KR20230093168A - Facility for storing a liquefied gas comprising a tank and a dome structure - Google Patents

Abstract

The present invention relates to a support structure (1), a closed and insulated tank disposed on the support structure (1), and a dome structure (19) passing through an opening (18) formed in the ceiling wall (11) and the upper support wall (3) of the tank. As for a liquefied gas storage facility comprising a, the dome structure 19 extends in the thickness direction and is fixed to the upper support wall 3 and hermetically welded to the sealing membrane 17 of the ceiling wall 11 (22). ), wherein the barrel 22 includes a lower end 33 facing the inner space of the tank and a closing plate 25 disposed toward the lower end 33 of the barrel 22 to cover the barrel, The storage facility includes at least one pipe 20 , 21 , 31 passing through the holes 27 , 28 , 29 formed in the closure plate 25 and the dome structure 19 to transport liquefied gas.

Description

Facility for storing a liquefied gas comprising a tank and a dome structure}

The present invention relates to liquefaction such as tanks, for example for the transport of liquefied petroleum gas (LPG) having a temperature between -50°C and 0°C or for the transport of liquefied natural gas (LNG) at about -162°C at atmospheric pressure. It relates to the field of storage facilities for liquefied gases comprising hermetically insulated tanks for the storage and/or transport of gases.

These facilities can be installed on land or on floating structures. In the case of a floating structure, the tank of the facility is to transport the liquefied gas or to accommodate the liquefied gas that is the fuel for the propulsion of the floating structure.

More specifically, the present invention relates to a liquefied gas storage facility comprising a dome structure passing through an opening formed in a ceiling wall of a tank.

WO2019215414 discloses a liquefied gas storage facility comprising a support structure formed by a double hull of a carrier ship and a sealed and insulated tank accommodated inside the support structure. The wall of the tank has a multi-layer structure, sequentially from outside to inside, including a secondary thermal insulation barrier, a secondary sealing membrane, a primary thermal insulation barrier, and a primary sealing membrane intended to come into contact with the liquefied gas stored in the tank. The upper wall of the tank includes an upwardly protruding cuboid-shaped space known as a liquid dome near the rear wall of the support structure. The tank includes three hollow columns passing through the lid of the liquid dome and defining loading or unloading lines for loading or unloading fluids to or from the tank, and an emergency well for lowering of emergency pumps. and a loading/unloading tower including an unloading line in case of malfunction of another unloading pump. These liquid domes are not entirely satisfactory. In particular, the inside of the liquid dome is susceptible to dynamic pressure due to sloshing, that is, the movement of the cargo inside the tank. Furthermore, thermal insulation is ensured by an insulating block fixed inside the liquid dome, while sealing of the liquid dome is ensured by a sealing membrane fixed to the thermal insulation barrier and hermetically connected to the primary sealing membrane on the top of the tank. Accordingly, the structure of such a liquid dome is relatively complex to manufacture.

The idea forming the basis of the present invention is to propose a hermetically insulated tank comprising a dome structure which is protected against movement of the liquefied gas inside the tank.

Another idea forming the basis of the present invention is to propose a hermetically insulated tank with a dome structure which has a simple structure to manufacture.

According to one embodiment, the present invention provides a liquefied gas storage facility comprising a support structure and a closed insulated tank disposed on the support structure, wherein the closed insulated tank has an inner space, and the support structure comprises an upper support wall. wherein the tank includes a ceiling wall fixed to an upper supporting wall, the ceiling wall being supported by at least one insulating barrier in a thickness direction from the outside to the inside of the tank and housed in the tank At least one sealing membrane adapted to contact liquefied gas, the storage facility comprising a dome structure passing through an opening formed in a ceiling wall and an upper support wall, the dome structure comprising a barrel extending in the thickness direction, , the barrel comprises a lower end directed towards the interior space of the tank and at least one closure plate positioned towards the lower end of the barrel to cover the barrel, the closure plate having at least one hole The storage facility includes at least one pipe adapted to transport liquefied gas, and the pipe passes through the dome structure and through a hole formed in the closure plate.

Thus, the closure plate makes it possible to protect the dome structure against movement of the liquefied gas inside the tank.

According to another advantageous embodiment, such a closed insulated tank may have one or more of the following features.

According to one embodiment, the barrel has a cylindrical shape with a circular section.

According to one embodiment, the barrel is secured to the upper support wall.

According to one embodiment, the barrel is hermetically welded to the sealing membrane of the ceiling wall.

According to one embodiment, the dome structure comprises a ceiling fixed to the upper end of the barrel, for example by welding.

According to one embodiment, the ceiling is a dome structure so that the dome structure can withstand a greater pressure inside the tank.

According to one embodiment, the closure plate is fixed to the barrel and the pipe is mounted so as to translate freely in the thickness direction inside the hole. That is, the closure plate is not fixed to the pipe but to the barrel, but is movable relative to the closure plate, particularly when the pipe undergoes thermal contraction during cooling or loading of the tank.

According to one embodiment, the closure plate is secured to the barrel by means of a plurality of fixing elements.

According to one embodiment, the fastening element is a gusset which is respectively fastened on the one hand to the inner surface of the barrel and on the other hand to the upper surface of the closure plate.

According to one embodiment, the reinforcement plate is welded to the inner surface of the barrel and to the upper surface of the closure plate.

According to another embodiment, the closure plate is fixed to the pipe by at least two reinforcing plates.

According to one embodiment, each reinforcing plate comprises a corner welded to the pipe and an edge welded to a closure plate, for example to an upper surface of the closure plate.

According to one embodiment, the reinforcing plates are oriented radially with respect to the axis of the pipe and are regularly distributed around the axis of the pipe.

According to one embodiment, the pipe to which the closure plate is fixed is centered relative to the barrel of the dome structure.

According to one embodiment, the installation comprises two closure plates held together by at least two metal sheets forming a spacer maintaining a gap between the two closure plates.

According to one embodiment, the metal sheets also serve as stiffeners.

According to one embodiment, the dome structure includes an insulating packing that fills the interior of the barrel and rests on the closure plate. Therefore, insulation of the dome structure is efficient and installation is easy.

According to one embodiment, a mesh is interposed between the insulating packing and the closure plate. The mesh thus makes it possible to maintain an insulating packing in the barrel.

According to one embodiment, the insulating packing is selected from insulating foams such as glass wool, rock wool and polyurethane foam.

According to one embodiment, the insulating packing includes one or more foam blocks. According to another embodiment, the insulating packing includes spray foam.

According to another embodiment, the dome structure includes an insulating packing covering the outer surface of the barrel projecting beyond the upper support wall of the support structure.

According to one embodiment, the insulating packing also covers the outer surface of the dome structured ceiling.

According to one embodiment, the pipe is fixed to the closure plate and connected to a spray bar comprising one or more spray nozzles. This allows simpler installation of the spray bar when the spray bar is secured to the top wall of the tank as in the prior art.

According to one embodiment, the spray bar has an annular shape.

According to one embodiment, the spray nozzles are distributed around the central axis of the annular shape of the spray bar.

According to one embodiment, the closure plate is disposed in the inner space of the closed insulated tank. Thus, the closing plate is located at the lower end of the barrel.

According to one embodiment, the closing plate is disposed in the inner space of the closed insulated tank at a distance from the lower end of the barrel. This particularly facilitates the fixing of the closure plate to the barrel.

According to one embodiment, the closing plate extends in a plane located at a vertical distance from the plane of the lower end of the barrel of less than 50 cm, advantageously more than 5 cm, preferably between 10 and 25 cm. Thus, such a distance facilitates securing the closure plate to the barrel while positioning the closure plate above the maximum loading limit of the tank.

According to one embodiment, when projecting out of the plane of the lower end of the barrel, the closure plate covers at least 80%, preferably more than 95%, of the cross section of the lower end of the barrel.

According to one embodiment, the closure plate includes a plurality of holes and the liquefied gas storage facility includes a plurality of pipes for conveying the liquefied gas, each pipe passing through the dome structure and passing through one of the holes formed in the closure plate. pass

According to one embodiment, the at least one pipe is for unloading the liquefied gas stored in the tank, the pipe extending near the bottom wall of the tank and equipped with an unloading pump.

According to one embodiment, at least one of the pipes is for loading liquefied gas stored in the tank.

An installation according to one of the above embodiments is for example an onshore storage facility for storing LNG, or a floating structure, offshore or deep sea, in particular an LNG or ethane carrier, a floating storage and regasification unit (FSRU), a remote floating It can be installed in a Floating Production and Storage Unit (FPSO). In the case of a floating structure, the installation's tank may be intended to receive liquefied natural gas, which is the fuel for the propulsion of the floating structure.

According to one embodiment, a carrier for transporting fluid includes a hull, such as a double hull, and facilities for storing liquefied gas as described above, the hull of the carrier forming a supporting structure.

According to one embodiment, the present invention also provides a method for loading or unloading a carrier vessel in which fluid is conveyed via an insulated pipeline to a floating or land storage facility, or to a tank of the carrier vessel.

According to one embodiment, the present invention also provides a fluid transfer system comprising a carrier vessel as described above, an insulated pipeline arranged to connect a tank installed on the hull of the carrier vessel to a floating or land storage facility, and Includes pumps for pumping fluid flow from floating or land storage facilities or into tanks through insulated pipelines.

The invention will be better understood, and other objects, details, features and advantages thereof will appear more clearly from the following description of a number of specific embodiments of the invention, given by way of non-limiting example only, with reference to the accompanying drawings. will be.
1 is a schematic perspective view of a support structure for supporting a closed and insulated tank for storing liquefied gas, and the dome structure is not shown.
2 is a schematic diagram of a multilayer structure of a tank wall.
3 is a schematic diagram of a cross-section of a dome structure of a sealed and insulated tank.
Figure 4 is a perspective view not showing the spraying device of the lower end of the dome structure of Figure 3;
5 is a perspective view from above of a lower end of the dome structure of FIG. 3;
6 is a view of the dome structure of FIG. 3 viewed from below.
7 is a cross-sectional view of a dome structure of a sealed and insulated tank according to another embodiment.
Figure 8 is a detailed view of the closure plate and pipe of Figure 7;
9 is a cross-sectional view of a dome structure of a sealed and insulated tank according to another embodiment.
10 schematically shows a carrier ship composed of a tank for storing liquefied natural gas and a terminal for loading/unloading the tank by partially cutting it.

Referring to FIG. 1 , it shows a support structure 1 to which a closed and insulated tank for storing liquefied gas is intended to be fixed. The support structure 1 is formed by, for example, the double hull of a carrier ship. The support structure 1 generally has a polyhedral shape. It has two supporting walls, front and rear (2), in this case octagonal in shape, and only the rear supporting wall (2) is shown in FIG. The front and rear walls 2 are, for example, the cofferdam walls of the carrier, which extend transversely to the longitudinal direction of the carrier. The support structure 1 also includes an upper support wall 3 , a lower support wall 4 and side support walls 5 , 6 , 7 , 8 , 9 , 10 .

A sealed and insulated tank for storing liquefied gas is fixed respectively to one of the supporting walls 2, 3, 5, 6, 7, 8, 9, 10 of the supporting structure 1 and thus an internal space for accommodating the liquefied gas. It includes a plurality of tank walls to define.

As shown in FIG. 2, each wall of the tank has a secondary thermal insulation barrier 12 comprising a thermal insulation element 13 fixed to the support structure 1 continuously from the outside to the inside in the thickness direction of the wall, the above 2 A secondary sealing membrane 14 fixed to the thermal insulation element 13 of the primary thermal insulation barrier 12, a thermal insulation element 16 fixed to the thermal insulation element 13 of the secondary thermal insulation barrier 12 or the support structure 1 ) And a primary thermal insulation barrier 15 secured to the secondary sealing membrane 14, and a primary thermal insulation barrier 15 secured to the thermal insulation element 16 of the primary thermal insulation barrier 15 and brought into contact with the liquefied gas contained in the tank. It includes a sealing membrane (17). As an example, such a membrane tank is described in patent applications WO14057221, FR2691520 and FR2877638, respectively, relating in particular to the Mark V®, Mark III® and NO96® products developed by the applicant.

The liquefied gas to be stored in the tank is in particular liquefied natural gas (LNG), i.e. a gas mixture mainly comprising methane and one or more other hydrocarbons, ethane or liquefied petroleum gas (LPG), i.e. produced in a petroleum refinery comprising propane and butane. It may be a mixture of hydrocarbons.

As shown in FIG. 3 , the upper support wall 3 and ceiling wall 11 of the tank are locally interrupted to demarcate the opening 18 . The tank protrudes upward from the upper support wall 3 around the opening 18 and has a passage 24 through which pipes 20, 21, 31 respectively pass for loading, unloading or cooling the liquefied gas in the tank. It includes a dome structure 19 defining a.

The dome structure 19 includes a barrel 22 extending in the thickness direction of the ceiling wall 11 . The barrel 22 has a cylindrical shape with a circular cross section. The dome structure 19 further includes a ceiling 23 welded to the upper end of the barrel 22 . The ceiling 23 is preferably domed with a downward facing recess, which allows the dome structure 19 to withstand greater pressure inside the tank. The lower end 33 of the barrel 22 is oriented towards the inner space of the tank and hermetically welded to the primary sealing membrane 17 . The barrel 22 and ceiling 23 are made of stainless steel, for example. The barrel 22 is fixed to the upper support wall 3 by means of an annular fastener 32 , for example.

The dome structure 19 also includes a closing plate 25 fixed to the barrel 22 . The closing plate 25 is fixed to the lower end of the barrel 22 by a plurality of reinforcing plates 26 as shown in FIGS. 4 and 5 . The reinforcing plates 26 are regularly distributed around the closure plate 25 . Said reinforcement plate 26 is welded to the inner surface of the barrel 22 on the one hand and to the upper surface of the closure plate 25 on the other hand. In this case, the reinforcing plate 26 includes two wings perpendicular to each other, one of which is fixed to the barrel 22 and the other to the closing plate 25 .

The closure plate 25 is arranged to at least partially cover the lower end 33 of the barrel 22 . In the illustrated embodiment, the closure plate 25 is offset slightly downward relative to the lower end 33 of the barrel 22 . By way of example, the vertical distance between the plane of the closure plate 25 and the plane of the lower end 33 of the barrel 22 is less than 50 cm and greater than 5 cm, preferably between 10 and 25 cm. This gap between the closure plate 25 and the lower end 33 of the barrel 22 facilitates in particular the welding of the reinforcement plate 26 to the closure plate 25 .

Preferably, when projecting along an axis perpendicular to the plane of the lower end 33 of the barrel 22, the closure plate 25 and its holes 27, 28 and 29 cover at least 80% of the cross section of the barrel 22. , advantageously at least 90%, preferably 100%. The closing plate 25 includes a plurality of holes 27 , 28 and 29 through which the pipes 20 , 21 and 31 pass. The closing plate 25 is preferably made of stainless steel.

Further, in the illustrated embodiment, to ensure thermal insulation of the dome structure 19, the thermal insulation packing 30 is accommodated in the barrel 22 in such a way as to fill the space inside the barrel 22. According to one embodiment, the insulating packing 30 is selected from insulating foams such as glass wool, rock wool and polyurethane foam. If the insulating packing contains insulating foam, it may consist of one or more insulating blocks or may be obtained by spraying an expanded foam solution inside the barrel 22 .

The insulating packing 30 is seated on the closing plate 25 . Preferably, the mesh 34 shown in FIG. 3 is interposed between the closure plate 25 and the insulating packing 30 in such a way as to hold the insulating packing 30 inside the barrel 22 . Thus, the closure plate 25 ensures that the insulating packing 30 is supported inside the barrel 22 .

According to another embodiment, not shown, in addition to or as an alternative to the thermal insulation packing 30 housed in the barrel 22, the barrel 22 and the ceiling 23 of the dome structure 19 are provided with an upper supporting wall ( 3) is covered with insulating packing on the protruding outer surface, providing thermal continuity to the thermal insulation of the ceiling wall 11 of the tank.

The closure plate 25 also constitutes a shield to protect the dome structure 19, more specifically the barrel 22 and the insulating packing 30, from sloshing of liquefied gas that could potentially damage it.

In addition, the sealing plate 25 allows the spray device 35 shown in Figs. 3 and 6 to spray liquefied gas into the inner space of the tank to be installed near the ceiling wall 11 of the tank. This atomizing device makes it possible in particular to cool the tank before loading the liquefied gas into the tank. The purpose of this cooling is to lower the temperature inside the tank, in particular to prevent excessive vaporization of the liquefied gas during loading and to limit the intensity of thermal stresses of certain elements housed inside the tank, thus avoiding situations detrimental to the safety and/or integrity of the tank. will be. The spray device 35 includes a pipe 31 continuously passing through the ceiling 23 of the barrel 22 or the dome structure 19 and an insulating packing 30 accommodated in the barrel 22 . The pipe 31 also passes through a hole 29 formed in the closure plate 25 . The pipe 31 is connected to a spray bar 36 shown in FIG. 6 which is fixed against the lower surface of the sealing plate 25.

The spray bar 36 includes a plurality of spray nozzles 37 . The spray nozzles 37 are oriented in such a way as to ensure distribution of the sprayed gas in the interior space of the tank. According to the alternative embodiment shown, the spray bar 36 is annular, with spray nozzles 37 regularly distributed around the central axis of the annular shape. The spray bar 36 may be secured to the inner surface of the closure plate 25 by any suitable means such as, for example, a retaining collar or retaining clip.

The pipe 20 is for loading the liquefied gas into the tank. It has an elbow portion extending through the barrel 22 and by a vertical portion passing through the closure plate 25 . The lower end of the pipe 20 is thus opened to the inner space of the tank. Pipe 20 is also connected outside the tank to a loading pipeline comprising a manifold intended to be connected to a sea or port terminal or bunker vessel.

Pipe 21 is for unloading liquefied gas from the tank. In the illustrated embodiment, the pipe 21 passes through the ceiling 23 of the dome structure 19 and then through the closing plate 25 . The pipe 21 extends substantially over the entire height of the tank up to near the bottom wall of the tank. In addition, an unloading pump (not shown) is mounted on the pipe 21.

The dome structure 19 may also have a temperature gauge and a level sensor including a plurality of temperature sensors vertically distributed in the interior space of the tank. The level sensor and the temperature sensor are mounted, for example, along a vertical post that passes through one of the openings in the closing plate 25 and extends along one of the pipes 20, 21, 31 respectively and is fixed to the latter.

7 and 8 show a dome structure according to another embodiment. This embodiment is different from the one described above with reference to FIGS. 3 to 6 , in particular, the facility includes a pipe 38 for discharging gas in a gaseous state, and the dome structure 19 is a second closing plate 39 Including, the closing plate 25 and the second closing plate 39 are directly fixed to the pipe 38 without being fixed to the barrel 22 of the dome structure 19. This pipe 38 allows vaporous gas to be discharged from the inner space of the tank and transported to, for example, a carrier ship, reliquefaction unit or burner's propulsion system.

As shown in FIG. 8 , the closing plate 25 has an opening through which the pipe 38 passes. Further, the closure plate 25 is fixed to the pipe 38 by means of a reinforcing plate 40 having a corner welded to the pipe 38 and a corner welded to the top surface of the closure plate 25 . In the illustrated embodiment, the closure plate 25 is secured to an attached lower portion of the pipe 38 which is secured to the remainder of the pipe 38 by, for example, a bolted flange.

In addition, the second closure plate 39 is disposed parallel below the closure plate 25, and the metal sheet 41 is disposed between the closure plate 25 and the second closure plate 39 and welded to these plates. . Accordingly, the metal sheet 41 serves as a spacer maintaining a distance between the two closure plates 25 and 39 and a reinforcing material reinforcing the rigidity of the closure plates 25 and 39 . In the illustrated embodiment, the pipe 38 does not pass through the second closure plate 39 but the second closure plate permits gaseous phase stored in the internal space of the tank to reach the pipe 38 in a gas phase manner. It has an opening for the passage of gas.

9 shows a dome structure according to another embodiment. In this embodiment, the barrel 22 and the ceiling 23 of the dome structure 19 are covered with insulation packing 42 on the outer surface protruding from the upper support wall 3, thereby insulating the ceiling wall 11 of the tank. provides thermal continuity to the In addition, the dome structure 19 passes through an opening formed in the gas supply pipe 43 and the closing plate 25, which is open inside the barrel 22, and opens in the inner space of the tank, for example near its lower wall. and a pipe 44 having a lower end that is For example, the pipes 43 and 44 may be used during operation for start-up or maintenance of the tank, in particular for heating, inerting or airing the tank. Therefore, for example, when the tank is inactivated, the inert gas is injected into the inner space of the tank through the gas supply pipe 43. Thus, the inert gas pushes the gas constituting the initial atmosphere of the tank to the bottom of the tank like a piston and is sucked in by the pipe 44. In this embodiment in which gas is injected into the dome structure 19, it is more advantageous to place an insulating packing 42 outside rather than inside the barrel 22 to limit head loss.

Referring to Fig. 10, a partially cut-away view of a liquefied gas carrier 70 shows a generally prismatic closed insulated tank 71 mounted on the double hull 72 of the carrier. The walls of the tank 71 include a primary sealing membrane brought into contact with the LNG contained in the tank, a secondary sealing membrane disposed between the primary sealing membrane and the double hull 72 of the carrier, and a primary sealing membrane and a secondary membrane. and between the secondary sealing membrane and the double hull 72, respectively.

In a manner known per se, a loading/unloading pipeline 73 arranged on the upper deck of the carrier is a marine or port terminal for the transfer of LNG cargo to and from the tank 71 by means of suitable connectors. can be connected to

10 also shows an example of a marine terminal comprising a loading and unloading station 75 , an underwater pipe 76 and an onshore facility 77 . The loading and unloading station 75 is a stationary offshore installation comprising a mobile arm 74 and a tower 78 supporting the mobile arm 74 . The mobile arm 74 carries a bundle of insulated flexible hoses 79 which can be connected to a loading/unloading pipeline 73. The directional movable arm 74 can be adjusted to fit all sizes of liquefied gas carriers. A connecting pipe (not shown) extends inside the tower 78 . Loading and unloading station 75 allows loading and unloading of liquefied gas carrier 70 to or from shore facility 77 . The installation comprises a liquefied gas storage tank 80 and a connecting pipe 81 connected to a loading or unloading station 75 by means of a submersible pipe 76. The submersible pipe 76 enables the transfer of liquefied gas between the loading or unloading station 75 and the onshore facility 77 over a distance of, for example, 5 km, so that loading and unloading operations can be performed remotely from the shore. Allows the weakening gas carrier 70 to be maintained.

To create the pressure required to deliver the liquefied gas, a pump aboard the carrier 70 and/or a pump aboard the shore facility 77 and/or a pump aboard the loading and unloading station 75 is used. .

Although the present invention has been described with reference to several specific embodiments, it is to be understood that the present invention is not limited thereto and includes all technical equivalents of the described means and combinations thereof, provided that they fall within the scope of the present invention as defined in the claims. It's obvious.

Use of the verbs "comprise" or "include" and their conjugations does not exclude the presence of other elements or other steps in addition to those recited in the claims.

Reference signs in parentheses in the claims shall not be construed as limiting the claim.

1: support structure
3: upper support wall
11: ceiling wall
12, 15: insulation barrier
17: sealing membrane
19: dome structure
22: barrel
33: lower end
25, 29: closing plate

Claims (20)

A liquefied gas storage facility comprising a support structure (1) and a closed and insulated tank disposed on the support structure (1), wherein the closed and insulated tank has an inner space, and the support structure (1) has an upper support wall ( 3), wherein the tank includes a ceiling wall 11 fixed to the upper support wall 3, and the ceiling wall 11 includes at least one heat insulating barrier in the thickness direction from the outside to the inside of the tank 12, 15) and at least one sealing membrane (17) supported by the thermal insulation barriers (12, 15) and adapted to contact the liquefied gas contained in the tank;
The storage facility includes a dome structure 19 passing through an opening 18 formed in a ceiling wall 11 and an upper support wall 3, and the dome structure 19 includes a barrel 22 extending in the thickness direction wherein the barrel 22 has a lower end 33 facing the inner space of the tank and at least one closure plate 25 positioned towards the lower end 33 of the barrel 22 in such a way as to cover the barrel; 39), wherein the closure plate 25 includes at least one hole 27, 28, 29,
The storage facility includes at least one pipe (20, 21, 31, 38, 44) for conveying liquefied gas, the pipe (20, 21, 31) passing through the dome structure (19) and a closing plate ( A liquefied gas storage facility characterized in that it passes through holes (27, 28, 29) formed in (25). According to claim 1,
The closure plate (25) is fixed to the barrel (22), and the pipes (20, 21, 31) are mounted so as to be freely translated in the thickness direction inside the holes (27, 28, 29). storage facility. According to claim 2,
Liquefied gas storage facility, characterized in that the closure plate (25) is fixed to the barrel (22) by means of a plurality of fixing elements (26). According to claim 3,
liquefied gas storage facility, characterized in that the fixing element is a gusset fixed on the one hand to the inner surface of the barrel (22) and on the other hand to the upper surface of the closure plate (25). According to claim 1,
The liquefied gas storage facility, characterized in that the closing plate (25) is fixed to the pipe (38) by at least two reinforcing plates (40). According to any one of claims 1 to 5,
A liquefied gas storage facility, characterized in that it comprises two closure plates (25, 39) fixed to each other by at least two metal sheets (41) forming a spacer maintaining a distance between the two closure plates. According to any one of claims 1 to 6,
The dome structure 19 fills the inside of the barrel 22 and includes a heat insulating packing 30 seated on the closure plate 25. Liquefied gas storage facility. According to claim 7,
A liquefied gas storage facility, characterized in that a mesh (34) is interposed between the insulation packing (30) and the sealing plate (25). According to claim 7 or 8,
The insulating packing 30 is a liquefied gas storage facility, characterized in that selected from glass wool, rock wool and insulating foam. According to any one of claims 1 to 6,
Liquefied gas storage, characterized in that the dome structure (19) comprises an insulating packing (42) covering the outer surface (30) of the barrel (22) protruding beyond the upper support wall (3) of the support structure (1) facility. According to any one of claims 1 to 10,
The liquefied gas storage facility, characterized in that the pipe is fixed to the closure plate (25) and connected to a spray bar (36) comprising one or more spray nozzles (37). According to claim 11,
The liquefied gas storage facility, characterized in that the spray bar (36) is annular. According to any one of claims 1 to 12,
The liquefied gas storage facility, characterized in that the closure plate (25) is disposed in the inner space of the sealed insulated tank at a predetermined distance from the lower end (33) of the barrel (22). According to any one of claims 1 to 13,
In a vertical projection in the plane of the lower end (33) of the barrel (22), the closure plate (25) covers at least 80% of the cross section of the lower end (33) of the barrel (22). gas storage facility. According to any one of claims 1 to 14,
The closure plate 25 includes a plurality of holes 27, 28, and 29, and the liquefied gas storage facility includes a plurality of pipes 20, 21, and 31 configured to transport liquefied gas, each pipe ( 20, 21, 31 passes through the dome structure (19) and passes through one of the holes (27, 28, 29) formed in the closure plate (25). According to claim 15,
At least one pipe (21) is for unloading the liquefied gas contained in the tank, and the pipe (21) extends to the vicinity of the bottom wall of the tank and has an unloading pump. According to claim 15 or 16,
Liquefied gas storage facility, characterized in that at least one pipe (20) is for loading the liquefied gas stored in the tank. A carrier vessel (70) for transporting fluid, comprising a hull (72) and a liquefied gas storage facility according to any one of claims 1 to 17, wherein the hull of the carrier vessel (70) forms a support structure. (70). A liquefied gas transport system, comprising: a carrier vessel (70) according to claim 18; an insulated pipeline (73) arranged to connect a tank (71) installed on the hull of the carrier vessel to a floating or land storage facility (77); 79, 76, 81), and a liquefied gas delivery system comprising a pump for pumping fluid through an insulated pipeline between the tank of the carrier and a floating or land storage facility. A method for loading or unloading a carrier vessel (70) according to claim 18, wherein the fluid is transported through an insulated pipeline between a tank of the carrier vessel (70) and a floating or onshore storage facility (77). How to load.

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