CN219102685U - Double-metal-wall full-capacity type low-temperature storage tank - Google Patents
Double-metal-wall full-capacity type low-temperature storage tank Download PDFInfo
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- CN219102685U CN219102685U CN202223491469.9U CN202223491469U CN219102685U CN 219102685 U CN219102685 U CN 219102685U CN 202223491469 U CN202223491469 U CN 202223491469U CN 219102685 U CN219102685 U CN 219102685U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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Abstract
The utility model relates to the technical field of low-temperature pressure containers, in particular to a double-metal-wall full-capacity low-temperature storage tank. The low-temperature storage tank comprises a top protection component and a bottom protection component, wherein the top protection component comprises a first heat insulation component, and the first heat insulation component is arranged on the inner wall of the top of the outer tank body in a surrounding mode, so that when a heat insulation material at the upper part of an annular gap heat insulation space is settled and the heat insulation effect is lost, the cold energy loss of a gaseous low-temperature medium in the annular gap heat insulation space can be reduced under the heat insulation effect of the first heat insulation component; the bottom protection component comprises a second heat insulation part, wherein the second heat insulation part is arranged on the inner wall of the bottom of the outer tank body in a surrounding mode, and the second heat insulation part is arranged on the heat insulation layer.
Description
Technical Field
The utility model relates to the technical field of low-temperature pressure containers, in particular to a double-metal-wall full-capacity low-temperature storage tank.
Background
Along with the sustainable development of the safety and environmental protection concept, the bimetal wall full-capacity low-temperature storage tank is more and more widely applied in engineering, and the large-scale trend of the storage tank is obvious. The full-capacity storage tank can ensure that liquid medium and gaseous medium cannot leak into the environment under any working condition (including inner tank leakage working condition), so that secondary disasters cannot occur. Compared with a prestressed concrete double-metal wall full-capacity type low-temperature storage tank with the same volume, the double-metal wall full-capacity type storage tank has the advantages of simple structure, convenience in construction, short construction period, low investment of a single tank and the like.
The bimetal wall full-capacity type low-temperature storage tank comprises an outer tank and an inner tank, wherein the inner tank contains liquid low-temperature medium, and a dome space above the liquid level, an annular heat insulation space in the outer tank and a tank bottom heat insulation space of the outer tank are filled with gaseous medium. However, as the length of service increases, loose insulation material in the upper portion of the tank annulus insulation will settle under the force of gravity, resulting in a lower tank wall temperature in the upper portion of the outer tank; when the inner tank is subjected to nondestructive leakage, part of liquid low-temperature medium can enter the annular heat-insulating space and settle to the bottom of the annular heat-insulating space, so that the temperature of the tank wall at the bottom of the outer tank is reduced, and the two conditions can lead to larger cold loss of the annular heat-insulating space of the storage tank, thereby influencing the benefit.
Disclosure of Invention
The application provides a bimetal wall full-capacity type low-temperature storage tank, which solves the technical problems that the bimetal wall full-capacity type low-temperature storage tank in the related technology has larger cold energy loss and affects the benefit.
The application provides a bimetal wall full capacity formula cryogenic storage tank, include:
the outer tank comprises an outer tank main body and a heat insulation layer, and the heat insulation layer is arranged at the bottom of the outer tank main body;
an inner tank disposed in the outer tank main body and on the heat insulating layer;
a top shield assembly including a first heat insulating member circumferentially disposed on an inner wall of the top of the outer can body;
the bottom protection assembly comprises a second heat insulation member which is arranged on the inner wall of the bottom of the outer tank body in a surrounding mode, and the second heat insulation member is arranged on the heat insulation layer.
In some embodiments, the outer tank further comprises an outer tank top disposed at the top of the outer tank body, and the top guard assembly further comprises a third insulation member connected to the first insulation member, the third insulation member being disposed circumferentially on an inner wall of the bottom of the outer tank top.
In some embodiments, the bottom guard assembly further comprises a spacer disposed between the inner tank and the insulation layer, and both ends of the spacer extend out of the inner tank and are connected to the second insulation on the same side.
In some embodiments, the second insulating member comprises a first insulating portion, a second insulating portion, and an insulating material, wherein the first insulating portion and the second insulating portion are disposed at an included angle, the first insulating portion is connected to the inner wall of the outer can body, the second insulating portion is connected to the insulating member, the first insulating portion, the second insulating portion, the inner wall of the outer can body, and the insulating layer together form an insulating chamber, and the insulating material is filled in the insulating chamber.
In some embodiments, the spacer, the first spacer, and the second spacer are metal pieces.
In some embodiments, the spacer has a thickness of 3 to 20mm, the first spacer has a thickness of 5 to 16mm, the second spacer has a thickness of 3 to 20mm, and the second spacer has a height of 0.3 to 10m.
In some embodiments, the separator, the first separator and the second separator are cloth-like composite materials composed of a metal film and a glass fiber cloth.
In some embodiments, the spacer has a thickness of 0.5 to 20mm, the first spacer has a thickness of 0.5 to 20mm, the second spacer has a thickness of 0.5 to 20mm, and the second spacer has a height of 0.3 to 10m.
In some embodiments, the insulating chamber has a width of 50mm to 250mm.
In some embodiments, the third thermal insulation member and the first thermal insulation member are polyurethane foam.
In some embodiments, the third thermal insulation member and the first thermal insulation member have a width of 0.5 to 4m and a thickness of 20 to 150mm.
The beneficial effects of the application are as follows:
according to the bimetal wall full-capacity type low-temperature storage tank, as the top protection component and the bottom protection component are arranged, the top protection component comprises the first heat insulation component, and the first heat insulation component is arranged on the inner wall of the top of the outer tank body in a surrounding mode, so that when the heat insulation material at the upper part of the annular gap heat insulation space is settled and the heat insulation effect is lost, the cold energy loss of the gaseous low-temperature medium in the annular gap heat insulation space can be reduced under the heat insulation effect of the first heat insulation component; the bottom protection component comprises a second heat insulation part, wherein the second heat insulation part is arranged on the inner wall of the bottom of the outer tank body in a surrounding mode, and the second heat insulation part is arranged on the heat insulation layer.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present utility model.
FIG. 1 is a schematic illustration of annular space adiabatic settling of a cryogenic storage tank;
FIG. 2 is a schematic illustration of non-destructive leakage conditions of an inner tank of a cryogenic storage tank;
FIG. 3 is a schematic diagram of the inner tank destructive leakage condition of the cryogenic storage tank;
fig. 4 is a schematic structural diagram of the cryogenic tank provided in this embodiment;
FIG. 5 is a schematic view of the top shield assembly of FIG. 4;
FIG. 6 is a schematic view of the bottom shield assembly of FIG. 4;
fig. 7 is a second schematic structural view of the bottom guard assembly of fig. 4.
Reference numerals illustrate:
1-first arrow, 2-second arrow, 3-third arrow, 4-fourth arrow, 100-outer tank, 110-outer tank body, 120-outer tank top, 130-insulation layer, 140-outer tank bottom plate, 150-annulus insulation space, 200-inner tank, 300-top shield assembly, 310-first insulation, 320-third insulation, 400-bottom shield assembly, 410-second insulation, 411-first insulation, 412-second insulation, 413-insulation, 420-insulation, 500-tank foundation.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-2, the dual metal wall full capacity type cryogenic storage tank includes an outer tank 100 and an inner tank 200, the outer tank 100 includes an outer tank main body 110, an outer tank top 120, a heat insulation layer 130 and an outer tank bottom plate 140, the outer tank top 120 is disposed at the top of the outer tank main body 110, the heat insulation layer 130 is disposed at the bottom of the outer tank main body 110, the outer tank bottom plate 140 is disposed below the heat insulation layer 130, the inner tank 200 is disposed in the outer tank main body 110 and is disposed on the heat insulation layer 130, an annular heat insulation space 150 is disposed in the outer tank 100, the annular heat insulation space 150 is filled with heat insulation material, wherein the inner tank 200 is used for containing liquid cryogenic medium, and the dome space above the liquid surface, the annular heat insulation space 150 and the heat insulation layer 130 are filled with gaseous cryogenic medium.
In the related art, under the normal operation condition, the outer surface of the outer tank main body 110 may generate icing phenomenon in the tank bottom area near the heat insulation layer 130 and the tank top area near the outer tank top 120, and the tank wall icing indicates that the cold insulation effect of the cold insulation system of the storage tank is poor, the cold energy loss is large, and the benefit is affected. The applicant found that the cause of the tank wall icing is as follows:
1. the reason why the tank wall top region of the outer tank body 110 is frozen is that loose insulation in the annular insulation space 150 is settled by gravity as the service time increases. As shown in fig. 1, a first arrow 1 in fig. 1 represents a flow direction of the heat insulating material, and in the annular heat insulating space 150, the heat insulating material in a partial area at the upper part is lost or loosened, the heat insulating effect is reduced, and the cooling capacity of the gaseous cryogenic medium in the area is lost, so that the temperature of the tank wall of the outer tank 100 is reduced, and water vapor in the air freezes after being cooled.
2. The ice formation in the tank wall bottom region of the outer tank main body 110 is caused by the non-destructive leakage of the inner tank 200. As shown in fig. 2, a second arrow 2 in fig. 2 represents a flow direction of the liquid cryogenic medium when the inner tank 200 is in a nondestructive leakage state, for example, when the storage tank is fed or the medium in the inner tank 200 splashes under earthquake shake, part of the liquid cryogenic medium enters the annular heat insulation space 150 and settles to the bottom of the annular heat insulation space 150, and the cold of the part of the liquid cryogenic medium is dissipated, so that the wall of the bottom tank is low in temperature, and water vapor in the air outside the storage tank freezes when the water vapor is cooled.
Based on this, in connection with fig. 4, embodiments of the present application provide a bi-metallic wall full capacity cryogenic storage tank comprising a top shield assembly 300 and a bottom shield assembly 400. The top shield assembly 300 is used to shield the top of the tank wall of the outer tank 100 and the bottom shield assembly 400 is used to shield the bottom of the tank wall of the outer tank 100. Specifically, the top protection assembly 300 includes a first heat insulating member 310, wherein the first heat insulating member 310 is made of a heat insulating material and has a heat insulating function, and the first heat insulating member 310 is circumferentially disposed on the inner wall of the top of the outer can body 110, so that when the heat insulating material at the upper portion of the annular heat insulating space 150 is settled and loses the heat insulating effect, the heat loss of the gaseous low temperature medium in the annular heat insulating space 150 can be reduced under the heat insulating effect of the first heat insulating member 310.
The bottom protection assembly 400 includes a second heat insulating member 410, the second heat insulating member 410 also has a heat insulating function, the second heat insulating member 410 is circumferentially disposed on the inner wall of the bottom of the outer can body 110, and the second heat insulating member 410 is disposed on the heat insulating layer 130, so that when the inner can 200 is subjected to non-destructive leakage, part of the liquid cryogenic medium can enter the annular heat insulating space 150 and settle to the bottom of the annular heat insulating space 150, and then the heat loss of the flowing liquid cryogenic medium can be reduced under the heat insulating effect of the second heat insulating member 410, thereby improving the benefit.
Further, as shown in fig. 3, the inner tank 200 of the bi-metal wall full-capacity cryogenic storage tank may also have destructive leakage, and at this time, a large amount of cryogenic liquid medium leaks into the annular adiabatic space 150, the temperature is reduced, and a large amount of cryogenic gaseous medium is generated to impact the top side wall of the outer tank main body 110 and the side wall of the outer tank top 120 upwards, and the top side wall of the outer tank main body 110 and the side wall of the outer tank top 120 are generally made of carbon steel materials, which have the risk of occurrence of cryogenic brittle failure under the continuous impact of cryogenic gas. Based on this, the top protection assembly 300 in this embodiment further includes a third heat insulating member 320, the third heat insulating member 320 being connected to the first heat insulating member 310, the third heat insulating member 320 being circumferentially disposed on the inner wall of the bottom of the outer can top 120, so that the first heat insulating member 310 and the third heat insulating member 320 can prevent the low temperature gas from directly contacting the top sidewall of the outer can body 110 and the sidewall of the outer can top 120, respectively, reducing the risk of occurrence of low temperature brittle failure.
Further, after the inner tank 200 is destructively leaked, a large amount of cryogenic liquid medium will be in contact with the tank wall of the outer tank main body 110 and the outer tank bottom plate 140, so that the temperature of the cryogenic liquid medium will be conducted to the tank foundation 500 through the tank wall of the outer tank main body 110 in the horizontal direction, and will be conducted to the tank foundation 500 through the outer tank bottom plate 140 in the vertical direction, and the cryogenic liquid medium will be rapidly conducted to the tank foundation 500 due to the thinner thickness of the outer tank bottom plate 140, and the third arrow 3 in fig. 3 represents the flow direction of the cryogenic liquid medium and the fourth arrow 4 represents the flow direction of the cryogenic gas when the inner tank 200 is destructively leaked. Namely, the temperature conduction path of the liquid cryogenic medium in the vertical direction is as follows: the liquid low-temperature medium- & gt the outer tank bottom plate 140- & gt the storage tank foundation 500, wherein the temperature conduction path in the horizontal direction is as follows: liquid cryogenic medium→the tank wall of the outer tank body 110→the tank foundation 500. Typically, the tank foundation 500 is made of reinforced concrete, and when the medium temperature is low, e.g., below-40 ℃, the concrete is at risk of cracking, thereby reducing the load-bearing capacity of the tank foundation 500, resulting in damage to the tank foundation 500.
In addition, in actual engineering, the outer tank bottom plate 140 is made of a plurality of small-sized steel plates by lap welding, corrosion is likely to occur in the atmosphere, and when the outer tank bottom plate 140 is broken by penetration due to corrosion, gas leakage occurs between the outer tank bottom plate 140 and the tank foundation 500.
Therefore, in connection with fig. 4, the bottom protection assembly 400 further includes a spacer 420, where the spacer 420 is disposed between the inner tank 200 and the heat insulation layer 130, and two ends of the spacer 420 extend out of the inner tank 200 and are connected to the second heat insulation member 410 on the same side, so that the spacer 420 and the second heat insulation member 410 together form a single insulating layer, which can isolate the liquid cryogenic medium and the gaseous cryogenic medium above the heat insulation layer 130 to a certain extent, and the liquid cryogenic medium will not directly contact the bottom plate 140 of the outer tank even if the inner tank 200 of the cryogenic storage tank is destructively leaked. Thus, the temperature conduction path of the liquid cryogenic medium in the vertical direction is: the liquid cryogenic medium- & gt the separator 420- & gt the heat insulation layer 130- & gt the outer tank bottom plate 140- & gt the tank foundation 500, and the temperature conduction path in the horizontal direction is as follows: the length of the temperature conduction path of the liquid cryogenic medium is increased in this embodiment, and the influence of the cryogenic medium on the tank foundation 500 is greatly reduced under the adiabatic effect of the second adiabatic member 410, because of the liquid cryogenic medium- & gt the second adiabatic member 410- & gt the tank wall of the outer tank 100- & gt the tank foundation 500.
Of course, since the insulating layer 130 is free of a gaseous medium, even if the outer can bottom plate 140 is corroded, no gas leakage occurs.
As described above, the insulating member 420 and the second insulating member 410 may together form an insulating layer, the second insulating member 410 may have an insulating function and also may have air tightness and liquid tightness, specifically, the second insulating member 410 includes a first insulating portion 411, a second insulating portion 412 and an insulating material 413, the first insulating portion 411 and the second insulating portion 412 have air tightness and liquid tightness, the first insulating portion 411 and the second insulating portion 412 are disposed at an angle, and in this embodiment, the first insulating portion 411 and the second insulating portion 412 may be disposed horizontally and vertically, respectively, and the first insulating portion 411 is connected to the inner wall of the outer can body 110, the second insulating portion 412 is connected to the insulating member 420, the first insulating portion 411, the second insulating portion 412, the inner wall of the outer can body 110 and the insulating layer 130 together form an insulating chamber, and the insulating material 413 is filled in the insulating chamber. That is, the heat insulating material 413 provided in the heat insulating chamber can exhibit heat insulating properties, and the first and second isolation portions 411 and 412 serve to isolate a medium.
The following description describes the steps of the design process of the top shield assembly 300 and the bottom shield assembly 400 in the embodiments of the present application:
1) Top guard assembly 300
(1) Process calculation
The temperature of the low-temperature boil-off gas generated when the leakage of the inner tank 200 occurs is determined through process calculation.
(2) Material selection
The heat insulating material 413 capable of bearing the low temperature of the medium is selected, and is mounted on the inner wall surfaces of the outer tank main body 110 and the outer tank top 120 in a pasting and spraying mode, and polyurethane foam is selected as the third heat insulating member 320 and the first heat insulating member 310.
(3) Adiabatic design
Referring to fig. 5, the top shield assembly 300 is sized by temperature field analysis, including the width L of the third thermal insulation 320 1 Thickness delta 1 Width L of first insulating member 310 2 Thickness delta 2 . The adiabatic design should ensure that the material of the protected component is not below its allowable low temperature limit under any operating conditions. In particular to the present embodiment, L 1 And L 2 Are all 0.5-4 m, delta 1 And delta 2 The thickness of the steel is 20-150 mm.
(4) Manufacturing and installing
The polyurethane foam can be foamed in situ, adhered to the surface of the tank wall in a spraying mode, prefabricated in a factory and adhered (mechanically connected) to the inner surfaces of the tank wall and the tank top in situ.
1) Bottom guard assembly 400
<1> when the bottom guard assembly 400 is made of a metal material, in connection with fig. 6, it can be achieved by the following steps:
(1) material selection
The spacer 420, the second spacer 412, and the first spacer 411 of the bottom guard assembly 400 are made of a metal material capable of withstanding the low temperature of the medium, and are generally made of the same material as the inner can 200. The insulation 413 of the bottom guard assembly 400 may be a foam glass brick or a polyurethane foam.
(2) Adiabatic design
The primary purpose of the insulation design is to determine the height L of the second spacer 412 3 And thickness delta of the insulating chamber 3 . The temperature field of the tank bottom region of the outer tank 100 with the bottom guard assembly 400 can be analyzed by finite element calculations, requiring that the temperature of the tank base 500 be no lower than its allowable limit low temperature under any operating conditions. In particular to the present embodiment, L 3 0.3 to 10m, delta 3 50mm to 250mm.
(3) Structural design
The bottom guard assembly 400 should be able to withstand the pressure loading of the insulation 413 of the annular insulating space 150, the hydrostatic loading of the leaked medium of the inner tank 200, the cryogenic loading of the medium, and the seismic loading. Under the above load, the bottom protection assembly 400 generates larger mechanical stress and thermal stress, and the first isolation portion 411, the second isolation portion 412 and the isolation member 420 have structural dimensions that can adapt to the load under various working conditions, and no failure occurs under any working condition. Specifically, in the present embodiment, the thickness of the spacer 420 may be 3 to 20mm, the thickness of the first spacer 411 may be 5 to 16mm, and the thickness of the second spacer 412 may be 3 to 20mm. The stress of each part can be calculated by a finite element method, and the stress is ensured not to be larger than an allowable stress value. When the strength requirement cannot be met, the structural dimensions of the components can be adjusted. The thermal insulation 413 of the bottom shield assembly 400 is not damaged under the load.
(4) Manufacturing and installing
The first barrier 411, the second barrier 412 and the barrier 420 of the bottom guard assembly 400 are splice welded from steel plates; the first isolation part 411 and the second isolation part 412 are welded and fixed.
The first isolation part 411 is circumferentially arranged along the inner wall of the outer can body 110, is welded by a plurality of arc plates through butt welding joints, and the first isolation part 411 is welded with the inner wall of the outer can body 110.
The second isolation part 412 has a cylindrical structure as a whole, and is welded by a plurality of rectangular steel plates through butt welding joints, the upper end of the second isolation part 412 is welded with the lower surface of the first isolation part 411, and the lower end of the second isolation part 412 is welded with the upper surface of the isolation member 420.
The spacer 420 is entirely of a circular flat plate structure and is welded from a plurality of steel plates by butt or lap welding joints.
After installation, all of the welded joints of the bottom shield assembly 400 are inspected and tested as necessary to ensure the gas and liquid tightness of the structure as a whole.
The heat insulating material 413 may be adhered to the inner wall of the outer can body 110 by an adhesive, or sprayed on the inner wall of the outer can body 110 using polyurethane foam.
<2> when the bottom shield assembly 400 is made of a non-metallic material, in connection with fig. 7, it can be achieved by the following steps:
(1) material selection
The separator 420, the first separator 411, and the second separator 412 are made of a nonmetallic material capable of withstanding the low temperature of the medium, and may be made of a cloth-like composite material (hereinafter referred to as "composite film") composed of a metallic thin film and a glass fiber cloth having air tightness and liquid tightness. Under the low temperature effect of the liquid medium, the material has various performances which are not degraded within the service life of the storage tank design. The heat insulating material 413 is a foam glass block or a polyurethane foam.
(2) Adiabatic design
The primary purpose of the insulation design is to determine the height L of the second partition 412 of the bottom shield assembly 400 3 And width delta of adiabatic chamber 3 . The temperature field of the tank bottom region with the bottom guard assembly 400 can be analyzed by finite element calculations, requiring that the temperature of the tank foundation 500 be no lower than its allowable limit low temperature under any operating conditions. In particular to the present embodiment, L 3 0.3 to 10m, delta 3 50mm to 250mm.
(3) Structural design
The bottom guard assembly 400 should be able to withstand the pressure loading of the insulation 413 of the annular insulating space 150, the hydrostatic loading of the leaked medium of the inner tank 200, the cryogenic loading of the medium, and the seismic loading. The composite membrane of the bottom protection assembly 400 generates a larger tensile stress under the load, and the first isolation portion 411, the second isolation portion 412 and the isolation member 420 have structural dimensions that can adapt to the load under various working conditions, and do not generate rupture failure under any working condition. In particular, in the present embodiment, the thickness of the spacer 420 may be 0.5 to 20mm, the thickness of the first spacer 411 may be 0.5 to 20mm, and the thickness of the second spacer 412 may be 0.5 to 20mm, and the heat insulating material 413 of the bottom shielding assembly 400 is not damaged under the above load.
(4) Manufacturing and installing
The first isolation part 411, the second isolation part 412 and the isolation part 420 of the bottom protection component 400 are formed by splicing a plurality of composite films, and the spliced joints among the composite films are stuck and connected by adopting a low-temperature-resistant adhesive. The first isolation part 411 and the second isolation part 412 and the isolation piece 420 are adhered and connected by adopting a low-temperature-resistant adhesive, and the first isolation part 411 and the second isolation part 412 are adhered and connected by adopting a low-temperature-resistant adhesive.
After installation, the bottom shield assembly 400 is inspected and tested as necessary to ensure the overall gas and liquid tightness of the structure.
The heat insulating material 413 is made of foam glass brick, and is adhered to the wall of the outer tank 100 by using an adhesive, or is sprayed on the inner wall surface of the tank wall by using polyurethane foam.
The application has the following main beneficial effects:
1. the storage tank provided with the top protection assembly 300 can avoid remarkable cold energy loss and icing outside the tank wall due to the reduction of the heat insulation performance of the upper region of the tank wall of the outer tank main body 110 after the heat insulation material 413 of the annular heat insulation space 150 is settled;
2. the storage tank provided with the top protection assembly 300 can avoid the occurrence of low-temperature brittle failure of the non-low-temperature-resistant materials of the upper part of the tank wall of the outer tank main body 110 and the outer tank top 120 under the condition of a large amount of leakage of the inner tank 200;
3. the storage tank provided with the bottom protection assembly 400 has a collection function on the low-temperature liquid medium leaked to the annular gap heat insulation space 150 under the non-destructive leakage working condition of the inner tank 200, so that the low-temperature liquid medium is prevented from directly contacting the tank wall at the bottom of the outer tank main body 110, and the outer wall is prevented from icing;
4. the storage tank provided with the bottom protection assembly 400 can isolate liquid and gaseous media in the space above the bottom plate of the bottom protection assembly 400 under normal operation working conditions and leakage working conditions, so that the risk of leakage of the media through the bottom plate 140 of the outer tank is reduced;
5. the storage tank provided with the bottom protection assembly 400 can effectively protect the storage tank foundation 500 from low temperature under the destructive leakage working condition of the inner tank 200, and the risk of low temperature damage to the storage tank foundation 500 is reduced. By sizing the bottom shield assembly 400, it is ensured that the tank foundation 500 remains above a sustainable threshold low temperature without damage under conditions where the inner tank 200 is completely leaking.
While preferred embodiments of the present utility model have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the utility model.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present utility model without departing from the spirit or scope of the utility model. Thus, it is intended that the present utility model also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (11)
1. A bi-metallic wall full capacity cryogenic tank comprising:
the outer tank comprises an outer tank main body and a heat insulation layer, and the heat insulation layer is arranged at the bottom of the outer tank main body;
an inner tank disposed in the outer tank main body and on the heat insulating layer;
a top shield assembly including a first heat insulating member circumferentially disposed on an inner wall of the top of the outer can body;
the bottom protection assembly comprises a second heat insulation member which is arranged on the inner wall of the bottom of the outer tank body in a surrounding mode, and the second heat insulation member is arranged on the heat insulation layer.
2. The double-metal wall full capacity cryogenic storage tank of claim 1, wherein the outer tank further comprises an outer tank top disposed on top of the outer tank body, and the top guard assembly further comprises a third insulation member coupled to the first insulation member, the third insulation member being disposed circumferentially on an inner wall of the bottom of the outer tank top.
3. The double-metal wall full capacity cryogenic storage tank of claim 1, wherein the bottom shield assembly further comprises a spacer disposed between the inner tank and the insulation layer, and wherein both ends of the spacer extend out of the inner tank and are connected to the second insulation on the same side.
4. The double-metal wall full-capacity cryogenic storage tank of claim 3, wherein the second thermal insulation member comprises a first isolation portion, a second isolation portion and a thermal insulation material, wherein the first isolation portion is arranged at an included angle with the second isolation portion, the first isolation portion is connected with the inner wall of the outer tank body, the second isolation portion is connected with the isolation member, the first isolation portion, the second isolation portion, the inner wall of the outer tank body and the thermal insulation layer together form a thermal insulation chamber, and the thermal insulation material is filled in the thermal insulation chamber.
5. The double-metal wall full capacity cryogenic storage tank of claim 4, wherein the separator, the first separator and the second separator are metal pieces.
6. The double-metal wall full-capacity cryogenic storage tank of claim 5, wherein the thickness of the separator is 3-20 mm, the thickness of the first separator is 5-16 mm, the thickness of the second separator is 3-20 mm, and the height of the second separator is 0.3-10 m.
7. The double-metal wall full-capacity cryogenic storage tank of claim 4, wherein the separator, the first separator and the second separator are cloth-like composite materials composed of metal films and glass fiber cloth.
8. The double-metal wall full-capacity cryogenic tank of claim 7, wherein the thickness of the separator is 0.5-20 mm, the thickness of the first separator is 0.5-20 mm, the thickness of the second separator is 0.5-20 mm, and the height of the second separator is 0.3-10 m.
9. The double-metal wall full capacity cryogenic tank of claim 6 or 8, wherein the insulating chamber has a width of 50mm to 250mm.
10. The double-metal wall full capacity cryogenic storage tank of claim 1, wherein the first and third thermal insulation members are polyurethane foam.
11. The double-metal wall full capacity cryogenic storage tank of claim 10, wherein the first and third thermal insulation members have a width of 0.5 to 4m and a thickness of 20 to 150mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223491469.9U CN219102685U (en) | 2022-12-27 | 2022-12-27 | Double-metal-wall full-capacity type low-temperature storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223491469.9U CN219102685U (en) | 2022-12-27 | 2022-12-27 | Double-metal-wall full-capacity type low-temperature storage tank |
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| Publication Number | Publication Date |
|---|---|
| CN219102685U true CN219102685U (en) | 2023-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223491469.9U Active CN219102685U (en) | 2022-12-27 | 2022-12-27 | Double-metal-wall full-capacity type low-temperature storage tank |
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| CN (1) | CN219102685U (en) |
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2022
- 2022-12-27 CN CN202223491469.9U patent/CN219102685U/en active Active
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