СПОСОБ УПРАВЛЕНИЯ ПРИ ОСТАНОВКЕ ТУРБОМАШИННОЙ ТЕХНОЛОГИЧЕСКОЙ ЛИНИИ В УСТАНОВКЕ ДЛЯ СЖИЖЕНИЯ ГАЗООБРАЗНОГО ПРОДУКТА

FIELD: turbines or turbomachines. SUBSTANCE: disclosed is control method at stopping of turbomachine process line (2) installed in apparatus (8) for liquefaction of gaseous product, comprising at least two turbomachine processing lines (2, 2'). Proposed method comprises the following stages: detection of stop of first turbomachine process line (2'), immediate increase of driving torque on shaft (3) of second turbomachine process line (2) upon detection of stop, maintenance of increase of driving torque on shaft (3) of second turbomachine process line (2) until the preset speed of motor drive (6, 7) is reached or the preset period of time expires. EFFECT: disclosed is control method at stopping of turbomachine process line in liquefaction plant of gaseous product. 14 cl, 2 dwg

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 УПРАВЛЕНИЯ ПРИ ОСТАНОВКЕ ТУРБОМАШИННОЙ ТЕХНОЛОГИЧЕСКОЙ ЛИНИИ В УСТАНОВКЕ ДЛЯ СЖИЖЕНИЯ ГАЗООБРАЗНОГО ПРОДУКТА

УСОВЕРШЕНСТВОВАННЫЕ СПОСОБ И СИСТЕМА ДЛЯ ОХЛАЖДЕНИЯ УГЛЕВОДОРОДНОГО ПОТОКА

СПОСОБ СЖИЖЕНИЯ ПРИРОДНОГО ГАЗА И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

Способ и устройство для сжижения природного газа, имеющего избыточное давление выше 56,2 кгс/см, в которых природный газ вводят в детандер, который действует для снижения давления природного газа и извлечения работы от расширения природного газа в процессе снижения давления так, что полученный вытекающий из детандера поток может быть охлажден до последовательно более низких температур путем пропускания газа через множество охлаждающих этапов за счет косвенного теплообмена с по крайней мере одним хладагентом до тех пор, пока газ, по существу, полностью сконденсируется в последнем охлаждающем этапе.

Liquefaction of gases

... 974,542. Liquefaction of gases.. PETROCARBON DEVELOPMENTS Ltd. Dec. 4, 1962, No. 45789/62. Addition to 912,478. Heading F4P. The method of cooling a compressed gas stream to below 70‹ K. in a plurality of inclined heat exchangers in series traversed by a separate stream of the gas after expansion in a turbine as claimed in the parent Specification, is modified in that helium is used as the coolant gas. Hydrogen is liquefied by passing it at 10 atmospheres pressure through an ammoniacooled exchanger 53, a nitrogen-cooled exchanger 53, a nitrogen-cooled exchanger 54 where its. temperature is reduced to 70‹ K. and further cooling is effected in exchangers 55, 56, 57 in series and wet hydrogen at 22‹ K. is expanded at a valve 58 into a container 59; each of the exchangers 55, 56, 57 being cooled by a countercurrent flow of helium cooled by expansion at an associated turbine 55b, 56b, 57b at a pressure of 7 atmospheres. The helium circuits are fed in parallel from a common discharge line of ...

Process components, containers, and pipes suitablefor containing and transporting cryogenic tempera ture fluids.

HYBRID CYCLE FOR THE PRODUCTION OF LIQUID NATURAL GAS

PROZESSKOMPONENTEN, BEHÄLTER UND ROHRE, GEEIGNET ZUM AUFNEHMEN UND TRANSPORTIEREN VON FLUIDEN KRYOGENER TEMPERATUR

HYBRID CYCLE FOR THE LIQUEFACTION OF NATURAL GAS

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.

PROCESS FOR COOLING A PRODUCT IN A HEAT EXCHANGER EMPLOYING MICROCHANNELS

Liquefaction of natural gas

Systems and a method for the formation of a liquefied natural gas (LNG) are disclosed herein. The system includes a first fluorocarbon refrigeration system configured to chill a natural gas using a first fluorocarbon refrigerant and a second fluorocarbon refrigeration system configured to further chill the natural gas using a second fluorocarbon refrigerant. The system also includes a nitrogen refrigeration system configured to cool the natural gas using a nitrogen refrigerant to produce LNG and a nitrogen rejection unit configured to remove nitrogen from the LNG. As an alternative embodiment, the nitrogen refrigeration system can be replaced by a methane autorefrigeration system.

System for combined cycle mechanical drive in cryogenic liquefaction processes

Core-in-shell heat exchangers for multistage compressors

LIQUEFACTION OF NATURAL GAS

SYSTEM AND METHOD FOR LIQUID AIR PRODUCTION, POWER STORAGE AND POWER RELEASE

Systems and methods for storing and releasing energy comprising directing inlet air into a vertical cold flue assembly, a portion of moisture being removed from the air within the cold flue assembly. The air is directed out of the cold flue assembly and compressed. The remaining moisture is substantially removed and the carbon dioxide is removed from the air by adsorption. The air is cooled in a main heat exchanger such that it is substantially liquefied using refrigerant loop air. The substantially liquefied air is directed to a storage apparatus. The refrigerant loop air is cooled by a mechanical chiller and by a plurality of refrigerant loop air expanders. In energy release mode, working loop fluid warms the released liquid air such that the released liquid air is substantially vaporized, and the released liquid air cools the working loop fluid such that the working loop fluid is substantially liquefied. A portion of the released liquid air is directed to the at least one generator and used as bearing air for the at least one generator. The substantially vaporized air is directed to a combustion chamber and combusted with a fuel stream. Combustion gas may be directed from the combustion chamber to at least one expander and expanded in the expander, the expanded combustion gas split into a first portion and a second portion, the first portion being relatively larger than the second portion. The first portion may be directed to a first heat exchanger, and the second portion may be directed to a second heat exchanger such that the second portion heats and substantially vaporizes the released liquid air.

CORE-IN-SHELL HEAT EXCHANGERS FOR MULTISTAGE COMPRESSORS

In multistage refrigeration compression (10), where liquid refrigerant withdraw from a core-in-shell type heat exchanger (40) connected to a high compression stage (16) is passed to a similar exchanger (70) connected to a lower compression stage (14), liquid level stability in the higher compression stage exchanger (40) is improved by providing an enlarged surge volume. A baffle plate (50) transversing a lower portion of the shell divides the shell into a cooling zone that contains the cores, and a discharge zone that is part of the surge volume. The height of the baffle is selected to facilitate maintenance of at least a minimum functional liquid level in the shell. Liquid refrigerant withdrawn from the discharge zone of the high-stage shell is supplied to the cooling zone of a shell connected to a lower compression stage. The liquid level in the shell is maintained by manipulating flow to liquid refrigerant that is flashed into the cooling zone of the higher compression stage shell.

Plant for taking up and transporting a fluid of cryogenic temperature.

ПОЛУЗАКРЫТЫЙ СПОСОБ ПОЛУЧЕНИЯ СПГ

Полузакрытая система для получения сжиженного природного газа (СПГ), которая включает определенные преимущества закрытых систем и определенные преимущества открытых систем для создания более эффективной и действенной гибридной системы. В полузакрытой системе конечный метановый холодильный цикл обеспечивает значительное охлаждение потока природного газа посредством непрямого теплопереноса, в противоположность расширительному охлаждению. Малая часть продукта СПГ из цикла охлаждения метана используется в качестве восполняющего холодильного агента в цикле охлаждения метана. Находящаяся под давлением часть холодильного агента из цикла охлаждения метана используется в качестве топливного газа. Избыток холодильного агента из цикла охлаждения метана может повторно объединяться с потоком переработанного природного газа, вместо выжигания.

Process Components, Containers and Pipes Suitable For Containing and Transporting Cryogenic Temperature Fluids

Process to cool and liquify a normally gas mixture of substances

Method and apparatus for liquefaction of natural gas

A process and apparatus for liquefying a natural gas, having a pressure above about 800 psig, in which the natural gas is introduced into an expander which operates to reduce the pressure of the natural gas and extract work from the expansion of the natural gas during the pressure reduction so that the resulting effluent from the expander can be cooled to sequentially lower temperatures by passing the gas through a plurality of cooling stages, in indirect heat exchange with at least one refrigerant, until the gas is substantially completely condensed in the last of the cooling stages.

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.

LIQUEFACTION OF NATURAL GAS

... 1373124 Liquefying gases SHELL INTERNATIONALE RESEARCH MAATSCHAPPLJ NV 13 Dec 1971 57766/71 Heading F4P A liquefaction plant for natural gas supplied at high pressure, e.g. direct from the well, comprises a pair of coolers 12, 16 and separators 14, 18 to remove the heavy fractions which are fed via reducing valves 22, 24 to a distillation column 20, the gas stream 27 issuing therefrom being fed in parallel with the main gas stream 26 through a series of heat exchangers 28 in which both streams are liquefied, the main stream being fed through a pressure reducing device 30 prior to mixing with the stream 27. The gas enters the plant at approx. 50 atmos., cooler 12 reducing the temperature to between - 10‹ C. and - 35‹C. The valves 22, 24 reduce the pressure to about 35 atmos. to ensure sufficient difference between liquid and vapour densities in the distillation column 20, and the stream 27 issues at - 70‹ C. and 35 atmos. whilst main stream 26 issues from separator 18 at - 70‹ C. and 45- ...

A process for cooling and liquefying gases

... 896,663. Liquefaction of gases. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. Oct. 21, 1960 [Oct. 23, 1959], No. 36196/60. Class 8(2). Liquefaction of a gas mixture e.g., natural hydrocarbon gas is effected by heat exchange cooling in at least two stages in series; the coolant in at least the last stage being wholly in the gas phase and that in the immediately preceding stage being an evaporating coolant. In operation the gas mixture is forced by a compressor 1 at 50 atmospheres pressure firstly through a water cooler 2, secondly through exchangers 3-6 traversed by liquid ethane which comprises the evaporating coolant, and finally the so-liquefied mixture is sub-cooled in an exchanger 7 cooled by a closed nitrogen cycle and after expansion to atmospheric pressure at a valve 8 is stored in a vessel 9. Cold vapour from the vessel 9 passes through exchangers 25, 24 and cools nitrogen gas discharged by a compressor 22 prior to its expansion in a turbine 26 the discharge of which traverses ...

HYBRID CYCLE FOR THE LIQUEFACTION OF NATURAL GAS

LIQUEFACTION OF NATURAL GAS

Process and apparatus for sweetening and liquefying a gas stream

A process and apparatus for liquefying a gas stream comprising hydrocarbons and sour species is provided in which the sour species are removed in liquefied form as the sweetened gas stream is progressively cooled to liquefaction temperatures. The process involves cooling the gas stream in a manner to produce a cooled gas stream comprising gaseous hydrocarbons and residual sour species. The cooled gas stream is then treated with a cold solvent to deplete the cooled gas stream of residual sour species. The resulting cooled sweetened gas stream is then further cooled to produce liquid hydrocarbons.

Managing make-up gas composition variation for a high pressure expander process

A method for liquefying a feed gas stream. A refrigerant stream is cooled and expanded to produce an expanded, cooled refrigerant stream. Part or all of the expanded, cooled refrigerant stream is mixed with a make-up refrigerant stream in a separator, thereby condensing heavy hydrocarbon components from the make-up refrigerant stream and forming a gaseous expanded, cooled refrigerant stream. The gaseous expanded, cooled refrigerant stream passes through a heat exchanger zone to form a warm refrigerant stream. The feed gas stream is passed through the heat exchanger zone to cool at least part of the feed gas stream by indirect heat exchange with the expanded, cooled refrigerant stream, thereby forming a liquefied gas stream. The warm refrigerant stream is compressed to produce the compressed refrigerant stream.

System and method for liquid air production, power storage and power release

Systems and methods for storing and releasing energy comprising directing inlet air into a vertical cold flue assembly, a portion of moisture being removed from the air within the cold flue assembly. The air is directed out of the cold flue assembly and compressed. The remaining moisture is substantially removed and the carbon dioxide is removed from the air by adsorption. The air is cooled in a main heat exchanger such that it is substantially liquefied using refrigerant loop air. The substantially liquefied air is directed to a storage apparatus. The refrigerant loop air is cooled by a mechanical chiller and by a plurality of refrigerant loop air expanders. In energy release mode, working loop fluid warms the released liquid air such that the released liquid air is substantially vaporized, and the released liquid air cools the working loop fluid such that the working loop fluid is substantially liquefied. A portion of the released liquid air is directed to the at least one generator and ...

Method for handling the shutdown of a turbomachine string in a liquefaction plant of a gaseous product

A method for handling the shutdown of a turbomachine string (2) installed in a plant (8) for the liquefaction of a gaseous product comprising at least two turbomachine strings (2, 2') comprises the steps of detecting the shutdown of a first turbomachine string (2'); promptly increasing the driving torque on a shaft (3) of a second turbomachine string (2) when the shutdown is detected; maintaining the driving torque increase on the shaft (3) of the second turbomachine string (2) until a preset speed of the motor driver (6, 7) is reached or a predetermined period of time expires.

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).

INTEGRALLY-GEARED COMPRESSORS FOR PRECOOLING IN LNG APPLICATIONS

A natural gas liquefaction system is disclosed, which comprises at least a pre-cooling loop (103), through which a first refrigerant is adapted to circulate. The pre-cooling loop comprises at least one compressor (109) for pressurizing the first refrigerant; at least one prime mover (111) for driving the compressor (109); at least one condenser (115) for removing heat from the first refrigerant; at least a first expansion element (119A-119D) for expanding the first refrigerant; at least a first heat exchanger (123A-123D) for transferring heat from natural gas to the first refrigerant. The system further comprises at least a cooling loop (105), downstream of the pre-cooling loop, where through a second refrigerant circulates. The natural gas is adapted to be sequentially cooled in the pre-cooling loop and in the cooling loop. The compressor of the pre-cooling loop is an integrally-geared turbo-compressor comprising a plurality of compressor stages (109A-109D).

Method and Apparatus for Liquefaction of Natural Gas

УСТАНОВКА И СПОСОБ ОБЪЕДИНЕННОГО ИЗВЛЕЧЕНИЯ ПРИРОДНОГО ГАЗОКОНДЕНСАТА И СЖИЖЕНИЯ ПРИРОДНОГО ГАЗА

Предложенные установки включают часть для извлечения конденсата природного газа и часть для сжижения природного газа, причем часть для извлечения конденсата природного газа обеспечивает продукт верхнего погона с низкой температурой и высоким давлением непосредственно в часть для сжижения природного газа. Охлаждение и конденсация подаваемого газа наиболее предпочтительно осуществляются с использованием холодильных циклов, которые используют другие холодильные агенты, чем продукт верхнего погона деметанизатора/абсорбера. Таким образом, холодный продукт верхнего погона деметанизатора/абсорбера сжимается посредством расширения в турбодетандере и подается в часть для сжижения при значительно более низкой температуре без расхода чистой энергии для сжатия.

ПОЛУЗАКРЫТЫЙ СПОСОБ ПОЛУЧЕНИЯ СЖИЖЕННОГО ПРИРОДНОГО ГАЗА

Полузакрытая система для получения сжиженного природного газа (СПГ), которая включает определенные преимущества закрытых систем и определенные преимущества открытых систем для создания более эффективной и действенной гибридной системы. В полузакрытой системе конечный метановый холодильный цикл обеспечивает значительное охлаждение потока природного газа посредством непрямого теплопереноса в противоположность расширительному охлаждению. Малая часть продукта СПГ из цикла охлаждения метана используется в качестве восполняющего холодильного агента в цикле охлаждения метана. Находящаяся под давлением часть холодильного агента из цикла охлаждения метана используется в качестве топливного газа. Избыток холодильного агента из цикла охлаждения метана может повторно объединяться с потоком переработанного природного газа вместо выжигания.

УСТАНОВКИ И СПОСОБЫ ОБЪЕДИНЕННОГО ИЗВЛЕЧЕНИЯ ПРИРОДНОГО ГАЗОКОНДЕНСАТА И СЖИЖЕНИЯ СЖИЖЕННОГО ПРИРОДНОГО ГАЗА

Рассматриваемые установки включают часть для извлечения ПГК и часть для сжижения СПГ, причем часть для извлечения ПГК обеспечивает продукт верхнего погона с низкой температурой и высоким давлением непосредственно в часть для сжижения СПГ. Охлаждение и конденсация подаваемого газа наиболее предпочтительно осуществляются с использованием холодильных циклов, которые используют другие холодильные агенты, чем продукт верхнего погона деметанизатора/абсорбера. Таким образом, холодный продукт верхнего погона деметанизатора/абсорбера сжимается посредством расширения в турбодетандере и подается в часть для сжижения при значительно более низкой температуре без расхода чистой энергии для сжатия.

СКЛАДОВИЙ ПРОЦЕС, ЄМНОСТІ ТА ТРУБНА КОЛОНА ДЛЯ ЗБЕРІГАННЯ І ТРАНСПОРТУВАННЯ КРІОГЕННОЇ РІДИНИ ВИЗНАЧЕНОЇ ТЕМПЕРАТУРИ

Запропоновано елементи технологічного процесу, контейнери і труби, що виконані з надвисокоміцних низьколегованих сталей, що містять менше 9 ваг. %. нікелю і які мають міцність на розрив понад 830 МПа (120 кг на квадратний дюйм) і температури в’язкокрихкого переходу (DBTT) нижче приблизно -73°С (-100°F).

System and method for liquid air production, power storage and power release

Systems and methods for storing and releasing energy comprising directing inlet air into a vertical cold flue assembly, a portion of moisture being removed from the air within the cold flue assembly. The air is directed out of the cold flue assembly and compressed. The remaining moisture is substantially removed and the carbon dioxide is removed from the air by adsorption. The air is cooled in a main heat exchanger such that it is substantially liquefied using refrigerant loop air. The substantially liquefied air is directed to a storage apparatus. The refrigerant loop air is cooled by a mechanical chiller and by a plurality of refrigerant loop air expanders. In energy release mode, working loop fluid warms the released liquid air such that the released liquid air is substantially vaporized, and the released liquid air cools the working loop fluid such that the working loop fluid is substantially liquefied. A portion of the released liquid air is directed to the at least one generator and ...

Hybrid cycle for production of liquefied natural gas

Patent RU2018110620A3

`”ВУ“” 2018110620°`” АЗ Дата публикации: 18.09.2020 Форма № 18 ИЗ,ПМ-2011 Федеральная служба по интеллектуальной собственности Федеральное государственное бюджетное учреждение 5 «Федеральный институт промышленной собственности» (ФИПС) ОТЧЕТ О ПОИСКЕ 1. . ИДЕНТИФИКАЦИЯ ЗАЯВКИ Регистрационный номер Дата подачи 2018110620/12(016434) 26.03.2018 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. 15/472,701 29.03.2017 05 Название изобретения (полезной модели): [Х] - как заявлено; [ ] - уточненное (см. Примечания) ПАРАЛЛЕЛЬНОЕ СЖАТИЕ НА УСТАНОВКАХ СПГ С ИСПОЛЬЗОВАНИЕМ ДВУХПОТОЧНОГО КОМПРЕССОРА 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: [ ] 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) Е257 1/00 - Е251 5/00, НО4О 25/00 - ЕО4О 25/16, Е25В 1/00 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, Соозе, Раеагсь, КОРТО 6. ДОКУМЕНТЫ, ОТНОСЯЩИЕСЯ К ПРЕДМЕТУ ПОИСКА Кате- Наименование документа с указанием (где необходимо) частей, Относится к гория* относящихся к предмету поиска ...

СПОСОБ ОХЛАЖДЕНИЯ УГЛЕВОДОРОДНОГО СЫРЬЕВОГО ПОТОКА И УСТАНОВКА ДЛЯ ОХЛАЖДЕНИЯ УГЛЕВОДОРОДНОГО СЫРЬЕВОГО ПОТОКА ОХЛАЖДЕНИЯ УГЛЕВОДОРОДНОГО ПОТОКА

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 ...

СПОСОБ И УСТРОЙСТВО ДЛЯ СЖИЖЕНИЯ ПРИРОДНОГО ГАЗА

FIELD: gas liquefaction. SUBSTANCE: process and device are related to liquefaction of natural gas having positive pressure above 56.2 kgf/sq.cm (atm). Natural gas is injected into gas-expansion machine to reduce its pressure and to recover work from expansion of natural gas in process of pressure reduction so that flow going out of gas-expansion machine can be cooled in sequence to lower temperature by its passage through number of cooling stages thanks to indirect heat exchange with at least one cooling agent till gas is completely condensed in substance in last cooling stage. EFFECT: design of more economic and efficient equipment to produce liquefied natural gas. 10 cl, 1 dwg БбУЭУУГС ПЧ ГЭ (19) 13) ВИ "” 2144 649 ' 5 МК’ [ 25 4 4/00 СЛ РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 95107192/06, 28.04.1995 (71) Заявитель: Филлипс Петролеум Компани (Ц$) (24) Дата начала действия патента: 28.04.1995 (72) Изобретатель: Вилльям Р.Лау (ЦЗ) (30) Приоритет: 29.04.1994 Ц$ 08/235,775 (73) Патентообладатель: (46) Дата публикации: 20.01.2000 Филлипс Петролеум Компани (ЦЗ) (56) Ссылки: ЗИ 423990 А, 11.09.74. ЗЦ 1355138 АЗ, 23.11.87. СВ 1515326 А, 21.05.18. 4$ 3828564 А, 13.08.74. ОЕ 2319803 В.2, 07.01.82. (98) Адрес для переписки: 129010, Москва, ул.Б.Спасская, д.25, строение 3, ООО "Городисский и Партнеры", патентному поверенному Томской Е.В. (54) СПОСОБ И УСТРОЙСТВО ДЛЯ СЖИЖЕНИЯ ПРИРОДНОГО ГАЗА (57) Реферат: заключается в создании более экономичного Способ и устройство для сжижения и эффективного оборудования для природного газа, имеющего избыточное производства сжиженного природного газа. 2 давление выше чем около 56,2 кгс/см? (атм), с. и 8 з.п.ф-лы, 1 ил. в которых природный газ вводят в детандер, с уе который действует для снижения давления х природного газа и извлечения работы от ‚в ва расширения природного газа в процессе снижения давления таким образом, что полученный вытекающий из ...

Process for the liquefaction of a gas

... 942,807. Liquefaction of gases. AIR LIQUIDE S.A. POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE. May 3, 1960 [May 15, 1959], No. 15574/60. Heading F4P. Liquefaction of a gas e.g. natural methane prior to storage at low pressure in a reservoir 39 is effected by cooling highly compressed natural methane in heat exchangers 2, 6 traversed by counterflowing liquid propane, admitted through ducts 3, 7 and exhausted through ducts 4, 8, further cooling in exchangers 14, 18 traversed by counterflowing liquid ethylene admitted through ducts 15, 19 and exhausted through duets 16, 20 and finally cooled to liquefaction temperature firstly in an exchanger 22 traversed by a counterflowing auxiliary stream of undercooled liquid methane admitted through a duct 23 and exhausted through a duct 25 and secondly in an exchanger 27 traversed by the counterflowing auxiliary methane supplied through a duct 28 from a turbine 66 and exhausted through a duct 29; the so liquefied natural methane being expanded ...

Liquefaction of natural gas

Systems and a method for the formation of a liquefied natural gas (LNG) are disclosed herein. The system includes a first fluorocarbon refrigeration system configured to chill a natural gas using a first fluorocarbon refrigerant and a second fluorocarbon refrigeration system configured to further chill the natural gas using a second fluorocarbon refrigerant. The system also includes a nitrogen refrigeration system configured to cool the natural gas using a nitrogen refrigerant to produce LNG and a nitrogen rejection unit configured to remove nitrogen from the LNG. As an alternative embodiment, the nitrogen refrigeration system can be replaced by a methane autorefrigeration system.

PARALLEL COMPRESSION IN LNG PLANTS USING A DOUBLE FLOW COMPRESSOR

A system and method is provided for increasing the capacity and efficiency of natural gas liquefaction processes by debottlenecking the refrigerant compression system. A secondary compression circuit comprising at least one double flow compressor is provided in parallel fluid flow communication with at least a portion of a primary compression circuit.

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.

For the pre-cooling of the LNG in the application of the overall gear-type compressor

Natural gas liquefaction - using independent modular liquefaction units

Heat exchanger module for several different coolants - esp. for gas liquefaction comprises one drum per coolant

PROCEEDED OF PRODUCTION Of a NATURAL GAS CURRENT LIQUIFIES SUPERCOOLED STARTING FROM a CHARGING CURRENT OF NATURAL GAS AND ASSOCIATED INSTALLATION

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).

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.

SYSTEM AND METHOD FOR LIQUID AIR PRODUCTION, POWER STORAGE AND POWER RELEASE

Turboverdichterstrang und Verfahren zum Betreiben desselben sowie Erdgasverflüssigungsanlage mit dem Turboverdichterstrang

Ein Turboverdichterstrang weist eine Turboverdichtereinheit und zum Antreiben der Turboverdichtereinheit ein Antriebsaggregat auf, das eines Gasturbine sowie einen Generator und eine Dampfturbine aufweist. Die Dampfturbine ist zusammen mit dem Generator an die Turboverdichtereinheit und die Gasturbine mittels einer Kupplungseinrichtung kuppelbar. Die Kupplungseinrichtung weist eine Überholkupplung und einen Kupplungserreger auf, mit dem die Überholkupplung aus einem Ausrückzustand in einen Aktivzustand bringbar ist, in dem die Überholkupplung bei Synchrondrehzahl der Gasturbine und der Dampfturbine einrückt und, wenn die Überholkupplung eingerückt ist, bei einer Erhöhung der Drehzahl der Dampfturbine und des Generators ausrückt, so dass der Generator von der Dampfturbine mit einer höheren Drehzahl als die Turboverdichtereinheit von der Gasturbine antreibbar ist. A turbocompressor train has a turbocompressor unit and, for driving the turbocompressor unit, a drive unit which has a gas turbine as well as a generator and a steam turbine. The steam turbine can be coupled together with the generator to the turbocompressor unit and the gas turbine by means of a coupling device. The clutch device has an overrunning clutch and a clutch exciter with which the overrunning clutch can be brought from a disengaged state into an active state in which the overrunning clutch engages at synchronous speed of the gas turbine and the steam turbine and, when the overrunning clutch is engaged, with an increase in the rotational speed of the steam turbine and the generator, so that the generator is drivable by the steam turbine at a higher speed than the turbo compressor unit of the gas turbine.

PROZESSKOMPONENTEN, BEHÄLTER UND ROHRE, GEEIGNET ZUM AUFNEHMEN UND TRANSPORTIEREN VON FLUIDEN KRYOGENER TEMPERATUR

Process components (12), containers (15, 11), and pipes are provided that are constructed from ultra-high strengh, low alloy steels containing less than 9 wt.% mickel and having tensile strengths greater than 830 MPa (120 ksi) and DBTTs lower than about -73 {C (-100 {F).

HYBRID CYCLE FOR THE PRODUCTION OF LIQUID NATURAL GAS

HYBRID CYCLE FOR THE PRODUCTION OF LIQUID NATURAL GAS

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.

Method for producing a stream of subcooled liquefied natural gas using a natural gas feedstream, and associated facility

The invention relates to a method which includes passing the feedstream (12) into a first heat exchanger (16) to perform a heat exchange with a stream (60) of gaseous coolant produced in a first refrigeration cycle (26) including a first dynamic turbo-expander (34). The method includes passing a precooled feedstream (18) into a second heat exchanger (20) to perform a heat exchange with a second stream (62) of gaseous coolant produced in a second refrigeration cycle (28) including a second dynamic turbo-expander (42). The method includes passing a stream of liquefied natural gas (22) into a third heat exchanger to perform a heat exchange with a third stream (64) of coolant produced in a third refrigeration cycle (30) including a third dynamic turbo-expander (52), distinct from the first turbo-expander (34) and from the second turbo-expander (42).

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.

CONFIGURATIONS AND METHODS OF INTEGRATED NGL RECOVERY AND LNG LIQUEFACTION

Contemplated plants include a NGL recovery portion and a LNG liquefaction portion, wherein the NGL recovery portion provides a low-temperature and high- pressure overhead product directly to the LNG liquefaction portion. Feed gas cooling and condensation are most preferably performed using refrigeration cycles that employ refrigerants other than the demethanizer/absorber overhead product. Thus, cold demethanizer/absorber overhead product is compressed with the turbo-expansion and delivered to a liquefaction portion at significantly lower temperature and higher pressure without net compression energy expenditure.

PARALLEL COMPRESSION IN LNG PLANTS USING A DOUBLE FLOW COMPRESSOR

A system and method is provided for increasing the capacity and efficiency of natural gas liquefaction processes by debottlenecking the refrigerant compression system. A secondary compression circuit comprising at least one double flow compressor is provided in parallel fluid flow communication with at least a portion of a primary compression circuit.

DEVICE AND METHOD FOR LIQUEFYING NATURAL GAS OR BIOGAS

DEVICE AND METHOD FOR LIQUEFYING NATURAL GAS OR BIOGAS

Le dispositif (100) de liquéfaction d'un gaz naturel ou d'un biogaz, comporte : - un premier compresseur (105) d'un premier composé réfrigérant vaporisé, - un premier échangeur (110) thermique de refroidissement du premier composé réfrigérant comprimé, - un premier corps (115) d'échange de chaleur, - un moyen (120) de détente du premier composé réfrigérant refroidi dans le premier corps d'échange, - un deuxième compresseur (125) d'un deuxième composé réfrigérant vaporisé, - un deuxième échangeur (130) thermique de refroidissement du deuxième composé réfrigérant comprimé, - un deuxième corps (135) d'échange de chaleur, - un moyen (140) de détente du deuxième composé réfrigérant refroidi dans le deuxième corps d'échange et un troisième corps (145) d'échange de chaleur entre le premier composé réfrigérant détendu et le deuxième composé refroidi en sortie du deuxième échangeur thermique, le deuxième composé refroidi dans le troisième corps étant fourni au premier corps d'échange de chaleur. The device (100) for liquefying a natural gas or a biogas, comprises: - a first compressor (105) of a first vaporized refrigerant compound, - a first heat exchanger (110) for cooling the first compressed refrigerant compound , - a first heat exchange body (115), - a means (120) for expanding the first refrigerant compound cooled in the first exchange body, - a second compressor (125) of a second vaporized refrigerant compound, - a second heat exchanger (130) for cooling the second compressed refrigerant compound, - a second heat exchange body (135), - a means (140) for expanding the second refrigerant compound cooled in the second exchange body and a third body (145) for heat exchange between the first expanded refrigerant compound and the second compound cooled at the outlet of the second heat exchanger, the second compound cooled in the third body being supplied to the first heat exchange body .

천연가스 피드스트림으로부터 과냉각된 액화천연가스 스트림의 제조방법과 그 장치

... 본 발명은 제1 다이나믹 팽창터빈(34)으로 구성되는 제1 냉동사이클(26)에서 생성된 기체상 냉매의 스트림(60)과 열교환이 이루어지도록 제1 열교환기(16)를 통하여 피드스트림(12)을 통과시키는 단계로 구성된 방법에 관한 것이다. 이 방법은 제2 다이나믹 팽창터빈(42)으로 구성되는 제2 냉동사이클(28)에서 생성된 기체상 냉매의 제1 스트림(62)과 열교환이 이루어지도록 제2 열교환기(20)를 통하여 예냉된 피드스트림(18)을 통과시키는 단계를 포함한다. 이 방법은 제1 팽창터빈(34)과 제2 팽창터빈(42)과는 별개인 제3 다이나믹 팽창터빈(52)으로구성된 제3 냉동사이클(30)에서 생성된 제3 냉매스트림(64)과 열교환이 이루어지도록 제3 열교환기를 통하여 액화천연가스 스트림(22)을 통과시키는 단계를 포함한다.

PROCESS AND APPARATUS FOR SWEETENING AND LIQUEFYING A GAS STREAM

A process and apparatus for liquefying a gas stream comprising hydrocarbons and sour species is provided in which the sour species are removed in liquefied form as the sweetened gas stream is progressively cooled to liquefaction temperatures. The process involves cooling the gas stream in a manner to produce a cooled gas stream comprising gaseous hydrocarbons and residual sour species. The cooled gas stream is then treated with a cold solvent to deplete the cooled gas stream of residual sour species. The resulting cooled sweetened gas stream is then further cooled to produce liquid hydrocarbons.

Liquefaction of Natural Gas

Systems and a method for the formation of a liquefied natural gas (LNG) are disclosed herein. The system includes a first fluorocarbon refrigeration system configured to chill a natural gas using a first fluorocarbon refrigerant and a second fluorocarbon refrigeration system configured to further chill the natural gas using a second fluorocarbon refrigerant. The system also includes a nitrogen refrigeration system configured to cool the natural gas using a nitrogen refrigerant to produce LNG and a nitrogen rejection unit configured to remove nitrogen from the LNG. As an alternative embodiment, the nitrogen refrigeration system can be replaced by a methane autorefrigeration system. 1. A hydrocarbon processing system for formation of a liquefied natural gas (LNG) , comprising:a first fluorocarbon refrigeration system configured to chill a natural gas using a first fluorocarbon refrigerant;a second fluorocarbon refrigeration system configured to further chill the natural gas using a second fluorocarbon refrigerant;a methane autorefrigeration system configured to cool the natural gas to produce LNG; anda nitrogen rejection unit upstream of the methane autorefrigeration system and configured to remove nitrogen from the natural gas.2. The hydrocarbon processing system of claim 1 , wherein the first fluorocarbon refrigeration system is configured to cool the second fluorocarbon refrigerant of the second fluorocarbon refrigeration system.3. (canceled)4. The hydrocarbon processing system of claim 1 , wherein the first fluorocarbon refrigeration system or the second fluorocarbon refrigeration system claim 1 , or both claim 1 , comprises multiple cooling cycles.5. (canceled)6. The hydrocarbon processing system of claim 1 , wherein the first fluorocarbon refrigeration system comprises:a compressor configured to compress the first fluorocarbon refrigerant to provide a compressed first fluorocarbon refrigerant;a chiller configured to cool the compressed first fluorocarbon ...

Method for producing a stream of subcooled liquefied natural gas using a natural gas feedstream, and associated facility

Method for handling the shutdown of a turbomachine string in a liquefaction plant of a gaseous product

A method for handling the shutdown of a turbomachine string (2) installed in a plant (8) for the liquefaction of a gaseous product comprising at least two turbomachine strings (2, 2') comprises the steps of detecting the shutdown of a first turbomachine string (2'); promptly increasing the driving torque on a shaft (3) of a second turbomachine string (2) when the shutdown is detected; maintaining the driving torque increase on the shaft (3) of the second turbomachine string (2) until a preset speed of the motor driver (6, 7) is reached or a predetermined period of time expires.

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.

LIQUEFACTION OF NATURAL GAS

A method for cooling gases, in particular hydrogen and helium, at very low temperatures

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 de compression (320) de dioxyde de carbone vaporisé, - une première étape d'échange (325) thermique pour refroidir le dioxyde de carbone comprimé, - une première étape d'échange (330) chaleur entre le gaz, le dioxyde de carbone refroidi et du dioxyde de carbone détendu au cours d'une étape (335) de détente du dioxyde de carbone refroidi, - l'étape (335) de détente du dioxyde de carbone refroidi au cours de la première étape d'échange (330) de chaleur, le dioxyde de carbone détendu étant fourni à la première étape d'échange (330) de chaleur, - une deuxième étape de compression (305) d'un fluide réfrigérant, - une deuxième étape d'échange (310) thermique de refroidissement du fluide réfrigérant comprimé, - une deuxième étape (360) d'échange de chaleur entre le gaz, le fluide réfrigérant refroidi et le fluide réfrigérant détendu au cours d'une étape (315) de détente du fluide réfrigérant refroidi, - le moyen (315) de détente du fluide réfrigérant refroidi au cours de la deuxième étape d'échange (360) de chaleur, le fluide réfrigérant détendu étant fourni à la deuxième étape d'échange de chaleur. The method (300) for liquefying a natural gas or a biogas comprises: - a first compression step (320) of vaporized carbon dioxide, - a first heat exchange step (325) to cool the dioxide of compressed carbon, - a first heat exchange step (330) between the gas, the cooled carbon dioxide and the expanded carbon dioxide during a step (335) of expansion of the cooled carbon dioxide, - the step (335) of expanding the cooled carbon dioxide during the first heat exchange step (330), the expanded carbon dioxide being supplied to the first heat exchange step (330), - a second step compression (305) of a refrigerant fluid, - a second heat exchange step (310) for cooling the compressed refrigerant fluid, - a second step (360) of heat ...

LIQUEFACTION OF NATURAL GAS

process and installation for the production of a liquefied natural gas stream subcooled from a charging current of natural gas

СПОСОБ ДЛЯ ОЧИСТКИ ОТ КИСЛЫХ СОЕДИНЕНИЙ И СЖИЖЕНИЯ ГАЗООБРАЗНОГО ПОТОКА И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

FIELD: chemistry. SUBSTANCE: method and device of liquefaction of a gaseous flow, which contains hydrocarbons and acidic compounds, and in which the acidic compounds are removed in a liquefied state, when the gaseous flow, purified from the acidic compounds is gradually cooled to the liquefaction temperature. The method includes cooling the gaseous flow in such a way as to obtain the cooled gaseous flow, containing gaseous hydrocarbons and residual acidic compounds. After that, the obtained gaseous flow, purified from the acidic compounds, is additionally cooled to obtain liquid hydrocarbons. EFFECT: method improvement. 20 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК F25J 3/02 (11) (13) 2 533 260 C2 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2012100736/06, 11.06.2010 (24) Дата начала отсчета срока действия патента: 11.06.2010 (72) Автор(ы): ГНАНЕНДРАН, Нималан (AU), УИЛКС, Мартин (AU) 12.06.2009 AU 2009902752 (43) Дата публикации заявки: 20.07.2013 Бюл. № 20 R U (73) Патентообладатель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) Приоритет(ы): (30) Конвенционный приоритет: (45) Опубликовано: 20.11.2014 Бюл. № 32 5724833 A1, 10.03.1998 . US 5842357 A1, 01.12.1998 . US6823692 B1, 30.11.2004 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 12.01.2012 (86) Заявка PCT: 2 5 3 3 2 6 0 (56) Список документов, цитированных в отчете о поиске: WO 2008095258 A1,14.08.2008 . US 2 5 3 3 2 6 0 R U (87) Публикация заявки PCT: C 2 C 2 AU 2010/000722 (11.06.2010) WO 2010/141995 (16.12.2010) Адрес для переписки: 109012, Москва, ул. Ильинка, 5/2, ООО "Союзпатент", О.И.Воль (54) СПОСОБ ДЛЯ ОЧИСТКИ ОТ КИСЛЫХ СОЕДИНЕНИЙ И СЖИЖЕНИЯ ГАЗООБРАЗНОГО ПОТОКА И УСТРОЙСТВО ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ (57) Реферат: Разработаны способ и устройство сжижения таким образом, чтобы получить охлажденный газообразного потока, который содержит газообразный поток, который содержит углеводороды и кислые соединения и в ...

Усовершенствованные способ и система охлаждения углеводородного потока.

ПАРАЛЛЕЛЬНОЕ СЖАТИЕ НА УСТАНОВКАХ СПГ С ИСПОЛЬЗОВАНИЕМ ДВУХПОТОЧНОГО КОМПРЕССОРА

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2018 110 620 A (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2018110620, 26.03.2018 (71) Заявитель(и): ЭР ПРОДАКТС ЭНД КЕМИКАЛЗ, ИНК. (US) Приоритет(ы): (30) Конвенционный приоритет: 29.03.2017 US 15/472,701 Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр. 3, ООО "Юридическая фирма Городисский и Партнеры" Стр.: 1 A 2 0 1 8 1 1 0 6 2 0 R U A (57) Формула изобретения 1. Система компрессии, сконфигурированная с возможностью сжатия первого потока первого хладагента, имеющего первое давление для получения первого сжатого потока хладагента, имеющего давление полностью сжатого потока, включающая в себя: по меньшей мере один теплообменник предварительного охлаждения, при этом каждый из по меньшей мере одного теплообменников предварительного охлаждения сконфигурирован с возможностью охлаждения углеводородного флюида путем косвенного теплообмена в противотоке с первым хладагентом; первичный контур компрессии, имеющий множество ступеней первичного компрессора и множество частично сжатых потоков, при этом каждая из множества ступеней компрессора имеет сторону всасывания и сторону нагнетания, каждый из множества частично сжатых потоков находится в сообщении по потоку флюида с выходом одной из множества ступеней первичного компрессора и входом другой из множества ступеней первичного компрессора, при этом каждый из множества частично сжатых потоков имеет давление, которое выше, чем первое давление и ниже чем давление полностью сжатого потока, давление каждого из множества частично сжатых потоков отличается от давления каждого другого из множества частично сжатых потоков, при этом последняя ступень первичного компрессора из множества ступеней первичного компрессора имеет выход, который выдает первую часть первого сжатого потока хладагента; вторичный контур компрессии, включающий двухпоточный компрессор, имеющий корпус, который ограничивает внутренний ...

Process components, containers, and pipes suitable for containing and transporting cryogenic temperature fluids

Process components (12), containers (15, 11), and pipes are provided that are constructed from ultra-high strengh, low alloy steels containing less than 9 wt.% mickel and having tensile strengths greater than 830 MPa (120 ksi) and DBTTs lower than about -73 {C (-100 {F).

Hybrid cycle for liquefied natural gas

PARALLEL COMPRESSION IN LNG PLANTS USING A DOUBLE FLOW COMPRESSOR

A system and method is provided for increasing the capacity and efficiency of natural gas liquefaction processes by debottlenecking the refrigerant compression system. A secondary compression circuit comprising at least one double flow compressor is provided in parallel fluid flow communication with at least a portion of a primary compression circuit. rU, 0( coL (co --, Co 00 to cov Cco ...

SEMI-CLOSED LOOP LNG PROCESS

A semi-closed loop system for producing liquefied natural gas (LNG) that combines certain advantages of closed-loop systems with certain advantages of open-loop systems to provide a more efficient and effective hybrid system. In the semi-closed loop system, the final methane refrigeration cycle provides significant cooling of the natural gas stream via indirect heat transfer, as opposed to expansion-type cooling. A minor portion of the LNG product from the methane refrigeration cycle is used as make-up refrigerant in the methane refrigeration cycle. A pressurized portion of the refrigerant from the methane refrigeration cycle is employed as fuel gas. Excess refrigerant from the methane refrigeration cycle can be recombined with the processed natural gas stream, rather than flared.

CONFIGURATIONS AND METHODS OF INTEGRATED NGL RECOVERY AND LNG LIQUEFACTION

Contemplated plants include a NGL recovery portion and a LNG liquefaction portion, wherein the NGL recovery portion provides a low-temperature and high-pressure overhead product directly to the LNG liquefaction portion. Feed gas cooling and condensation are most preferably performed using refrigeration cycles that employ refrigerants other than the demethanizer/absorber overhead product. Thus, cold demethanizer/absorber overhead product is compressed with the turbo-expansion and delivered to a liquefaction portion at significantly lower temperature and higher pressure without net compression energy expenditure.

PROCESS COMPONENTS, CONTAINERS, AND PIPES SUITABLE FOR CONTAINING AND TRANSPORTING CRYOGENIC TEMPERATURE FLUIDS

Process components (12), containers (15, 11), and pipes are provided that are constructed from ultra-high strengh, low alloy steels containing less than 9 wt.% mickel and having tensile strengths greater than 830 MPa (120 ksi) and DBTTs lower than about -73 °C (-100 °F).

Process components, containers, and pipes suitable for containing and transporting cryogenic temperature fluids

Configurations and methods of integrated NGL recovery and LNG liquefaction

Integrally-geared compressors for precooling in LNG applications

A natural gas liquefaction system is disclosed, which comprises at least a pre-cooling loop (103), through which a first refrigerant is adapted to circulate. The pre-cooling loop comprises at least one compressor (109) for pressurizing the first refrigerant; at least one prime mover (111) for driving the compressor (109); at least one condenser (115) for removing heat from the first refrigerant; at least a first expansion element (119A-119D) for expanding the first refrigerant; at least a first heat exchanger (123A- 123D) for transferring heat from natural gas to the first refrigerant. The system further comprises at least a cooling loop (105), downstream of the pre-cooling loop, where through a second refrigerant circulates. The natural gas is adapted to be sequentially cooled in the pre-cooling loop and in the cooling loop. The compressor of the pre-cooling loop is an integrally-geared turbo-compressor comprising a plurality of compressor stages (109A-109D).

PROCESS FOR COOLING A PRODUCT IN A HEAT EXCHANGER EMPLOYING MICROCHANNELS

This invention relates to a process for cooling or liquefying a fluid product (e.g., natural gas) in a heat exchanger, the process comprising: flowing a fluid refrigerant through a set of refrigerant microchannels in the heat exchanger; and flowing the product through a set of product microchannels in the heat exchanger, the product flowing through the product microchannels exchanging heat with the refrigerant flowing through the refrigerant microchannels, the product exiting the set of product microchannels being cooler than the product entering the set of product microchannels. The process has a wide range of applications, including liquefying natural gas.

Process of liquefaction and gas supercooling

Process of liquefaction of natural gases

Heat exchanger module for several different coolants - esp. for gas liquefaction comprises one drum per coolant

METHOD AND APPARATUS FOR THE LIQUEFACTION OF A FEED GAS

INTEGRALLY-GEARED COMPRESSORS FOR PRECOOLING IN LNG APPLICATIONS

SEMI-CLOSED LOOP LNG PROCESS

A semi-closed loop system for producing liquefied natural gas (LNG) that combines certain advantages of closed-loop systems with certain advantages of open-loop systems to provide a more efficient and effective hybrid system. In the semi-closed loop system, the final methane refrigeration cycle provides significant cooling of the natural gas stream via indirect heat transfer, as opposed to expansion-type cooling. A minor portion of the LNG product from the methane refrigeration cycle is used as make-up refrigerant in the methane refrigeration cycle. A pressurized portion of the refrigerant from the methane refrigeration cycle is employed as fuel gas. Excess refrigerant from the methane refrigeration cycle can be recombined with the processed natural gas stream, rather than flared. © KIPO & WIPO 2007 ...

축류 압축기와 원심 압축기를 포함하는 ＬＮＧ 플랜트

... 본 발명에 따른 LNG 플랜트는 압축 트레인(100)과 추가 압축 트레인(200)을 포함하고, 예를 들어 3-사이클 순수-냉매 액화 기술 또는 다중-사이클 순수-냉매 및 혼합-냉매 액화 기술을 유익하게 구현할 수 있다. 상기 압축 트레인(100)은 제1 세트의 축방향 압축 단(311, 312)과, 제2 세트의 축방향 압축 단(321, 322, 323)과, 하나의 메인 입구(301)와, 하나의 메인 출구(302)와, 하나의 보조 입구(303) 및/또는 하나의 보조 출구를 포함하고, 상기 보조 입구(303)를 통해 압축기(130)에 들어가는 유체가 실질적인 반경방향에서 실질적인 축방향으로 방향 전환되거나 및/또는 상기 보조 출구를 통해 압축기(130)에서 나가는 유체가 실질적인 축방향에서 실질적인 반경방향으로 방향 전환된다. 상기 추가 압축 트레인(200)은 원심형이고 개방형인 제1 세트의 임펠러(411, 412)와, 원심형이고 덮개형인 제2 세트의 임펠러(421, 422, 423)을 포함한다.

SYSTEM AND METHOD FOR LIQUID AIR PRODUCTION, POWER STORAGE AND POWER RELEASE

Systems and methods for storing and releasing energy comprising directing inlet air into a vertical cold flue assembly, a portion of moisture being removed from the air within the cold flue assembly. The air is directed out of the cold flue assembly and compressed. The remaining moisture is substantially removed and the carbon dioxide is removed from the air by adsorption. The air is cooled in a main heat exchanger such that it is substantially liquefied using refrigerant loop air. The substantially liquefied air is directed to a storage apparatus. The refrigerant loop air is cooled by a mechanical chiller and by a plurality of refrigerant loop air expanders. In energy release mode, working loop fluid warms the released liquid air such that the released liquid air is substantially vaporized, and the released liquid air cools the working loop fluid such that the working loop fluid is substantially liquefied. A portion of the released liquid air is directed to the at least one generator and ...

SYSTEM FOR COMBINED CYCLE MECHANICAL DRIVE IN CRYOGENIC LIQUEFACTION PROCESSES

A system for producing liquefied and sub-cooled natural gas by means of a refrigeration assembly using a single phase gaseous refrigerant comprises at least two expanders; a compressor assembly; a heat exchanger assembly for heat absorption from natural gas; and a heat rejection assembly, in which the expanders are arranged in expander loops and the refrigerant to the respective expander is served in a compressed flow by means of the compressor assembly having compressors or compressor stages enabling adapted inlet and outlet pressures for the respective expander. According to the present the expanders and compressors assembly are assembled in two mechanically connected compressor and expander packages (200, 300) of which one is driven by a gas turbine (201) and the other is driven by a steam turbine (301), the steam primarily being generated by exhaust gases from the gas turbine in a waste heat recovery unit (202), and in that the expanders and compressors assemblies are distributed between the two compressor and expander packages to optimize the steam utilization and to balance the power generated by the gas turbine and the steam turbine.

Method and apparatus for liquefaction of natural gas

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 ...

Managing Make-Up Gas Composition Variation for a High Pressure Expander Process

A method for liquefying a feed gas stream. A refrigerant stream is cooled and expanded to produce an expanded, cooled refrigerant stream. Part or all of the expanded, cooled refrigerant stream is mixed with a make-up refrigerant stream in a separator, thereby condensing heavy hydrocarbon components from the make-up refrigerant stream and forming a gaseous expanded, cooled refrigerant stream. The gaseous expanded, cooled refrigerant stream passes through a heat exchanger zone to form a warm refrigerant stream. The feed gas stream is passed through the heat exchanger zone to cool at least part of the feed gas stream by indirect heat exchange with the expanded, cooled refrigerant stream, thereby forming a liquefied gas stream. The warm refrigerant stream is compressed to produce the compressed refrigerant stream.

Pretreatment, Pre-Cooling, and Condensate Recovery of Natural Gas By High Pressure Compression and Expansion

A method and apparatus for producing liquefied natural gas (LNG) from a natural gas stream. Heavy hydrocarbons are removed from the natural gas stream in a separator to generate a bottom stream and a separated natural gas stream, which is used as a coolant in a heat exchanger to generate a pretreated natural gas stream. The pretreated natural gas stream is compressed and cooled to form a chilled pretreated natural gas stream, part of which forms a recycle stream to exchange heat with the separated natural gas stream in the heat exchanger, thereby generating a cooled recycle stream. The temperature and pressure of the cooled recycle stream are reduced. The cooled recycle stream is then separated into an overhead stream and a reflux stream, which is directed to the separator. The chilled pretreated gas stream is liquefied to form LNG. 1. A method of producing liquefied natural gas (LNG) from a natural gas stream , the method comprising:removing heavy hydrocarbons from the natural gas stream in a first separator to thereby generate a separated natural gas stream and a separator bottom stream;using the separated natural gas stream as a coolant in a heat exchanger to thereby generate a pretreated natural gas stream;compressing and cooling the pretreated natural gas stream to form a chilled pretreated to natural gas stream;recycling a portion of the chilled pretreated natural gas stream as a recycle stream to exchange heat, in the heat exchanger, with the separated natural gas stream, thereby generating a cooled recycle stream;reducing a temperature and a pressure of the cooled recycle stream;separating the cooled recycle stream into a gaseous separator overhead stream and a reflux stream;directing the reflux stream to a top portion of the first separator; andliquefying the chilled pretreated gas stream to form LNG.2. The method of claim 1 , wherein liquefying the chilled pretreated gas stream is performed in one ofone or more single mixed refrigerant (SMR) liquefaction ...

Arctic cascade method for natural gas liquefaction in a high-pressure cycle with pre-cooling by ethane and sub-cooling by nitrogen, and a plant for its implementation

A technology liquefies natural gas. The natural gas liquefaction method pre-cools treated natural gas by ethane evaporation, sub-cools liquefied gas using cooled nitrogen as a refrigerant, reduces liquefied gas pressure, separates non-liquefied gas and diverts liquefied natural gas. Before pre-cooling the natural gas is compressed, ethane is evaporated during the multi-stage pre-cooling of liquefied gas with simultaneous evaporation of ethane using cooled ethane as a refrigerant. Ethane generated by evaporation is compressed, condensed and used as a refrigerant during the cooling of liquefied gas and nitrogen, with nitrogen being compressed, cooled, expanded and fed to the natural gas sub-cooling stage. The natural gas liquefaction unit contains a natural gas liquefaction circuit, an ethane circuit and a nitrogen circuit. The natural gas liquefaction circuit includes a natural gas compressor, a cooler unit, ethane vaporizers, a closed-end subcooling heat exchanger, and a separator, connected in series.

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 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 one or more compression stages to produce a compressed first refrigerant;(b) cooling the compressed first refrigerant against ambient fluid in one or more ambient heat exchangers to produce a cooled first refrigerant at a first temperature; (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;', 'wherein at least one fluid stream being cooled in the at least one cooling circuit comprises the hydrocarbon feed stream and step (c) produces a cooled hydrocarbon stream;, '(c) cooling a fluid stream in each of at least one cooling circuit located in downstream fluid flow communication from the one or more ambient heat exchangers, each of the at least one cooling circuit having at least one evaporation stage, each of the ...

METHOD FOR HANDLING THE SHUTDOWN OF A TURBOMACHINE STRING IN A LIQUEFACTION PLANT OF A GASEOUS PRODUCT

A method for handling the shutdown of a turbomachine string installed in a plant for the liquefaction of a gaseous product comprising at least two turbomachine strings comprises the steps of detecting the shutdown of a first turbomachine string; promptly increasing the driving torque on a shaft of a second turbomachine string when the shutdown is detected; maintaining the driving torque increase on the shaft of the second turbomachine string until a preset speed of the motor driver is reached or a predetermined period of time expires. 1. A method for handling the shutdown of a turbomachine string , said turbomachine string being installed in a plant for the liquefaction of a gaseous product comprising at least two turbomachine strings , each turbomachine string comprises at least a motor driver and at least a driven compressor , the method comprising the steps of:detecting the shutdown of a first turbomachine string;promptly increasing the driving torque on a shaft of a second turbomachine string when the shutdown is detected;maintaining said driving torque increase on the shaft of the second turbomachine string so that the speed of the motor driver is increased from a current speed to a preset speed or a predetermined period of time expires.2. The method according to claim 1 , wherein the motor driver is a turbine and/or a helper motor claim 1 , preferably a helper electric motor.3. The method according to claim 1 , wherein the preset speed is the maximum operating speed of the motor driver.4. The method according to claim 1 , further comprising the step of maintaining said preset speed for a predetermined period of time or until the event causing the shutdown of the first turbomachine string is ended.5. The method according to claim 1 , further comprising the step of maintaining said driving torque increase until the event causing the shutdown of the first turbomachine string is ended.6. The method according to claim 1 , wherein said driving torque increase is ...

LNG PLANT INCLUDING AN AXIAL COMPRESSOR AND A CENTRIFUGAL COMPRESSOR

The LNG plant comprises a compression train and a further compression. The compression train () comprises comprising an engine and a compressor driven by the engine; the compressor is an axial compressor and comprises a first set of axial compression stages and a second set of axial compression stages arranged downstream the first set of axial compression stages; at least the first set and the second set of axial compression stages are housed inside one case. The further compression train comprises a further engine and a further compressor driven by the further engine; the further compressor is a centrifugal compressor and comprises a first set of impellers and a second set of impellers arranged downstream or upstream the first set of impellers. 1. An LNG plant comprising a compression train;wherein the compression train comprises an engine and a compressor driven by the engine; wherein the compressor is an axial compressor and comprises a first set of axial compression stages and a second set of axial compression stages arranged downstream the first set of axial compression stages;at least the first set and the second set of axial compression stages being housed inside one case; one main inlet arranged upstream the first set of axial compression stages,', 'one main outlet arranged downstream the second set of axial compression stages, and', 'at least one auxiliary inlet and/or at least one auxiliary outlet arranged downstream the first set of axial compression stages and upstream the second set of axial compression stages,, 'the compressor havingwherein the compressor is configured so that a fluid entering the compressor through the auxiliary inlet is redirected from a substantially radial direction to a substantially axial direction and/or a fluid exiting the compressor through the auxiliary outlet is redirected from a substantially axial direction to a substantially radial direction;wherein the LNG plant further comprises a further compression train, wherein the ...

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 ...

QUENCH SYSTEM FOR A REFRIGERATION CYCLE OF A LIQUEFIED NATURAL GAS FACILITY AND METHOD OF QUENCHING

A quench system for a refrigeration cycle of a liquefied natural gas (LNG) facility includes at least one compressor for compressing a refrigerant that cools a natural gas stream. Also included is a quench fluid supply structure containing a quench fluid. Further included is a cooler vessel and a quench fluid line extending from the quench fluid supply structure and through the cooler vessel for cooling therein, the quench fluid maintained in a liquid state through the entirety of the quench fluid line. Yet further included is a quench control valve disposed downstream of the cooler vessel to control a flow rate of the quench fluid routed therein. Also included is a refrigerant suction drum located downstream of the quench control valve and configured to receive the quench fluid from the quench fluid line, the refrigerant suction drum in fluid communication with at least one component for cooling. 1. A quench system for a refrigeration cycle of a liquefied natural gas (LNG) facility comprising:at least one compressor for compressing a refrigerant that cools a natural gas stream;a quench fluid supply structure containing a quench fluid;a cooler vessel;a quench fluid line extending from the quench fluid supply structure and through the cooler vessel for cooling therein, the quench fluid maintained in a liquid state through the entirety of the quench fluid line;a quench control valve disposed downstream of the cooler vessel along the quench fluid line to control a flow rate of the quench fluid routed therein; anda refrigerant suction drum located downstream of the quench control valve and configured to receive the quench fluid from the quench fluid line, the refrigerant suction drum in fluid communication with at least one component of the compressor for cooling the at least one component.2. The quench system of claim 1 , wherein the refrigerant comprises propane routed through a propane refrigerant cycle of the LNG facility and the quench fluid comprises propane.3. ...

Process for cooling a product in a heat exchanger employing microchannels for the flow of refrigerant and product

This invention relates to a process for cooling a product in a heat exchanger, the process comprising: flowing a refrigerant through a set of first microchannels in the heat exchanger; flowing a refrigerant through a set of second microchannels in the heat exchanger, the refrigerant flowing through the set of second microchannels being at a lower temperature, a lower pressure or both a lower temperature and a lower pressure than the refrigerant flowing through the set of first microchannels; and flowing a product through a set of third microchannels in the heat exchanger, the product exiting the set of third microchannels having a cooler temperature than the product entering the set of third microchannels. This process is suitable for liquefying gaseous products including natural gas.

Means for maintaining the substitutability of lng

Procedimento ed apparecchiatura per la liquefazione del gas naturale

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。

Natural gas liquefaction method

FIELD: oil, gas and coke-chemical industries. SUBSTANCE: invention relates to liquefaction of a hydrocarbon-enriched fraction, particularly natural gas. Fraction enriched with hydrocarbons is cooled and liquefied in at least two refrigerating cycles. Each refrigerating cycle has at least one circulation compressor. Coldest refrigerating cycle has two series-connected circulation compressors, namely one low-pressure circulating compressor and one high-pressure circulating compressor. With the exception of the high-pressure circulating compressor (C4, C4') in the coldest refrigerating cycle, circulating compressors (C1-C3, C1'-C3') with the same number of revolutions are used, which have a drive from only one gas turbine (GT). Gas turbine (GT) supplies at least 70 %, preferably at least 75 % of required total drive power of all circulation compressors (C1-C4, C1'-C4'). Circulation compressor (C4, C4') of high pressure in the coldest refrigerating cycle is driven by electric motor (M2) or steam turbine. EFFECT: technical result is improved reliability and compactness and simplified design. 5 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 698 565 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 1/0207 (2019.05); F25J 1/0214 (2019.05); F25J 1/0217 (2019.05); F25J 1/0264 (2019.05); F25J 1/0282 (2019.05); F25J 1/0283 (2019.05); F25J 1/0284 (2019.05); F25J 1/0287 (2019.05); F25J 1/0289 (2019.05); F25J 1/029 (2019.05); F25J 1/0292 (2019.05) (21)(22) Заявка: 2016105466, 18.02.2016 18.02.2016 (73) Патентообладатель(и): ЛИНДЕ АКЦИЕНГЕЗЕЛЛЬШАФТ (DE) Дата регистрации: (56) Список документов, цитированных в отчете о поиске: RU 2373465 C2, 20.11.2009. US 6253574 B1, 03.07.2001. RU 2352877 C2, 20.04.2009. DE 102005029275 A1, 28.12.2006. EA 800 B1, 24.04.2000. Приоритет(ы): (30) Конвенционный приоритет: 19.02.2015 DE 102015002164.8 (43) Дата ...

Parallel compression at lng units using double-stream compressor

FIELD: oil and gas industry. SUBSTANCE: invention discloses a system and a method of increasing efficiency and efficiency of natural gas liquefaction processes by increasing the throughput of the coolant compression system. Secondary compression loop, comprising at least one two-flow compressor, it is proposed to install in parallel communication along fluid flow with at least part of primary compression circuit. EFFECT: proposed is parallel compression at LNG plants using double-flow compressor. 20 cl, 1 tbl, 10 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 735 753 C2 (51) МПК F25J 1/00 (2006.01) F04D 25/16 (2006.01) F25B 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F25J 1/0227 (2020.08); F04D 25/16 (2020.08); F25B 1/04 (2020.08) (21)(22) Заявка: 2018110620, 26.03.2018 (24) Дата начала отсчета срока действия патента: Дата регистрации: (73) Патентообладатель(и): ЭР ПРОДАКТС ЭНД КЕМИКАЛЗ, ИНК. (US) 06.11.2020 29.03.2017 US 15/472,701 (43) Дата публикации заявки: 01.10.2019 Бюл. № 28 (56) Список документов, цитированных в отчете о поиске: US 20160131422 A1, 12.05.2016. JP 0005832526 B2, 16.12.2015. US 10443603 B2, 15.10.2019. RU 2168044 C2, 27.05.2001. (45) Опубликовано: 06.11.2020 Бюл. № 31 2 7 3 5 7 5 3 R U (54) ПАРАЛЛЕЛЬНОЕ СЖАТИЕ НА УСТАНОВКАХ СПГ С ИСПОЛЬЗОВАНИЕМ ДВУХПОТОЧНОГО КОМПРЕССОРА (57) Реферат: Предлагаются система и способ повышения двухпоточный компрессор, предлагается производительности и эффективности процессов установить в параллельном сообщении по потоку сжижения природного газа путем увеличения флюида с по меньшей мере частью первичного пропускной способности системы компрессии контура компрессии. 3 н. и 17 з.п. ф-лы, 1 табл., хладагента. Вторичный контур компрессии, 10 ил. включающий по меньшей мере один Стр.: 1 C 2 C 2 Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр. 3, ООО "Юридическая фирма Городисский и Партнеры" 2 7 3 5 7 5 3 Приоритет(ы): (30) Конвенционный ...

Method of natural gas liquefaction by the cycle of high pressure with the precooling of ethane and nitrogen "arctic cascade" and the installation for its implementation

FIELD: gas production industry. SUBSTANCE: invention relates to a natural gas liquefaction method. Method for liquefying natural gas consists in pre-cooling the prepared natural gas, separating ethane, supercool the liquefied gas with the use of cooled nitrogen as a coolant, reduce the pressure of the liquefied gas, separate the non-liquefied gas and withdraw the liquefied natural gas. In this case, before the preliminary cooling, the natural gas is compressed, the ethane is separated off in the process of multi-stage pre-cooling of the liquefied gas with simultaneous evaporation of ethane using cooled ethane as a refrigerant. Ethane, obtained by evaporation, is compressed, condensed and used as a coolant upon cooling of the liquefied gas and nitrogen, with nitrogen being compressed, cooled, expanded and fed to a supercooling step of natural gas. EFFECT: invention is aimed at simplifying of the technological process of liquefying natural gas. 10 cl, 1 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 645 185 C1 (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F25J 1/02 (2006.01) (21)(22) Заявка: 2017108800, 16.03.2017 (24) Дата начала отсчета срока действия патента: Дата регистрации: 16.02.2018 (45) Опубликовано: 16.02.2018 Бюл. № 5 (56) Список документов, цитированных в отчете о поиске: RU 2538192 C1, 10.01.2015. RU (54) СПОСОБ СЖИЖЕНИЯ ПРИРОДНОГО ГАЗА ПО ЦИКЛУ ВЫСОКОГО ДАВЛЕНИЯ С ПРЕДОХЛАЖДЕНИЕМ ЭТАНОМ И ПЕРЕОХЛАЖДЕНИЕМ АЗОТОМ "АРКТИЧЕСКИЙ КАСКАД" И УСТАНОВКА ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ (57) Реферат: Изобретение относится к технологии предварительного охлаждения сжижаемого газа сжижения природного газа. Способ сжижения с одновременным испарением этана с природного газа заключается в том, что использованием охлажденного этана в качестве подготовленный природный газ предварительно хладагента. Этан, полученный при испарении, охлаждают, отделяют этан, переохлаждают компримируют, конденсируют и ...

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 ...

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。

Semi-closed loop lng process

본 발명은 더욱 효율적이며 효과적인 하이브리드 시스템을 제공하기 위해 폐쇄 루프 시스템의 몇몇 장점을 개방 루프 시스템의 몇몇 장점과 조합한, 액화 천연 가스(LNG)를 생성하기 위한 반폐쇄 루프 시스템에 관한 것이다. 반폐쇄 루프 시스템에서, 최종 메탄 냉동 사이클은 팽창식 냉각에 반해, 간접 열 교환을 거쳐 천연 가스 스트림의 현저한 냉각을 제공한다. 메탄 냉동 사이클로부터의 LNG 제품의 작은 부분은 메탄 냉동 사이클 내의 보충 냉매로서 사용된다. 메탄 냉동 사이클로부터의 냉매의 가압된 부분은 연료 가스로서 사용된다. 메탄 냉동 사이클로부터의 여분의 냉매는 연소되기보다는 처리된 천연 가스 스트림과 재조합될 수 있다. 액화 천연 가스, 반폐쇄 루프 시스템, 메탄 냉동 사이클, 연료 가스, 냉매

Device and method for natural gas liquefaction

本发明涉及液化天然气的技术。一种液化天然气的方法，其中，通过乙烷蒸发将经处理的天然气预冷却，利用冷却氮作为制冷剂对液化气体进行过冷，将液化气体的压力降低，将非液化的气体分离，排出液化天然气。此外，在预冷却之前，将天然气压缩，在液化气体的多级预冷却过程中蒸发乙烷，同时使用冷却的乙烷作为制冷剂来蒸发乙烷。在蒸发过程中产生的乙烷被压缩、冷凝并在液化气体和氮气的冷却过程中用作制冷剂，其中氮气被压缩、冷却、膨胀并进料到天然气的过冷阶段。本发明简化了液化天然气的工艺流程。

Polar cascade method for liquefying natural gas in high pressure cycle with precooling by ethane and auxiliary cooling by nitrogen and plant for its implementation

본 발명은 천연가스를 액화시키는 기술에 관한 것이다. 천연가스의 액화 방법은 처리된 천연가스가 사전-냉각되고, 에탄이 분리되고, 냉각된 질소를 냉매로서 사용하여 액화되는 가스가 과-냉각되고, 액화되는 가스의 압력이 감소되고, 비-액화 가스가 분리되고 액화된 천연가스가 배출되는 것으로 구성된다. 또한, 사전-냉각 전에, 천연가스가 압축되고, 냉각된 에탄을 냉매로서 사용하여 에탄을 동시에 증발시키면서 액화되는 가스의 다단계 사전-냉각 공정에서 에탄이 분리된다. 증발 동안 생성된 에탄은 압축, 응축되어 액화되는 가스 및 질소의 냉각 동안 냉매로서 사용되며, 질소는 압축, 냉각, 팽창되어 천연가스의 과-냉각 단계로 공급된다. 본 발명은 천연가스 액화의 기술 공정을 단순화시킨다.

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.

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

The parallelly compressed of double-current compressor is used in LNG factories

提供一种通过消除制冷剂压缩系统的瓶颈来提高天然气液化过程的容量和效率的系统和方法。提供包括至少一个双流压缩机的次压缩回路流体流动并联相连主压缩回路的至少一部分。

Natural gas liquefaction - using independent modular liquefaction units

Modular system for a gas liquefaction plant particularly for liquefying natural gas, comprising a series of identical self-contained independent modular units each complete with all the necessary equipment for independent operation.

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。

NATURAL GAS LIQUID METHOD

А 2016105466 ко РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) 11 3 << < < Хх << < < << <® 13 ВО ‘’ 2016 105 466 А (50) МПК Е257 1000 (2006.01) Е25В 7/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2016105466, 18.02.2016 (71) Заявитель(и): ЛИНДЕ АКЦИЕНГЕЗЕЛЛЬШАФТ (ОЕ) Приоритет(ы): (30) Конвенционный приоритет: (72) Автор(ы): 19.02.2015 РЕ 102015002164.8 БАУЭР, Хайнц (ОЕ) (43) Дата публикации заявки: 21.08.2017 Бюл. № 24 Адрес для переписки: 129090, Москва, ул. Большая Спасская, д. 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) СПОСОБ СЖИЖЕНИЯ ПРИРОДНОГО ГАЗА (57) Формула изобретения 1. Способ сжижения обогащенной углеводородами фракции, в частности природного газа, причем - обогащенную углеводородами фракцию охлаждают и сжижают по меньшей мере в двух холодильных циклах, - каждый холодильный цикл имеет по меньшей мере один циркуляционный компрессор, и - наиболее холодный холодильный цикл имеет два последовательно подключенных циркуляционных компрессора, а именно один циркуляционный компрессор низкого давления и один циркуляционный компрессор высокого давления, отличающийся тем, что - за исключением циркуляционного компрессора (С4, С4”) высокого давления в наиболее холодном холодильном цикле применяют циркуляционные компрессоры (С1- СЗ, СГ-СЗ?) с одинаковым числом оборотов, - циркуляционные компрессоры (С1-СЗ, СТ’-СЗ?) с одинаковым числом оборотов имеют привод только от одной газовой турбины (СТ), - причем газовая турбина (СТ) поставляет по меньшей мере 70%, предпочтительно по меньшей мере 75% требуемой общей приводной мощности всех циркуляционных компрессоров (С1-С4, СГ-С4?), и - циркуляционный компрессор (С4, С4’) высокого давления в наиболее холодном холодильном цикле имеет привод от электрического двигателя (М2) или паровой турбины. 2. Способ по п.1, отличающийся тем, что между циркуляционными компрессорами (С1-СЗ, СР-СЗ’), имеющими привод от газовой турбины (СТ), и между этими циркуляционными ...

DEVICE AND METHOD FOR LIQUEFACTING NATURAL GAS OR BIOGAS

Le dispositif (100) de liquéfaction d'un gaz naturel ou d'un biogaz, comporte : - un premier compresseur (105) d'un premier composé réfrigérant vaporisé, - un premier échangeur (110) thermique de refroidissement du premier composé réfrigérant comprimé, - un premier corps (115) d'échange de chaleur, - un moyen (120) de détente du premier composé réfrigérant refroidi dans le premier corps d'échange, - un deuxième compresseur (125) d'un deuxième composé réfrigérant vaporisé, - un deuxième échangeur (130) thermique de refroidissement du deuxième composé réfrigérant comprimé, - un deuxième corps (135) d'échange de chaleur, - un moyen (140) de détente du deuxième composé réfrigérant refroidi dans le deuxième corps d'échange et un troisième corps (145) d'échange de chaleur entre le premier composé réfrigérant détendu et le deuxième composé refroidi en sortie du deuxième échangeur thermique, le deuxième composé refroidi dans le troisième corps étant fourni au premier corps d'échange de chaleur. The device (100) for liquefying a natural gas or a biogas comprises: a first compressor (105) of a first vaporized refrigerant compound; a first heat exchanger (110) for cooling the first compressed refrigerant compound; a first heat exchange body (115), a means (120) for expanding the first refrigerant component cooled in the first exchange body, a second compressor (125) for a second vaporized refrigerating compound, a second heat exchanger (130) for cooling the second compressed refrigerant compound; a second heat exchange body (135); a means (140) for expanding the cooled second refrigerant compound in the second heat exchange unit; a third body (145) for exchanging heat between the first expanded refrigerant and the second cooled compound at the outlet of the second heat exchanger, the second compound cooled in the third body being supplied to the first heat exchange body.

Gas liquefaction process

Liquefaction of natural gas

Systems and a method for the formation of a liquefied natural gas (LNG) are disclosed herein. The system includes a first fluorocarbon refrigeration system configured to chill a natural gas using a first fluorocarbon refrigerant and a second fluorocarbon refrigeration system configured to further chill the natural gas using a second fluorocarbon refrigerant. The system also includes a nitrogen refrigeration system configured to cool the natural gas using a nitrogen refrigerant to produce LNG and a nitrogen rejection unit configured to remove nitrogen from the LNG. As an alternative embodiment, the nitrogen refrigeration system can be replaced by a methane autorefrigeration system.

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.

Integrally-geared compressors for precooling in lng applications

A natural gas liquefaction system is disclosed, which comprises at least a pre-cooling loop (103), through which a first refrigerant is adapted to circulate. The pre-cooling loop comprises at least one compressor (109) for pressurizing the first refrigerant; at least one prime mover (111) for driving the compressor (109); at least one condenser (115) for removing heat from the first refrigerant; at least a first expansion element (119A-119D) for expanding the first refrigerant; at least a first heat exchanger (123A-123D) for transferring heat from natural gas to the first refrigerant. The system further comprises at least a cooling loop (105), downstream of the pre-cooling loop, where through a second refrigerant circulates. The natural gas is adapted to be sequentially cooled in the pre-cooling loop and in the cooling loop. The compressor of the pre-cooling loop is an integrally-geared turbo-compressor comprising a plurality of compressor stages (109A-109D).

Multi-level single-component refrigeration natural gas liquefaction system and multi-level single-component refrigeration natural gas liquefaction method

本发明公开了一种多级单组分制冷天然气液化系统及方法，净化天然气在六个换热器（蒸发器）和一个板翅换热器（天然气过冷器）中温度逐渐降低，直至液化；液化过程所需的冷量由丙烷、乙烯、甲烷三个系统提供，该系统调节手段丰富，能够为天然气液化过程提供相匹配的冷量，从而体现出该方法在操作上的灵活性和对原料的适应性。本发明的积极效果是：天然气液化过程能耗低；冷剂压缩机均为单组分压缩机，设计更容易，采购更方便，压缩机运行更稳定，并可采用国产化设备，有效降低了液化厂建设投资；液化过程换热器选择范围大，可采用冷箱结构，也可采用管壳式结构，或两者相结合的结构。

Process for cooling a product in a heat exchanger using microchannels.

Denne oppfinnelse vedrører en fremgangsmåte for avkjøling eller kondensering av et fluidprodukt (feks. naturgass) i en varmeveksler, idet fremgangsmåten omfatter: strømming av et fluidkjølemiddel gjennom et sett av kjølemiddelmikrokanaler i varmeveksleren; og strømming av produktet gjennom et sett av produktmikrokanaler i varmeveksleren, idet produktet som strømmer gjennom produktmikrokanalene utveksler varme med kjølemiddelet som strømmer gjennom kjølemiddelmikrokanalene, og idet produktet som forlater settet av produktmikrokanaler er kaldere enn produktet som går inn i settet av produktmikrokanaler. Fremgangsmåten har et bredt område av anvendelser som innbefatter kondensering av naturgass.

Liquefaction of natural gas

Process and apparatus for sweetening and liquefying a gas stream

A process and apparatus for liquefying a gas stream comprising hydrocarbons and sour species is provided in which the sour species are removed in liquefied form as the sweetened gas stream is progressively cooled to liquefaction temperatures. The process involves cooling the gas stream in a manner to produce a cooled gas stream comprising gaseous hydrocarbons and residual sour species. The cooled gas stream is then treated with a cold solvent to deplete the cooled gas stream of residual sour species. The resulting cooled sweetened gas stream is then further cooled to produce liquid hydrocarbons.

Integrally-geared compressors for precooling in lng applications

A natural gas liquefaction system is disclosed, which comprises at least a pre-cooling loop (103), through which a first refrigerant is adapted to circulate. The pre-cooling loop comprises at least one compressor (109) for pressurizing the first refrigerant; at least one prime mover (111) for driving the compressor (109); at least one condenser (115) for removing heat from the first refrigerant; at least a first expansion element (119A-119D) for expanding the first refrigerant; at least a first heat exchanger (123A- 123D) for transferring heat from natural gas to the first refrigerant. The system further comprises at least a cooling loop (105), downstream of the pre-cooling loop, where through a second refrigerant circulates. The natural gas is adapted to be sequentially cooled in the pre-cooling loop and in the cooling loop. The compressor of the pre-cooling loop is an integrally-geared turbo-compressor comprising a plurality of compressor stages (109A-109D).

Integrally-geared compressors for precooling in lng applications

A natural gas liquefaction system is disclosed, which comprises at least a precooling loop (103), through which a first refrigerant is adapted to circulate. The precooling loop comprises at least one compressor (109) for pressurizing the first refrigerant; at least one prime mover (111) for driving the compressor (109); at least one condenser (115) for removing heat from the first refrigerant; at least a 10 first expansion element (119A-119D) for expanding the first refrigerant; at least a first heat exchanger (123A-123D) for transferring heat from natural gas to the first refrigerant. The system further comprises at least a cooling loop (105), downstream of the pre-cooling loop, where through a second refrigerant circulates. The natural gas is adapted to be sequentially cooled in the pre-cooling loop and in the cooling loop. The compressor of the pre-cooling loop is an integrally-geared turbo-compressor comprising a plurality of compressor stages (109A-109D).

Hybrid cycle for the 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.

Liquefaction of natural gas

Systems and a method for the formation of a liquefied natural gas (LNG) are disclosed herein. The system includes a first fluorocarbon refrigeration system configured to chill a natural gas using a first fluorocarbon refrigerant and a second fluorocarbon refrigeration system configured to further chill the natural gas using a second fluorocarbon refrigerant. The system also includes a nitrogen refrigeration system configured to cool the natural gas using a nitrogen refrigerant to produce LNG and a nitrogen rejection unit configured to remove nitrogen from the LNG. As an alternative embodiment, the nitrogen refrigeration system can be replaced by a methane autorefrigeration system.

Method and apparatus for liquefying a feed gas

Refrigeration process for gas liquefaction which utilizes one or more vaporizing refrigerant cycles to provide refrigeration below about -40 DEG C and a gas expander cycle to provide refrigeration below about -100 DEG 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. <IMAGE>

Semi-closed loop LNG process

A semi-closed loop system for producing liquefied natural gas (LNG) that combines certain advantages of closed-loop systems with certain advantages of open-loop systems to provide a more efficient and effective hybrid system. In the semi-closed loop system, the final methane refrigeration cycle provides significant cooling of the natural gas stream via indirect heat transfer, as opposed to expansion-type cooling. A minor portion of the LNG product from the methane refrigeration cycle is used as make-up refrigerant in the methane refrigeration cycle. A pressurized portion of the refrigerant from the methane refrigeration cycle is employed as fuel gas. Excess refrigerant from the methane refrigeration cycle can be recombined with the processed natural gas stream, rather than flared.

PROCESS AND APPARATUS TO PRODUCE LIQUEFIED NATURAL GAS

EL PROCESO SE CARACTERIZA PORQUE COMPRENDE: A) ALIMENTAR UNA CORRIENTE DE GAS NATURAL PRESURIZADO A PRESION MANOMETRICA APROXIMADAMENTE SUPERIOR A 562480 kg/m� Y TEMPERATURA AMBIENTE A UN TURBOEXPANSOR PARA: 1) REDUCIR LA PRESION MANOMETRICA DE LA CORRIENTE A VALORES INFERIORES DE APROXIMADAMENTE 527325 kg/m� PREFERIBLEMENTE ENTRE 421860 kg/m� Y 457015 kg/m� Y ENFRIAR LA TEMPERATURA A MENOS DE -17,7�C, Y 2) EXTRAER TRABAJO DE LA CORRIENTE DE ALIMENTACION DURANTE LA REDUCCION DE PRESION POR MEDIO DEL EXPANSOR; B) DE LA SALIDA DEL EXPANSOR ALIMENTAR LA CORRIENTE DE ALIMENTACION HACIA EL CICLO DE REFRIGERACION EN CASCADA, DONDE DEBE EFECTUARSE INTERCAMBIO DE CALOR CON AL MENOS UN REFRIGERANTE, PREFERENTEMENTE METANO Y METILENO PARA PRODUCIR UNA CORRIENTE DE GAS NATURAL LICUADO DE APROXIMADAMENTE PRESION ATMOSFERICA Y TEMPERATURA INFERIOR A -161,1�C THE PROCESS IS CHARACTERIZED BECAUSE IT INCLUDES: A) SUPPLYING A NATURAL GAS STREAM PRESSURIZED TO MANOMETRIC PRESSURE APPROXIMATELY HIGHER THAN 562480 kg / m� AND AMBIENT TEMPERATURE AT A 52 EXPANDER TURBOCHARGER PRESSURE AT A5 DETERMINING PRESSURE. kg / m� PREFERABLY BETWEEN 421860 kg / m� AND 457015 kg / m� AND COOL THE TEMPERATURE TO LESS THAN -17.7�C, AND 2) REMOVE WORK FROM THE SUPPLY CURRENT DURING THE PRESSURE REDUCTION THROUGH THE EXPANDER ; B) FROM THE EXIT OF THE EXPANDER TO SUPPLY THE SUPPLY CURRENT TOWARDS THE REFRIGERATION CYCLE IN CASCADA, WHERE A HEAT EXCHANGE MUST BE MADE, PREFERENTLY METHANE AND A METHORETIC LANDFLOW OF THE GLOBAL LANDSWAY LOWER THAN -161,1�C

Liquefaction of natural gas

Process for cooling a product in a heat exchanger employing microchannels

This invention relates to a process for cooling or liquefying a fluid product (e.g., natural gas) in a heat exchanger, the process comprising: flowing a fluid refrigerant through a set of refrigerant microchannels in the heat exchanger; and flowing the product through a set of product microchannels in the heat exchanger, the product flowing through the product microchannels exchanging heat with the refrigerant flowing through the refrigerant microchannels, the product exiting the set of product microchannels being cooler than the product entering the set of product microchannels. The process has a wide range of applications, including liquefying natural gas.

Liquefaction method, liquefaction apparatus, and floating liquefied gas production facility equipped with the same

Parallel compression in lng plants using a double flow compressor

A system and method is provided for increasing the capacity and efficiency of natural gas liquefaction processes by debottlenecking the refrigerant compression system. A secondary compression circuit comprising at least one double flow compressor is provided in parallel fluid flow communication with at least a portion of a primary compression circuit.

Process components, containers, and pipes suitable for containing and transporting cryogenic temperature fluids

Se facilitan componentes de proceso, contenedores y tubos que se construyen a partir de aceros de aleación baja, de resistencia ultra alta, conteniendo menos de 9% en peso de níquel y teniendo resitencias a la tracción supeirores a 830 MPa (120 Ksi) y DBTTs inferiores a aproximadamente -73ºC (-100ºF).

Process for the production of a subcooled liquefied natural gas stream from a natural gas feed stream, and associated installation

A process for the production of a subcooled liquefied natural gas stream from a natural gas feed stream. Passing a first natural gas feed stream through a first heat exchanger for precooling by heat exchange with a first stream of gaseous refrigerant produced in a first refrigeration cycle comprising a first dynamic expansion turbine. Passing the precooled feed stream through a second heat exchanger for liquefying by heat exchange with a second stream of gaseous refrigerant produced in a second refrigeration cycle comprising a second dynamic expansion turbine. Passing the liquefied natural gas stream through a third heat exchanger for subcooling the liquefied gas by heat exchange with a third refrigerant stream produced in a third refrigeration cycle comprising a third dynamic expansion turbine separate from the first turbine and the second turbine. An installation includes devices for conveying the natural gas stream, the heat exchangers and the turbines and compression devices cooling the refrigerants for the heat exchangers.

Natural gas liquefaction process and system using the same

본 발명에 따른 천연가스 액화공정은 냉매를 응축하는 단계, 응축된 냉매를 주 냉매와 부 냉매로 분배하는 단계, 분배된 부 냉매를 팽창하는 단계, 팽창된 부 냉매를 주 냉매와 간접적으로 열교환시켜 주 냉매를 과냉각하는 단계, 과냉각된 주 냉매를 팽창하는 단계, 팽창된 주 냉매를 천연가스와 간접적으로 열교환시켜 천연가스를 냉각하는 단계, 및 천연가스와의 열교환에 의해 증발된 주 냉매를 압축수단에 의해 압축하는 단계를 각각 포함하는 복수 개의 폐 루프 냉동 사이클을 통해 천연가스를 액화시킨다. The natural gas liquefaction process according to the present invention comprises the steps of condensing the refrigerant, distributing the condensed refrigerant to the main refrigerant and the secondary refrigerant, expanding the distributed secondary refrigerant, indirect heat exchange with the primary refrigerant Supercooling the main refrigerant, expanding the subcooled main refrigerant, indirectly exchanging the expanded main refrigerant with natural gas to cool the natural gas, and compressing the main refrigerant evaporated by heat exchange with the natural gas. The natural gas is liquefied through a plurality of closed loop refrigeration cycles each comprising a step of compressing by.

COMPONENTS, CONTAINERS, AND PROCESSING PIPES SUITABLE FOR ACCORDING AND BRINGING CRYOGENIC TEMPERATURE FLUID

Patent RU2017142946A3

Process components, containers, and pipes suitable for containing and transporting cryogenic temperature fluids

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.

Method and apparatus for liquefaction of natural gas

A process and apparatus for liquefying a natural gas, having a pressure above about 800 psig, in which the natural gas is introduced into an expander which operates to reduce the pressure of the natural gas and extract work from the expansion of the natural gas during the pressure reduction so that the resulting effluent from the expander can be cooled to sequentially lower temperatures by passing the gas through a plurality of cooling stages, in indirect heat exchange with at least one refrigerant, until the gas is substantially completely condensed in the last of the cooling stages.

Semi-closed loop LNG process

A semi-closed loop system for producing liquefied natural gas (LNG) that combines certain advantages of closed-loop systems with certain advantages of open-loop systems to provide a more efficient and effective hybrid system. In the semi-closed loop system, the final methane refrigeration cycle provides significant cooling of the natural gas stream via indirect heat transfer, as opposed to expansion-type cooling. A minor portion of the LNG product from the methane refrigeration cycle is used as make-up refrigerant in the methane refrigeration cycle. A pressurized portion of the refrigerant from the methane refrigeration cycle is employed as fuel gas. Excess refrigerant from the methane refrigeration cycle can be recombined with the processed natural gas stream, rather than flared.

Primary loop start-up method for a high pressure expander process

A method is disclosed for start-up of a system for liquefying a feed gas stream comprising natural gas. The system has a feed gas compression and expansion loop, and a refrigerant system comprising a primary cooling loop and a sub-cooling loop. The feed gas compression and expansion loop is started up. The refrigerant system is pressurized. Circulation in the primary cooling loop is started and established. Circulation in the sub-cooling loop is started and established. A flow rate of the feed gas stream and circulation rates of the primary cooling loop and the sub-cooling loop are ramped up.

Compression train including one centrifugal compressor and lng plant

천연가스 액화 프로세스를 위한 압축 트레인. 압축 트레인은, 구동 기계 및, 상기 구동 기계에 의해 회전 구동되는 단지 하나의 원심형 압축기를 포함하고; 압축기는, 30 g/mol 미만의 분자량을 갖는 냉매 가스를 흡입 압력으로부터 토출 압력까지 압축하도록 구성되며; 토출 압력과 흡입 압력 사이의 비율은, 10 초과, 바람직하게 12 초과, 더욱 바람직하게 15 초과이다. LNG 플랜트는 본 발명에 따른 압축 트레인을 하나 이상 포함한다. Compression train for natural gas liquefaction process. The compression train comprises a drive machine and only one centrifugal compressor which is rotationally driven by said drive machine; the compressor is configured to compress the refrigerant gas having a molecular weight of less than 30 g/mol from a suction pressure to a discharge pressure; The ratio between the discharge pressure and the suction pressure is greater than 10, preferably greater than 12, more preferably greater than 15. An LNG plant comprises one or more compression trains according to the present invention.

Pretreatment, pre-cooling, and condensate recovery of natural gas by high pressure compression and expansion

A method and apparatus for producing liquefied natural gas (LNG) from a natural gas stream. Heavy hydrocarbons are removed from the natural gas stream in a separator to generate a bottom stream and a separated natural gas stream, which is used as a coolant in a heat exchanger to generate a pretreated natural gas stream. The pretreated natural gas stream is compressed and cooled to form a chilled pretreated natural gas stream, part of which forms a recycle stream to exchange heat with the separated natural gas stream in the heat exchanger, thereby generating a cooled recycle stream. The temperature and pressure of the cooled recycle stream are reduced. The cooled recycle stream is then separated into an overhead stream and a reflux stream, which is directed to the separator. The chilled pretreated gas stream is liquefied to form LNG.

Process for cooling a product in a heat exchanger employing microchannels

This invention relates to a process for cooling or liquefying a fluid product (e.g., natural gas) in a heat exchanger, the process comprising: flowing a fluid refrigerant through a set of refrigerant microchannels in the heat exchanger; and flowing the product through a set of product microchannels in the heat exchanger, the product flowing through the product microchannels exchanging heat with the refrigerant flowing through the refrigerant microchannels, the product exiting the set of product microchannels being cooler than the product entering the set of product microchannels. The process has a wide range of applications, including liquefying natural gas.

Method and system for production optimization

The disclosure provides a method and system for optimizing production of a natural gas liquefaction process, the method comprising the steps of: selecting at least one manipulated variable (MV) for controlling the liquefaction process; selecting at least one control variable (CV), the at least one control variable at least comprising liquefied natural gas (LNG) throughput; providing at least one model, each model providing a dependency of the at least one control variable (CV) on the at least one manipulated variable (MV); using the at least one model to estimate LNG throughput for at least one of the manipulated variables (MV);obtaining process data from the liquefaction process, the process data at least including observed values of LNG throughput; for combinations of the at least one manipulated variable and the at least one control variable, testing the interdependency thereof; creating a gain matrix based on said interdependencies; and using the gain matrix to optimize a process control system of the liquefaction process.

Turbocompressor train and method for operation thereof and natural gas liquefaction plant having the turbocompressor train

A turbo compressor train is provided. The turbo compressor train includes a turbo compressor unit and a drive assembly for driving the turbo compressor unit. The drive unit has a gas turbine and a generator and a steam turbine. The steam turbine may be coupled together with the generator to the turbo compressor unit and the gas turbine by means of a coupling device. The coupling device has an overrun coupling and a coupling exciter with which the overrun coupling may be taken from a disengaged condition to an active condition by engaging of the overrun coupling at synchronous speed of the gas turbine and the steam turbine and if the overrun coupling is engaged, disengages upon a speed increase to the steam turbine and generator so that the generator may be driven by the steam turbine at a higher speed than the turbocompressor unit by the gas turbine.

The liquefaction of natural gas

本发明公开了用于形成液化天然气(LNG)的系统和方法。该系统包括配置为使用第一氟碳化合物制冷剂急冷天然气的第一氟碳化合物制冷系统和配置为使用第二氟碳化合物制冷剂进一步急冷天然气的第二氟碳化合物制冷系统。该系统还包括配置为使用制冷剂冷却天然气以制备LNG的氮气制冷系统和配置为从LNG中除去氮气的氮气排出单元。作为选择性的实施方案，该氮气制冷系统可以被甲烷自制冷系统代替。

Compression train including one centrifugal compressor and LNG plant

Compression train for a natural gas liquefaction process. The compression train includes a driver machine and only one centrifugal compressor machine driven in rotation by the driver machine; the compressor is configured to compress a refrigerant gas with a molecular weight less than 30 g/mol from a suction pressure to a discharge pressure; the ratio between discharge and suction pressures is higher than 10. A LNG plant including a compression train.

Parallel compression in LNG plants using a double flow compressor

A system and method is provided for increasing the capacity and efficiency of natural gas liquefaction processes by debottlenecking the refrigerant compression system. A secondary compression circuit comprising at least one double flow compressor is provided in parallel fluid flow communication with at least a portion of a primary compression circuit.

Hybrid circuit for the liquefaction of natural gas

Refrigeration process for gas liquefaction which utilizes one or more vaporizing refrigerant cycles to provide refrigeration below about -40 DEG C and a gas expander cycle to provide refrigeration below about -100 DEG 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. <IMAGE>

Hydrogen-neon mixture refrigeration cycle for large-scale hydrogen cooling and liquefaction

The present invention relates to a refrigerant composition comprising neon and hydrogen. The present invention further relates to the use of the refrigerant composition in liquefying gaseous substances such as hydrogen or helium.

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 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.

Plural refrigerant tray type heat exchanger

A CORE TYPE HEAT EXCHANGER COMPRISING A PLURALITY OF PARALLEL, CONTIGUOUS AND SEPARATE PASSAGEWAYS POSITIONED IN AN INSULATED SHELL AND ARRANGED ONE ABOVE THE OTHER WITH THE BOTTOM OF ONE PASSAGEWAY CONSTITUTING THE TOP OF THE PASSAGEWAY IMMEDIATELY BELOW WHEREIN MEANS ARE PROVIDED FOR INTRODUCING REFRIGERANTS AT DIFFERENT TEMPERATURE LEVELS INTO PASSAGEWAYS IN COUNTERCURRENT FLOW RELATIONSHIP WITH RESPECT TO THE PROCESS STREAM BEING COOLED AT LOCI IN THE HEAT EXCHANGER CORRESPONDING TO THE TEMPERATURE LEVEL OF THE INDIVIDUAL REFRIGERANTS.

Process for liquefying natural gas

Es wird ein Verfahren zum Verflüssigen einer Kohlenwasserstoff-reichen Fraktion, insbesondere Erdgas, beschrieben, wobei – die Kohlenwasserstoff-reiche Fraktion gegen wenigstens zwei Kältekreisläufe abgekühlt und verflüssigt wird, – jeder der Kältekreisläufe wenigstens einen Kreislaufverdichter aufweist, und – der kälteste Kältekreislauf zwei hintereinander geschaltete Kreislaufverdichter, nämlich einen Nieder- und einen Hochdruck-Kreislaufverdichter aufweist. Erfindungsgemäß – werden mit Ausnahme des Hochdruck-Kreislaufverdichters (C4, C4') des kältesten Kältekreislaufs drehzahlgleiche Kreislaufverdichter (C1–C3, C1'–C3') verwendet, – werden die drehzahlgleichen Kreislaufverdichter (C1–C3, C1'–C3') von lediglich einer Gasturbine (GT) angetrieben, – wobei die Gasturbine (GT) wenigstens 70%, vorzugsweise wenigstens 75% der erforderlichen Gesamtantriebsleistung aller Kreislaufverdichter (C1–C4, C1'–C4') bereitstellt, und – wird der Hochdruck-Kreislaufverdichter (C4, C4') des kältesten Kältekreislaufs von einem elektrischen Motor (M2) oder einer Dampfturbine angetrieben. The invention relates to a process for liquefying a hydrocarbon-rich fraction, in particular natural gas, wherein - the hydrocarbon-rich fraction is cooled and liquefied against at least two refrigeration cycles, - each of the refrigeration cycles has at least one cycle compressor, and - the coldest refrigeration cycle is two consecutively connected Circulation compressor, namely a low and a high-pressure cycle compressor has. According to the invention - with the exception of the high-pressure cycle compressor (C4, C4 ') of the coldest refrigeration cycle speed equal circuit compressor (C1-C3, C1'-C3') is used - are the speed-equivalent cycle compressor (C1-C3, C1'-C3 ') of only one gas turbine (GT) driven, - wherein the gas turbine (GT) at least 70%, preferably at least 75% of the required total drive power of all cycle compressor (C1-C4, C1'-C4 ...

Process for cooling a product in a heat exchanger employing microchannels

This invention relates to a process for cooling or liquefying a fluid product (e.g., natural gas) in a heat exchanger, the process comprising: flowing a fluid refrigerant through a set of refrigerant microchannels in the heat exchanger; and flowing the product through a set of product microchannels in the heat exchanger, the product flowing through the product microchannels exchanging heat with the refrigerant flowing through the refrigerant microchannels, the product exiting the set of product microchannels being cooler than the product entering the set of product microchannels. The process has a wide range of applications, including liquefying natural gas.

Liquefaction method, liquefaction device, and floating liquefied gas production equipment comprising same

本发明提供一种能够在使被液化气液化时抑制液化效率下降，同时安全性优异且设备能够实现紧凑化的液化方法、液化装置及具备该液化装置的浮式液化气制造设备。特征在于，对于与单一成分的高压热介质进行了热交换后的被液化气进行减压后，使减压后的被液化气与温度比高压热介质低且与高压热介质为相同种类的低温侧热介质进行热交换而发生液化。

Artic cascade method for natural gas liquefaction in a high-pressure cycle with pre-cooling by ethane and sub-cooling by nitrogen, and a plant for its implementation

The invention relates to technology for liquefying natural gas. A method for liquefying natural gas consists in that processed natural gas is pre-cooled, ethane is separated off, the gas being liquefied is supercooled with the use of cooled nitrogen as a refrigerant, the pressure of the gas being liquefied is reduced, non-liquefied gas is separated off and liquefied natural gas is discharged. Furthermore, prior to the pre-cooling, the natural gas is compressed, ethane is separated off in a process of multi-stage pre-cooling of the gas being liquefied, with simultaneous evaporation of ethane with the use of cooled ethane as a refrigerant. The ethane produced during the evaporation is compressed, condensed and used as a refrigerant during the cooling of the gas being liquefied and of the nitrogen, wherein the nitrogen is compressed, cooled, expanded and fed to the stage of supercooling of the natural gas. The invention simplifies the technological process of liquefying natural gas.

Process and apparatus for producing condensed natural gas