A hydrogen test center for high-pressure compressor and a test method

Abstract

The application discloses a kind of high-pressure compressor hydrogen test center and test method, test center includes the air release column of connecting test gas source, valve group one includes direct supply circuit, air release column is connected to the hydrogen inlet of direct supply circuit, the hydrogen outlet of direct supply circuit is connected to the gas inlet of hydrogen bottle group one by pipeline and valve group two, hydrogen bottle group one includes multiple hydrogen cylinders and hydrogen storage control pipeline system, the gas outlet of hydrogen bottle group one is connected to the gas intake main pipe of high-pressure test station, gas intake main pipe is connected to the gas inlet of each compressor to be measured in high-pressure test station by branch pipe in correspondence, the gas outlet of each compressor to be measured is connected to the gas outlet main pipe by pipeline, gas outlet main pipe is connected to the gas inlet of hydrogen bottle group two by valve group four, the gas outlet of hydrogen bottle group two is connected to gas intake main pipe.The application can realize the integration of high-pressure compressor test process, facilitate test process automation operation, so that test hydrogen can be recycled and utilized, avoid the waste of test gas.

Description

Technical Field

[0001] This invention belongs to the field of compressor testing technology, and relates to a high-pressure compressor hydrogen testing center and testing method. Background Technology

[0002] Currently, most hydrogen refueling stations use long-tube trailers as their external hydrogen supply source. The supply pressure from these trailers is typically 20 MPa, lower than the refueling pressure required by the stations. The hydrogen needs to be pressurized by a compressor and stored in the station's tanks. Since higher pressure reduces overall hydrogen usage costs, 90 MPa hydrogen compressors are currently the mainstream high-pressure hydrogen compressor model used in refueling stations. The compressor is one of the core pieces of equipment in a hydrogen refueling station, and its pre-shipment testing is crucial for ensuring the station's reliability and safety.

[0003] Current testing of diaphragm compressors often uses nitrogen as a substitute for hydrogen, which introduces certain errors and cannot effectively test the performance parameters of the diaphragm compressor.

[0004] On the other hand, bottled gas is often used for the gas supply during the commissioning of diaphragm compressors. The gas pressure is often customized and decreases continuously as the gas volume decreases. It is impossible to flexibly adjust the gas supply pressure and maintain a stable pressure of 90MPa. At the same time, using bottled gas is not conducive to hydrogen recovery and further automation testing. Summary of the Invention

[0005] The purpose of this invention is to provide a high-pressure compressor hydrogen testing center to solve the technical problems in the prior art of effectively automating the testing of compressors at hydrogen refueling stations and ensuring flexible and stable gas supply pressure during testing.

[0006] The high-pressure compressor hydrogen testing center includes a vent column connected to a test gas source, valve group one, valve group two, hydrogen storage cylinder group one, hydrogen storage cylinder group two, valve group three, valve group four, valve group five, and a high-pressure testing station. Valve group one includes a direct supply circuit. The vent column is connected to the hydrogen inlet of the direct supply circuit. The hydrogen outlet of the direct supply circuit is connected to the inlet of hydrogen storage cylinder group one via a pipeline and valve group two. Hydrogen storage cylinder group one includes multiple hydrogen cylinders and a hydrogen storage control pipeline system. Hydrogen storage cylinder group one is connected to the hydrogen storage control pipeline... The amount of hydrogen stored for testing is changed by opening and closing valves on different pipelines in the system. The outlet of the hydrogen storage cylinder group one is connected to the main inlet pipe of the high-pressure test station through pipelines and valve group three. The main inlet pipe is then connected to the inlet of each compressor under test in the high-pressure test station through branch pipes. The outlet of each compressor under test is connected to the main outlet pipe through pipelines. The main outlet pipe is connected to the inlet of the hydrogen storage cylinder group two through valve group four. The outlet of the hydrogen storage cylinder group two is connected to the main inlet pipe through valve group five and pipelines.

[0007] Preferably, the venting column is connected to two hydrogen supply lines, namely line one and line two. Line one is directly connected to one hydrogen inlet of the direct supply circuit; line two is connected to the other hydrogen inlet of the direct supply circuit via a hydrogen compressor.

[0008] Preferably, the hydrogen storage cylinder group one includes several cylinder circuits arranged in parallel, and each cylinder circuit is horizontally connected between the valve group two and the valve group three. Each cylinder circuit is equipped with a corresponding hydrogen cylinder and a circuit control structure. The hydrogen storage control pipeline system includes the circuit control structure, and the circuit control structure includes a safety valve, which is located on the pipeline of the cylinder circuit.

[0009] Preferably, the gas cylinder circuit includes a single-cylinder circuit and a multi-cylinder circuit. The single-cylinder circuit contains only one hydrogen cylinder, and the multi-cylinder circuit includes a parallel cylinder group formed by connecting several hydrogen cylinders in parallel. The parallel cylinder group is connected to the pipeline of the gas cylinder circuit. The circuit control structure includes a first control structure and a second control structure disposed on the pipeline of the gas cylinder circuit, and control valves disposed on the pipelines at both ends of each hydrogen cylinder. In the single-cylinder circuit, both the hydrogen cylinder and the control valve are disposed between the first control structure and the second control structure. In the multi-cylinder circuit, the parallel cylinder group is disposed between the first control structure and the second control structure, and the control valve is disposed on the pipelines at both ends of each hydrogen cylinder in the parallel cylinder group.

[0010] Preferably, the valve group four includes a ventilation circuit, and the main outlet pipe is connected to the gas cylinder circuit in the hydrogen storage cylinder group two through the ventilation circuit. The circulating gas path includes a pressure reducing branch and an outlet branch connected to the corresponding outlet. The outlet branch does not undergo pressure reduction and is connected to the main inlet pipe of the high-pressure test station through circulating pipeline one. The pressure reducing branch is equipped with a pressure reducing valve and is connected to the inlet of valve group two through circulating pipeline two. Of the two inlets of valve group two, one is connected to circulating pipeline two, and the other is connected to the direct supply circuit.

[0011] Preferably, the ventilation circuit in the fourth valve assembly further includes a pressure-reducing circulation branch, which is equipped with a pressure-reducing valve. The pressure-reducing circulation branch is connected to an outlet of the fourth valve assembly, and the pressure-reducing circulation branch is connected to the first circulation pipeline via the outlet and a pipeline.

[0012] This invention also provides a method for testing hydrogen in a high-pressure compressor, employing a high-pressure compressor hydrogen testing center as described above. The testing method includes: after hydrogen flows out from the venting column, it passes through pipeline one, then through the direct supply circuit of valve group one, and valve group two, entering hydrogen storage cylinder group one. Hydrogen storage cylinder group one stably supplies hydrogen externally. After passing through valve group three, the hydrogen is delivered to the high-pressure testing station to supply the high-pressure compressor for testing. The compressor under test then delivers the tested hydrogen to hydrogen storage cylinder group two via valve group four. The hydrogen in hydrogen storage cylinder group two, after passing through valve group five, can be circulated to the high-pressure testing station via the circulation pipeline one, and can also be circulated to hydrogen storage cylinder group one via the circulation pipeline two and valve group two for storage. The venting circuit on valve group four can also be connected to pipeline eleven via a pressure-reducing circulation branch. The circulation pipeline two delivers pressure-reduced hydrogen to hydrogen storage cylinder group one for storage.

[0013] Preferably, when the gas supply pressure is close to the pressure required for the test, the hydrogen flows out from the vent column and is then transported by pipeline one through the direct supply circuit of valve group one; when the gas supply pressure is lower than the pressure required for the test, the hydrogen flows out from the vent column and is then transported by pipeline two through the hydrogen compressor for pressurization, and then transported through the direct supply circuit of valve group one.

[0014] Preferably, when the hydrogen supply in the testing system reaches the required level, pipelines one and two are closed. The compressor under test at the high-pressure testing station provides the power for hydrogen circulation, and the compressor under test then delivers the tested hydrogen to hydrogen storage cylinder group two via valve group four. The hydrogen in hydrogen storage cylinder group two, after passing through valve group five, can be circulated to the high-pressure testing station via the first circulation pipeline, or circulated to hydrogen storage cylinder group one via the second circulation pipeline and valve group two for storage. The venting circuit on valve group four can also be connected to pipeline eleven via a pressure-reducing circulation branch, and the second circulation pipeline delivers pressure-reduced hydrogen to hydrogen storage cylinder group one for storage.

[0015] Preferably, when the high supply pressure of hydrogen in some gas cylinder circuits in the second hydrogen storage cylinder group is too high and cannot meet the requirement that the inlet pressure of the hydrogen compressor is lower than the exhaust pressure, the hydrogen is depressurized by the pressure reducing valve in the pressure reducing branch of valve group five or the pressure reducing circulation branch of valve group four before being delivered to the first hydrogen storage cylinder group, which then supplies gas to the high pressure test station.

[0016] When the hydrogen supply pressure is too high, and the pressure cannot be reduced to the required value after the pressure reducing valve is used, a portion of the hydrogen will be discharged through the circulating gas path and the vent in the second hydrogen storage cylinder group, thereby protecting the compressor under test in the high-pressure compressor test station.

[0017] This invention has the following advantages: This solution supplies gas directly from the long-tube trailer via a venting column, thus ensuring a consistent gas supply and avoiding insufficient supply issues. The integration of valves required for testing processes using medium-pressure compressors such as hydrogen compressors through valve group configurations facilitates test process operation. The hydrogen storage cylinder group design enhances the safety and flexibility of internal gas circulation, and the loop formed by the connections between valve groups ensures the circulation of hydrogen for testing, preventing gas waste.

[0018] In this design, the inlet and outlet pressures can be adjusted through a control structure to ensure the safety of the hydrogen storage tank assembly and that the supply pressure meets requirements. This design stores hydrogen gas with a lower supply pressure from the long-tube trailer into cylinders. A hydrogen compressor increases the pressure of the hydrogen stored in the storage tank assembly, while the parallel cylinder circuit ensures a stable and reliable test supply. The structure of this design can also simultaneously meet the testing requirements of two or more compressors under test. The combination of hydrogen compressor pressurization and the hydrogen storage tank assembly allows for the supply of various pressures, thus broadening the application range of this testing process, meeting the testing requirements of hydrogen compressors with various inlet and outlet pressure parameters, and improving the versatility of the testing equipment.

[0019] The hydrogen storage cylinder group 1 can provide the hydrogen pressure required by the 90MPa compressor, and the recovered hydrogen can be stored in each hydrogen storage cylinder group, or it can be stored in the corresponding hydrogen storage cylinder group after pressure reduction; if there is hydrogen with a higher storage pressure in the hydrogen storage cylinder group, the pressure reduction and venting protection of the hydrogen can be achieved through its own structure and the pressure reducing valves and venting ports of valve group 5, valve group 4, etc., so as to avoid the test results being affected by the hydrogen supply pressure being too high or too low. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a high-pressure compressor hydrogen testing center according to the present invention.

[0021] Figure 2 for Figure 1 The diagram shows the structure of the vent column.

[0022] Figure 3 for Figure 1 The diagram shows the structure of the hydrogen compressor.

[0023] Figure 4 for Figure 1 The diagram shows the structure of hydrogen storage cylinder group one.

[0024] Figure 5 for Figure 1 The diagram shows the structure of valve group one in the structure shown.

[0025] Figure 6 for Figure 1 The diagram shows the structure of valve group two in the structure shown.

[0026] Figure 7 For Figure 1 The diagram shows the structure of valve group three.

[0027] Figure 8 for Figure 1 The diagram shows the structure of valve group four.

[0028] Figure 9 for Figure 1 The diagram shows the structure of hydrogen storage cylinder group two.

[0029] Figure 10 for Figure 1 The diagram shows the structure of valve group five in the structure shown.

[0030] Figure 11 for Figure 8 and Figure 10 The diagram shows the structural schematic of the pressure reducing valve section.

[0031] The reference numerals in the attached diagram include: 1. Long-tube trailer; 2. Venting column; 3. Hydrogen compressor; 4. Valve assembly 1; 5. Valve assembly 2; 6. Hydrogen storage cylinder assembly 1; 7. Valve assembly 3; 8. High-pressure test station; 9. Compressor under test; 10. Valve assembly 4; 11. Hydrogen storage cylinder assembly 2; 12. Valve assembly 5; 13. Pipeline 1; 14. Pipeline 2; 15. Pipeline 3; 16. Pipeline 4; 17. Pipeline 5; 18. Pipeline 6; 19. Pipeline 7; 20. Pipeline 8; 21. Pipeline 9; 22. Hydrogen vent; 23. Circulation pipeline 1; 24. Pipeline 11; 25. Circulation pipeline 2; 26. Pipeline 13; 27. Replacement pipeline. Detailed Implementation

[0032] The following detailed description of the embodiments, with reference to the accompanying drawings, will further illustrate the specific implementation of the present invention, in order to help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of the present invention.

[0033] like Figure 1-11As shown, this invention discloses a high-pressure compressor hydrogen testing center, including a venting column 2 connected to a test gas source, valve group one 4, valve group two 5, hydrogen storage cylinder group one 6, hydrogen storage cylinder group two 11, valve group three 7, valve group four 10, valve group five 12, and a high-pressure testing station 8. Valve group one 4 includes a direct supply circuit, and the venting column 2 is connected to the hydrogen inlet of the direct supply circuit. The hydrogen outlet of the direct supply circuit is connected to the inlet of the hydrogen storage cylinder group one 6 via a pipeline and valve group two 5. The hydrogen storage cylinder group one 6 includes multiple hydrogen cylinders and a hydrogen storage control pipeline system. The hydrogen storage cylinder group one 6 is connected to the hydrogen storage cylinder group one 6 via the gas source. The amount of hydrogen stored for testing is changed by opening and closing valves in different pipelines in the hydrogen control pipeline system. The outlet of the hydrogen storage cylinder group 1 6 is connected to the main inlet pipe of the high-pressure test station 8 through pipelines and valve group 3 7. The main inlet pipe is then connected to the inlet of each compressor 9 under test in the high-pressure test station 8 through branch pipes. The outlet of each compressor 9 under test is connected to the main outlet pipe through pipelines. The main outlet pipe is connected to the inlet of the hydrogen storage cylinder group 2 11 through valve group 4 10. The outlet of the hydrogen storage cylinder group 2 11 is connected to the main inlet pipe through valve group 5 12 and pipelines.

[0034] This solution supplies gas directly from the long-tube trailer 1 via the venting column 2, ensuring a consistent gas supply and preventing insufficient supply issues. The valve assembly integrates the valves required for testing commonly used high-pressure compressors like the 90MPa compressor, facilitating test operation. The hydrogen storage cylinder design enhances the safety and flexibility of internal gas circulation, and the parallel connection of multiple cylinder circuits improves supply stability. The valve assembly connections form a loop leading to the high-pressure test station 8, allowing for the recycling of hydrogen used in testing and preventing gas waste.

[0035] The venting column 2 is connected to two hydrogen supply lines, namely line 13 and line 14. Line 13 is directly connected to one hydrogen inlet of the direct supply circuit, hence it is a direct supply line. Line 14 is connected to the other hydrogen inlet of the direct supply circuit via the hydrogen compressor 3, hence it is a pressurization line. The direct supply circuit has two inlet branches and one outlet branch corresponding to the hydrogen inlets. This allows the solution to achieve multiple supply pressures by adding the hydrogen compressor 3 to the testing process, thereby broadening the application range of the testing process, meeting the testing requirements of the hydrogen compressor 3 for various inlet and outlet pressure parameters, and improving the versatility of the testing equipment.

[0036] The hydrogen storage cylinder group 6 is equipped with multiple valves, including safety valves and needle valves, to ensure the safety of the hydrogen supply. The amount of hydrogen stored for testing can be changed by opening and closing valves in different pipelines, flexibly adjusting the hydrogen circulation rate to meet the testing requirements of hydrogen compressors 3 with different displacements. The hydrogen storage cylinder group 6 includes several gas cylinder circuits arranged in parallel. Each gas cylinder circuit is horizontally connected between valve group 5 and valve group 7. Each gas cylinder circuit has a corresponding hydrogen cylinder and a circuit control structure. The hydrogen storage control pipeline system includes the circuit control structure, which includes several safety valves, such as safety valves and needle valves, located on the gas cylinder circuit pipelines.

[0037] The gas cylinder circuit includes a single-cylinder circuit and a multi-cylinder circuit. The single-cylinder circuit contains only one hydrogen cylinder, while the multi-cylinder circuit includes a parallel cylinder group formed by connecting several hydrogen cylinders in parallel. The parallel cylinder group is connected to the pipeline of the gas cylinder circuit. The circuit control structure includes a first control structure and a second control structure located on the pipeline of the gas cylinder circuit, and control valves located on the pipelines at both ends of each hydrogen cylinder. In the single-cylinder circuit, both the hydrogen cylinder and the control valve are located between the first control structure and the second control structure; in the multi-cylinder circuit, the parallel cylinder group is located between the first control structure and the second control structure, and the control valve is located on the pipelines at both ends of each hydrogen cylinder in the parallel cylinder group. The control structure allows for adjustment of the inlet and outlet pressures, ensuring the safety of the hydrogen storage cylinder group 6 and that the supply pressure meets requirements.

[0038] The direct supply circuit of valve group 4 is connected to the circuit in valve group 5, and the outlet of the circuit is connected to a gas cylinder circuit in hydrogen storage cylinder group 6. The gas cylinder circuit can be a multi-cylinder circuit or a single-cylinder circuit. The direct supply circuit of valve group 4 is connected to the inlet of valve group 5. Hydrogen is supplied and stored in hydrogen storage cylinder group 6 before being delivered to the high-pressure test station 8. Hydrogen stored in hydrogen storage cylinder group 6 is supplied to the compressor under test 9 through valve group 3 to ensure a stable gas supply.

[0039] The valve group 3 7 has an independent circuit, and each circuit is equipped with a corresponding valve and other control structure. The gas cylinder circuit in the hydrogen storage cylinder group 1 6 is connected to the corresponding gas outlet through the circuit in the valve group 3 7. Each gas outlet of the valve group 3 7 is connected to the main gas inlet pipe of the high-pressure test station 8 through a branch pipe. The above-mentioned branch pipe, main gas inlet pipe and branch pipe in the high-pressure test station 8 constitute pipeline 6 18, which is used to supply hydrogen to each compressor 9 under test.

[0040] The valve group four 10 includes a ventilation circuit. The main outlet pipe is connected to the gas cylinder circuit in the hydrogen storage cylinder group two 11 through the ventilation circuit. The gas cylinder circuit is connected to the circulating gas path in the valve group five 12. The circulating gas path includes a pressure reducing branch and an outlet branch connected to the corresponding outlet. The outlet branch does not reduce pressure and is connected to the main inlet pipe of the high-pressure test station 8 through the first circulating pipe 23, realizing the recycling of gas and directly supplying gas to the compressor 9 under test. The pressure reducing branch is equipped with a pressure reducing valve and is connected to the inlet of the valve group two 5 through the second circulating pipe 25, so that the hydrogen in the hydrogen storage cylinder group two 11 can be depressurized by the valve group five 12 and then circulated to the hydrogen storage cylinder group one 6 for storage. One of the two inlets of the valve group two 5 is connected to the second circulating pipe 25, and the other is connected to the direct supply circuit. Each gas cylinder circuit of the hydrogen storage cylinder group two 11 can also release hydrogen through its hydrogen vent 22 to reduce the gas pressure.

[0041] The ventilation circuit in valve group four 10 also includes a pressure-reducing circulation branch, which is equipped with a pressure-reducing valve. The pressure-reducing circulation branch is connected to one of the outlets of valve group four 10, and is connected to the circulation pipeline one 23 via the outlet and a pipeline. In this way, the hydrogen received by valve group four 10 can be directly circulated to the hydrogen storage cylinder group one 6 for storage after being reduced in pressure by the pressure-reducing valve of the pressure-reducing circulation branch.

[0042] Using the aforementioned high-pressure compressor hydrogen testing center, the long-tube trailer 1 is connected to the venting column 2 to directly provide the test gas source. Pipeline 13 of the venting column 2 is connected to valve group 4, and pipeline 14 of the venting column 2 is connected to the hydrogen compressor 3. The outlet of the hydrogen compressor 3 is connected to valve group 4. Pipeline 15 of valve group 4 is connected to valve group 5. Valve group 5 is connected to hydrogen storage cylinder group 6 via pipeline 16. Hydrogen storage cylinder group 6 is connected to valve group 7 via pipeline 17. The outlet of valve group 7 is connected to pipeline 18, and then to each compressor 9 under test at the high-pressure testing station 8 via pipeline 18 and its branch pipes. All compressors under test 9 are high-pressure compressors (i.e., 90MPa compressors). The outlet of each compressor under test 9 is connected in parallel to pipeline 7 19 via corresponding branch pipes. Pipeline 7 19 is connected to the ventilation circuit of valve group 4 10. The ventilation circuit is then connected to the corresponding gas cylinder circuit in hydrogen storage cylinder group 2 11 via pipeline 8 20. The gas cylinder circuit is connected to the circulation gas circuit in valve group 5 12 via pipeline 9 21. The outlet branch of the circulation gas circuit is connected to pipeline 6 18 via pipeline 10 (i.e., circulation pipeline 1 23), which is connected to the main inlet pipe of the high-pressure test station 8, thereby realizing the circulation gas supply to the high-pressure test station 8. The pressure reducing branch of the circulation gas circuit is connected to another inlet of valve group 2 5 via pipeline 12 (i.e., circulation pipeline 2 25), thereby supplying gas to hydrogen storage cylinder group 1 6 through valve group 2 5 and pipeline 4 16, realizing the recovery and storage of the gas after testing, and preparing for subsequent recycling. The ventilation circuit on valve group four 10 is also connected to pipeline eleven 24 through a pressure-reducing circulation branch. Pipeline eleven 24 is connected to pipeline twelve (i.e., circulation pipeline two 25). In this way, the hydrogen recovered by the ventilation circuit can be directly depressurized through the pressure-reducing circulation branch and then stored in hydrogen storage cylinder group one 6 through pipeline twelve, valve group two 5 and pipeline four 16, without having to go through hydrogen storage cylinder group two 11.

[0043] This system not only stores hydrogen in hydrogen storage cylinder group 6 and provides a stable and flexible supply pressure to the high-pressure testing station 8, but also allows the compressor 9 under test at the high-pressure testing station 8 to recover hydrogen after use and transport it back to hydrogen storage cylinder group 6 or hydrogen storage cylinder group 11 for storage and recycling. The system, through valve group 5 12 and various circulation pipelines, can circulate and store hydrogen in hydrogen storage cylinder group 11 and hydrogen storage cylinder group 6, and also supply hydrogen to the high-pressure testing station 8 for recycling.

[0044] This invention also provides a method for testing hydrogen in a high-pressure compressor, comprising:

[0045] 1. When the supply pressure is close to the required test pressure, hydrogen flows out from the vent column 2 and passes through pipeline 13, then through the direct supply circuit of valve group 4, and valve group 25 into hydrogen storage cylinder group 6. Here, hydrogen storage is achieved. Hydrogen storage cylinder group 6 stably supplies hydrogen externally. After passing through valve group 37, the hydrogen is delivered to the high-pressure test station 8 to supply the 90MPa compressor for testing. The compressor under test 9 then delivers the tested hydrogen through valve group 410 to hydrogen storage cylinder group 21, thereby achieving hydrogen recovery and storage. The hydrogen in hydrogen storage cylinder group 21, after passing through valve group 512, can be either circulated through the circulation pipeline 23 to the high-pressure test station 8 for recycling, or circulated through the circulation pipeline 25 and valve group 25 to hydrogen storage cylinder group 6 for storage, ready for later supply to higher test stations for recycling. The venting circuit on valve group four 10 can also be connected to pipeline eleven 24 via a pressure-reducing circulation branch, and then connected to circulation pipeline two 25 to deliver depressurized hydrogen to hydrogen storage cylinder group one 6. In this scheme, high-pressure hydrogen (pressure of about 90MPa) can be depressurized and stored via the pressure-reducing branch, and thus can also be used for testing of the compressor 9 under test, which has a relatively low pressure.

[0046] 2. When the gas supply pressure is lower than the required test pressure, hydrogen flows out from the vent column 2, is then transported by pipeline 2 14, pressurized by hydrogen compressor 3, and enters hydrogen storage cylinder group 1 6 through the direct supply circuit of valve group 1 4 and valve group 2 5. Here, hydrogen storage is achieved. Hydrogen storage cylinder group 1 6 stably supplies gas. After passing through valve group 3 7, the hydrogen is transported to the high-pressure test station 8 to supply gas to the 90MPa compressor for testing. The compressor under test 9 then transports the tested hydrogen through valve group 4 10 to hydrogen storage cylinder group 2 11, thereby achieving hydrogen recovery and storage. The hydrogen in hydrogen storage cylinder group 2 11, after passing through valve group 5 12, can be either circulated to the high-pressure test station 8 through the circulation pipeline 1 23 for hydrogen recycling, or circulated to hydrogen storage cylinder group 1 6 through the circulation pipeline 2 25 and valve group 2 5 for hydrogen storage, in order to supply gas to the higher test station for recycling later. The venting circuit on valve group four 10 can also be connected to pipeline eleven 24 via the pressure-reducing circulation branch, and then connected to the circulation pipeline two 25 to deliver depressurized hydrogen to hydrogen storage cylinder group one 6 for storage.

[0047] 3. Once the hydrogen supply in the testing system reaches the required level, pipes 1-13 and 14-2 are closed. The hydrogen circulation is powered by the compressor 9 under test at the high-pressure testing station 8. The compressor 9 discharges the tested hydrogen, which is then transported via valve group 4-10 to hydrogen storage cylinder group 2-11, thus achieving hydrogen recovery and storage. The hydrogen in hydrogen storage cylinder group 2-11, after passing through valve group 5-12, can be either circulated back to the high-pressure testing station 8 via circulation pipe 1-23 for reuse, or circulated to hydrogen storage cylinder group 6 via circulation pipe 2-25 and valve group 2-5 for storage, ready for later supply to higher testing stations for reuse. The venting circuit on valve group 4-10 can also be connected to pipe 11-24 via a pressure-reducing circulation branch, thereby connecting to circulation pipe 2-25 to supply pressure-reduced hydrogen to hydrogen storage cylinder group 1-6 for storage.

[0048] IV. In this scheme, a multi-cylinder circuit is used to supply gas to the high-pressure test station 8, which can regulate the supply gas pressure. However, when the hydrogen is recovered after testing, the gas pressure in the parallel hydrogen storage cylinder group 2 11 may have some cylinder circuits with high pressures exceeding the compressor's intake pressure requirement of 90MPa. When the supplied hydrogen pressure is too high and cannot meet the requirement that the intake pressure of the hydrogen compressor 3 is lower than the exhaust pressure, the hydrogen is depressurized through the pressure reducing branch in valve group 5 12 or the pressure reducing circulation branch in valve group 4 10 before being supplied to the hydrogen storage cylinder group 1 6. The hydrogen storage cylinder group 1 6 then supplies gas to the high-pressure test station 8 to achieve the storage and recycling of depressurized hydrogen.

[0049] 5. In the case of excessive hydrogen supply pressure, if the hydrogen pressure cannot be reduced to the required pressure value after the pressure reducing valve is used, a portion of the hydrogen will be discharged through the circulating gas path and the vent in the hydrogen storage cylinder group 2 11, thereby protecting the compressor 9 under test in the high-pressure compressor test station.

[0050] VI. When using the high-pressure compressor hydrogen testing center for the first time, it is necessary to purge and replace any residual impurities in its internal piping and instruments. This is achieved through the replacement pipe 27 in valve group five 12. The replacement pipe 27 of valve group five 12 is connected to one of the outlets of valve group five 12. This outlet is connected to one of the inlets of valve group four 10 via pipe thirteen 26. This inlet is another inlet in the ventilation circuit of valve group four 10. In this way, the replacement pipe 27 is connected to the hydrogen storage cylinder group two 11 via pipe thirteen 26 and the ventilation circuit in valve group four 10, thereby enabling the purging and replacement of residual impurities in the relevant piping and instruments.

[0051] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A high pressure compressor hydrogen test center characterized by: The device comprises a bleeder column (2) connected to a test gas source, valve group one (4), valve group two (5), hydrogen storage bottle group one (6), hydrogen storage bottle group two (11), valve group three (7), valve group four (10), valve group five (12) and a high-pressure test station (8), the valve group one (4) comprises a direct supply circuit, the bleeder column (2) is connected to the hydrogen inlet of the direct supply circuit, the hydrogen outlet of the direct supply circuit is connected to the gas inlet of the hydrogen storage bottle group one (6) through a pipeline and valve group two (5), the hydrogen storage bottle group one (6) comprises a plurality of hydrogen cylinders and a hydrogen storage control pipeline system, the storage amount of hydrogen for testing is changed by the opening and closing of the valves in different pipelines of the hydrogen storage control pipeline system, the gas outlet of the hydrogen storage bottle group one (6) is connected to the gas inlet manifold of the high-pressure test station (8) through a pipeline and valve group three (7), the gas inlet manifold is connected to the gas inlets of each compressor (9) to be tested in the high-pressure test station (8) through branch pipes, and the gas outlets of each compressor (9) to be tested are connected to the gas outlet manifold through pipelines, the gas outlet manifold is connected to the gas inlet of the hydrogen storage bottle group two (11) through the valve group four (10), and the gas outlet of the hydrogen storage bottle group two (11) is connected to the gas inlet manifold through the valve group five (12) and a pipeline. The bleeder column (2) is connected with two hydrogen supply pipelines, namely pipeline one (13) and pipeline two (14), the pipeline one (13) directly communicates with one hydrogen inlet of the direct supply circuit, and the pipeline two (14) communicates with the other hydrogen inlet of the direct supply circuit through a hydrogen compressor (3). The valve group four (10) comprises a hydrogen circulation circuit, the gas outlet manifold is connected to the cylinder circuit in the hydrogen storage bottle group two (11) through the hydrogen circulation circuit, the circulation gas circuit comprises a pressure reduction branch connected to the corresponding gas outlet and an outlet branch, the outlet branch does not reduce pressure and is connected to the gas inlet manifold of the high-pressure test station (8) through a circulation pipeline one (23), a pressure reduction valve is arranged on the pressure reduction branch and connected to the gas inlet of the valve group two (5) through a circulation pipeline two (25), and one of the two gas inlets of the valve group two (5) is connected to the circulation pipeline two (25), and the other is connected to the direct supply circuit.

2. A high pressure compressor hydrogen test center according to claim 1, characterized in that: The hydrogen storage bottle group one (6) comprises a plurality of cylinder circuits arranged in parallel, each cylinder circuit is connected in parallel between the valve group two (5) and the valve group three (7), each cylinder circuit is provided with a corresponding hydrogen cylinder and a circuit control structure, the hydrogen storage control pipeline system comprises the circuit control structure, the circuit control structure comprises a safety valve, and the safety valve is arranged on the pipeline of the cylinder circuit.

3. A high pressure compressor hydrogen test center according to claim 2, characterized in that: The gas cylinder circuit includes a single cylinder circuit and a multiple cylinder circuit, the single cylinder circuit has only one hydrogen cylinder, the multiple cylinder circuit includes a parallel cylinder group formed by parallel connection of several hydrogen cylinders, and the parallel cylinder group is connected to a pipeline of the gas cylinder circuit; the circuit control structure includes a first control structure and a second control structure arranged on the pipeline of the gas cylinder circuit, and a control valve arranged on the pipeline at both ends of each hydrogen cylinder; in the single cylinder circuit, the hydrogen cylinder and the control valve are arranged between the first control structure and the second control structure; in the multiple cylinder circuit, the parallel cylinder group is arranged between the first control structure and the second control structure, and the control valve is arranged on the pipeline at both ends of each hydrogen cylinder in the parallel cylinder group.

4. A high pressure compressor hydrogen test center in accordance with claim 1 characterized by: The hydrogen circulation circuit in the valve group four (10) further includes a decompression circulation branch, a decompression valve is arranged on the decompression circulation branch, one gas outlet of the valve group four (10) is connected to the decompression circulation branch, and the decompression circulation branch is connected to the circulation pipeline two (25) through the gas outlet and the pipeline.

5. A method of testing hydrogen gas for a high pressure compressor, characterized by: The test method comprises the following steps: hydrogen flows out from the bleeder column (2), is sequentially conveyed by the pipeline one (13) through the direct supply circuit of the valve group one (4), the valve group two (5) and the hydrogen storage cylinder group one (6), the hydrogen storage cylinder group one (6) stably supplies hydrogen outward, hydrogen is conveyed to the high-pressure test station (8) to supply hydrogen to the high-pressure compressor for testing after passing through the valve group three (7); the tested compressor (9) conveys the tested hydrogen to the hydrogen storage cylinder group two (11) through the valve group four (10); hydrogen in the hydrogen storage cylinder group two (11) can be conveyed to the high-pressure test station (8) through the circulation pipeline one (23) and can be conveyed to the hydrogen storage cylinder group one (6) for storage through the circulation pipeline two (25) and the valve group two (5) after passing through the valve group five (12); the hydrogen circulation circuit in the valve group four (10) can also be connected through the decompression circulation branch and the pipeline eleven (24), and the circulation pipeline two (25) conveys the decompressed hydrogen to the hydrogen storage cylinder group one (6) for storage.

6. The method of claim 5, wherein: When the supply pressure is close to the required test pressure, hydrogen flows out from the bleeder column (2) and is conveyed by the pipeline one (13) through the direct supply circuit of the valve group one (4); when the supply pressure is lower than the required test pressure, hydrogen flows out from the bleeder column (2) and is conveyed by the pipeline two (14) through the hydrogen compressor (3) for pressure increase and then through the direct supply circuit of the valve group one (4).

7. The method of claim 5, wherein: When the amount of hydrogen in the test system meets the test requirements, the pipeline one (13) and the pipeline two (14) are closed, the hydrogen circulation power is provided by the compressor (9) in the high-pressure test station (8), the compressor (9) then delivers the tested hydrogen to the hydrogen storage bottle group two (11) through the valve group four (10); the hydrogen in the hydrogen storage bottle group two (11) can be delivered to the high-pressure test station (8) through the circulation pipeline one (23) and can be delivered to the hydrogen storage bottle group one (6) for storage through the circulation pipeline two (25) and the valve group two (5) after the valve group five (12); the hydrogen circulation loop of the valve group four (10) can also be connected through the pressure reduction circulation branch and the pipeline eleven (24), and the circulation pipeline two (25) delivers the hydrogen with reduced pressure to the hydrogen storage bottle group one (6) for storage.

8. The method of claim 5, wherein: When the hydrogen pressure supplied by the hydrogen cylinder loop in the hydrogen storage bottle group two (11) is too high and cannot meet the requirement that the intake pressure of the compressor (9) is lower than the exhaust pressure, the hydrogen is reduced in pressure by the pressure reducing valve in the pressure reduction branch of the valve group five (12) or the pressure reduction circulation branch of the valve group four (10), and then delivered to the hydrogen storage bottle group one (6), and the hydrogen storage bottle group one (6) supplies the hydrogen to the high-pressure test station (8); When the hydrogen pressure is still too high after being reduced by the pressure reducing valve in the above-mentioned case, the hydrogen is discharged through the venting port in the circulation loop and the hydrogen storage bottle group two (11), so as to protect the compressor (9) in the high-pressure test station (8).

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