Film type land storage tank enclosure system

Abstract

The invention provides an LNG film type land storage tank containment system which is divided into a structure above 5 meters and a structure below 5 meters, the structure below 5 meters is of a double-layer sealing structure which is distributed in a plane area, a corner area with two intersected faces and a corner area with three intersected faces, and the structure comprises a main layer sealing layer, a secondary layer sealing layer and a main layer heat insulation layer; the structure more than 5 meters is a single-layer sealing structure, is distributed in a plane area and a corner area where two surfaces intersect, and comprises a main layer sealing layer and a main layer heat insulation layer; and the main heat insulation layer is adhered to the tank body structure. Through the special hierarchical structure arrangement of the insulation modules, the low heat conduction performance of the system is guaranteed, the evaporation rate of the whole enclosure system is low, the installation steps are simplified through the single-layer heat insulation layer and the double-layer sealing layer structure, and the installation efficiency of the system is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of LNG storage, and particularly relates to a thin film type land storage tank enclosure system. BACKGROUND

[0002] The thin film type enclosure system has been widely applied to the shipping industry, and has stable performance and high safety. It also has great advantages when applied to the land storage tank system. SUMMARY

[0003] In order to solve the technical problems in the prior art, the application provides a thin film type land storage tank enclosure system, which is divided into a structure above 5 meters and a structure below 5 meters, and specifically:

[0004] The structure below 5 meters is a double-layer sealing structure, which is distributed in a tank wall area and a tank bottom area below 5 meters, and mainly includes a first main layer sealing layer, a first secondary layer sealing layer and a first main layer heat insulation layer; the first main layer sealing layer and the first secondary layer sealing layer are isolated by a first plywood, and the first plywood is bonded to the first secondary layer sealing layer; the first main layer heat insulation layer is bonded and installed on a tank body structure; the first main layer heat insulation layer includes a second plywood, a first insulation layer, a second secondary layer sealing layer and a third plywood arranged in sequence, and a stainless steel anchoring strip is installed on the upper portion of the third plywood and used for fixing the first main layer sealing layer; glass wool is filled between the modules of the first main layer heat insulation layer.

[0005] The structure above 5 meters is a single-layer sealing structure, which is distributed in a tank wall area above 5 meters and includes a second main layer sealing layer and a second main layer heat insulation layer; the second main layer heat insulation layer is bonded and installed on the tank body structure; the second main layer heat insulation layer includes a fourth plywood, a second insulation layer and a fifth plywood arranged in sequence; and glass wool is filled between the modules of the second main layer heat insulation layer.

[0006] Further, an angle corner area is arranged, the angle corner area is arranged after the first main layer heat insulation layer corresponding to the tank bottom portion is installed to the tank wall, the first main layer heat insulation layer corresponding to the tank wall portion is arranged on the upper surface of the bottom main layer heat insulation module, the first main layer heat insulation layer corresponding to the tank bottom portion is combined with the first main layer heat insulation layer corresponding to the tank wall at 90 degrees, and there is no gap between the combined surfaces.

[0007] Further, the second plywood, the first insulation layer, the second secondary layer sealing layer and the third plywood of the first main layer heat insulation layer of the double-layer sealing structure below 5 meters are fixed in the form of low-temperature glue bonding; the second plywood, the first insulation layer and the second secondary layer sealing layer have the same length and width dimensions, the length and width of the third plywood are smaller than those of the second plywood, the third plywood is bonded to the middle position of the second secondary layer sealing layer, and the first insulation layer and the second secondary layer sealing layer need to ensure liquid sealing function.

[0008] Further, the third plywood of the first main layer insulation layer is installed with the first main layer sealing layer.

[0009] Further, the second time layer sealing layer is a glass fiber aluminum foil composite material fixed on the upper surface of the first insulation layer by an adhesive.

[0010] Further, the fourth plywood, the second insulation layer and the fifth plywood of the second main layer insulation layer of the single-layer sealing structure of more than 5 meters are fixed in the form of low-temperature glue bonding, and the fourth plywood, the second insulation layer and the fifth plywood have the same length and width size.

[0011] Further, the fifth plywood of the second main layer insulation layer is installed with the second main layer sealing layer.

[0012] Further, temporary bolt holes are opened around the first main layer insulation layer and the second main layer insulation layer, and the heat insulation modules of the first main layer insulation layer and the second main layer insulation layer are temporarily fixed on the tank wall or the tank bottom by bolts.

[0013] Further, the bottom of the first main layer insulation layer and the second main layer insulation layer is coated with adhesive epoxy resin, and the heat insulation modules are permanently fixed on the tank wall and the tank bottom by the epoxy resin.

[0014] Further, the first main layer sealing layer and the second main layer sealing layer are metal films respectively welded on the second plywood and the fourth plywood.

[0015] Compared with the prior art, the beneficial effects of the present application are:

[0016] The enclosure system of the present application effectively improves the insulation effect and the strength of the structure by the simple structure of the main layer insulation module, ensures the low thermal conductivity of the system, makes the evaporation rate of the whole enclosure system low, the simple structure reduces the installation difficulty of the system, improves the construction efficiency, and shortens the construction period; the corner area arrangement cancels the corner area module form in the present application, reduces the types of installed modules, simplifies the complexity of system installation, reduces the installation difficulty, and shortens the installation period. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a schematic diagram of a thin film type land storage tank enclosure system in the present application;

[0018] Figure 2 is a structure schematic of a thin film type land storage tank enclosure system of less than 5m in the present application;

[0019] Figure 3 is a structure schematic of a thin film type land storage tank enclosure system of more than 5m in the present application;

[0020] Figure 4 is the main layer heat insulation layer structure schematic diagram of the 5m below planar area in the application;

[0021] Figure 5 is the main layer heat insulation layer structure schematic diagram of the 5m above planar area in the application;

[0022] Figure 6 is the top bridge block structure schematic diagram in the application;

[0023] Figure 7 is the tank wall corner area structure schematic diagram in the application;

[0024] Figure number and name: 1, main layer heat insulation layer, 101, first insulation layer, 102, first plywood, 103, secondary layer sealing layer, 104, second plywood, 105, metal anchoring strip, 2, foam plug, 3, secondary layer sealing layer, 4, top bridge block, 401, top bridge block plywood, 402, top bridge block metal anchoring strip, 5, main layer sealing layer, 6, epoxy adhesive mortar, 7, glass wool, 8, temporary fixing bolt, A, tank bottom main heat insulation layer; B, tank wall main heat insulation layer. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the technical solutions of the present application, the present application will be further described below in conjunction with the drawings and specific embodiments.

[0026] The present application provides a land storage tank thin film type enclosure system, which is distributed in a region above 5m and a region below 5m, and the enclosure system is divided into a structure above 5m and a structure below 5m. The structure below 5m is a double-layer sealing structure, which is distributed in a tank wall region and a tank bottom region below 5m, and the main structure includes a main layer sealing layer, a secondary layer sealing layer, and a main layer heat insulation layer. The main layer sealing layer and the secondary layer sealing layer are isolated by a plywood, and the plywood is bonded to the secondary layer sealing layer. The main layer heat insulation layer is bonded and installed on the tank body structure. The main layer heat insulation layer includes a first plywood, a first insulation layer, a secondary layer sealing layer, and a second plywood arranged in sequence. A stainless steel anchoring strip is installed on the upper part of the second plywood and is used to fix the main sealing layer. Glass wool is filled between the main layer heat insulation modules. The structure above 5m is a single-layer sealing structure, which is distributed in a tank wall region above 5m and includes a main layer sealing layer and a main layer heat insulation layer. The main layer heat insulation layer is bonded and installed on the tank body structure. The main layer heat insulation layer includes a first plywood, a first insulation layer, and a second plywood arranged in sequence. Glass wool is filled between the main layer heat insulation modules. The corner area is that after the bottom main layer heat insulation module is installed to the tank wall, the tank wall main layer heat insulation module is arranged on the upper surface of the bottom main layer heat insulation module, the bottom main layer heat insulation module is attached to the tank wall main layer heat insulation module at 90°, and there is no gap between the attached surfaces.

[0027] The first plywood, the first insulation layer, the secondary sealing layer, and the second plywood of the main layer insulation layer below 5 meters are fixed in the form of low-temperature glue bonding. The first plywood, the first insulation layer, and the secondary sealing layer have the same length and width size, and the length and width of the second plywood are smaller than those of the first plywood and are bonded at the middle position of the secondary sealing layer. The first insulation layer and the secondary sealing layer need to ensure the liquid sealing function.

[0028] The second plywood of the main layer insulation layer is installed with the main sealing layer at the upper part.

[0029] The secondary sealing layer is a glass fiber aluminum foil composite material and is fixed on the upper surface of the first insulation layer through an adhesive.

[0030] The first plywood, the first insulation layer, and the second plywood of the main layer insulation layer above 5 meters are fixed in the form of low-temperature glue bonding. The first plywood, the first insulation layer, and the second plywood all have the same length and width size.

[0031] The second plywood of the main layer insulation layer is installed with the main sealing layer at the upper part.

[0032] Temporary bolt holes are formed around the main insulation layer, and the insulation module is temporarily fixed on the tank wall and the tank bottom through bolts.

[0033] Epoxy resin is coated on the bottom of the main insulation layer, and the insulation module is permanently fixed on the tank wall and the tank bottom through the epoxy resin.

[0034] The main sealing layer is a metal film and is welded on the first plywood.

[0035] A 90° metal film is installed at the connection between the bottom main layer insulation module of the corner area and the main layer insulation module of the tank wall. The metal film is fixed on the secondary sealing layer of the bottom main layer insulation module and the main layer insulation module of the tank wall through an adhesive, adjacent metal films are connected and sealed through flexible aluminum foil fiber composite material, and the entire secondary sealing layer forms a sealed space through the metal film.

[0036] A plywood is bonded on the metal film sealing layer of the corner area, and the upper surface of the plywood is kept horizontal with the upper surface of the second plywood of the main layer insulation.

[0037] A 90° sealing layer is installed on the upper part of the plywood of the corner area. The 90° sealing layer is connected and sealed with the main sealing layer.

[0038] A metal isolation plate is embedded at 5 meters of the tank wall, the height of the metal isolation plate is lower than the secondary sealing layer of the main layer insulation module, the main layer insulation module below 5 meters is installed at the metal isolation plate, and the gap between the main layer insulation module and the metal isolation plate is filled with rigid insulation material and glass wool.

[0039] A 90° metal baffle plate is installed at the isolation plate, one side of the metal baffle plate is welded and fixed to the metal isolation plate, and the other side is tightly attached to the surface of the secondary sealing layer of the insulation module. A glass fiber aluminum foil composite material is bonded at the joint between the metal baffle plate and the secondary sealing layer of the insulation module to ensure the sealing of the secondary sealing layer.

[0040] A metal isolation plate is embedded at the top of the tank wall, the height of the metal isolation plate is lower than the upper surface of the second plywood of the main layer insulation module, and the main layer insulation module above 5 meters is installed at the metal isolation plate. The gap between the main layer insulation module and the metal isolation plate is filled with rigid insulation material and glass wool.

[0041] A 90° metal baffle plate is installed at the isolation plate, one side of the metal baffle plate is welded and fixed to the metal isolation plate, and the other side is tightly attached to the surface of the first plywood of the main layer insulation module. The metal baffle plate is welded to the main layer sealing layer to ensure the sealing of the main layer sealing layer.

[0042] A foam plug is also installed in the temporary bolt hole for filling.

[0043] The secondary shielding space is formed between the adjacent main layer insulation layers and between the main layer insulation layer and the secondary sealing layer in the area below 5 meters, and the main shielding space is formed between the adjacent first plywood and the main layer sealing layer. The main layer shielding space is formed between the adjacent main layer insulation layers and between the main layer insulation layer and the main layer sealing layer in the area above 5 meters.

[0044] Inert protective gas is filled in the main layer shielding space and the secondary shielding space, and temperature sensors and combustible gas sensors are also installed in the main layer shielding space and the secondary shielding space.

[0045] As shown in the drawings, Figures 1-7 The maintenance system according to the application comprises:

[0046] The main layer sealing layer 5, the secondary sealing layer 3, and the main layer insulation layer 1 are sequentially arranged; the secondary sealing layer 3 is bonded to the main layer insulation layer 1; and the main layer sealing layer 5 is welded to the metal anchor strip 105 on the second plywood of the main layer insulation layer 1. The gap between the main layer insulation layers is filled with glass wool 7, and the upper part of the gap is covered with the secondary sealing layer 3 to ensure the airtightness of the secondary space; the back of the first plywood 102 on the main layer insulation layer 1 is coated with epoxy adhesive mortar 6 and bonded to the bottom of the storage tank and the tank wall, and is temporarily fixed by temporary fixing bolts. After the epoxy adhesive mortar 6 hardens, the temporary bolt hole in the main layer insulation layer 1 is filled with a foam plug 2. The main layer insulation layer 1 below 5 meters includes the first plywood 102, the first insulation layer 101, the secondary sealing layer 103, and the second plywood 104 arranged sequentially; and the main layer insulation layer 1 above 5 meters includes the first plywood 102, the first insulation layer 101, and the second plywood 104 arranged sequentially.

[0047] The secondary sealing layer 3 is adhered to the upper space of the adjacent heat insulation layer 1 of the two primary layers, and the upper part of the secondary sealing layer is adhered to the top bridge block 4, so as to ensure the flatness of the upper surface of the primary heat insulation layer 1.

[0048] The corner area of the tank wall is not in the form of a traditional corner module, but is arranged in the form of stacking of the tank bottom main heat insulation layer A and the tank wall main heat insulation layer B. First, the tank bottom main heat insulation layer A module is arranged to the tank wall, and the side surface of the tank bottom main heat insulation layer A is attached to the tank wall. After the tank bottom main heat insulation layer A is installed, the tank wall main heat insulation layer B is installed, and the side surface of the tank wall main heat insulation layer B is attached to the secondary sealing layer of the tank bottom main heat insulation layer A. Then, a secondary sealing layer 3 is adhered to the contact gap between the tank bottom main heat insulation layer A and the tank wall main heat insulation layer B, so as to ensure the sealing property of the secondary sealing layer 3.

[0049] After the secondary sealing layer 3 in the corner area of the tank wall is installed, a 90° top bridge block 4 is adhered to the upper part of the secondary sealing layer 3, which is used to connect the top bridge block 4 of the tank bottom main heat insulation layer A and the tank wall main heat insulation layer B, so as to ensure the flatness of the upper surface of the primary heat insulation layer 1. Finally, the corner primary sealing layer 5 is installed on the upper surface of the primary heat insulation layer 1, so as to ensure the sealing property of the primary sealing layer.

[0050] In conclusion, the above is only the preferred embodiment of the present application, and does not limit the protection scope of the present application. Any equivalent changes and modifications made according to the patent scope and content of the present application are within the scope of the present application.

Claims

1. A membrane-type land-based storage tank containment system, comprising structures with a height of 5 meters or more and structures with a height of less than 5 meters, characterized in that: Below 5 meters, there is a double-layer sealing structure, distributed in the tank wall and bottom areas below 5 meters. The main structure includes a first main sealing layer, a first secondary sealing layer, and a first main insulation layer. The first main sealing layer and the first secondary sealing layer are separated by a first plywood, which is bonded to the first secondary sealing layer. The first main insulation layer is bonded to the tank structure. The first main insulation layer includes a second plywood, a first insulation layer, a second secondary sealing layer, and a third plywood arranged in sequence. Stainless steel anchoring strips are installed on the upper part of the third plywood to fix the first main sealing layer. Glass wool is filled between the modules of the first main insulation layer. The structure above 5 meters is a single-layer sealed structure, distributed in the tank wall area above 5 meters, including a second main sealing layer and a second main insulation layer; the second main insulation layer is bonded and installed on the tank structure; the second main insulation layer includes a fourth plywood, a second insulation layer, and a fifth plywood arranged in sequence. Glass wool is filled between the modules of the second main insulation layer.

2. The system according to claim 1, characterized in that: It also includes corner areas. In corner areas, after the first main insulation layer of the corresponding tank bottom part is installed on the tank wall, the first main insulation layer of the corresponding tank wall part is arranged on the upper surface of the bottom main insulation module. The first main insulation layer of the corresponding tank bottom part and the first main insulation layer of the corresponding tank wall part are attached at 90°, and there are no gaps between the attached surfaces.

3. The system according to claim 1, characterized in that: The second plywood, first insulation layer, second sealing layer, and third plywood of the first main heat insulation layer of the double-layer sealing structure below 5 meters are fixed by low-temperature adhesive bonding; and the second plywood, first insulation layer, and second sealing layer have the same length and width dimensions, while the length and width of the third plywood are smaller than those of the second plywood, and it is bonded in the middle of the second sealing layer; the first insulation layer and the second sealing layer need to ensure liquid sealing function.

4. The system according to claim 3, characterized in that: The first main layer sealing layer is installed on the upper part of the third plywood of the first main layer insulation layer.

5. The system according to claim 4, characterized in that: The second sealing layer is a glass fiber aluminum foil composite material, which is fixed to the upper surface of the first insulating layer by an adhesive.

6. The system according to claim 1, characterized in that: The fourth plywood, second insulation layer, and fifth plywood of the second main heat insulation layer of the single-layer sealing structure of more than 5 meters are fixed by low-temperature adhesive bonding, and the fourth plywood, second insulation layer, and fifth plywood all have the same length and width dimensions.

7. The system according to claim 6, characterized in that: The second main layer sealing layer is installed on the upper part of the fifth plywood of the second main layer insulation layer.

8. The system according to claim 1, characterized in that: Temporary bolt holes are opened around the first and second main insulation layers, and the insulation modules of the first and second main insulation layers are temporarily fixed to the tank wall or tank bottom by bolts.

9. The system according to claim 1, characterized in that: The bottom of the first and second main insulation layers is coated with adhesive epoxy resin, which permanently fixes the insulation module to the tank wall and tank bottom.

10. The system according to claim 1, characterized in that: The first main sealing layer and the second main sealing layer are metal films, which are respectively welded to the second plywood and the fourth plywood.

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