Alkaline electrolytic bath with replaceable polar plates

Abstract

The utility model provides an alkaline electrolytic bath with replaceable polar plates. The alkaline electrolytic bath comprises a plurality of small electrolytic chambers, the small electrolysis chamber comprises a cathode plate frame, a cathode plate assembly, a diaphragm, an anode plate assembly and an anode plate frame; and the cathode plate frame is connected with the anode plate frame in a concave-convex matching manner. According to the utility model, the structural design is reasonable, through the modularized electrolysis cells, the equipment installation space is saved, the influence of the external environment on the electrolysis process is also reduced, the stability and efficiency of the system are improved, and the device can be easily expanded by connecting a plurality of electrolysis cells in parallel or in series when the yield needs to be increased. In the single electrolysis chamber, on one hand, the polar plate assembly and the diaphragm can be conveniently matched, positioned and installed through the design of the concave cavity and the boss, on the other hand, the cathode and the anode can be conveniently and rapidly distinguished, maintenance personnel can conveniently carry out maintenance and replacement operation after distinguishing the cathode and the anode, the maintenance efficiency is further improved, and the maintenance cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of alkaline electrolytic cells, in particular to an alkaline electrolytic cell with replaceable polar plates. Background Art

[0002] Alkaline electrolyzers play a key role in the production of hydrogen and oxygen, especially in the application of renewable energy technology and industrial chemical processes. Despite the technical maturity and economic advantages of alkaline electrolyzers, traditional electrolyzers still face many challenges in operation and maintenance. These challenges are mainly manifested in the high system maintenance cost, complex equipment structure and long downtime required for maintenance, all of which significantly affect the production efficiency and economic benefits of the equipment.

[0003] The high maintenance costs are mainly due to the wear and aging of the components in the equipment, which requires the entire system to be disassembled to replace or maintain a certain module to ensure the normal operation of the equipment. The complexity of the structure makes daily maintenance and troubleshooting more difficult, which not only increases the requirements for operator skills, but also prolongs the maintenance time of the system. In addition, long downtime is not good for any production facility because it directly affects the continuity of production and the profitability of the enterprise.

[0004] To address these issues, the industry is exploring more efficient electrolyzer design and maintenance strategies to improve equipment reliability and reduce operating costs. Utility Model Content

[0005] The technical problem to be solved by the utility model is: in order to overcome the problems of high system maintenance cost, complex equipment structure and long downtime required for maintenance in the prior art, the utility model provides an alkaline electrolytic cell with replaceable plates, which can effectively decompose the electrolytic cell into several independent small modular structures, which can be disassembled and maintained separately, effectively saving time and cost.

[0006] The utility model adopts the following technical scheme to solve the technical problems: an alkaline electrolytic cell with replaceable plates, comprising a plurality of electrolytic chambers; the electrolytic chambers comprise a cathode plate frame, a cathode plate assembly, a diaphragm, an anode plate assembly and an anode plate frame; the cathode plate frame and the anode plate frame are connected in a concave-convex manner, the matching end of the cathode plate frame is inwardly concave with a secondary step-shaped cavity, the secondary step-shaped cavity is an inner cavity and an intermediate cavity connected in sequence, the end face of one side of the diaphragm is sealedly connected with the connecting end face between the inner cavity and the intermediate cavity, the matching end of the anode plate frame is outwardly convex with a matching boss, the end face of the matching boss is sealedly connected with the end face of the other side of the diaphragm, the end face of the matching boss is synchronously concave with a boss cavity corresponding to the position of the inner cavity; the cathode plate assembly is arranged in the inner cavity, and the anode plate assembly is arranged in the boss cavity.

[0007] In the above solution, compared with the problem that the electrode plates and diaphragms in the original large electrolytic cell are easily damaged, the overall replacement cost is high, and the maintenance working hours are long, the original large electrolytic cell is divided into several small electrolytic chambers, which allows operators to replace or maintain specific small electrolytic chambers without disassembling the entire system, greatly simplifying the maintenance process. When a certain small electrolytic chamber fails, only this small electrolytic chamber needs to be repaired, reducing the workload of the operators and the system downtime, and effectively reducing the total maintenance cost. At the same time, in the small electrolytic chamber, through the electrode plate frame arranged by concave-convex cooperation, on the one hand, the cooperation and positioning installation of the electrode plate assembly and the diaphragm can be facilitated through the design of the concave cavity and the convex platform, and on the other hand, the cathode and anode can be conveniently and quickly distinguished, which is beneficial for the maintenance personnel to distinguish the cathode and anode and then carry out maintenance and replacement operations. In the installation of the electrode plate assembly, using the concave cavity as the placement position of the electrode plate assembly, compared with the traditional assembly, the electrode plate assembly can be directly placed into the concave cavity, which can effectively simplify the assembly and alignment operation during installation, further improving the maintenance efficiency and reducing the disassembly and assembly maintenance working hours.

[0008] Furthermore, the electrolytic cell is composed of several small electrolytic chambers connected in series or in parallel, which is convenient for expanding the electrolytic cell according to the production requirement.

[0009] Furthermore, a liquid inlet and a liquid outlet are respectively opened on the cathode electrode plate frame.

[0010] Even further, corresponding to the directions where the liquid inlet and the liquid outlet are located, flow channel holes are respectively opened on the side walls of the inner concave cavity and the middle concave cavity of the cathode electrode plate frame, and the flow channel holes are connected to penetrate the liquid inlet, the inner concave cavity and the liquid outlet; the flow channel holes are synchronously opened at the positions of the flow channel holes on the side wall of the middle concave cavity corresponding to the mating convex platform of the anode electrode plate frame, and the flow channel holes are connected to penetrate the liquid inlet, the convex platform concave cavity and the liquid outlet.

[0011] Furthermore, in the design of the electrode plate assembly, the cathode electrode plate assembly includes a cathode electrode plate and a cathode electrode grid which are fixedly connected. A plurality of mesh holes are spaced on the cathode electrode grid. The end face of the cathode electrode plate corresponding to the connection with the cathode electrode grid protrudes outward with a plurality of papillary support protrusions. The outer end face of the papillary support protrusion is supported and connected with one side end face of the cathode electrode grid, and the other side end face of the cathode electrode grid is close to the diaphragm. The papillary support protrusion can effectively support the electrode grid on the one hand and form a flow channel for the electrolytic solution to pass through inside the electrode plate assembly on the other hand.

[0012] Correspondingly, the anode electrode plate assembly includes an anode electrode plate and an anode electrode grid which are fixedly connected. A plurality of mesh holes are spaced on the anode electrode grid. The end face of the anode electrode plate corresponding to the connection with the anode electrode grid protrudes outward with a plurality of papillary support protrusions. The outer end face of the papillary support protrusion is supported and connected with one side end face of the anode electrode grid, and the other side end face of the anode electrode grid is close to the diaphragm.

[0013] Furthermore, the electrolysis chambers are each provided with a gasket corresponding to the cathode plate assembly and the anode plate assembly. The gasket is in a frame structure surrounding the plate assembly. The gasket corresponding to the cathode plate assembly is hermetically arranged between the connection end face between the inner concave cavity and the middle concave cavity and the diaphragm, and the gasket corresponding to the anode plate assembly is hermetically arranged between the diaphragm and the mating boss end face, thereby completing the hermetic connection between the diaphragm and the plate frame on the corresponding side by means of the gasket.

[0014] The beneficial effects of the present utility model are as follows: The alkaline electrolytic cell with replaceable plates provided by the present utility model has a reasonable structural design. The components required for the electrolytic cell are integrated in a semi-closed unit, saving the equipment installation space, reducing the influence of the external environment on the electrolysis process, improving the stability and efficiency of the system, maintaining the modular characteristics between each plate, and facilitating easy expansion by connecting multiple electrolysis chambers in parallel or in series when the production needs to be increased. At the same time, the design takes into account the convenience of maintaining each electrolysis chamber. Wear parts such as electrodes and diaphragms are easy to replace, reducing the maintenance time and cost. In a single electrolysis chamber, the cathode plate frame and the anode plate frame are in concave-convex fit. On the one hand, the design of the concave cavity and the convex platform facilitates the positioning and installation of the plate assembly and the diaphragm. On the other hand, it can also conveniently and quickly distinguish the cathode and the anode, which is beneficial for maintenance personnel to distinguish between the cathode and the anode and then perform maintenance and replacement operations, further improving the maintenance efficiency and saving the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0016] Figure 1 is a schematic structural diagram of the optimal embodiment of the present utility model.

[0017] Figure 2 is a schematic structural diagram of the cathode plate frame in the optimal embodiment of the present utility model.

[0018] Figure 3 is a schematic structural diagram of the plate and the electrode grid in the optimal embodiment of the present utility model.

[0019] Figure 4 is a schematic structural diagram of the anode plate frame in the optimal embodiment of the present utility model.

[0020] In the figure: 1. Cathode plate frame; 1-1. Liquid inlet; 1-2. Liquid outlet; 1-3. Inner concave cavity; 1-4. Middle concave cavity; 2. Gasket; 3. Cathode plate assembly; 4. Diaphragm; 5. Anode plate assembly; 6. Anode plate frame; 6-1. Mating boss; 6-2. Boss concave cavity; 7-1. Cathode flow channel hole; 7-2. Anode flow channel hole; 8. Papillary support protrusion; 9. Electrode grid; 10. Plate. Detailed Embodiment

[0021] The present utility model will now be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner. Therefore, they only show the components related to the present utility model, and directions and references (such as up, down, left, right, etc.) can only be used to assist in the description of the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the claimed subject matter is only defined by the appended claims and their equivalent forms.

[0022] As Figures 1 to 4 shown, a replaceable plate alkaline electrolyzer is the optimal embodiment of the present utility model. The electrolyzer includes a number of electrolysis chambers connected in series or in parallel. Considering the problem that the separator and plates in a large electrolyzer need to be replaced as a whole when damaged, the electrolyzer provided in this embodiment integrates the various components of the electrolyzer, such as electrodes, separators, electrolyte circulation systems, and control systems, in a semi-closed unit, that is, the electrolysis chamber. This not only saves the equipment installation space but also reduces the influence of the external environment on the electrolysis process, improving the stability and efficiency of the system. Each electrolysis chamber maintains a modular characteristic, facilitating easy expansion by connecting multiple chambers in parallel or in series when increasing production. At the same time, the design also takes into account the convenience of maintenance. When vulnerable parts such as electrodes and diaphragms 4 are damaged, only the corresponding parts in the corresponding electrolysis chamber need to be disassembled and replaced, and the maintenance process is convenient and fast, effectively reducing the maintenance time and cost.

[0023] Specifically, as Figure 1 shown, each electrolysis chamber includes a cathode plate frame 1, a cathode plate assembly 3, a diaphragm 4, an anode plate assembly 5, and an anode plate frame 6 from left to right. Sealing gaskets 2 are respectively provided between the cathode plate frame 1 and the diaphragm 4, and between the diaphragm 4 and the anode plate frame 6.

[0024] The cathode plate frame 1 and the anode plate frame 6 are connected by a concave and convex fit through the design of a concave cavity and a convex platform. After the fit connection, the four corner vertices are locked and fixed by bolts. Specifically, the mating end of the cathode plate frame 1 is concave with a two-stage stepped concave cavity, and the two-stage stepped concave cavity is an inner concave cavity 1-3 and an intermediate concave cavity 1-4 connected in sequence. One end face of the diaphragm 4 is hermetically connected to the connection end face between the inner concave cavity 1-3 and the intermediate concave cavity 1-4 through the sealing gasket 2. The mating end of the anode plate frame 6 is convex with a mating convex platform 6-1, and the end face of the mating convex platform 6-1 is hermetically connected to the other end face of the diaphragm 4 through the sealing gasket 2. A convex platform concave cavity 6-2 is synchronously concave at the position corresponding to the inner concave cavity 1-3 on the end face of the mating convex platform 6-1.

[0025] In the sealed connection between the separator 4 and the corresponding plate frame, the sealing operation is mainly achieved through the gasket 2. The gasket 2 is also designed corresponding to the outer shape of the plate assembly. In this embodiment, it is a frame-shaped structure arranged around the plate assembly. The gasket 2 corresponding to the cathode plate assembly 3 is sealed between the connection end face between the inner concave cavity 1-3 and the middle concave cavity 1-4 and the separator 4, and the gasket 2 corresponding to the anode plate assembly 5 is sealed between the separator 4 and the end face of the mating boss 6-1, thus completing the sealed connection between the separator 4 and the corresponding side plate frame by using the gasket 2.

[0026] In the actual selection and design, the outer shapes of the inner concave cavity 1-3 and the boss concave cavity 6-2 are the same as the outer shape of the plate assembly. The plate assembly is a rectangular body structure, and the cavities of the inner concave cavity 1-3 and the boss concave cavity 6-2 are also rectangular body structures. The cathode plate assembly 3 is arranged in the inner concave cavity 1-3, and the anode plate assembly 5 is arranged in the boss concave cavity 6-2.

[0027] In the design of the plate assembly, as Figure 3 shown, the cathode plate assembly 3 and the anode plate assembly 5 can adopt the same modular structure design.

[0028] The cathode plate assembly 3 includes a cathode plate and a cathode grid fixedly connected. A number of meshes are spaced apart on the cathode grid. The connection end face of the cathode plate corresponding to the cathode grid protrudes outward with a number of nipple support protrusions 8. The outer end face of the nipple support protrusion 8 is supported and connected to one side end face of the cathode grid, and the other side end face of the cathode grid is arranged close to the separator 4. On the one hand, the nipple support protrusion 8 can effectively support the grid, and on the other hand, it forms a flow channel for the electrolyte to pass through inside the plate assembly.

[0029] The anode plate assembly 5 includes an anode plate and an anode grid fixedly connected. A number of meshes are spaced apart on the anode grid. The connection end face of the anode plate corresponding to the anode grid protrudes outward with a number of nipple support protrusions 8. The outer end face of the nipple support protrusion 8 is supported and connected to one side end face of the anode grid, and the other side end face of the anode grid is arranged close to the separator 4.

[0030] In the design of the electrolytic cell, in order to ensure that the electrolyte circulation system can effectively flow in the cell, the cathode plate frame 1 is respectively provided with a liquid inlet 1-1 and a liquid outlet 1-2. Corresponding to the directions where the liquid inlet 1-1 and the liquid outlet 1-2 are located, flow channel holes are respectively opened on the side walls of the inner concave cavity 1-3 and the middle concave cavity 1-4. The flow channel holes are connected and penetrate through the liquid inlet 1-1, the inner concave cavity 1-3 and the liquid outlet 1-2; the mating boss 6-1 of the anode plate frame 6 is synchronously provided with a flow channel hole corresponding to the position of the flow channel hole on the side wall of the middle concave cavity 1-4. The flow channel hole is connected and penetrates through the liquid inlet 1-1, the boss concave cavity 6-2 and the liquid outlet 1-2. Corresponding Figure 3 and Figure 4, the flow channel holes on the concave cavity 1-3 of the cathode plate frame 1 are the cathode flow channel holes -1, and the flow channel holes on the middle concave cavity 1-4 of the cathode plate frame 1 and the mating boss 6-1 of the anode plate frame 6 are the anode flow channel holes -2.

[0031] In this way, when the electrolytic cell needs to be expanded, the liquid inlets 1-1 and outlets 1-2 of each electrolytic chamber can be connected according to the requirements of connected circulation to form multiple electrolytic chambers in series or in parallel, and then the electrolytic cell with the corresponding output can be connected and expanded as needed. Each electrolytic chamber maintains modular characteristics, is easy to expand, convenient to maintain, and is conducive to improving the equipment assembly efficiency for increasing or decreasing production, and further realizes the purpose of reducing the maintenance time and maintenance cost.

[0032] For a replaceable plate alkaline electrolytic cell designed in this way, compared with the problems existing in the original large electrolytic cell, such as the plates and the diaphragm 4 being easily damaged, the overall replacement cost being high, and the maintenance working hours being long, the original large electrolytic cell is divided into several electrolytic chambers with modular design, allowing operators to replace or maintain specific electrolytic chambers without disassembling the whole system, greatly simplifying the maintenance process. When a certain electrolytic chamber fails, only this electrolytic chamber needs to be repaired, without the need to replace all the plates and the diaphragm 4 as a whole, reducing the equipment input cost, reducing the workload of the operator and the system downtime, and effectively reducing the total maintenance cost.

[0033] In each separate electrolytic chamber, the concave and convex fits are set through the concave cavity and the boss. On the one hand, the design of the concave cavity and the boss can facilitate the positioning and installation of the plate assembly and the diaphragm 4. On the other hand, it can also conveniently and quickly distinguish the cathode and the anode. The actual outer shapes of the two side frames are different and are easy to distinguish. The one with a two-stage stepped concave cavity is the cathode, and the one with the mating boss 6-1 is the anode, which is conducive to maintenance personnel to distinguish the cathode and the anode and then perform corresponding maintenance and replacement operations, effectively simplifying the operation of distinguishing the cathode and the anode.

[0034] During the installation of the plate assembly, the concave cavity is used as the placement position of the plate assembly. The cathode plate frame 1 and the anode plate frame 6 can be effectively aligned and installed. The alignment process is convenient and fast. At the same time, the installation of the plate assembly and the corresponding concave cavity is also simpler, effectively simplifying the alignment process during assembly. Compared with the traditional components, the plate assembly provided in this embodiment can be directly placed into the concave cavity, which can effectively simplify the assembly alignment operation during installation, further improving the maintenance efficiency and reducing the disassembly and assembly maintenance working hours.

[0035] Inspired by the above-described ideal embodiments of the present utility model, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present utility model. The technical scope of the present utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An alkaline electrolytic cell with replaceable plates, characterized in that: It includes a number of electrolysis chambers; The electrolysis chamber comprises a cathode plate frame (1), a cathode plate assembly (3), a diaphragm (4), an anode plate assembly (5) and an anode plate frame (6); The cathode plate frame (1) and the anode plate frame (6) are connected in a concave-convex manner. The matching end of the cathode plate frame (1) is concave with a two-level step-shaped cavity, and the two-level step-shaped cavity is an inner cavity (1-3) and an intermediate cavity (1-4) connected in sequence. The end face of one side of the diaphragm (4) is sealed with the connecting end face between the inner cavity (1-3) and the intermediate cavity (1-4). The matching end of the anode plate frame (6) is convex with a matching boss (6-1). The end face of the matching boss (6-1) is sealed with the end face of the other side of the diaphragm (4). The end face of the matching boss (6-1) is synchronously concave with a boss cavity (6-2) at a position corresponding to the inner cavity (1-3). The cathode plate assembly (3) is arranged in the inner concave cavity (1-3), and the anode plate assembly (5) is arranged in the boss concave cavity (6-2).

2. The replaceable plate alkaline electrolytic cell according to claim 1, characterized in that: The electrolytic cell is composed of a plurality of electrolytic chambers connected in series or in parallel.

3. The replaceable plate alkaline electrolytic cell according to claim 1, characterized in that: The cathode plate frame (1) is respectively provided with a liquid inlet (1-1) and a liquid outlet (1-2).

4. The replaceable plate alkaline electrolytic cell according to claim 3, characterized in that: The cathode plate frame (1) is provided with flow channel holes on the side walls of the inner concave cavity (1-3) and the middle concave cavity (1-4) in the direction corresponding to the liquid inlet (1-1) and the liquid outlet (1-2), respectively, and the flow channel holes connect and penetrate the liquid inlet (1-1), the inner concave cavity (1-3) and the liquid outlet (1-2); the matching boss (6-1) of the anode plate frame (6) is provided with a flow channel hole at the position of the flow channel hole on the side wall of the middle concave cavity (1-4), and the flow channel holes connect and penetrate the liquid inlet (1-1), the boss concave cavity (6-2) and the liquid outlet (1-2).

5. The replaceable plate alkaline electrolytic cell according to claim 1, characterized in that: The cathode plate assembly (3) comprises a cathode plate and a cathode net which are fixedly connected, the cathode net being provided with a plurality of meshes spaced apart from each other, the cathode plate corresponding to the end face connected to the cathode net being provided with a plurality of nipple support protrusions (8), the outer end face of the nipple support protrusion (8) being supported and connected to the end face of one side of the cathode net, and the other end face of the cathode net being arranged close to the diaphragm (4).

6. The replaceable plate alkaline electrolytic cell according to claim 1, characterized in that: The anode plate assembly (5) comprises a fixedly connected anode plate and an anode net, the anode net being provided with a plurality of meshes spaced apart from each other, the anode plate corresponding to the end face connected to the anode net being provided with a plurality of mastoid support protrusions (8), the outer end face of the mastoid support protrusions (8) being supported and connected to the end face of one side of the anode net, and the other end face of the anode net being arranged close to the diaphragm (4).

7. The replaceable plate alkaline electrolytic cell according to claim 1, characterized in that: The electrolysis chambers are respectively provided with sealing gaskets (2) corresponding to the cathode plate assembly (3) and the anode plate assembly (5), wherein the sealing gaskets (2) are in a frame-shaped structure arranged around the plate assembly, wherein the sealing gasket (2) corresponding to the cathode plate assembly (3) is sealingly arranged between the connecting end surface between the inner concave cavity (1-3) and the middle concave cavity (1-4) and the diaphragm (4), and the sealing gasket (2) corresponding to the anode plate assembly (5) is sealingly arranged between the diaphragm (4) and the end surface of the matching boss (6-1).

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