Process method for improving yield of high-purity hydrogen prepared from industrial hydrogen

Abstract

The invention provides a process method for improving the yield of high-purity hydrogen prepared from industrial hydrogen. The process method comprises a gas inlet pipeline, compression equipment, a gas outlet pipeline, a nitrogen pipeline, an instrument air pipeline, a cooling water pipeline, an emptying pipeline and a PLC (Programmable Logic Controller) control system, the PLC control system controls opening and closing of the pneumatic valves on the air inlet pipeline and the air outlet pipeline and controls starting and stopping of the compression equipment. And the control system controls the load, metering and start-stop of the desorbed gas returning raw gas pipeline by controlling the operation load, start-stop and the like of the compression equipment. According to the invention, recycling of the byproduct desorbed gas is realized, and the purposes of improving the yield of high-purity hydrogen and reducing the preparation cost of high-purity hydrogen are achieved.

Description

Technical Field

[0001] This invention belongs to the technical field of improving the yield of high-purity hydrogen in industrial hydrogen production, and particularly relates to a process method for improving the yield of high-purity hydrogen in industrial hydrogen production. Background Technology

[0002] With the increasing application scenarios of hydrogen energy, the demand for hydrogen energy is also constantly increasing. Hydrogen energy applications mainly involve hydrogen production, storage, transportation, refueling, and utilization. Currently, industrial applications of hydrogen production primarily involve the production of high-purity hydrogen / fuel cell hydrogen from industrial hydrogen-rich tail gas, industrial hydrogen production, fossil fuel production, and water electrolysis. As the hydrogen energy market becomes increasingly popular, the high cost of producing high-purity hydrogen / fuel cell hydrogen has become a significant factor limiting the development of the hydrogen energy market in many regions. This invention relates to a process method for improving the yield of high-purity hydrogen from industrial hydrogen production. The main purpose is to increase hydrogen yield, thereby increasing hydrogen production while maintaining a constant scale, ultimately reducing hydrogen production costs and promoting the development of hydrogen energy applications. Summary of the Invention

[0003] To address the aforementioned cost control issues in existing hydrogen energy applications, this invention proposes a process method to improve the yield of high-purity hydrogen in industrial hydrogen production. This method increases hydrogen yield while maintaining the same scale, thereby reducing hydrogen production costs. The desorption gas recovery and utilization process employs standardized and intelligent operations for nitrogen replacement, hydrogen replacement, hydrogen filling, sampling, and metering, improving the overall safety and reliability of hydrogen production operations.

[0004] The technical solution adopted in this invention is as follows: This invention provides a process method for improving the yield of high-purity hydrogen in industrial hydrogen production, including an inlet pipeline, a compression device, an outlet pipeline, a nitrogen pipeline, an instrument air pipeline, a cooling water pipeline, a venting pipeline, and a PLC control system; the PLC control system controls the opening and closing of valves on the inlet and outlet pipelines, as well as the logic control of the compression device; the PLC control system controls the load by controlling the opening and closing of valves on the pipelines, ensuring that the hydrogen yield is improved without affecting the operation of the original device; the PLC control system realizes standardized intelligent operation of nitrogen replacement, hydrogen replacement, hydrogen filling, sampling, metering, and automatic shut-off in case of emergencies during the hydrogen production process, improving the overall safety and reliability of hydrogen filling operations.

[0005] The inlet of the air inlet pipeline is connected to the original device's desorption buffer tank. The air inlet pipeline is equipped with a manual valve, an air inlet pneumatic shut-off valve, an air inlet pneumatic regulating valve, an air inlet filter, a safety valve, a pressure transmitter, a pressure transmitter, and a pressure gauge.

[0006] The intake pneumatic shut-off valve serves as an interlocking protection mechanism; when the compression equipment malfunctions, the intake pneumatic shut-off valve will shut off interlockingly.

[0007] The intake pneumatic regulating valve is used by the PLC control system to control the desorption gas flow rate.

[0008] The pressure transmitter one and pressure transmitter two are set before and after the intake filter. In the PLC control system, they can be used to display the actual operating pressure of the intake pipeline and the filter differential pressure. This allows us to understand the actual operating conditions and ensure that the intake filter meets the usage requirements.

[0009] The safety valve is installed on the intake pipeline to ensure that it can automatically release pressure when the intake pipeline is overpressurized, thereby protecting the intake pipeline.

[0010] The inlet of the air inlet line is connected to the outlet of the original desorption buffer tank, and the addition of a desorption air delivery port is beneficial for the intelligent and automated control of the desorption tank pressure.

[0011] A further improvement of the present invention is that the process method for improving the yield of high-purity hydrogen in industrial hydrogen production includes a compression device. The inlet of the compression device is connected to an air inlet pipeline. The compression device is equipped with multiple pressure and temperature alarms and interlocks to ensure the normal operation of the compression device. A pneumatic regulating valve is installed at the outlet of the compression device.

[0012] Among them, pressure sensors, temperature sensors, etc. are all set with alarm values ​​or interlock values, which can ensure that when the pressure or temperature is abnormal during the operation of the compression equipment, it can be detected and dealt with in a timely manner, so as to protect the compression equipment.

[0013] The pneumatic regulating valve is a reflux regulating valve for the compression equipment. The outlet of the reflux regulating valve is connected to the air inlet pipeline. Its purpose is to control the inlet and outlet exhaust pressure of the compression equipment and ensure the normal load fine-tuning, start-up, and shutdown of the compression equipment.

[0014] A further improvement of the present invention is that the process method for improving the yield of high-purity hydrogen in industrial hydrogen production is provided with an outlet pipeline, which is connected to the outlet of the compression equipment. The outlet pipeline is equipped with a check valve, a manual shut-off valve, a flow meter, an outlet pneumatic regulating valve, a pressure transmitter, a pressure gauge, and a safety valve.

[0015] The PLC control system controls the pressure of the desorbed gas entering the raw material gas through the pneumatic regulating valve, thereby ensuring the stability of the desorbed gas pressure entering the raw material gas pipeline.

[0016] The PLC control system can also control the amount of desorbed gas entering the raw material gas pipeline through the pneumatic regulating valve, control the fluctuation of the data displayed by the flow meter, ensure the stability of the desorbed gas flow rate entering the raw material gas pipeline, and avoid a significant impact on the composition of the raw material gas.

[0017] The second safety valve is installed on the outlet pipeline to ensure that it can automatically release pressure when the outlet pipeline is over-pressurized, thereby protecting the outlet pipeline. It is also installed at the outlet end of the compression equipment to ensure that it can automatically release pressure when the exhaust pressure of the compression equipment is over-pressurized, thereby protecting the compression equipment.

[0018] A one-way valve is installed on the outlet gas pipeline to prevent the pressure of the raw gas pipeline from flowing back into the desorption gas network when the pressure of the outlet gas pipeline is lower than that of the raw gas pipeline, thus avoiding the occurrence of high-pressure-to-low-pressure accidents.

[0019] A further improvement of the present invention is that the process method for improving the yield of high-purity hydrogen in industrial hydrogen production includes a nitrogen pipeline, which is equipped with a nitrogen main manual shut-off valve, a nitrogen main flow meter, a nitrogen main pressure transmitter, a nitrogen main pressure gauge, a nitrogen branch outlet manual shut-off valve, and a nitrogen branch check valve.

[0020] The primary purpose of nitrogen pipeline installation is for purging the inlet and outlet pipelines and compression equipment during start-up and shutdown. Controlled by the manual shut-off valve on the main nitrogen line, this allows for the separate purging of the inlet, compression, and outlet pipelines, facilitating system commissioning after minor troubleshooting. It also reduces the amount of nitrogen purging and hydrogen release simultaneously.

[0021] Each branch line of the nitrogen pipeline is equipped with a manual shut-off valve for nitrogen outlet, which can control the amount of nitrogen used in each nitrogen branch line.

[0022] A nitrogen hose is installed after the manual shut-off valve of the main nitrogen pipe. The nitrogen hose is connected to the manual shut-off valve of the nitrogen branch pipe outlet. When nitrogen replacement is required, the nitrogen hose is connected; when nitrogen replacement is not required, the nitrogen hose can be directly disconnected to achieve hard disconnection of the nitrogen branch pipe and avoid cross-contamination of media and pressure.

[0023] The nitrogen branch pipe check valve is installed in each nitrogen branch pipe and at the gas inlet end. Its main purpose is to prevent the process gas medium from flowing back into the nitrogen pipeline during operation or maintenance.

[0024] A further improvement of the present invention is that the process method for improving the yield of high-purity hydrogen in industrial hydrogen production includes an instrument air pipeline, which is equipped with a manual shut-off valve for the main instrument air pipeline, a flow meter for the main instrument air pipeline, a pressure transmitter for the main instrument air pipeline, a pressure gauge for the main instrument air pipeline, and manual shut-off valves for the outlets of each branch of the instrument air pipeline.

[0025] The main purpose of installing instrument air ducts is to provide the kicking power source for each pneumatic shut-off valve and pneumatic regulating valve in the system;

[0026] The instrument air branch pipe manual shut-off valve controls the amount of instrument air used at each air consumption point.

[0027] A further improvement of the present invention is that the process method for improving the yield of high-purity hydrogen in industrial hydrogen production is provided with cooling water pipelines, which are two separate cooling water pipelines: a cooling water inlet pipeline and a cooling water return pipeline. The cooling water pipelines are equipped with a manual shut-off valve for the cooling water inlet, a sight glass for the cooling water return, a manual shut-off valve for the cooling water return, and a cooling water return flow meter.

[0028] The main purpose of installing cooling water pipelines is to cool the compression equipment, reduce the exhaust temperature of the compression equipment, and ensure that the temperature of the compressed process gas meets the operating requirements.

[0029] The manual shut-off valve for cooling water return controls the amount of cooling water used by the compressor.

[0030] The cooling water return sight glass can be used to observe in real time whether the cooling water operation is smooth.

[0031] The cooling water return flow meter can monitor the instantaneous amount of cooling water consumed by the compressor in real time, and the amount of cooling water used by the compressor can be controlled by the manual shut-off valve of the cooling water return.

[0032] A further improvement of the present invention is that the process method for improving the yield of high-purity hydrogen in industrial hydrogen production includes a venting pipeline, which comprises a replacement venting pipeline and a safety valve venting pipeline. The replacement venting pipeline is equipped with a manually shut-off venting valve one, which is connected to the inlet pipeline, the compression equipment, and the outlet pipeline. The purpose is to allow the medium to be released into the venting system during replacement of the inlet pipeline, the compression equipment, and the outlet pipeline, thus meeting the closed-loop emission requirements of the chemical plant. The safety valve venting pipeline is equipped with a manually shut-off venting valve two, which is connected to the outlet of each safety valve one. This facilitates the switching operation of the safety valves and the verification and disassembly operation of the safety valves two.

[0033] After adopting the above technical solution, the beneficial effects of the present invention are as follows: it achieves the purpose of returning the desorbed gas to the raw material gas system for re-adsorption and purification, improves the utilization value of the desorbed gas, increases the yield of product hydrogen, and reduces the production cost of product hydrogen.

[0034] In addition, the present invention has advantages such as small footprint, flexible implementation scale, low investment, and simple and convenient operation. These advantages are conducive to the large-scale promotion of the present invention and promote the development of hydrogen energy application.

[0035] Furthermore, this invention improves hydrogen production and reduces hydrogen production costs for all devices that generate hydrogen-containing desorbed gas. Based on industrial operation experience, the higher the hydrogen content in the desorbed gas, the better the cost-effectiveness. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the production process of the present invention.

[0037] The components include: 1. Manual valve; 2. Inlet pneumatic shut-off valve; 3. Inlet pneumatic regulating valve; 4. Inlet filter; 5. Pressure transmitter one; 6. Pressure gauge one; 7. Pressure transmitter two; 8. Safety valve one; 9. Manual shut-off valve one; 10. Manual shut-off valve two; 11. Compression equipment; 12. Pneumatic regulating valve; 13. Manual shut-off valve (Sabi); 14. Check valve; 15. Manual shut-off valve three; 16. Flow meter; 17. Outlet pneumatic regulating valve; 18. Pressure transmitter three; 19. Pressure gauge two; 20. Safety valve two; 21. Manual shut-off valve four; 22. Nitrogen main pipe manual valve. 23. Nitrogen main pipe flow meter; 24. Nitrogen main pipe pressure transmitter; 25. Nitrogen main pipe pressure gauge; 26. Nitrogen main pipe manual shut-off valve 2; 27. Nitrogen branch pipe outlet manual shut-off valve; 28. Nitrogen branch pipe outlet manual shut-off valve; 29. ​​Nitrogen branch pipe outlet manual shut-off valve; 30. Nitrogen branch pipe outlet manual shut-off valve; 31. Nitrogen branch pipe outlet manual shut-off valve; 32. Nitrogen branch pipe outlet manual shut-off valve; 33. Nitrogen branch pipe outlet manual shut-off valve; 34. Nitrogen branch pipe outlet manual shut-off valve; 35. Nitrogen branch pipe outlet manual shut-off valve; 36. Nitrogen 37. Nitrogen branch pipe check valve; 38. Nitrogen branch pipe check valve; 39. Nitrogen hose; 40. Nitrogen hose; 41. Instrument main air duct manual shut-off valve one; 42. Instrument main air duct flow meter; 43. Instrument main air duct pressure transmitter; 44. Instrument main air duct pressure gauge; 45. Instrument main air duct manual shut-off valve two; 46. Instrument branch pipe outlet manual shut-off valve; 47. Instrument branch pipe outlet manual shut-off valve; 48. Instrument branch pipe outlet manual shut-off valve; 49. Instrument branch pipe outlet manual shut-off valve; 50. Cooling water inlet manual shut-off valve; 51. Cooling 52. Manual shut-off valve for water inlet; 53. Manual shut-off valve for cooling water return; 54. Sight glass for cooling water return; 55. Manual shut-off valve for cooling water return; 56. Cooling water return flow meter; 57. Manual shut-off vent valve one; 58. Manual shut-off vent valve one; 59. Manual shut-off vent valve two; 60. Manual shut-off vent valve one; 61. Manual shut-off vent valve one; 62. Manual shut-off vent valve two; 63. Manual shut-off vent valve one; 64. Manual shut-off vent valve one; 65. Temperature transmitter for air inlet pipeline; 66. Temperature transmitter for air outlet pipeline. Detailed Implementation

[0038] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] Example 1:

[0040] To address the problems of high hydrogen content in existing desorbed gas, low added value of desorbed gas, and high hydrogen production costs in industrial hydrogen production of high-purity hydrogen, this invention provides a process method for improving the yield of high-purity hydrogen in industrial hydrogen production. This method enables the reuse of hydrogen in the desorbed gas, increases the added value of the desorbed gas, and reduces hydrogen production costs. Furthermore, by incorporating mature domestic compression equipment manufacturing technology, it is beneficial for controlling the construction costs of this invention. The desorbed gas intake point in this invention is the original desorbed gas buffer tank, which facilitates automated pressure control of the desorbed gas buffer tank after its implementation.

[0041] Figure 1 The diagram schematically illustrates a process method for improving the yield of high-purity hydrogen in industrial hydrogen production according to the present invention. The process method for improving the yield of high-purity hydrogen in industrial hydrogen production includes an inlet pipeline, a compression device, an outlet pipeline, a nitrogen pipeline, an instrument air pipeline, a cooling water pipeline, a vent pipeline, and a PLC control system.

[0042] The inlet of the gas inlet is connected to the desorbed gas buffer tank, and the outlet is connected to the compression equipment. The outlet of the compression equipment is connected to the outlet gas inlet, and the outlet gas inlet is connected to the original raw material gas inlet. This allows the desorbed gas to be pressurized and mixed with the original raw material gas before entering the hydrogen preparation and purification unit, thereby achieving the purpose of recovering hydrogen from the desorbed gas and improving the hydrogen yield.

[0043] All of the aforementioned air inlet pipelines, compression equipment, and air outlet pipelines are equipped with pressure transmitters.

[0044] The nitrogen pipeline inlet is connected to the original nitrogen main pipeline, and the outlet is connected to each nitrogen branch pipeline.

[0045] The instrument air pipeline inlet is connected to the original instrument air main pipe, and the outlet is connected to each instrument air branch pipe.

[0046] The displacement venting and safety valve venting on the intake pipeline, the venting of the compressor body, and the displacement venting and safety valve venting on the outlet pipeline are all connected to the original venting system, realizing closed venting of the intake pipeline, compressor, and outlet pipeline, which meets environmental protection requirements.

[0047] In one embodiment, during the process of drawing nitrogen from the main nitrogen pipe to each branch pipe, the main nitrogen pipe manual shut-off valve 1 (22) and the main nitrogen pipe manual shut-off valve 26 (26) must be opened sequentially. The valves must be opened slowly and smoothly to avoid fluctuations in the main nitrogen pipe pressure. Once the pressure reaches a certain value, the branch pipe manual shut-off valve 29 is opened to purge and replace the air in the main nitrogen pipe with nitrogen, ensuring that the nitrogen used in each branch pipe meets the usage requirements.

[0048] In one embodiment, during the process of drawing instrument air from the main instrument air duct to each branch duct, the manual shut-off valve 41 and the manual shut-off valve 45 of the main instrument air duct must be opened sequentially. The valves must be opened slowly and smoothly to avoid pressure fluctuations in the main instrument air duct. Once the pressure reaches a certain value, the manual shut-off valve 49 of the branch instrument air duct is opened to purge the main instrument air duct, removing impurities and ensuring that the cleanliness of the instrument air used in each branch duct meets the usage requirements.

[0049] In one embodiment, during the process of drawing water into the cooling water inlet pipeline, the manual shut-off valves 50 and 51 of the cooling water inlet pipeline need to be opened in sequence. Before entering the compression equipment 11, the pipeline connection is disconnected, and the cooling water inlet pipeline is flushed with cooling water to clean the debris in the cooling water inlet pipeline and prevent the debris from entering the compression equipment and affecting the operation of the compression equipment.

[0050] After the cooling water inlet pipeline is flushed to the required standard, connect the compressor 11 and simultaneously open the manual shut-off valves 52, 54, and 56 of the cooling water return pipeline. Confirm that the cooling water pipeline is unobstructed according to the display of the cooling water return sight glass 53.

[0051] In one embodiment, during the nitrogen purging process of the intake pipeline, the manual shut-off valves 27, 30, and 31 of the nitrogen branch pipe are opened, and the nitrogen hose 39 is connected to purge the intake pipeline with nitrogen. When the pressure reaches a certain value, the manual shut-off valve 30 of the nitrogen branch pipe is closed, and the purging valves 57 and 58 are opened to begin venting. When the pressure drops to a certain value, one purging cycle is complete. Pipelines initially put into use generally require 3-6 purging cycles. The final number of purging cycles is determined by the oxygen content (<0.5%) of the gas medium in the intake pipeline; meeting this requirement is considered a successful purging.

[0052] In one embodiment, during the nitrogen purging process of the compression equipment, the manual shut-off valves 28, 32, and 33 of the nitrogen branch pipe are opened to purge the compression equipment with nitrogen. When the pressure reaches a certain value, the manual shut-off valve 33 of the nitrogen branch pipe is closed, and the purging vent valves 60 and 61 are opened to begin venting. When the pressure drops to a certain value, one purging cycle is completed. Compression equipment initially put into use generally requires 3-6 purging cycles. The final number of purging cycles is determined by the oxygen content index (<0.5%) of the gas medium in the compression equipment; meeting this index is considered a successful purging.

[0053] In one embodiment, during nitrogen purging of the outlet pipeline, the manual shut-off valves 29, 34, and 35 of the nitrogen branch pipe are opened, and the nitrogen hose 40 is connected to purge the outlet pipeline with nitrogen. When the pressure reaches a certain value, the manual shut-off valve 34 of the nitrogen branch pipe is closed, and the purging valves 63 and 64 are opened to begin venting. When the pressure drops to a certain value, one purging cycle is complete. Pipelines initially put into use generally require 3-6 purging cycles. The final number of purging cycles is determined by the oxygen content (<0.5%) in the gas medium of the inlet pipeline; meeting this requirement is considered a successful purging.

[0054] In one embodiment, the replacement of the venting pipeline and the safety valve venting pipeline is generally carried out together with the nitrogen replacement of the above-mentioned inlet pipeline, compression equipment and outlet pipeline. This reduces the amount of nitrogen consumed during nitrogen replacement and also confirms whether the process flow is unobstructed.

[0055] In one embodiment, first confirm that the pressure of the desorption gas buffer tank is stable. Then, open manual valve 1, and use the PLC control system to open pneumatic shut-off valve 2 and pneumatic regulating valve 3 to introduce desorption gas to the compressor 11. After the pressure rises to a certain value, open the displacement venting manual shut-off valves 57 and 58 to displace the desorption gas in the inlet pipeline, generally 3-6 times. After the inlet pipeline is purged, open the second manual shut-off valve 10 to introduce desorption gas into the compressor 11. After the pressure rises to a certain value, open the first displacement venting manual shut-off valves 60 and 61 to displace the desorption gas in the compressor, generally 3-6 times. After the compressor 11 is purged, open the third manual shut-off valves 13 and 15 to introduce desorption gas into the outlet pipeline. After the pressure rises to a certain value, open the first displacement venting manual shut-off valves 63 and 64 to displace the desorption gas in the outlet pipeline, generally 3-6 times.

[0056] In one embodiment, to start the compressor 11, the reflux regulating valve 12 must first be fully opened using the control system. After confirming that the water, electricity, and gas supply to the compressor are all operational, the compressor 11 is started. After the compressor runs under no-load for 5-10 minutes without any abnormalities, the load on the compressor is adjusted using its built-in load regulator. After the load adjustment is complete, the reflux regulating valve 12 is slowly closed using the PLC control system. As the reflux regulating valve 12 slowly closes, the outlet pressure of the compressor 11 slowly rises. When the pressure transmitter 18 displays a value sufficient for the desorbed gas to be incorporated into the raw material gas pipeline, the outlet pipeline pneumatic regulating valve 17 is slowly opened using the control system. As the outlet pipeline pneumatic regulating valve 17 slowly opens, the outlet pipeline flow meter 16 displays the amount of desorbed gas in real time. The appropriate flow rate can then be adjusted using the outlet pipeline pneumatic regulating valve 17 as needed.

[0057] In one embodiment, during normal operation, the exhaust pressure of the compression device 11 is controlled by adjusting the reflux regulating valve 12, the opening of the outlet pipeline pneumatic regulating valve 17 is adjusted, and the amount of desorbed gas entering the raw material gas pipeline is adjusted. The amount of desorbed gas entering the raw material gas pipeline is displayed in real time by the outlet pipeline flow meter 16.

[0058] In addition, a flame arrester is installed on the venting pipeline. Since the desorbed gas contains hydrogen, which is a flammable gas, the flame arrester can prevent the desorbed gas from burning and causing a fire or explosion when venting the desorbed gas, thus ensuring safety.

[0059] According to the process method for improving the yield of high-purity hydrogen in industrial hydrogen production described in this embodiment, the nitrogen replacement and desorption gas replacement in the desorption gas recovery and reuse process are standardized. As can be seen from this embodiment, the process flow of the present invention is simple, with fewer real-time variables and simple operation adjustment. Compared with the existing process, it can significantly reduce manual configuration and improve the overall safety and reliability of the desorption gas recovery and reuse operation.

[0060] The present invention and its embodiments have been described above. This description is not restrictive, and the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and, without departing from the spirit of the invention, design similar structures and embodiments without creative effort, all such designs should fall within the protection scope of the present invention.

Claims

1. A process for improving the yield of high-purity hydrogen in industrial hydrogen production, comprising an inlet pipeline, a compression device, an outlet pipeline, a nitrogen pipeline, an instrument air pipeline, a cooling water pipeline, a vent pipeline, and a PLC control system; the PLC control system controls the opening and closing of valves on the inlet and outlet pipelines and the logic control of the compression device; the control system controls the load by controlling the opening and closing of valves on the pipelines, ensuring that the hydrogen yield is improved without affecting the operation of the original unit; the inlet of the inlet pipeline is connected to the desorption gas buffer tank of the original unit, characterized in that: The intake pipeline is equipped with a manual valve (1), an intake pneumatic shut-off valve (2), an intake pneumatic regulating valve (3), an intake filter (4), a pressure transmitter (5), a pressure gauge (6), a pressure transmitter (7), an intake pipeline temperature transmitter (65), a safety valve (8), a manual shut-off valve (9), and a manual shut-off valve (10). Among them, the intake pneumatic shut-off valve (2) serves as an interlock protection, and will be shut off when the compression equipment fails. The intake pneumatic regulating valve (3) is controlled by the PLC control system to control the desorbed gas recovery flow rate. The pressure transmitter (5) and the pressure transmitter (7) are positioned before and after the intake filter (4) and perform differential pressure calculation and display in the PLC control system to ensure that the working condition of the intake filter (4) meets the usage requirements.

2. The process method for improving the yield of high-purity hydrogen in industrial hydrogen production according to claim 1, characterized in that: The compressor (11) is connected to the air inlet pipeline at its inlet. The compressor (11) is equipped with multiple pressure and temperature alarms and interlocks to ensure the normal operation of the compressor. The compressor (11) is equipped with a pneumatic regulating valve (12) at its outlet. The pneumatic regulating valve (12) is a reflux regulating valve for the compressor. The outlet of the reflux regulating valve is connected to the air inlet pipeline. Its purpose is to control the exhaust pressure at the outlet of the compressor and ensure the normal start-up and shutdown of the compressor.

3. The process method for improving the yield of high-purity hydrogen in industrial hydrogen production according to claim 1, characterized in that: The outlet pipeline is connected to the outlet of the compression equipment (11). The outlet pipeline is equipped with a check valve (14), a manual shut-off valve three (13, 15), a flow meter (16), an outlet pneumatic regulating valve (17), a pressure transmitter three (18), an outlet pipeline temperature transmitter (66), a pressure gauge two (19), a safety valve two (20), and a manual shut-off valve four (21). The PLC control system controls the pressure of the desorbed gas entering the raw material gas through the outlet pneumatic regulating valve (17) to ensure that the pressure of the desorbed gas entering the raw material gas pipeline is stable.

4. The process method for improving the yield of high-purity hydrogen in industrial hydrogen production according to claim 1, characterized in that: The nitrogen pipeline is equipped with a nitrogen main manual shut-off valve one (22), a nitrogen main flow meter (23), a nitrogen main pressure transmitter (24), a nitrogen main pressure gauge (25), a nitrogen main manual shut-off valve two (26), nitrogen branch outlet manual shut-off valves (27, 28, 29, 30, 31, 32, 33, 34, 35) and nitrogen branch check valves (36, 37, 38); nitrogen branch outlet manual shut-off valves (27, 29) are followed by nitrogen hoses (39, 40); nitrogen branch outlet manual shut-off valves (27, 28, 29) control the amount of nitrogen used at each gas point; nitrogen branch check valves (36, 37, 38) and nitrogen hoses (39, 40) are all installed to prevent the transfer of media.

5. The process method for improving the yield of high-purity hydrogen in industrial hydrogen production according to claim 1, characterized in that: The instrument air duct is equipped with a manual shut-off valve 1 (41) for the main instrument air duct, a flow meter for the main instrument air duct, a pressure transmitter for the main instrument air duct, a pressure gauge for the main instrument air duct, a manual shut-off valve 2 (45) for the main instrument air duct, and manual shut-off valves (46, 47, 48, 49) for the outlet of the instrument air duct; the manual shut-off valves (46, 47, 48, 49) for the outlet of the instrument air duct control the amount of instrument air used at each gas consumption point.

6. The process method for improving the yield of high-purity hydrogen in industrial hydrogen production according to claim 1, characterized in that: The cooling water pipeline is divided into a cooling water inlet pipeline and a cooling water return pipeline, which are used for cooling the compressor (11). It is also equipped with a cooling water inlet manual shut-off valve (50, 51), a cooling water return sight glass (53), a cooling water return manual shut-off valve (52, 54, 56), and a cooling water return flow meter (55). The cooling water return manual shut-off valve (56) controls the amount of cooling water used by the compressor (11).

7. The process method for improving the yield of high-purity hydrogen in industrial hydrogen production according to claim 1, characterized in that: The venting pipeline includes a displacement venting pipeline and a safety valve venting pipeline. The displacement venting pipeline is equipped with a manual shut-off venting valve one (57, 58, 60, 61, 63, 64); the safety valve venting pipeline is equipped with a manual shut-off venting valve two (59, 62); the manual shut-off venting valve two (59) is connected to the outlet of the safety valve one (8), and the manual shut-off venting valve two (62) is connected to the outlet of the safety valve two (20).

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