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61. 发明公开

KR1020120067577A 증발가스 재액화 장치 및 이를 포함하는 연료 공급 시스템 有权
标题翻译：锅炉燃气和燃料供应系统的装置装置
公开(公告)号：KR1020120067577A
公开(公告)日：2012-06-26
申请号：KR1020100129058
申请日：2010-12-16
申请人： 삼성중공업 주식회사
发明人： 이종철 , 김승혁
IPC分类号： F25J1/02 , F25J3/02
CPC分类号： F25J1/0025 , F25J1/0045 , F25J1/005 , F25J1/0072 , F25J1/0204 , F25J1/023 , F25J1/0268 , F25J1/0277 , F25J2230/04 , F25J2230/30 , F25J2235/60 , F25J1/0257 , F17C6/00 , F17C9/02 , F25B39/04 , F25J3/0214 , F25J2210/42 , F25J2210/90
摘要： PURPOSE: An apparatus for liquefaction of boil-off gas and a fuel feeding system including thereof are provided to reduce weight and establishment area of the apparatus for liquefaction of boil-off gas. CONSTITUTION: An apparatus for liquefaction of boil-off gas(10) is for re-liquefying evaporative gas of a LNG storage tank(3). A BOG compressor(16) compresses evaporative gas generated from the LNG storage tank. A condenser(14) heat-exchanges with refrigerant in order for the evaporative gas to be liquefied by the BOG compressor. In the condenser, the evaporative gas generated from the LNG storage tank, the compressed evaporative gas, and the compacted refrigerant are heat-exchanged.
摘要翻译：目的：提供一种用于液化沸腾气体的装置和包括其的燃料供给系统，以减少用于液化蒸发气体的装置的重量和建立面积。构成：用于液化蒸发气体（10）的装置用于重新液化LNG储罐（3）的蒸发气体。 BOG压缩机（16）压缩从LNG储罐产生的蒸发气体。冷凝器（14）与制冷剂热交换，以便蒸汽气体被BOG压缩机液化。在冷凝器中，从LNG储罐，压缩的蒸发气体和压实的制冷剂产生的蒸发气体被热交换。

62. 发明公开

KR1020090106740A 연료가스 공급과 액화 천연가스 생산이 동시에 가능한 액화천연가스 생산 장치 有权
标题翻译：燃气供应和液化天然气生产同时运行的液化生产设备
公开(公告)号：KR1020090106740A
公开(公告)日：2009-10-12
申请号：KR1020080032061
申请日：2008-04-07
申请人： 현대중공업 주식회사
发明人： 장대준 , 이동훈 , 하종필
IPC分类号： F25J1/00
CPC分类号： F25J1/0022 , F25J1/004 , F25J1/0045 , F25J1/005 , F25J1/0204 , F25J1/023 , F25J1/0249 , F25J2220/62 , F25J2220/64 , F25J2270/16 , F25J1/0257 , F25J3/0214 , F25J2210/62 , F25J2235/02 , F25J2245/02 , F25J2290/60
摘要： PURPOSE: A liquefied natural gas production system is provided to separate liquefied fuel gas from pre-processed natural gas owing to a pre-heater integrated with pre-cooling unit. CONSTITUTION: A liquefied natural gas production system comprises the following units. A first coolant supply line is connected to a coolant storing unit, coolant compressor, first natural gas pre-cooling unit, second natural gas pre-cooling unit, first coolant expander, first natural gas cooler, and second coolant expander in sequential order. A second coolant supply line is connected to the second coolant expander, first natural gas cooler, second natural gas pre-cooling unit, first natural gas pre-cooling unit, and coolant storing unit in sequential order. One end of a coolant collecting line is connected to the first coolant supply line and the other end is connected to the coolant storing unit. The second natural gas cooler is installed on the second coolant supply line. The natural gas supply line is connected to a gas well, second natural gas pre-cooling unit, first natural gas cooler, second natural gas cooler, and a hold in sequential order. A liquefied fuel gas separator is installed on the natural gas supply line. A fuel gas supply line is connected to the liquefied fuel gas separator, second natural gas pre-cooling unit, first natural gas pre-cooling unit, and fuel gas supply unit in sequential order.
摘要翻译：目的：提供液化天然气生产系统，用于将液化燃料气与预处理天然气分离，这是由于与预冷单元集成的预热器。构成：液化天然气生产系统由以下单位组成。第一冷却剂供应管线依次连接到冷却剂存储单元，冷却剂压缩机，第一天然气预冷单元，第二天然气预冷单元，第一冷却剂膨胀器，第一天然气冷却器和第二冷却剂扩张器。第二冷却剂供应管线依次连接到第二冷却剂扩张器，第一天然气冷却器，第二天然气预冷单元，第一天然气预冷单元和冷却剂存储单元。冷却剂汇集线的一端连接到第一冷却剂供应管线，另一端连接到冷却剂储存单元。第二天然气冷却器安装在第二冷却剂供应管线上。天然气供应管线连接到气井，第二天然气预冷单元，第一天然气冷却器，第二天然气冷却器和按顺序连接。液化燃料气体分离器安装在天然气供应管线上。燃料气体供给管路依次连接到液化燃料气体分离器，第二天然气预冷单元，第一天然气预冷单元和燃料气体供应单元。

63. 发明公开

KR1020090100121A 과 냉각과 잠열 교환을 이용한 고효율 해상 액화천연가스생산장치 有权
标题翻译：高效离岸液化天然气生产设备使用底部和热交换器
公开(公告)号：KR1020090100121A
公开(公告)日：2009-09-23
申请号：KR1020080025541
申请日：2008-03-19
申请人： 현대중공업 주식회사
发明人： 장대준 , 이동훈 , 하종필
IPC分类号： F25J1/02
CPC分类号： F25J1/0022 , F25J1/0045 , F25J1/005 , F25J1/0204 , F25J1/023 , F25J1/0278 , F25J2210/04 , F25J2220/62 , F25J2220/64 , F25J2245/02 , F25J2270/16 , F25J1/0257 , F25B40/02 , F25B41/062 , F25B43/00 , F25J3/04787 , F25J2210/62 , F28D20/02
摘要： PURPOSE: A high-efficiency marine LNG producing system is provided to reduce the size of a liquefying device by removing flash gas re-cycling compression equipment. CONSTITUTION: A high-efficiency marine LNG producing system comprises a coolant compressor(101), coolant heat exchanger(102), first supercooling heat exchanger(103), first LPG separator(201), LPG expanding valve(202) and second LPG separator(203). The coolant compressor compresses a coolant inducing liquefaction. The coolant heat exchanger removes the heat generated when a source gas(100) is compressed. The first supercooling heat exchanger vaporizes LPG during reciprocal heat exchanging. The LPG separator separates the LPG into a liquid phase and gas phase. The LPG expanding valve induces an additional drop in temperature. The second LPG separator separates the LPG into the liquid phase and gas phase and transfers them to an LPG/exhaust gas facility(200) and LPG cargo hole(300).
摘要翻译：目的：提供高效率的海洋液化天然气生产系统，通过清除闪燃气体再循环压缩设备来减少液化装置的尺寸。构成：高效率的LNG生产系统包括冷却剂压缩机（101），冷却剂热交换器（102），第一过冷却热交换器（103），第一液化石油气分离器（201），液化石油气膨胀阀（202）和第二液化石油气分离器（203）。冷却剂压缩机压缩引起液化的冷却剂。冷却剂热交换器去除当源气体（100）被压缩时产生的热量。第一过冷热交换器在往复热交换期间使LPG蒸发。 LPG分离器将LPG分离成液相和气相。 LPG膨胀阀引起额外的温度下降。第二个LPG分离器将LPG分离成液相和气相，并将其转移到LPG /废气设备（200）和LPG货物孔（300）。

64. 发明公开

KR1020090098521A 연료가스 공급과 액화 천연가스 생산이 동시에 가능한 액화천연가스 생산 장치 有权
标题翻译：燃油供应和液化天然气生产合并运营的液化生产设备
公开(公告)号：KR1020090098521A
公开(公告)日：2009-09-17
申请号：KR1020080023962
申请日：2008-03-14
申请人： 현대중공업 주식회사
发明人： 장대준 , 이동훈 , 하종필
IPC分类号： F25J3/02
CPC分类号： F25J1/0022 , F25J1/0045 , F25J1/0052 , F25J1/023 , F25J1/0265 , F25J1/0267 , F25J2220/62 , F25J2220/64
摘要： A liquefied natural gas producing apparatus is provided to improve production efficiency without separately supplying refrigerant for a pre-cooling system and to supply fuel gas at the same time producing liquefied natural gas. A liquefied natural gas producing apparatus(1) comprises a natural gas pre-cooler(18), an LPG separator(11), a natural gas liquefier(19), a liquefied natural gas separator(12), a liquefied natural gas feeding pump(14), an LPG feeding pump(13), a fuel gas pre-cooler(17), a refrigerant circulator(20), a bypass line(33) and a liquefied natural gas control valve(16). One side of the LPG feeding pump is connected to the LPG separator by an LPG supply line(31) and the other side is connected to an LPG storage(200).
摘要翻译：提供一种液化天然气生产设备，以提高生产效率，而不需要分别为预冷却系统供应制冷剂，同时供应燃料气体生产液化天然气。一种液化天然气生产设备（1）包括天然气预冷器（18），LPG分离器（11），天然气液化器（19），液化天然气分离器（12），液化天然气输送泵（14），LPG供给泵（13），燃料气体预冷器（17），制冷剂循环器（20），旁通管线（33）和液化天然气控制阀（16）。液化石油气进料泵的一侧通过LPG供应管线（31）连接到LPG分离器，另一侧连接到LPG储存器（200）。

65. 发明授权

KR100740686B1 ＢＯＧ 재액화 장치 失效
标题翻译： BOG RELIQUEFACTION装置
公开(公告)号：KR100740686B1
公开(公告)日：2007-07-18
申请号：KR1020050078588
申请日：2005-08-26
申请人： 신영중공업주식회사
发明人： 홍의석 , 이윤표
IPC分类号： F25J1/02
CPC分类号： F25J1/0025 , F25J1/0045 , F25J1/005 , F25J1/0052 , F25J1/0072 , F25J1/0204 , F25J1/0265 , F25J1/0277 , F25J2210/04 , F25J2230/08 , F25J2230/30 , F25J2240/60 , F25J2245/02
摘要： 본 발명은 기존의 질소의 역브레이튼 싸이클을 이용한 BOG 재액화 장치에서 팽창터빈을 이용하여 질소의 온도를 낮출 경우 질소의 일부가 액화함으로써 팽창터빈의 블레이드를 손상시키는 문제가 발생할 수 있는 종래기술의 문제점을 해결한 것으로서, 본 발명에서는 가압된 질소의 일부만을 추출하여 팽창터빈을 이용 팽창하고 나머지는 질소의 온도를 더 낮춘 후 팽창밸브를 통하여 온도를 강하시킴으로써 액적 발생의 우려없이 질소의 온도를 낮출 수 있는 장점이 있다. 또한, 추출 질소량을 변화시킴으로써 질소싸이클의 운전을 다양하게 할 수 있어 BOG의 동적변화에 쉽게 대응할 수 있다.
BOG, 재액화, 콜드박스, 모듈

66. 发明公开

KR1020070027712A 확장형 용량의 액화 천연 가스 플랜트 有权
标题翻译：可调节能力液化天然气工厂
公开(公告)号：KR1020070027712A
公开(公告)日：2007-03-09
申请号：KR1020077001255
申请日：2005-06-10
申请人： 엑손모빌 업스트림 리서치 캄파니
发明人： 호리츠다니엘제이. , 스톤존비.
IPC分类号： F25J1/00 , F25J5/00
CPC分类号： C10L3/10 , B01D53/1406 , B01D53/1462 , C10L3/102 , C10L3/12 , E05Y2800/205 , F25J1/0022 , F25J1/0042 , F25J1/0045 , F25J1/0052 , F25J1/0057 , F25J1/0214 , F25J1/0242 , F25J1/0259 , F25J1/027 , F25J1/0271 , F25J1/0272 , F25J1/0274 , F25J1/0283 , F25J1/0284 , F25J1/0294 , F25J3/0209 , F25J3/0233 , F25J3/0242 , F25J3/0257 , F25J3/029 , F25J2200/02 , F25J2200/38 , F25J2200/70 , F25J2200/78 , F25J2205/04 , F25J2220/62 , F25J2220/66 , F25J2230/24 , F25J2230/60 , F25J2235/60 , F25J2240/04 , F25J2240/30 , F25J2240/70 , F25J2240/82 , F25J2270/12 , F25J2270/66 , F25J2290/10 , F25J2290/40 , F25J2290/50 , F25J2290/80
摘要： The current invention is related to hydrocarbon fluid processing plants, methods of designing hydrocarbon fluid processing plants, methods of operating hydrocarbon fluid processing plants, and methods of producing hydrocarbon fluids using hydrocarbon fluid processing plants. More particularly, some embodiments of the invention are related to natural gas liquefaction plants, methods of designing natural gas liquefaction plants, methods of operating natural gas liquefaction plants and methods of producing LNG using natural gas liquefaction plants. One embodiment of the invention includes a hydrocarbon fluid processing plant including a plurality of process unit module types, the plurality of process unit module types including at least a first process unit module type including one or more first process unit modules and a second process unit module type including two or more integrated second process unit modules wherein at least one of the first process unit modules and at least one of the second process unit modules are sized at their respective substantially maximum processing efficiency. ® KIPO & WIPO 2007
摘要翻译：本发明涉及碳氢化合物流体加工设备，设计烃类流体加工设备的方法，操作烃类流体加工设备的方法以及使用烃流体加工设备生产烃类流体的方法。更具体地，本发明的一些实施例涉及天然气液化装置，设计天然气液化装置的方法，操作天然气液化装置的方法以及使用天然气液化装置生产LNG的方法。本发明的一个实施例包括包括多个处理单元模块类型的烃流体处理设备，所述多个处理单元模块类型至少包括包括一个或多个第一处理单元模块的第一处理单元模块类型和第二处理单元模块类型，其包括两个或更多个集成的第二处理单元模块，其中第一处理单元模块和至少一个第二处理单元模块中的至少一个以其各自的基本上最大的处理效率来定尺寸。 ®KIPO＆WIPO 2007

67. 发明公开

KR1020070022714A 천연 가스 액화 失效
标题翻译：天然气液化
公开(公告)号：KR1020070022714A
公开(公告)日：2007-02-27
申请号：KR1020067025531
申请日：2005-04-28
申请人： 오르트로프 엔지니어스, 리미티드
发明人： 윌킨슨,존,디. , 린츠,조,티. , 허드슨,행크,엠. , 쿠엘라,카일,티.
IPC分类号： F25J1/00
CPC分类号： F25J1/0216 , F25J1/0022 , F25J1/0035 , F25J1/0045 , F25J1/0052 , F25J1/0057 , F25J1/0205 , F25J1/0214 , F25J1/0239 , F25J3/0209 , F25J3/0233 , F25J3/0238 , F25J3/0242 , F25J3/0247 , F25J2200/02 , F25J2200/04 , F25J2200/30 , F25J2200/70 , F25J2200/74 , F25J2200/78 , F25J2205/04 , F25J2230/08 , F25J2230/20 , F25J2230/60 , F25J2240/02 , F25J2240/30 , F25J2270/02 , F25J2270/12 , F25J2270/60 , F25J2270/66 , F25J2290/40
摘要： 천연 가스의 액화 공정이, 메탄보다 중질인 탄화수소를 주로 함유하는 액체 스트림의 생성과 함께 개시되어 있다. 본 공정에서, 액화시킬 천연 가스 스트림은 부분적으로 냉각시키고, 제1 및 제2 스트림으로 분할한다. 제1 스트림은 추가로 냉각하여 실질적으로 그의 전부를 응축시키고, 중간 압력으로 팽창시키며, 또한 그 후 증류 칼럼으로 제1 중간-칼럼 공급 지점에서 공급한다. 또한, 제2 스트림은 중간압력으로 팽창시키고, 그 후 증류 칼럼으로 제2 하부 중간-칼럼 공급 지점에서 공급한다. 증류 스트림은 제2 스트림의 공급 지점 아래의 칼럼으로부터 인출하고, 냉각하여 그의 적어도 일부를 응축시키고, 환류 스트림을 형성한다. 환류 스트림의 적어도 일부는 증류 칼럼으로 그의 최상부 공급물로써 인도한다. 이 증류 칼럼으로부터의 저부(bottom) 생성물은, 상기 액화 천연 가스의 순도를 감소시키는 메탄보다 중질인 임의의 탄화수소의 대부분을 우세하게 함유한다.
상기 증류 칼럼으로부터의 상기 잔류 가스 스트림은 보다 높은 중간 압력으로 압축하고, 가압하에 냉각하여 이를 응축시키고, 그 후 낮은 압력으로 팽창시켜 액화 천연 가스 스트림을 형성한다.

68. 发明授权

KR100674163B1 Bog reliquefaction apparatus 无效
标题翻译： BOG RELIQUEFACTION APPARATUS
公开(公告)号：KR100674163B1
公开(公告)日：2007-01-29
申请号：KR20060019936
申请日：2006-03-02
IPC分类号： F25J1/02
CPC分类号： F25J1/0277 , F25J1/0025 , F25J1/0045 , F25J1/005 , F25J1/0072 , F25J1/0204 , F25J1/0259 , F25J1/0265 , F25J2210/04 , F25J2230/08 , F25J2230/30
摘要： 본 발명은, BOG 재액화 장치에서 저온부를 구성하는 단위요소들을 단열된 콜드박스 모듈로 제작함으로써 LNG 재액화 장치의 크기를 줄일 수 있으며 질소가스의 극저온 영역을 냉열의 손실 없이 안정적 관리로 할 수 있고 질소 열교환기의 간편한 설계 및 제작이 가능하다. 또한, 질소열교환기와 팽창터빈 입구간의 연결파이프가 짧아지기 때문에 팽창터빈 입구의 상태나 온도에 민감한 영향을 받는 팽창터빈의 출구의 극저온 상태가 안정될 수 있다. 또한 팽창터빈 출구와 BOG 응축기 사이의 연결파이프가 짧아지므로 극저온 질소가스 이송시에 발행하는 온도상승을 최소화시킬 수 있다.
BOG, 재액화, 콜드박스, 모듈
摘要翻译：本发明中，通过使构成在冷箱模块绝缘从BOG再液化装置的低温部，以减少LNG再液化装置的尺寸可以可靠地管理的氮气的极低温度区域而不冷损失的单元的元件，并且可以容易地设计和制造氮换热器。此外，膨胀涡轮机的出口的极低温度状态以接收到的状态或膨胀涡轮入口，其可以被稳定，因为氮热交换器之间的连接配管，膨胀涡轮机入口缩短的温度敏感。另外，由于膨胀涡轮机出口与BOG冷凝器之间的连接管被缩短，所以由低温氮气的传递引起的温度升高可以被最小化。

69. 发明公开

KR1020070011084A 라인믹서를 이용한 ＢＯＧ 재액화 장치 失效
标题翻译：使用线路混合器关闭气体消除装置
公开(公告)号：KR1020070011084A
公开(公告)日：2007-01-24
申请号：KR1020060034975
申请日：2006-04-18
申请人： 신영중공업주식회사
发明人： 홍의석 , 이종석
IPC分类号： F25J1/02
CPC分类号： F25J1/0025 , F25J1/004 , F25J1/0045 , F25J1/005 , F25J1/0052 , F25J1/0072 , F25J1/0208 , F25J1/0265 , F25J1/0292 , F25J2205/30 , F25J2205/90 , F25J2220/62 , F25J2230/08 , F25J2230/30 , F25J2235/60 , F25J2240/60 , F25J1/0257 , F17C6/00 , F25B11/02 , F25B43/00 , F25J1/0258 , F25J2205/02 , F25J2210/60 , F25J2210/90
摘要： A BOG(Boil-Off Gas) reliquefaction apparatus using a line mixer is provided to quickly control the temperature of BOG by rapidly cooling down the BOG by mixing and vaporizing LNG(Liquefied Natural Gas) and the BOG in the line mixer. The BOG reliquefaction apparatus using a line mixer(16) is composed of a BOG compression unit(1) compressing BOG evaporated from the inside of an LNG storage tank(10); an actuating fluid compression unit(4) having plural actuating fluid compressors(41,42,43) and actuating fluid coolers(44,45,46) connected to cool the actuating fluid by repeating compressing and cooling steps; and a cold box unit(2) liquefying the BOG by expanding the actuating fluid of the actuating fluid compression unit at very low temperature and then exchanging heat between the actuating fluid and the BOG in a condenser(20). The BOG reliquefaction apparatus recirculates the BOG liquefied by the cold box unit to the storage tank. The line mixer for mixing the BOG vaporized from the storage tank and the LNG supplied from the outside and a mist removing drum(17) removing the mist remaining in the BOG mixed in the line mixer are installed between the BOG compression unit and the storage tank. The BOG is cooled down in the line mixer by evaporative latent heat of the LNG.
摘要翻译：提供使用线路混合器的BOG（Boil-Off Gas）再液化装置，通过在线路混合器中混合和蒸发LNG（液化天然气）和BOG，快速冷却BOG，快速控制BOG的温度。使用线路混合器（16）的BOG再液化装置由压缩从LNG储罐（10）的内部蒸发的BOG的BOG压缩单元（1）构成。具有多个致动流体压缩机（41,42,43）和致动流体冷却器（44,45,46）的致动流体压缩单元（4），其连接以通过重复的压缩和冷却步骤来冷却致动流体; 以及通过在非常低的温度下膨胀致动流体压缩单元的致动流体然后在冷凝器（20）中在致动流体和BOG之间进行热交换而使BOG液化的冷箱单元（2）。 BOG再液化装置将由冷箱装置液化的BOG再循环到储罐。用于将从储罐蒸发的BOG和从外部供应的LNG混合的管线混合器和除去在混合器中混合的BOG中残留的雾的除雾鼓（17）安装在BOG压缩单元和储罐之间。 BOG通过LNG的蒸发潜热在线路混合器中冷却。

70. 发明公开

KR1020070011074A 작동유체의 유량조절수단을 이용하여 부하 변동 조절이가능한 천연가스 액화장치 失效
标题翻译：使用工作流体的流量控制手段控制负荷变化的天然气液化装置
公开(公告)号：KR1020070011074A
公开(公告)日：2007-01-24
申请号：KR1020060019937
申请日：2006-03-02
申请人： 신영중공업주식회사
发明人： 홍의석 , 장대준 , 이동훈
IPC分类号： F25J1/02
CPC分类号： F25J1/0025 , F25J1/004 , F25J1/0045 , F25J1/005 , F25J1/0052 , F25J1/0072 , F25J1/0208 , F25J1/0265 , F25J1/0292 , F25J2205/30 , F25J2205/90 , F25J2220/62 , F25J2230/08 , F25J2230/30 , F25J2235/60 , F25J2240/60 , F25J1/0022 , B63H21/38 , F17C6/00 , F17C13/00 , F25B11/02 , F25B41/046 , F25B43/00 , F25J1/0257 , F25J1/0258 , F25J2210/60 , Y02T70/5218
摘要： A natural gas liquefaction apparatus capable of controlling load change by using a flow control unit of actuating fluid is provided to control the flow and temperature of the actuating fluid supplied to a cold box unit by installing an expansion turbine and a bypass pipe penetrating through the expansion turbine. The natural gas liquefaction apparatus capable of controlling load change by using a flow control unit(3) of actuating fluid is composed of a natural gas compression unit(1) compressing natural gas generated from a liquid natural gas storage tank(10); an actuating fluid compression unit(4) connected to plural actuating fluid compressors(41,42,43) and actuating fluid coolers(44,45,46) to pressurize and cool down the actuating fluid in a very low temperature refrigerating cycle liquefying the natural gas by repeating pressurizing and cooling steps; a cold box unit(2) liquefying the natural gas by expanding the actuating fluid of the actuating fluid compression unit at very low temperature and then exchanging heat between the actuating fluid and the natural gas in a condenser(20); and the flow control unit having bypass pipes formed at actuating fluid inlet and outlet pipes and controlling flow of the actuating fluid supplied to the cold box unit by recirculating some of the actuating fluid to the actuating fluid compression unit through the bypass pipe. An expansion unit is installed at the bypass pipe of the flow control unit to lower the pressure or temperature of the actuating fluid flowing into the actuating fluid compression unit.
摘要翻译：提供能够通过使用致动流体的流量控制单元来控制负载变化的天然气液化装置，以通过安装膨胀涡轮机和穿过膨胀的旁通管来控制供应给冷箱单元的致动流体的流量和温度涡轮。能够通过使用致动流体的流量控制单元（3）来控制负荷变化的天然气液化装置由压缩从液体天然气储罐（10）产生的天然气的天然气压缩单元（1）构成。连接到多个致动流体压缩机（41,42,43）并且致动流体冷却器（44,45,46）的致动流体压缩单元（4），以在非常低温的制冷循环中加压和冷却致动流体，从而液化天然气重复加压和冷却步骤的气体; 冷箱单元（2）通过在非常低的温度下膨胀致动流体压缩单元的致动流体然后在冷凝器（20）中的致动流体和天然气之间进行热交换来液化天然气; 并且所述流量控制单元具有在致动流体入口和出口管处形成的旁通管，并且通过将一些致动流体通过旁通管再循环到致动流体压缩单元来控制供应到冷箱单元的致动流体的流动。膨胀单元安装在流量控制单元的旁通管上，以降低流入致动流体压缩单元的致动流体的压力或温度。

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