Miniature PEM water electrolysis hydrogen production control system

Abstract

The utility model relates to the technical field of water electrolysis hydrogen production, in particular to a miniature PEM water electrolysis hydrogen production control system which comprises an electrolytic bath, a water tank and a gas-water separation tank, a switching power supply is arranged outside the electrolytic bath, the switching power supply is arranged in a current adjustable mode, and an exhaust port and a drainage port are formed in the upper side and the lower side of the water tank respectively. A heating rod and a second temperature sensor are fixedly installed in the water tank, multiple sets of second liquid level sensors are arranged in the water tank, a circulating pipeline is arranged outside the water tank, and a heat dissipation unit is arranged in the circulating pipeline. A switching power supply is used for outputting different currents, a heating rod at the bottom of a water tank and a second temperature sensor are used for heating and temperature control, meanwhile, a heat dissipation unit of an external circulating pipeline of the water tank is used for cooling, a second pressure sensor monitors different changes of water pressure entering an electrolytic bath, and a first temperature sensor monitors changes of water temperature from the electrolytic bath. Therefore, the electrolytic efficiency of the electrolytic cell under different temperatures and different currents can be simulated.

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 control system. Background Art

[0002] PEM stands for proton exchange membrane. Proton exchange membrane water electrolysis to produce hydrogen is an advanced water electrolysis technology used to decompose water into hydrogen and oxygen. This technology 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.

[0003] In the prior art, for example, the patent with publication number CN220149686U discloses a temperature control system for an alkaline water electrolysis hydrogen production device, including: an alkaline water electrolysis device, a gas-liquid separation device, an alkaline liquid circulation device, a cooling unit, a heating unit, a waste heat recovery unit, an energy storage unit, a third on-off valve and a fourth on-off valve, the alkaline water electrolysis device is connected to the gas-liquid separation device, and the alkaline liquid output end of the gas-liquid separation device is connected to the alkaline liquid water electrolysis device through an alkaline liquid circulation device through an alkaline liquid circulation loop. The temperature control system for the alkaline water electrolysis hydrogen production device is also provided with a waste heat recovery unit for collecting heat and an energy storage unit for providing heat to the heating unit.

[0004] The above structure can realize convenient switching of each branch in the temperature control system and solve the temperature problem of multiple electrolyzers, but the cost of hydrogen production is high, and in the process of electrolyzing water to produce hydrogen, it is impossible to control the electrolysis efficiency and speed of the electrolyzer under different temperatures and currents. Utility Model Content

[0005] In view of this, the purpose of the utility model is to propose a micro PEM water electrolysis hydrogen production control system to solve the problem that the electrolysis efficiency and speed of the electrolytic cell cannot be controlled under different temperatures and currents during the process of water electrolysis hydrogen production.

[0006] Based on the above purpose, the utility model provides a micro PEM water electrolysis hydrogen production control system, including an electrolyzer, a water tank and a gas-water separation box, wherein the electrolyzer, the water tank and the gas-water separation box are all connected by pipelines, a switching power supply is arranged outside the electrolyzer, and the switching power supply is a current-adjustable setting, two groups of pipelines are connected between the electrolyzer and the water tank, one group of pipelines is provided with a temperature sensor 1, and the other group of pipelines is provided with a water pump 3, a solenoid valve 6 and a pressure sensor 2 in sequence;

[0007] The water tank is provided with an exhaust port and a drain port on the upper and lower sides respectively, and a solenoid valve 5 is provided on the pipe at the drain port. A heating rod and a temperature sensor 2 are fixedly installed in the water tank, and multiple groups of liquid level sensors 2 are provided inside the water tank. A water inlet is provided outside the water tank, and a water pump 2 and a solenoid valve 4 are provided on the pipe at the water inlet in sequence.

[0008] A circulation pipeline is arranged outside the water tank, the outlet and the inlet of the circulation pipeline are both connected to the water tank, and a heat dissipation unit is arranged inside the circulation pipeline;

[0009] A pressure sensor 1 is provided at the connection between the electrolytic cell and the gas-water separation box pipeline, a liquid level sensor 1 is provided inside the gas-water separation box, and an air outlet and a drain outlet are respectively provided on both sides of the gas-water separation box, a drying pipe and a solenoid valve 1 are sequentially provided in the pipeline at the air outlet, a safety valve is provided in the pipeline between the solenoid valve 1 and the drying pipe, a solenoid valve 2 is provided in the pipeline at the drain outlet, and the solenoid valve 1 is electrically connected to the liquid level sensor 1.

[0010] Preferably, at least three groups of liquid level sensors 2 are arranged in the water tank, and the heights of the multiple groups of liquid level sensors 2 are arranged in an increasing manner. The liquid level sensor 2 is electrically connected to the solenoid valve 4 and the water pump 2.

[0011] Preferably, the heat dissipation unit comprises a solenoid valve three, a water pump one, a heat dissipation module and a one-way valve which are arranged in the circulation pipeline in sequence from the outlet.

[0012] Preferably, the temperature sensor 2 is electrically connected to the solenoid valve 3, and the temperature sensor 2 is connected in series with the solenoid valve 3, the water pump 1, the heat dissipation module and the one-way valve.

[0013] Preferably, the pressure sensor 1 is electrically connected to the safety valve, and the pressure sensor 1 monitors the pipeline pressure coming out of the electrolytic cell.

[0014] Preferably, the water tank, water pump three, solenoid valve six, pressure sensor two, electrolytic cell and temperature sensor one form an electrolysis cycle, pressure sensor two monitors the change of water pressure entering the electrolytic cell, and temperature sensor one monitors the water temperature coming out of the electrolytic cell.

[0015] The beneficial effects of the utility model are as follows: when it is necessary to simulate and control different temperatures, a switching power supply is used to output different currents, and the heating rod at the bottom of the water tank and the second temperature sensor are used for heating and temperature control. At the same time, the heat dissipation unit of the external circulation pipe of the water tank is used for cooling to maintain the temperature of the water tank. The different changes in the water pressure entering the electrolyzer are monitored by the second pressure sensor, and the temperature sensor one monitors the changes in the water temperature coming out of the electrolyzer, thereby simulating the electrolysis efficiency of the electrolyzer at different temperatures and different currents. Hydrogen production only requires power on and water addition, and the cost of hydrogen production is low. The module is small in size and can produce hydrogen anytime and anywhere. 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 structure diagram of the whole utility model;

[0018] Figure 2 For this utility model Figure 1 A magnified structural diagram of part A.

[0019] The markings in the figure are: 1. electrolytic cell; 2. water tank; 3. gas-water separation box; 4. solenoid valve one; 5. solenoid valve two; 6. solenoid valve three; 7. solenoid valve four; 8. solenoid valve five; 9. solenoid valve six; 10. pressure sensor one; 11. pressure sensor two; 12. temperature sensor one; 13. temperature sensor two; 14. water pump one; 15. water pump two; 16. water pump three; 17. drying tube; 18. heat dissipation module; 19. safety valve; 20. one-way valve; 21. heating rod; 22. switching power supply; 23. liquid level sensor one; 24. liquid level sensor two. DETAILED DESCRIPTION

[0020] 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.

[0021] like Figure 1 As shown, a micro PEM water electrolysis hydrogen production control system includes an electrolyzer 1, a water tank 2 and a gas-water separation box 3, wherein the electrolyzer 1, the water tank 2 and the gas-water separation box 3 are connected by pipelines, a switching power supply 22 is arranged outside the electrolyzer 1, and the switching power supply 22 is a current-adjustable setting, and two groups of pipelines are connected between the electrolyzer 1 and the water tank 2, wherein one group of pipelines is provided with a temperature sensor 12, and the other group of pipelines is provided with a water pump 3 16, a solenoid valve 6 9 and a pressure sensor 2 11 in sequence;

[0022] The water tank 2 is provided with an exhaust port and a drain port on the upper and lower sides respectively, and a solenoid valve 5 8 is provided on the pipe at the drain port. A heating rod 21 and a temperature sensor 2 13 are fixedly installed in the water tank 2, and multiple groups of liquid level sensors 2 24 are provided inside the water tank 2. A water inlet is provided outside the water tank 2, and a water pump 2 15 and a solenoid valve 4 7 are provided on the pipe at the water inlet in sequence.

[0023] A circulation pipeline is arranged outside the water tank 2, the outlet and the inlet of the circulation pipeline are both connected to the water tank 2, and a heat dissipation unit is arranged inside the circulation pipeline;

[0024] A pressure sensor 10 is provided at the connection between the electrolytic cell 1 and the gas-water separation box 3, a liquid level sensor 23 is provided inside the gas-water separation box 3, and an air outlet and a drain outlet are provided on both sides of the gas-water separation box 3, a drying pipe 17 and a solenoid valve 4 are provided in sequence in the pipeline at the air outlet, a safety valve 19 is provided in the pipeline between the solenoid valve 4 and the drying pipe 17, a solenoid valve 5 is provided in the pipeline at the drain outlet, and the solenoid valve 4 is electrically connected to the liquid level sensor 23.

[0025] In this embodiment, the required current is provided to the electrolytic cell 1 through the switching power supply 22. After the electrolysis is started, the solenoid valve 69 is opened, the water pump 3 16 is started, and the water in the water tank 2 enters the electrolytic cell 1 through the water pump 3 16, the solenoid valve 69, and the pressure sensor 2 11 for electrolysis. The hydrogen produced by the electrolysis will enter the gas-water separation box 3 through the pressure sensor 10, and the water brought up with the hydrogen will be separated into gas and water, and then the hydrogen will be dried through the drying tube 17. Finally, the solenoid valve 14 is opened for inflation, and the electrolyzed water will return to the water tank 2 through the temperature sensor 12 after coming out of the electrolytic cell 1, and the electrolyzed air will also return to the water tank 2 and be discharged through the exhaust port.

[0026] When it is necessary to simulate different temperatures, the switching power supply 22 is used to output different currents, and the heating rod 21 and the temperature sensor 13 at the bottom of the water tank 2 are used for heating and temperature control. At the same time, the heat dissipation unit of the external circulation pipeline of the water tank 2 is used to cool down and maintain the temperature of the water tank 2. The pressure sensor 11 is used to monitor the different changes in the water pressure entering the electrolytic cell 1, and the temperature sensor 12 is used to monitor the changes in the water temperature coming out of the electrolytic cell 1, so that the electrolysis efficiency of the electrolytic cell 1 at different temperatures can be simulated.

[0027] As an implementation method, Figure 2 As shown, at least three groups of liquid level sensors 24 are arranged in the water tank 2, and the heights of the multiple groups of liquid level sensors 24 are arranged in an increasing manner. The liquid level sensors 24 are electrically connected to the solenoid valve 47 and the water pump 2 15.

[0028] In this embodiment, when the liquid level of the water tank 2 reaches the highest group of the liquid level sensors 24, the water pump 2 15 stops running and the solenoid valve 4 7 is closed. When the liquid level is lower than the lowest group of the liquid level sensors 24, the solenoid valve 4 7 opens and the water pump 2 15 continues to replenish water to avoid water shortage and inability to electrolyze inside the water tank 2.

[0029] As an implementation method, Figure 2 As shown, the heat dissipation unit includes a solenoid valve 3 6, a water pump 14, a heat dissipation module 18 and a one-way valve 20 arranged in the circulation pipeline from the outlet in sequence;

[0030] Among them, the temperature sensor 2 13 is electrically connected to the solenoid valve 3 6 , and the temperature sensor 2 13 is connected in series with the solenoid valve 3 6 , the water pump 1 14 , the heat dissipation module 18 and the one-way valve 20 .

[0031] In this embodiment, a closed loop is formed by the water tank 2, the solenoid valve three 6, the water pump one 14, the heat dissipation module 18, and the one-way valve 20 of the water tank 2. The internal temperature of the water tank 2 is monitored by the temperature sensor two 13. When the temperature is too high, the solenoid valve three 6 is controlled to open, the water pump one 14 is operated, and the heat dissipation module 18 is started to return to the water tank 2 through the one-way valve 20 to start cooling. When the temperature reaches the set value, the solenoid valve two 5, the water pump one 14, and the heat dissipation module 18 are closed in sequence to achieve a cooling effect.

[0032] As an implementation method, Figure 1 As shown, the pressure sensor 10 is electrically connected to the safety valve 19 , and the pressure sensor 10 monitors the pipeline pressure coming out of the electrolytic cell 1 .

[0033] In this embodiment, the electrolytic cell 1 and the gas-water separation box 3 pipeline are monitored by a pressure sensor 10. When the pressure on the pipeline is too high, the pressure is released through a safety valve 19 to achieve pipeline safety. If the liquid level inside the gas-water separation box 3 is higher than the liquid level sensor 23, the solenoid valve 25 is opened to drain water until the next time the liquid level in the gas-water separation box 3 is higher than the liquid level sensor 23.

[0034] As an implementation method, Figure 1 As shown, the water tank 2, the water pump 3 16, the solenoid valve 6 9, the pressure sensor 2 11, the electrolytic cell 1 and the temperature sensor 1 12 form an electrolysis cycle, the pressure sensor 2 11 monitors the change of the water pressure entering the electrolytic cell 1, and the temperature sensor 12 monitors the water temperature coming out of the electrolytic cell 1.

[0035] In this embodiment, after electrolysis, the solenoid valve six 9 is opened, the water pump three 16 is started, and the water in the water tank 2 enters the electrolytic cell 1 through the water pump three 16, the solenoid valve six 9, and the pressure sensor two 11 for electrolysis. The hydrogen produced by the electrolysis will enter the gas-water separation box 3 for treatment. After the water comes out of the electrolytic cell 1, it will pass through the temperature sensor one 12 and return to the water tank 2. The temperature of the temperature sensor one 12 and the temperature sensor two 13 are compared to check the water temperature change before and after electrolysis.

[0036] Working principle: When in use, the required current is provided to the electrolytic cell 1 through the switch power supply 22. After the electrolysis is started, the solenoid valve 69 is opened, the water pump 3 16 is started, and the water in the water tank 2 enters the electrolytic cell 1 through the water pump 3 16, the solenoid valve 69, and the pressure sensor 2 11 for electrolysis. 2H2O=2H2↑+O2↑ is energized, and the hydrogen produced by the electrolysis will enter the gas-water separation box 3 through the pressure sensor 10, and the water brought up with the hydrogen will be separated into gas and water, and then the hydrogen will be dried through the drying tube 17, and finally the solenoid valve 4 will be opened for inflation, and the electrolyzed water will return to the water tank 2 through the temperature sensor 12 after coming out of the electrolytic cell 1, and the electrolyzed air will also return to the water tank 2 and be discharged through the exhaust port;

[0037] Inside the water tank 2, the heating rod 21 and the temperature sensor 2 13 at the bottom of the water tank 2 are heated and temperature controlled, and the heat dissipation unit of the external circulation pipeline of the water tank 2 is used to cool down to maintain the temperature of the water tank 2. A heat dissipation cycle is formed from the water tank 2, the solenoid valve 3 6, the water pump 1 14, the heat dissipation module 18, and the one-way valve 20 water tank 2. The temperature inside the water tank 2 is monitored by the temperature sensor 2 13. When the temperature is too high, the solenoid valve 2 5 is controlled to open, the water pump 1 14 is running, and the heat dissipation module 18 is started to return to the water tank 2 through the one-way valve 20 to start cooling. When the temperature reaches the set value, the solenoid valve 2 5, the water pump 1 14, and the heat dissipation module 18 are closed in sequence to achieve a cooling effect. When the liquid level of the water tank 2 reaches the highest group of the liquid level sensor 2 24, the water pump 2 15 stops running, and the solenoid valve 4 7 is closed. When the liquid level is lower than the lowest group of the liquid level sensor 2 24, the solenoid valve 4 7 is opened, and the water pump 2 15 continues to run to replenish water to avoid water shortage and electrolysis inside the water tank 2;

[0038] When different temperatures need to be simulated, the switching power supply 22 is used to output different currents, and the pressure sensor 11 is used to monitor the different changes in the water pressure entering the electrolytic cell 1, and the temperature sensor 12 monitors the changes in the water temperature coming out of the electrolytic cell 1, so that the electrolysis efficiency of the electrolytic cell 1 at different temperatures can be simulated.

[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 control system, comprising an electrolyzer (1), a water tank (2) and a gas-water separation box (3), wherein the electrolyzer (1), the water tank (2) and the gas-water separation box (3) are all connected by pipelines, characterized in that: A switch power supply (22) is arranged outside the electrolytic cell (1), and the switch power supply (22) is a current-adjustable arrangement. Two groups of pipes are connected between the electrolytic cell (1) and the water tank (2), one group of pipes being provided with a temperature sensor (12), and the other group of pipes being provided with a water pump (16), a solenoid valve (9) and a pressure sensor (11) in sequence. The water tank (2) is provided with an exhaust port and a drain port at the upper and lower sides respectively, and a solenoid valve five (8) is provided in the pipeline at the drain port. A heating rod (21) and a temperature sensor two (13) are fixedly installed in the water tank (2), and a plurality of groups of liquid level sensors two (24) are provided inside the water tank (2). A water inlet is provided outside the water tank (2), and a water pump two (15) and a solenoid valve four (7) are provided in sequence in the pipeline at the water inlet. A circulation pipeline is arranged outside the water tank (2), the outlet and the inlet of the circulation pipeline are both connected to the water tank (2), and a heat dissipation unit is arranged inside the circulation pipeline; A pressure sensor (10) is provided at the connection point between the electrolytic cell (1) and the gas-water separation box (3), a liquid level sensor (23) is provided inside the gas-water separation box (3), and an air outlet and a water outlet are provided on both sides of the gas-water separation box (3), a drying pipe (17) and a solenoid valve (4) are provided in sequence on the pipe at the air outlet, a safety valve (19) is provided on the pipe between the solenoid valve (4) and the drying pipe (17), and a solenoid valve (5) is provided on the pipe at the water outlet, and the solenoid valve (4) and the liquid level sensor (23) are electrically connected.

2. A micro PEM water electrolysis hydrogen production control system according to claim 1, characterized in that: At least three groups of liquid level sensors 2 (24) are arranged in the water tank (2), and the heights of the multiple groups of liquid level sensors 2 (24) are arranged in an increasing manner. The liquid level sensors 2 (24) are electrically connected to the electromagnetic valve 4 (7) and the water pump 2 (15).

3. A micro PEM water electrolysis hydrogen production control system according to claim 1, characterized in that: The heat dissipation unit comprises a solenoid valve 3 (6), a water pump 1 (14), a heat dissipation module (18) and a one-way valve (20) which are arranged in sequence from the outlet in the circulation pipeline.

4. A micro PEM water electrolysis hydrogen production control system according to claim 3, characterized in that: The temperature sensor 2 (13) is electrically connected to the electromagnetic valve 3 (6), and the temperature sensor 2 (13) is connected in series with the electromagnetic valve 3 (6), the water pump 1 (14), the heat dissipation module (18) and the one-way valve (20).

5. A micro PEM water electrolysis hydrogen production control system according to claim 1, characterized in that: The pressure sensor 1 (10) is electrically connected to the safety valve (19), and the pressure sensor 1 (10) monitors the pressure of the pipeline coming out of the electrolytic cell (1).

6. A micro PEM water electrolysis hydrogen production control system according to claim 1, characterized in that: The water tank (2), water pump three (16), solenoid valve six (9), pressure sensor two (11), electrolytic cell (1) and temperature sensor one (12) form an electrolysis cycle, pressure sensor two (11) monitors the change of water pressure entering the electrolytic cell (1), and temperature sensor one (12) monitors the temperature of water coming out of the electrolytic cell (1).

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