TWI740763B - Cassette type electrodialysis unit and module comprising the same - Google Patents

Abstract

A cassette type electrodialysis unit includes an accommodating box, a filter membrane group and a cover member. The accommodating box includes a membrane support, a membrane limiting wall and an accommodating opening. The membrane limiting wall is disposed on and surrounds the membrane support to form the accommodation opening. The filter membrane group is disposed on the membrane support and abuts an inner side of the membrane limiting wall. The filter membrane group includes a first ion exchange membrane, a second ion exchange membrane and a spacer disposed between the first ion exchange membrane and the second ion exchange membrane. The cover member is disposed on the accommodating box and includes an opening, a main body, and a pressing portion. The opening passes through the main body. A first side of the main body adjacent to the filter membrane group has a peripheral area and an inner area which is closer to the opening than the outer area, and the pressing portion is formed on the inner area.

Description

Cartridge type electrodialysis unit and module including the same

The present disclosure relates to an electrodialysis unit and a module including the same, and more particularly to a cassette type electrodialysis unit and a module including the same.

Electrodialysis (Electrodialysis, ED) technology is a membrane separation technology driven by an electric field for different purposes such as desalination, concentration and purification, so it is also called electrochemical desalination (ED). The electrodialysis system allows water to flow through alternately arranged anion and cation exchange membranes. Under the action of the DC electric field of the electrode plates, the anion and cations are driven to move to selectively permeate the anion and cation exchange membranes so that the anions and cations can be removed or Concentrated in another waterway to achieve the purpose of water purification.

The common electrodialysis technology uses a screw to penetrate all the anion and cation exchange membranes and electrode plates to press the anion and cation exchange membranes to prevent water from leaking out, but this pressing method will only produce point-like compression at the screw penetration. Stress, and each screw needs to be locked separately, it is prone to the problem of different screw tightness. Not only is it difficult to control and unify the screw's locking strength, but also because of such a difference in stress, the amount of overlap of the anion and cation exchange membranes is caused. If it is limited, it is more likely that the water tightness between the anion and cation exchange membranes in the central part is insufficient, resulting in the mixing of purified water and sewage, and the effect of electrodialysis cannot be exerted.

The common electrodialysis technology also has a pressure plate added to the outermost side, and the screw only penetrates the pressure plate, which solves the problem of uneven compression stress, but also because the anion and cation exchange membranes are not fixed by the screw, resulting in the anion and cation exchange membranes Many problems arise from the overlapping action. For example, when the size of the anion and cation exchange membranes is as large as 80cm╳160cm, deviations are likely to occur during the lamination process, which will increase the risk of mixing internal clean water and sewage. Or, when the number of anion and cation exchange membranes is large, not only the stacking action is quite time-consuming, but also the crane needs to be hoisted, and the assembly efficiency is very poor. In addition, if water leakage or assembly errors are discovered after the assembly is completed, they can only be disassembled and inspected, and then the assembly action should be repeated.

Therefore, there is still an urgent need to study an improved electrodialysis device to solve the above technical problems.

According to an embodiment of the present disclosure, a cassette type electrodialysis unit is provided. The cassette type electrodialysis unit includes an accommodating box body, a filter membrane group and a cover member. The accommodating box body includes a diaphragm bearing seat, a diaphragm limiting wall and an accommodating opening. The diaphragm limiting wall is arranged around the diaphragm bearing seat. The accommodating opening is formed between the diaphragm bearing seat and the diaphragm limiting wall. The filter membrane group is arranged on the membrane supporting seat and abuts against the inner side of the membrane limiting wall. The filter membrane set includes a plurality of first ion exchange membranes and a plurality of second ion exchange membranes alternately arranged; and a plurality of flow channel partitions. The flow channel separator is arranged between the first ion exchange membrane and the second ion exchange membrane. The cover member is disposed on the accommodating box body, and the cover member includes at least one opening, a body portion, and a pressing portion. At least one of the openings passes through the body portion, and the body portion is adjacent to a One side has a peripheral area and an inner area. The inner area is closer to the opening than the peripheral area, and the pressing part is formed on the inner area.

According to another embodiment of the present disclosure, a cassette type electrodialysis membrane set is provided. The cassette type electrodialysis module includes a plurality of cassette type electrodialysis units and a positioning assembly. Each cassette type electrodialysis unit includes a housing box, a filter membrane group and a cover. The accommodating box body includes a diaphragm bearing seat, a diaphragm limiting wall and an accommodating opening. The diaphragm limiting wall is arranged around the diaphragm bearing seat. The accommodating opening is formed between the diaphragm bearing seat and the diaphragm limiting wall. The filter membrane group is arranged on the membrane supporting seat and abuts against the inner side of the membrane limiting wall. The filter membrane set includes a plurality of first ion exchange membranes and a plurality of second ion exchange membranes alternately arranged; and a plurality of flow channel partitions. The flow channel separator is arranged between the first ion exchange membrane and the second ion exchange membrane. The cover member is disposed on the accommodating box body, and the cover member includes at least one opening, a body portion, and a pressing portion. At least one of the openings passes through the body portion, and the body portion is adjacent to a One side has a peripheral area and an inner area. The inner area is closer to the opening than the peripheral area, and the pressing part is formed on the inner area. The positioning component is arranged on the outer side of the diaphragm limiting wall, so that the cassette type electrodialysis units are aligned with each other.

According to another embodiment of the present disclosure, a cassette type electrodialysis membrane set is provided. The cassette type electrodialysis module includes a plurality of cassette type electrodialysis units and a positioning assembly. Each cassette type electrodialysis unit includes a housing box, a filter membrane group and a cover. The accommodating box body includes a diaphragm bearing seat, a diaphragm limiting wall and an accommodating opening. The diaphragm limiting wall is arranged around the diaphragm bearing seat. The accommodating opening is formed between the diaphragm bearing seat and the diaphragm limiting wall. The filter membrane group is arranged on the membrane supporting seat and abuts against the inner side of the membrane limiting wall. The filter membrane set includes a plurality of first ion exchange membranes and a plurality of second ion exchange membranes alternately arranged; and a plurality of flow channel partitions. The flow channel separator is arranged between the first ion exchange membrane and the second ion exchange membrane. The cover member is disposed on the accommodating box body, and the cover member includes at least one opening, a body portion, and a pressing portion. At least one of the openings passes through the body portion, and the body portion is adjacent to a One side has a peripheral area and an inner area. The inner area is closer to the opening than the peripheral area, and the pressing part is formed on the inner area. The positioning components are arranged on a first side and a second side of each cassette type electrodialysis unit, and the first side of each cassette type electrodialysis unit is opposite to the second side of each cassette type electrodialysis unit.

In order to have a better understanding of the above and other aspects of the present disclosure, the following examples are specially cited, and the accompanying drawings are described in detail as follows:

FIG. 1 is a three-dimensional schematic diagram of a cassette type electrodialysis unit 10 according to an embodiment of the present disclosure. FIG. 2 is an exploded schematic diagram of the cassette type electrodialysis unit 10 according to an embodiment of the present disclosure. FIG. 3 is a cross-sectional view of the cassette type electrodialysis unit 10 according to an embodiment of the present disclosure.

Please refer to FIGS. 1 and 2 at the same time, the cassette type electrodialysis unit 10 includes a housing box body 1, a filter membrane group 2 and a cover member 3. The filter membrane group 2 is arranged between the accommodating box body 1 and the cover member 3. As shown in Figure 1, the outer side of the accommodating box 1 has a thickness in the first direction D1, a length L1 in the second direction D2, and a width W1 in the third direction D3. The first direction D1, the second direction D2, and the third direction D3 are, for example, perpendicular to each other. The outer side of the cover member 3 has a length L2 in the second direction D2 and a width W2 in the third direction D3. The length L1 may be equal to the length L2, and the width W1 may be equal to the width W2, but is not limited thereto. Unless otherwise specified below, the thickness of each element refers to the thickness formed in the first direction, the length is the length formed in the second direction, and the width is the width formed in the third direction. In Figure 1, the cassette type electrodialysis unit 10 of the present case is arranged vertically, for example, the length direction of the housing box 1 (ie, the second direction D2) is perpendicular to the plane G where the cassette type electrodialysis unit 10 is placed. (For example, the plane formed by the first direction D1 and the third direction D3 in Figure 1). However, the present disclosure is not limited to this. The cassette type electrodialysis unit 10 may also be horizontally arranged, for example, the housing of the box 1 The length direction (ie, the second direction D2) is parallel to the placement plane G, as shown in Figures 4-6.

Please refer to FIG. 2, the accommodating box body 1 includes a diaphragm supporting seat 11, a diaphragm limiting wall 12 and an accommodating opening 13. The diaphragm limiting wall 12 is arranged around the diaphragm supporting base 11. The accommodating opening 13 is formed between the diaphragm supporting seat 11 and the diaphragm limiting wall 12. The accommodating box 1 is, for example, a rectangular box-shaped structure, but the present disclosure is not limited to this.

The filter membrane group 2 is disposed on the membrane supporting seat 11 and abuts against the inner side of the membrane limiting wall 12. That is, the filter membrane group 2 is disposed in the accommodating opening 13. The filter membrane set 2 includes a plurality of first ion exchange membranes 21 and a plurality of second ion exchange membranes 23 alternately arranged, and includes a plurality of flow channel partitions 22, which are arranged on the first ion exchange membrane 21 Between and the second ion exchange membrane 23. The first ion exchange membrane 21, the second ion exchange membrane 23 and the flow channel separator 22 can be regarded as a plurality of membranes in the filter membrane group 2. In one embodiment, the first ion exchange membrane 21 is an anion exchange membrane, and the second ion exchange membrane 23 is a cation exchange membrane. In another embodiment, the first ion exchange membrane 21 is a cation exchange membrane, and the second ion exchange membrane 23 is an anion exchange membrane. The dimensions (for example, length and width) of each first ion exchange membrane 21, each second ion exchange membrane 23, and each flow channel separator 22 in the filter membrane set 2 may be the same as each other, and may correspond to the receiving opening 13 (Or the size (for example, length and width) of the exposed area of the diaphragm carrier 11 defined by the diaphragm limiting wall 12, but not limited thereto. The user can select filter membrane sets 2 of different sizes or different numbers of membranes according to requirements (for example, membrane compression conditions and water purification standards in the filter membrane set 2). In some embodiments, the length L3 of the accommodating opening 13 can be between 40 cm and 160 cm, and the width W3 of the accommodating opening 13 can be between 20 cm and 80 cm, but the present disclosure is not limited thereto.

Since the size of the accommodating opening 13 enclosed by the diaphragm limiting wall 12 corresponds to the size of the first ion exchange membrane 21, the second ion exchange membrane 23 and the flow channel partition 22, the first ion exchange membrane 21, When the second ion exchange membrane 23 and the flow channel partition 22 are put into the accommodating opening 13 one by one, the inner side of the diaphragm limiting wall 12 can make the first ion exchange membrane 21, the second ion exchange membrane 23 and the flow channel partition 22 are aligned with each other and fixed on the diaphragm carrier 11, there is no need to use glue to fix the first ion exchange membrane 21, the second ion exchange membrane 23 and the flow channel partition 22, and no extra manpower is required to fix the first ion exchange membrane. The ion exchange membrane 21, the second ion exchange membrane 23, and the flow channel separator 22 are aligned with each other, and even a large-sized filter membrane group 2 can still be assembled easily. Compared with the comparative example of the electrodialysis unit without the diaphragm restricting wall, since this case has the diaphragm restricting wall 12, it can be more time-saving and labor-saving when assembling the cassette-type electrodialysis unit 10. Accurately align the first ion exchange membrane 21, the second ion exchange membrane 23, and the flow channel partition 22, which can effectively reduce the internal water leakage caused by the deviation of the diaphragm position, thereby eliminating the risk of mixing of purified water and sewage. In some embodiments, the thickness of the membrane limiting wall 12 in the first direction D1 may be equal to or greater than the thickness of the filter membrane group 2 in the first direction D1.

In addition, after the filter membrane group 2 is set on the membrane supporting seat 11, the cover member 3 can be set on the accommodating box body 1 and the filter membrane group 2. That is, the cover member 3 is detachably combined with the accommodating box body 1, and the filter membrane group 2 is disposed between the accommodating box body 1 and the cover member 3. The cover member 3 includes at least one opening 33, a body portion 32, and a pressing portion 31, wherein the opening 33 passes through the body portion 32, and the body portion 32 has a first side S1 adjacent to the filter membrane set 2 and away from A second side S2 of the filter membrane group 2, the first side S1 and the second side S2 are located on opposite sides of the main body 32. The first side S1 of the body portion 32 has a peripheral area 321 and an inner area 322. The inner area 322 is closer to the opening 33 than the peripheral area 321, and the pressing portion 31 is formed on the inner area 322, such as surrounding Opening 33. That is, the pressing portion 31 is a protruding portion on the first side S1 of the main body portion 32. In this embodiment, the central part of the cover 3 has an opening 33, but the disclosure is not limited to this. In other embodiments, the central part of the cover 3 may have multiple openings. The size (for example, length and width) of the pressing portion 31 may correspond to (for example, equal to, slightly larger than, or slightly smaller than) the size (for example, length and width) of the filter membrane group 2. After the cover member 3 is detachably combined with the accommodating box 1, the pressing portion 31 can provide a flat pressing stress to evenly squeeze the filter membrane group 2 so that the thickness of the filter membrane group 2 is reduced (such as As shown in Figure 3), compared with the comparative example of squeezing the filter membrane group by the point-like pressing stress, the pressing part 31 of this case solves the problem of uneven force of the filter membrane group 2. Provide a better leak-proof effect.

Please refer to FIG. 2, in some embodiments, the cassette type electrodialysis unit 10 further includes a first sealing member 41 and a second sealing member 42. The first sealing member 41 is disposed between the membrane supporting seat 11 and the filter membrane group 2. For example, the first sealing member 41 conforms to the contour of the inner surface of the diaphragm carrier 11 and is attached to the inner surface of the diaphragm carrier 11 and has a size corresponding to the receiving opening 13. The second sealing member 42 is disposed between the pressing portion 31 and the filter membrane group 2 and between the peripheral area 321 and the membrane limiting wall 12. Furthermore, the second sealing member 42 includes a first portion 42a and a second portion 42b. The cover member 3 has an inner surface 3S corresponding to the first side S1. The first portion 42a of the second seal 42 is disposed on the inner surface 3S corresponding to the pressing portion 31, conforms to the contour of the inner surface 3S corresponding to the pressing portion 31, and is attached to the inner surface 3S corresponding to the pressing portion 31 superior. The second portion 42b of the second sealing member 42 is disposed on the inner surface 3S corresponding to the peripheral area 321, conforms to the contour of the inner surface 3S corresponding to the peripheral area 321, and is attached to the inner surface corresponding to the peripheral area 321 On 3S. The peripheral area 321 of the cover member 3 and the second portion 42 a of the second sealing member 42 disposed thereon are used to be detachably connected to the upper edge 121 of the diaphragm limiting wall 12. The pressing portion 31 of the cover member 3 and the first portion 42a of the second sealing member 42 disposed thereon are used to be detachably connected to the filter membrane group 2 (as shown in FIG. 3). The pressing portion 31 of the cover member 3 can be used to compress the filter membrane group 2 (as shown in Fig. 3). In some embodiments, the first sealing member 41 and the second sealing member 42 may be any soft cushion material, and the material of the soft cushion material is, for example, silicone, rubber, polyethylene (PE) or other suitable materials. The first sealing member 41 can provide the water tightness between the first ion exchange membrane (for example, the first ion exchange membrane 21 or the second ion exchange membrane 23) closest to the membrane support 11 and the membrane support 11 . The second sealing member 42 may provide the first ion exchange membrane closest to the cover member 3 (in this embodiment, it is the first ion exchange membrane 21, but in other embodiments it may be the second ion exchange membrane 23) The water tightness with the cover 3.

Please refer to Figures 1 and 2, the cover member 3 also has a plurality of holes 301 extending along a first direction D1 and a plurality of extending holes 302 extending along a second direction D2, the first direction D1 is parallel In the normal direction of the inner surface 3S, the second direction D2 is perpendicular to the normal direction of the inner surface 3S. The hole 301 of the cover member 3 passes through the pressing portion 31 and the body portion 32, and the extending hole 302 connects the corresponding hole 301 to the opening 33. Wherein, the hole 301 of the cover member 3 includes a first group of holes 3011 and a second group of holes 3012. The first group of holes 3011 and the second group of holes 3012 are formed on two opposite sides of the opening 33 (for example, the upper side and the lower side). ), the holes 301 in the first group of holes 3011 are separated from each other along a third direction D3, and the holes 301 in the second group of holes 3012 are separated from each other along the third direction D3. In the second direction D2, the extension holes 302 connected to the holes 301 in the first group of holes 3011 are separated from the extension holes 302 connected to the holes 301 in the second group of holes 3012. In other words, the extending hole 302 on the upper side and the extending hole 302 on the lower side are respectively connected to the first group of holes 3011 and the second group of holes 3012 that do not overlap each other in the second direction D2.

In addition, each of the first ion exchange membranes 21 includes a first group of holes 2101 and a second group of holes 2102 arranged on opposite sides (for example, the upper side and the lower side), and each of the second ion exchange membranes 23 includes A first group of holes 2301 and a second group of holes 2302 on the side (for example, the upper side and the lower side), and each runner partition 22 includes a first group of holes arranged on two opposite sides (for example, the upper side and the lower side) Holes 2201 and a second group of holes 2202. The diaphragm carrier 11 includes a plurality of large holes 1100 and a plurality of small holes 1102, wherein the small holes 1102 are arranged on two opposite sides of the large hole 1100 (for example, the upper side and the lower side), and the small holes 1102 include the large holes 1100. A first group of holes (not shown) on the upper side and a second group of holes 1102 disposed on the lower side of the large hole 1100.

With the assistance of the diaphragm limiting wall 12, the first group of holes (not shown) of the diaphragm carrier 11, the first group of holes 3011 of the cover member 3, the first group of holes of each first ion exchange membrane 21 2101. The first group of holes 2301 of each second ion exchange membrane 23 and the first group of holes 2201 of each flow channel separator 22 can correspond to each other; The two groups of holes 3012, the second group of holes 2102 of each first ion exchange membrane 21, the second group of holes 2302 of each second ion exchange membrane 23, and the second group of holes 2202 of each flow channel separator 22 may correspond to each other.

Please refer to FIG. 3, the cover member 3 has an inner surface 3S corresponding to the first side S1. In the normal direction F3 of the inner surface 3S, the pressing portion 31 and the body portion 32 located in the inner area 322 are formed together The thickness T1 is greater than the thickness T2 formed by the body portion 32 in the peripheral area 321. Before the filter membrane group 2 is compressed by the pressing portion 31, the filter membrane group 2 has a first thickness T3. In this embodiment, before the filter membrane set 2 is compressed by the pressing portion 31, the upper surface 21a of the first ion exchange membrane 21 in the filter membrane set 2 farthest from the membrane carrier 11 can be coplanar with the membrane. The upper edge 121 of the limiting wall 12, however, the present disclosure is not limited to this. After the filter membrane group 2 is compressed by the pressing portion 31, the filter membrane group 2 has a second thickness T4, wherein the second thickness T4 is smaller than the first thickness T3. The second thickness T4 has a compression percentage R for the first thickness T3, the compression percentage R=the second thickness T4/the first thickness T3, and the compression percentage R can range from 3% to 15%, for example, 7% to 10% . It can be seen that as long as the thickness formed by the pressing portion 31 and the body portion 32 located in the inner area 322, the thickness of the diaphragm limiting wall 12, and the thickness of the filter diaphragm group 2 are designed, the cover member 3 can be completely After the accommodating box body 1 is covered, the required compression percentage R of the filter membrane group 2 can be obtained, which meets the degree of tightness required by the filter membrane group 2.

In some embodiments, the number of pairs of membranes formed by the first ion exchange membrane 21 and the second ion exchange membrane 23 in the filter membrane group 2 can range from 20 to 50 pairs, and the compression percentage of the filter membrane group 2 is R The range can be 3%~15%, the product water flow rate of a single cassette type electrodialysis unit 10 can be 10~100 LPM, and the desalination efficiency range can be 10~40%, but this disclosure is not based on this. Is limited. It can be seen that the use of the cassette type electrodialysis unit 10 according to an embodiment of the present disclosure for electrodialysis not only has the advantages of convenient assembly, accurate positioning, and good water tightness, but also maintains a good water flow rate and desalination performance. .

FIGS. 4-6 are schematic diagrams illustrating the assembly process of the cassette type electrodialysis unit 10 according to an embodiment of the present disclosure.

Referring to Figure 4, a housing box 1 is provided first, and then the second ion exchange membrane 23, the flow channel partition 22, the first ion exchange membrane 21 and the flow channel partition 22 in the filter membrane set 2 are The sequence is placed in the accommodating opening 13. In this embodiment, the uppermost membrane in the filter membrane group 2 (that is, the membrane furthest away from the membrane support 11) is the first ion exchange membrane 21, and the lowermost membrane is the second ion exchange membrane. 23. However, this disclosure is not limited to this.

Please refer to Fig. 5, when any one of the first ion exchange membrane 21, the flow channel partition 22, or the second ion exchange membrane 23 is inserted into the accommodating opening 13, the membrane carrier 11 and the filter membrane assembly 2 is of the same size. When the diaphragm is slid into the accommodating box 1, the diaphragm limit wall 12 can be used to automatically modify and arrange the diaphragm to fall to the angular position of the diaphragm carrier 11, so that the filter diaphragm group 2 It is neatly placed on the diaphragm carrier 11, and there is no need to waste manpower to adjust the position of each diaphragm to align it. The assembly efficiency is greatly improved, and the positional relationship of each diaphragm can be ensured. Therefore, the internal water leakage caused by the deviation of the diaphragm position can be effectively reduced, and the risk of mixing of purified water and sewage can be eliminated.

Please refer to Figure 6, after the filter membrane assembly 2 is placed in the accommodating opening 13, the pressing portion 31 of the cover member 3 faces the filter membrane assembly 2, and the cover member 3 is detachably combined with the filter The diaphragm set 2 and the accommodating box body 1, the upper edge 121 of the accommodating box body 1 and the peripheral area 321 of the body portion 321 of the cover member 3 and the first part 42a of the second sealing member 42 (not shown) ) Are closely attached to each other, so that the filter membrane group 2 is compressed by the pressing part 31, as shown in FIG. 3.

FIG. 7 is an exploded schematic diagram of the cassette type electrodialysis module 10M according to an embodiment of the present disclosure. FIG. 8 is a three-dimensional schematic diagram of a cassette type electrodialysis module 10M according to an embodiment of the present disclosure.

Please refer to FIGS. 7 and 8 at the same time, the cassette type electrodialysis module 10M includes a first electrode cassette 51b, a second electrode cassette 52b, a plurality of cassette type electrodialysis units 10A and 10B, and a third sealing member 43 , 2 fourth seals 44a and 44b, a clamping assembly 5b and a positioning assembly 7b. The cassette type electrodialysis units 10A and 10B are arranged between the first electrode cassette 51b and the second electrode cassette 52b. The first electrode cassette 51b and the second electrode cassette 52b can be used to operate an electric field, and can be used as a positive electrode or a negative electrode, respectively.

Each cassette type electrodialysis unit 10A and 10B in Figures 7 and 8 is the same as the cassette type electrodialysis unit 10 shown in Figures 1 and 2, and the similarities will not be described again. In this embodiment, only two cassette-type electrodialysis units 10A and 10B are exemplarily shown, but the present disclosure is not limited thereto. The cassette-type electrodialysis module 10M of the present disclosure may include any number of cassettes The type of electrodialysis unit depends on the number of pairs of anion exchange membrane and cation exchange membrane required. Generally speaking, in the comparative example where only the screw is used to fix all the anion and cation exchange membranes and the electrode plate or the comparative example where only the screw is used to penetrate the pressing plate to tighten the anion and cation exchange membrane and the electrode plate, the anion exchange membrane and the cation The number of membrane pairs of the exchange membrane can only be up to 400 pairs, otherwise the compression stress at the center of the anion and cation membrane stack will be too small, causing the membrane layer in the middle to slip off. In contrast, the cassette type electrodialysis module 10M of the present disclosure may include any number of cassette type electrodialysis units 10A, 10B..., and each of the clip-on type electrodialysis units 10A, 10B... has an anion exchange membrane and a cation exchange membrane. Both can be subjected to sufficient compression stress to allow the anion and cation membrane stacks to achieve the desired compression ratio, so the cassette type electrodialysis module 10M can have any number of anion exchange membranes and cation exchange membrane pairs (that is, Can be greater than 400 pairs). Furthermore, during the electrodialysis process, if an abnormality is found in the cassette-type electrodialysis unit 10A, 10B..., as long as the cassette-type electrodialysis unit in question is dealt with (for example, it can be easily removed or replaced. A cassette type electrodialysis unit) does not need to interrupt the electrodialysis process for too long. Compared with the traditional electrodialysis membrane set, the cassette type electrodialysis module 10M is more time-saving and labor-saving in maintenance.

In addition, a third sealing member 43 may be provided between adjacent cassette type electrodialysis units 10A and 10B to increase water tightness. In this embodiment, the third sealing member 43 is conformal to the surface of the first side (that is, the side away from the filter membrane group 2) of the membrane carrier 11 of the cassette type electrodialysis unit 10B It has a contour and is attached to the first side of the membrane carrier 11 of the cassette type electrodialysis unit 10B (that is, the side away from the filter membrane set 2), but the present disclosure is not limited to this. In other embodiments, the third sealing member 43 may conform to the contour of the surface of the second side (that is, the side away from the filter membrane group 2) of the cover member 3 of the cassette type electrodialysis unit 10A, It is attached to the second side (the side away from the filter membrane group 2) of the cover member 3 of the cassette type electrodialysis unit 10A. In addition, the number of the third sealing element 43 can be determined according to the number of the cassette type electrodialysis unit. When the number of the cassette type electrodialysis unit is N, the number of the third sealing element 43 can be N-1, as long as each A third sealing member 43 may be provided between two adjacent cassette-type electrodialysis units.

In some embodiments, the two fourth seals 44 include fourth seals 44a and 44b, and the fourth seals 44a and 44b are respectively disposed in the first electrode cartridge 51b and the cassette type electrodialysis unit 10A and 10B. Between the clip-on electrodialysis units 10A adjacent to the first electrode cartridge 51b and the clip-on electrodialysis unit closest to the second electrode cartridge 52b among the second electrode cartridge 52b and the cartridge-type electrodialysis units 10A and 10B Between 10B. In this embodiment, the fourth sealing member 44a is conformal to the surface of the first side (that is, the side away from the filter membrane group 2) of the membrane carrier 11 of the cassette type electrodialysis unit 10A It has a contour and is attached to the first side (that is, the side away from the filter membrane group 2) of the membrane carrier 11 of the cassette type electrodialysis unit 10A; the fourth sealing member 44b is conformal to the second The contour of the surface of the first side of the electrode cassette 52b (that is, the side adjacent to the cassette type electrodialysis unit 10B), and is attached to the first side of the second electrode cassette 52b (that is, the side adjacent to the cassette Type electrodialysis unit 10B), however, the present disclosure is not limited to this. In other embodiments, the fourth sealing member 44a is conformal to the second side of the first electrode cartridge 51b (that is, adjacent to The contour of the surface of one side of the cassette type electrodialysis unit 10A, and is attached to the second side of the first electrode cassette 51b; the fourth sealing member 44b is conformal to the cover member of the cassette type electrodialysis unit 10B The contour of the surface of the second side S2 of 3 (that is, the side away from the filter membrane set 2), and is attached to the second side S2 of the cover 3 of the cassette type electrodialysis unit 10B (that is, It is the side away from the filter membrane group 2). In this embodiment, the appearance of the two fourth sealing members 44a and 44b can be different from each other. In other embodiments, the appearance of the two fourth sealing members 44a and 44b may be the same as each other.

In some embodiments, the positioning component 7b is disposed on the outer side of the diaphragm limiting wall 12 of the cassette type electrodialysis unit 10A and 10B, and the outer side of the first electrode cassette 51b and the second electrode cassette 52b, so that the cassette type electrodialysis unit The units 10A and 10B, the first electrode cassette 51b and the second electrode cassette 52b are aligned with each other. For example, the positioning assembly 7b includes a plurality of limit sliding rails 71b, a plurality of first positioning portions 72b, and a plurality of second positioning portions 73b. The limit sliding rail 71b is arranged on the same side of the cassette type electrodialysis unit 10A and 10B. The first positioning portion 72b is formed on the outer side of the diaphragm limiting wall 12 and is correspondingly combined with the limiting sliding rail 71b. The second positioning portion 73b is formed on the outer side of the first electrode cassette 51b and the second electrode cassette 52b and is correspondingly combined with the limiting slide rail 71b. The first positioning portion 72b and the second positioning portion 73b are, for example, grooves. By combining the position-limiting slide rail 71b with the first positioning portion 72b and the second positioning portion 73b corresponding to each other, the cassette type electrodialysis units 10A and 10B, the first electrode cassette 51b and the second electrode cassette 52b can be easily aligned with each other . In other embodiments, the positioning component 7b may not be arranged on the outer side of the diaphragm limiting wall 12 of the cassette type electrodialysis unit 10A and 10B (details will be described later).

In some embodiments, the clamping assembly 5b includes a plurality of first coupling portions 511b, a plurality of second coupling portions 521b, and a plurality of screw members 54b. The first coupling portion 511b is formed on the outside of the first electrode cassette 51b. The second coupling portion 521b is formed on the outside of the second electrode cassette 52b. The screw member 54b connects the first coupling portion 511b and the second coupling portion 521b respectively, so that the first electrode cassette 51b, the cassette type electrodialysis units 10A and 10B, and the second electrode cassette 52b are fixed to each other. Since the filter membrane set 2 in each cassette type electrodialysis unit 10A and 10B in this case has reached the desired compression ratio, the clamping assembly 5b only needs to apply a relatively low force to tighten the first electrode cassette 51b and the cassette The modular electrodialysis units 10A and 10B and the second electrode cartridge 52b can meet the water tightness requirements of the cassette electrodialysis module 10M.

In some embodiments, the clamping assembly 5b may not include the first coupling portion 511b, the second coupling portion 521b, and the screw member 54b. On the contrary, the clamping assembly 5b may include the second electrode and the outer side of the first electrode cartridge 51b. The outer side of the cassette 52b and the fixing members (not shown) on the outer side of the cassette-type electrodialysis units 10A and 10B are provided by any two adjacent first electrode cassettes 51b, the cassette-type electrodialysis units 10A and 10B, and the second The fixing parts on the electrode cassette 52b are correspondingly combined with each other to achieve the tightness and fixation between the first electrode cassette 51b, the second electrode cassette 52b, and the cassette type electrodialysis units 10A and 10B, which satisfies the cassette type electrodialysis module The water tightness requirement of 10M. The fixing element is, for example, a buckle, a pin or other suitable fixing element (not shown).

In some implementations, the first electrode cassette 51b, the second electrode cassette 52b, and the cassette type electrodialysis units 10A and 10B may be respectively provided with rollers (not shown), so that the first electrode can be moved in a more convenient manner. The cassette 51b, the second electrode cassette 52b, and the cassette type electrodialysis units 10A and 10B.

Fig. 9 is a side view of a cassette type electrodialysis module 10N according to another embodiment of the present disclosure. The difference between the cassette type electrodialysis module 10N and the cassette type electrodialysis module 10M lies in the number of cassette type electrodialysis units and the number of electrode cassettes, and other similarities or similarities will not be described again.

Please refer to Figure 9, the cassette type electrodialysis module 10N includes a first electrode cassette 51b, a second electrode cassette 52b, a third electrode cassette 53b, a plurality of cassette type electrodialysis units 10A, 10B, 10C, 10D..., a plurality of third sealing elements 43, four fourth sealing elements, a clamping assembly 5b (shown in Figure 8) and a positioning assembly 7b (shown in Figure 8). However, the present disclosure is not limited to this. In other embodiments, the cassette type electrodialysis module 10N may not include the clamping assembly 5b. The structure of each cassette type electrodialysis unit 10A, 10B, 10C, 10D... is the same as that of the cassette type electrodialysis unit 10. The third electrode cassette 53b is arranged between the first electrode cassette 51b and the second electrode cassette 52b, and is inserted into the cassette type electrodialysis units 10A, 10B, 10C, 10D... For example, the third electrode cassette 53b is disposed between the cassette type electrodialysis units 10C and 10D. The first electrode cassette 51b, the second electrode cassette 52b, and the third electrode cassette 53b can be used to operate an electric field. When the number of cassette-type electrodialysis units 10A, 10B, 10C, 10D... increases, the distance between the first electrode cassette 51b and the second electrode cassette 52b also increases. If the distance between the first electrode cartridge 51b and the second electrode cartridge 52b is too far, the current efficiency (equivalent to the desalination efficiency) during the desalination reaction may decrease. Therefore, when the amount of water that needs to be treated increases, so that the required number of cassette-type electrodialysis units 10A, 10B, 10C, 10D... increases, the third electrode cartridge 53b can be inserted into the cassette-type electrodialysis units 10A, 10B, In 10C, 10D..., the distance between the two electrodes is maintained at the best state, so good current efficiency and desalination efficiency can be maintained.

The third sealing member 43 is arranged between each of two adjacent cassette type electrodialysis units 10A, 10B, 10C, 10D... The four fourth seals include fourth seals 44a, 44b, 44c, and 44d. The fourth sealing members 44a, 44b, 44c, and 44d are respectively disposed between the first electrode cassette 51b and the cassette type electrodialysis unit 10A, between the second electrode cassette 52b and the cassette type electrodialysis unit 10B, and the third electrode cassette 53b and the cassette type electrodialysis unit 10C and between the third electrode cassette 53b and the cassette type electrodialysis unit 10D.

FIG. 10A is a perspective schematic view of the second side of the cassette type electrodialysis unit 20 according to another embodiment of the present disclosure. 10B illustrates a perspective schematic view of the first side of the cassette type electrodialysis unit 20 according to another embodiment of the present disclosure.

The structure of the cassette-type electrodialysis unit 20 is similar to the cassette-type electrodialysis unit 10A, and the cassette-type electrodialysis unit 20 is additionally provided with a first positioning portion 17c, and the same and/or similar components are used for the same and/or Similar component symbols, repetitive parts will not be described in detail.

Please refer to FIGS. 10A and 10B, the cassette type electrodialysis unit 20 includes a housing box 1A, a filter membrane group 2 and a cover 3A. The first positioning portion 17c is provided on the first side (corresponding to the first side S1) and the second side (corresponding to the second side S2) of the cassette type electrodialysis unit 20. In this embodiment, the first positioning portion 17c includes a recessed portion 71c provided on the second side and a protruding portion 72c provided on the first side. For example, the recess 71c is provided on the second side of the cover member 3A, and the second side of the cover member 3A passes through part of the cover member 3A in the direction of the diaphragm carrier 11, and surrounds the opening 33 and the first group. Holes 3011 and a second group of holes 3012; the protruding portion 72c is arranged on the first side of the housing box 1A (that is, the first side of the diaphragm carrier 11), and is formed by the first side of the diaphragm carrier 11 The lateral direction protrudes away from the cover member 3A, and surrounds the large hole 1100 and the small hole 1102 (viewed from the first side). The recessed portion 71c and the protruding portion 72c are, for example, closed rectangles, respectively, but the disclosure is not limited thereto. The recessed portion 71c and the protruding portion 72c provided on two adjacent cassette-type electrodialysis units 20 can be correspondingly engaged with each other (shown in Figure 12), so a plurality of cassette-type electrodialysis units 20 can correspond to each other through The first positioning portion 17c (that is, the recessed portion 71c and the protruding portion 72c) are positioned to each other.

FIG. 11A is a perspective schematic view of the second side of the cassette type electrodialysis unit 30 according to another embodiment of the present disclosure. 11B illustrates a perspective schematic view of the first side of the cassette type electrodialysis unit 30 according to another embodiment of the present disclosure.

The structure of the cassette type electrodialysis unit 30 is similar to the cassette type electrodialysis unit 10A, and the cassette type electrodialysis unit 30 is additionally provided with a first positioning portion 17d, and the same and/or similar elements are used the same and/ Or similar component symbols, the repetitive parts will not be described in detail.

Referring to FIGS. 11A and 11B, the cassette type electrodialysis unit 30 includes a housing box body 1B, a filter membrane group 2 and a cover member 3B. The first positioning portion 17d is provided on the first side (corresponding to the first side S1) and the second side (corresponding to the second side S2) of the cassette type electrodialysis unit 30. In this embodiment, the first positioning portion 17d includes a protruding portion 71d provided on the second side and a recessed portion 72d provided on the first side. For example, the protrusion 71d is provided on the second side of the cover member 3B, and protrudes from the second side of the cover member 3B in a direction away from the diaphragm carrier 11, and surrounds the opening 33 and the first group of holes 3011 And a second group of holes 3012 (viewed from the second side); the recess 72d is provided on the first side of the housing box 1B (that is, the first side of the diaphragm carrier 11), and is carried by the diaphragm The first side of the seat 11 passes through a part of the diaphragm supporting seat 11 in the direction of the cover member 3B, and surrounds the large hole 1100 and the small hole 1102. The recessed portion 71d and the protruding portion 72d are, for example, closed rectangles, respectively, but the present disclosure is not limited thereto. The recessed portion 71d and the protruding portion 72d provided on two adjacent cassette-type electrodialysis units 30 can be correspondingly engaged with each other (shown in Figure 13), so a plurality of cassette-type electrodialysis units 30 can correspond to each other through The first positioning portion 17d (that is, the protruding portion 71d and the recessed portion 72d) are positioned to each other.

FIG. 12 is a perspective schematic diagram of a cassette type electrodialysis module 20M according to another embodiment of the present disclosure. In this embodiment, the cassette-type electrodialysis module 20M is different from the cassette-type electrodialysis module 10M in that the cassette-type electrodialysis module 20M may not have a clamping component, but the position of the positioning component is There are differences, and other identical elements will not be described repeatedly. In other embodiments, the cassette type electrodialysis module 20M may have a clamping component.

Please refer to FIG. 12, the cassette type electrodialysis module 20M includes a first electrode cassette 51b', a second electrode cassette 52b', a plurality of cassette type electrodialysis units 20A and 20B, and a positioning assembly 7c. The cassette type electrodialysis units 20A and 20B are arranged between the first electrode cassette 51b' and the second electrode cassette 52b'. The cassette type electrodialysis units 20A and 20B are the same as the cassette type electrodialysis unit 20 shown in FIGS. 10A and 10B, respectively. The cassette type electrodialysis module 20M may include any number of cassette type electrodialysis units.

The positioning assembly 7c is disposed on a first side (corresponding to the first side of the first electrode cartridge 51b') and a second side (corresponding to the second electrode of the second electrode cartridge 52b') of each cassette type electrodialysis unit 20A and 20B. On the two sides), the first side of each cassette-type electrodialysis unit 20A and 20B is opposite to the second side of each cassette-type electrodialysis unit 20A and 20B, and is on two cassette-type electrodialysis units adjacent to each other Among 20A and 20B, the second side of the cassette type electrodialysis unit 20A may be adjacent to the first side of the cassette type electrodialysis unit 20B. Furthermore, the positioning assembly 7c includes a plurality of first positioning portions 17c provided on the cassette type electrodialysis units 20A and 20B, and a plurality of second positioning portions 17c provided on the first electrode cassette 51b' and the second electrode cassette 52b'. The positioning portion 27c makes the cassette type electrodialysis units 20A and 20B, the first electrode cassette 51b' and the second electrode cassette 52b' align with each other.

For example, the first positioning portion 17c includes a protruding portion 72c provided on the first side of each cassette type electrodialysis unit 20A and 20B and a protrusion 72c provided on the second side of each cassette type electrodialysis unit 20A and 20B. A recessed portion 71c, and the protruding portions 72c of the adjacent cassette type electrodialysis units 20A and 20B are correspondingly combined with the recessed portion 71c. The second positioning portion 27c is disposed on one side of the first electrode cassette 51b' adjacent to the cassette type electrodialysis units 20A and 20B, and the second electrode cassette 52b' is adjacent to the cassette type electrodialysis units 20A and 20B On one side of, the second positioning portion 27c and the corresponding first positioning portion 17c are correspondingly combined with each other. The second positioning portion 27c includes a concave portion 73c provided on the first electrode cassette 51b' and a protruding portion 74c provided on the second electrode cassette 52b'.

In this embodiment, the concave portion 73c of the first electrode cartridge 51b' is engaged with the convex portion 72c of the cassette type electrodialysis unit 20A; the concave portion 71c of the cassette type electrodialysis unit 20A is engaged with the cassette type electrodialysis unit 20A. The protruding portions 72c of the electrodialysis unit 20B correspondingly engage with each other; the recess 71c of the cassette electrodialysis unit 20B is engaged with the protruding portion 72c of the second electrode cartridge 52b' corresponding to each other.

FIG. 13 is a perspective schematic diagram of a cassette type electrodialysis module 30M according to another embodiment of the present disclosure. In this embodiment, the cassette-type electrodialysis module 30M is different from the cassette-type electrodialysis module 10M in that the cassette-type electrodialysis module 30M may not have a clamping component, and the configuration of the positioning component is There are differences, and other identical elements will not be described repeatedly. In other embodiments, the cassette type electrodialysis module 30M may have a clamping component.

Please refer to FIG. 13, the cassette type electrodialysis module 30M includes a first electrode cassette 51b", a second electrode cassette 52b", a plurality of cassette type electrodialysis units 30A and 30B, and a positioning assembly 7d. The cassette type electrodialysis units 30A and 30B are arranged between the first electrode cassette 51b" and the second electrode cassette 52b". The cassette type electrodialysis units 30A and 30B are the same as the cassette type electrodialysis unit 30 shown in FIGS. 11A and 11B, respectively. The cassette type electrodialysis module 30M may include any number of cassette type electrodialysis units.

The positioning assembly 7d is provided on a first side (corresponding to the first side of the first electrode cassette 51b") and a second side (corresponding to the first side of the second electrode cassette 52b" of each cassette type electrodialysis unit 30A and 30B On the two sides), the first side of each cassette-type electrodialysis unit 30A and 30B is opposite to the second side of each cassette-type electrodialysis unit 30A and 30B, and is on two cassette-type electrodialysis units adjacent to each other Among 30A and 30B, the second side of the cassette type electrodialysis unit 30A may be adjacent to the first side of the cassette type electrodialysis unit 30B. Furthermore, the positioning assembly 7d includes a plurality of first positioning portions 17d provided on the cassette type electrodialysis unit 30A and 30B, and a plurality of second positioning portions provided on the first electrode cassette 51b" and the second electrode cassette 52b". The positioning portion 27d makes the cassette type electrodialysis units 30A and 30B, the first electrode cassette 51b" and the second electrode cassette 52b" align with each other.

For example, the first positioning portion 17d includes a recess 72d provided on the first side of each cassette type electrodialysis unit 30A and 30B, and a recess portion 72d provided on the second side of each cassette type electrodialysis unit 30A and 30B. The protruding portion 71d, the protruding portion 72d and the recessed portion 71d of the adjacent cassette type electrodialysis units 30A and 30B are correspondingly combined. The second positioning portion 27d is provided on one side of the first electrode cassette 51b" adjacent to the cassette type electrodialysis units 30A and 30B, and the second electrode cassette 52b" is adjacent to the cassette type electrodialysis units 30A and 30B On one side, the second positioning portion 27d and the corresponding first positioning portion 17d are correspondingly combined with each other. The second positioning portion 27c includes a protruding portion 73d provided on the first electrode cassette 51b" and a recessed portion 74d provided on the second electrode cassette 52b".

In this embodiment, the protruding portion 73d of the first electrode cartridge 51b" is engaged with the recess 72d of the cassette type electrodialysis unit 30A; the protruding portion 71d of the cassette type electrodialysis unit 20A is engaged with the card The recessed portions 72d of the cassette type electrodialysis unit 20B are correspondingly engaged with each other; the protruding portion 71d of the cassette type electrodialysis unit 30B is engaged with the recessed portion 74d of the second electrode cassette 52b″ corresponding to each other.

In some embodiments, the cassette type electrodialysis modules 20M and 30M may each include a third electrode cassette.

It should be understood that the different features of the above-mentioned embodiments of this case can be combined with each other.

The present disclosure provides a cassette type electrodialysis unit and a cassette type electrodialysis membrane group. The cassette type electrodialysis unit includes an accommodating box body, a filter membrane group and a cover member. The accommodating box body includes a diaphragm bearing seat, a diaphragm limiting wall and an accommodating opening. The diaphragm limiting wall is arranged around the diaphragm bearing seat. The accommodating opening is formed between the diaphragm bearing seat and the diaphragm limiting wall. The filter membrane group is arranged on the membrane supporting seat and abuts against the inner side of the membrane limiting wall. The filter membrane set includes a plurality of first ion exchange membranes and a plurality of second ion exchange membranes alternately arranged; and a plurality of flow channel partitions. The flow channel separator is arranged between the first ion exchange membrane and the second ion exchange membrane. The cover member is disposed on the accommodating box body, and the cover member includes at least one opening, a body portion, and a pressing portion. At least one of the openings passes through the body portion, and the body portion is adjacent to a One side has a peripheral area and an inner area. The inner area is closer to the opening than the peripheral area, and the pressing part is formed on the inner area.

Compared with the comparative example of the dialysis unit without the diaphragm restricting wall, since the cassette type electrodialysis unit of this case has the diaphragm restricting wall, it can be easily used in the process of stacking the filter diaphragm set. The ion exchange membrane, the second ion exchange membrane and the flow channel partition are aligned with each other and are fixed on the membrane supporting seat, no extra manpower is required to align the first ion exchange membrane, the second ion exchange membrane and the flow channel partition with each other , Even a large-size filter membrane set can be assembled easily, so it is more time-saving and labor-saving to assemble the cassette type electrodialysis unit, and can more accurately align the first ion exchange membrane, the second ion exchange membrane and The flow channel baffle can effectively reduce the internal water leakage caused by the deviation of the diaphragm position, thereby eliminating the risk of mixing of purified water and sewage. In addition, compared with the comparative example without the pressing part, since the cassette type electrodialysis unit of this case has the pressing part provided on the cover member, the cover member can be evenly combined with the housing box. To give the filter membrane set a compression stress, in a simple way to make the filter membrane set achieve the required compression ratio of the membrane, in addition to improving the problem of uneven force when compressing the filter membrane set, it can be Provide a better leak-proof effect.

In summary, although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Those with ordinary knowledge in the technical field to which the present invention belongs can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to those defined by the attached patent application scope.

1, 1A, 1B: containing box 2: filter membrane group 3, 3A, 3B: cover parts 3S: inner surface 5b: Clamping components 7b, 7c, 7d: positioning components 10, 10A, 10B, 10C, 10D, 20, 30: cassette type electrodialysis unit 10M, 10N, 20M, 30M: cassette type electrodialysis module 11: Diaphragm carrier 12: Diaphragm limit wall 13: Containment mouth 17c, 27d, 72b: the first positioning part 17d, 27d, 73b: second positioning part 21: The first ion exchange membrane 21a: upper surface 22: Runner partition 23: The second ion exchange membrane 31: Urgent Department 32: body part 33: opening 41: The first seal 42: second seal 42a: Part One 42b: Part Two 43: third seal 44a, 44b, 44c, 44d: the fourth seal 51b,51b’,51b”: The first electrode cartridge 52b, 52b’, 52b”: second electrode cartridge 53b: Third electrode cartridge 54b: Screw parts 71b: limit slide 71c, 72d, 73c, 74d: recessed part 72c, 71d, 73d, 74c: protruding part 121: top edge 301: Hole 302: Extension hole 321: Peripheral Area 322: Internal area 511b: The first joint 521b: The second joint 1100: big hole 1102: small hole 2101, 2201,2301, 3011: the first group of holes 2102, 2202, 2302, 3012: the second group of holes A,A’: End of section line D1: First direction D2: second direction D3: Third party G: plane L1, L2, L3: length S1: First side S2: second side T1, T2: thickness T3: first thickness T4: second thickness W1, W2, W3: width

Figure 1 is a perspective view of a cassette type electrodialysis unit according to an embodiment of the present disclosure; Figure 2 shows an exploded schematic diagram of a cassette type electrodialysis unit according to an embodiment of the present disclosure; Figure 3 shows a cross-sectional view of a cassette type electrodialysis unit according to an embodiment of the present disclosure; 4 to 6 are schematic diagrams of the assembly process of the cassette type electrodialysis unit according to an embodiment of the present disclosure; Fig. 7 is an exploded schematic diagram of a cassette type electrodialysis module according to an embodiment of the present disclosure; Fig. 8 is a three-dimensional schematic diagram of a cassette type electrodialysis module according to an embodiment of the present disclosure; Figure 9 illustrates a side view of a cassette type electrodialysis module according to another embodiment of the present disclosure; FIG. 10A is a perspective schematic view of the second side of the cassette type electrodialysis unit according to another embodiment of the present disclosure; 10B illustrates a perspective schematic view of the first side of the cassette type electrodialysis unit according to another embodiment of the present disclosure; FIG. 11A is a perspective schematic view of the second side of the cassette type electrodialysis unit according to another embodiment of the present disclosure; 11B illustrates a perspective schematic view of the first side of the cassette type electrodialysis unit according to another embodiment of the present disclosure; Figure 12 is a three-dimensional schematic diagram of a cassette type electrodialysis module according to another embodiment of the present disclosure; and FIG. 13 is a perspective schematic diagram of a cassette type electrodialysis module according to another embodiment of the present disclosure.

1: accommodating box

2: filter membrane group

3: cover parts

3S: inner surface

10: Cassette type electrodialysis unit

11: Diaphragm carrier

12: Diaphragm limit wall

13: Containment mouth

21: The first ion exchange membrane

22: Runner partition

23: The second ion exchange membrane

31: Urgent Department

32: body part

33: opening

41: The first seal

42: second seal

42a: Part One

42b: Part Two

121: top edge

301: Hole

302: Extension hole

321: Peripheral Area

322: Internal area

1100: big hole

1102: small hole

2101, 2201,2301, 3011: the first group of holes

2102, 2202, 2302, 3012: the second group of holes

L3: length

S1: First side

S2: second side

W3: width

Claims (20)

A cassette type electrodialysis unit includes an accommodating box body, a filter membrane group and a cover member, The accommodating box body includes: A diaphragm bearing seat; A diaphragm limiting wall, the diaphragm limiting wall is arranged around the diaphragm supporting seat; and An accommodating opening formed between the diaphragm bearing seat and the diaphragm limiting wall; Wherein the filter membrane group is arranged on the membrane bearing seat and is against the inner side of the membrane limiting wall, and the filter membrane group includes: A plurality of first ion exchange membranes and a plurality of second ion exchange membranes arranged alternately; and A plurality of flow channel separators are arranged between the first ion exchange membranes and the second ion exchange membranes; and The cover member is disposed on the accommodating box, and the cover member includes at least one opening, a body portion, and a pressing portion, wherein the at least one opening passes through the body portion, and the body portion is adjacent to A first side of the filter membrane group has a peripheral area and an inner area, the inner area is closer to the opening than the peripheral area, and the pressing part is formed on the inner area. The cassette type electrodialysis unit as described in claim 1, further including: A first sealing element arranged between the membrane carrier and the filter membrane assembly; and A second sealing element is arranged between the pressing part and the filter membrane group and between the peripheral area and the membrane limiting wall. The cassette type electrodialysis unit according to claim 1, wherein the cover member has an inner surface corresponding to the first side, and in the normal direction of the inner surface, the pressing part is located in the inner area The thickness formed by the main body part is greater than the thickness formed by the main body part in the peripheral area. The cassette type electrodialysis unit according to claim 1, wherein the pressing part surrounds the opening. The cassette type electrodialysis unit according to claim 1, wherein: Before the filter membrane group is compressed by the pressing part, the filter membrane group has a first thickness; and After the filter membrane group is compressed by the pressing part, the filter membrane group has a second thickness, wherein the second thickness is smaller than the first thickness. The cassette type electrodialysis unit according to claim 5, wherein the second thickness has a compression percentage with respect to the first thickness, and the compression percentage ranges from 3% to 15%. The cassette type electrodialysis unit according to claim 1, wherein the cover member has an inner surface corresponding to the first side, a plurality of holes extending along a first direction, and a second The first direction is parallel to the normal direction of the inner surface, and the second direction is perpendicular to the normal direction of the inner surface. The holes of the cover member pass through the pressing portion and In the main body, the extending holes connect the corresponding holes to the opening. The cassette type electrodialysis unit according to claim 7, wherein the holes of the cover member include a first group of holes and a second group of holes, and the first group of holes and the second group of holes are formed in the On opposite sides of the opening, the holes in the first group of holes are separated from each other along a third direction, the holes in the second group of holes are separated from each other along the third direction, and the third direction is perpendicular to The first direction and the second direction, where In the second direction, the extension holes connected to the holes in the first group of holes are separated from the extension holes connected to the holes in the second group of holes. The cassette type electrodialysis unit according to claim 7, wherein the holes of the cover member include a first group of holes and a second group of holes, and the first group of holes and the second group of holes of the cover member Group of holes are formed on two opposite sides of the opening, Each of the first ion exchange membranes includes a first group of holes and a second group of holes, each of the second ion exchange membranes includes a first group of holes and a second group of holes, and each of the flow channel separators includes a The first group of holes and the second group of holes, and Wherein the first group of holes of the cover member, the first group of holes of each of the first ion exchange membranes, the first group of holes of each of the second ion exchange membranes, and the first group of holes of each of the flow channel separators The groups of holes correspond to each other; the second group of holes of the cover member, the second group of holes of each of the first ion exchange membranes, the second group of holes of each of the second ion exchange membranes, and each of the flow channel partitions The second group of holes of the board correspond to each other. A cassette type electrodialysis module includes: A plurality of cassette type electrodialysis units and a positioning assembly, Each of the cassette type electrodialysis units includes a housing box, a filter membrane group and a cover member, The accommodating box body includes: A diaphragm bearing seat; A diaphragm limiting wall, the diaphragm limiting wall is arranged around the diaphragm supporting seat; and An accommodating opening formed between the diaphragm bearing seat and the diaphragm limiting wall; Wherein the filter membrane group is arranged on the membrane bearing seat and is against the inner side of the membrane limiting wall, and the filter membrane group includes: A plurality of first ion exchange membranes and a plurality of second ion exchange membranes arranged alternately; and A plurality of flow channel partitions are arranged between the first ion exchange membranes and the second ion exchange membranes; and The cover member is disposed on the accommodating box, and the cover member includes at least one opening, a body portion, and a pressing portion, wherein the at least one opening passes through the body portion, and the body portion is adjacent to A first side of the filter membrane group has a peripheral area and an inner area, the inner area is closer to the opening than the peripheral area, and the pressing part is formed on the inner area; The positioning component is arranged on the outer side of the diaphragm limiting wall, so that the cassette type electrodialysis units are aligned with each other. According to the cassette type electrodialysis unit according to claim 10, each cassette type electrodialysis unit further includes: A first sealing element arranged between the membrane carrier and the filter membrane assembly; and A second sealing element is arranged between the pressing part and the filter membrane group and between the peripheral area and the membrane limiting wall. The cassette type electrodialysis module according to claim 11, further comprising a third sealing element, and the third sealing element is disposed between the cassette type electrodialysis units. The cassette type electrodialysis module according to claim 10, wherein the positioning component further includes: A plurality of limit slide rails are arranged on the same side of the cassette type electrodialysis units; and A plurality of first positioning parts are formed on the outer side of the diaphragm limiting wall and correspondingly combined with the limiting sliding rails. The cassette type electrodialysis module described in claim 12 further includes: A first electrode cassette and a second electrode cassette, wherein the cassette-type electrodialysis units are arranged between the first electrode cassette and the second electrode cassette; and Two fourth seals are respectively disposed between the first electrode cassette and the clip-on electrodialysis unit closest to the first electrode cassette among the cassette-type electrodialysis units, and the second electrode cassette Between the cassette type electrodialysis unit and the clip type electrodialysis unit which is closest to the second electrode cassette among the cassette type electrodialysis units. The cassette type electrodialysis module according to claim 14, further comprising a third electrode cassette, the third electrode cassette is disposed between the first electrode cassette and the second electrode cassette and inserted into the cards In a cassette electrodialysis unit. The cassette type electrodialysis module according to claim 14, wherein the positioning component further includes: A plurality of limit slide rails are arranged on the same side of the cassette type electrodialysis units; A plurality of first positioning parts are formed on the outer side of the diaphragm limiting wall and correspondingly combined with the limiting sliding rails; and A plurality of second positioning parts are formed on the outer side of the first electrode cassette and the second electrode cassette and are correspondingly combined with the limit sliding rails. The cassette type electrodialysis module according to claim 14, further comprising a clamping assembly, and the clamping assembly includes: A plurality of first coupling parts are formed on the outer side of the first electrode cartridge; A plurality of second coupling parts are formed on the outer side of the second electrode box; and A plurality of screw elements are respectively connected to the first coupling parts and the second coupling parts, so that the first electrode cassette, the cassette type electrodialysis units, and the second electrode cassette are fixed to each other. A cassette type electrodialysis module includes: A plurality of cassette type electrodialysis units and a positioning assembly, Each of the cassette type electrodialysis units includes a housing box, a filter membrane group and a cover member, The accommodating box body includes: A diaphragm bearing seat; A diaphragm limiting wall, the diaphragm limiting wall is arranged around the diaphragm supporting seat; and An accommodating opening formed between the diaphragm bearing seat and the diaphragm limiting wall; The filter membrane group is arranged on the membrane bearing seat and is against the inner side of the membrane limiting wall, and the filter membrane group includes: A plurality of first ion exchange membranes and a plurality of second ion exchange membranes arranged alternately; and A plurality of flow channel partitions are arranged between the first ion exchange membranes and the second ion exchange membranes; and The cover member is disposed on the accommodating box, and the cover member includes at least one opening, a body portion, and a pressing portion, wherein the at least one opening passes through the body portion, and the body portion is adjacent to A first side of the filter membrane group has a peripheral area and an inner area, the inner area is closer to the opening than the peripheral area, and the pressing part is formed on the inner area; The positioning assembly is arranged on a first side and a second side of each of the cassette-type electrodialysis units, and the first side of each of the cassette-type electrodialysis units is opposite to each of the cassette-type electrodialysis units Of that second side. The cassette type electrodialysis module according to claim 18, wherein the positioning assembly further includes a plurality of first positioning portions, and the first positioning portions include the first side disposed on each of the cassette type electrodialysis units A concave portion on the upper side and a convex portion arranged on the second side of each of the cassette type electrodialysis units, and the concave portion of the adjacent cassette type electrodialysis units is correspondingly combined with the convex portion . The cassette type electrodialysis module according to claim 19, further comprising a first electrode cassette and a second electrode cassette, wherein the cassette type electrodialysis units are disposed on the first electrode cassette and the second electrode Box The positioning assembly further includes a plurality of second positioning portions, and the second positioning portions are disposed on one side of the first electrode cassette adjacent to the cassette type electrodialysis units and the phase of the second electrode cassette. On one side adjacent to the cassette type electrodialysis units, the second positioning portions and the corresponding first positioning portions are correspondingly combined with each other.

Images