Multi-channel frame structure in electrolytic bath and hydrogen production system

Abstract

The utility model relates to the technical field of hydrogen production equipment, and discloses a multi-channel frame structure in an electrolytic bath and a hydrogen production system, the multi-channel frame structure in the electrolytic bath comprises a mounting pressure plate which is detachably arranged at an opening of an electrolytic bath main body to form a sealed cavity; the polar plate is detachably arranged in the sealing cavity, a plurality of anode chambers which are communicated with one another are formed in the sealing cavity, and a clamping groove is further formed in the polar plate; the water pipe is arranged in the sealing cavity through the clamping groove, and the exchange membrane is communicated with the anode chamber; a plurality of mutually communicated anode chambers are formed by dividing a sealing cavity by utilizing a limiting plate mounting pole plate, so that a diversion and cooling path is formed, and the current conduction and electrolyte flowing efficiency is optimized; through the gas circulating groove and the alkaline electrolyte circulating groove which are formed in the upper side and the lower side of the polar plate, uniform current conduction is achieved, local overheating is avoided, and the electrolysis efficiency is improved; the problems that an existing electrolytic cell is uneven in current conduction, low in electrolyte flowing efficiency and insufficient in gas separation and collection efficiency are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen production equipment, and particularly relates to a multi-channel frame structure in an electrolytic cell and a hydrogen production system. Background Art

[0002] In the electrolysis industry, the electrolytic cell is a key device for electrochemical reactions, and the design of its internal structure directly affects the electrolysis efficiency and product quality. In recent years, with the continuous development of electrolysis technology, the research on fluid dynamics and mass transfer processes in electrolytic cells has become more and more in-depth, and higher requirements have been put forward for the internal structure of electrolytic cells.

[0003] The traditional internal structure design of electrolytic cells often adopts a single flow channel structure. Although this design is simple and practical, there are problems such as uneven fluid distribution and uneven current density distribution during electrolysis, resulting in low electrolysis efficiency and unstable quality of electrolysis products. Especially for large-scale and high-current-density electrolysis processes, the limitations of the single flow channel structure are more obvious. To solve the above problems, some researchers have proposed a scheme of setting a multi-channel frame structure in the electrolytic cell. This structure improves the flow state of the electrolyte by setting multiple parallel or staggered flow channels inside the electrolytic cell, making the distribution of the electrolyte in the electrolytic cell more uniform, thereby improving the electrolysis efficiency and product quality. However, there are still some problems in the actual application of the existing multi-channel frame structure, such as:

[0004] 1. Uneven current conduction. In traditional single-channel or multi-channel designs, uneven current distribution may lead to a decrease in electrolysis efficiency, local overheating, and affect the stability of the equipment;

[0005] 2. Low electrolyte flow efficiency. The flow path and speed of the electrolyte in the electrolytic cell directly affect the electrolysis efficiency. In traditional designs, the flow path of the electrolyte is single, and the flow rate is difficult to control, resulting in low utilization efficiency of the electrolyte in the electrolyte;

[0006] 3. Insufficient gas separation and collection efficiency. The hydrogen and oxygen generated during electrolysis need to be effectively separated and collected. In traditional designs, the gas separation and collection efficiency is low, and gas mixing is likely to occur, affecting the purity.

[0007] Therefore, to solve the problems existing in the above-mentioned prior art, the utility model proposes a multi-channel frame structure in an electrolytic cell, aiming to improve the electrolysis efficiency of the electrolytic cell, improve the fluid dynamics state of the electrolyte, ensure the high-quality circulation of electrolysis products, and at the same time enhance the stability of the frame structure and the controllability of the electrolysis process. Summary of the Utility Model

[0008] (I) Technical Problems to be Solved

[0009] In view of the deficiencies of the prior art, the present utility model provides a multi-channel frame structure in an electrolytic cell and a hydrogen production system, which have the advantages of significantly improving the electrolysis efficiency, enhancing the equipment stability, and at the same time realizing the structural simplification and cost control, and solve the problems of the internal structure of the existing electrolytic cell in terms of current conduction, electrolyte flow, gas separation and collection, and structural simplification and cost control.

[0010] (II) Technical Solution

[0011] In order to achieve the above purposes of improving the electrolyte circulation efficiency, heat dissipation efficiency and quality of electrolysis products, the present utility model provides the following technical solutions:

[0012] The present utility model discloses the first technical solution: a multi-channel frame structure in an electrolytic cell, which is arranged in the main body of the electrolytic cell and includes:

[0013] An installation pressing plate, which is detachably arranged at the opening of the main body of the electrolytic cell, and a sealing cavity is formed between the main body of the electrolytic cell and the installation pressing plate;

[0014] A plate electrode, which is detachably arranged in the sealing cavity, and a plurality of mutually connected anode chambers are formed in the sealing cavity, and a clamping groove is also arranged on the plate electrode;

[0015] A water pipe, which is arranged in the sealing cavity through the clamping groove and is communicated with the anode chamber through an exchange membrane.

[0016] As a preferred embodiment of the present utility model, limiting plates arranged in equal columns are provided on the inner sides of the front and rear side walls of the main body of the electrolytic cell, and the limiting plates are matched with the plate electrode.

[0017] As a preferred embodiment of the present utility model, a gas flow groove is arranged on the upper side of the plate electrode, and each anode chamber is communicated through the gas flow groove, and an oxygen discharge pipe is also arranged on the installation pressing plate and is communicated with the upper end of the sealing cavity.

[0018] As a preferred embodiment of the present utility model, an alkaline electrolyte flow groove is arranged on the lower side of the plate electrode, and each anode chamber is communicated through the alkaline electrolyte flow groove.

[0019] As a preferred embodiment of the present utility model, the water pipe is horizontally arranged in the sealing cavity through the clamping groove, and a hydrogen discharge pipe and a plurality of exchange holes are arranged on the water pipe, and the hydrogen discharge pipe extends to the outside of the installation pressing plate.

[0020] As a preferred embodiment of the present utility model, an alkaline electrolyte inlet and an alkaline electrolyte outlet pipe communicated with the sealing cavity are also arranged on the main body of the electrolytic cell.

[0021] As a preferred embodiment of the present utility model, water inlets and water outlets are respectively arranged at both ends of the water pipe.

[0022] The second technical solution disclosed by the present utility model is: a hydrogen production system, including an electrolytic cell main body, and a multi-channel frame structure inside the electrolytic cell arranged in the electrolytic cell main body.

[0023] As a preferred embodiment of the present utility model, it further includes an alkaline electrolyte replenishment system, an alkaline electrolyte recovery system, an oxygen recovery system, a hydrogen recovery system, a water supply system and a water recovery system. The alkaline electrolyte replenishment system, the alkaline electrolyte recovery system, the oxygen recovery system and the hydrogen recovery system are all connected to the electrolytic cell main body; the water supply system and the water recovery system are both connected to the water pipe.

[0024] (III) Beneficial effects

[0025] Compared with the prior art, the present utility model provides a multi-channel frame structure inside an electrolytic cell and a hydrogen production system, having the following beneficial effects:

[0026] 1. Inside the electrolytic cell main body, a sealing cavity is formed by installing a pressing plate and the electrolytic cell main body for introducing the electrolyte. The electrode plates are installed through the limiting plates, and the sealing cavity is divided into multiple interconnected anode chambers. The electrode plates are provided with card slots for installing water pipes to form a flow guiding and cooling path, improving the distribution and flow efficiency of the electrolyte.

[0027] 2. By providing a gas flow channel on the upper side of the electrode plate and an alkaline electrolyte flow channel on the lower side, the anode chambers are connected through these two flow channels to achieve uniform conduction of the current, avoid local overheating, and improve the electrolysis efficiency; at the same time, by connecting the oxygen discharge pipe to the upper end of the sealing cavity, the effective separation and collection of hydrogen and oxygen generated during the electrolysis process are ensured, avoiding gas mixing and improving the gas purity.

[0028] 3. Through the optimized design of the multi-channel frame structure, the use of complex connecting parts is reduced, the manufacturing process is simplified, the equipment cost and maintenance difficulty are reduced; the purposes of improving the electrolyte flow efficiency, heat dissipation efficiency and electrolysis product quality are achieved. Description of the drawings

[0029] Figure 1 It is a schematic structural diagram of the multi-channel frame structure inside the electrolytic cell of the present utility model;

[0030] Figure 2 It is a cross-sectional view of the multi-channel frame structure inside the electrolytic cell of the present utility model;

[0031] Figure 3 It is a schematic structural diagram of the electrolytic cell main body from the cross-sectional view angle after the electrode plates are installed of the present utility model;

[0032] Figure 4 It is a schematic structural diagram of the electrolytic cell main body from the cross-sectional view angle before the electrode plates are installed of the present utility model;

[0033] Figure 5 This is a schematic structural diagram of the water pipe of the present utility model;

[0034] Figure 6 This is a schematic structural diagram of the water pipe of the present utility model from a sectional view angle;

[0035] Figure 7 This is a schematic structural diagram of the hydrogen production system of the present utility model.

[0036] In the figure: 1. Electrolyzer main body; 11. Sealing cavity; 12. Limiting plate; 13. Anode chamber; 2. Installation pressing plate; 3. Oxygen discharge pipe; 4. Hydrogen discharge pipe; 5. Alkaline electrolyte inlet pipe; 6. Alkaline electrolyte outlet pipe, 7. Water inlet; 8. Water outlet; 9. Water pipe; 91. Exchange membrane; 10. Electrode plate, 101. Gas flow groove; 102. Alkaline electrolyte flow groove; 103. Card slot. Detailed implementation manners

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0038] Embodiment 1: Please refer to Figures 1-6 , this embodiment provides a technical solution:

[0039] A multi-channel frame structure inside the electrolyzer is arranged inside the electrolyzer main body 1 and includes an installation pressing plate 2, a water pipe 9 and an electrode plate 10; wherein

[0040] The installation pressing plate 2 is detachably installed at the upper opening of the electrolyzer main body 1, and a sealing cavity 11 for introducing electrolyte is formed between the electrolyzer main body 1 and the installation pressing plate 2;

[0041] The electrode plate 10 is detachably installed inside the sealing cavity 11. The sealing cavity 11 is divided into several mutually connected anode chambers 13 by the electrode plate 10, and card slots 103 are provided on the electrode plate 10;

[0042] The water pipe 9 is installed inside the sealing cavity 11 through the card slot 103 and is communicated with the anode chamber 13 through the exchange membrane 91 for electrolyzing water reaction when electrified;

[0043] In this embodiment, a sealing cavity 11 for introducing electrolyte is formed by installing the pressing plate 2, which facilitates the uniform distribution and sealing of the electrolyte, and reduces the evaporation loss of the electrolyte; the sealing cavity 11 is divided into several interconnected anode chambers 13 by a plurality of electrode plates 10, and water pipes 9 are fixed to the electrode plates 10 through the card slots 103 on the electrode plates 10, ensuring the uniform distribution of the electrolyte in each anode chamber 13 and improving the electrolysis efficiency at the same time; the water pipes 9 are installed in the sealing cavity 11 through the card slots 103 and communicate with the anode chambers 13 through the exchange membranes 91, and are used for efficient electrolytic water reaction when electrified. The use of the exchange membranes 91 not only improves the selectivity of the electrolysis reaction, but also reduces the energy consumption.

[0044] As a preferred embodiment, as Figure 4 shown, limiting plates 12 arranged in equal columns are provided on the inner sides of the front and rear side walls of the electrolytic cell main body 1, and the limiting plates 12 are used in cooperation with the electrode plates 10;

[0045] In this embodiment, the electrode plates 10 are installed through the limiting plates 12, and the sealing cavity 11 is divided into a plurality of interconnected anode chambers 13, forming a stable flow guiding and cooling path, and improving the distribution and flow efficiency of the electrolyte.

[0046] As a preferred embodiment, as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, a gas flow channel 101 is provided on the upper side of the electrode plate 10, and each anode chamber 13 in the sealing cavity 11 is communicated through the gas flow channel 101, and an oxygen discharge pipe 3 is further provided on the installation pressing plate 2 and communicated with the upper end of the sealing cavity 11;

[0047] In this embodiment, through the arrangement of the gas flow channel 101, the gas generated during the electrolysis process can be collected and guided, ensuring that the gas can be discharged smoothly, while avoiding the accumulation of gas in the sealing cavity 11, preventing possible pressure increase and safety hazards; and ensuring the effective separation and collection of hydrogen and oxygen generated during the electrolysis process, avoiding gas mixing and improving the gas purity.

[0048] As a preferred embodiment, as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, an alkaline electrolyte flow channel 102 is provided on the lower side of the electrode plate 10, and each anode chamber 13 in the sealing cavity 11 is communicated through the alkaline electrolyte flow channel 102. During use, the electrolyte in each anode chamber 13 can ensure the uniform flow of the electrolyte in the anode chamber, ensuring the electrolysis efficiency.

[0049] As a preferred embodiment, as Figure 6 andFigure 7 As shown, the water pipe 9 is horizontally arranged in the sealing cavity 11 through the card slot 103, and a hydrogen discharge pipe 4 and a number of exchange holes 92 are arranged on the water pipe 9;

[0050] In this embodiment, through the exchange holes 92, sodium ions can move into the water pipe 9 through the exchange membrane 91, so that water can be electrolyzed to generate hydrogen and hydroxide ions under the action of electrolysis; hydrogen escapes from the solution through the hydrogen discharge pipe 4.

[0051] As a preferred embodiment, as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, an alkaline electrolyte inlet pipe 5 and an alkaline electrolyte outlet pipe 6 communicating with the sealing cavity 11 are further arranged on the electrolytic cell main body 1. The two ends of the alkaline electrolyte inlet pipe 5 and the alkaline electrolyte outlet pipe 6 extend to the outside of the electrolytic cell main body 1 and are connected to the electrolyte supply pipeline, and the alkaline electrolyte inlet pipe 5 is arranged at the upper end of the sealing cavity 11, and the alkaline electrolyte outlet pipe 6 is arranged at the lower end of the sealing cavity 11.

[0052] In this embodiment, alkaline electrolyte is input into the sealing cavity 11 through the alkaline electrolyte inlet pipe 5 so that it can be evenly distributed in the sealing cavity 11. At the same time, the electrolyte with increased concentration after electrolysis can be selectively discharged through the alkaline electrolyte outlet pipe 6 to reduce the erosion of the high-concentration alkaline electrolyte on the hydrogen production system.

[0053] As a preferred embodiment, as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 As shown, water inlets 7 and water outlets 8 are respectively arranged at both ends of the water pipe 9; water is supplied into the water pipe 9 through the water inlets 7 to realize the electrolysis reaction.

[0054] As a preferred embodiment, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the electrolytic cell main body 1 is made of corrosion-resistant materials, such as stainless steel or polytetrafluoroethylene, to adapt to the chemical properties of the electrolyte.

[0055] As a preferred embodiment, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 As shown, the material of the electrode plate 10 is a material with good electrical conductivity, such as titanium or nickel.

[0056] As a preferred embodiment, as Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 shown, the water pipe 9 can be a copper conduit, which is used to cool the heat generated during the electrolysis process and keep the temperature of the electrolytic cell stable.

[0057] The multi-channel frame structure in the electrolytic cell of this embodiment: A sealing cavity is formed by installing a pressing plate in the main body of the electrolytic cell and the main body of the electrolytic cell. The limiting plate is used to install the electrode plates to divide the sealing cavity into multiple interconnected anode chambers. Card slots are provided on the electrode plates to install water pipes to form a diversion and cooling path, optimizing the current conduction and the flow efficiency of the electrolyte. At the same time, the gas circulation grooves and alkaline electrolyte circulation grooves provided on the upper and lower sides of the electrode plates achieve uniform current conduction, avoid local overheating, and improve the electrolysis efficiency. The oxygen discharge pipe installed on the pressing plate ensures the effective separation and collection of hydrogen and oxygen, improving the gas purity. Through structural simplification and cost control, the present invention reduces the use of complex connectors, reduces the equipment cost and maintenance difficulty, and has high electrolysis efficiency, gas separation and collection efficiency and good market competitiveness.

[0058] Embodiment 2: As shown in the attached Figure 7 of the specification, this embodiment provides a technical solution:

[0059] A hydrogen production system includes the electrolytic cell main body 1 as described in Embodiment 1, and a multi-channel frame structure in the electrolytic cell provided in the electrolytic cell main body 1, and also includes an alkaline electrolyte supply system, an alkaline electrolyte recovery system, an oxygen recovery system, a hydrogen recovery system, a water supply system and a water recovery system; wherein

[0060] The alkaline electrolyte supply system is connected to the electrolytic cell main body 1 through an electrolyte inlet pipe 5 to supply electrolyte to the sealing cavity 11;

[0061] The alkaline electrolyte recovery system is connected to the electrolytic cell main body 1 through an alkaline electrolyte outlet pipe 6 to discharge the high-concentration alkaline electrolyte;

[0062] The oxygen recovery system is connected to the oxygen discharge pipe 3 for collecting oxygen;

[0063] The hydrogen recovery system is connected to the hydrogen discharge pipe 4 for collecting hydrogen;

[0064] The water supply system is connected to the water inlet 7 for supplying water to the water pipe 9;

[0065] The water recovery system is connected to the water outlet 8 for recovering the water that has not been completely electrolyzed.

[0066] In the hydrogen production system described in this embodiment: By installing a pressing plate inside the electrolytic cell body to form a sealed cavity with the electrolytic cell body, using a limiting plate to install electrode plates to divide the sealed cavity into multiple interconnected anode chambers, water pipes are installed on the electrode plates through card slots to form a flow guiding and cooling path, optimizing the current conduction and the flow efficiency of the electrolyte. At the same time, the gas flow grooves and alkaline electrolyte flow grooves provided on the upper and lower sides of the electrode plates achieve uniform current conduction, avoid local overheating, and improve the electrolysis efficiency. The oxygen discharge pipe installed on the pressing plate ensures the effective separation and collection of hydrogen and oxygen, improving the gas purity. Through structural simplification and cost control, the present invention reduces the use of complex connecting parts, reduces the equipment cost and maintenance difficulty, and has high electrolysis efficiency, gas separation and collection efficiency, and good market competitiveness.

[0067] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0068] Although the embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A multi-channel frame structure in an electrolytic cell, arranged in an electrolytic cell body (1), characterized in that: include: A mounting plate (2) is detachably arranged at the opening of the electrolytic cell body (1), and a sealed cavity (11) is formed between the electrolytic cell body (1) and the mounting plate (2); A pole plate (10) is detachably arranged in a sealed cavity (11), a plurality of mutually connected anode chambers (13) are formed in the sealed cavity (11), and a clamping groove (103) is also arranged on the pole plate (10); The water pipe (9) is arranged in the sealed chamber (11) through the slot (103) and is connected to the anode chamber (13) through the exchange membrane (91).

2. The multi-channel frame structure in an electrolytic cell according to claim 1, characterized in that: The inner sides of the front and rear side walls of the electrolytic cell body (1) are both provided with limiting plates (12) distributed in equal rows, and the limiting plates (12) match the electrode plates (10).

3. The multi-channel frame structure in an electrolytic cell according to claim 1, characterized in that: A gas flow groove (101) is provided on the upper side of the electrode plate (10), and each anode chamber (13) is connected through the gas flow groove (101). An oxygen exhaust pipe (3) is also provided on the mounting plate (2) and is connected to the upper end of the sealed cavity (11).

4. The multi-channel frame structure in an electrolytic cell according to claim 1, characterized in that: An alkaline electrolyte flow channel (102) is provided on the lower side of the electrode plate (10), and each anode chamber (13) is connected through the alkaline electrolyte flow channel (102).

5. The multi-channel frame structure in an electrolytic cell according to claim 1, characterized in that: The water pipe (9) is horizontally arranged in the sealed cavity (11) through a clamping groove (103), and a hydrogen exhaust pipeline (4) and a plurality of exchange holes (92) are arranged on the water pipe (9), and the hydrogen exhaust pipeline (4) extends to the outside of the mounting plate (2).

6. The multi-channel frame structure in an electrolytic cell according to claim 1, characterized in that: The electrolytic cell body (1) is also provided with an alkaline electrolyte inlet (5) and an alkaline electrolyte outlet pipe (6) which are connected to the sealed cavity (11).

7. The multi-channel frame structure in an electrolytic cell according to claim 1, characterized in that: The two ends of the water pipe (9) are respectively provided with a water inlet (7) and a water outlet (8).

8. A hydrogen production system, characterized in that: It comprises the electrolytic cell body (1) as claimed in claim 1, and an electrolytic cell multi-channel frame structure arranged in the electrolytic cell body (1).

9. A hydrogen production system according to claim 8, characterized in that: It also includes an alkaline electrolyte replenishing system, an alkaline electrolyte recovery system, an oxygen recovery system, a hydrogen recovery system, a water supply system and a water recovery system. The alkaline electrolyte replenishing system, the alkaline electrolyte recovery system, the oxygen recovery system and the hydrogen recovery system are all connected to the electrolytic cell body (1); the water supply system and the water recovery system are both connected to the water pipe (9).

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