KR102631166B1 - Fuel supply providing system used in ship - Google Patents

Fuel supply providing system used in ship Download PDF

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KR102631166B1
KR102631166B1 KR1020190162458A KR20190162458A KR102631166B1 KR 102631166 B1 KR102631166 B1 KR 102631166B1 KR 1020190162458 A KR1020190162458 A KR 1020190162458A KR 20190162458 A KR20190162458 A KR 20190162458A KR 102631166 B1 KR102631166 B1 KR 102631166B1
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gas
line
boil
storage tank
liquefied gas
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KR1020190162458A
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Korean (ko)
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KR20210073618A (en
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이원두
최성훈
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삼성중공업 주식회사
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    • 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
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0245—High pressure fuel supply systems; Rails; Pumps; Arrangement of valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/06—Apparatus for de-liquefying, e.g. by heating
    • 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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • 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
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0171—Arrangement
    • F17C2227/0185—Arrangement comprising several pumps or compressors
    • 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/01—Purifying the fluid
    • F17C2265/015—Purifying the fluid by separating
    • F17C2265/017—Purifying the fluid by separating different phases of a same 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/031—Treating the boil-off by discharge
    • 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
    • F17C2265/05—Regasification
    • 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
    • F17C2265/06—Fluid distribution
    • F17C2265/066—Fluid distribution for feeding engines for propulsion
    • 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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T70/00—Maritime or waterways transport
    • Y02T70/50—Measures to reduce greenhouse gas emissions related to the propulsion system
    • Y02T70/5218—Less carbon-intensive fuels, e.g. natural gas, biofuels

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Ocean & Marine Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

선박용 연료가스공급시스템을 개시한다. 본 발명의 실시 예에 따른 선박용 연료가스공급시스템은 액화가스 및 액화가스의 증발가스를 저장하는 저장탱크로부터 증발가스를 공급받아 압축하는 압축부; 압축된 증발가스를 냉매와 열교환하여 액화시키는 열교환부; 저장탱크, 압축부 및 열교환부를 연결하는 재액화라인; 저장탱크로부터 공급받은 액화가스를 수요처로 공급하는 액화가스공급라인; 및 재액화라인의 압축부와 열교환부 사이로부터 분기되어 액화가스공급라인과 연결되며, 압축부에 의해 압축된 증발가스 중 일부를 액화가스공급라인으로 합류시키는 합류라인;을 포함한다.Launch of fuel gas supply system for ships. A marine fuel gas supply system according to an embodiment of the present invention includes a compression unit that receives boil-off gas from a storage tank that stores liquefied gas and boil-off gas of the liquefied gas and compresses it; A heat exchange unit that liquefies the compressed boil-off gas by exchanging heat with the refrigerant; A reliquefaction line connecting the storage tank, compression section, and heat exchange section; A liquefied gas supply line that supplies liquefied gas supplied from a storage tank to the consumer; and a confluence line that branches off between the compression section and the heat exchange section of the re-liquefaction line and is connected to the liquefied gas supply line, and merges some of the boil-off gas compressed by the compression section into the liquefied gas supply line.

Description

선박용 연료가스공급시스템{FUEL SUPPLY PROVIDING SYSTEM USED IN SHIP}Fuel gas supply system for ships {FUEL SUPPLY PROVIDING SYSTEM USED IN SHIP}

본 발명은 선박용 연료가스공급시스템에 관한 것이다.The present invention relates to a fuel gas supply system for ships.

온실가스 및 각종 대기오염 물질의 배출에 대한 국제해사기구(IMO)의 규제가 강화됨에 따라 조선 및 해운업계에서는 기존 연료인 중유, 디젤유의 이용을 대신하여, 청정 에너지원인 천연가스를 선박의 연료가스로 이용하는 경우가 많아지고 있다.As the International Maritime Organization (IMO)'s regulations on the emission of greenhouse gases and various air pollutants are strengthened, the shipbuilding and shipping industry is using natural gas, a clean energy source, as fuel gas for ships instead of using existing fuels such as heavy oil and diesel oil. It is increasingly being used.

연료가스 중에서 널리 이용되고 있는 천연가스(Natural Gas)는 메탄(Methane)을 주성분으로 하며, 통상적으로 그 부피를 1/600로 줄인 액화가스(Liquefied Gas) 상태로 변화되어 저장 및 운반되고 있다.Natural gas, which is widely used among fuel gases, contains methane as its main ingredient, and is usually stored and transported in a liquefied gas state with its volume reduced to 1/600.

액화가스를 운반하는 선박은 액화가스를 저장할 수 있도록 단열 처리된 저장탱크를 구비한다. 또, 이러한 선박은 저장탱크에서 자연적으로 발생하는 증발가스(Boiled Off Gas) 또는 저장탱크의 액화가스를 기화시켜 엔진의 연료로 공급하는 연료가스공급시스템을 마련할 수 있다. 선박의 엔진에는 DFDE(Dual Fuel Disel Electric) 엔진 등과 같은 저압(약 5~8bar)의 분사엔진, ME-GI 엔진(Man B&W 사의 Gas Injection 엔진)과 같은 고압(약 150~700bar)의 분사엔진 및 중압(약 16~18bar)의 연료가스로 연소가 가능한 중압가스 분사엔진이 이용될 수 있다.Ships that transport liquefied gas are equipped with insulated storage tanks to store the liquefied gas. In addition, these ships can be equipped with a fuel gas supply system that vaporizes boiled off gas (boiled off gas) naturally occurring in the storage tank or liquefied gas in the storage tank and supplies it as fuel for the engine. Ship engines include low-pressure (approximately 5 to 8 bar) injection engines such as DFDE (Dual Fuel Disel Electric) engines, high-pressure (approximately 150 to 700 bar) injection engines such as ME-GI engines (Man B&W's Gas Injection Engine), and A medium-pressure gas injection engine capable of combustion with medium-pressure (approximately 16 to 18 bar) fuel gas can be used.

상술한 연료가스공급시스템은 예컨대 ME-GI 엔진이 필요로 하는 연료 소모량보다 많은 증발가스가 저장탱크 내에 존재하는 경우, 저장탱크 내부의 증발가스를 재액화시켜 저장하기 위한 재액화 수단들을 포함할 수 있다.The above-mentioned fuel gas supply system may include re-liquefaction means for re-liquefying and storing the boil-off gas inside the storage tank, for example, when more boil-off gas exists in the storage tank than the fuel consumption required by the ME-GI engine. there is.

구체적으로 재액화 수단들은 저장탱크 내부의 증발가스를 가압하고, 가압된 증발가스를 냉매와의 열교환에 의해 냉각시키고, 냉각된 증발가스를 감압시키는 구성을 포함할 수 있다.Specifically, the reliquefaction means may include a configuration that pressurizes the boil-off gas inside the storage tank, cools the pressurized boil-off gas by heat exchange with the refrigerant, and depressurizes the cooled boil-off gas.

그러나, 이러한 재액화 과정 중 가압에 의해 온도가 올라간 증발가스를 냉매를 통해 냉각시켜야 하므로, 냉매를 순환 공급하는 냉매공급장치의 에너지 소모량이 많이 필요하고, 이는 전체 시스템의 효율성을 떨어뜨릴 수 있다.However, during this reliquefaction process, the evaporated gas whose temperature has risen due to pressurization must be cooled through a refrigerant, so a large amount of energy is consumed by the refrigerant supply device that circulates the refrigerant, which can reduce the efficiency of the entire system.

이와 관련된 기술로서 한국공개특허 제10-2012-0103409호(2012.09.19. 공개)를 참조하기 바란다.For technology related to this, please refer to Korean Patent Publication No. 10-2012-0103409 (published on September 19, 2012).

한국공개특허 제10-2012-0103409호(2012.09.19. 공개)Korean Patent Publication No. 10-2012-0103409 (published on September 19, 2012)

본 발명의 실시 예는 재액화할 증발가스의 양을 줄이고, 증발가스 재액화 및 연료공급의 효율성을 함께 향상시킬 수 있는 선박용 연료가스공급시스템을 제공하고자 한다.An embodiment of the present invention seeks to provide a fuel gas supply system for ships that can reduce the amount of boil-off gas to be re-liquefied and improve the efficiency of boil-off gas re-liquefaction and fuel supply.

본 발명의 일 측면에 따르면, 액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크로부터 상기 증발가스를 공급받아 압축하는 압축부; 상기 압축된 증발가스를 냉매와 열교환하여 액화시키는 열교환부; 상기 저장탱크, 압축부 및 열교환부를 연결하는 재액화라인; 상기 저장탱크로부터 공급받은 액화가스를 수요처로 공급하는 액화가스공급라인; 및 상기 재액화라인의 상기 압축부와 상기 열교환부 사이로부터 분기되어 상기 액화가스공급라인과 연결되며, 상기 압축부에 의해 압축된 증발가스 중 일부를 상기 액화가스공급라인으로 합류시키는 합류라인;을 포함하는 선박용 연료가스공급시스템이 제공될 수 있다.According to one aspect of the present invention, a compression unit that receives the boil-off gas from a storage tank that stores the liquefied gas and the boil-off gas of the liquefied gas and compresses it; A heat exchange unit that liquefies the compressed boil-off gas by exchanging heat with a refrigerant; A reliquefaction line connecting the storage tank, compression unit, and heat exchange unit; A liquefied gas supply line that supplies the liquefied gas supplied from the storage tank to a consumer; And a confluence line that branches off between the compression section and the heat exchange section of the re-liquefaction line and is connected to the liquefied gas supply line, and merges some of the boil-off gas compressed by the compression section into the liquefied gas supply line. A fuel gas supply system for ships including:

상기 액화가스공급라인에 마련되고, 상기 저장탱크로부터 공급받은 액화가스와 상기 합류라인을 통해 공급받은 압축된 증발가스의 혼합물을 상기 수요처의 요구조건에 맞게 압축시키는 고압펌프와, 상기 압축된 혼합물을 기화시켜 상기 수요처로 공급하는 기화기를 더 포함할 수 있다.A high-pressure pump provided in the liquefied gas supply line and compressing the mixture of the liquefied gas supplied from the storage tank and the compressed boil-off gas supplied through the confluence line to meet the requirements of the customer, and the compressed mixture It may further include a vaporizer that vaporizes and supplies it to the consumer.

상기 저장탱크 내부에 마련되며, 상기 저장탱크에 저장된 액화가스를 설정된 압력으로 펌핑하여 상기 액화가스공급라인을 통해 공급하는 내부펌프와, 상기 내부펌프에 의해 공급된 액화가스를 상기 압축부를 통과한 유체의 압력과 동일한 압력으로 압축하여 상기 고압펌프 쪽으로 공급하는 압축펌프를 더 포함할 수 있다.An internal pump provided inside the storage tank, which pumps the liquefied gas stored in the storage tank at a set pressure and supplies it through the liquefied gas supply line, and a fluid that passes the compression unit through the liquefied gas supplied by the internal pump. It may further include a compression pump that compresses the pressure to the same pressure and supplies it to the high pressure pump.

상기 압축부는 교대로 배치된 하나 이상의 압축기와 냉각기를 포함하고, 상기 열교환부를 통과한 유체를 기체성분과 액체성분으로 분리시키는 기액분리기와, 상기 분리된 액체성분을 상기 압축기에 의해 압축된 증발가스와 열교환되도록 상기 냉각기로 공급하는 액체성분공급라인과, 상기 액체성분공급라인으로부터 분기되어 상기 냉각기와 연결되며, 상기 분리된 액체성분 중 일부를 공급받아 감압시키는 감압밸브를 마련한 감압라인과, 상기 냉각기로부터 상기 감압된 액체성분과 상기 열교환된 액체성분의 혼합물을 공급받아 상기 저장탱크로 공급하는 회수라인을 더 포함할 수 있다.The compression unit includes one or more compressors and coolers arranged alternately, a gas-liquid separator that separates the fluid passing through the heat exchange unit into a gas component and a liquid component, and the separated liquid component with the boil-off gas compressed by the compressor. A liquid component supply line supplied to the cooler for heat exchange, a pressure reduction line branched from the liquid component supply line and connected to the cooler, and provided with a pressure reducing valve to receive some of the separated liquid components and reduce the pressure, and from the cooler. It may further include a recovery line that receives the mixture of the depressurized liquid component and the heat-exchanged liquid component and supplies it to the storage tank.

상기 분리된 기체성분을 상기 재액화라인의 압축부 전단으로 공급하는 기체성분공급라인과, 상기 재액화라인의 압축부 전단에 마련되며, 상기 저장탱크로부터 공급된 증발가스와 상기 기체성분공급라인을 통해 공급된 기체성분을 혼합하여 저장하며, 상기 혼합된 유체 속에 함유된 액체성분의 불순물을 자중에 의해 제거하는 녹아웃드럼을 더 포함할 수 있다.A gas component supply line that supplies the separated gas component to the front end of the compression section of the re-liquefaction line, and a gas component supply line provided at the front end of the compression section of the re-liquefaction line, the boil-off gas supplied from the storage tank and the gas component supply line. It may further include a knockout drum that mixes and stores the gas components supplied through the fluid and removes impurities of the liquid component contained in the mixed fluid by its own weight.

본 발명의 실시 예에 따른 선박용 연료가스공급시스템은 재액화할 증발가스의 양을 줄이고, 증발가스 재액화 및 연료공급의 효율성을 함께 향상시킬 수 있다.The marine fuel gas supply system according to an embodiment of the present invention can reduce the amount of boil-off gas to be re-liquefied and improve the efficiency of boil-off gas re-liquefaction and fuel supply.

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 will be clearly understood by those skilled in the art from the description of the claims.

도 1은 본 발명의 실시 예에 따른 선박용 연료가스공급시스템을 나타낸다.Figure 1 shows a fuel gas supply system for ships according to an embodiment of the present invention.

이하에서는 본 발명의 실시 예들을 첨부 도면을 참조하여 상세히 설명한다. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명의 실시 예에 따른 선박용 연료가스공급시스템을 나타낸다.Figure 1 shows a fuel gas supply system for ships according to an embodiment of the present invention.

도 1을 참조하면, 본 발명의 실시 예에 따른 선박용 연료가스공급시스템(100)은 액화가스 및 액화가스의 증발가스를 저장하는 저장탱크(101)로부터 증발가스를 공급받아 압축하는 압축부(110)와, 압축부(110)에 의해 압축된 증발가스를 냉매와 열교환하여 액화시키는 열교환부(120)와, 저장탱크(101), 압축부(110) 및 열교환부(120)를 연결하는 재액화라인(L1)과, 저장탱크(101)로부터 공급받은 액화가스를 수요처(E)로 공급하는 액화가스공급라인(L2)과, 재액화라인(L1)의 압축부(110)와 열교환부(120) 사이로부터 분기되어 액화가스공급라인(L2)과 연결되며, 압축부(110)에 의해 압축된 증발가스 중 일부를 액화가스공급라인(L2)으로 합류시키는 합류라인(L3)을 포함한다.Referring to Figure 1, the marine fuel gas supply system 100 according to an embodiment of the present invention includes a compression unit 110 that receives boil-off gas from a storage tank 101 that stores liquefied gas and boil-off gas of the liquefied gas and compresses it. ) and the heat exchange unit 120, which liquefies the boil-off gas compressed by the compression unit 110 by exchanging heat with the refrigerant, and re-liquefaction connecting the storage tank 101, the compression unit 110, and the heat exchange unit 120. A line (L1), a liquefied gas supply line (L2) that supplies the liquefied gas supplied from the storage tank 101 to the consumer (E), a compression unit 110 and a heat exchange unit 120 of the re-liquefaction line (L1). ) is branched from and connected to the liquefied gas supply line (L2), and includes a confluence line (L3) that merges some of the boil-off gas compressed by the compression unit 110 into the liquefied gas supply line (L2).

또, 선박용 연료가스공급시스템(100)은 액화가스공급라인(L2)에 마련되고, 저장탱크(101)로부터 공급받은 액화가스와 합류라인(L3)을 통해 공급받은 압축된 증발가스의 혼합물을 수요처(E)의 요구조건에 맞게 압축시키는 고압펌프(P1)와, 고압펌프(P1)에 의해 압축된 해당 혼합물을 기화시켜 수요처(E)로 공급하는 기화기(130)를 포함한다.In addition, the marine fuel gas supply system 100 is provided in the liquefied gas supply line (L2), and supplies a mixture of the liquefied gas supplied from the storage tank 101 and the compressed boil-off gas supplied through the confluence line (L3) to the user. It includes a high-pressure pump (P1) that compresses to meet the requirements of (E), and a vaporizer (130) that vaporizes the mixture compressed by the high-pressure pump (P1) and supplies it to the consumer (E).

또, 선박용 연료가스공급시스템(100)은 저장탱크(101) 내부에 마련되며, 액화가스를 설정된 압력으로 펌핑하여 액화가스공급라인(L2)을 통해 공급하는 내부펌프(P2)와, 액화가스공급라인(L2)의 고압펌프(P1) 전단에 마련되며, 내부펌프(P2)에 의해 공급된 액화가스를 압축부(110)를 통과한 유체의 압력과 동일한 압력으로 압축하여 고압펌프(P1) 쪽으로 공급하는 압축펌프(P3)를 포함할 수 있다.In addition, the marine fuel gas supply system 100 is provided inside the storage tank 101, and includes an internal pump (P2) that pumps liquefied gas at a set pressure and supplies it through the liquefied gas supply line (L2), and a liquefied gas supply system. It is provided in front of the high pressure pump (P1) in the line (L2), and compresses the liquefied gas supplied by the internal pump (P2) to the same pressure as the pressure of the fluid that passed through the compression unit (110) and pumps it toward the high pressure pump (P1). It may include a compression pump (P3) that supplies it.

상술한 압축부(110)는 교대로 배치된 하나 이상의 압축기(112)와 냉각기(114)를 포함한다. 그리고, 선박용 연료가스공급시스템(100)은 열교환부(120)를 통과한 유체를 기체성분과 액체성분으로 분리시키는 기액분리기(140)와, 기액분리기(140)에 의해 분리된 액체성분을 압축기(112)에 의해 압축된 증발가스와 열교환되도록 냉각기(114)로 공급하는 액체성분공급라인(L4)과, 액체성분공급라인(L4)으로부터 분기되어 냉각기(114)와 연결되며, 기액분리기(140)에 의해 분리된 액체성분 중 일부를 공급받아 감압시키는 감압밸브(117)를 마련한 감압라인(L5)과, 냉각기(114)로부터 감압밸브(117)에 의해 감압된 액체성분과 압축된 증발가스와 열교환된 액체성분의 혼합물을 공급받아 저장탱크(101)로 보내는 회수라인(L6)을 포함할 수 있다.The above-described compression unit 110 includes one or more compressors 112 and coolers 114 arranged alternately. In addition, the marine fuel gas supply system 100 includes a gas-liquid separator 140 that separates the fluid that has passed through the heat exchanger 120 into a gas component and a liquid component, and a compressor ( A liquid component supply line (L4) supplied to the cooler 114 to exchange heat with the boil-off gas compressed by 112), branched from the liquid component supply line (L4) and connected to the cooler 114, and a gas-liquid separator 140. A pressure reducing line (L5) equipped with a pressure reducing valve (117) that receives and reduces the pressure of some of the separated liquid components, and heat exchanges between the liquid component and the compressed boil-off gas decompressed by the pressure reducing valve (117) from the cooler (114). It may include a recovery line (L6) that receives the mixture of liquid components and sends it to the storage tank (101).

또, 선박용 연료가스공급시스템(100)은 기액분리기(140)에 의해 분리된 기체성분을 재액화라인(L1)의 압축부(110) 전단으로 공급하는 기체성분공급라인(L7)과, 재액화라인(L1)의 압축부(110) 전단에 마련되며, 재액화라인(L1)을 통해 저장탱크(101)로부터 공급된 증발가스와 기체성분공급라(L6)인을 통해 공급된 기체성분을 혼합하여 저장하며, 해당 혼합된 유체 속에 함유된 액체성분의 불순물을 자중에 의해 제거하는 녹아웃드럼(150, Knock out-drum)을 포함할 수 있다.In addition, the marine fuel gas supply system 100 includes a gas component supply line (L7) that supplies the gas components separated by the gas-liquid separator 140 to the front of the compression section 110 of the re-liquefaction line (L1), and a re-liquefaction line (L7). It is provided in front of the compression section 110 of the line (L1), and mixes the boil-off gas supplied from the storage tank 101 through the re-liquefaction line (L1) with the gas component supplied through the gas component supply line (L6). and stored, and may include a knock-out drum (150) that removes impurities of the liquid component contained in the mixed fluid by its own weight.

본 발명의 실시 예에 따른 선박용 연료가스공급시스템(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. The marine fuel gas supply system 100 according to an embodiment of the present invention is used for various liquefied fuel carriers, liquefied fuel RV (Regasification Vessel), container ships, general merchant ships, LNG FPSO (Floating, Production, Storage and Off-loading), and LNG. It can be applied to ships including FSRU (Floating Storage and Regasification Unit).

이하, 각 구성요소에 대해서 구체적으로 설명한다.Hereinafter, each component will be described in detail.

상술한 저장탱크(101)는 단열상태를 유지하면서 연료를 액화상태로 저장하는 멤브레인형 탱크, SPB형 탱크 등을 포함할 수 있다. 저장탱크(101)에 저장된 액화가스는 액화상태로 저장할 수 있는 LNG(Liquefied Natural Gas), LPG(Liquefied Petroleum Gas), DME(Dimethylether), 에탄(Ethane) 중 어느 하나일 수 있으나 이에 한정되는 것은 아니다. 이하에서는 저장탱크(101)에 에탄이 저장된 것을 예로 들어 설명한다.The storage tank 101 described above may include a membrane-type tank, an SPB-type tank, etc., which store fuel in a liquefied state while maintaining an insulated state. The liquefied gas stored in the storage tank 101 may be any one of LNG (Liquefied Natural Gas), LPG (Liquefied Petroleum Gas), DME (Dimethylether), and ethane that can be stored in a liquefied state, but is not limited thereto. . Hereinafter, ethane stored in the storage tank 101 will be described as an example.

압축부(110)는 재액화라인(L1)을 통해 저장탱크(101)로부터 증발가스를 공급받아 압축하며, 교대로 배치된 하나 이상의 압축기(112; 112a~112c)와 냉각기(114; 114a~114c)를 포함할 수 있다. 본 발명의 실시 예에서는 3단으로 마련된 다단방식의 압축부(110)를 예로 들어 설명한다. 예컨대, 각각의 압축기(112a~112c)와 냉각기(114a~114c)를 통과한 증발가스의 최종 압력과 온도는 30barA, 40℃일 수 있다. 여기서, 제2냉각기(114b)와 제3냉각기(114c)는 각각 글리콜워터와 해수를 이용하여 압축된 증발가스를 냉각시킬 수 있다. 제1냉각기(114a)는 관련된 구성과 함께 후술하기로 한다.The compression unit 110 receives boil-off gas from the storage tank 101 through the reliquefaction line (L1) and compresses it, and one or more compressors (112; 112a to 112c) and coolers (114; 114a to 114c) are arranged alternately. ) may include. In an embodiment of the present invention, the multi-stage compression unit 110 provided in three stages will be described as an example. For example, the final pressure and temperature of the boil-off gas passing through each compressor (112a to 112c) and cooler (114a to 114c) may be 30 barA and 40°C. Here, the second cooler 114b and the third cooler 114c can cool the compressed boil-off gas using glycol water and seawater, respectively. The first cooler 114a will be described later along with its related configuration.

열교환부(120)는 냉매순환라인(L10)을 통해 순환 공급되는 냉매와 압축부(110)에 의해 압축된 증발가스 간 열교환을 수행한다. The heat exchange unit 120 performs heat exchange between the refrigerant circulated and supplied through the refrigerant circulation line (L10) and the boil-off gas compressed by the compression unit 110.

냉매는 냉매공급장치(125)로부터 공급될 수 있고, 열교환된 냉매는 냉매공급장치(125)에 의해 설정된 온도로 냉각된 후, 냉매순환라인(L10)을 통해 순환 공급될 수 있다. 따라서, 냉매를 설정된 온도로 맞추어 순환 공급하기 위해서 냉매공급장치(125)에 의해 에너지가 소비된다. 이러한 에너지 소모량을 줄이고 전체 시스템 효율을 향상시키기 위해, 본 발명의 실시 예를 통해 재액화할 증발가스의 양을 줄일 수 있다.The refrigerant may be supplied from the refrigerant supply device 125, and the heat-exchanged refrigerant may be cooled to a temperature set by the refrigerant supply device 125 and then circulated and supplied through the refrigerant circulation line (L10). Therefore, energy is consumed by the refrigerant supply device 125 to circulate and supply the refrigerant at the set temperature. In order to reduce this energy consumption and improve overall system efficiency, the amount of boil-off gas to be re-liquefied can be reduced through embodiments of the present invention.

이를 위해, 재액화라인(L1)의 압축부(110)와 열교환부(120) 사이로부터 분기된 합류라인(L3)은, 액화가스공급라인(L2)의 고압펌프(P1) 전단으로 연결되며, 압축부(110)에 의해 압축된 증발가스 중 일부를 액화가스공급라인(L2)으로 합류시켜 수요처(E)의 연료로 공급되도록 한다.For this purpose, the confluence line (L3) branched from the compression section 110 and the heat exchange section 120 of the re-liquefaction line (L1) is connected to the front end of the high-pressure pump (P1) of the liquefied gas supply line (L2), Some of the boil-off gas compressed by the compression unit 110 is joined to the liquefied gas supply line (L2) and supplied as fuel to the consumer (E).

이를 통해 압축부(110)에 의해 가압되어 온도가 올라간 증발가스에 대한 재액화 양을 줄일 수 있다. 또, 열교환부(120)로 유입된 압축된 증발가스를 액화시키기 위해, 냉매의 냉열을 일정 온도로 유지시키면서 열교환부(120)로 순환 공급하는 냉매공급장치(125)의 에너지 소모량이 줄어들게 되며, 이는 전체 시스템의 효율성을 향상시킬 수 있다.Through this, it is possible to reduce the amount of re-liquefaction of the boil-off gas whose temperature has risen by being pressurized by the compression unit 110. In addition, in order to liquefy the compressed boil-off gas flowing into the heat exchange unit 120, the energy consumption of the refrigerant supply device 125, which circulates and supplies the cold heat of the refrigerant to the heat exchange unit 120 while maintaining a constant temperature, is reduced. This can improve the efficiency of the overall system.

액화가스공급라인(L2)에 마련된 고압펌프(P1)는 합류라인(L3)을 통해 공급된 압축된 증발가스와 저장탱크(101)로부터 공급된 액화가스의 혼합물을 수요처(E)의 요구조건에 맞게 압축시킨다. 예컨대, 고압펌프(P1)를 통과한 유체는 380barA, -70℃의 상태일 수 있다.The high-pressure pump (P1) provided in the liquefied gas supply line (L2) supplies a mixture of the compressed boil-off gas supplied through the confluence line (L3) and the liquefied gas supplied from the storage tank (101) according to the requirements of the consumer (E). Compress accordingly. For example, the fluid passing through the high pressure pump (P1) may be at 380 barA and -70°C.

액화가스공급라인(L2)과 합류라인(L3)의 합류 지점 전단에는 압축펌프(P3)가 마련될 수 있다. 그리고, 저장탱크(101) 내부에는 내부펌프(P2)가 마련될 수 있다.A compression pump (P3) may be provided in front of the confluence point of the liquefied gas supply line (L2) and the confluence line (L3). Additionally, an internal pump (P2) may be provided inside the storage tank 101.

압축펌프(P3)는 상술한 압축부(110)를 통과한 유체(증발가스)의 압력과 동일한 압력으로 저장탱크(101)로부터 공급된 액화가스를 가압할 수 있다. 예컨대 압축펌프(P3)에 의해 가압된 액화가스는 압축부(110)를 통과한 유체의 압력과 동일한 30barA의 압력을 가질 수 있고, 이때의 온도는 대략 -91℃일 수 있다. The compression pump (P3) can pressurize the liquefied gas supplied from the storage tank 101 at the same pressure as the pressure of the fluid (evaporated gas) that passed through the compression unit 110 described above. For example, the liquefied gas pressurized by the compression pump P3 may have a pressure of 30 barA, which is the same as the pressure of the fluid passing through the compression unit 110, and the temperature at this time may be approximately -91°C.

합류라인(L3)을 통해 공급된 압축된 증발가스는 이미 압축부(110)에 의해 가압된 상태이므로, 그 온도가 저장탱크(101) 내의 액화가스(예컨대 에탄)처럼 낮지 않아도 저장탱크(101)로부터 공급된 액화가스와 혼합되어 쉽게 액체상태로 상변환된다.Since the compressed boil-off gas supplied through the confluence line (L3) is already pressurized by the compression unit 110, even if its temperature is not as low as the liquefied gas (e.g. ethane) in the storage tank 101, the storage tank 101 It is mixed with the liquefied gas supplied from and is easily converted into a liquid state.

저장탱크(101) 내부에 마련된 내부펌프(P2)가 압축부(110)를 통과한 유체의 압력과 동일한 압력으로 액화가스를 가압하여 공급할 수 있을 경우에는 압축펌프(P3)가 생략 가능하다.If the internal pump (P2) provided inside the storage tank (101) can pressurize and supply liquefied gas at the same pressure as the pressure of the fluid that passed through the compression unit (110), the compression pump (P3) can be omitted.

기화기(130)는 고압펌프(P1)에 의해 압축된 저장탱크(101)로부터 공급받은 액화가스와 합류라인(L3)을 통해 공급받은 압축된 증발가스의 혼합물을 기화시켜 수요처(E)로 공급하며, 기화기(130)를 통과한 유체는 380barA, -45℃의 상태일 수 있다. The vaporizer 130 vaporizes the mixture of the liquefied gas supplied from the storage tank 101 compressed by the high pressure pump (P1) and the compressed boil-off gas supplied through the confluence line (L3) and supplies it to the consumer (E). , the fluid passing through the vaporizer 130 may be at 380 barA and -45°C.

수요처(E)는 예컨대 에탄을 연료로 사용하는 ME-LGI 엔진 등을 포함할 수 있다.The demand source (E) may include, for example, a ME-LGI engine that uses ethane as fuel.

한편, 기액분리기(140)는 상술한 열교환부(120)에 의해 냉매와 열교환되어 액화된 유체를 기체성분과 액체성분으로 분리시킨다. 여기서, 기액분리기(140)에 의해 분리된 액체성분은 액체성분공급라인(L4)을 통해 제1압축기(112a)에 의해 압축된 증발가스와 열교환되도록 제1냉각기(114a)에 포함된 냉각열교환기(115)로 공급된다. 본 발명의 실시 예에서는 기액분리기(140)에 의해 분리된 액체성분이 제1냉각기(114a)에 공급되는 것을 예로 들어 설명하지만, 다른 예에서는 제2냉각기(114b) 또는 제3냉각기(114c)에 공급되어, 압축기(112)에 의해 압축된 증발가스를 냉각시키는 데에 사용될 수 있다.Meanwhile, the gas-liquid separator 140 separates the liquefied fluid into a gas component and a liquid component by exchanging heat with the refrigerant by the heat exchange unit 120 described above. Here, the liquid component separated by the gas-liquid separator 140 is a cooling heat exchanger included in the first cooler (114a) to exchange heat with the boil-off gas compressed by the first compressor (112a) through the liquid component supply line (L4). It is supplied as (115). In an embodiment of the present invention, the liquid component separated by the gas-liquid separator 140 is supplied to the first cooler (114a) as an example, but in other examples, it is supplied to the second cooler (114b) or the third cooler (114c). It can be supplied and used to cool the boil-off gas compressed by the compressor 112.

그리고, 액체성분공급라인(L4)으로부터 분기되어 제1냉각기(114a)와 연결된 감압라인(L5)을 통해 기액분리기(140)에 의해 분리된 액체성분 중 일부가 감압밸브(117)로 공급되어 감압된 후 제1냉각기(114a)로 유입된다.Then, some of the liquid components separated by the gas-liquid separator 140 are supplied to the pressure reducing valve 117 through the pressure reducing line (L5) branched from the liquid component supply line (L4) and connected to the first cooler (114a) to reduce the pressure. After that, it flows into the first cooler (114a).

상술한 열교환부(120)에 의해 냉매와 열교환되어 액화된 유체는 30barA, -36℃의 액체상태를 유지할 수 있으나, 이는 저장탱크(101)로 바로 저장될 경우, 기체상태로 변환될 수 있는 정도이기 때문에, 저장탱크(101)에 저장되어도 액체상태를 유지할 수 있도록 할 필요성이 있다.The liquefied fluid exchanged heat with the refrigerant by the heat exchanger 120 described above can maintain a liquid state at 30 barA and -36°C, but this is the extent to which it can be converted to a gaseous state when stored directly in the storage tank 101. Because of this, there is a need to maintain the liquid state even when stored in the storage tank 101.

이에, 본 발명의 실시 예에서는 기액분리기(140)에 의해 분리된 액체성분 중 일부를 감압라인(L5)을 통해 감압밸브(117)로 공급하여 3.5barA, -80℃로 변환시킨 후, 제1냉각기(114a)로 공급한다. 이를 통해 액체성분공급라인(L4)을 통해 냉각열교환기(115)로 공급되어 압축된 증발가스와 열교환된 기액분리기(140)에 의해 분리된 액체성분과 상술한 감압밸브(117)에 의해 감압된 액체성분의 혼합물이 29barA, -59℃의 상태로 변환되어 회수라인(L6)을 통해 저장탱크(101)에 액체상태로 저장될 수 있게 된다.Accordingly, in an embodiment of the present invention, some of the liquid components separated by the gas-liquid separator 140 are supplied to the pressure reducing valve 117 through the pressure reducing line (L5) and converted to 3.5 barA, -80°C, and then the first It is supplied to the cooler (114a). Through this, the liquid component separated by the gas-liquid separator 140 is supplied to the cooling heat exchanger 115 through the liquid component supply line (L4) and exchanges heat with the compressed boil-off gas, and the pressure is reduced by the pressure reducing valve 117 described above. The mixture of liquid components is converted to a state of 29 barA and -59°C and can be stored in a liquid state in the storage tank 101 through the recovery line (L6).

기체성분공급라인(L7)은 기액분리기(140)에 의해 분리된 기체성분을 재액화라인(L1)의 압축부(110) 전단으로 공급한다.The gas component supply line (L7) supplies the gas components separated by the gas-liquid separator (140) to the front of the compression section (110) of the reliquefaction line (L1).

이때, 재액화라인(L1)의 압축부(110) 전단에 마련된 녹아웃드럼(150)은 재액화라인(L1)을 통해 저장탱크(101)로부터 공급된 증발가스와 기체성분공급라(L6)인을 통해 공급된 기체성분을 혼합하여 저장하며, 혼합된 유체 속에 함유된 액체성분의 불순물을 자중에 의해 제거한다. 에탄을 화물로 저장하는 선박의 경우, 프로판이나 부탄과 같은 물질이 함유될 수 있다. 이때 강한 유동현상이 발생한 경우, 액체성분의 프로판이나 부탄과 같은 물질이 오일 방울 형태로 증발가스에 함유된 상태에서 압축부(110)로 흘러가 압축부(110)의 성능에 문제를 발생시킬 수 있다.At this time, the knockout drum 150 provided at the front of the compression section 110 of the re-liquefaction line (L1) is the boil-off gas supplied from the storage tank 101 through the re-liquefaction line (L1) and the gas component supply line (L6). The gas components supplied through are mixed and stored, and the impurities of the liquid components contained in the mixed fluid are removed by their own weight. For ships storing ethane as cargo, it may contain substances such as propane or butane. At this time, if a strong flow phenomenon occurs, liquid substances such as propane or butane may flow into the compression unit 110 while contained in the boil-off gas in the form of oil droplets, causing problems in the performance of the compression unit 110. .

이에, 본 발명의 실시 예에서는 녹아웃드럼(150)을 통해 오일 방울(Oil Droplet) 형태의 액체성분이 자중에 의해 정제될 수 있도록 하여, 증발가스에 딸려온 액체성분이 분리될 수 있도록 한다. 녹아웃드럼(150)에서 분리된 액체성분은 도시하지는 않았으나 저장탱크(101)로 회수될 수 있다.Accordingly, in an embodiment of the present invention, the liquid component in the form of an oil droplet can be purified by its own weight through the knockout drum 150, so that the liquid component accompanying the boil-off gas can be separated. Although not shown, the liquid component separated from the knockout drum 150 can be recovered into the storage tank 101.

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.In the above, specific embodiments are shown and described. However, the present invention is not limited to the above-described embodiments, and those skilled in the art can make various changes without departing from the gist of the technical idea of the invention as set forth in the claims below. You will be able to.

101: 저장탱크 110: 압축부
112: 압축기 114: 냉각기
117: 감압밸브 120: 열교환부
125: 냉매공급장치 130: 기화기
140: 기액분리기 150: 녹아웃드럼
L1: 재액화라인 L2: 액화가스공급라인
L3: 합류라인 L4: 액체성분공급라인
L5: 감압라인 L6: 회수라인
L7: 기체성분공급라인 P1: 고압펌프
P2: 내부펌프 P3: 압축펌프101: storage tank 110: compression unit
112: compressor 114: cooler
117: pressure reducing valve 120: heat exchange unit
125: Refrigerant supply device 130: Vaporizer
140: Gas-liquid separator 150: Knockout drum
L1: Re-liquefaction line L2: Liquefied gas supply line
L3: Confluence line L4: Liquid ingredient supply line
L5: Pressure reduction line L6: Recovery line
L7: Gas component supply line P1: High pressure pump
P2: Internal pump P3: Compression pump

Claims (5)

액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크로부터 상기 증발가스를 공급받아 압축하는 압축부;
상기 압축된 증발가스를 냉매와 열교환하여 액화시키는 열교환부;
상기 저장탱크, 압축부 및 열교환부를 연결하는 재액화라인;
상기 저장탱크로부터 공급받은 액화가스를 수요처로 공급하는 액화가스공급라인; 및
상기 재액화라인의 상기 압축부와 상기 열교환부 사이로부터 분기되어 상기 액화가스공급라인과 연결되며, 상기 압축부에 의해 압축된 증발가스 중 일부를 상기 액화가스공급라인으로 합류시켜 재액화 할 증발가스의 양을 줄이는 합류라인;을 포함하는 선박용 연료가스공급시스템.A compression unit that receives and compresses the boil-off gas from a storage tank that stores the liquefied gas and the boil-off gas of the liquefied gas;
A heat exchange unit that liquefies the compressed boil-off gas by exchanging heat with a refrigerant;
A reliquefaction line connecting the storage tank, compression unit, and heat exchange unit;
A liquefied gas supply line that supplies the liquefied gas supplied from the storage tank to a consumer; and
Boil-off gas is branched between the compression section and the heat exchange section of the re-liquefaction line and connected to the liquefied gas supply line, and is to be re-liquefied by joining some of the boil-off gas compressed by the compression section to the liquefied gas supply line. A marine fuel gas supply system that includes a confluence line that reduces the amount of gas. 제1항에 있어서,
상기 액화가스공급라인에 마련되고, 상기 저장탱크로부터 공급받은 액화가스와 상기 합류라인을 통해 공급받은 압축된 증발가스의 혼합물을 상기 수요처의 요구조건에 맞게 압축시키는 고압펌프와,
상기 압축된 혼합물을 기화시켜 상기 수요처로 공급하는 기화기를 더 포함하는 선박용 연료가스공급시스템.According to paragraph 1,
A high-pressure pump provided in the liquefied gas supply line and compressing a mixture of liquefied gas supplied from the storage tank and compressed boil-off gas supplied through the confluence line to meet the requirements of the customer;
A marine fuel gas supply system further comprising a vaporizer that vaporizes the compressed mixture and supplies it to the consumer. 제2항에 있어서,
상기 저장탱크 내부에 마련되며, 상기 저장탱크에 저장된 액화가스를 설정된 압력으로 펌핑하여 상기 액화가스공급라인을 통해 공급하는 내부펌프와,
상기 내부펌프에 의해 공급된 액화가스를 상기 압축부를 통과한 유체의 압력과 동일한 압력으로 압축하여 상기 고압펌프 쪽으로 공급하는 압축펌프를 더 포함하는 선박용 연료가스공급시스템.According to paragraph 2,
An internal pump provided inside the storage tank, which pumps the liquefied gas stored in the storage tank at a set pressure and supplies it through the liquefied gas supply line;
A marine fuel gas supply system further comprising a compression pump that compresses the liquefied gas supplied by the internal pump to the same pressure as the pressure of the fluid passing through the compression unit and supplies it to the high pressure pump. 제1항에 있어서,
상기 압축부는 교대로 배치된 하나 이상의 압축기와 냉각기를 포함하고,
상기 열교환부를 통과한 유체를 기체성분과 액체성분으로 분리시키는 기액분리기와,
상기 분리된 액체성분을 상기 압축기에 의해 압축된 증발가스와 열교환되도록 상기 냉각기로 공급하는 액체성분공급라인과,
상기 액체성분공급라인으로부터 분기되어 상기 냉각기와 연결되며, 상기 분리된 액체성분 중 일부를 공급받아 감압시키는 감압밸브를 마련한 감압라인과,
상기 냉각기로부터 상기 감압된 액체성분과 상기 열교환된 액체성분의 혼합물을 공급받아 상기 저장탱크로 공급하는 회수라인을 더 포함하는 선박용 연료가스공급시스템.According to paragraph 1,
The compression unit includes one or more compressors and coolers arranged alternately,
a gas-liquid separator that separates the fluid that has passed through the heat exchanger into a gas component and a liquid component;
a liquid component supply line that supplies the separated liquid component to the cooler to exchange heat with boil-off gas compressed by the compressor;
A pressure reducing line branched from the liquid component supply line and connected to the cooler, and provided with a pressure reducing valve to receive some of the separated liquid components and reduce the pressure;
A marine fuel gas supply system further comprising a recovery line that receives the mixture of the decompressed liquid component and the heat-exchanged liquid component from the cooler and supplies it to the storage tank. 제4항에 있어서,
상기 분리된 기체성분을 상기 재액화라인의 압축부 전단으로 공급하는 기체성분공급라인과,
상기 재액화라인의 압축부 전단에 마련되며, 상기 저장탱크로부터 공급된 증발가스와 상기 기체성분공급라인을 통해 공급된 기체성분을 혼합하여 저장하며, 상기 혼합된 유체 속에 함유된 액체성분의 불순물을 자중에 의해 제거하는 녹아웃드럼을 더 포함하는 선박용 연료가스공급시스템.According to clause 4,
a gas component supply line that supplies the separated gas component to the front end of the compression section of the reliquefaction line;
It is provided at the front of the compression section of the reliquefaction line, and stores a mixture of the boil-off gas supplied from the storage tank and the gas component supplied through the gas component supply line, and removes impurities of the liquid component contained in the mixed fluid. A marine fuel gas supply system that further includes a knockout drum that is removed by its own weight.
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