WO2020130650A1 - Dispositif de fixation de paroi d'isolation pour réservoir de stockage de gaz naturel liquéfié - Google Patents

Dispositif de fixation de paroi d'isolation pour réservoir de stockage de gaz naturel liquéfié Download PDF

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Publication number
WO2020130650A1
WO2020130650A1 PCT/KR2019/018049 KR2019018049W WO2020130650A1 WO 2020130650 A1 WO2020130650 A1 WO 2020130650A1 KR 2019018049 W KR2019018049 W KR 2019018049W WO 2020130650 A1 WO2020130650 A1 WO 2020130650A1
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WIPO (PCT)
Prior art keywords
fixing device
natural gas
storage tank
insulating wall
liquefied natural
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PCT/KR2019/018049
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English (en)
Korean (ko)
Inventor
천병희
박세윤
장동혁
Original Assignee
대우조선해양 주식회사
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Priority to CN201980092466.XA priority Critical patent/CN113474248B/zh
Priority to EP19897777.9A priority patent/EP3901026A4/fr
Publication of WO2020130650A1 publication Critical patent/WO2020130650A1/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 
    • B63B2221/00—Methods and means for joining members or elements
    • B63B2221/02—Methods and means for joining members or elements by welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B2221/00—Methods and means for joining members or elements
    • B63B2221/08—Methods and means for joining members or elements by means of threaded members, e.g. screws, threaded bolts or nuts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B2221/00—Methods and means for joining members or elements
    • B63B2221/10—Methods and means for joining members or elements using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B2231/00—Material used for some parts or elements, or for particular purposes
    • B63B2231/32—Vegetable materials or material comprising predominately vegetable material
    • B63B2231/34—Wood or wood products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B2231/00—Material used for some parts or elements, or for particular purposes
    • B63B2231/40—Synthetic materials
    • B63B2231/50—Foamed synthetic materials
    • 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/052—Size large (>1000 m3)
    • 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
    • F17C2203/0354—Wood
    • 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
    • F17C2203/0358—Thermal insulations by solid means in form of panels
    • 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
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two 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
    • 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
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0631—Three or more 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
    • 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
    • F17C2203/0639—Steels
    • F17C2203/0643—Stainless steels
    • 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
    • F17C2203/0648—Alloys or compositions of metals
    • F17C2203/0651—Invar
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • 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
    • F17C2209/22—Assembling processes
    • F17C2209/227—Assembling processes by adhesive means
    • 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
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • 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 device for fixing an insulating wall of a liquefied natural gas storage tank, and more specifically, to insulate a liquefied natural gas storage tank that combines a primary insulating wall and a secondary insulating wall installed for insulating the liquefied natural gas. It relates to a wall fixture.
  • Natural gas is transported in gaseous form through on-shore or offshore gas piping, or stored in LNG carriers in the form of liquefied natural gas (hereinafter'LNG') and transported to remote consumers.
  • LNG is obtained by cooling natural gas to a very low temperature (approximately -163°C), and its volume is reduced to approximately 1/600 than that of natural gas in a gas state, so it is very suitable for long-distance transportation by sea.
  • a storage tank (commonly referred to as a'cargo') is installed in a structure for transporting or storing LNG, such as an LNG carrier for loading and unloading LNG to land-based destinations by carrying LNG.
  • LNG storage tanks can be classified into an independent tank type and a membrane type according to whether a load of a cargo directly acts on an insulating material.
  • the membrane type storage tank is divided into GTT's NO 96 type and MARK III type
  • the independent tank type storage tank is divided into MOSS type and IHI-SPB type.
  • NO 96-type storage tanks include primary and secondary sealing walls made of 0.5 to 0.7 mm thick Invar (36% nickel steel) membranes, and insulating materials such as perlite powder in a plywood box. It includes primary and secondary insulation walls provided in the form of filled insulation boxes.
  • the primary sealing wall and the secondary sealing wall have almost the same degree of liquid tightness and strength, and when the primary sealing wall leaks, the secondary sealing wall can safely support the cargo even for a considerable period of time.
  • the NO 96 type storage tank is a type of insulating wall filled with insulating material inside a wooden box, it can have higher compressive strength and stiffness than the MARK III type storage tank, and it is easy to weld and has a high automation rate.
  • the MARK III storage tank has a primary sealing wall made of a 1.2 mm thick stainless steel (SUS) membrane, a secondary sealing wall made of a triplex, and a top or bottom surface of a polyurethane foam. It includes primary and secondary insulating walls that are made of insulating panels bonded with wooden plywood.
  • SUS stainless steel
  • the primary sealing wall of the MARK III type storage tank has a corrugated corrugated portion to absorb heat contraction by LNG in a cryogenic state, and since the corrugated corrugated portion absorbs the deformation of the membrane, there is no great stress in the membrane.
  • MARK III type storage tank has disadvantages in terms of installation/manufacturing due to low welding automation rate of the primary sealing wall having corrugated corrugation, but it is cheaper than stainless steel membrane and triplex and easy to construct, compared to Invar membrane, polyurethane It is widely used because of its excellent thermal insulation effect.
  • the primary insulating wall is fixed to the upper portion of the secondary insulating wall by being coupled to a securing device (Securing device) provided on the upper portion of the secondary insulating wall.
  • FIG. 1 is a view schematically showing an insulating wall fixing device of a conventional liquefied natural gas storage tank.
  • FIG. 1(a) shows that the base socket 10 installed for coupling with the primary insulating wall is mechanically fastened by a rivet to the upper protective plate 20 of the secondary insulating wall. It is shown in Figure 1 (b), the base socket 10 is coupled by bonding (Bonding) to the upper protective plate 20 of the secondary insulation wall, the secondary insulation in Figure 1 (c) It is illustrated that the base socket 10 is coupled using a bonding after partially cutting the bottom surface of the upper protection plate 20 of the wall.
  • reference numeral 30 is a heat insulating material provided inside the secondary heat insulating wall.
  • the conventional insulating wall fixing device cuts a significant portion of the upper protective plate 20 of the secondary insulating wall to fix the base socket 10, a loss in strength of the upper protective plate 20 occurs.
  • the technical problem to be achieved by the present invention is to improve the fixing device that combines the primary and secondary insulating walls, thereby improving the strength of the bonding region between the primary and secondary insulating walls. It is to provide an insulating wall fixing device for a tank.
  • the present invention is a primary insulating wall that primarily insulates the liquefied natural gas;
  • a secondary insulating wall including a secondary insulating material and a secondary upper protective plate provided on an upper portion of the secondary insulating material, and disposed on a lower portion of the primary insulating wall to insulate the liquefied natural gas secondaryly;
  • a fixing device for coupling the primary heat insulating wall and the secondary heat insulating wall, wherein the fixing device includes a base socket in a form in which the lower circumference is stepped and a stud coupled to the base socket.
  • the base socket, the bottom portion is seated in the groove formed on the upper portion of the secondary insulating material, characterized in that the protruding end supporting the lower surface of the secondary upper protective plate, the insulating wall fixing device of the liquefied natural gas storage tank Provides
  • the base socket includes a socket body constituting the body and a socket flange protruding from the socket body stepwise, and the upper surface of the socket flange forms the same plane as the upper surface of the secondary insulating material, and the secondary upper part.
  • the protective plate is characterized in that it is arranged to span the upper surface of the secondary insulation and the socket flange.
  • the upper surface of the socket body is characterized in that it forms the same plane as the upper surface of the upper protection plate.
  • the secondary insulating material is made of polyurethane foam (PUF), and the secondary upper protective plate may be made of plywood.
  • the base socket may be bonded to the secondary insulating material.
  • An insulating wall fixing device includes: a secondary sealing wall interposed between the primary insulating wall and the secondary insulating wall; And it is formed to protrude from the body (body) of the stud further comprises a wing portion that is seated on the upper surface of the socket body, the secondary sealing wall and the area in contact with the wing portion is provided on the upper surface of the socket body It is characterized by.
  • a region where the secondary sealing wall and the wing portion are in contact may be welded.
  • the secondary of the secondary insulating wall in the fixing device for fixing the primary insulating wall and the secondary insulating wall of the liquefied natural gas storage tank, the secondary of the secondary insulating wall It includes a base socket seated in a groove formed on the upper surface of the insulating material, the base socket is provided in a stepped protruding form, the protruding step portion of the base socket supports the bottom surface of the upper protective plate of the secondary insulating wall It is characterized by.
  • the top surface of the base socket forms the same plane as the top surface of the upper protection plate, and the stepped surface of the portion protruding from the base socket forms the same plane as the top surface of the secondary insulating material, and the base socket has the primary insulating wall Characterized in that the fastening hole to which the stud to be coupled is fastened.
  • the stud includes a wing portion protruding to be coupled with a secondary sealing wall installed between the primary insulating wall and the secondary insulating wall, and the secondary sealing wall and the wing are formed on the top surface of the base socket. Welding with the part can be made.
  • the apparatus for fixing an insulating wall of a liquefied natural gas storage tank according to the present invention, as the upper surface portion of the socket flange supports the upper protective plate of the secondary insulating wall, the upper protective plate can maintain the strength and withstand the load, and an incision region of the upper protective plate Since it is minimized, it can have a higher strength than the insulating wall fixing device according to the prior art.
  • the present invention can improve productivity by reducing the on-board work time.
  • FIG. 1 is a view schematically showing an insulating wall fixing device of a conventional liquefied natural gas storage tank.
  • FIG. 2 is a view schematically showing the heat insulating structure of the liquefied natural gas storage tank according to the present invention.
  • FIG 3 is a view showing a unit of the secondary insulation panel of the liquefied natural gas storage tank according to the present invention.
  • FIG. 4 is a view showing a unit body of a primary insulating panel of a liquefied natural gas storage tank according to the present invention.
  • FIG. 5 is a view schematically showing an insulating wall fixing device of a liquefied natural gas storage tank according to the present invention.
  • the use of the terms'primary' and'secondary' is a function to primarily seal or insulate LNG based on LNG stored in a storage tank, or to function to seal or insulate secondaryly. It was used as a criterion for determining whether or not.
  • the term'upper' or'up' applied to the elements of the tank refers to the direction toward the inside of the tank, regardless of the direction to gravity
  • the term'lower' or'down' refers to gravity It refers to the direction toward the outside of the tank regardless of the direction.
  • Figure 2 is a view schematically showing the heat insulating structure of the liquefied natural gas storage tank according to the present invention
  • Figure 3 is a view showing a unit of the secondary insulation panel of the liquefied natural gas storage tank according to the present invention
  • Figure 4 Is a diagram showing a unit body of a primary insulating panel of a liquefied natural gas storage tank according to the present invention.
  • the liquefied natural gas storage tank according to the present invention, a secondary insulating wall 200 made of a plurality of secondary insulating panels 210, and a plurality of primary insulating panels 110 It can be seen that the primary insulating wall 100 made is a structure that is sequentially stacked on the inner wall of the hull.
  • a secondary sealing wall 400 is interposed between the secondary insulating wall 200 and the primary insulating wall 100, and a primary sealing wall (not shown) is interposed on the upper portion of the primary insulating wall 100.
  • a primary sealing wall (not shown) is interposed on the upper portion of the primary insulating wall 100.
  • Can For convenience of explanation, the illustration of the primary sealing wall is omitted from the drawings.
  • the primary and secondary insulation panels 110 and 210 may be made of a hexahedral unit panel having a width and length of approximately 1:3 ratio, and preferably a unit panel of approximately 1m ⁇ 3m size.
  • the present invention is not limited to this.
  • the primary insulating panel 110 may be provided as a sandwich panel in which plywood plywoods 112 and 113 are adhered to either the upper or lower or upper and lower surfaces of the insulating material 111 made of polyurethane foam (PUF). .
  • PEF polyurethane foam
  • the secondary insulating panel 210 may also be provided as a sandwich panel in which plywood plywoods 212 and 213 are adhered to the upper or lower or upper and lower surfaces of the insulating material 211 made of polyurethane foam (PUF).
  • PEF polyurethane foam
  • the primary and secondary thermal insulation panels 110 and 210 constituting the primary and secondary thermal insulation walls 100 and 200 constitute the secondary sealing wall 400 as a flat type invar membrane as described later.
  • RPUF reinforced polyurethane foam
  • the secondary insulating panel 210 may be fixed to the inner wall of the hull by an adhesive or a stud such as mastic, and the primary insulating panel 110 is secondary to the secondary insulating panel 210.
  • the sealing wall 400 may be fixed in close contact with the upper portion of the secondary sealing wall 400 by being coupled to the fixing device 300 provided on the upper portion of the secondary insulating panel 210 in the interposed state.
  • the primary sealing wall (not shown), which is in direct contact with LNG and sealed, may be provided with a stainless steel (SUS) membrane in which a number of corrugated corrugations are formed toward the inside of a storage tank to absorb shrinkage due to cryogenic temperatures.
  • SUS stainless steel
  • the primary sealing wall may be made of a plurality of unit membranes, and the plurality of unit membranes are seamlessly welded to an anchor strip provided on the upper portion of the primary insulation panel 110, The sealing of the primary sealing wall (not shown) can be made.
  • the secondary sealing wall 400 may be formed of an Invar membrane.
  • Secondary sealing wall 400 may be made of a plurality of invar strake (invar strake), such a plurality of invar strike is seamlessly welded to the tongue (tongue) member installed on top of the secondary insulation panel 210 By doing so, the sealing of the secondary sealing wall 400 can be achieved.
  • Invar Strike is a strip-shaped metal plate with a narrow width.
  • the primary and secondary insulating walls (100, 200) is a panel type (panel type) made of an insulating panel in which wood plywood is adhered to the upper and/or lower surfaces of the polyurethane foam It is provided, characterized in that the secondary sealing wall 400 is composed of a flat invar membrane (flat invar membrane).
  • the flat invar membrane Since the flat invar membrane has a small heat shrinkage coefficient, it is not suitable for a panel type insulation system in which the insulation panel is made of polyurethane foam.
  • the insulating wall supporting the membrane In order to apply a flat in-bar membrane, like the conventional NO 96-type storage tank, the insulating wall supporting the membrane should be composed of an insulating box with low heat shrinkage deformation and high rigidity.
  • the secondary insulating wall 400 is formed of an insulating panel made of polyurethane foam, while the secondary sealing wall 400 is a flat in-bar membrane. It is possible to configure.
  • the present invention installs a transverse connector (not shown) that supports both ends of the secondary sealing wall 400 at the corner of the storage tank.
  • the transverse connector is a lattice-shaped structure installed along the edges of the front and rear walls of the storage tank, and fixed at the corners of the storage tank by welding one end to an anchoring bar provided on the inner wall of the hull.
  • the other end supports the respective ends of the primary sealing wall and the secondary sealing wall 400, and serves to transfer various loads applied to them to the hull.
  • the transverse connecting body is made of a high-rigidity invar material, and between the inside of the transverse connecting body and the transverse connecting body and the hull, an insulating box having high rigidity may be interposed to support the transverse connecting body.
  • the insulating box may be provided in the form of filling the pearlite powder inside the plywood box.
  • the secondary insulating wall 200 supporting the secondary sealing wall 400 provided as a flat in-bar membrane is insulated. It is possible to form a heat-insulating panel that is less rigid than the box.
  • the present invention can form a welding line in a straight line when installing the secondary sealing wall 400 on the upper portion of the secondary insulating wall 200, thereby enabling automation of welding and thus productivity. There is an effect to be improved.
  • the primary and secondary insulating walls 100 and 200 are provided with an insulating panel made of polyurethane foam, the insulating performance is also excellent.
  • Liquefied natural gas storage tank according to the present invention compared to the conventional NO 96-type storage tank in which the insulating wall is provided in the form of an insulating box, the thickness of the primary insulating wall is approximately 40% or more, and the thickness of the secondary insulating wall It is possible to achieve the same thermal insulation effect while reducing about 20% or more.
  • the liquefied natural gas storage tank according to the present invention has a structure in which the secondary thermal insulation panel 210 and the primary thermal insulation panel 110 disposed thereon are cross-placed with each other.
  • the primary insulating panel 110 may be disposed to be shifted from each other such that the corner portion is located at the center of the secondary insulating panel 210, so that one primary insulating panel 110 is It is disposed so as to span the upper surfaces of the four secondary insulating panels 210 disposed at the bottom.
  • the fixing device 300 provided for coupling between the inner corners including the center from the top of the secondary insulation panel 210 Can be placed on.
  • the fixing device 300 as shown in Figure 3, one is arranged in the center of the heat insulating panel 210, and the rest of the fixing device so as to be spaced by the same distance in the longitudinal direction from the fixing device 300 disposed in the center ( 300) may be respectively disposed.
  • the fixing device 300 is disposed on the center line (C) in the width direction on the secondary insulation panel 210, the displacement in the width direction by the stress acting on the secondary insulation panel 210 can be minimized.
  • the slit 214 is formed at a position spaced apart by the same distance to the front and rear based on each fixing device 300, so that the fixing device 300 can be minimized to be displaced in the longitudinal direction.
  • the fixing portion S provided on the primary insulating panel 110 for coupling with the fixing device 300 may be disposed at a vertical edge portion of the side end portion including four corners of the primary insulating panel 110. .
  • the fixing part S may be spaced apart to have the same spacing along the longitudinal direction of the primary insulation panel 110.
  • the fixing part S may be provided with a semi-circular or fan-shaped groove in cross section, and press the fixing part S by fastening the nut while the stud of the fixing device 300 is inserted through the fixing part S.
  • the primary insulating panel 110 may be installed in close contact with the secondary insulating panel 210. This will be explained in more detail later.
  • three fixing devices 300 are provided on the upper portion of the secondary insulating panel 210, and eight fixing portions S are provided on the vertical edge portion of the primary insulating panel 110. As presented.
  • the fixing unit (S) formed on the four primary insulating panels 110 may be coupled to the fixing device 300 provided at the center of the secondary insulating panel 210 at one time, 2
  • the fixing unit S formed on the two primary insulating panels 110 may be coupled to the fixing device 300 provided to be spaced apart from the center in the primary insulating panel 210 at one time.
  • the primary insulation panels 110 adjacent to each other may share the fixing devices 300 disposed therebetween, and in this embodiment, three fixing devices 300 in one secondary insulation panel 210. ), it is possible to secure 8 points of the support point of the primary insulation panel 110.
  • the present invention is provided with a fixing portion (S) for coupling with the fixing device 300 in the corner portion of the primary insulating panel 110, the primary insulating panel 110 even with a small number of fixing devices 300 It is possible to secure as much as possible the support point, and thus, the stability of the support structure is improved, and the productivity of the insulation panel is improved.
  • Reference numeral 215 is an insertion groove for inserting a tongue to which an invar strike constituting the secondary sealing wall 400 is welded
  • reference numeral 115 is a tongue inserted into the insertion groove 215 and the same. It is a receiving groove for receiving the edge of the welded invar strike.
  • Reference numeral 114 is a plurality of slits (slit) formed on the primary insulating panel 110 to disperse the stress concentration due to thermal contraction
  • reference numeral 116 is an anchor strip installed for welding the primary sealing wall to be.
  • FIG. 5 is a view schematically showing an insulating wall fixing device of a liquefied natural gas storage tank according to the present invention.
  • the structure of the insulating wall fixing device 300 of the liquefied natural gas storage tank according to the present invention will be described.
  • the primary insulating wall 100 includes a primary insulating material 111 and a primary lower protective plate 113
  • the secondary insulating wall 200 includes a secondary insulating material 211 and 2 Includes a car upper protection plate 212.
  • the primary insulating material 111 and the secondary insulating material 211 may be polyurethane foam (PUF), and the primary lower protective plate 113 and the secondary upper protective plate 212 are provided with plywood plywood. Can be.
  • a hole corresponding to the socket body 311 to be described later may be formed on the secondary upper protective plate 212 of the secondary insulating wall 200, and the fixing device 300 is connected to the primary insulating wall 100.
  • a fixing part S for coupling may be formed.
  • the fixing part S provides a space for accommodating the upper configuration of the fixing device 300.
  • the insulating wall fixing device 300 of the liquefied natural gas storage tank according to the present invention, the base socket 310 provided on the upper portion of the secondary insulating wall 200; A stud 320 screwed to the base socket 310 and inserted into a fixing portion S formed at the upper end of the primary insulating wall 100; And a self-locking nut 330 coupled with the stud 320 of the region inserted into the fixing part S.
  • the base socket 310 is provided between the socket body 311 forming the body and the lower circumference of the socket body 311 between the groove formed on the second insulation 211 and the secondary upper protection plate 212. And a socket flange 312 inserted into the space to be formed.
  • Base socket 310 may be seated on the bottom portion of the groove formed on the upper portion of the secondary insulation 211, wherein the bottom portion is bonded by bonding (bonding) to the top surface of the groove.
  • the upper surface of the socket body 311 may be flush with the upper surface of the secondary upper protection plate 212, and the upper surface of the socket flange 312 may be flush with the upper surface of the secondary insulating material 211. That is, as shown in the figure, the base socket 310 may be provided in a stepped shape by the socket body 311 and the socket flange 312.
  • the socket flange 312 is inserted into a space formed between the groove formed in the secondary insulating material 211 and the secondary upper protective plate 212, so that the upper surface portion serves to support the end of the secondary upper protective plate 212. .
  • the socket flange 312 can withstand the load generated by the fixing device 300 by supporting the secondary upper protection plate 212 in the secondary upper protection plate 212, and also the secondary upper protection plate 212 Since the incision is not made in the thickness direction, the secondary upper protection plate 212 can maintain the strength and withstand the load.
  • the present invention can secure a stronger fastening strength than the conventional fastening method (see FIG. 1), and the strength by changing the size or thickness of the base socket 310, the thickness of the secondary upper protective plate 212, and the like, if necessary. There is an advantage of easy reinforcement.
  • the base socket 310 may be made of stainless steel (SUS) material.
  • the groove is formed on the upper portion of the secondary insulating material 211 to seat the base socket 310, and then the upper surface of the secondary insulating material 211 And it may be made by a method of adhering the secondary upper protective plate 212 so as to span the upper surface of the socket flange 312.
  • the insulating wall fixing device 300 according to the present invention can be worn after the base socket 310 is pre-installed on the secondary insulating wall 200, such as rivets, bonding, etc. when working on-board. No work is required and productivity can be improved.
  • the stud 320 may be a collar stud (collar stud), is formed to protrude from the body (body) of the stud 320, and the bottom portion is seated on the upper surface of the socket body 311 321 ).
  • the wing part 321 may be provided to be inclined downward as it moves away from the body of the stud 320, and may be extended such that the end is located on the upper surface of the socket body 311.
  • the secondary sealing wall 400 may be coupled to the end of the wing portion 321 by welding. That is, as shown in the drawing, the secondary sealing wall 400 may be installed between the secondary insulating wall 200 and the primary insulating wall 100 by welding to the end of the wing portion 321.
  • an area in which the secondary sealing wall 400 and the wing part 321 contact the upper surface of the socket body 311 is provided, and in the contact area, the secondary sealing wall 400 and the wing part 321 ) Is welded.
  • the welding of the secondary sealing wall 400 is made at the upper surface of the socket body 311, possible burn damage on the secondary upper protective plate 212 of the secondary insulating wall 210 is avoided. It has the advantage of being able to.
  • the fastening hole h of the stud 320 of the base socket 310 may be either through or blocked.
  • the watertightness of the gap for fastening between the base socket 310 and the stud 320 is not made, so the fastening hole h of the base socket 310 is blocked. It would be desirable to be provided.
  • the insulating wall fixing device 300 of the liquefied natural gas storage tank according to the present invention the upper portion of the stud 320 penetrates, and the flat washer supported by the primary lower protective plate 113 of the fixing portion (S) region ( 340); And a spring washer 350 disposed on the upper surface of the flat washer 340 to support the self-lock nut 330.

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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

Dispositif de fixation de paroi d'isolation pour un réservoir de stockage de gaz naturel liquéfié. La présente invention concerne un dispositif de fixation pour fixer une paroi d'isolation primaire et une paroi d'isolation secondaire d'un réservoir de stockage de gaz naturel liquéfié, le dispositif de fixation comprenant une douille de base montée dans une rainure formée sur la surface supérieure d'un isolant secondaire de la paroi d'isolation secondaire, la douille de base étant agencée de telle sorte que sa partie d'extrémité inférieure fait saillie afin d'être étagée, ce qui permet à la partie étagée faisant saillie de la douille de base de supporter la partie de surface inférieure d'une plaque de protection supérieure de la paroi d'isolation secondaire.
PCT/KR2019/018049 2018-12-20 2019-12-18 Dispositif de fixation de paroi d'isolation pour réservoir de stockage de gaz naturel liquéfié WO2020130650A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201980092466.XA CN113474248B (zh) 2018-12-20 2019-12-18 用于液化天然气储罐的隔热壁固定装置
EP19897777.9A EP3901026A4 (fr) 2018-12-20 2019-12-18 Dispositif de fixation de paroi d'isolation pour réservoir de stockage de gaz naturel liquéfié

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020180166239A KR102158648B1 (ko) 2018-12-20 2018-12-20 액화천연가스 저장탱크의 단열벽 고정장치
KR10-2018-0166239 2018-12-20

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KR102351144B1 (ko) * 2020-12-18 2022-01-12 케이씨엘엔지테크 주식회사 앵커 구조체를 포함하는 액화가스 화물창 및 이의 시공방법
CN117068325B (zh) * 2023-10-13 2024-02-09 沪东中华造船(集团)有限公司 一种薄膜型围护***绝缘模块受冷变形自适应调整方法

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Also Published As

Publication number Publication date
EP3901026A1 (fr) 2021-10-27
CN113474248A (zh) 2021-10-01
CN113474248B (zh) 2024-03-29
KR102158648B1 (ko) 2020-09-23
KR20200077660A (ko) 2020-07-01
EP3901026A4 (fr) 2022-08-31

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