JPH10330976A - Ozonized water generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the ozone generating efficiency in an ozonized water generator by washing off the bubbles of ozone and hydrogen remaining on the contact surface between the cation-exchange resin bed and electrodes and inhibiting electrolysis. SOLUTION: A cation-exchange resin bed 16 is provided in an electrolytic cell 10 between the anode 12 and cathode 13 on which a DC voltage is impressed. Desalted water is supplied to the cell 10, a DC voltage is impressed between the anode 12 and cathode 13 to conduct electrolysis, and ozonized water is generated. In the ozonized water generator, the resin bed 16 is constituted so that water is made passable, a feed passage P1 is provided to supply the desalted water to the resin bed 16, and a couple of discharge passages P2 and P3 are furnished correspondingly to the anode 12 and cathode 13 to discharge the electrolyzed water outside the cell 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to desalinated water (for example, water obtained by removing chlorine from tap water or the like using a purifier),
Alternatively, the present invention relates to an electrolytic ozone water generation device that generates ozone water by electrolyzing water subjected to distillation treatment.

[0002]

2. Description of the Related Art This type of apparatus is disclosed, for example, in Japanese Patent Publication No. 3-36.
No. 912, the ozone water generation apparatus disclosed in this publication accommodates a cation exchange resin layer in an electrolytic cell sandwiched between an anode and a cathode to which a DC voltage is applied. Desalinated water is supplied, and a DC voltage is applied between the anode and the cathode to generate ozone water.

[0003]

In the ozone water generator disclosed in the above-mentioned publication, the electrodes are made of a material having water permeability and air permeability, and water is supplied to the back surface of the anode. Therefore, part of the water supplied to the back surface of the anode passes through the anode, penetrates into the contact surface between the anode and the cation exchange resin layer, and is electrolyzed at this contact surface to generate ozone. . The generated ozone passes through the anode, elutes to the back of the anode, and gradually dissolves in the water flowing there to become ozone water. On the other hand, on the cathode side, hydrogen ions passing through the cation exchange resin layer become hydrogen at the contact surface between the cathode and the cation exchange resin layer, and this hydrogen passes through the cathode in a gaseous state to reach the back of the cathode, Exhausted through the exhaust path.

[0004] By the way, ozone generated at the contact surface between the anode and the cation exchange resin layer elutes to the back surface of the anode, and the water supplied to the back surface of the anode becomes ozone water. Since there is no typical flow of water, there is a possibility that air bubbles will remain here, which will obstruct the current flow between the two electrodes and deteriorate the ozone generation efficiency. Further, ozone generated at the contact surface does not quickly pass through the anode and dissolve in water, and it is difficult to generate high-concentration ozone water in a short time. On the other hand, hydrogen generated at the contact surface between the cathode and the cation exchange resin layer passes through the cathode in a gaseous state and is discharged from the back surface of the cathode, but there is no flow of water at the contact surface. There is a possibility that air bubbles remain as bubbles, which also causes a problem that the energization between the two electrodes is hindered and the efficiency of ozone generation is reduced.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to address the above-mentioned problems, and the invention according to claim 1 comprises a cation exchange resin layer comprising an anode and a cathode to which a DC voltage is applied. In an ozone water generating apparatus, which is sandwiched and accommodated in an electrolytic cell, supplies desalinated water to the electrolytic cell, applies a DC voltage between the anode and the cathode, performs electrolytic treatment, and generates ozone water. The cation exchange resin layer has a structure through which water can pass, and a supply path for supplying the desalted water to the cation exchange resin layer is provided,
The invention according to claim 2 is characterized in that a pair of lead-out passages are provided corresponding to the anode and the cathode to divide and guide the water after the electrolytic treatment to the outside of the electrolytic cell. Is a cation exchange resin layer composed of a granular or fibrous cation exchange resin. The invention according to claim 3 is characterized in that a pure water device is connected to the supply path and the pure water device is connected to the supply channel. The invention is characterized in that an introduction path for supplying undesalinated water such as tap water or well water is connected, and the invention according to claim 4 is connected to a chamber formed between the two electrodes via the anode. It is characterized in that a chamber is formed at the back of the anode, and an introduction channel for supplying untreated water such as tap water or well water is provided in this chamber.

[0006]

According to the first aspect of the present invention, the desalted water supplied from the supply path toward the cation exchange resin layer flows between the opposing surfaces of the two electrodes and is electrolyzed, so that hydrogen ions and water are removed. Oxide ions. The hydrogen ions are led to the cathode side and contact the cathode to become hydrogen, and the hydroxide ions are led to the anode side and contact the anode to become oxygen and ozone.

[0007] By the way, a part of the desalinated water supplied from the supply path becomes a water flow flowing along the contact surface between the anode and the cation exchange resin layer, and is formed on the contact surface between the anode and the cation exchange resin layer. The generated ozone is positively washed away from the contact surface by the water flow, and is dissolved in water (acidic water) flowing toward a lead-out passage provided corresponding to the anode, and this water is used as ozone water. In addition, a part of the desalinated water supplied from the supply path became a water flow flowing along the contact surface between the cathode and the cation exchange resin layer, and was generated at the contact surface between the cathode and the cation exchange resin layer. The fine bubbles of hydrogen are positively washed away from the contact surface by this water flow, and are discharged by water (alkaline water) flowing toward an outlet provided corresponding to the cathode.

Accordingly, ozone and hydrogen generated at the contact surface between each electrode and the cation exchange resin layer hardly remain as bubbles in the contact surface, so that energization between both electrodes is obstructed. Therefore, the generation efficiency of ozone (that is, the generation efficiency of ozone water) can be increased. In addition, ozone generated on the anode side is positively dissolved in the above-mentioned acidic water flow and is positively led out by the same water flow, so that high-concentration ozone water can be generated in a short time.

In the invention according to claim 2, since the cation exchange resin layer is composed of a granular or fibrous cation exchange resin, the above-mentioned ozone and hydrogen pass through between the particles or between the fibers together with the above-mentioned water flow, Eventually, it is led to each of the lead-out paths and does not remain in the cation exchange resin layer. Problems that occur when the cation exchange resin layer is made of a membrane-like cation exchange resin (such as when ozone and hydrogen From each contact surface, it penetrates into a complicated intricate gap between each electrode and the cation exchange resin layer, and becomes a bubble larger than this gap and remains in the gap between each electrode and the cation exchange resin layer,
In the end, bubbles accumulate and energization required for electrolysis becomes difficult, and the ozone generation efficiency is reduced). In the case of using a resin, it can be carried out at a lower cost than in the case of using a membrane-like cation exchange resin that has a high production cost. In the case of using resin, the flow of water is smoother than in the case of using a granular cation exchange resin, and a stable flow rate of water can be flowed to efficiently generate ozone water. Can be.

In the invention according to claim 3, since a pure water device is connected to the supply channel and an introduction channel for supplying untreated water such as tap water or well water is connected to the pure water device,
It is possible to remove chlorine ions contained in undesalted water and perform desalination treatment, as well as calcium ions and magnesium ions. The cation exchange resin layer does not adhere to the cation exchange resin layer, preventing the conduction of electricity between the two electrodes and preventing the cation exchange resin layer from functioning well. Ozone water can be generated efficiently without (or without regeneration).

[0011] In the invention according to claim 4, a chamber communicating with the chamber formed between the two electrodes via the anode is formed at the back of the anode, and this chamber is provided with undesalinated water such as tap water or well water. Is provided, the ozone water generated on the anode side and flowing out to the chamber behind the anode merges with the desalted untreated water supplied from the introduction path and is transported toward the extraction path. . Therefore, the desalinated water supplied through the supply path only needs to generate a positive water flow at the contact surface between the anode and the cation exchange resin layer, and the minimum amount of water required for ozone water generation is sufficient. Because it is good, it is possible to reduce the amount of expensive desalinated water used, reduce running costs, and if a pure water device is provided, reduce the amount of water to be purified. As a result, the life of the water purifier can be extended, and the running cost can also be reduced.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of an ozone water generation apparatus according to the present invention. The ozone water generation apparatus includes an electrolysis tank 10 for electrolyzing water supplied therein and a water supplied to the electrolysis tank 10. A water purifier 20 for purifying water;
The power supply device 30 is configured to apply a DC voltage to the electrolytic cell 10.

The electrolytic cell 10 includes a cell main body 11 and an anode 12 which partitions the inside of the cell main body 11 into three chambers R1, R2, and R3.
And a cathode 13 and a pair of diaphragms 14 and 15, and outlets 11b and 11c are provided above the side of the tank body 11 so as to open to the chambers R1 and R3, respectively. Water supply ports 11a1 and 11a2 are provided below the portion so as to open to the chamber R2. Outlet 1
Outlet pipes P2 and P3 are respectively connected to 1b and 11c, and a water supply pipe P1 is connected to water supply ports 11a1 and 11a2 by branching to branch pipes P1b and P1c at the tip. The anode 12 and the cathode 13 are porous electrodes, and are provided with highly water-permeable diaphragms 14 and 15 having pores of several μ to several tens μ on their opposing surfaces. The inside of the chamber R2 is filled with a cation exchange resin having a low production cost (the particle size is arbitrary, and may be about 1 mm, including a pellet), and a cation exchange resin layer 16 is formed to form a water passage. It is possible. In addition,
Since both diaphragms 14 and 15 are provided for the purpose of holding the cation exchange resin layer 16 composed of the granular cation exchange resin, if the cation exchange resin layer 16 can be held by the anode 12 and the cathode 13, they are omitted. It is also possible to carry out.

The water supply pipe P1 has one end of a main pipe part P1a connected to a water pipe (not shown), and the other ends having branch pipes P1b and P1b.
1c is connected to the water supply ports 11a1 and 11a2, respectively (see FIG. 2), and a pure water device 20 is interposed in the main pipe portion P1a.

The pure water device 20 includes a main pipe portion P1a of the water supply pipe P1.
The tap water flowing through the water supply pipe P1 is desalinated by a built-in ion exchange resin to be purified water, and the deionized water is supplied to the chamber R2. Has become. The power supply device 30 is for applying a DC voltage for electrolysis between the anode 12 and the cathode 13. The anode 12 is connected to the positive electrode, and the cathode 13 is connected to the negative electrode.

In the present embodiment configured as described above, pure water supplied from the water supply pipe P1 toward the cation exchange resin layer 16 flows between the opposing surfaces of the two electrodes 12, 13 and is electrolyzed, and hydrogen is supplied. Ions and hydroxide ions. The hydrogen ions are led to the cathode 13 side, contact with the cathode 13 to become hydrogen, and the hydroxide ions are led to the anode 12 side, and
2 and becomes oxygen and ozone.

Incidentally, a part of the pure water supplied from the water supply pipe P1 becomes a water flow flowing along the contact surface between the anode 12 and the cation exchange resin layer 16, and the water flows between the anode 12 and the cation exchange resin layer 16. Ozone generated at the contact surface is positively washed away from the contact surface by this water flow, and is dissolved in water (acidic water) flowing toward the outlet pipe P2 to turn this water into ozone water. Part of the pure water supplied from the water supply pipe P1 is
A water stream flows along a contact surface between the cathode 13 and the cation exchange resin layer 16, and the water flows along the cathode 13 and the cation exchange resin layer 16.
The fine bubbles of hydrogen generated at the contact surface with the water are positively washed away from the contact surface by this water flow, and are discharged by the water (alkaline water) flowing toward the outlet pipe P3.

Therefore, ozone and hydrogen generated at the contact surfaces between the electrodes 12 and 13 and the cation exchange resin layer 16 hardly remain as bubbles in the contact surfaces. Ozone generation efficiency (that is, ozone water generation efficiency) can be increased without hindering the current supply. In addition, ozone generated on the anode 12 side is positively dissolved in the above-mentioned acidic water flow and is actively led out by the same water flow, so that high-concentration ozone water can be generated in a short time. .

Since the two electrodes 12, 13 are always cooled by the positive water flow, the two electrodes 12, 13 are cooled.
Can prevent partial heating of the electrode surfaces of the two electrodes 12, 13
Can be improved in durability. Also, both electrodes 1
The electrolysis between the electrodes 2 and 13 generates acidic water on the anode 12 side and dissolves ozone in the acidic water.
Ozone water of high concentration can be generated from the characteristic of ozone that the solubility in the solvent increases as the H value decreases.

In the present embodiment, the cation exchange resin layer 16 is made of a granular cation exchange resin having a low production cost. It passes through the space between the particles of the ion exchange resin together with the above-mentioned water flow, and finally, the outlet pipe P
2 and P3, respectively, and the cation exchange resin layer 16
Problems that occur when the cation exchange resin layer 16 is made of a film-shaped cation exchange resin without remaining in the inside (ozone or hydrogen is applied to each of the electrodes 12, 13 and the cation exchange resin layer from each contact surface). 16 penetrates into a complicated intricate gap between the electrodes 12 and 1 and becomes bubbles larger than the gap.
3 and remains in the gap between the cation exchange resin layer 16 and finally bubbles accumulate, which makes it difficult to supply electricity necessary for electrolysis and lowers ozone generation efficiency. The effect can be obtained, and it can be carried out at a lower cost as compared with the case of using a membrane-like cation exchange resin which is expensive to produce.

Further, since the pure water device 20 is connected to the water supply pipe P1 connected to the water pipe, it is possible to remove chlorine ions contained in the tap water and to perform desalination treatment. Since magnesium ions and the like can also be removed, calcium ions, magnesium ions and the like do not adhere to the cation exchange resin layer 16, so that it is possible to prevent the interruption of electricity between the electrodes 12 and 13 and to prevent the cation exchange resin layer 16. Can be maintained satisfactorily for a long time, and ozone water can be efficiently generated without replacing (or regenerating) the cation exchange resin layer 16 for a long time.

In the above embodiment, the cation exchange resin layer 16 is made of a granular cation exchange resin. However, the cation exchange resin layer 16 is made of a fiber having a wire diameter of about 0.05 mm (a long fiber or a short fiber formed into a felt shape). ) -Shaped cation exchange resin (production cost is equivalent to that of the granular cation exchange resin). In this case, the water flows all the way along the fiber, so that the flow of the water becomes smoother than in the case of using a granular cation exchange resin, and a stable flow rate of the water flows into the chamber R2. And ozone water can be generated efficiently.

In the above embodiment, ozone and hydrogen generated at the contact surface between the cation exchange resin layer 16 and each of the electrodes 12 and 13 are washed away with pure water supplied from the water supply pipe P1. However, as shown by the imaginary line in FIG. 1, inlets 11d and 11e that open to the chambers R1 and R3 are provided at the bottom of the tank main body 11, respectively.
d and 11e are connected to introduction pipes P4 and P5 to connect chambers R1 and R3.
It may be implemented to supply tap water to the water. In this case, in order to prevent tap water from entering the chamber R2, 10 R is provided on the chamber R1 side of the electrode 12 and on the chamber R3 side of the electrode 13.
It is necessary to provide a diaphragm having pores of ５０50 μm. In this case, the ozone water generated on the anode 12 side and flowing out into the chamber R1 joins the tap water supplied from the inlet pipe P4, is conveyed toward the outlet pipe P2, and is discharged on the cathode 13 side. The water containing the fine bubbles of hydrogen generated and flowing into the chamber R3 joins the tap water supplied from the introduction pipe P5 and is conveyed toward the outlet pipe P3. Therefore, the water supply pipe P1
The pure water supplied through the air may generate a positive water flow on the contact surface between the electrodes 12, 13 and the cation exchange resin layer 16, and may be a minimum amount of water necessary for generating ozone water. Therefore, the consumption of expensive pure water can be reduced,
Since the running cost can be suppressed and the amount of water to be purified can be suppressed, the life of the pure water device 20 can be extended, and the running cost can be also reduced. In addition, in this case, it is also possible to implement without providing the introduction pipe P5, and it is also possible to implement without providing the introduction pipe P5 and the chamber R3.

FIG. 3 shows another embodiment of the ozone water generating apparatus according to the present invention.
An electrolytic cell 110 for electrolyzing water supplied to the inside, and a pure water device 12 for purifying tap water supplied to the electrolytic cell 110
0 and a power supply 13 for applying a DC voltage to the electrolytic cell 110
0.

The electrolytic cell 110 includes a cell main body 111 and an anode 112 and a cathode 113 which are disposed inside the cell main body 11 to face each other.
A partition plate 111d is provided substantially at the center of the anode 112 and the cathode 113 at the upper part of the tank main body 111, and outlets 111b and 111c are provided at positions facing the upper side, and at the lower part. Is provided with a water supply port 111a. Outlet pipes P12 and P13 are connected to the outlets 111b and 111c, respectively, and a water supply pipe P11 is connected to the water supply port 111a. Anode 1
The electrode 12 and the cathode 113 are air-impermeable and water-impermeable electrodes, are tightly assembled to the tank body 111, and have a granular cation having a particle diameter of about 1 mm, which is water-permeable between the electrodes 112 and 113. A cation exchange resin layer 116 filled with exchange resin is formed up to the lower end of the partition plate 111d. One end of the water supply pipe P11 is connected to a water pipe (not shown), and the other end is connected to the water supply port 111a, and a pure water device 120 is interposed on the way.

The pure water device 120 is interposed in the middle of the water supply pipe P11, and purifies the tap water flowing through the water supply pipe P11 by subjecting it to a desalination treatment with a built-in ion exchange resin.
The desalinated pure water is supplied to the tank body 111. The power supply 130 includes an anode 112 and a cathode 11.
This is for applying a DC voltage for electrolysis between the three electrodes, and the positive electrode is connected to the anode 112 and the negative electrode is connected to the cathode 113 side.

In the present embodiment configured as described above, pure water supplied from the water supply pipe P11 toward the cation exchange resin layer 116 flows between the opposing surfaces of the electrodes 112 and 113, and is electrolyzed. Ions and hydroxide ions.
The hydrogen ions are led to the cathode 113 side, come into contact with the cathode 113 and become hydrogen, and the hydroxide ions are led to the anode 112 side and come into contact with the anode 112 to become oxygen and ozone.

By the way, a part of the pure water supplied from the water supply pipe P11 becomes a water flow flowing along the contact surface between the anode 112 and the cation exchange resin layer 116, and the water flows between the anode 112 and the cation exchange resin layer 116. Ozone generated at the contact surface is actively washed away from the contact surface by this water flow,
The water is dissolved in water (acid water) flowing toward the outlet pipe P12, and this water is used as ozone water. Further, a part of the pure water supplied from the water supply pipe P11 is connected to the cathode 113 and the cation exchange resin layer 11.
6, and the fine bubbles of hydrogen generated at the contact surface between the cathode 113 and the cation exchange resin layer 116 are positively washed away from the contact surface by the water flow, and the outlet pipe. It is discharged by water (alkaline water) flowing toward P13.

Therefore, ozone and hydrogen generated at the contact surface between each of the electrodes 112 and 113 and the cation exchange resin layer 116 hardly remain as bubbles in the contact surfaces. Ozone generation efficiency (that is, ozone water generation efficiency) can be increased without hindering the current supply. In addition, ozone generated on the anode 112 side is positively dissolved in the above-mentioned acidic water flow and is positively led out by the same water flow, so that high-concentration ozone water can be generated in a short time.

Since the two electrodes 112 and 113 are always cooled by the positive water flow, the two electrodes 11 and 113 are cooled.
Partial heating of the electrode surfaces of the electrodes 2 and 113 can be prevented, and the durability of the electrodes 112 and 113 can be improved. Further, the anode 11 is formed by electrolysis between the electrodes 112 and 113.
On the second side, acidic water is generated, and ozone is dissolved in the acidic water. Therefore, a high-concentration ozone water can be generated from the characteristic of ozone that the solubility in the solvent increases as the pH value of the solvent decreases. .

In the present embodiment, since the cation exchange resin layer 116 is made of a granular cation exchange resin having a low manufacturing cost, the above-mentioned ozone and hydrogen are not applied to the granular cation exchange resin layer 116 constituting the cation exchange resin layer 116. The particles pass through the gaps of the ion-exchange resin together with the above-mentioned water flow, and are finally guided to the outlet pipes P12 and P13, respectively, and do not remain in the cation-exchange resin layer 116. Problems that occur when a cation-exchange resin is used (ozone and hydrogen are applied to each electrode 11 from each contact surface).
Infiltration into a complicated intricate gap between the cation exchange resin layer 116 and the electrodes 112 and 113 and the cation exchange resin layer 11
6, which remains in the gaps between them and eventually accumulates bubbles, making it difficult to supply electricity necessary for electrolysis and lowering ozone generation efficiency. It can be implemented at a lower cost than when it is made of a high-cost membrane-like cation exchange resin.

Further, since the pure water device 120 is connected to the water supply pipe P11 connected to the water pipe, chlorine ions contained in the tap water can be removed and desalination can be performed. Since magnesium ions and the like can also be removed, calcium ions, magnesium ions, and the like do not adhere to the cation exchange resin layer 116, preventing the conduction between the electrodes 112 and 113 from being hindered. Of the cation exchange resin layer 116
Ozone water can be efficiently generated without replacing (or regenerating) ozone water for a long period of time.

In the above embodiment (FIG. 3), the cation exchange resin layer 116 is made of a granular cation exchange resin. However, the cation exchange resin layer 116 is formed into a fiber having a wire diameter of about 0.05 mm (long fiber or felt). It is also possible to use a cation exchange resin in the form of a staple fiber that has been used. In this case, the water flows all the way along the fiber, so that the flow of the water becomes smoother than in the case of using a granular cation exchange resin, and a stable flow rate in the electrolytic cell 110 is obtained. Water can flow and ozone water can be generated efficiently.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an embodiment of an ozone water generation device according to the present invention.

FIG. 2 is a left side view of the embodiment shown in FIG.

FIG. 3 is a cross-sectional view showing another embodiment of the ozone water generation device according to the present invention.

[Explanation of symbols]

10, 110: electrolytic cell, 11, 111: cell body, 12,
112: anode, 13, 113: cathode, 16, 116: cation exchange resin layer, 20, 120: pure water device, 30, 13
0: power supply device, P1, P11: water supply pipe, P2, P12,
P3, P13 ... outlet pipe, P4, P5 ... inlet pipe.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Mikio Yamamoto 3-16 Hoshizaki Electric Co., Ltd.

Claims (4)

[Claims] 1. A cation exchange resin layer is accommodated in an electrolytic cell sandwiched between an anode and a cathode to which a DC voltage is applied. Desalted water is supplied to the electrolytic cell, and between the anode and the cathode. In an ozone water generating apparatus that applies electrolytic voltage by applying a DC voltage and generates ozone water, the cation exchange resin layer has a structure that allows water to pass therethrough, and the desalination treatment is performed on the cation exchange resin layer. An ozone water generating apparatus, wherein a supply path for supplying water is provided, and a pair of lead-out paths are provided corresponding to the anode and the cathode to divide and guide the water after the electrolytic treatment to the outside of the electrolytic cell. 2. The ozone water generating apparatus according to claim 1, wherein said cation exchange resin layer is a cation exchange resin layer made of a granular or fibrous cation exchange resin. 3. The water supply system according to claim 1, wherein a pure water device is connected to the supply channel, and an introduction channel for supplying untreated water such as tap water or well water is connected to the pure water device. Ozone water generator. 4. A chamber that communicates with the chamber formed between the two electrodes via the anode is formed at the back of the anode, and the chamber is supplied with untreated water such as tap water or well water. The ozone water generating apparatus according to claim 1 or 3, wherein a path is provided.