KR101249401B1 - A Intermediate LNG Storage Tank to reject boil-off gas - Google Patents

A Intermediate LNG Storage Tank to reject boil-off gas Download PDF

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KR101249401B1
KR101249401B1 KR1020110018022A KR20110018022A KR101249401B1 KR 101249401 B1 KR101249401 B1 KR 101249401B1 KR 1020110018022 A KR1020110018022 A KR 1020110018022A KR 20110018022 A KR20110018022 A KR 20110018022A KR 101249401 B1 KR101249401 B1 KR 101249401B1
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lng
storage tank
boil
gas
lng storage
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KR1020110018022A
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Korean (ko)
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KR20120098216A (en
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장대준
장광필
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한국과학기술원
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    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0047—Layout or arrangement of systems for feeding fuel
    • F02M37/0052—Details on the fuel return circuit; Arrangement of pressure regulators
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0011—Constructional details; Manufacturing or assembly of elements of fuel systems; Materials therefor
    • F02M37/0023—Valves in the fuel supply and return system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/0076—Details of the fuel feeding system related to the fuel tank
    • 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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/04—Feeding by means of driven pumps
    • 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

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

Abstract

본 발명의 증발가스 처리장치는 LNG를 저장하는 복수개의 LNG 저장탱크와 상기 LNG 저장탱크로부터 LNG를 선박엔진에 공급하기 위한 LNG 공급라인을 포함하되, 상기 LNG 공급라인은 상기 LNG 저장탱크에 연결되어 LNG의 흐름 개폐를 결정하는 공급밸브, 상기 공급밸브가 연결되어 각각 상기 LNG 저장탱크에서 공급되는 LNG를 분배하는 LNG 분배관, 상기 LNG 분배관으로부터 공급되는 LNG를 저장하는 중간저장탱크, 및 상기 중간저장탱크로부터 공급되는 LNG의 압력을 높여주는 LNG펌프를 포함하는 것을 특징으로 한다.Evaporation gas processing apparatus of the present invention includes a plurality of LNG storage tank for storing LNG and LNG supply line for supplying LNG from the LNG storage tank to the ship engine, the LNG supply line is connected to the LNG storage tank Supply valve for determining the flow opening and closing of the LNG, LNG supply pipe connected to each of the supply valve is connected to distribute the LNG supplied from the LNG storage tank, intermediate storage tank for storing the LNG supplied from the LNG distribution pipe, and the intermediate It characterized in that it comprises an LNG pump for increasing the pressure of the LNG supplied from the storage tank.

Description

증발가스 처리장치{A Intermediate LNG Storage Tank to reject boil-off gas}Evaporation Gas Treatment System {A Intermediate LNG Storage Tank to reject boil-off gas}

본 발명은 증발가스 처리장치에 관한 것으로, 더욱 상세하게는 LNG 저장탱크와 LNG펌프 사이에 중간저장탱크를 구비하고 있어 LNG펌프에 기계적인 충격을 가할 가능성이 있는 증발가스를 미연에 제거하는 장치에 관한 것이다.
The present invention relates to an apparatus for treating boil-off gas, and more particularly, to an apparatus for removing boil-off gas beforehand, which has an intermediate storage tank between the LNG storage tank and the LNG pump, which may cause mechanical impact on the LNG pump. It is about.

일반적으로, 액화천연가스(LNG: Liquefied Natural Gas)는 청정연료이고 매장량도 석유보다 풍부하다고 알려져 있고, 채광과 이송기술이 발달함에 따라서 그 사용량이 급격히 증가하고 있다.In general, liquefied natural gas (LNG) is known to be a clean fuel and abundant in reserves than petroleum, and its use is rapidly increasing with the development of mining and transportation technology.

특히, 공해 물질이 다량 배출되는 중질연료유(Heavy Fuel Oil)나 디젤 연료를 대신하여 선박의 추진연료를 액화천연가스를 이용하는 것이 최근 들어서 고려되고 있다.In particular, the use of liquefied natural gas as a propulsion fuel for ships in place of heavy fuel oil or diesel fuel, in which large amounts of pollutants are emitted, has recently been considered.

이때, 상기 액화천연가스를 선박에 적재한 후에 펌프를 사용하여 압력을 상승시킨 후 선박 엔진에 공급해주어야 한다.At this time, after loading the liquefied natural gas on the vessel to increase the pressure using a pump to be supplied to the vessel engine.

도 1은 종래의 LNG 저장탱크(10)로부터 선박엔진으로 LNG를 공급 방법을 도시화한 것이다.1 illustrates a method of supplying LNG to a ship engine from a conventional LNG storage tank 10.

상기 LNG 저장탱크(10)에 저장된 LNG가 LNG 공급라인(20)을 통해 LNG 펌프(21)로 공급되고 상기 LNG 펌프(21)를 통해 고압의 LNG 펌프(21)가 선박 엔진으로 공급된다.LNG stored in the LNG storage tank 10 is supplied to the LNG pump 21 through the LNG supply line 20 and the high pressure LNG pump 21 is supplied to the ship engine through the LNG pump 21.

이러한 실시는 LNG 저장탱크(10)와 LNG 펌프(21)의 거리가 짧은 경우에는 별 문제점이 없지만, LNG 저장탱크(10)에 적재되는 LNG의 양이 많아짐에 따라 LNG 저장탱크(10)의 부피가 커지게 되고, 개수가 증가함에 따라서 LNG 저장탱크(10)와 LNG 펌프(21)의 거리가 증가하게 되었다.This implementation has no problem when the distance between the LNG storage tank 10 and the LNG pump 21 is short, but the volume of the LNG storage tank 10 increases as the amount of LNG loaded into the LNG storage tank 10 increases. As the number increases, the distance between the LNG storage tank 10 and the LNG pump 21 increases as the number increases.

따라서, LNG 저장탱크(10)와 LNG 펌프(21)의 거리가 증가됨에 따라 LNG 공급라인(20)의 길이가 길어지게 되고 열침투가 발생하게 되어 액상 100%였던 LNG는 LNG 펌프(21) 입구에 도달하면 증발가스가 발생하게 되고, 액상이 100% 이하가 되었다.Therefore, as the distance between the LNG storage tank 10 and the LNG pump 21 increases, the length of the LNG supply line 20 becomes longer and thermal penetration occurs, so that LNG, which was 100% liquid, enters the LNG pump 21. When the evaporation gas was reached, the evaporation gas was generated and the liquid phase became 100% or less.

액상이 100%이하인 LNG가 LNG 펌프(21)에 도달하게 되면 증발가스의 질량은 소량이지만 부피 측면에서는 상당량이 되어 LNG 펌프(21)에 기계적인 충격을 유발하는 문제점이 발생하였다.
When the LNG having a liquid phase of 100% or less reaches the LNG pump 21, the mass of the evaporated gas is small, but in terms of volume, the LNG has a problem that causes mechanical shock to the LNG pump 21.

본 발명은 상기와 같은 문제점을 해소하기 위하여 안출된 것으로서, 더욱 상세하게는 LNG 공급라인에서 발생하는 증발가스로 인한 LNG 펌프에 기계적인 충격이 발생하지 않고, LNG탱크의 혼합도를 향상시켜 LNG 저장탱크의 압력상승을 완화할 수 있는 증발가스 처리장치를 제공하려는데 그 목적이 있다.
The present invention has been made in order to solve the above problems, more specifically, does not cause mechanical impact on the LNG pump due to the boil-off gas generated in the LNG supply line, LNG storage by improving the mixing degree of the LNG tank An object of the present invention is to provide an evaporative gas treatment device that can alleviate the pressure rise of the tank.

본 발명의 증발가스 처리장치는 LNG를 저장하는 복수개의 LNG 저장탱크(100)와 상기 LNG 저장탱크(100)로부터 LNG를 선박엔진에 공급하기 위한 LNG 공급라인(200)을 포함하되, 상기 LNG 공급라인(200)은 상기 LNG 저장탱크(100)에 연결되어 LNG의 흐름 개폐를 결정하는 공급밸브(210), 상기 공급밸브(210)가 연결되어 각각 상기 LNG 저장탱크(100)에서 공급되는 LNG를 분배하는 LNG 분배관(220), 상기 LNG 분배관(220)으로부터 공급되는 LNG를 저장하는 중간저장탱크(230) 및 상기 중간저장탱크(230)로부터 공급되는 LNG의 압력을 높여주는 LNG 펌프(240)를 포함하는 것을 특징으로 한다.The apparatus for treating boil-off gas of the present invention includes a plurality of LNG storage tanks 100 for storing LNG and an LNG supply line 200 for supplying LNG from the LNG storage tank 100 to a ship engine. The line 200 is connected to the LNG storage tank 100 and supplies a supply valve 210 for determining the flow opening and closing of the LNG, and the supply valve 210 is connected to each of the LNG supplied from the LNG storage tank 100. LNG distribution pipe 220 for distributing, the intermediate storage tank 230 for storing the LNG supplied from the LNG distribution pipe 220 and LNG pump 240 for increasing the pressure of the LNG supplied from the intermediate storage tank 230 It characterized by including).

또한, 상기 중간저장탱크(230)에 일측이 연결되고, 타측이 상기 LNG 저장탱크(100)에 연결되는 LNG 회수라인(300)를 포함하는 것을 특징으로 한다.In addition, one side is connected to the intermediate storage tank 230, the other side is characterized in that it comprises an LNG recovery line 300 connected to the LNG storage tank (100).

또한, 상기 중간저장탱크(230)에 일측이 연결되고, 타측이 LNG를 공급받은 제1 LNG 저장탱크(110) 이외에 제2 LNG 저장탱크(120), 제3 LNG 저장탱크(130), 및 제4 LNG 저장탱크(140) 중 선택되는 LNG 저장탱크에 연결되는 LNG 회수라인(300)을 포함하는 것을 특징으로 한다.In addition, one side is connected to the intermediate storage tank 230, the other LNG in addition to the first LNG storage tank 110, the second LNG storage tank 120, the third LNG storage tank 130, and the third 4 LNG storage tank 140, characterized in that it comprises an LNG recovery line 300 connected to the selected LNG storage tank.

또한, 상기 LNG 회수라인(300)에 상기 LNG 저장탱크(100)로 돌려보내는 증발가스의 양을 조절할 수 있는 수위조절밸브(310)를 포함하는 것을 특징으로 한다.In addition, the LNG recovery line 300 is characterized in that it comprises a water level control valve 310 that can adjust the amount of boil-off gas returned to the LNG storage tank (100).

또한, 상기 LNG 회수라인(300)으로부터 상기 LNG 저장탱크(100)로 증발가스가 주입될 경우, LNG의 수위 상부로 증발가스가 주입되는 것을 특징으로 한다.In addition, when the boil-off gas is injected into the LNG storage tank 100 from the LNG recovery line 300, the boil-off gas is injected into the upper level of the LNG.

또한, 상기 LNG 회수라인(300)으로부터 상기 LNG 저장탱크(100)로 증발가스가 주입될 경우, LNG의 수위 하부로 증발가스가 주입되는 것을 특징으로 한다.In addition, when the boil-off gas is injected into the LNG storage tank 100 from the LNG recovery line 300, the boil-off gas is injected into the lower level of the LNG.

또한, 상기 LNG 저장탱크(100)의 내부에 복수개의 흐름 유도판(150)이 형성되어 있는 것을 특징으로 한다.In addition, it is characterized in that a plurality of flow guide plate 150 is formed inside the LNG storage tank (100).

또한, 상기 흐름 유도판(150)이 상기 증발가스가 원활히 이동할 수 있도록 수평면을 기준으로 상방으로 경사져 있는 것을 특징으로 한다.
In addition, the flow guide plate 150 is characterized in that it is inclined upward based on a horizontal plane so that the boil-off gas can move smoothly.

본 발명의 증발가스 처리장치는 LNG 저장탱크와 LNG펌프 사이에 중간저장탱크를 구비하여 LNG 공급라인에서 발생하는 증발가스로 인한 LNG 펌프에 기계적인 충격이 발생하지 않게 하며, LNG 저장탱크의 내부에 하나이상의 흐름 유도판을 구비하고 있어 LNG탱크의 혼합도를 향상시켜 LNG 저장탱크의 압력상승을 완화할 수 있다.
Evaporation gas treatment apparatus of the present invention is provided with an intermediate storage tank between the LNG storage tank and the LNG pump so that mechanical impact does not occur in the LNG pump due to the boil-off gas generated in the LNG supply line, the inside of the LNG storage tank It is equipped with one or more flow guide plate to improve the mixing of the LNG tank to reduce the pressure rise of the LNG storage tank.

도 1은 종래의 LNG 저장탱크로부터 선박 엔진으로 LNG를 공급하는 방법을 나타내는 실시 예
도 2는 본 발명의 증발가스 처리장치 제1 실시예를 나타내는 구성도
도 3은 본 발명의 증발가스 처리장치 제2 실시예를 나타내는 구성도
도 4는 본 발명의 증발가스 처리장치 제3 실시예를 나타내는 구성도
도 5는 본 발명의 흐름 유도판을 구비한 LNG 저장탱크를 나타내는 구성도
도 6는 본 발명의 흐름 유도판을 구비한 LNG 저장탱크 내부에서의 증발가스 흐름을 나타내는 구성도1 is a view showing a method for supplying LNG to a marine engine from a conventional LNG storage tank
Figure 2 is a block diagram showing a first embodiment of the boil-off gas treatment apparatus of the present invention
Figure 3 is a block diagram showing a second embodiment of the boil-off gas treatment apparatus of the present invention
Figure 4 is a block diagram showing a third embodiment of the boil-off gas treatment apparatus of the present invention
5 is a configuration diagram showing a LNG storage tank having a flow guide plate of the present invention
Figure 6 is a block diagram showing the flow of boil-off gas in the LNG storage tank having a flow guide plate of the present invention

이하, 본 발명의 기술적 사상을 첨부된 도면을 사용하여 더욱 구체적으로 설명한다.Hereinafter, the technical idea of the present invention will be described more specifically with reference to the accompanying drawings.

그러나 첨부된 도면은 본 발명의 기술적 사상을 더욱 구체적으로 설명하기 위하여 도시한 일예에 불과하므로 본 발명의 기술적 사상이 첨부된 도면의 형태에 한정되는 것은 아니다.
However, the accompanying drawings are only examples to illustrate the technical idea of the present invention in more detail, and thus the technical idea of the present invention is not limited to the accompanying drawings.

도 2는 본 발명의 증발가스 처리장치의 제1 실시예를 보여주는 구성도이다.Figure 2 is a block diagram showing a first embodiment of the boil-off gas treatment apparatus of the present invention.

본 발명의 증발가스 처리장치는 크게 복수개의 LNG 저장탱크(100)와 상기 LNG 저장탱크(100)로부터 LNG를 선박엔진에 공급하기 위한 LNG 공급라인(200)으로 구성된다.The apparatus for treating boil-off gas of the present invention is composed of a plurality of LNG storage tanks 100 and an LNG supply line 200 for supplying LNG from the LNG storage tank 100 to a ship engine.

상기 LNG 저장탱크(100)는 제1 LNG저장탱크(110), 제2 LNG 저장탱크(120), 제3 LNG 저장탱크(130), 및 제4 LNG 저장탱크(140)로 구성될 수 있다.The LNG storage tank 100 may be composed of a first LNG storage tank 110, a second LNG storage tank 120, a third LNG storage tank 130, and a fourth LNG storage tank 140.

상기 LNG 공급라인(200)은 공급밸브(210), LNG 분배관(220), 중간저장탱크(230), LNG 펌프(240), 및 수위조절밸브(310)를 포함한다.The LNG supply line 200 includes a supply valve 210, an LNG distribution pipe 220, an intermediate storage tank 230, an LNG pump 240, and a water level control valve 310.

상기 공급밸브(210)는 상기 LNG 저장탱크(100)에 연결되어 LNG의 흐름 개폐를 결정하는 밸브이다.The supply valve 210 is a valve connected to the LNG storage tank 100 to determine the flow opening and closing of the LNG.

상기 LNG 분배관(220)은 복수개의 LNG 저장탱크(100)가 연결되어 상기 LNG 저장탱크(100)로부터 공급된 LNG를 상기 중간저장탱크(230)로 공급하는 역할을 한다.The LNG distribution pipe 220 is connected to a plurality of LNG storage tank 100 serves to supply the LNG supplied from the LNG storage tank 100 to the intermediate storage tank 230.

상기 중간저장탱크(230)는 상기 LNG 분배관(220)으로부터 공급되는 LNG를 임시적으로 저장하는 탱크이다.The intermediate storage tank 230 is a tank for temporarily storing the LNG supplied from the LNG distribution pipe 220.

상기 LNG 펌프(240)는 상기 중간저장탱크(230)에서 증발가스와 액상 LNG가 분리된 후 액상의 LNG가 공급되어 LNG의 압력을 높여 선박엔진에 공급하는 역할을 한다.The LNG pump 240 serves to supply the ship engine by increasing the pressure of the LNG by supplying the liquid LNG after the evaporation gas and the liquid LNG is separated from the intermediate storage tank 230.

이때, 상기 중간저장탱크(230)에서 분리된 증발가스는 LNG 회수라인(300)을 통해 다시 상기 LNG 저장탱크(100)로 회수 될 수 있다.At this time, the boil-off gas separated from the intermediate storage tank 230 may be recovered to the LNG storage tank 100 again through the LNG recovery line 300.

상기 LNG 회수라인(300)에는 수위조절밸브(310)가 위치하고 있어, 상기 중간저장탱크(230)로부터 상기 LNG 저장탱크(100)로 회수되는 증발가스의 양을 조절하게된다.A level control valve 310 is located in the LNG recovery line 300 to adjust the amount of boil-off gas recovered from the intermediate storage tank 230 to the LNG storage tank 100.

더욱 상세하게는, 상기 중간저장탱크(230)의 내부에 증발가스량이 많아지게 되면 액상의 수위가 설정치보다 내려가게 되고, 이때 상기 수위조절밸브(310)가 열려서 증발가스를 상기 LNG 저장탱크(100)로 보내게 된다.In more detail, when the amount of boil-off gas in the intermediate storage tank 230 increases, the liquid level is lower than the set value. At this time, the water level control valve 310 is opened to convert the boil-off gas into the LNG storage tank 100. Will be sent).

또한, 상기 중간저장탱크(230)의 수위가 설정치에 도달하게 되면 상기 수위조절밸브(310)가 잠기게 된다.
In addition, when the water level of the intermediate storage tank 230 reaches a set value, the water level control valve 310 is locked.

상기 중간저장탱크(230)로부터 회수되는 증발가스는 상기 LNG 저장탱크(100)에 주입될 경우, 상기 LNG 저장탱크(100)의 LNG 수위 상부 또는 하부로 증발가스가 주입될 수 있다.When the boil-off gas recovered from the intermediate storage tank 230 is injected into the LNG storage tank 100, the boil-off gas may be injected into the upper or lower LNG level of the LNG storage tank 100.

도 2는 상기 LNG 저장탱크(100)의 LNG 수위 상부로 증발가스가 주입되는 실시예를 나타내는 구성도이고, 도 3은 상기 LNG 저장탱크(100)의 LNG 수위 하부로 증발가스가 주입되는 실시예를 나타내는 구성도이다.2 is a configuration diagram showing an embodiment in which boil-off gas is injected into the upper LNG level of the LNG storage tank 100, and FIG. 3 is an embodiment in which boil-off gas is injected into the LNG level in the LNG storage tank 100. It is a block diagram which shows.

상기 LNG 저장탱크(100)의 LNG 수위 하부로 증발가스가 주입되는 이유는 LNG의 국부적인 온도 상승을 막기 위한 것이다.The reason why the boil-off gas is injected below the LNG level of the LNG storage tank 100 is to prevent the local temperature rise of the LNG.

좀 더 상세하게는, 상기 LNG 저장탱크(100)가 대형화됨에 따라, 상부의 LNG 온도가 하부의 LNG 온도보다 상승하는 현상이 발생하여, 상기 LNG 저장탱크(100) 내부의 압력은 상부의 LNG에 의해 지배를 받게 되므로, 상기 LNG 저장탱크(100) 내부의 압력이 상승하게 된다. More specifically, as the LNG storage tank 100 is enlarged, a phenomenon occurs in which the upper LNG temperature rises above the lower LNG temperature, so that the pressure inside the LNG storage tank 100 is applied to the upper LNG. Since it is controlled by, the pressure inside the LNG storage tank 100 is increased.

따라서, LNG를 전체적으로 혼합시켜주면 압력증가를 감소시킬 수 있으므로 LNG 수위의 하부에 주입되는 증발가스는 자연스럽게 위로 상승하게 된다.Therefore, when the total mixture of LNG can reduce the pressure increase, the boil-off gas injected into the lower portion of the LNG level rises naturally.

이때, LNG의 유동을 유발하게 되어 증발가스와 액상의 LNG가 혼합되어 전체적인 혼합도가 상승되어 상기 LNG 저장탱크(100)의 내부의 압력상승을 완화시킬 수 있다.
At this time, the flow of LNG is induced to mix the boil-off gas and the liquid LNG to increase the overall mixing degree to alleviate the pressure rise inside the LNG storage tank (100).

도 4는 본 발명의 증발가스 처리장치 제3 실시예를 나타내는 구성도이다.4 is a configuration diagram showing a third embodiment of the boil-off gas treatment apparatus of the present invention.

상기 중간저장탱크(230)로부터 회수되는 증발가스는 LNG를 공급받은 제1 LNG저장탱크(110) 이외에 제2 LNG 저장탱크(120), 제3 LNG 저장탱크(130), 및 제4 LNG 저장탱크(140) 중 선택되는 LNG 저장탱크에 연결에 주입할 수 있다.The boil-off gas recovered from the intermediate storage tank 230 is, in addition to the first LNG storage tank 110 supplied with LNG, the second LNG storage tank 120, the third LNG storage tank 130, and the fourth LNG storage tank. It can be injected into the connection to the LNG storage tank selected from 140.

좀 더 상세하게는, 본 발명의 증발가스 처리장치는 복수개의 LNG 저장탱크(100)를 구비하고 있어, 상기 LNG 회수라인(300)의 타측을 LNG를 공급하는 상기 제1 LNG 저장탱크(110)에 주입하는 것이 아니라 제2 LNG 저장탱크(120), 제3 LNG 저장탱크(130), 및 제4 LNG 저장탱크(140) 압력이 상대적으로 낮은 LNG 저장탱크를 선별하여 그 곳에 증발가스를 유입시킬 수 있다.More specifically, the boil-off gas treatment apparatus of the present invention includes a plurality of LNG storage tanks 100, and the first LNG storage tank 110 for supplying LNG to the other side of the LNG recovery line 300. Instead of injecting into the second LNG storage tank 120, the third LNG storage tank 130, and the fourth LNG storage tank 140, the LNG storage tank with a relatively low pressure is selected and the evaporation gas is introduced therein. Can be.

도 4에서는 LNG 저장탱크(100)를 4개로 한정하였지만, 본 발명의 LNG 저장탱크(100)는 복수개가 구비되어 상기 LNG 분배관(220)에 연결될 수 있다.
In FIG. 4, the LNG storage tank 100 is limited to four, but a plurality of LNG storage tanks 100 of the present invention may be provided and connected to the LNG distribution pipe 220.

도 5 내지 도 6을 이용하여 상기 LNG 저장탱크(100) 내부에 구비되는 복수개의 흐름 유도판(150)에 대해서 설명한다.5 to 6, a plurality of flow guide plates 150 provided in the LNG storage tank 100 will be described.

상기 LNG 저장탱크(100)의 LNG 수위 하부로 증발가스가 주입될 경우, 복수개의 흐름 유도판(150)을 설치하여 LNG와 증발가스의 혼합도를 상승시킬 수 있다.When the boil-off gas is injected into the lower LNG level of the LNG storage tank 100, a plurality of flow guide plate 150 may be installed to increase the mixing degree of the LNG and the boil-off gas.

좀 더 상세하게는, 증발가스가 상기 LNG 저장탱크(100)의 LNG 수위 하부로 주입될 경우, 밀도차에 의해서 상부로 상승하게 되고 이때 증발가스가 상기 흐름 유도판(150)을 따라서 이동하게 된다.In more detail, when the boil-off gas is injected into the lower LNG level of the LNG storage tank 100, the boil-up gas rises upward due to the density difference, and the boil-off gas moves along the flow guide plate 150. .

이때, 상기 LNG 저장탱크(100)의 LNG와 상기 중간저장장치로부터 유입된 증발가스가 접촉되어 서로 혼합되게 된다.At this time, the LNG of the LNG storage tank 100 and the boil-off gas introduced from the intermediate storage device is contacted and mixed with each other.

또한, 상기 흐름 유도판(150)은 수평면을 기준으로 상방으로 경사져 있어, 증발가스가 상기 흐름 유도판(150)을 하부면을 따라서 원활히 이동한다.
In addition, the flow guide plate 150 is inclined upward based on a horizontal plane, so that the evaporation gas smoothly moves the flow guide plate 150 along the lower surface.

따라서, 본 발명의 증발가스 처리장치는 LNG 저장탱크(100)와 LNG 펌프(240) 사이에 중간저장탱크(230)를 구비하여 LNG 공급라인(200)에서 발생하는 증발가스로 인한 LNG 펌프(240)에 기계적인 충격이 발생하지 않게 하며, LNG 저장탱크(100)의 내부에 하나이상의 흐름 유도판(150)을 구비하고 있어 LNG탱크의 혼합도를 향상시켜 LNG 저장탱크(100)의 압력상승을 완화할 수 있다.
Therefore, the boil-off gas treatment apparatus of the present invention includes an intermediate storage tank 230 between the LNG storage tank 100 and the LNG pump 240, and thus the LNG pump 240 due to the boil-off gas generated in the LNG supply line 200. The mechanical shock is prevented from occurring) and one or more flow guide plates 150 are provided inside the LNG storage tank 100 to improve the mixing of the LNG tanks, thereby increasing the pressure of the LNG storage tank 100. I can alleviate it.

*종래의 LNG 공급장치
10 : LNG 저장탱크
20 : LNG 공급라인
21 : LNG 펌프
*본 발명의 증발가스 처리장치
100 : LNG 저장탱크 110 : 제1 LNG 저장탱크
120 : 제2 LNG 저장탱크 130 : 제3 LNG 저장탱크
140 : 제4 LNG 저장탱크 150 : 흐름 유도판
200 : LNG 공급라인 210 : 공급밸브
220 : LNG 분배관 230 : 중간저장탱크
240 : LNG 펌프 300 : LNG 회수라인
310 : 수위조절밸브* LNG supply equipment
10: LNG storage tank
20: LNG supply line
21: LNG Pump
* Evaporation gas treatment device of the present invention
100: LNG storage tank 110: first LNG storage tank
120: second LNG storage tank 130: third LNG storage tank
140: fourth LNG storage tank 150: flow guide plate
200: LNG supply line 210: supply valve
220: LNG distribution pipe 230: intermediate storage tank
240: LNG pump 300: LNG recovery line
310: level control valve

Claims (8)

LNG를 저장하는 복수개의 LNG 저장탱크(100);와
상기 LNG 저장탱크(100)로부터 LNG를 선박엔진에 공급하기 위한 LNG 공급라인(200); 을 포함하되,
상기 LNG 공급라인(200)은
상기 LNG 저장탱크(100)에 연결되어 LNG의 흐름 개폐를 결정하는 공급밸브(210);
상기 공급밸브(210)가 연결되어 각각 상기 LNG 저장탱크(100)에서 공급되는 LNG를 분배하는 LNG 분배관(220);
상기 LNG 분배관(220)으로부터 공급되는 LNG를 저장하는 중간저장탱크(230); 및
상기 중간저장탱크(230)로부터 공급되는 LNG의 압력을 높여주는 LNG 펌프(240);를 포함하고,
상기 LNG 저장탱크(100)의 내부에 복수개의 흐름 유도판(150)이 형성되어 있는 것을 특징으로 하는 증발가스 처리장치.
A plurality of LNG storage tanks 100 for storing LNG; and
An LNG supply line 200 for supplying LNG from the LNG storage tank 100 to a ship engine; Including,
The LNG supply line 200
A supply valve 210 connected to the LNG storage tank 100 to determine the flow opening and closing of LNG;
An LNG distribution pipe 220 connected to the supply valve 210 to distribute LNG supplied from the LNG storage tank 100;
An intermediate storage tank 230 for storing LNG supplied from the LNG distribution pipe 220; And
Includes; LNG pump 240 to increase the pressure of the LNG supplied from the intermediate storage tank 230,
Evaporation gas treatment apparatus, characterized in that a plurality of flow guide plate 150 is formed inside the LNG storage tank (100).
제 1항에 있어서,
상기 증발가스 처리장치는 상기 중간저장탱크(230)에 일측이 연결되고, 타측이 상기 LNG 저장탱크(100)에 연결되는 LNG 회수라인(300)를 포함하는 것을 특징으로 하는 증발가스 처리장치.
The method of claim 1,
The apparatus for treating boil-off gas is characterized in that it comprises an LNG recovery line (300) having one side connected to the intermediate storage tank (230) and the other side connected to the LNG storage tank (100).
제 1항에 있어서,
상기 증발가스 처리장치는 상기 중간저장탱크(230)에 일측이 연결되고, 타측이 LNG를 공급받은 제1 LNG 저장탱크(110) 이외에 제2 LNG 저장탱크(120), 제3 LNG 저장탱크(130), 및 제4 LNG 저장탱크(140) 중 선택되는 LNG 저장탱크에 연결되는 LNG 회수라인(300)을 포함하는 증발가스 처리장치.
The method of claim 1,
The boil-off gas treatment apparatus has one side connected to the intermediate storage tank 230, and the other LNG in addition to the first LNG storage tank 110 in which the LNG is supplied, the second LNG storage tank 120 and the third LNG storage tank 130. And an LNG recovery line 300 connected to the LNG storage tank selected from the fourth LNG storage tank 140.
제 2항 또는 제 3항에 있어서,
상기 LNG 회수라인(300)에 상기 LNG 저장탱크(100)로 돌려보내는 증발가스의 양을 조절할 수 있는 수위조절밸브(310)를 포함하는 것을 특징으로 하는 증발가스 처리장치.
4. The method according to claim 2 or 3,
Evaporation gas treatment apparatus comprising a level control valve 310 that can adjust the amount of boil-off gas returned to the LNG storage tank (100) to the LNG recovery line (300).
제 4항에 있어서,
상기 LNG 회수라인(300)으로부터 상기 LNG 저장탱크(100)로 증발가스가 주입될 경우, LNG의 수위 상부로 증발가스가 주입되는 것을 특징으로 하는 증발가스 처리장치.
5. The method of claim 4,
When the boil-off gas is injected into the LNG storage tank 100 from the LNG recovery line 300, the boil-off gas treatment apparatus characterized in that the boil-off gas is injected into the upper level of the LNG.
제 4항에 있어서,
상기 LNG 회수라인(300)으로부터 상기 LNG 저장탱크(100)로 증발가스가 주입될 경우, LNG의 수위 하부로 증발가스가 주입되는 것을 특징으로 하는 증발가스 처리장치.
5. The method of claim 4,
When the boil-off gas is injected into the LNG storage tank 100 from the LNG recovery line 300, the boil-off gas treatment apparatus, characterized in that the boil-off gas is injected into the lower level of the LNG.
삭제delete 제 1항에 있어서,
상기 흐름 유도판(150)이 상기 증발가스가 원활히 이동할 수 있도록 수평면을 기준으로 상방으로 경사져 있는 것을 특징으로 하는 증발가스 처리장치.
The method of claim 1,
Evaporation gas processing apparatus, characterized in that the flow guide plate 150 is inclined upward based on a horizontal plane so that the boil-off gas can move smoothly.
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