CN118149264A - Sealed and thermally insulated tank - Google Patents

Sealed and thermally insulated tank Download PDF

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Publication number
CN118149264A
CN118149264A CN202311672224.2A CN202311672224A CN118149264A CN 118149264 A CN118149264 A CN 118149264A CN 202311672224 A CN202311672224 A CN 202311672224A CN 118149264 A CN118149264 A CN 118149264A
Authority
CN
China
Prior art keywords
groove
sealing plate
corrugated metal
plate
metal
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.)
Pending
Application number
CN202311672224.2A
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Chinese (zh)
Inventor
卡米耶·古尔默朗
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gaztransport et Technigaz SA
Original Assignee
Gaztransport et Technigaz SA
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Filing date
Publication date
Application filed by Gaztransport et Technigaz SA filed Critical Gaztransport et Technigaz SA
Publication of CN118149264A publication Critical patent/CN118149264A/en
Pending 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
    • 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
    • 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
    • F17C2201/0157—Polygonal
    • 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
    • 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
    • F17C2203/0604—Liners
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0352—Pipes
    • 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
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/035—Propane butane, e.g. LPG, GPL
    • 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
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/033—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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • 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
    • 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
    • F17C2260/013—Reducing manufacturing time or effort
    • 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

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

Abstract

The invention relates to a sealed and thermally insulated tank (71) for storing liquefied gas, wherein the tank wall (1) comprises a thermal insulation barrier (6) and a sealing membrane (8), wherein the thermal insulation barrier (6) comprises a first groove (13) and a second groove (14), wherein a thermal protection strip (21) is located in the first groove (13) and the second groove (14), wherein the sealing membrane (8) comprises four corrugated metal plates (16), wherein the tank wall (1) comprises a metal sealing plate (22), the lower face of which is glued at one of the groove blocks, wherein corner regions (19) of the corrugated metal plates (16) are welded on the upper face of the metal sealing plate, the upper face of which comprises a covered portion (42) and an uncovered portion (43), which is located below the corrugated metal plates (16), which uncovered portion is designed to be in contact with liquefied gas.

Description

Sealed and thermally insulated tank
Technical Field
The present invention relates to the field of sealed and insulated cans with sealing membranes and to a method for fitting such sealing membranes. In particular, the present invention relates to the field of sealed and insulated tanks for storing and/or transporting cryogenic liquefied gases, such as tanks for transporting liquefied petroleum gas (also known as LPG) having a temperature, for example, between-50 ℃ and 0 ℃, or tanks for transporting Liquefied Natural Gas (LNG) at about-162 ℃ at atmospheric pressure. These tanks may be mounted on land or on floating structures. In the case of a floating structure, the tanks may be designed for transporting liquefied gas, or for receiving liquefied gas that acts as fuel for propelling the floating structure.
Background
From document US4021982 a sealed and thermally insulated tank for storing liquefied gas is known, which tank comprises on each of its tank walls a multilayer structure consisting of a secondary thermal insulation barrier, a secondary sealing film, a primary thermal insulation barrier and a primary sealing film, which primary sealing film is designed to be in contact with the liquefied gas. The primary sealing film is a corrugated sealing film including a plurality of corrugated metal plates welded to each other.
In the extension of the tank wall, the corrugated metal sheet is welded to the anchor strips or anchor plates, which are themselves anchored to the insulation panels of the insulation barrier.
This document describes in particular the fitting of corrugated metal plates on anchor plates. In fact, in US4021982, the corrugated metal plate is welded to an anchoring system, which itself is integrally fixed to the primary insulation barrier. The anchoring system comprises a square metal plate and an anchoring boss, wherein corner parts of four adjacent corrugated metal plates are welded on the square metal plate, the square metal plate is welded on the anchoring boss, and the anchoring boss is fixed on the isolation plate in a counter bore mode through a boss retainer.
This way of fixing is advantageous for the fitting of corrugated metal sheets and, since the square metal sheets also have a sealing function, the corrugated metal sheets have a certain positioning tolerance.
However, in particular areas of the tank, in particular in the vicinity of the opening for passage of the duct, it is advantageous to limit the fastening of the sealing film on the insulating barrier, so as to allow the sealing film to be more freely displaced or deformed. In this case, however, it must be ensured that the film is sealed, in particular in the corner areas.
The fixation of the sealing membrane according to US4021982 does not allow the sealing membrane to displace or deform more sufficiently freely.
Thus, document WO2019002076 relates to a fitting method in which the metal plates have corner regions of different designs from each other and the metal plates are assembled to each other in a specific order to ensure that a seal is provided at the intersection of the metal plates.
An advantage of this type of production method is that no additional parts are required other than the corrugated metal sheet, thereby ensuring a seal at the intersection of the metal sheets. However, this approach is not entirely satisfactory despite these advantages. In particular, this method requires a large number of differently shaped metal plates and increases the risk of errors during assembly.
Disclosure of Invention
The concept on which the invention is based consists in providing a sealing film which makes it possible to limit the fixing of the sealing film on the insulating barrier, in particular areas of the tank.
Another concept on which the invention is based includes facilitating the fitting of the sealing film.
According to one embodiment, the invention provides a sealed and insulated tank for storing liquefied gas, the sealed and insulated tank being incorporated in a support structure, the tank comprising at least one tank wall, wherein the tank wall comprises a heat insulation barrier and a sealing membrane, the heat insulation barrier being directly or indirectly fixed to the support structure, the sealing membrane being supported by the heat insulation barrier and the sealing membrane being designed to be in contact with the liquefied gas,
Wherein the insulation barrier comprises insulation panels juxtaposed to each other, the insulation panels comprising a cover plate, the insulation barrier comprising a first groove and a second groove arranged in the cover plate of the insulation panels, the first groove extending in a first direction in parallel to each other and the second groove extending in a second direction in parallel to each other, the second direction being perpendicular to the first direction, the so-called first groove intersecting the so-called second groove at a groove block (nub),
Wherein the tank wall comprises a metal sealing plate comprising an upper face and a lower face, the lower face of the metal sealing plate remaining free in said groove block with respect to the insulation barrier,
First and second thermal protection strips are positioned in the first and second grooves and outside the groove blocks,
Wherein the sealing film comprises at least three corrugated metal sheets adjacent to the metal sealing plate, each corrugated metal sheet having a rectangular form and each corrugated metal sheet comprising a first edge extending in a first direction and a second edge extending in a second direction,
Wherein a first edge of the corrugated metal plate is welded in pairs by overlapping in alignment with a first thermal protection strip and a second edge of the corrugated metal plate is welded in pairs by overlapping in alignment with a second thermal protection strip,
Wherein at least two of the corrugated metal sheets comprise a corner region welded to an upper face of the metal sealing plate, the corner region connecting the first edge and the second edge, the at least two corrugated metal sheets having a first edge positioned in alignment with the first thermal protection strip and a second edge positioned in alignment with the second thermal protection strip, the upper face of the metal sealing plate comprising a covered portion and an uncovered portion complementary to the covered portion, the covered portion being located below the at least three corrugated metal sheets, the uncovered portion being designed to be in contact with liquefied gas.
According to one embodiment, the present invention provides a method for fitting a sealing membrane on a tank wall of a sealed and insulated tank for storing liquefied gas, the sealed and insulated tank being incorporated in a support structure, wherein the fitting method comprises the steps of:
-providing a tank wall comprising an insulation barrier secured to a support structure, the insulation barrier comprising insulation panels juxtaposed to each other, the insulation panels comprising a cladding panel, the insulation barrier comprising a first groove and a second groove provided in the cladding panel of the insulation panels, the first groove extending in a first direction in a manner parallel to each other, the second groove extending in a second direction in a manner parallel to each other, the second direction being perpendicular to the first direction, the so-called first groove intersecting the so-called second groove at a groove block, the first and second thermal protection strips being positioned in the first and second grooves, respectively; -cutting the first and second thermal protection strips at the groove block;
-providing a metal sealing plate comprising an upper face and a lower face;
-gluing the lower face of the metal sealing plate at said groove block on the cover plate;
-providing four corrugated metal sheets designed to form a sealing film of a tank wall, each metal sheet having a rectangular form and each metal sheet comprising a first edge and a second edge, the first edge being joined with the second edge at a corner region;
-positioning and welding four corrugated metal sheets such that each first edge is positioned in alignment with one of the first grooves and each second edge is positioned in alignment with one of the second grooves, the first edges of the corrugated metal sheets being welded in pairs by overlapping in alignment with the first thermal protection strip and the second edges of the corrugated metal sheets being welded in pairs by overlapping in alignment with the second thermal protection strip, corner regions of the corrugated metal sheets being welded on an upper face of the metal sealing plate, the upper face of the metal sealing plate comprising a covered portion and an uncovered portion complementary to the covered portion, the covered portion being located below the four corrugated metal sheets, the uncovered portion being designed to be in contact with liquefied gas.
Thanks to these features, the sealing plate may first facilitate the fitting by having a sealing action that allows a more flexible arrangement of the corrugated metal plate. In addition, the sealing plate is simple in design and, due to the simple adhesion involved, it is easy to fix the sealing plate to the insulation barrier in advance. Finally, this bonding is not designed to persist during use of the can and has only a function of pre-fixing the sealing plate, so that after welding the corrugated metal plate to the sealing plate and after separating the sealing plate, the sealing film can be freely displaced or deformed relative to the thermal barrier at the sealing plate.
According to some embodiments, this type of tank or this type of method may include one or more of the following features.
According to one embodiment, the sealing film comprises three corrugated metal sheets adjacent to the metal sealing plate, wherein two of the corrugated metal sheets comprise corner regions welded on an upper face of the metal sealing plate, the two corrugated metal sheets having a first edge positioned in alignment with the first thermal protection strip and a second edge positioned in alignment with the second thermal protection strip, and wherein a first edge of a third of the corrugated metal sheets passes through the upper face of the metal sealing plate, the covered portion being located below the three corrugated metal sheets.
According to one embodiment, the sealing film comprises four corrugated metal plates adjacent to the metal sealing plate, wherein each corrugated metal plate comprises corner regions welded on an upper face of the metal sealing plate, each corrugated metal plate having a first edge positioned in alignment with the first thermal protection strip and a second edge positioned in alignment with the second thermal protection strip, the covered portion being located below the four corrugated metal plates.
According to one embodiment, the tank wall and the support structure have a duct passing through them, the sealing membrane comprising a closing plate located around the whole circumference of the duct, the closing plate being provided with an aperture for the duct to pass through, at least one of said corrugated metal plates having an edge connected to the closing plate in a sealing manner.
According to one embodiment, the closing plate may be made in a single piece, or by assembly of a plurality of plates.
According to one embodiment, the tank wall and the support structure are locally interrupted so as to define an opening designed with a conduit passing through the opening, the heat shield being an opening heat shield adjacent to the opening.
In fact, in this region the sealing film is designed in a special way and, in comparison to the extension of the tank wall, is also designed to be welded onto the duct during the production of the tank in the same way as the corner of the tank, so that a special region is formed in which the sealing film cannot be displaced freely. The fastening of the corrugated metal sheet to the metal sealing plate thus makes it possible to limit the fastening of the sealing film to the heat insulation barrier.
According to one embodiment, the first groove and the second groove each comprise a groove base and two opposite edges spaced apart by a groove width, the first and second thermal protection strips are supported against the groove base, and the metal seal plate is positioned in the groove block and spaced apart from the edges of the first groove and the edges of the second groove.
Thus, there is a space between the groove edge and the sealing plate allowing for relative displacement of the sealing membrane with respect to the insulating barrier in the plane of the sealing membrane.
According to one embodiment, the groove width of the first groove is equal to the groove width of the second groove.
According to one embodiment, the dimension of the metal sealing plate in the first direction is smaller than or equal to the groove width of the second groove, and the dimension of the metal sealing plate in the second direction is smaller than or equal to the groove width of the first groove.
The dimensions of the metal seal plate are therefore relatively small, in fact limiting the fixing of the sealing film on the insulating barrier (THERMALLY INSULATING BARRIER).
According to one embodiment, the dimension of the metal sealing plate in the first direction is strictly smaller than the groove width of the second groove, and the dimension of the metal sealing plate in the second direction is strictly smaller than the groove width of the first groove.
According to one embodiment, the metal sealing plate has a rectangular form, two first sides of the metal sealing plate extending in a first direction and two second sides of the metal sealing plate extending in a second direction, the first sides and the second sides being joined at a corner portion, the corner portion being chamfered.
Thus, the chamfered corners and/or dimensions of the metal sealing plate are strictly smaller than the corners and/or dimensions of the chamfered groove that participate in forming a space between the groove edge and the sealing plate, to allow a relative displacement of the sealing film with respect to the thermal insulation barrier lying on the plane of the sealing film.
According to one embodiment, the corner regions of the corrugated metal sheet are chamfered.
According to one embodiment, the tank wall is a top wall, and the sealed insulated tank includes a top wall, a base wall that is opposite the top wall in a height direction, and one or more lateral walls that connect the base wall to the top wall.
According to one embodiment, the tank wall is a base wall, and the sealed insulated tank includes a base wall, a top wall that is opposite the base wall in a height direction, and one or more lateral walls that connect the base wall to the top wall.
According to one embodiment, the thermal insulation barrier is a primary thermal insulation barrier and the sealing film is a primary sealing film, the tank wall further comprising: a secondary thermal insulation barrier positioned between the primary thermal insulation barrier and the support structure; and a secondary sealing film positioned between the secondary thermal barrier and the primary thermal barrier.
According to one embodiment, before the step of gluing the metal sealing plate, the method comprises the step of arranging a template in said groove block, the template comprising a border portion at least partly surrounding a receptacle portion having a form at least partly complementary to the metal sealing plate, and wherein the step of gluing the metal sealing plate is performed by placing the metal sealing plate in the receptacle portion of the template, preferably after the step of gluing the metal sealing plate, withdrawing the template.
The template thus makes it possible to facilitate accurate positioning of the sealing plate in the groove block, which advantageously makes it possible to prevent the sealing plate from being glued too close to the edges of the groove.
According to one embodiment, before the step of arranging and welding the corrugated metal sheet, the method comprises the step of marking the metal sealing plate by means of a positioning mark configured for indicating the position of corner areas of the corrugated metal sheet to be positioned.
The presence of the metal element thus enables a marking step, in which case the presence of the metal sealing plate enables a marking step that facilitates the fitting of the sealing film, the corner areas having to be positioned at the metal sealing plate.
According to one embodiment, each metal plate comprises at least one first corrugation extending in a first direction and at least one second corrugation extending in a second direction.
According to one embodiment, the first and second thermal protection strips are made of a composite material comprising aluminum sheet and glass fiber.
The thermal protection strip thus has a material whose thermal properties make it possible to protect the cover plate from the welding heat. However, this type of material makes locating the marks difficult and inaccurate.
According to one embodiment, the corrugated metal plate and/or the metal sealing plate is made of stainless steel.
According to one embodiment, the covering panel is made of plywood or composite material.
According to one embodiment, the tank wall comprises an adhesive resin layer between the metal sealing plate and the cover plate.
According to one embodiment, the tank wall comprises an adhesive resin layer arranged between the metal sealing plate and the heat insulation barrier to glue a lower face of the metal sealing plate in said groove block on the heat insulation barrier, the adhesive resin being configured to withstand a load greater than or equal to the weight of the metal sealing plate at ambient temperature during production of the sealed heat insulation tank.
The adhesive resin is thus chosen such that these glue properties make it possible to hold the metal sealing plate in place in the most disadvantageous situation (i.e. the top wall) during the fitting of the metal sealing film. However, the adhesive resin does not have to continue to hold the metal seal plate after the metal seal film is assembled. Thus, the adhesive resin does not have sufficient gluing properties to hold the metal sealing plate in place at low temperatures during use of the sealed insulated tank.
According to one embodiment, the adhesive resin is configured to withstand a load strictly lower than the weight of the metal sealing plate at low temperature during a predetermined time.
Tanks of this type may form part of an onshore storage facility, for example for storing liquefied natural gas, or the tanks may be installed in floating, coastal or deepwater structures, in particular in the following: liquefied natural gas vessels, floating Storage and Reclassification Units (FSRU), floating production, storage and offloading units (FPSO), and the like. This type of tank can also be used as a tank in any type of vessel.
According to one embodiment, a vessel for transporting a cold liquid product includes a double hull and the above-described tanks positioned in the double hull.
According to one embodiment, the invention also provides a transfer system for a cold liquid product, the system comprising a vessel as described above, an insulated conduit arranged to connect a tank mounted in the hull of the vessel to a floating or land storage facility, and a pump for driving the cold liquid product from the floating or land storage facility through the insulated conduit to the tank of the vessel or for driving the cold liquid product from the tank of the vessel through the insulated conduit to the floating or land storage facility.
According to one embodiment, the invention also provides a method for loading or unloading such a vessel, wherein cold liquid product is transferred from a floating or land storage facility to a tank of the vessel through an insulated pipeline, or cold liquid product is transferred from a tank of the vessel to a floating or land storage facility through an insulated pipeline.
Drawings
The invention will be better understood and other objects, details, features and advantages thereof will become more apparent in the following description of a plurality of specific embodiments thereof, provided purely by way of non-limiting illustration.
Figure 1 shows a schematic view of a cross section of a tank wall.
Fig. 2 is a partial front view of a top wall of a can, according to one embodiment, prior to securing a primary sealing membrane.
Fig. 3 is a detailed illustration III of fig. 2 showing the groove block after the thermal protection strip is placed in place.
Fig. 4 is a detailed illustration III of fig. 2 showing the groove block after cutting the thermal protection strip.
Fig. 5 is a perspective detail illustration III of fig. 2, showing the groove blocks after placement of the templates.
Fig. 6 is a perspective detail view III of fig. 2 showing the groove blocks after gluing the metal sealing plate to the cover plate prior to removal of the form.
Fig. 7 is a perspective detail view III of fig. 2 showing the groove block after gluing the metal sealing plate to the cover plate after removal of the form.
Fig. 8 is a partial front view of the top wall of the can, according to one embodiment, as viewed before the primary sealing film is secured and during the marking step for positioning the corrugated metal plate.
Fig. 9 is a partial front view of the top wall of the can after securing the primary sealing membrane, according to one embodiment.
Fig. 10 is a detail illustration III of fig. 2, which shows the groove blocks after the welding step of the corrugated metal plate, which is shown in a transparent manner.
Fig. 11 is a schematic cross-sectional view of an LNG ship including tanks of a ship for loading/unloading the tanks of a quay.
Detailed Description
The sealed insulated tank 71 with a membrane capable of storing liquefied gas will be described with reference to the drawings on the lower face. The tank 71 comprises a plurality of tank walls 1, which tank walls 1 are connected to each other and fixed to the support structure 2. The tank 71 may, for example, have a polyhedral form, or may also have a cylindrical form with a circular base.
Fig. 1 schematically shows the structure of a tank wall 1.
Each can wall 1 has a multilayer structure comprising, from the outside to the inside: a secondary thermal insulation barrier 3, the secondary thermal insulation barrier 3 comprising a secondary insulation plate 4 and being supported against the support structure 2; a secondary sealing membrane 5, the secondary sealing membrane 5 being supported against the secondary thermal insulation barrier 3; a primary thermal insulation barrier 6, the primary thermal insulation barrier 6 comprising primary insulation panels 7, 12 and being supported against the secondary sealing film 5; and a primary sealing membrane 8, which primary sealing membrane 8 is supported against the primary insulation barrier 6 and is designed to be in contact with the liquefied gas contained in the tank 1. The primary sealing membrane 8 defines an inner space designed to receive liquefied gas. For example, tanks with membranes of this type are described in particular in patent applications WO2019239048, WO14057221 and FR 2691520.
Each primary insulation panel 7, 12 comprises a cover plate 10, an insulation liner 11, such as an insulation foam block, and optionally a base plate (not shown).
The liquefied gas designed to be stored in the tank 71 may be in particular Liquefied Natural Gas (LNG), i.e. a gaseous mixture comprising mainly methane and one or more other hydrocarbons. The liquefied gas may also be ethane or Liquefied Petroleum Gas (LPG), i.e. a mixture of hydrocarbons obtained from petroleum refining, the liquefied gas mainly comprising propane and butane.
Fig. 2 shows in part the top wall 1 of the tank 71. In this figure, the secondary thermal insulation barrier 3, the secondary sealing film 5 and the primary thermal insulation barrier 6 have been fitted on the support structure 2 such that only the primary thermal insulation barrier 6 can be distinguished. In this case, the top wall 1 and the support structure 2 are locally interrupted in a plurality of positions, for example defining three openings 9. The opening 9 is designed with ducts (not shown), such as filling ducts and discharge ducts, passing through the aperture. The primary thermal insulation barrier 6 comprises a plurality of primary insulation panels 7, 12 juxtaposed with respect to each other.
The primary insulation panels 7, 12 comprise an extended primary insulation panel 7 and an open primary insulation panel (opening primary insulating panels) 12, the primary insulation panel 12 being positioned adjacent to the opening 9.
The primary insulation barrier 6 comprises a first recess 13 and a second recess 14 provided in the cover plate 10 of the primary insulation board 7, 12. The first grooves 13 extend in parallel with each other in a first direction, and the second grooves 14 extend in parallel with each other in a second direction perpendicular to the first direction. The first groove 13 and the second groove 14 intersect at a groove block 15.
The primary sealing film 7 shown in more detail in fig. 9 comprises a corrugated metal plate 16 having a rectangular form. Each corrugated metal sheet 16 comprises two first edges 17 parallel to each other and extending in a first direction and two second edges 18 parallel to each other and extending in a second direction, each first edge being joined to the second edges at corner regions 19.
During fitting of the corrugated metal plate 16, the first edge 17 is positioned in alignment (in-line) with the first groove 13 and the second edge is positioned in alignment with the second groove 14. The corner regions 19 themselves are positioned in alignment with the groove blocks 15. Each corrugated metal plate comprises at least one first corrugation (not shown) extending in a first direction and at least one second corrugation (not shown) extending in a second direction. The first corrugation and the second corrugation are deliberately not shown in fig. 9 in order to more easily distinguish the assembly of the differently corrugated metal sheets to each other.
Referring again to fig. 2, the extended primary insulation panel 7 is provided with a metal anchoring strip 20, which metal anchoring strip 20 is fixed to the cladding sheet 10 inside the first recess 13 and the second recess 14, in particular, which metal anchoring strip 20 is fixed to the cladding sheet 10 at the recess block 15. On these metal anchoring strips 20, corrugated metal sheets 16 are welded and anchored to the primary insulation barrier 6.
The primary insulation board 12 with openings is itself provided with a thermal protection strip 21, which thermal protection strip 21 is positioned in the first recess 13 and the second recess 14.
In order to maintain the freedom of deformation, the primary sealing film 8 is not anchored near the opening 9 by the metal anchoring strip 20 and is thus anchored at the primary insulation plate 12 with the opening.
Thus, over the open primary insulation panel 12, the first edge 17 and the second edge 18 of the corrugated metal sheet 16 are welded by overlapping the first edge 17 and the second edge 18 of the adjacent corrugated metal sheet 16, respectively, without being anchored to the primary insulation barrier 6. The corner regions 19 themselves are welded to the upper face of the metal sealing plate 22 at the groove blocks 15. The metal seal plate 22 and its function will be described in more detail below.
Fig. 3 to 7 more particularly show the different steps by which the metal sealing plate 22 can be positioned in the groove block 15.
Fig. 3 shows an initial state in which the thermal protection strip 21 of the first groove 13 and the second groove 14 intersect at the groove block 15. Then, as shown in fig. 4, the thermal protection strip 21 is cut in alignment with the groove nubs 15 to make the groove bases of the groove blocks 15 apparent.
The template 23 is then positioned at the groove block 15, as shown in fig. 5. The template 23 comprises a border 24 partly surrounding the receptacle portion 25. The border 24 has a plurality of branches which are connected to one another and are positioned in the different grooves 13, 14 constituting the groove block 15, so as to allow the receptacle portion 25 to be centrally located on the groove block 15. The receptacle portion 25 is manufactured to have a form that is partially complementary to the metal seal plate 22 to assist in locating and centering the receptacle portion 25 on the groove block 15.
The metal sealing plate 22 is positioned in the receptacle portion 25 and glued onto the groove block 15, as shown in fig. 6. When the metal sealing plate 22 has been glued, the template is removed, as shown in fig. 7. The gluing may be performed by arranging a layer of glue on the groove block 15 or on the lower face of the metal sealing plate 22, or may also be performed by gluing a double-sided adhesive tape on the inner surface of the metal sealing plate 22.
As shown in fig. 7, the metal sealing plate 22 has a rectangular form, preferably the metal sealing plate 22 has a square form, and the metal sealing plate 22 has two first side portions 26 extending in a first direction after gluing and two second side portions 27 extending in a second direction after gluing. The first side 26 is joined to the second side 27 at a corner 28, which corner 28 is chamfered in the example shown.
The dimension of the metal sealing plate 22 in the first direction is smaller than the dimension of the second groove 14 in the first direction, and the dimension of the metal sealing plate 22 in the second direction is smaller than the dimension of the first groove 13 in the second direction. Thus, as shown in fig. 7, due to these dimensions and the form of the metal seal plate 22, and due to the centering performed by the die plate, the metal seal plate 22 is positioned to be spaced apart from the edges of the first groove 13 and the edges of the second groove 14 forming the groove block 15.
Thus, the metal seal plate 22 includes: a lower face glued to the cover plate 10; and an upper face designed to be welded to the corrugated metal plate 16.
After the gluing of the metal sealing plate, and in order to assist in the positioning of the corrugated metal plate 16, a marking step is provided, as schematically shown in fig. 8. In fact, during this step, the positioning marks 29 are precisely drawn on the metal sealing plate 22 in order to measure and indicate the position where the different corrugated metal plates are to be positioned.
Fig. 9 shows the top wall 1 after the corrugated metal sheet 16 is welded to form the primary sealing film 8, without the first and second corrugations to facilitate reading the figure.
Thus, the corrugated metal plate 16 is positioned such that the first edge 17 of the corrugated metal plate 16 is aligned with one of the first grooves 13 and the second edge 18 of the corrugated metal plate 16 is aligned with one of the second grooves 14. Since the metal sheets are placed on the primary insulation barrier 6, when referring to the primary insulation plate 12 with openings, the metal sheets are welded to each other in an overlapping manner and the metal sheets are welded to one of the metal sealing plates 21 by means of the corner regions 19 of the metal sheets. Accordingly, the first edge 17 and the second edge 18 of the corrugated metal plate 16 are welded by overlapping the first edge 16 and the second edge 17 of the adjacent corrugated metal plate 16, respectively.
Around the openings 9, a flat closing plate 30 is positioned at each opening 9. The closing plate 30 has a hole 31 of the same form as the corresponding opening 9. The closing plate 30 is designed to be welded to the corresponding conduit, for example by means of a flange. Corrugated metal sheet 16, which is located around closing plate 30, is welded to closing plate 30. The corrugations of the corrugated metal sheets 16 interrupted by the closing plate 30 are closed by corrugated caps 32 which are also welded to the closing plate 30.
According to another embodiment, not shown, the closing plate 30 may be corrugated, such that it is not necessary to provide a corrugated cap to close the corrugations.
In order to maintain a certain flexibility of the primary sealing film 8, some of the corrugations are turned (diverted) from their original direction by a turning system 33 welded to the joint between the two corrugated metal sheets 16 so as not to be interrupted by the closing plate 30. Although the corrugations are not shown, the steering system 33 and corrugated cap 32 are shown in fig. 9 so that the position of some corrugations can be inferred.
As described above, the fitting of the primary sealing film 9 is performed by the repeated sequence of arranging the corrugated metal plates 16 and welding the corrugated metal plates to the adjacent corrugated metal plates 16 and the metal sealing plate 22.
This type of sequence is shown particularly schematically by fig. 10 at the junction between the four corrugated metal sheets 16 at the metal sealing plate 22 and thus above the open insulation panel 12. In this figure, the corrugated metal plates, four, i.e. the first plate 34, the second plate 35, the third plate 36 and the fourth plate 37, are all shown in a transparent manner in order to distinguish between the metal sealing plate 22, the first groove 13, the second groove 14, the groove block 15 and the cover plate 10.
In the example shown, the first plate 34 is first positioned such that one of the first edges 17 of the first plate 34 is positioned in alignment with the first groove 13, one of the second edges 18 of the first plate 34 is positioned in alignment with the second groove 14, and one of the corner regions 19 is positioned in alignment with the groove block 15 and the metal seal plate 22. The corner region 19 is then welded to the metal seal plate 22 using a first weld bead 38.
The second plate 35 and the third plate 36 are positioned adjacent to the first plate 34 such that: the first edge 17 of the second plate 35 is welded in an overlapping manner to the first edge 17 of the first plate 34 and the second edge 18 of the third plate 36 is welded in an overlapping manner to the second edge of the first plate 34. The corner region 19 of the second plate 35 is welded partially to the metal seal plate 22 and partially to the corner region 19 of the first plate 34 by a second weld bead 39. The corner region 19 of the third plate is welded partially to the metal seal plate 22 and partially to the corner region 19 of the first plate 34 by a third weld bead 40.
Finally, the fourth plate 37 is positioned adjacent to the second plate 35 and the third plate 36 such that: the first edge 17 of the fourth plate 37 is welded in an overlapping manner to the first edge 17 of the third plate 36 and the second edge 18 of the fourth plate 37 is welded in an overlapping manner to the second edge of the second plate 35. The corner region 19 of the fourth plate 37 is welded partially to the metal sealing plate 22, partially to the corner region 19 of the second plate 35 and partially to the corner region 19 of the third plate 36 by a fourth weld bead 41.
This welding sequence is described in more detail in document US 4021982. This is an example of a welding sequence. Other sequences may be performed to obtain corrugated metal sheet 16 sealingly welded to metal seal plate 22.
Thus, the metal seal plate 22 has an upper face that includes the covered portion 42 and the uncovered portion 43 shown in fig. 10. Thus, the covered portion 42 corresponds to a portion of the upper face that is located below the four plates 34, 35, 34, 35. The uncovered portion 43 is designed to be in contact with liquefied gas.
As shown in fig. 10, the uncovered portion 43 is thus continuously surrounded by the square of the weld bead, each side of which is formed by a first weld bead 38, a second weld bead 39, a third weld bead 40, and a fourth weld bead 41, respectively. Thus, the assembly of corrugated metal sheet and uncovered portion 43 of metal seal plate 22 forms primary sealing film 8.
Referring to fig. 11, a cross-sectional view of an lng ship 70 shows a sealed and insulated tank 71 having a generally prismatic form fitted in a double hull 72 of the ship 70. The walls of the tank 71 include: a primary sealing membrane designed to be in contact with LNG contained in the tank; a secondary sealing membrane disposed between the primary sealing membrane and the double hull 72 of the vessel 70; and two thermal insulation barriers disposed between the primary and secondary sealing films and between the secondary sealing film and the double hull 72, respectively.
In a known manner, the loading/unloading piping 73 positioned on the upper deck of the vessel may be connected to a sea or port terminal by means of suitable connectors in order to transfer LNG cargo from the tank 71 or to transfer LNG cargo to the tank 71.
Fig. 11 shows an example of a marine terminal comprising a loading and unloading station 75, a submerged conduit 76 and an onshore facility 77. The loading and unloading station 75 is a fixed offshore facility that includes a movable arm 74 and a tower 78 that supports the movable arm 74. The movable arm 74 supports a bundle of insulated flexible tubes 79 that may be connected to the load/unload conduit 73. The orientable movable arm 74 is suitable for all tanker gauges. A connection duct, not shown, extends within the tower 78. The loading and unloading station 75 allows the tanker 70 to be loaded from the land facility 77 or allows the tanker 70 to be unloaded to the land facility 77. The onshore facility 77 comprises a liquefied gas storage tank 80 and a connection conduit 81 connected to the loading or unloading station 75 via an underwater conduit 76. The underwater conduit 76 allows liquefied gas to be transferred a longer distance, for example 5km, between the loading or unloading station 75 and the onshore facility 77, which enables the tanker 70 to remain a longer distance from shore during loading and unloading operations.
To generate the pressure necessary for transferring the liquefied gas, pumps on board the vessel 70 and/or provided by the land-based facility 77 and/or provided by the loading and unloading station 75 are used.
While the invention has been described in connection with a number of specific embodiments, it is evident that the invention is by no means limited thereto and that the invention encompasses all technical equivalents of the described means and combinations of the described means, as long as the combinations of the described means fall within the scope of the invention.
Use of the verb "to comprise," "include," or "comprise" and its conjugations does not exclude the presence of elements or steps other than those stated in a claim.
In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

Claims (17)

1. A sealed and insulated tank (71) for storing liquefied gas, the sealed and insulated tank (71) being incorporated in a support structure (2), the tank comprising at least one tank wall (1), wherein the tank wall (1) comprises an insulation barrier (6) and a sealing membrane (8), the insulation barrier (6) being directly or indirectly fixed on the support structure (2); the sealing membrane (8) is supported by the thermal insulation barrier (6) and the sealing membrane (8) is designed to be in contact with the liquefied gas,
Wherein the insulation barrier (6) comprises insulation panels (7, 12) juxtaposed to each other, the insulation panels comprising a cover plate (10), the insulation barrier (6) comprising a first groove (13) and a second groove (14) provided in the cover plate (10) of the insulation panel, the first groove (13) extending in a first direction in a manner parallel to each other, the second groove (14) extending in a second direction in a manner parallel to each other, the second direction being perpendicular to the first direction, the first groove (13) and the second groove (14) intersecting at a groove block (15),
Wherein the tank wall (1) comprises a metal sealing plate (22), the metal sealing plate (22) comprising an upper face and a lower face, the lower face of the metal sealing plate (22) remaining free in the groove block (15) with respect to the thermal insulation barrier (6),
A first thermal protection strip (21) and a second thermal protection strip (21) are positioned in the first groove (13) and the second groove (14) and outside the groove block (15),
Wherein the sealing film (8) comprises at least three corrugated metal sheets (16), the at least three corrugated metal sheets (16) being adjacent to the metal sealing plate (22), each corrugated metal sheet (16) having a rectangular form, and each corrugated metal sheet (16) comprising a first edge (17) extending in the first direction and a second edge (18) extending in the second direction,
Wherein the first edges of the corrugated metal sheet (16) are welded in pairs by overlapping in alignment with the first thermal protection strip, the second edges of the corrugated metal sheet (16) are welded in pairs by overlapping in alignment with the second thermal protection strip,
Wherein at least two of the corrugated metal sheets (16) comprise a corner region (19), the corner region (19) being welded on the upper face of the metal sealing plate (22), the corner region (19) connecting the first edge (17) and the second edge (18), the at least two corrugated metal sheets (16) having the first edge (17) positioned in alignment with the first thermal protection strip (21) and the second edge (18) positioned in alignment with the second thermal protection strip (21), the upper face of the metal sealing plate (22) comprising a covered portion (42) and an uncovered portion (43) complementary to the covered portion (42), the covered portion (42) being located below the at least three corrugated metal sheets (16), and the uncovered portion (43) being designed to be in contact with a gas.
2. The sealed and insulated tank (71) according to claim 1, wherein the sealing membrane (8) comprises three corrugated metal sheets (16) adjacent to the metal sealing plate (22),
Wherein two of the corrugated metal sheets (16) comprise corner regions (19), the corner regions (19) being welded on the upper face of the metal sealing plate (22), the two corrugated metal sheets (16) having the first edge (17) positioned in alignment with the first thermal protection strip (21) and the second edge (18) aligned with the second thermal protection strip (21), and wherein the first edge (71) of a third of the corrugated metal sheets passes through the upper face of the metal sealing plate (22), the covered portion (42) being located below the three corrugated metal sheets (16).
3. The sealed and thermally insulated can (71) of claim 1, wherein the sealing film (8) comprises four corrugated metal sheets (16) adjacent to the metal sealing plate (22), wherein each corrugated metal sheet (16) comprises a corner region (19), the corner region (19) being welded on the upper face of the metal sealing plate (22), each corrugated metal sheet (16) having the first edge (17) positioned in alignment with the first thermal protection bar (21) and the second edge (18) positioned in alignment with the second thermal protection bar (21), the covered portion (42) being located below the four corrugated metal sheets (16).
4. A sealed and thermally insulated tank (71) according to one of claims 1 to 3, wherein the tank wall (1) and the support structure (2) have a duct passing through the tank wall (1) and the support structure (2), the sealing membrane (8) comprising a closing plate (30) located all around the duct, the closing plate (30) being provided with an aperture (31) for the duct to pass through, at least one corrugated metal plate (16) of the corrugated metal plates (16) having an edge connected in a sealing manner to the closing plate (30).
5. The sealed and thermally insulated tank (71) of one of claims 1 to 4, wherein the first groove (13) and the second groove (14) each comprise a groove base and two opposite edges spaced apart by a groove width, the first thermal protection strip (21) and the second thermal protection strip (21) being supported against the groove base, and the metal sealing plate (22) being positioned in the groove block (15) and spaced apart from the edges of the first groove (13) and the second groove (14).
6. The sealed and insulated tank (71) according to one of claims 1 to 5, wherein the metal sealing plate (22) has a rectangular form, two first sides of the metal sealing plate (22) extending along the first direction and two second sides (27) of the metal sealing plate (22) extending along the second direction, the first sides (26) and the second sides (27) being joined at a corner, the corner being chamfered.
7. The sealed and thermally insulated tank (71) of one of claims 1 to 6, wherein the corner regions (19) of the corrugated metal sheet (16) are chamfered.
8. The sealed and insulated tank (71) according to one of claims 1 to 7, wherein the tank wall (1) is a top wall, the sealed and insulated tank (71) comprising the top wall, a base wall opposite the top wall in height direction, and one or more side walls connecting the base wall to the top wall.
9. The sealed and insulated tank (71) according to one of claims 1 to 8, wherein the insulation barrier (6) is a primary insulation barrier and the sealing film (8) is a primary sealing film, the tank wall (1) further comprising: a secondary thermal insulation barrier positioned between the primary thermal insulation barrier and the support structure (2); and a secondary sealing film positioned between the secondary thermal insulation barrier and the primary thermal insulation barrier.
10. The sealed and thermally insulated tank (71) according to one of claims 1 to 9, wherein the thermal protection strip (21) is made of a glass or rock wool strip.
11. The sealed and thermally insulated tank (71) according to one of claims 1 to 10, wherein the tank wall (1) comprises a layer of adhesive resin arranged between the metal sealing plate and the thermal insulation barrier (6) to glue the lower face of the metal sealing plate (22) in the groove block (15) on the thermal insulation barrier (6), the adhesive resin being configured to withstand a load greater than or equal to the weight of the metal sealing plate (22) at ambient temperature during production of the sealed and thermally insulated tank (71).
12. Vessel (70) for transporting a cold liquid product, the vessel comprising a double hull (72) and a sealed and insulated tank (71) according to one of claims 1 to 11, the sealed and insulated tank (71) being positioned in the double hull.
13. A transfer system for a cold liquid product, the system comprising a vessel (70) according to claim 12, an insulated conduit (73, 79, 76, 81) arranged to connect the tank (71) mounted in the hull of the vessel to a floating or land storage facility (77), and a pump for driving cold liquid product from the floating or land storage facility through the insulated conduit to the sealed and insulated tank (71) of the vessel or for driving cold liquid product from the sealed and insulated tank (71) of the vessel through the insulated conduit to the floating or land storage facility.
14. A method for fitting a sealing membrane (8) on a tank wall (1) of a sealed and thermally insulated tank (71) for storing liquefied gas, the sealed and thermally insulated tank (71) being bonded to a support structure (2), wherein the fitting method comprises the steps of:
-providing a tank wall (1), the tank wall (1) comprising an insulation barrier (6) fixed on the support structure (2), the insulation barrier (6) comprising insulation panels juxtaposed to each other, the insulation panels comprising a cover plate (10), the insulation barrier (6) comprising a first groove (13) and a second groove (14) provided on the cover plate (10) of the insulation panels, the first groove (13) extending in a first direction in a manner parallel to each other, the second groove (14) extending in a second direction in a manner parallel to each other, the second direction being perpendicular to the first direction, the first groove (13) intersecting the second groove (14) at a groove block (15), a first thermal protection strip (21) and a second thermal protection strip (21) being positioned in the first groove (13) and the second groove (14), respectively,
-Cutting the first thermal protection strip (21) and the second thermal protection strip (21) at the groove block (15);
-providing a metal sealing plate (22), the metal sealing plate (22) comprising an upper face and a lower face;
-gluing the lower face of the metal sealing plate (22) at the groove block (15) on the cover plate (10);
-providing four corrugated metal sheets (16), the four corrugated metal sheets (16) being designed to form a sealing film (8) of the tank wall (1), each metal sheet having a rectangular form and each metal sheet comprising a first edge (17) and a second edge (18), the first edge (17) being joined with the second edge (18) at a corner region (19);
-positioning and welding the four corrugated metal sheets (16) such that each first edge (17) is positioned in alignment with one of the first grooves (13) and each second edge (18) is positioned in alignment with one of the second grooves (14), the first edges of the corrugated metal sheets (16) being welded in pairs by overlapping in alignment with the first thermal protection strip, the second edges of the corrugated metal sheets (16) being welded in pairs by overlapping in alignment with the second thermal protection strip, corner regions (19) of the corrugated metal sheets (16) being welded on the upper face of the metal sealing plate (22), the upper face of the metal sealing plate (22) comprising covered portions (42) and uncovered portions (43) complementary to the covered portions (42), the covered portions (42) being positioned in contact with the four corrugated metal sheets (16) and being liquefied in contact with the uncovered portions (43).
15. Method for fitting a sealing film (8) according to claim 14, wherein, before the step of gluing the metal sealing plate (22), the method comprises a step of arranging a template (23) in the groove block (15), the template (23) comprising a border portion (24) at least partly surrounding a receptacle portion (25), the receptacle portion (25) having a form at least partly complementary to the metal sealing plate (22), and wherein the step of gluing the metal sealing plate (22) is performed by placing the metal sealing plate (22) in the receptacle portion (25) of the template (23), preferably withdrawing the template (23) after the step of gluing the metal sealing plate (22).
16. Method for fitting a sealing film (8) according to claim 14 or 15, wherein, before the step of arranging and welding the corrugated metal plate (16), the method comprises the step of marking the metal sealing plate (22) by means of a positioning mark configured for indicating the position of the corner region of the corrugated metal plate (16) to be positioned.
17. A method for loading or unloading a vessel (70), wherein cold liquid product is transported from a floating or land storage facility (77) through insulated pipelines (73, 79, 76, 81) to the sealed and insulated tank (71) of a vessel according to claim 12 or cold liquid product is transported from the sealed and insulated tank (71) of the vessel according to claim 12 through insulated pipelines (73, 79, 76, 81) to a floating or land storage facility (77).
CN202311672224.2A 2022-12-07 2023-12-07 Sealed and thermally insulated tank Pending CN118149264A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR2212928A FR3143097A1 (en) 2022-12-07 2022-12-07 Waterproof and thermally insulating tank
FRFR2212928 2022-12-07

Publications (1)

Publication Number Publication Date
CN118149264A true CN118149264A (en) 2024-06-07

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FR (1) FR3143097A1 (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021982A (en) 1974-01-24 1977-05-10 Technigaz Heat insulating wall structure for a fluid-tight tank and the method of making same
FR2691520B1 (en) 1992-05-20 1994-09-02 Technigaz Ste Nle Prefabricated structure for forming watertight and thermally insulating walls for containment of a fluid at very low temperature.
FR2996520B1 (en) 2012-10-09 2014-10-24 Gaztransp Et Technigaz SEALED AND THERMALLY INSULATING TANK COMPRISING A METALIC MEMBRANE WOUNDED ACCORDING TO ORTHOGONAL PLATES
FR3001945B1 (en) * 2013-02-14 2017-04-28 Gaztransport Et Technigaz WATERPROOF AND THERMALLY INSULATING WALL FOR FLUID STORAGE TANK
FR3002515B1 (en) * 2013-02-22 2016-10-21 Gaztransport Et Technigaz TANK WALL COMPRISING A CROSSING ELEMENT
FR3004416B1 (en) * 2013-04-12 2015-04-03 Gaztransp Et Technigaz SEALED MEMBRANE AND METHOD FOR MANUFACTURING THE SAME
KR102297860B1 (en) * 2014-09-22 2021-09-03 대우조선해양 주식회사 Insulation System of Liquified Natural Gas Cargo Containment System
KR101751838B1 (en) * 2015-08-21 2017-07-19 대우조선해양 주식회사 Insulation structure of liquefied natural gas cargo tank without anchor strip, cargo tank having the structure, and liquefied natural gas carrier
KR101931879B1 (en) 2017-06-28 2019-03-13 가즈트랑스포르 에 떼끄니가즈 Sealed membrane and method for assembling a sealed membrane
FR3082594B1 (en) 2018-06-13 2021-12-31 Gaztransport Et Technigaz WATERPROOF AND THERMALLY INSULATED TANK

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