Miniature PEM water electrolysis hydrogen production device

Abstract

The utility model relates to the technical field of water electrolysis hydrogen production, in particular to a miniature PEM water electrolysis hydrogen production device which comprises an electrolytic bath, a gas-water separation tank and a constant-temperature tank, a gas-water separation system is arranged outside the gas-water separation tank, an electrolysis system is arranged between the electrolytic bath and the constant-temperature tank, and a water circulation system is arranged outside the constant-temperature tank. The gas-water separation system comprises a gas-water separation pressure sensor arranged at a pipeline between the electrolytic bath and the gas-water separation tank, the electrolysis system comprises two groups of pipelines connected between the electrolytic bath and the constant-temperature tank, and a return water temperature sensor is arranged in one group of pipelines; the water circulation system comprises a circulation pipeline connected with one side of the constant-temperature tank, an outlet of the circulation pipeline is connected with the constant-temperature tank, and the whole system is divided into a gas-water separation system, the water circulation system and an electrolytic bath system. And data such as the electrolytic bath state and the pipeline state can be collected in real time.

Description

Technical Field

[0001] The utility model relates to the technical field of water electrolysis hydrogen production, in particular to a micro PEM water electrolysis hydrogen production device. Background Art

[0002] PEM water electrolysis is used to decompose water into hydrogen and oxygen. It is achieved through a proton exchange membrane electrolysis cell, in which the electrolysis process is carried out in a proton exchange membrane. This membrane has a high selectivity and can only allow protons to pass through while preventing the mixing of hydrogen and oxygen. By using electricity as an energy source, PEM water electrolysis can produce pure hydrogen, which is a clean and sustainable energy production technology.

[0003] In the prior art, for example, a patent with publication number CN213708497U discloses a circulating water supply device and a hydrogen production device, including a water tank, a water outlet pipe, a water pump, a water supply pipe, a return pipe and a plurality of water supply components, each of which is used to connect a water-using device respectively, and the water supply component includes a water inlet pipe and a cut-off valve, one end of the water inlet pipe is connected to the water supply pipe, and the other end of the water inlet pipe is connected to the water-using device, and the cut-off valve is arranged on the water inlet pipe to control the on-off of the water inlet pipe, when the cut-off valve is opened, the water supply pipe supplies water to the water-using device, and when the cut-off valve is closed, the water supply pipe stops supplying water to the water-using device.

[0004] The above structure can realize the circulation of water in the water supply pipeline, but in the process of electrolyzing water to produce hydrogen, it is impossible to equip multiple systems of gas-water separation, water circulation, and electrolyzer at the same time, resulting in the inability to collect the electrolyzer status and other data in real time. Utility Model Content

[0005] In view of this, the purpose of the utility model is to propose a micro PEM water electrolysis hydrogen production device to solve the problem that in the process of water electrolysis hydrogen production, it is impossible to simultaneously equip multiple systems such as gas-water separation, water circulation, and electrolyzer, resulting in the inability to collect the electrolyzer status and other data in real time.

[0006] Based on the above purpose, the utility model provides a micro PEM water electrolysis hydrogen production device, including an electrolyzer, a gas-water separation tank and a constant temperature tank, wherein the electrolyzer, the gas-water separation tank and the constant temperature tank are interconnected through a pipeline, a gas-water separation system is arranged outside the gas-water separation tank, an electrolysis system is arranged between the electrolyzer and the constant temperature tank, and a water circulation system is arranged outside the constant temperature tank;

[0007] The gas-water separation system includes a gas-water separation pressure sensor arranged at the pipeline between the electrolyzer and the gas-water separation tank, a liquid level sensor 1 and a liquid level sensor 2 are arranged inside the gas-water separation tank, and a hydrogen discharge solenoid valve and a hydrogen water discharge solenoid valve are respectively arranged on the pipelines on both sides of the outside of the gas-water separation tank, a dryer is also arranged in the pipeline of the hydrogen discharge solenoid valve, and a pipeline on one side of the dryer is connected to the gas-water separation tank;

[0008] The electrolysis system includes two groups of pipes connected between the electrolytic cell and the thermostatic tank, one group of pipes is provided with a return water temperature sensor, the other group of pipes is provided with a water inlet pump, a water inlet solenoid valve and a water inlet pressure sensor in sequence, the thermostatic tank is provided with a third liquid level sensor, a fourth liquid level sensor and a fifth liquid level sensor, and a heating rod is provided at the bottom of the thermostatic tank;

[0009] The water circulation system includes a circulation pipe connected to one side of the thermostatic tank, the outlet of the circulation pipe is connected to the thermostatic tank, and a circulation solenoid valve, a circulation water pump, a radiator and a circulation pressure sensor are arranged in sequence in the circulation pipe. A water inlet pipe and a drainage pipe are also arranged at the bottom of the thermostatic tank, a water replenishment pump and a water replenishment solenoid valve are arranged in the water inlet pipe, and a drainage solenoid valve is arranged in the drainage pipe.

[0010] Preferably, a safety valve is provided at the pipe connection between the dryer and the gas-water separation tank.

[0011] Preferably, the gas-water separation pressure sensor is electrically connected to the safety valve, the gas-water separation pressure sensor controls the opening and closing of the safety valve, and the second liquid level sensor is electrically connected to the hydrogen water exhaust solenoid valve.

[0012] Preferably, a constant temperature sensor is also provided inside the constant temperature tank, and the constant temperature sensor is electrically connected to the heating rod.

[0013] Preferably, the liquid level sensor three, the liquid level sensor four and the liquid level sensor five are arranged in parallel, the liquid level sensor three is electrically connected to the water inlet pump and the water inlet solenoid valve, and the liquid level sensor five is electrically connected to the water discharge solenoid valve.

[0014] Preferably, the constant temperature sensor is electrically connected to the circulation solenoid valve.

[0015] The beneficial effects of the utility model are as follows: it breaks through the traditional PEM water electrolysis method of producing hydrogen, and introduces a gas-water separation system, a water circulation system, and an electrolyzer system on the original basis. The overall system is divided into: a gas-water separation system, a water circulation system, and an electrolyzer system that cooperate with each other, and is equipped with sensors to collect data such as the electrolyzer status and pipeline status in real time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a system diagram of the entire utility model.

[0018] The markings in the figure are: 1. Electrolyzer; 2. Gas-water separation tank; 3. Constant temperature tank; 4. Liquid level sensor 1; 5. Liquid level sensor 2; 6. Safety valve; 7. Dryer; 8. Hydrogen discharge solenoid valve; 9. Hydrogen discharge water solenoid valve; 10. Return water temperature sensor; 11. Constant temperature sensor; 12. Heating rod; 13. Liquid level sensor 3; 14. Liquid level sensor 4; 15. Liquid level sensor 5; 16. Water inlet pump; 17. Water inlet solenoid valve; 18. Water inlet pressure sensor; 19. Circulation solenoid valve; 20. Circulation water pump; 21. Radiator; 22. Circulation pressure sensor; 23. Water replenishment solenoid valve; 24. Water replenishment pump; 25. Drainage solenoid valve; 26. Gas-water separation pressure sensor. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0020] like Figure 1 As shown, a micro PEM water electrolysis hydrogen production device comprises an electrolyzer 1, a gas-water separation tank 2 and a constant temperature tank 3, wherein the electrolyzer 1, the gas-water separation tank 2 and the constant temperature tank 3 are interconnected through a pipeline, a gas-water separation system is arranged outside the gas-water separation tank 2, an electrolysis system is arranged between the electrolyzer 1 and the constant temperature tank 3, and a water circulation system is arranged outside the constant temperature tank 3;

[0021] The gas-water separation system includes a gas-water separation pressure sensor 26 arranged at the pipeline between the electrolytic cell 1 and the gas-water separation tank 2, a liquid level sensor 1 4 and a liquid level sensor 2 5 are arranged inside the gas-water separation tank 2, and a hydrogen discharge solenoid valve 8 and a hydrogen discharge water solenoid valve 9 are respectively arranged on the pipelines on both sides of the outside of the gas-water separation tank 2, a dryer 7 is also arranged in the pipeline of the hydrogen discharge solenoid valve 8, and a pipeline on one side of the dryer 7 is connected to the gas-water separation tank 2;

[0022] The electrolysis system includes two groups of pipes connected between the electrolytic cell 1 and the thermostatic tank 3, wherein a return water temperature sensor 10 is arranged in one group of pipes, and a water inlet pump 16, a water inlet solenoid valve 17 and a water inlet pressure sensor 18 are arranged in sequence in the other group of pipes, a liquid level sensor 3 13, a liquid level sensor 4 14 and a liquid level sensor 5 15 are arranged inside the thermostatic tank 3, and a heating rod 12 is arranged at the bottom of the thermostatic tank 3;

[0023] The water circulation system includes a circulation pipe connected to one side of the thermostatic tank 3, the outlet of the circulation pipe is connected to the thermostatic tank 3, and a circulation solenoid valve 19, a circulation water pump 20, a radiator 21 and a circulation pressure sensor 22 are sequentially arranged in the circulation pipe. A water inlet pipe and a drainage pipe are also respectively arranged at the bottom of the thermostatic tank 3. A water replenishment pump 24 and a water replenishment solenoid valve 23 are arranged in the water inlet pipe, and a drainage solenoid valve 25 is arranged in the drainage pipe.

[0024] In this embodiment, after starting the electrolysis, the water inlet solenoid valve 17 is opened, the water inlet pump 16 is started, and the water in the thermostatic tank 3 passes through the water inlet pump 16, the water inlet solenoid valve 17, and the water inlet pressure sensor 18 into the electrolytic cell 1 for electrolysis, thereby forming an electrolysis system;

[0025] The hydrogen produced by electrolysis will first pass through the gas-water separation pressure sensor 26 to enter the gas-water separation tank 2, and separate the water brought up with the hydrogen. Then, the hydrogen will be dried by the dryer 7. Finally, the hydrogen discharge solenoid valve 8 will be opened for inflation, and part of the water will be discharged through the hydrogen discharge solenoid valve 9, thus forming a gas-water separation system.

[0026] After the electrolyzed water comes out of the electrolytic cell 1, it will pass through the return water temperature sensor 10 and return to the constant temperature tank 3. The circulating solenoid valve 19, circulating water pump 20, radiator 21 and circulating pressure sensor 22 in the circulating pipeline inside the constant temperature tank 3 will dissipate heat. The liquid level sensor 13 inside the constant temperature tank 3 will monitor the internal water volume. When the water volume is insufficient, the water will be replenished through the water inlet pump 16 and the water inlet solenoid valve 17 to complete the water circulation system. The overall data such as the status of the electrolytic cell 1 and the pipeline status can be collected in real time.

[0027] As an implementation method, Figure 1 As shown, a safety valve 6 is provided at the pipe connection between the dryer 7 and the gas-water separation tank 2 .

[0028] Among them, the gas-water separation pressure sensor 26 is electrically connected to the safety valve 6, the gas-water separation pressure sensor 26 controls the opening and closing of the safety valve 6, and the liquid level sensor 25 is electrically connected to the hydrogen discharge water solenoid valve 9.

[0029] In this embodiment, the pipelines of the electrolytic cell 1 and the gas-water separation tank 2 are monitored by the gas-water separation pressure sensor 26. When the pressure on the pipeline is too high, the pressure is released through the safety valve 6 to achieve pipeline safety. If the liquid level inside the gas-water separation tank 2 is higher than the liquid level sensor 1 5, the hydrogen water discharge solenoid valve 9 is opened to drain water until the next time the liquid level of the gas-water separation tank 2 is higher than the liquid level sensor 1 4.

[0030] As an implementation method, Figure 1 As shown, a constant temperature sensor 11 is also provided inside the constant temperature tank 3 , and the constant temperature sensor 11 is electrically connected to the heating rod 12 .

[0031] In this embodiment, the constant temperature sensor 11 monitors the temperature inside the constant temperature tank 3, controls the heating rod 12 to heat, and at the same time cooperates with the return water temperature sensor 10 to detect the water flowing out of the electrolytic cell 1 to maintain the temperature inside the constant temperature tank 3.

[0032] As an implementation method, Figure 1 As shown, liquid level sensor three 13 , liquid level sensor four 14 and liquid level sensor five 15 are arranged in parallel, liquid level sensor three 13 is electrically connected to the water inlet pump 16 and the water inlet solenoid valve 17 , and liquid level sensor five 15 is electrically connected to the drain solenoid valve 25 .

[0033] In this embodiment, when the liquid level of the thermostatic tank 3 reaches the liquid level sensor five 15, the drain solenoid valve 25 is opened to drain water. When the liquid level of the thermostatic tank 3 reaches the liquid level sensor three 13, the water inlet pump 16 and the water inlet solenoid valve 17 are started to continue to replenish water to avoid water shortage and inability to electrolyze inside the thermostatic tank 3.

[0034] As an implementation method, Figure 1 As shown, the constant temperature sensor 11 is electrically connected to the circulation solenoid valve 19 .

[0035] In this embodiment, the internal temperature of the thermostatic tank 3 is monitored by the thermostatic temperature sensor 11. When the temperature is too high, the circulation solenoid valve 19 is controlled to open, the circulation water pump 20 is operated, and the radiator 21 is started to return to the thermostatic tank 3 through the circulation pressure sensor 22 to start cooling. When the temperature of the thermostatic tank 3 reaches the set value, the circulation solenoid valve 19, the circulation water pump 20, and the radiator 21 are closed.

[0036] Working principle: When in use, after starting electrolysis, the water inlet solenoid valve 17 is opened, the water inlet pump 16 is started, and the water in the thermostatic tank 3 passes through the water inlet pump 16, the water inlet solenoid valve 17, and the water inlet pressure sensor 18 into the electrolytic cell 1 for electrolysis, forming an electrolysis system;

[0037] The electrolyzed hydrogen will first pass through the gas-water separation pressure sensor 26 to enter the gas-water separation tank 2, and separate the water brought up with the hydrogen. Then, the hydrogen will be dried through the dryer 7, and finally the hydrogen discharge solenoid valve 8 will be opened for inflation. Part of the water will be discharged through the hydrogen discharge solenoid valve 9. At the same time, when the pressure on the pipeline is too high, it will be relieved through the safety valve 6 to achieve pipeline safety. If the liquid level inside the gas-water separation tank 2 is higher than the liquid level sensor 25, the hydrogen discharge solenoid valve 9 will be opened for drainage until the next time the liquid level of the gas-water separation tank 2 is higher than the liquid level sensor 14 to form a gas-water separation system.

[0038] After the electrolyzed water comes out of the electrolytic cell 1, it will pass through the return water temperature sensor 10 and return to the thermostatic tank 3. In the circulation pipeline inside the thermostatic tank 3, the internal temperature of the thermostatic tank 3 is monitored by the thermostatic temperature sensor 11. When the temperature is too high, the circulation solenoid valve 19 is controlled to open, the circulation water pump 20 is running, and the radiator 21 is started and returns to the thermostatic tank 3 through the circulation pressure sensor 22 to start cooling. When the temperature of the thermostatic tank 3 reaches the set value, the circulation solenoid valve 19, the circulation water pump 20, and the radiator 21 are closed. When the liquid level of the thermostatic tank 3 reaches the liquid level sensor five 15, the drain solenoid valve 25 is opened for drainage. When the liquid level of the thermostatic tank 3 reaches the liquid level sensor three 13, the water inlet pump 16 and the water inlet solenoid valve 17 are started to continue to replenish water to avoid water shortage in the thermostatic tank 3 and inability to electrolyze, and complete the water circulation system. The overall data such as the status of the electrolytic cell 1 and the pipeline status can be collected in real time, which can be used for teaching and stable hydrogen production.

[0039] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0040] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A micro PEM water electrolysis hydrogen production device, comprising an electrolyzer (1), a gas-water separation tank (2) and a constant temperature tank (3), wherein the electrolyzer (1), the gas-water separation tank (2) and the constant temperature tank (3) are interconnected through a pipeline, a gas-water separation system is arranged outside the gas-water separation tank (2), an electrolysis system is arranged between the electrolyzer (1) and the constant temperature tank (3), and a water circulation system is arranged outside the constant temperature tank (3), characterized in that: The gas-water separation system comprises a gas-water separation pressure sensor (26) arranged at a pipeline between an electrolytic cell (1) and a gas-water separation tank (2); a liquid level sensor 1 (4) and a liquid level sensor 2 (5) are arranged inside the gas-water separation tank (2); and pipelines on both sides of the outside of the gas-water separation tank (2) are respectively provided with a hydrogen discharge solenoid valve (8) and a hydrogen discharge water solenoid valve (9); a dryer (7) is further arranged in the pipeline of the hydrogen discharge solenoid valve (8); and a pipeline on one side of the dryer (7) is connected to the gas-water separation tank (2); The electrolysis system comprises two groups of pipes connected between an electrolytic cell (1) and a thermostatic tank (3), wherein a return water temperature sensor (10) is arranged in one group of pipes, and a water inlet pump (16), a water inlet solenoid valve (17) and a water inlet pressure sensor (18) are arranged in sequence in the other group of pipes, a liquid level sensor 3 (13), a liquid level sensor 4 (14) and a liquid level sensor 5 (15) are arranged inside the thermostatic tank (3), and a heating rod (12) is arranged at the bottom of the thermostatic tank (3); The water circulation system comprises a circulation pipeline connected to one side of a thermostatic tank (3), the outlet of the circulation pipeline being connected to the thermostatic tank (3), a circulation solenoid valve (19), a circulation water pump (20), a radiator (21) and a circulation pressure sensor (22) being arranged in sequence in the circulation pipeline, a water inlet pipeline and a water discharge pipeline being arranged at the bottom of the thermostatic tank (3), a water replenishment pump (24) and a water replenishment solenoid valve (23) being arranged in the water inlet pipeline, and a water discharge solenoid valve (25) being arranged in the water discharge pipeline.

2. A micro PEM water electrolysis hydrogen production device according to claim 1, characterized in that: A safety valve (6) is provided at the pipe connection between the dryer (7) and the gas-water separation tank (2).

3. A micro PEM water electrolysis hydrogen production device according to claim 2, characterized in that: The gas-water separation pressure sensor (26) is electrically connected to the safety valve (6), and the gas-water separation pressure sensor (26) controls the opening and closing of the safety valve (6). The second liquid level sensor (5) is electrically connected to the hydrogen discharge water electromagnetic valve (9).

4. A micro PEM water electrolysis hydrogen production device according to claim 1, characterized in that: A constant temperature sensor (11) is also arranged inside the constant temperature tank (3), and the constant temperature sensor (11) is electrically connected to the heating rod (12).

5. A micro PEM water electrolysis hydrogen production device according to claim 1, characterized in that: The liquid level sensor three (13), the liquid level sensor four (14) and the liquid level sensor five (15) are arranged in parallel, the liquid level sensor three (13) is electrically connected to the water inlet pump (16) and the water inlet solenoid valve (17), and the liquid level sensor five (15) is electrically connected to the water discharge solenoid valve (25).

6. A micro PEM water electrolysis hydrogen production device according to claim 3, characterized in that: The constant temperature sensor (11) is electrically connected to the circulation solenoid valve (19).

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