JP2002166282A - Electrochemical water treatment device and its manufacturing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-efficient electrochemical water treatment device making use of a granular ion-exchange resin which is low in cost and excellent in characteristics, wherein the widths of a desalting chamber and an enriching chamber can be constituted each with a thin and polylayered laminated body. SOLUTION: The characteristics of the device of this invention is: provided with a first spacer which becomes the desalting chamber and a second spacer which becomes the enriching chamber alternately laminated, a laminate frame whose both sides are pinched by a first and a second pole chamber cells, an anion-exchange membrane arranged on the side of the first pole chamber cell of the first spacer, a cation- exchange membrane arranged on the side of the second pole chamber cells of the second spacer, and the granular ion-exchange resin is provided in the desalting chamber of the spacer, a pair of first connection holes and a pair of first water-flowing paths are formed in the first spacer, a pair of second connecting holes and a pair of second water-flowing paths are formed in the second spacer, and the second connecting holes are communicated with the first water-flowing paths and then connected with the desalting chamber, the first connecting holes are communicated with the second water- flowing paths and then connected with the enriching chamber, and a water flow stopping valve member is inserted in the second connecting holes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrochemical device for removing cations such as sodium ions and calcium ions and anions such as chloride ions and sulfate ions mainly contained in service water such as tap water. The present invention relates to a water treatment device and a method for manufacturing the same.

[0002]

2. Description of the Related Art For desalination of seawater and production of salt from seawater, an electrodialysis method comprising an ion exchange membrane and an electric field applying means is used. In addition, an electrodialysis method that does not require a regeneration operation is widely used for the production of ion-exchanged water and ultrapure water used in semiconductor production and the like.

[0003] In particular, the one in which an ion exchanger is accommodated in a desalting chamber sandwiched between a cation exchange membrane and an anion exchange membrane is called "electrodeionization" and is distinguished from "electrodialysis". The basic technology has been conventionally proposed by Kollsman of the United States (US Pat. No. 2,689,826, US Pat. No. 2,815,320).

Regarding "electrodeionization", Kollsm
According to the conventional technique proposed by An, a cation exchange membrane and an anion exchange membrane are alternately arranged, and an ion exchanger is accommodated in a desalination chamber of an electrodialysis tank formed with a desalination chamber and a concentration chamber.
The deionized water is produced by applying a voltage while flowing the water to be treated into the desalting chamber and performing electrodialysis. The ion exchanger and the ion exchange are performed using an acid and an alkali by water dissociation in the desalting chamber. The membrane is self-regenerating. In these devices, materials,
Many contrivances have been made in the configuration.

As a conventional technique of "electrodialysis", there is an electrodialysis apparatus proposed in Japanese Patent Application Laid-Open No. 3-224688 shown in FIG. This will be described below. FIG. 6 is a schematic sectional view of a conventional electrodialysis apparatus, and FIG. 7 is a view showing a water collecting apparatus in a desalination cell of a conventional electric deionized water producing apparatus.

In FIG. 6, an anode plate 101 and a cathode plate 1
02 are provided, and the anode chamber 103 and the cathode chamber 1 are respectively provided.
04. Between the anode chamber 103 and the cathode chamber 104, an anion exchange membrane 105, a desalination chamber 107, a cation exchange membrane 106, and a concentration chamber 108 are alternately stacked to form a dialysis tank. In the desalting chamber 107, a mixture of a regeneration type weakly acidic cation exchanger and a regeneration type weakly basic anion exchanger is stored. The anode chamber 103 and the cathode chamber 104 are filled with an electrolyte solution for imparting conductivity. This can be achieved by circulating a part of the concentrated water. The desalting chamber 107 of the electrodialysis apparatus thus configured
The water to be treated is passed through the concentrating chamber 108 and a DC voltage is applied to the anode plate 101 and the cathode plate 102, thereby causing
7, a predetermined deionized water can be obtained. Further, the concentrated water in which the ion content is concentrated is discharged from the concentration chamber 108.

[0007] By the way, an important part when deionization is performed is an ion exchanger housed in a desalting chamber. However, granular ion exchange resin beads, ion exchange fibers, or Japanese Patent Application Laid-Open No. 8-155272 are disclosed. The disclosed 0.
A sheet-like ion exchanger of 1 mm to 1.1 mm is generally used.

However, these ion exchangers have the following characteristics. The granular ion exchanger has the lowest material cost and is excellent, but the particles flow and are difficult to handle, and it is extremely difficult to store them in the desalting chamber. On the other hand, ion-exchange fibers and ion-exchange sheets have the advantage of being easy to handle, but they are very expensive, and it is difficult to fill the desalination chamber without gaps, and there is a tendency for electric conduction to be biased. ing. For these reasons, an approach has been sought to use granular ion exchangers (hereinafter, ion exchange resin beads) more easily than ion exchange fibers or ion exchange sheets as ion exchangers. I have.

For example, according to Japanese Patent Application Laid-Open No. H10-15360, as shown in FIG. 7, two comb-like members 121A and 121B are combined at the entrance and exit of the desalting chamber, and water passes but ion-exchange resin beads pass. The grid is designed so that it does not. The member body 122A of the first comb-like member 121A and the member body 12 of the second comb-like member 121B
2B is provided with a projection 124 and a recess 125, respectively, to form a water passage hole 123, and the fitting protrusion 126 and the fitting recess 1
27. According to this method, the outflow of the ion exchange resin beads can be prevented, and the outflow can be certainly prevented. However, at present, in order to realize more efficient deionization, it is required to further reduce the width of the desalting chamber and the concentrating chamber to form a multilayer stack. For this purpose, the desalting chamber is made as thin as possible. That is an important and essential issue. This is disclosed in Japanese Unexamined Patent Application Publication No. 10-1536.
With the technique proposed in No. 0, the molding thickness of the comb-like member cannot be reduced. If this comb-shaped member is installed at the entrances and exits of all the desalting chambers, not only the cost but also the manufacturing method becomes very complicated.

[0010]

As described above,
The ion exchanger used for deionization can be expected to have high characteristics if it is an ion exchange resin bead, but flows and is very difficult to handle. In addition, ion-exchange fibers and ion-exchange sheets have the advantage that they are easy to handle, but they are very expensive, and it is difficult to fill the desalination chamber without gaps, and there is a possibility that the electric conduction may be biased. there were.
There is a great expectation on how to develop a new ion exchanger which is easy to handle or how to easily handle ion exchange resin beads which are difficult to handle.

By the way, in order to carry out deionization more efficiently, it is extremely important to further reduce the width of the desalting chamber and the concentrating chamber to form a multilayer stack. However, such a structure cannot be achieved. If the desalting chamber has a complicated structure in order to prevent the ion-exchange resin beads from flowing out, it is necessary to assemble the desalting chamber with a complicated structure, which is extremely difficult to assemble and greatly impairs productivity.

Therefore, it is possible to form a multi-layered laminate with a simple structure, which is excellent in handling ion-exchange resin beads, does not flow out to the outside, and at the same time, makes the width of the desalting chamber and the concentrating chamber extremely thin. An electrochemical water treatment system that could be used was thought to be inconsistent and difficult to implement.

Therefore, in order to solve such a conventional problem, the present invention can provide a multi-layered laminate having a simple structure and extremely thin widths of the desalting chamber and the concentrating chamber, and is inexpensive and has high characteristics. An object of the present invention is to provide a highly efficient electrochemical water treatment apparatus using a granular ion exchange resin.

Further, the present invention can provide a multi-layered laminate having a very simple structure and a very narrow width between the desalting chamber and the concentrating chamber, making it possible to use a granular ion-exchange resin. An object of the present invention is to provide a method for easily manufacturing an electrochemical water treatment apparatus.

[0015]

In order to solve these problems, an electrochemical water treatment apparatus according to the present invention comprises a first spacer having an opening serving as a desalting chamber and an opening serving as a concentrating chamber. Stacked second spacers are alternately stacked, and a stacked frame sandwiched between the first electrode chamber cell and the second electrode chamber cell from both sides, a first electrode, a second electrode, and an alternating frame forming the stacked frame An anion exchange membrane disposed between the first spacer and the second spacer stacked on the first electrode chamber cell side of the first spacer; and a second spacer formed of the second spacer between the first spacer and the second spacer. A cation exchange membrane provided on the bipolar cell side; and a granular ion exchange resin filled in the desalting chamber of the first spacer. The first spacer has a pair of first connection holes and a pair of first connection holes. A water passage is formed, and a pair of second
When the connection hole and the pair of second water passages are formed to form the laminated body frame, the second connection hole and the first water passage communicate with each other, so that each of the desalination chambers has a desalination chamber discharge pipe and a desalination chamber entrance. While being connected to the water pipe, the first connection hole and the second water passage communicate with each other, and each of the concentration chambers is connected to the water discharge pipe of the concentration chamber and the water inlet pipe of the concentration chamber, and a water tap member is inserted into the second connection hole. It is characterized by having been done.

[0016] Thus, it is possible to form a multi-layered laminate having a simple configuration and extremely narrow widths of the desalting chamber and the concentrating chamber. It can be a target water treatment device.

Further, according to the method of manufacturing an electrochemical water treatment apparatus of the present invention, a first electrode serving as an anode is provided in a first electrode chamber cell, and the first electrode is connected to the first electrode chamber cell via an anion exchange membrane. One spacer is laminated, and the second is placed via a cation exchange resin membrane.
The spacers are stacked, and thereafter, the stacking is repeated in the order of the anion exchange membrane, the first spacer, the cation exchange membrane, and the second spacer, and the second electrode chamber cell is stacked via the anion exchange membrane. A second electrode serving as a cathode is provided in the chamber cell. At this time, the desalting chamber is connected to the desalting chamber water discharge pipe and the desalting chamber water inlet pipe by connecting the second connection hole and the first water passage, The first connecting hole communicates with the second water passage to connect the concentration chamber to the water discharge pipe of the concentration chamber and the water inlet pipe of the concentration chamber, and then to charge each of the deionization chambers in the first spacer with the particulate ion exchange resin. A method of manufacturing a chemical water treatment apparatus, wherein during assembly, a water faucet member is inserted into a second connection hole located below, and then a particulate ion exchange resin is filled in a desalting chamber in a first spacer. Thereafter, the faucet member is inserted into the remaining second connection hole.

This makes it possible to form a multi-layered laminate having a very simple structure with the widths of the desalting chamber and the concentrating chamber being extremely thin, and to use a granular ion exchange resin for electrochemical water treatment. The device can be easily assembled.

[0019]

According to the first aspect of the present invention, a first spacer having an opening serving as a desalting chamber and a second spacer having an opening serving as a concentration chamber are alternately laminated,
A laminate frame sandwiched between the first pole chamber cell and the second pole chamber cell from both sides, a first electrode provided in the first pole chamber cell as an anode, and a cathode provided in the second pole chamber cell Between the second electrode and the first and second spacers, which are alternately laminated to form a laminate frame, are disposed on the first electrode chamber cell side of the first spacer, and the first electrode chamber An anion exchange membrane also disposed between a cell and a first spacer adjacent thereto; and a first alternately laminated first frame constituting a laminate frame.
Between the spacer and the second spacer, the second spacer of the second spacer
A cation exchange membrane disposed on the side of the pole chamber cell and also disposed between the second pole chamber cell and the second spacer adjacent thereto, and particulate ions filled in the desalting chamber of the first spacer An electrochemical water treatment apparatus provided with an exchange resin, wherein the first spacer is formed with a pair of first connection holes and a pair of first water passages extending from an opening serving as a desalination chamber. The two spacers are formed with a pair of second connection holes and a pair of second water passages extending from an opening serving as a concentration chamber. When the laminated body frame is formed, the second connection holes and the first water passages communicate with each other. Then, each of the desalting chambers is connected to the desalting chamber water discharge pipe and the desalination chamber water inlet pipe, and the first connection hole and the second water passage communicate with each other, so that each of the concentration chambers becomes the concentration chamber discharge pipe and the concentration chamber. An electrochemical water treatment device connected to the water inlet pipe, wherein a water tap member is inserted into the second connection hole. Since the apparatus is an apparatus, it has a simple structure having an opening serving as a desalting chamber in the first spacer and an opening serving as a concentrating chamber in the second spacer, and the water passage can be constituted by the first spacer and the second spacer. The width of the desalting chamber and the concentrating chamber can be made very thin and multi-layered. Since the width of the chamber and the concentrating chamber can be made extremely thin, a highly efficient electrochemical water treatment apparatus can be obtained.

The invention according to claim 2 is the electrochemical water treatment apparatus according to claim 1, wherein the water faucet member is a porous rod or a porous tube through which water can pass. In addition, water can be passed through a porous rod or a porous tube, and the outflow of the granular cation exchange resin and the granular anion exchange tree from the communication hole can be prevented.

According to a third aspect of the present invention, the first spacer and the second spacer have the same shape, and the first pole chamber cell and the second pole chamber cell have the same shape. Since the electrochemical water treatment apparatus according to claim 1 or 2, the first spacer and the second spacer have the same shape, and the first pole chamber cell and the second pole chamber cell have the same shape. Becomes very simple.

According to a fourth aspect of the present invention, an opening serving as a desalting chamber is formed in the first spacer, and a pair of the first extending from the opening.
A water passage, a pair of first connection holes are provided, and an opening serving as a concentration chamber in the second spacer, a pair of second water passages extending from the opening, and a pair of second connection holes are provided. A first electrode serving as an anode is provided in the pole chamber cell, a first spacer is laminated on the first pole chamber cell via an anion exchange membrane, and a second spacer is laminated via a cation exchange resin membrane. After that, the lamination is repeated in the order of the anion exchange membrane, the first spacer, the cation exchange membrane, and the second spacer, and the second pole chamber cell is laminated via the anion exchange membrane. Is provided with a second electrode serving as a cathode. At this time, the desalting chamber is connected to the desalting chamber water discharge pipe and the desalting chamber water inlet pipe by connecting the second connection hole and the first water passage, and the first connection hole is provided. And the second water passage, and connects the concentration chamber to the water discharge pipe of the concentration chamber and the water inlet pipe of the concentration chamber,
Next, there is provided a method for manufacturing an electrochemical water treatment apparatus in which a particulate ion exchange resin is filled in each of the desalting chambers in a first spacer, wherein a water faucet member is inserted into a second connection hole located below during assembly. Then, the desalting chamber in the first spacer is filled with the particulate ion exchange resin, and thereafter, a water faucet member is inserted into the remaining second connection hole, thereby manufacturing the electrochemical water treatment apparatus. Since the method is a simple configuration having an opening serving as a desalting chamber in the first spacer and an opening serving as a concentrating chamber in the second spacer, the water passage can be constituted by the first spacer and the second spacer. The width of the desalting chamber and the concentrating chamber can be made extremely thin and multi-layered, and the inexpensive granular ion exchange resin is held in the desalting chamber by the faucet member. And in the desalination chamber there are no granular ions Can filled with exchange resin, can be manufactured electrochemical water treatment device of the width of the concentrating chambers and desalination chambers is very thin for high efficiency.

(Embodiment 1) Hereinafter, an electrochemical water treatment apparatus and a method for manufacturing the same according to Embodiment 1 of the present invention will be described with reference to the drawings. The electrochemical water treatment apparatus according to the first embodiment deionizes cations such as sodium ions and calcium ions and anions such as chloride ions and sulfate ions mainly contained in service water such as tap water. Is what you do. FIG. 1 is a diagram showing an outline of an electrochemical water treatment apparatus according to Embodiment 1 of the present invention, FIG. 2 is a schematic diagram of a desalination chamber of the electrochemical water treatment apparatus according to Embodiment 1 of the present invention,
FIG. 3 is a schematic diagram of a concentration chamber of the electrochemical water treatment device according to the first embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of the vicinity of a water passage of the electrochemical water treatment device according to the first embodiment of the present invention. FIG. 5 is an assembly diagram of the electrochemical water treatment apparatus according to Embodiment 1 of the present invention.

In FIG. 1, 1 is an electrolytic cell, 2 is an electrode chamber cell, 3 is an electrode, 4 is a desalination chamber, 5 is a concentration chamber, 6 is a water inlet pipe of a desalination chamber, 7 is a water discharge pipe of a desalination chamber, 8 Is a water inlet pipe of the concentration chamber, 9 is a water discharge pipe of the concentration chamber, 10 is a water inlet pipe of the pole chamber cell, 11 is a water pipe of the pole chamber cell, 12 is a water pipe of the pole chamber cell, and 13 is a water pipe of the pole chamber cell.

The electrode chamber cell 2 of the first embodiment includes an anode-side electrode chamber cell (first electrode cell) provided with an electrode 3 (first electrode) serving as an anode and an electrode 3 (first electrode cell) serving as a cathode. Although the cathode chamber cell (second electrode chamber cell) on the cathode side on which the second electrode is disposed has the same shape, it may have a different shape. In the first embodiment, the two pole chamber cells 2 are used facing each other.
The electrode 3 of the first embodiment is connected to a power supply (not shown), and the polarity is as described above. However, the polarity is not fixed to the anode and the cathode as in the case of backwashing.

2 to 4, reference numeral 14 denotes a spacer;
Is a cation exchange membrane, 16 is an anion exchange membrane, 17 is cation exchange resin beads (granular cation exchange resin), 18 is anion exchange resin beads (granular anion exchange resin), 1
9 is a porous body, 20 is a connection hole, and 21 is a porous tube (water faucet member). In the first embodiment, a mixture of the cation exchange resin beads 17 and the anion exchange resin beads 18 is used as the granular ion exchange resin.

The electrolytic cell 1 comprises a cation exchange membrane 16 and a spacer 14 (first
Spacer), anion exchange membrane 16, spacer 14 (second
Spacers) are stacked in multiple layers to form a laminate frame, and the desalting chamber inlet pipe 6, the desalting chamber outlet pipe 7, the concentrating chamber inlet pipe 8, the concentrating chamber outlet pipe 9, the pole chamber cell Inlet pipe 10,
The pole room cell water discharge pipe 11, the pole room cell water supply pipe 12, and the pole room cell water discharge pipe 13 are connected to each other, and are fastened and fixed from the outside. As shown in FIGS. 2 and 5, the desalting chamber 4 has a central opening of the spacer 14 sandwiched between the anion exchange membrane 16 and the cation exchange membrane 15 from both sides, and removes ions contained in the water to be treated. It is a cell. FIG.
As shown in FIG. 5, the concentration chamber 5 has a central opening of the spacer 14 sandwiched between the cation exchange membrane 15 and the anion exchange membrane 16 from both sides, and a cell for concentrating cations and anions of the water to be treated. Become. The desalting chambers 4 and the concentrating chambers 5 are arranged alternately. As in the first embodiment, the spacer 14 (first spacer) forming the desalting chamber 4 and the spacer 14 (second spacer) forming the enrichment chamber 5 have the same shape.
One of them may be used inverted, or another shape may be used. However, the spacer 14 of the first embodiment having the same shape has a very simple configuration, requires only one mold, and is easy to manufacture. In the first embodiment, Asahi Kasei K501 is used as the cation exchange membrane 16, and Asahi Kasei A501 is used as the anion exchange membrane 16. Also, it is appropriate to use a resin such as ABS or PP as a material of the spacer 14.

By the way, in the spacer 14 (first spacer) in which the central opening serving as the desalting chamber 4 is formed, a first water passage of a pair of narrow grooves extending upward and downward at diagonal positions is formed. Have been. In addition to the first water passage, a pair of connection holes 20 (first connection holes) are formed in the spacer 14 (first spacer) at opposite diagonal positions. Similarly, the spacer 14 (second spacer) in which the central opening serving as the enrichment chamber 5 is formed has a pair of thin grooves extending upward and downward at diagonal positions opposite to the spacer 14 (first spacer). A second water passage is formed. Spacer 1
A pair of connection holes 20 (second connection holes) are formed in the 4 (second spacer) at diagonal positions of the second water passage. The front end position of the first water passage and the position of the connection hole 20 (second connection hole), and the front end position of the second water passage and the position of the connection hole 20
The position of the (first connection hole) is in a positional relationship in which the two spacers 14 are stacked in a stacked state, and the outer shape of the tip of the second water passage is different from the shape of the connection hole 20 (first connection hole). The outer shape of the tip of the first water passage is a shape that matches the shape of the connection hole 20 (second connection hole). When the laminated body frame is formed by lamination, the first water passage and the connection hole 20 (second connection hole) communicate with each other, and
Are connected to the desalination chamber water inlet pipe 6 and the desalination chamber water discharge pipe 7, respectively, and the second water passage and the connection hole 20 (first connection hole).
And each of the enrichment chambers 5 is connected to the enrichment chamber water inlet pipe 8 and the enrichment chamber water discharge pipe 9.

Next, the desalination chamber inlet pipe 6 and the desalination chamber water discharge pipe 7 connected to the laminate frame will be described. The connection hole 20 (second connection hole) on the inlet side is shown in FIG. And a water inlet pipe 6 for the desalination chamber is provided at the starting point. The terminal side is closed by the wall surface of the pole room cell 2. The connection hole 20 (second connection hole) on the outlet side also penetrates in a direction orthogonal to the paper surface, the desalting chamber water discharge pipe 7 is installed at the starting point, and the terminal side is the pole chamber cell 2 (second pole). Room cell). Similarly, the concentrating chamber inlet pipe 8 and the concentrating chamber outlet pipe 9 will be described. As shown in FIGS. 1, 3, and 5, the direction is opposite to that of the desalting chamber 4, but the connection hole 20 ( The first connection hole) penetrates in a direction perpendicular to the plane of the paper, and the concentrating chamber inlet pipe 8 is installed at the starting point.
The terminal side is closed by the wall surface of the pole room cell 2. The connection hole 20 (first connection hole) on the outlet side also penetrates in a direction orthogonal to the paper surface, the concentrated water discharge pipe 9 is installed at the starting point, and the terminal side is the pole chamber cell 2 (first pole chamber). Cell).

As described above, the desalting chambers 4 and the concentration chambers 5 are arranged alternately, and the desalination chambers 4 and the concentration chambers 5 are
The inlet side and the outlet side are connected so that water can flow at the same time. The water passage of the concentration chamber 5 and the water passage of the desalination room 4 are completely independent in terms of water passage. The electrode chamber cell 2 is provided with an electrode 3 independently of the desalting chamber 4 and the concentration chamber 5, and has a structure through which water to be treated passes. Inside the pole room cell 2, a pole room cell inlet pipe 10, a pole chamber cell water discharge pipe 11,
It is connected to the polar chamber cell water inlet pipe 12 and the polar chamber cell water discharge pipe 13. The electrode 3 is connected to a power source (not shown).

Incidentally, in the concentrating chamber 5, a porous body 19 made of a polymer or a ceramic having a low water flow resistance is usually arranged. The desalting chamber 4 is filled with a granular ion exchange resin obtained by mixing cation exchange resin beads 17 and anion exchange resin beads 18. In order to improve the dialysis efficiency in the desalting chamber 4, in the first embodiment, as the cation exchange resin beads 17, Mitsubishi Chemical DIAION SK 1B particle size: 0.4 to 0.6 mm, anion exchange resin beads 18
As Mitsubishi Chemical DIAION SA 2A particle size;
It is filled with a mixture of two types of ion exchange resin beads of 0.4 to 0.6 mm. Thereby, the cation-exchange resin beads 17 and the anion-exchange resin beads 18 can be filled in the desalinated substance 4 without gaps, and an inexpensive and highly efficient electrochemical water treatment apparatus can be realized. Since the cation exchange resin beads 17 and the anion exchange resin beads 18 are very fine particles having a particle diameter of 1 mm or less, if they are left as they are, the first water passage and the connection hole 20 ( There is a high possibility of flowing out through the second connection hole). When the laminate frame of the electrochemical water treatment apparatus is configured, the cation exchange resin beads 17 and the anion exchange resin beads 18 flow out at the time of assembly.

Therefore, in the first embodiment, the spacer 1
The porous tube 21 (water tap member) is inserted into the connection hole 20 (second connection hole) of 4 (second spacer). The external shapes of the connection hole 20 and the porous tube 21 match and are mounted in a liquid-tight state. The porous tube 21 is suitably made of a polymer or ceramic having a small water flow resistance, for example, a polyethylene porous body (trade name: Fildas) made of Mitsubishi resin. Also,
Instead of the porous tube 21, a porous rod may be used. Since the inside of the connection hole 20 (the second connection hole) is closed by the porous tube 21, the cation exchange resin beads 17 and the anion exchange resin beads 18 are trapped by this and do not flow out. The water faucet member made of the porous tube 21 or the porous rod may be a long one penetrating the laminated body frame, but has a length equal to or less than the width of the spacer 14 (second spacer), and The second connection holes) may be closed. Although it is easier to assemble a long water faucet member that penetrates the laminated body frame, the water flow resistance increases. Therefore, in this case, it is preferable to use the porous tube 21 rather than the porous rod. Inserting the porous tube 21 shorter than the width of the spacer 14 (second spacer) at the position of each of the plurality of connection holes 20 (second connection holes) is effective in terms of water flow resistance. Assembly is very cumbersome.

As described above, the electrochemical water treatment apparatus according to the first embodiment is formed by laminating the spacer 14, the cation exchange membrane 15, and the anion exchange membrane 16 in multiple layers to form a laminated frame. A water channel is formed by the spacer 14;
The configuration of the spacer 14 is also very simple, the width of the desalting chamber 4 can be made extremely small, and the laminated frame becomes compact as a whole. In addition, the desalination efficiency increases accordingly.

Next, the processing performed by the electrochemical water treatment apparatus according to the first embodiment will be described. First, the water to be treated is injected from the desalting chamber inlet pipe 6 and supplied to each desalting chamber 4 through the porous pipe 21 inserted into the connection hole 20 (second connection hole). The treated water from which the ions have been removed in step (a) passes through the porous tube 21 inserted into the other connection hole 20 (second connection hole), and turns into deionized water (soft water) to form the deionization chamber discharge pipe 7. Water is spouted through.

On the other hand, the water to be treated injected from the condensing chamber inlet pipe 8 is supplied to each concentrating chamber 5 through the connecting hole 20 (first connecting hole), and the treated water supplied with ions in the concentrating chamber 5 Is
The water passes through the other connection hole 20 (first connection hole), becomes concentrated water, and is discharged through the water discharge pipe 9 in the concentration chamber.

Further, the to-be-processed water injected from the anode cell water inlet pipe 10 and the cathode cell water inlet pipe 11 into the electrode chamber cell 2 is electrolyzed in each of the electrode chamber cells 2, and becomes alkaline water and acidic water to form the anode water. Water is discharged from the cell water discharge pipe 12 and the cathode cell water discharge pipe 13.

Here, a desalting chamber 4, a concentration chamber 5, an anode cell,
The water to be treated injected into the cathode cell is the same, and is distributed to and passed through each chamber. When the deionized water (soft water) is mainly used, the distribution ratio is preferably about 0.1 in the demineralization chamber, 0.1 in the concentration chamber, 0.1 in the anode cell, and about 0.1 in the cathode cell. is there.

Next, a method of manufacturing the electrochemical water treatment apparatus according to the first embodiment will be described with reference to FIG. An electrode 3 (first electrode) serving as an anode is placed in an electrode chamber cell 2 (first electrode chamber cell).
And a spacer 14 (first spacer) is laminated on the first electrode chamber cell via the anion exchange film 16 and further a spacer 14 (second spacer) is laminated via the cation exchange resin film 15. , Then anion exchange membrane 16, spacer 1
4 (first spacer), cation exchange membrane 15, spacer 1
4 (second spacer) is repeated in this order, and the electrode chamber cell 2 (second electrode chamber cell) is stacked via the anion exchange membrane 16, and the electrode 3 (the cathode) is provided in the second electrode chamber cell. 2nd electrode)
Are provided, and one laminated body frame is formed and screwed from the outside.

At this time, the connection hole 20 (second connection hole) communicates with the first water passage of the spacer 14 (first spacer), and each desalting chamber 4 is connected to the desalting chamber inlet pipe 6 and the desalting chamber spouting pipe. 7 is connected. The connection hole 20 (first connection hole) and the spacer 1
4 (the first spacer) communicates with the second water passage, and each of the concentration chambers 5 is similarly connected to the concentration chamber inlet pipe 8 and the concentration chamber discharge pipe 9.

In this state, in order to inject the mixture of the cation exchange resin beads 17 and the anion exchange resin beads 18 into the desalting chamber 4 without gaps, first connect the porous tube 21 to one (lower) connection hole 20. insert. Subsequently, the cation-exchange resin beads 17 are passed through the other (upper side) water communication port.
A certain amount of the mixture of the and the anion exchange resin beads 18 is dispersed and poured into water or saline. Water or saline passes through the porous tube 21 and flows out of the connection hole 20, but the ion exchange resin is trapped in the porous tube 21 and
Stay in the space inside the central opening. After all the spacers 14 have been filled with the cation exchange resin beads 17 and the anion exchange resin beads 18, the porous tube 21 is also inserted into the connection hole 20 to which the cation exchange resin beads 17 and the anion exchange resin beads 17 have been added. The exchange resin beads 18 are prevented from flowing out. Finally, the desalting chamber inlet pipe 6 and the desalting chamber spout 7 are inserted.

As described above, the electrochemical water treatment apparatus according to the first embodiment has a simple configuration in which the space serving as the desalting chamber 4 and the space serving as the concentration chamber 5 are provided in the spacer 14.
It is possible to form a multilayer laminate in which the width of the desalting chamber 4 and the concentrating chamber 5 is extremely small, and the inexpensive cation exchange resin beads 17 and anion exchange resin beads 18 are formed by the porous tube 21 in the desalination chamber 4.
Since the width of the desalting chamber 4 and the concentrating chamber 5 is extremely small, a highly efficient electrochemical water treatment apparatus can be provided.

In the method of manufacturing the electrochemical water treatment apparatus according to the first embodiment, the cation exchange resin beads 17 and the anion exchange resin beads 18 can be held in the desalting chamber 4 by the porous tube 21. Therefore, storage in the desalting chamber 4 during assembly can be made extremely easy.

[0043]

The electrochemical water treatment apparatus of the present invention can have a simple structure, and can form a multi-layered laminated frame in which the width of the desalting chamber and the concentrating chamber is extremely thin, and the water passage leading to the desalting chamber. By disposing a porous tube or a porous rod in the desalination chamber, it is possible to easily fill the deionization chamber with granular ion exchange resin without any gaps, thereby improving the desalination efficiency and using a low-cost electrolytic cell. It has the excellent feature that it can be realized.

Further, the method for manufacturing an electrochemical water treatment apparatus of the present invention can provide a multilayer structure frame having a very simple structure and a very thin width between the desalting chamber and the concentrating chamber. By arranging porous pipes or rods in the connecting water channel, the deionization chamber can be easily filled with granular ion exchange resin without gaps, and can prevent outflow, so use granular ion exchange resin. And it is very easy to assemble.

[Brief description of the drawings]

FIG. 1 is a diagram showing an outline of an electrochemical water treatment apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic diagram of a desalination chamber of the electrochemical water treatment apparatus according to Embodiment 1 of the present invention.

FIG. 3 is a schematic diagram of a concentration chamber of the electrochemical water treatment apparatus according to Embodiment 1 of the present invention.

FIG. 4 is a schematic sectional view near a water passage of the electrochemical water treatment apparatus according to Embodiment 1 of the present invention.

FIG. 5 is an assembly view of the electrochemical water treatment apparatus according to Embodiment 1 of the present invention.

FIG. 6 is a schematic cross-sectional view of a conventional electrodialysis device.

FIG. 7 is a diagram showing a water collecting device in a desalination cell of a conventional electric deionized water producing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electrolyzer 2 Electrode cell 3 Electrode 4 Demineralization room 5 Concentration room 6 Deionization room water inlet pipe 7 Deionization room water discharge pipe 8 Concentration room water inlet pipe 9 Concentration room water discharge pipe 10 Electrode room cell water inlet pipe 11 Electrode room cell water discharge pipe REFERENCE SIGNS LIST 12 Polar chamber cell water inlet pipe 13 Polar chamber cell water discharge pipe 14 Spacer 15 Cation exchange membrane 16 Anion exchange membrane 17 Cation exchange resin beads 18 Anion exchange resin beads 19 Porous body 20 Connection hole 21 Porous tube 101 Anode plate 102 Cathode plate 103 Anode compartment 104 Cathode compartment 105 Anion exchange membrane 106 Cation exchange membrane 107 Demineralization compartment 108 Concentration compartment 121A First comb-shaped member 121B Second comb-shaped member 122A Member body 122B Member body 123 Water passage hole 124 protrusion 125 recess 126 fitting protrusion 127 fitting recess

Claims (4)

[Claims] A first spacer having an opening serving as a desalting chamber and a second spacer having an opening serving as a concentration chamber are alternately laminated, and a first pole chamber cell and a second pole chamber are formed from both sides. A laminate frame sandwiched between cells, a first electrode provided in the first pole chamber cell and serving as an anode, a second electrode provided in the second pole chamber cell and serving as a cathode, Between the first spacers and the second spacers, which are alternately stacked, constituting the body frame, the first spacers are disposed on the first pole chamber cell side of the first spacer, and the first pole chamber cells and the first spacer adjacent thereto are disposed. And an anion exchange membrane also disposed between the first spacer and the second spacer, which are alternately laminated to form the laminate frame, disposed on the second pole cell side of the second spacer. And between the second electrode chamber cell and a second spacer adjacent thereto. An electrochemical water treatment apparatus comprising: a cation exchange membrane; and a granular ion exchange resin filled in a desalting chamber of the first spacer, wherein the first spacer has a pair of first connection holes, Forming a pair of first water passages extending from the opening serving as the desalination chamber;
The second spacer is formed with a pair of second connection holes and a pair of second water passages extending from an opening serving as the enrichment chamber. The first water passage communicates with each of the desalting chambers, and is connected to the water discharge pipe of the desalination chamber and the water inlet pipe of the desalination chamber, and the first connection hole communicates with the second water passage to form the concentrator. An electrochemical water treatment apparatus, wherein each of the chambers is connected to a water discharge pipe of the concentration chamber and a water inlet pipe of the concentration chamber, and a water tap member is inserted into the second connection hole. 2. The electrochemical water treatment apparatus according to claim 1, wherein said water tap member is a porous rod or a porous tube through which water can pass. 3. The cell according to claim 1, wherein said first spacer and said second spacer have the same shape, and said first pole chamber cell and said second pole chamber cell have the same shape. Or the electrochemical water treatment apparatus according to 2. 4. An opening serving as a desalting chamber in the first spacer, a pair of first water passages extending from the opening, a pair of first connection holes, and an opening serving as a concentration chamber in the second spacer. A pair of second water passages extending from the opening;
A connection hole, a first electrode serving as an anode in the first pole chamber cell, a first spacer laminated on the first pole chamber cell via an anion exchange membrane, and further via a cation exchange membrane. Then, the second spacer is stacked in this order, and the second anion exchange cell is stacked through the anion exchange membrane. A second electrode serving as a cathode is provided in the second pole chamber cell. At this time, the desalting chamber communicates with the second connection hole and the first water passage so that the desalting chamber enters the desalting chamber discharge pipe and the desalting chamber. A water pipe connected to the first connection hole and the second water passage to connect the concentration chamber to a water discharge pipe in the concentration chamber and a water inlet pipe in the concentration chamber; and then, the desalting chamber in the first spacer. A method for producing an electrochemical water treatment apparatus in which each of the particles is filled with a granular ion exchange resin, At the time of assembling, the faucet member is inserted into the second connection hole located below, and then the granular ion-exchange resin is filled in the desalting chamber in the first spacer. A method for manufacturing an electrochemical water treatment apparatus, comprising inserting a faucet member.