A stable structure for a diaphragm of an electrodialysis device

Abstract

The utility model relates to a kind of electric dialysis device partition board stable structure, belong to electric dialysis equipment technical field, including plate frame and partition net, partition net adopts dacron woven net, partition net adopts LDPE material, partition net is first formed well, plate frame is formed, the formed well partition net is placed into the forming die of plate frame and is integrally formed, the both ends of plate frame length direction are integrally formed with liquid flow hole, when partition net and plate frame are integrally formed, the integrated structure of the formation of " mechanical occlusion+ molecular level infiltration" is without stratification, loose risk, compared with the water flow impact resistance, compression cycle ability of traditional fixed mode is more than 50%, to avoid partition net and plate frame connecting place break, affect the stability of electric dialysis equipment whole.

Description

Technical Field

[0001] This utility model relates to the field of electrodialysis equipment technology, and in particular to a stabilizing structure for the partition plate of an electrodialysis device. Background Technology

[0002] An electrodialysis device mainly consists of ion exchange membranes, separators, electrodes, electrode frames, and clamping devices. Between the alternating anion exchange membranes (referred to as anion membranes) and cation exchange membranes (referred to as cation membranes), concentrate separators and desalination separators are inserted respectively. Several holes are opened on the upper and lower sides of the membranes and separators. When the membranes and separators are overlapped in multiple layers, these holes form tubular channels for concentrate and desalination.

[0003] The baffle plate serves as the supporting framework and water flow channel for the entire electrodialysis device. It comprises a frame and a mesh. The frame has flow holes and distribution channels at both ends. The mesh works in conjunction with these channels to guide the water flow smoothly, achieving lateral diffusion and preventing flow deviation and dead zones. Current baffle plate production involves mass-producing injection-molded sheets, then machining the flow holes, distribution channels, and cavities for the mesh onto these sheets according to dimensional requirements. The mesh is then heat-welded to the frame, covering the cavities. In actual use, the connection between the mesh and the frame is prone to breakage, causing mesh displacement, affecting overall stability, and potentially leading to cross-contamination of concentrated and dilute water.

[0004] To address the problems in existing technologies, we propose a stabilizing structure for the partition plate of an electrodialysis device. Utility Model Content

[0005] This utility model addresses the problems in the prior art by providing a stabilizing structure for the partition plate of an electrodialysis device, which is achieved through the following technical solution: An electrodialysis device partition stabilization structure includes a plate frame and a partition mesh. The partition mesh is made of polyester woven mesh and LDPE material. The partition mesh is activated. When the plate frame is formed, the partition mesh is placed inside and integrally formed. Liquid flow holes are integrally formed at both ends of the plate frame in the length direction.

[0006] The present invention is further configured such that the mesh is integrally formed with reinforcing ribs on all four sides.

[0007] The present invention is further configured such that: the liquid flow hole includes a first liquid flow hole and a second liquid flow hole, the first liquid flow hole and the second liquid flow hole are alternately arranged along the width direction of the plate frame, the first liquid flow hole is a through hole, the second liquid flow hole is a stepped hole, a flow distribution plate is provided in the second liquid flow hole, the flow distribution plate is in contact with the stepped surface of the second liquid flow hole, the flow distribution plate is integrally formed with a third liquid flow hole, the third liquid flow hole is in communication with the second liquid flow hole, and a liquid distribution channel is integrally formed on the side wall of the flow distribution plate near the partition mesh, the liquid distribution channel is in communication with the third liquid flow hole.

[0008] The present invention is further configured such that the flow distribution plate and the plate frame are fixed by laser welding.

[0009] In summary, the beneficial technical effects of this utility model are as follows: 1. The mesh and the frame are integrally molded, forming an integrated structure of "mechanical interlocking + molecular-level wetting", eliminating the risk of delamination and loosening. It has more than 50% stronger resistance to water flow impact and pressure circulation than traditional fixing methods, thus avoiding the disconnection at the connection between the mesh and the frame, which would affect the overall stability of the electrodialysis equipment. 2. The liquid flow holes and the plate frame are integrally formed, and the liquid distribution channel and the third liquid flow hole are integrally formed with the distribution plate. This will not damage the continuity of the plate frame material, there is no stress concentration, and it is not easy to crack. At the same time, it can also avoid the generation of burrs and plastic residues, and avoid scratching the anion and cation exchange membrane and clogging the liquid distribution channel during assembly. Attached Figure Description

[0010] Figure 1 This is a top view used to illustrate the structure of this embodiment; Figure 2 It is along Figure 1 Sectional view of section line AA in the middle; Figure 3 yes Figure 2 A magnified view of part C in the middle; Figure 4 It is along Figure 2 Sectional view of the BB section line; Figure 5 This is a schematic diagram showing the cooperation between the display panel frame and the distribution plate; Figure 6 yes Figure 5 A magnified view of part D in the middle.

[0011] Reference numerals in the attached drawings: 1. Plate frame; 2. Partition mesh; 3. Reinforcing rib; 4. First liquid flow hole; 5. Second liquid flow hole; 6. Flow distribution plate; 7. Third liquid flow hole; 8. Liquid distribution channel. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to the accompanying drawings.

[0013] like Figure 1-6As shown, this utility model discloses a stabilizing structure for an electrodialysis device, comprising a frame 1 and a mesh 2. The mesh 2 is made of polyester woven mesh and LDPE material. The mesh 2 is pre-formed. During the forming of the frame 1, the pre-formed mesh 2 is placed into the forming mold of the frame 1 for integral forming. Liquid flow holes are integrally formed at both ends of the length direction of the frame 1. Because the mesh 2 has a smooth and inert surface with low surface tension, while the frame 1 is a non-polar material, the intermolecular forces between the two are weak. When the mesh 2 is integrally formed with the frame 1, it needs to be activated in advance using corona / plasma activation treatment, which can introduce polar groups such as hydroxyl and carboxyl groups on the polyester surface, while increasing the surface roughness and raising the surface tension to above 42 mN / m. The molding material melt of plate frame 1 can quickly spread and wrap polyester fibers to form an integrated structure of "mechanical interlocking + molecular level wetting", without the risk of delamination or loosening. It has more than 50% stronger resistance to water flow impact and pressure cycle than the traditional fixing method, thus avoiding the disconnection of the connection between the partition 2 and plate frame 1, which would affect the overall stability of the electrodialysis equipment.

[0014] The partition net 2 is integrally formed with reinforcing ribs 3 on all four sides, which are equivalent to the "skeleton" of the partition net 2. They can distribute the force and prevent the partition net 2 from being stretched or torn under assembly, forming or water flow impact. The integral forming of the reinforcing ribs 3 with the partition net 2 can prevent it from falling off later and does not affect the fitting with the plate frame 1.

[0015] The liquid flow holes include a first liquid flow hole 4 and a second liquid flow hole 5, which are alternately arranged along the width direction of the plate frame 1. The first liquid flow hole 4 is a through hole, and the second liquid flow hole 5 is a stepped hole. A distribution plate 6 is provided in the second liquid flow hole 5, and the distribution plate 6 is in contact with the stepped surface of the second liquid flow hole 5. A third liquid flow hole 7 is integrally formed on the distribution plate 6, and the third liquid flow hole 7 is in communication with the second liquid flow hole 5. A liquid distribution channel 8 is integrally formed on the side wall of the distribution plate 6 near the partition 2, and the liquid distribution channel 8 is in communication with the third liquid flow hole 7. The distribution plate 6 and the plate frame 1 are fixed by laser welding. The first liquid flow hole 4, the second liquid flow hole 5 and the plate frame 1 are integrally formed, and the liquid distribution channel 8 and the third liquid flow hole 7 are integrally formed with the distribution plate 6. This does not damage the continuity of the material of the plate frame 1, has no stress concentration, and is not prone to cracking. Conversely, if holes or grooves are made after the plate is formed, microcracks and stress concentrations will form at the channel edges. During electrodialysis operation, the partitions are subjected to long-term pressure and acid / alkali corrosion, and these weak points are prone to cracking, leading to cross-contamination of concentrated and desalinated water. In contrast, the edges of the integrally formed holes are smooth and undamaged, with fatigue strength 30-50% higher than post-processed ones, and a service life extended by 1-2 times. Furthermore, post-processing can produce burrs and plastic residue at the hole edges, which may scratch the more expensive anion and cation exchange membranes during assembly and block the liquid distribution channels.

Claims

1. A stabilizing structure for a partition in an electrodialysis device, comprising a plate frame (1) and a partition mesh (2), characterized in that, The partition mesh (2) is made of polyester woven mesh and LDPE material. The partition mesh (2) is activated. When the plate frame (1) is formed, the partition mesh (2) is placed in it and integrally formed. Liquid flow holes are integrally formed at both ends of the plate frame (1) in the length direction.

2. The stabilizing structure of the partition plate in an electrodialysis device according to claim 1, characterized in that, The mesh (2) is integrally formed with reinforcing ribs (3) on all four sides.

3. The stabilizing structure of the partition plate in an electrodialysis device according to claim 2, characterized in that, The liquid flow hole includes a first liquid flow hole (4) and a second liquid flow hole (5). The first liquid flow hole (4) and the second liquid flow hole (5) are alternately arranged along the width direction of the plate frame (1). The first liquid flow hole (4) is a through hole, and the second liquid flow hole (5) is a stepped hole. A distribution plate (6) is provided in the second liquid flow hole (5). The distribution plate (6) is in contact with the stepped surface of the second liquid flow hole (5). The distribution plate (6) is integrally formed with a third liquid flow hole (7). The third liquid flow hole (7) is in communication with the second liquid flow hole (5). A liquid distribution channel (8) is integrally formed on the side wall of the distribution plate (6) near the partition (2). The liquid distribution channel (8) is in communication with the third liquid flow hole (7).

4. The stabilizing structure of the partition plate in an electrodialysis device according to claim 3, characterized in that, The flow distribution plate (6) and the plate frame (1) are fixed by laser welding.

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