KR20160087117A - Reliquefaction system - Google Patents

Reliquefaction system Download PDF

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Publication number
KR20160087117A
KR20160087117A KR1020150005480A KR20150005480A KR20160087117A KR 20160087117 A KR20160087117 A KR 20160087117A KR 1020150005480 A KR1020150005480 A KR 1020150005480A KR 20150005480 A KR20150005480 A KR 20150005480A KR 20160087117 A KR20160087117 A KR 20160087117A
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South Korea
Prior art keywords
gas
refrigerant
heat exchanger
cooling water
evaporation gas
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KR1020150005480A
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Korean (ko)
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최병윤
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삼성중공업 주식회사
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Priority to KR1020150005480A priority Critical patent/KR20160087117A/en
Publication of KR20160087117A publication Critical patent/KR20160087117A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • 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
    • F25J1/0002—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
    • F25J1/0025—Boil-off gases "BOG" from storages
    • 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
    • F25J1/003—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
    • F25J1/0032—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 the feed stream itself or separated fractions from it, i.e. "internal refrigeration"
    • F25J1/0045—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 the feed stream itself or separated fractions from it, i.e. "internal refrigeration" by vaporising a liquid return stream
    • 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
    • F25J1/003—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
    • 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
    • F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/008—Hydrocarbons
    • F25J1/0087—Propane; Propylene
    • 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
    • F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/008—Hydrocarbons
    • F25J1/009—Hydrocarbons with four or more carbon atoms
    • 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
    • F25J1/006—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the refrigerant fluid used
    • F25J1/008—Hydrocarbons
    • F25J1/0092—Mixtures of hydrocarbons comprising possibly also minor amounts of nitrogen
    • 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
    • F25J1/0203—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 single-component refrigerant [SCR] fluid in a closed vapor compression cycle
    • F25J1/0204—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 single-component refrigerant [SCR] fluid in a closed vapor compression cycle as a single flow SCR cycle
    • 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
    • F25J1/0211—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
    • F25J1/0212—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 single flow MCR cycle
    • 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
    • F25J1/0257—Construction and layout of liquefaction equipments, e.g. valves, machines
    • F25J1/0275—Construction and layout of liquefaction equipments, e.g. valves, machines adapted for special use of the liquefaction unit, e.g. portable or transportable devices
    • F25J1/0277—Offshore use, e.g. during shipping
    • 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
    • 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
    • F25J1/0297—Removal of the heat of compression, e.g. within an inter- or afterstage-cooler against an ambient heat sink using an externally chilled fluid, e.g. chilled water
    • 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
    • F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
    • F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
    • F25J3/0204—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream characterised by the feed stream
    • F25J3/0209—Natural gas or substitute natural gas
    • F25J3/0214—Liquefied natural gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0341—Heat exchange with the fluid by cooling using another fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0358—Heat exchange with the fluid by cooling by expansion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/032—Treating the boil-off by recovery
    • F17C2265/033—Treating the boil-off by recovery with cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/032—Treating the boil-off by recovery
    • F17C2265/038—Treating the boil-off by recovery with expanding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships
    • 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
    • F25J2215/00—Processes characterised by the type or other details of the product stream
    • F25J2215/62—Ethane or ethylene
    • 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
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/04—Compressor cooling arrangement, e.g. inter- or after-stage cooling or condensate removal
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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
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/08—Cold compressor, i.e. suction of the gas at cryogenic temperature and generally without afterstage-cooler
    • 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
    • F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
    • F25J2230/30—Compression of the feed stream
    • 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
    • F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
    • F25J2290/34—Details about subcooling of liquids

Abstract

A re-liquefying system is disclosed. According to an embodiment of the present invention, the re-liquefying system comprises: a storage tank storing liquefied gas and boil-off gas of the liquefied gas; a boil-off gas expansion device enabling the boil-off gas to be expanded by decompressing the boil-off gas; a fluid separator separating the boil-off gas passing through the boil-off gas expansion device into a liquid component and a gas component; and a liquefied gas heat exchanger unit provided between the boil-off gas expansion device and the fluid separator and enabling the liquid component supplied from the fluid separator and the boil-off gas passing through the boil-off gas expansion device to exchange heat. The purpose of the present invention is to provide the re-liquefying system, effectively re-liquefying the boil-off gas.

Description

재액화 시스템{RELIQUEFACTION SYSTEM}RELIQUACTION SYSTEM

본 발명은 재액화 시스템에 관한 것이다.The present invention relates to a re-liquefaction system.

셰일가스(Shale Gas) 및 액화천연가스(Liquefied Natural Gas, 이하 ‘LNG’라 함) 등으로부터 추출된 에탄(Ethane)은 석유화학제품의 원료로 사용되며, 최근에는 그 경제성이 부각되고 있다. 1기압에서 에탄은 대략 ―88.6℃, LNG의 주요 구성 성분인 메탄은 대략 ―161.5℃의 끊는점을 갖는다. 이러한 에탄과 LNG는 액화된 상태로 선박에 의해 수송될 수 있다.Ethane extracted from shale gas and Liquefied natural gas (LNG) is used as a raw material for petrochemical products, and recently its economical efficiency has been highlighted. At 1 atmosphere, ethane is approximately -88.6 ° C, and methane, the main constituent of LNG, has a breaking point of approximately -161.5 ° C. These ethane and LNG can be transported by the vessel in a liquefied state.

선박은 저장탱크로부터 공급받은 LNG 증발가스(BOG, Boil-Off Gas) 또는 LNG의 압력, 온도, 상태 등을 변환하여 엔진으로 공급하는 연료가스 공급시스템을 구비할 수 있다. 선박은 둘 이상의 이종연료를 연료로서 사용하는 DFDE(Dual Fuel Disel Electric) 엔진과 같은 저압가스 분사엔진과 ME-GI 엔진(Man B&W 사의 Gas Injection 엔진)과 같은 고압가스 분사엔진 등을 포함할 수 있다. The ship may be provided with a fuel gas supply system for converting the pressure, temperature, state, etc. of LNG vapor (BOG, Boil-Off Gas) or LNG supplied from the storage tank to the engine. The vessel may include a low pressure gas injection engine such as a Dual Fuel Disel Electric (DFDE) engine using two or more different fuels as fuel and a high pressure gas injection engine such as a ME-GI engine (Man B & W's Gas Injection engine) .

또, 선박에는 LNG 증발가스를 재액화하여 저장탱크에 재저장하는 재액화 설비가 마련될 수 있다. 예컨대, 한국공개특허 제10-2012-0103421호(2012. 09. 19. 공개)는 저장탱크에서 발생한 증발가스를 압축기에서 압축한 후 재액화장치에서 액화시키고, 이를 고압펌프로 공급하거나 저장탱크에 재저장하는 시스템을 제시한다.In addition, the ship may be provided with a re-liquefaction facility for re-liquefying the LNG vaporized gas and re-storing it in the storage tank. For example, Korean Patent Laid-Open No. 10-2012-0103421 (published on Mar. 19, 2012) discloses a method of compressing evaporated gas generated in a storage tank in a compressor, liquefying it in a re-liquefier, supplying it to a high- We propose a system to re-store.

이와 같이 종래에는 LNG 증발가스를 엔진으로 공급하거나 재액화하여 저장하는 등에 대한 시스템 개발은 활발하게 이루어진 반면, 액화에탄을 저장 및 수송하는 선박에서 액화에탄 증발가스를 효과적으로 재액화할 수 있는 시스템 개발은 미흡한 실정이다.As described above, in the past, system development has been vigorously carried out to supply LNG evaporation gas to the engine or to store liquefied liquefied gas. However, the development of a system capable of effectively liquefying liquefied ethane evaporation gas from a ship storing and transporting liquefied ethane It is insufficient.

한국공개특허 제10-2012-0103421호(2012. 09. 19. 공개)Korean Patent Laid-Open No. 10-2012-0103421 (published on September 19, 2012)

본 발명의 실시 예는 액화에탄을 운반하는 과정에서 발생하는 증발가스를 효과적으로 재액화시킬 수 있는 재액화 시스템을 제공하고자 한다.An embodiment of the present invention is to provide a re-liquefaction system capable of effectively re-liquefying evaporative gas generated in the course of carrying liquefied ethane.

본 발명의 일 측면에 따르면, 액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크; 상기 증발가스를 감압 팽창시키는 증발가스 팽창장치; 상기 증발가스 팽창장치를 통과한 증발가스를 액체성분과 기체성분으로 분리시키는 유체 세퍼레이터; 및 상기 증발가스 팽창장치와 상기 유체 세퍼레이터 사이에 마련되며, 상기 유체 세퍼레이터로부터 공급된 액체성분과 상기 증발가스 팽창장치를 통과한 증발가스 간 열교환을 수행하는 액화가스 열교환부;를 포함하는 재액화 시스템이 제공될 수 있다.According to an aspect of the present invention, there is provided a storage tank for storing a liquefied gas and an evaporated gas of the liquefied gas; An evaporation gas expansion device for decompressing and expanding the evaporation gas; A fluid separator for separating the evaporated gas that has passed through the evaporative gas expansion device into a liquid component and a gas component; And a liquefied gas heat exchanger provided between the evaporative gas expansion device and the fluid separator for performing heat exchange between the liquid component supplied from the fluid separator and the evaporated gas passing through the evaporative gas expansion device, Can be provided.

상기 저장탱크로부터 공급된 증발가스와 냉매 간 열교환을 수행하는 증발가스 열교환부를 더 포함할 수 있다.And an evaporation gas heat exchanger for exchanging heat between the refrigerant and the evaporation gas supplied from the storage tank.

상기 저장탱크의 증발가스를 상기 증발가스 열교환부, 상기 증발가스 팽창장치, 상기 액화가스 열교환부 및 상기 유체 세퍼레이터를 거쳐 상기 저장탱크로 재공급 하는 증발가스 공급라인과,An evaporation gas supply line for re-supplying the evaporation gas of the storage tank to the storage tank via the evaporation gas heat exchanger, the evaporation gas expansion device, the liquefied gas heat exchanger and the fluid separator,

상기 유체 세퍼레이터의 액체성분을 상기 액화가스 열교환부를 거쳐 상기 액화가스 열교환부 후단의 상기 증발가스 공급라인을 통해 상기 유체 세퍼레이터로 재공급되도록, 상기 유체 세퍼레이터로부터 상기 액화가스 열교환부를 거쳐 상기 액화가스 열교환부 후단의 상기 증발가스 공급라인과 연결된 회귀라인을 더 포함할 수 있다.And the liquid separator is supplied with the liquid separator through the liquefied gas heat exchanger and the liquid separator through the evaporation gas supply line at the rear end of the liquefied gas heat exchanger, And a return line connected to the evaporation gas supply line at the downstream end.

냉각수를 공급하는 냉각수 공급장치와, 상기 냉각수 공급장치로부터 공급된 냉각수와 냉매 간 열교환을 수행하는 냉각수 열교환부와, 상기 냉각수 열교환부를 거친 냉매를 감압 팽창시키는 냉매팽창장치를 더 포함하되, 상기 증발가스 열교환부는 제1열교환부와 제2열교환부를 포함하고, 상기 제1열교환부는 상기 저장탱크로부터 공급된 증발가스와 상기 제2열교환부를 거친 냉매 간 1차 열교환을 수행하고, 상기 제2열교환부는 상기 제1열교환부를 거친 증발가스와 상기 냉매팽창장치를 거친 냉매 간 2차 열교환을 수행할 수 있다.A cooling water heat exchanger for performing heat exchange between the cooling water supplied from the cooling water supply device and the refrigerant, and a refrigerant expansion device for decompressively expanding the refrigerant through the cooling water heat exchanging part, wherein the evaporation gas Wherein the heat exchanging unit includes a first heat exchanging unit and a second heat exchanging unit, wherein the first heat exchanging unit performs first heat exchange between the evaporation gas supplied from the storage tank and the refrigerant passing through the second heat exchanging unit, The second heat exchange between the evaporated gas passing through the first heat exchanger and the refrigerant passing through the refrigerant expansion device can be performed.

상기 저장탱크로부터 공급된 증발가스를 압축하는 압축기와, 상기 압축된 증발가스를 상기 냉각수 공급장치로부터 공급된 냉각수를 이용하여 냉각시키는 냉각기가 상기 제1열교환부의 전단에 교대로 복수 개 배치될 수 있다.A plurality of coolers for cooling the compressed evaporative gas supplied from the storage tank and cooling the compressed evaporative gas using the coolant supplied from the coolant supply device may be alternately disposed in front of the first heat exchanger .

상기 냉각수 열교환부, 상기 냉매팽창장치, 상기 제2열교환부, 및 상기 제1열교환부를 거쳐 냉매가 순환되도록 하는 냉매순환라인과, 상기 냉매순환라인에 설치되고, 상기 제1열교환부를 거친 냉매를 액체성분과 기체성분으로 분리시키는 냉매 세퍼레이터를 더 포함할 수 있다.A refrigerant circulation line for circulating the refrigerant through the cooling water heat exchanger, the refrigerant expansion device, the second heat exchanger, and the first heat exchanger; and a refrigerant circulation line installed in the refrigerant circulation line, And a refrigerant separator for separating the refrigerant into a gas component and a refrigerant separator.

상기 냉매 세퍼레이터로부터 공급된 상기 기체성분의 냉매를 압축하는 압축기와, 상기 압축된 냉매를 상기 냉각수 공급장치로부터 공급된 냉각수를 이용하여 냉각시키는 냉각기가 상기 냉각수 열교환부의 전단에 교대로 복수 개 배치될 수 있다.A compressor for compressing the refrigerant of the gas component supplied from the refrigerant separator and a plurality of coolers for cooling the compressed refrigerant by using the cooling water supplied from the cooling water supply device may be alternately arranged in front of the cooling water heat exchanger have.

본 발명의 실시 예에 따른 재액화 시스템은 액화에탄을 운반하는 과정에서 발생하는 증발가스를 효과적으로 재액화시킬 수 있다. The re-liquefaction system according to the embodiment of the present invention can effectively re-liquefy the evaporative gas generated in the course of carrying liquefied ethane.

본 발명의 효과들은 이상에서 언급한 효과들로 제한되지 않으며, 언급되지 않은 또 다른 효과들은 청구범위의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

도 1은 본 발명의 일 실시 예에 따른 재액화 시스템을 나타낸다.
도 2는 본 발명의 다른 실시 예에 따른 재액화 시스템을 나타낸다.Figure 1 shows a re-liquefaction system in accordance with an embodiment of the present invention.
Figure 2 shows a re-liquefaction system in accordance with another embodiment of the present invention.

이하에서는 본 발명의 실시 예들을 첨부 도면을 참조하여 상세히 설명한다. 이하에 소개되는 실시 예들은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 본 발명의 사상이 충분히 전달될 수 있도록 하기 위해 예로서 제공되는 것이다. 본 발명은 이하 설명되는 실시 예들에 한정되지 않고 다른 형태로 구체화될 수도 있다. 본 발명을 명확하게 설명하기 위하여 설명과 관계없는 부분은 도면에서 생략하였으며 도면들에 있어서, 구성요소의 폭, 길이, 두께 등은 편의를 위하여 과장되어 표현될 수 있다. 명세서 전체에 걸쳐서 동일한 참조번호들은 동일한 구성요소들을 나타낸다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art will be able to fully understand the spirit of the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted from the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

도 1을 참조하면, 본 발명의 일 실시 예에 따른 재액화 시스템(100)은 액화에탄을 운반하는 과정에서 발생하는 액화에탄 증발가스를 효과적으로 재액화시킬 수 있다. 재액화 시스템(100)은 액화에탄을 수송하는 선박에 설치될 수 있다. 또, 재액화 시스템(100)은 각종 액화연료 운반선, 액화연료 RV(Regasification Vessel), 컨테이너선, 일반상선, LNG FPSO(Floating, Production, Storage and Off-loading), LNG FSRU(Floating Storage and Regasification Unit) 등을 포함하는 선박에 적용될 수 있다. 이러한 재액화 시스템(100)은 저장탱크(10), 냉각수 공급장치(20), 냉각수 열교환부(30), 냉매팽창장치(40), 증발가스 열교환부(50), 증발가스 팽창장치(60), 액화가스 열교환부(70), 및 유체 세퍼레이터(80)를 포함한다.Referring to FIG. 1, the re-liquefaction system 100 according to an embodiment of the present invention can effectively re-liquefy the liquefied ethane gas generated in the process of transporting liquefied ethane. The re-liquefaction system 100 may be installed in a vessel that transports liquefied ethane. In addition, the re-liquefaction system 100 includes various liquefied fuel carriers, regasification vessels, container ships, general merchant ships, LNG FPSO (Floating, Production, Storage and Off-loading), LNG FSRU ) And the like. The re-liquefaction system 100 includes a storage tank 10, a cooling water supply device 20, a cooling water heat exchanger 30, a refrigerant expansion device 40, an evaporation gas heat exchange section 50, an evaporation gas expansion device 60, A liquefied gas heat exchanger 70, and a fluid separator 80. [

저장탱크(10)는 액화에탄을 저장하며, 증발가스 공급라인(L1)을 통해 증발가스 열교환부(50)에 포함된 제1열교환부(51) 쪽으로 액화에탄 증발가스를 공급한다. 저장탱크(10)는 예컨대 멤브레인형 탱크, SPB형 탱크를 포함할 수 있다. The storage tank 10 stores liquefied ethane and supplies liquefied ethane vapor to the first heat exchanger 51 included in the evaporative gas heat exchanger 50 through the evaporative gas supply line L1. The storage tank 10 may include, for example, a membrane type tank, an SPB type tank.

여기서, 제1열교환부(51) 전단의 증발가스 공급라인(L1)에는 액화가스 증발가스를 압축하는 제2압축부(12)가 마련되며, 제2열교환부(52) 후단의 증발가스 공급라인(L1)에는 증발가스 팽창장치(60), 액화가스 열교환부(70) 및 유체 세퍼레이터(80)가 마련될 수 있다. The evaporation gas supply line L1 at the upstream end of the first heat exchange unit 51 is provided with a second compression unit 12 for compressing the evaporation gas of the liquefied gas, (L1) may be provided with an evaporative gas expansion device (60), a liquefied gas heat exchange section (70), and a fluid separator (80).

냉각수 공급장치(20)는 냉각수를 공급한다. 냉각수는 글리콜 워터(Glycol Water), 해수 등을 포함할 수 있다. 냉각수 공급장치(20)는 냉각수 열교환부(30)를 거치도록 제1냉각수 공급라인(L2a)을 통해 냉각수를 공급할 수 있다. 또, 냉각수 공급장치(20)는 저장탱크(10)로부터 공급된 액화에탄 증발가스와의 열교환을 위해 제2냉각수 공급라인(L2b, 도 2 참조)을 통해 냉각수를 공급할 수 있다.The cooling water supply device 20 supplies cooling water. The cooling water may include glycol water, seawater, and the like. The cooling water supply device 20 can supply the cooling water through the first cooling water supply line L2a so as to pass through the cooling water heat exchange portion 30. [ The cooling water supply device 20 can supply the cooling water through the second cooling water supply line L2b (see FIG. 2) for heat exchange with the liquefied ethane evaporated gas supplied from the storage tank 10.

냉각수 열교환부(30)는 냉각수 공급장치(20)로부터 공급된 냉각수와 냉매 간 열교환을 수행한다. 냉각수와의 열교환을 통해 냉매는 온도가 더 낮아지게 된다. 냉매로는 질소, 프로판, 프로필렌, 암모니아, 부탄, 부타디엔 또는 이들의 혼합물이 사용될 수 있다.The cooling water heat exchanging part (30) performs heat exchange between the cooling water supplied from the cooling water supplying device (20) and the refrigerant. Through the heat exchange with the cooling water, the temperature of the refrigerant becomes lower. As the refrigerant, nitrogen, propane, propylene, ammonia, butane, butadiene or a mixture thereof may be used.

냉매는 냉매순환라인(L3)을 따라 냉각수 열교환부(30), 제1팽창장치(40), 제2열교환부(52), 및 제1열교환부(51)를 순차적으로 거치면서 순환된다. The refrigerant is circulated along the refrigerant circulation line L3 while sequentially passing through the cooling water heat exchanger 30, the first expansion device 40, the second heat exchanger 52, and the first heat exchanger 51.

냉매순환라인(L3)에는 펌프(P1)와, 제1열교환부(51)를 거친 냉매를 액체성분과 기체성분으로 분리시키는 냉매 세퍼레이터(22)와, 냉매 세퍼레이터(22)로부터 공급된 기체성분의 냉매를 압축하는 제1압축부(25)가 더 마련될 수 있다.The refrigerant circulation line L3 is provided with a pump P1 and a refrigerant separator 22 for separating the refrigerant passing through the first heat exchanging portion 51 into a liquid component and a gas component and a refrigerant separator 22 for separating the gas component supplied from the refrigerant separator 22 The first compression section 25 for compressing the refrigerant may be further provided.

냉매팽창장치(40)는 냉각수 열교환부(30)를 거친 냉매를 감압 팽창시킨다. 냉매팽창장치(40)는 예컨대 줄-톰슨(Joule Thomson) 밸브를 포함할 수 있다.The refrigerant expansion device (40) decompressively expands the refrigerant passing through the cooling water heat exchanging part (30). The refrigerant expansion device 40 may comprise, for example, a Joule Thomson valve.

증발가스 열교환부(50)는 냉매팽창장치(40)를 거친 냉매와 저장탱크(10)로부터 공급된 액화가스 증발가스 간 열교환을 수행한다. 증발가스 열교환부(50)는 저장탱크(10)로부터 공급된 액화가스 증발가스와 제2열교환부(52)를 거친 냉매 간 1차 열교환을 수행하는 제1열교환부(51)와, 제1열교환부(51)를 거친 액화가스 증발가스와 냉매팽창장치(40)를 거친 냉매 간 2차 열교환을 수행하는 제2열교환부(52)를 포함할 수 있다. 제1열교환부(51)와 제2열교환부(52)를 통해 액화가스 증발가스와 냉매 간 열교환이 중복해서 수행됨으로써, 보다 효과적으로 액화가스 증발가스의 재액화가 이루어질 수 있다. The evaporation gas heat exchanging unit 50 performs heat exchange between the refrigerant passing through the refrigerant expansion device 40 and the evaporation gas of the liquefied gas supplied from the storage tank 10. The evaporation gas heat exchanging part 50 includes a first heat exchanging part 51 for performing first heat exchange between the liquefied gas evaporated gas supplied from the storage tank 10 and the refrigerant passing through the second heat exchanging part 52, And a second heat exchange unit 52 for performing secondary heat exchange between the liquefied gas evaporated gas passing through the unit 51 and the refrigerant passing through the refrigerant expansion device 40. The heat exchange between the liquefied gas evaporating gas and the refrigerant is performed through the first heat exchanging unit 51 and the second heat exchanging unit 52 in a repetitive manner, so that the re-liquefaction of the liquefied gas evaporating gas can be performed more effectively.

즉, 증발가스 열교환부(50)를 복수 개의 열교환부(51,52)로 구성하여, 증발가스 열교환부(50)의 성능상의 한계를 극복하고, 액화가스 증발가스의 재액화율을 높일 수 있다. 본 발명의 실시 예에서는 증발가스 열교환부(50)가 2개의 열교환부(51,52)로 구성된 것을 예로 들어 설명하였지만, 3개 이상으로 구성될 수도 있다.That is, the evaporation gas heat exchanging unit 50 can be constituted by a plurality of heat exchanging units 51 and 52, thereby overcoming the performance limitations of the evaporating gas heat exchanging unit 50, and raising the refilling rate of the liquefied gas evaporating gas. In the embodiment of the present invention, the evaporation gas heat exchanging part 50 is composed of two heat exchanging parts 51 and 52, but it may be composed of three or more.

증발가스 팽창장치(60)는 제2열교환부(52)를 거친 액화가스 증발가스를 감압 팽창시킨다. 증발가스 팽창장치(60)는 예컨대 줄-톰슨(Joule Thomson) 밸브를 포함할 수 있다.The evaporation gas expansion device (60) decompressively expels the liquefied gas evaporated gas through the second heat exchanging part (52). The evaporative gas expansion device 60 may comprise, for example, a Joule Thomson valve.

액화가스 열교환부(70)는 증발가스 팽창장치(60)와 유체 세퍼레이터(80) 사이에 마련되며, 회귀라인(L4)을 통해 유체 세퍼레이터(80)로부터 공급된 액체성분과 증발가스 팽창장치(60)를 거친 액화가스 증발가스 간 열교환을 수행한다. 유체 세퍼레이터(80)로부터 공급된 액체성분을 이용하여 증발가스 팽창장치(60)를 거친 액화가스 증발가스에 대한 재액화를 수행함으로써, 재액화 효율성을 더 높일 수 있다.The liquefied gas heat exchanger 70 is provided between the evaporator gas expansion device 60 and the fluid separator 80 and is provided between the liquid component supplied from the fluid separator 80 through the return line L4 and the liquid component supplied from the evaporative gas expansion device 60 ) To perform the heat exchange between the liquefied gas evaporated gas. The liquefaction efficiency can be further improved by performing re-liquefaction of the liquefied gas evaporated gas through the evaporated gas expansion device 60 using the liquid component supplied from the fluid separator 80. [

회귀라인(L4)은 유체 세퍼레이터(80)로부터 공급된 액체성분이 액화가스 열교환부(70)를 거쳐 액화가스 열교환부(70) 후단의 증발가스 공급라인(L1)을 통해 유체 세퍼레이터(80)에 저장되도록, 유체 세퍼레이터(80)로부터 액화가스 열교환부(70)를 거쳐 액화가스 열교환부(70) 후단의 증발가스 공급라인(L1)과 연결된다. 이하, 도 2를 통해 본 발명의 다른 실시 예에 따른 재액화 시스템(100)에 대해서 설명하되, 도 1과 중복된 내용은 생략한다.The return line L4 is a line for supplying the liquid component supplied from the fluid separator 80 to the fluid separator 80 through the evaporation gas supply line L1 at the rear end of the liquefied gas heat exchanger 70 via the liquefied gas heat exchanger 70 The liquid separator 80 is connected to the evaporation gas supply line L1 at the rear end of the liquefied gas heat exchanging unit 70 via the liquefied gas heat exchanging unit 70 so as to be stored. Hereinafter, the re-liquefaction system 100 according to another embodiment of the present invention will be described with reference to FIG. 2, but the contents overlapping with FIG. 1 will be omitted.

유체 세퍼레이터(80)는 액화가스 열교환부(70)에 의해 열교환이 수행된 후 합류된 액체성분과 액화가스 증발가스를 액체성분과 기체성분으로 분리시킨다. 유체 세퍼레이터(80)에 저장된 액체성분 중 일부는 회귀라인(L4)을 통해 액화가스 열교환부(70)로 보내지고, 나머지는 증발가스 공급라인(L1)을 통해 저장탱크(10)로 보내진다. 이때, 미리 설정된 값에 따라 액화가스 열교환부(70) 및 저장탱크(10)로 보내지는 액체성분의 양이 정해질 수 있다.The fluid separator 80 separates the merged liquid component and the liquefied gas evaporated gas into a liquid component and a gaseous component after the heat exchange is performed by the liquefied gas heat exchange section 70. Some of the liquid components stored in the fluid separator 80 are sent to the liquefied gas heat exchanger 70 through the return line L4 and the remaining liquid is sent to the storage tank 10 through the evaporation gas supply line L1. At this time, the amount of the liquid component to be sent to the liquefied gas heat exchanger 70 and the storage tank 10 can be determined according to a preset value.

이하, 도 2를 통해 본 발명의 다른 실시 예에 따른 재액화 시스템(100)에 대해서 설명하되, 도 1과 중복된 내용은 생략한다.Hereinafter, the re-liquefaction system 100 according to another embodiment of the present invention will be described with reference to FIG. 2, but the contents overlapping with FIG. 1 will be omitted.

도 2를 참조하면, 본 발명의 다른 실시 예에 따른 재액화 시스템(100)은 세퍼레이터(22)로부터 공급된 기체성분의 냉매를 압축하는 압축기(25-1, 25-2, … , 25-n)와, 압축된 냉매를 냉각수 공급장치(20)로부터 제1냉각수 공급라인(L2a)을 통해 공급된 냉각수를 이용하여 냉각시키는 냉각기(31-1, 31-2, … , 31-n)가 냉각수 열교환부(30)의 전단에 교대로 복수 개 배치된 구성을 포함할 수 있다. 2, the re-liquefaction system 100 according to another embodiment of the present invention includes compressors 25-1, 25-2, ..., 25-n for compressing refrigerant of gas components supplied from the separator 22, And coolers 31-1, 31-2, ..., and 31-n for cooling the compressed refrigerant by using the cooling water supplied from the cooling water supply device 20 through the first cooling water supply line L2a, A plurality of heat exchanging units 30 may be alternately arranged in front of the heat exchanging unit 30.

냉매의 온도는 복수의 압축기(25-1, 25-2, … , 25-n)와 냉각기(31-1, 31-2, … , 31-n)를 거치면서 점차적으로 낮아져 설정 온도에 도달하게 된다. 이를 통해 냉매의 사용량을 줄이면서도 효율성은 높아질 수 있다.The temperature of the refrigerant is gradually lowered through the plurality of compressors 25-1, 25-2, ..., and 25-n and the coolers 31-1, 31-2, ..., and 31-n, do. This can increase the efficiency while reducing the amount of refrigerant used.

또, 본 발명의 다른 실시 예에 따른 재액화 시스템(100)은 저장탱크(10)로부터 공급된 액화가스 증발가스를 압축하는 압축기(12-1, 12-2, … , 12-n)와, 압축된 액화가스 증발가스를 냉각수 공급장치(20)로부터 제2냉각수 공급라인(L2b)를 통해 공급된 냉각수를 이용하여 냉각시키는 냉각기(32-1, 32-2, … , 32-n)가 제1열교환부(51)의 전단에 교대로 복수 개 배치된 구성을 포함할 수 있다. The re-liquefaction system 100 according to another embodiment of the present invention includes compressors 12-1, 12-2, ..., 12-n for compressing the liquefied gas evaporated gas supplied from the storage tank 10, The coolers 32-1, 32-2, ..., and 32-n that cool the compressed liquefied gas evaporated gas from the coolant supply device 20 by using the coolant water supplied through the second coolant supply line L2b, A plurality of heat exchanging units 51 may be alternately arranged in front of the heat exchanging unit 51.

액화가스 증발가스의 온도는 복수의 압축기(12-1, 12-2, … , 12-n)와 냉각기(32-1, 32-2, … , 32-n)를 거치면서 점차적으로 낮아져 설정 온도에 도달하게 된다. The temperature of the liquefied gas evaporation gas gradually decreases through the plurality of compressors 12-1, 12-2, ..., 12-n and the coolers 32-1, 32-2, ..., 32- .

상술한 실시 예에서는 액화에탄을 예로 들어 설명하였으나, 이에 한정되는 것은 아니다. 예컨대, 액화천연가스(LNG, Liquefied Natural Gas), 액화석유가스(LPG, Liquefied Petroleum Gas), 액화프로판, 액화부탄 등과 같이 상온에서 기화되는 액화가스가 액화에탄 대신 사용될 수도 있다.Although liquefied ethane has been described as an example in the above-described embodiments, the present invention is not limited thereto. For example, a liquefied gas which is vaporized at room temperature, such as liquefied natural gas (LNG), liquefied petroleum gas (LPG), liquefied propane, liquefied butane, etc., may be used instead of liquefied ethane.

이상에서는 특정의 실시 예에 대하여 도시하고 설명하였다. 그러나, 본 발명은 상기한 실시 예에만 한정되지 않으며, 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 이하의 청구범위에 기재된 발명의 기술적 사상의 요지를 벗어남이 없이 얼마든지 다양하게 변경 실시할 수 있을 것이다.The foregoing has shown and described specific embodiments. However, it is to be understood that the present invention is not limited to the above-described embodiment, and various changes and modifications may be made without departing from the scope of the technical idea of the present invention described in the following claims It will be possible.

10: 저장탱크 20: 냉각수 공급장치
30: 냉각수 열교환부 40, 60: 팽창장치
22, 80: 세퍼레이터 12, 25: 압축부
50: 증발가스 열교환부 51: 제1열교환부
52: 제2열교환부 70: 액화가스 열교환부
L1: 증발가스 공급라인 L2a, L2b: 냉각수 공급라인
L3: 냉매순환라인 L4: 회귀라인10: Storage tank 20: Cooling water supply device
30: cooling water heat exchanger 40, 60: expansion device
22, 80: separator 12, 25: compression section
50: evaporation gas heat exchanger 51: first heat exchanger
52: second heat exchanger 70: liquefied gas heat exchanger
L1: evaporation gas supply lines L2a, L2b: cooling water supply line
L3: refrigerant circulation line L4: regression line

Claims (7)

액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크;
상기 증발가스를 감압 팽창시키는 증발가스 팽창장치;
상기 증발가스 팽창장치를 통과한 증발가스를 액체성분과 기체성분으로 분리시키는 유체 세퍼레이터; 및
상기 증발가스 팽창장치와 상기 유체 세퍼레이터 사이에 마련되며, 상기 유체 세퍼레이터로부터 공급된 액체성분과 상기 증발가스 팽창장치를 통과한 증발가스 간 열교환을 수행하는 액화가스 열교환부;를 포함하는 재액화 시스템.A storage tank for storing a liquefied gas and an evaporation gas of the liquefied gas;
An evaporation gas expansion device for decompressing and expanding the evaporation gas;
A fluid separator for separating the evaporated gas that has passed through the evaporative gas expansion device into a liquid component and a gas component; And
And a liquefied gas heat exchanger provided between the evaporation gas expansion device and the fluid separator for performing heat exchange between the liquid component supplied from the fluid separator and the evaporation gas passing through the evaporation gas expansion device. 제1항에 있어서,
상기 저장탱크로부터 공급된 증발가스와 냉매 간 열교환을 수행하는 증발가스 열교환부를 더 포함하는 재액화 시스템.The method according to claim 1,
And an evaporation gas heat exchanger for exchanging heat between the refrigerant and the evaporation gas supplied from the storage tank. 제2항에 있어서,
상기 저장탱크의 증발가스를 상기 증발가스 열교환부, 상기 증발가스 팽창장치, 상기 액화가스 열교환부 및 상기 유체 세퍼레이터를 거쳐 상기 저장탱크로 재공급 하는 증발가스 공급라인과,
상기 유체 세퍼레이터의 액체성분을 상기 액화가스 열교환부를 거쳐 상기 액화가스 열교환부 후단의 상기 증발가스 공급라인을 통해 상기 유체 세퍼레이터로 재공급되도록, 상기 유체 세퍼레이터로부터 상기 액화가스 열교환부를 거쳐 상기 액화가스 열교환부 후단의 상기 증발가스 공급라인과 연결된 회귀라인을 더 포함하는 재액화 시스템.3. The method of claim 2,
An evaporation gas supply line for re-supplying the evaporation gas of the storage tank to the storage tank via the evaporation gas heat exchanger, the evaporation gas expansion device, the liquefied gas heat exchanger and the fluid separator,
And the liquid separator is supplied with the liquid separator through the liquefied gas heat exchanger and the liquid separator through the evaporation gas supply line at the rear end of the liquefied gas heat exchanger, Further comprising a return line connected to said evaporation gas supply line at a subsequent stage. 제2항에 있어서,
냉각수를 공급하는 냉각수 공급장치와,
상기 냉각수 공급장치로부터 공급된 냉각수와 냉매 간 열교환을 수행하는 냉각수 열교환부와,
상기 냉각수 열교환부를 거친 냉매를 감압 팽창시키는 냉매팽창장치를 더 포함하되,
상기 증발가스 열교환부는 제1열교환부와 제2열교환부를 포함하고,
상기 제1열교환부는 상기 저장탱크로부터 공급된 증발가스와 상기 제2열교환부를 거친 냉매 간 1차 열교환을 수행하고,
상기 제2열교환부는 상기 제1열교환부를 거친 증발가스와 상기 냉매팽창장치를 거친 냉매 간 2차 열교환을 수행하는 재액화 시스템.3. The method of claim 2,
A cooling water supply device for supplying cooling water,
A cooling water heat exchanger for performing heat exchange between the cooling water supplied from the cooling water supply device and the refrigerant,
Further comprising a refrigerant expansion device for decompressing and expanding the refrigerant that has passed through the cooling water heat exchanging part,
Wherein the evaporation gas heat exchanger includes a first heat exchanger and a second heat exchanger,
Wherein the first heat exchanger performs primary heat exchange between the evaporated gas supplied from the storage tank and the refrigerant passing through the second heat exchanger,
And the second heat exchanger performs second heat exchange between the evaporated gas passing through the first heat exchanger and the refrigerant passing through the refrigerant expan- sion device. 제4항에 있어서,
상기 저장탱크로부터 공급된 증발가스를 압축하는 압축기와,
상기 압축된 증발가스를 상기 냉각수 공급장치로부터 공급된 냉각수를 이용하여 냉각시키는 냉각기가 상기 제1열교환부의 전단에 교대로 복수 개 배치된 재액화 시스템.5. The method of claim 4,
A compressor for compressing the evaporation gas supplied from the storage tank,
And a plurality of coolers for cooling the compressed evaporated gas using the cooling water supplied from the cooling water supply device are alternately arranged in front of the first heat exchange unit. 제4항에 있어서,
상기 냉각수 열교환부, 상기 냉매팽창장치, 상기 제2열교환부, 및 상기 제1열교환부를 거쳐 냉매가 순환되도록 하는 냉매순환라인과,
상기 냉매순환라인에 설치되고, 상기 제1열교환부를 거친 냉매를 액체성분과 기체성분으로 분리시키는 냉매 세퍼레이터를 더 포함하는 재액화 시스템.5. The method of claim 4,
A refrigerant circulation line for circulating the refrigerant through the cooling water heat exchanger, the refrigerant expansion device, the second heat exchanger, and the first heat exchanger,
And a refrigerant separator installed in the refrigerant circulation line and separating the refrigerant passed through the first heat exchanging unit into a liquid component and a gas component. 제6항에 있어서,
상기 냉매 세퍼레이터로부터 공급된 상기 기체성분의 냉매를 압축하는 압축기와,
상기 압축된 냉매를 상기 냉각수 공급장치로부터 공급된 냉각수를 이용하여 냉각시키는 냉각기가 상기 냉각수 열교환부의 전단에 교대로 복수 개 배치된 재액화 시스템.The method according to claim 6,
A compressor for compressing the refrigerant of the gas component supplied from the refrigerant separator;
And a plurality of coolers for cooling the compressed refrigerant by using the cooling water supplied from the cooling water supply device are alternately arranged in front of the cooling water heat exchanging part.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190013485A (en) * 2017-07-31 2019-02-11 대우조선해양 주식회사 BOG Reliquefaction System for Vessels and Method of Discharging Lubrication Oil in the Same
KR20210122922A (en) 2020-03-31 2021-10-13 주식회사 패리티 Hydrogen reliquefaction system
WO2022019914A1 (en) * 2020-07-23 2022-01-27 Bechtel Energy Technologies & Solutions, Inc. Systems and methods for utilizing boil-off gas for supplemental cooling in natural gas liquefaction plants
KR102487017B1 (en) * 2022-05-03 2023-01-11 에너진(주) Gasification device for liquefied natural gas
WO2023026052A3 (en) * 2021-08-27 2023-04-20 Highview Enterprises Limited High-grade heat-of-compression storage system, and methods of use

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120103421A (en) 2011-03-11 2012-09-19 대우조선해양 주식회사 System for supplying fuel for a marine structure having a reliquefaction apparatus and a high pressure natural gas injection engine

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120103421A (en) 2011-03-11 2012-09-19 대우조선해양 주식회사 System for supplying fuel for a marine structure having a reliquefaction apparatus and a high pressure natural gas injection engine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190013485A (en) * 2017-07-31 2019-02-11 대우조선해양 주식회사 BOG Reliquefaction System for Vessels and Method of Discharging Lubrication Oil in the Same
KR20210122922A (en) 2020-03-31 2021-10-13 주식회사 패리티 Hydrogen reliquefaction system
WO2022019914A1 (en) * 2020-07-23 2022-01-27 Bechtel Energy Technologies & Solutions, Inc. Systems and methods for utilizing boil-off gas for supplemental cooling in natural gas liquefaction plants
WO2023026052A3 (en) * 2021-08-27 2023-04-20 Highview Enterprises Limited High-grade heat-of-compression storage system, and methods of use
KR102487017B1 (en) * 2022-05-03 2023-01-11 에너진(주) Gasification device for liquefied natural gas

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