Land LNG (Liquefied Natural Gas) storage cabin

Abstract

The embodiment of the invention provides a land LNG (Liquefied Natural Gas) storage cabin which comprises an outer tank, a heat insulation structure, an inner cabin and the like, and a plurality of storage tank units are constructed in the storage cabin; a plurality of wall bodies are constructed in the storage cabin, a plurality of storage spaces are formed between the wall bodies and between the wall bodies and the tank wall of the outer tank, and inner cabins are arranged in the storage spaces to form storage tank units. The wall body is constructed in the storage cabin, the dome span of the outer tank is reduced through the wall body, and the dome load of the outer tank is reduced. The storage tank structure stability can be improved, and the storage tank volume is increased. And the risk caused by large span of the dome of the outer tank can be solved, and the safety of the storage tank is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cryogenic storage tanks, and in particular relates to a land LNG storage tank. Background Art

[0002] Cryogenic storage tanks are an important part of the cryogenic energy supply chain and are mainly used to store cryogenic liquids. Currently, common onshore cryogenic storage tanks include single-containment tanks, double-containment tanks, full-containment tanks, and membrane tanks. Among them, full-containment tanks are widely used in large-scale cryogenic storage tanks in China due to their high safety and small footprint.

[0003] Full containment tanks usually adopt a vertical cylindrical structure. As the tank capacity continues to increase, the tank diameter increases and the dome span increases, which limits the development of large-scale tanks. At the same time, the outer tank of the tank is an independent structure, and the minimum spacing needs to be considered during the design, and the tank area occupies a large area. Summary of the invention

[0004] In view of the above problems existing in the prior art, an object of an embodiment of the present invention is to provide a land LNG storage tank.

[0005] The technical solution adopted in the embodiment of the present invention is a land LNG storage tank, including an outer tank and an inner tank, wherein a plurality of storage tank units are constructed in the storage tank;

[0006] A plurality of walls are constructed inside the outer tank, a plurality of storage spaces are formed between the walls and between the walls and the outer tank wall, and an inner cabin is arranged in the storage space to form a storage tank unit.

[0007] Furthermore, a heat-insulating structure is provided outside the inner cabin, and the heat-insulating structure fills the space outside the inner cabin in the storage tank unit.

[0008] Furthermore, the shape structure of the inner cabin matches the shape structure of the storage space where it is located.

[0009] Furthermore, the wall and the outer tank are constructed as an integrated structure.

[0010] Furthermore, the walls are arranged crosswise.

[0011] Furthermore, a transition structure is provided at the corner of the inner cabin, and the transition structure is used to transfer the load at the corner of the inner cabin to the wall or the outer tank.

[0012] Furthermore, the transition structure is a chamfered corner.

[0013] Furthermore, a stainless steel embedded part is embedded in the thermal insulation structure, the stainless steel embedded part is fixedly connected to the inner cabin, and the stainless steel embedded part is also fixedly connected to the wall or the outer tank.

[0014] Furthermore, the inner cabin is a membrane type structure.

[0015] Furthermore, the inner cabin adopts a film-type corrugated plate structure.

[0016] Compared with the prior art, the land LNG storage tank proposed by the present invention constructs a wall inside the outer tank, uses the wall to reduce the dome span of the outer tank, and reduces the dome load of the outer tank. It can improve the structural stability of the storage tank and increase the storage tank volume. It can also solve the risks caused by the large dome span of the outer tank and improve the safety of the storage tank.

[0017] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

[0018] This summary of various implementations or examples of the technology described in this disclosure is not a comprehensive disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the embodiments of the invention. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0020] Figure 1 It is a top view schematic diagram of the relevant single-row storage tank structure arrangement according to an embodiment of the present invention.

[0021] Figure 2 It is a top view schematic diagram of the double-row storage tank structure arrangement according to an embodiment of the present invention.

[0022] Figure 3 It is a top view schematic diagram of the relevant three-row storage tank structure arrangement according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of well-known functions and well-known components are omitted.

[0026] See also Figures 1 to 2 , an embodiment of the present invention provides a land LNG storage tank, including an outer tank 1, wherein a plurality of storage tank units are constructed in the storage tank;

[0027] A plurality of walls 2 are constructed inside the outer tank 1, and a plurality of storage spaces are formed between the walls 2 and between the walls 2 and the tank wall of the outer tank 1. An inner cabin 4 is arranged inside the storage space to form a tank unit. The land LNG storage tank proposed by the present invention constructs a wall 2 inside the outer tank 1, and utilizes the wall 2 to reduce the dome span of the outer tank 1 and reduce the dome load of the outer tank 1. It can improve the structural stability of the tank and increase the volume of the tank. It can also solve the risks brought by the large dome span of the outer tank 1 and improve the safety of the tank. According to the actual site and demand conditions, the tank unit can be arranged in a variety of types such as single-row, double-row, and three-row.

[0028] The outer part of the inner compartment 4 is provided with an insulating structure 3, and the insulating structure 3 fills the space outside the inner compartment 4 in the storage tank unit. The shape and structure of the inner compartment 4 match the shape and structure of the storage space in which it is located. The insulating structure 3 is preferably made of a hard high-strength insulating material, which can transfer the liquid load of the inner compartment 4 to the outer tank 1 or the wall 2, and a high-strength polyurethane material can be selected.

[0029] The wall 2 and the outer tank 1 are constructed as an integral structure, which helps to improve the overall structural strength of the tank, thereby improving the structural stability of the tank and improving the safety of the tank.

[0030] When the storage tank units are arranged in multiple rows, such as double rows, three rows, etc., the walls 2 are arranged crosswise. Adjacent storage tank units can share the walls 2, which can reduce construction costs.

[0031] A transition structure is provided at the corner of the inner cabin 4, and the transition structure is used to transfer the load at the corner of the inner cabin 4 to the wall 2 or the outer tank 1. The corner of the inner cabin 4 is generally weaker than other areas, and the transition structure can transfer the load at the corner of the inner cabin 4 to the wall 2 or the outer tank 1, thereby enhancing the strength of the corner of the inner cabin 4 and improving stability. The transition structure is a chamfered corner.

[0032] The insulation structure 3 is pre-embedded with stainless steel embedded parts, which are fixedly connected to the inner cabin 4 and are also fixedly connected to the wall 2 or the outer tank 1. The stainless steel embedded parts can enhance the connection stability of the inner cabin 4 and help the inner cabin 4 transfer the load to the wall 2 or the outer tank 1 through the insulation structure 4.

[0033] The inner cabin 4 is a film-type structure, which can compensate for the shrinkage and deformation of the inner cabin 4 under low-temperature working conditions.

[0034] The inner cabin 4 is made of a film-type corrugated plate structure. The inner cabin 4 is made of stainless steel material, which is conducive to ensuring liquid tightness in a low-temperature environment. The film-type corrugated plate structure can compensate for the shrinkage deformation caused by the low-temperature environment in the inner cabin 4.

[0035] The above description is intended to be illustrative rather than restrictive, and those skilled in the art may make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more of them) may be used in combination with each other, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations.

Claims

1. A land LNG storage tank, comprising an outer tank (1) and an inner tank (4), characterized in that: A plurality of storage tank units are constructed in the storage cabin; A plurality of walls (2) are constructed inside the outer tank (1), a plurality of storage spaces are formed between the walls (2) and between the walls (2) and the tank wall of the outer tank (1), and an inner cabin (4) is arranged in the storage space to form a storage tank unit.

2. A land LNG storage tank according to claim 1, characterized in that: A heat insulating structure (3) is provided outside the inner compartment (4), and the heat insulating structure (3) fills the space outside the inner compartment (4) in the storage tank unit.

3. A land LNG storage tank according to claim 1, characterized in that: The shape and structure of the inner compartment (4) matches the shape and structure of the storage space in which it is located.

4. A land LNG storage tank according to claim 1, characterized in that: The wall (2) and the outer tank (1) are constructed as an integrated structure.

5. A land LNG storage tank according to claim 1 or 4, characterized in that: The walls (2) are arranged crosswise.

6. A land LNG storage tank according to claim 1, characterized in that: A transition structure is provided at the corner of the inner cabin (4), and the transition structure is used to transfer the load at the corner of the inner cabin (4) to the wall (2) or the outer tank (1).

7. A land LNG storage tank according to claim 6, characterized in that: The transition structure is a chamfered corner.

8. A land LNG storage tank according to claim 2, characterized in that: A stainless steel embedded part is embedded in the thermal insulation structure (3), and the stainless steel embedded part is fixedly connected to the inner cabin (4), and the stainless steel embedded part is also fixedly connected to the wall (2) or the outer tank (1).

9. A land LNG storage tank according to claim 2, characterized in that: The inner cabin (4) is a membrane type structure.

10. A land LNG storage tank according to claim 9, characterized in that: The inner cabin (4) adopts a film-type corrugated plate structure.

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