Storage cabin with inner tank structure

Abstract

The embodiment of the invention provides a storage cabin with an inner tank structure, which comprises a plurality of storage tank units, each storage tank unit comprises an outer tank, an inner tank is constructed in an inner cavity of the outer tank by adopting a film type structure, the outer surface of the inner tank is matched with the surface of the inner cavity of the outer tank, and a hard cold insulation structure is constructed between the inner tank and the outer tank. And the inner tank is connected with the outer tank through a hard cold insulation structure. According to the storage bin with the inner tank structure, the inner tank is constructed in the inner cavity of the outer tank through the thin film type structure, and the liquid load in the tank can be transmitted to the outer tank; and a plurality of storage tank units are constructed, so that the occupied area of the storage cabin is small, and the storage cabin has larger volume and higher safety.

Description

Technical Field

[0001] The invention belongs to the technical field of low-temperature storage tanks, and in particular relates to a storage tank with an inner tank structure. 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 storage tank with an inner tank structure.

[0005] The technical solution adopted in the embodiment of the present invention is a storage tank with an inner tank structure, including multiple storage tank units, wherein the storage tank unit includes an outer tank, and the inner tank is constructed in the inner cavity of the outer tank using a thin film structure, the outer surface of the inner tank matches the inner cavity surface of the outer tank, a hard cold insulation structure is constructed between the inner tank and the outer tank, and the inner tank is connected to the outer tank through the hard cold insulation structure.

[0006] Furthermore, a plurality of stainless steel embedded parts are embedded in the hard cold-insulating structure, and the stainless steel embedded parts are connected to the inner tank.

[0007] Furthermore, a transition area is constructed at the corner of the inner tank, and the inner tank body in the transition area is constructed in a pleated shape.

[0008] Furthermore, a communication channel is provided between adjacent storage tank units, the communication channel passes through the hard cold-insulating structure and the outer tank, and both ends of the communication channel are respectively connected to the inner tank.

[0009] Furthermore, a communication port is provided on the inner tank, and the communication port is butt-connected with the communication channel.

[0010] Furthermore, the communication port is configured at the bottom end of the inner tank, and the communication channel is arranged at the bottom end of the storage tank unit.

[0011] Furthermore, the exterior of the communicating channel is coated with a heat-insulating structure.

[0012] Furthermore, the channel wall of the connecting channel is constructed in a corrugated plate type.

[0013] Furthermore, the outer tank is constructed as a cubic barrel-shaped structure, and the inner tank is constructed as a cubic barrel-shaped structure that matches the outer tank.

[0014] Furthermore, at least one storage tank unit is provided with a pump well, and the bottom end of the pump well extends to the bottom end of the inner tank cavity.

[0015] Compared with the prior art, the storage tank with an inner tank structure proposed in the present invention adopts a membrane-type structure to construct an inner tank in the inner cavity of an outer tank, which can transfer the liquid load in the tank to the outer tank; and by constructing multiple storage tank units, the storage tank occupies a smaller area, has a larger volume and higher safety.

[0016] 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.

[0017] 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

[0018] 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.

[0019] Figure 1 It is a schematic diagram of the cross-sectional structure of Example 1 of the present invention.

[0020] Figure 2 It is a schematic cross-sectional structure diagram of embodiment 2 of the present invention.

[0021] Figure 3 This is a schematic diagram of the inner tank opening of Example 2 of the present invention. DETAILED DESCRIPTION

[0022] 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.

[0023] 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.

[0024] 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.

[0025] Example 1

[0026] See also Figure 1 , an embodiment of the present invention provides a storage tank with an inner tank structure, including a plurality of storage tank units, wherein the storage tank unit includes an outer tank 1, an inner tank 3 is constructed in the inner cavity of the outer tank 1 by using a thin film structure, the outer surface of the inner tank 3 matches the inner cavity surface of the outer tank 1, a hard cold insulation structure 2 is constructed between the inner tank 3 and the outer tank 1, and the inner tank 3 is connected to the outer tank 1 through the hard cold insulation structure 2. The inner tank 3 is constructed in the inner cavity of the outer tank 1 by using a thin film structure, so that the liquid load in the tank can be transferred to the outer tank 1; and by constructing a plurality of storage tank units, the storage tank occupies a smaller area, has a larger volume and higher safety. The outer tank 1 is preferably constructed of high-strength materials such as concrete. In this embodiment, the outer tank 1 is constructed of concrete; the inner tank 3 is liquid-tight in a low-temperature environment, and its tank body is made of corrugated plate.

[0027] Several stainless steel embedded parts are embedded in the rigid cold insulation structure 2, and the stainless steel embedded parts are connected to the inner tank 3. The concrete structure construction of the outer tank 1 is completed first, and the rigid cold insulation structure 2 is constructed on the inner wall of the concrete after the concrete structure construction is completed. The stainless steel embedded parts are embedded in the rigid cold insulation structure 2 for welding the corrugated plate of the inner tank 3. The corrugated plate of the inner tank 3 is constructed after the construction of the thermal insulation structure 2 is completed. A pump well 4 is provided in the storage tank unit, and the bottom end of the pump well 4 extends to the bottom end of the inner cavity of the inner tank 3.

[0028] A transition area is configured at the corner of the inner tank 3, and the inner tank 3 body in the transition area is configured in a corrugated shape. The corrugated structure of the transition area can bear the stress deformation of the inner tank 3 at low temperature, thereby helping to improve safety.

[0029] This embodiment is a design scheme for an independent storage tank unit. There is no connecting device in different inner tanks 3, and each inner tank 3 is provided with an independent process system, such as an in-tank pump 4, etc.

[0030] The independent storage tank inner tank 3 design is adopted, and different inner tanks 3 can be set with different process parameters to store different cryogenic liquids, such as LNG, ethane, propane, etc.

[0031] By adopting the design of independent storage tank inner tank 3, different inner tanks 3 can also be set to different tank capacities, and the storage tank size of different media can be adjusted according to actual needs.

[0032] Example 2

[0033] See also Figures 2 to 3 On the basis of Example 1, a connecting channel 5 is provided between the adjacent storage tank units, the connecting channel 5 penetrates the hard cold-insulating structure 2 and the outer tank 1, and the two ends of the connecting channel 5 are respectively connected to the inner tank 3. A connecting structural design scheme is adopted. A connecting channel 5 is provided at the bottom of the two connected inner tanks 3, and the liquid in the tank can flow freely.

[0034] This embodiment adopts a design scheme of connecting storage tank units, which can uniformly adjust the liquid height in the tank, ensure uniform stress conditions in the storage tank structure, help improve safety, and can increase capacity.

[0035] Specifically, a communication port is opened on the inner tank 3 , and the communication port is butt-connected with the communication channel 5 .

[0036] The communication port is configured at the bottom end of the inner tank 3, and the communication channel 5 is provided at the bottom end of the storage tank unit. The outside of the communication channel 5 is covered with a heat preservation structure. The heat preservation structure insulates the communication channel 5, which helps to ensure the overall cold preservation effect of the storage tank.

[0037] The channel wall structure of the communication channel 5 is a corrugated plate type. The channel wall structure of the communication channel 5 of the corrugated plate type can bear stress deformation at low temperatures, thereby helping to improve safety.

[0038] The outer tank 1 is constructed as a cubic barrel structure, and the inner tank 3 is constructed as a cubic barrel structure matched with the outer tank 1. The outer tank 1 and the inner tank 3 are matched in shape, which can improve the structural strength, thereby simply improving safety.

[0039] At least one storage tank unit is provided with a pump well 4, the bottom end of which extends to the bottom end of the inner cavity of the inner tank 3. By adopting a connected structural design, different storage tank units can share a set of process systems, and there is no need to provide an in-tank pump 4 in each storage tank 3.

[0040] 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 storage tank with an inner tank structure, comprising a plurality of storage tank units, wherein the storage tank unit comprises an outer tank (1), characterized in that: An inner tank (3) is constructed in the inner cavity of the outer tank (1) by using a thin film structure, the outer surface of the inner tank (3) matches the inner cavity surface of the outer tank (1), a hard cold-insulating structure (2) is constructed between the inner tank (3) and the outer tank (1), and the inner tank (3) is connected to the outer tank (1) via the hard cold-insulating structure (2).

2. A storage tank with an inner tank structure according to claim 1, characterized in that: A plurality of stainless steel embedded parts are embedded in the hard cold-insulating structure (2), and the stainless steel embedded parts are connected to the inner tank (3).

3. A storage tank with an inner tank structure according to claim 1, characterized in that: A transition area is constructed at the corner of the inner tank (3), and the tank body of the inner tank (3) in the transition area is constructed in a folded shape.

4. A storage tank with an inner tank structure according to claim 1, characterized in that: A communication channel (5) is provided between adjacent storage tank units, the communication channel (5) passes through the hard cold-insulating structure (2) and the outer tank (1), and both ends of the communication channel (5) are respectively connected to the inner tank (3).

5. A storage tank with an inner tank structure according to claim 4, characterized in that: The inner tank (3) is provided with a communication port, and the communication port is butt-connected to the communication channel (5).

6. A storage tank with an inner tank structure according to claim 5, characterized in that: The communication port is configured at the bottom end of the inner tank (3), and the communication channel (5) is arranged at the bottom end of the storage tank unit.

7. The storage tank with an inner tank structure according to claim 4, characterized in that: The exterior of the communicating channel (5) is coated with a heat-insulating structure.

8. The storage tank with an inner tank structure according to claim 4, characterized in that: The channel wall of the connecting channel (5) is constructed in the form of a corrugated plate.

9. The storage tank with an inner tank structure according to claim 1, characterized in that: The outer tank (1) is constructed as a cubic barrel-shaped structure, and the inner tank (3) is constructed as a cubic barrel-shaped structure that matches the outer tank (1).

10. The storage tank with an inner tank structure according to claim 4, characterized in that: A pump well (4) is arranged in at least one storage tank unit, and the bottom end of the pump well (4) extends to the bottom end of the inner cavity of the inner tank (3).

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