JP2018203220A - Airtight insulation tank - Google Patents

Abstract

To provide a drainage system for evading accumulation of water or other liquid on a supporting bottom wall in a membrane type sealed heat insulation tank for an LNG carrier for transporting liquefied petroleum gas (also called LPG).SOLUTION: An airtight insulation tank includes a supporting wall defining a supporting structure body, and a tank wall attached to an inner surface of the supporting wall. Each tank wall includes a sealing membrane, and an insulation barrier provided between the sealing membrane and the supporting wall. The supporting structure body is provided with a supporting bottom wall 2. The supporting bottom wall has one or more drainage holes 11 penetrating the supporting bottom wall so as to drain water from the supporting structure body 1, and retains a projection flange 10 guiding the flow of liquid to the drainage hole. The projection flange is continuously extended substantially over the whole periphery of the supporting bottom wall with a certain distance from an edge of the supporting bottom wall along the edge of the supporting bottom wall, and is covered by the insulation barrier of the tank wall attached to the supporting bottom wall.SELECTED DRAWING: Figure 1

Description

  The present invention relates to the field of sealed insulated tanks comprising a membrane. Specifically, the present invention provides a tank that transports liquefied petroleum gas (also referred to as LPG) at a temperature of, for example, −50 ° C. to 0 ° C. or transports liquefied natural gas (LNG) at approximately −162 ° C. at atmospheric pressure. And the like in the field of hermetically insulated tanks for storage and / or transport of cryogenic fluids. These tanks can be installed on land or on floating structures. In the case of a floating structure, the tank can be intended for transport of liquefied gas or contain liquefied natural gas used as fuel for propulsion of the floating structure.

  In the technology of membrane-type hermetically insulated tanks, a support structure, for example a ship's hull, provides a support wall, the inner surface of which is covered by a multilayer structure that forms the tank's hermetically insulated wall. . The multilayer structure includes one or more sealed membranes and one or more thermal barriers interposed between the support wall and the sealed membrane (s).

  When the tank is filled with a cryogenic fluid, the heat leaking through the tank walls typically causes the inner surface of the support structure to be at a lower temperature than the ambient atmosphere. When humid ambient air can enter the interior space of the support structure, especially between the support structure and the tank wall, this low temperature can cause condensation and water runoff on the inner surface of the support structure. Is promoted.

  It is therefore recommended to provide a drainage system to avoid accumulation of water or other liquids on the supporting bottom wall.

  Patent document 1 is disclosing the membrane tank for LNG in which a support bottom wall is provided with a drain hole.

Korean Patent Application Publication No. 20150120701

  One concept on which the present invention is based is to increase the effectiveness of the drainage holes by directing liquid flowing down or flowing on the inner surface of the support structure towards the drainage holes.

  To this end, the present invention is a hermetically insulated tank for cryogenic fluid storage or transport, the tank comprising a support wall defining a support structure, and a tank wall attached to the inner surface of the support wall; Each tank wall includes a sealed membrane and a heat insulating barrier provided between the sealed membrane and the support wall, the support structure includes a support bottom wall, and the support bottom wall allows drainage of the support structure. And having one or more drain holes penetrating the support bottom wall, the support bottom wall holding a projecting flange that guides the flow of liquid to the drain hole, the projecting flange being an edge of the support bottom wall Along the edge of the bottom wall of the supporting wall, extending continuously around the entire circumference of the bottom wall, and the protruding flange is an insulating barrier on the tank wall attached to the bottom wall To provide a hermetically sealed and insulated tank.

  Due to these features, the projecting flanges hold down the liquid flowing down along the side walls of the support structure in the boundary region located between the projecting flange and the edge of the support bottom wall, and therefore drainage This liquid flow towards the hole can be encouraged.

  In advantageous embodiments, such tanks can exhibit one or more of the following features.

  In one embodiment, the protruding flange is split at the drain holes or at each drain hole to allow liquid flow to pass toward the drain holes. Liquid flowing into the boundary region of the bottom wall of the support located outside the protruding flange, for example, dewed water, and protruding due to the disconnection of the protruding flange (s) in the drain hole (s) Whether any liquid flowing in the central region of the supporting bottom wall located inside the flange is located at the drain outlet, i.e., in the central region, in the boundary region, or across the central region and the boundary region Regardless, it can reach the drainage hole.

  In an alternative embodiment, the protruding flange can be continuous and separate drain holes can be provided on either side of the protruding flange.

  In one embodiment, the protruding flange is near the edge of the support bottom wall, for example less than one tenth of the size of the support bottom wall in a direction perpendicular to the corresponding edge of the support wall. The distance is from the edge of the supporting bottom wall. In one embodiment, the distance between the protruding flange and the edge of the support bottom wall is less than 1 meter.

  Due to these features, the boundary region is much smaller than the central region of the support wall. Thus, for example, if seawater enters due to a problem with the water tightness of the support side wall of the ship, for example due to a collision or poor welding during shipbuilding, the water will quickly reach the drainage hole due to the small size of the boundary area. It is possible to easily detect the presence of water. In one embodiment, the drain hole is equipped with a water presence sensor.

  A number of materials may be suitable for manufacturing the protruding flange. In one embodiment, the protruding flange includes a bead made of polymer resin that adheres to the support bottom wall. Various polymer resins, in particular polyurethane resins and epoxy resins, can be used for this purpose. In one embodiment, the protruding flange includes a series of metal parts that are welded to the support bottom wall. These metal parts are, for example, bars or rods that are welded end-to-end or overlapped to form a continuous contour except for drainage holes (s). Can do.

  Protruding flanges can also be formed using metal parts in combination with polymer resin beads. In this case, the polymer resin beads can be used in particular to provide sealed joints between metal parts, avoiding the need to form these sealed joints by welding.

  The support structure can take on various geometric shapes, for example, a substantially spherical or prismatic shape, preferably with a flat support bottom wall. In one embodiment, the support structure comprises at least one support side wall that connects perpendicularly or diagonally to the edge of the support bottom wall on the ridge of the support structure, and the protruding flange is parallel to the ridge. Be placed. The angle between the two support walls forming the ridge can be various values, for example 90 degrees, 135 degrees or another value.

  In one embodiment, the insulation barrier of the tank wall is manufactured modularly with each support wall, in particular an insulation block juxtaposed to the support bottom wall, so as to substantially cover the inner surface of the support bottom wall. Such thermal insulation blocks can in particular include corner structures and / or flat thermal insulation blocks. Such modular construction offers the advantage of leaving a gap between the side-by-side insulation blocks. In areas where the flow of liquid needs to be promoted, these gaps can be configured as channels, for example by leaving free space or using a porous insulation material in these gaps.

  In one embodiment, the tank wall thermal barrier attached to the support bottom wall comprises a plurality of corner structures provided along a ridge of the support structure, each corner structure supporting A first wing portion that covers the boundary region of the bottom wall; and a second wing portion that is inclined with respect to the first wing portion and covers the boundary region of the support side wall. The angle of inclination between the two wings is usually equal to the angle between the two support walls forming the ridge. Due to these features, the manufacture of thermal barriers in the ridge (s) of the support structure can be performed in a simple manner using corner structures that can be prefabricated. it can.

  The protruding flange can be arranged in various ways relative to the thermal barrier. In one embodiment, the protruding flange is opposite the ridge of the support structure along the outer surface of the first wing portion of the corner structure, below the first wing portion of the corner structure. Arranged. In another embodiment, the protruding flange is located under a flat insulating block attached to the support bottom wall. Due to these features, the protruding flange, especially when made of polymer resin, guides flow, supports the thermal barrier, and serves as a positioning reference for the inner surface of the bottom wall and the thermal barrier. It can be done simultaneously to act as a shim to compensate for the difference between a theoretical flat surface.

  In another embodiment, the protruding flange is disposed between two rows of insulation blocks, for example, between the first wing portion of the corner structure and the flat insulation block.

  In one embodiment, the tank wall thermal barrier attached to the support bottom wall spans the ridge of the support structure and is supported against the first edge and the support side wall supported on the support bottom wall. And a protruding flange between the first edge of the rigid plate and the support bottom wall so that the first edge of the rigid plate is attached to the support bottom wall by gluing. It consists of a bead of polymerizable resin provided.

  In this case, a discontinuous second bead made of polymerizable resin is attached between the second edge of the rigid plate and the support side wall so that the second edge of the rigid plate is attached to the support side wall by bonding. It is preferable to arrange them.

  Advantageously, the insulating barrier of the tank wall comprises a flat insulating block attached to the supporting bottom wall and the supporting side wall so as to substantially cover the inner surface of the supporting bottom wall and the supporting side wall, and the rigid plate comprises the supporting bottom wall A row of flat thermal insulation blocks attached to the support sidewall and a row of flat thermal insulation blocks attached to the support bottom wall. , Between the rows of flat insulating blocks attached to the supporting side walls, provided on the rigid plate.

  The drain hole (s) can be arranged in various ways with respect to the protruding flange in the supporting bottom wall. In one embodiment, the drainage hole is positioned in line with the protruding flange, and the protruding flange is divided at the edge of the drainage hole.

  In one embodiment, the edge of the supporting bottom wall is located outside the protruding flange and the drainage hole is located inside the opposite side of the protruding flange.

  In this case, the heat insulation barrier of the tank wall includes a flat heat insulation block attached to the support bottom wall inside the protrusion flange, and the flat heat insulation block located between the cut-off portion of the protrusion flange and the drain hole is flat. It is preferable that a recess for defining the flow path is provided on the lower surface of the heat insulation block, and the flow path extends in a transverse direction with respect to the protruding flange.

  In an embodiment, the support bottom wall is flat and takes on a rectangular or trapezoidal shape, especially in the front tank of the ship.

  The tanks described above can be used in various types of equipment such as coastal equipment or floating structures such as LNG carriers or other ships. In one embodiment, the support structure is the hull of the ship and the drainage holes are located near the edge of the support bottom wall located towards the rear of the ship.

  The present invention also provides a ship for transporting cryogenic liquid products, wherein the ship comprises a hull and a tank as described above, and the support structure comprises the hull of the ship.

  The present invention also provides a method for loading and unloading such a ship, wherein the cryogenic liquid product is routed through an insulated pipe between the floating or coastal storage facility and the ship's tank. provide.

  The present invention is also a cryogenic liquid product transfer system, wherein the system is provided to connect the above-described ship and a tank installed in the ship's hull to a floating storage facility or a coastal storage facility. A transfer system is provided comprising a pipe and a pump that provides a flow of cryogenic liquid product through the insulated pipe between the floating or coastal storage facility and the tank of the ship.

  The invention will be better understood in the following description of some specific embodiments of the invention, by way of example only and in a non-limiting manner, with reference to the accompanying drawings, The purpose, details, features and advantages become clearer.

It is a perspective view of the prismatic support structure which can build a sealed heat insulation tank inside. It is sectional drawing along line II-II of FIG. 1 of the tank wall which concerns on 1st Embodiment. It is sectional drawing in alignment with line III-III of FIG. 1 of the tank wall which concerns on 1st Embodiment. It is a figure similar to FIG. 2 which shows the tank wall which concerns on 2nd Embodiment. It is sectional drawing along line VV of FIG. 1 of the tank wall which concerns on 2nd Embodiment. It is an expansion perspective view of the area | region VI of FIG. 1 which shows the tank wall which concerns on 3rd Embodiment. It is sectional drawing along line VII-VII of Drawing 6 of a tank wall concerning a 3rd embodiment. It is sectional drawing along line VIII-VIII of FIG. 6 of the tank wall which concerns on 3rd Embodiment. It is a perspective view of the tank wall which concerns on the modification of 3rd Embodiment which shows the flow path formed in the drain hole and the lower surface of a heat insulation housing. FIG. 2 is a schematic cutaway view of an LNG carrier and a loading / unloading terminal of the ship.

  FIG. 1 is a perspective view of a generally prismatic support structure 1 that can be formed by the hull of a liquefied gas transport ship and is designed to accommodate on its inner surface a multilayer modular cover that forms a hermetically insulated tank. It is.

  The support structure 1 comprises a metal support wall, i.e. a flat bottom wall 2 in this example, a flat ceiling wall 3 parallel to the bottom wall 2 and two flats perpendicular to the ship axis. Transverse end walls, i.e., transverse front wall 4 and transverse rear wall 5, and two opposing longitudinal lengths formed by three flat portions, i.e., lower slope portion 6, vertical portion 7 and upper slope portion 8, respectively. A directional wall. The beveled portion is inclined around the longitudinal axis of the ship, for example at an angle of 45 degrees. The support walls are joined at ridges 9 shown in FIG. 1 as continuous or broken lines depending on whether they are visible or hidden.

  The protruding flange 10 is formed on the inner surface of the bottom wall 2 which is rectangular in this case. The protruding flange 10 extends along the four edges of the bottom wall 2 at a short distance from these edges, thereby defining a boundary region 15 and thus within the boundary region 15 in the transverse direction. Water flowing down along the end wall or the longitudinal wall can be retained.

  In the illustrated example, the protruding flange 10 is divided only at the two drain holes 11 located in the vicinity of the transverse rear wall 5. In other words, the protruding flange 10 continuously extends along each of the straight portion 101 continuously extending along the front edge portion of the bottom wall 2 and the two side edges of the bottom wall 2. The front end portion extends along the rear edge portion of the bottom wall 2 and the two straight portions 102 and 103 continuously connected to the two end portions of the straight portion 101, and the two end portions are 2 And the straight line portion 104 continuously connected to the rear end portions of the two straight line portions 102 and 103. The straight line portion 104 is divided twice in this example.

  In FIG. 1, the overall shape of the protruding flange 10 is a rectangular frame. This shape can be modified in particular to have rounded portions at the corners of the bottom wall 2. The main function of the protruding flange 10 is to guide the flowing water from the boundary region 15 to the drain hole 11, thereby preventing the flowing water from moving to the central part 14 of the bottom wall 2.

  Each drain hole 11 penetrates the thickness of the bottom wall 2 and opens to a drain pipe 12 that carries the drained liquid toward a drain system (not shown). In this example, the protruding flange 10 is divided at the edges of the two drain holes 11. Therefore, each drain hole 11 can collect both the liquid from the boundary region 15 and the liquid from the central region 14 of the bottom wall 2 located on the opposite side of the protruding flange 10.

  In the case of a ship's tank, after the cargo is unloaded from the tank, the ship's ballast tank can be filled so as to incline the ship's hull with a slope to the rear. The liquid accumulated in the boundary region 15 of the bottom wall of the tank flows by gravity toward the drain hole 11 located at the rear of the tank.

  In the following, some embodiments of the protruding flange 10 and some embodiments of a multilayer modular cover forming the tank wall will be described. The combinations disclosed below are not limiting and each embodiment of the protruding flange can be used with various embodiments of a multilayer modular cover.

  A first embodiment is shown in FIGS. In this example, the protruding flange 10 is formed by an elongated metal part 20 welded to the bottom wall 2. The metal part 20 can be seen in the cross-sectional view of FIG. In FIG. 3, the metal part 20 is not cut, and the end face located at the edge of the hole 11 is visible.

  The tank wall is composed of a modular modular heat insulating block juxtaposed to the support wall. These modular heat insulation blocks include a flat heat insulation block 21 that covers a flat area, and a corner heat insulation block 22 that covers a ridge area. Each insulation block 21 or 22 incorporates an auxiliary insulation barrier member 23, an auxiliary sealing barrier member 24 and a main insulation barrier member 25, respectively. The insulation blocks 21 and 22 can be attached to the support structure in various ways, by gluing and / or by mechanical attachments such as bolts and nuts.

  The corner insulation block 22 has an angle equal to the angle between the bottom wall 2 and the adjacent side wall, that is, 135 degrees in the ridge 29 between the bottom wall 2 and the lower slope portion 6 in FIG. Then, the ridge 28 between the bottom wall 2 and the transverse rear wall 5 has two wings bent at 90 degrees.

  The protruding flange 10 is between the row of corner insulation blocks 22 covering the ridges 28, 29 and the row of flat insulation blocks 21 placed on the bottom wall 2 next to the row of corner insulation blocks 22, respectively. Placed in. Therefore, the metal part 20 provides a positioning stop for the end surface of the wing portion of the corner heat insulating block 22 placed on the bottom wall 2, and facilitates the installation of the corner heat insulating block 22. A bead 27 of a polymerizable resin, for example, an epoxy putty is arranged along the side facing the corner heat insulating block 22 of the metal part 20, and the position of the corner heat insulating block 22 is accurately adjusted with respect to the metal part 20. can do. The bead 27 of polymerizable resin can also seal the joint between these two parts, particularly if the two continuous metal parts 20 are not welded together. Finally, as can be seen in FIG. 2, the bead 27 of polymerizable resin serves as a shim that compensates for the irregularities of the support structure so that the wings of the corner insulation block 22 placed on the bottom wall 2 can be seen. It can also be arranged at least partly under the part.

  An insulating lining 31 made of, for example, glass wool or other material is placed between the two rows of insulating blocks on the protruding flange 10 to minimize the empty space in the auxiliary insulating barrier.

  A main sealing membrane 26 is arranged on the upper surface of the heat insulating blocks 21 and 22. The main sealing membrane 26 can be manufactured in various ways. Other details regarding embodiments of the sealing membrane and insulation block can be found in French Patent Application No. 2691520, US Pat. Nos. 5,586,513 and 6,035,795.

  Hereinafter, the second embodiment shown in FIGS. 4 and 5 will be described. The same reference numerals refer to elements that are similar or identical to those in FIGS. 2 and 3 and will not be described again.

  In 2nd Embodiment, the protrusion flange 10 is formed only by the bead 30 of polymeric resin.

  The bead 30 of polymerizable resin is disposed at the end of the wall away from the ridge 28 or 29 below the wing portion of the heat insulating block 22 for corners placed on the bottom wall 2. Again, the bead 30 of polymerizable resin can function as a shim to compensate for irregularities in the support structure in addition to holding down the water that flows down.

  The bead 30 of polymerizable resin can be an epoxy putty. The putty is a paste-like material made of an epoxy resin and a curing agent that hardens the putty after application. The putty is applied to the side of the insulation block that is designed to be on the opposite side of the support structure. Before the putty is cured, an insulating block is installed. The putty is crushed during this installation. A rigid shim (not shown) can be placed on the support wall to control the final thickness of the putty and to ensure the flatness of the surface of the insulation block placed on the same support wall.

  The main sealing membrane is omitted in FIGS. Other details regarding embodiments of the sealing membrane and insulation block can be found in WO 2014/167214 and WO 2017/006044.

  Hereinafter, the third embodiment will be described with reference to FIGS. The same reference numerals refer to elements that are similar or identical to the elements of FIGS. 1-5 and will not be described again.

  FIG. 6 shows ridges 28 and 29 that join at the corners of the support structure. The tank wall comprises a series of rigid plates 40, for example made of plywood, along each edge 28,29. The rigid plate 40 spans the ridge 28 or 29 of the support structure, has a first edge bonded to the bottom wall 2 by a polymeric resin bead 41, and a lower beveled portion 6 or by a polymeric resin bead 42. A second edge bonded to the transverse wall 4 or 5. The bead 41 of polymerizable resin is continuous and constitutes the protruding flange 10. The bead 42 of the polymerizable resin is discontinuous so as not to prevent water from flowing down to the bottom wall 2.

  The insulation barrier of the tank wall in this case consists of a heat insulation housing 43, for example made of wood, filled with a heat insulation material such as glass wool, perlite or other material. The heat insulating housing 43 is juxtaposed on the support wall so as to substantially cover the inner surface of the support structure. 7 and 8, each rigid plate 40 is between a row of insulating housings 43 attached to the bottom wall 2 and a row of insulating housings 43 attached to the transverse wall 4 or 5 or the longitudinal wall. Is provided. A thermal insulation lining 45, for example made of glass wool or another flexible thermal insulation material, is also provided on the rigid plate 40 between the two rows of thermal insulation housing 43.

  FIG. 9 shows a heat insulating housing 50 that can be placed at the drainage hole 11 in the bottom wall 2 when the drainage hole is away from the protruding flange. Here, the protruding flange is formed by a bead 41 of polymerizable resin under the rigid plate 40. Here, the drain hole 11 is shifted toward the central region 14 of the bottom wall 2. Other insulating housings have been omitted from this figure for clarity.

  The heat insulating housing 50 is located between the rigid plate 40 and the drain hole 11 and has a recess in the lower plate that defines the flow path 51 by a rectangular portion that penetrates the entire width of the heat insulating housing 50. The channel 51 extends in the transverse direction with respect to the bead 41 of the polymerizable resin. The bead 41 of the polymerizable resin exhibits a disconnection portion (not shown) at one end of the flow path 51 facing the rigid plate 40, and water or liquid from the boundary region 15 passes through the flow path 51 to drain holes. 11 is allowed to flow out.

  FIG. 6 also shows an anchor plate 60 welded to the bottom wall 2 and the beveled portion 6 for attaching a sealing membrane connecting ring according to known techniques.

  The rigid plate 40 and the bead 41 of the polymerizable resin under the rigid plate 40 are divided at each anchor plate 60, but the bead 41 of the polymerizable resin is connected to two surfaces of each anchor plate 60 in a sealing manner. Has been. Furthermore, at the ridge 29, it can be seen that the anchor plate 60 presents an opening 61 that forms a passage for the liquid.

  The sealing membrane is omitted in FIGS. Other details regarding embodiments of the hermetic membrane and insulation housing can be found in French Patent Publication Nos. 2867831 and 2798358.

  As can be seen in FIG. 9, one drain hole or each drain hole 11 is preferably covered by a grid 55 so as to filter out any solid waste that may be present and prevent it from entering the discharge system. .

  Referring to FIG. 10, a cutaway view of the LNG carrier 70 shows a generally prismatic sealed insulated tank 71 attached to the double hull 72 of the ship. The wall of the tank 71 has a main sealing barrier designed to contact the liquefied gas contained in the tank, and an auxiliary sealing mounted between the main sealing barrier and the ship's double hull 72. A sealing barrier and two insulating barriers mounted between the main sealing barrier and the auxiliary sealing barrier and between the auxiliary sealing barrier and the double hull 72, respectively. In a simplified variant, the ship comprises a single hull.

  In the conventional method, the loading / unloading pipe 73 located on the upper deck of the ship is connected by a suitable connector to the shipping terminal or port terminal for transferring the liquefied gas load to and from the tank 71. Can be connected.

  FIG. 10 shows an example of a shipping terminal including a loading / unloading station 75, an underwater pipeline 76, and a coastal facility 77. The loading / unloading station 75 is a fixed offshore facility including a movable arm 74 and a tower 78 that supports the movable arm 74. The movable arm 74 holds a bundle of flexible insulated pipes 79 that can be connected to the loading / unloading pipe 73. Adjustable movable arm 74 fits all LNG carrier sizes. A connecting pipe (not shown) extends inside the tower 78. The loading and unloading station 75 allows loading and unloading with the LNG carrier 70 on the coastal facility 77. This facility comprises a liquefied gas storage tank 80 and a connecting pipe 81 connected to an unloading station 75 by an underwater pipeline 76. The subsea pipeline 76 allows the transfer of liquefied gas over a long distance, for example 5 km, between the loading and unloading station 75 and the coastal facility 77, and allows the LNG carrier 70 to be moved long distance from the coast during loading and unloading operations. It is possible to keep it there.

  Pumps mounted on the ship 70 and / or pumps installed on the coastal facility 77 and / or pumps mounted on the unloading station 75 to generate the pressure required for the transfer of liquefied gas Is used.

  Use of the verb “contain”, “comprise” or “include” and its conjugations excludes the presence of other elements or steps other than those specified in the claims It is not a thing. The use of a term that does not specify a quantity for an element or step (the indefinite article “a” or “an”) does not exclude the presence of a plurality of such elements or steps, unless expressly specified otherwise.

  In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.

Claims (18)

A hermetically insulated tank for the storage or transport of cryogenic fluids,
The tank
A support wall defining a support structure (1), and a tank wall attached to the inner surface of the support wall,
Each tank wall includes a sealing membrane, and a heat insulating barrier provided between the sealing membrane and the support wall,
The support structure comprises a support bottom wall (2),
The support bottom wall (2) has a drain hole (11) penetrating the support bottom wall so as to allow drainage of the support structure,
The supporting bottom wall holds a projecting flange (10) for guiding a liquid flow to the drain hole,
The projecting flange extends along the edge of the support bottom wall (2) continuously at a distance from the edge of the support bottom wall and extends substantially entirely around the support bottom wall; The projecting flange (10) is a sealed thermal insulation tank, which is covered by the thermal insulation barrier of the tank wall attached to the support bottom wall.   The tank according to claim 1, wherein the protruding flange (10) includes a bead (41, 30, 27) made of polymer resin that adheres to the supporting bottom wall (2).   The tank according to claim 1 or 2, wherein the protruding flange (10) comprises a series of metal parts (20) welded to the support bottom wall (2). The support structure has at least one support side wall (4, 5, 6) connecting perpendicularly or diagonally to the edge of the support bottom wall (2) on the ridge (28, 29) of the support structure. Prepared,
The tank according to claim 1, wherein the protruding flange is disposed in parallel to the ridge. The thermal barrier of the tank wall attached to the support bottom wall comprises a plurality of corner structures (22) provided along the ridge of the support structure;
Each corner structure (22) is inclined with respect to the first wing part covering the boundary region of the support bottom wall (2), and the support side wall (4 The tank according to claim 4, further comprising a second wing portion that covers a boundary region of (5, 6).   The protruding flange extends under the first wing portion of the corner structure (22) and along the outer surface of the first wing portion of the corner structure. 6. A tank according to claim 5, arranged opposite the ridge (28, 29). The heat insulation barrier of the tank wall further comprises a plurality of flat heat insulation blocks (21) attached to the support bottom wall so as to substantially cover the inner surface of the support bottom wall (2).
The tank according to claim 5, wherein the protruding flange (10) is arranged between the first wing portion of the corner structure (22) and the flat heat insulating block (21). The heat insulation barrier of the tank wall attached to the support bottom wall is supported by being in contact with the first edge and the support side wall supported on the support bottom wall across the ridge of the support structure. Comprising a rigid plate (40) having a second edge;
The protruding flange is provided between the first edge of the rigid plate and the support bottom wall (2) so that the first edge of the rigid plate is attached to the support bottom wall by adhesion. The tank according to claim 4, comprising a bead of polymerizable resin (41). The insulation barrier of the tank wall is a flat surface attached to the support bottom wall (2) and the support side walls (4, 5, 6) so as to substantially cover the inner surface of the support bottom wall and the support side wall. Insulating block (43)
The rigid plate (40) is provided between the row of flat heat insulation blocks attached to the support bottom wall and the row of flat heat insulation blocks attached to the support side wall,
A flexible insulating material (45) is disposed between the row of the flat insulating blocks attached to the support bottom wall and the row of the flat insulating blocks attached to the supporting side wall. The tank according to claim 8, which is provided in   The tank according to any one of the preceding claims, wherein the protruding flange is divided at the drain hole (11) and allows the flow of liquid to pass towards the drain hole. . The edge of the support bottom wall (2) is located outside the protruding flange (10), and the drainage hole (11) is located inside the opposite side of the protruding flange (10),
The insulation barrier of the tank wall comprises a flat insulation block (43) attached to the support bottom wall inside the protruding flange;
The flat heat insulation block (50) positioned between the cut-off portion of the protruding flange (10) and the drain hole (11) defines a flow path (51) on the lower surface of the flat heat insulation block (50). Having a recess,
The tank according to claim 10, wherein the flow path extends in a transverse direction with respect to the protruding flange. The drain hole (11) is positioned in line with the protruding flange (10),
The tank according to claim 10, wherein the protruding flange is divided at an edge of the drain hole.   The support structure is a hull of a ship (70), and the drainage hole is located near the edge of the support bottom wall (2) located towards the rear (5) of the ship. Item 13. The tank according to any one of Items 1 to 12. The protruding flange (10) is at a distance from the edge of the supporting bottom wall (2);
The tank according to claim 1, wherein the distance is smaller than one tenth of a dimension of the support bottom wall in a direction perpendicular to the edge of the support bottom wall.   The tank according to claim 1, wherein the drain hole is equipped with a water detection sensor.   A ship (70) for transporting a cryogenic liquid product comprising a hull (72) and a tank according to any one of claims 1 to 15, wherein the support structure comprises the ship The hull (72). A method for loading and unloading a ship (70) according to claim 16, comprising:
A method wherein the cryogenic liquid product is routed between a floating or coastal storage facility (77) and the tank (71) of the ship through insulated pipes (73, 79, 76, 81). A cryogenic liquid product transfer system comprising:
The system
A ship (70) according to claim 16,
Insulated pipes (73, 79, 76, 81) provided to connect the tank (71) installed in the hull of the ship to a floating body storage facility or a coastal storage facility (77);
A pump for providing a flow of cryogenic liquid product through the insulated pipe between the floating body storage facility or the coastal storage facility and the tank of the ship.

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