JPH1112774A - Ozonized water producing device and production of ozonized water by the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ozonized water producing device which is relatively compact, with the respective equipments easily repaired and inspected, capable of stably producing a large amt. ozonized water and capable of efficiently producing ozonized water with the concn. fit for the uses. SOLUTION: An electrolytic cell 2 for electrolyzing water to generate ozone is provided outside an ozonized water storage tank 1, a circulating pipeline 3 is furnished to connect the anode side of the cell 2 and the tank 1. A water feed pipe 4, a pipe 5 for delivering ozonized water to the point of use from the tank 1 and a monitor 6 for monitoring the ozonized water concn. in the tank 1 are provided to the ozonized water tank 1, and further a cooler 21 is furnished to a pipeline 18 in the circulating pipeline 3, for supplying water to the anode side of the cell 2 from the tank 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing ozone water and a method for producing ozone water using the apparatus. More specifically, the present invention relates to an apparatus for producing ozone water by electrolyzing water and directly producing ozone water. The present invention relates to a manufacturing apparatus to be manufactured.

[0002]

2. Description of the Related Art
Typical methods for obtaining ozone water include a gas dissolving method in which high-concentration ozone gas generated from oxygen or air by discharge is diffused and dissolved in water to obtain ozone water, and ozone obtained by electrolyzing water is used. A water electrolysis method of directly dissolving in water is known.

[0003] Among them, the gas dissolving method requires a discharge-type ozonizer for producing high-concentration gas phase ozone, and the ozonizer itself is large. This type of ozonizer requires a high-frequency high-voltage power supply and requires a power supply device. Also becomes large, and furthermore, an oxygen cylinder or an oxygen generator as a raw material gas may be required, and the entire apparatus becomes extremely large.
In addition, since the handling is complicated, in recent years, the water power system has advantages that the device can be miniaturized, the raw material is easily available in water, the power source is several tens of volts and tens of amperes, and the power source device can be small. The solution is drawing attention.

[0004] However, even with the water electrolysis method having the above advantages, there is no practical ozone water production apparatus capable of stably producing high-concentration ozone water. A base ozone water producing apparatus has been proposed in, for example, JP-A-3-267390 and JP-A-8-134678.

[0005] The ozone water producing apparatus proposed in Japanese Patent Application Laid-Open No. 3-267390 discloses a method of suspending an electrolyzer main body, which is submerged in raw water injected into the water tank, from a control panel box mounted on the water tank with a hanging rod. , An electrode storage chamber is provided in the electrolytic device body,
An electrolytic cell in which an anode electrode having a predetermined aperture ratio is superposed on one surface of a solid polymer electrolyte membrane and a cathode electrode having a predetermined aperture ratio is laminated on the other surface in the electrode storage chamber is formed by dividing the electrode storage chamber into a cathode chamber and an anode. The end of the lead wire taken out of the electrolysis cell is connected to a DC power supply housed in a control panel box, and the electrolysis apparatus body has:
A raw material water inlet communicating with one end of the anode chamber, an ozone water outlet communicating the anode chamber with the other end through a water passage, a branch ozone water outlet branched from a middle of the water passage, and one end communicating with the cathode chamber. And a hydrogen outlet,
The electrolysis apparatus main body houses a pump at a position on the anode chamber side from the branch ozone water outlet of the water channel and a valve body for opening and closing the water channel at a portion on the ozone water outlet side from the branch ozone water outlet. More ozone water conduit,
A hydrogen conduit is erected from the hydrogen outlet, the tip of the ozone water conduit communicates with a water supply port provided in the control panel box, and the distal end of the hydrogen conduit communicates with a hydrogen treatment chamber housed in the control panel box. A drive shaft is set up from the pump, and a valve stem is set up from the valve body. The tip of the drive shaft is connected to a motor housed in the control box, and the tip of the valve shaft is connected to a solenoid housed in the control box. Further, a stirring blade was fitted in the middle of the drive shaft, and a measurement electrode having a predetermined aperture ratio was superimposed on the outer surface of the solid polymer electrolyte membrane near the stirring blade, and a comparative electrode was superimposed on the inner surface. The ozone concentration measuring instrument is disposed under water, and the lead wires taken out from the measuring electrode and the reference electrode of the ozone concentration measuring instrument are connected to an ozone concentration display device comprising an ammeter housed in a control panel box. It is an ozone water production device.

Since the above-mentioned ozone water producing apparatus has the above-described configuration, ozone water can be obtained easily in a compact manner, and an ozone concentration measuring tool is attached. The pump is switched between stirring the raw water and pumping it by opening and closing the water channel by raising and lowering the valve body.
Pump pumps, the number of parts of the hydrant can be reduced, and furthermore, gas-liquid contact can be efficiently performed because the gas phase ozone and the raw water are stirred by the pump, but there are advantages, but on the other hand,
Since the electrolysis device main body that houses the electrolysis cell, pump, and valve body is suspended in the ozone water by the hanging rod, there is a concern that the ozone water is contaminated by the immersion material such as the electrolyzing device main body and the hanging rod, and the electrolysis cell, Whenever a pump or valve breaks down or is inspected, it must be removed together with the control box that houses the motor that also serves as the lid of the water tank. There is a problem that said that labor is forced.

On the other hand, an ozone water producing apparatus proposed in Japanese Patent Application Laid-Open No. 8-134678 discloses an ozone water producing apparatus having an anode electrode made of a noble metal wire mesh having an ozone generation catalytic function on one surface of a solid electrolyte membrane and a cathode electrode made of a wire mesh on another surface. Respectively, an anode jacket covering the anode electrode and a cathode jacket covering the cathode electrode are provided on the anode electrode side and the cathode electrode side of the solid electrolyte membrane, and the anode jacket and the cathode jacket are provided with an electrolyte. The raw water in which the dissolved water flows in the anode jacket and the cathode jacket is provided with an inlet and an outlet, respectively, and a DC voltage is applied between the anode electrode and the cathode electrode. Ozone water production equipment.

Since the above-mentioned ozone water producing apparatus has the above configuration, ozone water can be obtained compactly and easily, and a noble metal wire mesh having an ozone generating catalytic function is used for an anode electrode for generating ozone. In the process of passing raw water from the inlet to the outlet, ozone can be efficiently generated and at the same time, the ozone can be effectively dissolved in the raw water to efficiently produce ozone water. It has such advantages. However, recently, the use of ozone water in the logistics field (such as transporting fresh fish etc. with quick-frozen ozone ice),
Medical field (sterilization and cleaning of operating rooms and equipment, etc.), Food-related (preservation of freshness of vegetables and fruits, kitchen room of schools, sterilization and cleaning of cooking utensils, etc.), Agriculture-related (bacterial adhering to seed surface Sterilization, etc.), wastewater treatment related (reduction of BOD / COD, decolorization, deodorization, etc.), etc., and the amount of use is considered to be large in a short time (for example, 50-100 l / min). In such a case, when the above-described ozone water producing apparatus is applied, a large-capacity power supply, a large electrolytic cell, and the like must be provided, but the use efficiency is poor and uneconomical.

SUMMARY OF THE INVENTION The present invention has been made on the basis of the above-mentioned background, and has as its object the purpose of using a relatively compact device so that repair and inspection of each device can be easily performed.
An object of the present invention is to provide an ozone water production apparatus capable of stably producing a large amount of ozone water and efficiently producing ozone water at a concentration suitable for use, and a method of producing ozone water using the apparatus.

[0010]

In order to achieve the above object, an ozone water producing apparatus according to the present invention comprises an electrolysis cell for electrolyzing water to generate ozone, and an electrolysis cell for storing ozone water outside an ozone water tank. And a water supply pipe to the ozone water tank, a water supply pipe to the tank, and a water supply pipe from the tank to the source of use. And an ozone water monitor for monitoring the ozone water concentration in the tank, and a cooling device is further provided in a water supply pipe of the water circulation pipe from the ozone water tank to the anode electrode side of the electrolytic cell. .

In the above configuration, since the electrolytic cell is disposed outside the ozone water tank via the circulation line, inspection and repair of the electrolytic cell and the circulation line can be easily performed. High concentration ozone water can be stored in the ozone water tank in accordance with the used capacity by the cell, so that it can be used in a large amount or in a small amount, and can be used economically and efficiently. In addition, since the ozone water tank is provided with an ozone water monitor for monitoring the concentration of ozone water in the tank, ozone water having a concentration suitable for the use can be stored in the tank, and can be applied to a wide range of applications. In addition, since a cooling device is provided in the water supply line of the circulation line from the ozone water tank to the anode side of the electrolytic cell, temperature-controlled circulating water can be supplied to the anode electrode of the electrolytic cell. Electrolysis can be performed, ozone can be generated stably, and decomposition can be suppressed and dissolved.

Further, in the above configuration, the water tank can be further provided with a closed structure and a pressure adjusting means can be provided, whereby the inside of the tank can be maintained in a pressurized state and the solubility of ozone can be increased. When the pressure adjusting means operates, the exhaust gas containing ozone is released to the atmosphere through the decomposition catalyst.

In the above construction, the water tank is provided with a liquid level gauge, and the water supply pipe and the water supply pipe are provided with solenoid valves, respectively. By connecting, it is possible to efficiently produce ozone water of a necessary concentration and amount according to the intended use, and to replenish ozone water each time it is used, and to stably produce and use ozone water.

Further, the method for producing ozone water according to the present invention comprises:
Since the ozone water production apparatus having the above configuration is used, the electrolytic cell and the ozone water tank are connected by a circulation pipe to circulate water to produce ozone water in the ozone water tank. Water can be produced, and particularly high-concentration ozone water can be produced easily.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram of an ozone water producing apparatus according to the present invention. In this figure, 1 is an ozone water tank, 2 is an electrolytic cell, and 3 is a circulation line.

The ozone water tank 1 has a stainless steel container coated with glass (such as stainless steel (SUS304, SUS316) or hard vinyl chloride, etc., besides glass) as an ozone-resistant water material. A water supply pipe 4 is provided on the upper part of the tank 1 and a water supply pipe 5 for use is provided on a lower side wall.
And an ozone water monitor 6 for monitoring the concentration of ozone water in the tank 1 and a liquid level gauge 7 for monitoring the amount of water in the tank 1 are provided below the side wall. 4a is an open / close valve attached to the water supply pipe 4, 4b is a water softener for removing calcium, magnesium and the like from the water supply, and 5a is a water supply pipe 5
, A reference numeral 5b denotes an original on-off valve, and reference numeral 6a denotes a pump for sucking ozone water into the ozone water monitor 6 and returning it to the ozone water tank 1.

The electrolytic cell 2 is basically the same as disclosed in Japanese Patent Application Laid-Open No. 8-134678.
As shown in FIG. 2, an anode electrode 9 made of a noble metal wire mesh having an ozone generation catalytic function is provided on one surface of a solid electrolyte membrane 8 and a wire mesh is provided on the other surface thereof, as shown in FIG. A cathode jacket 10 covering the anode 9 and a cathode jacket 12 covering the cathode 10 are provided on the anode 9 side and the cathode 10 side of the solid electrolyte membrane 8, respectively. Anode jacket 11 and cathode jacket 12
The raw material water in which the electrolyte is dissolved is the anode jacket
Inlet 11, 14 and outflow outlets 15, 16 are provided respectively so as to circulate inside 11 and inside cathode jacket 12, and anode electrode 9 and cathode electrode 10 are further connected to DC power supply 17. It is connected and controlled by the controller 17a.

The circulation line 3 is provided with a water supply line 18 for the electrolytic cell 2, which is provided between the lower part of the ozone water tank 1 and the inlet 13 of the anode electrode 9 of the electrolytic cell 2. A water supply line 19 to the ozone water tank 1 is provided between the upper portion and the outlet 15 of the anode electrode 9 of the electrolytic cell 2. A circulation pump 20 and a cooling device 21 are provided in the water supply line 18. Installed. Although the cathode electrode 10 side is not shown, a water supply pipe is provided at the inflow port 14 and a water supply pipe is provided at the outflow port 16, and raw water is supplied from the inflow port 14 to the outflow port 16. It is configured to:

The production of ozone water by the ozone water production apparatus having the above configuration is performed as follows. That is, the water supply pipe 4
The on-off valve 4a is opened to supply a predetermined amount of raw water to the ozone water tank 1. After supplying water, close the on-off valve 4a and set the circulation pump 20
To feed the raw water in the ozone water tank 1 to the water supply line 18,
While flowing through the water supply pipe line 19 on the anode electrode 9 side of the electrolytic cell 2, a DC current is applied to the electrolytic cell 2 and the cooling device 21
Activate At the same time, the raw water is also circulated from the water supply pipe 4 to the cathode electrode 10 via another pipe. Thereafter, the concentration of ozone water in the ozone water tank 1 increases due to the circulation, so that the ozone water monitor 6
Electrolysis is performed while monitoring the ozone water inside to a desired concentration of ozone water. Since ozone water is produced in this way,
High concentration ozone water (for example, 5p
pm to about 20 ppm) in the ozone water tank 1 according to the used capacity. And after this, the water pipe 5
Open / close valve 5a and use ozone water at the source.
When the amount of ozone water in the ozone water tank 1 is reduced to a predetermined amount by use, water supply from the water supply pipe 4 into the ozone water tank 1 and electrolysis are repeated.

Incidentally, when the ozone water was produced under the following conditions using the ozone water production apparatus having the basic configuration shown in FIG. 1, the concentration of ozone generated in the electrolytic cell was controlled to 8 mg / L, After a circulation time of 20 minutes, 20 L of high concentration ozone water of 20 mg / L or more could be produced. Manufacturing conditions Current density: 0.7 A / cm ² Circulating water volume: 1.0 L / min Ozone water tank capacity: 20 L Ozone water concentration meter: Ebara Jitsugyo Co., Ltd. (dissolved ozone concentration meter EL-360)

In addition to the above configuration, as shown in FIG. 3, the ozone water tank 1 is provided with a lid 22 to form a sealed structure, and the lid 22 is provided with an exhaust pipe 23 to the atmosphere, and the exhaust pipe 23 May be provided with a pressure regulating valve 24 and a decomposition catalyst 25. With this configuration, the inside of the ozone water tank 1 can be maintained in a pressurized state, and the solubility of ozone can be increased.

Further, the open / close valve 4 for the water supply pipe 4 and the water supply pipe 5 is provided.
Solenoid valves 26 and 27 are provided in place of a and 5a, respectively, and these solenoid valves 26 and 27, the liquid level gauge 7, and the ozone water monitor 6 are connected to the control device 17a of the electrolytic cell 2 so that they can be used for various purposes. In addition, the required concentration and amount of ozone water can be efficiently produced, and at the same time, ozone water can be replenished by replenishing raw water each time it is used, and stable production and use of ozone water can be achieved.

Further, the outer periphery of the ozone water tank 1, the water supply line 18 and the water supply line 19 of the circulation line 3 can be covered with a heat insulating material. By covering with the heat insulating material in this way, there is no exchange of heat with the outside, the cooling of the ozone water by the cooling device 21 can be effectively performed, and the solubility (concentration) of the ozone water can be improved.
Can be increased.

[0024]

As described above, the apparatus for producing ozone water according to the present invention can be configured as a relatively compact apparatus, and can easily repair and inspect each device.
In addition, a large amount of ozone water can be produced stably,
Ozone water can be efficiently produced at an ozone water concentration suitable for the intended use, and can be used effectively in a wide range of fields.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of an ozone water producing apparatus according to the present invention.

FIG. 2 is an explanatory diagram of an electrolytic cell according to the present invention.

FIG. 3 is a conceptual diagram of an ozone water producing apparatus according to another embodiment of the present invention.

[Explanation of symbols]

1: Ozone water tank 2: Electrolysis cell
3: Circulation line 4: Water supply line 5: Water supply line 4
a, 5a: On-off valve 6: Ozone water monitor 6a: Pump
7: Level gauge 8: Solid electrolyte membrane 9: Anode electrode 1
0: Cathode electrode 11: Anode jacket 12: Cathode jacket 1
3, 14: Inlet 15, 16: Outlet 17: DC power supply 17
a: Control device 18: Water supply line 19: Water supply line 2
0: Circulation pump 21: Cooling device 22: Lid 2
3: Exhaust pipe 24: Pressure regulating valve 25: Decomposition catalyst 2
6, 27: Solenoid valve

Claims (5)

[Claims] 1. An electrolysis cell for electrolyzing water to generate ozone water, a water circulation pipe provided between an anode electrode side of the electrolysis cell and the ozone water tank outside an ozone water tank for storing ozone water. The ozone water tank is provided with a water supply pipe to the tank, a water supply pipe from the tank to the user, and an ozone water monitor for monitoring the concentration of ozone water in the tank. An ozone water producing apparatus characterized in that a cooling device is provided in a water supply line of a pipe from the ozone water tank to the anode electrode side of the electrolytic cell. 2. The ozone water producing apparatus according to claim 1, wherein the water tank has a closed structure and is provided with a pressure adjusting means. 3. The apparatus for producing ozone water according to claim 1, wherein the ozone water monitor is connected to a control device of the electrolytic cell to control the concentration of ozone water in the water tank. 4. A liquid level gauge is provided in a water tank, and a solenoid valve is provided in each of a water supply pipe and a water supply pipe, and the liquid level gauge and the solenoid valve are connected to a control device of the electrolytic cell. The ozone water producing apparatus according to the above. 5. A method for producing ozone water, comprising producing ozone water having a desired concentration in an ozone water tank using the ozone water production apparatus according to claim 1.