KR20110078197A - Apparatus for exhausting lng leakage for lng tank - Google Patents

Apparatus for exhausting lng leakage for lng tank Download PDF

Info

Publication number
KR20110078197A
KR20110078197A KR1020090134941A KR20090134941A KR20110078197A KR 20110078197 A KR20110078197 A KR 20110078197A KR 1020090134941 A KR1020090134941 A KR 1020090134941A KR 20090134941 A KR20090134941 A KR 20090134941A KR 20110078197 A KR20110078197 A KR 20110078197A
Authority
KR
South Korea
Prior art keywords
lng
discharge
drip tray
tank
unit
Prior art date
Application number
KR1020090134941A
Other languages
Korean (ko)
Inventor
하덕진
이승현
Original Assignee
삼성중공업 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 삼성중공업 주식회사 filed Critical 삼성중공업 주식회사
Priority to KR1020090134941A priority Critical patent/KR20110078197A/en
Publication of KR20110078197A publication Critical patent/KR20110078197A/en

Links

Images

Classifications

    • 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
    • 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
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0157—Compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/037—Handling leaked 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/038—Detecting leaked 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
    • 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

Landscapes

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

Abstract

PURPOSE: An LNG leak discharge device of an LNG tank is provided to prevent the damage of a hull by LNG leaks overflowing from a drip tray and to discharge LNG leaks safely to the outside. CONSTITUTION: An LNG leak discharge device of an LNG tank comprises a drip tray(110) installed to the lower part of an LNG tank(10) to collect LNG leaks, a discharge line(120) offering a course for discharging the LNG leaks collected in the drip tray to the outside of a hull(1), a discharge unit(130) discharging LNG leaks along the discharge line, a detection unit(140) detecting the LNG leaks collected in the drip tray over the appointed quantity, and a control unit receiving sensing signals outputted from the detection unit and controlling the discharge unit.

Description

ＬＮＧ 탱크의 ＬＮＧ 누출물 배출 장치{APPARATUS FOR EXHAUSTING LNG LEAKAGE FOR LNG TANK}LAMP leaking device of LNK tank {APPARATUS FOR EXHAUSTING LNG LEAKAGE FOR LNG TANK}

본 발명은 LNG 탱크로부터 누출되는 다량의 LNG 누출물을 수집하여 외부로 신속하게 배출시키도록 하는 LNG 탱크의 LNG 누출물 배출 장치에 관한 것이다.The present invention relates to a LNG tank leakage discharge apparatus for collecting a large amount of LNG leakage leaked from the LNG tank to be quickly discharged to the outside.

일반적으로, 액화천연가스(Liquefied Natural Gas; 이하, LNG라 함)는 메탄(methane)을 주성분으로 하는 천연가스를 -162℃로 냉각해 그 부피를 6백분의 1로 줄인 무색 투명한 초저온 액체를 말한다.In general, liquefied natural gas (hereinafter referred to as LNG) refers to a colorless transparent cryogenic liquid whose natural gas, which contains methane as its main component, is cooled to -162 ° C and its volume is reduced to one hundredth. .

이러한 LNG가 에너지 자원으로 사용됨에 따라 이 가스를 에너지로 이용하기 위해서 생산기지로부터 수요지의 인수지까지 대량으로 수송할 수 있는 효율적인 운송 방안이 검토되어 왔으며, 이러한 노력의 일환으로 대량의 LNG를 해상으로 수송할 수 있는 LNG 운반선이 개발되었다.As this LNG is used as an energy resource, an efficient transportation method for transporting a large amount from the production base to the destination of the demand site has been considered in order to use this gas as energy. LNG carriers have been developed for transport.

그런데, LNG 운반선에는 초저온상태로 액화시킨 LNG를 보관 및 저장할 수 있는 LNG 탱크가 구비되어야 하는데, 이러한 LNG 탱크에 요구되는 조건이 매우 까다롭다. 즉, LNG는 대기압보다 높은 증기압을 가지며, 대략 -162℃ 정도의 비등 온도 를 갖기 때문에, 이러한 LNG를 안전하게 보관하고 저장하기 위해서 LNG 탱크는 초저온에 견딜 수 있는 재료, 예를 들면 알루미늄강, 스테인리스강, 35% 니켈강 등으로 제작되어야 하며, 기타 열응력 및 열수축에 강하고, 열침입을 막을 수 있는 독특한 인슐레이션 구조로 설계되어야 한다.However, the LNG carrier should be provided with an LNG tank that can store and store the LNG liquefied in the cryogenic state, the conditions required for such an LNG tank is very demanding. That is, since LNG has a vapor pressure higher than atmospheric pressure and a boiling temperature of about -162 ° C, the LNG tank is a material that can withstand ultra low temperatures, such as aluminum steel and stainless steel, to safely store and store such LNG. It shall be made of 35% nickel steel, etc., and shall be designed with a unique insulation structure that is resistant to other thermal stresses and heat shrinkage and prevents heat intrusion.

종래의 LNG 탱크를 첨부된 도면을 참조하여 설명하면 다음과 같다. 도 1은 종래의 기술에 따른 LNG 탱크를 도시한 단면도이다. 도시된 바와 같이, 종래의 기술에 따른 LNG 탱크(10)는 일례로 독립형 탱크 방식을 나타낸 것으로서, 내부에 LNG를 저장하기 위한 저장공간(11)을 가지고, 선체(1)의 내측에 위치하여 다수의 서포트(2)에 의해 지지되며, 외측에 보온재 역할을 하는 인슐레이션(insulation; 20)으로 감싸여진다.Referring to the conventional LNG tank with reference to the accompanying drawings as follows. 1 is a cross-sectional view showing an LNG tank according to the prior art. As shown, the LNG tank 10 according to the prior art is a stand-alone tank type as an example, has a storage space 11 for storing LNG therein, located inside the hull 1 Supported by the support (2) of the outside is wrapped in insulation (insulation) 20, which serves as a thermal insulation.

이러한 LNG 탱크(10)는 어떤 요인에 의해 손상이 발생하여 LNG가 누출될 경우 자신과 인슐레이션(20) 사이를 따라 LNG 누출물(leakage)이 흐르게 되어 드립 트레이(drip tray; 30)라는 소형 용기에 모이게 됨으로써 LNG 누출물에 의한 선체의 손상을 방지한다.When the LNG tank 10 is damaged due to a certain factor and the LNG leaks, the LNG leak flows between itself and the insulation 20, so that the LNG tank 10 is in a small container called a drip tray 30. Gathering prevents damage to the hull by LNG leaks.

이와 같은, 드립 트레이(30)는 도 2에 도시된 바와 같이, LNG 탱크(10)의 펌프웰(pumpwell) 하부와 바닥의 네 모퉁이에 각각 설치됨으로써 LNG 탱크(10)마다 5개가 설치되며, 수집된 LNG 누출물이 기화되도록 한다.As such, as illustrated in FIG. 2, five drip trays 30 are installed at four corners of the pumpwell bottom and the bottom of the LNG tank 10, respectively, so that five drip trays 30 are installed in each LNG tank 10. Allow the LNG leak to vaporize.

상기한 바와 같이, 종래의 기술에 따른 LNG 탱크에 설치된 드립 트레이는 LNG 누설 비율(leak rate), 선박의 힐(heel), 트림(trim) 등의 조건을 설정하여 그 용량이 결정되지만, 이는 LNG 누출물이 적을 경우를 가정하여 설계되기 때문에 LNG FPSO(Floating Production Storage Offloading) 등과 같이 혹독한 해상 환경에서 작업하는 선박의 경우 다량의 LNG 누출이 발생할 수 있고, 이러한 다량의 LNG 누출물은 자연적인 기화만으로 제거가 어려워 드립 트레이를 넘치게 되어 선체에 심각한 손상을 초래하는 문제점을 가지고 있었다.As described above, the drip tray installed in the LNG tank according to the prior art sets the conditions such as the LNG leak rate, the heel of the ship, the trim (trim), the capacity is determined, but this is LNG Designed with low leakage, ships operating in harsh offshore environments, such as LNG Floating Production Storage Offloading (FPSO), can generate large quantities of LNG leaks. Difficult to remove, overflowing the drip tray had a problem causing serious damage to the hull.

본 발명은 상기한 문제점들을 해결하기 위하여 안출된 것으로서, LNG 탱크로부터 다량의 LNG 누출이 발생 시 이러한 다량의 LNG 누출물을 수집하여 외부로 배출시킴으로써 드립 트레이로부터 넘치는 LNG 누출물에 의한 선체의 손상을 방지한다.The present invention has been made in order to solve the above problems, when a large amount of LNG leakage from the LNG tank is collected by the large amount of LNG leakage and discharged to the outside of the hull damage caused by the LNG leakage from the drip tray prevent.

본 발명에 따른 LNG 탱크의 LNG 누출물 배출 장치는, LNG 탱크의 LNG 누출물을 배출시키는 장치로서, LNG 탱크의 하부에 LNG 누출물을 수집하도록 설치되는 드립 트레이와, 드립 트레이에 수집된 LNG 누출물을 선체 외부로 배출시키기 위한 경로를 제공하는 배출라인과, 배출라인을 따라 LNG 누출물을 배출시키는 배출유닛과, 드립 트레이에 일정량 이상의 LNG 누출물을 감지하여 감지신호를 출력하는 감지부와, 감지부로부터 출력된 감지신호를 수신하여 배출유닛을 제어하는 제어부를 포함한다.The LNG leak discharge device of the LNG tank according to the present invention is a device for discharging the LNG leak of the LNG tank, the drip tray is installed to collect the LNG leak in the lower portion of the LNG tank, and the LNG leak collected in the drip tray A discharge line providing a path for discharging water to the outside of the hull, a discharge unit for discharging the LNG leakage along the discharge line, a detector for detecting a predetermined amount of LNG leakage on the drip tray and outputting a detection signal; And a control unit for controlling the discharge unit by receiving the detection signal output from the detection unit.

본 발명은 LNG 탱크로부터 다량의 LNG 누출이 발생 시, 이러한 다량의 LNG 누출물을 수집하여 외부로 신속하게 배출시킴으로써 드립 트레이로부터 넘쳐 흐르는 LNG 누출물에 의한 선체의 손상을 방지하며, LNG 누출물을 안전하게 외부로 배출시키도록 하는 효과를 가진다.According to the present invention, when a large amount of LNG leak occurs from the LNG tank, the large amount of LNG leak is collected and quickly discharged to the outside, thereby preventing damage to the hull by the LNG leak overflowing from the drip tray, and preventing LNG leakage. It has the effect of discharging to the outside safely.

이하, 본 발명의 실시예를 첨부된 도면을 참조하여 상세히 설명하기로 한다. 아울러 본 발명을 설명함에 있어서, 관련된 공지 구성 또는 기능에 대한 구체적인 설명이 본 발명의 요지를 흐릴 수 있다고 판단되는 경우에는 그 상세한 설명을 생략한다.Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

도 3은 본 발명의 일 실시예에 따른 LNG 탱크의 LNG 누출물 배출 장치를 도시한 단면도이고, 도 4는 본 발명의 일 실시예에 따른 LNG 탱크의 LNG 누출물 배출 장치를 도시한 구성도이다. 도시된 바와 같이, 본 발명의 일 실시예에 따른 LNG 탱크의 LNG 누출물 배출 장치(100)는 LNG 탱크(10)의 하부에 설치되는 드립 트레이(drip tray; 110)와, 드립 트레이(110)에 수집된 LNG 누출물을 선체(1) 외부로 배출시키기 위한 경로를 제공하는 배출라인(120)과, 배출라인(120)을 따라 LNG 누출물을 배출시키는 배출유닛(130)과, 드립 트레이(110)에 수집되는 일정량 이상의 LNG 누출물을 감지하는 감지부(140)와, 감지부(140)의 감지신호를 수신받음과 아울러 배출유닛(130)을 제어하는 제어부(150)를 포함할 수 있다.3 is a cross-sectional view showing an LNG leak discharge apparatus of the LNG tank according to an embodiment of the present invention, Figure 4 is a block diagram showing a LNG leak discharge apparatus of the LNG tank according to an embodiment of the present invention. . As shown, the LNG leak discharge apparatus 100 of the LNG tank according to an embodiment of the present invention is a drip tray (110) and the drip tray 110 is installed in the lower portion of the LNG tank (10) A discharge line 120 providing a path for discharging the LNG leaks collected to the outside of the hull 1, a discharge unit 130 for discharging the LNG leaks along the discharge line 120, and a drip tray ( It may include a detection unit 140 for detecting a predetermined amount of LNG leakage collected in the 110, and a control unit 150 for receiving the detection signal of the detection unit 140, and controls the discharge unit 130. .

드립 트레이(110)는 LNG의 저장공간(11)을 가짐과 아울러 선체(1) 내에 서포트(2)로 지지되는 LNG 탱크(10)의 하부에 LNG 탱크(10)로부터 누출되는 LNG 누출물을 수집하도록 설치되고, LNG 탱크(10)로부터 누출되어 LNG 탱크(10)와 인슐레이 션(20)을 따라 흐르는 LNG 누출물이 모이게 되는 장소, 예를 들면, LNG 탱크(10)의 펌프웰(pumpwell) 하부와 바닥의 네 모퉁이에 각각 설치됨으로써 LNG 탱크(10)마다 5개가 설치될 수 있다.The drip tray 110 has LNG storage space 11 and collects LNG leaks from the LNG tank 10 at the lower part of the LNG tank 10 supported by the support 2 in the hull 1. And leaks from the LNG tank (10) and flows along the LNG tank (10) and the insulation (20), where the LNG leaks collect, for example, a pumpwell of the LNG tank (10). By installing each of the four corners of the lower and bottom, five LNG tanks 10 may be installed.

배출라인(120)은 드립 트레이(110)에 수집된 LNG 누출물을 선체(1) 외부로 배출시키는데, 드립 트레이(110)가 다수로 이루어지는 경우 분기된 끝단(121)이 드립 트레이(110) 각각에 연결될 수 있다.The discharge line 120 discharges the LNG leakage collected in the drip tray 110 to the outside of the hull 1. When the drip tray 110 has a plurality of branches, the branched ends 121 each have a drip tray 110. Can be connected to.

한편, 배출라인(120)은 일례로 드립 트레이(110)로부터 선체(1)의 데크(3)까지 연장하여 설치되되, 배출시키는 LNG 누출물이 데크(3)에 닿는 것을 방지하기 위하여 끝단이 데크(3)에서 측방향으로 돌출되도록 설치될 수 있다.On the other hand, the discharge line 120 is installed to extend from the drip tray 110 to the deck 3 of the hull 1, for example, the end of the deck in order to prevent the LNG leakage from coming in contact with the deck (3) It can be installed to protrude laterally in (3).

배출유닛(130)은 배출라인(120)을 따라 LNG 누출물을 배출시키기 위하여 다양한 방식의 펌프가 사용되거나, 본 실시예에서처럼, 작동 유체를 공급하는 작동유체공급부(131)와, 작동유체공급부(131)로부터 공급되는 작동 유체에 의해 작동하여 배출라인(120)을 통해서 LNG 누출물을 배출시키도록 설치되는 누출물배출기(132)를 포함할 수 있다. 여기서, 누출물배출기(132)는 이덕터(eductor) 또는 이젝터(ejector)일 수 있다.The discharge unit 130 is used in various ways to discharge the LNG leakage along the discharge line 120, or in the present embodiment, the working fluid supply unit 131 for supplying a working fluid and the working fluid supply unit ( It may include a leakage discharger 132 is installed to operate by the working fluid supplied from 131 to discharge the LNG leak through the discharge line 120. Here, the leak discharger 132 may be an eductor or an ejector.

작동유체공급부(131)는 누출물배출기(132), 예를 들어 이덕터(132)로 공기를 펌핑하여 불어넣는 펌프가 사용될 수 있으며, 이와 달리, 일례로 누출물배출기(132)에 압축 가스를 공급하는 압축가스 공급부로 이루어질 수 있다.The working fluid supply unit 131 may be a pump for pumping air into the leak discharger 132, for example, the eductor 132, and, alternatively, pressurized gas may be supplied to the leak discharger 132, for example. Compressed gas supply unit may be provided.

누출물배출기(132)는 작동유체공급부(131)로부터 작동 유체가 제 1 유입구(132a)에 공급됨으로써 배출구(132c) 측을 통해서 배출되고, 작동 유체의 유입에 의해 발생되는 내부와 외부간의 압력 차이로 인해 제 2 유입구(132b)에 연결되는 배출라인(120)을 통해서 드립 트레이(110)에 수집된 LNG 누출물을 흡입하여 배출구(132c)와 이에 연결된 배출라인(120)을 통해서 외부로 배출시킨다.The leaked water discharger 132 is discharged through the outlet 132c by supplying the working fluid from the working fluid supply unit 131 to the first inlet 132a, and the pressure difference between the inside and the outside generated by the inflow of the working fluid. Due to the suction of the LNG leakage collected in the drip tray 110 through the discharge line 120 connected to the second inlet 132b to discharge to the outside through the discharge port 132c and the discharge line 120 connected thereto. .

배출유닛(130)은 작동유체공급부(131)로부터 누출물배출기(132), 예를 들어 이덕터 또는 이젝터에 공급되는 작동 유체에 불활성 가스를 공급하는 불활성가스공급부(133)를 더 포함할 수 있다.The discharge unit 130 may further include an inert gas supply unit 133 for supplying an inert gas from the working fluid supply unit 131 to the working fluid supplied to the leaked water discharger 132, for example, the eductor or the ejector. .

불활성가스공급부(133)는 작동유체공급부(131)로부터 공급되는 작동 유체, 일례로 압축 가스와 함께 누출물배출기(132), 예를 들어 이덕터 또는 이젝터에 불활성 가스가 공급되도록 함으로써 LNG 누출물을 외부로 배출 시 반응성을 낮추도록 하여 안전성을 높이는 역할을 하며, 불활성 가스로는 일례로 질소 가스가 사용될 수 있다.The inert gas supply unit 133 supplies an inert gas to the effluent discharger 132, for example, an eductor or an ejector, together with a working fluid supplied from the working fluid supply unit 131, for example, compressed gas. When it is discharged to the outside to reduce the reactivity serves to increase the safety, as an inert gas nitrogen gas may be used as an example.

감지부(140)는 드립 트레이(110)에 일정량 이상의 LNG 누출물, 예를 들면 드립 트레이(110)에 수집된 LNG 누출물이 자연 기화만으로 넘치는 것을 막는데 부족하다고 판단되는 양 이상의 LNG 누출물을 감지하여 제어부(150)로 감지신호를 출력하며, 일례로 저온에서 동작이 가능한 재질로 이루어진 수위 센서가 사용될 수 있다. The detection unit 140 detects an amount of LNG leaks in the drip tray 110 more than a certain amount, for example, an amount of LNG leaks determined to be insufficient to prevent the LNG leaks collected in the drip tray 110 from overflowing with only natural vaporization. Sensing and outputting a detection signal to the controller 150, for example, a water level sensor made of a material capable of operating at low temperatures may be used.

제어부(150)는 감지부(140)로부터 출력된 감지신호를 수신받아서 드립 트레이(110)에 LNG 누출물의 강제 배출이 필요하다고 판단되면, 배출유닛(130)을 구동시키는데, 일례로 작동유체공급부(131)와 불활성가스공급부(133)로부터 작동 유체와 불활성 가스 각각의 공급을 제어함으로써 배출유닛(130)의 구동을 제어할 수 있 다. When the controller 150 receives the detection signal output from the detector 140 and determines that forced discharge of the LNG leak is required in the drip tray 110, the controller 150 drives the discharge unit 130, for example, a working fluid supply unit ( It is possible to control the driving of the discharge unit 130 by controlling the supply of the working fluid and the inert gas from the 131 and the inert gas supply unit 133.

배출유닛(130)은 작동유체공급부(131)와 불활성가스공급부(133) 각각으로부터 작동 유체와 불활성 가스의 공급을 개폐시키기 위하여 이들이 공급되는 라인(미도시)상에 제어부(150)에 의해 제어되는 제 1 및 제 2 밸브(131a,133a)가 각각 설치될 수 있으며, 제어부(150)는 제 1 및 제 2 밸브(131a,133a)의 제어에 의해 배출유닛(130)의 구동을 제어할 수도 있다.The discharge unit 130 is controlled by the controller 150 on a line (not shown) to which they are supplied to open and close the supply of the working fluid and the inert gas from each of the working fluid supply unit 131 and the inert gas supply unit 133. The first and second valves 131a and 133a may be installed, respectively, and the controller 150 may control the driving of the discharge unit 130 by the control of the first and second valves 131a and 133a. .

이와 같은 구성을 가지는 본 발명에 따른 LNG 탱크의 LNG 누출물 배출 장치의 작동을 예로 들어 설명하면 다음과 같다.Referring to the operation of the LNG leakage discharge device of the LNG tank according to the present invention having such a configuration as an example.

LNG 탱크(10)로부터 LNG의 누출이 발생하게 되면, LNG 누출물이 LNG 탱크(10)와 인슐레이션(20)을 따라 드립 트레이(110)에 수집된다. When the leakage of LNG from the LNG tank 10 occurs, the LNG leak is collected in the drip tray 110 along the LNG tank 10 and the insulation (20).

드립 트레이(110)에 수집된 LNG 누출물의 양이 감지부(140)가 감지하지 못할 정도인 경우, 드립 트레이(110) 내의 LNG 누출물은 자연 기화로 충분히 제거되지만, 만일, LNG 누출물이 감지부(140)에 의해 감지될 정도로 많은 경우 감지부(140)가 이를 감지하여 출력되는 감지신호를 제어부(150)가 수신받아 배출유닛(130)을 구동시킨다. 이 때, 제어부(150)는 드립 트레이(110) 중에서 어느 하나에 설치된 감지부(140)로부터 감지신호가 수신되더라도 배출유닛(130)을 구동시킬 수 있다.If the amount of LNG leak collected in the drip tray 110 is not enough to be detected by the detector 140, the LNG leak in the drip tray 110 is sufficiently removed by natural vaporization, but if the LNG leak is detected When the detection unit 140 detects this, the controller 150 receives the detection signal outputted by the controller 140 to drive the discharge unit 130. At this time, the controller 150 may drive the discharge unit 130 even if a detection signal is received from the detector 140 installed in any one of the drip trays 110.

제어부(150)의 제어에 의해 배출유닛(130), 예를 들면, 작동유체공급부(131) 및 불활성가스공급부(133)로부터 작동 유체와 불활성 가스가 누출물배출기(132), 예를 들어 이덕터 또는 이젝터로 공급되면, 드립 트레이(110) 내의 LNG 누출물이 배출라인(120)을 통해서 외부로 배출되며, 이 때, LNG 누출물이 불활성 가스, 일례 로 질소 가스와 혼합되어 배출됨으로써 반응성이 낮아져서 안전하게 외부로 배출된다. Under the control of the control unit 150, the working fluid and the inert gas are discharged from the discharge unit 130, for example, the working fluid supply unit 131 and the inert gas supply unit 133, for example, the eductor Alternatively, when supplied to the ejector, the LNG leak in the drip tray 110 is discharged to the outside through the discharge line 120, at this time, the LNG leak is mixed with the inert gas, for example nitrogen gas is discharged to lower the reactivity It is safely discharged to the outside.

한편, 제어부(150)는 작동유체공급부(131) 및 불활성가스공급부(133)의 직접적인 동작 제어를 통해 작동 유체와 불활성 가스의 공급을 제어할 뿐만 아니라, 제 1 및 제 2 밸브(131a,133a)의 제어에 의해서도 작동 유체와 불활성 가스의 공급을 제어할 수 있으며, 필요에 따라 불활성 가스를 제외한 작동 유체만의 공급을 가능하도록 할 수도 있다. On the other hand, the controller 150 not only controls the supply of the working fluid and the inert gas through the direct operation control of the working fluid supply unit 131 and the inert gas supply unit 133, but also the first and second valves 131a and 133a. The supply of the working fluid and the inert gas can also be controlled by the control of, and if necessary, the supply of the working fluid except the inert gas can be enabled.

이상과 같은 본 발명의 실시예에 따르면, LNG 탱크로부터 다량의 LNG 누출이 발생 시, 이러한 다량의 LNG 누출물을 수집하여 외부로 신속하게 배출시킴으로써 드립 트레이로부터 넘쳐 흐르는 LNG 누출물에 의한 선체의 손상을 방지하며, LNG 누출물을 안전하게 외부로 배출시키도록 한다.According to the embodiment of the present invention as described above, when a large amount of LNG leakage from the LNG tank, such a large amount of LNG leakage is collected and quickly discharged to the outside damage of the hull by the LNG leakage overflowed from the drip tray To ensure safe discharge of LNG leaks.

이상에서와 같이, 본 발명의 상세한 설명에서 구체적인 실시예에 관해 설명하였으나, 본 발명의 기술이 당업자에 의하여 용이하게 변형 실시될 가능성이 자명하며, 이러한 변형된 실시예들은 본 발명의 특허청구범위에 기재된 기술사상에 포함된다할 것이다.While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. And will be included in the described technical idea.

도 1은 종래의 기술에 따른 LNG 탱크를 도시한 단면도이고,1 is a cross-sectional view showing an LNG tank according to the prior art,

도 2는 종래의 기술에 따른 LNG 탱크의 드립 트레이 배열 구조를 도시한 평면도이고,Figure 2 is a plan view showing a drip tray arrangement of the LNG tank according to the prior art,

도 3은 본 발명의 일 실시예에 따른 LNG 탱크의 LNG 누출물 배출 장치를 도시한 단면도이고,3 is a cross-sectional view showing a LNG leak discharge apparatus of the LNG tank according to an embodiment of the present invention,

도 4는 본 발명의 일 실시예에 따른 LNG 탱크의 LNG 누출물 배출 장치를 도시한 구성도이다.Figure 4 is a block diagram showing the LNG leakage discharge device of the LNG tank according to an embodiment of the present invention.

<도면의 주요 부분에 대한 부호의 설명><Explanation of symbols for the main parts of the drawings>

1 : 선체 2 : 서포트1: hull 2: support

3 : 데크 10 : LNG 탱크 3: deck 10: LNG tank

11 : 저장공간 20 : 인슐레이션11: storage 20: insulation

110 : 드립 트레이 120 : 배출라인110: drip tray 120: discharge line

121 : 분기된 끝단 130 : 배출유닛121: branched end 130: discharge unit

131 : 작동유체공급부 131a : 제 1 밸브131: working fluid supply unit 131a: first valve

132 : 누출물배출기 132a : 제 1 유입구132: leaking water discharger 132a: first inlet

132b : 제 2 유입구 132c : 배출구132b: second inlet 132c: outlet

133 : 불활성가스공급부 133a : 제 2 밸브133: inert gas supply unit 133a: second valve

140 : 감지부 150 : 제어부140: detection unit 150: control unit

Claims (7)

LNG 탱크의 LNG 누출물을 배출시키는 장치로서,An apparatus for discharging LNG leaks from an LNG tank, 상기 LNG 탱크의 하부에 LNG 누출물을 수집하도록 설치되는 드립 트레이와,A drip tray installed at a lower portion of the LNG tank to collect LNG leaks; 상기 드립 트레이에 수집된 LNG 누출물을 선체 외부로 배출시키기 위한 경로를 제공하는 배출라인과,A discharge line providing a path for discharging the LNG leak collected in the drip tray to the outside of the hull; 상기 배출라인을 따라 LNG 누출물을 배출시키는 배출유닛과,A discharge unit for discharging the leakage of LNG along the discharge line; 상기 드립 트레이에 일정량 이상의 LNG 누출물을 감지하여 감지신호를 출력하는 감지부와,A detector for detecting a LNG leak of a predetermined amount or more on the drip tray and outputting a detection signal; 상기 감지부로부터 출력된 감지신호를 수신하여 상기 배출유닛을 제어하는 제어부Control unit for controlling the discharge unit by receiving the detection signal output from the detection unit 를 포함하는 LNG 탱크의 LNG 누출물 배출 장치.LNG leaking device of the LNG tank comprising a. 제 1 항에 있어서,The method of claim 1, 상기 드립 트레이는,The drip tray, 상기 LNG 탱크의 하부에 다수로 설치되며, 상기 배출라인의 분기된 끝단이 각각 연결되는 LNG 탱크의 LNG 누출물 배출 장치.Installed in the lower portion of the LNG tank, LNG leakage discharge device of the LNG tank is connected to each branched end of the discharge line. 제 1 항 또는 제 2 항에 있어서,The method according to claim 1 or 2, 상기 배출라인은,The discharge line, 상기 드립 트레이로부터 상기 선체의 데크에서 측방향으로 돌출되도록 설치되는 LNG 탱크의 LNG 누출물 배출 장치.LNG leakage of the LNG tank is installed so as to protrude laterally from the deck of the hull from the drip tray. 제 1 항에 있어서,The method of claim 1, 상기 배출유닛은,The discharge unit, 작동 유체를 공급하는 작동유체공급부와,A working fluid supply part for supplying a working fluid; 상기 작동유체공급부로부터 공급되는 작동 유체에 의해 작동하여 상기 배출라인을 통해서 LNG 누출물을 배출시키도록 설치되는 누출물배출기Leakage discharger is installed by the operating fluid supplied from the working fluid supply to discharge the LNG leak through the discharge line 를 포함하는 LNG 탱크의 LNG 누출물 배출 장치.LNG leaking device of the LNG tank comprising a. 제 4 항에 있어서,The method of claim 4, wherein 상기 작동유체공급부는,The working fluid supply unit, 상기 누출물배출기에 압축 가스를 공급하는 LNG 탱크의 LNG 누출물 배출 장치.LNG leaking device of the LNG tank for supplying compressed gas to the leaking water discharge. 제 4 항에 있어서,The method of claim 4, wherein 상기 배출유닛은,The discharge unit, 상기 작동유체공급부로부터 상기 누출물배출기에 공급되는 작동 유체에 불활성 가스를 공급하는 불활성가스공급부An inert gas supply unit for supplying an inert gas to the working fluid supplied from the working fluid supply unit to the leaked water discharge unit 를 더 포함하는 LNG 탱크의 LNG 누출물 배출 장치.LNG leaking device of the LNG tank further comprising. 제 4 항 내지 제 6 항 중 어느 한 항에 있어서,The method according to any one of claims 4 to 6, 상기 누출물배출기는 이덕터(educator) 또는 이젝터(ejector)인The leaking ejector is an eductor or ejector LNG 탱크의 LNG 누출물 배출 장치.LNG leaking device of LNG tank.
KR1020090134941A 2009-12-30 2009-12-30 Apparatus for exhausting lng leakage for lng tank KR20110078197A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090134941A KR20110078197A (en) 2009-12-30 2009-12-30 Apparatus for exhausting lng leakage for lng tank

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090134941A KR20110078197A (en) 2009-12-30 2009-12-30 Apparatus for exhausting lng leakage for lng tank

Publications (1)

Publication Number Publication Date
KR20110078197A true KR20110078197A (en) 2011-07-07

Family

ID=44917686

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020090134941A KR20110078197A (en) 2009-12-30 2009-12-30 Apparatus for exhausting lng leakage for lng tank

Country Status (1)

Country Link
KR (1) KR20110078197A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105523309A (en) * 2014-09-29 2016-04-27 江南造船(集团)有限责任公司 Insulation structure of type-B independent liquid cargo tank on liquefied gas carrier
KR20160127481A (en) * 2015-04-27 2016-11-04 대우조선해양 주식회사 Protection system for structure inside the hull of a vessel
KR20160128626A (en) * 2015-04-29 2016-11-08 대우조선해양 주식회사 Protection system for hull side shell of a vessel and protecting method for the same
KR20160128627A (en) * 2015-04-29 2016-11-08 대우조선해양 주식회사 Protection system for hull of flng
KR20160128628A (en) * 2015-04-29 2016-11-08 대우조선해양 주식회사 Protection system for hull of flng and flng comprising the same
KR20170134052A (en) * 2016-05-27 2017-12-06 현대중공업 주식회사 A Treatment System of Gas
KR20190040817A (en) * 2017-10-11 2019-04-19 삼성중공업 주식회사 Apparatus for processing cryogenic liquid leakage
KR102480657B1 (en) * 2021-09-14 2022-12-22 대우조선해양 주식회사 System for treating leakage liquid for lng cargo tank and vessel including the same
KR20230009136A (en) * 2021-07-08 2023-01-17 정경태 Leaked lpg gas discharging appartatus of lpg ship engine room

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105523309A (en) * 2014-09-29 2016-04-27 江南造船(集团)有限责任公司 Insulation structure of type-B independent liquid cargo tank on liquefied gas carrier
KR20160127481A (en) * 2015-04-27 2016-11-04 대우조선해양 주식회사 Protection system for structure inside the hull of a vessel
KR20160128626A (en) * 2015-04-29 2016-11-08 대우조선해양 주식회사 Protection system for hull side shell of a vessel and protecting method for the same
KR20160128627A (en) * 2015-04-29 2016-11-08 대우조선해양 주식회사 Protection system for hull of flng
KR20160128628A (en) * 2015-04-29 2016-11-08 대우조선해양 주식회사 Protection system for hull of flng and flng comprising the same
KR20170134052A (en) * 2016-05-27 2017-12-06 현대중공업 주식회사 A Treatment System of Gas
KR20190040817A (en) * 2017-10-11 2019-04-19 삼성중공업 주식회사 Apparatus for processing cryogenic liquid leakage
KR20230009136A (en) * 2021-07-08 2023-01-17 정경태 Leaked lpg gas discharging appartatus of lpg ship engine room
KR102480657B1 (en) * 2021-09-14 2022-12-22 대우조선해양 주식회사 System for treating leakage liquid for lng cargo tank and vessel including the same

Similar Documents

Publication Publication Date Title
KR20110078197A (en) Apparatus for exhausting lng leakage for lng tank
KR101618697B1 (en) Pump tower of liquified gas storage tank
KR101788750B1 (en) Offshore structure and it&#39;s loading/unloading method, and cool down method of lng storage tank
KR101258932B1 (en) LNG regasification plant
KR102177273B1 (en) Gas Replacement System of Liquefied Gas Storage Tank and Ship having the same
KR101606701B1 (en) Container Ship And Arrangement Method Of The Same
KR20140075285A (en) Liqueifed gas drip discharging apparatus
KR101670866B1 (en) Apparatus for monitoring an independence type storage tank
KR20110007450A (en) A co2 carrying ship
KR102480657B1 (en) System for treating leakage liquid for lng cargo tank and vessel including the same
KR200480972Y1 (en) Cryogenic fluid hull outside drain structure of lng fpso and lng carrier including the same
KR20160148309A (en) Collecting apparatus of leakage for liquid gas storage tank and marine structure including the same
KR101577788B1 (en) Balasting system and floating marine structure having the system
KR20140055665A (en) Sump well structure of liquefied gas cargo tank
KR20150059940A (en) Drip tray structure for lng cargo tank
KR200473638Y1 (en) Independence type storage tank structure
KR20190054847A (en) Liquefied gas carrier having independent cargo containment system
KR20140017165A (en) Unloading system for lng carrier
KR100701398B1 (en) Spray device arranged in a turret of a lng regasification ship and method for preventing hull deformation using the spray device
KR20130022926A (en) Balasting system and floating marine structure having the system
KR20140004355A (en) Apparatus for bilge treating
KR20150116255A (en) Loading system and method for lng storage tank
KR20150004184A (en) Leaking LNG collection structure for LNG tank and Marine structure having the LNG tank
KR20150115095A (en) A Treatment System of Liquefied Gas
KR101577791B1 (en) Balasting system and floating marine structure having the system

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application