Hydrogen production system and polar plate

Abstract

The utility model discloses a hydrogen production system and a polar plate, and relates to the technical field of hydrogen production. Wherein the hydrogen production system comprises an electrolytic bath, a gas-liquid separation unit and a gas inlet pipe; the electrolytic cell is provided with an anode small chamber and a cathode small chamber, and the anode small chamber and the cathode small chamber are both provided with gas outlets; the gas-liquid separation unit is communicated with an outlet of the small electrolysis chamber and is used for obtaining crude gas; the gas inlet pipe comprises an oxygen inlet pipe and / or a hydrogen inlet pipe; when the gas inlet pipe comprises the oxygen inlet pipe, the anode small chamber is provided with an anode gas inlet, and the oxygen inlet pipe is communicated with the anode gas inlet; when the gas inlet pipe comprises the hydrogen gas inlet pipe, the cathode chamber is provided with a cathode gas inlet, and the hydrogen gas inlet pipe is communicated with the cathode gas inlet. According to the technical scheme, the operating power range of the hydrogen production system can be enlarged.

Description

Technical Field

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

[0002] In the traditional electrolytic hydrogen production process, the working load of the electrolytic cell has a certain range. When producing hydrogen from renewable energy sources such as photovoltaic and wind power, the hydrogen content in the oxygen obtained at low power exceeds the standard, or the oxygen content in the hydrogen exceeds the standard, resulting in safety risks in the operation of the hydrogen production system. Therefore, the traditional hydrogen production system cannot produce hydrogen at low power, making the operating power range of the hydrogen production system relatively narrow. Summary of the Utility Model

[0003] The main purpose of this application is to propose a hydrogen production system and a plate electrode, aiming to increase the operating power range of the hydrogen production system.

[0004] To achieve the above object, the hydrogen production system proposed in this application includes an electrolytic cell, a gas-liquid separation unit, and an inlet pipe; the electrolytic cell has an anode chamber and a cathode chamber, and both the anode chamber and the cathode chamber have gas outlets; the gas-liquid separation unit is connected to the outlet of the electrolytic cell to obtain crude gas; the inlet pipe includes an oxygen inlet pipe and / or a hydrogen inlet pipe; when the inlet pipe includes the oxygen inlet pipe, the anode chamber further has an anode gas inlet, and the oxygen inlet pipe is connected to the anode gas inlet; when the inlet pipe includes the hydrogen inlet pipe, the cathode chamber further has a cathode gas inlet, and the hydrogen inlet pipe is connected to the cathode gas inlet.

[0005] In one embodiment, a first gas buffer tank, a gas compressor, a cooler, and a second gas buffer tank are sequentially connected on the inlet pipe.

[0006] In one embodiment, a switch valve is provided on the inlet pipe.

[0007] In one embodiment, the electrolytic cell further includes an electrolyte inlet spaced from the anode gas inlet and the cathode gas inlet, the hydrogen production system further includes an electrolyte inlet pipe connected to the electrolyte inlet, and gas distributors are provided at both the anode gas inlet and the cathode gas inlet.

[0008] In one embodiment, the anode gas inlet and / or the cathode gas inlet are arranged below the electrolyte inlet.

[0009] In one embodiment, the gas-liquid separation unit includes a gas-liquid separator having an air inlet and a liquid outlet, the air inlet is connected to the gas outlet, and the liquid outlet is connected to the electrolytic cell through the electrolyte inlet pipe.

[0010] In one embodiment, the electrolytic cell includes an anolyte inlet and a catholyte inlet. The anolyte inlet coincides with the anode gas inlet, and the catholyte inlet coincides with the cathode gas inlet.

[0011] In one embodiment, the hydrogen production system further includes an anolyte inlet pipe, a catholyte inlet pipe, and at least two gas-liquid mixers. The oxygen inlet pipe and the anolyte inlet pipe are connected to the anolyte inlet through one of the gas-liquid mixers, and the hydrogen inlet pipe and the catholyte inlet pipe are connected to the catholyte inlet through the other gas-liquid mixer.

[0012] In one embodiment, the hydrogen production system further includes:

[0013] An impurity removal gas tower provided at the rear end of the gas-liquid separation unit;

[0014] A heat exchanger provided at the rear end of the impurity removal gas tower; and

[0015] A gas-water separator having an air inlet and an air outlet. The air inlet is connected to the heat exchanger, and the air outlet is connected to the inlet pipe.

[0016] In one embodiment, the hydrogen production system further includes a gas purification unit provided at the rear end of the gas-liquid separation unit; and the outlet end of the gas purification unit is connected to the inlet pipe.

[0017] The present application also provides a plate electrode, which is applied to the above hydrogen production system. The plate electrode is provided with the anode gas inlet and the cathode gas inlet, and a gas distributor is provided at the anode gas inlet and / or the cathode gas inlet.

[0018] In one embodiment, the plate electrode is further provided with an electrolyte inlet, and the anode gas inlet and / or the cathode gas inlet are arranged lower than the electrolyte inlet.

[0019] Through connecting the gas-liquid separation unit with the gas outlet, the technical solution of the present application can preliminarily separate gas and liquid from the gas discharged from the electrolytic cell, and then obtain crude gas. When the intake pipe includes an oxygen intake pipe, and the oxygen intake pipe is connected to the anode gas inlet, qualified oxygen can be introduced into the anode chamber of the electrolytic cell through the anode gas inlet, thereby reducing the hydrogen content in the oxygen discharged from the electrolytic cell and reducing the risk that the hydrogen content in the oxygen is too high to be applicable to low-power operation in the low-power operation scenario of the electrolytic cell. Therefore, the operating power range of the hydrogen production system in the technical solution of the present application is relatively large. When the intake pipe includes a hydrogen intake pipe, and the hydrogen intake pipe is connected to the cathode gas inlet, qualified hydrogen can be introduced into the cathode chamber of the electrolytic cell through the cathode gas inlet, thereby reducing the oxygen content in the hydrogen discharged from the electrolytic cell and reducing the risk that the oxygen content in the hydrogen is too high to be applicable to low-power operation in the low-power operation scenario of the electrolytic cell. Therefore, the operating power range of the hydrogen production system in the technical solution of the present application is relatively large. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0021] Figure 1 FIG. is a schematic structural diagram of an embodiment when the intake pipe in the hydrogen production system provided by the present application only includes an oxygen intake pipe;

[0022] Figure 2 FIG. is a schematic structural diagram of another embodiment when the intake pipe in the hydrogen production system provided by the present application only includes an oxygen intake pipe;

[0023] Figure 3 FIG. is a schematic structural diagram of still another embodiment when the intake pipe in the hydrogen production system provided by the present application only includes an oxygen intake pipe;

[0024] Figure 4 FIG. is a schematic structural diagram of an embodiment of the electrode plate in the electrolytic cell of the hydrogen production system provided by the present application;

[0025] Figure 5 FIG. is a schematic structural diagram of an embodiment when the intake pipe in the hydrogen production system provided by the present application includes both an oxygen intake pipe and there are multiple electrolytic cells;

[0026] Figure 6 FIG. is a schematic structural diagram of an embodiment when the intake pipe in the hydrogen production system provided by the present application includes both an oxygen intake pipe and a hydrogen intake pipe;

[0027] Figure 7 Schematic diagram of another embodiment when the intake pipe in the hydrogen production system provided by the present application includes only an oxygen intake pipe and also includes a hydrogen intake pipe;

[0028] Figure 8 Schematic diagram of yet another embodiment when the intake pipe in the hydrogen production system provided by the present application includes only an oxygen intake pipe and also includes a hydrogen intake pipe;

[0029] Figure 9 Schematic diagram of an embodiment when the intake pipe in the hydrogen production system provided by the present application includes only an oxygen intake pipe and also includes a hydrogen intake pipe, and there are multiple electrolytic cells.

[0030] Explanation of the reference numerals in the drawings:

[0031] 100, electrolytic cell; 101, electrode plate; 110, anode gas inlet; 120, cathode gas inlet; 130, gas outlet; 140, electrolyte inlet; 141, anode electrolyte inlet; 142, cathode electrolyte inlet; 150, gas distributor;

[0032] 200, gas-liquid separation unit; 210, gas-liquid separator;

[0033] 300, intake pipe; 310, oxygen intake pipe; 320, hydrogen intake pipe;

[0034] 410, first gas buffer tank; 420, gas compressor; 430, cooler; 440, second gas buffer tank; 450, switch valve;

[0035] 500, electrolyte inlet pipe; 510, anode electrolyte inlet pipe; 520, cathode electrolyte inlet pipe;

[0036] 610, impurity removal gas tower; 620, heat exchanger; 630, gas-water separator;

[0037] 700, gas purification unit;

[0038] 800, gas-liquid mixer.

[0039] The realization, functional features and advantages of the object of the present application will be further described in conjunction with the embodiments with reference to the accompanying drawings. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying 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. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0041] 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 position relationship and movement conditions between components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0042] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood 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 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 ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present application.

[0043] In the traditional electrolytic hydrogen production process, the working load of the electrolytic cell has a certain range. When producing hydrogen from renewable energy sources such as photovoltaic and wind power, the hydrogen content in the oxygen obtained at low power exceeds the standard, or the oxygen content in the hydrogen exceeds the standard, resulting in safety risks in the operation of the hydrogen production system. Therefore, the traditional hydrogen production system cannot produce hydrogen at low power, making the operating power range of the hydrogen production system relatively narrow.

[0044] In order to increase the operating power range of the hydrogen production system, the present application proposes a hydrogen production system.

[0045] Please refer to Figures 1 to 9, in an embodiment of the present application, the hydrogen production system includes an electrolytic cell 100, a gas-liquid separation unit 200, and an inlet pipe 300; the electrolytic cell 100 has an anode chamber and a cathode chamber, and both the anode chamber and the cathode chamber have a gas outlet 130; the gas-liquid separation unit 200 is communicated with the electrolytic cell outlet to obtain crude gas; the inlet pipe 300 includes an oxygen inlet pipe 310 and / or a hydrogen inlet pipe 320; when the inlet pipe 300 includes the oxygen inlet pipe 310, the anode chamber further has an anode gas inlet 110, and the oxygen inlet pipe 310 is communicated with the anode gas inlet 110; when the inlet pipe 300 includes the hydrogen inlet pipe, the cathode chamber further has a cathode gas inlet 120, and the hydrogen inlet pipe 320 is communicated with the cathode gas inlet 120.

[0046] An electrolyte is provided in the electrolytic cell 100, and the electrolyte can be pure water or an alkaline solution. Under the action of electrolysis, hydrogen and oxygen are generated in the electrolytic cell of the electrolytic cell 100. Specifically, the electrolytic cell includes an anode chamber and a cathode chamber, oxygen is generated in the anode chamber, and hydrogen is generated in the cathode chamber. The gas outlet 130 of the electrolytic cell 100 includes an anode outlet and a cathode outlet, the anode outlet is communicated with the anode chamber, and the cathode outlet is communicated with the cathode chamber. It can be understood that a small amount of electrolyte is mixed in the gas discharged from the gas outlet 130. Since the gas-liquid separation unit 200 is communicated with the gas outlet 130, the electrolyte contained in the gas can be preliminarily removed, and then crude gas can be obtained. Specifically, the gas-liquid separation unit 200 can include a first gas-liquid separation component and a second gas-liquid separation component, wherein the first gas-liquid separation component is communicated with the anode outlet to remove the electrolyte in the oxygen, and then obtain crude oxygen; the second gas-liquid separation component is communicated with the cathode outlet to remove the electrolyte in the hydrogen, and then obtain crude hydrogen.

[0047] Since the operating power of the electrolytic cell 100 has a certain range, when it is lower than the operating power, the hydrogen content in the oxygen will exceed the standard, or the oxygen content in the hydrogen will exceed the standard. In the technical solution of the present application, when the hydrogen content in the oxygen exceeds the standard and the oxygen content in the hydrogen does not exceed the standard, the inlet pipe 300 can only include a qualified oxygen pipe, or can also include a qualified hydrogen pipe. The oxygen inlet pipe 310 is communicated with the anode gas inlet 110 of the anode chamber, so that qualified oxygen can be introduced into the electrolytic cell 100 through the anode gas inlet 110, thereby increasing the oxygen content and decreasing the hydrogen content discharged from the anode outlet of the electrolytic cell 100, reducing the risk of safety accidents, and making the hydrogen production system also applicable to the scenario of low-power operation.

[0048] Please refer to Figures 1 to 3, when the oxygen content in hydrogen exceeds the standard while the hydrogen content in oxygen does not exceed the standard, the intake pipe 300 may only include a qualified hydrogen pipe or may also include a qualified oxygen pipe. The hydrogen intake pipe 320 is connected to the cathode gas inlet 120 of the cathode chamber, so that qualified hydrogen can be introduced into the electrolytic cell 100 through the cathode gas inlet 120, thereby increasing the hydrogen content and decreasing the oxygen content discharged from the cathode outlet of the electrolytic cell 100, reducing the risk of safety accidents and making the hydrogen production system also applicable to low-power operation scenarios.

[0049] Please refer to Figures 6 to 9 , when the oxygen content in hydrogen exceeds the standard and the hydrogen content in oxygen also exceeds the standard, the intake pipe 300 includes both an oxygen intake pipe 310 and a hydrogen intake pipe 320. The oxygen intake pipe 310 is connected to the anode gas inlet 110, and the hydrogen intake pipe 320 is connected to the cathode gas inlet 120, so that qualified oxygen can be introduced into the anode chamber of the electrolytic cell 100 through the anode gas inlet 110, and qualified hydrogen can be introduced into the electrolytic cell 100 through the cathode gas inlet 120. As a result, the oxygen content discharged from the anode outlet of the electrolytic cell 100 is relatively high and the hydrogen content is relatively low, and the hydrogen content discharged from the cathode outlet of the electrolytic cell 100 is relatively high and the oxygen content is relatively low, reducing the risk of safety accidents and making the hydrogen production system also applicable to low-power operation scenarios.

[0050] By connecting the gas-liquid separation unit 200 to the gas outlet 130, the technical solution of the present application can preliminarily separate gas and liquid from the gas discharged from the electrolytic cell 100 to obtain crude gas. When the intake pipe 300 includes an oxygen intake pipe 310, the oxygen intake pipe 310 is connected to the anode gas inlet 110, so that qualified oxygen can be introduced into the anode chamber of the electrolytic cell 100 through the anode gas inlet 110, thereby reducing the hydrogen content in the oxygen discharged from the electrolytic cell 100 and reducing the risk that the hydrogen content in the oxygen is too high to be applicable to low-power operation scenarios during low-power operation of the electrolytic cell 100. Therefore, the power range of the hydrogen production system in the technical solution of the present application is relatively large. When the intake pipe 300 includes a hydrogen intake pipe 320, the hydrogen intake pipe 320 is connected to the cathode gas inlet 120, so that qualified hydrogen can be introduced into the cathode chamber of the electrolytic cell 100 through the cathode gas inlet 120, thereby reducing the oxygen content in the hydrogen discharged from the electrolytic cell 100 and reducing the risk that the oxygen content in the hydrogen is too high to be applicable to low-power operation scenarios during low-power operation of the electrolytic cell 100. Therefore, the power range of the hydrogen production system in the technical solution of the present application is relatively large.

[0051] Such as Figure 1As shown, in the embodiment of the present application, a first gas buffer tank 410, a gas compressor 420, a cooler 430, and a second gas buffer tank 440 are successively connected on the intake pipe 300.

[0052] It should be noted that the intake pipe 300 is provided with a first gas buffer tank 410, a gas compressor 420, a cooler 430, and a second gas buffer tank 440 connected in sequence, which means that when only the oxygen intake pipe 310 is included on the intake pipe 300, the oxygen intake pipe 310 is provided with a first gas buffer tank 410, a gas compressor 420, a cooler 430, and a second gas buffer tank 440 connected in sequence; or when only the hydrogen intake pipe 320 is included on the intake pipe 300, the hydrogen intake pipe 320 is provided with a first gas buffer tank 410, a gas compressor 420, a cooler 430, and a second gas buffer tank 440 connected in sequence; or, when both the oxygen intake pipe 310 and the hydrogen intake pipe 320 are included on the intake pipe 300, at least one of the oxygen intake pipe 310 and the hydrogen intake pipe 320 is provided with a first gas buffer tank 410, a gas compressor 420, a cooler 430, and a second gas buffer tank 440 connected in sequence.

[0053] By arranging the gas compressor 420 on the intake pipe 300, the pressure of the gas before entering the electrolytic cell 100 can be increased, thereby ensuring that the gas can enter the electrolytic cell 100.

[0054] By arranging the first gas buffer tank 410 at the front end of the gas compressor 420, the pressure of the gas entering the gas compressor 420 is ensured to be relatively stable, avoiding the risk of gas pressure fluctuations.

[0055] It can be understood that after the gas compressor 420 compresses the qualified gas, the temperature of the gas discharged from the gas compressor 420 is relatively high. In order to avoid the gas temperature entering the electrolytic cell 100 from being too high, by arranging the cooler 430, the effect of cooling the gas discharged from the gas compressor 420 can be achieved.

[0056] By arranging the second gas buffer tank 440 at the rear end of the cooler 430, the second gas buffer tank 440 can re-stabilize the pressure of the gas before entering the electrolytic cell 100, avoiding the risk of damage to the electrolytic cell 100 caused by fluctuations in the gas pressure entering the electrolytic cell 100.

[0057] As Figure 1 shown, in the embodiment of the present application, a switch valve 450 is provided on the intake pipe 300.

[0058] It should be noted that the intake pipe 300 is provided with a switching valve 450, which means that when the intake pipe 300 only includes the oxygen intake pipe 310, the oxygen intake pipe 310 is provided with a switching valve 450; or when the intake pipe 300 only includes the hydrogen intake pipe 320, the hydrogen intake pipe 320 is provided with a switching valve 450; or, when the intake pipe 300 includes both the oxygen intake pipe 310 and the hydrogen intake pipe 320, the switching valve 450 is provided on at least one of the oxygen intake pipe 310 and the hydrogen intake pipe 320.

[0059] By providing the switching valve 450 on the intake pipe 300, it is possible to control whether the qualified gas in the intake pipe 300 is introduced into the electrolytic cell 100, so that both the operating power range of the electrolytic cell 100 can be increased and the energy consumption can be reduced when the electrolytic cell 100 operates at normal power. For example, when the electrolytic cell 100 operates within the normal power range, the hydrogen content in the oxygen discharged from the gas outlet 130 of the electrolytic cell 100 does not exceed the standard, and the oxygen content in the hydrogen does not exceed the standard either. At this time, the switching valve 450 on the intake pipe 300 can be closed. When the electrolytic cell 100 operates in a low-power state, if it is detected that the hydrogen content in the discharged oxygen is relatively high, the switching valve 450 on the oxygen intake pipe 310 is controlled to be in an open state so that qualified oxygen is introduced into the electrolytic cell 100, thereby reducing the hydrogen content in the oxygen discharged from the electrolytic cell 100. Of course, it can be understood that when the electrolytic cell 100 operates in a low-power state, if it is detected that the oxygen content in the discharged hydrogen is relatively high, the switching valve 450 on the hydrogen intake pipe 320 is controlled to be in an open state so that qualified hydrogen is introduced into the electrolytic cell 100, thereby reducing the oxygen content in the hydrogen discharged from the electrolytic cell 100. In this way, the electrolytic cell 100 can also adapt to low-power operation, expanding the operating power range of the electrolytic cell 100.

[0060] Please refer to Figures 1 to 4 , in an embodiment of the present application, the electrolytic chamber further includes an electrolyte inlet 140 spaced from the anode gas inlet 110 and the cathode gas inlet 120, and the hydrogen production system further includes an electrolyte inlet pipe 500, and the electrolyte inlet pipe 500 communicates with the electrolyte inlet 140, and gas distributors 150 are provided at both the anode gas inlet 110 and the cathode gas inlet 120.

[0061] By isolating both the anode gas inlet 110 and the cathode gas inlet 120 from the electrolyte inlet 140, the introduction of qualified gas is isolated from the introduction of electrolyte. By providing gas distributors 150 at both the anode gas inlet 110 and the cathode gas inlet 120, the qualified oxygen can be more evenly distributed after entering the electrolytic cell 100 through the anode gas inlet 110, and the qualified hydrogen can also be more evenly distributed after entering the electrolytic cell 100 through the cathode gas inlet 120.

[0062] Specifically, the electrolyte inlet pipe 500 can be connected to an external electrolyte supply source or to a separation component in the hydrogen production system that can separate the electrolyte, so that the separated electrolyte can flow back into the electrolytic cell 100 through the electrolyte inlet pipe 500.

[0063] As Figure 4 shown, further, the anode gas inlet 110 and / or the cathode gas inlet 120 are arranged below the electrolyte inlet 140.

[0064] By arranging the anode gas inlet 110 below the electrolyte inlet 140, the anode gas can float up and be fully dispersed in the electrolyte in the anode chamber, thereby reducing the risk of gas-liquid stratification in the anode chamber. By arranging the cathode gas inlet 120 below the electrolyte inlet 140, the cathode gas can float up and be fully dispersed in the electrolyte in the cathode chamber, thereby reducing the risk of gas-liquid stratification in the cathode chamber.

[0065] Please refer to Figures 1 to 3 , in one example, the gas-liquid separation unit 200 includes a gas-liquid separator 210. The gas-liquid separator 210 has an air inlet and a liquid outlet. The air inlet is connected to the gas outlet 130, and the liquid outlet is connected to the electrolyte inlet pipe 500.

[0066] By connecting the gas-liquid separator 210 to the electrolyte inlet pipe 500, the electrolyte separated by the gas-liquid separator 210 can flow back into the electrolytic cell 100 through the electrolyte inlet pipe 500, thereby achieving the effect of repeated recycling of the electrolyte and reducing the phenomenon of resource waste.

[0067] Of course, the gas-liquid separation unit 200 may further include other components such as a scrubber. It should be noted that since the gas-liquid separation unit 200 is common knowledge to those skilled in the art, it will not be elaborated in detail here.

[0068] Please refer to Figures 6 to 9 , in another embodiment of the present application, the electrolytic cell 100 includes an anode electrolyte inlet 141 and a cathode electrolyte inlet 142. The anode electrolyte inlet 141 coincides with the anode gas inlet 110, and the cathode electrolyte inlet 142 coincides with the cathode gas inlet 120.

[0069] By making the anode electrolyte inlet 141 coincide with the anode gas inlet 110 and the cathode electrolyte inlet 142 coincide with the cathode gas inlet 120, the number of inlets opened on the electrode plates of the electrolytic cell 100 can be reduced, making the manufacturing process of the electrode plates of the electrolytic cell 100 simpler.

[0070] Please refer to Figures 6 to 9, Further, the hydrogen production system further includes an anolyte inlet pipe 510, a catholyte inlet pipe 520, and at least two gas-liquid mixers 800. The oxygen inlet pipe 310 and the anolyte inlet pipe 510 are connected to the anolyte inlet 141 through a gas-liquid mixer 800, and the hydrogen inlet pipe 320 and the catholyte inlet pipe 520 are connected to the catholyte inlet 142 through another gas-liquid mixer 800.

[0071] With such a setting, the gas and the electrolyte are mixed more evenly, thereby reducing the risk of gas-liquid stratification.

[0072] Specifically, the anolyte inlet pipe 510 refers to the electrolyte inlet pipe 500 connected to the anodic chamber of the electrolyzer 100, and the catholyte inlet pipe 520 refers to the electrolyte inlet pipe 500 connected to the cathodic chamber of the electrolyzer 100. Wherein the anolyte inlet pipe 510 and / or the catholyte inlet pipe 520 can be connected to an external electrolyte supply source, or can be connected to a separation component in the hydrogen production system that can separate the electrolyte, such as the above-mentioned gas-liquid separator 210, so that the separated electrolyte can flow back into the electrolyzer 100 through the anolyte inlet pipe 510 and / or the catholyte inlet pipe 520.

[0073] Please refer to Figure 1 , Figure 5 and Figure 6 , In an embodiment of the present application, the hydrogen production system further includes an impurity removal gas tower 610, a heat exchanger 620, and a gas-water separator 630. The impurity removal gas tower 610 is arranged at the rear end of the gas-liquid separation unit 200; the heat exchanger 620 is arranged at the rear end of the impurity removal gas tower 610; the gas-water separator 630 has an air inlet and an air outlet. The air inlet is connected to the heat exchanger 620, and the air outlet is connected to the inlet pipe 300.

[0074] By arranging the impurity removal gas tower 610 at the rear end of the gas-liquid separation unit 200, unnecessary gases can be removed, so that the crude gas can be made closer to the standard of qualified gas.

[0075] Since the temperature of the gas discharged after impurity removal is relatively high, by arranging the heat exchanger 620 at the rear end of the impurity removal gas tower 610, the gas discharged from the impurity removal gas tower 610 can be cooled to make it within a suitable temperature range. By connecting the air inlet of the gas-water separator 630 to the heat exchanger 620 and the air outlet to the inlet pipe 300, the cooled gas can be subjected to gas-water separation after entering the gas-water separator 630, thereby reducing the moisture contained in the gas and avoiding the risk of containing more moisture when it enters the compressor provided on the inlet pipe of the qualified gas.

[0076] Specifically, when the gas-liquid separation unit 200 is a hydrogen separation unit, the impurity-removing gas tower 610 connected thereto is a deoxidation tower; when the gas-liquid separation unit 200 is an oxygen separation unit, the impurity-removing gas tower 610 connected thereto is a dehydrogenation tower.

[0077] Please refer to Figure 2 , Figure 7 and Figure 9 , in another embodiment of the present application, the hydrogen production system further includes a gas purification unit 700, and the gas purification unit 700 is disposed at the rear end of the gas-liquid separation unit 200; and the gas outlet end of the gas purification unit 700 is connected to the intake pipe 300.

[0078] It can be understood that the gas discharged from the gas-liquid separation unit 200 is a crude gas. Then, by disposing the gas purification unit 700 at the rear end of the gas-liquid separation unit 200, the gas purification unit 700 can further purify the crude gas discharged from the gas-liquid separation unit 200, so that the gas discharged from the gas purification unit 700 is a qualified gas. Connecting the intake pipe 300 directly to the gas purification unit 700 can ensure that the gas entering the intake pipe 300 is a qualified gas.

[0079] In addition to the above-mentioned impurity-removing gas tower 610, heat exchanger 620, and gas-water separator 630, the gas purification unit 700 in this embodiment further includes a drying tower, and the drying tower is disposed at the rear end of the gas-water separator 630, thereby further improving the dryness of the gas discharged from the gas purification unit 700.

[0080] Please refer to Figure 3 and Figure 8 , in yet another embodiment of the present application, the intake pipe 300 can be connected to an external qualified gas source. Specifically, when the intake pipe 300 is an oxygen intake pipe 310, it is connected to an external qualified oxygen source; when the intake pipe 300 is a hydrogen intake pipe 320, it is connected to an external qualified hydrogen source. With such a setting, the number of components in the hydrogen production system can be reduced, and the pipeline connection structure of the hydrogen production system can be simplified.

[0081] In the embodiment of the present application, a gas content analyzer is provided at the outlet end of the gas-liquid separation unit 200.

[0082] By providing a gas content analyzer at the outlet end of the gas-liquid separator 210, it is possible to monitor whether the gas discharged from the gas-liquid separation unit 200 is qualified through the gas content analyzer. For example, when the gas-liquid separation unit 200 is a hydrogen separation unit, the gas content analyzer can be an oxygen content analyzer. Thus, when the oxygen content displayed by the oxygen content analyzer is relatively high, the hydrogen inlet pipe 320 can be controlled to communicate with the cathode chamber of the electrolyzer 100; when the gas-liquid separation unit 200 is an oxygen separation unit, the gas content analyzer can be a hydrogen content analyzer. Thus, when the hydrogen content displayed by the hydrogen content analyzer is relatively high, the oxygen inlet pipe 310 can be controlled to communicate with the anode chamber of the electrolyzer 100.

[0083] Please refer to Figure 5 and Figure 9 , in the embodiments of the present application, the hydrogen production system includes at least two electrolyzers 100, and the at least two electrolyzers 100 are arranged in parallel.

[0084] With such an arrangement, the qualified gas can enter the corresponding electrolysis chambers in multiple electrolyzers 100. Specifically, the qualified oxygen can enter the anode chambers of multiple electrolyzers 100. Thus, the hydrogen content in the oxygen discharged from the gas outlet 130 of the anode chamber after the electrolysis reaction does not exceed the standard; and / or, the qualified hydrogen can enter the cathode chambers of multiple electrolyzers 100. Thus, the oxygen content in the hydrogen discharged from the gas outlet 130 of the cathode chamber after the electrolysis reaction does not exceed the standard. The mixture that undergoes the electrolysis reaction and is discharged from the gas outlet 130 enters the gas-liquid separation unit 200. The separated liquid can be refluxed into the electrolyzer 100, and the separated gas can be discharged out of the system or purified through the gas purification unit 700. The gas that undergoes at least partial purification treatment process can be communicated with the inlet pipe 300 to facilitate the provision of qualified gas and avoid the use of a separate qualified gas source.

[0085] Among them, when the hydrogen production device operates at a normal predetermined load, the on-off valve 450 on the inlet pipe 300 can be closed to avoid waste of qualified gas. When the hydrogen production device operates at low power, the components on the inlet pipe 300 are opened so that the components on the inlet pipe 300 are in a working state.

[0086] The present application also proposes a plate 101, as Figure 4 shown. This plate 101 is applied to the above-mentioned hydrogen production system. The plate 101 is provided with an anode gas inlet 110 and a cathode gas inlet 120, and a gas distributor is provided at the anode gas inlet 110 and / or the cathode gas inlet 120.

[0087] By providing gas distributors 150 at both the anode gas inlet 110 and the cathode gas inlet 120, it is possible to make the qualified oxygen more evenly distributed after entering the electrolytic cell 100 through the anode gas inlet 110, and also make the qualified hydrogen more evenly distributed after entering the electrolytic cell 100 through the cathode gas inlet 120.

[0088] Furthermore, the electrode plate 101 is also provided with an electrolyte inlet 140, and the anode gas inlet 110 and / or the cathode gas inlet 120 are arranged lower than the electrolyte inlet 140.

[0089] By arranging the anode gas inlet 110 lower than the electrolyte inlet 140, the anode gas can float up and be fully dispersed in the electrolyte of the anode chamber, thereby reducing the risk of gas-liquid stratification in the anode chamber. By arranging the cathode gas inlet 120 lower than the electrolyte inlet 140, the cathode gas can float up and be fully dispersed in the electrolyte of the cathode chamber, thereby reducing the risk of gas-liquid stratification in the cathode chamber.

[0090] The above description is only an exemplary embodiment of the present application, and does 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 system, characterized in that, Comprising: An electrolytic cell having an anodic chamber and a cathodic chamber, both the anodic chamber and the cathodic chamber having gas outlets; A gas-liquid separation unit communicating with the gas outlet; and An inlet pipe including an oxygen inlet pipe and / or a hydrogen inlet pipe; when the inlet pipe includes the oxygen inlet pipe, the anodic chamber further has an anodic gas inlet, and the oxygen inlet pipe communicates with the anodic gas inlet; when the inlet pipe includes the hydrogen inlet pipe, the cathodic chamber further has a cathodic gas inlet, and the hydrogen inlet pipe communicates with the cathodic gas inlet.

2. The hydrogen production system according to claim 1, wherein A first gas buffer tank, a gas compressor, a cooler and a second gas buffer tank are sequentially connected on the inlet pipe.

3. The hydrogen production system according to claim 1, wherein A switching valve is provided on the inlet pipe.

4. The hydrogen production system according to claim 1, wherein The electrolytic cell further includes an electrolyte inlet spaced from the anodic gas inlet and the cathodic gas inlet, and the hydrogen production system further includes an electrolyte inlet pipe communicating with the electrolyte inlet, and gas distributors are provided at both the anodic gas inlet and the cathodic gas inlet.

5. The hydrogen production system according to claim 4, characterized in that, The anodic gas inlet and / or the cathodic gas inlet is arranged lower than the electrolyte inlet.

6. The hydrogen production system according to claim 4, wherein, The gas-liquid separation unit includes a gas-liquid separator having an air inlet and a liquid outlet, the air inlet communicating with the gas outlet, and the liquid outlet communicating with the electrolytic cell through the electrolyte inlet pipe.

7. The hydrogen production system according to claim 1, characterized in that The electrolytic cell includes an anodic electrolyte inlet and a cathodic electrolyte inlet, the anodic electrolyte inlet coinciding with the anodic gas inlet, and the cathodic electrolyte inlet coinciding with the cathodic gas inlet.

8. The hydrogen production system according to claim 7, wherein The hydrogen production system further includes an anodic electrolyte inlet pipe, a cathodic electrolyte inlet pipe and at least two gas-liquid mixers, the oxygen inlet pipe and the anodic electrolyte inlet pipe communicating with the anodic electrolyte inlet through one of the gas-liquid mixers, and the hydrogen inlet pipe and the cathodic electrolyte inlet pipe communicating with the cathodic electrolyte inlet through the other gas-liquid mixer.

9. The hydrogen production system according to any one of claims 1 to 8, characterized in that, The hydrogen production system further includes: An impurity removal gas tower provided at the rear end of the gas-liquid separation unit; A heat exchanger provided at the rear end of the impurity removal gas tower; and A gas-water separator having an air inlet and an air outlet, the air inlet communicating with the heat exchanger, and the air outlet communicating with the inlet pipe.

10. The hydrogen production system according to any one of claims 1 to 8, characterized in that, The hydrogen production system further includes a gas purification unit provided at the rear end of the gas-liquid separation unit; and the gas outlet end of the gas purification unit communicates with the inlet pipe.

11. A plate, characterized in that, The electrode plate is applied to the hydrogen production system according to any one of claims 1 to 10, the electrode plate is provided with the anodic gas inlet and the cathodic gas inlet, and a gas distributor is provided at the anodic gas inlet and / or the cathodic gas inlet.

12. The plate according to claim 11, characterized in that, The electrode plate is further provided with an electrolyte inlet, and the anodic gas inlet and / or the cathodic gas inlet is arranged lower than the electrolyte inlet.

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