Hydrogen production equipment

Abstract

The utility model discloses hydrogen production equipment, and relates to the technical field of hydrogen production, and the hydrogen production equipment comprises an electrolytic bath, a gas-liquid separator and a gas-liquid mixer; the electrolytic cell has a backflow end and an outlet end; the gas-liquid separator is provided with an inlet and a liquid outlet, and the inlet is communicated with the outlet end; two ends of the gas-liquid mixer are respectively communicated with the liquid outlet and the backflow end. According to the technical scheme, the operation stability of the electrolytic cell can be improved.

Description

Technical Field

[0001] This application relates to the technical field of hydrogen production, and particularly to a hydrogen production device. Background Art

[0002] In the electrolytic hydrogen production process, the electrolyte separated by the gas-liquid separator returns to the electrolytic cell. However, since the electrolyte separated by the gas-liquid separator still contains broken bubbles, before entering the electrolytic cell, due to the long pipeline, the gas in the electrolyte will coalesce, forming a stratified gas-liquid mixture. When the gas-liquid mixture enters the flow channel inside the electrolytic cell, the electrolyte is affected by the gas resistance of the bubbles, and its distribution in each small chamber of the electrolytic cell is uneven, resulting in high energy consumption and low efficiency of the electrolytic cell, and even serious local overheating, which is not conducive to the long-term safe and stable operation of the electrolytic cell. Summary of the Utility Model

[0003] The main purpose of this application is to propose a hydrogen production device, aiming to improve the operation stability of the electrolytic cell.

[0004] To achieve the above object, the hydrogen production device proposed in this application includes an electrolytic cell, a gas-liquid separator, and a gas-liquid mixer; the electrolytic cell has a reflux end and an outlet end; the gas-liquid separator has an inlet and a liquid outlet, and the inlet is communicated with the outlet end; both ends of the gas-liquid mixer are respectively communicated with the liquid outlet and the reflux end.

[0005] In one embodiment, the hydrogen production device further includes a first control valve, and the first control valve is arranged in parallel with the gas-liquid mixer.

[0006] In one embodiment, the hydrogen production device further includes a second control valve, and the second control valve is arranged in series with the gas-liquid mixer.

[0007] In one embodiment, there are two second control valves, and the two second control valves are respectively arranged on the inlet side and the outlet side of the gas-liquid mixer.

[0008] In one embodiment, there are at least two gas-liquid mixers, and at least two gas-liquid mixers are arranged in series.

[0009] In one embodiment, the hydrogen production device further includes a circulation pump, the circulation pump is connected between the liquid outlet and the reflux end, and the gas-liquid mixer is arranged on the side of the circulation pump away from the liquid outlet.

[0010] In one embodiment, the hydrogen production device further includes a heat exchanger, the heat exchanger is connected between the liquid outlet and the reflux end, and the gas-liquid mixer is arranged on the side of the heat exchanger away from the liquid outlet.

[0011] In one embodiment, the hydrogen production device further includes a heat exchanger and a circulation pump. The heat exchanger and the circulation pump are sequentially connected between the liquid outlet and the reflux end, and the gas-liquid mixer is arranged on the side of the circulation pump away from the liquid outlet.

[0012] In one embodiment, there are at least two gas-liquid separators and one gas-liquid mixer. The liquid outlets of at least two gas-liquid separators are all connected to the gas-liquid mixer.

[0013] In one embodiment, the reflux end includes an anode reflux port and a cathode reflux port. The gas-liquid separator includes a hydrogen separator and an oxygen separator. There are at least two gas-liquid mixers. At least one gas-liquid mixer is connected to the hydrogen separator and the cathode reflux port at both ends respectively, and at least one gas-liquid mixer is connected to the oxygen separator and the anode reflux port at both ends respectively.

[0014] The technical solution of the present application enables the mixture of gas and electrolyte generated at the outlet end of the electrolytic cell to enter the gas-liquid separator for gas-liquid separation by connecting the inlet of the gas-liquid separator to the outlet end of the electrolytic cell, so that the separated electrolyte can flow out from the liquid outlet of the gas-liquid separator. By connecting the two ends of the gas-liquid mixer to the liquid outlet of the gas-liquid separator and the reflux end of the electrolytic cell respectively, on the one hand, the electrolyte flowing out from the liquid outlet can be refluxed into the electrolytic cell, and on the other hand, the gas and liquid in the electrolyte can be fully mixed before the electrolyte refluxes into the electrolytic cell to form a stable phase state, thereby reducing the phenomenon of gas-liquid stratification when the electrolyte refluxes into the electrolytic cell, further reducing the risk of uneven distribution of the electrolyte in each small chamber due to the gas resistance of the bubbles, reducing the energy consumption of the electrolytic cell, improving the efficiency of the electrolytic cell, and reducing the risk of local severe overheating, thus being beneficial to improving the operation stability of the electrolytic cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the hydrogen production device provided by the present application;

[0017] Figure 2 It is a schematic structural diagram of another embodiment of the hydrogen production device provided by the present application;

[0018] Figure 3Schematic structural diagram of another embodiment of the hydrogen production device provided by the present application;

[0019] Figure 4 Schematic structural diagram of yet another embodiment of the hydrogen production device provided by the present application;

[0020] Figure 5 Schematic structural diagram of still another embodiment of the hydrogen production device provided by the present application.

[0021] Explanation of the reference numerals in the drawings:

[0022] 100, electrolytic cell; 110, reflux end; 111, anode reflux port; 112, cathode reflux port; 120, outlet end;

[0023] 200, gas-liquid separator; 210, inlet; 220, liquid outlet; 201, hydrogen separator; 202, oxygen separator;

[0024] 300, gas-liquid mixer;

[0025] 400, circulation pump;

[0026] 500, heat exchanger;

[0027] 600, first control valve;

[0028] 700, second control valve.

[0029] The realization of the purpose, functional features and advantages of the present application will be further described in conjunction with the embodiments with reference to the drawings. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0031] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0032] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0033] In the electrolytic hydrogen production process, the electrolyte separated by the gas-liquid separator returns to the electrolytic cell. However, since the electrolyte separated by the gas-liquid separator still contains broken bubbles, before entering the electrolytic cell, due to the long pipeline, the gas in the electrolyte will coalesce, forming a stratified gas-liquid mixture. When the gas-liquid mixture enters the internal flow channel of the electrolytic cell, the electrolyte is affected by the gas resistance of the bubbles, and its distribution in each small chamber of the electrolytic cell is uneven, resulting in high energy consumption and low efficiency of the electrolytic cell, and even serious local overheating, which is not conducive to the long-term safe and stable operation of the electrolytic cell.

[0034] In order to improve the operating stability of the electrolytic cell, the present application proposes a hydrogen production device.

[0035] Please refer to Figure 1 and Figure 2 , in an embodiment of the present application, the hydrogen production device includes an electrolytic cell 100, a gas-liquid separator 200, and a gas-liquid mixer 300; the electrolytic cell 100 has a reflux end 110 and an outlet end 120; the gas-liquid separator 200 has an inlet 210 and a liquid outlet 220, and the inlet 210 is connected to the outlet end 120; both ends of the gas-liquid mixer 300 are respectively connected to the liquid outlet 220 and the reflux end 110.

[0036] To ensure the recycling of the electrolyte, the electrolytic cell 100 has a reflux end 110 for the electrolyte to flow back. After the electrolyte enters the electrolytic cell 100 from the reflux end 110, anode gas and cathode gas will be generated under the action of electrolysis. The outlet end 120 of the electrolytic cell 100 usually includes an anode outlet and a cathode outlet, so that a mixture of anode gas and electrolyte flows out from the anode outlet of the electrolytic cell 100 and a mixture of cathode gas and electrolyte flows out from the cathode outlet. In the hydrogen production device, the anode gas is oxygen and the cathode gas is hydrogen. Since the gas flowing out from the outlet end 120 of the electrolytic cell 100 will inevitably carry some electrolyte, in order to obtain purer gas, the hydrogen production device further includes a gas-liquid separator 200. By setting the gas-liquid separator 200, the inlet 210 of the gas-liquid separator 200 is connected to the outlet end 120 of the electrolytic cell 100, and the gas-liquid mixture flowing out from the outlet end 120 of the electrolytic cell 100 enters the gas-liquid separator 200 for gas-liquid separation. It can be understood that, in order to facilitate the outflow of the separated gas and liquid, the gas-liquid separator 200 has a gas outlet and a liquid outlet 220. Among them, the gas outlet can be set higher than the liquid outlet 220, so as to further facilitate the separation of gas and liquid according to the properties of gas and liquid. The electrolyte flowing out from the liquid outlet 220 can be connected to the reflux end 110 of the electrolytic cell 100 and refluxed into the electrolytic cell 100 to realize the recycling of the electrolyte and reduce the phenomenon of electrolyte waste. However, inevitably, part of the gas is also mixed in the liquid flowing out from the liquid outlet 220. The technical solution of the present application passes through the gas-liquid mixer 300, and both ends of the gas-liquid mixer 300 are respectively connected to the liquid outlet 220 and the reflux end 110, so that the gas-liquid mixture flowing out from the liquid outlet 220 will first pass through the sufficient mixing action of the gas-liquid mixer 300 before entering the electrolytic cell 100, thereby reducing the risk of gas-liquid stratification of the gas-liquid mixture entering the electrolytic cell 100, and further reducing the risk that the electrolyte is affected by the gas resistance of the bubbles and is unevenly distributed in each small chamber, thereby reducing the energy consumption of the electrolytic cell 100, improving the efficiency of the electrolytic cell 100, reducing the risk of local severe overheating, and being beneficial to improving the operation stability of the electrolytic cell 100.

[0037] It should be noted that when both ends of the gas-liquid mixer 300 are respectively connected to the liquid outlet 220 and the reflux end 110, they can be directly connected or indirectly connected, as long as the mixture flowing out from the liquid outlet 220 can first pass through the sufficient mixing of the gas-liquid mixer 300 and then enter the reflux end 110 of the electrolytic cell 100.

[0038] The technical solution of the present application connects the inlet 210 of the gas-liquid separator 200 to the outlet end 120 of the electrolytic cell 100, so that the mixture of gas and electrolyte generated at the outlet end 120 of the electrolytic cell 100 can enter the gas-liquid separator 200 for gas-liquid separation, and thus the separated electrolyte can flow out from the liquid outlet 220 of the gas-liquid separator 200. By connecting the two ends of the gas-liquid mixer 300 to the liquid outlet 220 of the gas-liquid separator 200 and the reflux end 110 of the electrolytic cell 100 respectively, on the one hand, the electrolyte flowing out from the liquid outlet 220 can be refluxed into the electrolytic cell 100, and on the other hand, the gas and liquid in the electrolyte can be fully mixed before the electrolyte refluxes into the electrolytic cell 100 to form a stable phase state, thereby reducing the phenomenon of gas-liquid stratification when the electrolyte refluxes into the electrolytic cell 100, further reducing the risk of uneven distribution of the electrolyte in each small chamber due to the gas resistance of bubbles, reducing the energy consumption of the electrolytic cell 100, improving the efficiency of the electrolytic cell 100, and reducing the risk of local severe overheating, thus being beneficial to improving the operation stability of the electrolytic cell 100.

[0039] Please refer to Figure 1 , in the embodiment of the present application, the gas-liquid mixer 300 can be arranged as close as possible to the reflux end 110. In this way, it can ensure that the gas and liquid in the electrolyte entering the reflux end 110 are fully mixed, so as to further ensure that the electrolyte is more evenly distributed in each small chamber, ensure that the energy consumption of the electrolytic cell 100 is reduced, the efficiency of the electrolytic cell 100 is improved, and the risk of local severe overheating is avoided, thus being more beneficial to improving the operation stability of the electrolytic cell 100.

[0040] Please refer to Figure 1 , in the embodiment of the present application, the hydrogen production device further includes a circulation pump 400. The circulation pump 400 is connected between the liquid outlet 220 and the reflux end 110, and the gas-liquid mixer 300 is arranged on the side of the circulation pump 400 away from the liquid outlet 220.

[0041] By setting the circulation pump 400, the driving force for the electrolyte to flow from the liquid outlet 220 to the reflux end 110 can be provided. By arranging the gas-liquid mixer 300 on the side of the circulation pump 400 away from the liquid outlet 220, the gas-liquid mixer 300 is closer to the reflux end 110, so as to ensure that the gas and liquid in the electrolyte entering the reflux end 110 are fully mixed.

[0042] Please refer to Figure 1 , in the embodiment of the present application, the hydrogen production device further includes a heat exchanger 500. The heat exchanger 500 is connected between the liquid outlet 220 and the reflux end 110, and the gas-liquid mixer 300 is arranged on the side of the heat exchanger 500 away from the liquid outlet 220.

[0043] It can be understood that the temperature of the electrolyte flowing out from the liquid outlet 220 of the gas-liquid separator 200 is usually relatively high. By arranging a heat exchanger 500 between the liquid outlet 220 and the reflux end 110, the electrolyte can have a suitable temperature when flowing back into the electrolytic cell 100. Specifically, the heat exchanger 500 has two independent flow channels. One end of one flow channel is respectively connected to the liquid outlet 220 and the reflux end 110, so that this flow channel can supply the electrolyte to pass through; a coolant can be introduced into the other flow channel, and then the coolant exchanges heat with the electrolyte to achieve the effect of cooling the electrolyte.

[0044] By arranging the gas-liquid mixer 300 on the side of the heat exchanger 500 away from the liquid outlet 220, the gas-liquid mixer 300 can be closer to the reflux end 110 of the electrolytic cell 100, so as to ensure that the gas and liquid in the electrolyte entering the reflux end 110 can be fully mixed.

[0045] Please refer to Figure 1 , the hydrogen production device can also include the above-mentioned heat exchanger 500 and circulation pump 400. Specifically, in the embodiment of the present application, the heat exchanger 500 and the circulation pump 400 are sequentially connected between the liquid outlet 220 and the reflux end 110, and the gas-liquid mixer 300 is arranged on the side of the circulation pump 400 away from the liquid outlet 220.

[0046] With such an arrangement, the heat exchanger 500 is arranged on the side of the circulation pump 400 close to the liquid outlet 220. By arranging the gas-liquid mixer 300 on the side of the circulation pump 400 away from the liquid outlet 220, the gas-liquid mixer 300 is arranged closer to the reflux end 110 to ensure that the gas and liquid in the electrolyte entering the reflux end 110 can be fully mixed.

[0047] Alternatively, in another embodiment, the heat exchanger 500 can also be arranged on the side of the circulation pump 400 close to the reflux end 110, and the gas-liquid mixer 300 is arranged on the side of the heat exchanger 500 away from the port of the circulation pump 400. With such an arrangement, the gas-liquid mixer 300 is also arranged closer to the reflux end 110 to ensure that the gas and liquid in the electrolyte entering the reflux end 110 can be fully mixed.

[0048] Please refer to Figure 3 and Figure 4 , in the embodiment of the present application, the hydrogen production device further includes a first control valve 600, and the first control valve 600 is arranged in parallel with the gas-liquid mixer 300.

[0049] By arranging the first control valve 600 in parallel with the gas-liquid mixer 300, when the first control valve 600 is opened, at least part of the electrolyte can pass through the first control valve 600 and directly enter the electrolytic cell 100, thereby improving the efficiency of the electrolyte entering the electrolytic cell 100. It can be understood that when the first control valve 600 is closed, all the electrolyte can pass through the sufficient mixing effect of the gas-liquid mixer 300 to reduce the risk of being affected by the gas resistance of the bubbles, ensure that the electrolyte enters each small chamber of the electrolytic cell 100 more evenly, and improve the operating stability of the electrolytic cell 100.

[0050] Please refer to Figure 3 , in the embodiment of the present application, the hydrogen production device further includes a second control valve 700, and the second control valve 700 is arranged in series with the gas-liquid mixer 300.

[0051] By arranging the second control valve 700 in series with the gas-liquid mixer 300, the second control valve 700 can control whether the electrolyte passes through the mixing effect of the gas-liquid mixer 300 and enters the electrolytic cell 100. When the second control valve 700 is opened, at least part of the electrolyte can pass through the gas-liquid mixer 300, and then the gas and liquid in at least part of the electrolyte are fully mixed, reducing the risk of being affected by the gas resistance of the bubbles, ensuring that the electrolyte enters each small chamber of the electrolytic cell 100 more evenly, and improving the operating stability of the electrolytic cell 100. When the second control valve 700 is closed, the first control valve 600 can be correspondingly opened, so that all the electrolyte passes through the first control valve 600 and directly enters the electrolytic cell 100, thereby improving the efficiency of the electrolyte flowing back to the electrolytic cell 100.

[0052] Furthermore, a flow meter can be provided at the outlet of the circulation pump 400, and the flow meter is used to measure the flow rate of the electrolyte. Since the greater the flow rate of the electrolyte flowing into the electrolytic cell 100, the more uniform the flow field distribution of the electrolyte inside the electrolytic cell 100, when the flow rate of the electrolyte that needs to flow back measured by the flow meter is lower than a predetermined value, the second control valve 700 can be controlled to open, and the first control valve 600 can be controlled to close, so as to ensure that the gas and liquid in the electrolyte with a small flow rate can be pre-mixed sufficiently under the action of the gas-liquid mixer 300 before entering the electrolytic cell 100, which is beneficial to the more uniform flow field distribution inside the electrolytic cell 100, that is, the distribution in each small chamber is more uniform. When the flow rate of the electrolyte that needs to flow back measured by the flow meter is higher than the predetermined value, the first control valve 600 can be controlled to open, and the second control valve 700 can be controlled to close. At this time, there is no need to enter the gas-liquid mixer 300, but directly flow back into the electrolytic cell 100, thereby improving the electrolysis efficiency.

[0053] Please refer to Figure 3, in an embodiment of the present application, there are two second control valves 700, and the two second control valves 700 are respectively arranged on the inlet 210 side and the outlet side of the gas-liquid mixer 300.

[0054] With such an arrangement, it is convenient to repair and replace the gas-liquid mixer 300. In addition, with such an arrangement, the control accuracy of whether the electrolyte enters the gas-liquid mixer 300 can also be improved.

[0055] Please refer to Figure 1 and Figure 3 , in an embodiment of the present application, there are at least two gas-liquid separators 200 and one gas-liquid mixer 300, and the liquid outlets 220 of the at least two gas-liquid separators 200 are all communicated with the gas-liquid mixer 300.

[0056] It can be understood that in a hydrogen production system, an anode gas oxygen and a cathode gas hydrogen are generated at the outlet end 120 of the electrolytic cell 100. In order to reduce the risk of safety hazards caused by the mixing of oxygen and hydrogen, the hydrogen and oxygen are usually processed subsequently separately. Since both the hydrogen and oxygen discharged from the outlet end 120 of the electrolytic cell 100 are mixed with the electrolyte, by providing at least two gas-liquid separators 200, the mixture of hydrogen and the electrolyte and the mixture of oxygen and the electrolyte can be respectively introduced into the at least two gas-liquid separators 200 for independent gas-liquid separation. Of course, in other examples, only hydrogen can also be introduced into the gas-liquid separator 200. When there are at least two gas-liquid separators 200, a part of the mixture of hydrogen and the electrolyte can be introduced into one of the gas-liquid separators 200, and the other part can be introduced into another one of the gas-liquid separators 200.

[0057] In order to enable the electrolyte in the at least two gas-liquid separators 200 to flow back into the electrolytic cell 100 for reuse, the liquid outlets 220 of the at least two gas-liquid separators 200 are all communicated with the reflux end 110 of the electrolytic cell 100. By communicating the liquid outlets 220 of the at least two gas-liquid separators 200 with the gas-liquid mixer 300, the electrolyte flowing out of the at least two gas-liquid separators 200 can all pass through the gas-liquid mixer 300 for gas-liquid mixing to form a stable phase state, ensuring that the electrolyte is more evenly distributed when entering the electrolytic cell 100 and improving the operation stability of the electrolytic cell 100. In addition, since the liquid outlets 220 of the at least two gas-liquid separators 200 are all communicated with the gas-liquid mixer 300, the gas-liquid mixer 300 can be simultaneously communicated with the two gas-liquid separators 200, thus saving the number of gas-liquid mixers 300 and reducing the cost of the hydrogen production equipment.

[0058] Please refer to Figure 2 and Figure 4, in another embodiment of the present application, the reflux end 110 includes an anode reflux port 111 and a cathode reflux port 112, the gas-liquid separator 200 includes a hydrogen separator 201 and an oxygen separator 202, at least two gas-liquid mixers 300 are provided, and both ends of at least one gas-liquid mixer 300 are respectively communicated with the hydrogen separator 201 and the cathode reflux port 112, and both ends of at least one gas-liquid mixer 300 are respectively communicated with the oxygen separator 202 and the anode reflux port 111.

[0059] With such a setting, the hydrogen discharged from the electrolytic cell 100 and the electrolyte mixed in the hydrogen enter the hydrogen separator 201 for gas-liquid separation. The separated electrolyte forms a stable phase through one of the gas-liquid mixers 300 and then enters the cathode reflux port 112, and thus enters the cathode chamber to avoid affecting the anode chamber. In addition, it can also avoid mixing with oxygen and causing a safety accident. In addition, with such a setting, the oxygen discharged from the electrolytic cell 100 and the electrolyte mixed in the oxygen enter the oxygen separator 202 for gas-liquid separation. The separated electrolyte forms a stable phase through the other gas-liquid mixer 300 and then enters the anode reflux port 111, and thus enters the anode chamber to avoid affecting the cathode chamber. In addition, it can also avoid mixing with hydrogen and causing a safety accident.

[0060] Please refer to Figure 5 As shown, in an embodiment of the present application, at least two gas-liquid mixers 300 are provided, and at least two gas-liquid mixers 300 are arranged in series.

[0061] By providing at least two gas-liquid mixers 300 and arranging at least two gas-liquid mixers 300 in series, the mixture of electrolyte and gas flowing out from the liquid outlet 220 can be gas-liquid mixed at least twice before flowing back into the electrolytic cell 100, thereby further improving the uniformity of gas-liquid mixing, further reducing the risk of gas-liquid stratification when the mixture of electrolyte and gas flows back into the electrolytic cell 100, thereby further reducing the energy consumption of the electrolytic cell 100, further improving the efficiency of the electrolytic cell 100, reducing the risk of local severe overheating, and being more conducive to improving the operating stability of the electrolytic cell 100.

[0062] The above are only exemplary embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made under the technical concept of the present application by using the content of the specification and drawings of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A hydrogen production device, characterized in that, Comprising: An electrolytic cell having a reflux end and an outlet end; A gas-liquid separator having an inlet and a liquid outlet, the inlet being connected to the outlet end; And A gas-liquid mixer, with both ends of the gas-liquid mixer being respectively connected to the liquid outlet and the reflux end.

2. The hydrogen production device according to claim 1, characterized in that, The hydrogen production device further includes a first control valve, and the first control valve is arranged in parallel with the gas-liquid mixer.

3. The hydrogen production device according to claim 2, characterized in that, The hydrogen production device further includes a second control valve, and the second control valve is arranged in series with the gas-liquid mixer.

4. The hydrogen production device according to claim 3, characterized in that, There are two second control valves, and the two second control valves are respectively arranged on the inlet side and the outlet side of the gas-liquid mixer.

5. The hydrogen production device according to claim 1, characterized in that, There are at least two gas-liquid mixers, and at least two gas-liquid mixers are arranged in series.

6. The hydrogen production device according to claim 1, characterized in that The hydrogen production device further includes a circulation pump, the circulation pump is connected between the liquid outlet and the reflux end, and the gas-liquid mixer is arranged on the side of the circulation pump away from the liquid outlet.

7. The hydrogen production device according to claim 1, wherein The hydrogen production device further includes a heat exchanger, the heat exchanger is connected between the liquid outlet and the reflux end, and the gas-liquid mixer is arranged on the side of the heat exchanger away from the liquid outlet.

8. The hydrogen production device according to claim 1, characterized in that, The hydrogen production device further includes a heat exchanger and a circulation pump, the heat exchanger and the circulation pump are sequentially connected between the liquid outlet and the reflux end, and the gas-liquid mixer is arranged on the side of the circulation pump away from the liquid outlet.

9. The hydrogen production device according to any one of claims 1 to 8, characterized in that, There are at least two gas-liquid separators, there is one gas-liquid mixer, and the liquid outlets of at least two gas-liquid separators are all connected to the gas-liquid mixer.

10. The hydrogen production device according to any one of claims 1 to 8, characterized in that, The reflux end includes an anode reflux port and a cathode reflux port, the gas-liquid separator includes a hydrogen separator and an oxygen separator, there are at least two gas-liquid mixers, and at least one gas-liquid mixer has both ends respectively connected to the hydrogen separator and the cathode reflux port, and at least one gas-liquid mixer has both ends respectively connected to the oxygen separator and the anode reflux port.

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