Electrodialysis partition plate

Abstract

The utility model discloses an electrodialysis partition plate, which belongs to the field of electrodialysis and comprises a first sealing layer, a second sealing layer, a partition net, a liquid distribution runner and a liquid guide hole, the partition net is arranged between the first sealing layer and the second sealing layer, the first sealing layer is positioned on the front side of the partition net, and the second sealing layer is positioned on the rear side of the liquid distribution runner. The middle of the first sealing layer and the middle of the second sealing layer are each provided with a cavity, one part of the partition net is exposed out of the cavity, the other part of the partition net is connected with the first sealing layer and the second sealing layer to form a plate frame part, the two ends of the plate frame part are each provided with at least one liquid guide set, and each liquid guide set comprises four liquid guide holes and one liquid distribution flow channel communicated with the liquid guide holes. And the liquid distribution flow channel is communicated with the cavity. The mode that the separation net is clamped between the first sealing layer and the second sealing layer is adopted, direct hot press forming is carried out, the separation net does not need to be independently connected into the cavity, different separation net action shapes are formed through arrangement of different cavity shapes, and the application range is wide.

Description

Technical Field

[0001] The utility model belongs to the field of electrodialysis, and in particular relates to an electrodialysis separator. Background Art

[0002] The electrodialysis separator is a key component in the electrodialyzer. It is usually located between the anion and cation membranes, and plays a supporting and separating role to prevent the membrane surface from overlapping and short-circuiting. At the same time, it also forms a water flow channel to make the water flow evenly distributed, and can generate turbulence to stir, so that ions can diffuse, achieving the purpose of improving desalination efficiency and reducing power consumption.

[0003] An electrodialysis partition with publication number CN220802671U includes a plate frame, a cavity is provided in the center of the plate frame, a partition is provided in the cavity, a liquid guide hole is provided on the plate frame, a water distribution channel is provided between the liquid guide hole and the cavity, the water distribution channel includes a channel groove and a support plate bonded and fixed on the channel groove, the channel groove connects the liquid guide hole and the cavity, the channel groove has a flow groove formed by multiple partitions, and adhesive fixing plates are provided on both sides of the support plate, the outer wall of the adhesive fixing plate is bonded and fixed to the side wall of the channel groove, and the end corners of the adhesive fixing plate are provided with support blocks. The method of opening a cavity in the middle of the plate frame and then connecting the partition in the cavity is adopted. This method results in that the cavity and the partition can only be rectangles with regular edges. If the edge is set to an arc or other shapes, it will cause the partition to be difficult to stably connect with the plate frame, resulting in water leakage. In addition, the existing two-compartment electrodialysis membrane assembly requires two different partitions, and each partition needs to be molded once, which is costly. Utility Model Content

[0004] The purpose of the utility model is to provide an electrodialysis separator to overcome at least one of the above-mentioned defects in the prior art.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides an electrodialysis separator, comprising a first sealing layer, a second sealing layer, a partition net, a liquid distribution channel, and a liquid guide hole, wherein the partition net is arranged between the first sealing layer and the second sealing layer, the first sealing layer is located on the front side of the partition net, the middle parts of the first sealing layer and the second sealing layer both have a cavity, a part of the partition net is exposed in the cavity, and the other part of the partition net is connected with the first sealing layer and the second sealing layer to form a plate frame part, at both ends of the plate frame part there is at least one group of liquid guide groups, each group of liquid guide groups comprises 4 liquid guide holes, and a liquid distribution channel connected with the liquid guide holes, the liquid distribution channel is connected with the cavity, the liquid distribution channels at both ends of the plate frame part are staggered, and when there are multiple groups of liquid guide groups, the multiple groups of liquid guide groups are spaced and distributed along the width direction of the plate frame part.

[0007] Preferably, the corners of the cavity are provided with arc-shaped water guiding sections.

[0008] Preferably, the plate frame portion is provided with an installation area, the installation area is connected to the liquid guide hole and the cavity, the front side of the plate frame portion on the left and right sides of the installation area is provided with installation grooves, the left and right side walls of the liquid distribution channel protrude outward to form an extension portion, the liquid distribution channel is installed in the installation area, and the extension portion is installed in the installation groove. After installation, the front side surface of the liquid distribution channel and the front side surface of the extension portion are both on the same horizontal plane with the front side surface of the first sealing layer.

[0009] Preferably, the liquid distribution channel includes a supporting layer, a third sealing layer, and a fourth sealing layer. The front and rear sides of the supporting layer are respectively compounded with at least one third sealing layer and at least one fourth sealing layer. A plurality of water flow channels are opened inside the supporting layer, and the water flow channels run through the upper and lower side walls of the supporting layer.

[0010] Preferably, the first sealing layer and the second sealing layer are made of PVC, the partition net and the support layer are made of PP, and the third sealing layer and the fourth sealing layer are made of EPDM.

[0011] Preferably, the cross-section of the water flow channel is one of a circle, an ellipse or a regular polygon.

[0012] Preferably, the support layer has a Shore C hardness of 85-95, and the third sealing layer and the fourth sealing layer have a Shore C hardness of 50-70.

[0013] Preferably, a water collecting trough is provided on the water inlet side of the liquid distribution channel.

[0014] Preferably, the supporting layer, the third sealing layer, the fourth sealing layer, the extension portion, the water flow channel, and the water collecting tank are integrally formed by one-time injection molding.

[0015] Preferably, the liquid distribution channels of each liquid guiding group at one end of the plate frame portion are connected to the nth liquid guiding hole of the group, and n is 1, 2, 3 or 4. When n=1 or 2, the liquid distribution channels of each liquid guiding group at the other end of the plate frame portion are connected to the n+2th liquid guiding hole of the group. When n=3 or 4, the liquid distribution channels of each liquid guiding group at the other end of the plate frame portion are connected to the n-2th liquid guiding hole of the group.

[0016] The beneficial effects of the utility model are:

[0017] 1. The partition net is sandwiched between the first sealing layer and the second sealing layer, and is directly hot-pressed to form. There is no need to connect the partition net to the cavity separately. Different partition net effect shapes can be formed by setting different cavity shapes, and the application range is wide.

[0018] 2. The redundant partition mesh is combined with the first sealing layer and the second sealing layer to form a plate frame portion, in which the partition mesh plays a supporting role.

[0019] 3. Through the combination of the first sealing layer, the second sealing layer, and the partition net, the plate frame has good strength, stiffness and sealing performance, good processing performance, adaptable to various welding processing techniques, not easy to delaminate, and good overall sealing.

[0020] 4. The setting of the arc-shaped water guide section is more conducive to the inflow and outflow of liquid.

[0021] 5. The liquid distribution channel and the plate frame are not designed as an integrated whole and can be produced separately. The liquid distribution channel and the plate frame can be installed in combination according to demand to form different types of electrodialysis separators with strong market adaptability.

[0022] 6. The installation surface of the extension part and the installation groove is located on the inner side, and the connection surface is not on the surface, which will not cause glue overflow, ensuring the flatness of the surface of the electrodialysis partition after the liquid distribution channel is installed, and effectively improving the overall sealing.

[0023] 7. Through the co-extrusion design of the support layer, the third sealing layer, and the fourth sealing layer, the liquid distribution channel has good strength, stiffness and sealing performance, good processing performance, adaptable to various welding processing technologies, not easy to delaminate, and good overall sealing.

[0024] 8. By setting the water flow channel inside the support layer rather than on the surface, the collapse or blockage caused by pressure can be effectively avoided and the sealing performance can be improved.

[0025] 9. The support layer, the third sealing layer, the fourth sealing layer, the extension part, and the water flow channel are integrally molded by one-time injection molding. Only one injection molding is required, and the injection molding process is simple and the strength is high.

[0026] 10. Two different electrodialysis separators can be formed by rotating the electrodialysis separator. Only one type of electrodialysis separator is needed, and only one mold is needed. It can be applied to two compartments, which greatly reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a main structural schematic diagram of the utility model.

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model in the upward viewing direction.

[0029] Figure 3 It is a schematic diagram of the main structure of the liquid distribution channel of the utility model.

[0030] Figure 4 It is a schematic diagram of the structure of the liquid distribution channel of the utility model when viewed from above.

[0031] Figure 5 It is a schematic diagram of the matching structure of the liquid distribution flow channel and the plate frame part of the utility model.

[0032] Figure 6It is a main structural schematic diagram of the plate frame part of the utility model.

[0033] Figure 7 yes Figure 6 Schematic diagram of the enlarged structure of A.

[0034] Figure 8 The utility model is a Figure 1 Schematic diagram of the main structure with the center line rotated 180°.

[0035] The markings in the accompanying drawings are: 1-first sealing layer, 2-second sealing layer, 3-partition net, 4-liquid distribution channel, 5-liquid guide hole, 6-cavity, 7-plate frame part, 8-arc-shaped water guide section, 9-installation area, 10-installation groove, 41-extension part, 42-support layer, 43-third sealing layer, 44-fourth sealing layer, 45-water flow channel, 46-water collecting tank. DETAILED DESCRIPTION

[0036] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0037] Contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field. In the description of the present utility model, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0038] like Figures 1 to 8As shown, an electrodialysis separator provided in this embodiment includes a first sealing layer 1, a second sealing layer 2, a partition net 3, a liquid distribution channel 4, and a liquid guide hole 5. The partition net 3 is arranged between the first sealing layer 1 and the second sealing layer 2, and the first sealing layer 1 is located on the front side of the partition net 3. The middle parts of the first sealing layer 1 and the second sealing layer 2 both have a cavity 6. A part of the partition net 3 is exposed in the cavity 6, and the other part of the partition net 3 is connected to the first sealing layer 1 and the second sealing layer 2 to form a plate frame part 7. There is at least one group of liquid guide groups at both ends of the plate frame part 7, and each group of liquid guide groups includes 4 liquid guide holes 5 and 1 liquid distribution channel 4 connected with the liquid guide holes 5. The liquid distribution channel 4 is connected with the cavity 6. The liquid distribution channels 4 at both ends of the plate frame part 7 are staggered. When there are multiple groups of liquid guide groups, the multiple groups of liquid guide groups are spaced apart along the width direction of the plate frame part 7. The partition net 3 is sandwiched between the first sealing layer 1 and the second sealing layer 2, and is directly hot-pressed. It is no longer necessary to connect the partition net 3 to the cavity 6 separately. Different shapes of the partition net 3 are formed by setting different shapes of the cavity 6, and the application range is wide. The redundant partition net 3 is combined with the first sealing layer 1 and the second sealing layer 2 to form a plate frame 7, and the partition net 3 plays a supporting role in the plate frame 7. Through the combination of the first sealing layer 1, the second sealing layer, and the partition net 3, the plate frame 7 has good strength, stiffness and sealing performance, good processing performance, adaptable to various welding processing technologies, and not easy to delaminate, and has good overall sealing performance.

[0039] The corners of the cavity 6 are provided with arc-shaped water guide sections 8. The arrangement of the arc-shaped water guide sections 8 is more conducive to the inflow and outflow of liquid.

[0040] Among them, the plate frame part 7 is provided with an installation area 9, and the installation area 9 is connected to the liquid guide hole 5 and the cavity 6. The front side of the plate frame part 7 on the left and right sides of the installation area 9 is provided with an installation groove 10. The left and right side walls of the liquid distribution channel 4 protrude outward to form an extension part 41. Specifically, the extension part is formed by the third sealing layer and the support layer protruding outward. The liquid distribution channel 4 is installed in the installation area 9, and the extension part 41 is installed in the installation groove 10. After installation, the front side surface of the liquid distribution channel 4 and the front side surface of the extension part 41 are both on the same horizontal plane as the front side surface of the first sealing layer 1. The liquid distribution channel 4 and the plate frame part 7 are not designed as an integral whole, and can be produced separately. The liquid distribution channel 4 and the plate frame part 7 can be combined and installed according to demand to form different types of electrodialysis partitions, and the market adaptability is strong. The installation surface of the extension part 41 and the installation groove 10 is located on the inner side, and the connection surface is not on the surface, which will not cause glue overflow, ensuring the flatness of the surface of the electrodialysis partition after the liquid distribution channel 4 is installed, and effectively improving the overall sealing.

[0041] Among them, the liquid distribution channel 4 includes a support layer 42, a third sealing layer 43, and a fourth sealing layer 44. The front and rear sides of the support layer 42 are respectively compounded with at least one third sealing layer 43 and at least one fourth sealing layer 44. The third sealing layer is located on the front side of the fourth sealing layer. A plurality of water flow channels 45 are provided inside the support layer 42, and the water flow channels 45 penetrate the upper and lower side walls of the support layer 42. The cross-sections of the water flow channels 45 in this embodiment are all circular, and in other embodiments they can also be elliptical or regular polygonal. Through the co-extrusion design of the support layer 42, the third sealing layer 43, and the fourth sealing layer 44, the liquid distribution channel 4 has good strength, stiffness and sealing performance, good processing performance, adaptable to various welding processing techniques, and not easy to delaminate, and has good overall sealing performance. By setting the water flow channel 45 inside the support layer 42 rather than on the surface, the collapse or blockage caused by pressure can be effectively avoided, and the sealing performance can be improved.

[0042] The first sealing layer 1 and the second sealing layer 2 are made of PVC, the spacer 3 and the support layer 42 are made of PP, and the third sealing layer 43 and the fourth sealing layer 44 are made of EPDM. PVC is durable and chemically resistant, PP is strong, and EPDM has good temperature resistance.

[0043] The support layer 42 has a Shore C hardness of 85, and the third sealing layer 43 and the fourth sealing layer 44 have a Shore C hardness of 70, which ensures sufficient strength and softness and has good sealing performance.

[0044] A water collecting trough 46 is provided on the water inlet side of the liquid distribution channel 4 to collect water.

[0045] The support layer 42, the third sealing layer 43, the fourth sealing layer 44, the extension portion 41, the water flow channel 45, and the water collecting tank 46 are integrally molded by one injection molding. Only one injection molding is required, and the injection molding process is simple and the strength is high.

[0046] In this embodiment, the liquid distribution channels 4 of each liquid-conducting group at the upper end of the plate frame 7 are connected to the first liquid-conducting hole 5 of the group, and the liquid distribution channels of each liquid-conducting group at the lower end of the plate frame 7 are connected to the third liquid-conducting hole 5 of the group. In the two compartments, the electrodialysis partition is rotated 180° around its center line, and the liquid distribution channels 4 of each liquid-conducting group at the upper end of the plate frame 7 of the electrodialysis partition are connected to the second liquid-conducting hole 5 of the group, and the liquid distribution channels of each liquid-conducting group at the lower end of the plate frame 7 are connected to the fourth liquid-conducting hole 5 of the group. In this way, two different electrodialysis partitions can be formed by rotating the electrodialysis partition, and only one type of electrodialysis partition is needed, and only one mold needs to be opened, which can be applied to two compartments, greatly reducing costs.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electrodialysis separator, characterized in that: It includes a first sealing layer, a second sealing layer, a partition net, a liquid distribution channel, and a liquid guide hole; The partition net is arranged between the first sealing layer and the second sealing layer, and the first sealing layer is located at the front side of the partition net; The first sealing layer and the second sealing layer both have cavities in the middle, a portion of the partition net is exposed in the cavity, and another portion of the partition net is connected to the first sealing layer and the second sealing layer to form a plate frame portion; Both ends of the plate frame portion are provided with at least one liquid guide group; Each liquid guide group includes four liquid guide holes and a liquid distribution channel connected to the liquid guide holes, and the liquid distribution channel is connected to the cavity; The liquid distribution channels at both ends of the plate frame are staggered; When there are multiple liquid guiding groups, the multiple liquid guiding groups are distributed at intervals along the width direction of the plate frame portion.

2. The electrodialysis separator according to claim 1, characterized in that: The corners of the cavity are provided with arc-shaped water guiding sections.

3. The electrodialysis separator according to claim 1, characterized in that: The plate frame portion is provided with an installation area, and the installation area is connected with the liquid guide hole and the cavity; The front sides of the plate frame parts on the left and right sides of the installation area are provided with installation grooves; The left and right side walls of the liquid distribution channel protrude outward to form an extension portion; The liquid distribution channel is installed in the installation area, and the extension portion is installed in the installation groove; After installation, the front side surface of the liquid distribution channel and the front side surface of the extension portion are both on the same horizontal plane as the front side surface of the first sealing layer.

4. The electrodialysis separator according to claim 3, characterized in that: The liquid distribution channel includes a support layer, a third sealing layer, and a fourth sealing layer; The front and rear sides of the support layer are respectively compounded with at least one third sealing layer and at least one fourth sealing layer; A plurality of water flow channels are provided inside the support layer, and the water flow channels penetrate the upper and lower side walls of the support layer.

5. The electrodialysis separator according to claim 4, characterized in that: The first sealing layer and the second sealing layer are both made of PVC; The materials of the partition net and the support layer are both PP; The third sealing layer and the fourth sealing layer are both made of EPDM.

6. The electrodialysis separator according to claim 4, characterized in that: The cross-section of the water flow channel is one of a circle, an ellipse or a regular polygon.

7. The electrodialysis separator according to claim 4, characterized in that: The Shore C hardness of the support layer is 85-95; The third sealing layer and the fourth sealing layer both have a Shore C hardness of 50-70.

8. The electrodialysis separator according to claim 4, characterized in that: A water collecting trough is provided on the water inlet side of the liquid distribution channel.

9. The electrodialysis separator according to claim 8, characterized in that: The support layer, the third sealing layer, the fourth sealing layer, the extension part, the water flow channel, and the water collecting tank are integrally formed by one-time injection molding.

10. The electrodialysis separator according to claim 1, characterized in that: The liquid distribution channels of each liquid guide group at one end of the plate frame portion are connected to the nth liquid guide hole of the group, where n is 1, 2, 3 or 4; When n=1 or 2, the liquid distribution flow channel of each liquid guide group at the other end of the plate frame portion is connected to the n+2th liquid guide hole of the group; When n=3 or 4, the liquid distribution channels of each liquid guiding group at the other end of the plate frame portion are connected to the n-2 th liquid guiding hole of the group.

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