СПОСОБ ОХЛАЖДЕНИЯ МНОГОКОМПОНЕНТНЫМ ХЛАДАГЕНТОМ ДЛЯ СЖИЖЕНИЯ ПРИРОДНОГО ГАЗА

FIELD: process for liquefying methane-enriched flow of compressed gas. SUBSTANCE: gas flow is liquefied in heat exchanger cooled by means of refrigeration machine with multicomponent cooling agent operating in closed cycle for production of methane-enriched liquid product having temperature higher than -112 C and pressure sufficient to provide temperature of liquid product equal to boiling start point or lower than it. Then liquefied gaseous product is placed in reservoir for storing it at temperature higher than -112 C. EFFECT: enhanced efficiency of gas liquefying. 21 cl, 1 note, 7 tbl, 10 dwg

СПОСОБ ОБРАТНОГО СЖИЖЕНИЯ БОГАТОЙ МЕТАНОМ ФРАКЦИИ

Заявлен способ обратного сжижения богатой метаном фракции, в частности испаренного газа. При этом богатую метаном фракцию сжимают до давления, которое по меньшей мере на 20% превышает критическое давление подлежащей сжатию фракции, сжижают и переохлаждают. Далее разгружают до давления между 5 и 20 бар и разделяют на газообразную богатую азотом фракцию и жидкую обедненную азотом фракцию. Обедненную азотом фракцию разгружают до давления между 1,1 и 2,0 бар, при этом получающуюся газообразную фракцию без нагревания и сжатия подмешивают в богатую метаном фракцию. Получающаяся при разгрузке бедная азотом жидкая фракция продукта имеет содержание азота ≤1,5 мол.%. 4 з.п. ф-лы, 1 ил.

СПОСОБ ОЖИЖЕНИЯ ПРИРОДНОГО ГАЗА ПУТЕМ ОХЛАЖДЕНИЯ ЗА СЧЕТ РАСШИРЕНИЯ

FIELD: the invention refers to the mode of liquefaction of a flow of compressed gas rich in methane. SUBSTANCE: at the first stage of the process the first fraction of the flow of the compressed fed gas is set aside preferably at the pressure more than 11000 kPa and its entropic expansion until to more lower pressure is made for cooling and at least to partial liquefaction of the set aside first fraction. The multistep expansion of the second fraction is made until to more lower pressure. At that at least partially the second fraction of the gas flow is liquefied. The liquefied second fraction is removed out of the process as a flow of compressed air at the temperature of more than -112°C and the pressure equal to the pressure at the point of beginning of boiling and higher. EFFECT: the invention allows to improve the mode of liquefaction of natural gas. 24 cl, 6 dwg, 1 tbl, 1 ex ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (51) ÌÏÊ 7 (11) 2 253 809 (13) C2 F 25 J 1/00 ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (21), (22) Çà âêà: 2002118819/06, 12.12.2000 (72) Àâòîð(û): ÌÈÍÒÀ Ìîóçèñ (US), ÁÎÓÝÍ Ðîíàëüä Ð. (US), ÑÒÎÓÍ Äæîí Á. (US) (24) Äàòà íà÷àëà äåéñòâè ïàòåíòà: 12.12.2000 (30) Ïðèîðèòåò: 17.12.1999 US 60/172,548 (45) Îïóáëèêîâàíî: 10.06.2005 Áþë. ¹ 16 (85) Äàòà ïåðåâîäà çà âêè PCT íà íàöèîíàëüíóþ ôàçó: 17.07.2002 (86) Çà âêà PCT: US 00/33737 (12.12.2000) 2 2 5 3 8 0 9 R U Àäðåñ äë ïåðåïèñêè: 129010, Ìîñêâà, óë. Á.Ñïàññêà , 25, ñòð.3, ÎÎÎ "Þðèäè÷åñêà ôèðìà Ãîðîäèññêèé è Ïàðòíåðû", ïàò.ïîâ. Ã.Á. Åãîðîâîé C 2 C 2 (87) Ïóáëèêàöè PCT: WO 01/44735 (21.06.2001) (54) ÑÏÎÑÎÁ ÎÆÈÆÅÍÈß ÏÐÈÐÎÄÍÎÃÎ ÃÀÇÀ ÏÓÒÅÌ ÎÕËÀÆÄÅÍÈß ÇÀ Ñ×ÅÒ ÐÀÑØÈÐÅÍÈß (57) Ðåôåðàò: îæèæàþò âòîðóþ ôðàêöèþ ïîòîêà ãàçà. Îæèæåííóþ Èçîáðåòåíèå îòíîñèòñ ê ñïîñîáó äë îæèæåíè âòîðóþ ôðàêöèþ îòâîä ò èç ïðîöåññà êàê ïîòîê ïîòîêà ñæàòîãî ãàçà, áîãàòîãî ìåòàíîì. Íà ïåðâîé ñæàòîãî ïðîäóêòà, èìåþùèé òåìïåðàòóðó ñòàäèè ïðîöåññà îòâîä ò ïåðâóþ ôðàêöèþ ïîòîêà âûøå - ...

СПОСОБ (ВАРИАНТЫ) И УСТРОЙСТВО (ВАРИАНТЫ) ДЛЯ ПОЛУЧЕНИЯ ОБЕДНЕННОГО АЗОТОМ ПРОДУКТА СПГ

Изобретение относится к сжижению потока сырьевого природного газа и удалению из него азота с получением обедненного азотом продукта LNG. Поток сырьевого природного газа проходит через главный теплообменник с получением первого потока LNG, который отделяется с образованием обедненного азотом продукта LNG и потока рецикла, состоящего из обогащенных азотом паров природного газа. Поток рецикла проходит через главный теплообменник с получением первого потока LNG, отдельно от потока сырьевого природного газа и параллельно с ним, с получением первого, по меньшей мере, частично сжиженного обогащенного азотом потока природного газа, который разделяется с получением обогащенного азотом парообразного продукта. Техническим результатом является повышение степени извлечения азота из природного газа. 4 н. и 60 з.п. ф-лы, 11 ил., 2 табл.

Patent RU2019112456A3

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2019 112 456 A (51) МПК F25J 1/02 (2006.01) F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2019112456, 24.04.2019 (71) Заявитель(и): ЭР ПРОДАКТС ЭНД КЕМИКАЛЗ, ИНК. (US) Приоритет(ы): (30) Конвенционный приоритет: 27.04.2018 US 15/964,377 Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" Стр.: 1 A 2 0 1 9 1 1 2 4 5 6 R U A (57) Формула изобретения 1. Способ сжижения сырьевого потока природного газа с получением готового СПГ, причем способ включает в себя: (a) пропускание первого сырьевого потока природного газа через и охлаждение первого сырьевого потока природного газа на теплой стороне части из множества секций или всех из множества секций теплообменника, таким образом, чтобы предварительно охлаждать и сжижать первый сырьевой поток природного газа, причем множество секций теплообменника включает в себя первую секцию теплообменника, в которой поток природного газа предварительно охлаждается, и вторую секцию теплообменника, в которой поток предварительно охлажденного природного газа из первой секции теплообменника сжижают с получением первого потока сжиженного природного газа; (b) мгновенное испарение первого потока сжиженного природного газа, отводимого из второй секции теплообменника, с образованием газа мгновенного испарения и готового СПГ, и отделение газа мгновенного испарения от готового СПГ таким образом, чтобы получить поток газа мгновенного испарения и поток готового СПГ; (c) сжатие потока газа мгновенного испарения и рециркуляцию сжатого газа мгновенного испарения обратно в первый сырьевой поток природного газа; (d) циркуляцию метансодержащего хладагента в контуре охлаждения, включающем в себя множество секций теплообменника, компрессорную линию, содержащую множество компрессоров и/или ступеней сжатия и один или большее количество промежуточных охладителей и/или выходных охладителей, ...

Patent RU2018132187A3

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2018 132 187 A (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2018132187, 10.09.2018 (71) Заявитель(и): ЭР ПРОДАКТС ЭНД КЕМИКАЛЗ, ИНК. (US) Приоритет(ы): (30) Конвенционный приоритет: 13.09.2017 US 15/703,321 Адрес для переписки: 129090, Москва, ул. Большая Спасская, д. 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" Стр.: 1 A 2 0 1 8 1 3 2 1 8 7 R U A (57) Формула изобретения 1. Способ охлаждения и сжижения по меньшей мере двух сырьевых потоков в витом теплообменнике, причем способ включает в себя: (a) подачу по меньшей мере двух сырьевых потоков в теплый конец витого теплообменника, причем по меньшей мере два сырьевых потока включают в себя первый сырьевой поток с первой нормальной температурой образования пузырьков и второй сырьевой поток со второй нормальной температурой образования пузырьков, которая ниже первой нормальной температуры образования пузырьков; (b) охлаждение путем непрямого теплообмена с хладагентом в витом теплообменнике по меньшей мере первой части каждого из первого сырьевого потока и второго сырьевого потока с получением по меньшей мере двух охлажденных сырьевых потоков, включающих в себя первый охлажденный сырьевой поток и второй охлажденный сырьевой поток; (с) отведение по меньшей мере двух охлажденных сырьевых потоков из холодного конца витого теплообменника при по существу одинаковой температуре отведения, (d) обеспечение по меньшей мере двух потоков продукта, причем каждый из по меньшей мере двух потоков продукта находится на выходе и гидравлически соединен по меньшей мере с одним из двух охлажденных сырьевых потоков, и, при этом, каждый из по меньшей мере двух потоков продукта поддерживается в заданном диапазоне температур потока продукта с заданной температурой потока продукта, причем по меньшей мере два потока продукта включают в себя первый поток продукта и второй поток продукта, а заданная температура ...

СПОСОБ ОЖИЖЕНИЯ ПРИРОДНОГО ГАЗА ПУТЕМ ОХЛАЖДЕНИЯ ЗА СЧЕТ РАСШИРЕНИЯ

... 1. Способ сжижения потока сжатого газа, богатого метаном, включающий следующие стадии: (a) отвод первой фракции потока сжатого газа и обеспечение энтропического расширения отведенной первой фракции до более низкого давления для охлаждения и по меньшей мере частичного ожижения отведенной первой фракции, (b) охлаждение второй фракции потока сжатого газа посредством непрямого теплообмена с расширенной первой фракцией; (c) обеспечение расширения второй фракции потока сжатого газа до более низкого давления, при этом по меньшей мере частично ожижают вторую фракцию потока сжатого газа, и (d) удаление сжиженной второй фракции из процесса как поток сжатого продукта, имеющего температуру выше -112°С (-170°F) и давление, равное давлению в точке начала кипения или выше него. 2. Способ по п.1, в котором поток сжатого газа имеет давление выше 11032 кПа (1600 psia). 3. Способ по п.1, в котором охлаждение второй фракции первой фракцией производят в одном или более теплообменников. 4. Способ по п.1, который ...

СПОСОБ И УСТРОЙСТВО ДЛЯ ПОЛУЧЕНИЯ ОХЛАЖДЕННОГО ПОТОКА УГЛЕВОДОРОДОВ

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

СПОСОБ И СИСТЕМА ДЛЯ СЖИЖЕНИЯ НЕСКОЛЬКИХ СЫРЬЕВЫХ ПОТОКОВ

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2018 132 187 A (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2018132187, 10.09.2018 (71) Заявитель(и): ЭР ПРОДАКТС ЭНД КЕМИКАЛЗ, ИНК. (US) Приоритет(ы): (30) Конвенционный приоритет: 13.09.2017 US 15/703,321 Адрес для переписки: 129090, Москва, ул. Большая Спасская, д. 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" Стр.: 1 A 2 0 1 8 1 3 2 1 8 7 R U A (57) Формула изобретения 1. Способ охлаждения и сжижения по меньшей мере двух сырьевых потоков в витом теплообменнике, причем способ включает в себя: (a) подачу по меньшей мере двух сырьевых потоков в теплый конец витого теплообменника, причем по меньшей мере два сырьевых потока включают в себя первый сырьевой поток с первой нормальной температурой образования пузырьков и второй сырьевой поток со второй нормальной температурой образования пузырьков, которая ниже первой нормальной температуры образования пузырьков; (b) охлаждение путем непрямого теплообмена с хладагентом в витом теплообменнике по меньшей мере первой части каждого из первого сырьевого потока и второго сырьевого потока с получением по меньшей мере двух охлажденных сырьевых потоков, включающих в себя первый охлажденный сырьевой поток и второй охлажденный сырьевой поток; (с) отведение по меньшей мере двух охлажденных сырьевых потоков из холодного конца витого теплообменника при по существу одинаковой температуре отведения, (d) обеспечение по меньшей мере двух потоков продукта, причем каждый из по меньшей мере двух потоков продукта находится на выходе и гидравлически соединен по меньшей мере с одним из двух охлажденных сырьевых потоков, и, при этом, каждый из по меньшей мере двух потоков продукта поддерживается в заданном диапазоне температур потока продукта с заданной температурой потока продукта, причем по меньшей мере два потока продукта включают в себя первый поток продукта и второй поток продукта, а заданная температура ...

СПОСОБ ОЖИЖЕНИЯ ПРИРОДНОГО ГАЗА ДЛЯ ПОЛУЧЕНИЯ СЖИЖЕННОГО ПРИРОДНОГО ГАЗА

... 1. Способ ожижения газового потока, имеющего высокое содержание метана, при котором ! обеспечивают упомянутый газовый поток под давлением ниже 1000 фунт/кв.дюйм; ! обеспечивают хладагент под давлением ниже 1000 фунт/кв.дюйм; ! сжимают упомянутый хладагент до давления свыше или равного 1500 фунт/кв.дюйм, чтобы обеспечить сжатый хладагент; ! охлаждают упомянутый сжатый хладагент косвенным теплообменом с охлаждающей текучей средой; ! расширяют упомянутый сжатый хладагент для дальнейшего охлаждения упомянутого сжатого хладагента, тем самым получая расширенный, охлажденный хладагент; ! направляют упомянутый расширенный, охлажденный хладагент в теплообменную зону; и ! пропускают упомянутый газовый поток через упомянутую теплообменную зону, чтобы охладить, по меньшей мере, часть упомянутого газового потока косвенным теплообменом с упомянутым расширенным, охлажденным хладагентом, в результате чего формируют охлажденный газовый поток. ! 2. Способ по п.1, при котором обеспечение хладагента под давлением ...

Способ сжижения и устройство для переработки газа (варианты)

Verfahren zum Abtrennen von Stickstoff aus Erdgas

Es wird ein Verfahren zum Verflüssigen einer kohlenwasserstoffreichen, stickstoffenthaltenden Einsatzfraktion, vorzugsweise Erdgas, beschrieben. Erfindungsgemäß wird a) die Einsatzfraktion (1) verflüssigt (E1, E2), b) rektifikatorisch (T1) in eine stickstoffangereicherte Fraktion (9), deren Methangehalt max. 1 Vol.-% beträgt, und eine kohlenwasserstoffreiche, stickstoffabgereicherte Fraktion (4) aufgetrennt, c) die kohlenwasserstoffreiche, stickstoffabgereicherte Fraktion (4) unterkühlt (E3) und entspannt (b), d) die entspannte kohlenwasserstoffreiche, stickstoffabgereicherte Fraktion (5) in eine kohlenwasserstoffreiche Fraktion (6), deren Stickstoffgehalt max. 1 Vol.-% beträgt, und eine stickstoffreiche Fraktion (7) aufgetrennt (D1), und e) die stickstoffreiche Fraktion (7) der Einsatzfraktion (1) zugemischt.

LNG formation

LNG formation

Method for utilization of lean boil-off gas streamas a refrigerant source.

Process for liquefying natural gas by expansion cooling.

Enhanced NGL recovery utilizing refrigeration and reflux from LNG plants.

The present invention is directed to methods and apparatus for improving the recovery of the relatively less volatile components from a methane-rich gas feed under pressure to produce an NGL product while, at the same time, separately recovering the relatively more volatile components which are liquified to produce an LNG product. The methods of the present invention improve separation and efficiency within the NGL recovery column while maintaining column pressure to achieve efficient and economical utilization of the available mechanical refrigeration. The methods of the present invention are particularly useful for removing cyclohexane, benzene and other hazardous, heavy hydrocarbons from a gas feed. The benefits of the present invention are achieved by the introduction to the NGL recovery column of an enhanced liquid reflux lean on the NGL components. Further advantages can be achieved by thermally linking a side reboiler for the NGL recovery column with the overhead condenser for the NGL purifying column. Using the methods of the present invention, recoveries of propane and heavier components in excess of 95% are readily achievable.

Deep flash Ling cycle.

Improved multi-component refrigeration process forliquefaction of natural gas

LNG formation

Method for utilization of lean boil-off gas streamas a refrigerant source.

HYBRID CYCLE FOR THE PRODUCTION OF LIQUID NATURAL GAS

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.

METHOD AND SYSTEM FOR COOLING A HYDROCARBON STREAM USING A GAS PHASE REFRIGERANT

Described herein are methods and systems for the liquefaction of a natural gas feed stream using a refrigerant comprising methane. The methods and systems use a refrigeration circuit and cycle that employs two or more turbo-expanders to expand two 5 or more streams of gaseous refrigerant down to different pressures to provide cold streams of at least predominantly gaseous refrigerant at different pressures that are used to provide refrigeration for precooling and liquefying the natural gas. The resulting liquefied natural gas stream is then flashed to produce an LNG product and a flash gas, the flash gas being recycled to the natural gas feed stream.

Method and apparatus for producing a cooled hydrocarbon stream

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.

Mixed refrigerant liquefaction system and method

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

METHOD FOR SUB-COOLING A NORMALLY GASEOUS HYDROCARBON MIXTURE

MULTIPLE PRESSURE MIXED REFRIGERANT COOLING PROCESS

Systems and methods described for increasing capacity and efficiency of natural gas liquefaction processes having a mixed refrigerant precooling system with multiple pressure levels comprising cooling the compressed mixed refrigerant stream and separating the cooled compressed mixed refrigerant stream into a vapor and liquid portion. The liquid portion provides refrigeration duty to a first precooling heat exchanger. The vapor portion is further compressed, cooled, and condensed, and used to provide refrigeration duty to a second precooling heat exchanger. A flash gas separated from the liquefied natural gas is warmed and combined with the natural gas feed stream.

MULTI-PRODUCT LIQUEFACTION METHOD AND SYSTEM

A liquefaction system is capable of sequentially or simultaneously liquefying multiple feed streams of hydrocarbons having different normal bubble points with minimal flash. The liquefying heat exchanger has separate circuits for handling multiple feed streams. The feed stream with the lowest normal boiling point is sub-cooled sufficiently to suppress most of the flash. Feed streams with relatively high normal boiling points are cooled to substantially the same temperature, then blended with bypass streams to maintain each product near its normal bubble point. The system can also liquefy one stream at a time by using a dedicated circuit or by allocating the same feed to multiple circuits.

METHOD AND DEVICE FOR LIQUEFACTION OF METHANE

The invention relates to a method for liquefying methane and for filling a vessel (2) with the liquefied methane, said method comprising: a step of liquefying methane comprising an operation of cooling the methane to the saturation temperature thereof; a step of filling the vessel with the liquefied methane; and a step of injecting the vaporised methane back into the liquefying circuit.

INTEGRATED PROCESS FOR NGL (NATURAL GAS LIQUIDS RECOVERY) AND LNG (LIQUEFACTION OF NATURAL GAS)

The invention relates to an integrated process and apparatus for liquefaction of natural gas and recovery of natural gas liquids. In particular, the improved process and apparatus reduces the energy consumption of a Liquefied Natural Gas (LNG) unit by using a portion of the already cooled overhead vapor from a fractionation column from an NGL (natural gas liquefaction) unit to, depending upon composition, provide, for example, reflux for fractionation in the NGL unit and/or a cold feed for the LNG unit, or by cooling, within the NGL unit, a residue gas originating from a fractionation column of the NGL unit and using the resultant cooled residue gas to, depending upon composition, provide, for example, reflux/feed for fractionation in the NGL and/or a cold feed for the LNG unit, thereby reducing the energy consumption of the LNG unit and rendering the process more energy-efficient.

METHOD AND APPARATUS FOR LIQUEFYING NATURAL GAS

Le procédé de liquéfaction d'un gaz naturel selon l'invention consiste à liquéfier au moins en partie ce gaz en le détendant avec fourniture d'énergi e mécanique, le gaz au cours de cette détente passant d'une phase dense à une phase liquide sans transition de phase. Le procédé comporte au moins les deu x étapes suivantes: a) on refroidit le gaz naturel constitué de plusieurs constituants à une pression au moins supérieure ou égale à la valeur de pression critique du méthane et à une température telle que ledit gaz se présente en phase dense à la fin de ce refroidissement, b) on détend et on liquéfie au moins en partie une fraction de ladite phase dense provenant de l'étape a) à travers un dispositif (T3) adapté à diminuer la pression du gaz selon une détente avec fourniture d'énergie mécanique, le passage de l'état en phase dense vers un état en phase liquide se faisant sensiblement sans transition de phase.

CRYOGENIC INDUSTRIAL GAS LIQUEFACTION WITH HYBRID REFRIGERATION GENERATION

A method for liquefying an industrial gas wherein a portion of the requisite refrigeration is generated by a multicomponent refrigerant circuit and a portion is generated by turboexpansion of either a portion of the industrial gas or a portion of the multicomponent refrigerant.

Multi-component cooling procedure for the liquefaction of natural gas.

METHOD OF FORMATION OF LIQUEFIED NATURAL GAS

СПОСОБ ПОЛУЧЕНИЯ ПОТОКОВ ЖИДКОГО И ГАЗООБРАЗНОГО АЗОТА, ГАЗОВОГО ПОТОКА С ВЫСОКИМ СОДЕРЖАНИЕМ ГЕЛИЯ И ДЕАЗОТИРОВАННОГО ПОТОКА УГЛЕВОДОРОДОВ И УСТАНОВКА ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

Этот способ содержит следующие стадии: поток подачи (72) охлаждают внутри входного теплообменника (28). Охлажденный поток (76) подачи вводят во фракционирующую колонну (50) и в донной части колонны (50) отбирают деазотированный поток углеводородов. Поток (106) с высоким содержанием азота, выходящий из головной части колонны (50), вводят в сепаратор (60) и отбирают головной газовый поток из сепаратора (60) для получения потока (20) с высоким содержанием гелия. Жидкий поток (110), выходящий из донной части первого сепаратора (60), разделяют на жидкий поток (18) азота и на первый поток (114) флегмы, который вводят в виде флегмы в головную часть фракционирующей колонны (50).

СПОСОБ ПОЛУЧЕНИЯ ПОТОКОВ ЖИДКОГО И ГАЗООБРАЗНОГО АЗОТА, ГАЗОВОГО ПОТОКА С ВЫСОКИМ СОДЕРЖАНИЕМ ГЕЛИЯ И ДЕАЗОТИРОВАННОГО ПОТОКА УГЛЕВОДОРОДОВ И УСТАНОВКА ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

Этот способ содержит следующие стадии: поток подачи (72) охлаждают внутри входного теплообменника (28). Охлажденный поток (76) подачи вводят во фракционирующую колонну (50) и в донной части колонны (50) отбирают деазотированный поток углеводородов. Поток (106) с высоким содержанием азота, выходящий из головной части колонны (50), вводят в сепаратор (60) и отбирают головной газовый поток из сепаратора (60) для получения потока (20) с высоким содержанием гелия. Жидкий поток (110), выходящий из донной части первого сепаратора (60), разделяют на жидкий поток (18) азота и на первый поток (114) флегмы, который вводят в виде флегмы в головную часть фракционирующей колонны (50).

СПОСОБ ОБРАБОТКИ ПОТОКА СПГ, ПОЛУЧЕННОГО ОХЛАЖДЕНИЕМ ПРИ ПОМОЩИ ПЕРВОГО ЦИКЛА ОХЛАЖДЕНИЯ, И СООТВЕТСТВУЮЩАЯ УСТАНОВКА

Согласно способу поток (11) СПГ охлаждают охлаждающей текучей средой (83) в первом теплообменнике (19). Охлаждающая текучая среда (83) проходит через второй полуоткрытый цикл (21) охлаждения, независимый от первого цикла (15). Способ содержит стадию введения переохлажденного потока (59) СПГ в дистилляционную колонну (49) и стадию извлечения газового потока (69) в головной части колонны (49). Второй цикл (21) охлаждения содержит стадию получения потока (73) охлаждающей текучей среды из части головного газового потока (69), стадию сжатия потока (73) охлаждающей текучей среды до низкого давления, затем стадию расширения части (81) потока (75) сжатой охлаждающей текучей среды для получения в основном жидкого потока (83) переохлаждения. В основном жидкий поток (83) испаряется в первом теплообменнике (19).

Method for Liquefaction of Natural Gas by Multi-Component Refrigerant

Low temp liquefying industrial gas by mixed refrigeration

一种液化工业气体的方法,其中所需的部分冷量由多组分制冷剂循环产生,部分冷量通过或者使一部分工业气体或者一部分多组分制冷剂透平膨胀来产生。

PROCESS OF LIQUEFACTION PARTIAL Of a FLUID CONTAINING OF HYDROCARBONS TELQUE OF Natural gas

METHOD AND DEVICE FOR LIQUEFYING AND TREATING A NATURAL GAS

On liquéfie un fluide formé au moins en partie d'un mélange d'hydrocarbures en effectuant les étapes suivantes: - on refroidit le mélange sous pression de façon à le condenser au moins partiellement pour produire une phase liquide et une phase gazeuse et, simultanément on réalise la mise en contact au moins en partie à contre-courant, d'une fraction au moins de chacune desdites phases pour obtenir par transfert de matière une phase gazeuse enrichie en hydrocarbures légers et une première phase liquide enrichie en hydrocarbures lourds, et - on sépare les deux phases ainsi obtenues et on envoie la phase gazeuse enrichie en hydrocarbures légers à une seconde étape de réfrigération pour obtenir une deuxième phase liquide enrichie en hydrocarbures légers.

METHOD FOR LIQUEFYING A NATURAL GAS STREAM CONTAINING NITROGEN

GAS EXPANSION PROCESS AND STORAGE OF A LIQUEFIED NATURAL GAS STREAM FROM A DEVICE FOR LIQUEFYING NATURAL GAS, AND RELATED INSTALLATION

Le procédé comprend les étapes suivantes : - mélange d'un flux gazeux de gaz de flash (48) et d'un flux gazeux de gaz d'évaporation (52) pour former un courant gazeux de mélange (54); - compression du courant gazeux de mélange (54) dans au moins un appareil de compression (30) pour former un courant de gaz combustible comprimé (32) ; - prélèvement d'un courant de dérivation (36) dans le courant de gaz combustible comprimé (32) ; - compression du courant de dérivation (36) dans au moins un compresseur aval (34); - refroidissement et détente du courant de dérivation comprimé (66) ; - réchauffage d'au moins un premier flux (68 ; 70) issu du courant de dérivation détendu (68) dans au moins un échangeur thermique aval (40), - réintroduction du premier flux (68 ; 70) réchauffé dans le courant gazeux de mélange (54) en amont de l'appareil de compression (30).

METHOD FOR THE LIQUEFACTION OF NATURAL GAS

Method of liquefying natural gas

A method of producing a methane-rich liquid stream from a stream of natural gas predominantly consisting of methane and also containing nitrogen, entailing: (a) supplying said natural gas stream at a pressure above atmospheric pressure, (b) cooling and liquefying said natural gas stream using one or more refrigeration cycles, and (c) expanding said liquefied natural gas to lower pressure in two or more stages in series, phase separating the gas and liquid phases produced during the expansion, thereby concentrating the nitrogen into the vapor phase, and producing a methane-rich liquefied natural gas.

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.

Natural gas liquefaction process

A gas processing facility for the liquefaction of a natural gas feed stream is provided. The facility comprises a gas separation unit having at least one fractionation vessel. The gas separation unit employs adsorbent beds for adsorptive kinetic separation. The adsorbent beds release a methane-rich gas feed stream. The facility also includes a high-pressure expander cycle refrigeration system. The refrigeration system compresses the methane-rich gas feed stream to a pressure greater than about 1,000 psia. The refrigeration system also chills the methane-rich gas feed stream in one or more coolers, and then expands the chilled gas feed stream to form a liquefied product stream. Processes for liquefying a natural gas feed stream using AKS and a high-pressure expander cycle refrigeration system are also provided herein. Such processes allow for the formation of LNG using a facility having less weight than conventional facilities.

Production of liquefied natural gas

HYBRID CYCLE FOR THE LIQUEFACTION OF NATURAL GAS

VERBESSERTES MULTIKOMPONENTEN-KÜHLUNGSVERFAHREN ZUR VERFLÜSSIGUNG VON ERDGAS

VERBESSERTES MULTIKOMPONENTEN-KÜHLUNGSVERFAHREN ZUR VERFLÜSSIGUNG VON ERDGAS

Method for producing liquid and gaseous nitrogen streams, a helium-rich gaseous stream, and a denitrogened hydrocarbon stream, and associated plant

Low pressure ethane liquefaction and purification from a high pressure liquid ethane source

A plant and process are used to liquefy and purify a high pressure ethane feed stream. The plant includes a cascaded refrigeration system that refrigerates the ethane feed stream. The refrigeration system includes a propylene circuit, an ethylene circuit and a mixed refrigerant circuit. The mixed refrigerant circuit includes a refrigerant that includes ethane and methane. The plant includes a demethanizer that is configured to remove methane and other natural gas liquids from the refrigerated ethane stream.

Low pressure ethane liquefaction and purification from a high pressure liquid ethane source

A plant and process are used to liquefy and purify a high pressure ethane feed stream. The plant includes a cascaded refrigeration system that refrigerates the ethane feed stream. The refrigeration system includes a propylene circuit, an ethylene circuit and a mixed refrigerant circuit. The mixed refrigerant circuit includes a refrigerant that includes ethane and methane. The plant includes a demethanizer that is configured to remove methane and other natural gas liquids from the refrigerated ethane stream.

MULTI-PRODUCT LIQUEFACTION METHOD AND SYSTEM

A liquefaction system is capable of sequentially or simultaneously liquefying multiple feed streams of hydrocarbons having different normal bubble points with minimal flash. The liquefying heat exchanger has separate circuits for handling multiple feed streams. The feed stream with the lowest normal boiling point is sub-cooled sufficiently to suppress most of the flash. Feed streams with relatively high normal boiling points are cooled to substantially the same temperature, then blended with bypass streams to maintain each product near its normal bubble point. The system can also liquefy one stream at a time by using a dedicated circuit or by allocating the same feed to multiple circuits. LO) LO co LO) C%4 CD) coc Cv) ...

Method for producing pure nitrogen from a natural gas stream containing nitrogen

The invention relates to a method for liquefying a natural gas stream, comprising the following steps: a): cooling the input gas stream in order to obtain a liquefied natural gas stream at a temperature T1; b): injecting the stream resulting from step a) into a denitrogenation column at a pressure P2 and a temperature T2 lower than T1 in order to produce, at the bottom of said column, a denitrogenated liquefied natural gas stream and, at the top, a stream of nitrogen-enriched steam; c): condensing the stream of nitrogen-enriched steam resulting from step b) in a heat exchanger; d): injecting the stream resulting from step c) into a phase-separating pot so as to produce a liquid stream and a nitrogen-enriched gas stream; e): injecting the gas stream resulting from step d) into a distillation column at the pressure P2 producing, at the top, a nitrogen-enriched stream containing less than 1% of methane and, at the bottom, a liquid stream containing less than 10% of nitrogen; characterised ...

Method and apparatus for removing nitrogen from a cryogenic hydrocarbon composition

... - 45 A B S T R A C T METHOD AND APPARATUS FOR REMOVING NITROGEN FROM A CRYOGENIC HYDROCARBON COMPOSITION Nitrogen is removed from a cryogenic hydrocarbon 5 composition comprising nitrogen and a methane-containing liquid phase. A by-product vapour from the cryogenic hydrocarbon composition, at a low pressure of between 1 and 2 bar absolute, is compressed to a separation pressure in the range of between 2 and 15 bar absolute. 10 The such compressed vapour is partially liquefied by heat exchanging the compressed vapour against an auxiliary refrigerant stream and thereby passing heat from the compressed vapour to the auxiliary refrigerant stream at a cooling duty. The condensed fraction of the partially 15 liquefied compressed vapour is depressurized and at least a portion of it is reinjected into the cryogenic hydrocarbon composition. An off gas consisting of a, non condensed, vapour fraction of the partially liquefied compressed vapour is discharged from the first gas/liquid 20 separator.

Natural gas liquefaction process

A gas processing facility for the liquefaction of a natural gas feed stream is provided. The facility comprises a gas separation unit having at least one fractionation vessel. The gas separation unit employs adsorbent beds for adsorptive kinetic separation. The adsorbent beds release a methane-rich gas feed stream. The facility also includes a high-pressure expander cycle refrigeration system. The refrigeration system compresses the methane-rich gas feed stream to a pressure greater than about 1,000 psia. The refrigeration system also chills the methane-rich gas feed stream in one or more coolers, and then expands the chilled gas feed stream to form a liquefied product stream. Processes for liquefying a natural gas feed stream using AKS and a high-pressure expander cycle refrigeration system are also provided herein. Such processes allow for the formation of LNG using a facility having less weight than conventional facilities.

PROCESS FOR MAKING PRESSURIZED LIQUEFYING NATURAL GAS FROM PRESSURIZED NATURAL GAS USING EXPANSION COOLING

This invention relates to process for liquefying a pressurized gas stream rich in methane. In a first step of the process, a first fraction (13) of a pressurized feed stream, preferably at a pressure above 11,000 kPa, is withdrawn and entropically expanded (70) to a lower pressure to cool and at least partially liquefy the withdrawn first fraction. A second fraction (12) of the feed stream is cooled by indirect heat exchange (61) with the expanded first fraction (15). The second fraction (17) is subsequently expanded (72) to a lower pressure, thereby at least partially liquefying the second fraction (17) of the gas stream. The liquefied second fraction (37) is withdrawn from the process as a pressurized product stream having a temperature above -112 .degree.C and a pressure at or above its bubble point pressure.

NATURAL GAS LIQUEFACTION PROCESS FOR LNG

Embodiments of this invention relate to a process for liquefaction of natural gas and other methane-rich gas streams, and more particularly to a process for producing liquefied natural gas (LNG). In a first step of the process, a first fraction of the feed gas is withdrawn, compressed to a pressure greater than or equal to 1500 psia, cooled and expanded to a lower pressure to cool the withdrawn first fraction. The remaining fraction of the feed stream is cooled by indirect heat exchange with the expanded first fraction in a first heat exchange process. In a second step a separate stream comprising flash vapor is compressed, cooled and expanded to a lower pressure providing another cold stream. This cold stream is used to cool the remaining feed gas stream in a second indirect heat exchange process. The expanded stream exiting from the second heat exchange process is used for supplemental cooling in the first indirect heat exchange step. The remaining feed gas is subsequently expanded to ...

SYSTEM AND PROCESS FOR LIQUEFYING NATURAL GAS

A process of liquefying a natural gas stream in a liquefied natural gas facility is provided. The process includes cooling the natural gas stream in a first refrigeration cycle to produce a cooled natural gas stream. The process also includes cooling the cooled natural gas stream in a first chiller of a second refrigeration cycle, the cooled natural gas stream exiting the first chiller at a first pressure. The process further includes cooling the cooled natural gas stream in a first core of a second chiller of the second refrigeration cycle. The process yet further includes cooling a refrigerant of a refrigerant recycle stream separate from the cooled natural gas stream in a second core of the second chiller of the second refrigeration cycle, wherein the refrigerant recycle stream enters the second chiller at a second pressure that is lower than the first pressure of the cooled natural gas stream.

LNG FORMATION

Systems and a method for the formation of a liquefied natural gas (LNG) are disclosed herein. The system includes a refrigeration system configured to chill a natural gas using a refrigerant mixture including a noble gas. The system also includes an autorefrigeration system configured to use the natural g self-refrigerant to form the LNG from the natural gas.

СПОСОБ ОБРАБОТКИ ПОТОКА СПГ, ПОЛУЧЕННОГО ОХЛАЖДЕНИЕМ ПРИ ПОМОЩИ ПЕРВОГО ЦИКЛА ОХЛАЖДЕНИЯ, И УСТАНОВКА ДЛЯ ЕГО ОСУЩЕСТВЛЕНИЯ

Согласно способу поток (11) СПГ охлаждают охлаждающей текучей средой (83) в первом теплообменнике (19). Охлаждающая текучая среда (83) проходит через второй полуоткрытый цикл (21) охлаждения, независимый от первого цикла (15). Способ содержит стадию введения переохлажденного потока (59) СПГ в дистилляционную колонну (49) и стадию извлечения газового потока (69) в головной части колонны (49). Второй цикл (21) охлаждения содержит стадию получения потока (73) охлаждающей текучей среды из части головного газового потока (69), стадию сжатия потока (73) охлаждающей текучей среды до низкого давления, затем стадию расширения части (81) потока (75) сжатой охлаждающей текучей среды для получения в основном жидкого потока (83) переохлаждения. В основном жидкий поток (83) испаряется в первом теплобменнике (19).

Method for liquefy of natural gas

PROCEEDED OF LIQUEFACTION Of a GAS IN PARTICULAR a NATURAL GAS OR AIR COMPRISING a PURGING HAS AVERAGE PRESSURE AND ITS APPLICATION

Procédé de liquéfaction d'un composé A à partir d'un mélange comportant au moins ledit composé A et un ou plusieurs composés B, ledit mélange étant disponible à une pression P1, au cours duquel on effectue la séparation du ou desdits composés B et/ ou la séparation du composé A par distillation à une pression sensiblement voisine de la pression P2 pour produire au moins un flux F1 comportant en majorité ledit composé A et au moins un flux F4 comportant la quasi-totalité des composés B. Application pour extraire le méthane et/ ou l'hélium lors de la liquéfaction d'un gaz naturel.

향상된 천연 가스 제조를 위한 초전도 시스템

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

METHOD FOR PROCESSING A STREAM OF LNG OBTAINED BY MEANS OF COOLING USING A FIRST REFRIGERETION CYCLE AND ASSOCIATED INSTALLATION

method for liquefaction of natural gas

A PROCESS TO SEPARATE A CURRENT OF PRESSURIZED FEEDING OF MULTIPLE COMPONENTS BEING USED DISTILLATION

Se describe un proceso para eliminar un componente de alta volatilidad, tal como nitrogeno, de una corriente de alimentacion rica en metano, para producirun producto sustancialmente libre del componente de alta volatilidad. La corriente dealimentaci on es expandida y alimentada a un separador de fases queproduce una corriente de vapor y una corriente líquida. La corriente de vapor es enriquecida con el componente volátil. La corriente líquida, que es pobre enel componente volátil yrica en metan o, es bombeada a una presion superior y calentada para producir una corriente de producto licuada presurizada que tieneuna presion suficiente para que la corriente de producto esté a punto de ebullicion o por debajo del mismo, y quetiene una tempera tura superior aaproximadamente -112sC (-170sF).

PROCEDE AMELIORE POUR LA LIQUIQUEFACTION DU GAZ NATUREL

UN PROCESSUS EST RELEVE POUR LE TRANSPORT D'UN FLUX DE GAZ RICHE EN METHANE, TEL QUE LE GAZ NATUREL. DANS LA PREMIERE PHASE DU PROCEDE, LE GAZ EST FOURNI A UN GAZODUC A UNE PRESSION A L'ENTREE QUI EST SUBSTANTIELLEMENT PLUS IMPORTANTE QUE LA PRESSION A LA SORTIE DU GAZODUC. LA BAISSE DE PRESSION DANS LE GAZODUC CAUSE UNE BAISSE DE LA TEMPERATURE DU GAZ, PREFERABLEMENT UNE TEMPERATURE DE MOINS -29°C (-20°F). LA PRESSION A L'ENTREE DU GAZ DANS LE GAZODUC EST CONTROLEE POUR AVOIR UNE PRESSION DE SORTIE DU GAZ PREDETERMINEE DANS LE GAZODUC. LE GAZ SORTANT DU GAZODUC EST ALORS LIQUEFIE POUR PRODUIRE DU GAZ LIQUEFIE, AYANT UNE TEMPERATURE AU-DESSUS D'ENVIRON - 112°C (-170°F) ET UNE PRESSION SUFFISANTE POUR LE LIQUIDE SOIT A OU EN DESSOUS DE LA TEMPERATURE DU POINT DE BULLE. LE GAZ LIQUIFIE, COMPRIME EST ALORS TRANSPORTE PLUS LOIN DANS UN CONTAINER CONVENABLE ...

Process for liquefying a gas, notably a natural gas or air, comprising a medium pressure drain and application

The invention is a process for liquefying a compound A from a mixture comprising at least compound A and at least one compound B. The mixture is available at a pressure P1 with separation of the at least one compounds B and/or of compound A being performed by distillation at a pressure substantially close to pressure P2 in order to produce at least a stream mainly comprising the compound A and at least a stream F4 comprising most of the at least one compound B. The invention has an application of methane and/or helium extraction during liquefaction of a natural gas.

Method for liquifying natural gas

A method for liquefying natural gas comprises heat exchanging a pressurized natural gas with two independent coolant circuits. The first coolant circuit pre-cools the compressed natural gas. After the natural gas is pre-cooled in the first circuit, a major portion is liquefied in heat exchange with the coolant in the second circuit while the remaining minor portion is liquefied in heat exchange with the flash gas formed when the so liquefied natural gas is expanded. Subsequent to the flash gas being heat exchanged with the divided minor fraction of natural gas, it is compressed and then at least partly liquefied in heat exchange with the coolants in the first and second circuits and subsequently expanded in the separator containing said flash gas.

Hybrid cycle for production of liquefied natural gas

СПОСОБ СЖИЖЕНИЯ ПРИРОДНОГО ГАЗА

FIELD: gas industry. SUBSTANCE: gas plant for liquefying the flow of initial natural gas is proposed. Plant includes gas separation unit, having at least one fractioning reservoir. Adsorption layers for adsorption kinetic separation are used in the separation unit. Adsorption layers release methane-rich flow of initial gas. Plant also includes refrigeration system with expander cycle of high pressure. Refrigeration system compresses the methane-rich gas flow to absolute pressure making more than approximately 1,000 pounds per square inch (6895 kPa). Refrigerating system also cools down the flow of methane-rich initial gas in one or more refrigerators and then extends the flow of cooled natural gas, forming a flow of liquefied product. Methods of initial natural gas flow liquefaction using AKP and refrigerating system with expander cycle of high pressure are also proposed in this invention. EFFECT: these methods make it possible to produce LNG using plant with smaller weight than traditional ones. 26 cl, 9 dwg, 4 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 596 764 C2 (51) МПК B01D 53/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2014108880/05, 29.06.2012 (24) Дата начала отсчета срока действия патента: 29.06.2012 Приоритет(ы): (30) Конвенционный приоритет: (72) Автор(ы): КЕЛЛИ Брюс Т. (US), ДЕКМАН Гарри В. (US), МИНТА Моузес К. (US) 09.08.2011 US 61/521,657 (43) Дата публикации заявки: 20.09.2015 Бюл. № 26 R U (73) Патентообладатель(и): ЭКСОНМОБИЛ АПСТРИМ РИСЕРЧ КОМПАНИ (US) (45) Опубликовано: 10.09.2016 Бюл. № 25 2 5 9 6 7 6 4 (56) Список документов, цитированных в отчете о поиске: US 6631626 В1, 14.10.2003. US 20100186445 А1, 29.07.2010 . RU 2211877 C2, 10.09.2003. US 2011067440 A1, 24.03.2011. (85) Дата начала рассмотрения заявки PCT на национальной фазе: 11.03.2014 (86) Заявка PCT: 2 5 9 6 7 6 4 R U (87) Публикация заявки PCT: C 2 C 2 US 2012/045005 (29.06.2012) WO 2013/022529 (14.02.2013) ...

СПОСОБ СЖИЖЕНИЯ ОБОГАЩЕННОЙ УГЛЕВОДОРОДАМИ, СОДЕРЖАЩЕЙ АЗОТ СЫРЬЕВОЙ ФРАКЦИИ, ПРЕДПОЧТИТЕЛЬНО ПРИРОДНОГО ГАЗА

Изобретение относится к способу сжижения обогащенной углеводородами, содержащей азот исходной фракции, предпочтительно природного газа. Способ содержит стадии: a) сырьевую фракцию (1) сжижают (E1, E2), b) разделяют ректификацией (T1) на обогащенную азотом фракцию (9), содержание метана в которой составляет макс. 1 об.%, и на обогащенную углеводородами, обедненную азотом фракцию (4), c) указанную фракцию (4) переохлаждают (E3) и расширяют (b), d) расширенную обогащенную углеводородами, обедненную азотом фракцию (5) разделяют (D1) на жидкую обогащенную углеводородами фракцию (6), содержание азота в которой составляет макс. 1 об.%, и фракцию (7), обогащенную азотом, и e) обогащенную азотом фракцию (7) добавляют в сырьевую фракцию (1). Способ позволяет отвести весь содержащийся в сырьевой фракции азот, либо с потоком продуктового ЖПГ, либо с высококонцентрированной азотной фракцией. 6 з.п. ф-лы, 2 ил.

УСТАНОВКА И СПОСОБ ДЛЯ СЖИЖЕНИЯ ПРИРОДНОГО ГАЗА

FIELD: power industry. SUBSTANCE: plant includes row (1) of in-series installed heat exchangers of preliminary cooling with one cooling agent circulation circuit, which has inlet (13) for natural gas and outlet (14) for preliminary cooled natural gas, and distributor (4). Row of heat exchangers of preliminary cooling and distributor are arranged with possibility of obtaining at least the first and the second pre-cooled natural gas sub-flows. Besides the plant includes two units for removal of liquid fractions from natural gas, which have inlet, outlet for heavy fraction and outlet for light fraction removed from the top of the column, as well as two main heat exchangers (5, 5) intended for cooling with liquefaction of light fraction removed from the top of the column of the appropriate unit for removal of liquids from natural gas. EFFECT: providing liquefied gas meeting various process requirements. 10 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 395 765 (13) C2 (51) МПК F25J 1/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2007130261/06, 15.02.2006 (24) Дата начала отсчета срока действия патента: 15.02.2006 (72) Автор(ы): БЁЙС Корнелис (NL), КЛЕЙН НАГЕЛВОРТ Роберт (NL) (43) Дата публикации заявки: 20.02.2009 2 3 9 5 7 6 5 (45) Опубликовано: 27.07.2010 Бюл. № 21 2 3 9 5 7 6 5 (85) Дата перевода заявки PCT на национальную фазу: 07.08.2007 C 2 C 2 (56) Список документов, цитированных в отчете о поиске: US 2005005635 A1, 13.01.2005. VEGA DE LA F F et al, LNG plant reliability analysis, Meeting, Paper at cryogenic gas processing, no. 69B, 25.02.1996, c.1-20. EP 1092932 A1, 18.04.2001. US 2003154739 A1, 21.03.2003. US 6389844 B1, 21.05.2002. RU 2194930 C2, 20.12.2002. (86) Заявка PCT: EP 2006/050937 (15.02.2006) (87) Публикация PCT: WO 2006/087330 (24.08.2006) Адрес для переписки: 103735, Москва, ул. Ильинка, 5/2, ООО "Союзпатент", пат.пов. С.Б.Фелицыной, рег.№ 303 R U ...

СПОСОБ РАЗДЕЛЕНИЯ ПОТОКА МНОГОКОМПОНЕНТНОГО ИСХОДНОГО МАТЕРИАЛА ПОД ДАВЛЕНИЕМ ПУТЕМ ИСПОЛЬЗОВАНИЯ ДИСТИЛЛЯЦИИ

FIELD: processes or apparatus for separating of gaseous mixtures. SUBSTANCE: method for extracting of high-volatile component such as nitrogen from initial material rich in methane with the purpose of obtaining of product free from high-volatile component includes expansion of initial flow; introducing of expanded initial flow into phase-separation device in which liquid flow and vapor flow rich in volatile component are formed; pressurizing of liquid flow enriched in methane having low content of volatile component; heating of pressurized liquid flow for obtaining of pressurized liquefied product pressure of which provides product temperature less or equal to boiling temperature thereof, namely more than - 112 C (- 170 F). EFFECT: enhanced extraction of nitrogen from natural gas flow simultaneously with obtaining of pressurized liquefied natural gas. 12 cl, 2 dwg, 2 tbl сб сс ПЧ сэ (19) РОССИЙСКОЕ АГЕНТСТВО ПО ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ ВИ "” 2 215 952 ' (51) МПК? 13) С2 Е 25 4 3/02, В ОЛ 3/00 12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ РОССИЙСКОЙ ФЕДЕРАЦИИ (21), (22) Заявка: 2001113729/12, 22.10.1999 (24) Дата начала действия патента: 22.10.1999 (30) Приоритет: 22.10.1998 Ш$ 60/105,235 (43) Дата публикации заявки: 20.06.2003 (46) Дата публикации: 10.11.2003 (56) Ссылки: КУ 2085815 СЛ, 27.07.1997. 1$ 5114451 А, 19.05.1992. 4$ 44512715 А, 29.05.1984. Ц$ 5325613 А, 05.07.1994. КЧ 2045688 СЛ, 10.10.1995. (85) Дата перевода заявки РСТ на национальную фазу: 22.05.2001 (86) Заявка РСТ: 1$ 99/24804 (22.10.1999) (87) Публикация РСТ: М/О 00/23164 (27.04.2000) (98) Адрес для переписки: 129010, Москва, ул. Большая Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры", пат.пов. Е.В.Томской (71) Заявитель: ЭКСОНМОБИЛ АПСТРИМ РИСЕРЧ КОМПАНИ (95) (72) Изобретатель: КОУЛ Эрик Т. (ЦЗ), СТОУН Брэндон Т. (1$) (73) Патентообладатель: ЭКСОНМОБИЛ АПСТРИМ РИСЕРЧ КОМПАНИ (45) (74) Патентный поверенный: Томская Елена Владимировна (54) СПОСОБ РАЗДЕЛЕНИЯ ПОТОКА МНОГОКОМПОНЕНТНОГО ...

УСТАНОВКА И СПОСОБ ДЛЯ СЖИЖЕНИЯ ПРИРОДНОГО ГАЗА

FIELD: power industry. SUBSTANCE: plant (10) for liquefaction of natural gas includes at least row (1) of in-series installed heat exchangers of preliminary cooling, which includes end heat exchanger (2a) for cooling flow (90) of natural gas, distributor (4) arranged upstream end heat exchanger, which is intended for separation of flow (90) of natural gas into the first and the second sub-flows of natural gas, the first and the second cryogenic systems (200, 200'). Each of systems (200, 200') includes the main heat exchanger having the first hot side with one inlet made for receipt of the first and the second natural gas sub-flows respectively, and outlet for liquefied natural gas, and circulation circuit of the main cooling agent for heat removal from natural gas flowing through the first hot side of the appropriate main heat exchanger. Heat exchangers of the row of in-series connected heat exchangers for preliminary cooling are the part of one and the same cooling agent circulation circuit. EFFECT: simplifying the gas liquefaction plant and providing alternative plant allowing to meet various process requirements for liquefied natural gas. 12 cl, 6 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 395 764 (13) C2 (51) МПК F25J 1/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2007130260/06, 15.02.2006 (24) Дата начала отсчета срока действия патента: 15.02.2006 (73) Патентообладатель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) (43) Дата публикации заявки: 20.02.2009 2 3 9 5 7 6 4 (45) Опубликовано: 27.07.2010 Бюл. № 21 2 3 9 5 7 6 4 R U (85) Дата перевода заявки PCT на национальную фазу: 07.08.2007 C 2 C 2 (56) Список документов, цитированных в отчете о поиске: VEGA DE LA F F et al, LNG plant reliability analysis, Meeting, Paper at cryogenic gas processing, no. 69B, 25.02.1996, с.1-20. EP 1092932 A1, 18.04.2001. US 2003154739 A1, 21.03.2003. US 2005005635 A1, 13. ...

СПОСОБ И УСТАНОВКА ДЛЯ СЖИЖЕНИЯ ПОТОКА УГЛЕВОДОРОДОВ

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

КОМПЛЕКСНЫЙ СПОСОБ ИЗВЛЕЧЕНИЯ ГАЗОКОНДЕНСАТНЫХ ЖИДКОСТЕЙ И СЖИЖЕНИЯ ПРИРОДНОГО ГАЗА

Process for liquefying a gas

Method for refrigerating liquefied gas and installation therefor

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.

Process for liquefying natural gas by expansion cooling

Method for the liquefaction of a hydrocarbon-rich gas stream containing aromatic and heavy hydrocarbons

METHOD AND SYSTEM FOR COOLING A HYDROCARBON STREAM USING A GAS PHASE REFRIGERANT

Described herein are methods and systems for the liquefaction of a natural gas feed stream using a refrigerant comprising methane. The methods and systems use a refrigeration circuit and cycle that employs two or more turbo-expanders to expand two or more streams of gaseous refrigerant down to different pressures to provide cold streams of at least predominantly gaseous refrigerant at different pressures that are used to provide refrigeration for precooling and liquefying the natural gas. The resulting liquefied natural gas stream is then flashed to produce an LNG product and a flash gas, the flash gas being recycled to the natural gas feed stream.

MIXED REFRIGERANT LIQUEFACTION SYSTEM AND METHOD WITH PRE-COOLING

A system for cooling a gas includes a pre-cool heat exchanger and a liquefaction heat exchanger. The pre-cool heat exchanger uses a pre-cool refrigerant to pre-cool a feed gas stream prior to the stream being directed to a liquefaction heat exchanger. The liquefaction heat exchanger uses a mixed refrigerant to further cool the pre-cooled gas. The pre-cool heat exchanger also pre-cools the liquefaction mixed refrigerant used by the liquefaction heat exchanger.

MULTIPLE PRESSURE MIXED REFRIGERANT COOLING PROCESS

Systems and methods described for increasing capacity and efficiency of natural gas liquefaction processes having a mixed refrigerant precooling system with multiple pressure levels comprising cooling the compressed mixed refrigerant stream and separating the cooled compressed mixed refrigerant stream into a vapor and liquid portion. The liquid portion provides refrigeration duty to a first precooling heat exchanger. The vapor portion is further compressed, cooled, and condensed, and used to provide refrigeration duty to a second precooling heat exchanger. A flash gas separated from the liquefied natural gas is warmed and combined with the natural gas feed stream.

LIQUEFIED NATURAL GAS PRODUCTION

Hydrocarbon processing systems and a method for liquefied natural gas (LNG) production are described herein. The hydrocarbon processing system includes a fluorocarbon refrigeration system configured to cool a natural gas to produce LNG using a mixed fluorocarbon refrigerant and a nitrogen rejection unit (NRU) configured to remove nitrogen from the LNG.

NATURAL GAS LIQUEFACTION PROCESS

The described invention relates to processes and systems for treating a gas stream, particularly one rich in methane for forming liquefied natural gas (LNG), said process including: (a) providing a gas stream; (b) providing a refrigerant; (c) compressing said refrigerant to provide a compressed refrigerant; (d) cooling said compressed refrigerant by indirect heat exchange with a cooling fluid; (e) expanding the refrigerant of (d) to cool said refrigerant, thereby producing an expanded, cooled refrigerant; (f) passing said expanded, cooled refrigerant to a first heat exchange area; (g) compressing the gas stream of (a) to a pressure of from greater than or equal to 1,000 psia to less than or equal to 4,500 psia; (h) cooling said compressed gas stream by indirect heat exchange with an external cooling fluid; and heat exchanging the compressed gas stream with the expanded, cooled refrigerant stream.

GAS LIQUEFACTION PROCESS AND METHOD, ESPECIALLY FOR NATURAL GAS OR AIR, COMPRISING AVERAGE PRESSURE BLEED

... ~ Procédé de liquéfaction d'un composé A à partir d'un mélange comportant au moins ledit composé A et un ou plusieurs composés B, ledit mélange étant disponible à une pression P1, au cours duquel on effectue la séparation du ou desdits composés B et/ou la séparation du composé A par distillation à une pression sensiblement voisine de la pression P2 pour produire au moins un flux F 1 comportant en majorité ledit composé A et au moins un flux F4 comportant la quasi-totalité des composés B. ~ Application pour extraire le méthane et/ou l'hélium lors de la liquéfaction d' un gaz naturel ...

IMPROVED MULTI-COMPONENT REFRIGERATION PROCESS FOR LIQUEFACTION OF NATURAL GAS

This invention relates to a process for liquefying a pressurized gas stream (10) rich in methane in which the liquefication of the gas stream occurs in a heat exchanger (33) being cooled by a closed-loop multi- component refrigeration system (45) to produce a methane-rich liquid product having a temperature above about -112 .degree.C (-170 .degree.F) and a pressure sufficient for the liquid product to be at or belo w its bubble point. The liquefied gas product is then introduced to a storage mean s (50) at a temperature above about-112 .degree.C (-170 .degree.F).

PROCEEDED OF REFRIGERATION Of a GAS LIQUIFIES, GASES OBTAINED BY THIS PROCESS, ETINSTALLATION IMPLEMENTING THIS ONE

PROCEEDED OF PRODUCTION OF CURRENTS Of LIQUID AND GAS NITROGEN, a GAS CURRENT RICH IN HELIUM AND Of a CURRENT Of HYDROCARBONS DEAZOTE AND ASSOCIATED INSTALLATION.

Ce procédé comprend le refroidissement d'un courant d'introduction (72) au sein d'un échangeur thermique amont (28). Il comprend l'introduction du courant d'introduction refroidi (76) dans une colonne de fractionnement (50) et le prélèvement au fond de la colonne (50) du courant d'hydrocarbures déazoté. Il comprend l'introduction d'un courant riche en azote (106) provenant de la tête de la colonne (50) dans un ballon séparateur (60) et la récupération du courant de tête gazeux issu du ballon séparateur (60) pour former le courant riche en hélium (20). Le courant liquide (110) issu du pied du premier ballon séparateur (60) et est séparé en un courant d'azote liquide (18) et en un premier courant de reflux (114) introduit en reflux dans la tête de la colonne de fractionnement (50).

Natural gas liquefaction process

Le procédé de liquéfaction d'un gaz naturel selon l'invention consiste à liquéfier au moins en partie ce gaz en le détendant avec fourniture d'énergie mécanique, le gaz au cours de cette détente passant d'une phase dense à une phase liquide sans transition de phase. Le procédé comporte au moins les deux étapes suivantes: a) - on refroidit le gaz naturel constitué de plusieurs constituants à une pression au moins supérieure à la valeur de pression critique du méthane et à une température telle que ledit gaz se présente sous une forme de phase dense à la fin de ce refroidissement, b) - on détend et on liquéfie au moins en partie une fraction de ladite phase dense provenant de l'étape a) à travers un dispositif adapté à diminuer la pression du gaz selon une détente avec fourniture d'énergie mécanique, le passage de l'état de phase dense vers un état liquide se faisant sensiblement sans transition de phase.

Mixed Refrigerant Liquefaction System and Method

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

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 ...

MULTIPLE PRESSURE MIXED REFRIGERANT COOLING PROCESS

Systems and methods described for increasing capacity and efficiency of natural gas liquefaction processes having a mixed refrigerant precooling system with multiple pressure levels comprising cooling the compressed mixed refrigerant stream and separating the cooled compressed mixed refrigerant stream into a vapor and liquid portion. The liquid portion provides refrigeration duty to a first precooling heat exchanger. The vapor portion is further compressed, cooled, and condensed, and used to provide refrigeration duty to a second precooling heat exchanger. A flash gas separated from the liquefied natural gas is warmed and combined with the natural gas feed stream. 1. A method comprising:(a) cooling a hydrocarbon feed stream, comprising a hydrocarbon fluid, a second refrigerant feed stream, comprising a second mixed refrigerant, and at least one first refrigerant stream, comprising a first mixed refrigerant, by indirect heat exchange against the first mixed refrigerant in each of a plurality of heat exchange sections of a precooling subsystem to produce a precooled hydrocarbon stream, a precooled second refrigerant stream that is at least partially condensed, and a plurality of vaporized first refrigerant streams, the precooling subsystem comprising the plurality of heat exchange sections and a compression subsystem;{'b': '260', '(b) supplying a first inlet stream to a first precooling heat exchange section () at a first inlet pressure and a second inlet stream to the first precooling heat exchange section at a second inlet pressure that is higher than the first inlet pressure, each of the first and second inlet streams comprising the first mixed refrigerant, the first mixed refrigerant having a first inlet composition in the first inlet stream and a second inlet composition in the second inlet stream, the first inlet composition being different from the second inlet composition;'}(c) withdrawing a first vaporized first refrigerant stream from the first precooling ...

Liquefied Natural Gas Production

Hydrocarbon processing systems and a method for liquefied natural gas (LNG) production are described herein. The hydrocarbon processing system includes a fluorocarbon refrigeration system configured to cool a natural gas to produce LNG using a mixed fluorocarbon refrigerant and a nitrogen rejection unit (NRU) configured to remove nitrogen from the LNG. 1. A hydrocarbon processing system for liquefied natural gas (LNG) production , comprising:a fluorocarbon refrigeration system configured to cool a natural gas to produce LNG using a mixed fluorocarbon refrigerant;a nitrogen rejection unit (NRU) configured to remove nitrogen from the LNG; andan autorefrigeration system configured to further cool the natural gas to produce the LNG.2. The hydrocarbon processing system of claim 1 , comprising a nitrogen refrigeration system configured to further cool the natural gas to produce the LNG using a nitrogen refrigerant.3. (canceled)4. The hydrocarbon processing system of claim 1 , wherein the autorefrigeration system comprises a plurality of flash drums and a plurality of expansion devices.5. The hydrocarbon processing system of claim 1 , wherein at least a portion of the natural gas is cooled using a nitrogen stream separated from the natural gas via the NRU.6. The hydrocarbon processing system of claim 1 , wherein the fluorocarbon refrigeration system comprises a single mixed refrigerant cycle.7. The hydrocarbon processing system of claim 1 , wherein the fluorocarbon refrigeration system comprises a pre-cooled mixed refrigerant cycle.8. The hydrocarbon processing system of claim 1 , wherein the fluorocarbon refrigeration system comprises a dual mixed refrigerant cycle.9. The hydrocarbon processing system of claim 8 , wherein the dual mixed refrigerant cycle comprises:a first mixed refrigerant cycle that uses a warm mixed fluorocarbon refrigerant; anda second mixed refrigerant cycle that uses a cold mixed fluorocarbon refrigerant, wherein the first mixed refrigerant cycle and ...

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 ...

Reducing refrigeration duty on a refrigeration unit in a gas processing system

A liquefaction process configured to facilitate thermal transfer in a heat exchanger during liquefaction of a natural gas feedstock. The liquefaction process can include compressing a process stream to a first pressure, the process stream comprising predominantly methane, cooling the process stream to a first temperature, expanding the process stream from the first pressure to a second pressure that is less than the first pressure, bleeding-off a first product from the process stream at the second pressure, and conditioning the first product for storage as liquid natural gas (LNG).

PROCESS FOR EXPANSION AND STORAGE OF A FLOW OF LIQUEFIED NATURAL GAS FROM A NATURAL GAS LIQUEFACTION PLANT, AND ASSOCIATED PLANT

The process comprises the following steps: mixing a gaseous stream of flash gas and a gaseous stream of boil-off gas to form a mixed gaseous flow; compressing the mixed gaseous flow in at least one compression apparatus to form a flow of compressed combustible gas; withdrawing a bypass flow in the flow of compressed combustible gas; compressing the bypass flow in at least one downstream compressor; cooling and expanding the compressed bypass flow; reheating at least a first stream derived from the expanded bypass flow in at least one downstream heat exchanger, reintroducing the first reheated stream in the mixed gaseous flow upstream from the compression apparatus. 1. A process for expansion and storage of a flow of liquefied natural gas from a natural gas liquefaction plant , comprising:flash expanding the flow of liquefied natural gas in an expander to form a flow of expanded liquefied natural gas;bringing the flow of expanded liquefied natural gas into a flash end capacitor;recovering, at the bottom of the flash end capacitor, a liquid stream of liquefied natural gas;conveying the liquid stream of liquefied natural gas into at least one liquefied natural gas tank;withdrawing, at the head of the flash end capacitor, a gaseous stream of flash gas;recovering, at the head of the liquefied natural gas tank, a gaseous stream of boil-off gas;mixing the gaseous stream of flash gas and the gaseous stream of boil-off gas to form a mixed gaseous flow;compressing the mixed gaseous flow in at least one compressor to form a flow of compressed combustible gas;withdrawing a bypass flow in the flow of compressed combustible gas;compressing the bypass flow in at least one downstream compressor to form a compressed bypass flow;cooling the compressed bypass flow;expanding the compressed bypass flow to form an expanded bypass stream;reheating at least a first stream derived from the expanded bypass flow in at least one downstream heat exchanger,reintroducing the first reheated stream ...

MULTI-PRODUCT LIQUEFACTION METHOD AND SYSTEM

A liquefaction system is capable of sequentially or simultaneously liquefying multiple feed streams of hydrocarbons having different normal bubble points with minimal flash. The liquefying heat exchanger has separate circuits for handling multiple feed streams. The feed stream with the lowest normal boiling point is sub-cooled sufficiently to suppress most of the flash. Feed streams with relatively high normal boiling points are cooled to substantially the same temperature, then blended with bypass streams to maintain each product near its normal bubble point. The system can also liquefy one stream at a time by using a dedicated circuit or by allocating the same feed to multiple circuits. 115.-. (canceled)16. An apparatus comprising:a coil-wound heat exchanger having a warm end, a cold end, a tube side having a plurality of cooling conduits;a first feed stream conduit in upstream fluid flow communication with at least one of the plurality of cooling conduits and in downstream fluid flow communication with a supply of a first hydrocarbon fluid having a first normal bubble point;a second feed stream conduit n upstream fluid flow communication with at least one of the plurality of cooling conduits and in downstream fluid flow communication and a second hydrocarbon fluid having a second normal bubble point that is lower than the first normal bubble point;a first cooled feed stream conduit in downstream fluid flow communication with the first feed stream conduit and at least one of the plurality of cooling conduits;a second cooled feed stream conduit in downstream fluid flow communication with the second feed stream conduit and at least one of the plurality of cooling conduits;a first product stream conduit in downstream fluid flow communication with the first cooled feed stream;a second product stream conduit in downstream fluid flow communication with the second cooled feed stream;a first bypass conduit having at least one valve, an upstream end in fluid flow ...

System and Method for Removing Freezing Components from a Feed Gas

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

System and Method for Removing Freezing Components from a Feed Gas

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

LOW PRESSURE ETHANE LIQUEFACTION AND PURIFICATION FROM A HIGH PRESSURE LIQUID ETHANE SOURCE

A plant and process are used to liquefy and purify a high pressure ethane feed stream. The plant includes a cascaded refrigeration system that refrigerates the ethane feed stream. The refrigeration system includes a propylene circuit, an ethylene circuit and a mixed refrigerant circuit. The mixed refrigerant circuit includes a refrigerant that includes ethane and methane. The plant includes a demethanizer that is configured to remove methane and other natural gas liquids from the refrigerated ethane stream. 1. A method for liquefying and purifying a high pressure ethane feed stream , the method comprising the steps of:dehydrating the ethane feed stream; and passing the dehydrated ethane feed stream through a plurality of cascaded refrigeration circuits; and', 'demethanizing a portion of the refrigerated ethane feed stream., 'refrigerating the dehydrated ethane feed stream, wherein the step of refrigerating the dehydrated ethane feed stream further comprises2. The method of claim 1 , wherein the step of refrigerating the dehydrated ethane feed stream further comprises passing the dehydrated ethane feed stream through a plurality of cascaded refrigeration circuits that use a plurality of refrigerants.3. The method of claim 2 , wherein the step of refrigerating the dehydrated ethane feed stream further comprises:passing a propylene refrigerant through a first refrigeration circuit;passing the dehydrated ethane feed stream through the first refrigeration circuit;passing an ethylene refrigerant through a second refrigeration circuit;passing the dehydrated ethane feed stream through the second refrigeration circuit;passing a mixed refrigerant through a third refrigeration circuit; andpassing the dehydrated ethane feed stream through the third refrigeration circuit.4. The method of claim 3 , wherein the step of passing the mixed refrigerant further comprises passing a mixed refrigerant that includes methane and ethane through the third refrigeration circuit.5. The method ...

INTEGRATED PROCESS FOR NGL (NATURAL GAS LIQUIDS RECOVERY) AND LNG (LIQUEFACTION OF NATURAL GAS)

The invention relates to an integrated process and apparatus for liquefaction of natural gas and recovery of natural gas liquids. In particular, the improved process and apparatus reduces the energy consumption of a Liquefied Natural Gas (LNG) unit by using a portion of the already cooled overhead vapor from a fractionation column from an NGL (natural gas liquefaction) unit to, depending upon composition, provide, for example, reflux for fractionation in the NGL unit and/or a cold feed for the LNG unit, or by cooling, within the NGL unit, a residue gas originating from a fractionation column of the NGL unit and using the resultant cooled residue gas to, depending upon composition, provide, for example, reflux/feed for fractionation in the NGL and/or a cold feed for the LNG unit, thereby reducing the energy consumption of the LNG unit and rendering the process more energy-efficient. 2. (canceled)3. (canceled)4. (canceled)5. The process according to claim 1 , wherein:said feed stream containing light hydrocarbons is split into at least a first partial stream and a second partial stream;introducing said first partial stream of the feed stream into a main heat exchanger wherein said first partial stream of the feed stream is cooled and partially condensed by indirect heat exchange with process streams removed from said demethanizer column;introducing said second partial stream of the feed stream into another heat exchanger wherein said second partial stream of the feed stream is cooled and partially condensed by indirect heat exchange at least a portion of the overhead gaseous stream from said demethanizer column;recombining said first and second partial streams of the feed stream, and optionally subjecting the resultant recombined feed stream to heat exchange with a refrigerant; andintroducing the recombined feed stream into said gas/liquid cold separator to produce said overhead gaseous stream and said bottoms liquid stream.616-. (canceled)18. (canceled)19. The ...

Mixed Refrigerant Liquefaction System and Method with Pre-Cooling

A system for cooling a gas includes a pre-cool heat exchanger and a liquefaction heat exchanger. The pre-cool heat exchanger uses a pre-cool refrigerant to pre-cool a feed gas stream prior to the stream being directed to a liquefaction heat exchanger. The liquefaction heat exchanger uses a mixed refrigerant to further cool the pre-cooled gas. The pre-cool heat exchanger also pre-cools the liquefaction mixed refrigerant used by the liquefaction heat exchanger. 1. A system for cooling a gas with a pre-cool refrigerant and a mixed refrigerant comprising:a. a pre-cool heat exchanger having a feed gas inlet adapted to receive a feed gas stream and a feed gas outlet, a pre-cool refrigerant inlet and a pre-cool refrigerant outlet and a liquefaction mixed refrigerant inlet and a liquefaction mixed refrigerant outlet, said pre-cool heat exchanger configured to use the pre-cool refrigerant to cool feed gas passing through the pre-cool heat exchanger between the feed gas inlet and outlet and to cool liquefaction mixed refrigerant passing through the pre-cool heat exchanger between the liquefaction mixed refrigerant inlet and outlet; i) a pre-cool compressor having an inlet in fluid communication with the pre-cool refrigerant outlet of the pre-cool heat exchanger;', 'ii) a pre-cool condenser having an inlet in fluid communication with an outlet of the pre-cool compressor, said pre-cool condenser also having outlet in fluid communication with the pre-cool refrigerant inlet of the pre-cool heat exchanger:, 'b. a pre-cool compressor system includingc. a liquefaction heat exchanger including a liquefying passage in fluid communication with the feed gas outlet of the pre-cool heat exchanger, a primary refrigeration passage, a high pressure vapor cooling passage and a cold separator vapor cooling passage, where the cold separator vapor cooling passage has an outlet in fluid communication with the primary refrigeration passage; i) a mixed refrigerant compressor having an inlet in ...

Method and System for Cooling a Hydrocarbon Stream Using a Gas Phase Refrigerant

Described herein are methods and systems for the liquefaction of a natural gas feed stream using a refrigerant comprising methane. The methods and systems use a refrigeration circuit and cycle that employs two or more turbo-expanders to expand two or more streams of gaseous refrigerant down to different pressures to provide cold streams of at least predominantly gaseous refrigerant at different pressures that are used to provide refrigeration for precooling and liquefying the natural gas. The resulting liquefied natural gas stream is then flashed to produce an LNG product and a flash gas, the flash gas being recycled to the natural gas feed stream.

Method for sub-cooling a normally gaseous hydrocarbon mixture

A method for sub-cooling normally gaseous hydrocarbon mixtures produced in a cryogenic process unit wherein the mixture is introduced to a gas/liquid separator, which may be a storage vessel, and vapor containing at least two components of the mixture is recovered as refrigerant, employed in an open cycle refrigeration system to sub-cool the hydrocarbon mixture, and returned to the separator. The system is particularly useful for sub-cooling a hydrocarbon product stream while, at the same time, recovering boil-off vapor from a cryogenic storage vessel.

METHOD FOR UNDERCOOLING A NORMALLY GASEOUS HYDROCARBON MIXTURE.

Method for sub-cooling a normally gaseous hydrocarbon mixture

METHOD FOR SUB-COOLING NORMALLY GASEOUS HYDROCARBON MIXTURES.

Method for sub - cooling a normally gaseous hydrocarbon mixture

A METHOD FOR SUB-COOLING NORMALLY GASEOUS HYDROCARBON MIXTURES PRODUCED IN A CRYOGENIC PROCESS UNIT WHEREIN THE MIXTURE IS INTRODUCED TO A GAS/LIQUID SEPARATOR, WHICH MAY BE A STORAGE VESSEL, AND VAPOR CONTAINING AT LEAST TWO COMPONENTS OF THE MIXTURE IS RECOVERED AS REFRIGERANT, EMPLOYED IN AN OPEN CYCLE REFRIGERATION SYSTEM TO SUB-COOL THE HYDROCARBON MIXTURE, AND RETURNED TO THE SEPARATOR. THE SYSTEM IS PARTICULARLY USEFUL FOR SUB-COOLING A HYDROCARBON PRODUCT STREAM WHILE, AT THE SAME TIME, RECOVERING BOIL-OFF VAPOR FROM A CRYOGENIC STORAGE VESSEL. (FIG.1)

Method for sub-cooling a normally gaseous hydrocarbon mixture

Processo para sub-resfriar uma corrente de hidrocarboneto normalmente gasosa

A method that normally supercools a gaseous hydrocarbon mixture.

Method for sub-cooling a normally gaseous hydrocarbon mixture

ABSTRACT A method for sub-cooling normally gaseous hydrocarbon mix-tures produced in a cryogenic process unit wherein the mixture is introduced to a gas/liquid separator, which may be a storage vessel, and vapor containing at least two components of the mixture is recovered as refrigerant, employed in an open cycle refrigeration system to sub-cool the hydrocarbon mixture, and returned to the separator. The system is particularly useful for sub-cooling a hydrocarbon product stream while, at the same time, recovering boil-off vapor from a cryogenic storage vessel.

Procedimiento para subenfriar una corriente hidrocarbonada normalmente gaseosa

La presente invención se refiere a procedimiento para sub-enfriar una corriente hidrocarbonada normalmente gaseosa, caracterizada porque comprende las etapas de: a) expansionar una corriente hidrocarbonada, normalmente gaseosa, de múltiples componentes, sub-enfriada, en fase líquida dentro de una zona de separación adiabática gas/líquido a baja presión; b) recuperar una corriente del refrigerante gaseoso que contiene porciones de al menos dos de los componentes más ligeros de la corriente hidrocarbonada, normalmente gaseosa, de dicha zona de separación adiabática gas/líquido a baja presión; c) comprimir la corriente del refrigerante paseoso a una presión elevada y condensar entonces la corriente para formar un líquido refrigerante a elevada presión; d) sub-enfriar al menos una porción del líquido refrigerante a elevada presión, para formar un primer líquido refrigerante frío; e) expansionar al menos una porción del primer líquido refrigerante frío para formar un primer refrigerante a baja presión; f) vaporizar el primer refrigerante a baja presión para formar un primer refrigerante revaporizado a baja presión; g) introducir el primer refrigerante revaporizado a baja presión en la zona de separación adiabática gas/líquido a baja presión; h) sub-enfriar una corriente hidrocarbonada, normalmente gaseosa, de múltiples componentes por intercambio térmico indirecto con el primer refrigerante a baja presión para formar la corriente hidrocarbonada, normalmente gaseosa, de múltiples componentes, sub-enfriada, en fase líquida que se expansiona en la zona de separación adiabática gas/líquido a baja presión; e i) recuperar una corriente hidrocarbonada, en fase líquida, normalmente gaseosa de la zona de separación adiabática gas/líquido a baja presión.

Method for the sub-cooling of a mixture of normally gaseous hydrocarbons.

Fremgangsmaate for underkjoeling av en normalt gassformig hydrokarbonstroem.

통상 가스체인 탄화수소 혼합물의 차냉각방법

내용 없음

在通常条件下为气态的烃类混合物的深度冷却方法

一项用于深度冷却在制冷工艺装置中产生的、在 通常条件下为气态的烃类混合物的方法。其中，烃类 混合物被引至气—液分离器，分离器可以是一个储 槽。含有烃类混合物组分中两种组分以上的蒸汽被 回收作为致冷剂，并在一开路循环的制冷系统中用来 深度冷却烃类混合物，其后，致冷剂返回分离器。本 系统特别适合于在深度冷却烃类产品物料流的同时， 回收从冷冻储槽中汽化出的蒸汽。

Process for making pressurized liquefied natural gas from pressured natural gas using expansion cooling

This invention relates to process for liquefying a pressurized gas stream rich in methane. In a first step of the process, a first fraction of a pressurized feed stream, preferably at a pressure above 11,000 kPa, is withdrawn and entropically expanded to a lower pressure to cool and at least partially liquefy the withdrawn first fraction. A second fraction of the feed stream is cooled by indirect heat exchange with the expanded first fraction. The second fraction is subsequently expanded to a lower pressure, thereby at least partially liquefying the second fraction of the pressurized gas stream. The liquefied second fraction is withdrawn from the process as a pressurized product stream having a temperature above −112° C. and a pressure at or above its bubble point pressure.

用于冷却单组分或多组分的流的方法

本发明涉及通过与制冷剂混合物回路的制冷剂混合物的间接热交换而冷却单组分或多组分的流尤其是富含烃的馏分的方法，其中所述制冷剂混合物以至少二级进行压缩，并分离成被压缩至制冷剂混合物回路的最终压力的较低沸点的制冷剂混合物馏分和至少一种被压缩至中间压力的较高沸点的制冷剂混合物馏分。根据本发明，将所述较高沸点的制冷剂混合物馏分(5)泵送(P11)至所述较低沸点的制冷剂混合物馏分(8)的压力，并且在间接热交换(E1)之前或开始时立即与所述较低沸点的制冷剂混合物馏分(8)汇合。

Method of cooling boil off gas and an apparatus therefor

A method of cooling a boil off gas stream (01) from a liquefied cargo having a boiling point of greater than -110 °C when measured at 1 atmosphere in a liquefied cargo tank (50) in a floating transportation vessel, said method comprising at least the steps of: compressing a boil off gas stream (01) from said liquefied cargo in two or more stages of compression comprising at least a first compression stage (65) and a final compression stage (75) to provide a compressed BOG discharge stream (06), wherein said first compression stage (65) has a first stage suction pressure and said final compression stage (75) has a final stage suction pressure; cooling the compressed BOG discharge stream (06) against one or more first coolant streams (202, 302) to provide a first cooled compressed BOG stream (08); providing a gaseous vent stream (51) from the first cooled compressed BOG stream (08); cooling the first cooled compressed BOG stream (08) against a second coolant stream (33) to provide a second cooled compressed BOG stream (35); expanding a portion of the second cooled compressed BOG stream (35) to the first stage suction pressure or below to provide a first expanded cooled BOG stream (33); using the first expanded cooled BOG stream (33) as the second coolant stream to provide a first expanded heated BOG stream (38); and cooling the gaseous vent stream (51) against the second coolant stream (33) to provide a cooled vent stream (53), wherein cooling of the first cooled compressed BOG stream (08) and cooling of the gaseous vent stream (51) occurs in a heat exchanger located adjacent to the liquefied cargo tank (50).

Method and device for liquefaction of methane

Method of liquefaction of methane and filling a tank (2) with liquefied methane,said method comprising:a step of liquefaction of the methane comprising an operation of cooling the methane to its saturation temperature,a step of filling the tank with the liquefied methane,a step of reinjection of the vaporized methane into the liquefaction system.

Procede de traitement d'un courant de gnl obtenu par refroidissement au moyen d'un premier cycle de refrigeration et installation associee.

METHOD FOR LIQUIDATING NATURAL GAS

Deep flash LNG cycle

A system for liquefying and subcooling natural gas wherein compression power is shifted off the closed cycle refrigerant by subcooling the liquid natural gas to a relatively warm exit temperature and subsequently reducing the pressure and flashing the liquefied natural gas to recover a gaseous phase natural gas in excess of plant fuel requirements, the excess being recompressed and recycled to the feed to the process.

用于冷却单组分或多组分的流的方法

本发明涉及通过与制冷剂混合物回路的制冷剂混合物的间接热交换而冷却单组分或多组分的流尤其是富含烃的馏分的方法，其中所述制冷剂混合物以至少二级进行压缩，并分离成被压缩至制冷剂混合物回路的最终压力的较低沸点的制冷剂混合物馏分和至少一种被压缩至中间压力的较高沸点的制冷剂混合物馏分。根据本发明，将所述较高沸点的制冷剂混合物馏分(5)泵送(P11)至所述较低沸点的制冷剂混合物馏分(8)的压力，并且在间接热交换(E1)之前或开始时立即与所述较低沸点的制冷剂混合物馏分(8)汇合。

PROCEDURE FOR SUPPLYING A NORMALLY GAS-HYDROCARBON FLOW.

Method of supercooling gaseous hydrocarbon mixture under normal condition

Method for sub-cooling a normally gaseous hydrocarbon mixture

Method for sub-cooling a normally gaseous hydrocarbon mixture

A method for sub-cooling normally gaseous hydrocarbon mix­tures produced in a cryogenic process unit wherein the mixture (1) is introduced to a gas/liquid separator (4), which may be a storage vessel, and vapor (8) containing at least two components of the mixture is recovered as refrigerant, employed in an open cycle refrigeration system to sub-cool the hydrocarbon mixture, and returned to the separator. The system is particularly useful for sub-cooling a hydrocarbon product stream while, at the same time, recovering boil-off vapor from a cryogenic storage vessel.

Patent JPH0150830B2

Method Of Cooling Boil Off Gas And An Apparatus Therefor

A method of cooling a boil off gas stream ( 01 ) from a liquefied cargo having a boiling point of greater than −110° C. when measured at 1 atmosphere in a liquefied cargo tank ( 50 ) in a floating transportation vessel, said method comprising at least the steps of: compressing a boil off gas stream ( 01 ) from said liquefied cargo in two or more stages of compression comprising at least a first compression stage ( 65 ) and a final compression stage ( 75 ) to provide a compressed BOG discharge stream ( 06 ), wherein said first compression stage ( 65 ) has a first stage suction pressure and said final compression stage ( 75 ) has a final stage suction pressure; cooling the compressed BOG discharge stream ( 06 ) against one or more first coolant streams ( 202, 302 ) to provide a first cooled compressed BOG stream ( 08 ); providing a gaseous vent stream ( 51 ) from the first cooled compressed BOG stream ( 08 ); cooling the first cooled compressed BOG stream ( 08 ) against a second coolant stream ( 33 ) to provide a second cooled compressed BOG stream ( 35 ); expanding a portion of the second cooled compressed BOG stream ( 35 ) to the first stage suction pressure or below to provide a first expanded cooled BOG stream ( 33 ); using the first expanded cooled BOG stream ( 33 ) as the second coolant stream to provide a first expanded heated BOG stream ( 38 ); and cooling the gaseous vent stream ( 51 ) against the second coolant stream ( 33 ) to provide a cooled vent stream ( 53 ), wherein cooling of the first cooled compressed BOG stream ( 08 ) and cooling of the gaseous vent stream ( 51 ) occurs in a heat exchanger located adjacent to the liquefied cargo tank ( 50 ).

Process for liquefying a gas, notably a natural gas or air, comprising a medium pressure drain and application

Low pressure ethane liquefaction and purification from a high pressure liquid ethane source

A plant and process are used to liquefy and purify a high pressure ethane feed stream. The plant includes a cascaded refrigeration system that refrigerates the ethane feed stream. The refrigeration system includes a propylene circuit, an ethylene circuit and a mixed refrigerant circuit. The mixed refrigerant circuit includes a refrigerant that includes ethane and methane. The plant includes a demethanizer that is configured to remove methane and other natural gas liquids from the refrigerated ethane stream.

Method and apparatus for liquefying a hydrocarbon stream

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

Method and apparatus for liquefying a hydrocarbon stream

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

Method and apparatus for liquefying a hydrocarbon stream

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

Single circuit cryogenic liquefaction of industrial gas

A method for more efficiently liquefying industrial gas wherein refrigeration for the liquefaction is generated using a defined multicomponent refrigerant fluid and provided by a single flow circuit over a wide temperature range from ambient to cryogenic temperature.

Cryogenic industrial gas liquefaction with hybrid refrigeration generation

A method for liquefying an industrial gas wherein a portion of the requisite refrigeration is generated by a multicomponent refrigerant circuit and a portion is generated by turboexpansion of either a portion of the industrial gas or a portion of the multicomponent refrigerant.

Enhanced NGL recovery utilizing refrigeration and reflux from LNG plants

The present invention is directed to methods and apparatus for improving the recovery of the relatively less volatile components from a methane-rich gas feed under pressure to produce an NGL product while, at the same time, separately recovering the relatively more volatile components which are liquified to produce an LNG product. The methods of the present invention improve separation and efficiency within the NGL recovery column while maintaining column pressure to achieve efficient and economical utilization of the available mechanical refrigeration. The methods of the present invention are particularly useful for removing cyclohexane, benzene and other hazardous, heavy hydrocarbons from a gas feed. The benefits of the present invention are achieved by the introduction to the NGL recovery column of an enhanced liquid reflux lean on the NGL components. Further advantages can be achieved by thermally linking a side reboiler for the NGL recovery column with the overhead condenser for the NGL purifying column. Using the methods of the present invention, recoveries of propane and heavier components in excess of 95% are readily achievable.

ガス液化方法

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

Method of enhancing efficiency and controllability of process at closed loop and blended refrigerant for cooling gaseous material and system for realization of this method

FIELD: refrigerating engineering. SUBSTANCE: proposed method is used for cooling the gaseous materials at temperature range from 94°C to -129°C; proposed method includes raising temperature of liquefied gaseous material obtained in cooling zone to temperature of from -129°C to -154°C, reduction of pressure of liquefied gaseous material obtained in cooling zone for lowering the temperature of this material below -154°C and obtaining evaporated gas, separation of evaporated gas from liquefied gaseous material in separator reservoir, heating a part of evaporated gas to 4°C to 54°C, compression of part of evaporated gas to pressure exceeding the pressure of gaseous material delivered to cooling zone and mixing the part of compressed heated evaporated gas with gaseous material delivered to cooling zone. EFFECT: enhanced efficiency and controllability of process. 9 cl, 4 dwg ÐÎÑÑÈÉÑÊÀß ÔÅÄÅÐÀÖÈß (19) RU (11) 2 296 280 (13) C2 (51) ÌÏÊ F25J 1/02 (2006.01) ÔÅÄÅÐÀËÜÍÀß ÑËÓÆÁÀ ÏÎ ÈÍÒÅËËÅÊÒÓÀËÜÍÎÉ ÑÎÁÑÒÂÅÍÍÎÑÒÈ, ÏÀÒÅÍÒÀÌ È ÒÎÂÀÐÍÛÌ ÇÍÀÊÀÌ (12) ÎÏÈÑÀÍÈÅ ÈÇÎÁÐÅÒÅÍÈß Ê ÏÀÒÅÍÒÓ (21), (22) Çà âêà: 2003101322/06, 08.06.2001 (72) Àâòîð(û): ÕÎÔÔÀÐÒ Øîí Ä. (US), ÏÐÀÉÑ Áðàéàí Ê. (US) (24) Äàòà íà÷àëà îòñ÷åòà ñðîêà äåéñòâè ïàòåíòà: 08.06.2001 (73) Ïàòåíòîîáëàäàòåëü(è): Áëýê ýíä Âèò÷ Ïðèò÷àðä, Èíê. (US) R U (30) Êîíâåíöèîííûé ïðèîðèòåò: 09.06.2000 US 09/591,654 (43) Äàòà ïóáëèêàöèè çà âêè: 10.08.2004 (45) Îïóáëèêîâàíî: 27.03.2007 Áþë. ¹ 9 2 2 9 6 2 8 0 (56) Ñïèñîê äîêóìåíòîâ, öèòèðîâàííûõ â îò÷åòå î ïîèñêå: US 5657643 À, 19.08.1997. US 4541852 À, 17.09.1985. RU 2137066 C1, 10.09.1999. GB 1323831 A, 18.07.1973. US 5036671 A, 06.08.1991. (85) Äàòà ïåðåâîäà çà âêè PCT íà íàöèîíàëüíóþ ôàçó: 09.01.2003 2 2 9 6 2 8 0 R U (87) Ïóáëèêàöè PCT: WO 01/94865 (13.12.2001) C 2 C 2 (86) Çà âêà PCT: GB 01/02520 (08.06.2001) Àäðåñ äë ïåðåïèñêè: 191036, Ñàíêò-Ïåòåðáóðã, à/ 24, "ÍÅÂÈÍÏÀÒ", ïàò.ïîâ. À.Â.Ïîëèêàðïîâó (54) ÑÏÎÑÎÁ ÏÎÂÛØÅÍÈß ÝÔÔÅÊÒÈÂÍÎÑÒÈ È ÐÅÃÓËÈÐÓÅÌÎÑÒÈ ÏÐÎÖÅÑÑÀ Ñ ÇÀÌÊÍÓÒÛÌ ÊÎÍÒÓÐÎÌ È ÑÌÅØÀÍÍÛÌ ...

Improved method for cooling with mixed refrigerant at variable pressure

FIELD: gas industry.SUBSTANCE: invention relates to the processing of hydrocarbon gases. The method for cooling the flow of hydrocarbon raw materials includes cooling the flow of compressed mixed refrigerant and separating the flow of cooled compressed mixed refrigerant into vapor and liquid parts. The liquid part provides the cooling capacity of the first pre-cooling heat exchanger. The vapor part is further compressed, cooled and condensed and used to provide the cooling capacity of the second pre-cooling heat exchanger. The instantaneous vaporization gas separated from the liquefied natural gas is heated and combined with the raw natural gas flow.EFFECT: reduced raw gas losses.20 cl, 1 tbl, 6 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 749 405 C2 (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F25J 1/0022 (2020.08); F25J 1/0052 (2020.08); F25J 1/0055 (2020.08); F25J 1/006 (2020.08); F25J 1/0211 (2020.08); F25J 1/0212 (2020.08); F25J 1/0219 (2020.08); F25J 1/0257 (2020.08); F25J 1/0267 (2020.08); F25J 1/0291 (2020.08); F25J 1/0292 (2020.08); F25J 1/0294 (2020.08) (21)(22) Заявка: 2018133711, 25.09.2018 25.09.2018 Дата регистрации: Приоритет(ы): (30) Конвенционный приоритет: 28.09.2017 US 15/718,068 (43) Дата публикации заявки: 25.03.2020 Бюл. № 9 (54) УЛУЧШЕННЫЙ СПОСОБ ОХЛАЖДЕНИЯ СМЕШАННЫМ ХЛАДАГЕНТОМ ПРИ ПЕРЕМЕННОМ ДАВЛЕНИИ (57) Реферат: Изобретение относится к переработке Парообразную часть дополнительно сжимают, углеводородных газов. Способ охлаждения охлаждают и конденсируют и используют для потока углеводородного сырья включает обеспечения холодопроизводительности второго охлаждение потока сжатого смешанного теплообменника предварительного охлаждения. хладагента и разделение потока охлажденного Газ мгновенного испарения, отделенный от сжатого смешанного хладагента на сжиженного природного газа, нагревают и парообразную и жидкую части. Жидкая часть объединяют с сырьевым потоком ...

Method of transportation of liquefied natural gas

FIELD: pipe line transport. SUBSTANCE: proposed method includes delivery of gas to pipe line at inlet pressure exceeding outlet pressure and reduction of gas temperature due to Joule-Thomson effect caused by drop of pressure in pipe line; inlet pressure is controlled for obtaining required outlet pressure; gas escaping from pipe line is liquefied for obtaining temperature of about minus 112 C and pressure sufficient for keeping the liquid at temperature below point of beginning of its boiling; liquefied natural gas is additionally transported in suitable container. Proposed method of transportation of liquefied natural gas includes the following stages: (a) at least part of flow of methanol-rich gas is cooled by passing this part through at least one heat exchanger cooled by means of closed-cycle refrigerating plant; (b) flow is additionally cooled due to its expansion in pipe line at reduction of pressure; (c) gas cooled during stage (b) is liquefied in liquefying unit for obtaining liquefied gas at temperature about minus 112 C and pressure sufficient for keeping the liquid at temperature at point below beginning of its boiling. According to second version, flow of gas at temperature of about minus 29 C to minus 73 C and pressure approximately of 1380 kPa to 6895 kPa is subjected to the following procedures: (a) flow of natural gas under pressure is introduced into first phase separation plant for forming first flow of liquid and first flow of vapor; 9b) pressure of liquid flow is controlled for obtaining pressure which is approximately equal to working pressure of third phase separation plant for separation phases in operation 91); (c) flow of liquid at regulated pressure is fed to third phase separation unit; (d) first flow of vapor is passed through first heat exchanger for heating first flow of vapor; (e) first flow of gas is compressed and cooled; (f) compressed first flow of vapor is passed through first heat exchanger for additional cooling of first flow of ...

기상 냉매를 사용하여 탄화수소 스트림을 냉각하기 위한 개선된 방법 및 시스템

메탄을 포함하는 냉매를 사용하여 천연 가스 스트림을 액화하기 위한 방법 및 시스템이 본원에 기재되어 있다. 이 방법 및 시스템은 천연 가스를 예냉 및 액화하기 위한 냉동을 제공하는데 사용되는 적어도 주로 가스인 냉매의 하나 이상의 스트림들을 상이한 압력에서 제공하기 위해 상이한 압력으로 가스 냉매의 2 이상의 스트림을 팽창시키기 위해 2 이상의 터보-익스팬더를 채택하는 냉동 회로 및 사이클을 이용한다. 결과적으로 액화된 천연 가스 스트림은 그후 플래시되어 LNG 생성물 및 플래시 가스를 생산하고, 플래시 가스는 천연 가스 공급물 스트림으로 리사이클된다.

Lng-bog再液化系统及其适用的混合冷剂

本发明涉及LNG存储及运输技术领域，具体涉及LNG‑BOG再液化系统及其适用的混合冷剂，该混合冷剂包括物理混合而成的氮气(N 2 ，R728)、甲烷(CH 4 ，R50)、乙烯(C 2 H 4 ，R1150)、乙烷(C 2 H 6 ，R170)、丙烷(C 3 H 8 ，R50)、异丁烷(iC 4 H 10 ，R600a)，所述混合冷剂中各摩尔组分浓度之和为100％，其中，N 2 摩尔浓度为10％‑13％，CH 4 摩尔浓度为18％‑35％，C 2 H 4 摩尔浓度为24％‑40％，C 2 H 6 摩尔浓度为4％‑30％，C 3 H 8 摩尔浓度为3％‑12％及iC 4 H 10 摩尔浓度为3％‑12％。本发明提出的混合冷剂无臭氧破坏、低温室效应，并且在低温下与润滑油具有良好互溶性的适于LNG‑BOG再液化系统。

IMPROVED COOLING PROCESS FOR NATURAL GAS LICUEFACTION

Un proceso para conducir un gas rico en metano que comprende los siguientes pasos:(a) Suministrar el gas a un gasoducto a una presión de entrada que es substancialmente más alta que la presión de salida del gasoducto, en donde la baja de la temperatura del gas resulta por el efecto Joule - Thomson creado por la caída en la presión del gasoducto. (b) Controlar la presión de entrada para obtener una determinada presión de salida del gasoducto.(c) Licuar el gas de salida del gasoducto para producir gas licuado que tenga una temperatura por encima de aproximadamente -112°C (-170°F) y una presión suficiente para que el líquido esté en o por debajo de su punto de burbuja; y(d) Transportar posteriormente el gas licuado presurizado en un contenedor adecuado.<EMI FILE="99065981_1" ID="1" IMF=JPEG > A process for conducting a methane-rich gas comprising the following steps: (a) Supply the gas to a gas pipeline at an inlet pressure that is substantially higher than the outlet pressure of the gas pipeline, where the temperature of the gas temperature drops gas results from the Joule - Thomson effect created by the drop in gas pipeline pressure. (b) Check the inlet pressure to obtain a certain outlet pressure of the pipeline. (c) Blend the outlet gas from the pipeline to produce liquefied gas having a temperature above approximately -112 ° C (-170 ° F) and sufficient pressure for the liquid to be at or below its bubble point; and (d) Subsequently transport the pressurized liquefied gas into a suitable container. <EMI FILE = "99065981_1" ID = "1" MFI = JPEG>

Улучшенная система охлаждения смешанным хладагентом при переменном давлении

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2018 133 713 A (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2018133713, 25.09.2018 (71) Заявитель(и): ЭР ПРОДАКТС ЭНД КЕМИКАЛЗ, ИНК. (US) Приоритет(ы): (30) Конвенционный приоритет: 28.09.2017 US 15/718,132 Адрес для переписки: 129090, Москва, ул. Большая Спасская, д. 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" Стр.: 1 A 2 0 1 8 1 3 3 7 1 3 R U A (57) Формула изобретения 1. Устройство для сжижения потока углеводородного сырья, содержащее подсистему сжатия, включающую в себя по меньшей мере одну ступень сжатия; подсистему предварительного охлаждения, включающую в себя: множество участков теплообмена, причем множество участков теплообмена включает в себя самый теплый участок теплообмена и самый холодный участок теплообмена; первый контур для углеводородов, который проходит через каждый из множества участков теплообмена, причем первый контур для углеводородов расположен ниже по потоку от подачи углеводородной жидкости и сообщается по потоку текучей среды с ней; основной теплообменник, содержащий второй контур для углеводородов, который расположен ниже по потоку от первого контура для углеводородов и сообщается по потоку текучей среды с ним для приема потока предварительно охлажденных углеводородов из первого контура для углеводородов, причем основной теплообменник имеет рабочую конфигурацию для по меньшей мере частичного сжижения потока предварительно охлажденных углеводородов путем непрямого теплообмена со вторым хладагентом с получением первого потока сжиженных углеводородов; второй контур хладагента, который проходит через каждый из множества участков теплообмена и основной теплообменник, причем второй контур хладагента содержит второй хладагент, и, при этом, второй контур хладагента имеет такую рабочую конфигурацию, чтобы обеспечивать охлаждение основного теплообменника; первый контур хладагента для предварительного охлаждения, ...

Улучшенный способ охлаждения смешанным хладагентом при переменном давлении

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2018 133 711 A (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2018133711, 25.09.2018 (71) Заявитель(и): ЭР ПРОДАКТС ЭНД КЕМИКАЛЗ, ИНК. (US) Приоритет(ы): (30) Конвенционный приоритет: 28.09.2017 US 15/718,068 Адрес для переписки: 129090, Москва, ул. Большая Спасская, д. 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" Стр.: 1 A 2 0 1 8 1 3 3 7 1 1 R U A (57) Формула изобретения 1. Способ, включающий в себя: (a) охлаждение потока углеводородного сырья, содержащего углеводородную текучую среду, сырьевого потока второго хладагента, содержащего второй смешанный хладагент, и по меньшей мере одного потока первого хладагента, содержащего первый смешанный хладагент, путем непрямого теплообмена с первым смешанным хладагентом на каждом из множества участков теплообмена подсистемы предварительного охлаждения с получением потока предварительно охлажденных углеводородов, потока предварительно охлажденного второго хладагента, который является по меньшей мере частично конденсированным, и множества потоков парообразного первого хладагента, причем подсистема предварительного охлаждения включает в себя множество участков теплообмена и подсистему сжатия, (b) подачу первого входящего потока на первый участок (260) теплообмена предварительного охлаждения при первом давлении на входе и второго входящего потока на первый участок теплообмена предварительного охлаждения при втором давлении на входе, которое выше первого давления на входе, причем каждый из первого и второго входящих потоков содержит первый смешанный хладагент, и, при этом, первый смешанный хладагент имеет первую композицию на входе в первом входящем потоке и вторую композицию на входе во втором входящем потоке, причем первая композиция на входе отличается от второй композиции на входе; (c) отведение первого потока парообразного первого хладагента с первого участка теплообмена предварительного ...

通过第一制冷循环冷却得到的液化天然气流的处理方法和相关装置

本方法中，在所述第一热交换器(19)内，通过与制冷流体(83)热交换来冷却液化天然气流(11)。使制冷流体(83)经受半开式的第二制冷循环(21)，该第二制冷循环独立于所述第一制冷循环(17)。所述方法包括将过冷液化天然气流(59)引入蒸馏塔(49)内的步骤，以及回收所述蒸馏塔(49)顶部的气体流(69)的步骤。所述第二制冷循环(21)包括：由顶部的气体流(69)的一部分形成制冷流体流(73)的步骤；压缩所述制冷流体流(73)到一高压的步骤；然后将被压缩的制冷流体流(75)的一部分(81)膨胀以形成基本液态的过冷流(83)的步骤。所述基本液态的过冷流(83)在所述第一热交换器(19)内被汽化。

Liquefied natural gas production plant

FIELD: generation of gases. SUBSTANCE: invention relates to cryogenic equipment and can be used in the gas industry for liquefying natural gas. Proposed is a plant including a booster compressor 2, a purification and drying unit 3, a multi-flow heat exchanger 4, an integrated refrigerating machine with a multicomponent cooling agent, including a compressor 5, a refrigerator 1, and a reducing apparatus 6, also reducing apparatus 7, a separator 8, a compressor 9. The separator 8 is connected with the natural gas line after the purification and drying unit 3 by a separation gas removal line with the reverse stroke of the heat exchanger 4, the junction of the fuel gas removal line 16 connected with the compressor drive, and the compressor 9, located thereon consecutively. The booster compressor 2, compressor 5 of the integrated refrigerating machine, and separation gas compressor 9 are connected with the drive 10, also connected with an additional refrigerating machine 11, connected in turn by the cooling agent input/removal lines with the refrigerator 1. EFFECT: reduction in the specific power consumption. 1 cl, 2 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 767 848 C1 (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ На основании пункта 1 статьи 1366 части четвертой Гражданского кодекса Российской Федерации патентообладатель обязуется заключить договор об отчуждении патента на условиях, соответствующих установившейся практике, с любым гражданином Российской Федерации или российским юридическим лицом, кто первым изъявил такое желание и уведомил об этом патентообладателя и федеральный орган исполнительной власти по интеллектуальной собственности. (52) СПК (21)(22) Заявка: 2021102646, 04.02.2021 (24) Дата начала отсчета срока действия патента: (73) Патентообладатель(и): Курочкин Андрей Владиславович (RU) Дата регистрации: 22.03.2022 (56) Список документов, цитированных в отчете о поиске: US 2010313597 A1 ...

Patent RU2018133713A3

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2018 133 713 A (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2018133713, 25.09.2018 (71) Заявитель(и): ЭР ПРОДАКТС ЭНД КЕМИКАЛЗ, ИНК. (US) Приоритет(ы): (30) Конвенционный приоритет: 28.09.2017 US 15/718,132 Адрес для переписки: 129090, Москва, ул. Большая Спасская, д. 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" Стр.: 1 A 2 0 1 8 1 3 3 7 1 3 R U A (57) Формула изобретения 1. Устройство для сжижения потока углеводородного сырья, содержащее подсистему сжатия, включающую в себя по меньшей мере одну ступень сжатия; подсистему предварительного охлаждения, включающую в себя: множество участков теплообмена, причем множество участков теплообмена включает в себя самый теплый участок теплообмена и самый холодный участок теплообмена; первый контур для углеводородов, который проходит через каждый из множества участков теплообмена, причем первый контур для углеводородов расположен ниже по потоку от подачи углеводородной жидкости и сообщается по потоку текучей среды с ней; основной теплообменник, содержащий второй контур для углеводородов, который расположен ниже по потоку от первого контура для углеводородов и сообщается по потоку текучей среды с ним для приема потока предварительно охлажденных углеводородов из первого контура для углеводородов, причем основной теплообменник имеет рабочую конфигурацию для по меньшей мере частичного сжижения потока предварительно охлажденных углеводородов путем непрямого теплообмена со вторым хладагентом с получением первого потока сжиженных углеводородов; второй контур хладагента, который проходит через каждый из множества участков теплообмена и основной теплообменник, причем второй контур хладагента содержит второй хладагент, и, при этом, второй контур хладагента имеет такую рабочую конфигурацию, чтобы обеспечивать охлаждение основного теплообменника; первый контур хладагента для предварительного охлаждения, ...

Complex method for extraction of gas-condensate liquids and liquefaction of natural gas

FIELD: oil and gas industry. SUBSTANCE: cooling and partially condensing an incoming stream containing light hydrocarbons in one or more heat exchangers. Partially condensed stream is introduced into cold gas/liquid separator producing a gaseous stream extracted from the top and the bottom streams, which are introduced into a fractionating system containing (a) fractionating column of light fractions and fractionating column of heavy fractions or (b) methane-stripping column. The gaseous stream extracted from the top is expanded and introduced into (a) the lower zone of the fractionating column of light fractions or (b) the upper zone of the methane-stripping column. A stream of bottom liquid (b) is introduced in the (a) fractionating column of heavy fractions at its intermediate point or (b) to the methane-stripping column at its intermediate point. The stream of liquid products is removed from the bottom portion of the fractionating column of heavy fractions or (b) the bottom portion of the methane-stripping column. The top gaseous stream(a) from of the fractionating column of light fraction s or methane-stripping column (b) is removed. The stream of the bottom liquid is removed from the bottom zone of the fractionating column of light fractions and introduced into the upper zone of the fractionating column of heavy fractions. If the system contains a fractionating column of light fractions and a fractionating column of heavy fractions, by indirect heat exchange with the first portion of the gaseous stream taken from above the fractionating column of light fractions is cooled and partially condensed from the top of gaseous stream of the fractionating column of heavy fractions and introduced into the fractionating column of light fractions. A second portion of the gas stream extracted from above the gas stream from the fractionating column of light fractions is removed, cooled and partially condensed by indirect heat exchange. Partially liquefied side-cut ...

IMPROVED METHOD AND SYSTEM FOR COOLING A HYDROCARBON FLOW USING A REFRIGERANT IN THE GAS PHASE

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2019 112 456 A (51) МПК F25J 1/02 (2006.01) F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2019112456, 24.04.2019 (71) Заявитель(и): ЭР ПРОДАКТС ЭНД КЕМИКАЛЗ, ИНК. (US) Приоритет(ы): (30) Конвенционный приоритет: 27.04.2018 US 15/964,377 Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" Стр.: 1 A 2 0 1 9 1 1 2 4 5 6 R U A (57) Формула изобретения 1. Способ сжижения сырьевого потока природного газа с получением готового СПГ, причем способ включает в себя: (a) пропускание первого сырьевого потока природного газа через и охлаждение первого сырьевого потока природного газа на теплой стороне части из множества секций или всех из множества секций теплообменника, таким образом, чтобы предварительно охлаждать и сжижать первый сырьевой поток природного газа, причем множество секций теплообменника включает в себя первую секцию теплообменника, в которой поток природного газа предварительно охлаждается, и вторую секцию теплообменника, в которой поток предварительно охлажденного природного газа из первой секции теплообменника сжижают с получением первого потока сжиженного природного газа; (b) мгновенное испарение первого потока сжиженного природного газа, отводимого из второй секции теплообменника, с образованием газа мгновенного испарения и готового СПГ, и отделение газа мгновенного испарения от готового СПГ таким образом, чтобы получить поток газа мгновенного испарения и поток готового СПГ; (c) сжатие потока газа мгновенного испарения и рециркуляцию сжатого газа мгновенного испарения обратно в первый сырьевой поток природного газа; (d) циркуляцию метансодержащего хладагента в контуре охлаждения, включающем в себя множество секций теплообменника, компрессорную линию, содержащую множество компрессоров и/или ступеней сжатия и один или большее количество промежуточных охладителей и/или выходных охладителей, ...

BOG (boil-off gas) reliquefaction circulation system for LNG (liquefied Natural gas) ship based on mixed working medium refrigeration technology

本发明涉及一种基于混合工质制冷技术的LNG船用BOG再液化循环系统，包括主冷循环与再液化循环，再液化循环通过多级换热器与主冷循环中的混合工质换热，多级换热器包括至少一用于气液冷剂共同换热的中间换热器及一用于气态冷剂换热的低温换热器；再液化循环包括原料气流动方向上顺次布设的常温增压机、BOG冷却器、多级换热器、第一节流装置、气液分离器及LNG储罐，LNG储罐产生的BOG先后进入低温换热器及中间换热器中与混合工质换热升温后流通至常温增压机进口端形成回路，BOG冷却器出口端的中低温BOG先后进入中间换热器及低温换热器中逐级降温至液化，本申请再液化系统实现BOG近常温增压的同时，有效利用混合冷剂及BOG冷能。

Improved multi-pressure mixed refrigerant cooling system

描述用于提高具有多个压力水平的混合制冷剂预冷系统的天然气液化过程的容量和效率的系统和方法包括冷却压缩的混合制冷剂流并将冷却的压缩混合制冷剂流分离成蒸气和液体部分。液体部分为第一预冷却热交换器提供制冷负荷。蒸汽部分被进一步压缩、冷却和冷凝，并用于为第二预冷却热交换器提供制冷负荷。将与液化天然气分离的闪蒸气体加热并与天然气进料流合并。

Method for refrigerating liquefied gas and installation therefor

본 발명은 (a) 수집된 제일기본분획(4)에서와, (b) 가열되고, 압축기(K1)에서 압축되고 수집된 제일압축분획(5)으로 냉각되는 제일상부분획(3)에서 LNG(1)을 냉각, 팽창과 분리시키고; 제이압축분획(6)을 연료가스(5)로부터 인출하고, 냉각한 다음 냉각되고 팽창된 LNG(1)과 혼합하여서 하는 제일단계로 이루어지는 압력하의 액화천연가스(1)를 냉각시키는 방법에 관한 것이다. 본 발명은 제이압축분획(6)을 압축하고 냉각하고, 유출물(8)을 인출하고 냉각하고, 팽창시키고 압축기(K1)에 주입하여서 하는 제이단계로 이루어짐을 특징으로 한다. 또한 본 발명에는 다른 구성도 기술되어 있다. The present invention relates to LNG (a) in the first primary fraction (4) collected and (b) in the first upper fraction (3) which is heated and cooled by the first compression fraction (5) that is heated and compressed and collected by the compressor (K1). Cooling, expanding and separating 1); And a method for cooling the liquefied natural gas (1) under pressure which comprises the first compression fraction (6) withdrawn from the fuel gas (5), cooled, and then mixed with the cooled and expanded LNG (1). . The present invention is characterized in that it consists of a second step by compressing and cooling the second compression fraction (6), withdrawing and cooling the effluent (8), expanding and injecting it into the compressor (K1). The present invention also describes other configurations.

Patent RU2018133711A3

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2018 133 711 A (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2018133711, 25.09.2018 (71) Заявитель(и): ЭР ПРОДАКТС ЭНД КЕМИКАЛЗ, ИНК. (US) Приоритет(ы): (30) Конвенционный приоритет: 28.09.2017 US 15/718,068 Адрес для переписки: 129090, Москва, ул. Большая Спасская, д. 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" Стр.: 1 A 2 0 1 8 1 3 3 7 1 1 R U A (57) Формула изобретения 1. Способ, включающий в себя: (a) охлаждение потока углеводородного сырья, содержащего углеводородную текучую среду, сырьевого потока второго хладагента, содержащего второй смешанный хладагент, и по меньшей мере одного потока первого хладагента, содержащего первый смешанный хладагент, путем непрямого теплообмена с первым смешанным хладагентом на каждом из множества участков теплообмена подсистемы предварительного охлаждения с получением потока предварительно охлажденных углеводородов, потока предварительно охлажденного второго хладагента, который является по меньшей мере частично конденсированным, и множества потоков парообразного первого хладагента, причем подсистема предварительного охлаждения включает в себя множество участков теплообмена и подсистему сжатия, (b) подачу первого входящего потока на первый участок (260) теплообмена предварительного охлаждения при первом давлении на входе и второго входящего потока на первый участок теплообмена предварительного охлаждения при втором давлении на входе, которое выше первого давления на входе, причем каждый из первого и второго входящих потоков содержит первый смешанный хладагент, и, при этом, первый смешанный хладагент имеет первую композицию на входе в первом входящем потоке и вторую композицию на входе во втором входящем потоке, причем первая композиция на входе отличается от второй композиции на входе; (c) отведение первого потока парообразного первого хладагента с первого участка теплообмена предварительного ...

Device for liquefaction of hydrocarbon feed stream (versions)

FIELD: liquefied natural gas.SUBSTANCE: gas liquefaction system includes a cooling system with mixed coolant and several pressure levels, which include cooling of compressed mixed coolant flow and separation of cooled compressed mixed coolant flow into vapor and liquid parts. Liquid part ensures cooling capacity of the first pre-cooling heat exchanger. Steam-like part is additionally compressed, cooled and condensed and used to ensure cooling capacity of the second pre-cooling heat exchanger. Gas of flash evaporation, separated from liquefied natural gas, is heated and combined with natural gas flow.EFFECT: technical result is increased throughput capacity of natural gas liquefaction device.19 cl, 1 tbl, 6 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 724 091 C2 (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F25J 1/0022 (2020.02); F25J 1/0052 (2020.02); F25J 1/0055 (2020.02); F25J 1/008 (2020.02); F25J 1/0217 (2020.02); F25J 1/0219 (2020.02); F25J 1/0267 (2020.02); F25J 1/0291 (2020.02); F25J 1/0292 (2020.02); F25J 1/0294 (2020.02); F25J 2220/62 (2020.02); F25J 2270/902 (2020.02) (21)(22) Заявка: 2018133713, 25.09.2018 25.09.2018 Дата регистрации: Приоритет(ы): (30) Конвенционный приоритет: 28.09.2017 US 15/718,132 (43) Дата публикации заявки: 25.03.2020 Бюл. № 9 2 7 2 4 0 9 1 R U Адрес для переписки: 129090, Москва, ул. Большая Спасская, д. 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) УСТРОЙСТВО ДЛЯ СЖИЖЕНИЯ ПОТОКА УГЛЕВОДОРОДНОГО СЫРЬЯ (ВАРИАНТЫ) (57) Реферат: Изобретение относится к сжижению Парообразную часть дополнительно сжимают, природного газа. Система сжижения газа охлаждают и конденсируют и используют для включает систему предварительного охлаждения обеспечения холодопроизводительности второго со смешанным хладагентом и несколькими теплообменника предварительного охлаждения. уровнями давления, которые включают Газ мгновенного испарения, отделенный от ...

Method of and device for generation of cooled hydrocarbon flow

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

METHOD AND DEVICE FOR REMOVING NITROGEN FROM CRYOGENIC HYDROCARBON COMPOSITION

1. Способ удаления азота из криогенной углеводородной композиции, содержащей азот- и метансодержащую жидкую фазу, причем данный способ включает в себя:- обеспечение криогенной углеводородной композиции, содержащей азот- и метансодержащую жидкую фазу при исходном давлении от 1 до 2 бар абс. (0,1-0,2 МПа);- отбор побочного пара из криогенной углеводородной композиции;- сжатие указанного побочного пара до давления обработки в диапазоне от 2 до 15 бар абс. (0,2-1,5 МПа), тем самым получая сжатый пар;- образование частично сконденсированного промежуточного потока из сжатого пара, содержащего сконденсированную фракцию и паровую фракцию, причем указанное образование включает в себя частичную конденсацию сжатого пара с помощью теплообмена сжатого пара с потоком вспомогательного хладагента и, таким образом, поступление тепла от сжатого пара в поток вспомогательного хладагента в режиме охлаждения;- отделение сконденсированной фракции от паровой фракции в первом газожидкостном сепараторе, при давлении сепарации от 2 до 15 бар абс. (0,2-1,5 МПа);- отведение паровой фракции из первого газожидкостного сепаратора в виде отходящего газа, причем указанная паровая фракция обладает теплотворной способностью;- отведение сконденсированной фракции из первого газожидкостного сепаратора;- сброс давления сконденсированной фракции до давления не ниже, чем исходное давление, тем самым образуя порцию рециркулята сниженного давления;- введение порции рециркулята сниженного давления в криогенную углеводородную композицию;- корректировку режима охлаждения для регулирования теплотворной способности паровой фракции, отводимой из первого газожид РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК F25J 1/00 (11) (13) 2014 125 539 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2014125539/06, 22.11.2012 (71) Заявитель(и): ШЕЛЛ ИНТЕРНЭШНЛ РИСЕРЧ МААТСХАППИЙ Б.В. (NL) Приоритет(ы): (30) Конвенционный приоритет: 25.11.2011 EP 11190671.5 (85) Дата начала ...

Method of liquefying natural gas

FIELD: chemistry. ^ SUBSTANCE: at the first step of the method, a first fraction of incoming gas is taken, compressed to temperature higher than or equal to 1500 pounds/kilo inch, cooled and expanded to lower pressure in order to cool said first fraction. The remaining fraction of the initial stream is cooled via indirect heat exchange with the expanded first fraction in a first heat exchange process. At the second step, the separated stream containing flash evaporation vapour is compressed, cooled and expanded to lower pressure, thus providing another cold stream. This cold stream is used to cool the remaining stream of incoming gas in a second indirect heat exchange process. The expanded stream coming out of the second heat exchange process is used for further cooling at the first step of indirect heat exchange. The rest of the incoming gas is then expanded to lower pressure, thereby partially liquefying that stream of incoming gas. The liquefied fraction of this stream is taken from the process in form of liquefied natural gas, whose temperature corresponds to boiling point pressure temperature. ^ EFFECT: high efficiency. ^ 22 cl, 11 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 406 949 (13) C2 (51) МПК F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2008108998/06, 24.05.2006 (24) Дата начала отсчета срока действия патента: 24.05.2006 (43) Дата публикации заявки: 20.09.2009 (45) Опубликовано: 20.12.2010 Бюл. № 35 (56) Список документов, цитированных в отчете о поиске: US 6763680 B2, 20.07.2004. US 6722157 B1, 20.04.2004. US 2004255616 A1, 23.12.2004. US 4740223 A, 26.04.1988. RU 2253809 C2, 10.06.2005. 2 4 0 6 9 4 9 R U (86) Заявка PCT: US 2006/020121 (24.05.2006) C 2 C 2 (85) Дата перевода заявки PCT на национальную фазу: 11.03.2008 (87) Публикация PCT: WO 2007/021351 (22.02.2007) Адрес для переписки: 129090, Москва, ул.Б.Спасская, 25, стр.3, ООО " ...

Improved method and system for cooling a hydrocarbon flow using a gas-phase coolant

FIELD: gas industry.SUBSTANCE: invention relates to liquefaction of a natural gas feed stream using a methane-containing coolant. Method and systems use a cooling loop and cycle with two or more turbo-expander for expansion of two or more flows of gaseous coolant to different pressure values, to provide cold flows of at least a predominantly gaseous coolant at different pressure values, which are used to ensure cooling capacity for preliminary cooling and liquefaction of natural gas. Obtained liquefied natural gas flow is then subjected to instantaneous evaporation to produce finished LNG and flash gas, note here that flash gas is recycled into natural gas feed stream.EFFECT: technical result is higher efficiency of liquefaction of gas.17 cl, 5 dwg, 1 tbl РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 743 094 C2 (51) МПК F25J 1/02 (2006.01) F25J 1/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F25J 1/0022 (2020.02); F25J 1/0047 (2020.02); F25J 1/005 (2020.02); F25J 1/0052 (2020.02); F25J 1/0072 (2020.02); F25J 1/0082 (2020.02); F25J 1/0092 (2020.02); F25J 1/0092 (2020.02); F25J 1/0204 (2020.02); F25J 1/0212 (2020.02); F25J 1/0214 (2020.02); F25J 1/0263 (2020.02); F25J 1/0288 (2020.02) (21)(22) Заявка: 2019112456, 24.04.2019 24.04.2019 15.02.2021 Приоритет(ы): (30) Конвенционный приоритет: 27.04.2018 US 15/964,377 (43) Дата публикации заявки: 26.10.2020 Бюл. № 30 (56) Список документов, цитированных в отчете о поиске: CN 105823304 A, 03.08.2016. US 2014/ 083132 A1, 27.03.2014. US 2016/327335 A1, 10.11.2016. SU 1355138 A3, 23.11.1987. US 2016/ 0313057 A1, 27.10.2016. 2 7 4 3 0 9 4 R U Адрес для переписки: 129090, Москва, ул. Б.Спасская, 25, строение 3, ООО "Юридическая фирма Городисский и Партнеры" (54) УЛУЧШЕННЫЙ СПОСОБ И СИСТЕМА ДЛЯ ОХЛАЖДЕНИЯ УГЛЕВОДОРОДНОГО ПОТОКА С ПРИМЕНЕНИЕМ ХЛАДАГЕНТА В ГАЗОВОЙ ФАЗЕ (57) Реферат: Изобретение относится к сжижению сырьевого с целью обеспечения холодопроизводительности ...

Cryogenic industrial gas liquefaction with hybrid refrigeration generation

一种液化工业气体的方法，其中所需的部分冷量由多组分制冷剂循环产生，部分冷量通过或者使一部分工业气体或者一部分多组分制冷剂透平膨胀来产生。

Lng production with nitrogen removal

FIELD: cryogenic technology. SUBSTANCE: invention relates to cryogenic technology. A method and system for liquefying the supplied natural gas stream and removing nitrogen from it are proposed. The natural gas stream is cooled and liquefied in the main heat exchanger due to indirect heat exchange with the first refrigerant, thus forming the first LNG stream. The first LNG stream is expanded and fed into the distillation column. The flow of nitrogen-depleted bottom liquid is diverted from the distillation column to form a second, nitrogen-depleted LNG stream. The flow of nitrogen-enriched steam of the upper fraction is heated in the upper heat exchanger. They are compressed, liquefied due to indirect heat exchange with the first refrigerant, supercooled in the upper heat exchanger due to indirect heat exchange with nitrogen-enriched steam of the upper fraction and the recirculating flow formed from the first part of the heated steam of the upper fraction is expanded and fed it into the distillation column. The upper heat exchanger is separated from the main heat exchanger, and the entire cooling capacity for the upper heat exchanger is provided by heating the flow of nitrogen-enriched steam of the upper fraction. EFFECT: invention makes it possible to simplify the liquefaction system. 20 cl, 5 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 764 820 C1 (51) МПК F25J 1/00 (2006.01) F25J 3/02 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F25J 1/0022 (2021.08); F25J 3/0209 (2021.08); F25J 3/0233 (2021.08) (21)(22) Заявка: 2021105989, 10.03.2021 (24) Дата начала отсчета срока действия патента: Дата регистрации: 21.01.2022 13.03.2020 US 16/818,168 (45) Опубликовано: 21.01.2022 Бюл. № 3 2 7 6 4 8 2 0 R U (54) ПРОИЗВОДСТВО СПГ С УДАЛЕНИЕМ АЗОТА (57) Реферат: Изобретение относится к криогенной технике. непрямого теплообмена с первым хладагентом, Предложены способ и система для сжижения переохлаждают в верхнем ...

Fuel gas supplying system in ships

연료가스 공급시스템이 개시된다. 본 발명의 실시 예에 의한 연료가스 공급시스템은 액화가스 및 액화가스의 증발가스를 수용하는 저장탱크, 액화가스를 냉각시키는 액화가스 냉각부를 구비하는 액화가스 냉각라인 및 냉매를 가압하는 컴프레서 및 컴프레서를 통과한 냉매를 냉각하는 쿨러를 구비하는 압축기와, 압축기에 의해 가압된 냉매를 감압시키는 팽창기 및 팽창기에 의해 감압된 냉매를 액화가스 냉각부에통과시켜 액화가스와 열교환하는 냉매라인을 포함하여 제공될 수 있다. A fuel gas supply system is disclosed. A fuel gas supply system according to an embodiment of the present invention includes a storage tank for storing a liquefied gas and an evaporated gas of liquefied gas, a liquefied gas cooling line having a liquefied gas cooling section for cooling the liquefied gas, a compressor for compressing the refrigerant and a compressor And a refrigerant line passing through the liquefied gas cooling unit and performing heat exchange with the liquefied gas, the compressor comprising a cooler for cooling the passed refrigerant, an expander for reducing the pressure of the refrigerant pressurized by the compressor, and a refrigerant that is reduced in pressure by the expander, .

Gas liquefaction method

Improved multiple pressure mixed refrigerant cooling system

다중 압력을 갖는 혼합된 냉매 사전 냉각 시스템을 갖는 천연 가스 액화 공정의 용량 및 효율을 증가시키기 위해 기재된 시스템 및 방법은 압축된 혼합된 냉매 스트림을 냉각하는 것과, 냉각된 혼합된 냉매 스트림을 증기 및 액체 부분으로 분리하는 것을 포함한다. 액체 부분은 냉동 듀티를 제 1 사전 냉각 열교환기에 제공한다. 증기 부분은 냉동 듀티를 제 2 사전 냉각 열교환기에 제공하기 위해 추가로 압축되고, 냉각되고, 응축되고, 사용된다. 액화된 천연 가스로부터 분리된 플래시 가스는 따뜻해지고, 천연 가스 공급 스트림과 조합된다.

Method and apparatus for removing nitrogen from a cryogenic hydrocarbon composition

질소와 메탄-함유 액상을 포함하는 극저온 탄화수소 조성물로부터 질소가 제거된다. 1-2 bara 사이의 낮은 압력에서 극저온 탄화수소 조성물로부터 부산물 증기가 2-15bara 사이 범위의 분리압력으로 압축된다. 그와같이 압축 증기는, 보조냉매 스트림에 대해 압축 증기를 열교환하고 이로써 압축 증기의 열을 쿨링 듀티에서 보조냉매 스트림으로 전달하여 부분적으로 액화된다. 부분적으로 액화된 압축 증기의 응축 분획은 감압되고 적어도 그 일부분이 극저온 탄화수소 조성물에 재주입된다. 부분적으로 액화된 압축 증기의 비응축된 증기분획으로 이루어지는 오프가스는 제 1 가스/액체 분리기로부터 배출된다. 쿨링 듀티는 배출되는 증기 분획의 발열량을 조절하도록 조정된다. Nitrogen is removed from the cryogenic hydrocarbon composition comprising nitrogen and a methane-containing liquid phase. At low pressure between 1-2 bara, the byproduct vapor from the cryogenic hydrocarbon composition is compressed to a separation pressure in the range of 2-15 bara. As such, the compressed vapor is partially liquefied by heat exchanging the compressed vapor against the auxiliary refrigerant stream, thereby transferring the heat of the compressed vapor from the cooling duty to the auxiliary refrigerant stream. The condensed fraction of the partially liquefied compressed vapor is reduced and at least a portion thereof is re-injected into the cryogenic hydrocarbon composition. The off-gas comprising the uncondensed vapor fraction of the partially liquefied compressed vapor is discharged from the first gas / liquid separator. The cooling duty is adjusted to regulate the calorific value of the discharged steam fraction.

Improved multiple pressure mixed refrigerant cooling process

다중 압력을 갖는 혼합된 냉매 사전 냉각 시스템을 갖는 천연 가스 액화 공정의 용량 및 효율을 증가시키기 위해 기재된 시스템 및 방법은 압축된 혼합된 냉매 스트림을 냉각하는 것과, 냉각된 혼합된 냉매 스트림을 증기 및 액체 부분으로 분리하는 것을 포함한다. 액체 부분은 냉동 듀티를 제 1 사전 냉각 열교환기에 제공한다. 증기 부분은 냉동 듀티를 제 2 사전 냉각 열교환기에 제공하기 위해 추가로 압축되고, 냉각되고, 응축되고, 사용된다. 액화된 천연 가스로부터 분리된 플래시 가스는 따뜻해지고, 천연 가스 공급 스트림과 조합된다. The described systems and methods for increasing the capacity and efficiency of natural gas liquefaction processes with mixed refrigerant pre-cooling systems with multiple pressures include cooling a compressed mixed refrigerant stream and converting the cooled mixed refrigerant stream into vapor and liquid. Includes dividing into parts. The liquid portion provides refrigeration duty to the first pre-cooled heat exchanger. The vapor portion is further compressed, cooled, condensed and used to provide refrigeration duty to the second pre-cooled heat exchanger. The flash gas separated from the liquefied natural gas is warmed and combined with the natural gas feed stream.

A process for separating a multi-component pressurized feed stream using distillation

A PROCESS IS DISCLOSED TO REMOVE A HIGH-VOLATILITY COMPONENT, SUCH AS NITROGEN, FROM A FEED STREAM RICH IN METHANE TO PRODUCE A PRODUCT SUBSTANTIALLY FREE OF THE HIGH-VOLATILITY COMPONENT. THE FEED STREAM (10) IS EXPANDED AND FED TO A PHASE SEPARATOR WHICH PRODUCES A VAPOR STREAM AND A LIQUID STREAM. THE VAPOR STREAM (22) IS ENRICHED IN THE VOLATILE COMPONENT. THE LIQUID STREAM, WHICH IS LEAN IN THE VOLATILE COMPONENTAND RICH IN METHANE, IS PUMPED TO A HIGHER PRESSURE AND HEATED TO PRODUCE A PRESSURIZED LIQUEFIED PRODUCT STREAM HAVING A PRESSURE SUFFICIENT FOR THE PRODUCT STREAM TO BE AT OR BELOW ITS BUBBLE POINT AND HAVING A TEMPERATURE ABOVE ABOUT - 112?C. (-170?F.). FIGURE 1

Refrigeration process for liquefaction of natural gas.

A PROCESS IS DISCLOSED FOR CONVEYING GAS STREAM RICH IN METHANE, SUCH AS NATURAL GAS. IN THE FIRST STEP OF THE PROCESS, GAS IS SUPPLIED TO A PIPELINE AT AN ENTRY PRESSURE THAT IS SUBSTANTIALLY HIGHER THAN THE OUTPUT PRESSURE OF THE PIPELINE. THE DROP IN PRESSURE IN THE PIPELINE CAUSES A LOWERING OF THE GAS TEMPERATURE, PREFERABLY TO A TEMPERATURE BELOW ABOUT -29°C. (-20°F.). THE ENTRY PRESSURE OF THE GAS TO THE PIPELINE IS CONTROLLED TO ACHIEVE A PREDETERMINED OUTPUT PRESSURE OF THE GAS FROM THE PIPELINE. OUTPUT GAS FROM THE PIPELINE IS THEN LIQUEFIED TO PRODUCE LIQUEFIED GAS HAVING A TEMPERATURE ABOVE ABOUT -112°C. (-170°F.) AND A PRESSURE SUFFICIENT FOR THE LIQUID TO BE AT OR BELOW ITS BUBBLE POINT TEMPERATURE. THE PRESSURIZED LIQUEFIED GAS IS THEN FURTHER TRANSPORTED IN A SUITABLE CONTAINER. (

Integrated process for ngl (natural gas liquids recovery) and lng (liquefaction of natural gas)

The invention relates to an integrated process and apparatus for liquefaction of natural gas and recovery of natural gas liquids. In particular, the improved process and apparatus reduces the energy consumption of a Liquefied Natural Gas (LNG) unit by using a portion of the already cooled overhead vapor from a fractionation column from an NGL (natural gas liquefaction) unit to, depending upon composition, provide, for example, reflux for fractionation in the NGL unit and/or a cold feed for the LNG unit, or by cooling, within the NGL unit, a residue gas originating from a fractionation column of the NGL unit and using the resultant cooled residue gas to, depending upon composition, provide, for example, reflux/feed for fractionation in the NGL and/or a cold feed for the LNG unit, thereby reducing the energy consumption of the LNG unit and rendering the process more energy-efficient.

multi-component refrigeration process for liquefaction of natural gas

본 발명은 가스 스트림의 액화가 폐 루우프 다중 성분 냉동 시스템(45)에 의해 냉각되는 열 교환기(33)에서 유발되어 약 -112℃(-170℉) 이상의 온도 및 액체 생성물을 이의 기포점 또는 그 미만으로 존재하도록 하기에 충분한 압력을 갖는 메탄이 풍부한 액체 생성물이 제조되는, 메탄이 풍부한 가압 가스 스트림(10)의 액화 방법에 관한 것이다. 이어서, 액화 가스 생성물을 약 -112℃(-170℉) 이상의 온도에서 저장수단(50)으로 도입시킨다. The invention contemplates that the liquefaction of the gas stream is caused in a heat exchanger 33 cooled by a closed loop multi-component refrigeration system 45 to bring the temperature and liquid product above -112 ° C (-170 ° F) to or below its bubble point. A method of liquefying a methane-rich pressurized gas stream (10) in which a methane-rich liquid product having a pressure sufficient to be present is produced. The liquefied gas product is then introduced into the storage means 50 at a temperature of at least about −112 ° C. (−170 ° F.).

Method and apparatus for removing nitrogen from a cryogenic hydrocarbon composition

Nitrogen is removed from a cryogenic hydrocarbon composition comprising nitrogen and a methane-containing liquid phase. A by-product vapour from the cryogenic hydrocarbon composition, at a low pressure of between and 2 bar absolute, is compressed to a separation pressure in the range of between 2 and 15 bar absolute. The such compressed vapour is partially liquefied by heat exchanging the compressed vapour against an auxiliary refrigerant stream and thereby passing heat from the compressed vapour to the auxiliary refrigerant stream at a cooling duty. The condensed fraction of the partially liquefied compressed vapour is depressurized and at least a portion of it is reinjected into the cryogenic hydrocarbon composition. An off gas consisting of a, non condensed, vapour fraction of the partially liquefied compressed vapour is discharged from the first gas/liquid separator. The cooling duty is adjusted to regulate a heating value of the vapour fraction being discharged.

Method of treating a liquefied natural gas stream obtained by cooling using a first cooling cycle and associated apparatus

【解決手段】本発明は、LNG の流れ(11)を第１熱交換器(19)内の冷却媒体(83)で冷却する方法に関する。冷却媒体(83)は、第１サイクル(15)から独立した第２半開放冷却サイクル(21)に置かれる。前記方法は、冷却されたLNG の流れ(59)を蒸留塔(49)に導入するステップと、塔(49)の上部のガスの流れ(69)を回収するステップとを備える。第２冷却サイクル(21)は、ガスの上部の流れ(69)の一部から冷却媒体の流れ(73)を形成するステップと、冷却媒体の流れ(73)を高圧まで圧縮するステップと、その後、主に液体の冷却する流れ(83)を形成するために、圧縮された冷却媒体の流れ(75)の一部(81)を膨張させるステップとを含む。主に液体の流れ(83)は第１熱交換器(19)で蒸発する。

METHOD FOR COOLING A SINGLE OR MULTICOMPONENT FLOW

1. Способ охлаждения одно- или многокомпонентного потока, в частности, обогащенной углеводородами фракции, косвенным теплообменом со смесью охлаждающего средства в циркуляционном контуре смеси охлаждающего средства, причем смесь охлаждающего средства сжимают по меньшей мере в две ступени и разделяют на низкокипящую сжатую до конечного давления циркуляционного контура смеси охлаждающего средства фракцию смеси охлаждающего средства и по меньшей мере одну высококипящую сжатую до промежуточного давления фракцию смеси охлаждающего средства, отличающийся тем, что высококипящую фракцию (5) смеси охлаждающего средства нагнетают (Р11) до давления низкокипящей фракции (8) смеси охлаждающего средства и перед косвенным теплообменом (Е1) или непосредственно в его начале объединяют с низкокипящей фракцией (8) смеси охлаждающего средства.2. Способ по п.1, отличающийся тем, что нагнетание (Р11) высококипящей фракции (5) смеси охлаждающего средства проводят в одну или несколько ступеней.3. Способ по п.1 или 2, отличающийся тем, что объединение или соответственно смешение высококипящей (5') и низкокипящей фракций (8) смеси охлаждающего средства проводят в специально для этого сформированной области теплообменника (Е1). РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК F25J 1/00 (11) (13) 2012 104 233 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2012104233/06, 07.02.2012 (71) Заявитель(и): ЛИНДЕ АКЦИЕНГЕЗЕЛЛЬШАФТ (DE) Приоритет(ы): (30) Конвенционный приоритет: 08.02.2011 DE 102011010633.2 Адрес для переписки: 129090, Москва, ул. Б. Спасская, 25, стр.3, ООО "Юридическая фирма Городисский и Партнеры" A 2 0 1 2 1 0 4 2 3 3 R U Стр.: 1 A (57) Формула изобретения 1. Способ охлаждения одно- или многокомпонентного потока, в частности, обогащенной углеводородами фракции, косвенным теплообменом со смесью охлаждающего средства в циркуляционном контуре смеси охлаждающего средства, причем смесь охлаждающего средства сжимают по меньшей мере ...