Rare gas extraction device

Abstract

The utility model provides a rare gas extraction device. The device comprises an enrichment tower, a steel cylinder and a first pipeline, one end of the first pipeline is connected with the enrichment tower, the other end of the first pipeline is connected with the steel cylinder, and a temperature detection point and a flow detection point are arranged on the first pipeline; the first valve is arranged on the first pipeline; one end of the second pipeline is connected with the first pipeline and the other end is communicated with external atmosphere; the second valve is arranged on the second pipeline; the temperature controller is connected with the temperature detection point, the first valve and the second valve and used for detecting the temperature of the temperature detection point and controlling the opening degree of the first valve and the opening degree of the second valve according to the temperature of the temperature detection point. The flow controller is connected with the flow detection point, the first valve and the second valve and used for detecting the flow of the flow detection point and controlling the opening degree of the first valve and the opening degree of the second valve according to the flow of the flow detection point. According to the invention, continuous production and operation of the coarse rare gas can be ensured, and the product quality and production efficiency are effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of rare gas extraction, and in particular to a rare gas extraction device. Background Art

[0002] Neon-helium mixed gas is a rare gas with high economic value. With the rapid development of science and technology, it has been widely used in medicine and cutting-edge science and technology. The existing technology usually separates and extracts crude neon-helium mixed gas from the air, and then extracts neon-helium mixed gas with components that meet the set standards from the crude neon-helium mixed gas.

[0003] The existing crude neon-helium extraction device cannot control the production parameters during the extraction process, resulting in reduced purity and yield of the extracted neon-helium mixed gas and low production efficiency. Utility Model Content

[0004] The purpose of the present application is to provide a rare gas extraction device, which can improve the parameter control in the process of extracting a neon-helium mixed gas with components that meet the standards from a crude neon-helium mixed gas, thereby improving the purity and product of the neon-helium mixed gas.

[0005] Other features and advantages of the present application will become apparent from the following detailed description, or may be learned in part by the practice of the present application.

[0006] According to one aspect of an embodiment of the present application, there is provided a rare gas extraction device, the device comprising: an enrichment tower for extracting rare gas;

[0007] Steel cylinders, used to store rare gases;

[0008] The first pipeline has one end connected to the enrichment tower and the other end connected to the cylinder, and a temperature detection point and a flow detection point are arranged on the first pipeline;

[0009] A first valve is arranged in the first pipeline;

[0010] A second pipeline, one end of which is connected to the first pipeline and the other end of which is connected to the outside atmosphere, wherein the connection point between the second pipeline and the first pipeline is located between the enrichment tower and the first valve;

[0011] a second valve, disposed in the second pipeline;

[0012] The temperature controller is connected to the temperature detection point, the first valve and the second valve respectively, and is used to detect the temperature of the temperature detection point and control the opening of the first valve and the second valve according to the temperature of the temperature detection point;

[0013] The flow controller is connected to the flow detection point, the first valve and the second valve respectively, and is used to detect the flow at the flow detection point and control the opening of the first valve and the second valve according to the flow at the flow detection point.

[0014] Optionally, also include:

[0015] The vaporizer is arranged in the first pipeline and located between the first valve and the cylinder.

[0016] Optionally, the number of vaporizers is N, where N is a positive integer greater than or equal to 2.

[0017] Optionally, also include:

[0018] The compressor is arranged in the first pipeline and is located between the vaporizer and the cylinder.

[0019] Optionally, also include:

[0020] A product analyzer is arranged in the first pipeline and located between the enrichment tower and the first valve;

[0021] The controller is electrically connected to the product analyzer, the first valve and the second valve respectively, and is used to control the first valve to close and the second valve to open when the gas components in the first pipeline received from the product analyzer do not meet the set standards.

[0022] Optionally, the first valve is located between the temperature detection point and the cylinder, and the first valve is located between the flow detection point and the cylinder.

[0023] Optionally, the connection point between the second pipeline and the first pipeline is located between the temperature detection point and the first valve, and the connection point between the second pipeline and the first pipeline is located between the flow detection point and the first valve.

[0024] Optionally, the number of steel cylinders is M, where M is a positive integer greater than or equal to 1.

[0025] Optionally, a heat exchanger is provided at the top of the enrichment tower, one end of the first pipeline is connected to the top of the enrichment tower, and the bottom of the enrichment tower is connected to the crude rare gas source.

[0026] Optionally, also include:

[0027] A liquid nitrogen separation tank, wherein a side inlet of the liquid nitrogen separation tank is connected to a liquid nitrogen source through a pipeline, a bottom outlet of the liquid nitrogen separation tank is connected to the liquid nitrogen source and an inlet of a heat exchanger through a pipeline, and a top inlet of the liquid nitrogen separation tank is connected to an outlet of the heat exchanger through a pipeline;

[0028] The third pipeline, the bottom outlet of the enrichment tower is also connected to the side inlet of the liquid nitrogen separation tank.

[0029] In the technical solution of the embodiment of the present application, a mixed gas of rare gases whose components meet the set standards is extracted from the initial gas through an enrichment tower. When the enrichment tower starts working, it is in the pre-cooling and liquid accumulation stage. At this time, the temperature controller can be used to control the closing of the first valve and the opening of the second valve to ensure the uniform distribution of cold and save the time of pre-cooling the accumulated liquid in the enrichment tower. When the enrichment tower enters the operating stage, the opening of the second valve is controlled by the flow controller so that the enrichment tower can quickly enter the optimal operating condition. When the rare gas output by the enrichment tower is qualified, the first valve is opened, the second valve is closed, and the qualified rare gas is filled into the cylinder from the enrichment tower. The temperature controller and the flow controller can control the enrichment tower to quickly enter the operating stage after startup, ensure the continuous production and operation of the rare gas, and effectively improve the quality and production efficiency of the rare gas.

[0030] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a schematic structural diagram of a rare gas extraction device according to an embodiment of the present application;

[0033] Figure 2 It is a schematic diagram of the structure of a neon-helium gas extraction device according to an embodiment of the present application. DETAILED DESCRIPTION

[0034] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this application will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0035] It should be noted that the "multiple" mentioned in this article refers to two or more. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the objects used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those shown or described.

[0037] The implementation details of the technical solution of the embodiment of the present application are described in detail below:

[0038] According to one aspect of the present application, a method for adjusting the angle of a vehicle rearview mirror is provided. Figure 1 This is a schematic diagram of the structure of a rare gas extraction device according to an embodiment of the present application, which is described in detail as follows:

[0039] Please refer to Figure 1 , a device for extracting rare gases is provided, the device comprising: an enrichment tower 101 for extracting rare gases;

[0040] Steel cylinder 102, used for storing rare gas;

[0041] A first pipeline 103, one end of which is connected to the enrichment tower 101, and the other end of which is connected to the cylinder 102. The first pipeline 103 is provided with a temperature detection point and a flow detection point;

[0042] A first valve 104 is provided in the first pipeline 103;

[0043] A second pipeline 105, one end of which is connected to the first pipeline 103, and the other end of which is connected to the outside atmosphere, wherein the connection point between the second pipeline 105 and the first pipeline 103 is located between the enrichment tower 101 and the first valve 104;

[0044] A second valve 106, disposed in the second pipeline 105;

[0045] The temperature controller 107 is connected to the temperature detection point, the first valve 104, and the second valve 106, respectively, and is used to detect the temperature of the temperature detection point and control the opening of the first valve 104 and the second valve 106 according to the temperature of the temperature detection point;

[0046] The flow controller 108 is connected to the flow detection point, the first valve 104 and the second valve 106 respectively, and is used to detect the flow at the flow detection point and control the opening of the first valve 104 and the second valve 106 according to the flow at the flow detection point.

[0047] The functions of the components of the rare gas extraction device provided in this embodiment are as follows:

[0048] The enrichment tower 101 is used to separate the crude mixed rare gas separated from the air by cooling and heat exchange for distillation to obtain a mixed rare gas with target components. The crude mixed rare gas has a high nitrogen content. The nitrogen is liquefied and discharged through heat exchange to reduce the nitrogen content in the mixed gas, thereby controlling the content of the rare gas in the mixed gas after distillation to reach the set standard.

[0049] The steel cylinder 102 is used to store the rare gas mixture extracted from the enrichment tower 101 .

[0050] The first pipeline 103 is used to charge the rare gas mixture with components meeting the standards outputted from the enrichment tower 101 into the cylinder 102 .

[0051] The first valve 104 is used to control the on-off of the first pipeline 103 and the flow rate of the rare gas mixture in the first pipeline 103 .

[0052] The second pipeline 105 is used to discharge the mixed gas with components that do not meet the standards output by the enrichment tower 101 to prevent the substandard gas from being filled into the cylinder 102;

[0053] The second valve 106 is used to control the on-off of the second pipeline 105 and the flow rate of the substandard gas discharged from the second pipeline 105;

[0054] The temperature controller 107 is used to control the first valve 104 to close and the second valve 106 to open during the pre-cooling liquid accumulation stage of the crude mixed rare gas in the enrichment tower 101, and to control the pre-cooling rate of the enrichment tower 101 by allowing the mixed gas to flow out of the enrichment tower 101. When the enrichment tower 101 delivers the rare mixed gas with qualified components to the cylinder 102, the opening of the first valve 104 is controlled according to the detected temperature.

[0055] The flow controller 108 is used to quickly establish the distillation condition of the enrichment tower 101 by controlling the first valve 104 to close and the second valve 106 to open during the establishment stage of heat exchange and cooling of the crude mixed rare gas in the enrichment tower 101, so as to maintain the state of balanced inlet and outlet gas volume of the enrichment tower 101. When the enrichment tower 101 delivers the rare mixed gas with qualified components to the cylinder 102, the opening of the first valve 104 is controlled according to the detected flow rate.

[0056] The following takes neon-helium mixed gas as an example to introduce in detail the rare gas extraction device of the embodiment of the present application. The rare gas extraction device is referred to as the neon-helium gas extraction device hereinafter. It can be understood that neon-helium gas refers to a mixed gas whose components are mainly neon and helium, and its components also include hydrogen and nitrogen. Therefore, the neon-helium gas mentioned here is actually a mixed gas of neon, helium, nitrogen and hydrogen, but because the neon and helium components therein meet the set standards, it is called neon-helium gas.

[0057] like Figure 2 As shown, the neon-helium gas extraction device includes: an enrichment tower 201, which is used to extract neon-helium gas.

[0058] The steel cylinder 202 is used to store neon and helium gases.

[0059] One end of the first pipeline 203 is connected to the enrichment tower 201 , and the other end is connected to the cylinder 202 . The first pipeline 203 is provided with a temperature detection point and a flow detection point.

[0060] The first valve 204 is disposed in the first pipeline 203 .

[0061] A second pipeline 205, one end of which is connected to the first pipeline 203, and the other end of which is connected to the outside atmosphere, wherein the connection point between the second pipeline 205 and the first pipeline 203 is located between the enrichment tower 201 and the first valve 204;

[0062] The second valve 206 is disposed in the second pipeline 205 .

[0063] The temperature controller 207 is connected to the temperature detection point, the first valve 204 and the second valve 206 respectively, and is used to detect the temperature of the temperature detection point and control the opening of the first valve 204 and the second valve 206 according to the temperature of the temperature detection point.

[0064] The flow controller 208 is connected to the flow detection point, the first valve 204 and the second valve 206 respectively, and is used to detect the flow at the flow detection point and control the opening of the first valve 204 and the second valve 206 according to the flow at the flow detection point.

[0065] In some possible implementations, such as Figure 2 As shown, a heat exchanger 209 is provided at the top of the enrichment tower 201, one end of the first pipeline 203 is connected to the top of the enrichment tower 201, and the bottom of the enrichment tower 201 is connected to the crude neon-helium gas source. The device also includes a liquid nitrogen separation tank 210, the side inlet of the liquid nitrogen separation tank 210 is connected to the liquid nitrogen source through a pipeline for receiving external liquid nitrogen, the bottom outlet of the liquid nitrogen separation tank 210 is connected to the liquid nitrogen source through a pipeline and the inlet of the heat exchanger 209, and the top inlet of the liquid nitrogen separation tank 210 is connected to the outlet of the heat exchanger 209 through a pipeline. The third pipeline 213, the bottom outlet of the enrichment tower 201 is also connected to the side inlet of the liquid nitrogen separation tank 210.

[0066] It is understandable that the temperature controller 207 may adopt a TIC temperature controller (Temperature Indicating Controller), and the flow controller 208 may adopt a FIC temperature controller (Flow Indicating Controller), which is not limited here.

[0067] Compared with other components, neon and helium in the air have the lowest boiling point and less content. The volume content of neon is 18ppm and the volume content of helium is 5.2ppm. The air is condensed by a condenser evaporator. The non-condensable gas is mainly a mixed gas of nitrogen, hydrogen, neon and helium. As a crude neon-helium gas source, the crude neon-helium gas (a mixed gas of nitrogen, hydrogen, neon and helium) is transported to the enrichment tower 201 for distillation separation. The liquid nitrogen separation tank 210 introduces the supercooled liquid nitrogen into the heat exchanger 209. The crude neon-helium gas is used as an ascending gas in the enrichment tower 201 and exchanges heat with the heat exchanger 209 at the top of the tower. The nitrogen therein is condensed as a downstream liquid. The liquid nitrogen formed by the liquefaction of nitrogen is sent to the liquid nitrogen separation tank 210 for recycling at the bottom of the enrichment tower 201 through the third pipeline 213. The neon-helium mixed gas whose components reach the set standard after removing the nitrogen can be transported to the cylinder 202 for storage through the first pipeline 203. The neon-helium mixed gas whose components do not meet the set standard after removing the nitrogen can be discharged into the atmosphere through the second pipeline 205.

[0068] In some feasible implementations, Figure 2 As shown, the device further includes: a vaporizer 211, which is arranged in the first pipeline 203 and located between the first valve 204 and the cylinder 202. Specifically, the number of vaporizers 211 is N, where N is a positive integer greater than or equal to 2. Figure 2 An example is given in which the number of vaporizers 211 is two. The vaporizer 211 is used to adjust the neon-helium mixed gas with the components meeting the standards to room temperature before filling it into the cylinder 202. The vaporizer 211 can be an air bath type vaporizer or an air temperature type vaporizer, wherein the air bath type vaporizer heats the neon-helium mixed gas with the components meeting the standards to room temperature by heat exchange, which is not limited here.

[0069] In some feasible implementations, Figure 2 As shown, the device further includes: a compressor 212, which is arranged in the first pipeline 203 and is located between the vaporizer 211 and the steel cylinder 202. The compressor 212 can be a membrane compressor 212, which is used to isothermally compress the neon-helium mixed gas and fill it into the steel cylinder 202. The compressor 212 can be a membrane compressor, which is not limited here.

[0070] In some feasible implementations, Figure 2As shown, the device also includes: a product analyzer 214, which is arranged in the first pipeline 203, between the enrichment tower 201 and the first valve 204. The controller 215 is electrically connected to the product analyzer 214, the first valve 204, and the second valve 206, respectively, and is used to control the first valve 204 to close and the second valve 206 to open when the gas components in the first pipeline 203 sent by the product analyzer 214 do not meet the set standard. The product analyzer 214 is used to detect whether the components of the neon-helium mixed gas output by the enrichment tower 201 are qualified and display the test results. If the components of the neon-helium mixed gas are qualified, it proves that the mixed gas meets the standard and can be filled into the cylinder 202 through the first pipeline 203. If it is unqualified, it is discharged into the atmosphere through the second pipeline 205.

[0071] It is understandable that the product analyzer 214 is used to detect the content of each component in the neon-helium mixed gas. A gas detector, such as a gas chromatograph, may be used, which is not limited here.

[0072] In some feasible implementations, Figure 2 As shown, the number of the cylinders 202 is M, where M is a positive integer greater than or equal to 1. Figure 2 An example is given in which the number of the cylinders 202 is six.

[0073] Combine the following Figure 2 The specific operation of crude neon-helium extraction using the crude neon-helium extraction device of the embodiment of the present application is specifically described:

[0074] During the crude neon and helium extraction process, when the enrichment tower 201 starts to work, it first enters the pre-cooling and liquid accumulation stage. The temperature controller 207 controls the first valve 204 to close and controls the opening of the second valve 206. By controlling the flow rate of the gas in the enrichment tower 201 discharged from the second pipeline 205 to the atmosphere, the pre-cooling rate of the enrichment tower 201 is controlled to shorten the time for pre-cooling and accumulating liquid in the enrichment tower 201 on the basis of ensuring uniform distribution of cooling capacity in the enrichment tower 201. Specifically, in the pre-cooling and liquid accumulation stage of the enrichment tower 201, the non-condensable gas from the condenser evaporator is introduced into the enrichment tower 201, and the opening of the second valve 206 is adjusted according to the temperature drop at the outlet of the enrichment tower 201. The temperature drop rate in the enrichment tower 201 shall not be faster than -30°C / hour. When the outlet temperature of the enrichment tower 201 is lower than -180°C, the pre-cooling and liquid accumulation stage of the enrichment tower 201 ends.

[0075] When the enrichment tower 201 enters the working condition stage, the opening of the second valve 206 is controlled by the flow controller 208, so that the enrichment tower 201 can quickly enter the optimal operating condition with balanced inlet and outlet gas volumes. During the enrichment tower 201 establishing working condition stage, as the amount of liquid in the enrichment tower 201 increases, the evaporation amount of circulating nitrogen in the top heat exchanger 209, the bottom liquid level of the enrichment tower 201, and the liquid nitrogen separation tank 210 is stable.

[0076] Finally, the enrichment tower 201 enters the product delivery stage. At this time, the product analyzer 214 detects that the neon-helium mixed gas in the first passage is qualified, opens the first valve 204, closes the second valve 206, and the neon-helium mixed gas is input from the enrichment tower 201 to the vaporizer 211, and then heated after passing through the vaporizer 211, and finally isothermally compressed by the compressor 212 and filled into the cylinder 202.

[0077] Exemplarily, the component contents of the neon-helium mixed gas are set to 40% neon, 12% helium, 3% hydrogen, and 45% nitrogen. When the product analyzer 214 detects that the mixed gas in the first passage reaches the standard, the mixed gas is input into the vaporizer 211, and after being heated by the vaporizer 211, it is isothermally compressed by the compressor 212 and filled into the cylinder 202.

[0078] When the components of the mixed gas meet the standards, the temperature and flow rate will be maintained within a certain standard range. Therefore, in the product delivery stage, the temperature controller 207 or the flow controller 208 can be selected for distribution control.

[0079] The temperature of the mixed gas will increase with the increase of hydrogen content. For example, when the temperature controller 207 is used for distribution, when the temperature controller 207 detects at the temperature detection point that the temperature of the mixed gas output from the enrichment tower 201 continues to decrease in the range below -189°C, the opening of the first valve 204 is controlled to decrease. When the temperature controller 207 detects at the temperature detection point that the temperature of the mixed gas output from the enrichment tower 201 continues to increase in the range of -189°C to -184°C, the opening of the first valve 204 is controlled to increase. When the temperature controller 207 detects at the temperature detection point that the temperature of the mixed gas output from the enrichment tower 201 is higher than -184°C, the second valve 206 is controlled to open to discharge part of the mixed gas to maintain the output condition of the enrichment tower.

[0080] For example, when the flow controller 208 is used for distribution, when the flow controller 208 detects that the flow rate at the flow detection point is between 5 and 6.5 Nm 3 / h, the opening of the first valve 204 is controlled to increase, and the flow controller 208 detects that the flow rate at the flow detection point is less than 5Nm 3 / h, the second valve 206 is controlled to open to discharge part of the mixed gas to maintain the output condition of the enrichment tower.

[0081] It should be noted that, regardless of whether the temperature controller 207 or the flow controller 208 is used for distribution control, the product analyzer 214 continuously detects the component content of the mixed gas. As long as the product analyzer 214 detects that the hydrogen content in the mixed gas exceeds the set standard, it sends a signal to the controller 215, and the controller 215 controls the first valve 204 to close and the second valve 206 to open according to the signal, so as to discharge the mixed gas with unqualified components to maintain the output condition of the enrichment tower.

[0082] Exemplarily, the hydrogen content in the mixed gas output by the enrichment tower 201 is set to be less than 5%. No matter what stage it is, as long as the product analyzer 214 detects that the hydrogen content in the mixed gas reaches or exceeds 5%, a signal is sent to the controller 215, and the controller 215 controls the first valve 204 to close and the second valve 206 to open according to the signal.

[0083] In the technical scheme of the embodiment of the present application, during the crude neon-helium extraction process, when the enrichment tower 201 starts to work, the enrichment tower 201 is in the pre-cooling liquid accumulation stage. At this time, the opening of the second valve 206 can be controlled by the temperature controller 207 to ensure the time for the enrichment tower 201 to pre-cool the accumulated liquid on the basis of uniform distribution of cold. When the enrichment tower 201 enters the working condition stage, the opening of the second valve 206 is controlled by the flow controller 208, so that the enrichment tower 201 can quickly enter the optimal operating condition. When the product analyzer 214 detects that the neon-helium mixed gas of the second valve 206 is qualified, the first valve 204 is opened, the second valve 206 is closed, and the neon-helium mixed gas is extracted from the enrichment tower 201 and enters the vaporizer 211, and then after the vaporizer 211 is heated, it is finally isothermally compressed by the compressor 212 and filled into the cylinder 202. The compressor 212 can be pre-cooled faster through the temperature controller 207 and the flow controller 208 and quickly enter the working stage, thereby ensuring the continuous production and operation of the crude neon-helium mixed gas, and effectively improving the product quality and production efficiency.

[0084] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be performed without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A rare gas extraction device, characterized in that: include: Enrichment tower, used to extract rare gases; A steel cylinder for storing the rare gas; A first pipeline, one end of which is connected to the enrichment tower, and the other end of which is connected to the cylinder, wherein a temperature detection point and a flow detection point are arranged on the first pipeline; A first valve, disposed in the first pipeline; A second pipeline, one end of which is connected to the first pipeline and the other end of which is connected to the outside atmosphere, wherein the connection point between the second pipeline and the first pipeline is located between the enrichment tower and the first valve; a second valve, disposed in the second pipeline; a temperature controller, connected to the temperature detection point, the first valve, and the second valve, respectively, for detecting the temperature of the temperature detection point and controlling the opening of the first valve and the second valve according to the temperature of the temperature detection point; The flow controller is connected to the flow detection point, the first valve and the second valve respectively, and is used to detect the flow at the flow detection point and control the opening of the first valve and the second valve according to the flow at the flow detection point.

2. The device according to claim 1, characterized in that Also includes: The vaporizer is arranged in the first pipeline and located between the first valve and the cylinder.

3. The device according to claim 2, characterized in that The number of the vaporizers is N, where N is a positive integer greater than or equal to 2.

4. The device according to claim 2, characterized in that Also includes: The compressor is arranged in the first pipeline and is located between the vaporizer and the cylinder.

5. The device according to claim 1, characterized in that Also includes: A product analyzer, disposed in the first pipeline, between the enrichment tower and the first valve; The controller is electrically connected to the product analyzer, the first valve, and the second valve, respectively, and is used to control the first valve to close and the second valve to open when the gas composition in the first pipeline sent by the product analyzer does not meet the set standard.

6. The device according to claim 1, characterized in that The first valve is located between the temperature detection point and the steel cylinder, and the first valve is located between the flow detection point and the steel cylinder.

7. The device according to claim 1, characterized in that The connection point between the second pipeline and the first pipeline is located between the temperature detection point and the first valve, and the connection point between the second pipeline and the first pipeline is located between the flow detection point and the first valve.

8. The device according to claim 1, characterized in that The number of the steel cylinders is M, where M is a positive integer greater than or equal to 1.

9. The device according to claim 1, characterized in that A heat exchanger is arranged at the top of the enrichment tower, one end of the first pipeline is connected to the top of the enrichment tower, and the bottom of the enrichment tower is connected to a crude rare gas source.

10. The device according to claim 9, characterized in that Also includes: A liquid nitrogen separation tank, wherein the side inlet of the liquid nitrogen separation tank is connected to a liquid nitrogen source through a pipeline, the bottom outlet of the liquid nitrogen separation tank and the liquid nitrogen source are connected to the inlet of the heat exchanger through a pipeline, and the top inlet of the liquid nitrogen separation tank is connected to the outlet of the heat exchanger through a pipeline; The third pipeline, the bottom outlet of the enrichment tower is also connected to the side inlet of the liquid nitrogen separation tank.

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