Electrolytic bath electrode plate, electrolytic bath and hydrogen production system

Abstract

The utility model discloses an electrode plate of an electrolytic bath, the electrolytic bath and a hydrogen production system, and belongs to the technical field of electrolytic hydrogen production. The electrode plate of the electrolytic bath comprises a polar plate, and at least one side of the polar plate defines a first reaction zone and a second reaction zone which are separated from each other; the electrode frame surrounds the outer ring of the electrode plate, a liquid inlet, a plurality of first air outlets and a plurality of second air outlets are defined by the electrode frame, the liquid inlet is communicated with the first reaction area and the second reaction area, the first air outlets are communicated with the first reaction area, the second air outlets are communicated with the second reaction area, and the first air outlets are located on the two sides of the central axis of the electrode frame respectively; and the plurality of second air outlets are respectively positioned on two sides of the central axis of the pole frame. According to the electrode plate of the electrolytic bath, the probability that gas in the first reaction zone and the second reaction zone passes through the dead zone of the electrode plate can be reduced, so that the removal efficiency of the gas in the first reaction zone and the second reaction zone is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of electrolytic hydrogen production, and in particular relates to an electrode plate of an electrolytic cell, an electrolytic cell and a hydrogen production system. Background Art

[0002] In the related art, the electrode plate is provided with two gas outlets and two liquid inlets, the two gas outlets are respectively connected to the hydrogen side reaction zone and the oxygen side reaction zone, and the two gas outlets are both located on the sides of the axis of the pole frame, the two liquid inlets are both connected to the hydrogen side reaction zone and the oxygen side reaction zone, and the two liquid inlets are respectively located on both sides of the axis of the pole frame. Therefore, part of the hydrogen and oxygen produced by the alkaline solution on the opposite side of the gas outlet in the pole plate needs to pass through the highest point of the pole plate before being discharged from the gas outlet, but the gas located at the highest point of the pole plate needs to be squeezed and driven by other gases to flow to the gas outlet, and in this process there will always be gas located at the highest point of the pole plate, thereby forming a dead zone of the electrode plate, resulting in reduced gas discharge efficiency. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes an electrode plate of an electrolyzer, an electrolyzer and a hydrogen production system, which can reduce the probability of gas in the first reaction zone and the second reaction zone passing through the electrode plate dead zone, thereby improving the removal efficiency of gas in the first reaction zone and the second reaction zone.

[0004] In a first aspect, the present application provides an electrode plate of an electrolytic cell, comprising:

[0005] An electrode plate, at least one side of which defines a first reaction zone and a second reaction zone separated from each other;

[0006] A pole frame, the pole frame surrounds the outer ring of the pole plate, the pole frame defines a liquid inlet and outlet, a plurality of first air outlets and a plurality of second air outlets, the liquid inlet is connected to both the first reaction zone and the second reaction zone, the first air outlet is connected to the first reaction zone, the second air outlet is connected to the second reaction zone, the plurality of first air outlets are respectively located on both sides of the central axis of the pole frame, and the plurality of second air outlets are respectively located on both sides of the central axis of the pole frame.

[0007] According to the electrode plate of the electrolytic cell provided in the embodiment of the present application, by arranging multiple first gas outlets and multiple second gas outlets to be respectively located on both sides of the central axis of the electrode frame, the probability of gas in the first reaction zone and the second reaction zone passing through the dead zone of the electrode plate can be reduced, thereby improving the removal efficiency of gas in the first reaction zone and the second reaction zone.

[0008] According to one embodiment of the present application, the first liquid inlet is connected to the first reaction zone through a first flow channel, the second liquid inlet is connected to the second reaction zone through a second flow channel, and the flow area of ​​the first flow channel is greater than the flow area of ​​the second flow channel.

[0009] According to one embodiment of the present application, a ratio m of a flow area of ​​the first flow channel to a flow area of ​​the second flow channel satisfies: 8 / 7≤m≤8.

[0010] According to an embodiment of the present application, a support member is provided in the first flow channel, and the support member is spaced apart from at least one side wall of the first flow channel in the width direction;

[0011] and / or,

[0012] A support member is disposed in the second flow channel, and the support member is spaced apart from at least one side wall of the second flow channel in the width direction.

[0013] According to an embodiment of the present application, there are a plurality of support members, and the plurality of support members are spaced apart and distributed along the width direction of the first flow channel;

[0014] and / or,

[0015] The plurality of support members are distributed at intervals along a width direction of the second flow channel.

[0016] According to one embodiment of the present application, there are multiple first liquid inlets and multiple second liquid inlets, and the multiple first liquid inlets are respectively located on both sides of the central axis of the pole frame, and the multiple second liquid inlets are respectively located on both sides of the central axis of the pole frame.

[0017] According to an embodiment of the present application, there are multiple first air outlets and multiple second air outlets, and the multiple first air outlets are respectively located on both sides of the central axis of the pole frame, and the multiple second air outlets are respectively located on both sides of the central axis of the pole frame.

[0018] According to one embodiment of the present application, the first liquid inlet and the second liquid inlet are located near the first end of the central axis of the pole frame, and the first air outlet and the second air outlet are located near the second end of the central axis of the pole frame.

[0019] In a second aspect, the present application provides an electrolytic cell, the electrolytic cell comprising:

[0020] An electrode plate for an electrolytic cell as described in any one of the above.

[0021] According to the electrolytic cell provided in the embodiment of the present application, by adopting any of the electrode plates 10 of the electrolytic cell described above, the probability of gas in the first reaction zone and the second reaction zone passing through the dead zone of the electrode plate can be reduced, thereby improving the removal efficiency of gas in the first reaction zone and the second reaction zone.

[0022] In a third aspect, the present application provides a hydrogen production system, the hydrogen production system comprising:

[0023] An electrolytic cell as described in any one of the above.

[0024] According to the hydrogen production system provided in the embodiment of the present application, by adopting any of the above-mentioned electrolyzers, the probability of gas in the first reaction zone and the second reaction zone passing through the dead zone of the electrode plate can be reduced, thereby improving the removal efficiency of gas in the first reaction zone and the second reaction zone.

[0025] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 This is one of the structural schematic diagrams of the electrode plate of the electrolytic cell provided in the embodiment of the present application;

[0028] Figure 2 This is the second structural schematic diagram of the electrode plate of the electrolytic cell provided in the embodiment of the present application;

[0029] Figure 3 This is the third structural schematic diagram of the electrode plate of the electrolytic cell provided in the embodiment of the present application;

[0030] Figure 4 This is the fourth structural schematic diagram of the electrode plate of the electrolytic cell provided in the embodiment of the present application;

[0031] Figure 5 This is the fifth structural schematic diagram of the electrode plate of the electrolytic cell provided in the embodiment of the present application;

[0032] Figure 6 This is the sixth structural schematic diagram of the electrode plate of the electrolytic cell provided in the embodiment of the present application;

[0033] Figure 7 This is the seventh structural schematic diagram of the electrode plate of the electrolytic cell provided in the embodiment of the present application;

[0034] Figure 8 This is the eighth structural schematic diagram of the electrode plate of the electrolytic cell provided in the embodiment of the present application;

[0035] Fig. 9 This is a ninth structural schematic diagram of an electrode plate of an electrolytic cell provided in an embodiment of the present application;

[0036] Fig.10 yes Fig. 9 The enlarged view of point A in the middle;

[0037] Fig.11 It is a schematic diagram of the gas flow path of the electrode plate of the electrolytic cell provided in an embodiment of the present application.

[0038] Reference numerals:

[0039] Electrode plate 10;

[0040] The electrode plate 100, the mastoid structure 110, and the mesh structure 120;

[0041] The pole frame 200 , the first liquid inlet 210 , the second liquid inlet 220 , the first gas outlet 230 , the second gas outlet 240 , the first flow channel 250 , the second flow channel 260 , the third flow channel 270 , the fourth flow channel 280 , and the support member 290 . DETAILED DESCRIPTION

[0042] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0043] Reference below Figure 1-Figure 11 The electrode plate 10 of the electrolyzer, the electrolyzer, and the hydrogen production system according to the embodiment of the present application are described.

[0044] The present application provides an electrode plate 10 of an electrolytic cell, such as Figure 1-Figure 9 As shown, the electrode plate 10 of the electrolytic cell includes an electrode plate 100 and an electrode frame 200 .

[0045] The electrode plate 100 may be a rectangular structure, a triangular structure or other shapes, such as Figure 1-Figure 9 As shown, the electrode plate 100 is a circular structure.

[0046] At least one side of the electrode plate 100 defines a first reaction zone and a second reaction zone separated from each other. The interior of the electrode plate 100 is a hollow structure, and a diaphragm is provided inside the electrode plate 100. The diaphragm axially separates the hollow structure of the electrode plate 100 into two mutually unconnected regions, the two regions being the first reaction zone and the second reaction zone. One of the first reaction zone and the second reaction zone is an anode reaction zone, and the other of the first reaction zone and the second reaction zone is a cathode reaction zone. For example, the first reaction zone is a cathode reaction zone, and the second reaction zone is an anode reaction zone. Then, the alkali solution undergoes an electrolysis reaction in the first reaction zone and generates hydrogen, and the alkali solution undergoes an electrolysis reaction in the second reaction zone and generates oxygen.

[0047] In some embodiments, Figure 1-Figure 3 and Figure 7 As shown, the surface of the electrode plate 100 may be provided with a mastoid structure 110 , that is, a plurality of protrusions protruding outward are provided on the surface of the electrode plate 100 to increase the current density and reduce the energy consumption of hydrogen production.

[0048] In other embodiments, Figure 4 , Figure 5 and Figure 8 As shown, the electrode plate 100 may also be a mesh structure 120 .

[0049] In some other embodiments, Figure 6 and Fig. 9 As shown, the electrode plate 100 may also be a structure in which the mastoid structure 110 and the mesh structure 120 are combined.

[0050] The pole frame 200 surrounds the outer ring of the pole plate 100, and the pole frame 200 can be a rectangular structure, a triangular structure or other shapes, such as Figure 1-Figure 9 As shown, the pole frame 200 is a circular ring structure, the pole plate 100 is located inside the pole frame 200 , and the outer periphery of the pole plate 100 is connected to the inner periphery of the pole frame 200 .

[0051] like Figure 1-Figure 9 As shown, the pole frame 200 defines a liquid inlet, a first gas outlet 230 and a second gas outlet 240. The liquid inlet, the first gas outlet 230 and the second gas outlet 240 can be circular, rectangular or other shaped structures, for example, Figure 1-Figure 9 As shown, the liquid inlet, the first air outlet 230 and the second air outlet 240 are waist-shaped structures.

[0052] like Figure 1-Figure 9As shown, the liquid inlet is connected to both the first reaction zone and the second reaction zone, the first gas outlet 230 is connected to the first reaction zone, the second gas outlet 240 is connected to the second reaction zone, the first gas outlet 230 is arranged at the first end face of the pole frame 200, and the second gas outlet 240 is arranged at the second end face of the pole frame 200. The first end face of the pole frame 200 is the end face of the pole frame 200 close to the first reaction zone, and the second end face of the pole frame 200 is the end face of the pole frame 200 close to the second reaction zone.

[0053] There are multiple first air outlets 230 and multiple second air outlets 240 . The multiple first air outlets 230 are respectively located on both sides of the central axis of the pole frame 200 , and the multiple second air outlets 240 are respectively located on both sides of the central axis of the pole frame 200 .

[0054] like Figure 1-Figure 9 and Fig.11 As shown, the first air outlet 230 and the second air outlet 240 can be three, four, five or other numbers. For example, two first air outlets 230 and two second air outlets 240 are provided, and the two first air outlets 230 are respectively located on both sides of the central axis of the pole frame 200, and the two second air outlets 240 are respectively located on both sides of the central axis of the pole frame 200.

[0055] The first air outlet 230 and the second air outlet 240 located on the same side can be arranged close to each other or arranged with a large interval, for example, Figure 1-Figure 9 and Fig.11 As shown, the first air outlet 230 and the second air outlet 240 located on the same side are arranged close to each other.

[0056] A plurality of liquid inlets may be provided, all of which are connected to the first reaction zone and the second reaction zone, and the plurality of liquid inlets are respectively located on both sides of the central axis of the pole frame 200 .

[0057] In the actual implementation process, when the electrolysis reaction occurs in the first reaction zone and the second reaction zone, the alkali solution enters the first reaction zone and the second reaction zone from the liquid inlets located on both sides of the central axis, and reacts in the first reaction zone and the second reaction zone. The gas generated after the reaction flows along the direction of the central axis of the pole frame 200 toward the first gas outlet 230 or the second gas outlet 240 and is discharged. For example, the gas located on the first side of the central axis of the pole frame 200 in the first reaction zone is discharged from the first gas outlet 230 located on the first side of the central axis of the pole frame 200, and the gas located on the second side of the central axis of the pole frame 200 in the first reaction zone is discharged from the first gas outlet 230 located on the second side of the central axis of the pole frame 200. The gas located at the central axis of the pole frame 200 in the first reaction zone is split when it is about to reach the first gas outlet 230, and flows to the first gas outlets 230 on both sides respectively. Since the height of the first gas outlet 230 is lower than the height of the end point of the central axis of the pole frame 200, the gas can be discharged without passing through the highest point of the electrode plate 100. Similarly, the discharge path of the gas in the second reaction zone can be obtained.

[0058] like Fig.11 As shown, by respectively setting a plurality of first air outlets 230 to be located on both sides of the central axis of the pole frame 200, and respectively setting a plurality of second air outlets 240 to be located on both sides of the central axis of the pole frame 200, the gas located on both sides of the central axis can be discharged from the first air outlets 230 or the second air outlets 240 on both sides, respectively, without passing through the highest point of the pole plate 100. When the gas in the middle is about to reach the highest point of the pole plate 100, it can be diverted under the action of the air outlets on both sides and discharged from the air outlets on both sides, respectively, without passing through the highest point of the pole plate 100, thereby reducing the amount of gas entering the dead zone of the pole plate 100 and improving the gas discharge efficiency.

[0059] According to the electrode plate of the electrolytic cell provided in the embodiment of the present application, by arranging the multiple first gas outlets 230 and the multiple second gas outlets 240 to be respectively located on both sides of the central axis of the electrode frame 200, the probability of the gas in the first reaction zone and the second reaction zone passing through the dead zone of the electrode plate 100 can be reduced, thereby improving the removal efficiency of the gas in the first reaction zone and the second reaction zone.

[0060] In some embodiments, the liquid inlet includes a first liquid inlet 210 and a second liquid inlet 220 , the first liquid inlet 210 is connected to the first reaction zone, and the second liquid inlet 220 is connected to the second reaction zone.

[0061] The first liquid inlet 210 and the second liquid inlet 220 are respectively connected to an alkali solution flow path, and the alkali solution flow paths of the first liquid inlet 210 and the second liquid inlet 220 are not connected to each other.

[0062] During the actual implementation process, when the electrode plate 10 undergoes an electrolytic reaction, the alkali solution enters the first liquid inlet 210 and the second liquid inlet 220 from the two alkali solution flow paths respectively, and enters the first reaction zone and the second reaction zone through the first liquid inlet 210 and the second liquid inlet 220 respectively, the alkali solution undergoes an electrolytic reaction in the first reaction zone and produces hydrogen, and the alkali solution undergoes an electrolytic reaction in the second reaction zone and produces oxygen, the generated hydrogen is discharged from the first gas outlet 230 to the subsequent hydrogen side gas-liquid separator, and the generated oxygen is discharged from the second gas outlet 240 to the subsequent oxygen side gas-liquid separator.

[0063] In the related art, a liquid inlet connected to both reaction zones is provided on the electrode plate. During the electrolysis process, the alkaline solution enters the two reaction zones respectively through the liquid inlet, and electrolysis reactions occur in the two reaction zones to produce oxygen and hydrogen, and the produced gases are discharged to the next device. However, according to the reaction equations for producing hydrogen and oxygen, the gas production on the hydrogen side is twice that of oxygen. At this time, the pressures in the two reaction zones are different. The pressure imbalance between the first reaction zone and the second reaction zone in the electrode plate 10 is balanced by the gas-liquid separator connecting pipe at the rear end. However, relative to the pressure changes in the first reaction zone and the second reaction zone in the electrode plate 10, the pressure of the gas-liquid separator regulating system is relatively lagging. At this time, the pressure on the hydrogen side increases, causing part of the alkaline solution to flow back from the liquid inlet with part of the produced hydrogen, and the refluxed alkaline solution and hydrogen may enter the reaction zone on the oxygen side through the liquid inlet, and the oxygen produced on the oxygen side will be discharged with part of the hydrogen, thereby causing the hydrogen index in oxygen to be too high.

[0064] Therefore, by providing the first liquid inlet 210 and the second liquid inlet 220 to be connected to the first reaction zone and the second reaction zone respectively, when the pressure on the hydrogen side is too high and the alkali liquid and part of the hydrogen on the hydrogen side reflux, they can flow from the first liquid inlet 210 to the corresponding alkali liquid flow channel. Since the two alkali liquid flow channels and the first liquid inlet 210 and the second liquid inlet 220 are not connected to each other, the refluxed alkali liquid and hydrogen will return to the first reaction zone even if they flow into the electrode plate 100 again, and cannot flow into the second reaction zone, thereby reducing the probability of an increase in the hydrogen index in oxygen.

[0065] According to the electrode plate 10 of the electrolytic cell provided in the embodiment of the present application, by arranging the first liquid inlet 210 and the second liquid inlet 220 to be connected to the first reaction zone and the second reaction zone respectively, the flow of generated hydrogen into the oxygen side reaction zone can be reduced, thereby reducing the probability of an increase in the hydrogen index in oxygen and improving the hydrogen production efficiency.

[0066] In some embodiments, Figure 1-Figure 10 As shown, the first liquid inlet 210 is connected to the first reaction zone through the first flow channel 250 , and the second liquid inlet 220 is connected to the second reaction zone through the second flow channel 260 . The flow area of ​​the first flow channel 250 is greater than the flow area of ​​the second flow channel 260 .

[0067] Among them, Figure 1-Figure 10 As shown, the first liquid inlet 210 and the first reaction zone are spaced apart in the radial direction, and an open first flow channel 250 is provided on the first end surface of the pole frame 200 between the first liquid inlet 210 and the first reaction zone, and both ends of the first flow channel 250 are respectively connected to the first liquid inlet 210 and the first reaction zone.

[0068] like Figure 3 As shown, the second liquid inlet 220 and the second reaction zone are spaced apart in the radial direction, and an open second flow channel 260 is provided between the second liquid inlet 220 and the second reaction zone on the second end surface of the pole frame 200, and the two ends of the second flow channel 260 are respectively connected to the second liquid inlet 220 and the second reaction zone.

[0069] The flow surfaces of the first flow channel 250 and the second flow channel 260 may be circular, trapezoidal or other shapes, for example, Figure 1-Figure 10 As shown, the flow surfaces of the first flow channel 250 and the second flow channel 260 are both rectangular structures, so the flow areas of the first flow channel 250 and the second flow channel 260 are the rectangular flow surface areas of the first flow channel 250 and the rectangular flow surface areas of the second flow channel 260 .

[0070] Because under the same conditions, the gas production on the hydrogen side is twice that on the oxygen side, the amount of alkali liquid carried away when the hydrogen side gas is discharged is larger than that carried away when the oxygen side gas is discharged, and the corresponding amount of alkali liquid supplemented on the hydrogen side is also larger than that supplemented on the oxygen side.

[0071] Therefore, by setting the flow area of ​​the first flow channel 250 to be larger than the flow area of ​​the second flow channel 260, a larger amount of alkali solution can be added to the hydrogen side during the electrolysis process, thereby improving the electrolysis efficiency of the hydrogen side in the first reaction zone and increasing the hydrogen production.

[0072] In some embodiments, a ratio m of a flow area of ​​the first flow channel 250 to a flow area of ​​the second flow channel 260 satisfies: 8 / 7≤m≤8.

[0073] Among them, the value range of m is [8 / 7, 8], and m can be specifically 8 / 7, 2, 3, 4, 5, 6, 7, 8 or other values ​​between 8 / 7-8, which are not specifically limited here.

[0074] In this embodiment, m may preferably take a value between 4 / 3-4.

[0075] By setting the ratio m of the flow area of ​​the first flow channel 250 to the flow area of ​​the second flow channel 260 to satisfy: 8 / 7≤m≤8, the difference in the amount of alkali solution added to the first reaction zone and the second reaction zone due to the ratio being too low can be reduced, thereby reducing the electrolysis efficiency on the hydrogen side. At the same time, the excess alkali solution in the first reaction zone due to the ratio being too high can be reduced, thereby causing most of the alkali solution to be discharged without electrolysis, thereby reducing the utilization rate of the alkali solution.

[0076] In some embodiments, Figure 1-Figure 10 As shown, a support member 290 is provided in the first flow channel 250, and the support member 290 is spaced apart from at least one side wall of the first flow channel 250 in the width direction, and / or a support member 290 is provided in the second flow channel 260, and the support member 290 is spaced apart from at least one side wall of the second flow channel 260 in the width direction.

[0077] The first flow channel 250 and the second flow channel 260 are both provided with a support member 290, and the support member 290 may be a trapezoidal structure, a triangular structure or other shapes, for example, Figure 1-Figure 10 As shown, the support member 290 is a rectangular structure.

[0078] like Figure 1-Figure 10 As shown, the bottom of the support member 290 in the first flow channel 250 is connected to the bottom wall of the first flow channel 250, and the support member 290 is spaced apart from at least one side wall of the first flow channel 250 in the width direction, that is, a flow channel capable of flowing alkali solution is formed between the side wall of the support member 290 and at least one side wall of the first flow channel 250 in the width direction, and the upper surface of the support member 290 can be flush with the first end surface of the pole frame 200, or it can protrude from the first end surface of the pole frame 200, and the length of the support member 290 can be equal to the length of the first flow channel 250, or it can be shorter than the length of the first flow channel 250.

[0079] like Figure 3 As shown, the bottom of the support member 290 in the second flow channel 260 is connected to the bottom wall of the second flow channel 260, and the support member 290 is spaced apart from at least one side wall of the second flow channel 260 in the width direction, that is, a flow channel capable of flowing alkali solution is formed between the side wall of the support member 290 and at least one side wall of the second flow channel 260 in the width direction, and the upper surface of the support member 290 can be flush with the second end surface of the pole frame 200, or it can protrude from the second end surface of the pole frame 200, and the length of the support member 290 can be equal to the length of the second flow channel 260, or it can be shorter than the length of the second flow channel 260.

[0080] Since there may be multiple electrode plates 10 stacked axially in the electrolytic cell, a diaphragm or gasket needs to be arranged between two adjacent electrode plates 10. If no support member 290 is provided in the first flow channel 250 and the second flow channel 260, the diaphragm or gasket may be sunken at the first flow channel 250 and the second flow channel 260, thereby blocking the first flow channel 250 and the second flow channel 260, resulting in the alkali solution being unable to flow from the first flow channel 250 and the second flow channel 260 into the first reaction zone and the second reaction zone.

[0081] Therefore, by providing the support member 290 in the first flow channel 250 and the second flow channel, the support member 290 can be used to support the diaphragm or the gasket, thereby reducing the probability of the diaphragm or the gasket being sunken in the first flow channel 250 and the second flow channel 260 .

[0082] It should be noted that if Figure 1-Figure 10 As shown, the first gas outlet 230 and the first reaction zone, and the second gas outlet 240 and the second reaction zone are connected through the third flow channel 270 and the fourth flow channel 280 respectively, and support members 290 can be set in the third flow channel 270 and the fourth flow channel 280.

[0083] In some embodiments, there are a plurality of support members 290 , and the plurality of support members 290 are spaced apart and distributed along the width direction of the first flow channel 250 , and / or the plurality of support members 290 are spaced apart and distributed along the width direction of the second flow channel 260 .

[0084] Among them, multiple rectangular support members 290 are spaced apart and distributed along the width direction of the first flow channel 250, that is, multiple support members 290 divide the wide first flow channel 250 into multiple narrow first flow channels 250, and the flow area of ​​the first flow channel 250 is the sum of the flow areas of the multiple narrow first flow channels 250.

[0085] like Figure 3 As shown, since the flow area of ​​the second flow channel 260 is small, only one support member 290 is required. Alternatively, other numbers of support members 290 may be selected according to the flow area of ​​the second flow channel 260 .

[0086] By arranging multiple support members 290 to be spaced apart and distributed along the width direction of the first flow channel 250 and the second flow channel 260, the alkaline solution flowing in from various positions of the first liquid inlet 210 and the second liquid inlet 220 can flow in from the corresponding narrow first flow channel 250 and the narrow second flow channel 260, and at the same time, a more even support force can be provided to the diaphragm or gasket, further reducing the probability of the diaphragm or gasket being sunken in the first flow channel 250 and the second flow channel 260.

[0087] In some embodiments, Figure 1As shown, the first liquid inlet 210 and the second liquid inlet 220 are located near the first end of the central axis of the pole frame 200 , and the first air outlet 230 and the second air outlet 240 are located near the second end of the central axis of the pole frame 200 .

[0088] Among them, Figure 1 As shown, the first liquid inlet 210 and the second liquid inlet 220 , the first gas outlet 230 and the second gas outlet 240 are respectively located at two ends of the pole frame 200 close to the central axis of the pole frame 200 .

[0089] During the actual implementation process, when the electrode plate 10 undergoes an electrode reaction, the alkaline solution flows into the first reaction zone and the second reaction zone from the first liquid inlet 210 and the second liquid inlet 220 near the first end of the central axis of the pole frame 200, and an electrolysis reaction occurs in the first reaction zone and the second reaction zone. The generated hydrogen and oxygen are respectively discharged with part of the alkaline solution from the first gas outlet 230 and the second gas outlet 240 near the second end of the central axis of the pole frame 200. At this time, the alkaline solution flowing in from the first liquid inlet 210 and the second liquid inlet 220 is discharged from the first gas outlet 230 and the second gas outlet 240 after a long distance.

[0090] By setting the first liquid inlet 210 and the second liquid inlet 220, the first gas outlet 230 and the second gas outlet 240 to be respectively located at the two ends of the pole frame 200 close to the central axis of the pole frame 200, the path of the alkali solution in the first reaction zone and the second reaction zone can be extended, so that the alkali solution can fully react in the first reaction zone and the second reaction zone, helping to improve the hydrogen production efficiency of the electrolyzer.

[0091] In some embodiments, Figure 1-Figure 9 As shown, there are multiple first liquid inlets 210 and multiple second liquid inlets 220 , and the multiple first liquid inlets 210 are respectively located on both sides of the central axis of the pole frame 200 , and the multiple second liquid inlets 220 are respectively located on both sides of the central axis of the pole frame 200 .

[0092] The first liquid inlet 210 and the second liquid inlet 220 may be three, four, five or other numbers, for example, Figure 1-Figure 9 As shown, two first liquid inlets 210 and two second liquid inlets 220 are provided, and the two first liquid inlets 210 are respectively located on both sides of the central axis of the pole frame 200 , and the two second liquid inlets 220 are respectively located on both sides of the central axis of the pole frame 200 .

[0093] The first liquid inlet 210 and the second liquid inlet 220 located on the same side may be arranged close to each other, or may be arranged with a large interval. For example, the first liquid inlet 210 and the second liquid inlet 220 located on the same side may be arranged close to each other.

[0094] like Figure 1-Figure 6As shown, the first liquid inlet 210 and the second liquid inlet 220 located on the same side can be a group, the first liquid inlet 210 in the two groups can also be located on different sides, and the second liquid inlet 220 in the two groups can be located on different sides, for example, Figure 1-Figure 6 As shown, the first liquid inlets 210 in the two groups are located on the left and right sides respectively, and the second liquid inlets 220 in the two groups are located on the right and left sides respectively.

[0095] like Figure 7-Figure 9 As shown, the first liquid inlets 210 in the two groups can be located on the same side, and the second liquid inlets 220 in the two groups can be located on the same side. For example, the first liquid inlets 210 in the two groups are both located on the left side, and the second liquid inlets 220 in the two groups are both located on the right side.

[0096] By locating multiple first liquid inlets 210 and multiple second liquid inlets 220 on both sides of the central axis of the pole frame 200, the amount of alkali solution entering the first reaction zone and the second reaction zone can be evenly distributed on both sides of the central axis of the pole frame 200, thereby reducing the probability that part of the alkali solution cannot be fully electrolyzed due to the accumulation of alkali solution on one side of the first reaction zone or the second reaction zone.

[0097] The embodiment of the present application further provides an electrolytic cell, which includes an electrode plate 10 of any of the above-mentioned electrolytic cells.

[0098] According to the electrolytic cell provided in the embodiment of the present application, by adopting any of the electrode plates 10 of the electrolytic cell described above, the probability of gas in the first reaction zone and the second reaction zone passing through the dead zone of the electrode plate can be reduced, thereby improving the removal efficiency of gas in the first reaction zone and the second reaction zone.

[0099] An embodiment of the present application also provides a hydrogen production system, which includes an electrolyzer as described above.

[0100] According to the hydrogen production system provided in the embodiment of the present application, by adopting any of the above-mentioned electrolyzers, the probability of gas in the first reaction zone and the second reaction zone passing through the dead zone of the electrode plate can be reduced, thereby improving the removal efficiency of gas in the first reaction zone and the second reaction zone.

[0101] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0102] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0103] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0104] In the description of the present application, “plurality” means two or more.

[0105] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0106] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0107] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0108] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An electrode plate for an electrolytic cell, characterized in that: include: An electrode plate, at least one side of which defines a first reaction zone and a second reaction zone separated from each other; A pole frame, the pole frame surrounds the outer ring of the pole plate, the pole frame defines a liquid inlet and outlet, a plurality of first air outlets and a plurality of second air outlets, the liquid inlet is connected to both the first reaction zone and the second reaction zone, the first air outlet is connected to the first reaction zone, the second air outlet is connected to the second reaction zone, the plurality of first air outlets are respectively located on both sides of the central axis of the pole frame, and the plurality of second air outlets are respectively located on both sides of the central axis of the pole frame.

2. The electrode plate of the electrolytic cell according to claim 1, characterized in that: The liquid inlet includes a first liquid inlet and a second liquid inlet, the first liquid inlet is communicated with the first reaction zone, and the second liquid inlet is communicated with the second reaction zone.

3. The electrode plate of the electrolytic cell according to claim 2, characterized in that: The first liquid inlet is connected to the first reaction zone through a first flow channel, and the second liquid inlet is connected to the second reaction zone through a second flow channel. The flow area of ​​the first flow channel is greater than the flow area of ​​the second flow channel.

4. The electrode plate of the electrolytic cell according to claim 3, characterized in that: A ratio m of a flow area of ​​the first flow channel to a flow area of ​​the second flow channel satisfies: 8 / 7≤m≤8.

5. The electrode plate of the electrolytic cell according to claim 3, characterized in that: A support member is provided in the first flow channel, and the support member is spaced apart from at least one side wall of the first flow channel in the width direction; and / or, A support member is disposed in the second flow channel, and the support member is spaced apart from at least one side wall of the second flow channel in the width direction.

6. The electrode plate of the electrolytic cell according to claim 5, characterized in that: There are a plurality of support members, and the plurality of support members are spaced apart and distributed along the width direction of the first flow channel; and / or, The plurality of support members are distributed at intervals along a width direction of the second flow channel.

7. The electrode plate of the electrolytic cell according to any one of claims 2 to 6, characterized in that: There are multiple first liquid inlets and multiple second liquid inlets, and the multiple first liquid inlets are respectively located on both sides of the central axis of the pole frame, and the multiple second liquid inlets are respectively located on both sides of the central axis of the pole frame.

8. The electrode plate of the electrolytic cell according to any one of claims 2 to 6, characterized in that: The first liquid inlet and the second liquid inlet are located near a first end of a central axis of the pole frame, and the first air outlet and the second air outlet are located near a second end of the central axis of the pole frame.

9. An electrolytic cell, characterized in that: include: An electrode plate for an electrolytic cell as claimed in any one of claims 1 to 8.

10. A hydrogen production system, characterized in that: include: The electrolytic cell of claim 9.

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