KR20160112707A - Reliquefaction system - Google Patents

Reliquefaction system Download PDF

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KR20160112707A
KR20160112707A KR1020150038916A KR20150038916A KR20160112707A KR 20160112707 A KR20160112707 A KR 20160112707A KR 1020150038916 A KR1020150038916 A KR 1020150038916A KR 20150038916 A KR20150038916 A KR 20150038916A KR 20160112707 A KR20160112707 A KR 20160112707A
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gas
oil
unit
storage tank
compressed
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KR1020150038916A
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Korean (ko)
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KR101741756B1 (en
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유호연
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삼성중공업 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
    • F02M21/0209—Hydrocarbon fuels, e.g. methane or acetylene
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/02—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with liquefied gases
    • 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
    • F17C6/00—Methods and apparatus for filling vessels not under pressure with liquefied or solidified gases
    • 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
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • 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
    • F17C2227/0339—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
    • 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
    • F17C2265/03—Treating the boil-off
    • F17C2265/032—Treating the boil-off by recovery
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/032—Treating the boil-off by recovery
    • F17C2265/033—Treating the boil-off by recovery with cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—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
    • 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)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Combustion & Propulsion (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

A reliquefaction system is disclosed. The reliquefaction system, according to an embodiment of the present invention, comprises: a storage tank which stores liquefied gas and the boil-off gas of the liquefied gas; a compression part which compresses the boil-off gas supplied from the storage tank; and an oil removal part which exchanges the heat of the boil-off gas supplied from the storage tank with the compressed boil-off gas containing oil supplied from the compression part to remove the oil contained in the compressed boil-off gas.

Description

재액화 시스템{RELIQUEFACTION SYSTEM}RELIQUACTION SYSTEM

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

온실가스 및 각종 대기오염 물질의 배출에 대한 국제해사기구(IMO, International Maritime Organization)의 규제가 강화됨에 따라 조선 및 해운업계에서는 기존 연료인 중유, 디젤유의 이용을 대신하여, 청정 에너지원인 천연가스를 선박의 연료가스로 이용하는 경우가 많아지고 있다.As the regulations of the International Maritime Organization (IMO) on the emission of greenhouse gases and various air pollutants have been strengthened, the shipbuilding and marine industries have replaced natural fuels such as heavy oil and diesel oil, And it is often used as a fuel gas of a ship.

연료가스 중에서 널리 이용되고 있는 천연가스(Natural Gas)는 메탄(Methane)을 주성분으로 하며, 통상적으로 그 부피를 1/600로 줄인 액화가스(Liquefied Gas) 상태로 변환시켜 저장 및 운반을 하고 있다.Natural gas, which is widely used in fuel gas, is mainly composed of methane, and is usually stored and transported into a liquefied gas state in which the volume thereof is reduced to 1/600.

이러한 액화가스는 선체에 단열 처리되어 설치되는 저장탱크에 수용되어 저장 및 수송되며, 선박의 엔진은 액화가스 또는 증발가스(Boiled Off Gas) 등을 연료가스로 공급받아 구동된다. 여기서 증발가스는 저장탱크 내부에 수용된 액화가스가 자연적으로 기화하여 발생되는 자연증발가스 및 강제적으로 기화하여 발생되는 강제증발가스를 포함한다. 액화가스 또는 증발가스는 압축 및 기화 등의 처리과정을 거쳐 엔진이 요구하는 조건에 맞추어 공급된다.The liquefied gas is stored and transported in a storage tank which is installed in a heat insulation treatment on the hull, and the engine of the ship is driven by supplying liquefied gas or boiled off gas to the fuel gas. Here, the evaporation gas includes a natural evaporation gas generated by naturally vaporizing the liquefied gas contained in the storage tank, and a forced evaporation gas generated by forcibly vaporizing. The liquefied gas or the evaporated gas is supplied according to the conditions required by the engine through a process such as compression and vaporization.

한편 최근에는 선박의 추진용 또는 선박의 발전용으로 DFDE(Dual Fuel Disel Electric) 엔진 등과 같은 저압(약 5~8bar)의 분사엔진 및 ME-GI 엔진(Man B&W 사의 Gas Injection 엔진)과 같은 고압(약 150~400bar)의 분사엔진이 널리 이용되고 있다. 또한 중압(약 16~18bar)의 연료가스로 연소가 가능한 중압가스 분사엔진이 개발되어 이용되고 있다. In recent years, a high-pressure (about 5 to 8 bar) injection engine such as a DFDE (Dual Fuel Disel Electric) engine and a high-pressure About 150 ~ 400 bar) injection engines are widely used. In addition, a medium pressure gas injection engine capable of combusting with medium pressure (about 16 to 18 bar) fuel gas has been developed and used.

이러한 선박에는 LNG 증발가스를 재액화하여 저장탱크에 재저장하는 재액화 설비가 마련될 수 있다. 예컨대, 한국공개특허 제10-2012-0103421호(2012. 09. 19. 공개)는 저장탱크에서 발생한 증발가스를 압축부에서 압축한 후 재액화 장치에서 액화시키고, 이를 고압펌프로 공급하거나 저장탱크에 재저장하는 시스템을 제시한다.These vessels may be provided with a liquefaction facility for re-liquefying the LNG vaporized gas and re-storing it in a storage tank. For example, Korean Patent Laid-Open Publication No. 10-2012-0103421 (published on September 19, 2012) discloses a method of compressing evaporated gas generated in a storage tank by a compression unit and liquefying it in a re-liquefier, In the system.

여기서, 다단의 압축기를 포함하는 압축부에서 증발가스를 압축할 경우, 압축을 거친 증발가스에는 압축기의 마모를 방지하기 위해 사용된 오일이 함유될 수 있다. 이러한 오일이 함유된 증발가스가 재액화되어 저장탱크에 저장될 경우, 저장탱크를 오염시킬 수 있다.Here, when the evaporation gas is compressed in the compression section including the multi-stage compressor, the compressed evaporation gas may contain the oil used to prevent the compressor from being worn. If the oil-containing evaporated gas is re-liquefied and stored in a storage tank, it may contaminate the storage tank.

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

본 발명의 실시 예는 압축된 증발가스에 함유된 오일을 저장탱크로부터 공급된 증발가스와의 열교환에 의해 효과적으로 제거하고, 오일이 제거된 증발가스에 대한 재액화가 수행되는 재액화 시스템을 제공하고자 한다.An embodiment of the present invention seeks to provide a re-liquefaction system in which the oil contained in the compressed evaporated gas is effectively removed by heat exchange with the evaporated gas supplied from the storage tank and the re-liquefaction of the oil-removed evaporated gas is performed .

본 발명의 일 측면에 따르면, 액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크; 상기 저장탱크로부터 공급된 증발가스를 압축시키는 압축부; 및 상기 저장탱크로부터 공급받은 증발가스와 상기 압축부로부터 공급받은 오일이 함유된 압축된 증발가스 간 열교환을 수행하여, 상기 압축된 증발가스에 함유된 오일을 제거하는 오일제거부;를 포함하는 재액화 시스템이 제공될 수 있다.According to an aspect of the present invention, there is provided a storage tank for storing a liquefied gas and an evaporated gas of the liquefied gas; A compression unit for compressing the evaporation gas supplied from the storage tank; And an oil removing unit for performing heat exchange between the evaporated gas supplied from the storage tank and the compressed evaporated gas containing oil supplied from the compressed unit to remove the oil contained in the compressed evaporated gas, A liquefaction system may be provided.

상기 오일제거부를 거쳐 오일이 제거된 압축된 증발가스의 기체성분과 상기 압축부를 거쳐 오일이 함유된 압축된 증발가스 각각에 대해 상기 오일제거부를 거친 상기 저장탱크로부터 공급된 증발가스와의 열교환을 수행하는 열교환부와, 상기 열교환부를 거친 오일이 제거된 압축된 증발가스의 기체성분을 재액화시키는 재액화부를 더 포함할 수 있다.And performs heat exchange between the gas component of the compressed evaporated gas from which the oil has been removed through the oil removing section and the evaporated gas supplied from the storage tank through the oil removing section to each of the compressed evaporated gas containing oil via the compressed section And a re-liquefaction unit for re-liquefying the gas component of the compressed evaporated gas from which the oil passed through the heat exchanging unit has been removed.

상기 저장탱크로부터 공급된 증발가스를 상기 오일제거부, 상기 열교환부 및 상기 압축부를 거쳐 엔진 쪽으로 공급하는 제1공급라인과, 상기 압축부에 의해 적어도 4단 이상의 압축을 거친 지점으로부터 분기되어, 상기 열교환부 및 상기 오일제거부 쪽으로 상기 압축부로부터 공급받은 오일이 함유된 압축된 증발가스를 공급하는 제2공급라인과, 상기 오일제거부에 의해 오일이 제거된 압축된 증발가스의 기체성분이 상기 열교환부 및 상기 재액화부를 거쳐 상기 저장탱크로 공급되도록 하는 제3공급라인을 더 포함할 수 있다.A first supply line for supplying the evaporation gas supplied from the storage tank to the engine via the oil removing unit, the heat exchanging unit, and the compression unit; and a second supply line branched from the compressed point by at least four stages, A second supply line for supplying a compressed evaporation gas containing oil supplied from the compression section to the heat exchanging section and the oil removal section; and a second supply line for supplying a gas component of the compressed evaporated gas, And a third supply line for supplying the heat to the storage tank through the heat exchanging part and the re-curing part.

상기 오일제거부를 거쳐 상기 오일이 제거된 압축된 증발가스 액체성분을 상기 저장탱크로 공급하는 회수라인을 더 포함할 수 있다.And a recovering line for supplying the compressed evaporated gas liquid component from which the oil has been removed to the storage tank through the oil removing unit.

본 발명의 실시 예에 의한 재액화 시스템은 압축된 증발가스에 함유된 오일을 저장탱크로부터 공급된 증발가스와의 열교환에 의해 제거하고, 오일이 제거된 증발가스에 대한 재액화가 수행될 수 있다.The refill liquor system according to the embodiment of the present invention can remove the oil contained in the compressed evaporated gas by heat exchange with the evaporated gas supplied from the storage tank and perform re-liquefaction on the evaporated gas from which the oil is removed.

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

도 1은 본 발명의 실시 예에 의한 재액화 시스템을 나타낸다.Fig. 1 shows a re-liquefaction system according to an embodiment of the present invention.

이하에서는 본 발명의 실시 예를 첨부 도면을 참조하여 상세히 설명한다. 이하의 실시 예는 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 본 발명의 사상을 충분히 전달하기 위해 제시하는 것이다. 본 발명은 여기서 제시한 실시 예만으로 한정되지 않고 다른 형태로 구체화될 수도 있다. 도면은 본 발명을 명확히 하기 위해 설명과 관계 없는 부분의 도시를 생략하고, 이해를 돕기 위해 구성요소의 크기를 다소 과장하여 표현할 수 있다. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are provided to fully convey the spirit of the present invention to a person having ordinary skill in the art to which the present invention belongs. The present invention is not limited to the embodiments shown herein but may be embodied in other forms. For the sake of clarity, the drawings are not drawn to scale, and the size of the elements may be slightly exaggerated to facilitate understanding.

도 1은 본 발명의 실시 예에 의한 재액화 시스템을 나타낸다.Fig. 1 shows a re-liquefaction system according to an embodiment of the present invention.

도 1을 참조하면, 본 발명의 실시 예에 의한 재액화 시스템(100)은 각종 액화연료 운반선, 액화연료 RV(Regasification Vessel), 컨테이너선, 일반상선, LNG FPSO(Floating, Production, Storage and Off-loading), LNG FSRU(Floating Storage and Regasification Unit) 등을 포함하는 선박에 구비될 수 있다.1, the re-liquefaction system 100 according to an embodiment of the present invention includes various liquefied fuel carriers, a liquefied fuel RV (regasification vessel), a container ship, a general merchant vessel, an LNG FPSO (Floating, Production, Storage and Off- loading, LNG FSRU (Floating Storage and Regasification Unit), and the like.

재액화 시스템(100)은 액화가스 및 액화가스의 증발가스를 저장하는 저장탱크(10), 저장탱크(10)로부터 공급된 증발가스를 압축시키는 압축부(20), 저장탱크(10)로부터 공급받은 증발가스와 압축부(20)로부터 공급받은 오일이 함유된 압축된 증발가스 간 열교환을 수행하여, 압축된 증발가스에 함유된 오일을 제거하는 오일제거부(30), 오일제거부(30)를 거쳐 오일이 제거된 압축된 증발가스의 기체성분과 압축부(20)를 거쳐 오일이 함유된 압축된 증발가스 각각에 대해 오일제거부(30)를 거친 저장탱크(10)로부터 공급된 증발가스와의 열교환을 수행하는 열교환부(40), 및 열교환부(40)를 거친 오일이 제거된 압축된 증발가스의 기체성분을 재액화시키는 재액화부(50)를 포함한다.The re-liquefaction system 100 includes a storage tank 10 for storing evaporative gas of liquefied gas and liquefied gas, a compression section 20 for compressing the evaporated gas supplied from the storage tank 10, An oil removing unit 30 for performing heat exchange between the received evaporating gas and the compressed evaporating gas containing the oil supplied from the compressing unit 20 to remove the oil contained in the compressed evaporating gas, And the evaporated gas supplied from the storage tank 10 through the oil removing unit 30 to the compressed evaporated gas containing the oil via the compressing unit 20, And a re-fluidifying unit 50 for re-liquefying the gas components of the compressed evaporated gas from which the oil has been removed through the heat exchanging unit 40. The re-

또, 재액화 시스템(100)은 저장탱크(10)로부터 공급된 증발가스를 오일제거부(30), 열교환부(40) 및 압축부(20)를 거쳐 엔진(E) 쪽으로 공급하는 제1공급라인(L1)과, 압축부(20)에 의해 적어도 4단 이상의 압축을 거친 지점으로부터 분기되어, 열교환부(40) 및 오일제거부(30) 쪽으로 오일이 함유된 압축된 증발가스를 공급하는 제2공급라인(L2)과, 오일제거부(30)에 의해 오일이 제거된 압축된 증발가스의 기체성분이 열교환부(40) 및 재액화부(50)를 거쳐 저장탱크(10)로 공급되도록 하는 제3공급라인(L3)과, 오일제거부(30)를 거쳐 오일이 제거된 압축된 증발가스의 액체성분을 저장탱크(10) 쪽으로 공급하는 회수라인(L4)을 포함한다. 여기서, 상술한 엔진(E)은 일 예로 ME-GI 엔진과 같은 고압가스 분사엔진일 수 있다.The re-liquefaction system 100 includes a first supply unit 30 for supplying the evaporation gas supplied from the storage tank 10 to the engine E via the oil removing unit 30, the heat exchanging unit 40 and the compression unit 20, A line L1 and a device for supplying compressed evaporated gas containing oil to the heat exchanging unit 40 and the oil removing unit 30 by branching from a point compressed by at least four stages by the compressing unit 20, 2 supply line L2 and the gas component of the compressed evaporated gas from which oil has been removed by the oil remover 30 is supplied to the storage tank 10 via the heat exchanging unit 40 and the re- A third supply line L3 and a recovery line L4 for supplying the liquid component of the compressed evaporated gas from which the oil has been removed via the oil remover 30 to the storage tank 10 side. Here, the engine E described above may be a high-pressure gas injection engine such as an ME-GI engine.

저장탱크(10)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. 저장탱크(10)는 단열상태를 유지하면서 연료를 액화상태로 저장하는 멤브레인형 탱크, SPB형 탱크 등을 포함할 수 있다. 저장탱크(10)는 액화가스가 LNG일 경우 내부압력이 1bar를 유지하거나 연료공급조건을 고려해 그보다 높은 압력으로 유지할 수 있고, 액화상태 유지를 위해 내부온도가 ―163℃도 정도를 유지할 수 있다. The liquefied gas stored in the storage tank 10 may be any one of Liquefied Natural Gas (LNG), Liquefied Petroleum Gas (LPG), Dimethylether (DME), and Ethane which can be stored in a liquefied state, but is not limited thereto . The storage tank 10 may include a membrane type tank, an SPB type tank, and the like which store the fuel in a liquefied state while maintaining an adiabatic state. When the liquefied gas is LNG, the storage tank 10 can maintain the internal pressure at 1 bar or the pressure higher than the internal pressure in consideration of the fuel supply condition, and maintain the internal temperature at about -163 DEG C to maintain the liquefied state.

저장탱크(10) 내부에는 송출펌프(12)가 설치되어, 미리 설정된 압력에 따라 저장탱크(10)에 저장된 액화가스를 공급라인(L5)을 통해 엔진(E) 쪽으로 송출할 수 있다. 공급라인(L5)에 설치된 압력펌프(14)와 기화기(16)는 엔진(E)의 연료가스 공급조건에 맞게 저장탱크(10)로부터 공급라인(L5)을 통해 공급되는 액화가스의 압력, 상태, 온도 등을 변환시킬 수 있다.A feed pump 12 is installed inside the storage tank 10 so that the liquefied gas stored in the storage tank 10 can be sent to the engine E through the feed line L5 according to a preset pressure. The pressure pump 14 and the vaporizer 16 provided in the supply line L5 are operated to control the pressure of the liquefied gas supplied from the storage tank 10 through the supply line L5 in accordance with the fuel gas supply conditions of the engine E, , Temperature, and so on.

압축부(20)는 하나 이상의 압축기(22) 및 압축기(22)에서 압축되면서 온도가 상승한 증발가스를 냉각시키기 위해 압축기(22)와 교대로 배치된 냉각기(미도시)를 포함할 수 있다. 본 발명의 실시 예에서는 5개의 압축기(22)를 포함하는 압축부(20)를 예로 들어서 설명하지만 이에 한정된 것은 아니다. 압축부(20)에서 후단으로 갈수록 실린더의 피스톤 링이 마모될 위험이 크기 때문에, 피스톤 링의 마모 방지를 위해 후단의 실린더에 오일(Lubrication oil)를 공급하게 된다. 이때, 4단 이상에서 압축된 증발가스를 분기(C1,C2)시키는 경우, 압축된 증발가스에는 오일이 함유될 수 있다. The compression section 20 may include one or more compressors 22 and a cooler (not shown) arranged alternately with the compressor 22 to cool the evaporated gas whose temperature has risen while being compressed in the compressor 22. In the embodiment of the present invention, the compression unit 20 including five compressors 22 is described as an example, but the present invention is not limited thereto. Lubrication oil is supplied to the cylinder at the rear end in order to prevent wear of the piston ring because there is a great risk that the piston ring of the cylinder wears from the compression section 20 toward the rear end. At this time, when the evaporated gas compressed in four or more stages is branched (C1, C2), the compressed evaporated gas may contain oil.

오일제거부(30)는 저장탱크(10)로부터 공급된 증발가스와 압축부(20)로부터 공급받은 오일이 함유된 압축된 증발가스 간 열교환을 수행하여, 착빙(Icing) 현상에 의해 압축된 증발가스에 함유된 오일을 응고시킨다. 이해를 돕기 위해 예를 들어 착빙 현상이 발생한 부분을 도면에 빗금 처리하여 표시하였다.The oil removing unit 30 performs heat exchange between the evaporating gas supplied from the storage tank 10 and the compressed evaporating gas containing the oil supplied from the compressing unit 20 so that the evaporating gas compressed by the icing phenomenon The oil contained in the gas is solidified. For the sake of understanding, for example, the portion where the icing phenomenon occurred is hatched in the drawing and displayed.

이때, 압축부(20)로부터 공급받은 오일이 함유된 압축된 증발가스는 압축부(20) 및 열교환부(40)를 거친 후 오일제거부(30)에 공급된 것이다. 즉, 해당 오일이 함유된 압축된 증발가스는 오일제거부(30)에 공급되기 이전에 열교환부(40)에서 오일제거부(30)를 거친 저장탱크(10)로부터 공급된 증발가스와 열교환이 이루어진다. 여기서, 오일이 함유된 압축된 증발가스는 열교환부(40)에서 오일이 응고되기 직전까지의 온도로 떨어진 후 오일제거부(30)로 공급되어, 오일제거부(30)에 의해 보다 효과적인 오일 제거가 이루어질 수 있다. At this time, the compressed evaporated gas containing the oil supplied from the compressing unit 20 is supplied to the oil removing unit 30 after passing through the compressing unit 20 and the heat exchanging unit 40. That is, the compressed evaporated gas containing the oil is heat-exchanged with the evaporated gas supplied from the storage tank 10 through the oil removing unit 30 in the heat exchanging unit 40 before being supplied to the oil removing unit 30 . Here, the compressed evaporated gas containing the oil falls to the temperature until the oil coagulates in the heat exchanging unit 40, and then supplied to the oil removing unit 30 so that the oil removing unit 30 can more effectively remove the oil Lt; / RTI >

오일제거부(30)에 의해 오일이 제거된 압축된 증발가스의 기체성분은 제3공급라인(L3)을 통해 열교환부(40)로 공급되고, 액체성분은 회수라인(L4)을 통해 저장탱크(10)로 공급된다. 이와 같이 별도의 오일제거 장치가 없이도 저장탱크로부터 공급된 증발가스와의 열교환에 의해 압축된 증발가스에 함유된 오일이 효과적으로 제거될 수 있다.The gas component of the compressed evaporated gas from which oil has been removed by the oil removing unit 30 is supplied to the heat exchanging unit 40 through the third supply line L3 and the liquid component is supplied to the storage tank L4 via the recovery line L4, (10). Thus, the oil contained in the compressed evaporated gas can be effectively removed by heat exchange with the evaporated gas supplied from the storage tank without a separate oil removing apparatus.

열교환부(40)로 공급된 상술한 오일이 제거된 압축된 증발가스의 기체성분은 오일제거부(30)를 거쳐 열교환부(40)로 공급되는 저장탱크(10)로부터 공급된 증발가스와 열교환이 이루어져 온도가 낮아진다. 열교환부(40)는 예컨대 PCHE(Printed Circuit Heat Exchanger) 등을 포함할 수 있다.The gas component of the compressed evaporated gas supplied to the heat exchanging section 40 from which the oil has been removed is supplied to the heat exchanging section 40 through the oil removing section 30 and the evaporation gas supplied from the storage tank 10, And the temperature is lowered. The heat exchange unit 40 may include a PCHE (Printed Circuit Heat Exchanger) or the like.

그리고, 열교환부(40)를 거친 오일이 제거된 압축된 증발가스의 기체성분은 재액화부(50)에 의해 액화된 이후 제3공급라인(L3)을 통해 저장탱크(10)에 저장된다. 재액화부(50)는 예컨대 감압 팽창시키는 줄-톰슨(Joule Thomson) 밸브 및 액체성분과 기체성분으로 유체를 분리시키고, 액체성분만 저장탱크(10)로 공급하는 기액분리기 등을 포함할 수 있다. The gas component of the compressed evaporated gas from which oil has been removed through the heat exchanging unit 40 is liquefied by the remanufacturing unit 50 and then stored in the storage tank 10 through the third supply line L3. The remanent unit 50 may include, for example, a Joule Thomson valve for decompressing and expanding the liquid, a gas-liquid separator for separating the liquid from the liquid component and the gas component, and supplying only the liquid component to the storage tank 10.

따라서, 열교환부(40), 재액화부(50)에 의해 오일이 제거된 증발가스의 기체성분을 효과적으로 재액화시킬 수 있다. Therefore, the gas component of the evaporated gas from which the oil has been removed by the heat exchanging unit 40 and the remanufacturing unit 50 can be effectively re-liquefied.

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

10: 저장탱크 20: 압축부
30: 오일제거부 40: 열교환부
50: 재액화부
L1~L3: 공급라인 L4: 회수라인10: storage tank 20: compression section
30: Oil removing unit 40: Heat exchange unit
50: Re-
L1 to L3: supply line L4: recovery line

Claims (4)

액화가스 및 상기 액화가스의 증발가스를 저장하는 저장탱크;
상기 저장탱크로부터 공급된 증발가스를 압축시키는 압축부; 및
상기 저장탱크로부터 공급받은 증발가스와 상기 압축부로부터 공급받은 오일이 함유된 압축된 증발가스 간 열교환을 수행하여, 상기 압축된 증발가스에 함유된 오일을 제거하는 오일제거부;를 포함하는 재액화 시스템.A storage tank for storing a liquefied gas and an evaporation gas of the liquefied gas;
A compression unit for compressing the evaporation gas supplied from the storage tank; And
And an oil removing unit for performing heat exchange between the evaporated gas supplied from the storage tank and the compressed evaporated gas containing the oil supplied from the compressed unit to remove the oil contained in the compressed evaporated gas, system. 제1항에 있어서,
상기 오일제거부를 거쳐 오일이 제거된 압축된 증발가스의 기체성분과 상기 압축부를 거쳐 오일이 함유된 압축된 증발가스 각각에 대해 상기 오일제거부를 거친 상기 저장탱크로부터 공급된 증발가스와의 열교환을 수행하는 열교환부와,
상기 열교환부를 거친 오일이 제거된 압축된 증발가스의 기체성분을 재액화시키는 재액화부를 더 포함하는 재액화 시스템.The method according to claim 1,
And performs heat exchange between the gas component of the compressed evaporated gas from which the oil has been removed through the oil removing section and the evaporated gas supplied from the storage tank through the oil removing section to each of the compressed evaporated gas containing oil via the compressed section A heat-
And a re-liquefying unit for re-liquefying the gas component of the compressed evaporated gas from which the oil passed through the heat exchanging unit has been removed. 제2항에 있어서,
상기 저장탱크로부터 공급된 증발가스를 상기 오일제거부, 상기 열교환부 및 상기 압축부를 거쳐 엔진 쪽으로 공급하는 제1공급라인과,
상기 압축부에 의해 적어도 4단 이상의 압축을 거친 지점으로부터 분기되어, 상기 열교환부 및 상기 오일제거부 쪽으로 상기 압축부로부터 공급받은 오일이 함유된 압축된 증발가스를 공급하는 제2공급라인과,
상기 오일제거부에 의해 오일이 제거된 압축된 증발가스의 기체성분이 상기 열교환부 및 상기 재액화부를 거쳐 상기 저장탱크로 공급되도록 하는 제3공급라인을 더 포함하는 재액화 시스템.3. The method of claim 2,
A first supply line for supplying the evaporation gas supplied from the storage tank to the engine via the oil removing unit, the heat exchanging unit and the compression unit,
A second supply line for branching from at least four compression points by the compression unit and supplying compressed evaporation gas containing oil supplied from the compression unit to the heat exchange unit and the oil removal unit;
And a third supply line for allowing a gas component of the compressed evaporated gas from which oil has been removed by the oil removing unit to be supplied to the storage tank through the heat exchanging unit and the re-condensing unit. 제1항에 있어서,
상기 오일제거부를 거쳐 상기 오일이 제거된 압축된 증발가스 액체성분을 상기 저장탱크로 공급하는 회수라인을 더 포함하는 재액화 시스템.The method according to claim 1,
And a recovery line for supplying the compressed vaporized gas liquid component from which the oil has been removed via the oil removal unit to the storage tank.
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