Exchange membrane structure of electrodialysis type water treatment device

Abstract

The utility model discloses an exchange membrane structure of an electrodialysis type water treatment device, which relates to the technical field of electrodialysis type water treatment, and comprises an exchange membrane main body for the electrodialysis type water treatment device, and a filter membrane for filtering impurities in water, the number of the filtering membranes is two, and the two filtering membranes are arranged on the two surfaces of the exchange membrane main body; the mounting rack is sleeved on the filter membrane and the exchange membrane main body, a fixing frame is detachably arranged on the surface of the mounting rack, and the fixing frame is used for fixing the filter membrane and the exchange membrane main body in the mounting rack. According to the utility model, the filter membrane is arranged on the exchange membrane, so that the influence of pollutants on the exchange membrane can be reduced, and the problems that the exchange membrane is easily influenced by impurities and pollutants in water, the migration speed of ions can be slowed down due to accumulation of the pollutants, and the performance of the exchange membrane is reduced are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrodialysis water treatment, in particular to an exchange membrane structure of an electrodialysis water treatment device. Background Art

[0002] Electrodialysis water treatment technology is a membrane separation technology that relies on an external electric field to generate an electric field force to drive the movement of solution ions, and utilizes the selective permeability of ion exchange membranes to separate salt ions from solvent water molecules, thereby achieving desalination and purification of saline water bodies. Electrodialysis water treatment devices are usually composed of water distribution plates, ion exchange membranes, electrodes, and other main components. For example, water distribution plates, anion exchange membranes (anion membranes) and cation exchange membranes (cation membranes) are alternately arranged between the positive electrode and the negative electrode to form a multilayer compartment. Under the action of the external electric field between the positive and negative electrodes, the anions and cations in the aqueous solution entering the compartment will migrate to the anode and cathode respectively. Since the cation membrane only allows cations to pass and prevents anions from passing, and the anion membrane only allows anions to pass and prevents cations from passing (that is, if the fixed charge on the ion exchange membrane is opposite to the charge of the ion, the ion can pass, and if their charges are the same, the ion is repelled), the anions and cations in the dilute chamber migrate to the adjacent concentrated chamber, thereby desalinating the salt water.

[0003] At present, when ion exchange membranes are in use, since there may be impurities and pollutants in the water, the exchange membranes are easily affected by the impurities and pollutants in the water. The accumulation of pollutants will slow down the migration speed of ions and reduce the performance of the exchange membranes. Utility Model Content

[0004] The utility model provides an exchange membrane structure of an electrodialysis water treatment device, which has the advantage of being able to reduce the influence of pollutants on the exchange membrane by installing a filter membrane on the exchange membrane, so as to solve the problem that the exchange membrane is easily affected by impurities and pollutants in water, and the accumulation of pollutants will slow down the migration speed of ions, causing the performance of the exchange membrane to decline.

[0005] In order to achieve the purpose of reducing the influence of pollutants on the exchange membrane by installing a filter membrane on the exchange membrane, the utility model provides the following technical solutions: an exchange membrane structure of an electrodialysis water treatment device, including an exchange membrane body for the electrodialysis water treatment device, and also including: a filter membrane for filtering impurities in water, two of the filter membranes are provided, and the two filter membranes are arranged on both sides of the exchange membrane body; a mounting frame sleeved on the filter membrane and the exchange membrane body, a fixing frame is detachably provided on the surface of the mounting frame, and the fixing frame is used to fix the filter membrane and the exchange membrane body in the mounting frame.

[0006] As a preferred technical solution of the utility model, the filter membrane includes a non-woven fabric and a nanofiber filter layer, one side of the nanofiber filter layer is fixedly arranged on one side of the non-woven fabric, and the other side of the nanofiber filter layer is movably connected to the exchange membrane body.

[0007] As a preferred technical solution of the utility model, a stainless steel metal fiber layer is fixedly provided on one side of the non-woven fabric away from the nanofiber filter layer, and the stainless steel metal fiber layer is used to resist water pressure shock.

[0008] As a preferred technical solution of the utility model, the mounting frame includes a placement frame and an outer shell frame, the outer shell frame is fixedly arranged on the surface of the placement frame, the fixing frame is arranged at the other end of the outer shell frame, and the outer shell frame is connected to the fixing frame by fastening bolts; one of the filter membranes is connected to the placement frame, and the other filter membrane is connected to the fixing frame, the fastening bolts filter the membrane and the exchange membrane body, and a positioning component is arranged on the surface of the placement frame.

[0009] As a preferred technical solution of the utility model, the positioning assembly includes multiple positioning rods and limiting rings, the multiple positioning rods are respectively fixed on the four sides of the placement frame, the limiting rings are fixedly sleeved on the top ends of the positioning rods, the limiting rings are adapted to the number of positioning rods, the limiting rings are elastic, and the four sides of the filter membrane and the exchange membrane body are respectively sleeved on the multiple positioning rods.

[0010] As a preferred technical solution of the utility model, a first corrugated plate is fixedly provided on the surface of the placement frame, and a second corrugated plate is fixedly provided on the surface of the fixing frame. The first corrugated plate is cross-engaged with the second corrugated plate, and the two filter membranes are tightly fitted with the first corrugated plate and the second corrugated plate respectively.

[0011] As a preferred technical solution of the utility model, both sides of the fixed frame are fixedly provided with a toggle part, and both sides of the outer shell frame are provided with grooves adapted to the toggle part.

[0012] Compared with the prior art, the utility model provides an exchange membrane structure of an electrodialysis water treatment device, which has the following beneficial effects:

[0013] 1. The exchange membrane structure of the electrodialysis water treatment device is provided with a filter membrane. When water flows through the exchange membrane body, the non-woven fabric and nanofiber filter layers on both sides of the exchange membrane body will filter impurities in the water. The nanofiber filter layer can improve the filtering effect on pollutants, thereby achieving the advantage of reducing the influence of pollutants on the exchange membrane by installing a filter membrane on the exchange membrane, and solving the problem that the exchange membrane is easily affected by impurities and pollutants in the water, and the accumulation of pollutants will slow down the migration speed of ions, causing the performance of the exchange membrane to decline.

[0014] 2. The exchange membrane structure of the electrodialysis water treatment device is provided with a stainless steel metal fiber layer. The stainless steel metal fiber layer is a cloth woven from stainless steel metal fibers and has high tensile strength. The stainless steel metal fiber layer is arranged on the outer surface of the non-woven fabric to resist the impact of water flow, reduce the impact on the filter membrane, and reduce the risk of damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is an exploded diagram of the filter membrane structure of the utility model;

[0017] Figure 3 This is a partial structural diagram of the mounting frame of the utility model;

[0018] Figure 4 For this utility model Figure 3 A magnified view of the structure at center;

[0019] Figure 5 This is a schematic diagram of the fixed frame structure of the utility model;

[0020] Figure 6 This is a partial structural schematic diagram of the filter membrane of the utility model.

[0021] In the figure: 1. exchange membrane body; 2. filter membrane; 201. non-woven fabric; 202. nanofiber filter layer; 3. mounting frame; 301. placement frame; 302. outer shell frame; 4. fixing frame; 5. stainless steel metal fiber layer; 6. fastening bolts; 7. positioning rod; 8. limiting ring; 9. first corrugated plate; 10. second corrugated plate; 11. toggle part. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-Figure 6The utility model discloses an exchange membrane structure of an electrodialysis water treatment device, including an exchange membrane body 1 for the electrodialysis water treatment device, and also includes: a filter membrane 2 for filtering impurities in water, two filter membranes 2 are provided, and the two filter membranes 2 are arranged on both sides of the exchange membrane body 1; a mounting frame 3 sleeved on the filter membrane 2 and the exchange membrane body 1, and a fixing frame 4 is detachably provided on the surface of the mounting frame 3, and the fixing frame 4 is used to fix the filter membrane 2 and the exchange membrane body 1 in the mounting frame 3.

[0024] Specifically, the filter membrane 2 includes a non-woven fabric 201 and a nanofiber filter layer 202 , one side of the nanofiber filter layer 202 is fixedly disposed on one side of the non-woven fabric 201 , and the other side of the nanofiber filter layer 202 is movably connected to the exchange membrane body 1 .

[0025] In this embodiment, the nanofiber filter layer 202 is imitated on the non-woven fabric 201. When water flows through the exchange membrane body 1, the non-woven fabric 201 and the nanofiber filter layer 202 on both sides of the exchange membrane body 1 will filter impurities in the water. The nanofiber filter layer 202 can improve the filtering effect of pollutants and reduce pollution to the exchange membrane body 1.

[0026] Specifically, a stainless steel metal fiber layer 5 is fixedly disposed on one side of the non-woven fabric 201 away from the nanofiber filter layer 202 , and the stainless steel metal fiber layer 5 is used to resist water pressure shock.

[0027] In this embodiment, the stainless steel metal fiber layer 5 is a cloth woven from stainless steel metal fibers with high tensile strength. The stainless steel metal fiber layer 5 is arranged on the outer surface of the non-woven fabric 201 to resist the impact of water flow, reduce the impact on the filter membrane 2, and reduce the risk of damage.

[0028] Specifically, the mounting frame 3 includes a placement frame 301 and an outer shell frame 302. The outer shell frame 302 is fixedly arranged on the surface of the placement frame 301. The fixed frame 4 is arranged at the other end of the outer shell frame 302. The outer shell frame 302 is connected to the fixed frame 4 by fastening bolts 6. One of the filter membranes 2 is connected to the placement frame 301, and the other filter membrane 2 is connected to the fixed frame 4. The fastening bolts 6 fasten the filter membrane 2 and the exchange membrane body 1. A positioning component is arranged on the surface of the placement frame 301.

[0029] In this embodiment, the exchange membrane body 1 and the two filter membranes 2 are placed in the outer shell frame 302, so that the two filter membranes 2 are placed on both sides of the exchange membrane body 1, and one of the filter membranes 2 is placed on the placement frame 301, and then the fixed frame 4 is placed in the outer shell frame 302, and then the fixed frame 4 is fastened to the placement frame 301 by tightening bolts 6, so that the fixed frame 4 clamps and fixes the exchange membrane body 1 and the filter membrane 2.

[0030] Specifically, the positioning assembly includes multiple positioning rods 7 and limiting rings 8. The multiple positioning rods 7 are respectively fixed on the four sides of the placement frame 301. The limiting rings 8 are fixedly sleeved on the top ends of the positioning rods 7. The number of limiting rings 8 is matched with that of the positioning rods 7. The limiting rings 8 are elastic. The filter membrane 2 and the exchange membrane body 1 are respectively sleeved on the multiple positioning rods 7.

[0031] In this embodiment, the exchange membrane body 1 and the two filter membranes 2 are placed in the outer shell frame 302. While placing them, the exchange membrane body 1 and the two filter membranes 2 are all sleeved on the positioning rod 7 on all sides, and the limiting ring 8 is passed through. The positioning rod 7 can position the exchange membrane body 1 and the two filter membranes 2 to facilitate subsequent fixation. The limiting ring 8 is made of rubber and can be limited on the positioning rod 7.

[0032] Specifically, a first corrugated plate 9 is fixedly disposed on the surface of the placement frame 301, and a second corrugated plate 10 is fixedly disposed on the surface of the fixing frame 4. The first corrugated plate 9 and the second corrugated plate 10 are cross-engaged, and the two filter membranes 2 are tightly fitted to the first corrugated plate 9 and the second corrugated plate 10 respectively.

[0033] In this embodiment, the fixed frame 4 is placed in the outer shell frame 302, and the second corrugated plate 10 on the fixed frame 4 is engaged with the first corrugated plate 9, which will squeeze the exchange membrane body 1 and the filter membrane 2 into a corrugated shape. By setting the first corrugated plate 9 and the second corrugated plate 10, the contact area with the filter membrane 2 can be increased, and the friction force can be increased, which plays an anti-slip role and makes the clamping more secure.

[0034] Specifically, the two sides of the fixed frame 4 are fixedly provided with the toggle parts 11 , and the two sides of the outer shell frame 302 are provided with grooves adapted to the toggle parts 11 .

[0035] In this embodiment, when taking the fixed frame 4 out of the outer shell frame 302 , the two toggle parts 11 are clamped by hand, and then the toggle parts 11 are pulled to drive the fixed frame 4 out, thereby facilitating the removal of the fixed frame 4 .

[0036] The working principle and use process of the utility model are as follows: when in use, the mounting frame 3 drives the exchange membrane body 1 to be placed in the electrodialysis water treatment device, and then the mounting frame 3 is fixed, and the anion exchange membrane and the cation exchange membrane are alternately arranged between the positive electrode and the negative electrode in sequence to form a multi-layer compartment. Under the action of the external electric field between the positive and negative electrodes, the anions and cations in the aqueous solution entering the compartment will migrate toward the anode and the cathode respectively. Since the cation membrane only allows cations to pass through and prevents anions from passing through, and the anion membrane only allows anions to pass through and prevents cations from passing through, the anions and cations in the dilute chamber migrate to the adjacent concentrated chamber, thereby desalinating the salt water. At the same time, when the water flows through the exchange membrane body 1, the non-woven fabric 201 and the nanofiber filter layer 202 on both sides of the exchange membrane body 1 will filter the impurities in the water to reduce the pollution to the exchange membrane body 1.

[0037] When the filter membrane 2 needs to be disassembled, first remove the mounting frame 3 from the electrodialysis water treatment device, then tighten the nut of the fastening bolt 6 to disengage the nut from the screw, then remove the screw, release the limit between the placement frame 301 and the fixing frame 4, then take out the fixing frame 4 from the outer shell frame 302, then take out the filter membrane 2 and the exchange membrane body 1 from the outer shell frame 302, clean or replace the filter membrane 2, then place the replaced filter membrane 2 into the outer shell frame 302, place the filter membrane 2 on the placement frame 301, then place the exchange membrane body 1, and then place another filter membrane 2 on the exchange membrane body 1, so that the exchange membrane body 1 is between the two filter membranes 2. While placing, The body 1 and the two filter membranes 2 are all sleeved on the positioning rod 7 on all sides and penetrate the limiting ring 8 at the same time. The positioning rod 7 can position the exchange membrane body 1 and the two filter membranes 2 for subsequent fixation. The limiting ring 8 is made of rubber and can be limited on the positioning rod 7. Then the fixing frame 4 is placed in the outer shell frame 302. At the same time, the second corrugated plate 10 on the fixing frame 4 is engaged with the first corrugated plate 9, which will squeeze the exchange membrane body 1 and the filter membrane 2 into a corrugated shape. By setting the first corrugated plate 9 and the second corrugated plate 10, the contact area with the filter membrane 2 can be increased, and the friction force can be increased to play an anti-slip role and make the clamping more secure. Then the fixing frame 4 is fastened to the placement frame 301 by tightening the bolts 6.

[0038] In summary, the exchange membrane structure of the electrodialysis water treatment device, by providing the filter membrane 2, achieves the advantage of reducing the influence of pollutants on the exchange membrane by installing the filter membrane 2 on the exchange membrane, and solves the problem that the exchange membrane is easily affected by impurities and pollutants in the water, and the accumulation of pollutants will slow down the migration speed of ions, causing the performance of the exchange membrane to decline.

[0039] It should be noted that, in this article, terms such as "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0040] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An exchange membrane structure of an electrodialysis water treatment device, comprising an exchange membrane body (1) for an electrodialysis water treatment device, characterized in that: Also includes: A filter membrane (2) for filtering impurities in water, wherein two filter membranes (2) are provided, and the two filter membranes (2) are provided on two sides of the exchange membrane body (1); A mounting frame (3) is sleeved on a filter membrane (2) and an exchange membrane body (1), wherein a fixing frame (4) is detachably provided on the surface of the mounting frame (3), and the fixing frame (4) is used to fix the filter membrane (2) and the exchange membrane body (1) in the mounting frame (3).

2. The exchange membrane structure of an electrodialysis water treatment device according to claim 1, characterized in that: The filter membrane (2) comprises a non-woven fabric (201) and a nanofiber filter layer (202), one side of the nanofiber filter layer (202) is fixedly arranged on one side of the non-woven fabric (201), and the other side of the nanofiber filter layer (202) is movably connected to the exchange membrane body (1).

3. The exchange membrane structure of an electrodialysis water treatment device according to claim 2, characterized in that: A stainless steel metal fiber layer (5) is fixedly disposed on one side of the non-woven fabric (201) away from the nanofiber filter layer (202), and the stainless steel metal fiber layer (5) is used to resist water pressure shock.

4. The exchange membrane structure of an electrodialysis water treatment device according to claim 1, characterized in that: The mounting frame (3) comprises a placement frame (301) and an outer shell frame (302); the outer shell frame (302) is fixedly arranged on the surface of the placement frame (301); the fixing frame (4) is arranged at the other end of the outer shell frame (302); and the outer shell frame (302) is connected to the fixing frame (4) via fastening bolts (6); One of the filter membranes (2) is connected to a placement frame (301), and the other filter membrane (2) is connected to a fixing frame (4). The fastening bolts (6) fasten the filter membrane (2) and the exchange membrane body (1), and a positioning component is provided on the surface of the placement frame (301).

5. The exchange membrane structure of an electrodialysis water treatment device according to claim 4, characterized in that: The positioning assembly comprises a plurality of positioning rods (7) and a limiting ring (8), wherein the plurality of positioning rods (7) are respectively fixed on the four sides of the placement frame (301), and the limiting ring (8) is fixedly sleeved on the top of the positioning rod (7). The number of the limiting ring (8) matches that of the positioning rod (7), and the limiting ring (8) is elastic. The four sides of the filter membrane (2) and the exchange membrane body (1) are respectively sleeved on the plurality of positioning rods (7).

6. The exchange membrane structure of an electrodialysis water treatment device according to claim 4, characterized in that: A first corrugated plate (9) is fixedly arranged on the surface of the placement frame (301), and a second corrugated plate (10) is fixedly arranged on the surface of the fixing frame (4); the first corrugated plate (9) and the second corrugated plate (10) are cross-engaged, and the two filter membranes (2) are tightly fitted to the first corrugated plate (9) and the second corrugated plate (10), respectively.

7. The exchange membrane structure of an electrodialysis water treatment device according to claim 4, characterized in that: The two sides of the fixed frame (4) are fixedly provided with a toggle portion (11), and the two sides of the outer shell frame (302) are provided with grooves adapted to the toggle portion (11).

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