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KR20160068433A - Reliquefaction system, and fuel gas supply system - Google Patents

Reliquefaction system, and fuel gas supply system Download PDF

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KR20160068433A
KR20160068433A KR1020140174196A KR20140174196A KR20160068433A KR 20160068433 A KR20160068433 A KR 20160068433A KR 1020140174196 A KR1020140174196 A KR 1020140174196A KR 20140174196 A KR20140174196 A KR 20140174196A KR 20160068433 A KR20160068433 A KR 20160068433A
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storage tank
gas
liquefied
liquefied gas
supplied
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Korean (ko)
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피석훈
이호기
이동길
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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
    • F02M21/0215—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
    • 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
    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases 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
    • 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
    • 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
    • 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)
  • 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

재액화 시스템 및 연료가스 공급시스템을 개시한다. 본 발명의 실시 예에 따른 재액화 시스템은 제1액화가스를 저장하는 제1저장탱크; 제1액화가스보다 액화점이 높은 제2액화가스를 저장하는 제2저장탱크; 및 제1저장탱크로부터 공급받은 제1액화가스 증발가스와 제2저장탱크로부터 공급받은 제2액화가스 증발가스 간 열교환이 수행되도록 하는 열교환부;를 포함한다.A re-liquefaction system and a fuel gas supply system. The re-liquefaction system according to an embodiment of the present invention includes a first storage tank for storing a first liquefied gas; A second storage tank for storing a second liquefied gas having a higher liquefaction point than the first liquefied gas; And a heat exchange unit for performing heat exchange between the first liquefied gas evaporated gas supplied from the first storage tank and the second liquefied gas evaporated gas supplied from the second storage tank.

Description

재액화 시스템 및 연료가스 공급시스템{RELIQUEFACTION SYSTEM, AND FUEL GAS SUPPLY SYSTEM}BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a re-liquefaction system and a fuel gas supply system,

본 발명은 재액화 시스템 및 연료가스 공급시스템에 관한 것이다.The present invention relates to a refueling system and a fuel gas supply system.

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

선박은 저장탱크로부터 공급받은 LNG 증발가스(BOG, Boil-Off Gas) 또는 LNG의 압력, 온도, 상태 등을 변환하여 엔진으로 공급하는 연료가스 공급시스템을 구비할 수 있다. 여기서, 선박은 둘 이상의 이종연료를 연료로서 사용하는 DFDE(Dual Fuel Disel Electric) 엔진과 같은 저압가스 분사엔진과 ME-GI 엔진(Man B&W 사의 Gas Injection 엔진)과 같은 고압가스 분사엔진 등을 포함할 수 있다. 예컨대, 한국공개특허 제10-2008-0103500호(2008. 11. 27. 공개)는 ME-GI 엔진과 같은 고압가스 분사엔진으로 연료를 공급할 수 있는 연료가스 공급시스템을 제시한 바 있다. 이 시스템은 LNG 연료탱크로부터 LNG를 빼내어 고압으로 압축한 후 이를 기화시켜서 고압가스 분사엔진으로 공급한다. 이외에도 저장탱크로부터 공급받은 LNG 증발가스를 다단의 압축기에서 공급조건에 맞도록 압축한 후 엔진으로 공급하거나 재액화하여 저장하는 등의 다양한 연료가스 공급시스템이 공지된 바 있다.The ship may be provided with a fuel gas supply system for converting the pressure, temperature, state, etc. of LNG vapor (BOG, Boil-Off Gas) or LNG supplied from the storage tank to the engine. Here, the vessel includes a low pressure gas injection engine such as a Dual Fuel Disel Electric (DFDE) engine using two or more different kinds of fuel as a fuel, and a high pressure gas injection engine such as an ME-GI engine (Man B & W's Gas Injection Engine) . For example, Korean Patent Laid-Open No. 10-2008-0103500 (published on November 27, 2008) has proposed a fuel gas supply system capable of supplying fuel to a high-pressure gas injection engine such as an ME-GI engine. The system extracts LNG from the LNG fuel tank, compresses it to high pressure, vaporizes it, and supplies it to the high-pressure gas injection engine. In addition, a variety of fuel gas supply systems have been known, such as compressing the LNG vapor supplied from the storage tank to meet the supply conditions in a multi-stage compressor, supplying it to the engine, or storing the liquefied gas.

그러나, 상술한 바와 같이 종래에는 LNG 증발가스를 엔진으로 공급하거나 재액화하여 저장하는 등에 대한 시스템 개발은 활발하게 이루어진 반면, 액화에탄을 저장 및 수송하는 선박에서 액화에탄 증발가스를 효과적으로 활용하고 재액화할 수 있는 시스템은 미흡한 실정이다.However, as described above, conventionally, systems have been actively developed for supplying LNG evaporation gas to an engine or storing liquefied liquefied gas, and the like. On the other hand, in a ship storing and transporting liquefied ethane, The system that can do is not enough.

한국공개특허 제10-2008-0103500호(2008. 11. 27. 공개)Korean Patent Laid-Open No. 10-2008-0103500 (published on November 27, 2008)

본 발명의 실시 예는 액화에탄을 운반하는 과정에서 발생하는 액화에탄 증발가스를 효과적으로 활용하고 이를 재액화시켜 저장탱크에 저장할 수 있는 재액화 시스템 및 연료가스 공급시스템을 제공하고자 한다.An embodiment of the present invention is to provide a re-liquefaction system and a fuel gas supply system that can effectively utilize the liquefied ethane gas generated in the process of transporting liquefied ethane and store it in a storage tank.

또, 액화에탄 증발가스와 열교환이 수행된 LNG 증발가스를 엔진의 연료가스로 공급할 수 있는 재액화 시스템 및 연료가스 공급시스템을 제공하고자 한다.It is another object of the present invention to provide a re-liquefaction system and a fuel gas supply system capable of supplying an LNG vaporized gas subjected to heat exchange with liquefied ethane gas to a fuel gas of an engine.

본 발명의 일 측면에 따르면, 제1액화가스를 저장하는 제1저장탱크; 상기 제1액화가스보다 액화점이 높은 제2액화가스를 저장하는 제2저장탱크; 및 상기 제1저장탱크로부터 공급받은 제1액화가스 증발가스와 상기 제2저장탱크로부터 공급받은 제2액화가스 증발가스 간 열교환을 수행하는 열교환부;를 포함하는 재액화 시스템이 제공될 수 있다.According to an aspect of the present invention, there is provided a liquid storage tank comprising: a first storage tank for storing a first liquefied gas; A second storage tank for storing a second liquefied gas having a higher liquefaction point than the first liquefied gas; And a heat exchange unit for performing heat exchange between the first liquefied gas evaporated gas supplied from the first storage tank and the second liquefied gas evaporated gas supplied from the second storage tank.

상기 제1저장탱크로부터 공급된 제1액화가스 증발가스가 상기 열교환부를 거쳐 엔진 쪽으로 공급되도록 하는 제1공급라인과, 상기 제2저장탱크로부터 공급된 제2액화가스 증발가스가 상기 열교환부를 거쳐 상기 제2저장탱크에 저장되도록 하는 제2공급라인을 더 포함할 수 있다.A first supply line through which the first liquefied gas evaporated gas supplied from the first storage tank is supplied to the engine via the heat exchanging unit and a second supply line supplied from the second storage tank through the heat exchanging unit, And a second supply line adapted to be stored in a second storage tank.

상기 제1액화가스는 액화천연가스이고, 상기 제2액화가스는 액화에탄일 수 있다.The first liquefied gas may be liquefied natural gas and the second liquefied gas may be liquefied ethane.

본 발명의 다른 측면에 따르면, 제1액화가스를 저장하는 제1저장탱크; 상기 제1액화가스보다 액화점이 높은 제2액화가스를 저장하는 제2저장탱크; 상기 제1저장탱크로부터 공급받은 제1액화가스 증발가스와 상기 제2저장탱크로부터 공급받은 제2액화가스 증발가스 간 열교환을 수행하는 제1열교환부; 및 상기 제1열교환부를 거친 제2액화가스 증발가스와 상기 제1저장탱크로부터 공급된 제1액화가스 간 열교환을 수행하는 제2열교환부;를 포함하되, 상기 제1열교환부를 거친 제1액화가스 증발가스와 상기 제2열교환부를 거친 제1액화가스는 혼합되어 엔진 쪽으로 공급되는 연료가스 공급시스템이 제공될 수 있다.According to another aspect of the present invention, there is provided a liquid storage tank comprising: a first storage tank for storing a first liquefied gas; A second storage tank for storing a second liquefied gas having a higher liquefaction point than the first liquefied gas; A first heat exchanger for performing heat exchange between the first liquefied gas evaporated gas supplied from the first storage tank and the second liquefied gas evaporated gas supplied from the second storage tank; And a second heat exchanger for performing heat exchange between the second liquefied gas evaporated gas passed through the first heat exchanger and the first liquefied gas supplied from the first storage tank, wherein the first liquefied gas passing through the first heat exchanger The evaporation gas and the first liquefied gas passing through the second heat exchange section may be mixed and supplied to the engine.

상기 제1저장탱크로부터 공급된 제1액화가스 증발가스가 상기 제1열교환부를 거쳐 엔진 쪽으로 공급되도록 하는 제1공급라인과, 상기 제2저장탱크로부터 공급된 제2액화가스 증발가스가 상기 제1열교환부와 상기 제2열교환부를 거쳐 상기 제2저장탱크에 저장되도록 하는 제2공급라인과, 상기 제2열교환부를 거친 상기 제1저장탱크로부터 공급된 제1액화가스가 상기 제1열교환부를 거친 상기 제1저장탱크로부터 공급된 제1액화가스 증발가스와 혼합되도록, 상기 제1저장탱크와 상기 제2열교환부 및 상기 제1열교환부 후단의 상기 제1공급라인을 연결하는 제3공급라인을 더 포함할 수 있다.A first supply line through which the first liquefied gas evaporated gas supplied from the first storage tank is supplied to the engine via the first heat exchanger; A second supply line through which the first liquefied gas is supplied from the first storage tank through the second heat exchange unit to the second storage tank through the heat exchange unit and the second heat exchange unit; And a third supply line connecting the first storage tank and the second heat exchange unit and the first supply line at the rear end of the first heat exchange unit so as to be mixed with the first liquefied gas evaporated gas supplied from the first storage tank .

본 발명의 실시 예에 따른 재액화 시스템 및 연료가스 공급시스템은 액화에탄을 운반하는 과정에서 발생하는 액화에탄 증발가스를 효과적으로 활용하고 이를 재액화시켜 저장탱크에 저장할 수 있다.The re-liquefaction system and the fuel gas supply system according to the embodiment of the present invention can efficiently utilize the liquefied ethane gas generated in the process of transporting liquefied ethane, and re-liquefy the liquefied ethane gas to store it in the storage tank.

또, 액화에탄 증발가스와 열교환이 수행된 LNG 증발가스를 엔진의 연료가스로 공급할 수 있다.In addition, the LNG vaporized gas subjected to the heat exchange with the liquefied methane gas can be supplied to the fuel gas of the engine.

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

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

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

도 1을 참조하면, 본 발명의 일 실시 예에 따른 재액화 시스템(100)은 액화에탄을 운반하는 과정에서 발생하는 액화에탄 증발가스를 효과적으로 재액화시킬 수 있다. 재액화 시스템(100)은 액화에탄을 수송하는 선박에 설치될 수 있다. Referring to FIG. 1, the re-liquefaction system 100 according to an embodiment of the present invention can effectively re-liquefy the liquefied ethane gas generated in the process of transporting liquefied ethane. The re-liquefaction system 100 may be installed in a vessel that transports liquefied ethane.

또, 재액화 시스템(100)은 각종 액화연료 운반선, 액화연료 RV(Regasification Vessel), 컨테이너선, 일반상선, LNG FPSO(Floating, Production, Storage and Off-loading), LNG FSRU(Floating Storage and Regasification Unit) 등을 포함하는 선박에 적용될 수 있다. In addition, the re-liquefaction system 100 includes various liquefied fuel carriers, regasification vessels, container ships, general merchant ships, LNG FPSO (Floating, Production, Storage and Off-loading), LNG FSRU ) And the like.

이러한 재액화 시스템(100)은 제1저장탱크(110), 제2저장탱크(120), 및 제1열교환부(131)를 포함한다.The re-liquefaction system 100 includes a first storage tank 110, a second storage tank 120, and a first heat exchange unit 131.

제1저장탱크(110)는 LNG(C1)를 저장하며, 제1공급라인(L1)을 통해 LNG(C1) 증발가스를 제1열교환부(131)로 보낸다. 제1공급라인(L1)은 제1저장탱크(110)로부터 공급된 LNG(C1) 증발가스가 제1열교환부(131)를 거쳐 엔진(150) 쪽으로 공급되도록 한다.The first storage tank 110 stores the LNG C1 and sends the LNG C1 vapor to the first heat exchanger 131 through the first supply line L1. The first supply line L1 allows the LNG (C1) evaporated gas supplied from the first storage tank 110 to be supplied to the engine 150 via the first heat exchanging unit 131. [

제2저장탱크(120)는 복수 개로 마련될 수 있으며, LNG(C1)보다 액화점이 높은 액화에탄(C2)를 저장한다. 제2저장탱크(120)는 제2공급라인(L2)을 통해 액화에탄(C2) 증발가스를 제1열교환부(131)로 보낸다. 제2저장탱크(120)는 예컨대 멤브레인형 탱크, SPB형 탱크를 포함할 수 있다. 제2공급라인(L2)은 제2저장탱크(120)로부터 공급된 액화에탄(C2) 증발가스가 제1열교환부(131)를 거쳐 제2저장탱크(120)에 저장되도록 한다.A plurality of second storage tanks 120 may be provided to store the liquefied C2 having a higher liquefaction point than the LNG C1. The second storage tank 120 sends the liquefied ethanol (C2) evaporated gas to the first heat exchanger 131 through the second supply line L2. The second storage tank 120 may include, for example, a membrane type tank, an SPB type tank. The second supply line L2 allows the liquefied ethane (C2) evaporated gas supplied from the second storage tank 120 to be stored in the second storage tank 120 via the first heat exchange unit 131. [

제1열교환부(131)는 제1저장탱크(110)로부터 공급받은 LNG(C1) 증발가스를 제2저장탱크(120)로부터 공급받은 액화에탄(C2) 증발가스와 열교환시킨다. LNG(C1) 증발가스와의 열교환에 의해 액화에탄(C2) 증발가스의 액화가 이루어진다.The first heat exchanging unit 131 exchanges the LNG (C1) evaporated gas supplied from the first storage tank 110 with the evaporated gas of the liquefied ethanol (C2) supplied from the second storage tank 120. Liquefaction of liquefied ethane (C2) vapor is carried out by heat exchange with LNG (C1) evaporation gas.

이하, 상술한 내용을 기초로 액화에탄 증발가스 재액화 과정에 대해서 설명한다.Hereinafter, the liquefaction process of liquefied ethane-evaporated gas will be described on the basis of the above-mentioned contents.

먼저, 제1저장탱크(110)로부터 제1공급라인(L1)을 통해 공급된 LNG(C1) 증발가스와 제2저장탱크(120)로부터 제2공급라인(L2)을 통해 공급된 액화에탄(C2) 증발가스 간 제1열교환부(131)에 의해 열교환이 수행된다.First, the LNG (C1) evaporated gas supplied from the first storage tank 110 through the first supply line L1 and the liquefied ethane supplied from the second storage tank 120 through the second supply line L2 C2) evaporation gas is carried out by the first heat exchanging unit 131. [

다음으로, 제2저장탱크(120)로부터 공급된 액화에탄(C2) 증발가스는 제1열교환부(131)를 거쳐 액화된 상태에서 제2저장탱크(120)에 저장된다.Next, the liquefied ethanol (C2) evaporated gas supplied from the second storage tank 120 is stored in the second storage tank 120 in a liquefied state through the first heat exchanging unit 131. [

이하, 도 2를 기초로 본 발명의 다른 실시 예에 따른 재액화 시스템(100)에 대해서 설명한다. 다만 상술한 내용과 중복되는 내용은 되도록 생략한다.Hereinafter, the re-liquefaction system 100 according to another embodiment of the present invention will be described with reference to FIG. However, the contents overlapping with the above contents are omitted.

도 2를 참조하면, 본 발명의 다른 실시 예에 따른 재액화 시스템(100)은 제1열교환부(131)를 거친 제2저장탱크(120)로부터 공급된 액화에탄(C2) 증발가스와 제1저장탱크(110)로부터 공급된 LNG(C1) 간 열교환이 수행되도록 하는 제2열교환부(132)를 더 포함할 수 있다. 이때, 상술한 제2공급라인(L2)은 제2저장탱크(120)로부터 공급된 액화에탄(C2) 증발가스가 제1열교환부(131)와 제2열교환부(132)를 거쳐 제2저장탱크(120)에 저장되도록 한다.Referring to FIG. 2, the re-liquefaction system 100 according to another embodiment of the present invention includes a liquefied methane (C2) evaporated gas supplied from the second storage tank 120 through the first heat exchanger 131, And a second heat exchange unit 132 for performing heat exchange between the LNGs C1 supplied from the storage tank 110. At this time, the second supply line L2 is connected to the second storage tank 120 through the first heat exchanging unit 131 and the second heat exchanging unit 132, And stored in the tank 120.

제1열교환부(131)를 거친 LNG(C1) 증발가스와 제2열교환부(132)를 거친 LNG(C1)는 혼합되어 엔진(150) 쪽으로 공급된다. 이를 위해 제2열교환부(132)를 거친 제1저장탱크(110)로부터 공급된 LNG(C1)가 제1열교환부(131)를 거친 LNG(C1) 증발가스와 혼합되도록, 제1저장탱크(110)와 제2열교환부(132) 및 제1열교환부(131) 후단의 제1공급라인(L31)을 연결하는 제3공급라인(L3)이 마련될 수 있다.The LNG (C1) evaporated gas passing through the first heat exchanging unit 131 and the LNG (C1) passing through the second heat exchanging unit 132 are mixed and supplied to the engine 150. The LNG supplied from the first storage tank 110 through the second heat exchanger 132 is mixed with the LNG C1 evaporated gas through the first heat exchanger 131, A third supply line L3 may be provided to connect the first heat exchange unit 110 with the second heat exchange unit 132 and the first supply line L31 at the rear end of the first heat exchange unit 131. [

제2열교환부(132) 전단의 제3공급라인(L3)에는 제어밸브(140)가 마련될 수 있다. 제어밸브(140)는 엔진(150)의 연료가스 공급조건에 따라 개폐될 수 있다. 예컨대, 제1열교환부(131)를 거쳐 엔진(15) 쪽으로 공급되는 LNG(C1) 증발가스의 양이 부족한 경우, 제어밸브(140) 개방에 의해 제1저장탱크(110)로부터 LNG(C1)가 추가로 공급될 수 있다. 제2열교환부(132)를 거친 제1저장탱크(110)로부터 공급된 LNG(C1)는 제1열교환부(131)를 거친 제1저장탱크(110)로부터 공급된 LNG(C1) 증발가스와 혼합되어 엔진(150) 쪽으로 공급될 수 있다. A control valve 140 may be provided on the third supply line L3 on the upstream side of the second heat exchanging unit 132. The control valve 140 may be opened or closed according to the fuel gas supply condition of the engine 150. For example, when the amount of the LNG (C1) evaporated gas supplied to the engine 15 through the first heat exchanging unit 131 is insufficient, the LNG C1 is discharged from the first storage tank 110 by opening the control valve 140, May be additionally supplied. The LNG supplied from the first storage tank 110 through the second heat exchanging unit 132 is supplied to the LNG evaporating gas supplied from the first storage tank 110 through the first heat exchanging unit 131 Can be mixed and supplied to the engine 150.

상술한 엔진(150)은 저압, 중압 또는 고압가스 분사엔진을 포함할 수 있다. 저압가스 분사엔진은 대략 5 내지 7bar 정도의 연료가스를 이용하는 것으로 DFDE 엔진과 같은 발전용 엔진을 포함한다. 저압가스 분사엔진은 천연가스뿐 아니라 중유(HFO, Heavy Fuel Oil) 등을 연료로 이용할 수 있는 이중연료엔진일 수 있다. 중압가스 분사엔진은 대략 16 내지 45bar 정도의 연료가스를 이용한다. 고압가스 분사엔진은 대략 150 내지 300bar 정도의 연료가스를 이용하는 것으로 ME-GI 엔진을 포함한다. 도시하지는 않았지만, 엔진의 연료가스 공급조건에 맞게 혼합된 증발가스의 온도, 압력, 상태 등을 조절하는 장치들이 마련될 수 있다. The engine 150 described above may include a low pressure, medium pressure or high pressure gas injection engine. The low pressure gas injection engine uses a fuel gas of about 5 to 7 bar and includes a power generation engine such as a DFDE engine. The low-pressure gas injection engine may be a dual fuel engine that can use not only natural gas but also heavy oil (HFO) as fuel. The medium pressure gas injection engine uses approximately 16 to 45 bar of fuel gas. The high-pressure gas injection engine includes the ME-GI engine using approximately 150 to 300 bar of fuel gas. Although not shown, devices for adjusting the temperature, pressure, state, etc. of the evaporated gas mixed with the fuel gas supply conditions of the engine may be provided.

예컨대, 엔진(150)이 DFDE 엔진과 같은 저압가스 분사엔진일 경우, 유체를 기화시키는 기화기, 기화기를 거친 유체를 저압가스 분사엔진의 연료가스 공급압력으로 조절하는 압력밸브, 압력밸브를 거친 유체를 저압가스 분사엔진의 요구 온도에 맞게 온도를 보정하는 히터 등의 장치들이 구비될 수 있다. For example, when the engine 150 is a low-pressure gas injection engine such as a DFDE engine, a vaporizer for vaporizing the fluid, a pressure valve for regulating the fluid passing through the vaporizer to the fuel gas supply pressure of the low-pressure gas injection engine, And a heater for correcting the temperature to meet the required temperature of the low-pressure gas injection engine.

엔진(150)이 중압가스 분사엔진인 경우, 유체의 압력을 조절하는 조절밸브, 히터 등의 장치들이 구비될 수 있다. When the engine 150 is a medium pressure gas injection engine, devices such as a regulating valve, a heater, etc. for regulating the pressure of the fluid may be provided.

엔진(150)이 ME-GI 엔진과 같은 고압가스 분사엔진일 경우, 고압가스 분사엔진의 연료가스 공급압력에 따라 유체를 가압 송출하는 고압펌프와, 가압된 유체를 기화시키는 고압기화기 등과 같은 장치들이 구비될 수 있다.When the engine 150 is a high-pressure gas injection engine such as an ME-GI engine, devices such as a high-pressure pump for pressurizing and discharging the fluid in accordance with the fuel gas supply pressure of the high-pressure gas injection engine, and a high-pressure vaporizer for vaporizing the pressurized fluid .

상술한 실시 예에서는 LNG(C1)와 액화에탄(C2)을 예로 들어 설명하였으나, 이에 한정되는 것은 아니며, 예컨대, 액화석유가스, 액화프로판, 액화부탄 등이 액화에탄(C2) 대신 사용될 수 있다. 또 이들보다 액화점이 낮은 모든 액화가스가 LNG(C1) 대신 사용될 수 있다.The liquefied petroleum gas, liquefied propane, liquefied butane, etc., may be used instead of the liquefied methane (C2). Moreover, all the liquefied gas having lower liquefaction point than these can be used instead of the LNG (C1).

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.

110: 제1저장탱크 120: 제2저장탱크
131,132: 열교환부 140: 제어밸브
150: 엔진 L1: 제1공급라인
L2: 제2공급라인 L3: 제3공급라인110: first storage tank 120: second storage tank
131, 132: heat exchanger 140: control valve
150: engine L1: first supply line
L2: second supply line L3: third supply line

Claims (5)

제1액화가스를 저장하는 제1저장탱크;
상기 제1액화가스보다 액화점이 높은 제2액화가스를 저장하는 제2저장탱크; 및
상기 제1저장탱크로부터 공급받은 제1액화가스 증발가스와 상기 제2저장탱크로부터 공급받은 제2액화가스 증발가스 간 열교환을 수행하는 열교환부;를 포함하는 재액화 시스템.A first storage tank for storing the first liquefied gas;
A second storage tank for storing a second liquefied gas having a higher liquefaction point than the first liquefied gas; And
And a heat exchange unit for performing heat exchange between the first liquefied gas evaporated gas supplied from the first storage tank and the second liquefied gas evaporated gas supplied from the second storage tank. 제1항에 있어서,
상기 제1저장탱크로부터 공급된 제1액화가스 증발가스가 상기 열교환부를 거쳐 엔진 쪽으로 공급되도록 하는 제1공급라인과,
상기 제2저장탱크로부터 공급된 제2액화가스 증발가스가 상기 열교환부를 거쳐 상기 제2저장탱크에 저장되도록 하는 제2공급라인을 더 포함하는 재액화 시스템.The method according to claim 1,
A first supply line through which the first liquefied gas evaporated gas supplied from the first storage tank is supplied to the engine via the heat exchange unit,
And a second supply line for allowing the second liquefied gas evaporated gas supplied from the second storage tank to be stored in the second storage tank through the heat exchange unit. 제1항에 있어서,
상기 제1액화가스는 액화천연가스이고, 상기 제2액화가스는 액화에탄인 재액화 시스템.The method according to claim 1,
Wherein the first liquefied gas is liquefied natural gas and the second liquefied gas is liquefied ethane. 제1액화가스를 저장하는 제1저장탱크;
상기 제1액화가스보다 액화점이 높은 제2액화가스를 저장하는 제2저장탱크;
상기 제1저장탱크로부터 공급받은 제1액화가스 증발가스와 상기 제2저장탱크로부터 공급받은 제2액화가스 증발가스 간 열교환을 수행하는 제1열교환부; 및
상기 제1열교환부를 거친 제2액화가스 증발가스와 상기 제1저장탱크로부터 공급된 제1액화가스 간 열교환을 수행하는 제2열교환부;를 포함하되,
상기 제1열교환부를 거친 제1액화가스 증발가스와 상기 제2열교환부를 거친 제1액화가스는 혼합되어 엔진 쪽으로 공급되는 연료가스 공급시스템.A first storage tank for storing the first liquefied gas;
A second storage tank for storing a second liquefied gas having a higher liquefaction point than the first liquefied gas;
A first heat exchanger for performing heat exchange between the first liquefied gas evaporated gas supplied from the first storage tank and the second liquefied gas evaporated gas supplied from the second storage tank; And
And a second heat exchanger for performing heat exchange between the second liquefied gas evaporated gas passed through the first heat exchanger and the first liquefied gas supplied from the first storage tank,
Wherein the first liquefied gas evaporated gas passed through the first heat exchanger and the first liquefied gas passed through the second heat exchanger are mixed and supplied to the engine. 제4항에 있어서,
상기 제1저장탱크로부터 공급된 제1액화가스 증발가스가 상기 제1열교환부를 거쳐 엔진 쪽으로 공급되도록 하는 제1공급라인과,
상기 제2저장탱크로부터 공급된 제2액화가스 증발가스가 상기 제1열교환부와 상기 제2열교환부를 거쳐 상기 제2저장탱크에 저장되도록 하는 제2공급라인과,
상기 제2열교환부를 거친 상기 제1저장탱크로부터 공급된 제1액화가스가 상기 제1열교환부를 거친 상기 제1저장탱크로부터 공급된 제1액화가스 증발가스와 혼합되도록, 상기 제1저장탱크와 상기 제2열교환부 및 상기 제1열교환부 후단의 상기 제1공급라인을 연결하는 제3공급라인을 더 포함하는 연료가스 공급시스템.5. The method of claim 4,
A first supply line for supplying the first liquefied gas evaporated gas supplied from the first storage tank to the engine via the first heat exchanger,
A second supply line for allowing the second liquefied gas evaporated gas supplied from the second storage tank to be stored in the second storage tank through the first heat exchanger and the second heat exchanger,
The first liquefied gas supplied from the first storage tank through the second heat exchanger is mixed with the first liquefied gas evaporated gas supplied from the first storage tank through the first heat exchanger, Further comprising a third supply line connecting the second heat exchange unit and the first supply line at a rear end of the first heat exchange unit.
KR1020140174196A 2014-12-05 2014-12-05 Reliquefaction system, and fuel gas supply system Ceased KR20160068433A (en)

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Citations (1)

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Publication number Priority date Publication date Assignee Title
KR20080103500A (en) 2007-05-08 2008-11-27 대우조선해양 주식회사 Fuel gas supply system and method of ship

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080103500A (en) 2007-05-08 2008-11-27 대우조선해양 주식회사 Fuel gas supply system and method of ship

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