KR20090059763A - Regasification system of lngc - Google Patents

Regasification system of lngc Download PDF

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Publication number
KR20090059763A
KR20090059763A KR1020070126796A KR20070126796A KR20090059763A KR 20090059763 A KR20090059763 A KR 20090059763A KR 1020070126796 A KR1020070126796 A KR 1020070126796A KR 20070126796 A KR20070126796 A KR 20070126796A KR 20090059763 A KR20090059763 A KR 20090059763A
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South Korea
Prior art keywords
heat exchanger
natural gas
boiler
pipe
liquefied natural
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KR1020070126796A
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Korean (ko)
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권오근
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삼성중공업 주식회사
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Priority to KR1020070126796A priority Critical patent/KR20090059763A/en
Publication of KR20090059763A publication Critical patent/KR20090059763A/en

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    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures
    • B63B27/34—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures using pipe-lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D9/00—Apparatus or devices for transferring liquids when loading or unloading ships
    • B67D9/02—Apparatus or devices for transferring liquids when loading or unloading ships using articulated pipes
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, 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
    • F17C2227/03—Heat exchange with the 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
    • F17C2265/05—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
    • 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

Abstract

A regasification system of an LNG carrier is provided to use high temperature waste gas of the boiler to heat the condensed water produced by heat exchange with glycol water and return the heated condensed water to the boiler, thereby reducing fuel consumption of the boiler. A regasification system of an LNG carrier is comprised of first to third heat exchangers(110~130) and a waste gas pipe(140). The first heat exchanger is installed on a first pipe(112) to transport LNG in a reservoir of the LNG carrier to a land terminal. The second heat exchanger is installed on a second pipe(122) through which high temperature steam supplied from a boiler(100) of the LNG carrier passes. The third heat exchanger is installed on a third pipe(132) which is extended from the second heat exchanger and connected to the boiler. The waste gas pipe, through which the waste gas exhausted from the boiler passes, is extended from the boiler and positioned through the third heat exchanger so that the condensed water which is heat-exchanged with glycol water in the second heat exchanger and flows through the third pipe is heat-exchanged with the waste gas.

Description

액화천연가스운반선의 재기화 시스템{REGASIFICATION SYSTEM OF LNGC}Regasification system of liquefied natural gas carrier {REGASIFICATION SYSTEM OF LNGC}

본 발명은 액화천연가스운반선의 재기화 시스템에 관한 것으로, 더욱 상세하게는 글리콜 워터와 응축스팀이 열교환기를 통과하여 선박내에 저장된 액화천연가스를 천연가스로 재기화시키는 액화천연가스운반선의 재기화 시스템에 관한 것이다.The present invention relates to a regasification system of a liquefied natural gas carrier, and more particularly, to a regasification system of a liquefied natural gas carrier, in which glycol water and a condensation steam pass through a heat exchanger to regasify liquefied natural gas stored in a vessel into natural gas. It is about.

전 세계에 분포된 천연가스 생산지에서는 많은 양의 천연가스(주로 메탄)가 생산된다. 이렇게 생산된 천연가스가 생산지에서 소비지까지 손쉽게 운반될 수 있다면, 그러한 가치는 에너지부족을 염려하는 현재 실정에서 매우 높은 가치를 가지게될 것이다. 만일 천연가스의 생산지가 소비지와 인접해 있다면, 이러한 천연가스의 운반은 수중 또는 지상의 파이프를 이용하여 가능해 질 것이다. 그러나 천연가스의 생산지가 소비지와 원거리 상에 존재한다면, 이러한 천연가스의 운반을 위해 별도의 운송방법을 도입해야 한다.Natural gas producing regions around the world produce a large amount of natural gas (mainly methane). If the natural gas thus produced could be easily transported from place of production to place of consumption, such value would be of very high value in the current context of energy shortages. If the natural gas production site is adjacent to the consumer, this transport of natural gas will be possible by underwater or above-ground pipes. However, if the natural gas production site is far from the consumer, a separate transportation method should be introduced for the transport of such natural gas.

일반적으로 원격지에서 생산된 천연가스를 소비지로 운송하는 방법으로는 선박을 이용하는 것이 보편적인데, 생산지 또는 그 인접지역에서 생산된 천연가스를 먼저 액화시킨 후, 이러한 액화상태의 천연가스 즉, 액화천연가스(LNG; Liquefied Natural Gas)를 선박에 저장하여 운반시키는 것이다. 이때의 액화천연가스는 천연가스를 고압 및 극저온(대략 -160℃)상태에서 액화시킨 것인데, 이러한 액화천연가스의 특성 때문에 많은 양을 한꺼번에 선박의 저장탱크에 실어 운반할 수 있는 장점이 있다.In general, a method of transporting a natural gas produced at a remote location to a consumer is commonly used by a ship. The natural gas produced at the production site or its neighbors is first liquefied, and then the natural gas in the liquefied state, that is, natural gas Liquefied Natural Gas (LNG) is stored and transported in ships. At this time, the liquefied natural gas is to liquefy natural gas at high pressure and cryogenic temperature (about -160 ℃), because of the characteristics of the liquefied natural gas has the advantage that can be transported in a storage tank of the vessel at a time.

그러나 이러한 천연가스의 액화상태로의 변환으로 인하여, 선박이 상기 액화천연가스를 운반목적지, 즉 소비지까지 운반한 후 이를 다시 천연가스로 재기화(Regasification)시켜야 하는 어려움이 나타났다. 만일 천연가스에 대한 시장이 잘 형성되어 있으며, 수요가 안정적으로 증가하는 곳이라면, 소비지에 영구적 시설물인 육상 액화천연가스 재기화시설을 건설하는 것이 좋다. 그러나 이와 달리 일시적인 요인 또는 계절 또는 주기별로 천연가스가 필요한 지역에서는 이러한 영구적 시설물을 건설하는 것 자체가 경제성에 합당치 못한 것이 자명하다.However, due to the conversion of the natural gas to the liquefied state, it has been difficult for the ship to transport the liquefied natural gas to a destination, that is, a consumption place, and then regasify it to natural gas. If the market for natural gas is well established and demand is stable, it is advisable to construct a land liquefied natural gas regasification facility at the consumer site. However, in the case where natural gas is needed for temporary factors or seasons or cycles, it is obvious that the construction of such permanent facilities is not economically feasible.

최근, 액화천연가스 운반선에서 저장된 액화천연가스를 육상터미널로 하역하기 전에 미리 재기화 시킬 수 있는 선박의 재기화 설비들이 제안되고 있다.Recently, vessel regasification facilities have been proposed that can regasify liquefied natural gas stored in liquefied natural gas carriers before unloading them to the land terminal.

이에 따라 종래에는 해수를 이용한 선박의 재기화 설비가 개발되어 이용되어 왔으나, 상온의 해수 혹은 가열된 해수를 이용하여 액화천연가스를 재기화시키는데, 이러한 재기화과정을 수행한 후 배출되는 해수는 상온보다 낮은 온도를 가지며, 배관 상에 부착된 각종 부식물과 함께 배출되므로, 해양 생태계 및 환경 오염을 초래할 수 있는 문제점이 있었다.Accordingly, the regasification facilities of ships using seawater have been developed and used in the prior art, but liquefied natural gas is regasified using seawater or heated seawater at room temperature, and the seawater discharged after performing this regasification process is room temperature. It has a lower temperature and is discharged with various corrosive materials attached to the pipe, there was a problem that can cause marine ecosystem and environmental pollution.

따라서 이러한 종래의 해수를 이용하던 선박의 재기화 설비의 문제점을 다소나마 보완하려는 노력의 일환으로, 해수를 매개하지 않고 직접 스팀과 열교환시키 는 선박의 재기화 설비가 출현하였다. 종래 기술에 따른 스팀 열교환을 이용한 선박의 재기화 설비를 도 1을 참고하여 설명하면 다음과 같다.Therefore, as part of an effort to partially compensate for the problems of the vessel regasification equipment using the conventional seawater, the regasification equipment of the vessel that directly heat-exchanges with steam without mediating seawater has emerged. Referring to Figure 1 re-gasification of the vessel using the steam heat exchange according to the prior art as follows.

저장탱크(미도시)에서 육상터미널(미도시)로 액화천연가스(LNG)를 운반하는 배관 상에 제 1 열교환기(10)를 장착하고, 선박의 보일러(30)로부터 공급되는 고온의 스팀 배관 상에 제 2 열교환기(20)를 장착하였다.The first heat exchanger 10 is mounted on a pipe that carries liquefied natural gas (LNG) from a storage tank (not shown) to a land terminal (not shown), and the high temperature steam pipe is supplied from the boiler 30 of the vessel. The second heat exchanger 20 was mounted on the bed.

그리고 제 1 열교환기(10)와 제 2 열교환기(20)를 순환하는 배관을 따라 글리콘 워터가 순환함으로써 보일러(30)로부터 공급된 고온의 스팀과 극저온의 상기 액화천연가스가 글리콜 워터를 매개로 하여 열교환될 수 있게 되어 있다. In addition, the glycon water circulates along the pipe circulating the first heat exchanger 10 and the second heat exchanger 20 so that the high temperature steam supplied from the boiler 30 and the cryogenic liquefied natural gas mediate glycol water. It is possible to exchange heat.

이로 인하여, 해수를 매개로 하지 않고서 공급 및 회수되는 스팀을 이용하여 액화천연가스를 기화시켜 천연가스의 형태로 육상 터미널에 하역할 수 있게 된다.Accordingly, the natural gas can be vaporized using steam supplied and recovered without using seawater as a natural gas, and thus can be unloaded to the land terminal in the form of natural gas.

그러나, 이러한 종래 기술에 따른 직접 스팀 열교환을 이용한 선박의 재기화 설비에서는 보일러에서 배출되는 고온의 배기가스를 대기중에 배출하여 환경 오염의 원인이 되는 문제점이 있었다.However, in the regasification facility of the ship using the direct steam heat exchange according to the prior art there is a problem that causes the environmental pollution by discharging the high-temperature exhaust gas discharged from the boiler to the atmosphere.

따라서 본 발명에서는, 보일러로부터 배출되는 고온의 폐가스를 이용하여 글리콜 워터와의 열교환으로 생성된 응축수를 열교환으로 가열시키고 이에 가열된 응축수를 다시 보일러에 유입시킴으로써, 보일러의 연료 소비를 감소시킬 수 있는 액화천연가스운반선의 재기화 시스템을 제공하는 것을 그 목적으로 한다.Therefore, in the present invention, by using the hot waste gas discharged from the boiler by heating the condensed water generated by heat exchange with glycol water by heat exchange and the heated condensed water back to the boiler, liquefaction which can reduce the fuel consumption of the boiler Its purpose is to provide a regasification system for natural gas carriers.

상기 목적을 달성하기 위하여 본 발명은, 액화천연가스운반선의 재기화 시스템에 있어서, 액화천연가스운반선의 저장탱크에서 육상터미널로 액화천연가스를 운반하는 제 1 배관상에 설치되는 제 1 열교환기와, 액화천연가스운반선의 보일러로부터 공급되는 고온의 스팀이 통과하는 제 2 배관상에 설치되는 제 2 열교환기와, 제 2 열교환기로부터 이어져서 보일러에 연결되는 제 3 배관상에 설치되는 제 3 열교환기와, 제 2 열교환기에서 글리콜 워터와 열교환되어 제 3 배관을 따라 흐르는 응축수가 폐가스와 열교환되도록 보일러로부터 제 3 열교환기에 통과 설치되어 폐가스가 배출되는 폐가스배관을 포함하는 액화천연가스운반선의 재기화 시스템 을 제공한다.In order to achieve the above object, the present invention, in the regasification system of the liquefied natural gas carrier, the first heat exchanger is installed on the first pipe for transporting the liquefied natural gas from the storage tank of the liquefied natural gas carrier ship to the land terminal, A second heat exchanger installed on a second pipe through which hot steam supplied from a boiler of the liquefied natural gas carrier passes, a third heat exchanger installed on a third pipe connected to the boiler and connected to the boiler, It provides a regasification system of a liquefied natural gas carrier ship including a waste gas pipe is installed in the third heat exchanger from the boiler so that the condensate flowing through the third pipe heat exchanged with the glycol water in the second heat exchanger to exchange heat with the waste gas do.

그리고 바람직하게 제 1 열교환기와 제 2 열교환기에는 순환배관이 설치되 며, 순환배관에는 열교환 매개로 글리콜 워터가 순환되는 것을 특징으로 한다.And preferably, the first heat exchanger and the second heat exchanger is provided with a circulation pipe, the circulation pipe is characterized in that the glycol water is circulated through the heat exchange medium.

이상 설명한 바와 같이 본 발명의 액화천연가스운반선의 재기화 시스템에 따르면, 보일러로부터 배출되는 고온의 폐가스를 이용하여 글리콜 워터와의 열교환으로 생성된 응축수를 열교환으로 가열시키고 이에 가열된 응축수를 다시 보일러에 유입시킴으로써, 보일러의 연료 소비를 감소시킬 수 있는 효과를 가진다.As described above, according to the regasification system of the liquefied natural gas carrier of the present invention, using the hot waste gas discharged from the boiler, the condensed water generated by heat exchange with glycol water is heated by heat exchange, and the heated condensed water is returned to the boiler. By introducing, it is possible to reduce the fuel consumption of the boiler.

이하 첨부된 도면을 참조하여 본 발명의 동작 원리를 상세히 설명한다. 하기에서 본 발명을 설명함에 있어서 공지 기능 또는 구성에 대한 구체적인 설명이 본 발명의 요지를 불필요하게 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명을 생략할 것이다. 그리고 후술되는 용어들은 본 발명에서의 기능을 고려하여 정의된 용어들로서 이는 사용자, 운용자의 의도 또는 관례 등에 따라 달라질 수 있다. 그러므로 그 정의는 본 명세서 전반에 걸친 내용을 토대로 내려져야 할 것이다. Hereinafter, the operating principle of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, when it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

도 2는 본 발명의 실시예에 따른 액화천연가스운반선의 재기화 시스템의 구성도이다.2 is a block diagram of a regasification system of a liquefied natural gas carrier according to an embodiment of the present invention.

도 2에 도시된 액화천연가스운반선의 재기화 시스템은, 액화천연가스운반선의 저장탱크에서 육상터미널로 액화천연가스를 운반하는 제 1 배관(112)상에 설치되는 제 1 열교환기(110)와, 액화천연가스운반선의 보일러(100)로부터 공급되는 고온의 스팀이 통과하는 제 2 배관(122) 상에 설치되는 제 2 열교환기(120)와, 제 2 열교환기(120)로부터 이어져서 보일러(100)에 연결되는 제 3 배관(132)상에 설치되는 제 3 열교환기(130)로 구성된다.The regasification system of the liquefied natural gas carrier shown in FIG. 2 includes a first heat exchanger 110 installed on a first pipe 112 for delivering liquefied natural gas from a storage tank of the liquefied natural gas carrier to a land terminal. The second heat exchanger 120 is installed on the second pipe 122 through which the high temperature steam supplied from the boiler 100 of the liquefied natural gas carrier passes, and the second heat exchanger 120 is connected to the boiler ( It consists of a third heat exchanger 130 is installed on the third pipe 132 connected to 100.

그리고 제 3 열교환기(130)에는, 제 2 열교환기(120)에서 글리콜 워터와 열교환되어 제 3 배관(132)을 따라 흐르는 응축수가 폐가스와 열교환되도록 보일러(100)의 상단으로부터 이어지는 폐가스배관(140)이 설치된다.In the third heat exchanger 130, the waste gas pipe 140 extending from the upper end of the boiler 100 to exchange heat with glycol water in the second heat exchanger 120 and flow along the third pipe 132 to exchange heat with the waste gas. ) Is installed.

폐가스배관(140)을 통하여 보일러(100)에서 발생된 고온의 폐가스는 제 3 열교환기(130)에서 응축수와 열교환되어 저온 상태로 배출된다. 또한, 제 1 열교환기(110)와 제 2 열교환기(120)의 사이에는 폐루프 형태인(closed-loop) 순환배관(150)이 설치되며, 이 순환배관(150)에는 열교환 매개로 사용되는 글리콜 워터가 순환된다.The hot waste gas generated in the boiler 100 through the waste gas pipe 140 is heat-exchanged with the condensed water in the third heat exchanger 130 and is discharged in a low temperature state. In addition, a closed-loop circulation pipe 150 is installed between the first heat exchanger 110 and the second heat exchanger 120, and the circulation pipe 150 is used as a heat exchange medium. Glycol water is circulated.

참고로, 순환배관(150)을 따라 순환하는 글리콜 워터(glycol water)는 부동액의 일종으로, 분자량 62.07, 녹는점 -12.6℃, 끓는점 197.7℃, 비중 1.1131을 가지는 점조(粘稠)하고 감미가 있는 무색 액체이다. 이러한 글리콜 워터를 액화천연가스의 기화를 위한 열교환 매개체로 사용된다.For reference, glycol water circulating along the circulation pipe 150 is a kind of antifreeze, having a viscosity and sweetness having a molecular weight of 62.07, a melting point of -12.6 ° C, a boiling point of 197.7 ° C, and a specific gravity of 1.1131. It is a colorless liquid. This glycol water is used as a heat exchange medium for the vaporization of liquefied natural gas.

더욱이, 제 1, 2, 3 열교환기(110)(120)(130)는 별도의 구동에너지가 요구되지 않으며 단지 온도차를 갖는 두 유체 사이에서 전도와 대류의 방법으로 열전달을 일으키는 통상적인 장치인데, 온도, 압력, 유량 등의 조건에 따라 주수형 열교환기, 투관형 열교환기, 이중관형 열교환기 등과 같은 각종 열교환기를 사용하여도 무방하다.Furthermore, the first, second and third heat exchangers 110, 120 and 130 are conventional devices which do not require a separate driving energy and only generate heat transfer by conduction and convection between two fluids having a temperature difference. Various heat exchangers, such as a water injection type heat exchanger, a tube type heat exchanger, and a double tube type heat exchanger, may be used depending on conditions such as temperature, pressure, and flow rate.

이와 같은 구조로 이루어진 액화천연가스운반선의 재기화 시스템의 작용은 다음과 같이 이루어진다.The operation of the regasification system of the liquefied natural gas carriers having such a structure is performed as follows.

다시 도 2를 참고하면, 보일러(100)에서 고온의 스팀이 제 2 배관(122)을 따라 제 2 열교환기(120)를 통과하게 되며, 이때 순환배관(150)을 따라 순환하는 글리콜 워터는 제 2 열교환기(120)에서 열교환되어 가열된 상태가 된다.Referring back to FIG. 2, in the boiler 100, hot steam passes through the second heat exchanger 120 along the second pipe 122, wherein glycol water circulating along the circulation pipe 150 is made of 2 heat-exchanges in the heat exchanger 120, and it will be in the heated state.

이렇게 가열된 글리콜 워터는 다시 순환배관(150)을 따라 제 1 열교환기(110)를 통과하면서 액화천연가스운반선의 저장탱크(미도시)로부터 인출되는 액화천연가스와 열교환되어 액화천연가스를 재기화시키게 된다.The heated glycol water again passes through the first heat exchanger 110 along the circulation pipe 150 and heat exchanges with the liquefied natural gas withdrawn from the storage tank (not shown) of the liquefied natural gas carrier to regasify the liquefied natural gas. Let's go.

한편, 보일러(100)로부터 생성된 스팀이 제 2 열교환기(120)를 통과하면서 순환배관(150)내의 글리콜 워터와 열교환되어 응축수로 변환되고, 변환된 응축수는 제 3 배관(132)을 따라 흐르게 된다.Meanwhile, the steam generated from the boiler 100 passes through the second heat exchanger 120 to be exchanged with the glycol water in the circulation pipe 150 to be converted into condensate, and the converted condensate flows along the third pipe 132. do.

응축수는 제 3 열교환기(130)를 통과하면서 폐가스배관(140)을 따라 배출되는 고온의 폐가스와 열교환되어 가열되고, 폐가스는 저온 상태로 배출되며 가열된 고온의 응축수는 다시 보일러(100)로 유입된다.The condensate passes through the third heat exchanger 130 while being heated by heat exchange with the hot waste gas discharged along the waste gas pipe 140, the waste gas is discharged in a low temperature state, and the heated hot condensate flows back into the boiler 100. do.

따라서 고온의 스팀 생산을 위하여 고온의 물이 필요하고 이 고온의 물을 생성하기 위하여 보일러(100)에 많은 연료가 필요하였으나, 본 발명에서는 응축수를 바로 버리지 않고 폐가스와의 열교환으로 가열하여 보일러(100)에 재유입시킴으로써, 보일러(100)에서 냉수를 공급받아 온수로 만들기 위한 과정이 생략되어 연료 소비를 감소시킬 수 있게 되었다.Therefore, high temperature water is required for the production of high temperature steam, and a lot of fuel is required in the boiler 100 to generate the high temperature water, but in the present invention, the boiler 100 is heated by heat exchange with waste gas without directly discarding condensate. By re-injecting into), a process for supplying cold water from the boiler 100 to hot water is omitted, thereby reducing fuel consumption.

이상에서 설명한 것은 본 발명에 따른 액화천연가스운반선의 재기화 시스템은 하나의 바람직한 실시예에 불과한 것으로서, 본 발명은 상기한 실시예에 한정되 지 않고, 이하의 특허청구범위에서 청구하는 바와 같이 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변경 실시가 가능한 범위까지 본 발명의 기술적 정신이 있다고 할 것이다.As described above, the regasification system of a liquefied natural gas carrier according to the present invention is just one preferred embodiment, and the present invention is not limited to the above-described embodiment, and as claimed in the following claims. Without departing from the gist of the invention, anyone of ordinary skill in the art to which the present invention will have the technical spirit of the present invention to the extent that various modifications can be made.

도 1은 종래 기술에 따라 스팀 열교환을 이용한 선박의 재기화 설비를 도시한 구성도이고,1 is a block diagram showing a regasification plant of a vessel using steam heat exchange according to the prior art,

도 2는 본 발명의 실시예에 따른 액화천연가스운반선의 재기화 시스템의 구성도이다.2 is a block diagram of a regasification system of a liquefied natural gas carrier according to an embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>

100 : 보일러 110, 120, 130 : 제 1, 2, 3 열교환기100: boiler 110, 120, 130: first, second, third heat exchanger

112, 122, 132 : 제 1, 2 배관 140 : 폐가스배관112, 122, 132: 1st, 2nd piping 140: waste gas piping

150 : 순환배관150: circulation piping

Claims (2)

액화천연가스운반선의 재기화 시스템에 있어서,In the regasification system of a liquefied natural gas carrier, 상기 액화천연가스운반선의 저장탱크에서 육상터미널로 액화천연가스를 운반하는 제 1 배관상에 설치되는 제 1 열교환기와,A first heat exchanger installed on a first pipe for transporting the liquefied natural gas from the storage tank of the liquefied natural gas carrier to the land terminal; 상기 액화천연가스운반선의 보일러로부터 공급되는 고온의 스팀이 통과하는 제 2 배관상에 설치되는 제 2 열교환기와,A second heat exchanger installed on a second pipe through which hot steam supplied from a boiler of the liquefied natural gas carrier passes; 상기 제 2 열교환기로부터 이어져서 상기 보일러에 연결되는 제 3 배관상에 설치되는 제 3 열교환기와,A third heat exchanger installed on a third pipe connected from the second heat exchanger and connected to the boiler; 상기 제 2 열교환기에서 글리콜 워터와 열교환되어 상기 제 3 배관을 따라 흐르는 응축수가 폐가스와 열교환되도록 상기 보일러로부터 상기 제 3 열교환기에 통과 설치되어 상기 폐가스가 배출되는 폐가스배관Waste gas piping through which the condensed water flowing along the third pipe is exchanged with the waste water in the second heat exchanger and is passed through the third heat exchanger from the boiler so that the waste gas is discharged. 을 포함하는 액화천연가스운반선의 재기화 시스템.Regasification system of liquefied natural gas carrier. 제 1 항에 있어서,The method of claim 1, 상기 제 1 열교환기와 상기 제 2 열교환기에는 순환배관이 설치되며, 상기 순환배관에는 열교환 매개로 상기 글리콜 워터가 순환되는 액화천연가스운반선의 재기화 시스템.The first heat exchanger and the second heat exchanger is provided with a circulation pipe, the circulation pipe is a re-gasification system of a liquefied natural gas carrier ship in which the glycol water is circulated through heat exchange.
KR1020070126796A 2007-12-07 2007-12-07 Regasification system of lngc KR20090059763A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101219365B1 (en) * 2010-11-30 2013-01-08 에스티엑스조선해양 주식회사 LNG Regasification Facility and Method in the Vessel
KR101246051B1 (en) * 2010-11-11 2013-03-26 삼성중공업 주식회사 Lng regasification system
KR101246064B1 (en) * 2010-11-11 2013-03-26 삼성중공업 주식회사 Apparatus for regasification of liquefied natural gas
US9726327B2 (en) 2012-05-14 2017-08-08 Hyundai Heavy Industries Co., Ltd. System and method for processing liquefied gas
CN110001864A (en) * 2019-03-14 2019-07-12 上海外高桥造船有限公司 The shore-front-trials method of large-scale exhaust boiler
CN111076085A (en) * 2020-01-06 2020-04-28 阜阳国祯燃气有限公司 LNG water bath heating device and method

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101246051B1 (en) * 2010-11-11 2013-03-26 삼성중공업 주식회사 Lng regasification system
KR101246064B1 (en) * 2010-11-11 2013-03-26 삼성중공업 주식회사 Apparatus for regasification of liquefied natural gas
KR101219365B1 (en) * 2010-11-30 2013-01-08 에스티엑스조선해양 주식회사 LNG Regasification Facility and Method in the Vessel
US9726327B2 (en) 2012-05-14 2017-08-08 Hyundai Heavy Industries Co., Ltd. System and method for processing liquefied gas
US9851052B2 (en) 2012-05-14 2017-12-26 Hyundai Heavy Industries Co., Ltd. Method and system for treating a liquefied gas
US9885446B2 (en) 2012-05-14 2018-02-06 Hyundai Heavy Industries Co., Ltd. System and method for processing liquefied gas
CN110001864A (en) * 2019-03-14 2019-07-12 上海外高桥造船有限公司 The shore-front-trials method of large-scale exhaust boiler
CN110001864B (en) * 2019-03-14 2020-03-20 上海外高桥造船有限公司 Land test method for large-scale exhaust gas boiler
CN111076085A (en) * 2020-01-06 2020-04-28 阜阳国祯燃气有限公司 LNG water bath heating device and method
CN111076085B (en) * 2020-01-06 2023-12-22 阜阳国祯燃气有限公司 LNG water bath heating device and method

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