KR20190072248A - regasification apparatus of liquefied natural gas - Google Patents

regasification apparatus of liquefied natural gas Download PDF

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Publication number
KR20190072248A
KR20190072248A KR1020170173456A KR20170173456A KR20190072248A KR 20190072248 A KR20190072248 A KR 20190072248A KR 1020170173456 A KR1020170173456 A KR 1020170173456A KR 20170173456 A KR20170173456 A KR 20170173456A KR 20190072248 A KR20190072248 A KR 20190072248A
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South Korea
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natural gas
liquefied natural
suction drum
gas
storage tank
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KR1020170173456A
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Korean (ko)
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이재홍
박승선
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(유)성문
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Priority to KR1020170173456A priority Critical patent/KR20190072248A/en
Publication of KR20190072248A publication Critical patent/KR20190072248A/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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F17C2227/0135—Pumps
    • 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
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0309—Heat exchange with the fluid by heating using another fluid
    • F17C2227/0311—Air heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • 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
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0309—Heat exchange with the fluid by heating using another fluid
    • F17C2227/0316—Water heating
    • F17C2227/0318—Water heating using seawater

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

Abstract

The present invention relates to a re-gasification device of liquefied natural gas, and more specifically, to a re-gasification device of liquefied natural gas, which can improve the quality of natural gas supplied to a demand by injecting the natural gas in a gas phase into a suction drum instead of nitrogen gas to maintain the constant pressure in the suction drum in which liquefied natural gas is temporarily stored during a re-gasification process of the liquefied natural gas. To this end, the re-gasification device of liquefied natural gas comprises: a storage tank in which liquefied natural gas is stored; a suction drum connected to the storage tank and a first gas feed line to receive the liquefied natural gas from the storage tank; a gasifier connected to the suction drum and a second gas feed line to gasify the liquefied natural gas; a pressurizing pump installed at the second gas feed line to feed the liquefied natural gas from the suction drum to the gasifier; and a pressure maintenance means injecting natural gas obtained after gasifying part of the liquefied natural gas in the suction drum into an upper portion of the suction drum to maintain the pressure of the suction drum.

Description

액화천연가스의 재기화 장치{regasification apparatus of liquefied natural gas}BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a regasification apparatus for liquefied natural gas,

본 발명은 액화천연가스의 재기화 장치에 관한 것으로서, 더욱 상세하게는 액화천연가스의 재기화 과정에서 액화천연가스가 일시 저장되는 석션드럼의 내부를 일정한 압력으로 유지하기 위해 질소 가스 대신에 기상의 천연가스를 석션드럼에 주입함으로써 수요처에 공급되는 천연가스의 품질을 높일 수 있는 액화천연가스의 재기화 장치에 관한 것이다. The present invention relates to a regeneration apparatus for a liquefied natural gas, and more particularly, to a regeneration apparatus for a liquefied natural gas, in which, in the regeneration process of liquefied natural gas, To a reclaiming apparatus for liquefied natural gas capable of increasing the quality of natural gas supplied to a customer by injecting natural gas into a suction drum.

일반적으로 LNG는 메탄을 주성분으로 하는 천연가스를 -163℃로 냉각해 그 부피를 1/600로 줄인 무색 투명한 초저온 액체로 일반적으로 액화천연가스로 칭한다. Generally, LNG is a colorless transparent cryogenic liquid with a methane-based natural gas cooled to -163 ° C and its volume reduced to 1/600, and is generally referred to as liquefied natural gas.

액화천연가스(Liquefied Natural Gas)는 청정연료이고 매장량도 석유보다 풍부하다고 알려져 있고, 채광과 이송기술이 발달함에 따라 그 사용량이 급격히 증가하고 있다.Liquefied natural gas (Liquefied Natural Gas) is a clean fuel and its reserves are known to be richer than petroleum, and its usage is rapidly increasing as mining and transfer technology develops.

이러한 LNG는 산지에서 LNG수송선에 의해 수송되어 육상 LNG 터미널에 저장된 후 소비자에게 공급되거나, LNG수송선을 개조하여 천연가스 공급기능을 갖춘 부유식 해상액화천연가스 터미널이나, 액화천연가스 저장 탱크 부분을 해저에 안착시킨 고정식 해상액화천연가스 터미널에서 직접 수요처로 보내지게 된다.These LNGs are transported by LNG transport in the mountains and stored in the land LNG terminals and then supplied to consumers. Alternatively, the LNG transports may be retrofitted to provide a floating natural gas liquefied natural gas terminal with a natural gas supply function, To the customer directly from the stationary floating liquefied natural gas terminal.

상기와 같은 액화천연가스는 재기화설비에 의해 액체상태에서 기화되어 수요처로 공급되고 있다. Such liquefied natural gas is vaporized in a liquid state by a regeneration facility and supplied to a customer.

도 1에 도시된 바와 같이 종래의 액화천연가스 재기화설비는 저장탱크(10), 석션드럼(20), 가압펌프(30), 기화기(40) 등의 장치로 구성되어 있으며, 이중 석션드럼은 가압펌프의 흡입압력(순흡입양정)을 일정하게 유지하는 기능을 수행한다.As shown in FIG. 1, the conventional liquefied natural gas regeneration apparatus includes a storage tank 10, a suction drum 20, a pressurizing pump 30, a vaporizer 40, And performs a function of keeping the suction pressure (net suction lift) of the pressurizing pump constant.

이와 같은 석션드럼은 일반적으로 3~10 bar의 압력을 유지하며, 압력유지를 위하여 질소와 같은 비활성기체를 석션드럼의 상부로 가압 주입하는 형태로 설계/운전되고 있다.Such suction drums are generally designed and operated in such a manner that an inert gas such as nitrogen is injected into the upper portion of the suction drum in order to maintain a pressure of 3 to 10 bar and to maintain the pressure.

그러나, 석션드럼은 운전압력에서 액화천연가스의 증발온도인 -160℃ 부근에서 운전되므로, 상부로 가압공급되는 질소 등의 비활성 기체가 액화천연가스에 용해되어 가압펌프와 기화기를 통해 액화천연가스와 함께 기화되어 외부로 이송되는 현상이 발생되고 있다.However, because the suction drum is operated at -160 ° C, which is the evaporation temperature of the liquefied natural gas at the operating pressure, the inert gas such as nitrogen which is pressurized and supplied to the upper portion is dissolved in the liquefied natural gas, There is a phenomenon that they are vaporized together and transferred to the outside.

따라서 재기화되는 천연가스의 품질이 저하되는 문제점이 있다. Therefore, there is a problem that the quality of regenerated natural gas is deteriorated.

대한민국 등록번호 제10-0716415호: 액화천연가스 재기화설비에 사용되는 고압천연가스 펌프흡입용기Korea Registration No. 10-0716415: High Pressure Natural Gas Pump Suction Container for Liquefied Natural Gas Regeneration Equipment

본 발명은 상기의 문제점을 개선하고자 창출된 것으로서, 액화천연가스의 재기화 과정에서 액화천연가스가 일시 저장되는 석션드럼의 내부를 일정한 압력으로 유지하기 위해 질소 가스 대신에 기상의 천연가스를 석션드럼에 주입함으로써 수요처에 공급되는 천연가스의 품질을 높일 수 있는 액화천연가스의 재기화 장치를 제공하는 데 그 목적이 있다. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a suction drum for temporarily storing liquefied natural gas at a constant pressure in a regeneration process of liquefied natural gas, Which is capable of increasing the quality of natural gas supplied to a customer.

상기의 목적을 달성하기 위한 본 발명의 액화천연가스의 재기화 장치는 액화천연가스가 저장된 저장탱크와; 상기 저장탱크와 제 1가스이송라인으로 연결되어 상기 저장탱크로부터 액화천연가스가 유입되는 석션드럼과; 상기 석션드럼과 제 2가스이송라인으로 연결되어 액화천연가스를 기화시키는 기화기와; 상기 제 2가스이송라인에 설치되어 상기 석션드럼으로부터 액화천연가스를 상기 기화기로 이송시키는 가압펌프와; 상기 석션드럼의 압력유지를 위해 상기 석션드럼 내부의 액화천연가스 중 일부를 기화시켜 얻은 천연가스를 상기 석션드럼의 상부로 주입하는 압력유지수단;을 구비한다.According to an aspect of the present invention, there is provided an apparatus for regenerating liquefied natural gas, comprising: a storage tank storing liquefied natural gas; A suction drum connected to the storage tank through a first gas transfer line to receive liquefied natural gas from the storage tank; A vaporizer connected to the suction drum and the second gas transfer line to vaporize the liquefied natural gas; A pressurizing pump installed on the second gas transfer line for transferring the liquefied natural gas from the suction drum to the vaporizer; And pressure holding means for injecting natural gas obtained by vaporizing a part of the liquefied natural gas in the suction drum to the upper portion of the suction drum to maintain the pressure of the suction drum.

상기 압력유지수단은 상기 석션드럼의 외부에 설치되며 일단은 상기 석션드럼의 하부에 연결되고 타단은 상기 석션드럼의 상부에 연결되는 순환관과, 상기 순환관을 흐르는 액화천연가스를 가열하여 기화시키는 기화부를 구비한다.The pressure holding means is provided on the outside of the suction drum, one end of which is connected to the lower portion of the suction drum, and the other end is connected to the upper portion of the suction drum. And a vaporizing portion.

상기 기화부는 내부에 열교환매체가 저장된 축열조와, 상기 축열조의 내부에 설치되며 상기 순환관과 연결되어 상기 순환관을 흐르는 액화천연가스가 경유하는 제 1열교환기와, 상기 축열조의 내부에 설치되는 제 2열교환기와, 상기 제 2열교환기로 열원을 공급하는 열원공급부를 구비한다. A first heat exchanger installed in the interior of the heat storage tank and connected to the circulation pipe for passing the liquefied natural gas flowing through the circulation pipe and a second heat exchanger installed in the interior of the heat storage tank, A heat exchanger, and a heat source supply unit for supplying a heat source to the second heat exchanger.

상술한 바와 같이 본 발명에 의하면 액화천연가스의 재기화 과정에서 액화천연가스가 일시 저장되는 석션드럼의 내부를 일정한 압력으로 유지하기 위해 질소 가스 대신에 기상의 천연가스를 석션드럼에 주입함으로써 수요처에 공급되는 천연가스의 품질을 높일 수 있다. As described above, according to the present invention, in order to maintain the pressure inside the suction drum temporarily storing liquefied natural gas in the regeneration process of the liquefied natural gas, natural gas in the gas phase is injected into the suction drum instead of nitrogen gas, The quality of the supplied natural gas can be increased.

도 1은 종래의 기술에 따른 액화천연가스의 재기화 장치의 구성도이고,
도 2는 본 발명의 일 예에 따른 액화천연가스의 재기화 장치를 개략적으로 나타낸 구성도이다. FIG. 1 is a configuration diagram of a liquefied natural gas re-
FIG. 2 is a schematic view of a regeneration apparatus for liquefied natural gas according to an embodiment of the present invention.

이하, 첨부된 도면을 참조하면서 본 발명의 바람직한 실시 예에 따른 액화천연가스의 재기화 장치에 대하여 구체적으로 설명한다.Hereinafter, an apparatus for regenerating liquefied natural gas according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 2를 참조하면, 본 발명의 액화천연가스의 재기화 장치는 액화천연가스가 저장된 저장탱크(10)와, 저장탱크(10)와 제 1가스이송라인(5)으로 연결되어 저장탱크(10)로부터 액화천연가스가 유입되는 석션드럼(20)과, 석션드럼(20)과 제 2가스이송라인(7)으로 연결되어 액화천연가스를 기화시키는 기화기(40)와, 제 2가스이송라인(7)에 설치되어 석션드럼(20)으로부터 액화천연가스를 기화기(40)로 이송시키는 가압펌프(30)와, 석션드럼(20)의 압력유지를 위해 석션드럼(20) 내부의 액화천연가스 중 일부를 기화시켜 얻은 천연가스를 석션드럼(20)의 상부로 주입하는 압력유지수단을 구비한다. Referring to FIG. 2, the apparatus for regasifying liquefied natural gas according to the present invention comprises a storage tank 10 in which liquefied natural gas is stored, a storage tank 10 and a first gas transfer line 5, A vaporizer 40 connected to the suction drum 20 through a second gas transfer line 7 to vaporize the liquefied natural gas and a second gas transfer line 7 for supplying the liquefied natural gas from the suction drum 20 to the carburetor 40 and a control unit 30 for controlling the pressure of the liquefied natural gas in the suction drum 20 to maintain the pressure of the suction drum 20, And pressure holding means for injecting natural gas obtained by vaporizing a part of the natural gas into the upper portion of the suction drum 20.

저장탱크(10)는 LNG수송선, 해상액화천연가스 터미널, 고정식 해상액화천연가스 터미널, 육상 터미널 등에 설치된다. 저장탱크(10)의 내부에는 액화천연가스(Liquefied Natural Gas)가 저장된다. The storage tank 10 is installed in an LNG carrier, a marine liquefied natural gas terminal, a fixed marine liquefied natural gas terminal, a land terminal, and the like. Liquefied natural gas is stored in the storage tank 10.

제 1가스이송라인(5)은 저장탱크(10)와 석션드럼(20)을 연결한다. 따라서 저장탱크(10)에 설치된 펌프(미도시)에 의해 액화천연가스가 제 1가스이송라인(5)을 따라 흘러 석션드럼(20)으로 유입된다. The first gas transfer line (5) connects the storage tank (10) and the suction drum (20). Therefore, the liquefied natural gas flows along the first gas transfer line 5 by the pump (not shown) installed in the storage tank 10 and flows into the suction drum 20.

석션드럼(20)은 가압펌프(30)의 흡입압력(순흡입양정)을 일정하게 유지하는 기능을 수행한다. 통상적으로 석션드럼(20)의 내부는 3~10bar의 압력을 유지하도록 운전된다. The suction drum 20 functions to keep the suction pressure (net suction head) of the pressurizing pump 30 constant. Typically, the interior of the suction drum 20 is operated to maintain a pressure of 3 to 10 bar.

제 2가스이송라인(7)은 석션드럼(20)과 기화기(40)를 연결한다. 석션드럼(20)에 일시 저장된 액화천연가스는 제 2가스이송라인(7)을 따라 흘러 기화기(40)로 유입된다. The second gas transfer line 7 connects the suction drum 20 and the vaporizer 40. The liquefied natural gas temporarily stored in the suction drum (20) flows along the second gas transfer line (7) and flows into the vaporizer (40).

가압펌프(booster pump)(30)는 제 2가스이송라인(7)에 설치되어 액화천연가스를 기화기(40)로 펌핑한다. A booster pump 30 is installed in the second gas transfer line 7 to pump liquefied natural gas to the vaporizer 40.

가압펌프(30)로부터 이송된 액화천연가스를 기화시키는 기화기(40)는 고압으로 펌핑된 액화가스를 기화시켜서 수요처로 이송하게 된다. 기화기(40)는 통상적인 액화천연가스의 재기화 장치에 적용되는 구조와 동일하다. A vaporizer (40) for vaporizing the liquefied natural gas transferred from the pressurizing pump (30) vaporizes the liquefied gas pumped at a high pressure and transfers it to a customer. The vaporizer 40 is identical to the structure applied to a conventional regeneration apparatus for liquefied natural gas.

압력유지수단은 석션드럼(20) 내부를 일정한 압력(3~10bar)으로 유지하기 위함이다. 석션드럼(20)은 내부가 일정한 압력으로 유지되어야 액화천연가스의 가압펌프(30)로 이송을 원활하게 할 수 있다. The pressure maintaining means is to maintain the inside of the suction drum 20 at a constant pressure (3 to 10 bar). The suction drum 20 must be maintained at a constant pressure to smoothly transfer the natural gas to the pressurizing pump 30.

석션드럼(20)의 내부를 일정한 압력으로 유지하기 위해 종래에는 질소 가스를 석션드럼(20)의 상부로 주입한다. 하지만 본 발명은 기상의 천연가스를 석션드럼(20)의 상부로 주입하여 석션드럼(20)의 내부 압력을 유지한다. In order to keep the inside of the suction drum 20 at a constant pressure, nitrogen gas is conventionally injected into the upper portion of the suction drum 20. However, the present invention injects gaseous natural gas into the upper portion of the suction drum 20 to maintain the internal pressure of the suction drum 20.

이를 위해 압력유지수단은 석션드럼(20) 내부의 액화천연가스 중 일부를 기화시키고, 기화된 기상의 천연가스를 석션드럼(20)의 상부로 주입하여 석션드럼(20)의 내부 압력을 일정하게 유지시킨다. To this end, the pressure maintaining means vaporizes a part of the liquefied natural gas in the suction drum 20, and injects the vaporized natural gas into the upper portion of the suction drum 20 to constantly adjust the internal pressure of the suction drum 20 .

도시된 압력유지수단은 석션드럼(20)의 외부에 설치되는 순환관(51)과, 순환관(51)을 따라 흐르는 액화천연가스를 가열하여 기화시키는 기화부(60)를 구비한다. The illustrated pressure maintaining means includes a circulation pipe 51 provided on the outside of the suction drum 20 and a vaporizer 60 for heating and vaporizing the liquefied natural gas flowing along the circulation pipe 51.

순환관(51)의 일단은 석션드럼(20)의 하부에 연결되고 타단은 석션드럼(20)의 상부에 연결된다. One end of the circulation pipe (51) is connected to the lower part of the suction drum (20) and the other end is connected to the upper part of the suction drum (20).

순환관(51)에는 순환펌프(53)가 설치된다. 순환펌프(53)는 석션드럼(20)의 내부에 저장된 액화천연가스 중 일부를 순환관(51)으로 유입시킨다. The circulation pipe (51) is provided with a circulation pump (53). The circulation pump 53 introduces a part of the liquefied natural gas stored in the suction drum 20 into the circulation pipe 51.

기화부(60)는 순환관(51)을 흐르는 액화천연가스를 가열하여 기화시키는 역할을 한다. The gasification unit 60 serves to heat and vaporize the liquefied natural gas flowing through the circulation pipe 51.

기화부(60)는 일 예로 내부에 열교환매체가 저장된 축열조(61)와, 축열조(61)의 내부에 설치되며 제 1열교환기(63)와, 축열조(61)의 내부에 설치되는 제 2열교환기(65)와, 제 2열교환기(65)로 열원을 공급하는 열원공급부를 구비한다. The gasification unit 60 includes a heat storage tank 61 in which a heat exchange medium is stored, a first heat exchanger 63 installed inside the heat storage tank 61, and a second heat exchange And a heat source supply unit for supplying a heat source to the second heat exchanger (65).

축열조(61)의 내부에는 열교환매체가 저장된다. 열교환매체로 물, 냉매, 가스 등이 이용될 수 있다. A heat exchange medium is stored inside the heat storage tank (61). As the heat exchange medium, water, refrigerant, gas or the like can be used.

순환관(51)은 축열조(61)의 내부를 통과한다. 축열조(61)의 내부에 위치하는 순환관(51)에는 제 1열교환기(63)가 설치된다. 따라서 석션드럼(20)의 내부에서 순환관(51)으로 이동하는 액화천연가스는 제 1열교환기(63)를 통과한다. The circulation pipe (51) passes through the interior of the heat storage tank (61). A first heat exchanger (63) is installed in the circulation pipe (51) located inside the heat storage tank (61). Therefore, the liquefied natural gas moving from the suction drum 20 to the circulation pipe 51 passes through the first heat exchanger 63.

제 2열교환기(65)는 축열조(61)의 내부에 설치된다. 제 2열교환기(65)는 제 1열교환기(63)와 인접하게 설치된다. The second heat exchanger (65) is installed inside the heat storage tank (61). The second heat exchanger (65) is installed adjacent to the first heat exchanger (63).

열원공급부는 제 2열교환기(65)와 연결되어 제 2열교환기(65)로 열원을 공급한다. 열원으로 해수, 가열된 공기 등을 이용할 수 있다. 도시되지 않았지만 열원공급부는 일 예로 제 2열교환기와 연결되는 온수관과, 온수관에 온수를 공급하는 보일러로 이루어질 수 있다. The heat source supply unit is connected to the second heat exchanger (65) to supply the heat source to the second heat exchanger (65). Seawater, heated air, etc. can be used as a heat source. Although not shown, the heat source supply unit may include, for example, a hot water pipe connected to the second heat exchanger and a boiler for supplying hot water to the hot water pipe.

제 2열교환기(65)에서 발생된 열은 열교환매체를 통해 제 1열교환기(63)로 전달된다. 제 1열교환기(63)로 전달된 열에 의해 제 1열교환기(63)를 통과하는 액화천연가스가 가열되면서 기상의 천연가스로 기화된다. 기화된 천연가스는 석션드럼(20)의 상부로 주입되어 석션드럼(20)의 내부 압력을 일정하게 유지시킨다. The heat generated in the second heat exchanger (65) is transferred to the first heat exchanger (63) through the heat exchange medium. The liquefied natural gas passing through the first heat exchanger (63) is heated by the heat transferred to the first heat exchanger (63), and is vaporized into gaseous natural gas. The vaporized natural gas is injected into the upper portion of the suction drum 20 to keep the internal pressure of the suction drum 20 constant.

기화된 천연가스가 흐르는 순환관(51)에는 압력조절밸브(55)가 설치되어 석션드럼으로 주입되는 천연가스의 압력을 조절할 수 있다. A pressure control valve (55) is installed in the circulation pipe (51) through which vaporized natural gas flows to adjust the pressure of the natural gas injected into the suction drum.

이와 같이 본 발명은 질소 가스 대신에 기상의 천연가스를 석션드럼에 주입함으로써 수요처에 공급되는 천연가스의 품질을 높일 수 있다. As described above, the present invention can increase the quality of natural gas supplied to a customer by injecting gaseous natural gas into the suction drum instead of nitrogen gas.

이상, 본 발명은 일 실시 예를 참고로 설명되었으나 이는 예시적인 것에 불과하며, 당해 기술분야에서 통상의 지식을 가진 자라면 이로부터 다양한 변형 및 균등한 실시 예가 가능하다는 점을 이해할 것이다. 따라서 본 발명의 진정한 보호 범위는 첨부된 청구범위에 의해서만 정해져야 할 것이다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

5: 제 1가스이송관 7: 제 2가스이송관
10: 저장탱크 20: 석션드럼
30: 가압펌프 40: 기화기
51: 순환관 60: 기화부
61: 축열조 63: 제 1열교환기
65: 제 2열교환기 5: first gas delivery pipe 7: second gas delivery pipe
10: Storage tank 20: Suction drum
30: pressurizing pump 40: vaporizer
51: circulation pipe 60:
61: heat storage tank 63: first heat exchanger
65: second heat exchanger

Claims (3)

액화천연가스가 저장된 저장탱크와;
상기 저장탱크와 제 1가스이송라인으로 연결되어 상기 저장탱크로부터 액화천연가스가 유입되는 석션드럼과;
상기 석션드럼과 제 2가스이송라인으로 연결되어 액화천연가스를 기화시키는 기화기와;
상기 제 2가스이송라인에 설치되어 상기 석션드럼으로부터 액화천연가스를 상기 기화기로 이송시키는 가압펌프와;
상기 석션드럼의 압력유지를 위해 상기 석션드럼 내부의 액화천연가스 중 일부를 기화시켜 얻은 천연가스를 상기 석션드럼의 상부로 주입하는 압력유지수단;을 구비하는 것을 특징으로 하는 액화천연가스의 재기화 장치.A storage tank for storing liquefied natural gas;
A suction drum connected to the storage tank through a first gas transfer line to receive liquefied natural gas from the storage tank;
A vaporizer connected to the suction drum and the second gas transfer line to vaporize the liquefied natural gas;
A pressurizing pump installed on the second gas transfer line for transferring the liquefied natural gas from the suction drum to the vaporizer;
And a pressure holding means for injecting natural gas obtained by vaporizing a part of the liquefied natural gas in the suction drum into the upper portion of the suction drum to maintain the pressure of the suction drum. Device. 제 1항에 있어서, 상기 압력유지수단은 상기 석션드럼의 외부에 설치되며 일단은 상기 석션드럼의 하부에 연결되고 타단은 상기 석션드럼의 상부에 연결되는 순환관과, 상기 순환관을 흐르는 액화천연가스를 가열하여 기화시키는 기화부를 구비하는 것을 특징으로 하는 액화천연가스의 재기화 장치.[2] The apparatus according to claim 1, wherein the pressure holding means comprises: a circulation tube provided outside the suction drum, one end connected to a lower portion of the suction drum and the other end connected to an upper portion of the suction drum; And a gasification section for heating and gasifying the gas. 제 2항에 있어서, 상기 기화부는 내부에 열교환매체가 저장된 축열조와, 상기 축열조의 내부에 설치되며 상기 순환관과 연결되어 상기 순환관을 흐르는 액화천연가스가 경유하는 제 1열교환기와, 상기 축열조의 내부에 설치되는 제 2열교환기와, 상기 제 2열교환기로 열원을 공급하는 열원공급부를 구비하는 것을 특징으로 하는 액화천연가스의 재기화 장치.
[Claim 3] The method according to claim 2, wherein the vaporizing unit comprises: a heat storage tank in which a heat exchange medium is stored; a first heat exchanger installed in the heat storage tank and connected to the circulation pipe to pass the liquefied natural gas flowing through the circulation pipe; And a heat source supply unit for supplying a heat source to the second heat exchanger.
KR1020170173456A 2017-12-15 2017-12-15 regasification apparatus of liquefied natural gas KR20190072248A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114636102A (en) * 2021-06-30 2022-06-17 杭州堃博生物科技有限公司 Working medium pressure control method for cryoablation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100716415B1 (en) 2006-09-26 2007-05-11 현대중공업 주식회사 Suction drum for high pressure lng pumps in lng re-gasification facility

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100716415B1 (en) 2006-09-26 2007-05-11 현대중공업 주식회사 Suction drum for high pressure lng pumps in lng re-gasification facility

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114636102A (en) * 2021-06-30 2022-06-17 杭州堃博生物科技有限公司 Working medium pressure control method for cryoablation
CN114636102B (en) * 2021-06-30 2024-01-09 杭州堃博生物科技有限公司 Working medium pressure control method for cryoablation

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