CN219363350U

CN219363350U - Electrodialysis separator structure

Info

Publication number: CN219363350U
Application number: CN202320561446.6U
Authority: CN
Inventors: 徐叶飞; 刘杨; 苏勇
Original assignee: Sichuan Zhongqing Ruike New Energy Technology Co ltd
Current assignee: Sichuan Zhongqing Ruike Technology Group Co ltd
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-07-18
Anticipated expiration: 2033-03-21

Abstract

The application discloses electrodialysis baffle structure, include as the bulkhead of major structure, the bulkhead is hollow both ends opening structure setting, and the bulkhead both ends face can be dismantled respectively and is connected with first pressing mechanism and second pressing structure, the bulkhead with the pressfitting has the anion membrane between the first pressing mechanism, the bulkhead with the pressfitting has the cation membrane between the second pressing mechanism. The utility model integrates the concentrated water chamber in the partition plate structure, can realize the discharge of the concentrated water by maximally utilizing the injection of the concentrated water, and can realize the complete discharge of the concentrated water and then the injection of the concentrated water under the supporting action of the compression-resistant cage, thereby maximally avoiding the problem of the mixed discharge of the raw water caused by the replacement process of the concentrated water and further increasing the volume of the concentrated water.

Description

Electrodialysis separator structure

Technical Field

The utility model relates to the technical field of electrodialysis sewage treatment, in particular to an electrodialysis sewage treatment tank technology, and specifically relates to an electrodialysis partition plate structure arranged in an electrodialysis tank.

Background

Electrodialysis is a combination of electrochemical and dialysis diffusion processes; under the drive of an externally applied direct current electric field, the selective permeability of the ion exchange membrane (namely cations can permeate the cation exchange membrane and anions can permeate the anion exchange membrane) is utilized, and the anions and the cations respectively move to the anode and the cathode. In the ion migration process, if the fixed charge of the membrane is opposite to the charge of the ions, the ions can pass through; if the charges of the ions are the same, the ions are repelled, so that the purposes of solution desalination, concentration, refining or purification and the like are realized, and the technology is a mature technology applied in industry.

The sewage treated by electrodialysis can generate three kinds of water, namely fresh water, concentrated water and extreme water; the fresh water is water which does not contain negative anions and metal cations basically, is an ideal object for sewage treatment, the concentrated water is sewage with high concentration of anions and cations, the polar water is water with a large amount of anions and little cations or a large amount of cations and little anions, and the polar water and the concentrated water are not ideal objects for sewage treatment, and chemical treatments such as oxidation, reduction, replacement and the like are carried out before harmless emission. In view of this, when the same sewage is treated, the higher the ratio of the fresh water amount generated, the smaller the ratio of the concentrated water amount to the extremely water amount, and the lower the pressure for the subsequent treatment of the concentrated water amount and the extremely water amount.

In the existing electrodialysis tank, a plurality of chambers are formed in the electrodialysis tank at intervals through the interval installation of the anion membrane and the cation membrane, and a desalting chamber and a concentrating chamber are formed after positive and negative electrodes are externally added at two ends of the electrodialysis tank, so that the aim of sewage desalting treatment is fulfilled; however, in the prior art, a large amount of concentrated water is generated during the continuous dialysis treatment of sewage, which makes the workload of subsequent concentrated water and polar water treatment larger after electrodialysis. Therefore, the utility model provides a pertinence improvement has been carried out to current electrodialysis groove for improve fresh water duty, reduce dense water duty, thereby alleviate the follow-up pressure to dense water and extremely water treatment of sewage, reduce treatment cost, promote treatment efficiency.

Disclosure of Invention

In order to further reduce the concentrated water ratio after utilizing electrodialysis to handle sewage among the prior art, this application provides an electrodialysis baffle structure after the improvement, it is through integrating anion membrane and cation membrane simultaneously, can naturally form a plurality of desalination rooms and concentrated room through installing electrodialysis baffle structure in the electrodialysis groove, because the electrodialysis baffle structure that provides in this application has integrated anion membrane and cation membrane simultaneously, then make the vast majority space in the electrodialysis groove all will become the desalination room, concentrated room then is located electrodialysis baffle structure inside, in this way, need not to carry out interval arrangement to anion membrane and cation membrane, only need with the electrodialysis baffle structure that this application provided reliably install in the electrodialysis groove can. Because the axial span of the electrodialysis separation plate structure is smaller, the concentration of ions in the concentrated sewage is high, the concentrated water is small, the duty ratio of the concentrated water generated after the sewage is treated in unit volume can be effectively reduced, and the subsequent treatment pressure is reduced; meanwhile, the capacity of a device for temporarily storing the concentrated water for sewage treatment enterprises can be reduced, and the treatment cost is saved. On the other hand, as the proportion of the concentrated water is reduced, the concentration content of particles is higher, the subsequent refining or replacement treatment can be more effectively carried out, and the cost of harmless treatment of the concentrated water is reduced.

In order to achieve the above purpose, the technical scheme adopted in the application is as follows:

the electrodialysis partition plate structure comprises a partition plate which is used as a main body structure, wherein the partition plate is arranged in a hollow structure with two open ends, a first pressing mechanism and a second pressing mechanism are detachably connected to two end faces of the partition plate respectively, an anion membrane is pressed between the partition plate and the first pressing mechanism, and a cation membrane is pressed between the partition plate and the second pressing mechanism.

In order to obtain high-concentration concentrated water, particle diffusion is avoided, preferably, the inner wall of the bulkhead, the anionic membrane and the cationic membrane are surrounded to form a closed cavity.

In order to facilitate the replacement of the concentrated water, it is preferable that a water inlet pipe for injecting fresh water into the cavity and a water outlet pipe for discharging the concentrated water formed by electrodialysis in the cavity are respectively arranged on the partition frame.

In order to increase the replacement ratio of the concentrated water, the problem that the injected raw water is discharged together with the concentrated water to increase the concentrated water is avoided, preferably, the water inlet pipe is positioned at the top of the bulkhead, and the water outlet pipe is arranged at the bottom of the bulkhead or at the top of the bulkhead and extends downwards to a position in the cavity close to the inner bottom of the bulkhead.

In order to improve the strength of the separator structure and reduce the excessive compression of the anion membrane and the cation membrane caused by the pressure reduction in the separator frame due to the discharge of the concentrated water in the concentrated water replacement process, the separator structure preferably further comprises a compression-resistant cage which is arranged in the separator frame and is positioned between the anion membrane and the cation membrane and used for supporting the anion membrane and the cation membrane.

Further preferably, the compression-resistant cage comprises a cage framework, and at least a first supporting net and a second supporting net which cover the cage framework and are close to two sides of the anion membrane and the cation membrane are wrapped.

In order to facilitate the installation and replacement of the anion membrane and the cation membrane, preferably, the bulkhead comprises a frame body which is arranged in a symmetrical structure, steps are arranged on any side of the frame body along the outer edge, one side of the steps, which is close to the axis of the frame body, extends outwards along the axial direction to form a boss for abutting against and attaching to the anion membrane or the cation membrane, one side of the steps, which is close to the frame body, is provided with a plane surrounding the edge of the frame body, and a plurality of clamping holes are arranged on one side, which is close to the boss, of the plane;

the first pressing structure and the second pressing structure are respectively provided with a first clamp and a second clamp which are used for being clamped with a plurality of clamping holes, and the boss is provided with an arc-shaped surface used for being attached to the anion membrane and/or the cation membrane;

when the frame body is respectively clamped with the first pressing structure and the second pressing structure and presses the anion membrane and the cation membrane on the arc-shaped surface, the inner wall of the frame body, the anion membrane and the cation membrane are surrounded to form a closed cavity, and the closed cavity is in a closed state.

The beneficial effects are that:

1. according to the utility model, the anionic membrane and the cationic membrane are integrated on the electrodialysis partition plate structure, so that the modular installation of the electrodialysis tank can be realized, the electrodialysis device can be suitable for the application of sewage electrodialysis in different application scenes, and the size of the fresh water chamber can be flexibly adjusted through the density layout of the electrodialysis partition plate structure.

2. The utility model integrates the concentrated water chamber in the partition plate structure, can realize the discharge of the concentrated water by maximally utilizing the injection of the concentrated water, and can realize the complete discharge of the concentrated water and then the injection of the concentrated water under the supporting action of the compression-resistant cage, thereby maximally avoiding the problem of the mixed discharge of the raw water caused by the replacement process of the concentrated water and further increasing the volume of the concentrated water.

3. The utility model can realize the later improvement of the existing electrodialysis tank, has good practicability and compatibility, and realizes the upgrading of low-cost equipment.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.

Figure 1 is a schematic diagram of the operation of the present application in an electrodialysis cell.

Fig. 2 is an exploded view of a structure according to an embodiment of the present application.

Fig. 3 is an enlarged view of the structure of the region a in fig. 2.

Fig. 4 is an enlarged view of the structure of the region B in fig. 2.

Fig. 5 is an enlarged view of the structure of the region C in fig. 2.

Fig. 6 shows one embodiment of the former.

Figure 7 is an isometric view of another embodiment of a former.

Fig. 8 is a front view of the internal structure of fig. 7.

In the figure: 1-a first lamination structure; 2-a first clip; 3-anionic membrane; 4-compression-resistant cages; 41-cage framework; 42-a first support net; 43-a second support net; 5-a spacer; 51-a frame body; 52-steps; 53-boss; 54-arc surface; 55-clamping holes; 56-ribs; 57-water inlet pipe; 58-draining pipe; 6-cationic membrane; 7-a second lamination structure; 71-laminating a frame; 72-second clip.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, which are generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present application, it should be noted that, if the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship that a product of the application conventionally puts in use, it is merely for convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like in the description of the present application, if any, are used for distinguishing between the descriptions and not necessarily for indicating or implying a relative importance.

Furthermore, the terms "horizontal," "vertical," and the like in the description of the present application, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

Example 1:

referring to the electrodialysis partition plate structure shown in the attached drawings 1 and 2 of the specification, the electrodialysis partition plate structure comprises a partition plate 5 serving as a main structure, wherein the partition plate 5 is arranged in a hollow structure with two open ends, two end faces of the partition plate 5 are respectively detachably connected with a first pressing mechanism 1 and a second pressing mechanism 7, an anion membrane 3 is pressed between the partition plate 5 and the first pressing mechanism 1, and a cation membrane 6 is pressed between the partition plate 5 and the second pressing mechanism 7.

Structure and working principle are described:

firstly, the principle of implementing sewage desalination and concentration by electrodialysis is consistent with that of the prior electrodialysis, and the aim is to structurally improve the electrodialysis so as to further reduce the proportion of concentrated water compared with the prior art after the sewage raw water in unit volume is treated. Secondly, the difficulty of the anion membrane 3 and the cation membrane 6 in the later operation and maintenance and replacement process is reduced.

Referring to fig. 1, a compartment space formed by two adjacent electrodialysis separation plate structures in the drawing is a desalination chamber 100, an inner cavity of each electrodialysis separation plate structure is a concentration chamber 200, and positive and negative ions in sewage raw water are directionally moved in an electric field formed by positive and negative electrodes and finally converged into the concentration chamber 200, namely, in a separation frame 5. When the desalination/concentration time is reached according to the treatment standard, all electrodialysis partition plate structures can be taken out, any one of the first pressing mechanism 1 and/or the second pressing mechanism 7 is opened to discharge concentrated water into a designated temporary storage pool for reinstallation, the treated fresh water is discharged, raw water is added again, and the second electrodialysis treatment is performed. In order to improve the convenience of raw water addition, after raw water is added into the electrodialysis tank, the bulkhead 5 can be completely placed in the electrodialysis tank to install the first pressing mechanism 1 and/or the second pressing mechanism 7, so that the bulkhead 5 is installed, and untreated sewage raw water is naturally contained in the bulkhead.

Example 2:

in this embodiment, further optimization is performed on the basis of embodiment 1, and in order to obtain high-concentration concentrated water, as shown in fig. 1-8 of the specification, the inner wall of the partition frame 5, the anion membrane 3 and the cation membrane 6 are surrounded to form a closed cavity.

In order to facilitate the replacement of the concentrate, the formers 5 are each provided with a water inlet pipe 57 for the injection of fresh water into the cavity and a water outlet pipe 58 for the discharge of concentrate formed by electrodialysis in the cavity.

In order to increase the ratio of the replacement of the concentrate, and avoid the problem that the injected raw water is discharged together with the concentrate to increase the concentrate, it is preferable that the water inlet pipe 57 is located at the top of the bulkhead 5, and the water outlet pipe 58 is disposed at the bottom of the bulkhead 5 or at the top of the bulkhead 5 and extends downward to a position in the cavity near the inner bottom of the bulkhead 5.

First, an operation mode will be described with respect to the installation modes of the water inlet pipe 57 and the water outlet pipe 58 shown in fig. 2 and 6. As shown in fig. 2 and 6, the water inlet pipe 57 is positioned at the top, the water outlet pipe 58 is positioned at the bottom, and after electrodialysis is completed, the concentrated water can be extruded from the water outlet pipe 58 by the way that the water inlet pipe 57 is introduced into the raw water, or the raw water is sucked from the water inlet pipe 57 by opening the water outlet pipe 58 using the natural discharge of the concentrated water. The mode is more suitable to depend on whether a pressurizing mechanism exists or whether a mounting fall exists in the equipment mounting condition of an actual application site, but no matter the mode is adopted, the problem that the concentrated water volume is increased due to the fact that the concentrated water is discharged from the bottom based on the principle that the concentrated water density is larger than the raw water density can be solved, and the raw water enters from the top can be reduced to the greatest extent. However, it should be noted that the drainage of the concentrated water needs to be performed by a pipeline penetrating through the electrodialysis tank shell, otherwise the structure cannot be adopted. When the bottom of the electrodialysis tank does not have a drainage condition, and the existing structure is not convenient for realizing low-cost transformation, the following scheme can be adopted.

Secondly, in the case that the above-mentioned drainage scheme is not feasible, the structure as shown in fig. 7 and 8 may be adopted, that is, the price drain pipe 58 is also arranged at the top of the bulkhead 5, but its end extends to the inner bottom in a consistent way through the bulkhead 5, so that the concentrated water at the bottom is always pumped out and gradually replaced by the raw water, and this structural improvement can effectively solve the problem that the electrodialysis tank cannot drain water.

In order to improve the strength of the separator structure and reduce the excessive compression of the anion membrane 3 and the cation membrane 6 caused by the pressure reduction in the separator frame 5 due to the discharge of the concentrated water in the process of replacing the concentrated water, the separator further comprises a compression-resistant cage 4 which is arranged in the separator frame 5 and is positioned between the anion membrane 3 and the cation membrane 6 and used for supporting the anion membrane 3 and the cation membrane 6. The compression-resistant cage 4 comprises a cage framework 41, and at least a first support net 42 and a second support net 43 which cover the two sides of the cage framework 41 close to the anion membrane 3 and the cation membrane 6 are wrapped. For the case of discontinuous concentrated water drainage, the concentrated water can be drained in advance through the drain pipe 58, and then the drain pipe 58 is closed, and the concentrated water is not increased in volume by the water inlet pipe 57 such as raw water, which is usually used for an electrodialysis tank capable of draining water downwards; but has the disadvantage that fresh water must be discharged in advance, otherwise the anion membrane 3 and the cation membrane 6 are subjected to a large pressure difference. However, since the volume of fresh water is large and the discharging time is long, this will lead to a reduction in working efficiency, and in order to avoid this problem, in this embodiment, by adding the compression cage 4 in the bulkhead 5, the anion membrane 3 and the cation membrane 6 can be avoided to bear the pressure difference, and the fresh water/concentrated water discharging can be performed at any time, so that the two are not interfered and affected, the water changing efficiency can be improved, and the continuity of electrodialysis treatment can be improved.

Example 3:

in order to facilitate the installation and replacement of the anion membrane 3 and the cation membrane 6, as shown in fig. 2-5, the bulkhead 5 comprises a frame body 51 which is arranged in a symmetrical structure, steps 52 are arranged on either side of the frame body 51 along the outer edge, the side, close to the axle center of the frame body 51, of the steps 52 extends outwards along the axial direction to form a boss 53 for abutting against and attaching to the anion membrane 3 or the cation membrane 6, a plane surrounding the edge of the frame body 51 is arranged on the side, close to the frame body 51, of the steps 52, and a plurality of clamping holes 55 are arranged on the side, close to the boss 53, of the plane;

the first pressing structure 1 and the second pressing structure 7 are respectively provided with a first clip 2 and a second clip 72 which are used for being clamped with a plurality of clamping holes 55, and the boss 53 is provided with an arc-shaped surface 54 used for being attached to the anion membrane 3 and/or the cation membrane 6;

when the frame body 51 is respectively clamped with the first pressing structure 1 and the second pressing structure 7 and presses the anion membrane 3 and the cation membrane 6 on the arc-shaped surface 54, the inner wall of the frame body 51, the anion membrane 3 and the cation membrane 6 form a closed cavity in a closed state.

The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. Electrodialysis baffle structure, including as the bulkhead (5) of major structure, its characterized in that: the separation frame (5) is in a hollow structure with two open ends, two end faces of the separation frame (5) are respectively detachably connected with a first pressing structure (1) and a second pressing structure (7), an anion membrane (3) is pressed between the separation frame (5) and the first pressing structure (1), and a cation membrane (6) is pressed between the separation frame (5) and the second pressing structure (7).

2. The electrodialysis spacer structure according to claim 1, wherein: the inner wall of the bulkhead (5), the anionic membrane (3) and the cationic membrane (6) are surrounded to form a closed cavity.

3. The electrodialysis spacer structure according to claim 2, wherein: the bulkhead (5) is respectively provided with a water inlet pipe (57) for injecting fresh water into the cavity and a water outlet pipe (58) for discharging concentrated water formed by electrodialysis in the cavity.

4. An electrodialysis spacer structure according to claim 3, wherein: the water inlet pipe (57) is arranged at the top of the bulkhead (5), and the water outlet pipe (58) is arranged at the bottom of the bulkhead (5) or arranged at the top of the bulkhead (5) and extends downwards to a position in the cavity, which is close to the inner bottom of the bulkhead (5).

5. The electrodialysis spacer structure according to any one of claims 1-4, wherein: the pressure-resistant cage (4) is arranged in the bulkhead (5) and positioned between the anion membrane (3) and the cation membrane (6) and used for supporting the anion membrane (3) and the cation membrane (6).

6. The electrodialysis spacer structure according to claim 5, wherein: the compression-resistant cage (4) comprises a cage framework (41), and at least a first supporting net (42) and a second supporting net (43) which cover the cage framework (41) and are close to two sides of the anion membrane (3) and the cation membrane (6) are wrapped.

7. The electrodialysis spacer structure according to any one of claims 1-4, wherein: the separation frame (5) comprises a frame body (51) which is arranged in a symmetrical structure, steps (52) are arranged on any side of the frame body (51) along the outer edge, a boss (53) which is used for being abutted against and attached to an anion membrane (3) or a cation membrane (6) is formed by extending one side of the steps (52) close to the axis of the frame body (51) outwards along the axial direction, a plane which surrounds the edge of the frame body (51) is arranged on one side of the steps (52) close to the frame body (51), and a plurality of clamping holes (55) are formed on one side of the plane close to the boss (53);

the first lamination structure (1) and the second lamination structure (7) are respectively provided with a first clamp (2) and a second clamp (72) which are used for being clamped with a plurality of clamping holes (55), and the boss (53) is provided with an arc-shaped surface (54) used for being attached to the anion membrane (3) and/or the cation membrane (6);

when the frame body (51) is respectively clamped with the first pressing structure (1) and the second pressing structure (7) and presses the anion membrane (3) and the cation membrane (6) on the arc-shaped surface (54), the inner wall of the frame body (51), the anion membrane (3) and the cation membrane (6) are surrounded to form a closed cavity, and the closed cavity is in a closed state.