Electrolytic hydrogen production electrode frame

Abstract

The utility model discloses an electrolytic hydrogen production pole frame which comprises a pole frame body (1), and the pole frame body (1) comprises a sealing surface (2), a runner surface (3), a diaphragm table (4), an electrode table (5) and a main pole plate mounting surface (6) which are arranged in a stepped manner; the diaphragm table (4) is used for placing and limiting the diaphragm (7); the electrode table (5) is used for assembling, fixing and limiting the electrode (8); the main polar plate mounting surface (6) is used for mounting a main polar plate (9); and a supporting structure (10) is arranged between the main polar plate (9) and the electrode (8). According to the utility model, the electrode and the diaphragm are limited on the electrode frame, so that the assembly precision is improved; and secondly, the electrode frame body, the electrode and the supporting structure are pre-assembled to form a module unit, so that the assembling efficiency of the electrolytic cell is improved. And finally, by changing the flow channel form of the electrode frame, the fluid and temperature distribution in the small electrolysis chamber is more uniform, and the energy consumption of the electrolysis cell is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of equipment for producing hydrogen by electrolyzing water, in particular to an electrolytic hydrogen production pole frame, and more particularly to a flow field uniform electrolytic hydrogen production pole frame suitable for module assembly. Background Art

[0002] At present, electrolyzers have been developed towards larger sizes (i.e. higher hydrogen production) to meet the growing demand for hydrogen energy. This trend is mainly reflected in increasing the number of electrolysis cells and increasing the reaction area of ​​the cells.

[0003] The basic structure of an electrolytic cell includes plates, diaphragms, electrodes, support structures, gaskets and other components, which are then assembled by stacking and pressing each component. Currently, high-power electrolytic cells have hundreds of electrolytic chambers and a large reaction area. They need to be stacked in sequence during assembly. However, a large area can easily affect assembly accuracy, and more assembly components can affect assembly efficiency.

[0004] In addition, the electrolyte enters the electrolytic cell and reacts in the electrolytic chamber, and the main component that provides support for each chamber is the pole frame. The structure of the pole frame will not only affect the transmission of force and the coordination with the sealing gasket, but the form of the chamber flow channel of the pole frame will also affect the flow direction of the electrolyte. If it is unreasonable, there may even be a dead zone in the flow, affecting the uniformity of the chamber flow field and temperature, thereby reducing the efficiency of the electrolytic cell and shortening the service life of the electrolytic cell.

[0005] Therefore, for high-power electrolytic cells with hundreds of electrolytic chambers, how to improve their assembly accuracy, assembly efficiency, and uniformity of the chamber flow field and temperature is an urgent problem that people hope to solve.

[0006] In order to solve the above problems, the present utility model is proposed. Utility Model Content

[0007] In order to solve the above problems, the utility model provides a solution: the reliability of the electrolytic cell is improved by changing the structure of the pole frame, specifically by increasing the flow channel surface, diaphragm platform, electrode platform and main plate mounting surface arranged in a stepped form. The diaphragm platform and the electrode platform can install the diaphragm and the electrode and play a limiting role. The electrode can be fixed on the electrode platform by welding, riveting or bolting. The pole frame body, the electrode and the support structure are pre-assembled to form a module unit, which improves the assembly efficiency. There are also multiple small chamber flow channels arranged on the pole frame body, and each two flow channels are arranged at a certain angle, and the small chamber flow channels are arranged symmetrically with the line connecting the center of the flow channel opening to the center of the circle of the pole frame body. The angle between the two outermost flow channels of the small chamber flow channels corresponding to each flow channel opening is θ, 60°<θ<120°. The cathode alkali liquid inlet and the cathode gas-liquid outlet small chamber flow channels are arranged on the cathode surface, and the anode alkali liquid inlet and the anode gas-liquid outlet small chamber flow channels are arranged on the anode surface, so that the electrolytic cell forms an alkali liquid double circulation structure, improving the electrolysis efficiency and temperature control.

[0008] The utility model provides an electrolytic hydrogen production pole frame, specifically a flow field uniform electrolytic hydrogen production pole frame suitable for module assembly, which comprises a pole frame body 1, wherein the pole frame body 1 comprises a sealing surface 2, a flow channel surface 3, a diaphragm platform 4, an electrode platform 5 and a main pole plate mounting surface 6 arranged in a stepped manner;

[0009] The diaphragm platform 4 is used for placing and limiting the diaphragm 7;

[0010] The electrode platform 5 is used for assembling, fixing and limiting the electrode 8;

[0011] The main pole plate mounting surface 6 is used to mount the main pole plate 9;

[0012] A support structure 10 is disposed between the main pole plate 9 and the electrode 8 .

[0013] Preferably, the electrode 8, the support structure 10 and the pole frame body 1 can be preassembled into a module unit.

[0014] Preferably, the flow channel surface 3 is provided with a flow channel opening 31, and a small chamber flow channel 32 is distributed corresponding to the flow channel opening 31. The small chamber flow channel 32 can connect the flow channel opening 31 to the main electrode plate mounting surface 6 to enter the electrolysis chamber.

[0015] Preferably, the flow channel opening 31 may be provided in plurality, and the shape of the flow channel opening 31 includes a circular opening or an arc-shaped notch;

[0016] The arrangement of the flow channel surface 3 can reduce the contact area between the sealing surface 2 and the gasket 11, thereby improving the sealing performance of the electrolytic cell.

[0017] Preferably, the flow channel opening 31 includes a cathode alkali solution inlet 312, an anode alkali solution inlet 311, a cathode gas-liquid outlet 313, and an anode gas-liquid outlet 314;

[0018] The cathode alkali liquid inlet 312 and the cathode gas-liquid outlet 313 are arranged opposite to each other and form a certain angle α with the vertical line passing through the center of the circle; the anode alkali liquid inlet 311 and the anode gas-liquid outlet 314 are arranged opposite to each other and form a certain angle α with the vertical line passing through the center of the circle; wherein 10°<α<30°.

[0019] Preferably, the small chamber flow channel 32 of the cathode alkali solution inlet 312 and the cathode gas-liquid outlet 313 is arranged on the cathode side, and the small chamber flow channel 32 of the anode alkali solution inlet 311 and the anode gas-liquid outlet 314 is arranged on the cathode side.

[0020] Preferably, there are multiple chamber flow channels 32, each two flow channels are arranged at a certain angle, and the chamber flow channels 32 are symmetrically arranged along a line from the center of the flow channel opening 31 to the center of the pole frame body 1;

[0021] The included angle between the two outermost flow channels in the small chamber flow channel 32 corresponding to each of the flow channel openings 31 is θ, 60°<θ<120°.

[0022] Preferably, a tablet pressing groove 33 is provided at the chamber flow channel 32, and the tablet pressing groove 33 corresponds to the flow channel opening 31;

[0023] The pressing sheet groove 33 can be used to place a pressing sheet for diaphragm support and flow channel isolation at the position of the chamber flow channel 32.

[0024] Preferably, the flow channel surface 3 is provided with an assembly positioning hole 34, and the assembly positioning hole 34 is used for positioning during assembly of the electrolytic cell.

[0025] Preferably, the assembly form of the electrode 8 includes but is not limited to welding, bonding, riveting or bolt assembly;

[0026] The support structure 10 includes but is not limited to a nickel foam structure, a support mesh structure, a nickel wire mesh structure, and an elastic structure.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] 1. The utility model increases the assembly accuracy by adding a limiter to the electrode and the diaphragm on the pole frame. The electrode can be fixed on the electrode table by welding, bonding, riveting or bolting, and the assembly and fixing forms are various.

[0029] 2. The pole frame body, the electrode and the supporting structure of the pole frame for hydrogen production by electrolysis of the utility model can be pre-assembled to form a module unit. The modular assembly of the electrolyzer is formed by pre-assembly, which avoids a large number of assembly parts and improves the efficiency of electrolyzer assembly.

[0030] 3. In the hydrogen production electrode frame of the utility model, a plurality of small chamber flow channels are arranged on the main body of the electrode frame, and each two flow channels are arranged at a certain angle, and the small chamber flow channels are arranged symmetrically with the line connecting the center of the flow channel opening to the center of the circle of the electrode frame body, and the angle between the two outermost flow channels of the small chamber flow channels corresponding to each flow channel opening is θ, 60°<θ<120°. The cathode alkali liquid inlet and cathode gas-liquid outlet small chamber flow channels are arranged on the cathode surface, and the anode alkali liquid inlet and anode gas-liquid outlet small chamber flow channels are arranged on the anode surface, so that the electrolytic cell forms an alkali liquid double circulation structure, improving the electrolysis efficiency and temperature control. The utility model makes the fluid and temperature distribution in the electrolysis small chamber more uniform by changing the flow channel form of the electrode frame, which effectively reduces the energy consumption of the electrolytic cell.

[0031] 4. The arrangement of the flow channel surface 3 in the hydrogen production electrode frame of the utility model can reduce the contact area between the sealing surface 2 and the gasket, thereby improving the sealing performance of the electrolytic cell.

[0032] 5. The flow channel surface 3 in the hydrogen production electrode frame of the utility model is provided with the assembly positioning hole 34, and the assembly positioning hole 34 is used for positioning during assembly of the electrolytic cell to increase its assembly accuracy.

[0033] 6. The press plate groove 33 is provided at the small chamber flow channel 32 in the electrolytic hydrogen production electrode frame of the utility model. The press plate groove 33 corresponds to the flow channel opening 31. The press plate groove 33 can be used to place a press plate for diaphragm support and flow channel isolation at the position of the small chamber flow channel 32. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the pole frame of the utility model;

[0035] Figure 2 It is a schematic diagram of the pole frame flow channel of the utility model;

[0036] Figure 3 It is a schematic diagram of a pole frame assembly module unit of the utility model;

[0037] Figure 4 This is a schematic diagram of the electrolytic cell assembly of the utility model;

[0038] The names of the figure marks in the figure description are: 1. pole frame body; 2. sealing surface; 3. flow channel surface; 31. flow channel opening; 311. anode alkaline solution inlet; 312. cathode alkaline solution inlet; 313. cathode gas-liquid outlet; 314. anode gas-liquid outlet; 32. chamber flow channel; 33. pressing plate groove; 34. assembly positioning hole; 4. diaphragm platform; 5. electrode platform; 6. main pole plate mounting surface; 7. diaphragm; 8. electrode; 9. main pole plate; 10. supporting structure; 11. gasket. DETAILED DESCRIPTION

[0039] The utility model is further described in detail below in conjunction with the embodiments.

[0040] Those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific techniques or conditions are specified in the examples, the techniques or conditions described in the literature in the field or the product instructions are used. If the manufacturer of the materials or equipment used is not specified, they are all conventional products that can be purchased.

[0041] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" to another element, it may be directly connected to the other element, or there may be intermediate elements. In addition, the "connection" used here may include wireless connection.

[0042] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0044] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein, including technical terms and scientific terms, have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that those terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0045] Example

[0046] This embodiment is a flow field uniform electrolysis hydrogen production pole frame suitable for module assembly, which includes a pole frame body 1, wherein the pole frame body 1 includes a sealing surface 2, a flow channel surface 3, a diaphragm platform 4, an electrode platform 5 and a main pole plate mounting surface 6 arranged in a stepped manner;

[0047] The diaphragm platform 4 is used for placing and limiting the diaphragm 7;

[0048] The electrode platform 5 is used for assembling, fixing and limiting the electrode 8;

[0049] The main pole plate mounting surface 6 is used to mount the main pole plate 9;

[0050] A support structure 10 is disposed between the main pole plate 9 and the electrode 8 .

[0051] The electrode 8, the support structure 10 and the pole frame body 1 may be preassembled into a module unit.

[0052] The flow channel surface 3 is provided with a flow channel opening 31 , and a small chamber flow channel 32 is distributed corresponding to the flow channel opening 31 . The small chamber flow channel 32 can connect the flow channel opening 31 to the main electrode plate mounting surface 6 to enter the electrolysis chamber.

[0053] The flow channel openings 31 are provided with two, and the shape of the flow channel openings 31 is an arc-shaped slot;

[0054] The arrangement of the flow channel surface 3 can reduce the contact area between the sealing surface 2 and the gasket 11, thereby improving the sealing performance of the electrolytic cell.

[0055] The flow channel opening 31 includes a cathode alkali solution inlet 312, an anode alkali solution inlet 311, a cathode gas-liquid outlet 313, and an anode gas-liquid outlet 314;

[0056] The cathode alkali liquid inlet 312 and the cathode gas-liquid outlet 313 are arranged opposite to each other and form a certain angle α with the vertical line passing through the center of the circle; the anode alkali liquid inlet 311 and the anode gas-liquid outlet 314 are arranged opposite to each other and form a certain angle α with the vertical line passing through the center of the circle, wherein α is equal to 15°.

[0057] The small chamber flow channel 32 of the cathode alkali solution inlet 312 and the cathode gas-liquid outlet 313 is arranged on the cathode side, and the small chamber flow channel 32 of the anode alkali solution inlet 311 and the anode gas-liquid outlet 314 is arranged on the cathode side.

[0058] There are five small chamber flow channels 32, each two of which are arranged at a certain angle, and the small chamber flow channels 32 are symmetrically arranged along a line from the center of the flow channel opening 31 to the center of the pole frame body 1;

[0059] The included angle between the two outermost flow channels in the small chamber flow channel 32 corresponding to each flow channel opening 31 is θ, where θ is equal to 90°.

[0060] The chamber flow channel 32 is provided with a tablet pressing groove 33, and the tablet pressing groove 33 corresponds to the flow channel opening 31;

[0061] The pressing sheet groove 33 can be used to place a pressing sheet for diaphragm support and flow channel isolation at the position of the chamber flow channel 32.

[0062] The flow channel surface 3 is provided with an assembly positioning hole 34, and the assembly positioning hole 34 is used for positioning during assembly of the electrolytic cell.

[0063] The electrode 8 is assembled in a welding manner;

[0064] The support structure 10 is a support net structure.

[0065] A specific implementation form is that the pole frame body 1 is provided with the sealing surface 2, the flow channel 3, the diaphragm platform 4, the electrode platform 5 and the main pole plate mounting surface 6 arranged in a stepped form. The setting of the flow channel surface 3 can reduce the contact area between the sealing surface 2 and the gasket 11, and improve the sealing of the electrolytic cell. The diaphragm platform 4 can limit the diaphragm 7 by steps, and the electrode platform 5 can limit the electrode 8 by steps. At the same time, the electrode 8 can be fixed on the electrode platform 5 by welding, bonding, riveting or bolting, and the assembly accuracy can be improved by limiting. The main pole plate mounting surface 6 is provided with an opening that can cooperate with the main pole plate 9. The support structure 10 is arranged between the main pole plate 9 and the electrode 8, and the support structure 10 can be a support mesh structure. The pole frame body 1, the electrode 8 and the support structure 10 are pre-assembled to form a module unit. When the electrolytic cell is assembled as a whole, it can be positioned by placing a positioning rod in the positioning hole 33, and assembled by the module unit, the diaphragm, the gasket, etc., thereby reducing the number of assembly parts and improving the assembly efficiency.

[0066] The pole frame body 1 is provided with two flow passages 31, the cathode alkali liquid inlet 312 and the cathode gas-liquid outlet 313 are arranged opposite to each other and form an angle of 15° with the vertical line passing through the center of the circle, the anode alkali liquid inlet 311 and the anode gas-liquid outlet 314 are arranged opposite to each other and form an angle of 15° with the vertical line passing through the center of the circle, and the corresponding arrangement of the inlets and outlets can improve the uniformity of the alkali liquid, and there are the small chamber flow passages 32 connected between all the flow passages 3 and the main pole plate mounting surface 6. The small chamber flow passages 32 are arranged corresponding to the flow passages 31. The small chamber flow passages 32 of the cathode alkali liquid inlet 312 and the cathode gas-liquid outlet 313 are arranged on the cathode surface, and the small chamber flow passages 32 of the anode alkali liquid inlet 311 and the anode gas-liquid outlet 314 are arranged on the anode surface, and this arrangement enables the alkali liquids of the anode and cathode to circulate independently. There are five chamber flow channels 32 corresponding to each flow channel opening 31, and each two chamber flow channels 32 are arranged at a certain angle, and the chamber flow channels 32 are arranged symmetrically with the line connecting the center of the flow channel opening 31 to the center of the pole frame body 1. The angle between the two outermost flow channels in the chamber flow channels 32 corresponding to each flow channel opening 31 is θ, and θ is equal to 90°. The arrangement of the chamber flow channels 32 can divert the alkali solution of the cathode alkali solution inlet 312 and the alkali solution inlet 311, and the alkali solution is diffusely distributed when entering the electrolytic chamber, so that the alkali solution is more evenly distributed in the chamber. After passing through the chamber, the chamber flow channels 32 through the cathode gas-liquid outlet 313 and the anode gas-liquid outlet 314 converge into the cathode gas-liquid outlet 313 and the anode gas-liquid outlet 314. The outermost flow channels of the chamber flow channels 32 near the top of the electrolytic cell can be used to discharge the gas accumulated at the top of the electrolytic cell because the angle is larger. The small chamber flow channel 32 is also provided with a pressing plate groove 33, and the pressing plate groove 33 corresponds to the flow channel opening 31. By placing a pressing plate in the pressing plate groove 33, the diaphragm support and flow channel isolation at the position of the small chamber flow channel 32 can be achieved.

Claims

1. An electrolytic hydrogen production pole frame, characterized in that: It comprises a pole frame body (1), wherein the pole frame body (1) comprises a sealing surface (2), a flow channel surface (3), a diaphragm platform (4), an electrode platform (5) and a main pole plate mounting surface (6) arranged in a stepped manner; The diaphragm platform (4) is used for placing and limiting the position of the diaphragm (7); The electrode platform (5) is used for assembling, fixing and limiting the electrode (8); The main pole plate mounting surface (6) is used for mounting the main pole plate (9); A support structure (10) is provided between the main pole plate (9) and the electrode (8).

2. The hydrogen production electrode frame according to claim 1, characterized in that: The electrode (8), the support structure (10) and the pole frame body (1) can be preassembled into a module unit.

3. The hydrogen production electrode frame according to claim 1, characterized in that: The flow channel surface (3) is provided with a flow channel opening (31), and a small chamber flow channel (32) is distributed corresponding to the flow channel opening (31). The small chamber flow channel (32) can connect the flow channel opening (31) to the main electrode plate mounting surface (6) and enter the electrolysis chamber.

4. The hydrogen production electrode frame according to claim 3, characterized in that: The flow channel opening (31) may be provided in plurality, and the shape of the flow channel opening (31) includes a circular opening or an arc-shaped slot opening; The provision of the flow channel surface (3) can reduce the contact area between the sealing surface (2) and the gasket (11), thereby improving the sealing performance of the electrolytic cell.

5. The hydrogen production electrode frame by electrolysis according to claim 3, characterized in that: The flow channel opening (31) includes a cathode alkali solution inlet (312), an anode alkali solution inlet (311), a cathode gas-liquid outlet (313), and an anode gas-liquid outlet (314); The cathode alkali liquid inlet (312) and the cathode gas-liquid outlet (313) are arranged opposite to each other and form a certain angle α with a vertical line passing through the center of the circle; the anode alkali liquid inlet (311) and the anode gas-liquid outlet (314) are arranged opposite to each other and form a certain angle α with a vertical line passing through the center of the circle; wherein 10°<α<30°.

6. The hydrogen production electrode frame by electrolysis according to claim 5, characterized in that: The small chamber flow channel (32) of the cathode alkali solution inlet (312) and the cathode gas-liquid outlet (313) is arranged on the cathode side, and the small chamber flow channel (32) of the anode alkali solution inlet (311) and the anode gas-liquid outlet (314) is arranged on the cathode side.

7. The hydrogen production electrode frame by electrolysis according to claim 3, characterized in that: The chamber flow channels (32) are distributed in a plurality, and each two flow channels are arranged at a certain angle, and the chamber flow channels (32) are arranged symmetrically with respect to a line connecting the center of the flow channel opening (31) to the center of the pole frame body (1); The included angle between the two outermost flow channels in the small chamber flow channel (32) corresponding to each of the flow channel openings (31) is θ, 60°<θ<120°.

8. The hydrogen production electrode frame by electrolysis according to claim 3, characterized in that: A tablet pressing groove (33) is provided at the chamber flow channel (32), and the tablet pressing groove (33) corresponds to the flow channel opening (31); The pressing sheet groove (33) can be used to place a pressing sheet, which is used for diaphragm support and flow channel isolation at the position of the chamber flow channel (32).

9. The hydrogen production electrode frame by electrolysis according to claim 1, characterized in that: The flow channel surface (3) is provided with an assembly positioning hole (34), and the assembly positioning hole (34) is used for positioning during assembly of the electrolytic cell.

10. The hydrogen production electrode frame by electrolysis according to claim 1, characterized in that: The electrode (8) is assembled by welding, bonding, riveting or bolting; The support structure (10) comprises a nickel foam structure, a support mesh structure, a nickel wire mesh structure, and an elastic structure.

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