JP2000073193A - Ozonized water forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form high-concn. ozonized water. SOLUTION: This ozonized water forming device is constituted by holding a cation exchange resin layer 14 with an anode 12 and a cathode 13, housing this layer into an electrolytic cell 10, supplying water into this electrolytic cell 10, impressing DC voltage between the anode 12 and the cathode 13, forming the ozonized water in the electrolytic cell 10 and introducing this ozonized water to the outside of the electrolytic cell 10. This device is provided with a supply device (an acetic acid soln. supply device 40) for supplying and mixing the water in which ozone is easily soluble into the ozonized water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrolytic ozone water generator for generating ozone water by electrolyzing water.

[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 contains a cation exchange resin layer in an electrolytic cell sandwiched between an anode and a cathode, and supplies water into the electrolytic cell. A DC voltage is applied between the anode and the cathode to generate ozone water in the electrolytic cell, and the ozone water is led out of the electrolytic cell.

[0003]

In the ozone water generator disclosed in the above-mentioned publication, ozone generated by electrolysis is dissolved in water to generate ozone water. Therefore, there is a lot of ozone in a gaseous state that does not dissolve in water or ozone that has been dissolved in water but returns to a gaseous state, so that high-concentration ozone water is not generated.

[0004]

SUMMARY OF THE INVENTION The present invention has been made by paying attention to the property of ozone that water having a lower pH value or water having a lower temperature has a higher ozone solubility.
The cation exchange resin layer is housed in an electrolytic cell sandwiched between an anode and a cathode, and water is supplied into the electrolytic cell, and a DC voltage is applied between the anode and the cathode, and ozone water is applied in the electrolytic cell. And supplying the ozone water with an ozone-soluble water such as an acidic solution (for example, an acetic acid solution) or cold water, wherein the ozone water is supplied to the ozone water generator. The feature is that the device is provided. In this case, it is preferable that the cation exchange resin layer has a diaphragm function of partitioning the inside of the electrolytic cell into an anode chamber in which the anode is accommodated and a cathode chamber in which the cathode is accommodated.

[0005]

In the ozone water generating apparatus according to the present invention, the ozone water can be supplied and mixed with water in which ozone is easily dissolved, such as an acidic solution or cold water, from the supply device. Water can be easily dissolved, the ozone can be dissolved in water at a high concentration by utilizing the properties of ozone, and ozone water having a higher concentration can be obtained as compared with a conventional ozone water generator. .

In addition, an acidic solution is used as water in which ozone is easily dissolved, and a cation exchange resin layer has a diaphragm function of partitioning the inside of an electrolytic cell into an anode chamber containing an anode and a cathode chamber containing a cathode. When the ozone water is used, ozone water is generated in the anode chamber and the ozone water is made weakly acidic, so that it is necessary to adjust the pH value of the ozone water to a predetermined weak acidity. The consumption of the acidic solution can be reduced, and the running cost can be reduced. In this case, when the ozone water is generated by electrolyzing the desalinated water, the desalinated water should be supplied to the anode chamber and the tap water should be supplied to the cathode chamber. Therefore, the consumption of the desalted water can be reduced, and the running cost can be reduced.

[0007]

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 ozone water generation apparatus according to the present invention.
0, a DC power supply 20, supply pipes 31 and 32 and outlet pipes 33 and 34 connected to the electrolytic cell 10, and an acetic acid solution supply device 40.

The electrolytic cell 10 includes a cell main body 11 into which water is supplied, an anode 12 and a cathode 13 disposed opposite to each other in the cell main body 11, and an anode in which the anode 12 is accommodated in the cell main body 11. A cation exchange membrane 14 partitioned into a chamber R1 and a cathode chamber R2 in which the cathode 13 is accommodated, and supply ports 11a and 11b opened toward the anode chamber R1 in the tank body 11.
And a supply port 11c opening toward the cathode chamber R2 is provided at the upper portion, and a discharge port 11d opening toward the anode chamber R1 and a discharge port 11e opening toward the cathode chamber R2 are provided at the lower portion. Have been.

The anode 12 and the cathode 13 are made of porous platinum-plated titanium. The anode 12 is connected to the anode terminal of the DC power supply 20, and the cathode 13 is connected to the cathode terminal of the DC power supply 20. ing. Cation exchange membrane 14
Is a membrane having a diaphragm function for partitioning the inside of the tank body 11 into an anode chamber R1 and a cathode chamber R2, and the anode 12 and the cathode 13
It is arranged in between. In addition, a passage P1 from the supply port 11b to the outlet port 11d and the supply port 1 are provided in the anode chamber R1.
Partition wall 1 that partitions passage P2 from 1a to outlet 11d
5 is provided downward from the upper part of the tank main body 11, and communicates with each other through a lower communication path 16.

The supply pipe 31 is connected to the supply port 11 b of the tank body 11.
And desalinated water (eg, water from which tap water has been dechlorinated with a pure water purifier, or water that has been distilled)
Is supplied to the passage P1 of the anode chamber R1.
The supply pipe 32 is connected to the supply port 11c of the tank body 11, and supplies tap water to the cathode chamber R2. The outlet pipe 33 is connected to the outlet 11d of the tank body 11, and guides the ozone water generated in the anode chamber R1 to the outside of the electrolytic tank 10. The outlet pipe 34 is connected to the outlet 11 e of the tank body 11, and guides water in the cathode chamber R <b> 2 to the outside of the electrolytic cell 10.

An acetic acid solution supply device 40 includes an acetic acid solution tank 41 for storing an acetic acid solution,
And the other end is connected to the supply port 11a of the tank body 11.
And a supply means (not shown, for example, a pump or a valve) whose operation is controlled based on a detection signal from a pH sensor (not shown) for detecting the pH value of the ozone water flowing through the outlet pipe 33. The acetic acid in the acetic acid solution tank 41 is supplied to the passage P2 of the anode chamber R1 through the supply pipe 42 and the supply port 11a by the operation of the supply means, so that the ozone water flowing through the outlet pipe 33 is formed. The pH value is adjusted to a predetermined weak acidity.

In this embodiment constructed as described above, the operation of the DC power supply 20 causes the anode 12 and the cathode 1 to operate.
When a DC voltage is applied between the three, the desalinated water is supplied to the passage P1 of the anode chamber R1 through the supply pipe 31, and the tap water is supplied to the cathode chamber R2 through the supply pipe 32.
Electrolysis is performed between the two electrodes 12 and 13 to form an anode chamber R1.
The near-neutral weakly acidic ozone water is generated in the passage P1, and the generated ozone water flows downward through the passage P1 to reach the communication passage 16 and is led out from the outlet pipe 33. At this time, the acetic acid solution is supplied to the passage P2 from the acetic acid solution tank 41 through the supply pipe 42 based on the detection signal from the pH sensor, and the acetic acid solution is mixed with the ozone water in the communication passage 16.

Since the pH value of the ozone water generated in the passage P1 of the anode chamber R1 is relatively high and nearly neutral, a part of the ozone dissolved in the ozone water becomes gas. However, the ozone water which has reached the communication path 16 is mixed with the acetic acid solution supplied from the acetic acid solution tank 41 through the supply pipe 42 in the communication path 16 and its pH value becomes a predetermined weak acidity (for example, about pH 4). Adjusted. For this reason,
In the ozone water that has reached the communication passage 16, the water having a lower pH value has a higher solubility of ozone, so that the ozone water has a higher solubility.
Ozone in a gaseous state can be efficiently dissolved in ozone water, and ozone water having a higher concentration can be obtained as compared with a conventional ozone water generator.

In this embodiment, the tank body 11
Since the cation exchange membrane 14 having a diaphragm function of partitioning the inside into an anode chamber R1 and a cathode chamber R2 is adopted, the anode chamber R
In step 1, ozone water is generated, and the ozone water is made weakly acidic. Therefore, the consumption of the acetic acid solution required for adjusting the pH value of the ozone water to a predetermined weak acidity can be reduced, and the running cost can be suppressed. In addition, since the water in the anode chamber R1 and the water in the cathode chamber R2 do not mix with each other, the desalinated water is supplied to the anode chamber R1.
Since tap water can be supplied to the cathode chamber R2, the consumption of the desalted water can be reduced, and the running cost can be reduced.

In the above-described embodiment, the supply pipe 42 of the acetic acid solution supply device 40 is connected to the supply port 11a of the tank body 11, the acetic acid solution is supplied to the passage P2 of the anode chamber R1, and the ozone Although the water and the acetic acid solution are mixed, the supply pipe 42 may be connected to a location where the acetic acid solution can be supplied to and mixed with the ozone water. For example, as shown in FIG. , The acetic acid solution is supplied to the outlet pipe 33, and the ozone water and the acetic acid solution are mixed in the outlet pipe 33.
In this case, the supply port 11a and the partition 15 need not be provided.

In the above embodiment, the acetic acid solution is supplied and mixed with the ozone water to adjust the pH value of the ozone water to a predetermined weak acidity. Even when the solution is supplied to and mixed with ozone water and the pH value of the ozone water is adjusted to a predetermined weak acidity, the same operation and effect as in the above embodiment can be obtained. Also, ozone can be dissolved in cold water at a high concentration,
It is also possible to carry out by supplying and mixing cold water instead of the acetic acid solution of the above embodiment.

In the above embodiment, the cation exchange resin layer 14 is a cation exchange resin layer having a diaphragm function for partitioning the inside of the tank body 11 into an anode chamber R1 and a cathode chamber R2.
However, it is also possible to employ a cation exchange resin layer having no diaphragm function, and in this case,
What is necessary is just to implement without providing the supply pipe 32 and the outlet pipe 34.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram schematically showing an embodiment of an ozone water generating apparatus according to the present invention.

FIG. 2 is an overall configuration diagram schematically showing a modified embodiment of the ozone water generating apparatus according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Electrolysis tank, 12 ... Anode, 13 ... Cathode, 14 ... Cation exchange membrane, 20 ... DC power supply, 31, 32 ... Supply pipe,
33, 34 ... outlet tube, 40 ... acetic acid solution supply device (supply device), 41 ... acetic acid solution tank, 42 ... supply tube, R1 ... anode room, R2 ... cathode room.

Claims (3)

[Claims] A cation exchange resin layer is accommodated in an electrolytic cell sandwiched between an anode and a cathode, water is supplied into the electrolytic cell, and a DC voltage is applied between the anode and the cathode to form the electrolytic cell. In the ozone water generating apparatus which generates ozone water inside and the same ozone water is led out of the electrolytic cell,
An ozone water generation device, further comprising a supply device for supplying and mixing water in which ozone is easily dissolved in the ozone water. 2. The ozone water generator according to claim 1, wherein an acidic solution is used as the water in which the ozone is easily dissolved. 3. The cation exchange resin layer has a diaphragm function of partitioning the inside of the electrolytic cell into an anode chamber containing the anode and a cathode chamber containing the cathode. The ozone water generation device according to claim 2.