CN217736909U - Storage container - Google Patents

Abstract

The utility model discloses a storage container, it includes shell, inner container, first heat insulation layer and cold shield, forms the cavity between shell and the inner container, and first heat insulation layer and cold shield are installed in the cavity, and first heat insulation layer covers the surface of inner container for the inside that the heat of separation external world got into the inner container, and the cold volume of the inside of separation inner container is lost too; the cold screen is connected with the inner container, so that an inner circulation channel is formed between the cold screen and the inner container, low-temperature liquid in the inner container enters the medium channel of the cold screen and then exchanges heat with the first heat insulation layer, the first heat insulation layer is in a low-temperature state, and when the heat insulation layer is at a low temperature, the heat conductivity of the heat insulation layer is reduced, so that the heat radiation can be reduced, further, the heat radiation quantity of the storage container is reduced, the heat insulation performance of the storage container is improved, the static evaporation rate of the storage container is reduced, and the static evaporation rate of the storage container meets the requirement.

Description

Storage container

Technical Field

The utility model relates to a warehousing and transportation equipment field mainly relates to a storage container.

Background

When stored in a storage container, gases such as liquid oxygen, liquid nitrogen, liquid argon, liquefied natural gas, etc. exist in liquid form, and the temperature thereof is below-160 ℃. The storage containers for storing liquid oxygen, liquid nitrogen, liquid argon, liquefied natural gas and the like have high requirements on static evaporation rate, but the existing storage containers have low heat insulation performance, and the static evaporation rate of the existing storage containers cannot meet the requirements of cryogenic liquid storage tanks.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the present invention provides a storage container capable of reducing the static evaporation rate to improve the heat insulation performance of the storage container.

In order to achieve the purpose, the utility model adopts the following technical proposal:

a storage container, comprising: an inner container for storing a liquid; the outer shell is provided with a cavity, the inner container is arranged in the cavity, and a cavity is formed between the outer wall surface of the inner container and the inner wall surface of the outer shell; the first heat insulation layer is arranged in the cavity and surrounds the outer side of the inner container; the cold screen is arranged between the first heat insulation layer and the outer surface of the inner container, the cold screen is provided with a medium channel, two ends of the medium channel are communicated with the inner container, distance difference exists between two ends of the medium channel in the gravity direction, and heat can be transferred between the cold screen and the first heat insulation layer.

In some embodiments of the present application, the cold shield includes a first pipe, both ends of the first pipe are connected to the inner container, and a distance difference exists between both ends of the first pipe for connecting to the inner container in a gravity direction, the first pipe is formed inside with the medium passage, a portion between both ends of the first pipe surrounds an outer side of the inner container, and at least a portion of the first pipe is located between the first thermal insulation layer and the inner container, and the first pipe is in contact with or has a distance from the first thermal insulation layer.

In some embodiments of the present application, one end of the first conduit is connected to the bottom of the inner container and the other end is connected to the top of the inner container.

In some embodiments of the present application, the storage container further comprises a second tube disposed inside the inner container, the second tube being fixed at an upper end thereof to the top of the inner container, the first tube being disposed at one end of the top of the inner container and connected to the second tube; the lower end of the second conduit extends to the bottom of the inner vessel.

In some embodiments of the present application, the lower end of the second conduit is lower than the end of the first conduit connected to the bottom of the inner container.

In some embodiments of the present application, the storage container further comprises a second thermal insulation layer covering an outer surface of the inner container, the second thermal insulation layer being located between the outer surface of the inner container and the cold shield.

In some embodiments of the present application, further comprising: the self-pressurizing device comprises a third pipeline, two ends of the third pipeline are communicated with the inner container, the distance difference exists between two ends of the third pipeline, which are connected with the inner container, in the gravity direction, and the middle of the third pipeline is wound on the inner wall surface of the shell, the outer wall surface of the shell or the outer side of the shell.

In some embodiments of the present application, the third conduit is provided with a first control valve.

In some embodiments of the present application, the cavity is a vacuum cavity, and the housing is provided with an interface communicating with the cavity, the interface being used for extracting air from the cavity and detecting a degree of vacuum.

In some embodiments of the present application, the container further includes inner and outer container supports disposed between the outer shell and the inner container to maintain the cavity between the outer wall surface of the inner container and the inner wall surface of the outer shell, the inner and outer container supports being covered with an insulating layer; and/or the bottom of the shell is provided with a container support; and/or a gas-liquid circulation pipeline is connected to the inner container, one end of the gas-liquid circulation pipeline penetrates through the outer shell and is arranged on the outer side of the outer shell, and one end of the gas-liquid circulation pipeline, which is arranged on the outer side of the outer shell, is connected with a second control valve.

Has the advantages that: the storage container comprises an outer shell, an inner container, a first heat insulation layer and a cold screen, wherein a cavity is formed between the outer shell and the inner container, the first heat insulation layer and the cold screen are arranged in the cavity, the first heat insulation layer covers the outer surface of the inner container and is used for preventing external heat from entering the inner container and preventing cold energy in the inner container from dissipating; the cold screen is connected with the inner container, so that an inner circulation channel is formed between the cold screen and the inner container, low-temperature liquid in the inner container enters the medium channel of the cold screen and then exchanges heat with the first heat insulation layer, the first heat insulation layer is in a low-temperature state, and when the heat insulation layer is at a low temperature, the heat conductivity of the heat insulation layer is reduced, so that the heat radiation can be reduced, further, the heat radiation quantity of the storage container is reduced, the heat insulation performance of the storage container is improved, the static evaporation rate of the storage container is reduced, and the static evaporation rate of the storage container meets the requirement. The liquid in the medium channel of the cold shield absorbs heat and is gasified, so that the pressure of the liquid is increased, the liquid flows into the inner container and is cooled by the liquid in the inner container to form internal circulation.

In addition, the storage container of this application still is provided with from the booster, from the booster including setting up the third pipeline on the inner wall of shell or outer wall, third pipeline both ends all communicate with the inside of inner container, when the inside liquid of third pipeline absorbs the heat, take place the gasification, then get into inside the inner container, make the inside pressure increase of inner container, in order to maintain the inside pressure balance of inner container, make inside liquid of inner container or gaseous can discharge outside the inner container, wherein, the third pipeline is when absorbing external temperature, the heat that the external world got into in the cavity has been reduced simultaneously, improve storage container's heat preservation effect.

Drawings

Fig. 1 is a schematic view of the structure of a storage container.

Description of the main element symbols: 10-inner container, 11-gas-liquid circulation pipeline, 12-second control valve, 20-outer shell, 21-inner and outer container support, 22-container support, 23-interface, 30-cavity, 41-first heat insulation layer, 42-second heat insulation layer, 51-first pipeline, 52-second pipeline, 61-third pipeline.

Detailed Description

The utility model provides a storage container, for making the utility model discloses a purpose, technical scheme and effect are clearer, make clear and definite, and it is right that the following refers to the attached drawing and the embodiment of lifting the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically, electrically or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other suitable relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

A storage container comprises an outer shell 20, an inner container 10 and a first heat insulation layer 41, wherein the outer shell 20 is provided with a cavity, the inner container 10 is arranged in the cavity, the inner container 10 is used for storing liquid, such as liquid oxygen, liquid nitrogen, liquid argon, liquefied natural gas, liquid hydrogen, liquid helium and the like, and the liquid is in a low temperature state, namely oxygen, nitrogen, argon, natural gas, hydrogen, helium and the like are below-160 ℃ and exist in a liquid form. A cavity 30 is formed between the outer wall surface of the inner container 10 and the inner wall surface of the outer shell 20, a first thermal insulation layer 41 is installed in the cavity 30, and the first thermal insulation layer 41 surrounds the outer surface of the inner container 10 and is used for preventing external heat from entering the inner container 10 and preventing cold loss in the inner container 10. By ambient is meant the environment outside the housing 20.

Specifically, a cold screen is further disposed in the cavity 30, the cold screen is disposed between the first thermal insulation layer 41 and the outer surface of the inner container 10, the cold screen is provided with a medium channel, two ends of the medium channel are both communicated with the inner container 10, and a distance difference exists between two ends of the medium channel in the gravity direction. The cold shield and the first thermal insulation layer 41 can transfer heat therebetween, and the cold shield and the first thermal insulation layer 41 can transfer heat therebetween by heat conduction or heat radiation. Both ends of the medium channel on the cold shield are communicated with the inner container 10, so that liquid in the inner container 10 can enter the medium channel from the lower end of the medium channel, and the liquid is in a low-temperature state, so that the liquid can absorb heat at a position between the first thermal insulation layer 41 and the outer surface of the inner container 10, and the first thermal insulation layer 41 and the position between the first thermal insulation layer 41 and the outer surface of the inner container 10 are at a low temperature. The liquid in the medium channel absorbs heat and is gasified, the gas returns to the inner container 10 from the higher end of the medium channel, and contacts with the low-temperature liquid in the inner container 10 to exchange heat, so that the gas is cooled into liquid, an internal circulation of automatic operation is formed, and the temperature of the first thermal insulation layer 41 and the position between the first thermal insulation layer 41 and the outer surface of the inner container 10 is reduced.

In the present application, the liquid stored inside the inner vessel 10 serves as a medium for heat exchange on the cold shield.

Since the thermal conductivity of the first thermal insulation layer 41 is lowered at a low temperature, heat radiation can be reduced, and the heat propagation of the storage container is generally heat radiation and heat conduction, the amount of heat radiation of the storage container is reduced, the daily evaporation rate of the storage container can be reduced, that is, the thermal insulation performance of the storage container is improved. The heat transferred by the cold shield is used to maintain the first thermal insulation layer 41 in a low temperature environment, so that the thermal conductivity of the first thermal insulation layer 41 is small, and therefore, the required cold is not much, and the temperature of the liquid in the inner container 10 is not substantially affected.

In the above, since the cold shield is connected to the inner container 10, the cold shield surrounds the outer surface of the inner container 10, and the liquid inside the inner container 10 can circulate between the cold shield and the inner container 10, the inner container 10 needs to pass through the cold shield and the first thermal insulation layer 41 when performing heat radiation. In the present application, the cold shield transmits the cold in the inner container 10 to the first thermal insulation layer 41, thereby reducing the thermal conductivity of the first thermal insulation layer 41 and improving the thermal insulation performance of the storage container. When the storage container is used for storing liquid oxygen, liquid nitrogen, liquid argon, liquefied natural gas, liquid hydrogen, liquid helium and other liquids, the temperature of the storage container can be as low as 269 ℃ below zero, and the heat radiation amount of the storage container can be reduced by more than 50%.

For the storage container, the static evaporation rate of the storage container needs to reach the national standard, and the storage container of the application reduces the static evaporation rate through the arrangement of the cold screen and the first heat insulation layer 41, so that the storage container of the application can reach or even be superior to the requirement of the national standard.

The cold screen includes a first pipe 51, both ends of the first pipe 51 are connected to the inner container 10, and a distance difference exists between the two ends of the first pipe 51 for connecting to the inner container 10 in a gravity direction, a medium passage is formed inside the first pipe 51, a portion between the two ends of the first pipe 51 surrounds an outer side of the inner container 10, at least a portion of the first pipe 51 is located between the first thermal insulation layer 41 and the inner container 10, and the first pipe 51 is in contact with or spaced from the first thermal insulation layer 41. When the first pipe 51 and the first thermal insulation layer 41 are in a contact position, heat conduction can be realized between the first pipe 51 and the first thermal insulation layer 41; when the first duct 51 and the first thermal insulation layer 41 have a space therebetween, heat exchange between the first duct 51 and the first thermal insulation layer 41 is performed by heat radiation, and therefore, the first thermal insulation layer 41 is brought into a low-temperature environment by the heat exchange between the first duct 51 and the first thermal insulation layer 41, the thermal conductivity of the first thermal insulation layer 41 is reduced, the daily evaporation rate of the storage container is reduced, and the thermal insulation performance of the storage container is improved.

In the above, the portion between the two ends of the first pipe 51 surrounds the outer side of the inner container 10, so that the length of the first pipe 51 is increased, the heat exchange area between the first pipe 51 and the first heat insulation layer 41 is increased, and the heat exchange effect is improved. In addition, when the liquid in the inner container 10 is thermally radiated, the liquid in the first duct 51 surrounding the outer side of the inner container 10 is absorbed, and the heat insulation performance of the storage container is improved.

In detail, one end of the first pipe 51 is connected to the bottom of the inner container 10, and the other end is connected to the top of the inner container 10, so that there is a large distance difference between both ends of the first pipe 51 in the gravity direction. After the liquid in the first pipe 51 is vaporized, the weight of the gas in the unit volume is less than that of the liquid in the unit volume, so that the gas enters the inner container 10 from the higher end of the first pipe 51, i.e., the gas enters the inner container 10 from the top of the inner container 10, and is cooled again to be liquid in the inner container 10. By providing a large distance difference, a large pressure difference can be provided between both ends of the first pipe 51, and the flow velocity of the gas, that is, the fluidity of the internal circulation can be improved.

In some embodiments, the storage container further includes a second pipe 52, the second pipe 52 is disposed inside the inner container 10, the upper end of the second pipe 52 is fixed to the top of the inner container 10, the lower end of the second pipe 52 extends to the bottom of the inner container 10, and the first pipe 51 is disposed at one end of the top of the inner container 10 and connected to the second pipe 52. The first pipe 51 is arranged at one end of the top of the inner container 10 and is used for circulating gas after liquid gasification, the gas is guided to the bottom of the inner container 10 through the second pipe 52, the gas is cooled by the liquid in the inner container 10 to form liquid when flowing in the second pipe 52, and the second pipe 52 extends from the lower end to the bottom of the inner container 10, so that the gas entering the inner part of the second pipe 52 has enough heat exchange area to be cooled to liquid.

Wherein the lower end of the second pipe 52 extends to the bottom of the inner container 10, so that the lower end of the second pipe 52 can be inserted into the liquid inside the inner container 10, ensuring that the gas flowing through the second pipe 52 has sufficient heat exchange area and is cooled again to liquid inside the inner container 10.

The liquid in the inner container 10 is vaporized when the temperature rises, that is, the material in two states of liquid and gas exists in the inner container 10, the gaseous material is lighter and exists in the upper part of the inner container 10, and the liquid material exists in the lower part of the inner container 10, so that the second pipe 52 extends to the bottom of the inner container 10, and the gaseous material can exchange heat with the low-temperature liquid in the inner container 10 when in the second pipe 52, and then is cooled to be the liquid material.

In a preferred embodiment, the lower end of the second conduit 52 is lower than the end of the first conduit 51 connected to the bottom of the inner vessel 10, so that the gaseous substance in the first conduit 51 can still be liquefied when the liquid level inside the inner vessel 10 is in a lower position. Wherein the lower end of the second conduit 52 is not less than 10mm lower than the end of the first conduit 51 connected to the bottom of the inner vessel 10, ensuring that the gaseous substance in the first conduit 51 can be liquefied.

In the above, the first pipe 51 may also be replaced by a heat exchange plate provided with a medium channel, that is, the refrigerant transferring structure includes a heat exchange plate provided with a medium channel, and the medium channel of the heat exchange plate is communicated with the inside of the inner container 10.

The storage container further comprises a second insulation layer 42, the second insulation layer 42 covering the outer surface of the inner container 10, the second insulation layer 42 being located between the outer surface of the inner container 10 and the cold shield. The second heat insulating layer 42 is disposed on the outer surface of the inner container 10, so that the cooling capacity of the inner container 10 that generates heat radiation needs to sequentially pass through the second heat insulating layer 42 and the first heat insulating layer 41 to reach the external environment, and a double-layer heat insulating layer is present by the arrangement of the second heat insulating layer 42 and the first heat insulating layer 41, thereby improving the heat insulating effect of the storage container. Moreover, the refrigerant transfer structure is interposed between the second heat insulating layer 42 and the first heat insulating layer 41, and is capable of exchanging heat between the first heat insulating layer 41 and the second heat insulating layer 42 at the same time, so that the first heat insulating layer 41 and the second heat insulating layer 42 are both in a low temperature environment, and the first heat insulating layer 41 and the second heat insulating layer 42 are both in a state of low thermal conductivity, thereby improving the heat preservation effect of the storage container.

In one embodiment, the storage container further comprises a self-pressurizing unit for vaporizing the liquid stored in the interior of the inner container 10 so that it can be discharged from the interior of the inner container 10. That is, when the storage container needs to be discharged to a pipe or other equipment, the liquid in the inner container 10 is vaporized by pressurization by the self-pressurization device and discharged from the inside of the inner container 10.

The self-pressurizing device comprises a third pipeline 61, two ends of the third pipeline 61 are communicated with the inner container 10, the middle part of the third pipeline 61 is wound on the inner wall surface of the outer shell 20, the outer wall surface of the outer shell 20 or the outer side of the outer shell 20, therefore, liquid can enter the third pipeline 61, and the distance difference exists between the two ends of the third pipeline 61, which are connected with the inner container 10, in the gravity direction, so that the liquid in the third pipeline 61 is gasified when absorbing heat and then enters the inner container 10, the pressure in the inner container 10 is increased, the pressure balance in the inner container 10 is maintained, and further, gas or liquid in the inner container 10 can be discharged.

The self-pressurizer further comprises a first control valve for controlling the flow of liquid and/or gas in the third conduit 61, i.e. the first control valve is opened when it is desired to pressurize the interior of the inner container 10, such that the self-pressurizer is circulated with the interior of the inner container 10. In other words, when the liquid or gas inside the inner container 10 needs to be discharged, the third tube 61 and the inner container 10 form a circulation channel, and the liquid inside the inner container 10 enters the third tube 61, then absorbs the heat from the outside and is gasified, and then returns to the inside of the inner container 10, so that the gas pressure inside the inner container 10 is increased, and the liquid or gas inside the inner container 10 can be discharged. The first control valve can control the on-off of the third pipeline 61, and can also regulate the flow rate of the liquid in the third pipeline 61, so as to achieve the effect of controlling the pressure inside the inner container 10.

In detail, the middle of the third pipeline 61 is wound on the inner wall surface of the casing 20 or the outer wall surface of the casing 20, so that when the third pipeline 61 absorbs the external temperature, the heat entering the cavity 30 from the outside is reduced, and the heat preservation effect of the storage container is improved.

In the above, the cavity 30 is a vacuum cavity, that is, the inside of the cavity 30 is in a vacuum state, so that a medium capable of transferring heat between the inner container 10 and the outer shell 20 is reduced, and the heat preservation effect of the storage container is improved.

Specifically, the housing 20 is provided with a port 23 communicating with the cavity 30, and the port 23 is used for drawing air into the cavity 30 to form vacuum in the cavity 30 and also for installing a sensor capable of detecting the degree of vacuum in the cavity 30.

The storage container further includes inner and outer container supports 21, the inner and outer container supports 21 being provided between the outer shell 20 and the inner container 10 to hold a cavity 30 formed between an outer wall surface of the inner container 10 and an inner wall surface of the outer shell 20; the inner and outer container supports 21 are coated with an insulating layer to reduce heat transfer between the inner container 10 and the outer shell 20.

The bottom of the housing 20 is provided with a container holder 22, and the container holder 22 is used to fix the storage container to a corresponding site. Inner container 10 is connected with gas-liquid circulation pipeline 11, and the one end of gas-liquid circulation pipeline 11 runs through shell 20 and places the outside of shell 20 in, and the one end that outer shell 20's outside was placed in to gas-liquid circulation pipeline 11 is connected with second control valve 12, and gas-liquid circulation pipeline 11 cladding has the heat preservation, and wherein, gas-liquid circulation pipeline 11 is used for filling liquid and discharging the liquid in inner container 10 to inner container 10, and second control valve 12 is used for controlling the break-make of gas-liquid circulation pipeline 11.

In detail, the inner vessel 10 and the inner and outer vessel supports 21 are made of austenitic stainless steel or nickel-based material which can withstand a temperature of-269 ℃ or even lower, and the outer vessel 20 is made of austenitic stainless steel, nickel-based or low alloy steel material. The heat insulating layer includes aluminum foil and glass fiber paper, and the aluminum foil and the glass fiber paper are not less than one, in other words, the first heat insulating layer 41 and the second heat insulating layer 42 each include aluminum foil and glass fiber paper.

In the storage container, when assembled, the first pipe 51 is wound around the outer surface of the inner container 10, and then a second heat insulating layer 42 mainly composed of aluminum foil and glass fiber paper is wound around the outer surface of the inner container 10 to a certain thickness, the second heat insulating layer 42 covers the entire outer surface of the inner container 10 or is wound around a gap existing after the first pipe 51 is wound, and then a first heat insulating layer 41 mainly composed of aluminum foil and glass fiber paper is wound to a certain thickness outside the first pipe 51, and the first heat insulating layer 41 completely covers the entire outer surface of the inner container 10. The third pipe 61 of the self-pressurizing device is wound around the inner wall surface of the outer casing 20, the inner container 10 with the first pipe 51, the second heat insulating layer 42 and the first heat insulating layer 41 mounted thereon is mounted in the outer casing 20, and finally air is drawn into the cavity 30 formed between the inner container 10 and the outer casing 20, so that a vacuum is formed in the cavity 30.

It should be understood that equivalent substitutions or changes can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such changes or substitutions should be considered as the protection scope of the present invention.

Claims (10)

1. A storage container, comprising:

an inner container for storing a liquid;

the outer shell is provided with a cavity, the inner container is arranged in the cavity, and a cavity is formed between the outer wall surface of the inner container and the inner wall surface of the outer shell;

a first thermal insulation layer disposed within the cavity and surrounding an outer side of the inner container;

the cold screen is arranged between the first heat insulation layer and the outer surface of the inner container, the cold screen is provided with a medium channel, two ends of the medium channel are communicated with the inner container, the distance between two ends of the medium channel in the gravity direction is different, and heat can be transferred between the cold screen and the first heat insulation layer.

2. The storage container according to claim 1, wherein the cold shield includes a first pipe having both ends connected to the inner container and having a distance difference in a gravity direction between both ends for connection to the inner container, the first pipe having the medium passage formed therein, a portion between both ends of the first pipe surrounding an outer side of the inner container, and at least a portion of the first pipe being located between the first thermal insulation layer and the inner container, the first pipe being in contact with or spaced apart from the first thermal insulation layer.

3. A storage container as claimed in claim 2, in which the first conduit is connected at one end to the bottom of the inner container and at the other end to the top of the inner container.

4. The storage container of claim 3, further comprising:

a second pipe disposed inside the inner container, the upper end of the second pipe being fixed to the top of the inner container, the first pipe being connected to the second pipe at one end of the top of the inner container;

the lower end of the second pipe extends to the bottom of the inner container.

5. A storage vessel as claimed in claim 4, in which the lower end of the second conduit is lower than the end of the first conduit connected to the base of the inner vessel.

6. The storage container of claim 1, further comprising:

a second thermal insulation layer covering an outer surface of the inner vessel, the second thermal insulation layer being located between the outer surface of the inner vessel and the cold shield.

7. The storage container of claim 1, further comprising:

the self-pressurizing device comprises a third pipeline, two ends of the third pipeline are communicated with the inner container, the distance difference exists between two ends of the third pipeline, which are connected with the inner container, in the gravity direction, and the middle of the third pipeline is wound on the inner wall surface of the shell, the outer wall surface of the shell or the outer side of the shell.

8. A storage vessel as claimed in claim 7, in which the third conduit is provided with a first control valve.

9. A storage container as claimed in claim 1 wherein the cavity is a vacuum cavity and the housing is provided with an interface communicating with the cavity for drawing air into the cavity and detecting the vacuum level.

10. The storage container of claim 1, further comprising:

inner and outer container supporting members which are provided between the outer casing and the inner container to maintain the cavity between the outer wall surface of the inner container and the inner wall surface of the outer casing, and which are coated with insulating layers; and/or

A container support is arranged at the bottom of the shell; and/or

The inner container is connected with a gas-liquid circulation pipeline, one end of the gas-liquid circulation pipeline penetrates through the outer shell and is arranged on the outer side of the outer shell, and one end of the gas-liquid circulation pipeline, which is arranged on the outer side of the outer shell, is connected with a second control valve.

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