CN218932321U - Hydrogen production test system - Google Patents
Hydrogen production test system Download PDFInfo
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- CN218932321U CN218932321U CN202222744256.6U CN202222744256U CN218932321U CN 218932321 U CN218932321 U CN 218932321U CN 202222744256 U CN202222744256 U CN 202222744256U CN 218932321 U CN218932321 U CN 218932321U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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Abstract
The embodiment of the utility model provides a hydrogen production test system which comprises an electrolysis unit, an oxygen-water separation unit, a first pressure acquisition unit, a first pressure regulation unit, a hydrogen-water separation unit, a hydrogen discharge pipeline, a second pressure acquisition unit and a second pressure regulation unit, wherein the oxygen-water separation unit and the hydrogen-water separation unit are respectively communicated with the electrolysis unit, the first pressure acquisition unit is arranged on the oxygen-water separation unit, the first pressure regulation unit is used for regulating the pressure in the oxygen-water separation unit, the hydrogen discharge pipeline is communicated with the hydrogen-water separation unit, and the second pressure acquisition unit and the second pressure regulation unit are arranged on the hydrogen discharge pipeline. In the hydrogen production test system provided by the embodiment of the utility model, the first pressure regulating unit and the second pressure regulating unit coordinate to regulate the pressure difference between the oxygen-water separation unit and the hydrogen discharge pipeline, so that performance test and reliability test can be carried out on at least part of equipment of the hydrogen production system under different pressure differences before the hydrogen production system is operated in production.
Description
Technical Field
The utility model relates to the field of test systems of hydrogen production systems, in particular to a hydrogen production test system.
Background
The hydrogen production system is a process system for preparing hydrogen by a water electrolysis process through a water electrolysis hydrogen production device. When the hydrogen production system is powered by a power generation device with volatility, for example, renewable energy power is used, the fluctuating power supply can cause the gas yield of the hydrogen production system to fluctuate, so that the pressure difference between the hydrogen side and the oxygen side of the water electrolysis hydrogen production device has volatility, and the hydrogen production system has the risk of hydrogen-oxygen mixed flow caused by overlarge pressure difference between the hydrogen side and the oxygen side of the water electrolysis hydrogen production device in the operation process.
Disclosure of Invention
The present utility model aims to solve at least one of the technical problems in the related art to some extent. Therefore, the embodiment of the utility model provides a hydrogen production test system, which can realize the operation of the hydrogen production test system under different pressure states by adjusting the pressure difference between the oxygen-water separation unit and the hydrogen discharge pipeline through the coordination of the first pressure adjusting unit and the second pressure adjusting unit. Before the hydrogen production system is operated, performance test and reliability test can be carried out on at least part of equipment of the hydrogen production system under different pressure differences, so that equipment with performance and reliability meeting requirements can be selected to be applied to the hydrogen production system.
The hydrogen production test system of the embodiment of the utility model comprises:
an electrolysis unit for electrolyzing pure water and discharging a mixture of hydrogen and water and a mixture of oxygen and water;
an oxygen-water separation unit in communication with the electrolysis unit for receiving a mixture of oxygen and water discharged from the electrolysis unit to separate oxygen and water, and for supplying pure water to the electrolysis unit, the oxygen-water separation unit having an oxygen vent;
a first pressure acquisition unit provided on the oxygen-water separation unit for acquiring a pressure in the oxygen-water separation unit;
a first pressure adjusting unit that can adjust an opening degree of the oxygen vent for adjusting a pressure in the oxygen-water separation unit;
a hydrogen-water separation unit in communication with the electrolysis unit for receiving a mixture of hydrogen and water discharged from the electrolysis unit to separate hydrogen and water;
a hydrogen discharge pipe which is communicated with the hydrogen-water separation unit and is used for discharging the hydrogen separated by the hydrogen-water separation unit;
the second pressure acquisition unit is arranged on the hydrogen discharge pipeline to acquire the pressure in the hydrogen discharge pipeline;
The second pressure adjusting unit is arranged on the hydrogen discharge pipeline and is used for adjusting the pressure in the hydrogen discharge pipeline.
According to the hydrogen production test system provided by the embodiment of the utility model, the pressure in the oxygen-water separation unit is regulated through the first pressure regulating unit so as to regulate the pressure in the oxygen side of the electrolysis unit, the pressure in the hydrogen discharge pipeline is regulated through the second pressure regulating unit so as to regulate the pressure on the hydrogen side of the electrolysis unit, and therefore, the pressure difference between the oxygen-water separation unit and the hydrogen discharge pipeline is regulated through the coordination of the first pressure regulating unit and the second pressure regulating unit, so that before the hydrogen production system operates, performance test and reliability test can be carried out on at least part of equipment of the hydrogen production system under different pressure differences, and equipment with the reliability meeting requirements can be detected and selected to be applied to the hydrogen production system. The pressure difference between the pressure in the oxygen-water separation unit and the pressure in the hydrogen discharge pipeline can be obtained through the pressures respectively acquired by the first pressure acquisition unit and the second pressure acquisition unit.
In some embodiments, the hydrogen production test system includes a pressure equalization state and a differential pressure state;
In the pressure equalizing state, the pressure in the hydrogen discharging pipeline has a first preset range, the second pressure regulating unit regulates the pressure in the hydrogen discharging pipeline according to the pressure acquired by the second pressure acquiring unit so that the pressure in the hydrogen discharging pipeline is in a first preset range, and the first pressure regulating unit regulates the pressure in the oxygen-water separating unit according to the pressure acquired by the first pressure acquiring unit and the pressure acquired by the second pressure acquiring unit so that the pressure in the oxygen-water separating unit approaches the pressure acquired by the second pressure acquiring unit in real time;
in the differential pressure state, the pressure in the hydrogen discharge pipeline has a second preset range, the second pressure regulating unit regulates the pressure in the hydrogen discharge pipeline according to the pressure obtained by the second pressure obtaining unit so that the pressure in the hydrogen discharge pipeline is in the second preset range, and the first pressure regulating unit is opened so that the inside of the oxygen-water separation unit is at normal pressure.
In some embodiments, the hydrogen production test system further comprises a purification device disposed on the hydrogen discharge line;
the second pressure acquisition unit comprises a first hydrogen pressure acquisition device and a second hydrogen pressure acquisition device, wherein the first hydrogen pressure acquisition device is positioned at the upstream of the purification device, and the second hydrogen pressure acquisition device is positioned at the downstream of the purification device;
The second pressure adjusting unit adjusts the pressure in the hydrogen discharge pipeline according to the pressure acquired by the second hydrogen pressure acquirer, and in the pressure equalizing state, the first pressure adjusting unit adjusts the pressure in the oxygen-water separation unit according to the pressure acquired by the first pressure acquiring unit and the pressure acquired by the first hydrogen pressure acquirer.
In some embodiments, the hydrogen production test system further comprises a water supply unit for supplying pure water to the oxygen water separation unit.
In some embodiments, the water supply unit includes:
the water tank is used for storing pure water;
the high-pressure water pump is communicated with the water tank and the oxygen-water separation unit and is used for pumping pure water stored in the water tank into the oxygen-water separation unit in the pressure equalizing state;
the normal pressure water pump is communicated with the water tank and the oxygen-water separation unit, so that pure water stored in the water tank is pumped into the oxygen-water separation unit in the differential pressure state, the normal pressure water pump is connected with the high pressure water pump in parallel, and the pump water pressure of the normal pressure water pump is lower than that of the high pressure water pump.
In some embodiments, the hydrogen production test system further comprises:
a desalination pipeline which communicates the oxygen-water separation unit with the water tank so that water in the oxygen-water separation unit enters the water tank;
and the desalting unit is arranged on the desalting pipeline and used for reducing the conductivity of water in the desalting pipeline.
In some embodiments, the hydrogen production test system further comprises:
the pressure reducing valve is arranged on the desalting pipeline and is positioned at the upstream of the desalting unit; and
the multi-way valve is provided with a first valve port, a second valve port and a third valve port, the first valve port and the second valve port are both arranged on the desalting pipeline, the multi-way valve is positioned at the upstream of the pressure reducing valve, the third valve port is communicated with the desalting pipeline through a bypass pipeline, and the bypass pipeline and the pressure reducing valve are arranged in parallel;
in the pressure equalizing state, the first valve port and the second valve port are opened, and the third valve port is closed;
in the differential pressure state, the first valve port and the third valve port are opened, and the second valve port is closed.
In some embodiments, the hydrogen production test system further comprises a first cooling unit disposed on the desalination line, and the first cooling unit is located upstream of the desalination unit.
In some embodiments, the hydrogen production test system further comprises a second cooling unit disposed within or in cyclic communication with the oxygen water separation unit for reducing the temperature of the purified water within the oxygen water separation unit.
In some embodiments, the second cooling unit is disposed on the desalination line, and the second cooling unit is located upstream of the multi-way valve and the first cooling unit;
the hydrogen production test system further comprises:
the flow acquisition unit is arranged on the desalting pipeline and is positioned between the second cooling unit and the desalting unit;
one end of the return pipeline is communicated with the desalination pipeline, one end of the return pipeline is positioned between the second cooling unit and the multi-way valve and is positioned at the upstream of the flow acquisition unit, the other end of the return pipeline is communicated with the oxygen-water separation unit, and the return pipeline is used for returning pure water in the desalination pipeline to the oxygen-water separation unit;
the flow regulating valve is arranged on the return pipeline and is used for regulating the flow of the return pipeline according to the flow value acquired by the flow acquisition unit.
In some embodiments, the hydrogen-water separation unit communicates with the water supply unit such that water separated by the hydrogen-water separation unit is supplied into the water supply unit.
In some embodiments, the hydrogen-water separation device further comprises a first supply pipeline and a third pressure acquisition unit, wherein the first supply pipeline is communicated with the electrolysis unit and the hydrogen-water separation unit so as to feed the mixture of the hydrogen and the water discharged by the electrolysis unit into the hydrogen-water separation unit, and the third pressure acquisition unit is arranged on the first supply pipeline; and/or
The device also comprises a second supply pipeline and a fourth pressure acquisition unit, wherein the second supply pipeline is communicated with the electrolysis unit and the oxygen-water separation unit so as to supply the mixture of oxygen and water discharged by the electrolysis unit into the oxygen-water separation unit, and the fourth pressure acquisition unit is arranged on the second supply pipeline.
Drawings
FIG. 1 is a schematic diagram of a hydrogen production test system in accordance with an embodiment of the present utility model.
Reference numerals:
1. an electrolysis unit; 2. an oxygen-water separation unit; 3. a first pressure acquisition unit; 4. a first pressure regulating unit; 5. a hydrogen-water separation unit; 6. a hydrogen discharge pipeline; 7. a second pressure acquisition unit; 701. a first hydrogen pressure acquirer; 702. a second hydrogen pressure acquirer; 8. a second pressure regulating unit; 9. a purifying device; 10. a water tank; 11. a high pressure water pump; 12. a normal pressure water pump; 13. a desalting pipeline; 14. a desalting unit; 15. a pressure reducing valve; 16. a multi-way valve; 17. a first cooling unit; 18. a second cooling unit; 19. a flow rate acquisition unit; 20. a return line; 21. a flow regulating valve; 22. a third pressure acquisition unit; 23. a fourth pressure acquisition unit; 24. a first water pump; 25. and a second water pump.
Detailed Description
Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.
A hydrogen production test system according to an embodiment of the utility model is described below with reference to fig. 1.
As shown in fig. 1, the hydrogen production test system according to the embodiment of the present utility model includes an electrolysis unit 1, an oxygen-water separation unit 2, a first pressure acquisition unit 3, a first pressure adjustment unit 4, a hydrogen-water separation unit 5, a hydrogen discharge pipe 6, a second pressure acquisition unit 7, and a second pressure adjustment unit 8.
The electrolysis unit 1 is for electrolyzing pure water and discharging a mixture of hydrogen and water and a mixture of oxygen and water. Specifically, as shown in fig. 1, the electrolysis unit 1 is an electrolysis cell or an electrolytic cell, and the water mixed with oxygen is water that is not electrolyzed.
The oxygen-water separation unit 2 communicates with the electrolysis unit 1 for receiving a mixture of oxygen and water discharged from the electrolysis unit 1 to separate oxygen and water, and for supplying pure water to the electrolysis unit 1, the oxygen-water separation unit 2 having an oxygen vent. Specifically, as shown in fig. 1, the oxygen-water separation unit 2 is preferably a gas-water separator, the oxygen-water separation unit 2 is simultaneously communicated with the electrolysis unit 1 through two pipelines, one of the two pipelines is a water supply pipeline, the other one is a second supply pipeline, a first water pump 24 is arranged on the water supply pipeline, pure water in the oxygen-water separation unit 2 is pumped into the electrolysis unit 1 for electrolysis under the power action of the first water pump 24, a mixture of oxygen and water generated by electrolysis flows back to the oxygen-water separation unit 2 through the second supply pipeline, and separation of oxygen and water is realized in the oxygen-water separation unit 2 so as to realize cyclic utilization of water. The oxygen-water separation unit 2 has an oxygen vent, and the oxygen vent may be an opening formed in a wall surface of the oxygen-water separation unit 2 or may be a pipe hole of an oxygen vent pipe provided in the oxygen-water separation unit 2.
The first pressure acquisition unit 3 is provided on the oxygen-water separation unit 2 for acquiring the pressure inside the oxygen-water separation unit 2. Specifically, as shown in fig. 1, the first pressure acquisition unit 3 is preferably a pressure transmitter for acquiring the gas pressure inside the oxygen water separation unit 2. It will be appreciated that in other embodiments the first pressure acquisition unit 3 may also be a pressure gauge.
The first pressure regulating unit 4 can regulate the opening of the oxygen vent for regulating the pressure in the oxygen water separation unit 2. Specifically, as shown in fig. 1, the first pressure adjusting unit 4 is preferably a pressure adjusting valve, and a pneumatic adjusting valve, a back pressure valve, or the like may be selected, the oxygen vent is preferably a pipe hole of a gas vent pipe provided with the oxygen-water separation unit 2, the first pressure adjusting unit 4 is provided on the oxygen vent pipe of the oxygen-water separation unit 2, and the opening and flow rate of the oxygen vent pipe hole are adjusted by the opening of the pressure adjusting valve as the first pressure adjusting unit 4, thereby adjusting the pressure in the oxygen-water separation unit 2. It will be appreciated that in other embodiments, the oxygen vent is an opening formed on the wall surface of the oxygen-water separation unit 2, and the pressure regulating valve serving as the first pressure regulating unit 4 is formed on the wall surface of the oxygen-water separation unit 2, and the valve port serving as the pressure regulating valve of the first pressure regulating unit 4 is communicated with the oxygen vent, and the opening and the flow rate of the oxygen vent are regulated by the opening of the pressure regulating valve serving as the first pressure regulating unit 4, so as to regulate the gas pressure in the oxygen-water separation unit 2.
The hydrogen-water separation unit 5 communicates with the electrolysis unit 1 for receiving a mixture of hydrogen gas and water discharged from the electrolysis unit 1 to separate the hydrogen gas and water. Specifically, as shown in fig. 1, the hydrogen-water separation unit 5 is preferably a gas-water separator, the hydrogen-water separation unit 5 communicates with the electrolysis unit 1 through a first supply line to obtain a mixture of hydrogen and water generated by electrolysis of the electrolysis unit 1, the mixture of hydrogen and water is separated into hydrogen and water in the hydrogen-water separation unit 5 and is discharged out of the hydrogen-water separation unit 5, respectively.
The hydrogen discharge line 6 communicates with the hydrogen-water separation unit 5 for discharging the hydrogen gas separated by the hydrogen-water separation unit 5. As shown in fig. 1, the left end of the hydrogen discharge pipe 6 is communicated with the hydrogen-water separation unit 5 to obtain hydrogen separated by the hydrogen-water separation unit 5, and the right end of the hydrogen discharge pipe 6 is a hydrogen discharge port for discharging hydrogen.
A second pressure acquisition unit 7 is provided on the hydrogen discharge pipe 6 to acquire the pressure in the hydrogen discharge pipe 6. Specifically, as shown in fig. 1, the second pressure acquisition unit 7 is preferably a pressure transmitter for acquiring the gas pressure in the hydrogen discharge line 6. It will be appreciated that in other embodiments the second pressure acquisition unit 7 may also be a pressure gauge.
The second pressure adjusting unit 8 is arranged on the hydrogen discharge pipeline 6, and the second pressure adjusting unit 8 is used for adjusting the pressure in the hydrogen discharge pipeline 6. Specifically, as shown in fig. 1, the second pressure adjusting means 8 is preferably a pressure adjusting valve, a pneumatic adjusting valve, a back pressure valve, or the like may be selected, the second pressure adjusting means 8 is provided on the hydrogen discharge line 6, and is preferably provided downstream of the second pressure obtaining means 7, and the gas pressure in the hydrogen discharge line 6 is adjusted by the opening degree of the pressure adjusting valve as the second pressure adjusting means 8.
According to the hydrogen production test system provided by the embodiment of the utility model, the pressure in the oxygen-water separation unit is regulated through the first pressure regulating unit so as to regulate the pressure in the oxygen side of the electrolysis unit, the pressure in the hydrogen discharge pipeline is regulated through the second pressure regulating unit so as to regulate the pressure on the hydrogen side of the electrolysis unit, and therefore, the pressure difference between the oxygen-water separation unit and the hydrogen discharge pipeline is regulated through the coordination of the first pressure regulating unit and the second pressure regulating unit, so that before the hydrogen production system operates, performance test and reliability test can be carried out on at least part of equipment of the hydrogen production system under different pressure differences, and equipment with the reliability meeting requirements can be detected and selected to be applied to the hydrogen production system. The pressure difference between the pressure in the oxygen-water separation unit and the pressure in the hydrogen discharge pipeline can be obtained through the pressures respectively acquired by the first pressure acquisition unit and the second pressure acquisition unit.
In the test process, the performance test and the reliability test are not limited to the performance test and the reliability test of the electrolysis unit, and the performance test and the reliability test of the oxygen-water separation unit and/or the hydrogen-water separation unit can be performed simultaneously because the oxygen-water separation unit and the hydrogen-water separation unit also belong to equipment of the hydrogen production system.
In some embodiments, the hydrogen production test system of embodiments of the present utility model includes a pressure equalization state and a differential pressure state.
In the pressure equalizing state, the pressure in the hydrogen discharge pipeline 6 has a first preset range, the second pressure adjusting unit 8 adjusts the pressure in the hydrogen discharge pipeline 6 according to the pressure acquired by the second pressure acquiring unit 7 so that the pressure in the hydrogen discharge pipeline 6 is in the first preset range, and the first pressure adjusting unit 4 adjusts the pressure in the oxygen-water separation unit 2 according to the pressure acquired by the first pressure acquiring unit 3 and the pressure acquired by the second pressure acquiring unit 7 so that the pressure in the oxygen-water separation unit 2 approaches the pressure acquired by the second pressure acquiring unit 7 in real time.
Specifically, in the pressure equalizing state, the second pressure adjusting unit 8 is electrically connected to the second pressure acquiring unit 7, and the first pressure adjusting unit 4 is electrically connected to both the first pressure acquiring unit 3 and the second pressure acquiring unit 7. The pressure in the hydrogen discharge pipe 6 has a first reference value, in other words, the second pressure acquisition unit 7 has a first reference value, the pressure in the hydrogen discharge pipe 6 is acquired in real time by the second pressure acquisition unit 7 and compared with the reference value, when the pressure acquired by the second pressure acquisition unit 7 is greater than the first reference value, the second pressure adjustment unit 8 increases the opening after receiving the electric signal of the second pressure acquisition unit 7 to decrease the pressure in the hydrogen discharge pipe 6 and approach the first reference value in real time, and when the pressure acquired by the second pressure acquisition unit 7 is smaller than the first reference value, the second pressure adjustment unit 8 decreases the opening after receiving the electric signal of the second pressure acquisition unit 7 to decrease the pressure in the hydrogen discharge pipe 6 and approach the first reference value in real time, so that the pressure in the hydrogen discharge pipe 6 and the hydrogen pressure discharged from the hydrogen discharge pipe 6 are always within a range including the first reference value, that is, the first preset range of the pressure in the hydrogen discharge pipe 6.
Meanwhile, the first pressure adjusting unit 4 acquires the electric signals of the first pressure acquiring unit 3 and the second pressure acquiring unit 7 in real time and compares the pressure acquired by the first pressure acquiring unit 3 with the pressure acquired by the second pressure acquiring unit 7, when the pressure acquired by the first pressure acquiring unit 3 is greater than the pressure acquired by the second pressure acquiring unit 7, the first pressure adjusting unit 4 increases the opening degree to reduce the pressure in the oxygen-water separating unit 2, and when the pressure acquired by the first pressure acquiring unit 3 is less than the pressure acquired by the second pressure acquiring unit 7, the first pressure adjusting unit 4 decreases the opening degree to increase the pressure in the oxygen-water separating unit 2, so that the pressure in the oxygen-water separating unit 2 approaches the pressure acquired by the second pressure acquiring unit 7 in real time, in other words, the pressure in the oxygen-water separating unit 2 approaches the pressure in the hydrogen discharging pipeline 6 in real time.
Therefore, the hydrogen production test system can be in a pressure equalizing state with a small difference between the pressure in the oxygen-water separation unit and the pressure in the hydrogen discharge pipeline.
In the differential pressure state, the pressure in the hydrogen discharge pipeline 6 has a second preset range, the second pressure regulating unit 8 regulates the pressure in the hydrogen discharge pipeline 6 according to the pressure acquired by the second pressure acquiring unit 7 so that the pressure in the hydrogen discharge pipeline 6 is in the second preset range, and the first pressure regulating unit 4 is opened so that the inside of the oxygen-water separation unit 2 is at normal pressure.
Specifically, in the differential pressure state, the second pressure adjusting unit 8 is electrically connected to the second pressure acquiring unit 7. The pressure in the hydrogen discharge pipe 6 has a second reference value, in other words, the second pressure acquisition unit 7 has a second reference value, the pressure in the hydrogen discharge pipe 6 is acquired in real time by the second pressure acquisition unit 7 and compared with the second reference value, when the pressure acquired by the second pressure acquisition unit 7 is greater than the second reference value, the second pressure adjustment unit 8 increases the opening after receiving the electric signal of the second pressure acquisition unit 7 to decrease the pressure in the hydrogen discharge pipe 6 and approach the second reference value in real time, and when the pressure acquired by the second pressure acquisition unit 7 is smaller than the second reference value, the second pressure adjustment unit 8 decreases the opening after receiving the electric signal of the second pressure acquisition unit 7 to decrease the pressure in the hydrogen discharge pipe 6 and approach the second reference value in real time, so that the pressure in the hydrogen discharge pipe 6 and the hydrogen pressure discharged from the hydrogen discharge pipe 6 are always within a range including the second reference value, that is, the second preset range of the pressure in the hydrogen discharge pipe 6.
Meanwhile, the first pressure regulating unit 4 is opened to enable the oxygen vent or the oxygen vent pipe to be opened, so that the inside of the oxygen-water separation unit 2 is at normal pressure, and the hydrogen discharged from the electrolysis unit 1 is always in a second preset range under the regulation of the second pressure regulating unit 8, and the inside of the oxygen-water separation unit 2 is at normal pressure, so that the difference between the pressure in the oxygen-water separation unit 2 and the pressure in the hydrogen discharge pipeline is large, and the hydrogen production test system is in a differential pressure state.
Preferably, the first preset range is greater than the second preset range.
Therefore, the hydrogen production test system provided by the embodiment of the utility model has the advantages that the first pressure regulating unit and the second pressure regulating unit act cooperatively, so that the hydrogen production test system can have a pressure equalizing state with smaller difference between the pressure in the oxygen-water separation unit and the pressure in the hydrogen discharge pipeline and a differential pressure state with larger difference between the pressure in the oxygen-water separation unit and the pressure in the hydrogen discharge pipeline, and at least part of equipment of the hydrogen production system including the electrolysis unit can be subjected to performance test and reliability test in the pressure equalizing state and the differential pressure state respectively before the hydrogen production system is operated, so that equipment performance detection is completed, and equipment with reliability meeting requirements is selected to be applied to the hydrogen production system.
In some embodiments, the hydrogen production test system according to the embodiment of the present utility model further includes a first supply line and a third pressure acquisition unit 22, the first supply line communicating the electrolysis unit 1 and the hydrogen-water separation unit 5 to supply the mixture of hydrogen and water discharged from the electrolysis unit 1 to the hydrogen-water separation unit 5, the third pressure acquisition unit 22 being disposed on the first supply line; and/or further comprises a second supply line communicating the electrolysis unit 1 and the oxygen-water separation unit 2 to supply the mixture of oxygen and water discharged from the electrolysis unit 1 to the oxygen-water separation unit 2, and a fourth pressure acquisition unit 23 provided on the second supply line.
As shown in fig. 1, a fourth pressure acquisition unit 23 is provided on the second supply line, the fourth pressure acquisition unit 23 preferably being a pressure transmitter, the fourth pressure acquisition unit 23 being adapted to acquire the pressure in the second supply line in real time for acquiring the pressure at the outlet of the electrolysis unit 1 for discharging a mixture of oxygen and water. The first supply line is provided with a third pressure acquisition unit 22, preferably a pressure transmitter, the third pressure acquisition unit 22 being arranged to acquire the pressure in the first supply line in real time for acquiring the pressure at the outlet of the electrolysis unit 1 for discharging the mixture of hydrogen and water. Since the pressures acquired by the third pressure acquisition unit 22 and the fourth pressure acquisition unit 23 are closer to the pressures to which both sides of the proton exchange membrane are subjected, the pressures acquired by the third pressure acquisition unit 22 and the fourth pressure acquisition unit 23 can be used for performance detection and reliability determination at the time of the test.
It is to be appreciated that in other embodiments, the hydrogen production test system may not have the third pressure acquisition unit and the fourth pressure acquisition unit.
In some embodiments, the hydrogen production test system of the present utility model further comprises a purification device 9, wherein the purification device 9 is arranged on the hydrogen discharge pipeline 6.
Specifically, as shown in fig. 1, a purifying device 9 is disposed on the hydrogen discharge pipeline 6, where the purifying device 9 is used to purify the hydrogen separated by the hydrogen-water separation unit 5, remove a small amount of water mixed in the hydrogen, or remove a small amount of water and a small amount of oxygen mixed in the hydrogen, so that the purity of the hydrogen discharged by the hydrogen discharge pipeline 6 is higher. Meanwhile, the purifying device 9 also belongs to equipment in the hydrogen production system, and the purifying device 9 can slightly influence the pressure in the hydrogen discharge pipeline 6, so that the structure of the hydrogen production test system is closer to that of the hydrogen production system by arranging the purifying device 9, so that the data and the results obtained by the test are more in accordance with the running condition and the requirements of the hydrogen production system, and meanwhile, the performance test and the reliability test can be carried out on the purifying device 9.
The second pressure acquisition unit 7 includes a first hydrogen pressure acquirer 701 and a second hydrogen pressure acquirer 702, the first hydrogen pressure acquirer 701 being located upstream of the purification apparatus 9, the second hydrogen pressure acquirer 702 being located downstream of the purification apparatus 9.
Specifically, as shown in fig. 1, the second pressure acquisition unit 7 includes a first hydrogen pressure acquisition device 701 located upstream of the purification device 9, and a second hydrogen pressure acquisition device 702 located downstream of the purification device 9, and the first hydrogen pressure acquisition device 701 and the second hydrogen pressure acquisition device 702 are each preferably pressure transmitters.
In the pressure equalizing state, the second pressure adjusting unit 8 adjusts the pressure in the hydrogen discharge pipe 6 according to the pressure acquired by the second hydrogen pressure acquirer 702, and the first pressure adjusting unit 4 adjusts the pressure in the oxygen-water separation unit 2 according to the pressure acquired by the first pressure acquiring unit 3 and the pressure acquired by the first hydrogen pressure acquirer 701.
Specifically, in the pressure equalizing state, the second pressure adjusting unit 8 is electrically connected to the second hydrogen pressure acquirer 702. The pressure in the hydrogen discharge pipeline 6 is acquired in real time through the second hydrogen pressure acquirer 702 and compared with the first reference value, when the pressure acquired by the second hydrogen pressure acquirer 702 is larger than the first reference value, the second pressure regulating unit 8 increases the opening after receiving the electric signal of the second hydrogen pressure acquirer 702 so as to reduce the pressure in the hydrogen discharge pipeline 6 and approach the first reference value in real time, and when the pressure acquired by the second hydrogen pressure acquirer 702 is smaller than the first reference value, the second pressure regulating unit 8 reduces the opening after receiving the electric signal of the second hydrogen pressure acquirer 702 so as to reduce the pressure in the hydrogen discharge pipeline 6 and approach the first reference value in real time, so that the pressure in the hydrogen discharge pipeline 6 and the hydrogen pressure discharged from the hydrogen discharge pipeline 6 are always in a first preset range.
In the differential pressure state, the second pressure regulating unit 8 is electrically connected to the second hydrogen pressure acquirer 702. The pressure in the hydrogen discharge pipeline 6 is acquired in real time through the second hydrogen pressure acquirer 702 and compared with the second reference value, when the pressure acquired by the second hydrogen pressure acquirer 702 is larger than the second reference value, the second pressure regulating unit 8 increases the opening after receiving the electric signal of the second hydrogen pressure acquirer 702 so as to reduce the pressure in the hydrogen discharge pipeline 6 and approach the second reference value in real time, and when the pressure acquired by the second hydrogen pressure acquirer 702 is smaller than the second reference value, the second pressure regulating unit 8 reduces the opening after receiving the electric signal of the second hydrogen pressure acquirer 702 so as to reduce the pressure in the hydrogen discharge pipeline 6 and approach the second reference value in real time, so that the pressure in the hydrogen discharge pipeline 6 and the hydrogen pressure discharged from the hydrogen discharge pipeline 6 are always in a second preset range.
Since the second hydrogen pressure acquirer 702 is disposed closer to the second pressure adjusting unit 8 than the first hydrogen pressure acquirer 701, electrically connecting the second pressure adjusting unit 8 to the second hydrogen pressure acquirer 702 can reduce the reaction delay of the second pressure adjusting unit 8, so that the pressure in the hydrogen discharge line 6 can approach the first reference value and approach the second reference value more quickly. Meanwhile, since the second hydrogen pressure acquirer 702 is located downstream of the purifying device 9, the pressure acquired by the second hydrogen pressure acquirer 702 is the pressure affected by the purifying device 9, and the second pressure adjusting unit 8 adjusts the pressure according to the second hydrogen pressure acquirer 702 to make the pressure adjustment more accurate.
In the pressure equalizing state, the first pressure regulating unit 4 is electrically connected to both the first pressure obtaining unit 3 and the first hydrogen pressure obtaining unit 701. In the differential pressure state, the first pressure regulating unit 4 is opened.
In the pressure equalizing state, the first pressure adjusting unit 4 acquires the electric signals of the first pressure acquiring unit 3 and the first hydrogen pressure acquirer 701 in real time and compares the pressure acquired by the first pressure acquiring unit 3 with the pressure acquired by the first hydrogen pressure acquirer 701, when the pressure acquired by the first pressure acquiring unit 3 is greater than the pressure acquired by the first hydrogen pressure acquirer 701, the first pressure adjusting unit 4 increases the opening degree to reduce the pressure in the oxygen-water separation unit 2, and when the pressure acquired by the first pressure acquiring unit 3 is less than the pressure acquired by the first hydrogen pressure acquirer 701, the first pressure adjusting unit 4 decreases the opening degree to increase the pressure in the oxygen-water separation unit 2, so that the pressure in the oxygen-water separation unit 2 approaches the pressure acquired by the first hydrogen pressure acquirer 701 in real time.
Since the first hydrogen pressure acquirer 701 is disposed at a position closer to the electrolysis unit than the second hydrogen pressure acquirer 702, electrically connecting the first hydrogen pressure acquirer 701 with the first pressure acquisition unit 3 and the first pressure adjustment unit 4 can reduce the reaction delay of the first pressure adjustment unit 4.
In some embodiments, the hydrogen production test system of the embodiment of the present utility model further includes a water supply unit for supplying pure water to the oxygen-water separation unit 2.
In some embodiments, the water supply unit includes a water tank 10, a high pressure water pump 11, and an atmospheric pressure water pump 12. The water tank 10 is for storing pure water. The high-pressure water pump 11 communicates with the water tank 10 and the oxygen-water separation unit 2 for pumping pure water stored in the water tank 10 into the oxygen-water separation unit 2 in a pressure equalizing state. The normal pressure water pump 12 is communicated with the water tank 10 and the oxygen-water separation unit 2, and is used for pumping pure water stored in the water tank 10 into the oxygen-water separation unit 2 in a differential pressure state, the normal pressure water pump 12 is connected with the high pressure water pump 11 in parallel, and the pump water pressure of the normal pressure water pump 12 is lower than that of the high pressure water pump 11.
As shown in fig. 1, the water tank 10 is used for storing pure water, the water tank 10 and the oxygen-water separation unit 2 are communicated through the high-pressure water pump 11 and the normal-pressure water pump 12 which are connected in parallel, and the high-pressure water pump 11 and the normal-pressure water pump 12 are respectively used for pumping the pure water in the water tank 10 into the oxygen-water separation unit 2 so as to supplement the pure water in the oxygen-water separation unit 2, so that the oxygen-water separation unit 2 can meet the water supply requirement of the electrolysis unit 1. In the differential pressure state, the inside of the oxygen-water separation unit 2 is at normal pressure, so that the normal pressure water pump 12 is used for pumping water, and in the pressure equalizing state, the inside of the oxygen-water separation unit 2 is at high pressure, so that the high pressure water pump 11 is used for pumping water, and pure water in the water tank 10 can enter the oxygen-water separation unit 2.
It will be appreciated that in other embodiments, the water supply unit may have only a high pressure water pump and no atmospheric water pump. The water supply unit may further include an ultrapure water device in communication with the water tank, the ultrapure water device being for producing pure water and supplying the pure water to the water tank.
In some embodiments, the hydrogen production test system of embodiments of the present utility model further includes a desalination line 13 and a desalination unit 14. The desalination line 13 communicates the oxygen-water separation unit 2 with the water tank 10 so that water in the oxygen-water separation unit 2 enters the water tank 10. A desalination unit 14 is provided on the desalination line 13 for reducing the conductivity of the water in the desalination line 13.
As shown in fig. 1, the oxygen-water separation unit 2 is communicated with the water tank 10 through a desalination pipeline 13, and a desalination unit 14 and a second water pump 25 are arranged on the desalination pipeline 13, wherein the desalination unit 14 is preferably a desalination device, such as a continuous electric desalination device. Because the water electrolyzed by the electrolysis unit 1 can flow back into the oxygen-water separation unit 2, the conductivity of the water in the oxygen-water separation unit 2 can be increased, and the requirement of the electrolysis unit 1 on the conductivity is not met any more, a desalting pipeline 13 and a desalting unit 14 are arranged, part of the water in the oxygen-water separation unit 2 flows into the water tank 10 through the desalting pipeline 13, and the conductivity of the water is reduced through the desalting unit 14 when the desalting unit 14 is in the path, so that the conductivity of the water in the hydrogen production test system with the pressure state switching function, particularly the conductivity of the water in the oxygen-water separation unit 2, is stabilized within a normal range value capable of carrying out electrolysis, and the test can be continuously carried out. Meanwhile, since the desalination unit 14 is also a part of the hydrogen production system, the desalination unit 14 can be tested for performance test and reliability test.
It is to be appreciated that in other embodiments, the hydrogen production test system may not have a desalination line and a desalination unit.
In some embodiments, the hydrogen production test system of embodiments of the present utility model further includes a pressure relief valve 15 and a multi-way valve 16. A pressure reducing valve 15 is provided on the desalination line 13, and the pressure reducing valve 15 is located upstream of the desalination unit 14. The multi-way valve 16 is preferably a three-way valve having a first valve port, a second valve port and a third valve port, the first valve port and the second valve port are both provided on the desalination line 13, and the multi-way valve 16 is located upstream of the pressure reducing valve 15, the third valve port is communicated with the desalination line 13 through a detour line, and the detour line and the pressure reducing valve 15 are arranged in parallel. In the pressure equalizing state, the first valve port and the second valve port are opened, and the third valve port is closed; in the differential pressure state, the first valve port and the third valve port are opened, and the second valve port is closed.
As shown in fig. 1, the desalination line 13 is provided with a pressure reducing valve 15 and a multi-way valve 16, the multi-way valve 16 is positioned upstream of the pressure reducing valve 15, the multi-way valve 16 is provided with a first valve port (a valve port at the left end as shown in fig. 1) facing the oxygen-water separation unit 2, a second valve port (a valve port at the right end as shown in fig. 1) facing the desalination unit 14, and a third valve port (a valve port at the upper end as shown in fig. 1), wherein the first valve port and the second valve port are connected on the desalination line 13, the third valve port is communicated with the desalination line 13 through a bypass line, and the bypass line and the pressure reducing valve 15 are arranged in parallel, in other words, the bypass line and the pressure reducing valve 15 are connected in parallel between the oxygen-water separation unit 2 and the desalination unit 14.
In the differential pressure state, since the water discharged from the oxygen-water separation unit 2 is in a normal pressure state, the water inlet pressure requirement of the desalination unit 14 is met, and decompression is not needed, so that the first valve port and the third valve port are opened, the second valve port is closed, and the water in the desalination pipeline 13 enters the desalination pipeline 13 again after bypassing the pipeline evading decompression valve 15, and at the moment, the decompression valve 15 is in a standby or stop state.
In the pressure equalizing state, since the water discharged from the oxygen-water separation unit 2 has a certain pressure and exceeds the water inlet pressure requirement of the desalination unit 14, the pressure of the water in the desalination pipeline 13 needs to be reduced by using the pressure reducing valve 15 to meet the water inlet pressure requirement of the desalination unit 14, so that the first valve port and the second valve port are opened, the third valve port is closed, and the water in the desalination pipeline 13 enters the desalination unit 14 through the pressure reducing valve 15.
In some embodiments, the hydrogen production test system of the present utility model further includes a first cooling unit 17, where the first cooling unit 17 is disposed on the desalination pipeline 13, and the first cooling unit 17 is located upstream of the desalination unit 14.
As shown in fig. 1, the desalting pipeline 13 is provided with a first cooling unit 17, and the first cooling unit 17 is located upstream of the desalting unit 14 and downstream of the parallel bypass pipeline and the pressure reducing valve 15. Since the desalination unit 14 requires a low temperature of the incoming water, the first cooling unit 17 is provided to cool the water flowing from the oxygen-water separation unit 2 to the desalination unit 14 to satisfy the incoming water temperature requirement of the desalination unit 14, and since the water flowing into the desalination unit 14 needs to be cooled in both the pressure equalizing state and the differential pressure state, the first cooling unit 17 is preferably provided downstream of the bypass line and the pressure reducing valve 15 connected in parallel.
It will be appreciated that in other embodiments, the first cooling unit may also be provided upstream of the multi-way valve.
In some embodiments, the hydrogen production test system of the present utility model further includes a second cooling unit 18, where the second cooling unit 18 is disposed in the oxygen-water separation unit 2 or is in circulation communication with the oxygen-water separation unit 2, for reducing the temperature of pure water in the oxygen-water separation unit 2.
In some embodiments, a second cooling unit 18 is provided on the desalination line 13, and the second cooling unit 18 is located upstream of the multi-way valve 16 and the first cooling unit 17.
As shown in fig. 1, the first cooling unit 17 is located downstream of the multi-way valve 16 and downstream of the parallel bypass pipeline and the pressure reducing valve 15, the desalination pipeline 13 is provided with a second cooling unit 18, and the second cooling unit 18 is located upstream of the multi-way valve 16.
The hydrogen production test system of the embodiment of the utility model further comprises a flow acquisition unit 19, a return pipeline 20 and a flow regulating valve 21. The flow obtaining unit 19 is arranged on the desalting pipeline 13 and is positioned between the second cooling unit 18 and the desalting unit 14. One end of a return pipeline 20 is communicated with the desalting pipeline 13, one end of the return pipeline 20 is positioned between the second cooling unit 18 and the multi-way valve 16 and is positioned at the upstream of the flow acquisition unit 19, the other end of the return pipeline 20 is communicated with the oxygen-water separation unit 2, and the return pipeline 20 is used for returning pure water in the desalting pipeline 13 to the oxygen-water separation unit 2. A flow rate adjusting valve 21 is provided on the return line 20, the flow rate adjusting valve 21 being for adjusting the flow rate of the return line 20 according to the flow rate value acquired by the flow rate acquisition unit 19.
As shown in fig. 1, one end of the return line 20 into which water is introduced is connected to the desalination line 13, and one end of the return line 20 into which water is introduced is located between the second cooling unit 18 and the multi-way valve 16, and the other end of the return line 20 out of which water is introduced is connected to the oxygen-water separation unit 2, so that a part of the upstream of the desalination line 13 and the return line 20 form a circulation line connected to the oxygen-water separation unit 2, and water in the oxygen-water separation unit 2 is circulated back to the oxygen-water separation unit 2 through a part of the upstream of the desalination line 13 and the return line 20, and cooled while passing through the second cooling unit 18. The water electrolyzed by the electrolysis unit 1 flows back into the oxygen-water separation unit 2, so that the temperature of the water in the oxygen-water separation unit 2 is raised, and the water inlet temperature of the electrolysis unit 1 has a certain requirement, so that the second cooling unit 18 and the circulating pipeline are arranged to cool the water in the oxygen-water separation unit 2, and the water temperature in the oxygen-water separation unit 2 can meet the water inlet temperature requirement of the electrolysis unit 1.
Meanwhile, since the water inlet temperature requirement of the desalination unit 14 is lower than the water inlet temperature requirement of the electrolysis unit 1, the second cooling unit 18 is arranged at the upstream of the first cooling unit 17 to form secondary cooling, one end of the water inlet of the return pipeline 20 is positioned between the second cooling unit 18 and the multi-way valve 16, water flowing out of the oxygen-water separation unit 2 is cooled firstly by the second cooling unit 18 to meet the water inlet temperature requirement of the electrolysis unit 1, then one part of the water flows back into the oxygen-water separation unit 2 through the return pipeline 20, and the other part of the water flows to the downstream part of the desalination pipeline 13 and is subjected to secondary cooling by the first cooling unit 17 to meet the water inlet temperature requirement of the desalination unit 14, so that the conductivity is reduced in the desalination unit 14.
The return line 20 is provided with a flow regulating valve 21, preferably a pneumatic regulating valve, the flow regulating valve 21 being adapted to regulate the flow of the return line 20. The desalting pipeline 13 is provided with a flow acquisition unit 19, the flow acquisition unit 19 is positioned at the downstream of the position where the desalting pipeline 13 is connected with the return pipeline 20, preferably positioned between the first cooling unit 17 and the parallel bypass pipeline and the pressure reducing valve 15, the flow acquisition unit 19 is preferably a flow meter, and the flow acquisition unit 19 is used for acquiring the flow for flowing into the desalting unit 14. The flow rate regulating valve 21 is electrically connected to the flow rate acquisition unit 19 so that the flow rate regulating valve 21 regulates the flow rate of the return line 20 according to the flow rate value acquired by the flow rate acquisition unit 19. Because the flow rate of the desalination unit 14 is smaller during operation, the return pipeline 20 also plays a role in diversion, so that the effect of reducing conductivity due to the influence of excessive water flowing to the desalination unit 14 is avoided, and the flow rate regulating valve 21 and the flow rate obtaining unit 19 are matched to regulate the flow rate of the return pipeline 20 so as to regulate the flow rate of water flowing into the desalination unit 14 and ensure the normal operation of the desalination unit 14.
In addition, since desalination unit 14 is also a device of the hydrogen production system, performance testing and reliability testing may also be performed on desalination unit 14 at the same time.
The first cooling unit 17 and the second cooling unit 18 are preferably heat exchangers, and the second water pump 25 is preferably provided between the oxygen-water separation unit 2 and the second cooling unit 18.
It will be appreciated that in other embodiments, the second temperature reduction unit may also be provided within or on the oxygen water separation unit.
In some embodiments, the hydrogen-water separation unit 5 communicates with the water supply unit such that water separated by the hydrogen-water separation unit 5 is supplied into the water supply unit.
As shown in fig. 1, the hydrogen-water separation unit 5 is communicated with the water tank 10 through a pipeline, and the separated water from the hydrogen-water separation unit 5 flows into the water tank 10 for recycling.
In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.
Furthermore, the terms "first," "second," and the like, are used merely to distinguish between components and should not be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the utility model.
Claims (12)
1. A hydrogen production test system, comprising:
An electrolysis unit (1), the electrolysis unit (1) being for electrolyzing pure water and discharging a mixture of hydrogen and water and a mixture of oxygen and water;
an oxygen-water separation unit (2), the oxygen-water separation unit (2) being in communication with the electrolysis unit (1) for receiving a mixture of oxygen and water discharged from the electrolysis unit (1) to separate oxygen and water, and for supplying pure water to the electrolysis unit (1), the oxygen-water separation unit (2) having an oxygen vent;
a first pressure acquisition unit (3), the first pressure acquisition unit (3) being provided on the oxygen-water separation unit (2) for acquiring the pressure inside the oxygen-water separation unit (2);
a first pressure regulating unit (4), the first pressure regulating unit (4) being operable to regulate the opening of the oxygen vent for regulating the pressure within the oxygen water separation unit (2);
a hydrogen-water separation unit (5), the hydrogen-water separation unit (5) being in communication with the electrolysis unit (1) for receiving a mixture of hydrogen and water discharged from the electrolysis unit (1) to separate hydrogen and water;
a hydrogen discharge pipe (6), the hydrogen discharge pipe (6) being in communication with the hydrogen-water separation unit (5) for discharging the hydrogen gas separated by the hydrogen-water separation unit (5);
A second pressure acquisition unit (7), wherein the second pressure acquisition unit (7) is arranged on the hydrogen discharge pipeline (6) to acquire the pressure in the hydrogen discharge pipeline (6);
the second pressure adjusting unit (8), the second pressure adjusting unit (8) is arranged on the hydrogen discharging pipeline (6), and the second pressure adjusting unit (8) is used for adjusting the pressure in the hydrogen discharging pipeline (6).
2. The hydrogen production test system of claim 1, comprising a pressure equalization state and a differential pressure state;
in the pressure equalizing state, the pressure in the hydrogen discharging pipeline (6) has a first preset range, the second pressure regulating unit (8) regulates the pressure in the hydrogen discharging pipeline (6) according to the pressure acquired by the second pressure acquiring unit (7) so that the pressure in the hydrogen discharging pipeline (6) is in the first preset range, and the first pressure regulating unit (4) regulates the pressure in the oxygen-water separating unit (2) according to the pressure acquired by the first pressure acquiring unit (3) and the pressure acquired by the second pressure acquiring unit (7) so that the pressure in the oxygen-water separating unit (2) approaches the pressure acquired by the second pressure acquiring unit (7) in real time;
in the differential pressure state, the pressure in the hydrogen discharge pipeline (6) has a second preset range, the second pressure regulating unit (8) regulates the pressure in the hydrogen discharge pipeline (6) according to the pressure acquired by the second pressure acquiring unit (7) so that the pressure in the hydrogen discharge pipeline (6) is in the second preset range, and the first pressure regulating unit (4) is opened so that the inside of the oxygen-water separation unit (2) is at normal pressure.
3. The hydrogen production test system according to claim 2, further comprising a purification device (9), the purification device (9) being provided on the hydrogen discharge line (6);
the second pressure acquisition unit (7) comprises a first hydrogen pressure acquisition device (701) and a second hydrogen pressure acquisition device (702), wherein the first hydrogen pressure acquisition device (701) is positioned upstream of the purification device (9), and the second hydrogen pressure acquisition device (702) is positioned downstream of the purification device (9);
the second pressure adjusting unit (8) adjusts the pressure in the hydrogen discharging pipeline (6) according to the pressure acquired by the second hydrogen pressure acquirer (702), and in the pressure equalizing state, the first pressure adjusting unit (4) adjusts the pressure in the oxygen-water separation unit (2) according to the pressure acquired by the first pressure acquiring unit (3) and the pressure acquired by the first hydrogen pressure acquirer (701).
4. The hydrogen production test system according to claim 2, further comprising a water supply unit for supplying pure water to the oxygen-water separation unit (2).
5. The hydrogen production test system of claim 4, wherein the water supply unit comprises:
-a water tank (10), said water tank (10) being adapted to store pure water;
a high-pressure water pump (11), wherein the high-pressure water pump (11) is communicated with the water tank (10) and the oxygen-water separation unit (2) and is used for pumping pure water stored in the water tank (10) into the oxygen-water separation unit (2) in the pressure equalizing state;
the normal pressure water pump (12), normal pressure water pump (12) intercommunication water tank (10) with oxygen water separation unit (2) is used for in the differential pressure state with the pure water pump that water tank (10) stored in oxygen water separation unit (2), normal pressure water pump (12) with high-pressure water pump (11) are parallelly connected, just the pump water pressure of normal pressure water pump (12) is less than the pump water pressure of high-pressure water pump (11).
6. The hydrogen production test system of claim 5, further comprising:
a desalination pipeline (13), wherein the desalination pipeline (13) communicates the oxygen-water separation unit (2) with the water tank (10) so that water in the oxygen-water separation unit (2) enters the water tank (10);
and the desalting unit (14) is arranged on the desalting pipeline (13) and is used for reducing the conductivity of water in the desalting pipeline (13).
7. The hydrogen production test system of claim 6, further comprising:
A pressure reducing valve (15), the pressure reducing valve (15) is arranged on the desalination pipeline (13), and the pressure reducing valve (15) is positioned at the upstream of the desalination unit (14); and
a multi-way valve (16), wherein the multi-way valve (16) is provided with a first valve port, a second valve port and a third valve port, the first valve port and the second valve port are both arranged on the desalination pipeline (13), the multi-way valve (16) is positioned at the upstream of the pressure reducing valve (15), the third valve port is communicated with the desalination pipeline (13) through a bypass pipeline, and the bypass pipeline and the pressure reducing valve (15) are arranged in parallel;
in the pressure equalizing state, the first valve port and the second valve port are opened, and the third valve port is closed;
in the differential pressure state, the first valve port and the third valve port are opened, and the second valve port is closed.
8. The hydrogen production test system of claim 7, further comprising a first cooling unit (17), the first cooling unit (17) being disposed on the desalination line (13), and the first cooling unit (17) being located upstream of the desalination unit (14) from the bypass line.
9. The hydrogen production test system of claim 8, further comprising a second cooling unit (18), the second cooling unit (18) being disposed within the oxygen water separation unit (2) or in cyclic communication with the oxygen water separation unit (2) for reducing the temperature of the pure water within the oxygen water separation unit (2).
10. The hydrogen production test system according to claim 9, characterized in that the second cooling unit (18) is provided on the desalination line (13), and the second cooling unit (18) is located upstream of the multi-way valve (16) and the first cooling unit (17);
the hydrogen production test system further comprises:
the flow acquisition unit (19) is arranged on the desalination pipeline (13) and is positioned between the second cooling unit (18) and the desalination unit (14);
a return line (20), wherein one end of the return line (20) is communicated with the desalination line (13), one end of the return line (20) is positioned between the second cooling unit (18) and the multi-way valve (16) and is positioned at the upstream of the flow acquisition unit (19), the other end of the return line (20) is communicated with the oxygen-water separation unit (2), and the return line (20) is used for returning pure water in the desalination line (13) to the oxygen-water separation unit (2);
the flow regulating valve (21) is arranged on the return pipeline (20), and the flow regulating valve (21) is used for regulating the flow of the return pipeline (20) according to the flow value acquired by the flow acquisition unit (19).
11. The hydrogen production test system according to claim 4, wherein the hydrogen-water separation unit (5) is in communication with the water supply unit such that water separated by the hydrogen-water separation unit (5) is supplied into the water supply unit.
12. The hydrogen production test system according to claim 1, further comprising a first supply line and a third pressure acquisition unit (22), the first supply line communicating the electrolysis unit (1) and the hydrogen-water separation unit (5) to supply a mixture of hydrogen and water discharged from the electrolysis unit (1) to the hydrogen-water separation unit (5), the third pressure acquisition unit (22) being provided on the first supply line; and/or
The device also comprises a second supply pipeline and a fourth pressure acquisition unit (23), wherein the second supply pipeline is communicated with the electrolysis unit (1) and the oxygen-water separation unit (2) so as to supply the mixture of oxygen and water discharged by the electrolysis unit (1) into the oxygen-water separation unit (2), and the fourth pressure acquisition unit (23) is arranged on the second supply pipeline.
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| CN202222744256.6U CN218932321U (en) | 2022-10-18 | 2022-10-18 | Hydrogen production test system |
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| CN202222744256.6U CN218932321U (en) | 2022-10-18 | 2022-10-18 | Hydrogen production test system |
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