A compact electrodialysis device

Abstract

This utility model discloses a compact electrodialysis device, including a right end plate, a partition plate disposed on one side of the right end plate, and a left end plate disposed on the side of the partition plate away from the right end plate. Bipolar membrane stacks are installed between the right end plate and the partition plate, and between the left end plate and the partition plate. Several double-ended compression bolt assemblies for tightening the bipolar membrane stacks are installed on the front and rear outer walls of the right end plate, the left end plate, and the partition plate. A support beam is installed at the upper end of the right end plate, the left end plate, and the partition plate. This utility model stacks bipolar membranes are superimposed between the right end plate, the partition plate, and the left end plate, and the double-ended compression bolt assemblies are used to compress the bipolar membrane stacks between the right end plate and the partition plate, and between the left end plate and the partition plate. The support beam improves the structural strength of the right end plate, the partition plate, and the left end plate.

Description

Technical Field

[0001] This utility model relates to the field of electrodialysis technology, specifically to a compact electrodialysis device. Background Technology

[0002] Bipolar membrane stacks are the core components of electrodialysis equipment, mainly composed of multiple layers of cathode and anodic polar membranes, combined with an intermediate ion exchange layer to form a complex structure. Designed to achieve highly efficient ion separation and migration, they are widely used in water treatment and ion separation. The structural features of bipolar membranes include membranes that selectively allow different ions to pass through, and an ion exchange layer that provides support and isolation, ensuring clear ion pathways between membranes and enhancing separation efficiency. The working principle is based on ion migration under the influence of an electric field. When a voltage is applied, anions migrate towards the anode, and cations migrate towards the cathode. The ion exchange layer of the bipolar membrane selectively allows the passage of ions based on their charge properties, achieving the target separation. Meanwhile, bipolar membranes can also electrolyze water under certain conditions, producing hydrogen and hydroxides, which can be used to adjust the pH value of water or to carry out other chemical reactions. For example, an electrodialysis membrane module disclosed in patent announcement number CN222567366U includes an electrodialysis membrane module and a drain base detachably disposed at the bottom of the electrodialysis membrane module. The drain base includes a raised portion and a mounting portion disposed on top of the raised portion. The bottom end of the electrodialysis membrane module is placed on top of the raised portion. The side wall of the electrodialysis membrane module is detachably connected to the mounting portion. Several first drainage grooves are formed along the length of the top of the raised portion, which, through a structure... A simple drainage base can be detachably installed at the bottom of the electrodialysis membrane module, which can solve the problem of rust on the clamping iron plate and is easy to disassemble and assemble. However, the above technical solution mainly relies on the clamping iron plate to clamp the membrane stack during use. However, when the membrane stack is thick, after the two clamping iron plates are clamped by bolts, the pressure applied by the bolts is concentrated in the area near the bolts. As the distance from the bolts increases, the stress gradually weakens, resulting in the membrane module in the middle area not being fully compressed. At this time, the uneven stress distribution will cause local gaps or loosening, affecting the tight bond between the membrane and the support structure, which may cause leakage or reduced ion conduction efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a compact electrodialysis device in which a bipolar membrane stack is stacked between the right end plate, the partition plate, and the left end plate. The bipolar membrane stack is compressed between the right end plate and the partition plate, and between the left end plate and the partition plate, by using a double-end compression bolt assembly. The structural strength of the right end plate, the partition plate, and the left end plate is improved by a support beam, thereby solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a compact electrodialysis device, comprising a right end plate, a partition plate disposed on one side of the right end plate, and a left end plate disposed on the side of the partition plate away from the right end plate. Bipolar membrane stacks are installed between the right end plate and the partition plate, and between the left end plate and the partition plate. A plurality of double-ended compression bolts for tightening the bipolar membrane stacks are installed on the front and rear outer walls of the right end plate, the left end plate, and the partition plate. A support beam is installed at the upper end of the right end plate, the left end plate, and the partition plate.

[0005] Preferably, I-shaped hollow pipes are installed on the outer walls of the right end plate and the left end plate, which are far apart.

[0006] Preferably, a plurality of externally threaded pins that penetrate to the outside of the I-shaped hollow pipe flange are installed on the outer walls of the right end plate and the left end plate respectively.

[0007] Preferably, the bottom end of the partition is provided with a rectangular notch, and the opposite outer walls of the right end plate and the left end plate are provided with rectangular cavities, and square beams are installed in the rectangular notch and rectangular cavities.

[0008] Preferably, the double-ended compression bolt assembly includes U-shaped notches on the right end plate, left end plate, and front and rear outer walls of the partition, and bidirectional threaded columns installed between the three U-shaped notches in the same horizontal direction, with nuts installed at both ends of the bidirectional threaded columns.

[0009] Preferably, two central protrusions are installed on both sides of the surface of the right end plate, the left end plate, and the partition, and countersunk holes concentric with the central protrusions are installed on the back of the right end plate, the left end plate, and the partition.

[0010] Compared with existing technologies, the beneficial effects of this utility model are as follows: This compact electrodialysis device employs a structure comprising a right end plate, a bipolar membrane stack, a partition, a left end plate, a double-end compression bolt assembly, and a support beam, all working in concert. The bipolar membrane stack is stacked between the right end plate, partition, and left end plate. The double-end compression bolt assembly ensures that the bipolar membrane stack is tightly compressed between the right end plate and partition, and between the left end plate and partition. The support beam further enhances the structural strength of the right end plate, partition, and left end plate. This stacking installation method achieves a tight bond between the membrane stacks, ensuring that each membrane layer is uniformly compressed. The pressure applied by the double-ended compression bolts effectively overcomes the uneven stress problem of membrane stacks with large thickness or complex structures, avoiding leakage or poor ion conduction caused by local loosening or gaps, thus ensuring the sealing performance of the membrane stack and reducing possible liquid leakage during operation. Secondly, the use of diaphragms and support beams enhances the structural strength, disperses the stress concentration caused by clamping force and operating load, reduces diaphragm damage or deformation caused by excessive local stress, and the support beams not only provide rigid support, but also improve the bending and vibration resistance of the entire device. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0013] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0014] Figure 4 This is a schematic diagram of the upper and lower isometric isometric solid structure of this utility model.

[0015] In the diagram: 1. Right end plate; 2. Left end plate; 3. Partition plate; 4. Double-ended compression bolt assembly; 401. U-shaped notch; 402. Bidirectional threaded post; 403. Nut; 5. Bipolar membrane stack; 6. I-shaped hollow pipe; 7. External threaded pin; 8. Support beam. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0017] Please see Figure 1-4 An embodiment of this utility model provides a compact electrodialysis device, including a right end plate 1, a partition 3 disposed on one side of the right end plate 1, and a left end plate 2 disposed on the side of the partition 3 away from the right end plate 1. Bipolar membrane stacks 5 are installed between the right end plate 1 and the partition 3, and between the left end plate 2 and the partition 3. A plurality of double-ended compression bolt groups 4 for tightening the bipolar membrane stacks 5 are installed on the front and rear outer walls of the right end plate 1, the left end plate 2, and the partition 3. A support beam 8 is installed at the upper end of the right end plate 1, the left end plate 2, and the partition 3.

[0018] The right end plate 1 and the left end plate 2 provide robust boundary support to prevent the bipolar membrane stack 5 from shifting or deforming during operation, thereby ensuring the stability of the ion conduction path.

[0019] I-shaped hollow pipes 6 are installed on the outer walls of the right end plate 1 and the left end plate 2, and several external threaded pins 7 that penetrate to the outside of the flange of the I-shaped hollow pipe 6 are installed on the outer walls of the right end plate 1 and the left end plate 2.

[0020] The I-shaped hollow pipe 6 is used to introduce external liquid into the bipolar membrane stack 5. The bipolar membrane stack 5 has the ability to selectively permeate specific ions, which can effectively separate different ions and improve electrolysis efficiency.

[0021] A rectangular notch is provided at the bottom of the partition plate 3. Rectangular cavities are provided on the opposite outer walls of the right end plate 1 and the left end plate 2. Square beams are installed in the rectangular notch and rectangular cavities. The square beams and support beams 8 can improve the overall stress state of the structure, improve the vibration and impact resistance of the equipment, and ensure stable operation under complex working conditions.

[0022] The double-ended compression bolt assembly 4 includes U-shaped notches 401 on the front and rear outer walls of the right end plate 1, left end plate 2, and partition 3, and bidirectional threaded posts 402 installed between the three U-shaped notches 401 in the same horizontal direction. Nuts 403 are installed at both ends of the bidirectional threaded posts 402. The bidirectional threaded posts 402 are embedded into the U-shaped notches 401 of the right end plate 1, partition 3, and left end plate 2, and the nuts 403 are used to continuously tighten the right end plate 1 and left end plate 2 towards the partition 3 to allow uniform pressure to be applied, avoid local loosening or displacement, and prevent leakage or performance degradation.

[0023] Two central protrusions are installed on both sides of the surface of the right end plate 1, left end plate 2, and partition 3. Countersunk holes concentric with the central protrusions are installed on the back of the right end plate 1, left end plate 2, and partition 3. The right end plate 1, left end plate 2, and partition 3 can be connected and assembled in the Y-axis direction through the countersunk holes and central protrusions.

[0024] In this embodiment, the bipolar membrane stack 5 is first installed between the right end plate 1 and the partition 3, and between the left end plate 2 and the partition 3. During this process, it is necessary to ensure that the layers of the membranes in the bipolar membrane stack 5 are neat and parallel to avoid affecting the overall sealing performance due to deviation. Then, multiple pre-prepared double-end compression bolt groups 4 are passed through the right end plate 1, the left end plate 2, and the partition 3, and the double-end compression bolt groups 4 are tightened one by one. During the operation, it is ensured that the clamping force is evenly distributed to avoid local overtightness or looseness, and the clamping status is checked to ensure that the membrane stack has not shifted or deformed. The support beam 8 is installed through the upper end of the right end plate 1, the left end plate 2, and the partition 3 to enhance the structural strength of the entire frame. Then, the overall fastening and testing are carried out, and all double-end compression bolt groups 4 are tightened step by step to ensure that each connection point meets the designed clamping requirements. The flatness, sealing performance, and uniformity of the clamping force of the membrane stack are checked.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A compact electrodialysis apparatus, characterized by: The device includes a right end plate (1), a partition (3) on one side of the right end plate (1), and a left end plate (2) on the side of the partition (3) away from the right end plate (1). Bipolar membrane stacks (5) are installed between the right end plate (1) and the partition (3) and between the left end plate (2) and the partition (3). Several double-ended compression bolt groups (4) for tightening the bipolar membrane stacks (5) are installed on the front and rear outer walls of the right end plate (1), the left end plate (2), and the partition (3). A support beam (8) is installed on the upper end of the right end plate (1), the left end plate (2), and the partition (3).

2. A compact electrodialysis unit according to claim 1, characterized in that: I-shaped hollow pipes (6) are installed on the outer walls of the right end plate (1) and the left end plate (2), which are far apart from each other.

3. A compact electrodialysis unit according to claim 2, characterized in that: Several threaded pins (7) that penetrate to the outside of the flange of the I-shaped hollow pipe (6) are installed on the outer walls of the right end plate (1) and the left end plate (2) respectively.

4. A compact electrodialysis unit according to claim 1, characterized in that: The bottom end of the partition (3) is provided with a rectangular notch, and the opposite outer walls of the right end plate (1) and the left end plate (2) are provided with rectangular cavities, and square beams are installed in the rectangular notch and rectangular cavities.

5. A compact electrodialysis unit according to claim 1, characterized in that: The double-ended compression bolt assembly (4) includes U-shaped notches (401) set on the front and rear outer walls of the right end plate (1), left end plate (2), and partition (3), and bidirectional threaded columns (402) installed between the three U-shaped notches (401) in the same horizontal direction, with nuts (403) installed at both ends of the bidirectional threaded columns (402).

6. A compact electrodialysis unit according to claim 1, characterized in that: Two central protrusions are installed on both sides of the surface of the right end plate (1), left end plate (2), and partition plate (3), and countersunk holes concentric with the central protrusions are installed on the back of the right end plate (1), left end plate (2), and partition plate (3).

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