KR102559319B1 - System and Method of Treating Boil-Off Gas for Vessels - Google Patents

System and Method of Treating Boil-Off Gas for Vessels Download PDF

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KR102559319B1
KR102559319B1 KR1020180163460A KR20180163460A KR102559319B1 KR 102559319 B1 KR102559319 B1 KR 102559319B1 KR 1020180163460 A KR1020180163460 A KR 1020180163460A KR 20180163460 A KR20180163460 A KR 20180163460A KR 102559319 B1 KR102559319 B1 KR 102559319B1
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gas
heat exchanger
boil
engine
refrigerant
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KR1020180163460A
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Korean (ko)
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KR20200075200A (en
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정인돈
남병탁
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한화오션 주식회사
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    • 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
    • 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
    • F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
    • F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
    • 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
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • 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
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
    • F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
    • 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
    • B63B2770/00—
    • 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
    • F17C2227/0339—Heat exchange with the fluid by cooling using the 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
    • F17C2265/01—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
    • 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

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

Abstract

선박용 증발가스 처리 시스템이 개시된다.
상기 선박용 증발가스 처리 시스템은, 저장탱크로부터 배출되는 증발가스를 냉매로 사용하는 제1 열교환기; 상기 제1 열교환기에서 냉매로 사용된 증발가스를 압축시키는 압축기; 상기 압축기에 의해 압축된 증발가스를 1차로 열교환시켜 냉각시키는 제2 열교환기; 상기 제2 열교환기에 의해 1차로 냉각된 후 상기 제1 열교환기에 의해 2차로 열교환되어 냉각된 유체를 감압시키는 제1 감압장치; 상기 저장탱크로부터 배출되는 액화가스를 가압시키는 제2 펌프; 상기 제2 펌프에 의해 가압된 액화가스를 기화시키는 기화기; 및 상기 기화기에 의해 기화된 가스의 일부를 감압시키는 제2 감압장치;를 포함하고, 상기 기화기에 의해 기화된 가스는 두 흐름으로 분기되어, 한 흐름은 상기 제2 감압장치에 의해 감압된 후 상기 제2 열교환기의 냉매로 사용되고, 나머지 흐름은 제1 엔진의 연료로 공급되고, 상기 제2 열교환기의 냉매로 사용된 가스는 제2 엔진의 연료로 공급된다.A boil-off gas treatment system for ships is disclosed.
The boil-off gas treatment system for ships includes a first heat exchanger using boil-off gas discharged from a storage tank as a refrigerant; a compressor for compressing boil-off gas used as a refrigerant in the first heat exchanger; A second heat exchanger that cools the boil-off gas compressed by the compressor by primarily heat-exchanging it; a first decompression device for depressurizing the fluid cooled by the second heat exchanger after being primarily cooled by the second heat exchanger; A second pump pressurizing the liquefied gas discharged from the storage tank; a vaporizer for vaporizing the liquefied gas pressurized by the second pump; And a second pressure reducing device for reducing a part of the gas vaporized by the vaporizer; wherein the gas vaporized by the vaporizer is branched into two flows, one flow is used as a refrigerant of the second heat exchanger after being reduced by the second pressure reducing device, the remaining flow is supplied as fuel for the first engine, and the gas used as the refrigerant for the second heat exchanger is supplied as fuel for the second engine.

Figure R1020180163460
Figure R1020180163460

Description

선박용 증발가스 처리 시스템 및 방법{System and Method of Treating Boil-Off Gas for Vessels}Ship boil-off gas treatment system and method {System and Method of Treating Boil-Off Gas for Vessels}

본 발명은, 증발가스를 엔진의 연료로 공급하거나 재액화시켜 처리하는 시스템 및 방법에 관한 것이다.The present invention relates to a system and method for processing boil-off gas by supplying it as fuel for an engine or re-liquefying it.

근래, 액화천연가스(Liquefied Natural Gas, LNG) 등의 액화가스의 소비량이 전 세계적으로 급증하고 있는 추세이다. 가스를 저온에서 액화시킨 액화가스는 가스에 비해 부피가 매우 작아지므로 저장 및 이송 효율을 높일 수 있는 장점이 있다. 또한, 액화천연가스를 비롯한 액화가스는 액화공정 중에 대기오염 물질을 제거하거나 줄일 수 있어, 연소시 대기오염 물질 배출이 적은 친환경 연료로도 볼 수 있다. Recently, consumption of liquefied gas such as liquefied natural gas (LNG) is rapidly increasing worldwide. Since liquefied gas obtained by liquefying gas at a low temperature has a very small volume compared to gas, it has the advantage of increasing storage and transfer efficiency. In addition, liquefied gas, including liquefied natural gas, can remove or reduce air pollutants during the liquefaction process, and can be seen as an eco-friendly fuel with less air pollutant emissions during combustion.

액화천연가스는 메탄(methane)을 주성분으로 하는 천연가스를 약 -163℃로 냉각해서 액화시킴으로써 얻을 수 있는 무색투명한 액체로서, 천연가스와 비교해 약 1/600 정도의 부피를 가진다. 따라서, 천연가스를 액화시켜 이송할 경우 매우 효율적으로 이송할 수 있게 된다.Liquefied natural gas is a colorless and transparent liquid obtained by liquefying natural gas whose main component is methane by cooling it to about -163 ° C, and has a volume of about 1/600 compared to natural gas. Therefore, when the natural gas is liquefied and transported, it can be transported very efficiently.

그러나 천연가스의 액화 온도는 상압 -163 ℃의 극저온이므로, 액화천연가스는 온도변화에 민감하여 쉽게 증발된다. 이로 인해 액화천연가스를 저장하는 저장탱크에는 단열처리를 하지만, 외부의 열이 저장탱크에 지속적으로 전달되므로 액화천연가스 수송과정에서 저장탱크 내에서는 지속적으로 액화천연가스가 자연 기화되면서 증발가스(Boil-Off Gas, BOG)가 발생한다.However, since the liquefaction temperature of natural gas is a cryogenic temperature of -163 ° C., liquefied natural gas is sensitive to temperature changes and evaporates easily. As a result, although the storage tank for storing the liquefied natural gas is insulated, external heat is continuously transferred to the storage tank, so that the liquefied natural gas is continuously spontaneously vaporized in the storage tank during the transportation process of the liquefied natural gas, and boil-off gas (BOG) is generated.

증발가스는 일종의 손실로서 수송효율에 있어서 중요한 문제이다. 또한, 저장탱크 내에 증발가스가 축적되면 탱크 내압이 과도하게 상승할 수 있어, 심하면 탱크가 파손될 위험도 있다. 따라서, 저장탱크 내에서 발생하는 증발가스를 처리하기 위한 다양한 방법이 연구되는데, 최근에는 증발가스의 처리를 위해, 증발가스를 재액화하여 저장탱크로 복귀시키는 방법, 증발가스를 선박의 엔진 등 연료소비처의 에너지원으로 사용하는 방법 등이 사용되고 있다.Evaporation gas is a kind of loss and is an important problem in transportation efficiency. In addition, when boil-off gas is accumulated in the storage tank, the internal pressure of the tank may excessively rise, and in severe cases, there is a risk of damage to the tank. Therefore, various methods for treating the boil-off gas generated in the storage tank are being studied. Recently, for the treatment of boil-off gas, a method of re-liquefying the boil-off gas and returning it to the storage tank, and a method of using the boil-off gas as an energy source for fuel consumption such as a ship's engine have been used.

증발가스를 재액화하기 위한 방법으로는 별도의 냉매를 이용한 냉동 사이클을 구비하여 증발가스를 냉매와 열교환하여 재액화하는 방법, 및 별도의 냉매가 없이 증발가스 자체를 냉매로 하여 재액화하는 방법 등이 있다. 특히, 후자의 방법을 채용한 시스템을 부분 재액화 시스템(Partial Re-liquefaction System, PRS)이라고 한다.Methods for re-liquefying the boil-off gas include a method of re-liquefying the boil-off gas by heat exchange with the refrigerant by providing a refrigeration cycle using a separate refrigerant, and a method of re-liquefying the boil-off gas itself as a refrigerant without a separate refrigerant. In particular, a system employing the latter method is referred to as a partial re-liquefaction system (PRS).

한편, 일반적으로 선박에 사용되는 엔진 중 천연가스를 연료로 사용할 수 있는 엔진으로 DF 엔진, X-DF 엔진, ME-GI 엔진 등의 가스연료엔진이 있다.Meanwhile, among engines generally used in ships, engines that can use natural gas as fuel include gas fuel engines such as DF engines, X-DF engines, and ME-GI engines.

DF 엔진은, 4행정으로 구성되며, 비교적 저압인 6.5bar 정도의 압력을 가지는 천연가스를 연소공기 입구에 주입하여, 피스톤이 올라가면서 압축을 시키는 오토 사이클(Otto Cycle)을 채택하고 있다.The DF engine is composed of 4 strokes and adopts an Otto cycle in which natural gas having a relatively low pressure of about 6.5 bar is injected into the combustion air inlet and compressed while the piston rises.

X-DF 엔진은, 2행정으로 구성되고, 16 bar 정도의 천연가스를 연료로 사용하며, 오토 사이클을 채택하고 있다.The X-DF engine is composed of two strokes, uses natural gas at about 16 bar as fuel, and adopts an Otto cycle.

ME-GI 엔진은, 2행정으로 구성되며, 300bar 부근의 고압 천연가스를 피스톤의 상사점 부근에서 연소실에 직접 분사하는 디젤 사이클(Diesel Cycle)을 채택하고 있다.The ME-GI engine consists of two strokes and adopts a diesel cycle in which high-pressure natural gas around 300 bar is directly injected into the combustion chamber near the top dead center of the piston.

본 발명은, 액화가스를 가압 및 기화시켜 엔진의 연료로 공급하는 시스템과, 증발가스를 압축시켜 엔진의 연료로 공급하는 시스템을 동시에 운전하는 경우에, 증발가스의 재액화 효율 및 재액화량을 증가시킬 수 있는, 선박용 증발가스 처리 시스템 및 방법을 제공하고자 한다.The present invention, when a system for pressurizing and vaporizing liquefied gas and supplying it as engine fuel and a system for compressing and supplying boil-off gas to engine fuel are simultaneously operated, the re-liquefaction efficiency and re-liquefaction amount of boil-off gas can be increased. An object of the present invention is to provide a system and method for treating boil-off gas for ships.

상기 목적을 달성하기 위한 본 발명의 일 측면에 따르면, 저장탱크로부터 배출되는 증발가스를 냉매로 사용하는 제1 열교환기; 상기 제1 열교환기에서 냉매로 사용된 증발가스를 압축시키는 압축기; 상기 압축기에 의해 압축된 증발가스를 1차로 열교환시켜 냉각시키는 제2 열교환기; 상기 제2 열교환기에 의해 1차로 냉각된 후 상기 제1 열교환기에 의해 2차로 열교환되어 냉각된 유체를 감압시키는 제1 감압장치; 상기 저장탱크로부터 배출되는 액화가스를 가압시키는 제2 펌프; 상기 제2 펌프에 의해 가압된 액화가스를 기화시키는 기화기; 및 상기 기화기에 의해 기화된 가스의 일부를 감압시키는 제2 감압장치;를 포함하고, 상기 기화기에 의해 기화된 가스는 두 흐름으로 분기되어, 한 흐름은 상기 제2 감압장치에 의해 감압된 후 상기 제2 열교환기의 냉매로 사용되고, 나머지 흐름은 제1 엔진의 연료로 공급되고, 상기 제2 열교환기의 냉매로 사용된 가스는 제2 엔진의 연료로 공급되는, 선박용 증발가스 처리 시스템이 제공된다.According to one aspect of the present invention for achieving the above object, the first heat exchanger using the boil-off gas discharged from the storage tank as a refrigerant; a compressor for compressing boil-off gas used as a refrigerant in the first heat exchanger; A second heat exchanger that cools the boil-off gas compressed by the compressor by primarily heat-exchanging it; a first decompression device for depressurizing the fluid cooled by the second heat exchanger after being primarily cooled by the second heat exchanger; A second pump pressurizing the liquefied gas discharged from the storage tank; a vaporizer for vaporizing the liquefied gas pressurized by the second pump; And a second pressure reducing device for reducing a part of the gas vaporized by the vaporizer; wherein the gas vaporized by the vaporizer is branched into two flows, one flow is reduced by the second pressure reducing device and then used as a refrigerant for the second heat exchanger, the remaining flow is supplied as fuel for the first engine, and the gas used as the refrigerant for the second heat exchanger is supplied as fuel for the second engine.

상기 선박용 증발가스 처리 시스템은, 상기 압축기에 의해 압축된 증발가스의 일부를 감압시키는 제3 감압장치를 더 포함할 수 있고, 상기 제3 감압장치에 의해 감압된 유체는 상기 제2 감압장치에 의해 감압된 유체와 합류되어 상기 제2 열교환기의 냉매로 사용될 수 있다.The marine boil-off gas treatment system may further include a third pressure reducing device for reducing a part of the boil-off gas compressed by the compressor, and the fluid reduced by the third pressure reducing device may be joined with the fluid reduced by the second pressure reducing device and used as a refrigerant of the second heat exchanger.

상기 압축기는 다단 압축기일 수 있고, 상기 압축기의 전부 압축 과정을 거친 증발가스가 상기 제2 열교환기로 보내지고, 상기 압축기의 일부 압축 과정을 거친 증발가스는 상기 제2 엔진의 연료로 공급될 수 있다.The compressor may be a multi-stage compressor, the boil-off gas subjected to the entire compression process of the compressor is sent to the second heat exchanger, and the boil-off gas subjected to the partial compression process of the compressor may be supplied as fuel of the second engine.

상기 선박용 증발가스 처리 시스템은, 상기 제1 감압장치 하류에 설치되어 재액화된 액화가스와 기체 상태로 남아있는 증발가스를 분리하는 기액분리기를 더 포함할 수 있다.The boil-off gas treatment system for ships may further include a gas-liquid separator installed downstream of the first pressure reducing device to separate the re-liquefied liquefied gas and the boil-off gas remaining in a gaseous state.

상기 기액분리기에 의해 분리된 증발가스는, 상기 저장탱크로부터 배출된 증발가스와 합류되어 상기 제1 열교환기의 냉매로 사용될 수 있다.The evaporation gas separated by the gas-liquid separator may be joined with the evaporation gas discharged from the storage tank and used as a refrigerant of the first heat exchanger.

상기 선박용 증발가스 처리 시스템은, 상기 저장탱크 내부에 설치되는 제1 펌프를 더 포함할 수 있고, 상기 제1 펌프에 의해 가압되어 상기 저장탱크 외부로 배출된 액화가스가 상기 제2 펌프에 의해 가압될 수 있다.The boil-off gas treatment system for ships may further include a first pump installed inside the storage tank, and the liquefied gas pressurized by the first pump and discharged to the outside of the storage tank is pressurized by the second pump.

상기 선박용 증발가스 처리 시스템은, 상기 제2 열교환기에서 냉매로 사용된 가스를 가열하는 가열기를 더 포함할 수 있고, 상기 가열기에 의해 상기 제2 엔진의 요구 온도로 가열된 가스가 상기 제2 엔진의 연료로 공급될 수 있다.The boil-off gas treatment system for ships may further include a heater for heating a gas used as a refrigerant in the second heat exchanger, and the gas heated to a required temperature of the second engine by the heater may be supplied as fuel for the second engine.

상기 선박용 증발가스 처리 시스템은, 상기 제2 감압장치에 의해 감압된 가스를 상기 제2 열교환기를 우회시켜 상기 제2 엔진으로 공급하는 우회밸브를 더 포함할 수 있다.The boil-off gas treatment system for ships may further include a bypass valve for supplying the gas reduced by the second pressure reducing device to the second engine by bypassing the second heat exchanger.

상기 선박용 증발가스 처리 시스템은, 상기 압축기 하류에 설치되어 증발가스에 포함된 윤활유를 걸러내는 제1 윤활유분리장치를 더 포함할 수 있다.The evaporative gas treatment system for ships may further include a first lubricating oil separator installed downstream of the compressor to filter lubricating oil contained in the evaporative gas.

상기 제1 윤활유분리장치 하류에 설치되어 윤활유를 걸러내는 제2 윤활유분리장치를 더 포함할 수 있다.A second lubricating oil separator installed downstream of the first lubricating oil separator to filter out the lubricating oil may be further included.

상기 제1 감압장치 하류에 설치되어 윤활유를 걸러내는 제3 윤활유분리장치를 더 포함할 수 있다.A third lubricating oil separator installed downstream of the first pressure reducing device to filter lubricating oil may be further included.

상기 목적을 달성하기 위한 본 발명의 다른 측면에 따르면, 압축기에 의해 압축된 증발가스를, 저장탱크로부터 배출되는 증발가스를 냉매로 사용하여 제1 열교환기에 의해 열교환시켜 냉각시키고, 제1 감압장치에 의해 감압시켜 재액화시키는 선박용 증발가스 처리 방법에 있어서, 상기 저장탱크로부터 배출된 액화가스를 가압시킨 후 기화시키고, 기화된 가스를 감압시켜 증발가스 재액화의 냉매로 사용하는, 선박용 증발가스 처리 방법이 제공된다.According to another aspect of the present invention for achieving the above object, the boil-off gas compressed by the compressor is heat-exchanged and cooled by the first heat exchanger using the boil-off gas discharged from the storage tank as a refrigerant, and reduced by the first depressurizer to re-liquefy.

본 발명에 의하면, 제2 엔진의 연료로 사용되기 위하여 감압과정을 거치는 증발가스를 제2 열교환기의 냉매로 활용함으로써, 증발가스의 재액화 효율 및 재액화량을 증가시킬 수 있다.According to the present invention, the re-liquefaction efficiency and the amount of re-liquefaction of the boil-off gas can be increased by utilizing boil-off gas that has undergone a pressure reduction process to be used as fuel for the second engine as a refrigerant of the second heat exchanger.

도 1은 본 발명의 바람직한 실시예에 따른 선박용 증발가스 처리 시스템의 개략도이다.1 is a schematic diagram of a boil-off gas treatment system for ships according to a preferred embodiment of the present invention.

이하 첨부한 도면을 참조하여 본 발명의 바람직한 실시예에 대한 구성 및 작용을 상세히 설명하면 다음과 같다. 본 발명은, 천연가스를 연료로 사용하는 엔진을 탑재한 선박 및 액화가스 저장탱크를 포함하는 선박 등에 다양하게 응용되어 적용될 수 있다. 또한, 하기 실시예는 여러 가지 다른 형태로 변형될 수 있으며, 본 발명의 범위가 하기 실시예에 한정되는 것은 아니다.Hereinafter, the configuration and operation of a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention can be applied to a variety of applications, such as a ship equipped with an engine using natural gas as fuel and a ship including a liquefied gas storage tank. In addition, the following examples may be modified in many different forms, and the scope of the present invention is not limited to the following examples.

도 1은 본 발명의 바람직한 실시예에 따른 선박용 증발가스 처리 시스템의 개략도이다.1 is a schematic diagram of a boil-off gas treatment system for ships according to a preferred embodiment of the present invention.

도 1을 참조하면, 본 실시예의 선박용 증발가스 처리 시스템은, 제1 열교환기(110), 압축기(200), 제2 열교환기(120), 제1 감압장치(410), 제2 펌프(620), 기화기(700) 및 제2 감압장치(420)를 포함한다.Referring to FIG. 1, the boil-off gas treatment system for ships of this embodiment includes a first heat exchanger 110, a compressor 200, a second heat exchanger 120, a first decompression device 410, a second pump 620, a vaporizer 700 and a second decompression device 420.

저장탱크(T)로부터 배출된 증발가스는, 제1 열교환기(110)의 냉매로 사용된 후 압축기(200)로 보내져, 압축기(200)의 전부 압축 과정을 거친다. 압축기(200)는 다단 압축기일 수 있으며, 5단 압축기일 수 있다.The boil-off gas discharged from the storage tank (T) is used as a refrigerant in the first heat exchanger (110) and then sent to the compressor (200), where it undergoes a full compression process. The compressor 200 may be a multi-stage compressor or a 5-stage compressor.

압축기(200)의 일부 압축 과정을 거친 증발가스(일례로, 5단 압축 과정 중 2단 압축 과정을 거친 증발가스)는 제2 엔진(E2)으로 보내질 수 있다. 또한, 압축기(200)의 일부 압축 과정을 거친 증발가스는 가스연소장치(GCU; Gas Combustion Unit, G)로 보내질 수 있다.Boiled gas that has undergone partial compression of the compressor 200 (for example, boil-off gas that has undergone a 2-stage compression process among 5-stage compression processes) may be sent to the second engine E2. In addition, the boil-off gas that has undergone some compression of the compressor 200 may be sent to a gas combustion unit (GCU).

압축기(200)의 전부 압축 과정을 거친 증발가스는, 제2 열교환기(120)에 의해 1차로 열교환되어 냉각된 후, 제1 열교환기(110)에서 저장탱크(T)로부터 배출된 증발가스를 냉매로 사용하여 2차로 열교환되어 냉각된다.The boil-off gas that has gone through the entire compression process of the compressor 200 is firstly heat-exchanged and cooled by the second heat exchanger 120, and then discharged from the storage tank T in the first heat exchanger 110. The evaporated gas is used as a refrigerant and is secondarily heat-exchanged and cooled.

압축기(200)에 의한 압축 과정과, 제2 열교환기(120) 및 제1 열교환기(110)의 냉각 과정을 거친 유체는, 제1 감압장치(410)에 의한 감압 과정을 거쳐 일부 또는 전부가 재액화된다.The fluid that has undergone the compression process by the compressor 200 and the cooling process of the second heat exchanger 120 and the first heat exchanger 110 is partially or entirely reduced through the pressure reduction process by the first pressure reducing device 410. to be reliquefied

본 발명은, 제1 감압장치(410) 하류에 설치되어 재액화된 액화가스와 기체 상태로 남아있는 증발가스를 분리하는 기액분리기(500)를 더 포함할 수 있다. 기액분리기(500)에 의해 분리된 액화가스는 저장탱크(T)로 보내질 수 있고, 기액분리기(500)에 의해 분리된 증발가스는 저장탱크(T)로부터 배출된 증발가스와 합류되어 제1 열교환기(110)의 냉매로 사용될 수 있다.The present invention may further include a gas-liquid separator 500 installed downstream of the first pressure reducing device 410 to separate the re-liquefied liquefied gas and the boil-off gas remaining in a gaseous state. The liquefied gas separated by the gas-liquid separator 500 may be sent to the storage tank T, and the evaporation gas separated by the gas-liquid separator 500 is joined with the evaporation gas discharged from the storage tank T. It can be used as a refrigerant of the first heat exchanger 110.

한편, 저장탱크(T)로부터 배출된 액화가스는, 제2 펌프(620)에 의해 가압되고 기화기(700)에 의해 기화된 후 두 흐름으로 분기된다. 두 흐름으로 분기된 유체 중, 한 흐름은 제1 엔진(E1)의 연료로 공급되고, 나머지 흐름은 제2 감압장치(420)에 의해 감압된 후 제2 열교환기(120)의 냉매로 사용된다.Meanwhile, the liquefied gas discharged from the storage tank T is pressurized by the second pump 620 and vaporized by the vaporizer 700 and then branched into two streams. Of the fluid branched into two streams, one stream is supplied as fuel for the first engine E1, and the other stream is used as a refrigerant for the second heat exchanger 120 after being decompressed by the second pressure reducing device 420.

저장탱크(T) 내부에는 제1 펌프(610)가 설치될 수 있고, 제1 펌프(610)에 의해 가압되어 저장탱크(T) 외부로 배출된 액화가스가 제2 펌프(620) 및 기화기(700)를 통과하여 제1 엔진(E1)으로 공급될 수 있다.A first pump 610 may be installed inside the storage tank T, and the liquefied gas pressurized by the first pump 610 and discharged to the outside of the storage tank T may be supplied to the first engine E1 through the second pump 620 and the vaporizer 700.

제1 엔진(E1)은 ME-GI 엔진 등의 추진용 엔진일 수 있고, 제1 엔진(E1)이 ME-GI 엔진인 경우, 제2 펌프(620) 및 기화기(700)를 통과한 가스는 대략 300 bar, 45℃일 수 있다.The first engine E1 may be a propulsion engine such as an ME-GI engine, and when the first engine E1 is an ME-GI engine, the gas passing through the second pump 620 and the vaporizer 700 may be approximately 300 bar and 45 ° C.

제2 열교환기(120)에서 냉매로 사용된 가스는 제2 엔진(E2)의 연료로 사용되며, 제2 열교환기(120)에서 냉매로 사용된 가스는 가열기(800)에 의해 제2 엔진(E2)의 요구 온도로 가열된 후에 제2 엔진(E2)에 공급될 수 있다.The gas used as the refrigerant in the second heat exchanger 120 is used as a fuel for the second engine E2, and the gas used as the refrigerant in the second heat exchanger 120 is supplied to the second engine E2 after being heated to the required temperature of the second engine E2 by the heater 800.

제2 엔진(E2)은 제1 엔진(E1)보다 더 낮은 압력의 가스를 연료로 사용하는 엔진이며, DF 엔진 등의 발전용 엔진일 수 있다. 제2 엔진(E2)이 DF 엔진인 경우, 제2 감압장치(420)에 의해 감압된 가스는 대략 7 bar, -50℃일 수 있다.The second engine E2 is an engine that uses gas having a lower pressure than the first engine E1 as fuel, and may be a power generation engine such as a DF engine. When the second engine E2 is a DF engine, the gas decompressed by the second pressure reducing device 420 may be approximately 7 bar and -50°C.

본 발명에서는, 제1 엔진(E1)보다 더 낮은 압력의 가스를 연료로 사용하는 제2 엔진(E2)에 연료를 공급하기 위하여, 제1 엔진(E1)의 요구 압력으로 가압된 가스를 제2 감압장치(420)에 의해 제2 엔진(E2)의 요구 압력으로 감압시키면, 압력뿐만 아니라 온도도 낮아지므로, 온도가 낮아진 유체를 제2 열교환기(120)에서 증발가스를 재액화시키기 위한 냉매로 활용한 후, 제2 엔진(E2)으로 공급하는 것이다.In the present invention, in order to supply fuel to the second engine E2 using gas having a lower pressure than the first engine E1 as fuel, when the gas pressurized to the required pressure of the first engine E1 is reduced to the required pressure of the second engine E2 by the second pressure reducing device 420, not only the pressure but also the temperature is lowered. ) to supply.

제2 열교환기(120)가 고장나거나 유지, 보수 등의 이유로 제2 열교환기(120)를 사용할 수 없는 경우에는, 제2 감압장치(420)에 의해 감압된 가스를 우회밸브(V)에 의해 제2 열교환기(120)를 우회시켜 제2 엔진(E2)으로(가열기(800)를 포함하는 경우에는 가열기(800)에 의해 가열한 후 제2 엔진(E2)으로) 공급할 수 있다.When the second heat exchanger 120 fails or cannot be used due to maintenance, repair, etc., the gas reduced by the second pressure reducing device 420 is bypassed by the bypass valve V to the second heat exchanger 120 and supplied to the second engine E2 (if the heater 800 is included, heated by the heater 800 and then to the second engine E2).

본 발명의 일 실시예에 의하면, 압축기(200)에 의한 전부 압축 과정을 거친 증발가스 중 일부를 제3 감압장치(430)에 의해 감압시킨 후에, 제2 감압장치(420)에 의해 감압된 가스와 합류시켜 제2 열교환기(120)의 냉매로 사용할 수 있다. 제2 엔진(E2)이 DF 엔진인 경우, 제3 감압장치(430)에 의해 감압된 증발가스는 대략 7 bar일 수 있다.According to one embodiment of the present invention, after some of the evaporation gas that has undergone the entire compression process by the compressor 200 is reduced by the third decompression device 430, and then reduced by the second decompression device 420, it can be joined with the gas and used as a refrigerant of the second heat exchanger 120. When the second engine E2 is a DF engine, boil-off gas reduced by the third pressure reducing device 430 may be approximately 7 bar.

본 발명은 압축기(200) 하류에 설치되어 증발가스에 포함된 윤활유를 걸러내는 제1 윤활유분리장치(310)를 더 포함할 수 있다. 압축기(200)가 급유 윤활 방식의 실린더를 포함하는 경우, 증발가스가 압축기(200)에 의해 압축되며 증발가스에 소량의 윤활유가 섞일 수 있고, 증발가스에 섞인 윤활유는 제2 열교환기(120) 및 제1 열교환기(110)에서 냉각되며 열교환기의 유로를 막을 수 있으므로, 걸러낼 필요가 있다. 제1 윤활유분리장치(310)는 코어레서(Coalescer)일 수 있다.The present invention may further include a first lubricating oil separator 310 installed downstream of the compressor 200 to filter out lubricating oil contained in boil-off gas. When the compressor 200 includes a cylinder of oil supply lubrication method, the boil-off gas is compressed by the compressor 200 and a small amount of lubricating oil may be mixed in the boil-off gas, and the lubricating oil mixed in the boil-off gas is cooled in the second heat exchanger 120 and the first heat exchanger 110 and may block the flow path of the heat exchanger, so it is necessary to filter it out. The first lubricant separation device 310 may be a coalescer.

본 발명은 제1 윤활유분리장치(310) 하류에 설치되어, 추가적으로 윤활유를 걸러내는 제2 윤활유분리장치(320)를 더 포함할 수 있다. 제2 윤활유분리장치(320)는 흡착기(Adsorber)일 수 있다.The present invention may further include a second lubricant separator 320 installed downstream of the first lubricant separator 310 to additionally filter the lubricant. The second lubricant separator 320 may be an adsorber.

본 발명은 제1 감압장치(410) 하류에 설치되어 윤활유를 걸러내는 제3 윤활유분리장치(330)를 더 포함할 수 있다. 제2 열교환기(120), 제1 열교환기(110) 및 제1 감압장치(410)를 거치며 유체는 극저온으로 냉각되므로, 제3 윤활유분리장치(330)는 극저온 용(Cryogenic)으로 설계된다. 또한, 극저온의 유체에 섞인 윤활유는 유동점 아래의 고체(또는 응고된) 상태이므로, 제3 윤활유분리장치(330)는 고체(또는 응고된) 상태의 윤활유를 걸러내게 된다.The present invention may further include a third lubricant separator 330 installed downstream of the first pressure reducing device 410 to filter the lubricant. Since the fluid is cooled to cryogenic temperatures through the second heat exchanger 120, the first heat exchanger 110, and the first pressure reducing device 410, the third lubricant separator 330 is designed for cryogenic use. In addition, since the lubricating oil mixed in the cryogenic fluid is in a solid (or solidified) state below the pour point, the third lubricating oil separator 330 filters out the lubricating oil in a solid (or solidified) state.

본 발명에 의하면, 제2 엔진(E2)의 연료로 사용되기 위하여 감압과정을 거치는 가스를 제2 열교환기(120)의 냉매로 활용함으로써, 액화가스를 가압 및 기화시켜 엔진의 연료로 공급하는 시스템(제2 펌프(620) 및 기화기(700) 포함)과, 증발가스를 압축시켜 엔진의 연료로 공급하는 시스템(압축기(200) 포함)을 동시에 운전하는 경우에, 증발가스의 재액화 효율 및 재액화량을 증가시킬 수 있다. 제1 엔진(E1)이 ME-GI 엔진이고 제2 엔진(E2)이 DF 엔진인 경우, 시뮬레이션 결과 재액화 효율이 대략 5 내지 7% 상승하였다.According to the present invention, by utilizing the gas that has undergone a depressurization process to be used as fuel for the second engine E2 as a refrigerant of the second heat exchanger 120, when a system for pressurizing and vaporizing liquefied gas and supplying it as engine fuel (including the second pump 620 and vaporizer 700) and a system for compressing and supplying boil-off gas as fuel for the engine (including compressor 200) are simultaneously operated, re-liquefaction efficiency and amount of re-liquefaction of boil-off gas can increase When the first engine E1 is an ME-GI engine and the second engine E2 is a DF engine, the reliquefaction efficiency increases by approximately 5 to 7% as a result of the simulation.

본 발명은 상기 실시예에 한정되지 않고, 본 발명의 기술적 요지를 벗어나지 아니하는 범위 내에서 다양하게 수정 또는 변형되어 실시될 수 있음은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에 있어서 자명한 것이다.It is obvious to those skilled in the art that the present invention is not limited to the above embodiments and can be variously modified or modified without departing from the technical gist of the present invention.

T : 저장탱크 G : 가스연소장치
E1 : 제1 엔진 E2 : 제2 엔진
V : 우회밸브 110 : 제1 열교환기
120 : 제2 열교환기 200 : 압축기
310 : 제1 윤활유분리장치 320 : 제2 윤활유분리장치
330 : 제3 윤활유분리장치 410 : 제1 감압장치
420 : 제2 감압장치 430 : 제3 감압장치
500 : 기액분리기 610 : 제1 펌프
620 : 제2 펌프 700 : 기화기
800 : 가열기T: storage tank G: gas combustion device
E1: 1st engine E2: 2nd engine
V: bypass valve 110: first heat exchanger
120: second heat exchanger 200: compressor
310: first lubricant separator 320: second lubricant separator
330: third lubricant separator 410: first decompression device
420: second pressure reducing device 430: third pressure reducing device
500: gas-liquid separator 610: first pump
620: second pump 700: vaporizer
800: heater

Claims (12)

저장탱크로부터 배출되는 증발가스를 냉매로 사용하는 제1 열교환기;
상기 제1 열교환기에서 냉매로 사용된 증발가스를 압축시키는 압축기;
상기 압축기에 의해 압축된 증발가스를 1차로 열교환시켜 냉각시키는 제2 열교환기;
상기 제2 열교환기에 의해 1차로 냉각된 후 상기 제1 열교환기에 의해 2차로 열교환되어 냉각된 유체를 감압시키는 제1 감압장치;
상기 저장탱크로부터 배출되는 액화가스를 가압시키는 제2 펌프;
상기 제2 펌프에 의해 가압된 액화가스를 기화시키는 기화기; 및
상기 기화기에 의해 기화된 가스의 일부를 감압시키는 제2 감압장치;를 포함하고,
상기 기화기에 의해 기화된 가스는 두 흐름으로 분기되어, 한 흐름은 상기 제2 감압장치에 의해 감압된 후 상기 제2 열교환기의 냉매로 사용되고, 나머지 흐름은 제1 엔진의 연료로 공급되고,
상기 제2 열교환기의 냉매로 사용된 가스는 제2 엔진의 연료로 공급되는, 선박용 증발가스 처리 시스템.A first heat exchanger using boil-off gas discharged from the storage tank as a refrigerant;
a compressor for compressing boil-off gas used as a refrigerant in the first heat exchanger;
A second heat exchanger that cools the boil-off gas compressed by the compressor by primarily heat-exchanging it;
a first decompression device for depressurizing the fluid cooled by the second heat exchanger after being primarily cooled by the second heat exchanger;
A second pump pressurizing the liquefied gas discharged from the storage tank;
a vaporizer for vaporizing the liquefied gas pressurized by the second pump; and
A second pressure reducing device for reducing a part of the gas vaporized by the vaporizer; includes,
The gas vaporized by the vaporizer is branched into two streams, one stream is used as a refrigerant of the second heat exchanger after being decompressed by the second pressure reducing device, and the remaining stream is supplied as fuel for the first engine,
The gas used as the refrigerant of the second heat exchanger is supplied as fuel for the second engine. 청구항 1에 있어서,
상기 압축기에 의해 압축된 증발가스의 일부를 감압시키는 제3 감압장치를 더 포함하고,
상기 제3 감압장치에 의해 감압된 유체는 상기 제2 감압장치에 의해 감압된 유체와 합류되어 상기 제2 열교환기의 냉매로 사용되는, 선박용 증발가스 처리 시스템.The method of claim 1,
Further comprising a third pressure reducing device for reducing a portion of the boil-off gas compressed by the compressor,
The fluid depressurized by the third decompression device is joined with the fluid decompressed by the second decompression device and used as a refrigerant of the second heat exchanger. 청구항 1 또는 청구항 2에 있어서,
상기 압축기는 다단 압축기이고,
상기 압축기의 전부 압축 과정을 거친 증발가스가 상기 제2 열교환기로 보내지고,
상기 압축기의 일부 압축 과정을 거친 증발가스는 상기 제2 엔진의 연료로 공급되는, 선박용 증발가스 처리 시스템.According to claim 1 or claim 2,
The compressor is a multi-stage compressor,
The evaporation gas that has undergone the entire compression process of the compressor is sent to the second heat exchanger,
The boil-off gas treatment system for ships, which has undergone a partial compression process of the compressor, is supplied as fuel for the second engine. 청구항 1 또는 청구항 2에 있어서,
상기 제1 감압장치 하류에 설치되어 재액화된 액화가스와 기체 상태로 남아있는 증발가스를 분리하는 기액분리기를 더 포함하는, 선박용 증발가스 처리 시스템.According to claim 1 or claim 2,
Further comprising a gas-liquid separator installed downstream of the first pressure reducing device to separate the re-liquefied liquefied gas and the boil-off gas remaining in a gaseous state. 청구항 4에 있어서,
상기 기액분리기에 의해 분리된 증발가스는, 상기 저장탱크로부터 배출된 증발가스와 합류되어 상기 제1 열교환기의 냉매로 사용되는, 선박용 증발가스 처리 시스템.The method of claim 4,
The boil-off gas separated by the gas-liquid separator is joined with the boil-off gas discharged from the storage tank and used as a refrigerant of the first heat exchanger. 청구항 1 또는 청구항 2에 있어서,
상기 저장탱크 내부에 설치되는 제1 펌프를 더 포함하고,
상기 제1 펌프에 의해 가압되어 상기 저장탱크 외부로 배출된 액화가스가 상기 제2 펌프에 의해 가압되는, 선박용 증발가스 처리 시스템.According to claim 1 or claim 2,
Further comprising a first pump installed inside the storage tank,
The liquefied gas discharged to the outside of the storage tank after being pressurized by the first pump is pressurized by the second pump. 청구항 1 또는 청구항 2에 있어서,
상기 제2 열교환기에서 냉매로 사용된 가스를 가열하는 가열기를 더 포함하고,
상기 가열기에 의해 상기 제2 엔진의 요구 온도로 가열된 가스가 상기 제2 엔진의 연료로 공급되는, 선박용 증발가스 처리 시스템.According to claim 1 or claim 2,
Further comprising a heater for heating the gas used as a refrigerant in the second heat exchanger,
The boil-off gas treatment system for ships, in which the gas heated to the required temperature of the second engine by the heater is supplied as fuel of the second engine. 청구항 1 또는 청구항 2에 있어서,
상기 제2 감압장치에 의해 감압된 가스를 상기 제2 열교환기를 우회시켜 상기 제2 엔진으로 공급하는 우회밸브를 더 포함하는, 선박용 증발가스 처리 시스템.According to claim 1 or claim 2,
Further comprising a bypass valve for bypassing the gas reduced by the second pressure reducing device to the second heat exchanger and supplying the gas to the second engine. 청구항 1 또는 청구항 2에 있어서,
상기 압축기 하류에 설치되어 증발가스에 포함된 윤활유를 걸러내는 제1 윤활유분리장치를 더 포함하는, 선박용 증발가스 처리 시스템.According to claim 1 or claim 2,
Further comprising a first lubricating oil separator installed downstream of the compressor to filter out the lubricating oil contained in the evaporating gas, the vessel boil-off gas treatment system. 청구항 9에 있어서,
상기 제1 윤활유분리장치 하류에 설치되어 윤활유를 걸러내는 제2 윤활유분리장치를 더 포함하는, 선박용 증발가스 처리 시스템.The method of claim 9,
Further comprising a second lubricant separator for filtering the lubricant installed downstream of the first lubricant separator. 청구항 1 또는 청구항 2에 있어서,
상기 제1 감압장치 하류에 설치되어 윤활유를 걸러내는 제3 윤활유분리장치를 더 포함하는, 선박용 증발가스 처리 시스템.According to claim 1 or claim 2,
Further comprising a third lubricating oil separator installed downstream of the first pressure reducing device to filter the lubricating oil, the vessel boil-off gas treatment system. 삭제delete
KR1020180163460A 2018-12-17 2018-12-17 System and Method of Treating Boil-Off Gas for Vessels KR102559319B1 (en)

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