JP7839724B2 - Processing unit - Google Patents

Description

This invention relates to a processing apparatus for performing electrodialysis or reverse electrodialysis.

Conventional technologies for electrodialysis or reverse electrodialysis processing devices are publicly known. For example, as described in Patent Document 1.

Patent Document 1 discloses an electrodialysis apparatus in which cation exchange membranes and anion exchange membranes are alternately stacked with a chamber frame in between, arranged between electrodes, and both ends are clamped with a clamping frame to alternately form concentration chambers and desalination chambers inside.

In the concentration chamber and desalination chamber of the electrodialysis apparatus, the treatment fluid is supplied from the outside through an inlet that penetrates the chamber frame, and the treatment fluid is discharged to the outside through a discharge port that also penetrates the chamber frame. Furthermore, in the electrodialysis apparatus, a grid-like rib pattern is formed on one side of the chamber frame to suppress leakage of the treatment fluid.

However, in the configuration described above, the ribs are formed to cover almost the entire surface of one side of the chamber frame, and since they seal across the surface, there are limitations to reducing leakage of the processing fluid.

Patent No. 6709621

This invention was made in view of the above circumstances, and its objective is to provide a processing apparatus that can reduce leakage of the processing liquid.

The problems that this invention aims to solve are as described above, and the means for solving these problems will now be explained.

That is, in claim 1, an apparatus for performing electrodialysis or reverse electrodialysis is provided in which a plurality of cation exchange membranes and anion exchange membranes are arranged alternately between a cathode plate and an anode plate with a frame member interposed between them to form a plurality of spaces, and a processing liquid supplied from the outside is circulated through the plurality of spaces, wherein the frame member has a seal line provided on the surface of the frame member that defines the flow range of the processing liquid , and a through hole that penetrates the frame member in the thickness direction and guides the processing liquid to other adjacent frame members, the seal line includes a first seal line provided between the through hole and the space, the first seal line has a communication portion that connects the through hole and the space, the communication portion is composed of a slit-shaped portion that extends across the through hole and the space in the first seal line and is closed in the thickness direction by the surface of the frame member .

In claim 2, each of the communicating portions has a plurality of slit-shaped portions .

Claim 3, wherein the seal line includes a second seal line provided to surround the periphery of the space .

In claim 4, the through hole includes a first through hole and a second through hole, the frame member includes a first frame member and a second frame member that constitute a space and another space which are different spaces from each other, the communicating portion of the first frame member communicates between the first through hole and the space, and the communicating portion of the second frame member communicates between the second through hole and the other space .

In claim 5, the frame members adjacent to each other are formed such that their seal lines come into contact with each other via the cation exchange membrane or the anion exchange membrane .

The present invention provides the following effects:

In claim 1, leakage of the processing liquid can be reduced. Furthermore, internal leakage of the processing liquid can be reduced. In addition, the processing liquid can be supplied to the space using a seal line.

A side view showing an electrodialysis apparatus according to one embodiment of the present invention. (a) Front cross-sectional view taken along the line A-A in Figure 1 (partial front cross-sectional view showing the first gasket) (b) Rear cross-sectional view taken along the line B-B in Figure 1 (partial rear cross-sectional view showing the first gasket). (a) Front cross-sectional view taken along the line C-C in Figure 1 (partial front cross-sectional view showing the second gasket) (b) Rear cross-sectional view taken along the line D-D in Figure 1 (partial rear cross-sectional view showing the second gasket). An exploded perspective view showing how the replacement membrane is sandwiched between adjacent gaskets. A side cross-sectional view taken along the line E-E in Figure 2(a). A side cross-sectional view taken along the line F-F in Figure 2(b).

In the following explanation, the directions indicated by arrows U, D, F, B, L, and R in the diagram will be defined as upward, downward, forward, backward, left, and right, respectively.

First, an outline of an electrodialysis apparatus 1, which is one embodiment of the processing apparatus according to the present invention, will be described using Figures 1, 5, and 6, etc. Note that, for convenience, the sizes of each component are exaggerated in each drawing.

The electrodialysis apparatus 1 is a device for performing electrodialysis. The electrodialysis apparatus 1 comprises an anode plate 11, a cathode plate 12, an anion exchange membrane 13, a cation exchange membrane 14, a gasket 15, and a support plate 16.

The anode plate 11 and cathode plate 12 are each formed in a substantially flat shape. The anode plate 11 and cathode plate 12 are positioned spaced apart from each other, facing each other in the front-to-back direction. The anode plate 11 and cathode plate 12 are electrically connected via a power supply. In this way, a voltage can be applied between the anode plate 11 and cathode plate 12.

The anion exchange membrane 13 is an anion exchange membrane. The cation exchange membrane 14 is a cation exchange membrane. Multiple anion exchange membranes 13 and cation exchange membranes 14 are provided and arranged alternately between the anode plate 11 and the cathode plate 12. The anion exchange membrane 13 and cation exchange membrane 14 have appropriate pores to avoid obstructing the flow of the processing liquid, which will be described later.

The gasket 15 is formed in a flat plate shape. The gasket 15 has openings and other features described later. Multiple gaskets 15 are provided, each interposed between adjacent anion exchange membranes 13 and cation exchange membranes 14. Furthermore, for two gaskets 15 adjacent to each other in the front-to-back direction, the anion exchange membrane 13 is sandwiched between one gasket 15, and the cation exchange membrane 14 is sandwiched between the other gasket 15. A detailed explanation of the gasket 15's structure will be provided later.

The support plates 16 are provided in pairs, each formed in a substantially flat shape. The pair of support plates 16-16 are positioned outside the anode plate 11 and cathode plate 12. The pair of support plates 16-16 are fixed together by clamping the internal components (anode plate 11 and cathode plate 12, multiple anion exchange membranes 13 and cation exchange membranes 14, multiple gaskets 15, etc.) to each other. The pair of support plates 16-16 are provided with a supply port 161 for supplying the processing liquid from the outside and an outlet port 162 for discharging the processing liquid to the outside. The supply port 161 is located below the outlet port 162. In this way, by flowing the processing liquid from bottom to top against gravity, the inflow of gas can be suppressed.

In this embodiment, two types of supply ports 161 are provided (hereinafter sometimes referred to as the first supply port 163 and the second supply port 164). Similarly, two types of discharge ports 162 are provided (hereinafter sometimes referred to as the first discharge port 165 and the second discharge port 166).

Thus, in the electrodialysis apparatus 1, multiple spaces (desalination chambers 1R and concentration chambers 2R) are provided between the cathode plate 12 and the anode plate 11, separated by anion exchange membranes 13 and cation exchange membranes 14 via gaskets 15 (see Figures 5 and 6). The desalination chamber 1R allows the processing liquid (desalination processing liquid) to flow through it. The concentration chamber 2R allows the processing liquid (concentrated processing liquid) to flow through it. That is, by supplying the processing liquid to the desalination chamber 1R and concentration chamber 2R while applying a constant voltage between the cathode plate 12 and the anode plate 11, ions in the processing liquid in the desalination chamber 1R gradually migrate into the concentration chamber 2R. This increases the ion concentration of the electrolyte flowing through the concentration chamber 2R, allowing the desired high-concentration concentrated processing liquid to be obtained. A detailed explanation of the configuration of the desalination chamber 1R and concentration chamber 2R will be provided later.

The configuration of the gasket 15 will be described in detail below using Figures 2 to 6.

In this embodiment, two types of gaskets 15 are provided. Hereafter, one of the two types of gaskets 15 (the gasket shown in Figure 2) will be referred to as the "first gasket 150," and the other (the gasket shown in Figure 3) will be referred to as the "second gasket 250." The first gasket 150 and the second gasket 250 have different spatial configurations. In this embodiment, as shown in Figures 5 and 6 described later, the first gasket 150 constitutes the desalination chamber 1R. The second gasket 250 constitutes the concentration chamber 2R. First, the configuration of the first gasket 150 shown in Figure 2 will be described below.

As shown in Figure 2, the first gasket 150 comprises a frame portion 151, a mesh portion 152, a through hole 153, and a seal line 154.

The frame portion 151 is formed in a roughly rectangular shape with an opening 151a in the center. The frame portion 151 is made of a resin material such as a thermosetting resin or a thermoplastic resin. The frame portion 151 is formed by performing appropriate processing such as press working, cutting, or laser processing on a flat plate-shaped member. The opening 151a is formed in a roughly rectangular shape when viewed from the front.

The mesh portion 152 is formed to cover the opening 151a of the frame portion 151. The mesh portion 152 is formed in a mesh-like structure using, for example, multiple wires. The mesh portion 152 is fixed to the edge of the opening 151a, for example, by welding. In this way, the mesh portion 152 prevents the anion exchange film 13 and the cation exchange film 14, which are positioned to sandwich the first gasket 150, from coming into contact with each other (preventing the space between these films from collapsing). Note that, for convenience, the mesh portion 152 is omitted from the drawings as appropriate.

The through-hole 153 penetrates the frame portion 151 in the front-to-back direction. That is, the through-hole 153 connects the front and back sides of the frame portion 151. The through-hole 153 is configured to allow the processing liquid to flow through. The through-hole 153 is formed in a perfectly circular shape when viewed from the front. Multiple through-holes 153 are provided on both the upper and lower sides of the frame portion 151 (seven on each side in this embodiment).

The upper through-holes 153 are through-holes for circulating the processed liquid discharged from the desalination chamber 1R and the concentration chamber 2R. The upper through-holes 153 are located above the opening 151a of the frame portion 151. The upper through-holes 153 are arranged side-by-side at equal intervals in the left-right direction. The upper through-holes 153 communicate with the outlets 162 provided in the pair of support plates 16, 16 via upper through-holes 153 of other gaskets 15, etc. In this embodiment, a portion of the upper through-holes 153 communicates with the first outlet 165 of the outlets 162. The remaining portion of the upper through-holes 153 communicates with the second outlet 166 of the outlets 162.

In the following, the upper through-hole 153 connected to the first discharge port 165 may be referred to as the "first upper through-hole 155a," and the upper through-hole 153 connected to the second discharge port 166 may be referred to as the "second upper through-hole 155b." In this embodiment, of the seven upper through-holes 153 arranged in parallel on the left and right, the central through-hole and the second through-holes to the left and right of the central through-hole, a total of three through-holes 153, are configured as the first upper through-holes 155a. Furthermore, of the seven through-holes 153, the four through-holes 153 other than the first upper through-holes 155a are configured as the second upper through-holes 155b.

The lower through-holes 153 are for circulating the processing liquid supplied to the desalination chamber 1R and the concentration chamber 2R. The lower through-holes 153 are located below the opening 151a of the frame portion 151. The lower through-holes 153 are arranged side-by-side at equal intervals in the left-right direction. The lower through-holes 153 communicate with the supply ports 161 provided in the pair of support plates 16, 16 via other lower through-holes 153 of the gasket 15. In this embodiment, a portion of the lower through-holes 153 communicates with the first supply port 163 of the supply ports 161. The remaining portion of the lower through-holes 153 communicates with the second supply port 164 of the supply ports 161.

In the following, the lower through-hole 153 connected to the first supply port 163 will be referred to as the "first lower through-hole 156a," and the lower through-hole 153 connected to the second supply port 164 will be referred to as the "second lower through-hole 156b." The first lower through-hole 156a is located directly below the first upper through-hole 155a. The second lower through-hole 156b is located directly below the second upper through-hole 155b. That is, in this embodiment, of the seven lower through-holes 153 arranged in parallel left and right, the central through-hole and the second through-holes to the left and right of the central through-hole, a total of three through-holes 153, are configured as the first lower through-holes 156a. Furthermore, of the seven through-holes 153, the four through-holes 153 other than the first lower through-holes 156a, a total of four through-holes 153, are configured as the second lower through-holes 156b.

The seal line 154 is a line-shaped sealing portion designed to suppress leakage of the processing fluid. The seal line 154 is formed on both the front and back surfaces of the frame 151. Since the configuration of the seal lines 154 formed on the front and back surfaces of the frame 151 is substantially the same, the following description will primarily focus on the configuration of the seal line 154 formed on the front surface of the frame 151.

The seal line 154 is formed using screen printing, a dispenser, or the like. Therefore, the seal line 154 offers excellent design flexibility. Furthermore, the seal line 154 is constructed from a material that is somewhat flexible and easily elastically deformable, such as silicone rubber. The seal line 154 is formed to surround the area through which the processing liquid can flow. In other words, the seal line 154 is configured to define the area (flow range) through which the processing liquid can flow. The seal line 154 includes a first seal line 157 and a second seal line 158.

The first seal line 157 is formed to surround the opening 151a. Specifically, the first seal line 157 has left and right portions 157a on both the left and right sides of the opening 151a, and upper and lower portions 157b on both the upper and lower sides of the opening 151a.

The left and right portions 157a of the first seal line 157 are formed to extend linearly in the vertical direction on both the left and right sides of the opening 151a. The left and right portions 157a of the first seal line 157 are formed in the immediate vicinity of the opening 151a.

The upper and lower portions 157b of the second seal line 158 are formed to extend horizontally on both the upper and lower sides of the opening 151a. The upper and lower portions 157b are formed outside (upper and lower) of the upper and lower through-holes 153 and 153, respectively. The upper and lower portions 157b are formed in a wavy shape that follows the outer shape (semicircular arc) of the upper and lower through-holes 153 and 153. The left and right ends of the upper and lower portions 157b are connected to the left and right portions 157a.

The second seal line 158 is formed to extend horizontally on both the upper and lower sides of the opening 151a, and inside the upper and lower portions 157b of the first seal line 157. The second seal line 158 is formed in a wavy shape that follows the inner outer shape (semicircular arc) of the upper and lower through holes 153. The second seal line 158 is connected to the upper and lower portions 157b of the first seal line 157. Thus, the second seal line 158 and the upper and lower portions 157b of the first seal line 157 form an annular seal line around the upper and lower through holes 153. A communication portion 158a is formed in the second seal line 158.

The communication portion 158a connects the upper and lower through holes 153 and the opening 151a. That is, the communication portion 158a connects the upper and lower through holes 153 and the space (desalination chamber 1R). The communication portion 158a is formed in a slit shape extending approximately vertically. The communication portion 158a is formed in the portion of the second seal line 158 corresponding to the first upper through hole 155a and the first lower through hole 156a (the portion of the second seal line 158 between the first upper through hole 155a and the first lower through hole 156a and the opening 151a), but not in the portion corresponding to the second upper through hole 155b and the second lower through hole 156b.

Although a detailed explanation has been omitted, the seal line 154 is formed not only on the front but also on the back of the frame portion 151. The seal line 154 on the back is formed so as to overlap with the seal line 154 on the front, via the frame portion 151, when viewed from the front.

Next, the configuration of the second gasket 250 will be explained using Figure 3.

The second gasket 250 is formed in general the same manner as the first gasket 150. That is, the second gasket 250 has the same frame portion 251, mesh portion 252, through-holes 253, and seal line 254 as the first gasket 150.

More specifically, the opening 251a of the frame portion 251 of the second gasket 250 corresponds to the opening 151a of the frame portion 151 of the first gasket 150. Furthermore, the first upper through-hole 255a, the second upper through-hole 255b, the first lower through-hole 256a, and the second lower through-hole 256b of the second gasket 250 correspond to the first upper through-hole 155a, the second upper through-hole 155b, the first lower through-hole 156a, and the second lower through-hole 156b of the first gasket 150. Also, the first seal line 257 (left/right portions 257a and upper/lower portions 257b) and the second seal line 258 of the second gasket 250 correspond to the first seal line 157 (left/right portions 157a and upper/lower portions 157b) and the second seal line 158 of the first gasket 150.

Furthermore, the communication portion 258a of the second seal line 258 of the second gasket 250 corresponds to the communication portion 158a of the second seal line 158 of the first gasket 150. The communication portion 258a connects the upper through-hole 253 and the lower through-hole 253 with the opening 251a. That is, the communication portion 258a connects the upper through-hole 253 and the lower through-hole 253 with the space (concentration chamber 2R). The communication portion 258a of the second gasket 250 differs from the communication portion 158a of the first gasket 150 in that it is formed in the portion of the second seal line 258 corresponding to the second upper through-hole 255b and the second lower through-hole 256b, and is not formed in the portion corresponding to the first upper through-hole 255a and the first lower through-hole 256a.

Furthermore, each portion of the second gasket 250 (excluding the communication portion 258a) is formed to overlap with each portion of the first gasket 150 when viewed from the front of the electrodialysis apparatus 1.

As described above, in the electrodialysis apparatus 1 according to this embodiment, the desalination chamber 1R and the concentration chamber 2R are partitioned using two types of gaskets 15 (a first gasket 150 and a second gasket 250). As a result, the desalination chamber 1R and the concentration chamber 2R are supplied with the processed liquid from different supply ports 161 (a first supply port 163 and a second supply port 164), as will be described later. Furthermore, the processed liquid is discharged from the desalination chamber 1R and the concentration chamber 2R from different outlets 162 (a first outlet 165 and a second outlet 166), as will be described later.

The configurations of desalination chamber 1R and concentration chamber 2R will be described in detail below using Figures 5 and 6.

In Figures 5 and 6, the portion of the multiple spaces where the desalination chamber 1R, concentration chamber 2R, and desalination chamber 1R are arranged sequentially from front to rear is extracted. That is, in Figures 5 and 6, the spaces using the first gasket 150, the second gasket 250, and the first gasket 150 are shown sequentially from front to rear. Thus, the opening 151a of the first gasket 150 is partitioned as a space (desalination chamber 1R) where the front is covered by the anion exchange membrane 13 and the rear is covered by the cation exchange membrane 14. Similarly, the opening 251a of the second gasket 250 is partitioned as a space (concentration chamber 2R) where the front is covered by the cation exchange membrane 14 and the rear is covered by the anion exchange membrane 13.

Figure 5 shows a side cross-sectional view of the area where the desalination chamber 1R and concentration chamber 2R are located, including the first upper through-holes 155a, 255a, and 155a that communicate with the first discharge port 165, and the first lower through-holes 156a, 256a, and 156a that communicate with the first supply port 163. Figure 6 shows a side cross-sectional view of the area where the desalination chamber 1R and concentration chamber 2R are located, including the second upper through-holes 155b, 255b, and 155b that communicate with the second discharge port 166, and the second lower through-holes 156b, 256b, and 156b that communicate with the second supply port 164.

Thus, as shown in Figure 5, the desalination chamber 1R is connected to the first upper through-hole 155a and the first lower through-hole 156a via the communication portion 158a of the second seal line 158. That is, the desalination chamber 1R is configured such that the treated liquid is supplied from the first supply port 163, while the treated liquid is not supplied from the second supply port 164. Furthermore, the desalination chamber 1R is configured such that the treated liquid is discharged to the first outlet 165, while the treated liquid is not discharged to the second outlet 166.

Furthermore, as shown in Figure 6, the concentration chamber 2R is connected to the second upper through-hole 255b and the second lower through-hole 256b via the communication portion 258a of the second seal line 258. That is, the concentration chamber 2R is configured such that the treated liquid is supplied from the second supply port 164, while the treated liquid is not supplied from the first supply port 163. Also, the concentration chamber 2R is configured such that the treated liquid is discharged to the second outlet 166, while the treated liquid is not discharged to the first outlet 165.

Furthermore, when the desalination chamber 1R and the concentration chamber 2R are partitioned, as described above, an exchange membrane (anion exchange membrane 13 and cation exchange membrane 14) is sandwiched between two gaskets 15 that are adjacent to each other in the front-to-back direction. In this case, as shown in Figures 4 to 6, the two adjacent gaskets 15 (for example, in Figure 4, the first rear gasket 150 and the second front gasket 250) are brought into contact with each other via the anion exchange membrane 13, with their seal lines 154 (first seal line 157 and second seal line 158) and seal line 254 (first seal line 257 and second seal line 258) abutting against each other. That is, the seal line 154 of the first gasket 150 and the seal line 254 of the second gasket 250 are formed to coincide in a front view, except for the portions where the communication sections 158a and 258a are formed.

According to this design, the portion of the gasket 15 that directly contacts the replacement film (seal lines 154 and 254) is made linear, thereby effectively increasing the surface pressure at the seal lines 154 and 254. Furthermore, since the replacement film is sandwiched from both the front and rear sides by the seal lines 154 and 254, which are made of a material that is easily elastically deformable, the sealing performance of the seal lines 154 and 254 can be improved.

Thus, among the seal lines 154 and 254, the first seal lines 157 and 257 reduce leakage of the processing fluid to the outside of the electrodialysis machine 1 (external leakage). Furthermore, the second seal lines 158 and 258 reduce leakage of the processing fluid flowing through the through-holes 153 and 253 into unintended spaces (desalination chamber 1R and concentration chamber 2R) (internal leakage).

Although embodiments of the present invention have been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention as described in the claims.

For example, in this embodiment, two types of gaskets 15 are provided, but this is not limited to this; three or more types of gaskets 15 may be provided. Furthermore, the shape, material, and arrangement of each part constituting the gasket 15 (e.g., through holes 153 and 253, seal lines 154 and 254, etc.) can be arbitrarily set.

Furthermore, although this embodiment describes the processing apparatus according to the present invention as a device for performing electrodialysis, it can also be used as a device for performing reverse electrodialysis. In that case, processing solutions with different concentrations (for example, seawater and freshwater) are supplied to each space from the first supply port 163 and the second supply port 164, respectively. Thus, when performing reverse electrodialysis using the processing apparatus according to the present invention, the concentration difference energy can be directly converted into electricity by the ion exchange membrane.

Furthermore, as in this embodiment, when the processing apparatus according to the present invention is used as an electrodialysis apparatus, it is not necessarily required to provide two types of supply ports 161. That is, the processing liquid may be supplied to both spaces (desalination chamber 1R and concentration chamber 2R) from the same supply port. On the other hand, when the processing apparatus according to the present invention is used as an inverse electrodialysis apparatus, it is not necessarily required to provide two types of discharge ports 162. That is, the processing liquid may be discharged to both spaces from the same discharge port.

As described above, in the embodiments of the present invention,
An electrodialysis or reverse electrodialysis apparatus is provided, which arranges multiple cation exchange membranes 14 and anion exchange membranes 13 alternately between a cathode plate 12 and an anode plate 11 with a gasket 15 (frame member) in between to form multiple spaces, and circulates a processing liquid supplied from the outside through these multiple spaces,
The gasket 15 (frame member) has seal lines 154 and 254 that define the flow range of the processing liquid.

This configuration reduces leakage of the processing fluid in an electrodialysis or reverse electrodialysis apparatus.

Furthermore, in embodiments of the present invention,
The seal line includes first seal lines 157 and 257 that are provided to surround the perimeter of the space.

This configuration reduces, for example, leakage of the processing fluid from the electrodialysis machine 1 to the outside (external leakage).

Furthermore, in embodiments of the present invention,
The gasket 15 (frame member) has through holes 153 and 253 that guide the processing liquid to other adjacent gaskets 15 (frame members),
The seal line includes a second seal line 158, 258 provided between the through holes 153, 253 and the space.

This configuration reduces, for example, leakage (internal leakage) of the processing liquid flowing through the through-holes 153 and 253 into unintended spaces (desalination chamber 1R and concentration chamber 2R).

Furthermore, in embodiments of the present invention,
The second seal lines 158 and 258 have connecting portions 158a and 258a that connect the through holes 153 and 253 with the space.

With this configuration, the processed liquid can be supplied to the space (desalination chamber 1R and concentration chamber 2R) using the second seal lines 158 and 258.

Furthermore, in embodiments of the present invention,
The through hole includes a first through hole and a second through hole,
The gasket 15 (frame member) includes a first gasket 150 (frame member) and a second gasket 250 (frame member) that constitute a desalination chamber 1R (one space) and a concentration chamber 2R (the other space), which are different spaces from each other.
The communication portion 158a of the first gasket 150 (frame member) communicates the first upper through hole 155a and the first lower through hole 156a of the first through hole and the desalination chamber 1R (one space),
The communication portion 258a of the second gasket 250 (frame member) connects the second upper through hole 255b and the second lower through hole 256b of the first and second through holes to the concentration chamber 2R (other space).

This configuration allows the processed liquid to be supplied to different spaces (desalination chamber 1R and concentration chamber 2R) from different through-holes (and thus from different first and second supply ports 163 and 164).

Furthermore, in embodiments of the present invention,
The adjacent gaskets 15 (frame members) are formed such that their seal lines 154 and 254 come into contact with each other via the cation exchange film 14 or the anion exchange film 13.

This configuration effectively increases the surface pressure in the portion of the gasket 15 that directly contacts the replacement membrane (seal lines 154 and 254), thereby effectively reducing leakage of the processing fluid.

1 Electrodialysis machine 11 Anode plate 12 Cathode plate 13 Anion exchange membrane 14 Cation exchange membrane 15 Gasket 154 Seal line 254 Seal line

Claims (5)

An electrodialysis or reverse electrodialysis apparatus is provided, wherein multiple cation exchange membranes and anion exchange membranes are arranged alternately between a cathode plate and an anode plate with a frame member in between to form multiple spaces, and a processing liquid supplied from the outside is circulated through these multiple spaces,
The frame member has a seal line provided on the surface of the frame member that defines the flow range of the processing liquid , and a through hole that penetrates the frame member in the thickness direction and guides the processing liquid to other adjacent frame members.
The seal line includes a first seal line provided between the through hole and the space,
The first seal line has a communication portion that connects the through hole and the space,
The communication portion is formed by a slit-shaped portion that extends between the through hole and the space in the first seal line and whose thickness direction is closed by the surface of the frame member.
Processing device. Each of the aforementioned connecting portions has a plurality of slit-shaped portions.
The apparatus according to claim 1. The seal line includes a second seal line provided to surround the perimeter of the space.
The apparatus according to claim 1 . The through hole includes a first through hole and a second through hole,
The frame member includes a first frame member and a second frame member that constitute one space and another space, which are distinct spaces from each other.
The communicating portion of the first frame member communicates between the first through hole and the first space, among the first and second through holes.
The communicating portion of the second frame member communicates between the second through-hole and the other space, among the first and second through-holes.
The apparatus according to claim 1 . The adjacent frame members are formed such that their seal lines meet each other via the cation exchange membrane or the anion exchange membrane.
The apparatus according to claim 1 .