Corrosion-resistant composite polar plate for electrolytic bath

Abstract

The utility model discloses a corrosion-resistant composite polar plate for an electrolytic bath, which comprises a graphite main polar plate, a graphite auxiliary polar plate, a partition plate, a sealing ring, a main limiting plate, an auxiliary limiting plate, a frame groove, a sealing frame and a connecting belt, the partition plate is attached between the graphite main polar plate and the graphite auxiliary polar plate, and the sealing ring is sleeved outside the partition plate between the graphite main polar plate and the graphite auxiliary polar plate. A main limiting groove and an auxiliary limiting groove are symmetrically formed in the positions, making contact with the partition plate, of the independent plate bodies of the graphite main polar plate and the graphite auxiliary polar plate respectively, and the composite polar plate with the inner supporting and the outer supporting composite is used for the electrolytic bath, and when the composite polar plate is used at the electrolytic bath, multi-point embedded connection supporting exists in the composite polar plate. And the two groups of outward plate bodies of the composite polar plate are tightened and reinforced by the elastic belt bodies, so that when the composite polar plate is subjected to long-term pressure in the electrolytic bath, the composite polar plate is high in strength, and the plate bodies are not easy to break after being pressed for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of pole plates, in particular to a corrosion-resistant composite pole plate for an electrolytic cell. Background Art

[0002] The electrolyzer is mainly composed of cathode plates, anode plates, membrane electrodes, cathode current collectors and anode current collectors. The plates are used to support the current collectors and membrane electrodes, transfer electrons and provide channels for material flow. They are key components of PEM electrolyzers. There are two main types of composite plates for electrolyzers. One is a composite material bipolar plate, which uses graphite as the main material and is made into plates after being mixed with resin. The resin not only enhances the mechanical strength of the graphite plate, but also improves its gas barrier properties. The other is a multilayer composite bipolar plate, which uses thin metal as the separator and graphite plate as the flow field plate. The metal and graphite plate are bonded with conductive adhesive. The thin metal improves the strength and gas barrier properties of the bipolar plate, and compared with the composite material bipolar plate, it is simple to make, low cost and has good conductivity.

[0003] The composite electrode plates in the prior art are made of graphite as the main material. Graphite material has good chemical inertness, is not easily corroded and oxidized by acids and alkalis, and has corrosion resistance. The composite bipolar plate graphite plates made of graphite bonded with conductive adhesive are prone to breakage due to brittle graphite under long-term pressure resistance, resulting in hidden dangers in the service life and safety of the composite electrode plates. For this reason, we propose a corrosion-resistant composite electrode plate for electrolytic cells. Utility Model Content

[0004] The main purpose of the utility model is to provide a corrosion-resistant composite electrode plate for an electrolytic cell. The composite electrode plate with internal and external supports is used in the electrolytic cell. When the composite electrode plate of the utility model is used in the electrolytic cell, there are multiple embedded supports inside the composite electrode plate, and the two groups of outward plates of the composite electrode plate are reinforced by means of elastic bands. When the composite electrode plate is subjected to long-term pressure in the electrolytic cell, the composite electrode plate has high strength, which ensures that the plate itself is not easily broken after long-term pressure, and can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A corrosion-resistant composite electrode plate for an electrolytic cell, comprising a graphite main electrode plate, a graphite counter electrode plate, a separator, a sealing ring, a main limit plate, a counter limit plate, a frame groove, a sealing frame and a joint, wherein a separator is attached between the graphite main electrode plate and the graphite counter electrode plate, a sealing ring is clamped outside the separator between the graphite main electrode plate and the graphite counter electrode plate, main limit grooves and counter limit grooves are symmetrically opened at the independent plate bodies of the graphite main electrode plate and the graphite counter electrode plate contacting the separator, and the double-sided plate body of the separator is symmetrically The protrusions are provided with a main limit plate and a supporting limit plate, which are respectively inserted into the main limit groove and the supporting limit groove, and the narrow side plate surfaces of the graphite main pole plate and the graphite supporting pole plate are recessed with a frame groove, and a sealing frame is inserted into the frame groove, and a flow groove is centrally provided on the outer plate surfaces of the graphite main pole plate and the graphite supporting pole plate away from the partition, and a surface groove communicating with the frame groove is provided on the surface of the graphite main pole plate and the graphite supporting pole plate outside the flow groove, and a connecting belt connected to the sealing frame is inserted into the surface groove.

[0007] Furthermore, two groups of surface grooves are symmetrically opened on the surfaces of the independent plates of the graphite main pole plate and the graphite counter pole plate; the two groups of surface grooves on the surfaces of the graphite main pole plate and the graphite counter pole plate can be inserted into the two groups of connecting straps, so that the sealing frame can elastically clamp the graphite main pole plate and the graphite counter pole with the help of the two groups of connecting straps.

[0008] Furthermore, the sealing ring, the sealing frame and the joint are elastic; the sealing ring, the sealing frame and the joint can be pulled elastically.

[0009] Furthermore, the main limit plate has the same size as the main limit slot, and the auxiliary limit plate has the same size as the auxiliary limit slot; the main limit plate can be fitted into the main limit slot, and the auxiliary limit plate can be fitted into the auxiliary limit slot.

[0010] Furthermore, resin conductive glue is bonded between the graphite main pole plate, the graphite counter pole plate and the partition, resin conductive glue is bonded between the main limit plate and the main limit groove, and resin conductive glue is bonded between the counter limit plate and the counter limit groove; the graphite main pole plate, the graphite counter pole plate and the partition are fixed by means of resin conductive glue, and the counter limit plate and the counter limit groove are fixed by means of resin conductive glue.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model provides a composite electrode plate with internal and external supports for use in an electrolytic cell. When the composite electrode plate of the utility model is used in the electrolytic cell, there are multiple embedded supports inside the composite electrode plate, and two groups of outward plates of the composite electrode plate are reinforced by means of elastic bands. When the composite electrode plate is subjected to long-term pressure in the electrolytic cell, the composite electrode plate has high strength, ensuring that the plate body itself is not easily broken after being subjected to long-term pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1The utility model is a schematic diagram of the overall structure of a corrosion-resistant composite electrode plate for an electrolytic cell.

[0014] Figure 2 The utility model is an exploded view of a corrosion-resistant composite electrode plate for an electrolytic cell.

[0015] Figure 3 The utility model is a schematic diagram of the disassembly of the sealing frame and the frame groove of the corrosion-resistant composite plate for the electrolytic cell.

[0016] In the figure: 1. Graphite main electrode plate; 2. Graphite counter electrode plate; 3. Partition plate; 4. Sealing ring; 5. Main limit groove; 6. Counter limit groove; 7. Main limit plate; 8. Counter limit plate; 9. Flow groove; 10. Frame groove; 11. Sealing frame; 12. Surface groove; 13. Joint. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] like Figure 1-3 As shown, a corrosion-resistant composite electrode plate for an electrolytic cell comprises a graphite main electrode plate 1, a graphite counter electrode plate 2, a separator 3, a sealing ring 4, a main limit plate 7, a counter limit plate 8, a frame groove 10, a sealing frame 11 and a joint 13, wherein the separator 3 is attached between the graphite main electrode plate 1 and the graphite counter electrode plate 2, and a sealing ring 4 is inserted outside the separator 3 between the graphite main electrode plate 1 and the graphite counter electrode plate 2, and the main limit groove 5 and the counter limit groove 6 are symmetrically opened at the independent plate bodies of the graphite main electrode plate 1 and the graphite counter electrode plate 2 contacting the separator 3, and the double-sided plate body of the separator 3 is symmetrically protruded There are a main limit plate 7 and a supporting limit plate 8, which are respectively inserted into the main limit groove 5 and the supporting limit groove 6. The narrow side plate surfaces of the graphite main pole plate 1 and the graphite supporting pole plate 2 are recessed with a frame groove 10, and a sealing frame 11 is inserted into the frame groove 10. The outer plate surfaces of the graphite main pole plate 1 and the graphite supporting pole plate 2 away from the partition 3 are centrally provided with a flow groove 9, and the surfaces of the graphite main pole plate 1 and the graphite supporting pole plate 2 outside the flow groove 9 are provided with a surface groove 12 that communicates with the frame groove 10, and a connecting band 13 connected to the sealing frame 11 is inserted into the surface groove 12.

[0019] Among them, the surface grooves 12 are symmetrically opened in two groups on the surfaces of the independent plates of the graphite main pole plate 1 and the graphite counter pole plate 2; the two groups of surface grooves 12 on the surfaces of the graphite main pole plate 1 and the graphite counter pole plate 2 can be inserted into the two groups of connecting straps 13, so that the sealing frame 11 can elastically clamp the graphite main pole plate 1 and the graphite counter pole with the help of the two groups of connecting straps 13.

[0020] The sealing ring 4 , the sealing frame 11 and the connecting strip 13 are elastic; the sealing ring 4 , the sealing frame 11 and the connecting strip 13 can be pulled elastically.

[0021] Among them, the plate body size of the main limit plate 7 is the same as the slot body size of the main limit slot 5, and the plate body size of the auxiliary limit plate 8 is the same as the slot body size of the auxiliary limit slot 6; the main limit plate 7 can be adapted to be inserted into the main limit slot 5, and the auxiliary limit plate 8 can be adapted to be inserted into the auxiliary limit slot 6.

[0022] Among them, resin conductive glue is bonded between the graphite main pole plate 1, the graphite counter-pole plate 2 and the partition 3, resin conductive glue is bonded between the main limit plate 7 and the main limit groove 5, and resin conductive glue is bonded between the counter-pole plate 8 and the counter-pole groove 6; the graphite main pole plate 1, the graphite counter-pole plate 2 and the partition 3 are fixed by means of resin conductive glue, and the counter-pole plate 8 and the counter-pole groove 6 are fixed by means of resin conductive glue.

[0023] It should be noted that the utility model is a corrosion-resistant composite plate for an electrolytic cell. After the main limit plate 7 and the auxiliary limit plate 8 are arranged on the surface of the separator 3, the main limit groove 5 and the auxiliary limit groove 6 of the graphite main plate 1 and the graphite auxiliary plate 2 meet the main limit plate 7 and the auxiliary limit plate 8 for clamping support, and then the graphite main plate 1 and the graphite auxiliary plate 2 are fixed by means of a resin conductive adhesive to form a composite plate, and the respective plate surfaces of the graphite main plate 1 and the graphite auxiliary plate 2 can be connected closely by means of a frame groove 10. The sealing frame 11, and the connecting belt 13 of the sealing frame 11 can be clamped in the surface groove 12 on the surface of the graphite main electrode plate 1 and the graphite counter electrode plate 2. When the composite electrode plate of the utility model is used in an electrolytic cell, there are multiple embedded supports inside the composite electrode plate, and the two groups of outward plates of the composite electrode plate are clamped and reinforced by means of elastic belts. When the composite electrode plate is subjected to long-term pressure in the electrolytic cell, the composite electrode plate has high strength and is not easy to break. At the same time, there are flow grooves 9 outside the surface of each plate of the composite electrode plate to circulate fluid.

[0024] It should be noted that the utility model is a corrosion-resistant composite electrode plate for an electrolytic cell. The components in the utility model are all components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0025] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A corrosion-resistant composite plate for an electrolytic cell, characterized in that: The invention comprises a graphite main electrode plate (1), a graphite counter electrode plate (2), a separator (3), a sealing ring (4), a main limit plate (7), a counter plate (8), a frame groove (10), a sealing frame (11) and a joint (13); the separator (3) is bonded between the graphite main electrode plate (1) and the graphite counter electrode plate (2); the separator (3) between the graphite main electrode plate (1) and the graphite counter electrode plate (2) is provided with a sealing ring (4); the main limit groove (5) and the counter plate (6) are symmetrically provided at the independent plate bodies of the graphite main electrode plate (1) and the graphite counter electrode plate (2) contacting the separator (3); the main limit plate (7) and the counter plate (8) are symmetrically protruded outside the double-sided plate body of the separator (3); The main limiting plate (7) and the auxiliary limiting plate (8) are respectively inserted into the main limiting groove (5) and the auxiliary limiting groove (6); the narrow side plate surfaces of the graphite main pole plate (1) and the graphite auxiliary pole plate (2) are recessed with a frame groove (10), and a sealing frame (11) is inserted into the frame groove (10); the outer plate surfaces of the graphite main pole plate (1) and the graphite auxiliary pole plate (2) away from the partition plate (3) are centrally provided with a flow groove (9), and the surfaces of the graphite main pole plate (1) and the graphite auxiliary pole plate (2) outside the flow groove (9) are provided with a surface groove (12) which is interconnected with the frame groove (10), and a connecting belt (13) connected with the sealing frame (11) is inserted into the surface groove (12).

2. The corrosion-resistant composite electrode plate for an electrolytic cell according to claim 1, characterized in that: The surface grooves (12) are symmetrically provided in two groups on the surfaces of the independent plates of the graphite main electrode plate (1) and the graphite counter electrode plate (2).

3. The corrosion-resistant composite electrode plate for an electrolytic cell according to claim 1, characterized in that: The sealing ring (4), the sealing frame (11) and the connecting belt (13) are elastic.

4. The corrosion-resistant composite electrode plate for an electrolytic cell according to claim 1, characterized in that: The plate body size of the main limiting plate (7) is the same as the slot body size of the main limiting slot (5), and the plate body size of the auxiliary limiting plate (8) is the same as the slot body size of the auxiliary limiting slot (6).

5. The corrosion-resistant composite electrode plate for an electrolytic cell according to claim 1, characterized in that: Resin conductive adhesive is bonded between the graphite main electrode plate (1), the graphite counter electrode plate (2) and the separator (3), resin conductive adhesive is bonded between the main limit plate (7) and the main limit groove (5), and resin conductive adhesive is bonded between the counter limit plate (8) and the counter limit groove (6).

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