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WO2021029739A1 - Système de confinement et son procédé de construction - Google Patents

Système de confinement et son procédé de construction Download PDF

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Publication number
WO2021029739A1
WO2021029739A1 PCT/KR2020/010880 KR2020010880W WO2021029739A1 WO 2021029739 A1 WO2021029739 A1 WO 2021029739A1 KR 2020010880 W KR2020010880 W KR 2020010880W WO 2021029739 A1 WO2021029739 A1 WO 2021029739A1
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WO
WIPO (PCT)
Prior art keywords
buffer layer
tank
layer
wall
foam insulation
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/KR2020/010880
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English (en)
Korean (ko)
Inventor
이상복
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Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP2022509612A priority Critical patent/JP7359488B2/ja
Publication of WO2021029739A1 publication Critical patent/WO2021029739A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • 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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/001—Thermal insulation specially adapted for cryogenic vessels
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0147—Shape complex
    • 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
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0329—Foam
    • F17C2203/0333—Polyurethane
    • 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
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0345—Fibres
    • F17C2203/035—Glass wool
    • 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
    • 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
    • F17C2203/0658—Synthetics
    • F17C2203/0663—Synthetics in form of fibers or filaments
    • 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
    • F17C2209/228—Assembling processes by screws, bolts or rivets
    • 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

Definitions

  • the present invention relates to a containment system, and more particularly, to a containment system for storing and transporting liquefied gas and a construction method thereof.
  • Cryogenic liquefied gases such as liquefied natural gas (LNG) and liquefied petroleum gas (LPG) are stored and transported by various containment systems such as tanks, ships, and pipes.
  • the containment system may be installed on a ship, barge, floating platform, or on land.
  • the containment system is largely divided into an independent type and a membrane type.
  • the standalone type consists of a tank with a sturdy structure made of aluminum, stainless steel, and steel alloy, and an insulation material attached to the outer wall of the tank.
  • the insulating material may be composed of an insulating panel, or may be composed of an insulating layer formed by a spray method.
  • Insulation panels may be made of polyurethane foam or expanded polystyrene, and are fixed to the outer wall of the tank by fasteners such as stud bolts.
  • the insulating layer may include polyurethane, and may be produced by mixing and spraying polyol and isocyanate with a spray gun on the outer wall of the tank.
  • the heat insulating layer does not need to install a fixture on the outer wall of the tank, and has excellent adhesion to the outer wall of the tank.
  • An aspect of the present invention is to provide a storage system capable of suppressing the occurrence of cracks and peeling of the insulation layer in a storage system having a spray-type insulation layer, and a construction method thereof.
  • a storage system includes a tank having an inner space for storing liquefied gas, a buffer layer fixed in a non-adhesive state to at least a part of an outer wall of the tank, and a spray method formed by covering the outer surface of the buffer layer. It includes a foam insulation layer.
  • the buffer layer is thinner and more flexible than the foamed insulating layer, and is made of a material having an elastic modulus less than that of the foamed insulating layer.
  • the buffer layer may include a heat insulating layer.
  • the heat insulating layer may include at least one selected from the group consisting of soft foamed urethane foam, soft foamed polystyrene, melamine foam, and polyethylene foam.
  • the inner and outer surfaces of the heat insulating layer may be covered with a thin metal plate, and the heat insulating layer and the thin metal plate may constitute a heat insulating part.
  • the buffer layer may include a first crack barrier covering an outer surface of the heat insulating portion.
  • the first crack barrier may include any one of a glass cloth and a glass mesh.
  • the buffer layer may be manufactured in the form of a sheet, and may be physically fixed to at least a part of the outer wall of the tank by a fastener.
  • the fixture may include a stud bolt fixed to the outer wall of the tank and passing through the buffer layer, a fixing washer fastened to the stud bolt on the buffer layer, and a fixing nut fastened to the stud bolt on the fixing washer.
  • the fixture may include a stud pin fixed to an outer wall of the tank and passing through the buffer layer, and a fixing washer fastened to the stud pin on the buffer layer.
  • the stud pin may include a vertical portion passing through the buffer layer and the fixing washer, and a horizontal portion bent from the vertical portion and in close contact with the upper surface of the fixing washer.
  • the containment system may further include a flexible protective layer covering the outer surface of the foamed insulating layer.
  • the foam insulation layer and the flexible protective layer can form a seamless single structure.
  • a second crack barrier may be located inside the foam insulation layer.
  • the second crack barrier may include at least one of a glass cloth, a glass mesh, and a metal matrix.
  • a method of constructing a containment system includes providing a tank for storing liquefied gas, fixing a buffer layer using a fixture on at least a portion of an outer wall of the tank, and spraying the outer surface of the buffer layer. And forming a foam insulation layer in a manner.
  • the buffer layer is thinner and more flexible than the foamed insulating layer, and is made of a material having an elastic modulus less than that of the foamed insulating layer.
  • the buffer layer may be manufactured in a roll form in which a long sheet is rolled and transferred to the outer wall of the tank, and may be sequentially disposed on the outer wall of the tank while the sheet is released from the roll.
  • the buffer layer disposed on the outer wall of the tank may include an overlap region in which two layers of sheets are overlapped.
  • the buffer layer may be physically fixed to at least a portion of the tank by means of a fastener, and a portion of the physically fixed buffer layer that does not overlap with the fastener may maintain a non-adhesion state with the outer wall of the tank.
  • the fixture may include stud bolts fixed to the outer wall of the tank.
  • the stud bolt may pass through the buffer layer, and the fixing washer and the fixing nut may be sequentially fastened to the stud bolt.
  • the fixture may comprise a stud pin fixed to the outer wall of the tank.
  • the stud pin When the buffer layer is disposed on the outer wall of the tank, the stud pin may penetrate the buffer layer, the fixing washer may be fastened to the stud pin, and the stud pin may be bent so that a part of the stud pin may be in close contact with the upper surface of the fixing washer.
  • the buffer layer may include a heat insulating part facing the tank and a first crack barrier covering an outer surface of the heat insulating part.
  • the heat insulating part may include a heat insulating layer including at least one selected from the group consisting of soft foamed urethane foam, soft foamed polystyrene, melamine foam, and polyethylene foam, and a metal thin plate covering the inner and outer surfaces of the heat insulating layer.
  • the first crack barrier may include any one of a glass cloth and a glass mesh.
  • a first foam insulation layer is formed on the buffer layer by a spray method
  • a second crack barrier including any one of a glass cloth and a glass mesh is disposed on the first foam insulation layer, and on the second crack barrier It may include a process of forming the second foam insulation layer by a spray method.
  • the construction method of the containment system may further include forming a flexible protective layer on the foamed insulating layer by spraying after forming the foamed insulating layer.
  • the storage system according to an embodiment of the present invention enables quick and simple construction, and low construction cost and high economical efficiency.
  • it can be applied to tanks of various shapes by minimizing mechanical fixation, can effectively suppress cracking and peeling of the foamed insulation layer, and can withstand extreme temperature changes, so the degree of freedom in operation is high.
  • FIG. 1 is a partially enlarged cross-sectional view of a storage system according to a first embodiment of the present invention.
  • FIG. 2 is an enlarged cross-sectional view of a buffer layer in the storage system shown in FIG. 1.
  • FIG 3 is a partially enlarged cross-sectional view of the containment system corresponding to the bent portion.
  • FIGS. 4 and 5 are partially enlarged cross-sectional views of a containment system according to a second embodiment of the present invention.
  • FIG. 6 is a partially enlarged cross-sectional view of a buffer layer and a fixture in the storage system according to the third embodiment of the present invention.
  • FIG. 7 is a flow chart showing a construction method of the storage system according to an embodiment of the present invention.
  • FIG. 8 and 9 are schematic diagrams of a tank shown to explain the first and second steps shown in FIG. 7.
  • 10 and 11 are enlarged cross-sectional views of a buffer layer and a fixture for explaining the second step shown in FIG. 7.
  • FIG. 12 is a schematic diagram showing the storage system after the fourth step shown in FIG. 7.
  • FIG. 1 is a partially enlarged cross-sectional view of a storage system according to a first embodiment of the present invention
  • FIG. 2 is an enlarged cross-sectional view of a buffer layer in the storage system shown in FIG. 1.
  • the storage system 100 of the first embodiment includes a tank 10 for storing liquefied gas, a buffer layer 20 fixed to the outer wall of the tank 10 in a non-adhesive state, and a buffer layer. It includes a foam insulation layer 30 covering the outer surface of (20).
  • the tank 10 may have various shapes such as a spherical type, a cylindrical type, and a prismatic type, and may be made of metal such as aluminum, stainless steel, and steel alloy.
  • the liquefied gas is stored in the sealed inner space of the tank 10.
  • the buffer layer 20 includes an insulating portion 21 facing the tank 10 and a crack barrier 22 covering the outer surface of the insulating portion 21.
  • the heat insulating part 21 may include a heat insulating layer 211 and a thin metal plate 212 covering both surfaces of the heat insulating layer 211.
  • the insulating layer 211 may include at least one of soft foamed urethane foam, soft foamed polystyrene, melamine foam, and polyethylene foam
  • the metal thin plate 212 may be an aluminum thin plate, and more preferably, fiberglass is adhered to the aluminum thin plate. It may be a thin plate (ALGC, Aluminum & Glass-Cloth).
  • the crack barrier 22 may include at least one of a glass cloth and a glass mesh.
  • the buffer layer 20 is manufactured in advance in the form of a sheet, and is physically fixed on the outer wall of the tank 10 by the fixture 40 without an adhesive means such as an adhesive.
  • the fixture 40 may be composed of a combination of a stud bolt 41 and at least one fixing washer 42 and a fixing nut 43.
  • the stud bolt 41 is fixed to the outer wall of the tank 10 by welding or the like, and penetrates the buffer layer 20.
  • the first fixing washer 421 is fastened to the stud bolt 41 on the buffer layer 20, and the second fixing washer 422 and the fixing nut 43 are sequentially placed on the first fixing washer 421 and the stud bolt 41 Is fastened to.
  • the first fixing washer 421 strongly presses the buffer layer 20 by the fastening force of the fixing nut 43 and firmly fixes the buffer layer 20 to the tank 10.
  • the first fixing washer 421 may be made of one of urethane rubber, plywood, and plastic, and may have a relatively large diameter to secure a sufficient contact area with the buffer layer 20.
  • the second fixing washer 422 may be made of metal, and has a size smaller than that of the first fixing washer 421.
  • the second fixing washer 422 is for reinforcing strength, and may be selectively used when there is a risk of damage such as cracking of the first fixing washer 421.
  • a plurality of fasteners 40 are provided on the outer wall of the tank 10 at a distance from each other.
  • one fixture 40 is illustrated in FIG. 1.
  • the buffer layer 20 is fixed in position by a physical force pressed by the fixture 40, and is firmly fixed to at least a portion of the outer wall of the tank 10 in a non-adhesive state.
  • 'non-adhesive' means that chemical bonding means is excluded.
  • the buffer layer 20 may be fixed to the entire outer wall of the tank 10 in a non-adhesive state, but only a portion of the outer wall of the tank 10 is fixed in a non-adhesive state and adhered to the rest It can also be fixed in the state. That is, in the embodiment of the present invention, not only the case where the buffer layer 20 is fixed to the entire outer wall of the tank 10 in a non-adhesive state, but also the buffer layer 20 is fixed to a part of the outer wall of the tank 10 in a non-adhesive state. Includes cases.
  • the foam insulation layer 30 is formed by a spray method, and is fixed to the outer surface of the buffer layer 20 without a separate adhesive means.
  • the foam insulation layer 30 may include polyurethane, and will be produced by mixing and spraying polyol and isocyanate with a spray gun on the outer surfaces of the fixture 40 and the buffer layer 20. I can.
  • the polyol and the isocyanate are contained in their respective containers and then pumped with a spray gun through a hose and mixed, and a mixture thereof is sprayed onto the outer surface of the buffer layer 20.
  • the sprayed mixture adheres to the outer surface of the buffer layer 20 and starts to expand. In the process of expansion, the mixture is transformed into a rigid porous structure to create a cellular foam with enhanced heat retention and permanently on the outer surface of the buffer layer 20. Is fixed.
  • the crack barrier 22 includes any one of a glass cloth and a glass mesh, and thus has a fabric structure or a mesh structure in which fine holes are formed. Accordingly, the foamed insulating layer 30 may penetrate the fine holes or gaps of the crack barrier 22 to come into contact with the metal thin plate 212 of the insulating part 21, and may be very firmly attached to the buffer layer 20. .
  • the foam insulation layer 30 may be covered with a flexible protective layer 50.
  • the flexible protective layer 50 may be composed of a semi-flexible coating layer or a semi-flexible mastic, a reinforced coating layer reinforcing the same, or a jacketing of a metal material.
  • the flexible protective layer 50 may be formed by spray-spraying and curing the coating composition on the outer surface of the foam insulation layer 30 using appropriate tools and equipment, or curing after applying the mastic composition.
  • the coating composition may be a polyurethane-based composition.
  • a metal material may be formed by jacketing the outer surface of the foamed insulating layer 30.
  • the buffer layer 20 except the tank 10, the foam insulation layer 30, and the flexible protective layer 50 constitute the cryogenic insulation structure 60.
  • the foamed insulating layer 30 occupies most of the cryogenic insulating structure 60 in terms of volume. That is, the buffer layer 20 and the flexible protective layer 50 have an extremely small thickness compared to the foamed insulating layer 30.
  • Each of the foam insulation layer 30 and the flexible protective layer 50 has a single structure that is seamless.
  • the foam insulation layer 30 and the flexible protective layer 50 which are seamless structures, smooth the surface of the containment system 100 and improve the airtightness of the containment system 100.
  • the flexible protective layer 50 increases the rigidity of the surface of the containment system 100.
  • the buffer layer 20 positioned between the tank 10 and the foam insulation layer 30 is thinner and flexible than the foam insulation layer 30, and has a smaller elastic modulus than the foam insulation layer 30.
  • elastic modulus is formed of a material.
  • a portion of the buffer layer 20 that does not overlap with the plurality of fasteners 40 referred to as a'non-fixed area' for convenience. ) Does not have a binding force on the outer wall of the tank 10.
  • the non-fixed portion of the buffer layer 20 simply covers the outer wall of the tank 10 without an adhesive, a predetermined gap exists between the outer wall of the tank 10 and the non-fixed portion, and the tank 10 ) There is no mutual binding force between the outer wall and the non-fixed part.
  • the cryogenic insulation structure 60 is located on the entire outer wall of the tank 10.
  • the outer wall of the tank 10 may include a flat portion and a bent portion.
  • 3 is a partially enlarged cross-sectional view of the containment system 100 corresponding to the bent portion.
  • the containment system 100 of FIG. 1 shows a flat portion. 1 and 3, in both the flat portion and the bent portion, a plurality of fasteners 40 are installed at a distance from each other, and a cryogenic insulation structure 60 having the same configuration is located in both the flat portion and the bent portion.
  • the inner and outer surfaces of the foam insulating layer 30 are maintained at the same temperature.
  • both the inner and outer surfaces of the foamed insulating layer 30 may maintain a temperature of 20°C. There is no temperature gradient in the foam insulation layer 30.
  • liquefied gas for example, liquefied natural gas (LNG)
  • LNG liquefied natural gas
  • the buffer layer 20 in contact with the outer wall of the tank 10 and the inner surface of the foam insulation layer 30 in contact with the buffer layer 20 are approximately -163. While cooled to °C, the outer surface of the foam insulation layer 30 is still maintained at 20 °C.
  • the foamed insulating layer 30 has a temperature gradient of approximately 183°C, and stress is generated in the buffer layer 20 and the foamed insulating layer 30 due to a difference in thermal expansion coefficient between the tank 10 and the foamed insulating layer 30.
  • the buffer layer 20 is thinner than the foam insulation layer 30, flexible, and is easily deformed by the material properties having a low elastic modulus.
  • the deformation of the buffer layer 20 acts to reduce the stress of the foamed insulating layer 30 by absorbing the strain of the foamed insulating layer 30.
  • the temperature gradient across the foam insulation layer 30 rises to approximately 208°C.
  • the stress of the foam insulation layer 30 increases and the strain increases, but the buffer layer 20 is deformed more than the above-described case (when the outside air is at 20°C) and absorbs the strain of the foam insulation layer 30 to absorb the foam insulation layer. Reduce the stress of (30).
  • the foamed insulating layer 30 is not related to the behavior of the tank 10. That is, when the tank 10 and the foam insulation layer 30 are cooled by the liquefied gas, the tank 10 and the foam insulation layer 30 have a difference in shrinkage due to the difference in the coefficient of thermal expansion, but the buffer layer 20 and the tank (10) The gap existing between the outer walls blocks the direct interaction between the tank 10 and the foam insulation layer 30.
  • the foamed insulating layer 30 is connected to the tank 10 in behavior.
  • the shrinkage rate of the foam insulation layer 30 is different from the shrinkage rate of the tank 10, but the inner surface of the foam insulation layer 30 must follow the shrinkage rate of the tank 10. do. Accordingly, as the temperature gradient increases, the stress of the foam insulation layer 30 increases, and the risk of occurrence of cracks and peeling in the foam insulation layer 30 increases.
  • the foamed insulating layer 30 due to shrinkage-expansion of the tank 10 ( 30) cracking and peeling can be effectively suppressed.
  • FIG. 4 and 5 are partially enlarged cross-sectional views of a containment system according to a second embodiment of the present invention.
  • 4 corresponds to the flat portion of the outer wall of the tank
  • FIG. 5 corresponds to the bent portion of the outer wall of the tank.
  • a second crack barrier 33 is positioned inside the foam insulation layer 30 in the containment system 200 of the second embodiment.
  • the crack barrier 22 included in the buffer layer 20 is referred to as a'first crack barrier' for convenience.
  • the foam insulation layer 30 is between the first foam insulation layer 31 and the second crack barrier 33 and the flexible protective layer 50 positioned between the first crack barrier 22 and the second crack barrier 33 It may be composed of a second insulating foam layer 32 positioned on.
  • the first foam insulation layer 31 may be formed on the first crack barrier 22 by a spray method, and a second crack barrier 33 may be positioned on the first foam insulation layer 31.
  • the second insulating foam layer 32 may be formed on the second crack barrier 33 by a spray method.
  • the second crack barrier 33 is thinner and more flexible than the foam insulation layer 30 and is formed of a material having an elastic modulus smaller than that of the foam insulation layer 30.
  • the second crack barrier 33 may include at least one of a glass cloth, a glass mesh, and a metal matrix, and may be formed of the same material as the first crack barrier 22. Therefore, when the liquefied gas is stored in the tank 10 and stress is generated in the foam insulation layer 30, the second crack barrier 33 is easily deformed by the material properties and absorbs the strain of the foam insulation layer 30 to foam. It reduces the stress of the heat insulating layer 30.
  • the second crack barrier 33 may be formed in more than one number.
  • the storage system 200 of the second embodiment including the second crack barrier 33 in addition to the buffer layer 20 may more effectively suppress the occurrence of cracks and peeling of the foamed insulating layer 30. Therefore, when the temperature gradient across the foamed insulating layer 30 is very large, the stress of the foamed insulating layer 30 can be more effectively reduced.
  • the storage system 200 of the second embodiment has the same or similar configuration as that of the first embodiment, except that the second crack barrier 33 is added, and redundant descriptions are omitted.
  • FIG. 6 is a partially enlarged cross-sectional view of a buffer layer and a fixture in the storage system according to the third embodiment of the present invention.
  • the fixture 401 may include a stud pin 45 and a fixing washer 46.
  • the stud pin 45 includes a vertical portion 451 penetrating the buffer layer 20 and the fixing washer 46, and a horizontal portion 452 bent from the vertical portion 451 and in close contact with the upper surface of the fixing washer 46.
  • the horizontal portion 452 may be bent at a right angle from the vertical portion 451, and the end of the horizontal portion 452 may have a pointed shape.
  • the stud pin 45 may have an initial rod shape, and penetrates the buffer layer 20 in this state.
  • the fixing washer 46 is fastened to the stud pin 45 on the buffer layer 20.
  • the fixing washer 46 may be formed of the same material and shape as the first fixing washer 421 of the first embodiment. After the buffer layer 20 and the fixing washer 46 are coupled to the stud pin 45, the upper portion of the stud pin 45 is bent at a right angle to become a horizontal portion 452, and the horizontal portion 452 is fixed washer 46 ) And the buffer layer 20 are strongly pressed to firmly fix the buffer layer 20 to the tank 10.
  • the horizontal portion 452 of the stud pin 45 functions as the fixing nut 43 of the first embodiment.
  • the above-described fastener 401 can reduce the number of parts by omitting the fixing nut and simplify the overall configuration.
  • the storage system of the third embodiment has the same or similar configuration to any one of the first and second embodiments described above except for the configuration of the fixture 401.
  • FIG. 7 is a flow chart showing a construction method of the storage system according to an embodiment of the present invention.
  • a method of constructing a storage system includes a first step (S10) of providing a tank for storing liquefied gas, and a second step of fixing a buffer layer to the outer wall of the tank using a plurality of fasteners. It includes a step S20 and a third step S30 of forming a foam insulation layer on the outer surface of the buffer layer by spraying. After the third step (S30), a fourth step (S40) of forming a flexible protective layer on the foamed insulating layer may be performed.
  • FIG. 8 and 9 are schematic diagrams of a tank shown to explain the first and second steps shown in FIG. 7.
  • the tank 10 in the first step (S10), may be in any one of a spherical shape, a prismatic shape, and a cylindrical shape, and may be made of aluminum, stainless steel, or steel alloy.
  • the tank 10 includes a conduit structure 11 for introducing and discharging liquefied gas.
  • the conduit structure 11 may be a structure protruding to the outside of the tank 10.
  • FIG. 8 a case in which the tank 10 has a prismatic shape is illustrated as an example, and in FIG. 9, a case in which the tank 10 is cylindrical and installed on two supports 12 is illustrated as an example.
  • the shape and support structure of the tank 10 are not limited to the illustrated example.
  • a plurality of stud bolts 41 are installed on the outer wall of the tank 10 at a distance from each other.
  • a plurality of stud pins 45 may be installed on the outer wall of the tank 10 at a distance from each other.
  • the stud bolt 41 and the stud pin 45 may be made of the same metal as the tank 10 and are attached to the outer wall of the tank 10 by welding or the like.
  • FIG. 10 and 11 are enlarged cross-sectional views of a buffer layer and a fixture for explaining the second step shown in FIG. 7.
  • the fastener 40 of the first embodiment is shown
  • the fastener 401 of the third embodiment is shown.
  • the buffer layer 20 is disposed on the entire outer wall of the tank 10 excluding the pipe structure 11, and in this process, the stud bolt 41 or the stud pin 45 is applied to the buffer layer 20. ) Through. That is, a through hole corresponding to the stud bolt 41 or the stud pin 45 is formed in the buffer layer 20, and the buffer layer 20 is temporarily fixed by the stud bolt 41 or the stud pin 45. Done.
  • the buffer layer 20 may be in the form of an elongate sheet having a certain width, and may be manufactured in a form rolled in a roll form before being installed on the outer wall of the tank 10.
  • the buffer layer 20 manufactured in the form of a roll may be sequentially disposed on the outer wall of the tank 10 while the sheet is released from the roll after being transferred from the factory to the site.
  • the buffer layer 20 unwound from the roll may partially overlap the adjacent buffer layer 20 disposed earlier. Therefore, the buffer layer 20 on the outer wall of the tank 10 may have an overlap region 21 (see FIG. 9) in which two layers of sheets are overlapped.
  • the buffer layer 20 in the form of a roll is easy to transport and store, and there is a convenience that can be disposed in a short time regardless of the shape of the tank 10.
  • the buffer layer 20 may be manufactured in a sheet form of a certain standard rather than a long sheet form.
  • the buffer layer 20 may be manufactured in the form of a rectangular sheet having a certain horizontal and vertical standard.
  • the buffer layer 20 may be disposed on the outer wall of the tank 10 by adjoining the buffer layers 20 in the form of square sheets in parallel or overlapping the edges with each other.
  • the first and second fixing washers 421 and 422 and the fixing nut 43 are sequentially fastened to the stud bolt 41 over the buffer layer 20 to firmly fix the buffer layer 20 .
  • the fixing washer 46 is fastened to the stud pin 45 on the buffer layer 20, and the fixing washer 46 is bent at a right angle on the fixing washer 46. Press to securely fix the buffer layer 20.
  • the buffer layer 20 includes a heat insulating portion 21 facing the tank 10 and a crack barrier 22 covering the outer surface of the heat insulating portion 21, and the tank 10 by a plurality of fasteners 40 and 401 ) The position is fixed on the outer wall. In a portion of the buffer layer 20 that does not overlap with the fixtures 40 and 401 (non-fixed portion), a predetermined gap exists between the outer wall of the tank 10.
  • the buffer layer 20 may be fixed to the entire outer wall of the tank 10 in a non-adhesive state through fasteners 40 and 401, but only a portion of the outer wall of the tank 10 is non-adhesive. While being fixed in a state, it may be fixed in an adhesive state to the remaining part. That is, in the embodiment of the present invention, as well as a method of fixing the buffer layer 20 to the entire outer wall of the tank 10 in a non-adhesive state through the fasteners 40 and 401, the buffer layer 20 is attached to the outer wall of the tank 10 It also includes a method of fixing it in a non-adhesive state on a part.
  • a foam insulation layer 30 is formed on the outer surface of the buffer layer 20 in a third step S30 by a spray method.
  • the foam insulation layer 30 may include polyurethane, and may be formed by mixing and spraying polyol and isocyanate with a spray gun on the outer surface of the buffer layer 20. The sprayed mixture adheres to the outer surface of the buffer layer 20 and expands, and is cured while changing into a porous structure during the expansion process to constitute the foamed insulating layer 30.
  • the foam insulation layer 30 may be formed by dividing into a first foam insulation layer 31 and a second foam insulation layer 32, and the first A second crack barrier 33 may be positioned between the foamed insulating layer 31 and the second foamed insulating layer 32.
  • the first foam insulation layer 31 may be formed on the outer surface of the buffer layer 20 by a spray method, and the second crack barrier 33 composed of any one of glass cloth and glass mesh is the first foam insulation layer 31 Can be placed on top. Subsequently, the second insulating foam layer 32 may be formed on the second crack barrier 33 by spraying.
  • the second crack barrier 33 may be manufactured in a roll shape in which a long sheet is rolled, and may be disposed on the first foam insulation layer 31 while the sheet is unwound.
  • the second crack barrier 33 is easily deformed when stress occurs in the foam insulation layer 30 and absorbs the strain rate of the foam insulation layer 30 to reduce the stress of the foam insulation layer 30.
  • a flexible protective layer 50 is formed on the foamed insulating layer 30 in a fourth step S40.
  • the flexible protective layer 50 may be formed by curing a polyurethane-based coating composition after spray spraying or curing after applying a mastic composition.
  • FIG. 12 is a schematic diagram showing the storage system after the fourth step shown in FIG. 7.
  • the cryogenic insulation structure 60 in the containment system 100 enables quick and simple construction regardless of the shape of the tank 10 and can withstand extreme temperature changes, so the degree of freedom in operation is high.
  • the foamed insulating layer 30 and the flexible protective layer 50 have a single seamless structure, the surface of the containment system 100 is smoothed, and the airtightness and rigidity of the surface of the containment system 100 are improved.
  • buffer layer 21 heat insulation
  • first foamed insulating layer 32 second foamed insulating layer

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

L'invention concerne un système de confinement et son procédé de construction. Le système de confinement comprend : un réservoir ayant un espace interne destiné à stocker du gaz liquéfié ; une couche tampon fixée dans un état non adhésif à au moins une partie de la paroi externe du réservoir ; et une couche d'isolation en mousse formée par un procédé de pulvérisation destinée à recouvrir la surface externe de la couche tampon. La couche tampon est plus mince et plus souple que la couche d'isolation en mousse, et est formée d'un matériau ayant un module élastique plus petit que celui de la couche d'isolation en mousse.
PCT/KR2020/010880 2019-08-14 2020-08-14 Système de confinement et son procédé de construction Ceased WO2021029739A1 (fr)

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JP2022509612A JP7359488B2 (ja) 2019-08-14 2020-08-14 格納システムおよびその施工方法

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KR1020190099702A KR102232225B1 (ko) 2019-08-14 2019-08-14 격납 시스템 및 이의 시공 방법
KR10-2019-0099702 2019-08-14

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KR102469998B1 (ko) * 2020-12-14 2022-11-25 현대중공업 주식회사 액화가스 저장탱크 및 이를 포함하는 선박
KR102883949B1 (ko) * 2020-12-17 2025-11-11 한화오션 주식회사 액화가스 저장탱크의 단열구조 및 상기 액화가스 저장탱크의 단열구조 형성방법
KR102365770B1 (ko) * 2021-03-22 2022-02-24 티아이지코리아 주식회사 격납 시스템 및 그 제조 방법
KR102365832B1 (ko) * 2021-06-04 2022-03-02 심상칠 액화가스 저장 탱크의 단열을 위한 단열 구조체

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US4089285A (en) * 1976-09-22 1978-05-16 Hitachi Shipbuilding & Engineering Co., Ltd. Secondary barrier construction for vessels carrying spherical low temperature liquified gas storage tanks
JP2004138247A (ja) * 2003-11-10 2004-05-13 Kawasaki Shipbuilding Corp 極低温用タンクの防熱層構造
KR100499710B1 (ko) * 2004-12-08 2005-07-05 한국가스공사 선박 내부에 설치되는 액화천연가스 저장용 탱크 구조 및 탱크 제조방법
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KR102232225B1 (ko) 2021-03-24
JP2022545194A (ja) 2022-10-26
JP7359488B2 (ja) 2023-10-11

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