JP2011125823A - Electric deionized water making apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric deionized water making apparatus capable of stably obtaining a specified distance between electrodes and facilitating replacement of an ion exchanger charged into a desalting chamber. <P>SOLUTION: The electric deionized water making apparatus 7 includes a desalting chamber 10 with an ion exchanger charged between electrodes. The water making apparatus further includes a container 1 for the desalting chamber which leaves the main body 11 open at both ends and is formed with a connection portion 12 defining a distance between electrodes; a monolith ion exchanger 3 formed along the shape of the hollow portion 11a of the main body; and caps 2A, 2B for an electrode chamber formed with an electrode side connection portion 22 connected with the connection portion at a predetermined position. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an electric deionized water production apparatus for producing deionized water such as pure water.

  Conventionally, deionized water such as pure water or ultrapure water has been used in various industries such as semiconductor manufacturing industry, pharmaceutical industry, food industry, laboratories or fuel cells. An ionic water production apparatus is known (see Patent Documents 1 and 2, etc.).

  In these electric deionized water production apparatuses disclosed in Patent Documents 1 and 2, a plate-like frame body in which ion exchange membranes are stretched on both side surfaces is disposed between an anode and a cathode. By passing the treated water through the granular ion exchange resin filled in the body, the treated water is discharged as deionized water.

  The flat frame body is provided with a mounting hole, and the frame body is fixed between the electrodes by fastening a bolt inserted into the hole.

Japanese Patent No. 3009221 Japanese Patent Laid-Open No. 11-192491

  However, in the conventional structure for fastening bolts, the distance between the electrodes changes depending on the magnitude of the force for fastening the bolts, and the electrical resistance fluctuates, so there is a risk that individual differences may occur in performance such as power consumption for each device. is there.

  In addition, the process of filling the frame with granular ion exchange resin requires careful work by skilled workers, and further, an ion exchange membrane is stretched, and bolts are inserted to tighten the manufacturing process. There are many. Moreover, since the manufacturing process is also performed in an unstable state, there is a concern that the individual differences described above may occur.

  Furthermore, since there is a concern that the bolt may be damaged if the force to fasten the bolt is excessively large, careful work is required, and it is difficult to increase the work efficiency.

  On the other hand, after starting to use the electric deionized water production apparatus, the ion exchange resin may deteriorate and must be replaced. For example, when an electrical deionized water production device is used to purify circulating water such as cooling water for fuel cells, high-temperature treated water of 40 to 50 ° C. flows into the demineralization chamber, and anion exchange is weak against heat. It is conceivable that the resin deteriorates. Also, cation exchange resins may be irreversibly deteriorated by oxidizing substances such as residual chlorine.

  In addition, when humic substances (humic acid, fulvic acid, etc.), surfactants, oils and fats, organic substances present in factory effluent and sewage are contained in the treated water, they are adsorbed by the ion exchange resin and contaminated with organic substances. Occurs. The ion exchange resin in which organic contamination has occurred is not regenerated in a normal regenerating process, and thus must be replaced.

  When the ion exchange resin filled in the demineralization chamber is deteriorated in this way, unless only the ion exchange resin can be easily replaced, the electric deionized water production apparatus must be replaced. It is an economy.

  Therefore, the present invention provides an electric deionized water that can stably obtain a specified inter-electrode distance and can easily exchange at least a part of an ion exchanger filled in a demineralization chamber. The object is to provide a manufacturing apparatus.

  In order to achieve the above object, an electric deionized water production apparatus of the present invention is an electric deionized water production apparatus in which a demineralization chamber filled with an ion exchanger is formed between electrodes. A container for a desalination chamber in which both ends are opened and a connecting portion for defining a distance between the electrodes is formed, and a monolithic organic porous material that is molded according to the shape of at least a part of the inner space of the main body It is characterized by comprising an ion exchanger and an electrode chamber cap in which an electrode side connecting portion connected to the connecting portion at a predetermined position is formed.

  Here, the connection portion may be formed with one of a pair of connection mechanisms, and the connection mechanism may stop the axial insertion of the main body at a predetermined position. For example, the pair of connecting mechanisms can be twist screws.

  Thus, if the connecting portion is one of the paired connecting mechanisms, the assembly can be easily performed by simply fitting the member provided with the other connecting mechanism until it stops. In particular, if the coupling mechanism is a twist screw, the assembly can be completed simply by inserting the monolithic organic porous ion exchanger into the desalting chamber container and screwing the electrode chamber cap.

  The monolithic organic porous ion exchanger filled in the inner space of the desalinization chamber container has a continuous pore structure having a skeleton, and can be easily formed into a desired shape. For this reason, by using a monolithic organic porous ion exchanger formed in accordance with the shape of the inner space of the desalting chamber, it is possible to easily fill and replace the ion exchanger in the desalting chamber. it can.

  Further, the concave portion formed in the electrode chamber cap is filled with a granular ion exchanger, and the ion exchange membrane stretched on the open side of the concave portion with respect to the filled ion exchanger has the electrode chamber. The structure fixed to the inner surface of the cap for use may be sufficient.

  That is, when the concave portion of the electrode chamber cap is filled with a granular ion exchanger, and when the ion exchange membrane is stretched on the open side of the concave portion, the ion exchange membrane is attached to the inner surface of the electrode chamber cap with a double-sided tape or Secure with an adhesive.

  By modularizing the electrode chamber cap side in this way, the granular ion exchanger does not flow out of the recess even when the electrode chamber cap is removed from the desalination chamber container, and the monolithic shape of the desalination chamber The electric deionized water production apparatus can be regenerated by simply replacing the organic porous ion exchanger and mounting the electrode chamber cap.

  The inner space of the main body may be filled with the monolithic organic porous ion exchanger and the granular ion exchanger. Thus, if even a part of the ion exchanger filled in the desalting chamber is a monolithic organic porous ion exchanger, only that part can be easily exchanged.

  It is also possible to connect a plurality of the desalination chamber containers and attach the electrode chamber caps to both sides thereof.

  Thus, if it is the structure which arrange | positions the container for several desalination chambers between electrodes, it will only adjust the number of the containers for desalination chambers to connect the electric deionized water production apparatus according to the desired amount of treated water. Can be manufactured easily.

  The electric deionized water production apparatus of the present invention configured as described above is provided with a connecting portion for defining the distance from the electrode in the body of the container for the desalination chamber, and connected to the electrode chamber cap. The electrode-side connecting portion connected to the electrode at a predetermined position is provided. Therefore, when an electrode is arranged by connecting the connecting portion and the electrode-side connecting portion, an electrical deionization with a specified inter-electrode distance is always required. Since the water production apparatus is manufactured, it is possible to efficiently manufacture a product having a stable performance with a constant electric resistance.

It is a perspective view explaining the structure of the electrical deionized water manufacturing apparatus of embodiment of this invention. It is sectional drawing explaining the structure which attached the cap for electrode chambers to the both ends of the container for desalination chambers. It is sectional drawing explaining the structure of the electrical deionized water manufacturing apparatus of embodiment of this invention. It is explanatory drawing explaining piping of an electrical deionized water manufacturing apparatus. It is sectional drawing explaining the structure of the electrical deionized water manufacturing apparatus of Example 2. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First, the configuration of the electrical deionized water production apparatus 7 described in the present embodiment will be described with reference to FIGS. Here, FIG. 1 shows a monolithic organic porous material filled in the desalination chamber container 1 and electrode chamber caps 2A and 2B, which are the outer shell of the electric deionized water production apparatus 7, and the desalination chamber container 1. It is the figure which showed the external shape of the monolith ion exchanger 3 as an ion exchanger.

  FIG. 2 is a cross-sectional view showing a state in which the electrode chamber caps 2A and 2B are mounted on both sides of the desalination chamber container 1 without arranging the ion exchanger and the ion exchange membrane. 3 is a cross-sectional view of the electric deionized water production apparatus 7 in a state where the monolith ion exchanger 3, the ion exchangers 31A and 31B, and the ion exchange membranes 4 and 4 are arranged.

  This electric deionized water production apparatus 7 is pure water used in various industries such as semiconductor manufacturing industry, pharmaceutical industry, food industry or power plant, sugar solution, juice or wine production, laboratory or fuel cell. Or it is an apparatus for producing deionized water such as ultrapure water.

  In the electric deionized water production apparatus 7 described in this embodiment, the electrode chambers 20 and 20 and the demineralization chamber 10 are ion-exchanged between a cathode 51 and an anode 52 as electrodes as shown in FIG. It is formed by being partitioned by the films 4 and 4.

  The electrode chambers 20 and 20 are filled with granular ion exchangers 31A and 31B, respectively. As the ion exchangers 31A and 31B, anion exchange resins, cation exchange resins, a mixture of anion exchange resin and cation exchange resin, and the like can be used.

  Further, the desalting chamber 10 is filled with the monolith ion exchanger 3. The monolith ion exchanger 3 has a continuous pore structure having a skeleton, and can be easily formed into a desired solid. For example, if the inner space 11a of the desalting chamber 10 is cylindrical as shown in FIG. 1, the monolith ion exchanger 3 is formed into a cylindrical shape that matches the inner diameter and axial length of the inner space 11a. Can do.

  The monolith ion exchanger 3 can be used as either an anion exchanger or a cation exchanger. The monolith ion exchanger 3 has various structures. For example, the monolith ion exchanger 3 has an open-cell structure (see Japanese Patent Application Laid-Open No. 2002-306976) and a particle aggregation structure (Japanese Patent Application Laid-Open No. 2009-7550). Used with a co-continuous structure (see JP 2009-62512, JP 2009-67982, JP 2009-108294, JP 2009-191148, etc.) it can.

  The monolithic ion exchanger 3 having an open-cell structure is prepared, for example, by mixing an oil-soluble monomer not containing an ion exchange group, a surfactant, water and, if necessary, a polymerization initiator to prepare a water-in-oil emulsion. It is produced by introducing an ion exchange group into a monolithic organic porous body having an open cell structure obtained by polymerizing. In addition, the monolithic organic porous material described in JP-A-2002-306976 has continuous mesopores having an average diameter of 1 to 1000 μm (preferably 10 to 100 μm) in the macropores connected to each other and the walls of the macropores. It has a cell structure and has a total pore volume of 1 to 50 ml / g. The monolithic ion exchanger 3 having an open cell structure in which the ion exchange groups are uniformly distributed in the monolithic organic porous body has an ion exchange capacity of 0.5 mg equivalent / g dry porous body or more (preferably 2.0 mg equivalent). / G dry porous body or more).

  The particle aggregation structure is, for example, that organic polymer particles having a diameter of 1 to 50 μm (preferably 1 to 30 μm) having a crosslinked structural unit aggregate to form a three-dimensionally continuous skeleton part. It has three-dimensionally continuous pores with a pore diameter of 20-100 μm (preferably 20-90 μm) and a total pore volume of 1-5 ml / g. The monolith ion exchanger 3 having a particle aggregation structure into which ion exchange groups described in JP-A-2009-7550 are introduced has an ion exchange capacity per volume in a water-wet state of 0.3 mg equivalent / ml or more (preferably 0.5 to 5.0 mg equivalent / ml).

  The monolithic ion exchanger 3 having a co-continuous structure has, for example, a structure of an organic porous body in which a three-dimensional continuous skeleton phase and a three-dimensional continuous pore phase are entangled between the skeleton phases. Both are formed in a three-dimensionally continuous structure.

  Furthermore, the co-continuous structure described in Japanese Patent Application Laid-Open No. 2009-62512 is a continuous macropore structure in which bubble-shaped macropores overlap each other, and the overlapping portion becomes a common mesopore, and the average diameter of the mesopores is 20 to 200 μm ( Preferably 20-100 μm) and the total pore volume is 0.5-5 ml / g (preferably 0.8-4 ml / g). In addition, the monolith ion exchanger 3 in which ion exchange groups are introduced into this co-continuous structure has an average mesopore diameter of 30 to 300 μm (preferably 35 to 150 μm), and has an ion exchange capacity per volume in a water wet state. 0.4 mg equivalent / ml or more (preferably 0.4 to 1.8 mg equivalent / ml).

  In addition, the co-continuous structure described in Japanese Patent Application Laid-Open No. 2009-67982 has three-dimensionally continuous pores having a skeleton thickness of 0.8 to 40 μm (preferably 1 to 30 μm) and a diameter of 8 to 80 μm between the skeletons. And the total pore volume is 0.5 to 5 ml / g. In addition, the monolith ion exchanger 3 in which an ion exchange group is introduced into this co-continuous structure has a skeleton thickness of 1 to 60 μm (preferably 3 to 58 μm) and a pore diameter of 10 to 100 μm (preferably 20 to 20 μm). 80 μm), and the ion exchange capacity per volume in a wet state of water is 0.3 mg equivalent / ml or more (preferably 0.4 to 1.8 mg equivalent / ml).

  Further, the co-continuous structure described in JP-A-2009-108294 has a composite structure in which a large number of particles are fixed on the skeleton surface of the organic porous material or protrusions are formed. In addition, bubble-like macropores overlap each other, the average diameter of the overlapping mesopores is 20 to 200 μm (preferably 20 to 100 μm), the thickness of the skeleton is 0.8 to 40 μm (preferably 1 to 30 μm), and the diameter between the skeletons Is a continuous macropore structure in which three-dimensionally continuous pores of 8 to 80 μm are arranged. The diameter of the particle body on the skeleton surface (or the maximum diameter of the protrusion) is 2 to 20 μm (preferably 3 to 10 μm). The total pore volume is 0.5 to 5 ml / g (preferably 0.8 to 4 ml / g). Further, when ion exchange groups are introduced into this co-continuous structure, the average pore diameter becomes 10 to 150 μm (preferably 10 to 120 μm), and the ion exchange capacity per volume in a water-wet state is 0.2 mg equivalent / ml or more (preferably 0.3 to 1.8 mg equivalent / ml).

Moreover, the co-continuous structure described in JP-A-2009-191148 has a honeycomb-like porous structure in the surface layer portion of the skeleton of the organic porous body. Furthermore, bubble-like macropores overlap each other, and the average diameter of the overlapping mesopores is 20 to 200 μm (preferably 20 to 100 μm). The porous structure is a structure in which an infinite number of pores having a diameter of 0.1 to 20 μm (preferably 0.1 to 10 μm) exist. As described above, the co-continuous structure having a porous structure in the surface layer of the skeleton has a specific surface area of 20 to 70 m ² / g, which is significantly large. The total pore volume is 0.5 to 5 ml / g (preferably 0.8 to 4 ml / g). Furthermore, when ion exchange groups are introduced into this co-continuous structure, the average diameter of the mesopores is 30 to 300 μm (preferably 35 to 150 μm), and the ion exchange capacity per volume in a water-wet state is 0.4 mg equivalent / ml or more. (Preferably 0.4 to 1.8 mg equivalent / ml).

  The ions in the water to be treated WA that have flowed into the demineralization chamber 10 filled with such a monolithic ion exchanger 3 from the inlet 13 are captured by the monolithic ion exchanger 3, and the deionized water WB becomes the outlet 14. Discharged from.

  Further, the ions captured by the monolith ion exchanger 3 pass through the ion exchange membrane 4 due to the potential gradient between the cathode 51 and the anode 52, move to the electrode chamber 20, and are discharged from the electrode water outlet 25.

  The ion exchange membrane 4 includes an anion exchange membrane, a cation exchange membrane, and the like, and may be set according to the type of ions to be moved from the desalting chamber 10 toward the electrode chamber 20.

  In the electric deionized water production apparatus 7, the electrode chamber 20 also has the function of a concentration chamber in which such ions move, and the ions moved from the demineralization chamber 10 are formed as one chamber. Collected in the electrode chamber 20 formed.

  In addition, the electric deionized water production apparatus 7 configured as described above has a distance between electrodes (a distance between the cathode 51 and the anode 52, more specifically, a distance between the cathode plate 51a and the anode plate 52a). If it changes, the electrical resistance between electrodes will also fluctuate with it and the power consumption of an apparatus will fluctuate.

  Therefore, the details of the configuration of the desalination chamber container 1 of the present embodiment capable of stably obtaining the specified inter-electrode distance and the electrode chamber caps 2A and 2B mounted on both sides thereof are shown in FIG. , 2 with reference to FIG.

  This demineralization chamber container 1 includes a cylindrical main body 11, a connecting portion 12 serving as a means for connecting to the electrode chamber cap 2A (2B), an inlet port 13 for taking in the water to be treated WA, and deionized water WB. And an outlet 14 for discharging the water.

  The desalination chamber container 1 is a member formed of an insulating material such as a synthetic resin. A cylindrical inner space 11a is formed inside the main body 11, and both ends in the axial direction thereof are open.

  Further, a cylindrical inflow port 13 protrudes on the outer surface 11b side of the main body 11, and the inflow port 13 and the inner space portion 11a are formed in the main body 11 as schematically shown by a broken line in FIG. Are connected by an inflow path 13a.

  Further, a cylindrical outflow port 14 projects from the outer surface 11b side of the main body 11, and the inner space portion 11a and the outflow port 14 are formed in the main body 11 as schematically shown by the broken lines in FIG. Are connected by an outflow path 14a.

  Moreover, the connection part 12 formed in the outer surface 11b near the both ends of the main body 11 is one of a pair of connection mechanisms. Here, a twist screw will be described as the connection mechanism.

  As shown in FIG. 1, the connecting portion 12 includes a protrusion 12a extending in the circumferential direction so as to be parallel to the end face at a position spaced from the end face of the main body 11 in the axial direction, and the protrusion It is formed in a substantially L shape in plan view by a stopper 12b extending from the end of the strip 12a to the center side in the axial direction of the main body 11 at a substantially right angle. A projection 12c for preventing reverse rotation of the electrode chamber cap 2A (2B) extends in the axial direction of the main body 11 at a position shifted in the circumferential direction from the stopper 12b on the inner corner side of the substantially L-shaped connecting portion 12. Has been issued.

  And in this Embodiment, two such connection parts 12 are formed in the vicinity of each edge part on the outer surface 11b of the main body 11 so that it may oppose on both sides of the inner space part 11a. In addition, the two connecting portions 12 and 12 arranged in the circumferential direction of the main body 11 are attached so as to be in the same direction when viewed in the circumferential direction.

  On the other hand, the electrode chamber cap 2A (2B) is connected to the outer shell 21 having the recess 21a, the electrode attachment port 23 for attaching the electrode (cathode 51 or anode 52), and the connecting portion 12 at a predetermined position. The electrode side connection part 22, the electrode water inflow port 24 which takes in the electrode water WC, and the electrode water outflow port 25 which discharges the electrode water WD are provided.

  The electrode chamber cap 2A (2B) is a member formed of an insulating material such as a synthetic resin. A recess 21a is formed inside the outer shell 21, and the side to be attached to the desalin chamber 1 is opened. ing.

  As shown in FIG. 2, the recess 21 a has a first space 211 that accommodates the axial end of the desalinization chamber container 1, and a width that is perpendicular to the axial direction of the first space 211. The second space 212 on the bottom side is formed in a step shape. Further, a through hole is formed as an electrode mounting opening 23 on the bottom surface of the recess 21a.

  Furthermore, the electrode side connection part 22 formed in the internal peripheral surface of the open side of the recessed part 21a is a connection mechanism which becomes a pair with the connection part 12 formed in the container 1 for desalination chambers.

  The electrode-side connecting portion 22 has a width slightly wider than the width of the protrusion 22a extending in the circumferential direction at a position adjacent to the open end surface of the outer shell 21 and the protrusion 12a of the connecting portion 12 on the main body 11 side. The groove portion 22b and the step portion 22c forming one side surface of the groove portion 22b are formed. Further, a stop groove 22d that meshes with the protrusion 12c of the desalination chamber container 1 is formed on the inner peripheral surface of the protrusion 22a.

  The protrusion 22a is formed to have a length that can be inserted into a gap between the connecting portions 12 and 12 provided at intervals in the circumferential direction near the end of the main body 11. Further, the groove 22b is formed to have such a width that the protrusion 12a can move relatively along the protrusion 22a when the electrode chamber cap 2A (2B) is rotated.

  Furthermore, the stopper 12b on the main body 11 side is capable of stopping the rotation of the electrode chamber cap 2A (2B) when the electrode chamber cap 2A (2B) rotates and the circumferential end surface of the protrusion 22a collides. It is formed in the size. Further, at this stop position, the projection 12c on the desalting chamber container 1 side and the retaining groove 22d of the protrusion 22a mesh with each other to prevent reverse rotation of the electrode chamber cap 2A (2B).

  At this stop position, the rotation of the electrode chamber cap 2A (2B) in the circumferential direction is stopped, and the electrode chamber cap 2A (2B) is moved toward the desalting chamber container 1, in other words, the body 11 The insertion in the axial direction is also stopped. That is, at this stop position, the protrusion 12a of the main body 11 is sandwiched between the protrusion 22a and the stepped portion 22c in the groove portion 22b of the electrode chamber cap 2A (2B), and therefore the movement of the main body 11 in the axial direction is prevented. Limited. And the relative positional relationship of the main body 11 axial direction becomes always constant between the container 1 for desalination chambers and the cap 2A for electrode chambers (2B) connected by such a connection mechanism.

  Further, a cylindrical electrode water inlet 24 protrudes on the outer surface 21b side of the outer shell 21, and the electrode water inlet 24 and the recess 21a are formed in the outer shell 21 as schematically shown by the broken line in FIG. They are connected by the formed inflow path 24a.

  Further, a cylindrical electrode water outlet 25 is projected on the outer surface 21b side of the outer shell 21, and the recess 21a and the electrode water outlet 25 are formed on the outer shell 21 as schematically shown by the broken line in FIG. It is connected by the formed outflow path 25a.

  Next, the production process of the electric deionized water production apparatus 7 of the present embodiment and the exchange process of the monolith ion exchanger 3 will be described and the operation thereof will be described.

  First, as shown in FIG. 3, the monolith ion exchanger 3 is filled in the inner space 11 a of the desalinization chamber container 1. Here, when filling the monolith ion exchanger 3, members such as slits and meshes are attached to the openings on the inner space 11a side of the inflow path 13a and the outflow path 14a as necessary.

  The monolith ion exchanger 3 is formed in a cylindrical shape having an outer shape slightly smaller than the inner peripheral shape of the inner space portion 11a. For this reason, as shown in FIG. 1, the filling operation can be completed only by inserting the columnar monolith ion exchanger 3 into the cylindrical inner space 11a of the container 1 for the desalination chamber. For example, the monolith ion exchanger 3 having a filling ratio of 0.9 to 1.5 in volume ratio is used.

  Thus, if it is the structure which inserts the solid (cylindrical) monolith ion exchanger 3 in the container 1 for desalination chambers, compared with the case where it fills with a granular ion exchanger, a desired filling rate is ensured easily. be able to. That is, when the monolith ion exchanger 3 is used, the filling rate is not determined by the accuracy of the filling operation, but is determined by the physical properties of the monolith ion exchanger 3. For this reason, if the monolith ion exchanger 3 satisfying a desired filling rate is manufactured, the filling rate of the desalting chamber 10 can be easily set to a desired value even if it is not a skilled engineer.

  Subsequently, two electrode chamber caps 2A and 2B are prepared, the cathode 51 is attached to one electrode chamber cap 2A, and the anode 52 is attached to the other electrode chamber cap 2B.

  The cathode 51 includes a cathode plate 51a and a cathode bar 51b connected to the center of the cathode 51. By inserting the cathode bar 51b into the electrode mounting port 23 from the open side of the recess 21a, the cathode 51 is placed in the electrode chamber. It can be attached to the cap 2A. Although not shown, the cathode 51 is fixed to the electrode chamber cap 2A by fastening the cathode bar 51b with a nut or the like.

  The anode 52 is also composed of an anode plate 52a and an anode rod 52b, and is attached and fixed to the electrode chamber cap 2B in the same manner as the cathode 51.

  Further, the concave portion 21a of the electrode chamber cap 2A (2B) is filled with a granular ion exchanger 31A (31B). At the time of filling, although not shown, members such as a slit for preventing the outflow of the ion exchanger 31A (31B) are attached to the openings on the recess 21a side of the inflow path 24a and the outflow path 25a as necessary.

  Further, the open side of the recess 21 a filled with the ion exchanger 31 </ b> A (31 </ b> B) is shielded by stretching the ion exchange membrane 4. For example, a double-sided tape (not shown) is attached to the periphery of the ion exchange membrane 4, and the ion exchange membrane 4 is fixed to the inner surface of the electrode chamber cap 2A (2B) with the double-sided tape. In addition, it can replace with a double-sided tape and can also use an adhesive agent. Moreover, the structure which arrange | positions the member which fixes the ion exchange membrane 4 to the internal peripheral surface of the open side of the recessed part 21a may be sufficient.

  If the electrode chamber cap 2A (2B) is modularized in such a structure that can prevent the outflow of the ion exchanger 31A (31B) filled with the ion exchange membrane 4, the electrode chamber cap 2A (2B) Can be easily attached and detached.

  Although not shown, a gasket and an O-ring for enhancing water tightness are disposed on the inner peripheral surface on the open side of the recess 21a as necessary.

  And the protrusion 22a of the electrode chamber cap 2A which attached the cathode 51 with respect to the container 1 for the desalination chamber filled with the monolithic ion exchanger 3 does not have the protrusion 12a of the outer surface 11b of the main body 11. The position is adjusted so as to come to the position, and the electrode chamber cap 2A is pushed in. Then, the step 22c of the electrode chamber cap 2A comes into contact with the protrusion 12a of the main body 11, and the protrusion 22a on the electrode chamber cap 2A side and the protrusion 12a on the main body 11 side become parallel.

  Further, when the electrode chamber cap 2A is turned counterclockwise as viewed in FIG. 1, the tip of the ridge 12a enters the groove 22b, and the tip of the ridge 22a that slides relatively along the ridge 12a is: The rotation stops by getting over the protrusion 12c and hitting the side surface of the stopper 12b.

  Further, since the protrusion 12c bites into the stop groove 22d at this stop position, the reverse rotation of the electrode chamber cap 2A is prevented, and the electrode chamber cap 2A is fixed to the desalting chamber container 1.

  Thus, the connecting portion 12 and the electrode side connecting portion 22 form a twist screw to form a twist screw, the stopper 12b that stops the circumferential movement at a predetermined position, and the step that stops the insertion of the main body 11 in the axial direction. If the electrode chamber cap 2A is attached to the desalination chamber container 1 provided with the portion 22c, the assembly can be completed only by screwing.

  Further, since the protrusion 12a extending in the circumferential direction on the desalinization chamber container 1 side has a connecting structure sandwiched between the protrusion 22a and the step portion 22c of the electrode chamber cap 2A, the axial direction of the main body 11 The coupling force is strong, and there is no deviation even with respect to impact or an increase in internal pressure.

  The electrode chamber cap 2B to which the anode 52 is attached is also mounted by connecting to the connecting portion 12 of the desalination chamber container 1 in the same manner as described above.

  When the electrode chamber caps 2A and 2B are attached to the desalination chamber container 1 in this manner, the relative positional relationship in the axial direction of the main body 11 between the desalination chamber container 1 and the electrode chamber caps 2A and 2B is constant. Therefore, the distance between the cathode plate 51a and the anode plate 52a as shown in FIG. 3 is always a prescribed distance.

  For this reason, the distance between the electrodes of the electric deionized water production apparatus 7 assembled using the desalinization chamber container 1 and the electrode chamber caps 2A and 2B is always a prescribed distance and varies from individual to individual. Therefore, it is possible to stably manufacture a device exhibiting a constant electric resistance, that is, a constant power consumption.

  Further, after the electrode chamber caps 2A and 2B are mounted on both sides of the desalination chamber container 1, piping is performed as shown in FIG.

  First, a water supply pipe 61 that conveys the water to be treated WA is connected to the inlet 13 of the desalination chamber container 1. A supply pipe 62 is connected to the outlet 14 for discharging the deionized water WB treated in the desalting chamber 10.

  The supply pipe 62 extends to a device that uses the deionized water WB, and a branch pipe 63 is connected in the middle of the supply pipe 62, and an end of the branch pipe 63 is an electrode chamber to which the cathode 51 is attached. Connected to the electrode water inlet 24 of the cap 2A.

  The electrode water outlet 25 of the cathode chamber cap 2A on the cathode 51 side and the electrode water inlet 24 of the electrode chamber cap 2B on the anode 52 side are connected by a connecting pipe 64.

  Furthermore, a discharge pipe 65 for discharging electrode water WD (concentrated water) that has passed through the electrode chamber 20 that also serves as a concentrating chamber is connected to the electrode water outlet 25 of the electrode chamber cap 2B to which the anode 52 is attached.

  Since such piping should just be performed with respect to the inlet 13, the outlet 14, the electrode water inlets 24 and 24, and the electrode water outlets 25 and 25 which protruded to the outer surface side of the electric deionized water production apparatus 7, Good workability and easy assembly.

  In consideration of the workability of the piping, the inlet 13, the outlet 14, the electrode water inlets 24, 24, and part or all of the electrode water outlets 25, 25 may be configured to protrude in the same direction. .

  A part of the deionized water WB thus generated by the branch pipe 63 is taken out and passed through the electrode chamber 20 on the cathode 51 side and the electrode chamber 20 on the anode 52 side, thereby staying in the electrode chambers 20 and 20. The electrode water WD can be forcibly discharged together with the ions.

  In particular, in the electrode chamber 20 on the anode 52 side, a large number of ions that have moved from the desalting chamber 10 are accumulated and become concentrated water, and the electrode water WD that becomes this concentrated water is forcibly discharged. Thus, the processing efficiency of the electric deionized water production apparatus 7 can be improved.

  The electric deionized water production apparatus 7 functions regardless of whether the inlet 13 is on the upper side or the lower side. For example, the water to be treated WA rises up the demineralization chamber 10 with the inlet 13 down. After that, if it is installed in the direction discharged from the upper outlet 14, high-purity deionized water WB with a high removal rate can be produced.

  Furthermore, the electrical deionized water production apparatus 7 manufactured in this way can be made small, for example, about 70 mm in diameter and about 80 mm in length, so that it can be used for pure water production equipment and research for household fuel cells. The present invention can be applied to equipment that requires downsizing, such as a room-use pure water production apparatus.

  For example, when the electric deionized water production apparatus 7 manufactured as described above is mounted to purify circulating water such as cooling water for household fuel cells, the water to be treated WA having a high temperature of 40 to 50 ° C. Will flow into the desalting chamber 10. And since the anion component increases in the circulating water of the fuel cell, the desalting chamber 10 is filled with an anion exchanger.

  However, since the anion exchanger is vulnerable to heat, it is considered that the monolith ion exchanger 3 filled in the desalting chamber 10 deteriorates before other components as a result of using the fuel cell for a long time.

  Then, the exchange process which replaces | exchanges the monolith ion exchanger 3 with which the desalination chamber 10 was filled is demonstrated with respect to the electrical deionized water manufacturing apparatus 7 which passed predetermined use conditions, such as use time or a use period.

  First, the use of the electric deionized water production apparatus 7 is stopped, and the internal water is drained as necessary. Then, the water supply pipe 61, the supply pipe 62, the branch pipe 63, the connection pipe 64, and the discharge pipe 65 are removed from the desalination chamber container 1 and the electrode chamber caps 2A and 2B.

  Subsequently, the electrode chamber caps 2A and 2B are twisted to remove the electrode chamber caps 2A and 2B from the desalination chamber container 1. Both electrode chamber caps 2A and 2B may be removed, or only one of them may be removed.

  The electrode chamber caps 2A and 2B are filled with granular ion exchangers 31A and 31B, but the open side of the recess 21a is blocked by the ion exchange membrane 4 fixed to the inner surface. Even if the chamber caps 2A and 2B are removed, the ion exchangers 31A and 31B do not leak out.

  And the used monolith ion exchanger 3 is taken out from the container 1 for desalination chambers, and a new monolith ion exchanger 3 is inserted into the inner space 11a instead. Since the monolith ion exchanger 3 is a cylindrical solid, it can be easily taken in and out from the inner space portion 11a.

  Further, the modularized electrode chamber caps 2A and 2B are mounted again on both sides of the desalination chamber container 1 in which the monolith ion exchanger 3 has been replaced, and the water supply pipe 61, the supply pipe 62, the branch pipe 63, and the connection pipe 64 and the discharge pipe 65 are piped.

  If the electric deionized water production apparatus 7 can be regenerated by simply exchanging the monolith ion exchanger 3 in this way, an inspector or the like can easily carry out as part of maintenance management such as during periodic inspection.

  An electric deionized water production apparatus 7 described in the present embodiment and an electric deionized water production apparatus (stack and frame type) for fastening and fixing a flat frame body with bolts between conventional electrodes. Table 1 shows the results of measuring 15 electrical resistors between the electrodes of each device.

  According to the results in Table 1, the conventional stack and frame type has a standard deviation of electrical resistance spreading in the range of 3.3% of the average value, whereas the electrical deionized water production apparatus of the present embodiment. 7 is within the range of 1.3%, and it can be seen that a product with stable power consumption can be manufactured compared to the conventional structure.

Hereinafter, an electric deionized water production apparatus 7A of Example 2 in a form different from the above-described embodiment will be described with reference to FIG. The description of the same or equivalent parts as those described in the above embodiment will be given the same reference numerals.
In the electric deionized water production apparatus 7A of the second embodiment, as shown in FIG. 5, the inner space 11a of the demineralization chamber container 1 is filled with the monolithic ion exchanger 3 and the granular ion exchanger 32. Is done.

  That is, in the left half of the desalting chamber 10 shown in FIG. 5, the cylindrical monolith ion exchanger 3 having a height that is about half the axial length of the inner space 11 a of the main body 11 is arranged. Further, the right half of the desalting chamber 10 shown in FIG. 5 is filled with a granular ion exchanger 32 as in the electrode chamber 20.

  Here, the monolith ion exchanger 3 and the ion exchanger 32 filled in the desalting chamber 10 can be either an anion exchanger or a cation exchanger.

  Further, in Example 2 in which the desalination chamber 10 is filled with the granular ion exchanger 32, the electric deionized water production apparatus 7A is arranged so that the electrode chamber cap 2A in FIG. Work in a standing position.

  That is, in the manufacturing process, the electrode chamber cap 2A is installed so that the opening side of the concave portion 21a faces upward, the granular ion exchanger 31A is filled in the concave portion 21a, and the ion exchange membrane 4 is stretched thereon. .

  Subsequently, the desalination chamber container 1 is fitted into the electrode chamber cap 2 </ b> A, and the lower half of the inner space 11 a of the main body 11 is filled with the granular ion exchanger 32. Furthermore, the monolith ion exchanger 3 formed into a cylindrical shape with the height of the upper half of the inner space 11a is inserted from above. Then, the electrode chamber cap 2B in which the ion exchanger 31B and the ion exchange membrane 4 are arranged is fitted into the desalination chamber container 1 to complete the assembly.

  On the other hand, in the exchange process of the monolith ion exchanger 3, the electric deionized water production apparatus 7A is set up so that the electrode chamber cap 2A is at the bottom, and the upper electrode chamber cap 2B is twisted to decontaminate the vessel. Remove from 1.

  Subsequently, the used monolith ion exchanger 3 is taken out from the desalination chamber container 1, and a new monolith ion exchanger 3 is inserted into the inner space 11a instead. As described above, the monolith ion exchanger 3 filled in a part of the desalting chamber 10 can be easily replaced even if it deteriorates.

In the second embodiment, the case has been described in which the desalting chamber 10 is filled with the monolith ion exchanger 3 and the ion exchanger 32 in half, but this ratio can be arbitrarily set. However, it is preferable that the thickness of the monolith ion exchanger 3 is set to 5 mm or more. Moreover, the structure by which the monolith ion exchanger 3 is arrange | positioned at the cathode 51 side may be sufficient.
Other configurations and functions and effects are substantially the same as those in the above-described embodiment, and thus description thereof is omitted.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  For example, in the above-described embodiment, the case where the monolith ion exchanger 3 deteriorated mainly by heat is exchanged has been described. However, the present invention is not limited to this, and humic substances (humic acid, fulvic acid, etc.), surface activity The monolith ion exchanger 3 can be easily exchanged even when organic contamination is caused by agents, oils and fats, or other organic substances, or when irreversible deterioration occurs due to oxidizing substances such as residual chlorine.

  Further, in the above-described embodiment, the twist screw formed in parallel with the end surface of the main body 11 that does not move in the axial direction of the main body 11 when rotating in the circumferential direction has been described as a coupling mechanism that defines the distance between the electrodes. However, the present invention is not limited to this, and a twist screw formed obliquely with respect to the end surface of the main body 11 that also moves in the axial direction of the main body 11 when rotated in the circumferential direction may be used. Furthermore, when the insertion in the axial direction of the main body 11 stops at a predetermined position, such as a cap nut provided with a stopper or the like for stopping screwing at a predetermined position, or a structure in which a flexible claw is inserted into the recess Any coupling mechanism may be used as long as the distance can be defined.

  In addition, the connecting portion 12 provided in the main body 11 in the embodiment is provided on the electrode chamber cap 2A (2B) side, and the electrode side connecting portion 22 provided in the recess 21a is provided on the desalting chamber container 1 side. In addition, any of the pair of coupling mechanisms may be provided on the desalting chamber container 1 side.

  Furthermore, in the above-described embodiment and Example 2, the configuration in which the electrode chamber caps 2A and 2B are mounted on both sides of the single desalination chamber container 1 has been described, but the present invention is not limited thereto. A plurality of demineralization chamber containers 1,... Are connected with a cap nut or the like that defines the distance between the electrodes as described above, and electrode chamber caps are provided on both sides of the desalination chamber containers 1,. The structure which mounts 2A and 2B may be sufficient. In this way, by adjusting the number of the desalination chamber containers 1,..., The treatment capacity (treatment water amount) of the electric deionized water production apparatus can be easily adjusted.

  Moreover, in the said embodiment and Example 2, although the main body 11 and the outer shell 21 demonstrated the cylindrical thing, it is not limited to this, Cross-sectional view polygons, such as a square cylinder, and cross-section view ellipse, It may be provided with a main body and an outer shell. Furthermore, the combination of the form of the desalination chamber container 1 and the electrode chamber cap 2A (2B) is not limited to the above embodiment.

  Furthermore, in the above embodiment and Example 2, the electrode chamber 20 is formed as one chamber that also serves as a concentrating chamber. However, the present invention is not limited to this, and is already in parallel with the ion exchange membrane 4 inside the recess 21a. A concentration chamber can be provided between the electrode chamber 20 and the desalting chamber 10 by adding a single ion exchange membrane.

  Moreover, in the said embodiment and Example 2, although the inflow port 13, the outflow port 14, the electrode water inflow port 24, and the electrode water outflow port 25 protruded from the outer surface side of the main body 11 or the outer shell 21, it is limited to this. Instead of this, a structure in which an opening communicating with the inner space 11a or the recess 21a is provided on the outer surface may be used.

DESCRIPTION OF SYMBOLS 1 Desalination chamber container 10 Desalination chamber 11 Main body 11a Inner space part 11b Outer surface 12 Connection part 12b Stopper 13 Inlet 14 Outlet 2A, 2B Electrode chamber cap 20 Electrode chamber 21 Outer shell 21a Recess 21b Outer surface 22 Electrode side connection Portion 23 Electrode attachment port 24 Electrode water inlet 25 Electrode water outlet 3 Monolith ion exchanger (monolithic organic porous ion exchanger)
31A, 31B Ion exchanger 32 Ion exchanger 4 Ion exchange membrane 51 Cathode (electrode)
52 Anode (electrode)
64 Connecting pipe (pipe)
7, 7A Electric deionized water production equipment WA Treated water WB Deionized water WC, WD Electrode water

Claims (6)

An electric deionized water production apparatus in which a demineralization chamber filled with an ion exchanger is formed between electrodes,
A container for a desalination chamber in which both ends of the main body are opened and a connecting portion for defining a distance between the electrodes is formed;
A monolithic organic porous ion exchanger formed according to the shape of at least a part of the inner space of the main body,
An electric deionized water production apparatus comprising: an electrode chamber cap formed with an electrode side connection portion connected to the connection portion at a predetermined position.   2. The structure according to claim 1, wherein one of a pair of coupling mechanisms is formed in the coupling portion, and the coupling mechanism has a structure in which the axial insertion of the main body stops at a predetermined position. Electric deionized water production equipment.   The electric deionized water production apparatus according to claim 2, wherein the pair of connection mechanisms are twist screws.   The concave portion formed in the electrode chamber cap is filled with a granular ion exchanger, and the ion exchange membrane stretched on the open side of the concave portion with respect to the filled ion exchanger is the electrode chamber cap. The apparatus for producing electric deionized water according to any one of claims 1 to 3, wherein the apparatus is fixed to an inner surface of the deionized water.   The electric desorption according to any one of claims 1 to 4, wherein an inner space of the main body is filled with the monolithic organic porous ion exchanger and a granular ion exchanger. Ionized water production equipment.   The electric deionized water production apparatus according to any one of claims 1 to 5, wherein a plurality of the demineralization chamber containers are connected, and the electrode chamber caps are mounted on both sides thereof.

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