Water electrolysis hydrogen production device suitable for renewable energy source volatility

Abstract

The utility model provides a water electrolysis hydrogen production device suitable for renewable energy source volatility. The water electrolysis hydrogen production device comprises renewable energy source power supply and distribution equipment, an electrolytic cell, a first gas phase header pipe used for collecting an anode gas phase of the electrolytic cell, a second gas phase header pipe used for collecting a cathode gas phase of the electrolytic cell and a controller, the electrolytic cell and the controller are electrically connected with the renewable energy power supply and distribution equipment, a first regulating valve and a second regulating valve are arranged on the first gas-phase header pipe in parallel, a third regulating valve and a fourth regulating valve are arranged on the second gas-phase header pipe in parallel, and the caliber of the first regulating valve is larger than that of the second regulating valve; the caliber of the third adjusting valve is larger than that of the fourth adjusting valve, and the first adjusting valve, the second adjusting valve, the third adjusting valve and the fourth adjusting valve are all electrically connected with the controller. And a structural basis is provided for adapting to the volatility of renewable energy power generation and adjusting the oxygen pressure, the hydrogen pressure and the pressure difference in the device.

Description

Technical Field

[0001] This utility model relates to the field of water electrolysis for hydrogen production technology, and in particular to a water electrolysis device suitable for the fluctuations of renewable energy. Background Technology

[0002] To achieve a cleaner and lower-carbon hydrogen energy industry throughout its entire lifecycle, renewable energy hydrogen production technology has been proposed. This technology utilizes renewable energy sources (such as solar and wind power) to generate electricity, which then powers the water electrolysis hydrogen production unit, thereby achieving green and efficient hydrogen production.

[0003] However, compared with thermal and nuclear power generation resources, renewable power generation resources (such as wind power and photovoltaic power) are affected by natural climate and have a certain degree of volatility. Therefore, using renewable energy to generate electricity for water electrolysis hydrogen production devices will cause oscillations and fluctuations in oxygen pressure, hydrogen pressure and pressure difference in water electrolysis hydrogen production devices, thereby affecting the overall stability of water electrolysis hydrogen production devices and reducing hydrogen production efficiency and quality.

[0004] Therefore, there is an urgent need for a water electrolysis hydrogen production device that is suitable for the volatility of renewable energy. Utility Model Content

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides an electrolytic water hydrogen production device suitable for the fluctuation of renewable energy, which provides a structural basis for adjusting the oxygen pressure, hydrogen pressure and pressure difference in the device to adapt to the fluctuation of renewable energy power generation.

[0006] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0007] This utility model provides a hydrogen production device for water electrolysis suitable for the fluctuation of renewable energy, including renewable energy power supply and distribution equipment, an electrolyzer, a first gas phase main pipe for collecting the anode gas phase of the electrolyzer, a second gas phase main pipe for collecting the cathode gas phase of the electrolyzer, and a controller; the electrolyzer and the controller are both electrically connected to the renewable energy power supply and distribution equipment. A first regulating valve and a second regulating valve are arranged in parallel on the first gas phase main pipe, and a third regulating valve and a fourth regulating valve are arranged in parallel on the second gas phase main pipe. The diameter of the first regulating valve is larger than the diameter of the second regulating valve, and the diameter of the third regulating valve is larger than the diameter of the fourth regulating valve. The first regulating valve, the second regulating valve, the third regulating valve and the fourth regulating valve are all electrically connected to the controller.

[0008] Optionally, the diameter of the second regulating valve is 20% to 80% of the diameter of the first regulating valve, and the diameter of the fourth regulating valve is 20% to 80% of the diameter of the third regulating valve.

[0009] Optionally, the water electrolysis hydrogen production device suitable for renewable energy fluctuations further includes an anode gas-liquid separator, a cathode gas-liquid separator, an anode liquid circulation tank, and a cathode liquid circulation tank; the anode chamber outlet of the electrolyzer is connected to the inlet of the anode gas-liquid separator, the gas phase outlet of the anode gas-liquid separator is connected to the first gas phase main pipe, the liquid phase outlet of the anode gas-liquid separator is connected to the liquid phase inlet of the anode liquid circulation tank, the gas phase outlet of the anode liquid circulation tank is connected to the first gas phase main pipe, the cathode chamber outlet of the electrolyzer is connected to the inlet of the cathode gas-liquid separator, the gas phase outlet of the cathode gas-liquid separator is connected to the second gas phase main pipe, the liquid phase outlet of the cathode gas-liquid separator is connected to the liquid phase inlet of the cathode liquid circulation tank, the gas phase outlet of the cathode liquid circulation tank is connected to the second gas phase main pipe, the liquid phase outlet located at the bottom of the anode liquid circulation tank is connected to the liquid phase outlet located at the bottom of the cathode liquid circulation tank through at least one connecting pipe, and the anode chamber inlet and the cathode chamber inlet of the electrolyzer are respectively connected to the connecting pipe.

[0010] Optionally, a first level gauge is installed in the anolyte circulation tank, and a second level gauge is installed in the catholyte circulation tank. Both the first and second level gauges are electrically connected to the controller.

[0011] Optionally, the water electrolysis hydrogen production unit suitable for renewable energy fluctuations also includes a feed water tank and a makeup water pump, wherein the feed water tank is connected to the anolyte circulation tank, the cathode liquid circulation tank, or a connecting pipe via the makeup water pump.

[0012] Optionally, the connecting pipe is connected in sequence to the anode chamber inlet and the cathode chamber inlet of the electrolytic cell via an alkali circulation pump and an alkali cooler.

[0013] Optionally, the water electrolysis hydrogen production device suitable for renewable energy fluctuations also includes a first flow valve and a second flow valve. The alkali cooler is connected to the anode chamber inlet of the electrolyzer through the first flow valve, and the alkali cooler is connected to the cathode chamber inlet of the electrolyzer through the second flow valve. The first flow valve and the second flow valve are electrically connected to the controller.

[0014] Optionally, the water supply pump, the alkali circulation pump, and the alkali cooler are all electrically connected to the controller.

[0015] Optionally, the water electrolysis hydrogen production device suitable for renewable energy fluctuations also includes a first variable-temperature scrubbing device and a second variable-temperature scrubbing device. The gas phase outlet of the anode gas-liquid separator is connected to the first gas phase main pipe through the first variable-temperature scrubbing device. The gas phase outlet of the anode liquid circulation tank is connected to the first gas phase main pipe through the first variable-temperature scrubbing device. The gas phase outlet of the cathode gas-liquid separator is connected to the second gas phase main pipe through the second variable-temperature scrubbing device. The gas phase outlet of the cathode liquid circulation tank is connected to the second gas phase main pipe through the second variable-temperature scrubbing device.

[0016] Optionally, the water electrolysis hydrogen production unit suitable for renewable energy fluctuations also includes an oxygen hydrogen analyzer for detecting the hydrogen content in oxygen. The oxygen hydrogen analyzer is installed on the first gas phase main and is electrically connected to the controller.

[0017] Optionally, the water electrolysis hydrogen production unit suitable for renewable energy fluctuations also includes a hydrogen oxygen analyzer for detecting the oxygen content in hydrogen. The hydrogen oxygen analyzer is installed on the second gas phase main (22) and is electrically connected to the controller.

[0018] The beneficial effects of this utility model are:

[0019] The water electrolysis hydrogen production device provided by this utility model, which is suitable for the fluctuation of renewable energy, has a structural basis for the controller to adjust the oxygen pressure, hydrogen pressure and pressure difference in the water electrolysis hydrogen production device according to the power supply fluctuation of renewable energy power distribution equipment. This makes the water electrolysis hydrogen production device more adaptable to the fluctuation of renewable energy power generation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a water electrolysis hydrogen production device according to a specific embodiment of the present invention.

[0021] Explanation of reference numerals in the attached figures

[0022] 1: Electrolytic cell;

[0023] 21: First vapor phase manifold; 22: Second vapor phase manifold; 23: First regulating valve; 24: Second regulating valve; 25: Third regulating valve; 26: Fourth regulating valve;

[0024] 31: Anode gas-liquid separator; 32: Cathode gas-liquid separator;

[0025] 41: Anode liquid circulation tank; 42: Cathode liquid circulation tank;

[0026] 5: Connecting pipe;

[0027] 61: Raw material water tank; 62: Make-up water pump;

[0028] 71: Alkali solution circulation pump; 72: Alkali solution cooler;

[0029] 81: First variable temperature washing equipment; 82: Second variable temperature washing equipment. Detailed Implementation

[0030] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] like Figure 1 As shown, this utility model provides a water electrolysis hydrogen production device suitable for the fluctuation of renewable energy. The water electrolysis hydrogen production device includes renewable energy power supply and distribution equipment, an electrolyzer 1, a first gas phase main pipe 21 for collecting the anode gas phase of the electrolyzer 1, a second gas phase main pipe 22 for collecting the cathode gas phase of the electrolyzer 1, and a controller. The electrolyzer 1 and the controller are both electrically connected to the renewable energy power supply and distribution equipment. A first regulating valve 23 and a second regulating valve 24 are arranged in parallel on the first gas phase main pipe 21, and a third regulating valve 25 and a fourth regulating valve 26 are arranged in parallel on the second gas phase main pipe 22. The diameter of the first regulating valve 23 is larger than the diameter of the second regulating valve 24, and the diameter of the third regulating valve 25 is larger than the diameter of the fourth regulating valve 26. The first regulating valve 23, the second regulating valve 24, the third regulating valve 25, and the fourth regulating valve 26 are all electrically connected to the controller.

[0032] The water electrolysis hydrogen production device configured in this way, by setting a first regulating valve 23 and a second regulating valve 24 on the first gas phase main pipe 21, and a third regulating valve 25 and a fourth regulating valve 26 on the second gas phase main pipe 22, and connecting the first regulating valve 23, the second regulating valve 24, the third regulating valve 25 and the fourth regulating valve 26 to the controller, provides a structural basis for the controller to adjust the oxygen pressure, hydrogen pressure and pressure difference in the water electrolysis hydrogen production device according to the power supply fluctuations of the renewable energy power distribution equipment, making the water electrolysis hydrogen production device more adaptable to the fluctuations of renewable energy power generation. Specifically, as an example, under this structure, when the current of the renewable energy power supply and distribution equipment rises rapidly (i.e., the rate of change of current is greater than 10 kA / s), the opening of the first regulating valve 23 and the third regulating valve 25 is adjusted by fully opening the second regulating valve 24 and the fourth regulating valve 26 to maintain the preset pressure and pressure difference, so as to adapt to the fluctuation of renewable energy power generation; when the current of the renewable energy power supply and distribution equipment drops rapidly (i.e., the rate of change of current is greater than 10 kA / s), the pressure can be quickly reduced by closing the first regulating valve 23 and the third regulating valve 25 and adjusting the opening of the second regulating valve 24 and the fourth regulating valve 26, so as to adapt to the fluctuation of renewable energy power generation.

[0033] Preferably, the diameter of the second regulating valve 24 is 20% to 80% of the diameter of the first regulating valve 23, and the diameter of the fourth regulating valve 26 is 20% to 80% of the diameter of the third regulating valve 25. Setting the first regulating valve 23, the second regulating valve 24, the third regulating valve 25, and the fourth regulating valve 26 with such diameter ratios can improve the regulating accuracy.

[0034] Preferably, the water electrolysis hydrogen production device suitable for renewable energy fluctuations further includes an anode gas-liquid separator 31, a cathode gas-liquid separator 32, an anode liquid circulation tank 41, and a cathode liquid circulation tank 42; the anode chamber outlet of the electrolyzer 1 is connected to the inlet of the anode gas-liquid separator 31, the gas phase outlet of the anode gas-liquid separator 31 is connected to the first gas phase main pipe 21, the liquid phase outlet of the anode gas-liquid separator 31 is connected to the liquid phase inlet of the anode liquid circulation tank 41, the gas phase outlet of the anode liquid circulation tank 41 is connected to the first gas phase main pipe 21, and the cathode chamber of the electrolyzer 1... The outlet is connected to the inlet of the cathode gas-liquid separator 32. The gas phase outlet of the cathode gas-liquid separator 32 is connected to the second gas phase main pipe 22. The liquid phase outlet of the cathode gas-liquid separator 32 is connected to the liquid phase inlet of the cathode liquid circulation tank 42. The gas phase outlet of the cathode liquid circulation tank 42 is connected to the second gas phase main pipe 22. The liquid phase outlet at the bottom of the anolyte circulation tank 41 is connected to the liquid phase outlet at the bottom of the cathode liquid circulation tank 42 through at least one connecting pipe 5. The inlet of the anode chamber and the inlet of the cathode chamber of the electrolytic cell 1 are respectively connected to the connecting pipe 5. In this way, the anolyte can be gas-liquid separated in the anode gas-liquid separator 31 and the anolyte circulation tank 41, and the cathode liquid can be gas-liquid separated in the cathode gas-liquid separator 32 and the cathode liquid circulation tank 42. By connecting the liquid phase outlet at the bottom of the anolyte circulation tank 41 and the liquid phase outlet at the bottom of the cathode liquid circulation tank 42 through the connecting pipe 5, it can be ensured that the concentration of the anolyte and cathode liquid returned to the electrolytic cell 1 is consistent.

[0035] Preferably, the water electrolysis hydrogen production device further includes a first flow valve and a second flow valve. The alkali cooler 72 is connected to the anode chamber inlet of the electrolyzer 1 through the first flow valve, and the alkali cooler 72 is connected to the cathode chamber inlet of the electrolyzer 1 through the second flow valve. Both the first flow valve and the second flow valve are electrically connected to the controller.

[0036] Preferably, a first level gauge is installed in the anolyte circulation tank 41, and a second level gauge is installed in the cathode liquid circulation tank 42. Both the first and second level gauges are electrically connected to the controller. This provides a structural basis for stopping the renewable energy power supply and distribution equipment when the level difference between the anolyte circulation tank 41 and the cathode liquid circulation tank 42 reaches a set limit. It prevents safety risks caused by rapid increase in gas phase pressure due to cross-contamination of anode and cathode gases or liquid phase blockage of the gas phase. The controller can trigger interlocking to automatically stop the renewable energy power supply and distribution equipment.

[0037] Preferably, the water electrolysis hydrogen production device suitable for renewable energy fluctuations further includes a raw material tank 61 and a makeup water pump 62. The raw material tank 61 is connected to the anolyte circulation tank 41, the cathode circulation tank 42, or the connecting pipe 5 via the makeup water pump 62. In this way, supplying water to the anolyte circulation tank 41, the cathode circulation tank 42, or the connecting pipe 5 via the makeup water pump 62 can achieve the purpose of adjusting the concentration of the electrolyte entering the tank.

[0038] Preferably, the connecting pipe 5 is connected to the anode chamber inlet and the cathode chamber inlet of the electrolyzer 1 in sequence through the alkali circulation pump 71 and the alkali cooler 72. When the current load of the electrolyzer 1 is high, the heat dissipation of hydrogen production by water electrolysis is large. Therefore, the alkali cooler 72 is set after the alkali circulation pump 71 to cool the electrolyte (i.e., alkali) before it re-enters the electrolyzer 1.

[0039] Preferably, the water supply pump 62, the alkali circulation pump 71, and the alkali cooler 72 are all electrically connected to the controller. Since the liquid flow rate into the electrolytic cell 1 is adjusted according to the current of the electrolytic cell 1, the amount of liquid entering the electrolytic cell 1 will cause fluctuations in the liquid flow rate at the outlet of the electrolytic cell 1, which in turn affects the fluctuations in the liquid level flowing from the outlet of the electrolytic cell 1 into the circulation tank. Therefore, electrically connecting the water supply pump 62 and the alkali circulation pump 71 to the controller provides a structural basis for adjusting the liquid flow rate into the electrolytic cell 1 and the amount of water entering the circulation tank according to changes in the current of the electrolytic cell 1.

[0040] Preferably, the water electrolysis hydrogen production device suitable for renewable energy fluctuations further includes a first temperature-controlled scrubbing device 81 and a second temperature-controlled scrubbing device 82. The gas phase outlet of the anode gas-liquid separator 31 is connected to the first gas phase main pipe 21 through the first temperature-controlled scrubbing device 81, the gas phase outlet of the anode liquid circulation tank 41 is connected to the first gas phase main pipe 21 through the first temperature-controlled scrubbing device 81, the gas phase outlet of the cathode gas-liquid separator 32 is connected to the second gas phase main pipe 22 through the second temperature-controlled scrubbing device 82, and the gas phase outlet of the cathode liquid circulation tank 42 is connected to the second gas phase main pipe 22 through the second temperature-controlled scrubbing device 82. Thus, water can be removed from oxygen through the first temperature-controlled scrubbing device 81, and water can be removed from hydrogen through the second temperature-controlled scrubbing device 82.

[0041] Preferably, the water electrolysis hydrogen production device suitable for renewable energy fluctuations further includes an oxygen-hydrogen analyzer for detecting the hydrogen content in oxygen and a hydrogen-oxygen analyzer for detecting the oxygen content in hydrogen. The oxygen-hydrogen analyzer is installed on the first gas phase main pipe 21, and the hydrogen-oxygen analyzer is installed on the second gas phase main pipe 22. Both the oxygen-hydrogen analyzer and the hydrogen-oxygen analyzer are electrically connected to the controller. This provides a structural basis for stopping the renewable energy power supply and distribution equipment when the oxygen or hydrogen content reaches a set limit, preventing safety risks caused by impure oxygen in the first gas phase main pipe 21 or impure hydrogen in the second gas phase main pipe 22. The controller can trigger an interlock to automatically stop the renewable energy power supply and distribution equipment.

[0042] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0044] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A water electrolysis hydrogen production device suitable for the volatility of renewable energy, characterized in that, It includes renewable energy power supply and distribution equipment, an electrolytic cell (1), a first gas phase manifold (21) for collecting the anode gas phase of the electrolytic cell (1), a second gas phase manifold (22) for collecting the cathode gas phase of the electrolytic cell (1), and a controller; The electrolytic cell (1) and the controller are both electrically connected to the renewable energy power supply and distribution equipment. A first regulating valve (23) and a second regulating valve (24) are arranged in parallel on the first gas phase main pipe (21), and a third regulating valve (25) and a fourth regulating valve (26) are arranged in parallel on the second gas phase main pipe (22). The diameter of the first regulating valve (23) is larger than the diameter of the second regulating valve (24), and the diameter of the third regulating valve (25) is larger than the diameter of the fourth regulating valve (26). The first regulating valve (23), the second regulating valve (24), the third regulating valve (25) and the fourth regulating valve (26) are all electrically connected to the controller.

2. The water electrolysis hydrogen production apparatus suitable for renewable energy fluctuations according to claim 1, characterized in that, The diameter of the second regulating valve (24) is 20% to 80% of the diameter of the first regulating valve (23), and the diameter of the fourth regulating valve (26) is 20% to 80% of the diameter of the third regulating valve (25).

3. The water electrolysis hydrogen production device suitable for renewable energy fluctuations according to claim 1, characterized in that, It also includes an anode gas-liquid separator (31), a cathode gas-liquid separator (32), an anode liquid circulation tank (41), and a cathode liquid circulation tank (42); The outlet of the anode chamber of the electrolytic cell (1) is connected to the inlet of the anode gas-liquid separator (31), the gas phase outlet of the anode gas-liquid separator (31) is connected to the first gas phase main pipe (21), the liquid phase outlet of the anode gas-liquid separator (31) is connected to the liquid phase inlet of the anode liquid circulation tank (41), the gas phase outlet of the anode liquid circulation tank (41) is connected to the first gas phase main pipe (21), the outlet of the cathode chamber of the electrolytic cell (1) is connected to the inlet of the cathode gas-liquid separator (32), and the gas phase outlet of the cathode gas-liquid separator (32) is connected to the inlet of the cathode gas-liquid separator (32). The outlet of the cathode gas-liquid separator (32) is connected to the second gas phase main pipe (22), the liquid phase outlet of the cathode liquid circulation tank (42) is connected to the liquid phase inlet of the cathode liquid circulation tank (42), the gas phase outlet of the cathode liquid circulation tank (42) is connected to the second gas phase main pipe (22), the liquid phase outlet at the bottom of the anode liquid circulation tank (41) is connected to the liquid phase outlet at the bottom of the cathode liquid circulation tank (42) through at least one connecting pipe (5), and the anode chamber inlet of the electrolytic cell (1) and the cathode chamber inlet of the electrolytic cell (1) are respectively connected to the connecting pipe (5).

4. The water electrolysis hydrogen production apparatus suitable for renewable energy fluctuations according to claim 3, characterized in that, A first level gauge is installed in the anolyte circulation tank (41), and a second level gauge is installed in the cathode liquid circulation tank (42). Both the first and second level gauges are electrically connected to the controller.

5. The water electrolysis hydrogen production apparatus suitable for renewable energy fluctuations according to claim 3, characterized in that, It also includes a raw material water tank (61) and a water replenishment pump (62). The raw material water tank (61) is connected to the anode liquid circulation tank (41), the cathode liquid circulation tank (42) or the connecting pipe (5) through the water replenishment pump (62).

6. The water electrolysis hydrogen production apparatus suitable for renewable energy fluctuations according to claim 5, characterized in that, The connecting pipe (5) is connected to the anode chamber inlet and the cathode chamber inlet of the electrolytic cell (1) in sequence through the alkali circulation pump (71) and the alkali cooler (72).

7. The water electrolysis hydrogen production apparatus suitable for renewable energy fluctuations according to claim 6, characterized in that, It also includes a first flow valve and a second flow valve. The alkali cooler (72) is connected to the anode chamber inlet of the electrolytic cell (1) through the first flow valve, and the alkali cooler (72) is connected to the cathode chamber inlet of the electrolytic cell (1) through the second flow valve. Both the first flow valve and the second flow valve are electrically connected to the controller.

8. The water electrolysis hydrogen production apparatus suitable for renewable energy fluctuations according to claim 6 or 7, characterized in that, The water supply pump (62), the alkali circulation pump (71), and the alkali cooler (72) are all electrically connected to the controller.

9. The water electrolysis hydrogen production apparatus suitable for renewable energy fluctuations according to claim 3, characterized in that, It also includes a first variable temperature washing device (81) and a second variable temperature washing device (82). The gas phase outlet of the anode gas-liquid separator (31) is connected to the first gas phase main pipe (21) through the first variable temperature washing device (81). The gas phase outlet of the anode liquid circulation tank (41) is connected to the first gas phase main pipe (21) through the first variable temperature washing device (81). The gas phase outlet of the cathode gas-liquid separator (32) is connected to the second gas phase main pipe (22) through the second variable temperature washing device (82). The gas phase outlet of the cathode liquid circulation tank (42) is connected to the second gas phase main pipe (22) through the second variable temperature washing device (82).

10. The water electrolysis hydrogen production apparatus for renewable energy fluctuations according to claim 1, 3, or 9, characterized in that, It also includes an oxygen hydrogen analyzer for detecting the hydrogen content in oxygen, which is installed on the first gas phase main (21) and electrically connected to the controller.

11. The water electrolysis hydrogen production apparatus suitable for renewable energy fluctuations according to claim 1, 3, or 9, characterized in that, It also includes a hydrogen oxygen analyzer for detecting the oxygen content in hydrogen, which is installed on the second gas phase main (22) and is electrically connected to the controller.

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