Argon recovery device

Abstract

The utility model provides an argon recovery device which comprises a first heat exchanger and a backup liquid argon storage tank, the outlet end of the first heat exchanger is connected with a decarburization device used for decarburizing crude argon to be recovered through a pipeline, and the outlet end of the decarburization device is connected with a second heat exchanger through a pipeline. The outlet end of the second heat exchanger is connected with a dehydration device used for dehydrating crude argon to be recycled through a pipeline, the outlet end of the dehydration device is connected with a rectifying tower through a pipeline, the first heat exchanger is provided with a first refrigerant inlet and a first refrigerant outlet, and the second heat exchanger is provided with a second refrigerant inlet and a second refrigerant outlet. And the backup liquid argon storage tank is used for enabling liquid argon to sequentially flow through the first refrigerant inlet, the first refrigerant outlet, the second refrigerant inlet, the second refrigerant outlet and the pipeline at the outlet end of the rectifying tower. The argon recovery device is reasonable in structure, energy-saving and good in argon recovery effect.

Description

Technical Field

[0001] The utility model relates to an argon recovery device, in particular to an argon recovery device. Background Art

[0002] Tail gas is the raw material crude xenon gas, which is mainly produced by the photovoltaic industry, monocrystalline silicon and polycrystalline silicon industry. It contains CO and O2. Generally, pretreatment is carried out to react CO into CO2, and O2 into water through hydrogenation. Some carbon compounds are also reacted into CO2 and water, resulting in a large amount of CO2 and water in the crude xenon gas. The water here is gaseous water. When recovering the crude xenon gas, an argon recovery device is required.

[0003] In the prior art, existing argon recovery devices are usually equipped with a pre-cooler, whose purpose is to produce low-temperature chilled water (5-8°C). The chilled water is used to exchange heat with the high-temperature crude xenon gas to cool the process gas and meet the process requirements. In this process, the pre-cooler provides a cold source to absorb the heat of the process gas. The use of the pre-cooler consumes electricity and water, which wastes a certain amount of energy. Now, an argon recovery device is urgently needed to solve the above problems. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide an argon recovery device to solve the problems raised in the above background technology. The utility model has a reasonable structure, saves energy, and has a good argon recovery effect.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions: an argon recovery device, comprising:

[0006] A first heat exchanger and a backup liquid argon storage tank, the outlet end of the first heat exchanger is connected to a decarbonization device for decarbonizing the crude argon gas to be recovered through a pipeline, the outlet end of the decarbonization device is connected to a second heat exchanger through a pipeline, the outlet end of the second heat exchanger is connected to a dehydration device for dehydrating the crude argon gas to be recovered through a pipeline, the outlet end of the dehydration device is connected to a distillation tower through a pipeline, the first heat exchanger is provided with a first refrigerant inlet and a first refrigerant outlet, the second heat exchanger is provided with a second refrigerant inlet and a second refrigerant outlet, and the backup liquid argon storage tank is used to allow liquid argon to flow through the pipelines of the first refrigerant inlet, the first refrigerant outlet, the second refrigerant inlet, the second refrigerant outlet and the outlet end of the distillation tower in sequence.

[0007] Furthermore, delivery pipes are provided between the first refrigerant inlet and the backup liquid argon storage tank, between the first refrigerant outlet and the second refrigerant inlet, and between the second refrigerant outlet and the pipeline at the outlet end of the distillation tower.

[0008] A valve is provided on the delivery pipe between the first refrigerant inlet and the backup liquid argon storage tank.

[0009] Furthermore, both the decarbonization device and the dehydration device are molecular sieve purifiers.

[0010] Furthermore, the first heat exchanger and the second heat exchanger have the same specifications, and both the first heat exchanger and the second heat exchanger are air bath type evaporators.

[0011] Furthermore, the inlet end of the first heat exchanger is connected to the crude argon gas to be recovered through a pipeline.

[0012] Furthermore, the temperature of the liquid argon in the backup liquid argon storage tank is -186°C.

[0013] According to an argon recovery device of the present invention, the temperature of the crude argon gas to be recovered is lowered by using a first heat exchanger and a second heat exchanger, so that the temperature entering the dehydration device is lowered and the moisture content is reduced. The first heat exchanger and the second heat exchanger are used to reduce the heat exchange pressure of the first heat exchanger and the second heat exchanger, perform step-by-step heat exchange, increase the heat exchange effect and increase the service life of the heat exchanger, thereby enhancing the argon recovery effect. By using a backup liquid argon storage tank, liquid argon is used as a cold source for the first heat exchanger and the second heat exchanger, and liquid argon is used instead of chilled water and high-temperature process gas for heat exchange. No additional energy is required, thereby saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments with reference to the following drawings:

[0015] Figure 1 Schematic diagram of the structure of an argon recovery device according to one embodiment of the present invention;

[0016] In the figure: 1. First heat exchanger; 101. First refrigerant inlet; 102. First refrigerant outlet; 2. Decarbonization device; 3. Second heat exchanger; 301. Second refrigerant inlet; 302. Second refrigerant outlet; 4. Dehydration device; 5. Distillation tower; 6. Delivery pipe; 61. Valve; 7. Backup liquid argon storage tank. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] like Figure 1 As shown, the utility model provides a technical solution: an argon recovery device, comprising:

[0019] The first heat exchanger 1 and the backup liquid argon storage tank 7, the outlet end of the first heat exchanger 1 is connected to a decarbonization device 2 for decarbonizing the crude argon gas to be recovered through a pipeline, the outlet end of the decarbonization device 2 is connected to a second heat exchanger 3 through a pipeline, the outlet end of the second heat exchanger 3 is connected to a dehydration device 4 for dehydrating the crude argon gas to be recovered through a pipeline, and the outlet end of the dehydration device 4 is connected to a distillation tower 5 through a pipeline. The first heat exchanger 1 is provided with a first refrigerant inlet 101 and a first refrigerant outlet 102, and the second heat exchanger 3 is provided with a second refrigerant inlet 301 and a second refrigerant outlet 302. The backup liquid argon storage tank 7 is used to allow the liquid argon to flow through the first refrigerant inlet 101 and the first refrigerant outlet 102 in sequence. , the second refrigerant inlet 301, the second refrigerant outlet 302 and the pipeline at the outlet end of the distillation tower 5. This design uses the first heat exchanger 1 and the second heat exchanger 3 to cool the crude argon gas to be recovered, so that the temperature entering the dehydration device 4 is reduced and the moisture content is reduced. The first heat exchanger 1 and the second heat exchanger 3 are used to reduce the heat exchange pressure of the heat exchanger, perform step-by-step heat exchange, increase the heat exchange effect and increase the service life of the first heat exchanger 1 and the second heat exchanger 3, thereby enhancing the argon recovery effect. By using the backup liquid argon storage tank 7, liquid argon is used as the cold source of the first heat exchanger 1 and the second heat exchanger 3, and liquid argon is used instead of chilled water and high-temperature process gas for heat exchange. No additional energy is required, thereby saving energy.

[0020] A delivery pipe 6 is provided between the first refrigerant inlet 101 and the backup liquid argon storage tank 7, between the first refrigerant outlet 102 and the second refrigerant inlet 301, and between the second refrigerant outlet 302 and the outlet end of the distillation tower 5, thereby improving the rationality of the design.

[0021] A valve 61 is provided on the delivery pipe 6 between the first refrigerant inlet 101 and the backup liquid argon storage tank 7 . This design facilitates the release of liquid ammonia in the backup liquid argon storage tank 7 by using the valve 61 .

[0022] The decarbonization device 2 and the dehydration device 4 are both molecular sieve purifiers. This design facilitates the decarbonization and dehydration of the crude argon gas to be recovered, wherein the molecular sieve purifier is a prior art.

[0023] The first heat exchanger 1 and the second heat exchanger 3 have the same specifications. Both the first heat exchanger 1 and the second heat exchanger 3 are air bath type vaporizers. This design uses a backup liquid argon storage tank 7 to vaporize liquid argon through the air bath type vaporizer to replenish the argon gas volume. This process is to exchange heat between low-temperature liquid argon and air. Liquid argon serves as a cold source. Liquid argon is used instead of chilled water and high-temperature process gas for heat exchange. No additional energy is required, thereby saving energy. Among them, the air bath type vaporizer is existing technology.

[0024] The inlet end of the first heat exchanger 1 is connected to the crude argon gas to be recovered through a pipeline, and the temperature of the liquid argon in the backup liquid argon storage tank 7 is -186°C, which improves the rationality of the design.

[0025] Reference Figure 1 As an embodiment of the present invention: the staff uses the first heat exchanger 1 and the second heat exchanger 3 to cool the crude argon gas to be recovered, so that the temperature entering the dehydration device 4 is reduced and the moisture content is reduced. The first heat exchanger 1 and the second heat exchanger 3 are used to reduce the heat exchange pressure of the heat exchanger, perform step-by-step heat exchange, increase the heat exchange effect and increase the service life of the first heat exchanger 1 and the second heat exchanger 3, thereby enhancing the argon recovery effect. By using the backup liquid argon storage tank 7 to open the valve 61, the liquid argon is vaporized by the first heat exchanger 1 and the second heat exchanger 3 as an air bath vaporizer and then the argon gas volume is replenished. This process is to exchange heat between low-temperature liquid argon and air, and liquid argon is used as a cold source. Liquid argon is used instead of chilled water and high-temperature process gas for heat exchange. No additional energy is required, thereby saving energy and improving the practicality of the present invention.

[0026] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, from all perspectives, the embodiments should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and range of equivalents of the claims be included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0027] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An argon recovery device, characterized in that: include: A first heat exchanger (1) and a backup liquid argon storage tank (7), wherein the outlet end of the first heat exchanger (1) is connected to a decarburization device (2) for decarburizing the crude argon gas to be recovered via a pipeline (8), the outlet end of the decarburization device (2) is connected to a second heat exchanger (3) via a pipeline (8), the outlet end of the second heat exchanger (3) is connected to a dehydration device (4) for dehydrating the crude argon gas to be recovered via a pipeline (8), the outlet end of the dehydration device (4) is connected to a second heat exchanger (3) via a pipeline (8), A distillation tower (5) is provided, wherein the first heat exchanger (1) is provided with a first refrigerant inlet (101) and a first refrigerant outlet (102), and the second heat exchanger (3) is provided with a second refrigerant inlet (301) and a second refrigerant outlet (302), and the backup liquid argon storage tank (7) is used to allow liquid argon to flow sequentially through the first refrigerant inlet (101), the first refrigerant outlet (102), the second refrigerant inlet (301), the second refrigerant outlet (302) and the pipeline (8) at the outlet end of the distillation tower (5).

2. The argon recovery device according to claim 1, characterized in that: A delivery pipe (6) is provided between the first refrigerant inlet (101) and the backup liquid argon storage tank (7), between the first refrigerant outlet (102) and the second refrigerant inlet (301), and between the second refrigerant outlet (302) and the pipeline (8) at the outlet end of the distillation tower (5).

3. The argon recovery device according to claim 2, characterized in that: A valve (61) is provided on the delivery pipe (6) between the first refrigerant inlet (101) and the backup liquid argon storage tank (7).

4. The argon recovery device according to claim 1, characterized in that: The decarbonization device (2) and the dehydration device (4) are both molecular sieve purifiers.

5. The argon recovery device according to claim 1, characterized in that: The first heat exchanger (1) and the second heat exchanger (3) have the same specifications, and both the first heat exchanger (1) and the second heat exchanger (3) are air bath type vaporizers.

6. The argon recovery device according to claim 1, characterized in that: The inlet end of the first heat exchanger (1) is connected to the crude argon gas to be recovered through a pipeline (8).

7. The argon recovery device according to claim 1, characterized in that: The temperature of the liquid argon in the backup liquid argon storage tank (7) is -186°C.

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