JP2016193422A - Electrodialyzer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electrodialyzer for executing an efficient electrodialysis, by preventing liquid leakage, properly securing flow passage resistance of a distributor, and minimally restraining a pressure loss, in the present invention.SOLUTION: A chamber frame comprises a net body part disposed in a central position and a frame part positioned around the net body part, and the frame part includes a supply liquid port, a discharge liquid port and a distributor having a flow passage. The flow passage is respectively disposed between the supply liquid port and the net body part and between the discharge liquid port and the net body part, and an opening part is respectively provided in alternate arrangement in the flow passage in at least one place or more of one side surface and in at least two places or more of the other side surface.SELECTED DRAWING: Figure 3

Description

  The present invention relates to an electrodialysis apparatus.

  Currently, electrodialyzers using ion exchange membranes are stacked by alternately stacking cation exchange membranes and anion exchange membranes with the chamber frame in between, arranging them between the electrodes, and tightening both ends with clamping frames. Further, the concentrating chamber and the desalting chamber are alternately formed.

  A chamber frame used in such an electrodialysis apparatus includes a net body portion that maintains a gap between the cation exchange membrane and the anion exchange membrane at a central position, and a frame portion that has a net attachment opening for arranging the net body portion. It is common to have

  In particular, a distributor having a supply liquid port, a discharge liquid port, and a flow path is attached to the frame portion. As such a distributor 72, as shown in FIGS. 6A to 6C, a flow path 73 is formed in a groove shape whose one side surface is open, and the processing liquid introduced from the supply liquid port 71 passes through the flow path 73. And the thing of the structure which flows out into the net attachment opening part 74 by which the net main-body part 75 is arrange | positioned is the mainstream. Reference numeral 70 denotes a frame portion.

  A distributor in which a channel is formed in a hollow shape (tunnel type) is also known (for example, see Patent Document 1).

  In addition, as shown in FIG. 7, a distributor 720 in which an upper flow path 731, a connection flow path 732, and a lower flow path 733 are arranged has also been proposed (see, for example, Patent Document 2). Reference numeral 700 denotes a frame part, reference numeral 800 denotes an ion exchange membrane, reference numeral 710 denotes a supply liquid port, reference numeral 740 denotes a net mounting opening, and reference numeral 750 denotes a net body part.

Chinese Patent Publication CN102910713A Chinese Patent Publication CN102267747A

  However, since one side surface of the flow path 73 of the distributor 72 shown in FIGS. 6A and 6B is open along the flow path length, the flow path 73 is adjacent to the opened portion as shown in FIGS. 6B and 6C. The ion exchange membrane 80 enters. As a result, there is a problem that a gap S is formed on the opposite side surface of the ion exchange membrane 80, and a liquid (treatment liquid or electrolytic solution) leaks into the gap S to cause a liquid leak. In that respect, since the distributor of Patent Document 1 has a hollow flow path, there is no possibility of liquid leakage. However, since the distributor of Patent Document 1 has a hollow flow path, the flow path resistance is reduced.

  As described above, the electrodialysis apparatus has a configuration in which a plurality of chamber frames sandwiched between a cation exchange membrane and an anion exchange membrane are stacked, and a desalting chamber and a concentration chamber are alternately formed. Then, a liquid (treatment liquid or electrolytic solution) flows into the chamber frame disposed in the desalination chamber or the concentration chamber from the supply liquid port, and flows into the net body through the distributor flow path.

  Therefore, in particular, when the flow path resistance is small in the distributor of the chamber frame disposed in the desalting chamber, the processing liquid does not flow into each chamber frame disposed in the plurality of desalting chambers in a balanced manner. It will flow into the room frame placed on the side. If the treatment solution or electrolyte does not flow into the chambers of the multiple desalination chambers or concentration chambers in a well-balanced manner, a single flow of current occurs, and in a chamber where the liquid flow is poor, ion supply to the ion exchange membrane is performed for the flowing current. May not catch up, causing problems such as voltage rise and scale generation, which may cause a problem that energization stops.

  Further, the distributor of Patent Document 1 has a large pressure loss because the flow path has a hollow shape. That is, the filter press type electrodialysis apparatus is configured by pressurizing a plurality of chamber frames sandwiched between a cation exchange membrane and an anion exchange membrane. Therefore, if the flow path has a hollow shape, pressure may be applied to the entire flow path, resulting in deformation and pressure loss. As a result, a single flow of current occurs, which also causes a problem such as a rise in voltage and generation of a scale, resulting in a problem that energization stops.

  Further, since the distributor 720 of Patent Document 2 has two stages of flow paths, an upper flow path 731 and a lower flow path 733, the ion exchange membrane 800 enters half of the flow path as shown in FIG. As a result, the electrolytic solution tends to leak into the adjacent ion exchange chamber.

  Furthermore, since the distributor 720 of Patent Document 2 has a narrow flow path width of 0.2 to 0.8 mm, when attempting to flow a necessary flow rate in the chamber frame, the pressure loss is abnormally high, and the pump power cost In addition, it is easy to cause problems such as an external leak in which the electrolyte leaks outside the ion exchange chamber and an internal leak in which the electrolyte leaks to the adjacent ion exchange chamber.

  In view of the above points, an object of one embodiment of the present invention is to prevent liquid leakage, appropriately ensure the flow path resistance of the distributor, and perform efficient electrodialysis while minimizing pressure loss. It is to provide an electrodialysis apparatus.

In view of the above problems, an electrodialysis apparatus according to an embodiment of the present invention has the following configuration. That is,
An electrodialyzer comprising a concentration chamber and a desalting chamber by alternately arranging a plurality of cation exchange membranes and anion exchange membranes with a chamber frame interposed between a cathode plate and an anode plate,
The chamber frame includes a net main body portion disposed at a central position, and a frame portion positioned around the net main body portion,
The frame portion includes a supply liquid port, a discharge liquid port, and a distributor having a flow path,
The flow path is disposed between the supply liquid port and the net body part, and between the discharge liquid port and the net body part,
In the flow path, openings are alternately arranged in at least one place on one side and in at least two places on the other side.

  According to one embodiment of the present invention, it is possible to provide an electrodialysis apparatus that can prevent liquid leakage, appropriately ensure the flow path resistance of the distributor, and perform efficient electrodialysis while minimizing pressure loss. .

It is a schematic plan view of the chamber frame used for the electrodialysis apparatus which concerns on one Embodiment of this invention. It is an enlarged plan view of the distributor shown in FIG. It is a cross-sectional view of the distributor shown in FIG. 2A. (A) is a cross-sectional view taken along the line II-II in FIG. 2A, (b) is a cross-sectional view taken along the line III-III in FIG. 2A, and (c) is a cross-sectional view taken along the line IV-IV in FIG. FIG. FIG. 2B is a longitudinal sectional view taken along the arrow I-I in FIG. 2A. It is a sectional side view which shows typically the liquid flow of the distributor arrange | positioned at the electrodialysis apparatus concerning one Embodiment of this invention. 1 is an assembly diagram showing a schematic side cross-sectional structure of an electrodialysis apparatus according to an embodiment of the present invention. It is explanatory drawing explaining the structure of the conventional distributor. A is a partially enlarged plan view, B is a cross-sectional view taken along line VV of A, and C is a side cross-sectional view schematically illustrating the liquid flow of the distributor. It is explanatory drawing explaining a structure of the conventional distributor. It is an enlarged plan view of the distributor shown in FIG. It is a VI-VI arrow longitudinal cross-sectional view of FIG.

<Room frame structure>
FIG. 1 shows a schematic plan view of a chamber frame used in an electrodialysis apparatus 10 according to an embodiment of the present invention. The chamber frame 1 used in the present invention has a frame portion 3 formed in a frame shape having a net attachment opening 4 at a central position, and a net main body 2 arranged in the net attachment opening 4. The net body 2 is preferably composed of a net formed by thermally welding the intersections by the netron method. Moreover, it is preferable that the frame part 3 and the net body part 2 are integrated by welding or the like.

  Roughly speaking, the electrodialysis apparatus 10 has the chamber frames 1 and the ion exchange membranes (anion exchange membrane A and cation exchange membrane C) alternately arranged as described above, and the ion exchange membranes interposed between the chamber frames 1. It is comprised by pinching. That is, in the chamber frame 1, a space secured by the net body portion 2 installed in the net attachment opening 4 of the frame portion 3 is an ion exchange chamber. The net body 2 is disposed in a rectangular net attachment opening 4 formed at the center position of the chamber frame 1 and has a function as a spacer of the flow path, and ensures contact between adjacent ion exchange membranes. To prevent.

  The net body 2 is preferably made of thermoplastic plastic. For example, as shown in FIG. 1, the welded portions J and K are arranged at two locations in the longitudinal direction around the net mounting opening 4 of the chamber frame 1, and the width direction. On the other hand, the welded portions L and M are welded by high frequency dielectric heating and attached to the frame portion 3.

  The frame part 3 described above is preferably manufactured from a sheet made of thermoplastic or synthetic rubber.

  Further, the frame portion 3 is preferably formed with a rib 30 on one side (the front side in the illustrated example), and the rib 30 is formed in a net shape having an angle of 45 degrees with the outer edge of the chamber frame 1. It is preferable. The rib 30 is easily manufactured, for example, by molding with a dip roll having a grid-like engraving when manufacturing a sheet made of thermoplastic or synthetic rubber. The lattice-shaped engraving form of the sheet with rib-shaped ribs of the dip roll is preferably a triangular engraving in a cross-sectional view with a width of 100 to 300 μm and a depth of 60 to 200 μm, and the pitch of the lattice is preferably 2 to 10 mm. The latticed ribbed sheet thus manufactured is cut into a frame shape having a predetermined size and used as the frame portion 3. Incidentally, the other surface side (the back surface in the illustrated example) is preferably a smooth surface. When a plurality of the ribs 30 are stacked with the ion exchange membrane sandwiched between the ribs 30, the adjacent ion exchange membranes are restrained in a linear form, so that the electrolyte leaks out of the ion exchange chamber (hereinafter also referred to as external leakage). To prevent leakage into the adjacent ion exchange chamber (hereinafter also referred to as internal leakage).

  Further, the frame portion 3 is provided with a supply liquid port 5 and a discharge liquid port 6. The supply liquid port 5 and the discharge liquid port 6 are communicated with the net attachment opening 4 via a communication port 7 and a communication port 8, respectively. A distributor 9 for securing a liquid flow path is fitted in each of the communication port 7 and the communication port 8. A plurality of flow paths 90 are formed in the distributor 9. The distributor 9 on the supply liquid port 5 side communicates the supply liquid port 5 with the net mounting opening 4 (net body 2), and the distributor 9 on the discharge liquid port 6 side communicates with the discharge liquid port 6 and the net. The attachment opening 4 (net body 2) is communicated.

  The distributor 9 is preferably made of a thermoplastic plastic, has excellent heat resistance and liquid dispersibility, and has a structure that prevents internal leakage. The distributor 9 is preferably manufactured by injection molding. The thickness is preferably 0.4 to 2 mm, and the total length (length) is preferably 20 mm to 60 mm.

  Next, the configuration of the distributor 9 will be specifically described with reference to FIGS. FIG. 2A shows an enlarged plan view of the distributor disposed in the chamber frame. 2B shows a cross-sectional view of the distributor shown in FIG. 2A, (a) is a cross-sectional view taken along the line II-II in FIG. 2A, (b) is a cross-sectional view taken along the line III-III in FIG. c) shows a cross-sectional view taken along the line IV-IV in FIG. 2A. FIG. 3 shows a longitudinal sectional view taken along the line II in FIG. 2A.

  As illustrated, the distributor 9 has a plurality of flow paths 90 in the width direction. The flow path 90 of the distributor 9 disposed on the side of the supply liquid port 5 allows the liquid flowing from the supply liquid port 5 (hereinafter, referred to as a processing liquid or an electrolytic solution) to flow through the net disposed in the net attachment opening 4. It flows out to the main body 2 (ion exchange chamber). The distributor 9 disposed on the discharge liquid port 6 side causes the liquid flowing in from the net body 2 (ion exchange chamber) of the net mounting opening 4 to flow out to the discharge liquid port 6. The cross-sectional shape of the channel 90 is preferably rectangular or elliptical.

  As shown in FIG. 3, the channel 90 is provided with openings 910 that open to the front F side of the channel 90 and openings 920 that open to the back B side. Therefore, the liquid passing through the flow channel 90 having the above configuration rises or falls while meandering in the left and right directions in the flow channel 90 in FIG.

  That is, the flow path 90 of this embodiment is a structure by which favorable flow path resistance is obtained by forming the opening parts 910 and 920 alternately in the front F side and the back surface B side.

  Moreover, it can be formed thinner than a distributor having a conventional hollow channel. In order to form the flow path in a hollow shape, it is necessary to bond and form two sheet materials having recesses that form the flow path, and thus the thickness is about 1 mm. On the other hand, since the distributor 9 of this embodiment can be formed by injection molding, the thickness can be about 0.4 mm to 0.6 mm. Although the thickness of the distributor 9 depends on the thickness of the chamber frame 1, it is preferable that the thickness of the chamber frame 1 is thin in consideration of reduction of electric resistance and reduction of liquid circulation power. Therefore, if the distributor can be made thinner, it is possible to reduce electric resistance and liquid circulation power.

  The lengths of the openings 910 and 920 of the channel 90 are preferably 10% to 33% of the total length of the channel 90. By setting the lengths of the openings of the openings 910 and 920 within this range, it is possible to prevent the ion exchange membrane from entering deeply into the openings 910 and 920 and to prevent the occurrence of liquid leakage.

  Further, the flow path 90 is disposed so that the lower end portion of the opening portion 920 provided on the back surface B side from the upper side of FIG. 3 and the upper end portion of the opening portion 910 provided on the front surface F side overlap with each other. 94 is preferably formed. Similarly, the through-hole 94 is formed such that the lower end portion of the opening portion 910 provided on the front surface F side and the upper end portion of the opening portion 920 provided on the back surface B side are overlapped. preferable.

  By this through portion 94, the pressure loss in the flow path 90 can be greatly reduced. The length of the through-hole 94 in the flow path direction is preferably 2 mm to 6 mm. The length in the flow path direction refers to the vertical direction in FIGS. The number of through portions 94 formed in the flow path direction of the flow path 90 is preferably 2 to 8 per flow path. The number of the through portions 94 is appropriately changed depending on the total length of the distributor 9, the widths of the openings 910 and 920, the opening length, and the like.

  The arrangement positions of the openings 910 and 920 are not limited to the embodiment illustrated in FIGS. 2 and 3, and are at least two on the front F side, at least one on the back B side, or at least one on the front F side. It is only necessary to open at least two places on the back surface B side. The term “one place” in the claims or the present specification means that a part of the channel length is open, and the channel is opened over the entire length of the channel length. Does not mean that. The total number of openings is preferably 3-9.

  The width of the channel 90 is preferably 1 mm to 3 mm. If the width of the flow path 90 becomes narrower than 1 mm, the flow pressure loss may increase rapidly. If the width of the flow path 90 is too larger than 3 mm, the ion exchange membrane will enter and the effect of preventing liquid leakage will be poor, and the pressure loss may also increase due to the penetration of the ion exchange membrane.

  If the depth of the flow path 90 is too deep, the flow path section back plate is thinned, the strength of the flow path section is reduced, and deformation due to the drop of the ion exchange membrane is likely to occur. In order to prevent deformation due to this strength reduction, the depth of the flow path 90 is preferably 50 to 80% of the distributor thickness.

  Furthermore, the interval (pitch) between a plurality of adjacent flow paths 90 is preferably 1.5 to 4 times the flow path width on the feed liquid port 5 side. Moreover, it is preferable that the space | interval (pitch) of the several adjacent flow path 90 is 1.5 times-10 times the flow path width in the net attachment opening part 4 (ion exchange chamber) side. This is because the form spreading radially toward the ion exchange chamber has good liquid dispersibility in the ion exchange chamber.

  Further, the number of flow paths 90 of the distributor is preferably 3 to 20, but may be appropriately changed depending on the size of the chamber frame 1 and the size of the net body 2.

  As shown in FIG. 2, for example, the flow path 90 of the distributor 9 arranged on the side of the supply liquid port 5 is a vertical portion 91 in which an upper portion connected to the supply liquid port 5 is orthogonal to the width direction of the distributor 9. It is preferable to be formed. Moreover, it is preferable that the lower part connected to the net body part 2 (ion exchange chamber) of the net attachment opening 4 is formed in an inclined part 92 that is inclined radially toward the net attachment opening 4. Similarly, the flow path 90 of the distributor 9 disposed on the discharge liquid port 6 side is also preferably formed on the vertical portion 91 at the discharge liquid port side so as to be connected to the discharge liquid port 6. It is preferable that a portion connected to the opening 4 (ion exchange chamber) is formed in an inclined portion 92 that is inclined radially toward the net attachment opening 4 (ion exchange chamber).

  If the channel 90 has a shape extending perpendicularly to the width direction, the channel resistance tends to be low and the liquid tends to flow. However, the electrodialysis apparatus has a configuration in which a plurality of chamber frames sandwiched between a cation exchange membrane and an anion exchange membrane are stacked as described above, and a desalting chamber and a concentration chamber are alternately formed. Then, the processing liquid flows into the chamber frame disposed in the desalination chamber from the supply liquid port, and the processing liquid flows into the net body (ion exchange chamber) via the distributor flow path. In addition, an electrolytic solution flows into the chamber frame disposed in the concentrating chamber from the supply liquid port, and the electrolytic solution flows into the net body (ion exchange chamber) via the distributor flow path.

  Therefore, if the flow path resistance of the flow path is too small, the treatment liquid or the electrolyte cannot be flowed into each chamber frame arranged in the plurality of desalting chambers or the concentration chambers in a well-balanced manner. It will flow into the room frame.

  If the treatment liquid or the electrolyte is not flowed into the chamber frames of the plurality of desalting chambers or concentration chambers in a well-balanced manner, a single flow of current occurs, and in a chamber with a poor liquid flow, the ion supply cannot catch up with the flowing current, There may be a problem that energization stops due to problems such as voltage increase and scale generation. From the above points, the flow path of the distributor is required to have an appropriately large flow path resistance. Then, according to the predetermined flow rate supplied to the desalination chamber and the concentration chamber, the number of distributors arranged in the chamber frame, the number of channels, The size (width, depth, length) is determined to obtain the optimum channel resistance.

  By forming the inclined portion 92, the flow path resistance can be increased and the inflow balance can be improved. Further, it is possible to obtain a good flow path resistance by appropriately designing the opening lengths, positions, flow path widths, and inclination angles of the inclined portions 92 of the openings 910 and 920 described above. Further, since the inclined portions 92 of the plurality of flow paths 90 are formed so as to spread radially, the liquid (treatment liquid or electrolytic solution) flows out to a wide area of the net body 2 (ion exchange chamber). Can contribute to the improvement of liquid dispersion efficiency. The effect of the inclined portion 92 described above has been described with respect to the distributor 9 disposed on the supply liquid port 5 side. However, the distributor 9 on the discharge liquid port 6 side is connected to the net body of the net mounting opening 4 by the inclined portion 92. There is an effect that the liquid can efficiently flow from a wide range of the section 2 (ion exchange chamber).

  When the chamber frame 1 provided with the distributor 9 having the above-described configuration is mounted on the electrodialysis apparatus 10 and electrodialysis is started, as shown in FIG. ) Flows out into the net body 2 (ion exchange chamber) of the net mounting opening 4 while obtaining an appropriate flow path resistance in the flow path 90. That is, the flow path resistance is exhibited by the liquid meandering and flowing in by the openings 910 and 920 arranged alternately. Further, the liquid flowing in from the net body 2 (ion exchange chamber) of the net mounting opening 4 is also discharged to the discharge liquid port 6 while obtaining an appropriate flow path resistance in the flow path. Thereby, a liquid flows into each chamber frame 1 arrange | positioned in the several desalination chamber or the concentration chamber with sufficient balance, and electrodialysis with sufficient balance efficiency can be performed. In addition, since it can be formed thinner than a distributor having a conventional hollow channel, it can contribute to good electrodialysis while minimizing the occurrence of pressure loss due to deformation.

  Further, the flow path of the distributor is provided with openings alternately arranged in at least one place on one side and at least two places on the other side facing the one side. Adjacent ion exchange membranes (cation exchange membrane C and anion exchange membrane A) fall into the openings 910 and 920 to form gaps. Through this gap, the liquid flowing in from the supply liquid port 5 tries to leak into the adjacent chamber. However, since the openings are arranged alternately, it is possible to effectively prevent liquid leakage. .

  The distributor 9 of this embodiment is not limited to the above, and may have the configuration shown in FIGS. FIG. 8 is an enlarged plan view of the distributor shown in FIG. 9 is a longitudinal sectional view taken along the line VI-VI in FIG.

  As shown in FIGS. 8 and 9, the distributor 9 of the present embodiment has the linear rib 31 formed on the surface opposite to the side where the opening 910 is formed at the position where the opening 910 is disposed. It is preferable. Moreover, it is preferable that the linear rib 32 is formed on the surface opposite to the side where the opening 920 is formed at the position where the opening 920 is disposed.

  The linear ribs 31 and 32 have a width of 100 to 400 μm and a height of 20 to 150 μm, and the cross-sectional shape is preferably triangular or semi-elliptical. One or more linear ribs 31 and 32 are preferably formed at one location of each of the openings 910 and 920, more preferably two or more linear ribs 31 and 32 are formed, and three or more linear ribs 31 and 32 are more preferably formed. It is more preferable to form the linear ribs 31 and 32. The interval between the plurality of linear ribs 31 and 32 is preferably 2 to 10 mm. When a plurality of the linear ribs 31 and 32 are stacked with the chamber frame 1 sandwiching the ion exchange membrane, the adjacent ion exchange membrane is suppressed linearly in the distributor portion, so that the electrolyte is placed in the adjacent ion exchange chamber. Leakage can be prevented.

<Electrodialysis machine>
FIG. 5 shows an assembly diagram of a schematic side sectional structure of the filter press type electrodialysis apparatus 10 of the present invention. In this electrodialysis apparatus 10, a large number of chamber frames 1 each including the distributor 9 described above are arranged between a cathode plate 10a and an anode plate 10b. In the example of illustration, the chamber frame arrange | positioned in the desalination chamber was described as 1A, and the chamber frame arrange | positioned in the concentration chamber was described as 1B.

  Between the chamber frames 1A and 1B, the cation exchange membrane C and the anion exchange membrane A are alternately sandwiched. As such cation exchange membrane C and anion exchange membrane A, known ones can be used.

  The space (net body part 2) in the chamber frames 1A and 1B is the above-described ion exchange chamber (desalting chamber 11 or concentration chamber 12). An anion exchange membrane A is disposed between the extreme concentration chamber 12 (chamber frame 1B) and the cathode plate 10a, and between the desalting chamber 11 (chamber frame 1A) and the anode plate 10b at the other end. Is provided with a cation exchange membrane C.

  As described above, the plurality of ion exchange membranes A and C and the chamber frames 1A and 1B arranged between the cathode plate 10a and the anode plate 10b are firmly fixed by the pair of fastening plates 13 and 13.

  When electrodialysis is performed using the electrodialyzer 10 having the above-described configuration, the processing liquid is introduced from the supply liquid port 5 of the chamber frame 1A (see FIG. 4), and the processing liquid is supplied to the desalting chamber 11. . The processing liquid supplied to the desalting chamber 11 is discharged to the discharge liquid port 6, and the discharged processing liquid is supplied to the desalting chamber 11 again.

  The chamber frame 1 </ b> B is supplied with a dilute electrolytic solution from the supply liquid port 5, is supplied with the electrolytic solution to the concentration chamber 12, and the electrolytic solution supplied to the concentration chamber 12 is discharged to the discharge liquid port 6. , And is supplied to the next concentration chamber 12. Accordingly, the ions in the processing liquid in the desalting chamber 11 are circulated and supplied to the desalting chamber 11 and the concentration chamber 12 while applying a constant voltage between the cathode plate 10a and the anode plate 10b. Gradually moves into the concentration chamber 12. Then, the ion concentration of the electrolyte circulated in the concentration chamber 12 increases, and as a result, a target high-concentration salt solution can be obtained.

  As described above, the electrodialysis apparatus 10 of this embodiment is configured to use the distributor 9 having the flow path 90 provided with the openings 910 and 920. Then, the processing liquid that flows into the chamber frame 1A arranged in the desalting chamber 11 flows out into the ion exchange chamber (desalting chamber 11) while obtaining an appropriate channel resistance in the channel. In addition, the electrolyte flowing into the chamber frame 1B arranged in the concentration chamber 12 is also discharged to the ion exchange chamber (concentration chamber 12) while obtaining an appropriate channel resistance in the channel. Further, when the respective liquids are discharged from the ion exchange chamber to the discharge liquid port 6 in the desalting chamber 11 and the concentration chamber 12, they are also discharged while obtaining an appropriate flow path resistance.

  Accordingly, the treatment solution or the electrolyte solution flows in and out in a balanced manner uniformly into each chamber frame 1 disposed in the plurality of desalting chambers and the concentration chambers, and stable electrodialysis with a balanced efficiency can be stably performed. It can be carried out.

  Efficient liquid dispersion in the ion exchange chamber is an important factor because it is directly related to the accuracy of electrodialysis. Therefore, by using the distributor 9 of the present invention, it is possible to further improve the liquid dispersion rate and stably obtain highly accurate and efficient electrolysis.

  The embodiments of the present invention have been described in detail with reference to the drawings. In addition, said description is for understanding embodiment and does not limit the range of embodiment. Furthermore, the above embodiments are not mutually exclusive. Therefore, it is intended to combine the elements of different embodiments as long as no contradiction arises, and various modifications and changes are possible within the scope of the technical gist of the disclosure disclosed in the claims. .

DESCRIPTION OF SYMBOLS 1 Chamber frame 1A Desalination chamber frame 1B Concentration chamber frame 2 Net body part 3 Frame part 4 Net attachment opening part 5 Feed liquid port 6 Discharge liquid port 7, 8 Communication port 9 Distributor 10 Electrodialyzer 10a Cathode plate 10b Anode plate 11 Desalination chamber 12 Concentration chamber 13 Clamping plate 30 Ribs 31 and 32 Linear ribs 71 and 710 Feed liquid ports 72 and 720 Distributor 73 Channel 731 Upper channel 732 Connection channel 733 Lower channel 74 and 740 Net attachment opening 75 750 Net body portion 80 Ion exchange membrane 90 Channel 91 Vertical portion 92 Inclined portion 94 Through portion 910, 920 Opening portion C Cation exchange membrane A Anion exchange membrane S Gap J, K, L, M Welded portion

Claims (12)

An electrodialyzer comprising a concentration chamber and a desalting chamber by alternately arranging a plurality of cation exchange membranes and anion exchange membranes with a chamber frame interposed between a cathode plate and an anode plate,
The chamber frame includes a net main body portion disposed at a central position, and a frame portion positioned around the net main body portion,
The frame portion includes a supply liquid port, a discharge liquid port, and a distributor having a flow path,
The flow path is disposed between the supply liquid port and the net body part, and between the discharge liquid port and the net body part,
The electrodialysis apparatus, wherein the flow path is provided with an arrangement in which openings are alternately arranged at least at one place on one side and at least two places on the other side.   The electrodialysis apparatus according to claim 1, wherein each of the openings has a length of 10% to 33% with respect to a total length of the flow path. The flow path is
The electricity according to claim 1 or 2, wherein a part of the opening provided on one side and a part of the opening provided on the other side are arranged so as to overlap each other to form a through-hole. Dialysis machine.   The electrodialysis apparatus according to claim 3, wherein a length of the penetrating part in a flow path direction is 2 mm to 6 mm.   In the flow path, a portion connected to the supply liquid port or the discharge liquid port is formed in a vertical portion orthogonal to the width direction of the distributor, and a portion connected to the net main body portion is formed in the net main body portion. The electrodialysis apparatus according to any one of claims 1 to 4, wherein the electrodialysis apparatus is formed in an inclined portion that is inclined radially. A plurality of the flow paths are provided in the width direction,
The electrodialysis apparatus according to any one of claims 1 to 5, wherein an interval between the adjacent flow paths is 1.5 to 10 times a flow path width.   The electrodialysis apparatus according to any one of claims 1 to 6, wherein the flow path has a rectangular or elliptical cross-sectional shape.   The electrodialysis apparatus according to claim 3 or 4, wherein the number of through portions formed in the flow path is two to eight.   The electrodialysis apparatus according to claim 3, wherein the depth of the flow path is 50% to 80% of the distributor thickness.   The electrodialysis apparatus according to any one of claims 1 to 9, wherein the flow path has a width of 1 mm to 3 mm.   The electrodialysis apparatus according to any one of claims 1 to 10, wherein a rib is formed on one side of the frame part. The distributor
The electrodialysis apparatus according to any one of claims 1 to 11, wherein a linear rib is formed on a surface opposite to the side where the opening is provided at the position where the opening is disposed.

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