A thin-film land-based storage tank

Abstract

The present application provides a thin-film land-based storage tank, which includes a concrete outer shell, a second shielding layer, a first shielding layer, a ceiling insulation layer, and a support layer. The first shielding layer is arranged inside the second shielding layer. The first shielding layer includes a plurality of shielding blocks, and the shielding blocks are standard prefabricated parts. Each shielding block is provided with a corrugated structure. After the plurality of shielding blocks are rotated by a preset angle, they are connected in sequence so that the corrugated structures in two adjacent shielding blocks are arranged in a cross pattern. The plurality of shielding blocks are connected to each other in sequence along the outer edge and enclose an open-air area after connection. The ceiling insulation layer is arranged above the first shielding layer and encloses a closed area with the open-air area, and the closed area is used for storing liquefied gas. The present application reduces the construction difficulty of the thin-film land-based storage tank and the first shielding layer therein.

Description

Technical Field

[0001] This application relates to the technical field of onshore storage tanks, and more particularly, to a thin-film onshore storage tank. Background Art

[0002] With the rapid economic development and the continuous improvement of environmental governance requirements, liquefied natural gas has become the preferred alternative energy to oil due to its green, environmentally friendly and efficient advantages. At the same time, liquefied natural gas has also become one of the fastest-growing energy industries globally. With the continuous increase in the demand for liquefied natural gas, receiving terminals have developed rapidly. As an important device of the receiving terminal, onshore storage tanks are used to unload liquefied natural gas from liquefied gas carriers. As a new type of storage tank, thin-film onshore storage tanks have received extensive attention because their structure, insulation and airtightness functions are clearly separated, enabling each part to be optimized and effectively avoiding accidents.

[0003] Currently, thin-film onshore storage tanks usually include a first shielding layer and a second shielding layer. However, the first shielding layer is usually composed of corrugated plates overlapping each other. When arranging the first shielding layer, personnel need to weld each overlapping position, and the welding work is complex and the construction difficulty is large, resulting in the inability to use automatic welding methods and large fluctuations in welding quality. And a large number of strengthening wedges usually need to be arranged below the first shielding layer to enhance the support strength of the first shielding layer and reduce the deformation of the corrugated plates. However, in actual construction and the process of storing and using liquefied gas, the effect of the strengthening wedges is very small, and the first shielding layer will still undergo irreversible deformation. Summary of the Invention

[0004] The purpose of the embodiments of this application is to provide a thin-film onshore storage tank, which solves the above problems by setting a plurality of standard parts of the first shielding layer, setting protrusions in the standard parts, welding the edges of the standard parts automatically to realize the construction of the first shielding layer, and arranging a support layer below the first shielding layer to repair the deformation of the first shielding layer.

[0005] In a first aspect, a thin-film onshore storage tank is provided, comprising:

[0006] A concrete outer shell, located on the outermost side;

[0007] A second shielding layer, arranged inside the concrete outer shell;

[0008] A first shielding layer, arranged inside the second shielding layer. The first shielding layer includes a plurality of shielding blocks, which are standard prefabricated parts. Each shielding block is provided with a corrugated structure. After rotating a preset angle, the plurality of shielding blocks are connected in sequence so that the corrugated structures in adjacent two shielding blocks are arranged in a cross pattern. The plurality of shielding blocks are connected to each other in sequence along the outer edge and enclose an open area after connection;

[0009] A ceiling insulation layer is arranged above the first shielding layer and encloses a closed area with the open-air area. The closed area is used to store liquefied gas;

[0010] A support layer is located between the first shielding layer and the second shielding layer and is arranged in contact with the first shielding layer. The support layer includes a plurality of support blocks. The plurality of support blocks have the same structure as the shielding blocks. The support blocks and the shielding blocks are arranged in one-to-one correspondence, and the corrugated structure inside the support block is closely attached to the corrugated structure inside the shielding block. The material of the support block is set as a recoverable deformation material;

[0011] The corrugated structure includes three arc structures with the same radius. The three arc structures are connected in sequence. Among them, the center of the middle arc structure is located on the base surface of the shielding block. One end of the two arc structures on both sides is tangentially connected to the middle arc structure, and the other end of the two arc structures on both sides is tangentially connected to the base surface of the shielding block.

[0012] In an implementation scheme, the shielding block is set in a square shape, and a plurality of corrugated structures parallel to the sides are evenly arranged inside the shielding block; two adjacent shielding blocks are connected by rotating 90 degrees to realize the cross arrangement of the corrugated structures inside the two shielding blocks.

[0013] In an implementation scheme, a plurality of shielding blocks in the first shielding layer and a plurality of support blocks in the support layer are welded by an automatic welding method.

[0014] In an implementation scheme, the support block is made of nickel-titanium alloy material.

[0015] In an implementation scheme, it further includes a first insulating board and a second insulating board. The first insulating board is arranged between the concrete shell and the second shielding layer, and the second insulating board is arranged between the second shielding layer and the support layer; the first insulating board includes a plurality of first insulating modules, the second insulating board includes a plurality of second insulating modules, and the first insulating modules and the second insulating modules are arranged in a staggered manner so that the connection seams of the plurality of first insulating modules are staggered from the connection seams of the plurality of second insulating modules.

[0016] In an implementation scheme, the second shielding layer is made of a low-temperature resistant material with a thickness of 1 - 3 mm.

[0017] In an implementation scheme, the first insulating module and the second insulating module are prefabricated parts of the same material and the same size, and the length and width dimensions of the prefabricated parts are the same as those of the standard prefabricated parts of the shielding block.

[0018] In an implementation scheme, the first insulating board and the second insulating board are made of polyurethane foam material with a density of 50 - 400 kg / m 3, with a thickness of 150 - 500 mm.

[0019] In one embodiment, a support body is arranged between the concrete shell, the first insulating board, the second shielding layer, the second insulating board, the support layer and the first shielding layer, and the material of the support body is any one of wood, fiberglass and polytetrafluoroethylene.

[0020] The beneficial effects of the thin-film land-based storage tank in this application are as follows:

[0021] 1. Compared with the existing shielding layer corrugated structure, in this application, the first shielding layer of the thin-film land-based storage tank is set as a plurality of standard prefabricated parts, and a corrugated structure is arranged in the standard prefabricated parts. During the construction process, only the edges of the standard parts need to be welded. And the standard prefabricated parts are rotated by a predetermined angle to achieve the staggering of the corrugation directions, which reduces the types of system components, facilitates standardized production and management, and improves the production efficiency and precision of the standard parts. And during the installation process, different standard parts are connected to each other, and only the flat surfaces of the edges of the standard parts are butted, without corrugated arc surfaces, which is convenient for automatic welding, greatly improves the construction efficiency, and shortens the production time.

[0022] 2. Compared with the existing method of arranging a large number of wooden or aluminum pads or reinforcing wedges under the first shielding layer, in this application, a support layer is arranged in a fitting manner under the first shielding layer. The support layer has the same corrugated structure as the first shielding layer, and the support layer is made of a recoverable deformation material, which solves the problem of difficult repair of the first shielding layer.

[0023] 3. In this application, the first insulating module and the second insulating module are set as prefabricated parts of the same specification, which improves the versatility of the insulating modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 FIG. is a schematic structural diagram of a thin-film land-based storage tank shown according to an embodiment of the present application;

[0026] Figure 2 FIG. is a schematic structural diagram of a shielding block shown according to an embodiment of the present application;

[0027] Figure 3 FIG. is a partial structural schematic diagram of a first shielding layer shown according to an embodiment of the present application;

[0028] Figure 4A cross-sectional view of a corrugated structure shown according to an embodiment of the present application;

[0029] Figure 5 is Figure 1 an A-A cross-sectional view of a thin-film onshore storage tank shown.

[0030] 100, concrete outer shell; 200, first insulating board; 210, first insulating module; 300, second shielding layer; 400, second insulating board; 231, second insulating module; 500, support layer; 600, first shielding layer; 610, shielding block; 611, corrugated structure; 6111, first arc structure; 6112, intermediate arc structure; 6113, second arc structure; 612, base surface; 700, ceiling insulating layer. Detailed implementation manners

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and illustrated herein can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0033] Figure 1 A structural schematic diagram of a thin-film onshore storage tank shown according to an embodiment of the present application. Refer to Figure 1 , the thin-film onshore storage tank of the present application includes a concrete outer shell 100, a second shielding layer 300, a support layer 500, a first shielding layer 600, and a ceiling insulating layer 700.

[0034] Among them, the first shielding layer 600 includes a plurality of shielding blocks 610, and each shielding block 610 is provided with a corrugated structure 611. The outer edges of the plurality of shielding blocks 610 are connected in a preset direction so that the corrugated structures 611 in two adjacent shielding blocks 610 are arranged in a cross pattern (refer to Figure 3 ), and the plurality of shielding blocks 610 are sequentially connected to each other along the outer edges and enclose an open area after connection;

[0035] The ceiling insulating layer 700 is arranged above the first shielding layer 600 and encloses a closed area with the open area of the first shielding layer 600, and this closed area is used to store liquefied gas;

[0036] The support layer 500 is located between the first shielding layer 600 and the second shielding layer 300, and is arranged in contact with the first shielding layer 600. The support layer 500 includes a plurality of support blocks, which have the same structure as the shielding blocks 610. The support blocks and the shielding blocks 610 are arranged in one-to-one correspondence. The corrugated structure inside the support blocks is arranged in contact with the corrugated structure inside the shielding blocks 610. The support blocks are made of memory material.

[0037] In the above implementation process, the first shielding layer arranged in the concrete shell of the thin-film land-based storage tank is set to be composed of a plurality of shielding blocks connected together. The shielding blocks are standard prefabricated parts, which are convenient for standardized production and management, and improve the production efficiency and accuracy of standard parts. During the construction of the first shielding layer, only the outer edges of the shielding blocks need to be welded to complete the construction work of the first shielding layer, reducing the welding difficulty of the first shielding layer.

[0038] In addition, only by welding the outer edges of the shielding blocks, the full-automatic welding can be realized for the welding of the first shielding layer, improving the manufacturing quality of the thin-film land-based storage tank.

[0039] Then, a support plate with the same structure as the shielding block is closely arranged in contact below the first shielding layer. The support layer is made of a recoverable deformation material. During the actual application process, the support layer will deform with the first shielding layer. By heating and warming the dry air or inert gas in the storage tank to increase the temperature inside the thin-film land-based storage tank, the support plate can automatically return to the shape before deformation, thereby driving the first shielding layer to return to the shape before deformation. In this application, instead of the traditional support method of arranging strengthening wedges at the corrugations of the first shielding layer, this application combines the support layer with local heating, and does not need to remove the installed insulation board, that is, the corrugations at the deformed parts can be restored.

[0040] Figure 4 For a cross-sectional view of a corrugated structure shown according to an embodiment of the present application, see Figure 4 , the corrugated structure 611 is composed of three arc structures with the same radius connected in tangent in sequence. Among them, the center of the middle arc structure 6112 is located on the base surface 612 of the shielding block 610, and the arc structures on both sides (the first arc structure 6111 and the second arc structure 6113) are connected in tangent to the base surface 612 of the shielding block 610. The corrugated structure 611 adopts three arc structures with the same radius and tangent to each other. While improving the strength of the first shielding layer 600 and the support layer 500, it ensures that the corrugated plate of the shielding block 610 is smooth and continuous, without sharp corners or curvature mutation points. When the support layer 500 is heated and restored to its shape, the deformation recovery effect is the best.

[0041] In order to improve the generality of the standard parts in the first shielding layer 600, reduce the types of standard parts, and improve the construction efficiency, in an implementable solution, the shielding block 610 is set to be square-shaped, see Figure 2, a plurality of corrugated structures 611 parallel to the edges are evenly arranged in the shielding block 610. Then, the corrugated structures 611 in the two adjacent shielding blocks 610 are connected by rotating 90 degrees to realize a cross arrangement, that is, the corrugated staggered effect of the two adjacent shielding blocks 610 is realized by rotating the angle. Under the premise of realizing the staggered corrugations during the construction process, the operation difficulty is low, and the construction efficiency is improved. In addition, by arranging the corrugated structure 611 inside the shielding block 610, the complex connection structure of the existing corrugated plate is avoided. The corrugations of the first shielding layer 600 and the supporting layer 500 are only within the size of a single standard part. Different standard parts are connected to each other during the installation process, and only the edge planes of the standard parts are butted, without the corrugated arc surface, which is convenient for automatic welding, greatly improving the construction efficiency and shortening the production time.

[0042] In one embodiment, the plurality of shielding blocks 610 in the first shielding layer 600 and the plurality of supporting blocks in the supporting layer 500 are welded by automatic welding. By adopting the automatic welding method, the construction structure of the first shielding layer 600 is stable, and the construction quality and efficiency are high.

[0043] In one embodiment, the support layer 500 may be a memory alloy, such as nickel-titanium alloy, cadmium alloy, zinc alloy, etc. The memory alloy has supporting strength and can replace the traditional reinforcing wedge to improve the strength of the first shielding layer 600. On the other hand, the memory alloy can recover its deformation after being heated. By heating the dry air or inert gas in the storage tank to recover the deformation, the first shielding layer 600 can be repaired.

[0044] In one embodiment, the thin film land storage tank further includes a first insulating plate 200 and a second insulating plate 400, the first insulating plate 200 includes a plurality of first insulating modules 210, the second insulating plate 400 includes a plurality of second insulating modules 231, and the first insulating modules 210 and the second insulating modules 231 are arranged in a staggered manner so that the connection seams of the plurality of first insulating modules 210 and the connection seams of the plurality of second insulating modules 231 are arranged in a staggered manner. The two layers of insulating modules are arranged in a staggered manner, and the staggered length of the connection seams can be half the length of a single module to minimize the heat permeability problem of the plate gap. The gaps between the insulating modules are filled with insulating fillers of the same material to ensure insulation and thermal insulation performance.

[0045] In one embodiment, the second shielding layer 300 in the present application is made of a low temperature resistant material with a thickness of 1-3 mm. The low temperature resistant material is stainless steel, high nickel steel, invar steel plate, aluminum alloy steel plate, etc. Furthermore, the second shielding layer 300 is made of a flexible film material, which is complex to construct, has low rigidity, and poor protection capability.

[0046] In one embodiment, the first insulation module 210 and the second insulation module 231 are prefabricated parts of the same material and the same size, and the length and width dimensions of the prefabricated parts are consistent with those of the standard prefabricated parts of the shielding block 610. Using insulation module prefabricated parts of the same material and the same size improves the versatility of the components, reduces the difficulties in procurement, warehousing, and construction management, and reduces the costs of insulation module production and installation. It improves the standardization degree of the components and reduces the number of component categories.

[0047] In one embodiment, the first insulation board and the second insulation board are made of polyurethane foam material with a density of 50 - 400 kg / m 3 , and the thickness is 150 - 500 mm.

[0048] In one embodiment, a support body is arranged between the concrete shell 100, the first insulation board 200, the second shielding layer 300, the second insulation board 400, the support layer 500, and the first shielding layer 600, and the material of the support body is any one of wood, fiberglass, and polytetrafluoroethylene.

[0049] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A thin-film land-based storage tank, characterized in that, it includes: a concrete outer shell, located on the outermost side; a second shielding layer, arranged inside the concrete outer shell; a first shielding layer, arranged inside the second shielding layer, the first shielding layer includes a plurality of shielding blocks, the shielding blocks are standard prefabricated parts, each shielding block is provided with a corrugated structure, the plurality of shielding blocks are sequentially connected after rotating a preset angle, so that the corrugated structures in adjacent two shielding blocks are arranged in a cross manner, the plurality of shielding blocks are sequentially connected to each other along the outer edge, and enclose an open area after connection; a ceiling insulation layer, arranged above the first shielding layer, and encloses a closed area with the open area, and the closed area is used for storing liquefied gas; a support layer, located between the first shielding layer and the second shielding layer, and arranged in close contact with the first shielding layer, the support layer includes a plurality of support blocks, the plurality of support blocks have the same structure as the shielding blocks, the support blocks and the shielding blocks are arranged in one-to-one correspondence, and the corrugated structure in the support block is in close contact with the corrugated structure in the shielding block, and the material of the support block is set as a recoverable deformation material; the corrugated structure includes three arc structures with the same radius, the three arc structures are sequentially connected, wherein, the center of the middle arc structure is located on the base surface of the shielding block, one ends of the two arc structures on both sides are tangentially connected to the middle arc structure, and the other ends of the two arc structures on both sides are tangentially connected to the base surface of the shielding block.

2. A thin-film land-based storage tank according to claim 1, characterized in that, the shielding block is set in a square shape, and a plurality of corrugated structures parallel to the sides are evenly arranged in the shielding block; adjacent two shielding blocks are connected by rotating 90 degrees to realize the cross arrangement of the corrugated structures in the two shielding blocks.

3. A thin-film land-based storage tank according to claim 1, characterized in that, the plurality of shielding blocks in the first shielding layer and the plurality of support blocks in the support layer are welded by an automatic welding method.

4. A thin-film land-based storage tank according to claim 1, characterized in that, the support block is made of nickel-titanium alloy material.

5. A thin-film land-based storage tank according to claim 1, characterized in that, it further includes a first insulating board and a second insulating board, the first insulating board is arranged between the concrete outer shell and the second shielding layer, and the second insulating board is arranged between the second shielding layer and the support layer; the first insulating board includes a plurality of first insulating modules, the second insulating board includes a plurality of second insulating modules, and the first insulating modules and the second insulating modules are arranged in a staggered manner, so that the connection seams of the plurality of first insulating modules are staggered from the connection seams of the plurality of second insulating modules.

6. A thin-film land-based storage tank according to claim 1, characterized in that, the second shielding layer is made of a low-temperature resistant material, and the thickness is 1-3 mm.

7. A thin-film land-based storage tank according to claim 5, characterized in that, the first insulating module and the second insulating module are prefabricated parts of the same material and the same size, and the length dimension and width dimension of the prefabricated parts are the same as those of the standard prefabricated parts of the shielding blocks.

8. A thin-film land-based storage tank according to claim 5, characterized in that, The first insulating board and the second insulating board are made of polyurethane foam material with a density of 50-400 kg / m 3 , and the thickness is 150-500 mm.

9. A thin-film land-based storage tank according to claim 5, characterized in that, a support body is arranged between the concrete outer shell, the first insulating board, the second shielding layer, the second insulating board, the support layer and the first shielding layer, and the material of the support body is any one of wood, fiberglass and polytetrafluoroethylene.

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