Cassette-type electrodialysis unit and module including the same

Abstract

The cassette-type electrodialysis unit includes a housing, a filter membrane group and a cover member. The housing includes a membrane support seat, a membrane limiting wall and a housing port. The membrane limiting wall is arranged around the membrane support seat to form a housing port. The filter membrane group is arranged on the membrane support seat and abuts against the inner side of the membrane limiting wall. The filter membrane group includes a first ion exchange membrane, a second ion exchange membrane and a flow channel partition arranged between the first ion exchange membrane and the second ion exchange membrane. The cover member is arranged on the housing, and includes an opening, a main body and a pressing part, the opening passes through the main body, the main body is adjacent to the first side of the filter membrane group and has an outer area and an inner area, the inner area is closer to the opening than the outer area, and the pressing part is formed on the inner area.

Description

Technical Field

[0001] The present disclosure relates to an electrodialysis unit and a module including the same, and in particular to a cassette-type electrodialysis unit and a module including the same. Background Art

[0002] Electrodialysis (ED) technology is a thin-film separation technology driven by electric fields. It is used 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 alternating anion and cation exchange membranes. Under the action of the DC electric field of the electrode plates, anions and cations are driven to move to selectively permeate the anion and cation exchange membranes, so that anions and cations can be removed or concentrated in another waterway, thereby achieving the purpose of water purification.

[0003] The common electrodialysis technology is to use 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. However, this pressing method will only produce point-like compression stress at the point where the screw penetrates, and each screw needs to be locked separately, which is prone to the problem of different locking tightness of each screw. Not only is it difficult to control and unify the locking strength of the screw, but also because of such stress difference, the number of anion and cation exchange membranes that can be stacked is limited, and it is more likely to cause insufficient water tightness between the anion and cation exchange membranes in the central part, resulting in the mixing of clean water and sewage, and the inability to exert the effect of electrodialysis.

[0004] Another common electrodialysis technology is to add a pressure plate on the outermost side and make the screw only pass through the pressure plate to solve the problem of uneven pressure stress. However, because the anion and cation exchange membranes are not fixed by screws, many problems arise from the stacking of the anion and cation exchange membranes. 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 stacking process, resulting in an increased risk of internal clean water and sewage mixing. Alternatively, when there are a large number of anion and cation exchange membranes, not only is the stacking action quite time-consuming, it even requires the use of a crane for lifting, 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 checked, and then the assembly action can be repeated.

[0005] Therefore, there is still an urgent need to study an improved electrodialysis device to solve the above technical problems. Summary of the invention

[0006] The technical problem to be solved by the present disclosure is to provide a cartridge-type electrodialysis unit and a module including the same, which can save time and effort in assembling the cartridge-type electrodialysis unit, and can more accurately align the first ion exchange membrane, the second ion exchange membrane and the flow channel partition, so as to effectively reduce the internal water leakage problem caused by the position deviation of the membrane, thereby eliminating the risk of the mixture of clean water and sewage. In addition to improving the problem of uneven force when compressing the filter membrane group, it can provide a better anti-leakage effect.

[0007] In order to achieve the above-mentioned purpose, the present disclosure provides a cartridge-type electrodialysis unit, including a housing box, a filter membrane group and a cover member, wherein the housing box includes: a membrane support seat; a membrane limiting wall, the membrane limiting wall is arranged around the membrane support seat; and a receiving port is formed between the membrane support seat and the membrane limiting wall; wherein the filter membrane group is arranged on the membrane support seat and abuts 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 alternately arranged first ion exchange membranes. a second ion exchange membrane; and a plurality of flow channel partitions, disposed between the plurality of first ion exchange membranes and the plurality of second ion exchange membranes; and wherein the cover member is disposed on the accommodating box body, and the cover member includes at least one opening, a main body portion and a pressing portion, wherein the at least one opening passes through the main body portion, and the main body portion has an outer region and an inner region adjacent to a first side of the filter membrane group, the inner region is closer to the at least one opening than the outer region, and the pressing portion is formed on the inner region.

[0008] A cartridge-type electrodialysis module, comprising: a plurality of cartridge-type electrodialysis units and a positioning assembly, each of the cartridge-type electrodialysis units comprising a housing, a filter membrane group and a cover member, wherein the housing comprises: a membrane bearing seat; a membrane limiting wall, the membrane limiting wall is arranged around the membrane bearing seat; and a housing port is formed between the membrane bearing seat and the membrane limiting wall; wherein the filter membrane group is arranged on the membrane bearing seat and abuts against the inner side of the membrane limiting wall, the filter membrane group comprises: 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 plurality of first ion exchange membranes and the plurality of second ion exchange membranes; wherein the cover member is arranged on the accommodating box body, and the cover member includes at least one opening, a main body and a pressing portion, wherein the at least one opening passes through the main body, and the main body is adjacent to a first side of the filter membrane group and has an outer area and an inner area, the inner area is closer to the at least one opening than the outer area, and the pressing portion is formed on the inner area; wherein the positioning component is arranged on the outer side of the membrane limiting wall, so that the plurality of cassette-type electrodialysis units are aligned with each other.

[0009] A cartridge-type electrodialysis module, comprising: a plurality of cartridge-type electrodialysis units and a positioning assembly, each of the cartridge-type electrodialysis units comprising a housing, a filter membrane group and a cover member, wherein the housing comprises: a membrane support seat; a membrane limiting wall, the membrane limiting wall is arranged around the membrane support seat; and a housing port is formed between the membrane support seat and the membrane limiting wall; wherein the filter membrane group is arranged on the membrane support seat and abuts against the inner side of the membrane limiting wall, the filter membrane group comprises: a plurality of first ion exchange membranes and a plurality of second ion exchange membranes arranged alternately; and a plurality of flow channel partitions, arranged between the plurality of first between the ion exchange membrane and the plurality of second ion exchange membranes; and wherein the cover member is disposed on the accommodating box body, and the cover member includes at least one opening, a main body and a pressing portion, wherein the at least one opening passes through the main body, and the main body has an outer region and an inner region adjacent to a first side of the filter membrane group, the inner region is closer to the at least one opening than the outer region, and the pressing portion is formed on the inner region; wherein the positioning assembly is disposed 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 relative to the second side of each of the cassette-type electrodialysis units.

[0010] The beneficial effect of the present disclosure lies in that, compared with the comparative example of the dialysis unit without the membrane limiting wall, since the cassette-type electrodialysis unit of the present disclosure has the membrane limiting wall, the first ion exchange membrane, the second ion exchange membrane and the flow channel partition can be easily aligned with each other and fixed on the membrane support seat during the process of stacking the filter membrane group, and no additional 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-sized filter membrane group can still be easily assembled, so it is more time-saving and labor-saving to assemble the cassette-type electrodialysis unit, and the first ion exchange membrane, the second ion exchange membrane and the flow channel partition can be aligned more accurately, which can effectively reduce the internal water leakage problem caused by the deviation of the membrane position, thereby eliminating the risk of mixing clean water and sewage. In addition, compared to the comparative example without the pressing part, since the cartridge-type electrodialysis unit disclosed in the present invention has the pressing part arranged on the cover body, a pressing stress can be uniformly applied to the filter membrane group when the cover body is combined with the accommodating box body, so that the filter membrane group can achieve the required membrane compression ratio in a simple manner. In addition to improving the problem of uneven force when compressing the filter membrane group, it can provide a better leak-proof effect.

[0011] The present disclosure is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a three-dimensional schematic diagram of a cassette-type electrodialysis unit according to an embodiment of the present disclosure;

[0013] Figure 2 is an exploded schematic diagram of a cassette-type electrodialysis unit according to an embodiment of the present disclosure;

[0014] Figure 3 is a cross-sectional view of a cassette-type electrodialysis unit according to an embodiment of the present disclosure;

[0015] Figures 4 to 6 is a schematic diagram of an assembly process of a cassette-type electrodialysis unit according to an embodiment of the present disclosure;

[0016] Figure 7 is an exploded schematic diagram of a cassette-type electrodialysis module according to an embodiment of the present disclosure;

[0017] Figure 8 is a three-dimensional schematic diagram of a cassette-type electrodialysis module according to an embodiment of the present disclosure;

[0018] Fig. 9 is a side view of a cassette-type electrodialysis module according to another embodiment of the present disclosure;

[0019] Fig. 10A is a perspective schematic diagram of a second side of a cassette-type electrodialysis unit according to another embodiment of the present disclosure;

[0020] Fig. 10B is a perspective schematic diagram of a first side of a cassette-type electrodialysis unit according to another embodiment of the present disclosure;

[0021] Fig.11A is a perspective schematic diagram of a second side of a cassette-type electrodialysis unit according to another embodiment of the present disclosure;

[0022] Fig. 11B is a perspective schematic diagram of a first side of a cassette-type electrodialysis unit according to another embodiment of the present disclosure;

[0023] Fig.12 is a three-dimensional schematic diagram of a cassette-type electrodialysis module according to another embodiment of the present disclosure; and

[0024] Fig.13 FIG. 4 is a three-dimensional schematic diagram of a cassette-type electrodialysis module according to another embodiment of the present disclosure.

[0025] Wherein, the reference numerals are:

[0026] 1,1A,1B: Container

[0027] 2: Filter membrane group

[0028] 3,3A,3B: Cover

[0029] 3S: Inner surface

[0030] 5b: Clamping assembly

[0031] 7b,7c,7d: Positioning components

[0032] 10,10A,10B,10C,10D,20,30: Cassette-type electrodialysis unit

[0033] 10M, 10N, 20M, 30M: Cassette-type electrodialysis module

[0034] 11: Diaphragm bearing seat

[0035] 12: Diaphragm limit wall

[0036] 13: Receiving port

[0037] 17c, 17d, 72b: first positioning part

[0038] 27c, 27d, 73b: Second positioning portion

[0039] 21: First ion exchange membrane

[0040] 21a: Upper surface

[0041] 22: Flow channel partition

[0042] 23: Second ion exchange membrane

[0043] 31: Emergency Department

[0044] 32: Ontology part

[0045] 33: Opening

[0046] 41: First seal

[0047] 42: Second sealing member

[0048] 42a: Part 1

[0049] 42b: Part 2

[0050] 43: The third seal

[0051] 44a, 44b, 44c, 44d: fourth sealing member

[0052] 51b, 51b', 51b": first electrode box

[0053] 52b, 52b', 52b": second electrode box

[0054] 53b: Third electrode box

[0055] 54b: Screw member

[0056] 71b: Limiting slide rail

[0057] 71c, 72d, 73c, 74d: Concave portion

[0058] 72c, 71d, 73d, 74c: Protruding portion

[0059] 121: Upper edge

[0060] 301: Hole

[0061] 302: Extension hole

[0062] 321: Peripheral area

[0063] 322: Internal area

[0064] 511b: First joint

[0065] 521b: Second joint

[0066] 1100: Large hole

[0067] 1102: Small hole

[0068] 2101, 2201, 2301, 3011: First group of holes

[0069] 2102, 2202, 2302, 3012: Second group of holes

[0070] A, A’: Profile line endpoints

[0071] D1: First direction

[0072] D2: Second direction

[0073] D3: Third direction

[0074] G: Plane

[0075] L1, L2, L3: Length

[0076] S1: First side

[0077] S2: Second side

[0078] T1, T2: Thickness

[0079] T3: First thickness

[0080] T4: Second thickness

[0081] W1, W2, W3: Width Detailed implementation method

[0082] The following specifically describes the structural principle and working principle of this disclosure in conjunction with the attached drawings:

[0083] Figure 1FIG. 1 is a three-dimensional schematic diagram of a cassette-type electrodialysis unit 10 according to an embodiment of the present disclosure. Figure 2 FIG. 1 is an exploded schematic diagram of a cassette-type electrodialysis unit 10 according to an embodiment of the present invention. Figure 3 FIG. 4 is a cross-sectional view of a cartridge-type electrodialysis unit 10 according to an embodiment of the present invention.

[0084] Please also refer to Figure 1 and Figure 2 The cassette-type electrodialysis unit 10 includes a housing 1, a filter membrane group 2 and a cover member 3. The filter membrane group 2 is disposed between the housing 1 and the cover member 3. Figure 1 As shown, the outer side of the containing box body 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 are not limited thereto. Unless otherwise specified hereinafter, the thickness referred to in each component is 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. Figure 1 In the present disclosure, the cartridge-type electrodialysis unit 10 is vertically arranged, for example, the length direction of the accommodating box body 1 (i.e., the second direction D2) is perpendicular to the plane G on which the cartridge-type electrodialysis unit 10 is placed (i.e., Figure 1 The first direction D1 and the third direction D3 are formed in the plane), but the present invention is not limited thereto. The cartridge-type electrodialysis unit 10 may also be arranged horizontally. For example, the length direction of the accommodating box body 1 (i.e., the second direction D2) is parallel to the placement plane G. Figures 4 to 6 shown.

[0085] Please refer to Figure 2 The housing body 1 includes a diaphragm bearing seat 11, a diaphragm limiting wall 12 and a receiving opening 13. The diaphragm limiting wall 12 is disposed around the diaphragm bearing seat 11. The receiving opening 13 is formed between the diaphragm bearing seat 11 and the diaphragm limiting wall 12. The housing body 1 is, for example, a rectangular box-shaped structure, but the present disclosure is not limited thereto.

[0086] The filter membrane group 2 is arranged on the membrane support seat 11 and abuts against the inner side of the membrane limiting wall 12. That is, the filter membrane group 2 is arranged in the accommodating port 13. The filter membrane group 2 includes a plurality of first ion exchange membranes 21 and a plurality of second ion exchange membranes 23 that are alternately arranged, and includes a plurality of flow channel partitions 22, and the flow channel partitions 22 are arranged between the first ion exchange membranes 21 and the second ion exchange membranes 23. The first ion exchange membrane 21, the second ion exchange membrane 23 and the flow channel partitions 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 (e.g., length and width) of each first ion exchange membrane 21, each second ion exchange membrane 23, and each flow channel partition 22 in the filter membrane group 2 may be the same as each other, and may correspond to the dimensions (e.g., length and width) of the receiving port 13 (or the exposed area of ​​the membrane support seat 11 defined by the membrane limiting wall 12), but are not limited thereto. The user may select a filter membrane group 2 of different sizes or different numbers of membranes according to requirements (e.g., membrane compression conditions and water purification standards in the filter membrane group 2). In some embodiments, the length L3 of the receiving port 13 may be between 40 cm and 160 cm, and the width W3 of the receiving port 13 may be between 20 cm and 80 cm, but the present disclosure is not limited thereto.

[0087] Since the size of the receiving opening 13 surrounded 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, when the first ion exchange membrane 21, the second ion exchange membrane 23 and the flow channel partition 22 are placed into the receiving opening 13 one by one, the inner side of the diaphragm limiting wall 12 can align the first ion exchange membrane 21, the second ion exchange membrane 23 and the flow channel partition 22 with each other and fix them on the diaphragm supporting seat 11, and 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, nor is there any need to spend extra manpower to align the first ion exchange membrane 21, the second ion exchange membrane 23 and the flow channel partition 22 with each other. Even a large-sized filter membrane group 2 can still be easily assembled. Compared to the comparative example of the electrodialysis unit without the membrane limiting wall, since the present disclosure has the membrane limiting wall 12, it can save time and effort when assembling the cartridge-type electrodialysis unit 10, and can more accurately align the first ion exchange membrane 21, the second ion exchange membrane 23 and the flow channel partition 22, so that the internal water leakage problem caused by the membrane position deviation can be effectively reduced, thereby eliminating the risk of mixing clean water and sewage. In some embodiments, the thickness of the membrane limiting wall 12 in the first direction D1 can be equal to or greater than the thickness of the filter membrane group 2 in the first direction D1.

[0088] In addition, after the filter membrane set 2 is arranged on the membrane support seat 11, the cover member 3 can be arranged on the receiving box body 1 and the filter membrane set 2. That is, the cover member 3 is detachably combined with the receiving box body 1, and the filter membrane set 2 is arranged between the receiving 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 a second side S2 away from the filter membrane set 2, and the first side S1 and the second side S2 are located at opposite sides of the body portion 32. The first side S1 of the body portion 32 has an outer region 321 and an inner region 322, the inner region 322 is closer to the opening 33 than the outer region 321, and the pressing portion 31 is formed on the inner region 322, for example, surrounding the opening 33. That is, the pressing portion 31 is a protruding portion on the first side S1 of the main body portion 32. In the present embodiment, the central portion of the cover member 3 has an opening 33, but the present disclosure is not limited thereto. In other embodiments, the central portion of the cover member 3 may have a plurality of openings. The size (e.g., length and width) of the pressing portion 31 may correspond to (e.g., be equal to, slightly larger than, or slightly smaller than) the size (e.g., length and width) of the filter membrane group 2. After the cover member 3 is detachably coupled to the accommodating box body 1, the pressing portion 31 may provide a one-sided pressing stress to uniformly squeeze the filter membrane group 2, so that the thickness of the filter membrane group 2 is reduced (e.g., length and width). Figure 3 As shown, compared with the comparative example of squeezing the filter membrane group by point-type pressing stress, the pressing part 31 of the present disclosure solves the problem of uneven force on the filter membrane group 2 and provides a better leak-proof effect.

[0089] Please refer to Figure 2In some embodiments, the cassette-type electrodialysis unit 10 further includes a first seal 41 and a second seal 42. The first seal 41 is disposed between the membrane support seat 11 and the filter membrane group 2. For example, the first seal 41 is conformal to the contour of the inner surface of the membrane support seat 11, and is attached to the inner surface of the membrane support seat 11, and has a size corresponding to the accommodating port 13. The second seal 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. Further, the second seal 42 includes a first portion 42a and a second portion 42b. The cover body 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, conformal 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. 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 3S corresponding to the peripheral area 321. The peripheral area 321 of the cover body 3 and the second portion 42b of the second sealing member 42 disposed thereon are used to be detachably connected to the upper edge 121 of the membrane limiting wall 12. The pressing portion 31 of the cover body 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 (such as Figure 3 The pressing portion 31 of the cover member 3 can be used to compress the filter membrane group 2 (as shown). Figure 3 As shown). In some embodiments, the first seal 41 and the second seal 42 can 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 seal 41 can provide 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 diaphragm support seat 11 and the diaphragm support seat 11. The second seal 42 can provide water tightness between the first ion exchange membrane 21 (in this embodiment, the first ion exchange membrane 21, but in other embodiments, it can be the second ion exchange membrane 23) closest to the cover body 3 and the cover body 3.

[0090] Please refer to Figure 1 and Figure 2The cover member 3 also has a plurality of holes 301 extending along a first direction D1 and a plurality of extension holes 302 extending along a second direction D2. The first direction D1 is parallel to the normal direction of the inner surface 3S, and the second direction D2 is perpendicular to the normal direction of the inner surface 3S. The holes 301 of the cover member 3 pass through the pressing portion 31 and the main body portion 32, and the extension holes 302 connect the corresponding holes 301 to the opening 33. The holes 301 of the cover member 3 include 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 (for example, the upper side and the lower side) of the opening 33. 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 extension holes 302 located on the upper side and the extension holes 302 located on the lower side are respectively connected to the first group of holes 3011 and the second group of holes 3012 which do not overlap each other in the second direction D2.

[0091] Furthermore, each first ion exchange membrane 21 includes a first group of holes 2101 and a second group of holes 2102 disposed on two opposite sides (e.g., the upper side and the lower side), each second ion exchange membrane 23 includes a first group of holes 2301 and a second group of holes 2302 disposed on two opposite sides (e.g., the upper side and the lower side), and each flow channel partition 22 includes a first group of holes 2201 and a second group of holes 2202 disposed on two opposite sides (e.g., the upper side and the lower side). The membrane support seat 11 includes a plurality of large holes 1100 and a plurality of small holes 1102, wherein the small holes 1102 are disposed on two opposite sides (e.g., the upper side and the lower side) of the large holes 1100, and the small holes 1102 include a first group of holes (not shown) disposed on the upper side of the large holes 1100 and a second group of holes 1102 disposed on the lower side of the large holes 1100.

[0092] With the assistance of the diaphragm limiting wall 12, the first group of holes (not shown) of the diaphragm supporting seat 11, the first group of holes 3011 of the cover body 3, the first group of holes 2101 of each first ion exchange membrane 21, the first group of holes 2301 of each second ion exchange membrane 23, and the first group of holes 2201 of each flow channel partition 22 can correspond to each other; the second group of holes 1102 of the diaphragm supporting seat 11, the second group of holes 3012 of the cover body 3, 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 partition 22 can correspond to each other.

[0093] Please refer to Figure 3 , the cover member 3 has an inner surface 3S corresponding to the first side S1, and in the normal direction F3 of the inner surface 3S, the thickness T1 formed by the pressing portion 31 and the main body 32 located in the inner area 322 is greater than the thickness T2 formed by the main body 32 in the outer 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 the present embodiment, before the filter membrane group 2 is compressed by the pressing portion 31, the upper surface 21a of the first ion exchange membrane 21 in the filter membrane group 2 that is farthest from the membrane support seat 11 can be coplanar with the upper edge 121 of the membrane limiting wall 12, but 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 less than the first thickness T3. The second thickness T4 has a compression percentage R with respect to the first thickness T3, and the compression percentage R = (first thickness T3 - second thickness T4) / first thickness T3, and the compression percentage R can range from 3% to 15%, for example, 7% to 10%. It can be seen from this 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 membrane limiting wall 12, and the thickness of the filter membrane group 2 are well designed, after the cover body 3 is completely covered with the accommodating box body 1, the required compression percentage R of the filter membrane group 2 can be obtained to meet the required degree of tightening of the filter membrane group 2.

[0094] In some embodiments, the number of membrane pairs formed by the first ion exchange membrane 21 and the second ion exchange membrane 23 in the filter membrane group 2 can be between 20 pairs and 50 pairs, the compression percentage R of the filter membrane group 2 can be in the range of 3% to 15%, the water flow rate of a single cartridge-type electrodialysis unit 10 can be in the range of 10LPM to 100LPM, and the desalination efficiency can be in the range of 10% to 40%, but the present disclosure is not limited thereto. It can be seen that the use of the cartridge-type electrodialysis unit 10 according to an embodiment of the present disclosure for electrodialysis can not only have the advantages of convenient assembly, precise alignment, and good water tightness, but also maintain good water flow and desalination efficiency.

[0095] Figures 4 to 6 FIG. 4 is a schematic diagram of an assembly process of a cartridge-type electrodialysis unit 10 according to an embodiment of the present disclosure.

[0096] Please refer to Figure 4 First, a receiving box body 1 is provided, 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 group 2 are placed in the receiving port 13 in sequence. In this embodiment, the top membrane in the filter membrane group 2 (i.e., the membrane farthest from the membrane support seat 11) is the first ion exchange membrane 21, and the bottom membrane is the second ion exchange membrane 23, but the present disclosure is not limited thereto.

[0097] Please refer to Figure 5 When any membrane of the first ion exchange membrane 21, the flow channel partition 22 or the second ion exchange membrane 23 is placed in the receiving port 13, since the size of the membrane support seat 11 is comparable to that of the filter membrane group 2, the membrane can be automatically modified and arranged by the membrane limiting wall 12 during the process of sliding into the receiving box body 1 so that the membrane falls to the angular position of the membrane support seat 11, so that the filter membrane group 2 is neatly placed on the membrane support seat 11, without spending manpower to adjust the position of each membrane one by one to align them. Even if the size of the filter membrane group 2 is large, it can be operated simply and quickly in the same way, thereby greatly improving the assembly efficiency and ensuring the position relationship of each membrane. Therefore, the internal water leakage problem caused by the deviation of the membrane position can be effectively reduced, thereby eliminating the risk of mixing clean water and sewage.

[0098] Please refer to Figure 6 After the filter membrane set 2 is placed in the receiving opening 13, the pressing portion 31 of the cover member 3 is directed toward the filter membrane set 2, and the cover member 3 is detachably combined with the filter membrane set 2 and the receiving box body 1. The upper edge 121 of the receiving box body 1 and the peripheral area 321 of the main body 32 of the cover member 3 and the first part 42a (not shown) of the second sealing member 42 thereon are closely fitted to each other, so that the filter membrane set 2 is compressed by the pressing portion 31. Figure 3 shown.

[0099] Figure 7 FIG. 1 is a schematic exploded view of a cassette-type electrodialysis module 10M according to an embodiment of the present disclosure. Figure 8 FIG. 1 is a three-dimensional schematic diagram of a cassette-type electrodialysis module 10M according to an embodiment of the present disclosure.

[0100] Please also refer to Figure 7 and Figure 8 The cartridge electrodialysis module 10M includes a first electrode box 51b, a second electrode box 52b, a plurality of cartridge electrodialysis units 10A and 10B, a third seal 43, two fourth seals 44a and 44b, a clamping assembly 5b and a positioning assembly 7b. The cartridge electrodialysis units 10A and 10B are disposed between the first electrode box 51b and the second electrode box 52b. The first electrode box 51b and the second electrode box 52b can be used to operate the electric field and can be used as a positive electrode or a negative electrode, respectively.

[0101] Figure 7 and Figure 8 Each of the cassette-type electrodialysis units 10A and 10B is identical to Figure 1 and Figure 2The cassette electrodialysis unit 10 shown, the same will not be repeated description. In the present embodiment, only two cassette electrodialysis units 10A and 10B are shown as examples, but the present disclosure is not limited to this. The cassette electrodialysis module 10M disclosed herein may include any number of cassette electrodialysis units, depending on the number of membrane pairs of the required anion exchange membrane and cation exchange membrane. Generally speaking, in the comparative example of only using screws to fix all anion and cation exchange membranes and electrode plates or only using screws to penetrate the pressing plate to tighten the anion and cation exchange membranes and electrode plates, the number of membrane pairs of the anion exchange membrane and the cation exchange membrane can only be 400 pairs at most, otherwise the pressing stress at the center of the anion and cation membrane stack will be too small, causing the membrane layer located in the middle to slip. In contrast, the cassette electrodialysis module 10M of the present invention may include any number of cassette electrodialysis units 10A, 10B..., and the anion exchange membrane and cation exchange membrane in each cassette electrodialysis unit 10A, 10B... may be subjected to sufficient compression stress to allow the anion and cation membrane stacks to achieve the desired compression ratio, so the cassette electrodialysis module 10M may have any number of membrane pairs of anion exchange membranes and cation exchange membranes (that is, greater than 400 pairs). Furthermore, during the electrodialysis process, if an abnormality is found in the cassette electrodialysis units 10A, 10B..., as long as the problematic cassette electrodialysis unit is processed (for example, any cassette electrodialysis unit is easily removed or replaced), the electrodialysis process does not need to be interrupted for too long. Compared with traditional electrodialysis modules, the cassette electrodialysis module 10M is more time-saving and labor-saving in terms of maintenance.

[0102] Furthermore, a third seal 43 may be provided between adjacent cassette electrodialysis units 10A and 10B to increase water tightness. In the present embodiment, the third seal 43 is conformal to the surface profile of the first side (i.e., the side away from the filter membrane group 2) of the membrane support seat 11 of the cassette electrodialysis unit 10B, and is attached to the first side (i.e., the side away from the filter membrane group 2) of the membrane support seat 11 of the cassette electrodialysis unit 10B, but the disclosed invention is not limited thereto. In other embodiments, the third seal 43 may be conformal to the surface profile of the second side (i.e., the side away from the filter membrane group 2) of the cover member 3 of the cassette electrodialysis unit 10A, and is attached to the second side (i.e., the side away from the filter membrane group 2) of the cover member 3 of the cassette electrodialysis unit 10A. In addition, the number of third seals 43 may depend on the number of cassette-type electrodialysis units. When the number of cassette-type electrodialysis units is N (N is a positive integer), the number of third seals 43 may be N-1, as long as a third seal 43 is provided between each adjacent cassette-type electrodialysis unit.

[0103] In some embodiments, the two fourth seals 44 include fourth seals 44a and 44b, and the fourth seals 44a and 44b are respectively arranged between the first electrode box 51b and the cassette electrodialysis unit 10A closest to the first electrode box 51b among the cassette electrodialysis units 10A and 10B, and between the second electrode box 52b and the cassette electrodialysis unit 10B closest to the second electrode box 52b among the cassette electrodialysis units 10A and 10B. In the present embodiment, the fourth sealing member 44a is conformal to the surface profile of the first side (i.e., the side away from the filter membrane group 2) of the membrane support seat 11 of the cartridge-type electrodialysis unit 10A, and is attached to the first side (i.e., the side away from the filter membrane group 2) of the membrane support seat 11 of the cartridge-type electrodialysis unit 10A; the fourth sealing member 44b is conformal to the surface profile of the first side (i.e., the side adjacent to the cartridge-type electrodialysis unit 10B) of the second electrode box 52b, and is attached to the first side (i.e., the side adjacent to the cartridge-type electrodialysis unit 10B) of the second electrode box 52b. B), however, the present disclosure is not limited thereto. In other embodiments, the fourth seal 44a is conformal to the contour of the surface of the second side of the first electrode box 51b (i.e., the side adjacent to the cartridge-type electrodialysis unit 10A), and is attached to the second side of the first electrode box 51b; the fourth seal 44b is conformal to the contour of the surface of the second side S2 of the cover 3 of the cartridge-type electrodialysis unit 10B (i.e., the side away from the filter membrane group 2), and is attached to the second side S2 of the cover 3 of the cartridge-type electrodialysis unit 10B (i.e., the side away from the filter membrane group 2). In this embodiment, the appearances of the two fourth seals 44a and 44b may be different from each other. In other embodiments, the appearances of the two fourth seals 44a and 44b may be the same as each other.

[0104] In some embodiments, the positioning assembly 7b is arranged on the outside of the diaphragm limiting wall 12 of the cassette electrodialysis unit 10A and 10B, the outside of the first electrode box 51b and the second electrode box 52b, so that the cassette electrodialysis unit 10A and 10B, the first electrode box 51b and the second electrode box 52b are aligned with each other. For example, the positioning assembly 7b includes a plurality of limiting slide rails 71b, a plurality of first positioning portions 72b and a plurality of second positioning portions 73b. The limiting slide rail 71b is arranged on the same side of the cassette electrodialysis unit 10A and 10B. The first positioning portion 72b is formed on the outside of the diaphragm limiting wall 12 and is correspondingly combined with the limiting slide rail 71b. The second positioning portion 73b is formed on the outside of the first electrode box 51b and the second electrode box 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 the corresponding combination of the limiting slide rail 71b and the first positioning portion 72b and the second positioning portion 73b, the cassette-type electrodialysis units 10A and 10B, the first electrode box 51b and the second electrode box 52b can be easily aligned with each other. In other embodiments, the positioning component 7b may not be disposed on the outer side of the membrane limiting wall 12 of the cassette-type electrodialysis units 10A and 10B (described in detail below).

[0105] In some embodiments, the clamping assembly 5b includes a plurality of first joints 511b, a plurality of second joints 521b, and a plurality of screw members 54b. The first joint 511b is formed on the outside of the first electrode box 51b. The second joint 521b is formed on the outside of the second electrode box 52b. The screw member 54b connects the first joint 511b and the second joint 521b respectively, so that the first electrode box 51b, the cassette-type electrodialysis units 10A and 10B, and the second electrode box 52b are fixed to each other. Since the filter membrane group 2 in each cassette-type electrodialysis unit 10A and 10B of the present invention has achieved the desired compression ratio, the clamping assembly 5b only needs to apply a lower force to tighten the first electrode box 51b, the cassette-type electrodialysis units 10A and 10B, and the second electrode box 52b to meet the watertightness requirements of the cassette-type electrodialysis module 10M.

[0106] In some embodiments, the clamping assembly 5b may not include the first joint portion 511b, the second joint portion 521b and the screw member 54b. On the contrary, the clamping assembly 5b may include fixing members (not shown) respectively disposed on the outside of the first electrode box 51b, the outside of the second electrode box 52b and the outside of the cassette electrodialysis units 10A and 10B. By correspondingly combining the fixing members on any two adjacent first electrode boxes 51b, cassette electrodialysis units 10A and 10B and second electrode boxes 52b, the first electrode box 51b, the second electrode box 52b and the cassette electrodialysis units 10A and 10B can be pressed and fixed to meet the watertightness requirements of the cassette electrodialysis module 10M. The fixing member is, for example, a buckle, a latch or other suitable fixing member (not shown).

[0107] In some implementations, rollers (not shown) may be disposed below the first electrode box 51b, the second electrode box 52b, and the cartridge-type electrodialysis units 10A and 10B, respectively, so that the first electrode box 51b, the second electrode box 52b, and the cartridge-type electrodialysis units 10A and 10B can be moved in a more convenient manner.

[0108] Fig. 9 1 is a side view of a cassette electrodialysis module 10N according to another embodiment of the present disclosure. The difference between the cassette electrodialysis module 10N and the cassette electrodialysis module 10M lies in the number of cassette electrodialysis units and the number of electrode cartridges, and other similarities will not be described again.

[0109] Please refer to Fig. 9 The cartridge-type electrodialysis module 10N includes a first electrode cartridge 51b, a second electrode cartridge 52b, a third electrode cartridge 53b, a plurality of cartridge-type electrodialysis units 10A, 10B, 10C, 10D, ..., a plurality of third seals 43, four fourth seals 44a, 44b, 44c and 44d, a clamping assembly 5b (shown in FIG. Figure 8 ) and a positioning assembly 7b (shown in Figure 8). However, the present disclosure is not limited to this, and in other embodiments, the cassette electrodialysis module 10N may not include the clamping assembly 5b. The structure of each cassette electrodialysis unit 10A, 10B, 10C, 10D... is the same as that of the cassette electrodialysis unit 10. The third electrode box 53b is disposed between the first electrode box 51b and the second electrode box 52b, and is inserted into the cassette electrodialysis unit 10A, 10B, 10C, 10D... For example, the third electrode box 53b is disposed between the cassette electrodialysis units 10C and 10D. The first electrode box 51b, the second electrode box 52b and the third electrode box 53b can be used to operate the electric field. When the number of cassette electrodialysis units 10A, 10B, 10C, 10D... increases, the distance between the first electrode box 51b and the second electrode box 52b also increases. If the distance between the first electrode box 51b and the second electrode box 52b is too far, the current efficiency (equivalent to the desalination efficiency) during the desalination reaction may decrease. Therefore, when the amount of water to be treated increases, so that the required number of cartridge-type electrodialysis units 10A, 10B, 10C, 10D... increases, the third electrode box 53b can be inserted into the cartridge-type electrodialysis units 10A, 10B, 10C, 10D..., so that the distance between the two electrodes is maintained at an optimal state, so that good current efficiency and desalination performance can be maintained.

[0110] The third seal 43 is disposed between each of two adjacent cassette electrodialysis units 10A, 10B, 10C, 10D ... The four fourth seals include fourth seals 44a, 44b, 44c and 44d. The fourth seals 44a, 44b, 44c and 44d are respectively disposed between the first electrode box 51b and the cassette electrodialysis unit 10A, between the second electrode box 52b and the cassette electrodialysis unit 10B, between the third electrode box 53b and the cassette electrodialysis unit 10C, and between the third electrode box 53b and the cassette electrodialysis unit 10D.

[0111] Fig. 10A FIG. 4 is a perspective diagram of a second side of a cassette-type electrodialysis unit 20 according to another embodiment of the present disclosure. Fig. 10B FIG. 4 is a perspective diagram of a first side of a cassette-type electrodialysis unit 20 according to another embodiment of the present disclosure.

[0112] The structure of the cassette electrodialysis unit 20 is similar to that of the cassette electrodialysis unit 10A, and the cassette electrodialysis unit 20 is further provided with a first positioning portion 17c. The same and / or similar elements are marked with the same and / or similar element numbers, and the repeated parts will not be described in detail again.

[0113] Please refer to Fig. 10A and Fig. 10BThe cassette-type electrodialysis unit 20 includes a housing 1A, a filter membrane group 2, and a cover member 3A. The first positioning portion 17c is disposed on a first side (corresponding to the first side S1) and a 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 disposed on the second side and a protruding portion 72c disposed on the first side. For example, the recessed portion 71c is disposed on the second side of the cover member 3A, and passes through a portion of the cover member 3A from the second side of the cover member 3A toward the diaphragm support seat 11, surrounding the opening 33, the first group of holes 3011 and a second group of holes 3012; the protruding portion 72c is disposed on the first side of the accommodating box body 1A (that is, the first side of the diaphragm support seat 11), and protrudes from the first side of the diaphragm support seat 11 toward a direction away from the cover member 3A, surrounding 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 present disclosure is not limited to this. The recessed portion 71c and the protruding portion 72c disposed on two adjacent cassette-type electrodialysis units 20 can be correspondingly engaged with each other (shown in Fig.12 ), so the multiple cassette-type electrodialysis units 20 can be positioned relative to each other through the corresponding first positioning portions 17c (i.e., the recessed portion 71c and the protruding portion 72c).

[0114] Fig.11A FIG. 4 is a perspective diagram of a second side of a cassette-type electrodialysis unit 30 according to another embodiment of the present disclosure. Fig. 11B FIG. 4 is a perspective diagram of a first side of a cassette-type electrodialysis unit 30 according to another embodiment of the present disclosure.

[0115] The structure of the cassette electrodialysis unit 30 is similar to that of the cassette electrodialysis unit 10A, and a first positioning portion 17d is additionally provided on the cassette electrodialysis unit 30. The same and / or similar elements are marked with the same and / or similar element numbers, and the repeated parts will not be described in detail again.

[0116] Please refer to Fig.11A and Fig. 11BThe cassette-type electrodialysis unit 30 includes a housing 1B, a filter membrane group 2, and a cover member 3B. The first positioning portion 17d is disposed on a first side (corresponding to the first side S1) and a 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 disposed on the second side and a recessed portion 72d disposed on the first side. For example, the protrusion 71d is disposed on the second side of the cover member 3B, protruding from the second side of the cover member 3B toward a direction away from the diaphragm carrier 11, surrounding the opening 33, the first group of holes 3011 and a second group of holes 3012 (as viewed from the second side); the recessed portion 72d is disposed on the first side of the accommodating box body 1B (that is, the first side of the diaphragm carrier 11), passing through a portion of the diaphragm carrier 11 from the first side of the diaphragm carrier 11 toward the cover member 3B, surrounding the large hole 1100 and the small hole 1102. The recessed portion 72d and the protrusion 71d are, for example, respectively closed rectangles, but the present disclosure is not limited thereto. The recessed portion 72d and the protrusion 71d disposed on two adjacent cassette-type electrodialysis units 30 may be correspondingly engaged with each other (as shown in Fig.13 ), so the multiple cassette-type electrodialysis units 30 can be positioned with each other through the corresponding first positioning portions 17d (i.e., the protruding portion 71d and the recessed portion 72d).

[0117] Fig.12 1 is a perspective view 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, and the style of the positioning component is different, and other identical components will not be described repeatedly. In other embodiments, the cassette-type electrodialysis module 20M may have a clamping component.

[0118] Please refer to Fig.12 The cartridge electrodialysis module 20M includes a first electrode cartridge 51b', a second electrode cartridge 52b', a plurality of cartridge electrodialysis units 20A and 20B, and a positioning assembly 7c. The cartridge electrodialysis units 20A and 20B are disposed between the first electrode cartridge 51b' and the second electrode cartridge 52b'. The cartridge electrodialysis units 20A and 20B are respectively the same as Fig. 10A and Fig. 10B The electrodialysis cartridge unit 20 is shown. The electrodialysis cartridge module 20M may include any number of electrodialysis cartridge units.

[0119] The positioning assembly 7c is disposed on a first side (corresponding to the first side of the first electrode box 51b') and a second side (corresponding to the second side of the second electrode box 52b') of each cassette electrodialysis unit 20A and 20B, the first side of each cassette electrodialysis unit 20A and 20B is relative to the second side of each cassette electrodialysis unit 20A and 20B, and among two adjacent cassette electrodialysis units 20A and 20B, the second side of the cassette electrodialysis unit 20A may be adjacent to the first side of the cassette electrodialysis unit 20B. Further, the positioning assembly 7c includes a plurality of first positioning portions 17c disposed on the cassette electrodialysis units 20A and 20B and a plurality of second positioning portions 27c disposed on the first electrode box 51b' and the second electrode box 52b', so that the cassette electrodialysis units 20A and 20B, the first electrode box 51b' and the second electrode box 52b' are aligned with each other.

[0120] For example, the first positioning portion 17c includes a protrusion 72c disposed on the first side of each cartridge electrodialysis unit 20A and 20B and a recessed portion 71c disposed on the second side of each cartridge electrodialysis unit 20A and 20B, and the protrusion 72c of the adjacent cartridge electrodialysis units 20A and 20B is correspondingly combined with the recessed portion 71c. The second positioning portion 27c is disposed on a side of the first electrode box 51b' adjacent to the cartridge electrodialysis units 20A and 20B and on a side of the second electrode box 52b' adjacent to the cartridge electrodialysis units 20A and 20B, and 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 recessed portion 73c disposed on the first electrode box 51b' and a protrusion 74c disposed on the second electrode box 52b'.

[0121] In this embodiment, the recessed portion 73c of the first electrode box 51b' is engaged with the protruding portion 72c of the cartridge-type electrodialysis unit 20A; the recessed portion 71c of the cartridge-type electrodialysis unit 20A is engaged with the protruding portion 72c of the cartridge-type electrodialysis unit 20B; and the recessed portion 71c of the cartridge-type electrodialysis unit 20B is engaged with the protruding portion 74c of the second electrode box 52b'.

[0122] Fig.13 1 is a perspective view 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 style of the positioning component is different, and other identical components will not be described repeatedly. In other embodiments, the cassette-type electrodialysis module 30M may have a clamping component.

[0123] Please refer to Fig.13The cartridge electrodialysis module 30M includes a first electrode cartridge 51b", a second electrode cartridge 52b", a plurality of cartridge electrodialysis units 30A and 30B, and a positioning assembly 7d. The cartridge electrodialysis units 30A and 30B are disposed between the first electrode cartridge 51b" and the second electrode cartridge 52b". The cartridge electrodialysis units 30A and 30B are respectively the same as Fig.11A and Fig. 11B The electrodialysis cartridge unit 30 is shown. The electrodialysis cartridge module 30M may include any number of electrodialysis cartridge units.

[0124] The positioning component 7d is disposed on a first side (corresponding to the first side of the first electrode box 51b”) and a second side (corresponding to the second side of the second electrode box 52b”) of each cassette electrodialysis unit 30A and 30B, the first side of each cassette electrodialysis unit 30A and 30B is relative to the second side of each cassette electrodialysis unit 30A and 30B, and among two adjacent cassette electrodialysis units 30A and 30B, the second side of the cassette electrodialysis unit 30A may be adjacent to the first side of the cassette electrodialysis unit 30B. Further, the positioning component 7d includes a plurality of first positioning portions 17d disposed on the cassette electrodialysis units 30A and 30B and a plurality of second positioning portions 27d disposed on the first electrode box 51b” and the second electrode box 52b”, so that the cassette electrodialysis units 30A and 30B, the first electrode box 51b” and the second electrode box 52b” are aligned with each other.

[0125] For example, the first positioning portion 17d includes a recessed portion 72d disposed on the first side of each cassette electrodialysis unit 30A and 30B and a protruding portion 71d disposed on the second side of each cassette electrodialysis unit 30A and 30B, and the protruding portions 71d of adjacent cassette electrodialysis units 30A and 30B are correspondingly combined with the recessed portions 72d. The second positioning portion 27d is disposed on a side of the first electrode box 51b" adjacent to the cassette electrodialysis units 30A and 30B and on a side of the second electrode box 52b" adjacent to the cassette electrodialysis units 30A and 30B, and the second positioning portion 27d and the corresponding first positioning portion 17d are correspondingly combined with each other. The second positioning portion 27d includes a protruding portion 73d disposed on the first electrode box 51b" and a recessed portion 74d disposed on the second electrode box 52b".

[0126] In this embodiment, the protrusion 73d of the first electrode box 51b" is engaged with the recessed portion 72d of the cartridge-type electrodialysis unit 30A; the protrusion 71d of the cartridge-type electrodialysis unit 30A is engaged with the recessed portion 72d of the cartridge-type electrodialysis unit 30B; and the protrusion 71d of the cartridge-type electrodialysis unit 30B is engaged with the recessed portion 74d of the second electrode box 52b".

[0127] In some embodiments, the cartridge-type electrodialysis modules 20M and 30M may each include a third electrode cartridge.

[0128] It should be understood that different features of the above-mentioned embodiments of the present disclosure may be combined with each other.

[0129] The present disclosure provides a cassette-type electrodialysis unit and a cassette-type electrodialysis module. The cassette-type electrodialysis unit includes a containing box body, a filter membrane group and a cover body. The containing box body includes a membrane support seat, a membrane limiting wall and a containing port. The membrane limiting wall is arranged around the membrane support seat. The containing port is formed between the membrane support seat and the membrane limiting wall. The filter membrane group is arranged on the membrane support seat and abuts against the inner side of the membrane limiting wall. 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. The flow channel partition is arranged between the first ion exchange membrane and the second ion exchange membrane. The cover member is arranged on the accommodating box body, and the cover member includes at least one opening, a main body and a pressing portion, wherein at least one opening passes through the main body, and the main body has an outer area and an inner area on a first side adjacent to the filter membrane group, the inner area is closer to the opening than the outer area, and the pressing portion is formed on the inner area.

[0130] Compared to the comparative example of the dialysis unit without the membrane limiting wall, since the cartridge-type electrodialysis unit disclosed in the present invention has the membrane limiting wall, the first ion exchange membrane, the second ion exchange membrane and the flow channel partition can be easily aligned with each other and fixed on the membrane support seat during the process of stacking the filter membrane group. There is no need to spend extra manpower to align the first ion exchange membrane, the second ion exchange membrane and the flow channel partition with each other. Even a large-sized filter membrane group can still be easily assembled. Therefore, it is more time-saving and labor-saving to assemble the cartridge-type electrodialysis unit, and the first ion exchange membrane, the second ion exchange membrane and the flow channel partition can be aligned more accurately. This can effectively reduce the internal water leakage problem caused by the deviation of the membrane position, thereby eliminating the risk of mixing clean water and sewage. In addition, compared to the comparative example without the pressing part, since the cartridge-type electrodialysis unit disclosed in the present invention has the pressing part arranged on the cover body, a pressing stress can be uniformly applied to the filter membrane group when the cover body is combined with the accommodating box body, so that the filter membrane group can achieve the required membrane compression ratio in a simple manner. In addition to improving the problem of uneven force when compressing the filter membrane group, it can provide a better leak-proof effect.

[0131] Of course, the present disclosure may have many other embodiments. Without departing from the spirit and essence of the present disclosure, technicians familiar with the field can make various corresponding changes and modifications based on the present disclosure, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present disclosure.

Claims

1. A cartridge-type electrodialysis unit, comprising a housing, a filter membrane assembly and a cover member, The accommodating box body, include: a diaphragm bearing seat; a diaphragm limiting wall, the diaphragm limiting wall is disposed around the diaphragm supporting seat; and An accommodating opening is formed between the diaphragm bearing seat and the diaphragm limiting wall; The filter membrane set is arranged on the membrane bearing seat and contacts the inner side of the membrane limiting wall, and the filter membrane set includes: A plurality of first ion exchange membranes and a plurality of second ion exchange membranes are alternately arranged; and a plurality of flow channel partitions, disposed between the plurality of first ion exchange membranes and the plurality of second ion exchange membranes; and The cover is disposed on the accommodating box body, and includes at least one opening, a main body, and a pressing portion, wherein the at least one opening passes through the main body, and the main body has a peripheral area and an inner area adjacent to a first side of the filter membrane assembly, the inner area is closer to the at least one opening than the peripheral area, and the pressing portion is formed on the inner area; The cover body has an inner surface corresponding to the first side, a plurality of holes extending along a first direction, and a plurality of extension holes extending along a second direction, wherein 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 plurality of holes of the cover body pass through the pressing portion and the main body, and the plurality of extension holes connect the corresponding plurality of holes to the at least one opening.

2. The cassette-type electrodialysis unit according to claim 1, further comprising: include: A first sealing member is disposed between the membrane support seat and the filter membrane assembly; as well as A second sealing member is arranged between the pressing portion and the filter membrane group and between the peripheral area and the membrane limiting wall.

3. A cassette-type electrodialysis unit as described in 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 thickness formed by the pressing portion and the main body portion located in the inner area is greater than the thickness formed by the main body portion in the outer area. 4 . The cassette-type electrodialysis unit of claim 1 , wherein the pressing portion surrounds the at least one opening.

5. The cassette-type electrodialysis unit according to claim 1, in: Before the filter membrane set is compressed by the pressing portion, the filter membrane set has a first thickness; and After the filter membrane group is compressed by the pressing portion, the filter membrane group has a second thickness, wherein the second thickness is smaller than the first thickness. 6 . The cassette-type electrodialysis unit of 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%.

7. The cassette-type electrodialysis unit of claim 1, wherein the plurality of holes of the cover member comprises a first group of holes and a second group of holes, the first group of holes and the second group of holes are formed on two opposite sides of the at least one opening, the plurality of holes in the first group of holes are separated from each other along a third direction, the plurality of holes in the second group of holes are separated from each other along the third direction, the third direction is perpendicular to the first direction and the second direction, wherein In the second direction, the plurality of extension holes connected to the plurality of holes in the first group of holes are separated from the plurality of extension holes connected to the plurality of holes in the second group of holes.

8. The cassette-type electrodialysis unit of claim 1, wherein the plurality of holes of the cover member comprises a first group of holes and a second group of holes, the first group of holes and the second group of holes of the cover member are formed on two opposite sides of the at least one opening, wherein 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 partitions includes a first group of holes and a second group of holes, and The first group of holes of the cover body, the first group of holes of each first ion exchange membrane, the first group of holes of each second ion exchange membrane, and the first group of holes of each flow channel partition correspond to each other; the second group of holes of the cover body, the second group of holes of each first ion exchange membrane, the second group of holes of each second ion exchange membrane, and the second group of holes of each flow channel partition correspond to each other.

9. A cassette-type electrodialysis module, include: A plurality of cassette-type electrodialysis units as claimed in claim 1 and a positioning assembly, The positioning assembly is arranged on the outer side of the membrane limiting wall so that the multiple cassette-type electrodialysis units are aligned with each other.

10. The electrodialysis cartridge module of claim 9, wherein each electrodialysis cartridge unit further comprises include: a first sealing member, disposed between the membrane support seat and the filter membrane assembly; and A second sealing member is arranged between the pressing portion and the filter membrane group and between the peripheral area and the membrane limiting wall. 11 . The cassette-type electrodialysis module of claim 10 , further comprising a third seal disposed between the plurality of cassette-type electrodialysis units.

12. The cassette-type electrodialysis module of claim 9, wherein the positioning component is include: A plurality of limit slide rails are arranged on the same side of the plurality of cassette-type electrodialysis units; as well as A plurality of first positioning portions are formed on the outer side of the diaphragm limiting wall and are correspondingly combined with the plurality of limiting slide rails.

13. The cassette-type electrodialysis module according to claim 11, further comprising: include: a first electrode box and a second electrode box, wherein the plurality of cartridge-type electrodialysis units are disposed between the first electrode box and the second electrode box; and Two fourth seals are respectively arranged between the first electrode box and the cassette-type electrodialysis unit that is closest to the first electrode box among the plurality of cassette-type electrodialysis units, and between the second electrode box and the cassette-type electrodialysis unit that is closest to the second electrode box among the plurality of cassette-type electrodialysis units. 14 . The cartridge-type electrodialysis module as claimed in claim 13 , further comprising a third electrode box, the third electrode box being disposed between the first electrode box and the second electrode box and inserted into the plurality of cartridge-type electrodialysis units.

15. The cartridge-type electrodialysis module of claim 13, wherein the positioning component is include: A plurality of limit slide rails are arranged on the same side of the plurality of cassette-type electrodialysis units; A plurality of first positioning portions are formed outside the diaphragm limiting wall and are correspondingly combined with the plurality of limiting slide rails; and A plurality of second positioning parts are formed on the outer sides of the first electrode box and the second electrode box and are correspondingly combined with the plurality of limiting slide rails.

16. The cartridge-type electrodialysis module of claim 13, further comprising a clamping assembly, the clamping assembly include: A plurality of first coupling portions are formed on the outer side of the first electrode box; A plurality of second combining portions are formed on the outer side of the second electrode box; as well as A plurality of screw members are respectively connected to the plurality of first connecting parts and the plurality of second connecting parts, so that the first electrode box, the plurality of cassette-type electrodialysis units and the second electrode box are fixed to each other.

17. A cassette-type electrodialysis module, include: A plurality of cassette-type electrodialysis units as claimed in claim 1 and a positioning assembly, The positioning assembly is disposed 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 the second side of each of the cassette-type electrodialysis units.

18. A cassette-type electrodialysis module as described in claim 17, wherein the positioning assembly further includes a plurality of first positioning portions, the plurality of first positioning portions including a recessed portion disposed on the first side of each of the cassette-type electrodialysis units and a protruding portion disposed on the second side of each of the cassette-type electrodialysis units, the recessed portions and the protruding portions of adjacent cassette-type electrodialysis units being correspondingly combined.

19. The cartridge-type electrodialysis module of claim 18, further comprising a first electrode box and a second electrode box, wherein the plurality of cartridge-type electrodialysis units are disposed between the first electrode box and the second electrode box; The positioning assembly further includes a plurality of second positioning portions, which are arranged on a side of the first electrode box adjacent to the plurality of cassette-type electrodialysis units and on a side of the second electrode box adjacent to the plurality of cassette-type electrodialysis units, and the plurality of second positioning portions are correspondingly combined with the plurality of first positioning portions.

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