JP6333664B2 - 液化ガス製造設備 - Google Patents
液化ガス製造設備 Download PDFInfo
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- JP6333664B2 JP6333664B2 JP2014163969A JP2014163969A JP6333664B2 JP 6333664 B2 JP6333664 B2 JP 6333664B2 JP 2014163969 A JP2014163969 A JP 2014163969A JP 2014163969 A JP2014163969 A JP 2014163969A JP 6333664 B2 JP6333664 B2 JP 6333664B2
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- 238000004519 manufacturing process Methods 0.000 title claims description 34
- 239000003507 refrigerant Substances 0.000 claims description 129
- 238000001816 cooling Methods 0.000 claims description 47
- 239000012530 fluid Substances 0.000 claims description 6
- 238000007781 pre-processing Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 53
- 239000003949 liquefied natural gas Substances 0.000 description 31
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 16
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 10
- 238000005057 refrigeration Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000003345 natural gas Substances 0.000 description 6
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000001294 propane Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000001273 butane Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
- F25J1/0259—Modularity and arrangement of parts of the liquefaction unit and in particular of the cold box, e.g. pre-fabrication, assembling and erection, dimensions, horizontal layout "plot"
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- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
- F25J1/0022—Hydrocarbons, e.g. natural gas
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- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/003—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production
- F25J1/0047—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle
- F25J1/0052—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the kind of cold generation within the liquefaction unit for compensating heat leaks and liquid production using an "external" refrigerant stream in a closed vapor compression cycle by vaporising a liquid refrigerant stream
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- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
- F25J1/008—Hydrocarbons
- F25J1/0087—Propane; Propylene
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- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0211—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle
- F25J1/0214—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle as a dual level refrigeration cascade with at least one MCR cycle
- F25J1/0215—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle as a dual level refrigeration cascade with at least one MCR cycle with one SCR cycle
- F25J1/0216—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process using a multi-component refrigerant [MCR] fluid in a closed vapor compression cycle as a dual level refrigeration cascade with at least one MCR cycle with one SCR cycle using a C3 pre-cooling cycle
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- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
- F25J1/0281—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc. characterised by the type of prime driver, e.g. hot gas expander
- F25J1/0283—Gas turbine as the prime mechanical driver
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- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
- F25J1/0292—Refrigerant compression by cold or cryogenic suction of the refrigerant gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
- F25J1/0294—Multiple compressor casings/strings in parallel, e.g. split arrangement
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J1/00—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
- F25J1/02—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen ; Details and kind of the refrigeration system used; Integration with other units or processes; Controlling aspects of the process
- F25J1/0243—Start-up or control of the process; Details of the apparatus used; Details of the refrigerant compression system used
- F25J1/0279—Compression of refrigerant or internal recycle fluid, e.g. kind of compressor, accumulator, suction drum etc.
- F25J1/0296—Removal of the heat of compression, e.g. within an inter- or afterstage-cooler against an ambient heat sink
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2220/00—Processes or apparatus involving steps for the removal of impurities
- F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
- F25J2220/64—Separating heavy hydrocarbons, e.g. NGL, LPG, C4+ hydrocarbons or heavy condensates in general
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2220/00—Processes or apparatus involving steps for the removal of impurities
- F25J2220/60—Separating impurities from natural gas, e.g. mercury, cyclic hydrocarbons
- F25J2220/66—Separating acid gases, e.g. CO2, SO2, H2S or RSH
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
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- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2270/00—Refrigeration techniques used
- F25J2270/60—Closed external refrigeration cycle with single component refrigerant [SCR], e.g. C1-, C2- or C3-hydrocarbons
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- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2270/00—Refrigeration techniques used
- F25J2270/66—Closed external refrigeration cycle with multi component refrigerant [MCR], e.g. mixture of hydrocarbons
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- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
- F25J2290/42—Modularity, pre-fabrication of modules, assembling and erection, horizontal layout, i.e. plot plan, and vertical arrangement of parts of the cryogenic unit, e.g. of the cold box
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- F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
- F25J2290/60—Details about pipelines, i.e. network, for feed or product distribution
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Description
圧縮機の駆動源としては従来から例えば80MWもの大型の産業用のガスタービンが用いられている。一方、最近ではガスタービンとして性能及び効率がよい、航空機転用型の例えば25MW〜60MWの小型のガスタービンが開発されており、本発明者は小型のガスタービンを複数用いることにより設計の自由度が高くなると考えている。
しかしながら、小型のガスタービンを複数用いると、特許文献1に示されるレイアウトでは、配管の引き回しが複雑になり、また広いスペースが必要になって、液化ガス製造設備が大型化する。
配管の集合体を保持するように構成されると共に、配管内の流体に対して空冷を行う空冷熱交換器が配置され、上空から見たときに長方形状をなすパイプラック部と、
前記供給ガスを、圧縮された予冷用冷媒を膨張させて予備冷却する予冷熱交換部と、
予冷用冷媒を圧縮する第1の圧縮機と、
前記予冷熱交換部により予冷された供給ガスを、圧縮された主冷媒を膨張させて冷却して液化する主熱交換部と、
この主熱交換部にて熱交換された主冷媒を各々圧縮する第2の圧縮機及び第3の圧縮機と、
前記第2の圧縮機及び第3の圧縮機により圧縮された主冷媒を、圧縮された予冷用冷媒を膨張させて冷却する補助熱交換部と、
予冷用冷媒を圧縮する第4の圧縮機と、を備え、
前記パイプラック部の外側にて当該パイプラック部の一方の長辺に沿って、前記第1の圧縮機、予冷熱交換部、補助熱交換部及び第4の圧縮機がこの順番で配置され、
前記パイプラック部の外側にて当該パイプラック部の他方の長辺に沿って、前記第2の圧縮機、主熱交換部及び第3の圧縮機がこの順番で配置され、
前記予冷熱交換部にて熱交換された予冷用冷媒の配管及び前記補助熱交換部にて熱交換された予冷用冷媒の配管は互いに合流し、合流後の配管が分岐されて前記第1の圧縮機及び第4の圧縮機に接続され、
前記第1の圧縮機にて圧縮された予冷用冷媒の配管及び前記第4の圧縮機にて圧縮された予冷用冷媒の配管は互いに合流し、合流後の配管が分岐されて前記予冷熱交換部及び補助熱交換部に接続され、
前記予冷熱交換部にて冷却された供給ガスの配管は、前記パイプラック部を横断して前記主熱交換部に接続され、
前記第2の圧縮機及び第3の圧縮機にて圧縮された主冷媒の配管は、前記パイプラック部を横断して前記補助熱交換部に接続されていることを特徴とする。
(a)前記第1の圧縮機は、複数設けられていること。前記第2の圧縮機及び第3の圧縮機は、各々複数設けられていること。前記第4の圧縮機は、複数設けられていること。
(b)前記第2の圧縮機にて圧縮された主冷媒の配管及び前記第3の圧縮機にて圧縮された主冷媒の配管は互いに合流し、合流された配管が前記補助熱交換部に接続されていること。
(c)前記供給ガスは、前記パイプラック部の一方の短辺側から供給されて、他方の短辺側から送り出されるように配管が配置され、前記予冷熱交換部にて予冷される前に供給ガスに対して処理を行う前処理部を、前記第2の圧縮機、主熱交換部及び第3の圧縮機の並びに対して、前記一方の短辺側に隣接してパイプラック部の外に設けたこと。
(d)前記予冷熱交換部及び前記補助熱交換部のうちの少なくとも一方と前記主熱交換部とは、前記パイプラック部の短辺方向に沿って見たときに、少なくとも互いの一部が重なっていること。
初めに、本LNG製造設備の概略構成について、図1の平面図を参照しながら説明する。
ここで図1中に示したプロセス配管10が原料のNGまたは製品LNGが流れる配管を示している。また、酸性ガス除去部1、水分除去部2は、本例に係るLNG製造設備の前処理部に相当している。
図2は、既述の予冷熱交換部3と、主冷媒の冷却を行う補助熱交換部8と、これらNGの予冷、及び主冷媒の予備冷却に用いられた予冷用冷媒を圧縮する第1の圧縮機4、第4の圧縮機9と、を示している。
即ち、予冷用冷媒供給配管801より熱交換器80に供給された予冷用冷媒は、直列に接続された熱交換要素81、82、83、84をこの順に流れ、同じく熱交換要素81、82、83、84のチューブ内をこの順に通流する主冷媒との熱交換により主冷媒を冷却する。各熱交換要素81、82、83、84の入口側に設けられた膨張弁811、821、831、841にて予冷用冷媒を断熱膨張させることにより、予冷用冷媒の温度を低下させ、各熱交換要素81、82、83出口の主冷媒の温度を次第に低下させて、最終段の熱交換要素84の出口(熱交換器80の出口)にて例えば−37℃〜−40℃、好ましくは−38℃〜−39℃に冷却された主冷媒を得る。
液化部5は、主冷媒である、例えば窒素、メタン、エタン、プロパンの混合冷媒(MR)を用いて予冷後のNGを液化する。
さらに熱交換器51からは、LNGの液化に用いられた主冷媒が気体の状態で流出する(図3中に「MR(気体)」と記してある)。
なお、既述の重質分除去部は、例えば液化部5に配置される。
100 パイプラック部
101 AFC
102 チューブバンドル
104 予冷用冷媒合流配管
3 予冷熱交換部
4 第1の圧縮機
5 液化部
51 熱交換器
6 第2の圧縮機
7 第3の圧縮機
8 補助熱交換部
9 第4の圧縮機
Claims (7)
- 供給ガスを液化して液化ガスを製造する液化ガス製造設備において、
配管の集合体を保持するように構成されると共に、配管内の流体に対して空冷を行う空冷熱交換器が配置され、上空から見たときに長方形状をなすパイプラック部と、
前記供給ガスを、圧縮された予冷用冷媒を膨張させて予備冷却する予冷熱交換部と、
予冷用冷媒を圧縮する第1の圧縮機と、
前記予冷熱交換部により予冷された供給ガスを、圧縮された主冷媒を膨張させて冷却して液化する主熱交換部と、
この主熱交換部にて熱交換された主冷媒を各々圧縮する第2の圧縮機及び第3の圧縮機と、
前記第2の圧縮機及び第3の圧縮機により圧縮された主冷媒を、圧縮された予冷用冷媒を膨張させて冷却する補助熱交換部と、
予冷用冷媒を圧縮する第4の圧縮機と、を備え、
前記パイプラック部の外側にて当該パイプラック部の一方の長辺に沿って、前記第1の圧縮機、予冷熱交換部、補助熱交換部及び第4の圧縮機がこの順番で配置され、
前記パイプラック部の外側にて当該パイプラック部の他方の長辺に沿って、前記第2の圧縮機、主熱交換部及び第3の圧縮機がこの順番で配置され、
前記予冷熱交換部にて熱交換された予冷用冷媒の配管及び前記補助熱交換部にて熱交換された予冷用冷媒の配管は互いに合流し、合流後の配管が分岐されて前記第1の圧縮機及び第4の圧縮機に接続され、
前記第1の圧縮機にて圧縮された予冷用冷媒の配管及び前記第4の圧縮機にて圧縮された予冷用冷媒の配管は互いに合流し、合流後の配管が分岐されて前記予冷熱交換部及び補助熱交換部に接続され、
前記予冷熱交換部にて冷却された供給ガスの配管は、前記パイプラック部を横断して前記主熱交換部に接続され、
前記第2の圧縮機及び第3の圧縮機にて圧縮された主冷媒の配管は、前記パイプラック部を横断して前記補助熱交換部に接続されていることを特徴とする液化ガス製造設備。 - 前記第1の圧縮機は、複数設けられていることを特徴とする請求項1記載の液化ガス製造設備。
- 前記第2の圧縮機及び第3の圧縮機は、各々複数設けられていることを特徴とする請求項1または2記載の液化ガス製造設備。
- 前記第4の圧縮機は、複数設けられていることを特徴とする請求項1ないし3のいずれか一項に記載の液化ガス製造設備。
- 前記第2の圧縮機にて圧縮された主冷媒の配管及び前記第3の圧縮機にて圧縮された主冷媒の配管は互いに合流し、合流された配管が前記補助熱交換部に接続されていることを特徴とする請求項1ないし4のいずれか一項に記載の液化ガス製造設備。
- 前記供給ガスは、前記パイプラック部の一方の短辺側から供給されて、他方の短辺側から送り出されるように配管が配置され、
前記予冷熱交換部にて予冷される前に供給ガスに対して処理を行う前処理部を、前記第2の圧縮機、主熱交換部及び第3の圧縮機の並びに対して、前記一方の短辺側に隣接してパイプラック部の外に設けたことを特徴とする請求項1ないし5のいずれか一項に記載の液化ガス製造設備。 - 前記予冷熱交換部及び前記補助熱交換部のうちの少なくとも一方と前記主熱交換部とは、前記パイプラック部の短辺方向に沿って見たときに、少なくとも互いの一部が重なっていることを特徴とする請求項1ないし6のいずれか一項に記載の液化ガス製造設備。
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