CN219775450U - Double-layer composite film LNG storage tank - Google Patents
Double-layer composite film LNG storage tank Download PDFInfo
- Publication number
- CN219775450U CN219775450U CN202320172890.9U CN202320172890U CN219775450U CN 219775450 U CN219775450 U CN 219775450U CN 202320172890 U CN202320172890 U CN 202320172890U CN 219775450 U CN219775450 U CN 219775450U
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- Prior art keywords
- tank
- concrete
- lng storage
- layer
- double
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- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 239000004567 concrete Substances 0.000 claims abstract description 64
- 229910052751 metal Inorganic materials 0.000 claims abstract description 28
- 239000002184 metal Substances 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 26
- 239000010959 steel Substances 0.000 claims abstract description 26
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 20
- 239000010935 stainless steel Substances 0.000 claims abstract description 20
- 238000009413 insulation Methods 0.000 claims abstract description 19
- 238000003466 welding Methods 0.000 claims abstract description 14
- 238000013329 compounding Methods 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 4
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 4
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 4
- 239000011120 plywood Substances 0.000 claims description 4
- 239000011496 polyurethane foam Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims 1
- 238000005260 corrosion Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 4
- 239000010410 layer Substances 0.000 description 63
- 239000012528 membrane Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000011491 glass wool Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000002355 dual-layer Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000003915 liquefied petroleum gas Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
Abstract
The utility model discloses a double-layer composite film LNG storage tank, which aims to solve the problem that the large-scale development of the LNG storage tank can be limited due to the requirement of the upper limit of the use thickness of 9% Ni steel material of an inner tank of the existing LNG storage tank. The novel concrete tank comprises an inner tank metal film (2), an insulating layer (1), a concrete outer tank, a suspended ceiling (6) and a cold insulation layer (7) on the upper portion of the suspended ceiling, wherein the concrete outer tank is composed of a concrete tank bottom (3), a concrete tank wall (4) and a concrete tank top (5), the inner surfaces of the concrete tank bottom (3) and the concrete tank wall (4) are both the insulating layer (1), the inner surface of the insulating layer (1) is the inner tank metal film (2), the inner surface of the concrete tank top (5) is provided with a steel dome (9), the suspended ceiling (6) and the cold insulation layer (7) on the upper portion of the suspended ceiling are suspended below the steel dome (9) through a hanging rod (14), and the inner tank metal film (2) is formed by welding two layers of stainless steel plates with the thickness of 0.6-0.8 mm.
Description
Technical Field
The utility model relates to a double-layer composite film LNG storage tank.
Background
The prior LNG storage tank mainly comprises an inner tank made of 9% Ni steel, an outer tank made of prestressed concrete, a cold insulation system between the inner tank and the outer tank, accessories such as process instruments and the like. The inner tank consists of a 9% Ni steel bottom plate, a 9% Ni steel wall plate, an aluminum ceiling and the like, and is used as a main stress structure for bearing the load generated by LNG medium in the inner tank. However, the conventional LNG storage tank has a problem that the 9% Ni steel material for the inner tank has a larger thickness with the progress of the increase in the size of the LNG storage tank, but the upper limit of the use thickness of the 9% Ni steel material is 50mm at present, and the requirement of the progress of the increase in the size of the LNG storage tank cannot be satisfied.
Disclosure of Invention
The utility model aims to provide a double-layer composite film LNG storage tank, which solves the problem that the prior LNG storage tank can limit the large-scale development of the LNG storage tank due to the requirement of the upper limit of the use thickness of 9% Ni steel material of an inner tank.
In order to solve the problems, the utility model adopts the following technical scheme:
the utility model provides a double-deck composite film LNG storage tank which characterized in that: the double-layer composite film LNG storage tank comprises an inner tank metal film, an insulating layer, a concrete outer tank, a suspended ceiling and a cold insulation layer on the upper portion of the suspended ceiling, wherein the concrete outer tank consists of a concrete tank bottom, a concrete tank wall and a concrete tank top, the inner surfaces of the concrete tank bottom and the concrete tank wall are both insulating layers, the inner surfaces of the insulating layers are the inner tank metal film, the inner surface of the concrete tank top is provided with a steel dome, the cold insulation layer on the upper portion of the suspended ceiling and the cold insulation layer on the upper portion of the suspended ceiling are suspended below the steel dome through a suspender, and the inner tank metal film is formed by welding and compounding two layers of 0.6-0.8 mm stainless steel plates.
The utility model relates to a double-layer composite film LNG storage tank, which is further technically characterized in that: the two layers of stainless steel plates are formed by compounding through laser welding, and the shape of the two layers of stainless steel plates is preferably a bidirectional orthogonal corrugated shape.
The utility model relates to a double-layer composite film LNG storage tank, which is further technically characterized in that: the cold insulation layer is made of glass cotton felt.
The utility model relates to a double-layer composite film LNG storage tank, which is further technically characterized in that: the insulating layer is fixed in bolt holes on the concrete tank wall and the concrete tank bottom through bolts, and glass wool felt is preferably filled in the bolt holes.
The utility model relates to a double-layer composite film LNG storage tank, which is further technically characterized in that: the inner surface of the concrete tank wall and the inner surface of the concrete tank bottom are respectively provided with a moisture-proof layer, so that water vapor is prevented from penetrating into the insulating layer, and the moisture-proof layers are arranged between the concrete tank wall and the concrete tank bottom and the insulating layer.
The utility model relates to a double-layer composite film LNG storage tank, which is further technically characterized in that: the concrete tank wall is provided with secondary shielding films in the insulating layers in the area below 5 m high and in the area at the bottom of the concrete tank.
The utility model relates to a double-layer composite film LNG storage tank, which is further technically characterized in that: the insulating layer is composed of polyurethane foam plastic layers, upper and lower plywood and stainless steel strip-shaped steel plates pre-buried on the insulating layer, and the inner tank metal film is fixed on a plurality of groups of stainless steel strip-shaped steel plates through welding. The insulation layer is typically internally provided with a combustible gas monitoring system.
The utility model can be used for storing a large amount of LNG and also can store a large amount of low-temperature liquid hydrocarbon. The liquid hydrocarbon comprises low-temperature liquefied petroleum gas, low-temperature liquefied propylene, low-temperature liquefied ethylene and the like.
Compared with the prior art, the utility model has the following beneficial effects: 1) The metal film inner tank is of a non-self-supporting structure and is used for storing LNG, and liquid phase load and other loads applied to the metal film are all transferred to the concrete outer tank through the insulating layer capable of bearing the load. The metal film is formed by compounding two layers of stainless steel plates with the thickness of 0.6-0.8 mm through laser welding, is not limited by the thickness of steel, and is more beneficial to the large-scale development of the LNG storage tank. 2) The metal film is pressed into a bidirectional orthogonal corrugated shape by a special tool in a factory, and deformation of the metal film caused by expansion caused by heat and contraction caused by cold in the longitudinal direction and the transverse direction can be absorbed simultaneously.
The utility model will be described in further detail with reference to the drawings and the detailed description. The drawings and detailed description are not intended to limit the scope of the utility model.
Drawings
FIG. 1 is a schematic diagram of a dual-layer composite membrane LNG storage tank of the present utility model;
FIG. 2 is a schematic diagram of a tank wall and tank bottom insulation layer of a composite membrane LNG tank provided with a secondary shielding film;
FIG. 3 is a schematic diagram of a composite membrane LNG storage tank wall and tank bottom insulation layer of the present utility model;
FIG. 4 is a schematic illustration of the arrangement of a metal membrane of an inner tank of a composite membrane LNG tank of the present utility model;
fig. 5 is a schematic view of a simple structure of an inner tank metal film of a composite film LNG tank.
The reference numerals shown in the figures are:
1. an insulating layer; 2. an inner can metal film; 3. a concrete tank bottom; 4. a concrete tank wall; 5. a concrete tank top; 6. suspended ceiling; 7. a cold insulation layer at the upper part of the suspended ceiling; 8. a moisture barrier; 9. a dome; 10. polyurethane foam; 11. a plywood is arranged on the upper part and the lower part; 12. stainless steel strip-shaped steel plates; 13. a shielding film; 14. a bolt; 15. bolt holes; 16. and (5) hanging rods.
In fig. 1 to 5, the same reference numerals denote the same technical features.
Detailed Description
As shown in fig. 1 to 5, the double-layer composite film LNG storage tank of the present utility model comprises a concrete outer tank, an insulating layer 1, an inner tank metal film 2, a suspended ceiling 6 and a cold insulation layer 7 on the upper portion thereof.
The double-layer composite film LNG storage tank comprises an inner tank metal film 2, an insulating layer 1, a concrete outer tank, a suspended ceiling 6 and a cold insulation layer 7 at the upper part of the suspended ceiling, wherein the concrete outer tank is formed by a concrete tank bottom 3, a concrete tank wall 4 and a concrete tank top 5, the inner surfaces of the concrete tank bottom 3 and the concrete tank wall 4 are the insulating layer 1, the inner surface of the insulating layer 1 is the inner tank metal film 2, the inner surface of the concrete tank top 5 is provided with a steel dome 9, the cold insulation layer 7 at the upper part of the suspended ceiling 6 is suspended below the steel dome 9 through a suspension rod 14, the inner tank metal film 2 is formed by welding two layers of 0.6-0.8 mm stainless steel plates, preferably the stainless steel plates are formed by laser welding and compounding, and the two stainless steel plates are pressed into a bidirectional orthogonal corrugated shape by using a special tool.
The cold insulation layer 7 on the suspended ceiling 6 is preferably made of glass wool felt.
The insulating layer 1 is fixed on the concrete tank wall 4 and the concrete tank bottom 3 through bolts 14, and glass wool felt is filled in the bolt holes 15 preferably.
The insulating layer 1 is embedded on the concrete outer tank through bolts, is usually a standardized hexahedral module, and the local area is specially customized according to the shape of the structure; the inner tank metal film 2 is fixed on a plurality of groups of stainless steel bar-shaped steel plates pre-buried on the insulating layer 1 through welding.
Preferably, the inner surface of the concrete tank wall 4 and the inner surface of the concrete tank bottom 3 are provided with a moisture-proof layer 8, so that water vapor is prevented from penetrating into the insulating layer, and the moisture-proof layer 8 is arranged between the concrete tank wall 4 and the concrete tank bottom 3 and the insulating layer 1.
The inner surface of the concrete tank wall 4 is regular polygon.
The insulating layer 1 consists of polyurethane foam plastic 10, upper and lower plywood 11 and stainless steel strip-shaped steel plates 12 pre-buried at the upper part; the inner can metal film 2 is fixed to a plurality of sets of stainless steel strip-shaped steel plates 12 on the insulating layer 1 by welding.
The insulating layer 1 is a standardized hexahedral module, and the local area is specially customized according to the shape of the structure, such as the joint of the concrete tank wall 4 and the concrete tank bottom 3.
The tank wall 4 is provided with a secondary shielding film 13 in the insulating layer 1 in the area below 5 m and in the tank bottom area.
The insulating layer 1 is permanently placed in a nitrogen environment, and a combustible gas monitoring system is arranged inside the insulating layer 1.
The inner tank metal film 2 is formed by compounding two layers of stainless steel plates with the thickness of 0.6-0.8 mm through laser welding.
The inner can metal film 2 is embossed in a bi-directional orthogonal corrugation shape using a special tool at a factory.
The inner tank metal film 2 is fixed on a stainless steel bar-shaped steel plate 12 pre-buried in the insulating layer 1 through welding.
The suspended ceiling 6 is suspended below the steel dome 9 through a suspension rod 14 and is provided with a vent hole, so that medium evaporation gas can pass through the suspended ceiling; the cold insulation layer on the suspended ceiling 6 adopts a glass cotton felt 15.
Claims (10)
1. The utility model provides a double-deck composite film LNG storage tank which characterized in that: this double-deck composite film LNG storage tank includes inner tank metal film (2), insulating layer (1), outer jar of concrete, furred ceiling (6) and cold insulation layer (7) on furred ceiling upper portion, and outer jar of concrete comprises concrete tank bottom (3), concrete tank wall (4) and concrete tank top (5), the internal surface of concrete tank bottom (3) and concrete tank wall (4) is insulating layer (1), and the internal surface of insulating layer (1) is inner tank metal film (2), and concrete tank top (5) internal surface is equipped with steel dome (9), cold insulation layer (7) on furred ceiling (6) and furred ceiling upper portion hang below steel dome (9) through jib (16), inner tank metal film (2) are formed by two-layer 0.6 ~ 0.8mm corrosion resistant plate welding complex.
2. The double-layer composite film LNG storage tank of claim 1, wherein: the two layers of stainless steel plates are formed by laser welding and compounding.
3. The double-layer composite film LNG storage tank of claim 2, wherein: the shape of the two layers of stainless steel plates is a bidirectional orthogonal corrugated shape.
4. The double-layer composite film LNG storage tank of claim 1, wherein: the cold insulation layer (7) is made of glass cotton felt.
5. The double-layer composite film LNG storage tank of claim 1, wherein: the insulating layer (1) is fixed in bolt holes (15) on the concrete tank wall (4) and the concrete tank bottom (3) through bolts (14).
6. The double-layer composite film LNG storage tank of claim 5, wherein: and glass cotton felt is filled in the bolt holes (15).
7. The double-layer composite film LNG storage tank of claim 1, wherein: the inner surface of the concrete tank wall (4) and the inner surface of the concrete tank bottom (3) are both provided with a moisture-proof layer (8), so that water vapor is prevented from penetrating into the insulating layer, and the moisture-proof layer (8) is arranged between the concrete tank wall (4) and the concrete tank bottom (3) and the insulating layer (1).
8. The double-layer composite film LNG storage tank of claim 1, wherein: the concrete tank wall (4) is provided with secondary shielding films (13) in the insulating layer (1) in the area below 5 m high and in the area of the concrete tank bottom (3).
9. The double-layer composite film LNG storage tank of claim 1, wherein: the insulating layer (1) is composed of polyurethane foam plastic layers (10), upper and lower plywood (11) and stainless steel strip-shaped steel plates (12) pre-buried on the insulating layer (1), and the inner tank metal film (2) is fixed on a plurality of groups of stainless steel strip-shaped steel plates (12) through welding.
10. The double-layer composite film LNG storage tank of claim 1, wherein: the inside of the insulating layer (1) is provided with a combustible gas monitoring system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320172890.9U CN219775450U (en) | 2023-02-09 | 2023-02-09 | Double-layer composite film LNG storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320172890.9U CN219775450U (en) | 2023-02-09 | 2023-02-09 | Double-layer composite film LNG storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219775450U true CN219775450U (en) | 2023-09-29 |
Family
ID=88135734
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320172890.9U Active CN219775450U (en) | 2023-02-09 | 2023-02-09 | Double-layer composite film LNG storage tank |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219775450U (en) |
-
2023
- 2023-02-09 CN CN202320172890.9U patent/CN219775450U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |