Cold insulation structure and low-temperature full-capacity tank

Abstract

The utility model relates to the technical field, in particular to a cold insulation structure and a low-temperature full-capacity tank. The cold insulation structure comprises a ring beam, a first load distribution layer, a first heat insulation layer, a cold insulation layer, a second load distribution layer, a second heat insulation layer and a foundation platform, the ring beam is arranged at the bottom of the inner tank; the first load distribution layer is located in the ring beam and used for being arranged at the bottom of the inner tank. The first heat insulation layer comprises a first part and a second part, the first part is located in the ring beam and connected with the load distribution layer, and the second part is connected with the bottom of the ring beam; the cold insulation layer is positioned below the first heat insulation layer and is connected with the first heat insulation layer; the second load distribution layer is arranged at the bottom of the outer tank; the second heat insulation layer is positioned below the second load distribution layer and is connected with the second load distribution layer; the foundation platform is located below the second heat insulation layer and connected with the second heat insulation layer. The deformation and damage probability of the heat insulation layer and the cold insulation layer can be effectively reduced, and therefore the freezing probability of the foundation platform is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field, and in particular to a cold-keeping structure and a low-temperature full containment tank. BACKGROUND

[0002] The low-temperature full containment tank is a device for storing liquid substances under low-temperature and normal-pressure conditions, which has significant safety and economic advantages. Its main features include: normal-pressure design to avoid the risk of high-pressure tank leakage, double-layer structure and high-efficiency insulation materials to reduce evaporation rate and ensure storage safety; relatively low construction cost, convenient maintenance, and less consumption of manpower and resources, suitable for large-scale liquid storage needs. It plays an important role in the field of low-temperature liquid storage such as liquefied natural gas (LNG), liquid oxygen, liquid nitrogen, and low-temperature products, and is indispensable in the energy, chemical, and medical industries. With the growing global demand for clean energy, the market demand for low-temperature full containment tanks continues to expand.

[0003] However, after the low-temperature full containment tank leaks, the low-temperature liquid or gas may cause the following effects on the foundation due to heat transfer to the foundation structure: the leakage of low-temperature liquid or gas may cause the foundation concrete to freeze, resulting in frost heaving or frost cracking, affecting the stability of the foundation; under low-temperature working conditions, the foundation may be damaged by cracking due to icing and frosting, making repair difficult; after being exposed to low-temperature impact, the mechanical strength of the foundation pile cap may change significantly, posing a safety hazard; if the foundation needs to be maintained, due to the low-temperature environment and the complexity of the structure, the repair difficulty and cost are high.

[0004] A cold-keeping structure for a full containment tank is disclosed in Chinese Utility Model Patent No. CN116105062A, which sets up a cold-keeping structure between the inner tank and the outer tank, and a heat insulation structure between the outer tank and the foundation pile cap, to prevent the cold from being transferred to the foundation pile cap and causing the foundation pile cap to freeze. However, in this patent, the inner tank bottom and the outer tank are directly connected by the cold-keeping layer, and when stress concentration occurs at the inner tank bottom, the cold-keeping layer is easily affected and may deform or be damaged, which will affect the cold-keeping effect of the cold-keeping layer, and the heat insulation structure at the bottom of the outer tank may also be affected and may deform or be damaged, thereby causing the foundation pile cap to freeze. SUMMARY

[0005] The present application aims to provide a cold-keeping structure and a low-temperature full containment tank, by setting up a load distribution layer at the bottom of the inner tank and the outer tank, so that the load of the inner tank can be evenly distributed to the cold-keeping structure of the inner tank, and the load of the low-temperature full containment tank as a whole can be evenly distributed to the heat insulation structure of the outer tank, thereby avoiding stress concentration in the cold-keeping structure and the heat insulation structure, which may cause deformation and damage, and further solving the problem of freezing of the foundation pile cap caused by deformation and damage of the cold-keeping structure and the heat insulation structure in the prior art.

[0006] This application is achieved through the following technical solution:

[0007] In a first aspect, this application provides a cold-insulating structure for a cryogenic full-containment tank, wherein the cryogenic full-containment tank includes an outer tank and an inner tank located inside the outer tank, and a gap exists between the inner tank and the outer tank, including:

[0008] A ring beam, which is used to be installed at the bottom of the inner tank;

[0009] The first load distribution layer is located inside the ring beam and is disposed on the bottom side of the inner tank.

[0010] The first insulation layer includes a first part and a second part. The first part is located inside the ring beam and is in contact with the load distribution layer, and the second part is in contact with the bottom of the ring beam.

[0011] A cold insulation layer, which is located below the first heat insulation layer and is in contact with the first heat insulation layer;

[0012] The second load distribution layer is used to be installed at the bottom of the outer tank.

[0013] A second insulation layer is located below and in contact with the second load distribution layer;

[0014] A foundation support, which is located below and in contact with the second insulation layer.

[0015] The cold insulation structure provided in this application, by setting a ring beam at the bottom of the inner tank and setting a first load distribution layer within the ring beam, can evenly distribute the load of the inner tank onto the first insulation layer, and then evenly distribute it onto the cold insulation layer. This effectively reduces the probability of stress concentration in the first insulation layer and the cold insulation layer. Specifically, the first insulation layer between the cold insulation layer and the bottom of the inner tank can effectively reduce heat exchange between the inner tank and the outside, effectively prevent internal heat loss and external heat entry, and provide a relatively stable temperature environment for the cold insulation layer, ensuring that the cold insulation layer can perform its continuous and effective cold insulation function. The setting of the second load distribution layer can evenly distribute the overall load of the low-temperature full-containment tank onto the second insulation layer, thereby reducing the probability of stress concentration in the second insulation layer, and thus ensuring that the second insulation layer can perform its continuous and stable insulation effect, thereby effectively preventing the foundation platform from freezing.

[0016] In some alternative embodiments, the first load-distribution layer is configured as a reinforced concrete layer or a plain concrete layer.

[0017] In some alternative embodiments, the second load-distribution layer is configured as a reinforced concrete mesh layer.

[0018] In some optional embodiments, a moisture-proof layer is further arranged between the second heat insulation layer and the foundation slab.

[0019] In some optional embodiments, the first part and the second part are configured in a hierarchical stacked structure, and a moisture-proof layer is arranged between the first part and the second part.

[0020] In some optional embodiments, the first part comprises a plurality of first unit plates spliced with each other, and the second part comprises a plurality of second unit plates spliced with each other, wherein the first part and the second part are arranged in a staggered manner.

[0021] In some optional embodiments, the first unit plates and the second unit plates are both configured as foam glass brick plates or pressure-bearing wood plates.

[0022] In some optional embodiments, the thickness of the first load distribution layer is configured as 75-150 mm.

[0023] In some optional embodiments, a waterproof elastic sealing protective layer is further included, the waterproof elastic sealing protective layer is configured in a ring belt structure, the radially outer side of the waterproof elastic sealing protective layer is connected with the foundation slab, and the radially inner side of the waterproof elastic sealing protective layer is connected with the outer tank bottom edge plate.

[0024] In a second aspect, the application provides a low-temperature full-capacity tank comprising any one of the cold insulation structures according to the first aspect.

[0025] Compared with the prior art, the application has the following advantages and beneficial effects:

[0026] The cold insulation structure and the low-temperature full-capacity tank provided by the application can uniformly distribute the load of the inner tank to the first heat insulation layer, and then to the cold insulation layer, thereby effectively reducing the probability of stress concentration of the first heat insulation layer and the cold insulation layer, wherein the first heat insulation layer between the cold insulation layer and the inner tank bottom can effectively reduce the heat exchange between the inner tank and the outside, effectively prevent the internal heat loss and the external heat from entering, and provide a relatively stable temperature environment for the cold insulation layer, so as to ensure that the cold insulation layer can continuously and effectively play the cold insulation function; and the second load distribution layer can uniformly distribute the load of the low-temperature full-capacity tank to the second heat insulation layer, thereby reducing the probability of stress concentration of the second heat insulation layer, and ensuring that the second heat insulation layer can continuously and stably play the heat insulation effect, thereby effectively preventing the foundation slab from freezing. BRIEF DESCRIPTION OF DRAWINGS

[0027] The drawings described herein are intended to provide further understanding of the embodiments of the present application, form a part of the present application, and do not constitute a limitation of the embodiments of the present application. In the drawings:

[0028] Figure 1 A low-temperature full containment tank profile structure schematic diagram provided by the embodiments of the present application.

[0029] Markings in the drawings and corresponding component names:

[0030] 1- inner tank wall, 2- inner tank bottom, 3- outer tank wall, 4- outer tank bottom, 5- first load distribution layer, 6- ring beam, 7- first heat insulation layer, 8- waterproof elastic sealing protection layer, 9- moisture-proof layer, 10- foundation pile cap, 11- second load distribution layer, 12- second heat insulation layer. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application more clear and obvious, the present application will be further described in detail below in combination with embodiments and drawings, the illustrative embodiments of the present application and the description thereof are only used to explain the present application, and do not constitute a limitation of the present application.

[0032] As shown in Figure 1 The first aspect, the embodiments of the present application provide a cold insulation structure for a low-temperature full containment tank, wherein the low-temperature full containment tank comprises an outer tank and an inner tank located in the outer tank, and there is a gap between the inner tank and the outer tank, i.e. an annular cavity is formed between the inner tank wall 1 and the outer tank wall 3, the cold insulation structure comprises a ring beam 6, a first load distribution layer 5, a first heat insulation layer, a cold insulation layer, a second load distribution layer 11, a second heat insulation layer 12 and a foundation pile cap 10; the ring beam 6 is arranged on the inner tank bottom 2; the first load distribution layer 5 is located on the inner side of the ring beam 6 and arranged on the lower side of the inner tank bottom 2; the first heat insulation layer comprises a first part and a second part, the first part is located on the inner side of the ring beam 6 and connected with the load distribution layer, and the second part is connected with the bottom of the ring beam 6; the cold insulation layer is located below the first heat insulation layer and connected with the first heat insulation layer; the second load distribution layer 11 is arranged on the outer tank bottom 4; the second heat insulation layer 12 is located below the second load distribution layer 11 and connected with the second load distribution layer 11; the foundation pile cap 10 is located below the second heat insulation layer 12 and connected with the second heat insulation layer 12.

[0033] During construction, a bottom-up construction sequence is adopted, i.e., the construction of the foundation slab 10 is performed first, the second heat insulation layer 12 and the second load distribution layer 11 are sequentially constructed on the foundation slab 10, the outer tank is installed on the second load distribution layer 11, the cold insulation layer, the first heat insulation layer 7, the ring beam 6 and the first load distribution layer 5 are sequentially constructed on the tank bottom in the outer tank from bottom to top, and finally the inner tank is installed on the first load distribution layer 5. For the construction of the first heat insulation layer 7, the second part can be constructed first, then the ring beam 6 is constructed on the second part, and after the ring beam 6 is formed, the first part of the first heat insulation layer 7 and the first load distribution layer 5 are sequentially constructed inside the ring beam 6.

[0034] The cold insulation structure provided by the embodiments of the present application can uniformly distribute the load of the inner tank to the first heat insulation layer 7, and then to the cold insulation layer, thereby effectively reducing the probability of stress concentration of the first heat insulation layer 7 and the cold insulation layer, wherein the first heat insulation layer 7 between the cold insulation layer and the bottom of the inner tank can effectively reduce the heat exchange between the inner tank and the outside, effectively prevent the internal heat loss and the external heat from entering, and provide a relatively stable temperature environment for the cold insulation layer, so as to ensure that the cold insulation layer can continuously and effectively play a cold insulation function; and the second load distribution layer 11 can uniformly distribute the load of the low-temperature full-content tank to the second heat insulation layer 12, thereby reducing the probability of stress concentration of the second heat insulation layer 12, and ensuring that the second heat insulation layer 12 can continuously and stably play a heat insulation effect, thereby effectively avoiding the freezing of the foundation slab 10.

[0035] In the embodiments of the present application, the overall shape of the foundation slab 10 can be a cylindrical structure to adapt to the shape of the outer tank, the overall shape of the ring beam 6 can be a circular ring structure to adapt to the shape of the inner tank, and correspondingly, the first load distribution layer 5, the cold insulation layer, the second load distribution layer 11 and the second heat insulation layer 12 are all provided in a cylindrical structure, and the first heat insulation layer 7 is provided in a structure in which two cylindrical structures are coaxially connected.

[0036] In the embodiments of the present application, the ring beam 6 can be designed as a perlite material ring, and during construction, block stacking is adopted to facilitate prefabrication and construction.

[0037] In some optional embodiments, the first load distribution layer 5 is configured as a reinforced concrete layer or a plain concrete layer.

[0038] In the embodiments of the present application, the reinforced concrete layer has high compressive strength and good crack resistance, can effectively uniformly disperse the pressure at the bottom of the inner tank to the first heat insulation layer and cold preservation layer below, prevent the deformation or damage of the heat insulation and cold preservation materials due to excessive local pressure, enhance the overall stability of the structure, improve the load bearing capacity of the bottom structure, and ensure the safety and reliability of the tank during long-term use. Meanwhile, the reinforced concrete layer has good rigidity and can resist certain mechanical vibration and impact, further protecting the integrity of the first heat insulation layer and cold preservation layer.

[0039] In some optional embodiments, the second load distribution layer 11 is configured as a reinforced concrete layer.

[0040] In the embodiments of the present application, the second load distribution layer 11 is also designed as a reinforced concrete layer, which can effectively uniformly disperse the pressure of the full containment tank to the second heat insulation layer below, prevent the deformation or damage of the heat insulation material due to excessive local pressure, enhance the overall stability of the structure, improve the load bearing capacity of the bottom structure, and ensure the safety and reliability of the tank during long-term use.

[0041] In some optional embodiments, a moisture-proof layer 9 is further arranged between the second heat insulation layer 12 and the foundation slab 10. In actual implementation, the moisture-proof layer 9 can adopt cold primer and SBS moisture-proof asphalt felt.

[0042] In the embodiments of the present application, the moisture-proof layer 9 can prevent the moisture absorption of the heat insulation material of the second heat insulation layer 12, avoid the decline of the heat insulation performance, and the cooperation of the second heat insulation layer 12 and the moisture-proof layer 9 not only optimizes the heat insulation performance of the full containment tank, but also makes the performance of the full containment tank more reliable and stable in different working conditions.

[0043] In some optional embodiments, the first part and the second part are configured in a hierarchical stacking structure, and the moisture-proof layer 9 is arranged between the first part and the second part.

[0044] In the embodiments of the present application, the design of the first heat insulation layer 7 and the moisture-proof layer 9 further optimizes the heat insulation performance of the full containment tank, can effectively reduce the heat conduction of cold energy, reduce the "cold bridge" phenomenon, and further improve the reliability and stability of the performance of the full containment tank in different working conditions.

[0045] In some optional embodiments, the first part includes a plurality of first unit plates spliced with each other, and the second part includes a plurality of second unit plates spliced with each other, wherein the first part and the second part are arranged in a staggered manner.

[0046] In actual implementation, the first unit plate and the second unit plate are both configured as foam glass brick plates or pressure-bearing wood plates.

[0047] In the embodiments of the present application, the foam glass brick or the pressure-bearing wood block has excellent thermal insulation performance, low thermal conductivity, can effectively prevent heat transfer, reduce the entry of external heat into the inner tank, reduce the gasification amount of the low-temperature product, maintain the low-temperature storage state of the low-temperature product, meet the high requirements of the full containment tank on the thermal insulation performance, and also has a certain compressive strength, can buffer the influence of the inner tank pressure change and external vibration on the tank structure during the operation of the full containment tank, and assist in maintaining the stability of the overall structure of the full containment tank.

[0048] In some optional embodiments, the thickness of the first load distribution layer 5 is configured to be 75-150 mm.

[0049] In the embodiments of the present application, the first load distribution plate with sufficient thickness can optimize the stress of the first thermal insulation layer 7, and in actual implementation, the thickness of the first load distribution layer 5 can be designed to be 100 mm.

[0050] In some optional embodiments, a waterproof elastic sealing protection layer 8 is further included, the waterproof elastic sealing protection layer 8 is in a ring belt structure, the radially outer side of the waterproof elastic sealing protection layer 8 is connected with the foundation pile cap 10, and the radially inner side of the waterproof elastic sealing protection layer 8 is connected with the edge plate of the outer tank bottom 4.

[0051] In the embodiments of the present application, the waterproof elastic sealing protection layer 8 avoids the erosion of the second thermal insulation layer 12 by external rainwater and the like during the use of the full containment tank, thereby affecting the thermal insulation performance thereof, and the two cooperate with each other, not only optimizing the thermal insulation performance of the full containment tank, but also making the performance of the full containment tank more reliable and stable when coping with different working conditions.

[0052] In a second aspect, the present application provides a low-temperature full containment tank comprising any one of the cold insulation structures of the first aspect.

[0053] The above describes the embodiments of the present application by specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the description. Although the description of the present application is introduced in combination with some embodiments, this does not mean that the features of the present application are limited to the embodiments. On the contrary, the purpose of introducing the present application in combination with the embodiments is to cover other options or modifications that can be extended based on the claims of the present application. In order to provide a deep understanding of the present application, many specific details are included in the above description. The present application can also be implemented without using these details. In addition, in order to avoid confusion or obscure the focus of the present application, some specific details are omitted in the description. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0054] It should be noted that in the description of the application, similar reference numerals and letters in different drawings represent similar items, therefore, once an item is defined in one drawing, it is not necessary to further define and explain it in the subsequent drawings. In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A cold insulation structure for a full containment tank at low temperature, wherein, The low-temperature full containment tank comprises an outer tank and an inner tank located in the outer tank, and has a gap between the inner tank and the outer tank, characterized in that it comprises: a ring beam (6) arranged on the inner tank bottom (2); a first load distribution layer (5) arranged on the inner side of the ring beam (6) and on the lower side of the inner tank bottom (2); a first heat insulation layer comprising a first part and a second part, the first part being arranged on the inner side of the ring beam (6) and connected with the load distribution layer, and the second part being connected with the bottom of the ring beam (6); a cold insulation layer arranged below the first heat insulation layer and connected with the first heat insulation layer; a second load distribution layer (11) arranged on the outer tank bottom (4); a second heat insulation layer (12) arranged below the second load distribution layer (11) and connected with the second load distribution layer (11); a foundation slab (10) arranged below the second heat insulation layer (12) and connected with the second heat insulation layer (12).

2. The cold storage structure according to claim 1, characterized by The first load distribution layer (5) is configured as a reinforced concrete layer or a plain concrete layer.

3. The cold storage structure according to claim 1 or 2, characterized by The second load distribution layer (11) is configured as a reinforced concrete layer.

4. The cold storage structure according to claim 1, characterized by A moisture-proof layer (9) is further arranged between the second heat insulation layer (12) and the foundation slab (10).

5. The cold storage structure according to claim 1, characterized by The first part and the second part are configured in a hierarchical stacking structure, and a moisture-proof layer (9) is arranged between the first part and the second part.

6. The cold storage structure according to claim 5, characterized by The first part comprises a plurality of first unit plates spliced with each other, and the second part comprises a plurality of second unit plates spliced with each other, wherein the first part and the second part are arranged in a staggered manner.

7. The cold storage structure according to claim 6, characterized by The first unit plates and the second unit plates are configured as foam glass brick plates or pressure-bearing wood plates.

8. The cold storage structure according to claim 1, characterized by The thickness of the first load distribution layer (5) is configured as 75-150 mm.

9. The cold storage structure according to claim 1, characterized by A waterproof elastic sealing protective layer (8) is further included, which is configured in a ring belt structure, the radial outer side of the waterproof elastic sealing protective layer (8) is connected with the foundation slab (10), and the radial inner side of the waterproof elastic sealing protective layer (8) is connected with the edge plate of the outer tank bottom (4).

10. A cryogenic full containment tank characterized by, The cold insulation structure comprises the cold insulation structure according to any one of claims 1-9.

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