A cryogenic pump system for hydrogen-helium separation

Abstract

The application provides a refrigeration machine cryogenic pump system suitable for hydrogen-helium separation, and particularly relates to the field of low-temperature adsorption technology, and comprises a refrigeration unit and an adsorption unit, wherein the adsorption unit comprises a hydrogen adsorption pump body and a helium adsorption pump body, an air inlet is sequentially connected to the hydrogen adsorption pump body and the helium adsorption pump body, the hydrogen adsorption pump body and the helium adsorption pump body are arranged in a vacuum cold box, the hydrogen adsorption pump body comprises a hydrogen barrier plate and a hydrogen adsorption array which are sequentially arranged from the direction of the air inlet, the hydrogen adsorption array and the helium adsorption array have the same structure and comprise a heat-conducting disc and a plurality of adsorption plates connected to the heat-conducting disc, the helium adsorption pump body comprises a helium barrier plate and a helium adsorption array which are sequentially arranged from the direction of the air inlet, and the refrigeration unit is used for controlling the hydrogen barrier plate, the helium barrier plate, the hydrogen adsorption array and the helium adsorption array to be in different temperature zones and respectively completing adsorption of different components; by controlling the hydrogen barrier plate, the helium barrier plate, the hydrogen adsorption array and the helium adsorption array to be in different temperature zones, the application can complete graded adsorption of impurity gas and high-purity separation of hydrogen isotopes.

Description

Technical Field

[0001] This invention relates to the field of low-temperature adsorption technology, and in particular to a cryogenic pump system for a refrigeration unit suitable for hydrogen-helium separation. Background Technology

[0002] In the toroidal chamber of a fusion reactor, as the fusion reaction proceeds, deuterium and tritium are gradually consumed, while the amount of helium produced by fusion gradually increases. The accumulation of helium and other impurity gases causes the plasma to gradually cool down. Therefore, in order to continue the fusion reaction, the exhaust gas must be continuously extracted from the toroidal chamber for purification. Since the deuterium-tritium reaction rate in current fusion devices is very low, a large amount of unreacted deuterium and tritium exists in the exhaust gas. From the perspectives of safety, environmental protection, and economy, the exhaust gas must be treated to recover the deuterium-tritium fuel.

[0003] Vacuum pump technology plays a crucial role in fusion devices. In fusion devices, plasma continuously emits waste gases containing hydrogen isotopes (H2, D2, T2), helium (He), and various impurities (such as N2, CO2, H2O, CH4, etc.). For these gases, the vacuum system not only needs to maintain a high vacuum environment but also needs to achieve efficient recovery of hydrogen isotopes and separation of impurities for fuel recycling and resource reuse. Existing technologies, such as patent WO2005123212A2, propose a cryogenic pump to enhance hydrogen pumping capacity by using a fin structure coated with activated carbon to improve hydrogen pumping efficiency. However, it cannot achieve the classification of impurity gases and the high-purity separation of hydrogen isotopes. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a cryogenic pump system for hydrogen-helium separation.

[0005] This invention is achieved through the following technical solution: This invention proposes a cryogenic pump system for hydrogen-helium separation, comprising a refrigeration unit and an adsorption unit, wherein: The adsorption unit includes a hydrogen adsorption pump body and a helium adsorption pump body. The inlet is connected to the hydrogen adsorption pump body and the helium adsorption pump body in sequence. The hydrogen adsorption pump body and the helium adsorption pump body are disposed in a vacuum cold box. The hydrogen adsorption pump body includes a hydrogen baffle and a hydrogen adsorption array arranged in sequence from the direction of the inlet. The hydrogen adsorption array and the helium adsorption array have the same structure and have a heat-conducting disk and multiple adsorption plates connected thereto. The helium adsorption pump body includes a helium baffle and a helium adsorption array arranged in sequence from the direction of the inlet. The refrigeration unit is used to control the hydrogen baffle, the helium baffle, the hydrogen adsorption array and the helium adsorption array to be in different temperature zones and to complete the adsorption of different components respectively.

[0006] Furthermore, the refrigeration unit is used to control the hydrogen barrier to be located in the 80K temperature range, the hydrogen adsorption array to be located in the 10K temperature range or the 4.2K temperature range, the helium barrier to be located in the 80K temperature range, and the helium adsorption array to be located in the 4.2K temperature range.

[0007] Furthermore, the refrigeration unit includes a first two-stage GM refrigerator connected externally to the hydrogen adsorption pump body and a second two-stage GM refrigerator connected externally to the helium adsorption pump body. The first two-stage GM refrigerator has a first-stage cold head with a temperature range of 80K and a second-stage cold head with a temperature range of 10K or 4.5K. The second two-stage GM refrigerator has a first-stage cold head with a temperature range of 80K and a second-stage cold head with a temperature range of 4.5K.

[0008] Furthermore, a hydrogen cooling screen and a helium cooling screen are respectively provided in the hydrogen adsorption pump body and the helium adsorption pump body. The hydrogen baffle is connected to the hydrogen cooling screen, and the helium baffle is connected to the helium cooling screen. The first-stage cold head and the second-stage cold head of the first GM refrigerator are respectively connected to the hydrogen cooling screen and the hydrogen adsorption array. The first-stage cold head and the second-stage cold head of the second GM dual-head refrigerator are respectively connected to the second-stage cold screen and the helium adsorption array.

[0009] Furthermore, it also includes: a first heater and a first temperature sensor connected to the hydrogen barrier and the hydrogen cooling screen heating; a second heater and a second temperature sensor connected to the hydrogen adsorption array; a third heater and a third temperature sensor connected to the helium barrier and the helium cooling screen; and a fourth heater and a fourth temperature sensor connected to the helium adsorption array.

[0010] Furthermore, it also includes an enrichment analysis unit, with the air inlet connected in sequence to the air inlet valve, the hydrogen adsorption pump body, the gate valve, and the helium adsorption pump body. The enrichment analysis unit is connected to the hydrogen adsorption pump body and the helium adsorption pump body through a hydrogen solenoid valve and a helium solenoid valve, respectively.

[0011] Furthermore, the collection and analysis unit includes a microchromatograph-mass spectrometer and a circulating pump, wherein the hydrogen solenoid valve and the helium solenoid valve are connected to the circulating pump, and the circulating pump is connected to the microchromatograph-mass spectrometer.

[0012] Furthermore, the enrichment analysis unit also includes a hydrogen enrichment and recovery tank, a helium enrichment and recovery tank, and an impurity gas recovery tank. The outlet of the microchromatograph-mass spectrometer is connected to the hydrogen enrichment and recovery tank, the helium enrichment and recovery tank, and the impurity gas recovery tank via a hydrogen recovery valve, respectively.

[0013] Furthermore, it also includes a vacuum pump and a vacuum angle valve, one end of which is connected to the hydrogen solenoid valve and the helium solenoid valve respectively, and the other end is connected to the vacuum pump.

[0014] Furthermore, the enrichment analysis unit also includes a circulation tank, one end of which is connected to a circulation valve and a microchromatograph-mass spectrometer in sequence, and the other end is connected to the inlet of the air inlet valve.

[0015] The beneficial effects of this invention are: (1) The cryogenic pump system for hydrogen-helium separation proposed in this invention can achieve graded adsorption of impurity gases and high-purity separation of hydrogen isotopes by controlling different temperature zones of hydrogen baffle, helium baffle, hydrogen adsorption array and helium adsorption array.

[0016] (2) The cryogenic pump system for hydrogen-helium separation proposed in this invention can significantly reduce the heat load at 4.6K and 10K by covering the cold head body with a cold shield, thereby improving the refrigeration efficiency of the two refrigerators.

[0017] (3) The cryogenic pump system for hydrogen-helium separation proposed in this invention uses heaters and refrigerators to perform high-precision temperature control on hydrogen baffles, helium baffles, hydrogen adsorption arrays and helium adsorption arrays. It can complete adsorption and desorption according to the different gas desorption characteristics, thereby improving the recovery rate and repeatability. Attached Figure Description

[0018] Figure 1 This is a structural diagram of the cryogenic pump system for hydrogen-helium separation of the present invention. In the diagram: 1. Inlet valve; 2. First heater; 3. First temperature sensor; 4. Hydrogen cooling screen; 5. Hydrogen adsorption array; 6. Second heater; 7. Second temperature sensor; 8. Hydrogen baffle; 9. Hydrogen adsorption pump body; 10. First two-stage GM refrigerator; 11. Third heater; 12. Third temperature sensor; 13. Helium adsorption array; 14. Helium cooling screen; 15. Helium adsorption pump body; 16. Fourth heater; 17. Fourth temperature sensor; 18. Helium baffle; 19. Second two-stage GM refrigerator; 20. Vacuum cold box; 21. Hydrogen solenoid valve; 22. Helium solenoid valve; 23. Circulating pump; 24. Vacuum angle valve; 25. Vacuum pump; 26. Microchromatograph-mass spectrometer; 27. Circulating valve; 28. Circulating tank; 29. ​​Hydrogen recovery valve; 30. Hydrogen enrichment and recovery tank; 31. Helium recovery valve; 32. Helium enrichment and recovery tank; 33. Impurity gas recovery valve; 34. Impurity gas recovery tank; 35. Gate valve. The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] To more clearly and completely illustrate the technical solution of the present invention, the present invention will be further described below with reference to the accompanying drawings.

[0020] Please refer to Figure 1 This invention proposes a cryogenic pump system for hydrogen-helium separation, comprising a refrigeration unit and an adsorption unit, wherein: The adsorption unit includes a hydrogen adsorption pump body 9 and a helium adsorption pump body 15. The inlet is connected to the hydrogen adsorption pump body 9 and the helium adsorption pump body 15 in sequence. The hydrogen adsorption pump body 9 and the helium adsorption pump body 15 are set inside the vacuum cold box 20. The hydrogen adsorption pump body 9 includes a hydrogen baffle 8 and a hydrogen adsorption array 5 arranged in sequence from the direction of the inlet. The hydrogen adsorption array 5 and the helium adsorption array 13 have the same structure and have a heat-conducting disk and multiple adsorption plates connected to it. The helium adsorption pump body 15 includes a helium baffle 18 and a helium adsorption array 13 arranged in sequence from the direction of the inlet. The refrigeration unit is used to control the hydrogen baffle 8, the helium baffle 18, the hydrogen adsorption array 5 and the helium adsorption array 13 to be in different temperature zones and to complete the adsorption of different components respectively.

[0021] In a specific embodiment, the vacuum cold box 20 isolates the hydrogen adsorption pump body 9 and the helium adsorption pump body 15 from the outside. The hydrogen baffle 8 and the helium baffle 18 are made of aluminum or stainless steel and are configured as a composite structure of louvers and herringbone shapes with a blade tilt angle of 45°. The refrigeration unit controls the hydrogen baffle 8, the helium baffle 18, the hydrogen adsorption array 5, and the helium adsorption array 13 to be in different temperature zones. Subsequently, the hydrogen baffle 8 and the helium baffle 18 guide the flow, reduce the incident heat flux, shield radiation, and condense water vapor. The hydrogen adsorption array 5 is used to complete the adsorption of hydrogen isotopes such as H2, D2, and T2, while the helium adsorption array 13 is responsible for adsorbing helium and some low-condensation-point components such as neon. By controlling the hydrogen baffle 8, the helium baffle 18, the hydrogen adsorption array 5, and the helium adsorption array 13 to different temperature zones, it is possible to complete the graded adsorption of impurity gases and the high-purity separation of hydrogen isotopes.

[0022] Furthermore, the refrigeration unit is used to control the hydrogen baffle 8 to be located in the 80K temperature range, the hydrogen adsorption array 5 to be located in the 10K temperature range or the 4.2K temperature range, the helium baffle 18 to be located in the 80K temperature range, and the helium adsorption array 13 to be located in the 4.2K temperature range.

[0023] In a specific implementation, the refrigeration unit is used to control the hydrogen baffle 8, helium baffle 18, hydrogen adsorption array 5, and helium adsorption array 13 to be located in different temperature zones. In different temperature zones, the gas completes the blocking of external heat radiation and adsorption of high-freezing-point impurity gases (such as H2O, CO2), hydrogen isotopes such as H2, D2, and T2, and low-freezing-point components such as helium and some neon. The impurity gas classification and high-purity separation of hydrogen isotopes are achieved through different temperature zones.

[0024] Furthermore, the refrigeration unit includes a first two-stage GM refrigerator 10 externally connected to the hydrogen adsorption pump body 9 and a second two-stage GM refrigerator 19 externally connected to the helium adsorption pump body 15. The first two-stage GM refrigerator 10 has a first-stage cold head with a temperature range of 80K and a second-stage cold head with a temperature range of 10K or 4.5K. The second two-stage GM refrigerator 19 has a first-stage cold head with a temperature range of 80K and a second-stage cold head with a temperature range of 4.5K.

[0025] In a specific implementation, when the temperature of the second-stage cold head of the first dual-stage GM refrigerator 10 is 10K, coconut shell activated carbon needs to be coated on the connected hydrogen adsorption array 5 to capture hydrogen. When the temperature of the second-stage cold head of the first dual-stage GM refrigerator 10 is 4.5K, hydrogen can be directly condensed. The helium adsorption array 13 connected to the second-stage cold head of the second dual-stage GM refrigerator 19 is coated with coconut shell activated carbon for adsorbing helium.

[0026] Furthermore, hydrogen adsorption pump body 9 and helium adsorption pump body 15 are respectively equipped with hydrogen cooling screen 4 and helium cooling screen 14. Hydrogen baffle 8 is connected to hydrogen cooling screen 4 and helium baffle 18 is connected to helium cooling screen 14. The first-stage cold head and second-stage cold head of the first GM refrigerator are respectively connected to hydrogen cooling screen 4 and hydrogen adsorption array 5. The first-stage cold head and second-stage cold head of the second GM dual head are respectively connected to second-stage cold screen and helium adsorption array 13.

[0027] In a specific implementation, the hydrogen-cooled screen 4 and the helium-cooled screen 14 are used to isolate the device from external thermal radiation and cool impurity gases. They are mainly made of copper or aluminum and have a low emissivity treatment on the surface (e.g., silver or nickel plating). The operating temperature range is about 77K, which reduces the radiative heat load. The hydrogen-cooled screen 4 covers the first two-stage GM refrigerator 10, while the helium-cooled screen 14 covers the second two-stage GM refrigerator 19, so as to significantly reduce the heat load in the 4.6K and 10K cold zones, thereby improving the cooling efficiency.

[0028] Furthermore, it also includes: a first heater 2 and a first temperature sensor 3 connected to the hydrogen baffle 8 and the hydrogen cooling screen 4 for heating; a second heater 6 and a second temperature sensor 7 connected to the hydrogen adsorption array 5; a third heater 11 and a third temperature sensor 12 connected to the helium baffle 18 and the helium cooling screen 14; and a fourth heater 16 and a fourth temperature sensor 17 connected to the helium adsorption array 13.

[0029] In a specific embodiment, the first temperature heater and the first temperature sensor 3 are used to monitor and control the temperature of the hydrogen barrier 8 and the hydrogen cooling screen 4; the second heater 6 and the second temperature sensor 7 are used to monitor and control the temperature of the hydrogen adsorption array 5; the third heater 11 and the third temperature sensor 12 are used to monitor and control the temperature of the helium barrier 18 and the helium cooling screen 14; and the fourth heater 16 and the fourth temperature sensor 17 are used to monitor and control the temperature of the helium adsorption array 13. The heaters heat the air, and together with the first dual-stage GM refrigerator 10 and the second dual-stage GM refrigerator 19, the temperature can be controlled within different temperature ranges.

[0030] Furthermore, it also includes an enrichment analysis unit, with the air inlet connected in sequence to the air inlet valve 1, the hydrogen adsorption pump body 9, the gate valve 35 and the helium adsorption pump body 15. The enrichment analysis unit is connected to the hydrogen adsorption pump body 9 and the helium adsorption pump body 15 through the hydrogen solenoid valve 21 and the helium solenoid valve 22, respectively.

[0031] In a specific embodiment, a gate valve 35 is positioned between the hydrogen adsorption pump and the helium adsorption pump. The gate valve 35 can isolate the low-temperature zone and the normal temperature zone. The performance parameters of the hydrogen adsorption pump body 9 and the helium adsorption pump body 15 can be tested separately through the gate valve 35. The gas enters the hydrogen adsorption pump body 9 through the inlet valve 1 to complete the efficient adsorption of hydrogen isotopes. Then, it enters the helium adsorption pump body 15 through the gate valve 35 for the next adsorption. After the low-freezing-point components such as helium and some neon are captured, the remaining gas flows out to the enrichment analysis unit through the hydrogen solenoid valve 21 and the helium solenoid valve 22. When the adsorption unit returns to the normal temperature zone, the low-freezing-point components such as hydrogen isotopes, helium and some neon re-enter the enrichment analysis unit.

[0032] Furthermore, the collection and analysis unit includes a microchromatograph-mass spectrometer 26 and a circulating pump 23. A hydrogen solenoid valve 21 and a helium solenoid valve 22 are connected to the circulating pump 23, which is connected to the microchromatograph-mass spectrometer 26.

[0033] In a specific implementation, the main function of the microchromatograph-mass spectrometer 26 is to perform online, rapid quantitative and qualitative analysis of the gas after extraction or desorption. The circulating pump 23, in conjunction with the hydrogen solenoid valve 21 and the helium solenoid valve 22, desorbs the gas from the low-temperature plates (helium barrier 18, helium adsorption array 13, hydrogen barrier 8, hydrogen adsorption array 5) and sends it to the subsequent enrichment tank. The circulating pump 23 also protects the low-temperature adsorption surface, shortens the regeneration time, and provides compression and storage functions.

[0034] Furthermore, the enrichment analysis unit also includes a hydrogen enrichment and recovery tank 30, a helium enrichment and recovery tank 32, and an impurity gas recovery tank 34. The outlet of the microchromatograph-mass spectrometer 26 is connected to the hydrogen enrichment and recovery tank 30 via a hydrogen recovery valve 29, to the helium enrichment and recovery tank 32 via a helium recovery valve 31, and to the impurity gas recovery tank 34 via an impurity gas recovery valve 33.

[0035] In a specific implementation, the hydrogen enrichment and recovery tank 30 and the hydrogen recovery valve 29 work together to recover and temporarily store high-purity hydrogen isotopes. When the microchromatograph-mass spectrometer 26 determines that the content of helium and other impurities in the current desorbed gas has dropped to a set threshold and the purity of hydrogen or hydrogen isotopes meets the recovery requirements, the hydrogen recovery valve 29 is opened, allowing the gas released in this stage to enter the hydrogen enrichment and recovery tank 30. When the impurity content increases or the desorption stage changes, the hydrogen recovery valve 29 is closed to prevent low-purity gas from mixing into the hydrogen enrichment and recovery tank 30. The helium enrichment and recovery tank 32 and the helium recovery valve 31 work together to selectively recover and temporarily store helium, similar to the working principle of the hydrogen enrichment and recovery tank 30. The main function of the impurity gas recovery valve 33 and subsequently the impurity gas recovery tank 34 is to recover and temporarily store impurity gases. When the low-temperature baffle in the adsorption unit is heated to a higher temperature zone, the released gases are CO2, N2, CH4, and H2O. When the impurity components are the main components and online analysis shows that the hydrogen and helium contents are low, the impurity gas valve is opened, allowing the gas released in this stage to enter the impurity gas recovery tank 34.

[0036] Furthermore, it also includes a vacuum pump 25 and a vacuum angle valve 24, one end of which is connected to a hydrogen solenoid valve 21 and a helium solenoid valve 22, and the other end is connected to the vacuum pump 25.

[0037] In a specific implementation, vacuum pump 25 initially evacuates hydrogen adsorption pump body 9 and helium adsorption pump body 15 to reduce heat load and provide basic pumping and vacuum maintenance capabilities for the system. Its functions include rapidly removing participating gases from pipelines and cavities during system startup and initial operation, establishing and maintaining the required vacuum conditions, and ensuring that the overall vacuum level of the device does not become uncontrollable due to changes in the cryogenic pump status. Vacuum angle valve 24 is used to control the disconnection or connection of vacuum pump 25 to the branch.

[0038] Furthermore, the enrichment analysis unit also includes a circulation tank 28, one end of which is connected to a circulation valve 27 and a microchromatograph-mass spectrometer 26, and the other end is connected to the inlet of the gas inlet valve 1.

[0039] In a specific implementation, the circulation tank 28 is used to recover gases that do not meet the recovery requirements, and the circulation valve 27 is used to selectively control the flow direction of the gas flow. During the desorption or staged recovery process of the cryogenic pump, if the content of helium or other impurities in the gas is high and the purity requirements for hydrogen isotope recovery are not met, the circulation valve 27 is opened to allow the gas to flow into the circulation tank 28 for temporary storage. Finally, the gas is sent back into the entire adsorption unit from the inlet of the inlet valve 1 for re-adsorption treatment.

[0040] In summary, the process flow of this invention includes: (1) Adsorption stage: Start the hydrogen adsorption pump 9 and helium adsorption pump 15, and each temperature zone reaches the target temperature. Then, introduce the gas exhaust into the hydrogen adsorption pump 9 and helium adsorption pump 15. Hydrogen isotopes are adsorbed on the hydrogen adsorption array 5 at 10K, helium is captured by the helium adsorption array 13 at 4.6K, and high freezing point impurities are adsorbed by the helium cooling screen 14, hydrogen cooling screen 4, helium barrier 18 and hydrogen barrier 8 in the 77K temperature zone. When the adsorption amount reaches the clean capacity threshold, start the regeneration stage. (2) In the regeneration and graded desorption stage, different temperature zones are heated sequentially by heaters, and the components adsorbed in the corresponding temperature zones are desorbed, introduced into different pipelines and respectively into hydrogen enrichment and recovery tank 30, helium enrichment and recovery tank 32 and impurity gas recovery tank 34. (3) Cooling stage: After desorption is completed, all heaters are turned off, and the cold heads of the first double-stage GM refrigerator 10 and the second double-stage GM refrigerator 19 return to the adsorption temperature zone to start a new round of adsorption.

[0041] Specifically, the gas desorption and collection process includes: (1) controlling the temperature of helium adsorption array 13 to 30K to desorb helium; (2) controlling the temperature of hydrogen adsorption array 5 to 110K to desorb hydrogen and isotope gases; (3) controlling the temperature of helium barrier 18 and hydrogen barrier 8 to 300K to desorb impurity gases such as water, hydrocarbons, and carbon oxides. During the gas collection process, if the purity of hydrogen or helium is found to be below the design requirements, the gas that does not meet the purity will re-enter the inlet through the circulation tank 28 and re-enter the adsorption unit for circulation processing until the target purity is reached.

[0042] Of course, the present invention may have many other embodiments. Based on this embodiment, other embodiments obtained by those skilled in the art without any creative effort are all within the scope of protection of the present invention.

Claims

1. A cryogenic pump system for a refrigeration unit suitable for hydrogen-helium separation, characterized in that, It includes a refrigeration unit and an adsorption unit, wherein: The adsorption unit includes a hydrogen adsorption pump body and a helium adsorption pump body. The inlet is connected to the hydrogen adsorption pump body and the helium adsorption pump body in sequence. The hydrogen adsorption pump body and the helium adsorption pump body are disposed in a vacuum cold box. The hydrogen adsorption pump body includes a hydrogen baffle and a hydrogen adsorption array arranged in sequence from the direction of the inlet. The hydrogen adsorption array and the helium adsorption array have the same structure and have a heat-conducting disk and multiple adsorption plates connected thereto. The helium adsorption pump body includes a helium baffle and a helium adsorption array arranged in sequence from the direction of the inlet. The refrigeration unit is used to control the hydrogen baffle, the helium baffle, the hydrogen adsorption array and the helium adsorption array to be in different temperature zones and to complete the adsorption of different components respectively.

2. The cryogenic pump system for hydrogen-helium separation according to claim 1, characterized in that, The refrigeration unit is used to control the hydrogen barrier to be located in the 80K temperature range, the hydrogen adsorption array to be located in the 10K or 4.2K temperature range, the helium barrier to be located in the 80K temperature range, and the helium adsorption array to be located in the 4.2K temperature range.

3. The cryogenic pump system for hydrogen-helium separation according to claim 2, characterized in that, The refrigeration unit includes a first two-stage GM refrigerator connected externally to the hydrogen adsorption pump body and a second two-stage GM refrigerator connected externally to the helium adsorption pump body. The first two-stage GM refrigerator has a primary cold head with a temperature range of 80K and a secondary cold head with a temperature range of 10K or 4.5K. The second two-stage GM refrigerator has a primary cold head with a temperature range of 80K and a secondary cold head with a temperature range of 4.5K.

4. The cryogenic pump system for hydrogen-helium separation according to claim 3, characterized in that, The hydrogen adsorption pump body and the helium adsorption pump body are respectively equipped with a hydrogen cooling screen and a helium cooling screen. The hydrogen baffle is connected to the hydrogen cooling screen, and the helium baffle is connected to the helium cooling screen. The first-stage cold head and the second-stage cold head of the first GM refrigerator are respectively connected to the hydrogen cooling screen and the hydrogen adsorption array. The first-stage cold head and the second-stage cold head of the second GM dual-head refrigerator are respectively connected to the second-stage cold screen and the helium adsorption array.

5. The cryogenic pump system for hydrogen-helium separation according to claim 4, characterized in that, Also includes: A first heater and a first temperature sensor are connected to the hydrogen barrier and the hydrogen cooling screen heating. A second heater and a second temperature sensor are connected to the hydrogen adsorption array; a third heater and a third temperature sensor are connected to the helium baffle and the helium cooling screen; and a fourth heater and a fourth temperature sensor are connected to the helium adsorption array.

6. The cryogenic pump system for hydrogen-helium separation according to claim 1, characterized in that, It also includes an enrichment analysis unit, with the air inlet connected in sequence to the air inlet valve, the hydrogen adsorption pump body, the gate valve, and the helium adsorption pump body. The enrichment analysis unit is connected to the hydrogen adsorption pump body and the helium adsorption pump body through a hydrogen solenoid valve and a helium solenoid valve, respectively.

7. The cryogenic pump system for hydrogen-helium separation according to claim 6, characterized in that, The collection and analysis unit includes a microchromatograph-mass spectrometer and a circulating pump. The hydrogen solenoid valve and the helium solenoid valve are connected to the circulating pump, which is connected to the microchromatograph-mass spectrometer.

8. The cryogenic pump system for hydrogen-helium separation according to claim 7, characterized in that, The enrichment analysis unit further includes a hydrogen enrichment and recovery tank, a helium enrichment and recovery tank, and an impurity gas recovery tank. The outlet of the microchromatograph-mass spectrometer is connected to the hydrogen enrichment and recovery tank, the helium enrichment and recovery tank, and the impurity gas recovery tank via a hydrogen recovery valve, respectively.

9. The cryogenic pump system for hydrogen-helium separation according to claim 8, characterized in that, It also includes a vacuum pump and a vacuum angle valve, one end of which is connected to the hydrogen solenoid valve and the helium solenoid valve respectively, and the other end is connected to the vacuum pump.

10. The cryogenic pump system for hydrogen-helium separation according to claim 9, characterized in that, The enrichment analysis unit also includes a circulation tank, one end of which is connected to a circulation valve and a microchromatograph-mass spectrometer in sequence, and the other end is connected to the inlet of the air inlet valve.

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