Water electrolysis hydrogen production device

Abstract

The present invention relates to the technical field of electrolytic hydrogen production, in particular to a water electrolytic hydrogen production device, comprising at least one hydrogen production module, each hydrogen production module is equipped with at least one electrolyzer, each electrolyzer is equipped with two electrolyte storage tanks, the electrolyzer is provided with a hydrogen delivery main pipe, an oxygen delivery main pipe, an electrolyte output main pipe and an electrolyte input main pipe, a distribution valve 1 is connected to the reflux port of the electrolyte storage tank through a pipeline, the water outlet of one electrolyte storage tank is connected to the electrolyte input main pipe through an electrolyte delivery pipe 1, a concentration sensor 2, a distribution valve 6 and a distribution valve 7 are provided on the electrolyte delivery pipe 1, and the water outlet of another electrolyte storage tank is connected to the distribution valve 7 through an electrolyte delivery pipe 2, and a concentration sensor 3 is provided on the electrolyte delivery pipe 2. Through a finely designed electrolyte circulation system, efficient utilization and concentration control of the electrolyte are achieved, and the stability and efficiency of the water electrolytic hydrogen production process are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of electrolytic hydrogen production, and in particular to a water electrolytic hydrogen production device. Background Art

[0002] As a clean and efficient energy carrier, hydrogen is gradually becoming an important part of the global energy transformation and sustainable development strategy.

[0003] Among the many hydrogen production technologies, electrolysis is highly favored because of its environmental protection, flexibility and sustainability. The basic principle of water electrolysis is to use electricity to decompose water molecules into hydrogen and oxygen. The whole process does not produce harmful substances, and the raw water resources are abundant and can be supplied almost infinitely. With the rapid development and cost reduction of renewable energy (such as solar energy and wind energy), it has become possible to use renewable energy to generate electricity for water electrolysis to produce hydrogen, which not only realizes the green transformation of energy, but also promotes the consumption and storage of renewable energy.

[0004] At present, in the process of producing hydrogen by electrolysis of water, the gas-liquid mixture on the hydrogen side and the gas-liquid mixture on the oxygen side produced by electrolysis in the electrolyzer enter their respective gas-liquid separators. The electrolyte separated by the gas-liquid separators merges and enters the heat exchanger for cooling, and then is returned to the electrolyzer. Since water molecules are continuously decomposed into hydrogen and oxygen during the electrolysis process, the water content in the electrolyte is continuously reduced. Even if there is a supplement of reflux liquid, the electrolyte concentration in the electrolyzer will gradually increase.

[0005] As the electrolyte concentration increases, the ion concentration in the electrolyte will also increase accordingly, the interaction between ions will be enhanced, the resistance will increase, and the migration of ions in the electrolyte will become difficult. When the current passes through the electrolyte, more heat will be generated instead of being used for the electrolysis reaction, thereby reducing the electrolysis efficiency. Too high electrolyte concentration will also aggravate the corrosion of the electrolytic cell material and shorten the equipment life. Summary of the invention

[0006] The purpose of the present invention is to provide a water electrolysis hydrogen production device, which realizes efficient utilization and concentration control of the electrolyte through a carefully designed electrolyte circulation system, thereby ensuring the stability and efficiency of the water electrolysis hydrogen production process.

[0007] In order to solve the above technical problems, the present invention provides a water electrolysis hydrogen production device, comprising at least one hydrogen production module, each of the hydrogen production modules is equipped with at least one electrolyzer, and each of the electrolyzers is equipped with two electrolyte storage tanks; the electrolyzer is provided with a hydrogen delivery main pipe, an oxygen delivery main pipe, an electrolyte output main pipe and an electrolyte input main pipe, and the water inlet of the electrolyte storage tank is connected to a premixer;

[0008] The electrolyte output main pipe is connected to the electrolyte output pipe, and the electrolyte output pipe is sequentially provided with a concentration sensor 1 and a distribution valve 1 along the conveying path, and the distribution valve 1 is respectively connected to the reflux ports of two electrolyte storage tanks through two pipelines; the water outlet of one of the electrolyte storage tanks is connected to the electrolyte input main pipe through the electrolyte delivery pipe 1, and the electrolyte delivery pipe 1 is sequentially provided with a concentration sensor 2, a distribution valve 6 and a distribution valve 7 along the conveying path, and the distribution valve 6 is connected to an alkali solution discharge pipe 1, and the water outlet of the other electrolyte storage tank is connected to the distribution valve 7 through the electrolyte delivery pipe 2, and the distribution valve 7 is connected to the alkali solution discharge pipe 2, and the electrolyte delivery pipe 2 is provided with a concentration sensor 3.

[0009] Preferably, the premixer comprises an upper cavity and a lower cavity which are installed in a snap-fitting manner, the bottom of the lower cavity is provided with a liquid outlet connected to a water inlet, a plurality of groups of vertically arranged baffles are fixed in the inner cavity of the lower cavity, the outer wall of the lower cavity is provided with a jacket, a heat medium outlet and a heat medium inlet are provided on one side of the jacket, a solid material inlet facing the baffle is provided in the middle of the top of the upper cavity, and a liquid inlet connected to the solid material inlet is provided on one side of the upper cavity.

[0010] Preferably, the flow blocking member includes an upper circular plate and a lower circular plate with a center hole, the diameter of the lower circular plate is consistent with the cavity diameter of the lower cavity, the aperture of the center hole is smaller than the diameter of the upper circular plate, and both the upper circular plate and the lower circular plate are provided with circumferentially distributed water leakage holes, the upper circular plate is installed on the upper surface of the lower circular plate through multiple groups of support columns, and the outer edge of the upper circular plate and the edge of the center hole of the lower circular plate are provided with annular closed water retaining weirs.

[0011] Preferably, the hydrogen production module also includes a material distributor and a pure water delivery pipe, the pure water delivery pipe is provided with a distribution valve three, the distribution valve three is respectively connected to the liquid inlets of the two premixers through pipelines, and the discharge end of the material distributor is respectively connected to the solid material inlets of the two premixers through pipelines.

[0012] Preferably, the hydrogen production module also includes a steam input pipe and a steam output pipe, the steam input pipe is provided with a distribution valve 2, the steam output pipe is provided with a distribution valve 4, a partition is provided inside the electrolyte storage tank, a heating coil is provided under the partition, and both ends of the heating coil are respectively provided with a heat medium input pipe and a heat medium output pipe that pass through the partition and extend to the outside of the electrolyte storage tank, the heat medium input pipes of the two electrolyte storage tanks are connected to the distribution valve 2 through a pipeline, and the heat medium output pipes of the two electrolyte storage tanks are connected to the distribution valve 4 through a steam pipeline.

[0013] Preferably, two groups of distribution valves five are provided on the steam pipeline, wherein one of the distribution valves five is connected to the heat medium inlet through a pipeline, and the other distribution valve five is connected to the heat medium outlet through a pipeline.

[0014] Preferably, a plurality of ultrasonic transducers are arranged on the partition.

[0015] Preferably, end plates are provided at both ends of the outside of the electrolytic cell, and anode plates and cathode plates are provided at both ends of the inside of the electrolytic cell, respectively; an anode chamber is formed between the anode plate and the end plate on the same side, and a cathode chamber is formed between the cathode plate and the end plate on the same side; the chamber between the anode plate and the cathode plate is divided into a plurality of independent bipolar chambers by a plurality of groups of bipolar plates; a diaphragm is provided in the middle of each bipolar chamber; overflow ports are provided at one side of the anode chamber, the cathode chamber and the bipolar chamber, and the overflow ports are connected to the electrolyte output main pipe through a pipeline; liquid inlets are provided at the bottom of the anode chamber, the cathode chamber and the bipolar chamber, and the liquid inlets are connected to the electrolyte input main pipe through a pipeline; oxygen outlets are provided at the top of the anode chamber and one side of the top of the bipolar chamber, and the oxygen outlets are connected to the oxygen delivery main pipe through an oxygen pipe; hydrogen outlets are provided at the top of the cathode chamber and the other side of the top of the bipolar chamber, and the hydrogen outlets are connected to the hydrogen delivery main pipe through a hydrogen pipe.

[0016] Preferably, a hydrogen concentration sensor is provided at the end of the hydrogen delivery main pipe, and an oxygen concentration sensor is provided at the end of the oxygen delivery main pipe.

[0017] After adopting the above technical solution, the beneficial effects of the present invention are:

[0018] The present invention realizes efficient utilization and concentration control of electrolyte through a finely designed electrolyte circulation system. By setting up multiple concentration sensors and distribution valves, the device can flexibly respond to the needs under different working conditions and ensure the stability and efficiency of the electrolysis process. At the same time, the configuration of two electrolyte storage tanks also improves the reliability and flexibility of the system, so that when one storage tank has a problem, the other storage tank can take over the work to ensure the continuity of the hydrogen production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in 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 described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a premixer;

[0022] Figure 3 is a schematic diagram of the structure of the spoiler;

[0023] Figure 4 is a schematic diagram of the structure of the electrolyte storage tank;

[0024] Figure 5 Schematic diagram of the structure of the electrolytic cell.

[0025] In the figure: 1-electrolyzer, 2-concentration sensor 1, 3-electrolyte output pipe, 4-distribution valve 1, 5-distribution valve 2, 6-material distributor, 7-material delivery pipe, 8-pure water delivery pipe, 9-distribution valve 3, 10-steam input pipe, 11-distribution valve 4, 12-steam output pipe, 13-premixer, 14-distribution valve 5, 15-electrolyte storage tank, 16-concentration sensor 2, 17-electrolyte delivery pipe 1, 18-concentration sensor 3, 19-distribution valve 6, 20-electrolyte delivery pipe 2, 21-distribution valve 7, 22-upper cavity, 23-solid material inlet, 24-liquid inlet, 25-lower cavity, 26-blocking member, 27- Liquid outlet, 28-heat medium inlet, 29-jacket, 30-heat medium outlet, 31-upper circular plate, 32-support column, 33-lower circular plate, 34-water weir, 35-leakage hole, 36-heat medium input pipe, 37-water outlet, 38-ultrasonic transducer, 39-heating coil, 40-partition, 41-heat medium output pipe, 42-water inlet, 43-reflux port, 44-anode plate, 45-overflow port, 46-hydrogen delivery main pipe, 47-oxygen delivery main pipe, 48-hydrogen pipe, 49-electrolyte output main pipe, 50-oxygen pipe, 51-cathode plate, 52-bipolar plate, 53-diaphragm, 54-electrolyte input main pipe, 55-end plate. DETAILED DESCRIPTION

[0026] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain the present invention and are not configured to limit the present invention. For those skilled in the art, the present invention can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present invention by illustrating examples of the present invention.

[0027] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of the present invention. In the description of the present invention, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] like Figures 1 to 5 As shown, an embodiment of the present invention provides a water electrolysis hydrogen production device, which includes at least one hydrogen production module, each hydrogen production module is equipped with at least one electrolyzer 1, and each electrolyzer 1 is equipped with two closed electrolyte storage tanks 15. The closed electrolyte storage tank 15 can effectively prevent the electrolyte from contacting the external environment, reducing pollution and evaporation loss.

[0029] The electrolyzer 1 is provided with a hydrogen delivery manifold 46, an oxygen delivery manifold 47, an electrolyte output manifold 49 and an electrolyte input manifold 54. The end of the hydrogen delivery manifold 46 is provided with a hydrogen concentration sensor not shown, and the end of the oxygen delivery manifold 47 is provided with an oxygen concentration sensor not shown. The outer ends of the electrolyzer 1 are provided with end plates 55, and the inner ends of the electrolyzer 1 are provided with anode plates 44 and cathode plates 51, respectively. The anode plate 44 and the end plate 55 on the same side form an anode chamber, and the cathode plate 51 and the end plate 55 on the same side form a cathode chamber. The chamber between the anode plate 44 and the cathode plate 51 is divided into a plurality of independent bipolar chambers by a plurality of groups of bipolar plates 52. Under the total potential of the anode plate 44 and the cathode plate 51, the intermediate bipolar plates 52 evenly distribute the potential, so that each bipolar chamber forms an electrolytic cell with an anode and a cathode.

[0030] A diaphragm 53 is provided in the middle of each bipolar chamber to prevent the hydrogen generated on both sides of the bipolar chamber from mixing with the oxygen. The diaphragm 53 has a low resistance to ions and is permeable to the electrolyte. During the electrolysis process, ions (such as hydrogen ions and hydroxide ions) can relatively easily pass through the diaphragm 53 and migrate between the cathode and the anode, thereby completing the electrolysis reaction.

[0031] Overflow ports 45 are provided on one side of the anode chamber, cathode chamber and bipolar chamber, and these overflow ports 45 are connected to the electrolyte output main pipe 49 through pipelines. Liquid inlets are provided at the bottom of the anode chamber, cathode chamber and bipolar chamber, and these liquid inlets are connected to the electrolyte input main pipe 54 through pipelines. Oxygen outlets are provided on the top of the anode chamber and one side of the top of the bipolar chamber, and these oxygen outlets are connected to the oxygen delivery main pipe 47 through oxygen pipes 50. Hydrogen outlets are provided on the top of the cathode chamber and the other side of the top of the bipolar chamber, and these hydrogen outlets are connected to the hydrogen delivery main pipe 46 through hydrogen pipes 48. The overflow port 45 is located at a height lower than the hydrogen outlet and the oxygen outlet to ensure that the generated gas can be smoothly discharged from the electrolytic cell 1 to avoid overflow of the electrolyte.

[0032] The water outlet 37 and the water inlet 42 are respectively located on both sides of the electrolyte storage tank 15, and are used for the circulation of the electrolyte in and out, ensuring the flow and renewal of the electrolyte in the system. The water inlet 42 of the electrolyte storage tank 15 is connected to the premixer 13, and the premixer 13 includes an upper cavity 22 and a lower cavity 25, which are combined together by a snap-fit ​​installation method to form a closed mixing space.

[0033] A solid material inlet 23 for introducing electrolyte is provided in the middle of the top of the upper cavity 22, and a liquid inlet 24 connected to the solid material inlet 23 is provided on one side of the upper cavity 22. A jacket 29 is provided on the outer wall of the lower cavity 25, and a heat medium outlet 30 and a heat medium inlet 28 are provided on one side of the jacket 29. Multiple groups of baffles 26 arranged vertically and facing the solid material inlet 23 are fixed in the inner cavity of the lower cavity 25, and a liquid outlet 27 connected to the water inlet 42 is provided at the bottom of the lower cavity 25. The function of these baffles 26 is to increase the flow path and turbulence of liquid and solid materials during the mixing process, thereby improving the mixing effect.

[0034] The flow blocker 26 includes an upper circular plate 31 and a lower circular plate 33 with a center hole. The diameter of the lower circular plate 33 is consistent with the cavity diameter of the lower cavity 25, and the diameter of the center hole is smaller than the diameter of the upper circular plate 31. The upper circular plate 31 and the lower circular plate 33 are both provided with circumferentially distributed water leakage holes 35, and the outer edge of the upper circular plate 31 and the edge of the center hole of the lower circular plate 33 are both provided with annular closed water retaining weirs 34. The upper circular plate 31 is installed on the upper surface of the lower circular plate 33 through multiple groups of support columns 32, ensuring a fixed distance between the upper and lower circular plates, thereby forming a specific flow channel structure.

[0035] In this device, the design of the material distributor 6 and the pure water delivery pipe 8 further ensures that the electrolyte and pure water can be accurately and efficiently delivered to the two premixers 13 to meet the raw material requirements of the electrolysis process. The material distributor 6 distributes the electrolyte stored in the silo to the solid material inlet 23 of the two premixers 13 through the material delivery pipe 7 according to a predetermined ratio or weight, and the pure water delivery pipe 8 distributes pure water from a water source (water tank, pool, etc.) to the liquid inlet 24 of the two premixers 13 through a pipeline. A distribution valve 3 9 is provided on the pure water delivery pipe 8, and the opening and closing degree of its internal channel is adjusted as needed, thereby controlling the pure water flow to each premixer 13.

[0036] The electrolyte output main pipe 49 is connected to the electrolyte output pipe 3, and the electrolyte output pipe 3 is sequentially provided with a concentration sensor 2 and a distribution valve 4 along the conveying path, and the distribution valve 4 is respectively connected to the reflux ports 43 of the two electrolyte storage tanks 15 through two pipelines. The water outlet 37 of one electrolyte storage tank 15 is connected to the electrolyte input main pipe 54 through the electrolyte delivery pipe 17, and the electrolyte delivery pipe 17 is sequentially provided with a concentration sensor 2 16, a distribution valve 6 19 and a distribution valve 7 21 along the conveying path, and the distribution valve 6 19 is connected to the alkali solution discharge pipe 1. The water outlet 37 of the other electrolyte storage tank 15 is connected to the distribution valve 7 21 through the electrolyte delivery pipe 20, and the distribution valve 7 21 is connected to the alkali solution discharge pipe 2, and the electrolyte delivery pipe 20 is provided with a concentration sensor 3 18.

[0037] The partition 40 divides the internal space of the electrolyte storage tank 15 into two independent parts, upper and lower. A plurality of ultrasonic transducers 38 are arranged above the partition 40, and a heating coil 39 is arranged below the partition 40. The two ends of the heating coil 39 are respectively provided with a heat medium input pipe 36 and a heat medium output pipe 41 that pass through the partition 40 and extend to the outside of the electrolyte storage tank 15. The heat medium input pipes 36 of the two electrolyte storage tanks 15 are connected to the steam input pipe 10 through a pipeline, and a distribution valve 25 is arranged at the junction. The heat medium output pipes 41 of the two electrolyte storage tanks 15 are connected to the steam output pipe 12 through a steam pipeline, and a distribution valve 41 is arranged at the junction. Two groups of distribution valves 514 are arranged on the steam pipeline, one of which is connected to the heat medium inlet 28 through a pipeline, and the other distribution valve 514 is connected to the heat medium outlet 30 through a pipeline.

[0038] In the process of electrolytic hydrogen production using the device, generally only one electrolyte storage tank 15 is working, and the other electrolyte storage tank 15 is on standby to intervene when the electrolyte storage tank 15 fails. Figure 1 As shown, the operation of the electrolyte storage tank 15 on the right is taken as an example.

[0039] During electrolysis, under the control of the control module (not shown), the pure water at the water source is first pumped to the premixer 13 through the pure water delivery pipe 8 (the port of the distribution valve 39 leading to the left electrolyte storage tank 15 is closed), and then enters the electrolyte storage tank 15. After the liquid level sensor (not shown) of the electrolyte storage tank 15 detects that the liquid level reaches the first set height, the steam from the boiler room is delivered to the heat medium input pipe 36 through the steam input pipe 10. These steams then enter the heating coil 39, and heat exchange with the pure water in the electrolyte storage tank 15 in the coil to heat the pure water. While heating, the material distributor 6 delivers the sodium hydroxide from the silo as the electrolyte to the premixer 13 through pneumatic conveying along the material conveying pipe 7. After being blocked and decelerated by the layers of flow blocking members 26, the pure water and the sodium hydroxide are preliminarily mixed (the main function of these flow blocking members 26 is to slow down the flow rate of the material, increase the contact time and area between the materials, and thus promote the preliminary mixing of the sodium hydroxide and the pure water), and then enter the electrolyte storage tank 15. The steam output from the heat medium output pipe 41 is introduced into the jacket 29 through the pipeline, and the fusion speed is promoted by heating. The ultrasonic transducer 38 is activated, and the high-frequency vibration waves generated can further break the tiny particles and bubbles in the electrolyte, increase the contact area and mixing uniformity between the sodium hydroxide and the pure water.

[0040] After the electrolyte concentration sensor (not shown) in the electrolyte storage tank 15 detects that the concentration reaches the standard, the material distributor 6 stops feeding. After the temperature sensor (not shown) in the electrolyte storage tank 15 detects that the temperature reaches the standard, the steam supply is stopped. Under the control of the control module, the electrolyte in the electrolyte storage tank 15 is pumped to the electrolyte input main pipe 54 along the electrolyte delivery pipe 17, and then distributed to each pole chamber by the pipeline. During the transportation process, the concentration sensor 2 16 detects the concentration of the electrolyte in real time. If the concentration detected by the concentration sensor 2 16 does not meet the preset value, it means that the result of the electrolyte concentration sensor is deviated (usually caused by uneven mixing, with a step concentration difference). Under the control of the distribution valve 6 19, the electrolyte is discharged to the designated position or refluxed to the electrolyte storage tank 15 along the alkali solution discharge pipe 1. If the difference between the two sensors is still large after a period of time (usually 5-10 minutes), the electrolyte concentration is adjusted by increasing the amount of pure water or the amount of sodium hydroxide until the difference between the two sensors meets the fluctuation range. Since concentration adjustment takes time, in order to improve efficiency, the electrolyte storage tank 15 on standby on the left takes over the work.

[0041] The electrolyte in the electrolytic cell 1 is collected from the overflow port 45 to the electrolyte output main pipe 49, and then flows back to the electrolyte storage tank 15 through the electrolyte output pipe 3. In this way, the electrolyte circulates between the electrolytic cell 1 and the electrolyte storage tank 15, speeding up the material transfer rate between the electrode surface and the electrolyte, so that the reactants reach the electrode surface in time and the products leave the electrode surface in time, thereby maintaining the high activity of the electrode surface and improving the electrolysis efficiency. The circulation of the electrolyte can also reduce the concentration polarization phenomenon caused by the concentration gradient in the electrolytic cell 1, making the electrolysis reaction more sufficient and uniform. The circulation of the electrolyte can also take away the heat generated during electrolysis, which helps to reduce the temperature in the electrolytic cell 1 and reduce the safety hazards caused by high temperature.

[0042] The concentration sensor 1 2 is used to detect the concentration of the electrolyte flowing out of the electrolytic cell 1, and the concentration sensor 2 16 (or the concentration sensor 3 18) is used to detect the concentration of the electrolyte entering the electrolytic cell 1. If the concentration sensor 1 2 detects that the concentration is increased, it means that the water in the electrolyte is consumed. When the concentration sensor 1 2 detects that the concentration is higher than the set value, an appropriate amount of pure water is added to the electrolyte storage tank 15 through the pure water delivery pipe 8 to restore the original concentration of the electrolyte.

[0043] If by-products are needed, the material distributor 6 adds sodium hydroxide to the electrolyte storage tank 15. As the water content in the electrolyte continues to be consumed, the concentration of the electrolyte becomes higher and higher. Then the currently working electrolyte storage tank 15 stops working, and another standby electrolyte storage tank 15 takes over to deliver electrolyte of normal concentration into the electrolytic cell 1. The electrolyte in the previous electrolyte storage tank 15 can be sold as liquid alkali or further utilized.

[0044] According to the embodiments of the present invention as described above, these embodiments do not describe all the details in detail, nor do they limit the invention to specific embodiments. Obviously, many modifications and changes can be made based on the above description. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can make good use of the present invention and the modified use based on the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water electrolysis hydrogen production device, comprising at least one hydrogen production module, characterized in that: Each of the hydrogen production modules is equipped with at least one electrolyzer (1), and each of the electrolyzers (1) is equipped with two electrolyte storage tanks (15); the electrolyzer (1) is provided with a hydrogen delivery main pipe (46), an oxygen delivery main pipe (47), an electrolyte output main pipe (49), and an electrolyte input main pipe (54); the water inlet (42) of the electrolyte storage tank (15) is connected to a premixer (13); the electrolyte output main pipe (49) is connected to an electrolyte output pipe (3), and the electrolyte output pipe (3) is provided with a concentration sensor (2) and a distribution valve (4) in sequence along the delivery path; the distribution valve (4) is connected to the two electrolyte storage tanks (15) through two pipelines. 5) of the return port (43); the water outlet (37) of one of the electrolyte storage tanks (15) is connected to the electrolyte input main pipe (54) through the electrolyte delivery pipe (17); the electrolyte delivery pipe (17) is provided with a concentration sensor (16), a distribution valve (19) and a distribution valve (21) in sequence along the delivery path; the distribution valve (19) is connected to the alkali solution discharge pipe (1); the water outlet (37) of the other electrolyte storage tank (15) is connected to the distribution valve (21) through the electrolyte delivery pipe (20); the distribution valve (21) is connected to the alkali solution discharge pipe (2); and the electrolyte delivery pipe (20) is provided with a concentration sensor (18).

2. The water electrolysis hydrogen production device according to claim 1, characterized in that: The premixer (13) comprises an upper cavity (22) and a lower cavity (25) which are mounted in a snap-fitting manner; a liquid outlet (27) connected to a water inlet (42) is provided at the bottom of the lower cavity (25); a plurality of groups of vertically arranged flow-blocking members (26) are fixed in the inner cavity of the lower cavity (25); a jacket (29) is provided on the outer wall of the lower cavity (25); a heat medium outlet (30) and a heat medium inlet (28) are provided on one side of the jacket (29); a solid material inlet (23) facing the flow-blocking member (26) is provided in the middle of the top of the upper cavity (22); and a liquid inlet (24) communicating with the solid material inlet (23) is provided on one side of the upper cavity (22).

3. The water electrolysis hydrogen production device according to claim 2, characterized in that: The flow blocking member (26) comprises an upper circular plate (31) and a lower circular plate (33) with a central hole, the diameter of the lower circular plate (33) being consistent with the cavity diameter of the lower cavity (25), the aperture of the central hole being smaller than the diameter of the upper circular plate (31), the upper circular plate (31) and the lower circular plate (33) being both provided with circumferentially distributed water leakage holes (35), the upper circular plate (31) being mounted on the upper surface of the lower circular plate (33) via a plurality of groups of support columns (32), and an annular closed water retaining weir (34) being provided on the outer edge of the upper circular plate (31) and the edge of the central hole of the lower circular plate (33).

4. The water electrolysis hydrogen production device according to claim 2, characterized in that: The hydrogen production module further comprises a material distributor (6) and a pure water delivery pipe (8), wherein the pure water delivery pipe (8) is provided with a distribution valve three (9), wherein the distribution valve three (9) is respectively connected to the liquid inlets (24) of the two premixers (13) through pipelines, and the discharge end of the material distributor (6) is respectively connected to the solid material inlets (23) of the two premixers (13) through pipelines.

5. The water electrolysis hydrogen production device according to claim 2, characterized in that: The hydrogen production module further comprises a steam input pipe (10) and a steam output pipe (12), wherein the steam input pipe (10) is provided with a second distribution valve (5), and the steam output pipe (12) is provided with a fourth distribution valve (11). A partition (40) is provided inside the electrolyte storage tank (15), and a heating coil (39) is provided below the partition (40). A heat medium input pipe (36) and a heat medium output pipe (41) are respectively provided at both ends of the heating coil (39) and extend through the partition (40) to the outside of the electrolyte storage tank (15). The heat medium input pipes (36) of the two electrolyte storage tanks (15) are connected to the second distribution valve (5) through a pipeline, and the heat medium output pipes (41) of the two electrolyte storage tanks (15) are connected to the fourth distribution valve (11) through a steam pipeline.

6. The water electrolysis hydrogen production device according to claim 5, characterized in that: Two groups of distribution valves five (14) are provided on the steam pipeline, one of the distribution valves five (14) is connected to the heat medium inlet (28) through a pipeline, and the other distribution valve five (14) is connected to the heat medium outlet (30) through a pipeline.

7. The water electrolysis hydrogen production device according to claim 5, characterized in that: A plurality of ultrasonic transducers (38) are arranged on the partition (40).

8. The water electrolysis hydrogen production device according to claim 1, characterized in that: End plates (55) are provided at both ends of the outside of the electrolytic cell (1), and an anode plate (44) and a cathode plate (51) are provided at both ends of the inside of the electrolytic cell (1), respectively. An anode chamber is formed between the anode plate (44) and the end plate (55) on the same side, and a cathode chamber is formed between the cathode plate (51) and the end plate (55) on the same side. The chamber between the anode plate (44) and the cathode plate (51) is divided into a plurality of independent bipolar chambers by a plurality of groups of bipolar plates (52), and a diaphragm (53) is provided in the middle of each bipolar chamber. The anode chamber, the cathode chamber, and one side of the bipolar chamber are provided with An overflow port (45) is connected to an electrolyte output main pipe (49) through a pipeline. The bottoms of the anode chamber, cathode chamber and bipolar chamber are each provided with a liquid inlet, which is connected to an electrolyte input main pipe (54) through a pipeline. The top of the anode chamber and one side of the top of the bipolar chamber are each provided with an oxygen outlet, which is connected to an oxygen delivery main pipe (47) through an oxygen pipe (50). The top of the cathode chamber and the other side of the top of the bipolar chamber are each provided with a hydrogen outlet, which is connected to a hydrogen delivery main pipe (46) through a hydrogen pipe (48).

9. The water electrolysis hydrogen production device according to claim 1, characterized in that: A hydrogen concentration sensor is provided at the end of the hydrogen delivery main pipe (46), and an oxygen concentration sensor is provided at the end of the oxygen delivery main pipe (47).

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