WO2022270674A1 - Membrane asymétrique, structure d'agencement de membrane utilisant ladite membrane asymétrique et réservoir de stockage de gaz liquéfié comprenant ladite structure d'agencement de membrane - Google Patents

Membrane asymétrique, structure d'agencement de membrane utilisant ladite membrane asymétrique et réservoir de stockage de gaz liquéfié comprenant ladite structure d'agencement de membrane Download PDF

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Publication number
WO2022270674A1
WO2022270674A1 PCT/KR2021/009470 KR2021009470W WO2022270674A1 WO 2022270674 A1 WO2022270674 A1 WO 2022270674A1 KR 2021009470 W KR2021009470 W KR 2021009470W WO 2022270674 A1 WO2022270674 A1 WO 2022270674A1
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WIPO (PCT)
Prior art keywords
membrane
storage tank
extension
asymmetrical
liquefied gas
Prior art date
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PCT/KR2021/009470
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English (en)
Korean (ko)
Inventor
윤용근
임기호
오병택
조용범
이영범
한해철
윤은영
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한국가스공사
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Publication of WO2022270674A1 publication Critical patent/WO2022270674A1/fr

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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
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/025—Bulk storage in barges or on ships
    • F17C3/027—Wallpanels for so-called membrane tanks
    • 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
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/011—Reinforcing means
    • F17C2203/012—Reinforcing means on or in the wall, e.g. ribs
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/21—Shaping processes
    • F17C2209/2181—Metal working processes, e.g. deep drawing, stamping or cutting
    • 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/221—Welding
    • 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/232—Manufacturing of particular parts or at special locations of walls
    • 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/011—Improving strength
    • 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
    • F17C2270/0107—Wall panels

Definitions

  • the present invention relates to a membrane installed in a membrane-type storage tank to form a sealing layer, and more particularly, to an asymmetrical membrane installed at a corner between two adjacent surfaces of a storage tank.
  • the present invention relates to a membrane array structure using the asymmetric membrane and a liquefied gas storage tank including the membrane array structure.
  • Natural gas is transported in a gaseous state through onshore or offshore gas pipelines, or transported to a remote consumer while being stored in an LNG storage tank of an LNG carrier in a state of liquefied natural gas (LNG).
  • Liquefied natural gas is obtained by cooling natural gas to a cryogenic temperature (approximately -163 ° C or less), and its volume is reduced to approximately 1/600 of that of gaseous natural gas, making it very suitable for long-distance transportation through sea.
  • An LNG carrier is provided with a storage tank (also referred to as a cargo hold) capable of storing and storing liquefied natural gas obtained by cooling and liquefying natural gas. Since the boiling point of liquefied natural gas is about -162°C at atmospheric pressure, the storage tank for liquefied natural gas is made of materials that can withstand ultra-low temperatures, such as aluminum steel, stainless steel, and 36% nickel steel, to safely store and store liquefied natural gas. It can be manufactured, and it is designed with a structure that is strong against thermal stress and heat shrinkage and can prevent heat intrusion.
  • LNG storage tanks for storing liquefied natural gas are, for example, LNG FPSO (Floating, Production, Storage and Offloading) or LNG FSRU (Floating , Storage, and Regasification Unit) are also installed on floating offshore structures.
  • LNG FPSO Floating, Production, Storage and Offloading
  • LNG FSRU Floating , Storage, and Regasification Unit
  • the LNG FPSO is a floating offshore structure used to directly liquefy produced natural gas at sea, store it in a storage tank, and transport the LNG stored in the storage tank to an LNG carrier when necessary.
  • the LNG FSRU is a floating offshore structure that stores LNG unloaded from an LNG carrier at sea far from the land in a storage tank and vaporizes the LNG as needed to supply it to land demand.
  • LNG storage tanks can be classified into an independent type and a membrane type depending on whether the load of the cargo directly acts on the insulation material.
  • a typical membrane-type LNG storage tank includes an insulation layer to prevent external heat from entering the inside of the cargo hold so that the liquefied natural gas is not heated, and a sealing layer to prevent the liquefied natural gas from leaking out of the storage tank. do. Even if the sealing layer is damaged, the sealing layer of the cargo hold is composed of a double layer so that the other sealing layer can prevent leakage of liquefied natural gas.
  • a heat insulating layer and a sealing layer when manufacturing a membrane type LNG storage tank, first, a plurality of insulating panels are combined on the inner wall of the hull to form a heat insulating layer, and a plurality of sealing membranes are installed on the plurality of insulating panels to seal. Carry out the process of forming layers.
  • a typical membrane type LNG storage tank is designed to have an octagonal prism shape as a whole in order to cope with sloshing load. This is to distribute the stress concentration by designing each corner of the inner hull to form a storage tank at an obtuse angle.
  • the sealing layer is made of a corrugated membrane to respond to cryogenic heat shrinkage in all areas of the cargo hold.
  • the present invention in order to solve the conventional problems as described above, in forming a sealing layer by bonding a plurality of membranes, is installed at the corner between two adjacent surfaces of the storage tank to form a sealing layer It is intended to provide an asymmetric membrane that can simplify the arrangement of the membrane.
  • the present invention is to provide a membrane array structure using the asymmetric membrane and a liquefied gas storage tank including the membrane array structure.
  • a membrane for forming a sealing layer in a storage tank capable of storing liquefied gas, a first extension extending in one direction, and different from the first extension and a second extension portion extending in the direction, wherein an extension length of the first extension portion is different from an extension length of the second extension portion, so that the first extension portion and the second extension portion are provided with an asymmetric membrane forming an asymmetric shape. It can be.
  • the asymmetric membrane further includes a connection portion interposed between the first extension portion and the second extension portion to connect the first extension portion and the second extension portion, wherein the first extension portion is interposed between the first extension portion and the second extension portion.
  • the part and the second extension part may have a planar shape, and the connection part may have a curved shape.
  • the asymmetrical membrane may include one or more corrugations.
  • the wrinkle part may be formed to extend from the first extension part to the second extension part.
  • a central wrinkle part located in the middle of the wrinkle part may extend longer than two edge wrinkle parts located at both edges of the wrinkle part.
  • the asymmetric membrane as described above is used in the storage tank
  • a membrane arrangement structure may be provided that is installed across the first surface and the second surface of the membrane so that the membranes installed on the first surface and the membranes installed on the second surface are asymmetrical.
  • the plurality of asymmetric membranes extend horizontally at a distance from each other along an edge line where an edge of the first surface and an edge of the second surface of the storage tank are adjacent to each other. can be arranged so that
  • the plurality of asymmetrical membranes may be oriented such that the first extensions alternately face opposite sides.
  • the storage tank includes a front surface, a rear surface, a left surface, a right surface, an upper surface, and a lower surface, wherein the first surface is the front surface or the rear surface, and the second surface is It may be the left side or the right side.
  • a storage tank having a polyhedron shape and storing liquefied gas, which is installed on the inner wall of the hull to block heat inflow from the outside, and a natural gas sealed to prevent leakage to the outside of the storage tank and a sealing layer comprising a plurality of asymmetrical membranes installed at corners connecting adjacent first and second surfaces of the storage tank, the asymmetrical membranes extending in one direction. It includes a first extension part and a second extension part extending in a direction different from the first extension part, wherein the extension length of the first extension part is different from the extension length of the second extension part, so that the first extension part
  • the second extension part may be provided with a storage tank forming an asymmetrical shape.
  • an asymmetrical membrane that can be installed at a corner between two adjacent surfaces of a storage tank, a membrane arrangement structure using the asymmetrical membrane, and A liquefied gas storage tank including the membrane array structure may be provided.
  • the asymmetric membrane of the present invention it is possible to simplify the arrangement of the membrane forming the sealing layer inside the storage tank.
  • the asymmetrical membrane is not applied to the corner of the storage tank, it is possible to suppress the diversification of the shape of the membrane, so that the type of membrane required for manufacturing the storage tank can be reduced.
  • the product group of the membrane is reduced, which is advantageous in terms of construction management when manufacturing the storage tank, and the type of mold for manufacturing the membrane can be reduced, so the manufacturing cost of the membrane and the storage tank can be reduced.
  • FIG. 1 is a perspective view of a general type of liquefied gas storage tank having an inclined surface
  • FIG. 2 is a development view of a general type of liquefied gas storage tank having an inclined surface
  • FIG. 3 is a perspective view of an asymmetrical membrane installed at a corner between two adjacent surfaces of a liquefied gas storage tank according to an embodiment of the present invention
  • FIG. 4 is a partially developed view of a liquefied gas storage tank for explaining a membrane arrangement structure using an asymmetric membrane according to an embodiment of the present invention
  • FIG. 5 is a partially developed view of a liquefied gas storage tank for explaining a general membrane arrangement structure that does not utilize an asymmetrical membrane;
  • FIG. 6 is a partial internal perspective view of a liquefied gas storage tank for explaining a membrane arrangement structure using an asymmetrical membrane according to an embodiment of the present invention.
  • the liquefied gas storage tank may be used to store liquid cargo including hydrocarbon components that are liquefied at cryogenic temperatures, such as LNG and LPG.
  • the liquefied gas storage tank may be a membrane type tank having a sealed and heat insulating barrier to store cryogenic liquid cargo such as LNG.
  • the sealing and thermal insulation barrier is a wall surface in all directions of the storage tank, that is, the front surface, the rear surface, the left side, the right side, It is stacked on both the upper and lower surfaces.
  • sealing and thermal insulation barriers are laminated on all the inclined surfaces, that is, the upper left inclined surface, the upper right inclined surface, the lower left inclined surface, and the lower right inclined surface.
  • the sealing and thermal insulation barrier of the membrane-type LNG storage tank for storing LNG may include a thermal insulation layer installed on the inner wall of the hull and a sealing layer installed on the thermal insulation layer.
  • the insulation layer is to prevent external heat from penetrating into the inside of the cargo hold so that the liquefied natural gas is not heated.
  • the sealing layer is to prevent liquefied natural gas from leaking out of the storage tank, and the sealing structure of the cargo hold is doubled so that even if one sealing layer is damaged, the other sealing layer can prevent leakage of liquefied natural gas. That is, the sealing layer includes a primary sealing layer and a secondary sealing layer.
  • the secondary sealing layer may be installed to be interposed inside the heat insulating layer, or may be installed to be laminated together with the primary sealing layer on the surface of the heat insulating layer.
  • An asymmetrical membrane according to an embodiment of the present invention can be used for any type of storage tank.
  • a plurality of secondary thermal insulation panels are bonded to the inner wall of the hull to form a secondary thermal insulation layer, and the secondary thermal insulation layer formed by the secondary thermal insulation panels is made of metal.
  • a sealing member such as a membrane or triplex is installed to form a secondary sealing layer
  • a primary insulation panel is installed on the secondary sealing layer formed by the sealing member to form a primary insulation layer
  • a primary insulation layer is formed on the primary insulation panel.
  • it may be manufactured through a process of forming a primary sealing layer by installing a membrane made of a material such as SUS on the primary thermal insulation layer formed by the.
  • a plurality of thermal insulation panels are bonded to the inner wall of the hull in a single layer or multiple layers to form a thermal insulation layer, and a plurality of thermal insulation panels
  • it may be manufactured through a process of forming a first and second sealing layer by installing a double membrane made of a material such as SUS on the formed heat insulating layer.
  • An asymmetrical membrane according to an embodiment of the present invention may be used for either or both of the above-mentioned primary sealing layer and secondary sealing layer.
  • an asymmetric membrane according to an embodiment of the present invention is used for the primary sealing layer, but is not limited thereto.
  • a liquefied gas storage tank in which a sealing layer is formed using an asymmetrical membrane may be installed in a hull of a marine structure.
  • offshore structures include ships such as various liquefied gas carriers such as LNG carriers, LNG propulsion ships using LNG as fuel, and LNG shuttles, as well as LNG FPSO (LNG Floating, Production, Storage and Off- loading), LNG FSRU (LNG Floating Storage and Regasification Unit), LNG FRU (LNG Floating and Regasification Unit), BMPP (Barge Mounted Power Plant), FSPP (Floating and Storage Power Plant), etc. .
  • LNG FPSO LNG Floating, Production, Storage and Off- loading
  • LNG FSRU LNG Floating Storage and Regasification Unit
  • LNG FRU LNG Floating and Regasification Unit
  • BMPP Barge Mounted Power Plant
  • FSPP Floating and Storage Power Plant
  • FIG. 1 shows the appearance of a general membrane type liquefied gas storage tank 10 having an inclined surface for reducing impact due to sloshing load, and FIG. A development is shown.
  • the liquefied gas storage tank 10 has a front surface 11 toward the bow of the hull, a rear surface 12 toward the stern of the hull, and a left side toward the port side of the hull. It includes a face 13, a right face 14 facing the starboard side of the hull, an upper face 15 facing upward of the hull, and a lower face 16 facing the bottom of the hull.
  • the liquefied gas storage tank 10 has an upper left inclined surface 17a formed inclined between the upper surface 15 and the left surface 13, and an upper part formed inclined between the upper surface 15 and the right surface 14.
  • the liquefied gas storage tank 10 may be composed of, for example, 10 surfaces.
  • the present invention is not limited due to the shape of the liquefied gas storage tank 10, and the present invention It can also be applied to a liquefied gas storage tank of a different form than that illustrated in FIGS. 1 and 2 .
  • the front surface 11 and the rear surface 12 of the liquefied gas storage tank 10 form an approximately octagonal shape, and the respective inclined surfaces 17a, 17b, 18a, and 18b are connected to each other.
  • a complex membrane arrangement structure has to be formed.
  • the corrugated membrane when the corrugated membrane is simply oriented in the horizontal or vertical direction on all surfaces of the liquefied gas storage tank 10, the front surface 11 and the rear surface 12 and each inclined surface 17a, 17b, 18a , 18b), there is a possibility that the sealing layer may be damaged due to stress concentration in the area where the three surfaces are connected or the area where the three surfaces are connected.
  • an asymmetrical membrane 30 (see FIG. 3) at the corner between two adjacent surfaces of the liquefied gas storage tank 10, a plurality of membranes are bonded to form a sealing layer.
  • the asymmetrical membrane 30 is, for example, a corner portion between the front surface 11 and the left surface 13 of the surfaces forming the liquefied gas storage tank 10, the front surface 11 and the right surface 14 It may be arranged at a corner portion between, a corner portion between the rear face 12 and the left face 13, and a corner portion between the rear face 12 and the right face 14.
  • the membrane arrangement structure arranged on the two surfaces connected through the corner portion can be made asymmetric (see Figs. 4 and 6).
  • FIG. 3 is a perspective view of an asymmetrical membrane 30 installed at a corner between two adjacent surfaces of a liquefied gas storage tank 10 according to an embodiment of the present invention.
  • the asymmetrical membrane 30 includes a first extension 31 formed in a plane, and a second extension formed in a plane and extending in a direction different from the first extension 31. (32) and a connecting portion (33) formed in a curved surface to connect the first extension portion (31) and the second extension portion (32).
  • the asymmetric membrane 30 has the first extension part 31 and the second extension part centered on the connection part 33 ( 32) is formed to have an asymmetrical shape.
  • An angle between the first extension part 31 and the second extension part 32 may be, for example, about 90 degrees.
  • the angle formed by the first extension 31 and the second extension 32 may have an angle other than 90 degrees.
  • Asymmetrical membrane 30 may have one or more corrugations 35 , 36 , 37 . 3, three corrugated parts 35, 36 and 37 are formed to extend in parallel.
  • the central wrinkle part 35 located in the middle of the three wrinkle parts may extend longer than the two edge wrinkle parts 36 and 37 located at both edges of the three wrinkle parts.
  • the number and shape of wrinkles shown in FIG. 3 are just examples, and the asymmetric membrane 30 of the present invention may have various shapes and numbers of wrinkles as needed.
  • FIG. 4 shows a partially developed view of a liquefied gas storage tank for explaining the membrane arrangement structure using the asymmetrical membrane 30 of the present invention.
  • FIG. 5 shows a partially developed view of a liquefied gas storage tank for explaining a general membrane arrangement structure using a symmetric membrane 30A instead of an asymmetric membrane.
  • the sealing layer (eg, the primary sealing layer) is made of a plurality of membranes bonded to each other by welding, for example, an asymmetrical membrane 30, a corner membrane 60, and a corrugated membrane 40 and a flat membrane 50 .
  • the asymmetrical membrane 30 is arranged in a horizontal direction so as to extend over two adjacent surfaces (for example, the front surface 11 and the left surface 13) of the liquefied gas storage tank 10 .
  • a plurality of asymmetrical membranes 30 arranged in the horizontal direction at the corners are spaced apart from each other up and down.
  • the asymmetrical membranes 30 arranged in the horizontal direction at a distance from each other at the corners are arranged such that the first extensions 31 are alternately directed in opposite directions.
  • the first extension (longer side) of one asymmetric membrane 30 is the front surface (one of the two adjacent surfaces of the liquefied gas storage tank).
  • the first extension 31 of the other asymmetric membrane 30 arranged above and below the one asymmetric membrane 30 is on the left side (adjacent of the liquefied gas storage tank). It is arranged to extend on the other of the two faces).
  • the corner membrane 60 connects two adjacent surfaces of the liquefied gas storage tank 10 with a curved surface. Each corner membrane 60 is vertically arranged between asymmetrical membranes 30 spaced apart from each other.
  • the corner membrane 60 may be formed of only a curved portion forming a curved surface, or may include a curved portion and a flat portion.
  • a line passing through the center of the corner membrane 60 in the direction in which the plurality of corner membranes 60 are arranged is called the edge of the storage tank (or simply the edge (L)).
  • the asymmetrical membrane 30 is arranged such that the edge line L passes through the connecting portion 33 (see FIG. 3 ) of the asymmetrical membrane 30 .
  • the pleated membrane 40 has wrinkles formed to absorb thermal strain generated as liquefied gas is loaded or unloaded from the liquefied gas storage tank 10 .
  • the shape and number of wrinkles are not limited to those shown in the drawings and may be variously modified.
  • the corrugated membrane 40 includes a corner membrane 60, that is, a vertical corrugated membrane arranged in a vertical direction parallel to the edge line L, and a corner membrane 60, that is, arranged in a horizontal direction perpendicular to the edge line L. It may include a horizontal direction pleated membrane. Both the vertically-directed pleated membrane and the horizontal-direction pleated membrane may have the same shape and dimensions, and may be named according to orientation when forming the sealing layer.
  • the corrugated membrane (vertical corrugated membrane) arranged at a position directly joined to the corner membrane 60 may also be referred to as the border membrane 42 .
  • the border membrane 42 may have the same shape and dimensions as the corrugated membrane 40, as shown in FIG. 6, or have the same length as the corrugated membrane 40 but have a narrower width, as shown in FIG. 4. may have As shown in FIG. 4 , when the width of the border membrane 42 is narrower than that of the pleated membrane 40 , the number of pleats may also be formed differently.
  • the flat membrane 50 has a substantially rectangular plate shape, and is formed by a plurality of (eg, four) pleated membranes 40 or a plurality (eg, three) of the wrinkled membranes 40 and one asymmetrical membrane 30. may be arranged to be surrounded by
  • the pleated membrane 40 and the flat plate membrane 50 extend only on one of two adjacent surfaces of the liquefied gas storage tank 10 . That is, the pleated membrane 40 and the flat membrane 50 are not arranged to extend across two faces simultaneously, unlike the asymmetrical membrane 30 .
  • the membrane arrangement structure of the sealing layer is centered on the edge line L make an asymmetry
  • a plurality of asymmetrical membranes 30 are arranged spaced apart from each other along an edge line L, which is a portion where the edges of two adjacent surfaces of the liquefied gas storage tank 10 are connected. do.
  • the asymmetric membrane 30 is arranged to extend in the horizontal direction.
  • the asymmetric membrane 30 is oriented and arranged such that the longer side (first extension portion 31) alternately faces the opposite side.
  • the sealing layer (eg, the primary sealing layer) is composed of a plurality of membranes bonded to each other by welding, for example, a symmetrical membrane 30A, a corner membrane 60A, and a pleated membrane. (40) and a flat membrane (50).
  • a border membrane 42A among the pleated membranes bonded to the corner membrane 60A may be referred to as a border membrane 42A, and the shape and size of the border membrane 42A are the same as those of the corrugated membrane 60A. It may or may not be different.
  • the corrugated membrane 40 and the flat membrane 50 arranged on each side of the liquefied gas storage tank form the sealing layer using the asymmetric membrane. It may be the same as the wrinkled membrane 40 and the flat membrane 50 used in the case of However, since the symmetrical membranes 30A having the same length of both extensions are arranged along the edge line L, the membrane arrangement structure arranged on both adjacent sides of the liquefied gas storage tank is symmetrical with respect to the edge line L. to be. In this case, the arrangement structure of the membrane (particularly the arrangement structure of the pleated membrane) arranged at the connection portion between the front and rear surfaces of the liquefied gas storage tank and the inclined surface becomes quite complicated.
  • asymmetrical membrane 30 in forming a sealing layer by bonding a plurality of membranes, by installing the asymmetrical membrane 30 at the corner between two adjacent surfaces of the storage tank, liquefied gas having an inclined surface In areas adjacent to the inclined surfaces on the front and rear surfaces of the storage tank, it is possible to simplify the arrangement structure of the membranes arranged to form the sealing layer (in particular, the arrangement structure of the corrugated membrane for absorbing thermal strain).
  • the asymmetric membrane of the present invention compared to the case where the asymmetric membrane is not applied to the corner of the storage tank, it is possible to suppress the diversification of the membrane shape, thereby reducing the type of membrane required for manufacturing the storage tank. It can be. Therefore, the product group of the membrane is reduced, which is advantageous in terms of construction management when manufacturing the storage tank, and the type of mold for manufacturing the membrane can be reduced, so the manufacturing cost of the membrane and the storage tank can be reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (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

La présente invention concerne une membrane pour former une couche d'étanchéité dans un réservoir de stockage (10) qui peut stocker du gaz liquéfié, et qui peut fournir une membrane asymétrique (30) comprenant une première partie d'extension (31) s'étendant dans une direction et une seconde partie d'extension (32) s'étendant dans une direction différente de celle de la première partie d'extension (31), la longueur d'extension de la première partie d'extension (31) est différente de la longueur d'extension de la seconde partie d'extension (32), et la première partie d'extension (31) et la seconde partie d'extension (32) forment une forme asymétrique.
PCT/KR2021/009470 2021-06-24 2021-07-22 Membrane asymétrique, structure d'agencement de membrane utilisant ladite membrane asymétrique et réservoir de stockage de gaz liquéfié comprenant ladite structure d'agencement de membrane WO2022270674A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2021-0082587 2021-06-24
KR1020210082587A KR20230000309A (ko) 2021-06-24 2021-06-24 비대칭형 멤브레인 및 상기 비대칭형 멤브레인을 이용한 멤브레인 배열구조, 그리고 상기 멤브레인 배열구조를 포함하는 액화가스 저장탱크

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WO2022270674A1 true WO2022270674A1 (fr) 2022-12-29

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010010152A (ko) * 1999-07-16 2001-02-05 한갑수 액화천연가스 저장탱크용 코너피스 멤브레인 유닛의 개선된 구조
KR20150141977A (ko) * 2013-04-12 2015-12-21 가즈트랑스포르 에 떼끄니가즈 유체를 저장하기 위한 씰링 및 열적으로 인슐레이팅된 탱크
US20170175952A1 (en) * 2014-07-04 2017-06-22 Daewoo Shipbuilding & Marine Engineering Co., Ltd. Liquefied natural gas storage tank and insulating wall for liquefied natural gas storage tank
WO2019086790A1 (fr) * 2017-11-06 2019-05-09 Gaztransport Et Technigaz Cuve etanche et thermiquement isolante
KR20190135459A (ko) * 2019-11-29 2019-12-06 대우조선해양 주식회사 액화가스 화물창의 단열 시스템

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20010010152A (ko) * 1999-07-16 2001-02-05 한갑수 액화천연가스 저장탱크용 코너피스 멤브레인 유닛의 개선된 구조
KR20150141977A (ko) * 2013-04-12 2015-12-21 가즈트랑스포르 에 떼끄니가즈 유체를 저장하기 위한 씰링 및 열적으로 인슐레이팅된 탱크
US20170175952A1 (en) * 2014-07-04 2017-06-22 Daewoo Shipbuilding & Marine Engineering Co., Ltd. Liquefied natural gas storage tank and insulating wall for liquefied natural gas storage tank
WO2019086790A1 (fr) * 2017-11-06 2019-05-09 Gaztransport Et Technigaz Cuve etanche et thermiquement isolante
KR20190135459A (ko) * 2019-11-29 2019-12-06 대우조선해양 주식회사 액화가스 화물창의 단열 시스템

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