WO2017014389A1 - Cuve de stockage de gaz naturel liquéfié, et paroi isolante de cuve de stockage de gaz naturel liquéfié - Google Patents

Cuve de stockage de gaz naturel liquéfié, et paroi isolante de cuve de stockage de gaz naturel liquéfié Download PDF

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Publication number
WO2017014389A1
WO2017014389A1 PCT/KR2016/001164 KR2016001164W WO2017014389A1 WO 2017014389 A1 WO2017014389 A1 WO 2017014389A1 KR 2016001164 W KR2016001164 W KR 2016001164W WO 2017014389 A1 WO2017014389 A1 WO 2017014389A1
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WO
WIPO (PCT)
Prior art keywords
wall
natural gas
storage tank
sealing wall
liquefied natural
Prior art date
Application number
PCT/KR2016/001164
Other languages
English (en)
Korean (ko)
Inventor
표창민
허행성
강봉호
박광준
강중규
Original Assignee
대우조선해양 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 대우조선해양 주식회사 filed Critical 대우조선해양 주식회사
Publication of WO2017014389A1 publication Critical patent/WO2017014389A1/fr

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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
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • B63B25/16—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed heat-insulated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/06—Coverings, e.g. for insulating purposes
    • 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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
    • 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
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation

Definitions

  • the present invention relates to a tank for storing liquefied natural gas, and more particularly, to a membrane-type storage tank having a double insulation wall structure and an insulation wall constituting the same.
  • Natural gas is a fossil fuel containing methane as a main component and a small amount of ethane, propane and the like, and has recently been spotlighted as a low pollution energy source in various technical fields.
  • Natural gas is transported in a gaseous state through onshore or offshore gas piping, or to a distant consumer while stored in an LNG carrier in the form of liquefied liquefied natural gas (LNG).
  • Liquefied natural gas is obtained by cooling natural gas to cryogenic temperature (about -163 °C or less), and its volume is reduced to about 1/600 than natural gas in gas state, and is suitable for long distance transportation through sea.
  • Liquefied natural gas carriers are provided with storage tanks (also called cargo holds) for storing and storing liquefied natural gas cooled by liquefying natural gas.
  • the boiling point of liquefied natural gas is about -162 °C at atmospheric pressure, so the storage tank of liquefied natural gas is a material that can withstand ultra low temperatures such as aluminum steel, stainless steel, and 35% nickel steel to store and store liquefied natural gas safely. It can be manufactured, designed to be resistant to thermal stress and heat shrinkage, and to prevent thermal intrusion.
  • LNG transporter for loading and unloading LNG to land demand by loading sea
  • LNG ReVification Vessel which reloads LNG after recharging stored LNG after arriving at land demand by loading sea, recently unloading LNG
  • FPFP LNG Floating, Production, Storage and Offloading
  • FSRUs LNG Floating Storage and Regasification Units
  • the LNG FPSO is a floating offshore structure used to liquefy the produced natural gas directly from the sea and store it in a storage tank and, if necessary, to transport the LNG stored in the storage tank to an LNG carrier.
  • the LNG FSRU is a floating offshore structure that stores LNG unloaded from LNG carriers in a storage tank at sea far from the land, and then vaporizes LNG as needed to supply land demand.
  • a storage tank for storing LNG in a cryogenic state is installed in an offshore structure such as an LNG carrier, an LNG RV, an LNG FPSO, or an LNG FSRU that transports or stores a liquid cargo such as LNG.
  • These storage tanks can be classified into independent tank type and membrane type according to whether the load of the cargo directly acts on the insulation.
  • Membrane type storage tank is divided into GTT NO 96 type and TGZ Mark III type
  • independent tank type storage tank is divided into MOSS type and IHI-SPB type.
  • the TGZ Mark III type storage tank which is a form of a conventional LNG storage tank, has a structure in which a primary sealing wall, a primary insulating wall, a secondary sealing wall, and a secondary insulating wall are stacked.
  • the primary sealing wall is directly contacted with the liquefied natural gas stored in the storage tank, and is made of a 1.2 mm thick stainless steel membrane, and the secondary sealing wall is also made of stainless steel.
  • the primary heat insulating wall and the secondary heat insulating wall are made of polyurethane foam or the like. At this time, in order to fix the primary insulation wall and the secondary insulation wall to each other, the primary insulation wall, the secondary sealing wall and the secondary insulation wall are glued together.
  • stainless steel is an excellent material that can be used at cryogenic temperatures, but there is a big problem of thermal deformation.
  • the primary sealing wall made of stainless steel is wrinkled to be produced in preparation for thermal deformation.
  • the present invention has been made to solve the above-described problems, the present invention is a liquefied natural gas storage tank configured to prevent the interference with the insulating wall is stacked while the secondary sealing wall is formed of stainless steel and the insulation constituting the same The purpose is to provide a wall.
  • the liquefied natural gas storage tank includes a sealing wall formed of a stainless steel material for sealing a liquefied natural gas stored in an inner space, and joined to the sealing wall and provided to insulate the inner space from the outside. It includes a heat insulation wall, the sealing wall is formed with a corrugation portion to correspond to the thermal deformation, the heat insulation wall is characterized in that the groove is formed corresponding to the corrugation portion so that the wrinkle portion can be inserted.
  • the heat insulating wall is formed in a double upper and lower portion of the sealing wall, the upper sealing wall formed on the upper portion of the sealing wall is a primary sealing wall for primarily sealing the liquefied natural gas stored in the interior space It is characterized by more specific features formed.
  • the primary sealing wall is formed with a corrugation portion corresponding to the thermal deformation.
  • the groove is formed so that the wrinkle portion can be inserted into the heat insulating wall is formed of a chamfer formed by cutting the corners, and the curved portion forming the main curved surface.
  • the curved surface portion is characterized in that the curvature formed with the same curvature formed by the additional portion.
  • the insulating wall of the liquefied natural gas storage tank according to the present invention is provided to insulate the internal space of the liquefied natural gas storage tank from the outside, and is provided with a stainless steel material and formed with a corrugated portion formed with corrugations for thermal deformation. It is bonded with, characterized in that the groove is formed corresponding to the wrinkle portion so that the wrinkle portion can be inserted.
  • the grooves formed to correspond to the pleats are characterized in that the grooves are formed by cutting the edges and the curved portions forming the main curved surface.
  • the curved surface portion is characterized in that the curvature formed with the same curvature formed.
  • the use of stainless steel having excellent performance even at cryogenic temperature as a secondary sealing wall does not cause interference with the primary and secondary insulating walls It is possible to implement a liquefied natural gas storage tank.
  • the processing part can be reduced, thereby minimizing waste space without forming the heat insulating layer, thereby making it more efficient.
  • the chamfering portion is formed in the groove formed in the heat insulation wall, thereby preventing the wrinkle of the sealing wall and the heat insulation wall from interfering.
  • FIG. 1 schematically shows a part of a liquefied natural gas storage tank according to the present invention.
  • Figure 2 shows the secondary sealing wall of the liquefied natural gas storage tank according to the present invention.
  • FIG. 3 is an enlarged view of a portion of the secondary sealing wall of FIG. 2.
  • Figure 4 shows the relationship between the heat insulating wall and the sealing wall according to the present invention.
  • FIG. 1 schematically shows a part of a liquefied natural gas storage tank according to the present invention.
  • the LNG storage tank may include a primary sealing wall 110, a primary insulating wall 120, a secondary sealing wall 200, and a secondary insulating wall ( 300).
  • the primary sealing wall 110 is installed on the primary insulating wall 120 to contact the liquefied natural gas while the liquid liquefied natural gas (LNG) stored in the storage tank.
  • LNG liquid liquefied natural gas
  • the secondary sealing wall 200 is installed between the primary insulating wall 120 and the secondary insulating wall 300 serves to liquid-tighten the liquefied natural gas when the primary sealing wall 110 leaks.
  • a plurality of wrinkles are formed in the primary sealing wall 110 and the secondary sealing wall 200 in order to prevent breakage during shrinkage and extension due to temperature change.
  • the wrinkled portion is stretched or shrunk by a temperature change according to the loading of the liquefied natural gas to prevent breakage due to thermal deformation applied to the primary sealing wall 110 and the secondary sealing wall 200.
  • the primary sealing wall 110 and the secondary sealing wall 200 may be made of stainless steel.
  • FIG. 2 shows the secondary sealing wall 200
  • FIG. 3 shows an enlarged view of a part of the secondary sealing wall 200 shown in FIG. 2.
  • a plurality of wrinkles 210 formed in the secondary sealing wall 200 are formed in a lattice form horizontally and vertically.
  • the pleats 210 of the secondary sealing wall 200 in the present invention are molded to have a first curved surface 211 and a second curved surface 212.
  • the first curved surface 211 having a curved direction in a direction opposite to the second curved surface 212 is formed not only with the second curved surface 212 constituting the main curved surface and the edge is sharply formed. It is manufactured so as to be more suitable for the function as a wrinkle part for thermal deformation response.
  • the wrinkle portion 210 causes interference with these insulating walls. do.
  • grooves corresponding to the pleats 210 of the secondary sealing wall 200 are formed in the insulating wall of the liquefied natural gas storage tank according to the present invention.
  • the wrinkle part 210 of the secondary sealing wall 200 is formed in the direction of the secondary heat insulating wall 300, the groove is formed in the secondary heat insulating wall 300.
  • the present invention is not limited thereto, and the pleats 210 of the secondary sealing wall 200 are formed in the direction of the primary insulation wall 120, and grooves corresponding to the pleats 210 are formed in the primary insulation wall 120. May be
  • the grooves formed in the secondary insulation wall 300 are formed so as to minimize interference with the secondary sealing wall 200 while maximizing the insulation performance by minimizing the size of the grooves.
  • grooves 311 and chamfers and curved portions 312 are formed in the grooves of the secondary insulating wall 300.
  • the curvature 210 has a curvature corresponding to the second curved surface 212 and is formed to have a radius of about 2 to 3 mm larger than the outer edge of the second curved surface 212.
  • the chamfering portion 311 is formed to correspond to the first curved surface 211 of the wrinkled portion 210 of the secondary sealing wall 200, such that the curved portion 312 is the wrinkled portion 210 of the secondary sealing wall 200.
  • the starting point of the groove is not sharply bent, the chamfering portion 311 is formed to form a gentle inclination, the defect caused by contact with the secondary sealing wall 200 and the edge of the groove that may occur in the event of emergency Can be prevented.
  • the primary insulating wall 120 is located below the primary sealing wall 110 to insulate the liquefied natural gas
  • the secondary insulating wall 300 is installed on the inner wall of the liquefied natural gas storage tank is liquefied natural gas Insulate That is, the secondary insulation wall 300 is installed on the inner wall of the liquefied natural gas storage tank, and the secondary sealing wall 200 is positioned on the secondary insulation wall 300.
  • the primary heat insulation wall 120 and the secondary heat insulation wall 300 are formed of a top plate, a bottom plate, and a heat insulating material formed between the top plate and the bottom plate.
  • the upper plate and the lower plate is made of a plywood (Plywood) material, the insulation may be formed of polyurethane foam (Polyurethane Form).
  • the groove formed in the secondary heat insulation wall 300 of the present invention may have a shape in which the top plate and a part of the heat insulating material are removed.
  • first surface 212 second surface

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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)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention concerne une cuve de stockage de gaz naturel liquéfié comprenant: une paroi d'étanchéité composée d'un matériau d'acier inoxydable afin d'assurer l'étanchéité du gaz naturel liquéfié stocké dans un espace interne; et une paroi isolante raccordée à la paroi d'étanchéité, et fournie pour isoler l'espace interne de l'extérieur, la paroi d'étanchéité comprenant une partie ondulée formée pour répondre à une déformation thermique et la paroi isolante présentant une rainure formée pour correspondre à la partie ondulée de sorte que la partie ondulée puisse être insérée à l'intérieur de celle-ci, et par conséquent, même si la paroi d'étanchéité est formée à partir d'acier inoxydable, aucune interférence de celle-ci avec la paroi isolante empilée sur celle-ci n'est générée.
PCT/KR2016/001164 2015-07-22 2016-02-03 Cuve de stockage de gaz naturel liquéfié, et paroi isolante de cuve de stockage de gaz naturel liquéfié WO2017014389A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2015-0103481 2015-07-22
KR1020150103481A KR20170011226A (ko) 2015-07-22 2015-07-22 액화천연가스 저장탱크 및 액화천연가스 저장탱크의 단열벽

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Publication Number Publication Date
WO2017014389A1 true WO2017014389A1 (fr) 2017-01-26

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PCT/KR2016/001164 WO2017014389A1 (fr) 2015-07-22 2016-02-03 Cuve de stockage de gaz naturel liquéfié, et paroi isolante de cuve de stockage de gaz naturel liquéfié

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KR (1) KR20170011226A (fr)
WO (1) WO2017014389A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113958859A (zh) * 2020-07-02 2022-01-21 东成泛泰克株式会社 液化气体储存罐的保护结构及其形成方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102426553B1 (ko) * 2017-12-29 2022-07-28 대우조선해양 주식회사 국부 손상을 방지하는 2차 방벽 단열구조를 포함하는 lng 저장탱크
KR102426555B1 (ko) * 2017-12-29 2022-07-28 대우조선해양 주식회사 단열 성능이 향상된 2차 방벽을 포함하는 lng 저장탱크의 단열구조

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120013226A (ko) * 2011-12-16 2012-02-14 삼성중공업 주식회사 액화 천연가스 저장탱크
KR20120035952A (ko) * 2010-10-07 2012-04-17 삼성중공업 주식회사 화물창
KR20140023689A (ko) * 2012-08-17 2014-02-27 삼성중공업 주식회사 단열방벽 접합구조
KR20150000445A (ko) * 2014-11-28 2015-01-02 삼성중공업 주식회사 액화가스 화물창
KR20150028437A (ko) * 2013-09-06 2015-03-16 대우조선해양 주식회사 극저온 유체 저장용 탱크의 멤브레인 및 이를 구비한 단열시스템

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101280332B1 (ko) 2011-05-27 2013-07-01 삼성중공업 주식회사 액화천연가스 화물창의 단열구조물

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20120035952A (ko) * 2010-10-07 2012-04-17 삼성중공업 주식회사 화물창
KR20120013226A (ko) * 2011-12-16 2012-02-14 삼성중공업 주식회사 액화 천연가스 저장탱크
KR20140023689A (ko) * 2012-08-17 2014-02-27 삼성중공업 주식회사 단열방벽 접합구조
KR20150028437A (ko) * 2013-09-06 2015-03-16 대우조선해양 주식회사 극저온 유체 저장용 탱크의 멤브레인 및 이를 구비한 단열시스템
KR20150000445A (ko) * 2014-11-28 2015-01-02 삼성중공업 주식회사 액화가스 화물창

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113958859A (zh) * 2020-07-02 2022-01-21 东成泛泰克株式会社 液化气体储存罐的保护结构及其形成方法

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