid fractions 33, 35) from the second fractionation (D4, D5) on are added to the partially condensed stream (20) from the first compressor stage upstream of its fractionation (D3). Again, the gas fraction (10) from the final fractionation (D5) forms the lower-boiling refrigerant mixture fraction and the liquid fraction (30) from the first fractionation (D3) forms the higher-boiling refrigerant ...

Method and apparatus for cooling a hydrocarbon stream

apparatus and method for liquefying natural gas and ship comprising the same

一种用于使天然气液化的设备(600)，包括：‑第一离心式压缩机(605)，‑分馏装置(110)，‑第二离心式压缩机(610)，‑第一热交换主体(115)，‑第二热交换主体(120)，和‑导向第一压缩机的返回管道(125)，‑第三热交换主体(420)，位于第一交换主体的天然气入口(116)的上游，‑第三离心式压缩机(620)，第一和第三离心式压缩机由单个共同的涡轮机(630)驱动，‑第一压缩机和第三压缩机共同的壳体(635)，‑装置(430)，和‑导向第三交换主体的转移管道(435)。

Self cooling heat exchanger

An inexpensive heat exchanger is disclosed, wherein the heat exchanger is made up of a plurality of plates and each plate has at least one channel defined in the plate. The plates are stacked and bonded together to form a block having conduits for carrying at least one fluid and where the exchanger includes an expansion device enclosed within the unit.