KR20230042794A - Carbon dioxide liquefaction apparatus - Google Patents

Carbon dioxide liquefaction apparatus Download PDF

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KR20230042794A
KR20230042794A KR1020210125471A KR20210125471A KR20230042794A KR 20230042794 A KR20230042794 A KR 20230042794A KR 1020210125471 A KR1020210125471 A KR 1020210125471A KR 20210125471 A KR20210125471 A KR 20210125471A KR 20230042794 A KR20230042794 A KR 20230042794A
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South Korea
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carbon dioxide
supply line
heat exchanger
refrigerant
natural gas
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KR1020210125471A
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Korean (ko)
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이상혁
김선정
김재관
김정남
박어진
이승재
최정인
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삼성중공업 주식회사
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Publication of KR20230042794A publication Critical patent/KR20230042794A/en

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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
    • F25J1/0002—Processes or apparatus for liquefying or solidifying gases or gaseous mixtures characterised by the fluid to be liquefied
    • F25J1/0027—Oxides of carbon, e.g. CO2
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • B63B17/0027—Tanks for fuel or the like ; Accessories therefor, e.g. tank filler caps
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63J—AUXILIARIES ON VESSELS
    • B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
    • B63J2/12—Heating; Cooling
    • 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"
    • F25J1/004—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 flash gas recovery
    • 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
    • F25J1/02—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
    • F25J1/0221—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 the cold stored in an external cryogenic component in an open refrigeration loop
    • F25J1/0222—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 the cold stored in an external cryogenic component in an open refrigeration loop in combination with an intermediate heat exchange fluid between the cryogenic component and the fluid to be liquefied
    • 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
    • F25J1/0221—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 the cold stored in an external cryogenic component in an open refrigeration loop
    • F25J1/0224—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 the cold stored in an external cryogenic component in an open refrigeration loop in combination with an internal quasi-closed refrigeration loop
    • 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
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/04—Mixing or blending of fluids with 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
    • F25J2210/00—Processes characterised by the type or other details of the feed stream
    • F25J2210/62—Liquefied natural gas [LNG]; Natural gas liquids [NGL]; Liquefied petroleum gas [LPG]
    • 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
    • F25J2220/80—Separating impurities from carbon dioxide, e.g. H2O or water-soluble contaminants
    • F25J2220/82—Separating low boiling, i.e. more volatile components, e.g. He, H2, CO, Air gases, CH4
    • 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
    • F25J2230/30—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
    • F25J2245/00—Processes or apparatus involving steps for recycling of process streams
    • F25J2245/02—Recycle of a stream in general, e.g. a by-pass 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
    • F25J2270/00—Refrigeration techniques used
    • F25J2270/12—External refrigeration with liquid vaporising loop
    • 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
    • F25J2290/70—Processing device is mobile or transportable, e.g. by hand, car, ship, rocket engine etc.
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

According to one embodiment of the present invention, provided is a carbon dioxide liquefaction device. According to one embodiment of the present invention, the carbon dioxide liquefaction device comprises: a carbon dioxide supply line receiving carbon dioxide generated from a ship; a heat exchanger installed on the carbon dioxide supply line and cooling carbon dioxide by heat exchange with a refrigerant; an expansion valve installed on the carbon dioxide supply line at a rear end of the heat exchanger and depressurizing carbon dioxide; a gas-liquid separator installed on the carbon dioxide supply line at a rear end of the expansion valve and separating liquid carbon dioxide and gaseous carbon dioxide; a fuel supply line pressurizing and heating liquefied natural gas supplied from a fuel tank and supplying the same to a combustion engine; a heating unit installed on the fuel supply line and vaporizing the liquefied natural gas into natural gas by exchanging heat with the refrigerant; and a refrigerant circulation line in which the refrigerant circulates in a closed-loop independent cycle and passes through the heat exchanger and heating unit. According to the present invention, as the heat exchange performance of the heating unit is maintained stably, fuel can be supplied after being sufficiently heated to the temperature required by the combustion engine, and combustion efficiency can be improved.

Description

이산화탄소 액화장치{Carbon dioxide liquefaction apparatus}Carbon dioxide liquefaction apparatus {Carbon dioxide liquefaction apparatus}

본 발명은 이산화탄소 액화장치에 관한 것으로서, 더욱 상세하게는 액화천연가스의 냉열을 활용하여 선박에서 발생된 이산화탄소를 액화하고, 액화 과정에서 드라이아이스가 생성되는 것을 방지하여 액화천연가스를 기화시키는 가열유닛의 열교환 성능을 안정적으로 유지시킬 수 있는 이산화탄소 액화장치에 관한 것이다.The present invention relates to a carbon dioxide liquefaction device, and more particularly, to a heating unit that liquefies carbon dioxide generated in a ship by utilizing cold heat of liquefied natural gas and vaporizes the liquefied natural gas by preventing dry ice from being generated during the liquefaction process. It relates to a carbon dioxide liquefaction device capable of stably maintaining the heat exchange performance of

일반적으로, 선박에 설치되는 각종 엔진은 연료를 연소하여 동력을 생성하며, 연료의 연소과정에서 발생되는 배기가스는 질소산화물, 황산화물, 이산화탄소, 미연소 메탄 등을 포함하고 있다. 대기오염이 증가함에 따라 배기가스에 포함된 각종 유해물질에 대한 규제가 엄격해지고 있는 실정이며, 질소산화물과 황산화물뿐만 아니라 이산화탄소도 유엔 산하기관인 국제해사기구(IMO; International Maritime Organization)로부터 배출규제를 받고 있다. 실제, 국제해사기구는 2008년 기준 이산화탄소의 배출량을 2030년까지 40% 줄이고 2050년까지 70% 줄이는 것을 추진 중에 있다.In general, various engines installed in ships generate power by burning fuel, and exhaust gas generated in the process of burning fuel contains nitrogen oxides, sulfur oxides, carbon dioxide, unburned methane, and the like. As air pollution increases, regulations on various harmful substances included in exhaust gas are becoming stricter. Not only nitrogen oxides and sulfur oxides, but also carbon dioxide are subject to emission regulations from the International Maritime Organization (IMO), an organization affiliated with the United Nations. are receiving In fact, the International Maritime Organization is promoting a reduction of carbon dioxide emissions by 40% by 2030 and 70% by 2050 based on 2008.

배기가스에 포함된 이산화탄소를 포집하는 방법으로는 크게, 흡수제 및 흡착제를 이용한 습식 및 건식 포집 방법과, 멤브레인을 이용한 분리막 포집 방법이 있으며, 통상, 습식 포집 방법이 사용되고 있다. 습식 포집 방법은, 배기가스를 흡수제가 존재하는 흡수탑에 통과시켜 배기가스에 포함된 이산화탄소를 흡수제에 흡수시키고, 이산화탄소를 흡수한 흡수제를 재생탑에 통과시켜 이산화탄소와 흡수제를 분리하는 방식이다. 분리된 이산화탄소는 액화된 후 선박에 저장될 수 있다. 종래의 이산화탄소 액화 기술은 화물창에서 발생하는 이산화탄소 증발가스를 선박 연료로 사용되는 액화천연가스와 직접 열교환하여 액화시켰다. 이러한 액화방식은 열교환 효율이 높을 순 있으나, 이산화탄소의 삼중점(triple point)이 5.1bar, -56℃인 것을 고려할 때, -160℃ 이하의 액화천연가스와 이산화탄소를 직접 열교환하면, 액화천연가스를 기화시키는 가열유닛의 유로 표면에 드라이아이스가 생성되어 열교환성능을 안정적으로 유지하는 것이 어려운 문제가 있다. 또한, 엔진에서 요구되는 온도로 연료가 충분히 가열되지 못한 상태에서 엔진에 공급되어 연소 효율이 저하되는 문제도 있다.Methods for capturing carbon dioxide contained in exhaust gas include wet and dry collection methods using absorbents and adsorbents, and separation membrane collection methods using membranes. In general, wet collection methods are used. In the wet capture method, exhaust gas is passed through an absorption tower in which an absorbent is present, carbon dioxide contained in the exhaust gas is absorbed into the absorbent, and carbon dioxide and the absorbent are separated by passing the absorbent that has absorbed the carbon dioxide through a regeneration tower. The separated carbon dioxide can be liquefied and stored on board the vessel. In the conventional carbon dioxide liquefaction technology, carbon dioxide evaporation gas generated in a cargo hold is liquefied by direct heat exchange with liquefied natural gas used as a ship fuel. This liquefaction method may have high heat exchange efficiency, but considering that the triple point of carbon dioxide is 5.1 bar and -56 ° C, direct heat exchange between liquefied natural gas and carbon dioxide at -160 ° C or lower vaporizes liquefied natural gas. There is a problem in that it is difficult to stably maintain the heat exchange performance because dry ice is generated on the surface of the passage of the heating unit. In addition, there is a problem in that combustion efficiency is lowered because the fuel is supplied to the engine in a state in which the fuel is not sufficiently heated to a temperature required by the engine.

이에, 액화천연가스의 냉열을 활용하면서 이산화탄소의 액화 과정에서 발생하는 드라이아이스 생성 문제를 해결할 수 있는 안정적인 이산화탄소 액화장치가 필요하게 되었다.Accordingly, there is a need for a stable carbon dioxide liquefaction device capable of solving the problem of generating dry ice generated in the process of liquefying carbon dioxide while utilizing the cold heat of liquefied natural gas.

대한민국 등록특허 제10-1378995호 (2014. 03. 21.)Republic of Korea Patent No. 10-1378995 (2014. 03. 21.)

본 발명이 이루고자 하는 기술적 과제는, 액화천연가스의 냉열을 활용하여 선박에서 발생된 이산화탄소를 액화하고, 액화 과정에서 드라이아이스가 생성되는 것을 방지하여 액화천연가스를 기화시키는 가열유닛의 열교환 성능을 안정적으로 유지시킬 수 있는 이산화탄소 액화장치를 제공하는 것이다.The technical problem to be achieved by the present invention is to stabilize the heat exchange performance of a heating unit that vaporizes the liquefied natural gas by liquefying the carbon dioxide generated in the ship by utilizing the cold heat of the liquefied natural gas and preventing dry ice from being generated during the liquefaction process. It is to provide a carbon dioxide liquefaction device that can be maintained as

본 발명의 기술적 과제들은 이상에서 언급한 기술적 과제로 제한되지 않으며, 언급되지 않은 또 다른 기술적 과제들은 아래의 기재로부터 당업자에게 명확하게 이해될 수 있을 것이다.The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

상기 기술적 과제를 달성하기 위한 본 발명의 실시예에 따른 이산화탄소 액화장치는, 선박에서 발생된 이산화탄소를 공급받는 이산화탄소공급라인과, 상기 이산화탄소공급라인 상에 설치되며 이산화탄소를 냉매와 열교환하여 냉각시키는 열교환기와, 상기 열교환기 후단의 상기 이산화탄소공급라인 상에 설치되어 이산화탄소를 감압하는 팽창밸브와, 상기 팽창밸브 후단의 상기 이산화탄소공급라인 상에 설치되어 액상의 이산화탄소와 기상의 이산화탄소를 분리하는 기액분리기와, 연료탱크로부터 공급받은 액화천연가스를 가압하고 가열하여 연소기관으로 공급하는 연료공급라인과, 상기 연료공급라인 상에 설치되며, 상기 액화천연가스를 상기 냉매와 열교환하여 천연가스로 기화시키는 가열유닛, 및 폐루프 독립 사이클을 구성하여 상기 냉매가 순환하며, 상기 열교환기와 상기 가열유닛을 경유하는 냉매순환라인을 포함한다.Carbon dioxide liquefaction apparatus according to an embodiment of the present invention for achieving the above technical problem, a carbon dioxide supply line for receiving carbon dioxide generated in a ship, a heat exchanger installed on the carbon dioxide supply line and cooling carbon dioxide by heat exchange with a refrigerant An expansion valve installed on the carbon dioxide supply line at the rear end of the heat exchanger to reduce carbon dioxide, a gas-liquid separator installed on the carbon dioxide supply line at the rear end of the expansion valve to separate liquid carbon dioxide and gaseous carbon dioxide, and fuel A fuel supply line for pressurizing and heating the liquefied natural gas supplied from the tank and supplying it to a combustion engine, a heating unit installed on the fuel supply line and vaporizing the liquefied natural gas into natural gas by exchanging heat with the refrigerant, and The refrigerant circulates in a closed loop independent cycle and includes a refrigerant circulation line passing through the heat exchanger and the heating unit.

상기 이산화탄소 액화장치는, 상기 열교환기 전단의 상기 이산화탄소공급라인 상에 설치되어 이산화탄소를 가압하는 압축기와, 상기 압축기 후단에 설치되어 가압된 이산화탄소를 냉각하는 냉각기를 포함하는 적어도 하나의 압축유닛을 더 포함할 수 있다.The carbon dioxide liquefaction device further includes at least one compression unit including a compressor installed on the carbon dioxide supply line at a front end of the heat exchanger to pressurize carbon dioxide, and a cooler installed at a rear end of the compressor to cool the pressurized carbon dioxide. can do.

상기 이산화탄소 액화장치는, 상기 가열유닛 전단의 상기 냉매순환라인 상에 설치되어 상기 가열유닛으로 공급되는 상기 냉매를 가열하는 히터를 더 포함할 수 있다.The carbon dioxide liquefier may further include a heater installed on the refrigerant circulation line in front of the heating unit to heat the refrigerant supplied to the heating unit.

상기 이산화탄소 액화장치는, 상기 기액분리기에서 분리된 상기 액상의 이산화탄소를 저장탱크로 공급하는 제1 배출관과, 상기 기액분리기에서 분리된 상기 기상의 이산화탄소를 배출하는 제2 배출관을 더 포함할 수 있다.The carbon dioxide liquefaction device may further include a first discharge pipe for supplying the liquid carbon dioxide separated from the gas-liquid separator to a storage tank, and a second discharge pipe for discharging the gaseous carbon dioxide separated from the gas-liquid separator.

상기 제2 배출관은 상기 압축유닛 전단의 상기 이산화탄소공급라인 상에 연결되고, 상기 이산화탄소 액화장치는, 상기 제2 배출관 상에 설치되어 상기 기상의 이산화탄소를 가압하고 냉각하는 보조압축유닛을 더 포함할 수 있다.The second discharge pipe may be connected to the carbon dioxide supply line at the front end of the compression unit, and the carbon dioxide liquefier may further include an auxiliary compression unit installed on the second discharge pipe to pressurize and cool the gaseous carbon dioxide. there is.

상기 이산화탄소 액화장치는, 상기 보조압축유닛 전단의 상기 제2 배출관에서 분기되어 상기 기상의 이산화탄소를 외부로 방출하는 벤트관을 더 포함할 수 있다.The carbon dioxide liquefaction device may further include a vent pipe branching from the second discharge pipe at the front end of the auxiliary compression unit to discharge the gaseous carbon dioxide to the outside.

상기 이산화탄소 액화장치는, 상기 열교환기와 상기 팽창밸브 사이의 상기 이산화탄소공급라인 상에 설치되어, 상기 팽창밸브로 공급되는 이산화탄소와 상기 보조압축유닛으로 공급되는 상기 기상의 이산화탄소를 열교환하는 보조열교환기를 더 포함할 수 있다.The carbon dioxide liquefaction device further includes an auxiliary heat exchanger installed on the carbon dioxide supply line between the heat exchanger and the expansion valve to exchange heat between the carbon dioxide supplied to the expansion valve and the gaseous carbon dioxide supplied to the auxiliary compression unit. can do.

상기 이산화탄소 액화장치는, 상기 보조열교환기와 상기 보조압축유닛 사이의 상기 제2 배출관에서 분기되어 상기 기상의 이산화탄소를 외부로 방출하는 벤트관을 더 포함할 수 있다.The carbon dioxide liquefaction device may further include a vent pipe branched from the second discharge pipe between the auxiliary heat exchanger and the auxiliary compression unit to discharge the gaseous carbon dioxide to the outside.

본 발명에 따르면, 액화천연가스와 이산화탄소를 직접 열교환하지 않고 글리콜 워터와 같은 매체를 통해 액화천연가스의 냉열을 간접적으로 회수하여 이산화탄소를 냉각시킬 수 있다. 따라서, 이산화탄소 액화 목적을 달성하면서, 액화 과정에서 드라이아이스가 생성되는 것을 방지하여 연료 공급을 위해 액화천연가스를 기화시키는 가열유닛의 열교환 성능을 안정적으로 유지시킬 수 있다.According to the present invention, it is possible to cool carbon dioxide by indirectly recovering cold heat of liquefied natural gas through a medium such as glycol water without directly exchanging heat between liquefied natural gas and carbon dioxide. Therefore, while achieving the purpose of liquefying carbon dioxide, it is possible to prevent dry ice from being generated during the liquefaction process, thereby stably maintaining heat exchange performance of a heating unit that vaporizes liquefied natural gas for fuel supply.

또한, 가열유닛의 열교환 성능이 안정적으로 유지됨에 따라, 연소기관에서 요구되는 온도로 연료가 충분히 가열된 후 공급될 수 있어 연소 효율도 향상될 수 있다.In addition, as the heat exchange performance of the heating unit is stably maintained, the fuel can be supplied after being sufficiently heated to a temperature required by the combustion engine, thereby improving combustion efficiency.

도 1은 본 발명의 일 실시예에 따른 이산화탄소 액화장치를 도시한 도면이다.
도 2는 도 1의 이산화탄소 액화장치의 동작을 설명하기 위한 작동도이다.
도 3은 본 발명의 다른 실시예에 따른 이산화탄소 액화장치의 동작을 설명하기 위한 작동도이다.
도 4는 본 발명의 또 다른 실시예에 따른 이산화탄소 액화장치의 동작을 설명하기 위한 작동도이다.1 is a view showing a carbon dioxide liquefier according to an embodiment of the present invention.
FIG. 2 is an operation diagram for explaining the operation of the carbon dioxide liquefier of FIG. 1 .
3 is an operation diagram for explaining the operation of a carbon dioxide liquefier according to another embodiment of the present invention.
4 is an operating diagram for explaining the operation of a carbon dioxide liquefier according to another embodiment of the present invention.

본 발명의 이점 및 특징, 그리고 그것들을 달성하는 방법은 첨부되는 도면과 함께 상세하게 후술되어 있는 실시예들을 참조하면 명확해질 것이다. 그러나 본 발명은 이하에서 개시되는 실시예들에 한정되는 것이 아니라 서로 다른 다양한 형태로 구현될 수 있으며, 단지 본 실시예들은 본 발명의 개시가 완전하도록 하고, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 발명의 범주를 완전하게 알려주기 위해 제공되는 것이며, 본 발명은 청구항의 범주에 의해 정의될 뿐이다. 명세서 전체에 걸쳐 동일 참조 부호는 동일 구성 요소를 지칭한다.Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

이하, 도 1 내지 도 2를 참조하여, 본 발명의 일 실시예에 따른 이산화탄소 액화장치에 관하여 상세히 설명한다.Hereinafter, with reference to FIGS. 1 and 2, a carbon dioxide liquefaction apparatus according to an embodiment of the present invention will be described in detail.

본 발명에 따른 이산화탄소 액화장치는 선박에서 발생된 이산화탄소를 액화시키는 장치로, 예를 들어, 배기가스에 포함된 이산화탄소를 포집하는 이산화탄소포집장치를 구비한 선박에 적용될 수 있다.The carbon dioxide liquefaction device according to the present invention is a device for liquefying carbon dioxide generated in a ship, and may be applied to a ship equipped with a carbon dioxide capture device for collecting carbon dioxide contained in exhaust gas, for example.

이산화탄소 액화장치는 액화천연가스와 이산화탄소를 직접 열교환하지 않고 글리콜 워터와 같은 매체를 통해 액화천연가스의 냉열을 간접적으로 회수하여 이산화탄소를 냉각시킬 수 있다. 따라서, 이산화탄소 액화 목적을 달성하면서, 액화 과정에서 드라이아이스가 생성되는 것을 방지하여 연료 공급을 위해 액화천연가스를 기화시키는 가열유닛의 열교환 성능을 안정적으로 유지시킬 수 있다. 또한, 가열유닛의 열교환 성능이 안정적으로 유지됨에 따라, 연소기관에서 요구되는 온도로 연료가 충분히 가열된 후 공급될 수 있어 연소 효율도 향상될 수 있는 특징이 있다.The carbon dioxide liquefier may cool carbon dioxide by indirectly recovering cold heat of the liquefied natural gas through a medium such as glycol water without directly exchanging heat between the liquefied natural gas and the carbon dioxide. Therefore, while achieving the purpose of liquefying carbon dioxide, it is possible to prevent dry ice from being generated during the liquefaction process, thereby stably maintaining heat exchange performance of a heating unit that vaporizes liquefied natural gas for fuel supply. In addition, as the heat exchange performance of the heating unit is stably maintained, the fuel can be supplied after being sufficiently heated to a temperature required by the combustion engine, thereby improving combustion efficiency.

이하, 도 1을 참조하여, 이산화탄소 액화장치(1)에 관하여 구체적으로 설명한다.Hereinafter, with reference to FIG. 1, the carbon dioxide liquefaction device 1 will be described in detail.

도 1은 본 발명의 일 실시예에 따른 이산화탄소 액화장치를 도시한 도면이다.1 is a view showing a carbon dioxide liquefier according to an embodiment of the present invention.

본 발명에 따른 이산화탄소 액화장치(1)는 이산화탄소공급라인(10), 열교환기(20), 팽창밸브(30), 기액분리기(40), 연료공급라인(50), 가열유닛(60a, 60b), 및 냉매순환라인(70)을 포함한다.The carbon dioxide liquefaction device 1 according to the present invention includes a carbon dioxide supply line 10, a heat exchanger 20, an expansion valve 30, a gas-liquid separator 40, a fuel supply line 50, and a heating unit 60a, 60b , and a refrigerant circulation line 70.

이산화탄소공급라인(10)은 선박에서 발생된 이산화탄소를 공급받는 관으로, 예를 들어, 배기가스에 포함된 이산화탄소를 포집하는 이산화탄소포집장치(G)에 연결될 수 있다. 이산화탄소포집장치(G)에서 포집된 이산화탄소는 압축되어 탈수 과정을 거치므로, 약 25bar의 이산화탄소가 이산화탄소공급라인(10)으로 공급될 수 있다. 이산화탄소공급라인(10) 상에는 후술할 열교환기(20)와, 팽창밸브(30), 및 기액분리기(40)가 차례로 설치되며, 열교환기(20) 전단에는 적어도 하나의 압축유닛(80)이 설치될 수 있다.The carbon dioxide supply line 10 is a pipe for receiving carbon dioxide generated in a ship, and may be connected to, for example, a carbon dioxide collecting device G for collecting carbon dioxide included in exhaust gas. Since the carbon dioxide collected in the carbon dioxide capture device G is compressed and subjected to a dehydration process, about 25 bar of carbon dioxide can be supplied to the carbon dioxide supply line 10 . A heat exchanger 20 to be described later, an expansion valve 30, and a gas-liquid separator 40 are sequentially installed on the carbon dioxide supply line 10, and at least one compression unit 80 is installed in front of the heat exchanger 20. It can be.

압축유닛(80)은 이산화탄소포집장치(G)에서 공급받은 이산화탄소를 가압하는 압축기(81)와, 압축기(81) 후단에 설치되어 가압된 이산화탄소를 냉각하는 냉각기(82)를 포함할 수 있다. 압축기(81)는 이산화탄소를 약 100bar로 가압할 수 있으며, 냉각기(82)는 고압으로 가압되어 온도가 증가한 이산화탄소를 냉각하여 열교환기(20)의 냉각 효율이 저하되는 것을 방지할 수 있다.The compression unit 80 may include a compressor 81 pressurizing the carbon dioxide supplied from the carbon dioxide capture device G, and a cooler 82 installed at a rear end of the compressor 81 to cool the pressurized carbon dioxide. The compressor 81 can pressurize the carbon dioxide at about 100 bar, and the cooler 82 can prevent the cooling efficiency of the heat exchanger 20 from deteriorating by cooling the carbon dioxide whose temperature has increased by being pressurized at a high pressure.

열교환기(20)는 압축유닛(80)을 통과한 이산화탄소를 냉매와 열교환하여 냉각시키는 것으로, 이산화탄소공급라인(10)과 후술할 냉매순환라인(70)이 통과할 수 있다. 즉, 이산화탄소공급라인(10)을 유동하는 이산화탄소는, 열교환기(20)에서 냉매순환라인(70)을 유동하는 냉매와 열교환하여 냉각되고, 냉매는 가열되어 냉매순환라인(70)을 순환할 수 있다. 이 때, 냉매는 한정될 것은 아니나, 글리콜 워터일 수 있다.열교환기(20)에서 냉각된 이산화탄소는 이산화탄소공급라인(10)을 따라 유동하여 팽창밸브(30)를 통과한다.The heat exchanger 20 cools the carbon dioxide passing through the compression unit 80 by exchanging heat with the refrigerant, and the carbon dioxide supply line 10 and the refrigerant circulation line 70 to be described later may pass therethrough. That is, the carbon dioxide flowing through the carbon dioxide supply line 10 is cooled by exchanging heat with the refrigerant flowing through the refrigerant circulation line 70 in the heat exchanger 20, and the refrigerant is heated to circulate through the refrigerant circulation line 70. there is. At this time, the refrigerant may be, but is not limited to, glycol water. The carbon dioxide cooled in the heat exchanger 20 flows along the carbon dioxide supply line 10 and passes through the expansion valve 30 .

팽창밸브(30)는 이산화탄소를 감압하는 것으로, 통상의 줄-톰슨 밸브일 수 있다. 팽창밸브(30)는 후술할 저장탱크(100)에서 요구되는 압력에 맞추어 약 6bar 이상으로 이산화탄소를 감압하며, 이로 인해, 이산화탄소가 적어도 일부 액화될 수 있다. 그러나, 열교환기(20) 후단의 이산화탄소공급라인(10) 상에 팽창밸브(30)가 설치되는 것으로 한정될 것은 아니며, 이산화탄소를 감압할 수 있는 다양한 구조로 변형될 수도 있다. 팽창밸브(30)를 통과하여 적어도 일부가 액화된 이산화탄소는 이산화탄소공급라인(10)을 따라 기액분리기(40)로 유동한다.The expansion valve 30 reduces carbon dioxide and may be a conventional Joule-Thomson valve. The expansion valve 30 reduces the carbon dioxide to about 6 bar or more according to the pressure required in the storage tank 100 to be described later, and as a result, the carbon dioxide may be at least partially liquefied. However, it is not limited to that the expansion valve 30 is installed on the carbon dioxide supply line 10 at the rear end of the heat exchanger 20, and may be modified into various structures capable of reducing carbon dioxide. At least partially liquefied carbon dioxide passing through the expansion valve 30 flows to the gas-liquid separator 40 along the carbon dioxide supply line 10 .

기액분리기(40)는 액상의 이산화탄소와 기상의 이산화탄소를 분리하는 것으로, 통상의 중력분리기일 수 있다. 액상의 이산화탄소는 기액분리기(40) 하단에 연결된 제1 배출관(41)을 통해 배출되며, 제1 배출관(41)은 기액분리기(40)에서 분리된 액상의 이산화탄소를 저장탱크(100)로 공급할 수 있다. 저장탱크(100)는 액상의 이산화탄소를 저장하는 탱크로, 설계 압력이 약 6bar 이상일 수 있다. 기상의 이산화탄소는 기액분리기(40) 상단에 연결된 제2 배출관(42)을 통해 배출되며, 제2 배출관(42)은 기액분리기(40)에서 분리된 기상의 이산화탄소를 기액분리기(40) 외부로 배출할 수 있다.The gas-liquid separator 40 separates liquid carbon dioxide and gaseous carbon dioxide, and may be a conventional gravity separator. Liquid carbon dioxide is discharged through the first discharge pipe 41 connected to the lower end of the gas-liquid separator 40, and the first discharge pipe 41 can supply the liquid carbon dioxide separated in the gas-liquid separator 40 to the storage tank 100. there is. The storage tank 100 is a tank for storing liquid carbon dioxide and may have a design pressure of about 6 bar or more. Gas-phase carbon dioxide is discharged through the second discharge pipe 42 connected to the top of the gas-liquid separator 40, and the second discharge pipe 42 discharges gas-phase carbon dioxide separated from the gas-liquid separator 40 to the outside of the gas-liquid separator 40. can do.

한편, 선박의 구동에 필요한 각종 동력은 연소기관(EG)에서 생성되며, 연소기관(EG)은 연료공급라인(50)을 통해 연료를 공급받을 수 있다. 여기서, 연소기관(EG)이라 함은, 액화천연가스, 보다 구체적으로, 액화천연가스가 기화되어 생성된 천연가스인 연료와 공기를 연소하여 동력을 생성하는 장치를 통칭하며, 예를 들어, 선박의 추진에 필요한 동력을 생성하는 메인 엔진(main engine)일 수 있다. 연소기관(EG)에서 연료의 연소에 따라 발생된 배기가스는 이산화탄소포집장치(G)로 공급되어 이산화탄소가 제거되고, 이산화탄소포집장치(G)에서 포집된 이산화탄소는 이산화탄소공급라인(10)으로 공급될 수 있다.On the other hand, various powers required for driving the ship are generated in the combustion engine (EG), and the combustion engine (EG) can receive fuel through the fuel supply line (50). Here, the combustion engine (EG) refers to a device that generates power by burning liquefied natural gas, more specifically, fuel and air, which is natural gas generated by vaporizing liquefied natural gas, and, for example, ships It may be a main engine that generates the power required for propulsion. Exhaust gas generated by the combustion of fuel in the combustion engine (EG) is supplied to the carbon dioxide capture device (G) to remove carbon dioxide, and the carbon dioxide collected in the carbon dioxide capture device (G) is supplied to the carbon dioxide supply line (10). can

연료공급라인(50)은 연료탱크(TK)로부터 공급받은 액화천연가스를 가압하고 가열하여 연소기관(EG)으로 공급하는 관으로, 일단이 연료탱크(TK)에 연결되고 타단이 연소기관(EG)에 연결될 수 있다. 여기서, 연료탱크(TK)라 함은 액화천연가스를 저장하는 탱크로, 외부로부터 전달되는 열에 의한 액화천연가스의 기화를 최소화하기 위해 밀봉 및 단열 처리될 수 있다. 연료탱크(TK)는, 예를 들어, 멤브레인(membrane) 탱크이거나 압력식 C-type 탱크일 수 있다. 연료탱크(TK)가 압력식 C-type 탱크일 경우, 설치 비용은 증가하나 운전 압력이 멤브레인 탱크에 비해 높아 액화천연가스가 자연 기화하여 생성된 증발가스의 저장에 따른 압력 및 온도 증가를 허용 범위 내에서 버텨낼 수 있을 뿐만 아니라 허용할 수 있는 범위도 커 더 많은 양의 증발가스를 더 오랜 시간 동안 저장할 수 있다. 연료공급라인(50) 상에는 적어도 하나의 펌프(61)와 가열유닛(60a, 60b)이 차례로 설치된다.The fuel supply line 50 is a pipe that pressurizes and heats the liquefied natural gas supplied from the fuel tank TK and supplies it to the combustion engine EG. One end is connected to the fuel tank TK and the other end is connected to the combustion engine EG. ) can be connected to Here, the fuel tank (TK) is a tank for storing liquefied natural gas, and may be sealed and insulated to minimize vaporization of liquefied natural gas by heat transferred from the outside. The fuel tank TK may be, for example, a membrane tank or a pressure type C-type tank. If the fuel tank (TK) is a pressure-type C-type tank, the installation cost increases, but the operating pressure is higher than that of the membrane tank, so the pressure and temperature increase due to the storage of boil-off gas generated by natural gasification of liquefied natural gas is allowed. Not only can it withstand within the range, but the allowable range is large, so a larger amount of evaporation gas can be stored for a longer period of time. At least one pump 61 and heating units 60a and 60b are sequentially installed on the fuel supply line 50 .

펌프(61)는 액화천연가스의 이동이 원활하고 가열유닛(60a, 60b)에서 액화천연가스가 용이하게 기화될 수 있도록 액화천연가스를 가압하며, 가열유닛(60a, 60b)은 기화기(vaporizer, 60a)와 재가열기화기(trim heater, 60b)를 포함하여 가압된 액화천연가스를 냉매와 열교환하여 천연가스로 기화시킬 수 있다. 즉, 연료공급라인(50)을 유동하는 액화천연가스는, 가열유닛(60a, 60b)에서 냉매순환라인(70)을 유동하는 냉매와 열교환하여 가열되고, 냉매는 냉각되어 냉매순환라인(70)을 순환할 수 있다. 가열유닛(60a, 60b)에서 액화천연가스가 기화되어 생성된 천연가스는 연료공급라인(50)을 따라 연소기관(EG)으로 공급되어 연료로 사용될 수 있다.The pump 61 pressurizes the liquefied natural gas so that the liquefied natural gas moves smoothly and the liquefied natural gas can be easily vaporized in the heating units 60a and 60b, and the heating units 60a and 60b are vaporizers. 60a) and a trim heater (60b), the pressurized liquefied natural gas may be vaporized into natural gas by exchanging heat with a refrigerant. That is, the liquefied natural gas flowing through the fuel supply line 50 is heated by exchanging heat with the refrigerant flowing through the refrigerant circulation line 70 in the heating units 60a and 60b, and the refrigerant is cooled and the refrigerant circulation line 70 can cycle. Natural gas generated by vaporizing liquefied natural gas in the heating units 60a and 60b is supplied to the combustion engine EG along the fuel supply line 50 and may be used as fuel.

전술한 바와 같이, 열교환기(20)는 이산화탄소를 냉매와 열교환하여 냉각시키고, 가열유닛(60a, 60b)은 액화천연가스를 냉매와 열교환하여 기화시킨다. 냉매는 냉매순환라인(70)을 따라 유동하며, 냉매순환라인(70)은 폐루프 독립 사이클을 구성하여 열교환기(20)와 가열유닛(60a, 60b)을 경유할 수 있다. 보다 구체적으로, 열교환기(20)에서 이산화탄소와 열교환하여 가열된 냉매는 냉매순환라인(70)을 따라 분기되어 가열유닛(60a, 60b)으로 이동하고, 가열유닛(60a, 60b)에서 액화천연가스와 열교환하여 냉각된 냉매는 냉매순환라인(70)을 따라 합류되어 열교환기(20)로 이동할 수 있다. 가열유닛(60a, 60b) 전단의 냉매순환라인(70) 상에는 적어도 하나의 히터(71)와 펌프(72)가 설치되므로, 열교환기(20)를 경유하여 가열된 냉매는 히터(71)에서 추가로 가열된 후 펌프(72)에서 가압되어 가열유닛(60a, 60b)으로 공급될 수 있다.As described above, the heat exchanger 20 cools the carbon dioxide by exchanging heat with the refrigerant, and the heating units 60a and 60b vaporize the liquefied natural gas by exchanging heat with the refrigerant. The refrigerant flows along the refrigerant circulation line 70, and the refrigerant circulation line 70 can form a closed loop independent cycle and pass through the heat exchanger 20 and the heating units 60a and 60b. More specifically, the refrigerant heated by heat exchange with carbon dioxide in the heat exchanger 20 is branched along the refrigerant circulation line 70 and moved to the heating units 60a and 60b, and in the heating units 60a and 60b, the liquefied natural gas The refrigerant cooled by heat exchange with may join along the refrigerant circulation line 70 and move to the heat exchanger 20. Since at least one heater 71 and a pump 72 are installed on the refrigerant circulation line 70 at the front of the heating units 60a and 60b, the refrigerant heated via the heat exchanger 20 is added from the heater 71. After being heated, it can be pressurized by the pump 72 and supplied to the heating units 60a and 60b.

액화천연가스와 이산화탄소를 직접 열교환하지 않고 냉매를 통해 액화천연가스의 냉열을 간접적으로 회수하여 이산화탄소를 냉각시킴으로써, 이산화탄소 액화 목적을 달성하면서, 액화 과정에서 드라이아이스가 생성되는 것을 방지하여 가열유닛(60a, 60b)의 열교환 성능도 안정적으로 유지시킬 수 있다. 또한, 가열유닛(60a, 60b)의 열교환 성능이 안정적으로 유지됨에 따라, 연소기관(EG)에서 요구되는 온도로 연료가 충분히 가열된 후 공급될 수 있어 연소기관(EG)의 연소 효율도 향상될 수 있다.By indirectly recovering the cold heat of the liquefied natural gas through a refrigerant and cooling the carbon dioxide without directly exchanging heat between the liquefied natural gas and carbon dioxide, the heating unit 60a prevents dry ice from being generated during the liquefaction process while achieving the purpose of liquefying the carbon dioxide. , 60b) can also stably maintain the heat exchange performance. In addition, as the heat exchange performance of the heating units 60a and 60b is maintained stably, the fuel can be supplied after being sufficiently heated to the temperature required by the combustion engine EG, so that the combustion efficiency of the combustion engine EG can be improved. can

이하, 도 2를 참조하여, 이산화탄소 액화장치(1)의 동작에 대해 보다 구체적으로 설명한다.Hereinafter, with reference to FIG. 2, the operation of the carbon dioxide liquefier 1 will be described in more detail.

도 2는 도 1의 이산화탄소 액화장치의 동작을 설명하기 위한 작동도이다.FIG. 2 is an operation diagram for explaining the operation of the carbon dioxide liquefier of FIG. 1 .

본 발명에 따른 이산화탄소 액화장치(1)는 액화천연가스와 이산화탄소를 직접 열교환하지 않고 글리콜 워터와 같은 매체를 통해 액화천연가스의 냉열을 간접적으로 회수하여 이산화탄소를 냉각시킬 수 있다. 따라서, 이산화탄소 액화 목적을 달성하면서, 액화 과정에서 드라이아이스가 생성되는 것을 방지하여 연료 공급을 위해 액화천연가스를 기화시키는 가열유닛(60a, 60b)의 열교환 성능을 안정적으로 유지시킬 수 있다. 또한, 가열유닛(60a, 60b)의 열교환 성능이 안정적으로 유지됨에 따라, 연소기관(EG)에서 요구되는 온도로 연료가 충분히 가열된 후 공급될 수 있어 연소 효율도 향상될 수 있다.The carbon dioxide liquefaction apparatus 1 according to the present invention can cool carbon dioxide by indirectly recovering cold heat of liquefied natural gas through a medium such as glycol water without directly exchanging heat between liquefied natural gas and carbon dioxide. Therefore, it is possible to stably maintain the heat exchange performance of the heating units 60a and 60b that vaporize the liquefied natural gas for fuel supply by preventing dry ice from being generated during the liquefaction process while achieving the purpose of liquefying carbon dioxide. In addition, as the heat exchange performance of the heating units 60a and 60b is stably maintained, the fuel can be supplied after being sufficiently heated to a temperature required by the combustion engine EG, so that combustion efficiency can be improved.

연료탱크(TK)에 저장된 액화천연가스는 연료공급라인(50)을 따라 이동하여 펌프(61)에서 가압되고, 가열유닛(60a, 60b)에서 냉매순환라인(70)을 순환하는 냉매와 열교환하여 천연가스로 기화된다. 가열유닛(60a, 60b)으로 공급되는 냉매는 히터(71) 및 펌프(72)를 통과하며 가열 및 가압된 상태이므로, 액화천연가스는 냉매와 열교환을 통해 용이하게 기화될 수 있다. 액화천연가스가 기화되어 생성된 천연가스는 연료공급라인(50)을 따라 연소기관(EG)으로 공급되며, 연소기관(EG)은 천연가스인 연료와 공기를 연소하여 동력을 생성한다. 연소기관(EG)에서 연료의 연소에 따라 발생된 배기가스는 이산화탄소포집장치(G)로 공급되어 이산화탄소가 제거되고, 이산화탄소포집장치(G)에서 포집된 이산화탄소는 이산화탄소공급라인(10)으로 공급될 수 있다.The liquefied natural gas stored in the fuel tank (TK) moves along the fuel supply line 50, is pressurized by the pump 61, and heat exchanges with the refrigerant circulating in the refrigerant circulation line 70 in the heating units 60a and 60b. vaporized to natural gas Since the refrigerant supplied to the heating units 60a and 60b passes through the heater 71 and the pump 72 and is heated and pressurized, the liquefied natural gas can be easily vaporized through heat exchange with the refrigerant. Natural gas generated by vaporizing liquefied natural gas is supplied to the combustion engine EG along the fuel supply line 50, and the combustion engine EG generates power by burning natural gas fuel and air. Exhaust gas generated by the combustion of fuel in the combustion engine (EG) is supplied to the carbon dioxide capture device (G) to remove carbon dioxide, and the carbon dioxide collected in the carbon dioxide capture device (G) is supplied to the carbon dioxide supply line (10). can

이산화탄소공급라인(10)으로 공급된 이산화탄소는 압축유닛(80)의 압축기(81)와 냉각기(82)를 차례로 통과하며 가압 및 냉각되고, 열교환기(20)에서 냉매순환라인(70)을 순환하는 냉매와 열교환하여 냉각된다. 열교환기(20)로 공급되는 냉매는 가열유닛(60a, 60b)을 통과하며 냉각된 상태이므로, 이산화탄소는 냉매와 열교환을 통해 용이하게 냉각될 수 있다. 냉각된 이산화탄소는 팽창밸브(30)로 이동하여 감압되며, 이로 인해, 이산화탄소의 적어도 일부가 액화될 수 있다. 적어도 일부가 액화된 이산화탄소는 기액분리기(40)로 이동하여, 액상의 이산화탄소와 기상의 이산화탄소가 분리된다. 기액분리기(40)에서 분리된 액상의 이산화탄소는 제1 배출관(41)으로 배출되어 저장탱크(100)에 저장되고, 기액분리기(40)에서 분리된 기상의 이산화탄소는 제2 배출관(42)으로 배출되어 외부로 방출될 수 있다.The carbon dioxide supplied to the carbon dioxide supply line 10 passes through the compressor 81 of the compression unit 80 and the cooler 82 in turn, is pressurized and cooled, and circulates through the refrigerant circulation line 70 in the heat exchanger 20. It cools by exchanging heat with the refrigerant. Since the refrigerant supplied to the heat exchanger 20 passes through the heating units 60a and 60b and is cooled, carbon dioxide can be easily cooled through heat exchange with the refrigerant. The cooled carbon dioxide moves to the expansion valve 30 and is depressurized, whereby at least a portion of the carbon dioxide may be liquefied. At least a part of the liquefied carbon dioxide is moved to the gas-liquid separator 40, and the liquid carbon dioxide and gaseous carbon dioxide are separated. Liquid carbon dioxide separated from the gas-liquid separator 40 is discharged through the first discharge pipe 41 and stored in the storage tank 100, and gaseous carbon dioxide separated from the gas-liquid separator 40 is discharged through the second discharge pipe 42. and can be released to the outside.

이하, 도 3을 참조하여, 본 발명의 다른 실시예에 따른 이산화탄소 액화장치(1-1)에 관하여 구체적으로 설명한다.Hereinafter, with reference to FIG. 3, a carbon dioxide liquefaction apparatus 1-1 according to another embodiment of the present invention will be described in detail.

도 3은 본 발명의 다른 실시예에 따른 이산화탄소 액화장치의 동작을 설명하기 위한 작동도이다.3 is an operation diagram for explaining the operation of a carbon dioxide liquefier according to another embodiment of the present invention.

본 발명의 다른 실시예에 따른 이산화탄소 액화장치(1-1)는 제2 배출관(42)이 압축유닛(80) 전단의 이산화탄소공급라인(10) 상에 연결되고, 제2 배출관(42) 상에 기상의 이산화탄소를 가압하고 냉각하는 보조압축유닛(90)이 설치된다. 본 발명의 다른 실시예에 따른 이산화탄소 액화장치(1-1)는 제2 배출관(42)이 압축유닛(80) 전단의 이산화탄소공급라인(10) 상에 연결되고, 제2 배출관(42) 상에 기상의 이산화탄소를 가압하고 냉각하는 보조압축유닛(90)이 설치되는 것을 제외하면, 전술한 실시예와 실질적으로 동일하다. 따라서, 이를 중점적으로 설명하되 별도의 언급이 없는 한 나머지 구성부에 대한 설명은 전술한 사항으로 대신한다.In the carbon dioxide liquefaction device 1-1 according to another embodiment of the present invention, the second discharge pipe 42 is connected to the carbon dioxide supply line 10 at the front of the compression unit 80, and on the second discharge pipe 42 An auxiliary compression unit 90 for pressurizing and cooling gaseous carbon dioxide is installed. In the carbon dioxide liquefaction device 1-1 according to another embodiment of the present invention, the second discharge pipe 42 is connected to the carbon dioxide supply line 10 at the front of the compression unit 80, and on the second discharge pipe 42 Except that the auxiliary compression unit 90 for pressurizing and cooling gaseous carbon dioxide is installed, it is substantially the same as the above-described embodiment. Therefore, this will be mainly described, but unless otherwise noted, the description of the remaining components will be replaced with the above-described items.

기액분리기(40) 상단에 연결된 제2 배출관(42)은 압축유닛(80) 전단의 이산화탄소공급라인(10) 상에 연결되고, 제2 배출관(42) 상에는 기상의 이산화탄소를 가압하고 냉각하는 보조압축유닛(90)이 설치된다. 보조압축유닛(90)은 기상의 이산화탄소를 가압하는 보조압축기(91)와, 보조압축기(91) 후단에 설치되어 가압된 기상의 이산화탄소를 냉각하는 보조냉각기(92)를 포함할 수 있다. 제2 배출관(42)이 압축유닛(80) 전단의 이산화탄소공급라인(10) 상에 연결되고, 제2 배출관(42) 상에 보조압축유닛(90)이 설치됨으로써, 장치의 액화 효율이 증대될 수 있고 외부로 방출되는 기상의 이산화탄소의 양도 줄일 수 있어 이로 인한 대기 오염을 방지할 수 있다. 보조압축유닛(90) 전단의 제2 배출관(42)에는 기액분리기(40)에서 분리된 기상의 이산화탄소 중 일부를 외부로 방출하는 벤트관(43)이 분기된다. 제2 배출관(42) 상에 벤트관(43)이 분기됨으로써, 이산화탄소에 포함될 수 있는 질소 또는 일산화탄소와 같은 불응축 가스를 외부로 방출할 수 있다. 불응축 가스는 액화 장치에서 액화되지 않고 누적되면서 액화 효율을 감소시키므로, 벤트관(43)을 통해 기상의 이산화탄소 일부와 불응축 가스를 외부로 방출하여 액화 효율을 일정하게 유지시킬 수 있다. The second discharge pipe 42 connected to the top of the gas-liquid separator 40 is connected to the carbon dioxide supply line 10 at the front end of the compression unit 80, and on the second discharge pipe 42, auxiliary compression for pressurizing and cooling gaseous carbon dioxide Unit 90 is installed. The auxiliary compression unit 90 may include an auxiliary compressor 91 for pressurizing gaseous carbon dioxide and an auxiliary cooler 92 installed at a rear end of the auxiliary compressor 91 to cool the pressurized gaseous carbon dioxide. The second discharge pipe 42 is connected to the carbon dioxide supply line 10 in front of the compression unit 80, and the auxiliary compression unit 90 is installed on the second discharge pipe 42, thereby increasing the liquefaction efficiency of the device. It can also reduce the amount of gaseous carbon dioxide emitted to the outside, thereby preventing air pollution. A vent pipe 43 for discharging some of the gaseous carbon dioxide separated in the gas-liquid separator 40 to the outside is branched to the second discharge pipe 42 at the front end of the auxiliary compression unit 90 . By branching the vent pipe 43 on the second discharge pipe 42, non-condensable gas such as nitrogen or carbon monoxide, which may be included in carbon dioxide, may be discharged to the outside. Since the non-condensable gas is accumulated without being liquefied in the liquefier and reduces the liquefaction efficiency, the liquefaction efficiency can be maintained constant by discharging part of the gaseous carbon dioxide and the non-condensable gas to the outside through the vent pipe 43.

이하, 도 4를 참조하여, 본 발명의 또 다른 실시예에 따른 이산화탄소 액화장치(1-2)에 관하여 구체적으로 설명한다.Hereinafter, with reference to FIG. 4, a carbon dioxide liquefaction apparatus 1-2 according to another embodiment of the present invention will be described in detail.

도 4는 본 발명의 또 다른 실시예에 따른 이산화탄소 액화장치의 동작을 설명하기 위한 작동도이다.4 is an operating diagram for explaining the operation of a carbon dioxide liquefier according to another embodiment of the present invention.

본 발명의 또 다른 실시예에 따른 이산화탄소 액화장치(1-2)는 제2 배출관(42)이 압축유닛(80) 전단의 이산화탄소공급라인(10) 상에 연결되고, 제2 배출관(42) 상에 기상의 이산화탄소를 가압하고 냉각하는 보조압축유닛(90)이 설치되며, 열교환기(20)와 팽창밸브(30) 사이의 이산화탄소공급라인(10) 상에 팽창밸브(30)로 공급되는 이산화탄소와 보조압축유닛(90)으로 공급되는 기상의 이산화탄소를 열교환하는 보조열교환기(11)가 설치된다. 본 발명의 또 다른 실시예에 따른 이산화탄소 액화장치(1-2)는 제2 배출관(42)이 압축유닛(80) 전단의 이산화탄소공급라인(10) 상에 연결되고, 제2 배출관(42) 상에 기상의 이산화탄소를 가압하고 냉각하는 보조압축유닛(90)이 설치되며, 열교환기(20)와 팽창밸브(30) 사이의 이산화탄소공급라인(10) 상에 팽창밸브(30)로 공급되는 이산화탄소와 보조압축유닛(90)으로 공급되는 기상의 이산화탄소를 열교환하는 보조열교환기(11)가 설치되는 것을 제외하면, 전술한 실시예와 실질적으로 동일하다. 따라서, 이를 중점적으로 설명하되 별도의 언급이 없는 한 나머지 구성부에 대한 설명은 전술한 사항으로 대신한다.In the carbon dioxide liquefaction device 1-2 according to another embodiment of the present invention, the second discharge pipe 42 is connected to the carbon dioxide supply line 10 at the front of the compression unit 80, and the second discharge pipe 42 An auxiliary compression unit 90 for pressurizing and cooling gaseous carbon dioxide is installed, and the carbon dioxide supplied to the expansion valve 30 on the carbon dioxide supply line 10 between the heat exchanger 20 and the expansion valve 30 and An auxiliary heat exchanger 11 for heat exchange of gaseous carbon dioxide supplied to the auxiliary compression unit 90 is installed. In the carbon dioxide liquefaction device 1-2 according to another embodiment of the present invention, the second discharge pipe 42 is connected to the carbon dioxide supply line 10 at the front of the compression unit 80, and the second discharge pipe 42 An auxiliary compression unit 90 for pressurizing and cooling gaseous carbon dioxide is installed, and the carbon dioxide supplied to the expansion valve 30 on the carbon dioxide supply line 10 between the heat exchanger 20 and the expansion valve 30 and Except that the auxiliary heat exchanger 11 for exchanging heat with gaseous carbon dioxide supplied to the auxiliary compression unit 90 is installed, it is substantially the same as the foregoing embodiment. Therefore, this will be mainly described, but unless otherwise noted, the description of the remaining components will be replaced with the above-described items.

기액분리기(40) 상단에 연결된 제2 배출관(42)은 압축유닛(80) 전단의 이산화탄소공급라인(10) 상에 연결되고, 제2 배출관(42) 상에는 보조압축기(91)와 보조냉각기(92)를 포함하여 기상의 이산화탄소를 가압하고 냉각하는 보조압축유닛(90)이 설치된다.The second discharge pipe 42 connected to the top of the gas-liquid separator 40 is connected to the carbon dioxide supply line 10 at the front of the compression unit 80, and on the second discharge pipe 42, the auxiliary compressor 91 and the auxiliary cooler 92 ) Including, an auxiliary compression unit 90 for pressurizing and cooling gaseous carbon dioxide is installed.

또한, 열교환기(20)와 팽창밸브(30) 사이의 이산화탄소공급라인(10) 상에는, 팽창밸브(30)로 공급되는 이산화탄소와, 보조압축유닛(90)으로 공급되는 기상의 이산화탄소를 열교환하는 보조열교환기(11)가 설치된다. 보조열교환기(11)가 팽창밸브(30)로 공급되는 이산화탄소와, 보조압축유닛(90)으로 공급되는 기상의 이산화탄소를 열교환함으로써, 팽창밸브(30)로 공급되는 이산화탄소가 추가 냉각되어 팽창밸브(30) 통과 시 더욱 용이하게 액화될 수 있다. 보조열교환기(11)와 보조압축유닛(90) 사이의 제2 배출관(42)에는 보조열교환기(11)를 통과한 기상의 이산화탄소를 외부로 방출하는 벤트관(43)이 분기되므로, 필요 시 벤트관(43)을 개방하여 기상의 이산화탄소를 외부로 방출할 수도 있다.In addition, on the carbon dioxide supply line 10 between the heat exchanger 20 and the expansion valve 30, an auxiliary heat exchanger between carbon dioxide supplied to the expansion valve 30 and gaseous carbon dioxide supplied to the auxiliary compression unit 90 A heat exchanger 11 is installed. The auxiliary heat exchanger 11 heat-exchanges the carbon dioxide supplied to the expansion valve 30 with the gaseous carbon dioxide supplied to the auxiliary compression unit 90, so that the carbon dioxide supplied to the expansion valve 30 is further cooled and the expansion valve ( 30) It can be more easily liquefied when passing through. Since the second discharge pipe 42 between the auxiliary heat exchanger 11 and the auxiliary compression unit 90 is branched, the vent pipe 43 for discharging gaseous carbon dioxide that has passed through the auxiliary heat exchanger 11 to the outside is branched, if necessary. The gaseous carbon dioxide may be discharged to the outside by opening the vent pipe 43 .

이상 첨부된 도면을 참조하여 본 발명의 실시예들을 설명하였지만, 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자는 본 발명이 그 기술적 사상이나 필수적인 특징을 변경하지 않고서 다른 구체적인 형태로 실시될 수 있다는 것을 이해할 수 있을 것이다. 그러므로 이상에서 기술한 실시예들은 모든 면에서 예시적인 것이며 한정적이 아닌 것으로 이해해야만 한다.Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art to which the present invention pertains can be implemented in other specific forms without changing the technical spirit or essential features of the present invention. you will be able to understand Therefore, the embodiments described above should be understood as illustrative in all respects and not limiting.

1, 1-1, 1-2: 이산화탄소 액화장치
10: 이산화탄소공급라인 11: 보조열교환기
20: 열교환기 30: 팽창밸브
40: 기액분리기 41: 제1 배출관
42: 제2 배출관 43: 벤트관
50: 연료공급라인 60a, 60b: 가열유닛
70: 냉매순환라인 71: 히터
80: 압축유닛 81: 압축기
82: 냉각기 90: 보조압축유닛
91: 보조압축기 92: 보조냉각기
100: 저장탱크
TK: 연료탱크 EG: 연소기관1, 1-1, 1-2: CO2 liquefier
10: carbon dioxide supply line 11: auxiliary heat exchanger
20: heat exchanger 30: expansion valve
40: gas-liquid separator 41: first discharge pipe
42: second discharge pipe 43: vent pipe
50: fuel supply line 60a, 60b: heating unit
70: refrigerant circulation line 71: heater
80: compression unit 81: compressor
82: cooler 90: auxiliary compression unit
91: auxiliary compressor 92: auxiliary cooler
100: storage tank
TK: fuel tank EG: combustion engine

Claims (8)

선박에서 발생된 이산화탄소를 공급받는 이산화탄소공급라인;
상기 이산화탄소공급라인 상에 설치되며 이산화탄소를 냉매와 열교환하여 냉각시키는 열교환기;
상기 열교환기 후단의 상기 이산화탄소공급라인 상에 설치되어 이산화탄소를 감압하는 팽창밸브;
상기 팽창밸브 후단의 상기 이산화탄소공급라인 상에 설치되어 액상의 이산화탄소와 기상의 이산화탄소를 분리하는 기액분리기;
연료탱크로부터 공급받은 액화천연가스를 가압하고 가열하여 연소기관으로 공급하는 연료공급라인;
상기 연료공급라인 상에 설치되며, 상기 액화천연가스를 상기 냉매와 열교환하여 기화시키는 가열유닛, 및
폐루프 독립 사이클을 구성하여 상기 냉매가 순환하며, 상기 열교환기와 상기 가열유닛을 경유하는 냉매순환라인을 포함하는 이산화탄소 액화장치.A carbon dioxide supply line for receiving carbon dioxide generated in the ship;
a heat exchanger installed on the carbon dioxide supply line and cooling carbon dioxide by exchanging heat with a refrigerant;
an expansion valve installed on the carbon dioxide supply line at the rear end of the heat exchanger to reduce carbon dioxide;
a gas-liquid separator installed on the carbon dioxide supply line at the rear end of the expansion valve to separate liquid carbon dioxide from gaseous carbon dioxide;
A fuel supply line for pressurizing and heating the liquefied natural gas supplied from the fuel tank and supplying it to the combustion engine;
A heating unit installed on the fuel supply line and vaporizing the liquefied natural gas by heat exchange with the refrigerant; and
A carbon dioxide liquefaction apparatus comprising a refrigerant circulation line through which the refrigerant circulates by configuring a closed loop independent cycle and passing through the heat exchanger and the heating unit. 제1 항에 있어서,
상기 열교환기 전단의 상기 이산화탄소공급라인 상에 설치되어 이산화탄소를 가압하는 압축기와,
상기 압축기 후단에 설치되어 가압된 이산화탄소를 냉각하는 냉각기를 포함하는 적어도 하나의 압축유닛을 더 포함하는 이산화탄소 액화장치.According to claim 1,
A compressor installed on the carbon dioxide supply line in front of the heat exchanger to pressurize carbon dioxide;
The carbon dioxide liquefaction device further comprises at least one compression unit including a cooler installed at a rear end of the compressor to cool the pressurized carbon dioxide. 제2 항에 있어서,
상기 가열유닛 전단의 상기 냉매순환라인 상에 설치되어 상기 가열유닛으로 공급되는 상기 냉매를 가열하는 히터를 더 포함하는 이산화탄소 액화장치.According to claim 2,
and a heater installed on the refrigerant circulation line in front of the heating unit to heat the refrigerant supplied to the heating unit. 제3 항에 있어서,
상기 기액분리기에서 분리된 상기 액상의 이산화탄소를 저장탱크로 공급하는 제1 배출관과,
상기 기액분리기에서 분리된 상기 기상의 이산화탄소를 배출하는 제2 배출관을 더 포함하는 이산화탄소 액화장치.According to claim 3,
A first discharge pipe for supplying the liquid carbon dioxide separated in the gas-liquid separator to a storage tank;
The carbon dioxide liquefaction device further comprises a second discharge pipe for discharging the gaseous carbon dioxide separated by the gas-liquid separator. 제4 항에 있어서,
상기 제2 배출관은 상기 압축유닛 전단의 상기 이산화탄소공급라인 상에 연결되고,
상기 제2 배출관 상에 설치되어 상기 기상의 이산화탄소를 가압하고 냉각하는 보조압축유닛을 더 포함하는 이산화탄소 액화장치.According to claim 4,
The second discharge pipe is connected to the carbon dioxide supply line at the front of the compression unit,
The carbon dioxide liquefaction device further comprises an auxiliary compression unit installed on the second discharge pipe to pressurize and cool the gaseous carbon dioxide. 제5 항에 있어서,
상기 보조압축유닛 전단의 상기 제2 배출관에서 분기되어 상기 기상의 이산화탄소를 외부로 방출하는 벤트관을 더 포함하는 이산화탄소 액화장치.According to claim 5,
The carbon dioxide liquefaction apparatus further comprises a vent pipe branched from the second discharge pipe at the front end of the auxiliary compression unit to discharge the gaseous carbon dioxide to the outside. 제5 항에 있어서,
상기 열교환기와 상기 팽창밸브 사이의 상기 이산화탄소공급라인 상에 설치되어, 상기 팽창밸브로 공급되는 이산화탄소와 상기 보조압축유닛으로 공급되는 상기 기상의 이산화탄소를 열교환하는 보조열교환기를 더 포함하는 이산화탄소 액화장치.According to claim 5,
and an auxiliary heat exchanger installed on the carbon dioxide supply line between the heat exchanger and the expansion valve to exchange heat between the carbon dioxide supplied to the expansion valve and the gaseous carbon dioxide supplied to the auxiliary compression unit. 제7 항에 있어서,
상기 보조열교환기와 상기 보조압축유닛 사이의 상기 제2 배출관에서 분기되어 상기 기상의 이산화탄소를 외부로 방출하는 벤트관을 더 포함하는 이산화탄소 액화장치.According to claim 7,
The carbon dioxide liquefaction device further comprises a vent pipe branched from the second discharge pipe between the auxiliary heat exchanger and the auxiliary compression unit to discharge the gaseous carbon dioxide to the outside.
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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101378995B1 (en) 2012-03-22 2014-04-02 삼성중공업 주식회사 Carbon Dioxide Handling System And Method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101378995B1 (en) 2012-03-22 2014-04-02 삼성중공업 주식회사 Carbon Dioxide Handling System And Method

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