JP5791841B1 - Ozone water production equipment - Google Patents

Abstract

An object of the present invention is to provide an ozone water production apparatus that does not require waste water treatment to be drained from the cathode electrode side to the outside of the apparatus, and that can reduce the size and life of the apparatus. An ozone water production apparatus comprising an anode electrode, a cathode electrode, and a cation exchange membrane, provided on the anode electrode side, an anode side supply pipe for supplying raw water to the anode electrode, and an anode electrode An ozone water discharge pipe for discharging ozone water produced by supplying raw material water, a cathode side supply means for supplying a part of the raw water flowing in the anode side supply pipe to the cathode electrode, and the cathode electrode side And a loop-shaped pipe for discharging the raw water supplied by the cathode-side supply means and supplying it again to the cathode electrode. When the raw water is supplied from the anode side supply pipe to the cathode electrode by the cathode side supply means, and the pressure in the looped pipe becomes higher than the pressure in the anode side supply pipe after a predetermined time has elapsed, the cathode side supply means The supply of raw material water to the cathode electrode is stopped. [Selection] Figure 1

Description

  The present invention relates to an ozone water production apparatus, and more particularly to an ozone water production apparatus that does not require drainage treatment from the cathode electrode side to the outside of the apparatus, and that can reduce the size and life of the apparatus.

In recent years, ozone water has been widely used for applications such as sterilization of foods and deodorization of malodorous gases, and many examples of knowledge have begun to be published in the fields of medical care and nursing care. Also in the semiconductor manufacturing area, the feature of ozone oxidation with respect to the ultrafine structure is recognized, and the use of ozone water is essential.
As a manufacturing method of such ozone water, the manufacturing method of ozone water that is currently widely used for industrial use is roughly divided into a gas dissolution method that generates ozone gas by discharging oxygen gas and dissolves the generated ozone gas in water. Electrolytic gas dissolution method in which ozone gas is generated by electrolysis of oxygen gas and the generated ozone gas is dissolved in water, and raw water is brought into direct contact with a catalyst electrode in which an anode electrode and a cathode electrode are provided on both sides of a cation exchange membrane. At the same time, three direct electrolysis methods in which a direct current voltage is applied between the anode electrode and the cathode electrode to generate ozone water have been put into practical use.

Specifically, the discharge-type gas dissolution method supplies oxygen to the discharge tube, and when oxygen passes through the discharge tube, countless discharges are generated by applying a high-frequency high voltage to the discharge tube, generating ozone gas. Therefore, this ozone gas is mixed with raw water (pure water, tap water, etc.) to generate ozone water (see, for example, Patent Document 1).
Specifically, the direct electrolysis method is such that the anode is pressed into contact with one surface of the cation exchange membrane, and the raw material water is brought into direct contact with the electrolytic surface of the catalyst electrode in which the cathode electrode is pressed into contact with the other surface. In this method, ozone water is generated by electrolysis of water (see Patent Document 2).

For example, as shown in FIG. 4, in the direct electrolysis method, the raw material water supplied to the cathode electrode 23C is usually drained out of the apparatus as it is from the cathode electrode 23C side through the cathode side drain pipe 34C.
Alternatively, when high-concentration salt water is supplied to the cathode electrode in order to obtain high-concentration ozone water, for example, as shown in FIG. 5, the salt water supplied to the cathode electrode 23D is on the cathode electrode 23D side. Then, the water is again supplied to the cathode electrode 23D for circulation by a circulation mechanism (pump, salt water tank 35D, etc.) provided on the cathode electrode 23D side. 4 and 5, the same reference numerals as those in FIG. 1 to be described later are given the same numerals with “C” or “D”.

However, the apparatus 100C of the type shown in FIG. 4 has a problem that the amount of drainage drained from the cathode electrode side to the outside of the apparatus becomes large, so that the wastewater treatment is very difficult and the cost is high.
On the other hand, the apparatus 100D of the type shown in FIG. 5 does not require wastewater treatment outside the apparatus, but requires a pump, a tank, etc., which increases the size of the apparatus and causes the pump to easily break down. In addition, there is a problem that the life of the apparatus is shortened.

Japanese Patent No. 4256453 JP-A-8-134678

  The present invention has been made in view of the above problems, and an ozone water production apparatus that does not require waste water treatment from the cathode electrode side to the outside of the apparatus and that can reduce the size and extend the life of the apparatus. Is to provide.

In order to solve the above-mentioned problems, the present inventor provided a cathode-side supply means for supplying a part of the raw material water flowing in the anode-side supply pipe to the cathode electrode in the process of examining the cause of the above-mentioned problem, Eliminates wastewater treatment from the cathode electrode side to the outside of the device by providing a loop-shaped pipe on the cathode electrode side or by providing a cathode side connecting pipe that connects the cathode electrode side of the casing and the raw water supply source Thus, the present inventors have found that the apparatus can be reduced in size and extended in life, and the present invention has been achieved.
That is, the said subject which concerns on this invention is solved by the following means.

1. A catalyst electrode having a cation exchange membrane provided between an anode electrode and a cathode electrode in a casing is provided, and raw water is supplied to the anode electrode and the cathode electrode, and the anode electrode and the cathode electrode An ozone water production apparatus for producing ozone water by applying a direct current voltage between,
Raw water supply source for supplying raw water,
An anode-side supply pipe for connecting the raw water supply source and the anode electrode side of the casing, and supplying raw water from the raw water supply source to the anode electrode;
An ozone water discharge pipe that is provided on the anode electrode side of the casing and discharges ozone water produced by supplying raw water to the anode electrode;
A cathode-side supply means in which a part of the raw material water flowing in the anode-side supply pipe is supplied to the cathode electrode;
A loop-shaped pipe provided on the cathode electrode side of the casing, for discharging the raw water supplied to the cathode electrode by the cathode-side supply means, and again supplying the cathode electrode,
When raw water is supplied from the anode side supply pipe to the cathode electrode by the cathode side supply means, and the pressure in the loop-shaped pipe becomes higher than the pressure in the anode side supply pipe after a predetermined time has elapsed, The ozone water production apparatus, wherein the supply of raw material water to the cathode electrode by the cathode side supply means is stopped.

  2. 2. The ozone according to claim 1, wherein the cathode-side supply means is a hole formed in the cation exchange membrane and allowing raw water supplied to the anode electrode to pass to the cathode electrode side. Water production equipment.

  3. The apparatus for producing ozone water according to claim 2, wherein oxygen gas generated on the anode electrode side is supplied to the cathode electrode together with the raw water through the hole.

  4). The diameter of the said hole part exists in the range of 0.5-10 mm, The ozone water manufacturing apparatus of Claim 2 or 3 characterized by the above-mentioned.

  5. The ozone water production apparatus according to claim 1, wherein the cathode side supply means is a cathode side supply pipe branched from the anode side supply pipe and connected to the loop-shaped pipe.

6). A catalyst electrode having a cation exchange membrane provided between an anode electrode and a cathode electrode in a casing is provided, and raw water is supplied to the anode electrode and the cathode electrode, and the anode electrode and the cathode electrode An ozone water production apparatus for producing ozone water by applying a direct current voltage between,
Raw water supply source for supplying raw water,
An anode-side supply pipe for connecting the raw water supply source and the anode electrode side of the casing, and supplying raw water from the raw water supply source to the anode electrode;
An ozone water discharge pipe that is provided on the anode electrode side of the casing and discharges ozone water produced by supplying raw water to the anode electrode;
A cathode-side supply means in which a part of the raw material water flowing in the anode-side supply pipe is supplied to the cathode electrode;
Connecting the cathode electrode side of the casing and the raw water supply source, and after discharging the raw water supplied to the cathode electrode by the negative electrode side supply means, a cathode side connection pipe returning to the raw water supply source; With
Raw material water is supplied from the anode side supply pipe to the cathode electrode by the cathode side supply means, and when the pressure in the cathode side connection pipe becomes higher than the pressure in the anode side supply pipe after a predetermined time has elapsed, The ozone water production apparatus, wherein the supply of raw material water to the cathode electrode by the cathode side supply means is stopped.

  7). The ozone according to claim 6, wherein the cathode side supply means is a hole formed in the cation exchange membrane and allowing the raw water supplied to the anode electrode to pass to the cathode electrode side. Water production equipment.

  8). The ozone water production apparatus according to claim 7, wherein oxygen gas generated on the anode electrode side is supplied to the cathode electrode together with the raw water through the hole.

  9. The diameter of the said hole part exists in the range of 0.5-10 mm, The ozone water manufacturing apparatus of Claim 7 or 8 characterized by the above-mentioned.

By the above means of the present invention, it is possible to provide an ozone water production apparatus that does not require drainage treatment for draining from the cathode electrode side to the outside of the apparatus and that can reduce the size and life of the apparatus.
The expression mechanism or action mechanism of the effect of the present invention is not clear, but is presumed as follows.
Raw material water is supplied from the anode side supply pipe to the cathode electrode by the cathode side supply means, and when the pressure in the loop-shaped pipe becomes higher than the pressure in the anode side supply pipe after a predetermined time has elapsed, or the cathode When the pressure in the side connection pipe becomes higher than the pressure in the anode side supply pipe, the supply of raw material water to the cathode electrode by the cathode side supply means is stopped. At this time, the cathode electrode and the loop-shaped pipe, or the cathode electrode and the cathode side connecting pipe are filled with the raw material water, while the anode water is supplied to the anode electrode at any time. Will continue. As described above, the cathode electrode and the loop-shaped pipe, or the cathode electrode and the cathode side connection pipe are filled with the raw material water, so that ozone water can be generated without discharging from the cathode electrode side to the outside of the apparatus. it can. Therefore, wastewater treatment is unnecessary, and the apparatus can be reduced in size and extended in life.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view schematically showing an outline of an ozone water production apparatus according to a first embodiment. The 2nd Embodiment was shown and it is the sectional side view which showed the outline of the ozone water manufacturing apparatus typically. It is a side sectional view showing a 3rd embodiment and showing an outline of an ozone water production device typically. It is the sectional side view which showed the example of the prior art, and showed the outline of the ozone water manufacturing apparatus typically. It is the sectional side view which showed the example of the prior art, and showed the outline of the ozone water manufacturing apparatus typically.

The ozone water production apparatus of the present invention includes a catalyst electrode in which a cation exchange membrane is provided between an anode electrode and a cathode electrode in a casing, and supplies raw water to the anode electrode and the cathode electrode, An ozone water production apparatus for producing ozone water by applying a DC voltage between the anode electrode and the cathode electrode, the raw water supply source for supplying raw water, the raw water supply source, An anode side supply pipe that connects the anode electrode side of the casing and supplies the source water from the source water supply source to the anode electrode, and is provided on the anode electrode side of the casing, and the source water is supplied to the anode electrode. An ozone water discharge pipe for discharging ozone water produced by being supplied, a cathode side supply means for supplying a part of the raw material water flowing in the anode side supply pipe to the cathode electrode, and a cathode of the casing A loop-shaped pipe that is provided on the pole side, discharges the raw water supplied to the cathode electrode by the cathode-side supply means, and supplies the cathode water to the cathode electrode again, from the anode-side supply pipe to the cathode When the raw water is supplied to the cathode electrode by the side supply means and the pressure in the loop-shaped pipe becomes higher than the pressure in the anode side supply pipe after a predetermined time has elapsed, the cathode by the cathode side supply means The supply of the raw material water to the electrode is stopped.
This feature is a technical feature common to the inventions according to claims 1 to 9.

  As an embodiment of the present invention, from the viewpoint of manifesting the effects of the present invention, the cathode side supply means is formed on the cation exchange membrane and passes raw water supplied to the anode electrode to the cathode electrode side. It is preferable that it is a hole to be made. By forming a hole in the cation exchange membrane, raw water can be easily supplied from the anode electrode side to the cathode electrode side without providing piping or the like, and the apparatus can be downsized.

Further, since the oxygen gas generated on the anode electrode side is supplied to the cathode electrode together with the raw water through the hole, the hydrogen gas generated on the cathode electrode side is supplied with oxygen supplied from the hole. Return to water (H ₂ O) by gas. Therefore, ozone water can be generated with high efficiency without hindering the electric reaction by hydrogen gas.

  Moreover, it is preferable that the diameter of the hole is in the range of 0.5 to 10 mm in that the raw material water can efficiently supply oxygen gas to the cathode electrode side.

  Moreover, it is preferable that the cathode side supply means is a cathode side supply pipe branched from the anode side supply pipe and connected to the loop-shaped pipe from the viewpoint that the hole processing of the cation exchange membrane is not required.

  Another ozone water production apparatus of the present invention includes a catalyst electrode in which a cation exchange membrane is provided between an anode electrode and a cathode electrode in a casing, and supplies raw water to the anode electrode and the cathode electrode. And an ozone water production apparatus for producing ozone water by applying a DC voltage between the anode electrode and the cathode electrode, the raw water supply source for supplying raw water, and the raw water supply source Are connected to the anode electrode side of the casing, the anode side supply pipe for supplying raw water from the raw water supply source to the anode electrode, the anode electrode side of the casing, and the anode electrode An ozone water discharge pipe for discharging ozone water produced by supplying raw material water, a cathode side supply means for supplying a part of the raw material water flowing in the anode side supply pipe to a cathode electrode, and the casein A cathode-side connecting pipe that connects the cathode electrode side of the cathode electrode and the source water supply source, discharges the source water supplied to the cathode electrode by the cathode side supply means, and then returns the source water to the source water supply source. The raw material water is supplied from the anode side supply pipe to the cathode electrode by the cathode side supply means, and the pressure in the cathode side connection pipe becomes higher than the pressure in the anode side supply pipe after a predetermined time has elapsed. The supply of raw material water to the cathode electrode by the cathode side supply means is stopped.

  Hereinafter, the present invention, its components, and modes and modes for carrying out the present invention will be described in detail. In addition, in this application, "-" is used in the meaning which includes the numerical value described before and behind that as a lower limit and an upper limit.

[First Embodiment]
FIG. 1 is a side sectional view schematically showing an outline of the ozone water production apparatus of the present invention.
The ozone water production apparatus 100 is configured by arranging a catalyst electrode 2 in a casing 1 to which raw water is supplied.
The catalyst electrode 2 includes a cation exchange membrane 21, an anode electrode 22 that is in pressure contact with one surface of the cation exchange membrane 21, and a cathode electrode 23 that is in pressure contact with the other surface. An apparatus that generates ozone water by applying a DC voltage between the anode electrode 22 and the cathode electrode 23 of the catalyst electrode 2 to generate ozone gas on the anode electrode 22 side and dissolving the ozone gas in raw material water. The present invention is a direct electrolysis type ozone water production apparatus.

The casing 1 is composed of a first housing 13 and a second housing 14 that are arranged to face each other.
The first casing 13 and the second casing 14 have a plate shape, and recesses 131 and 141 are formed on opposing surfaces facing each other. The housing chamber 3 is formed by making the concave portions 131 and 141 of the first housing 13 and the second housing 14 face each other. A catalyst electrode 2 is accommodated in the accommodating chamber 3.

An anode side supply channel 11 a for supplying raw material water to the anode electrode 22 in the storage chamber 3 is formed at the lower end of the first housing 13, and the anode electrode is formed at the upper end of the first housing 13. An anode side discharge passage 12a for discharging the ozone water generated in 22 is formed.
An anode side supply pipe 31 is connected to the anode side supply flow path 11a, and an anode side discharge pipe 32 is connected to the anode side discharge flow path 12a.
On the other hand, the raw material water supplied to the cathode electrode 23 in the storage chamber 3 is discharged to the lower end portion of the second housing 14 through a hole portion 5 (cathode side supply means) of the cation exchange membrane 21 described later. The cathode side discharge flow path 12b is formed, and the raw water discharged from the cathode side discharge flow path 12b is supplied to the cathode electrode 23 in the storage chamber 3 at the upper end of the second housing 14 again. For this purpose, a cathode-side supply channel 11b is formed.
The cathode side discharge channel 12b and the cathode side supply channel 11b are connected by a loop-shaped pipe 40.

A cation exchange membrane 21 is sandwiched between the opposing surfaces of the first housing 13 and the second housing 14. That is, the outer periphery of the cation exchange membrane 21 is held and fixed by the first housing 13 and the second housing 14.
An anode electrode 22 is provided on the surface of the cation exchange membrane 21 on the first housing 13 side, and a cathode electrode 23 is provided on the surface of the second housing 14 side. Further, the holding plate 15 is disposed on the surface of the anode electrode 22 opposite to the cation exchange membrane 21, and the holding plate 16 is disposed on the surface of the cathode electrode 23 opposite to the cation exchange membrane 21. Yes. The holding plate 15 is fitted in the recess 131 of the first housing 13, and the holding plate 16 is fitted in the recess 141 of the second housing 14.
The anode electrode 22, the cathode electrode 23, and the cation exchange membrane 21 are appropriately pressed by the holding plate 15 fitted in the first housing 13 and the holding plate 16 fitted in the second housing 14. .
In this way, the interior of the storage chamber 3 is divided into the anode electrode 22 side and the cathode electrode 23 side by the cation exchange membrane 21.

The cation exchange membrane 21 according to the present invention is characterized in that a hole portion 5 through which the raw material water supplied to the anode electrode 22 passes to the cathode electrode 23 side is formed.
The hole 5 is preferably formed in the range of 0.5 to 10 mm in diameter, and more preferably in the range of 0.5 to 1.0 mm. In addition, the shape of the hole 5 is preferably, for example, a circle in terms of easy processing.
The hole 5 is formed in the vicinity of the anode-side supply channel 11a and the cathode-side discharge channel 12b in the cation exchange membrane 21, that is, in the lower end portion of the cation-exchange membrane 21 in FIG. However, it is preferable in that the raw water can be efficiently supplied to the cathode electrode 23 side. Furthermore, it is preferable that a plurality of the holes 5 are formed in the cation exchange membrane 21 in terms of increasing the amount of raw material water supplied to the cathode electrode 23 side.
Note that the raw water does not pass from the anode electrode 22 side to the cathode electrode 23 side from locations other than the hole 5, and the raw water and ozone water are not supplied from the first casing 13 and the second casing 14. It is sealed so that it does not leak to the outside from between the facing surfaces.

The raw material water is supplied from the anode side supply pipe 31 to the anode electrode 22 via the anode side supply channel 11a, and a water flow is generated from the anode side supply channel 11a to the anode side discharge channel 12a. In addition, the water is supplied to the cathode electrode 23 through the hole 5, and a water flow is again generated from the cathode side discharge channel 12 b to the cathode electrode 23 through the loop-shaped pipe 40 to the cathode electrode 23. Yes.
That is, the raw material water supplied from the anode-side supply channel 11a continuously contacts the anode electrode 22 in the storage chamber 3, and the raw water supplied to the cathode electrode 23 side through the hole 5 is The cathode electrode 23 is continuously contacted via the loop-shaped pipe 40.

Next, the catalyst electrode 2 will be described in detail.
As the cation exchange membrane 21, a conventionally known one can be used, and a fluorine-based cation exchange membrane having a high durability against the generated ozone can be used. For example, the thickness is in the range of 100 to 300 μm. preferable.
The cation exchange membrane 21 is characterized in that the hole 5 as described above is formed.

As the anode electrode 22, a material having an ozone generation catalyst function is used. Specifically, in terms of stability, it is preferable to use platinum, gold, or a coating metal thereof, and in particular, the use of a metal in which platinum is coated on titanium can reduce the manufacturing cost at a low cost. Is preferable. Moreover, you may use what formed the silicon film into the silicon wafer.
The diamond film can be formed by, for example, a plasma CVD method or a thermal fermentation CVD method.
Further, the anode electrode 22 is not in close contact with the cation exchange membrane 21 so as to completely cover it, but has a large number of through holes so that the cation exchange membrane 21 has a contact portion and a non-contact portion. Are preferably stacked. That is, it is preferable that the anode electrode 22 has a grating shape or a punching metal shape. FIG. 1 shows a case where the anode electrode 22 has a grating shape. Specifically, the grating shape is a lattice shape in which wires are welded, and the punching metal shape is a porous plate shape in which a large number of through holes are formed in a metal plate.

  By forming the grating-like anode electrode 22 in this way, the intersections of the members constituting the anode electrode 22 are pointed and protrude to the outer surface, and contact with the water flow to generate a vortex flow. Can be dissolved to accelerate dissolution.

As the cathode electrode 23, a metal having an ozone generation catalyst function is used. Specifically, it is preferable to use platinum, gold, or a coated metal thereof from the viewpoint of good stability. In particular, when a metal obtained by coating platinum on titanium is used, the manufacturing cost can be reduced. Moreover, you may use what formed the diamond film on the silicon wafer.
Diamond film formation can be performed by plasma CVD method or thermal fermentation CVD method as described above.
The cathode electrode 23 is also preferably formed in a grating shape like the anode electrode 22. In particular, the cathode electrode portion 23 is preferably formed so as to have a coarser mesh than the anode electrode 22.

The cation exchange membrane 21, the anode electrode 22, and the cathode electrode 23 described above are formed into a flat plate shape as the catalyst electrode 2. The catalyst electrode 2 is held in pressure contact with holding plates 15 and 16 in the casing 1.
Further, the output terminal of the power supply device 80 is electrically connected between the anode electrode 22 and the cathode electrode 23 so that a DC voltage is applied. In other words, the anode electrode 22 and the cathode electrode 23 are connected to the power supply device 80 via the conductive wires 24 to the electrodes 22 and 23. The DC voltage to be applied is preferably in the range of 6 to 15 volts, for example.

The upstream end of the anode side supply pipe 31 is connected to the raw material water supply source 60.
Examples of the raw water supply source 60 include a tank in which raw water is stored and a small pump having a low discharge pressure connected to the tank. As raw water, tap water, pure water, RO water, or the like can be used.
In the present invention, pure water means that having a conductivity in the range of 0.5 to 5 μS / cm, and RO water means that in which the conductivity is about 3 to 8 μS / cm.

  In addition, although not shown, the anode side discharge pipe 32 and the anode side supply pipe 31 may be connected by piping to be circulated in a loop shape. In this way, the pipe can be washed with ozone water.

A concentration detection sensor 90 that detects the concentration of ozone water generated on the anode electrode 22 side is provided on the downstream side of the anode side discharge pipe 32.
When the anode-side discharge pipe 32 and the anode-side supply pipe 31 are connected by piping as described above to form a loop, the anode-side supply pipe is not limited to the position immediately downstream of the anode-side discharge pipe 32. It may be provided at a position immediately upstream of 31, may be provided in any of the loop-shaped pipes, and may be provided in a plurality of places.

The concentration detection sensor 90 includes a detection electrode (not shown), a comparison electrode (not shown), and an ammeter (not shown) that measures the current value by connecting to one end of the detection electrode and the comparison electrode. It is configured. The concentration detection sensor 90 is a galvanic concentration detection sensor that obtains a current value corresponding to the ozone concentration of ozone water from an electromotive force generated by immersing the comparison electrode and the detection electrode in ozone water.
The ammeter is electrically connected to the control unit 70 of the ozone water production apparatus 100, and an output value measured by the ammeter is output to the control unit 70.
As the detection electrode, it is preferable to use, for example, an electrode made of platinum or gold, and as the comparison electrode, silver or silver chloride is used.
Such a detection electrode and a comparison electrode are in contact with ozone water flowing through the anode side discharge pipe 32. Then, when the detection electrode and the comparison electrode are in contact with the ozone water, the current value due to the ozone concentration change of the detection electrode is detected and the concentration is measured.

  The control unit 70 controls the amount of power of the power supply device 80 so that the concentration measured by the concentration detection sensor 90 matches the preset concentration.

Next, a method for generating ozone water using the ozone water manufacturing apparatus 100 having the above-described configuration will be described.
First, raw water is supplied from the raw water supply source 60 to the anode-side supply pipe 31 and supplied into the casing 1. The raw material water supplied into the casing 1 continuously contacts the anode electrode 22 and also continuously contacts the cathode electrode 23 through the hole 5 formed in the cation exchange membrane 21.
At the same time, a predetermined voltage is applied between the anode electrode 22 and the cathode electrode 23 by driving the power supply device 80. By this energization, the raw water is electrolyzed, and hydrogen in the raw water passes through the cation exchange membrane 21 from the anode electrode 22 side and accelerates and moves to the cathode electrode 23 side. As a result, ozone gas and oxygen gas are generated on the anode electrode 22 side, and hydrogen gas is generated on the cathode electrode 23 side.

Here, on the anode electrode 22 side, the flow of raw water is complicated by the slight unevenness of the anode electrode 22 and becomes a vortex. Therefore, on the anode electrode 22 side, the generated ozone gas is promptly taken into water and dissolved to generate ozone water, and between the anode electrode 22 and the cation exchange membrane 21 (more precisely, the anode electrode 22 and the cathode electrode 23). In this case, a state where a large amount of current flows is ensured.
When the ozone water is generated in this way, the ozone water is discharged to the anode side discharge pipe 32 through the anode side discharge channel 12a.

On the other hand, the hydrogen gas generated on the cathode electrode 23 side passes through the hole 5 and moves to the cathode electrode 23 side, and the oxygen gas generated on the anode electrode 22 side reacts with the oxygen gas that has moved to form water ( H ₂ O) is produced. And the produced | generated water flows through the loop-shaped piping 40 through the cathode side discharge flow path 12b. The water that has flowed through the loop-shaped pipe 40 again comes into contact with the cathode electrode 23 through the cathode-side supply flow path 11b and flows through the loop-shaped pipe 40 through the cathode-side discharge flow path 12b. The inside of the loop-shaped pipe 40 flows along the arrow direction shown in FIG.
Then, when the pressure in the loop-shaped pipe 40 becomes higher than the pressure in the anode side supply pipe 31 after a predetermined time has passed, the raw material water does not flow from the hole 5 to the cathode electrode 23, and to the cathode electrode 23. The new supply of raw water will be stopped. That is, the inside of the loop-shaped pipe 50 and the cathode electrode 23 are always filled with raw water or water generated by oxygen gas and hydrogen gas.

  Further, the ozone concentration is measured by the concentration detection sensor 90 during energization. Then, the measured concentration of ozone water is output to the control unit 70, and the control unit 70 adjusts the output of the power supply device 80 so that the output measured concentration becomes a preset concentration. The applied voltage between the anode electrode 32 and the cathode electrode 33 is controlled. Thus, the density | concentration of produced | generated ozone water is maintained by setting density | concentration, a density | concentration fall can be prevented and high concentration ozone water can be produced | generated stably.

As described above, according to the ozone water production apparatus 100 of the present embodiment, raw water is supplied from the anode-side supply pipe 31 to the cathode electrode 23 through the hole 5 formed in the cation exchange membrane 21, and a predetermined time has elapsed. Later, when the pressure in the loop-shaped pipe 40 becomes higher than the pressure in the anode-side supply pipe 31, the supply of raw material water from the anode electrode 22 side to the cathode electrode 23 side is stopped. At this time, the cathode electrode 23 and the loop-shaped pipe 40 are filled with the raw material water. On the other hand, since the raw material water is supplied to the anode electrode 22 at any time, the generation of ozone water is continued. . Thus, the cathode electrode 23 and the loop-shaped pipe 40 are filled with raw material water, and ozone water can be generated without discharging from the cathode electrode 23 side to the outside of the apparatus. Therefore, wastewater treatment is unnecessary, and the apparatus can be reduced in size and extended in life.
Further, since the oxygen gas generated on the anode electrode 22 side is supplied to the cathode electrode 23 through the hole 5 together with the raw water, the hydrogen gas generated on the cathode electrode 23 side is supplied from the hole 5. Return to water (H ₂ O) with oxygen gas. Therefore, ozone water can be generated with high efficiency without hindering the electric reaction by hydrogen gas.

[Second Embodiment]
FIG. 2 is a side sectional view schematically showing the outline of the ozone water production apparatus of the present invention.
In the first embodiment, the hole 5 formed in the cation exchange membrane 21 is used as the cathode side supply means. However, in the second embodiment, the cathode side supply means is connected to the anode side supply pipe 31A. The cathode side supply pipe 33A is branched and connected to the loop-shaped pipe 40A.
Specifically, the upstream end of the cathode side supply pipe 33A is connected to the upstream side of the anode side supply flow path 11aA of the anode side supply pipe 31A, and the downstream end is connected to the loop-shaped pipe 40A.
Since other configurations are the same as those in the first embodiment, the same numerals are given to the same components, and the description thereof is omitted.

A method of generating ozone water using such an ozone water production apparatus 100A will be described.
First, raw water is supplied from the raw water supply source 60A to the anode side supply pipe 31A and supplied into the casing 1A. The raw material water supplied into the casing 1A is in continuous contact with the anode electrode 22A. The raw water flowing through the anode-side supply pipe 31A also flows into the cathode-side supply pipe 33A, further flows through the loop-shaped pipe 40A, and continuously contacts the cathode electrode 23A through the cathode-side supply flow path 11bA. The inside of the loop-shaped pipe 40A flows along the arrow direction shown in FIG.
At the same time, a predetermined voltage is applied between the anode electrode 22A and the cathode electrode 23A by driving the power supply device 80A. By this energization, the raw water is electrolyzed, ozone gas and oxygen gas are generated on the anode electrode 22A side, and hydrogen gas is generated on the cathode electrode 23A side.
The ozone gas is taken into the water to generate ozone water, and the ozone water is discharged to the anode side discharge pipe 32A through the anode side discharge channel 12aA.

On the other hand, the hydrogen gas generated on the cathode electrode 23A side is moved from the oxygen gas generated on the anode electrode 22A side to the cathode electrode 23A side via the cathode side supply pipe 33A and the loop-shaped pipe 40A. To produce water (H ₂ O). And the produced | generated water flows through the loop-shaped piping 40A via the cathode side discharge flow path 12bA. The water that has flowed through the loop-shaped pipe 40A again comes into contact with the cathode electrode 23A through the cathode-side supply flow path 11bA, and flows through the loop-shaped pipe 40A through the cathode-side discharge flow path 12bA. The inside of the loop-shaped pipe 40A flows along the arrow direction shown in FIG.
After a predetermined time has elapsed, when the pressure in the loop-shaped pipe 40A becomes higher than the pressure in the anode-side supply pipe 31A, the raw water does not flow from the anode-side supply pipe 31A to the cathode-side supply pipe 33A. The new supply of raw material water to the cathode electrode 23A is stopped. That is, the cathode side supply pipe 33A, the looped pipe 40A, and the cathode electrode 23A are always filled with raw water or water generated by oxygen gas and hydrogen gas.

As described above, according to the ozone water producing apparatus 100A of the present embodiment, the raw water is supplied from the anode side supply pipe 31A to the cathode electrode 23A via the cathode side supply pipe 33A, and after a predetermined time has passed, When the pressure becomes higher than the pressure in the anode side supply pipe 31A, the supply of the raw material water from the anode electrode 22A side to the cathode electrode 23A side is stopped. At this time, the cathode electrode 23A and the loop-shaped pipe 40A are filled with the raw material water. On the other hand, since the raw material water is supplied to the anode electrode 22A at any time, the generation of ozone water is continued. . As described above, the cathode electrode 23A and the loop-shaped pipe 40A are filled with the raw material water, and ozone water can be generated without discharging from the cathode electrode 23 side to the outside of the apparatus. Therefore, wastewater treatment is unnecessary, and the apparatus can be reduced in size and extended in life.
Further, since the anode side supply pipe 31A and the cathode side supply pipe 33A are connected, oxygen gas generated on the anode electrode 22A side passes to the cathode electrode 23A side via the cathode side supply pipe 33A and the loop-shaped pipe 40A. Thus, the hydrogen gas generated on the cathode electrode 23A side is returned to water (H ₂ O) by the oxygen gas. Therefore, ozone water can be generated with high efficiency without hindering the electric reaction by hydrogen gas.

[Third Embodiment]
FIG. 3 is a side sectional view schematically showing the outline of the ozone water production apparatus of the present invention.
In the third embodiment, as in the first embodiment, the hole 5B formed in the cation exchange membrane 21B is formed as the cathode-side supply means, but the loop-shaped pipe 40 is provided. Instead, a cathode side connecting tube 41B that connects the cathode electrode 23B side of the casing 1B and the raw material water supply source 60B is provided.
Specifically, in the first embodiment, the cathode-side supply channel 11b formed in the upper end portion of the second housing 14 is the cathode-side discharge channel 12bB in the third embodiment, and the first In this embodiment, the cathode side discharge flow path 12b formed at the lower end of the second housing 14 is closed. And the cathode side connecting pipe 41B which connects the cathode side discharge flow path 12bB and the raw material water supply source 60B is provided.
Since other configurations are the same as those in the first embodiment, the same numerals are given to the same components, and the description thereof is omitted.

A method of generating ozone water using such an ozone water production apparatus 100B will be described.
First, raw water is supplied from the raw water supply source 60B to the anode side supply pipe 31B and supplied into the casing 1B. The raw material water supplied into the casing 1B is in continuous contact with the anode electrode 22B, and is continuously in contact with the cathode electrode 23B through the hole 5B formed in the cation exchange membrane 21B.
At the same time, a predetermined voltage is applied between the anode electrode 22B and the cathode electrode 23B by driving the power supply device 80B. By this energization, the raw water is electrolyzed, ozone gas and oxygen gas are generated on the anode electrode 22B side, and hydrogen gas is generated on the cathode electrode 23B side.

  The ozone gas is taken into the water to generate ozone water, and the ozone water is discharged to the anode side discharge pipe 32B through the anode side discharge channel 12aB.

On the other hand, the hydrogen gas generated on the cathode electrode 23B side passes through the hole 5B and moves to the cathode electrode 23B side, and the oxygen gas generated on the anode electrode 22B side reacts with the oxygen gas that has moved to form water ( H ₂ O) is produced. And the produced | generated water flows through the cathode side connection pipe | tube 41B via the cathode side discharge flow path 12bB. The water flowing through the cathode side discharge pipe 41B is returned to the raw material water supply source 60B, and again comes into contact with the cathode electrode 23B through the anode side supply pipe 31B and the hole 5B, and passes through the cathode side discharge flow path 12bB. And flows through the cathode side connecting tube 41B. The cathode side connecting tube 41B flows along the arrow direction shown in FIG.
Then, when the pressure in the cathode side connection pipe 41B becomes higher than the pressure in the anode side supply pipe 31B after a predetermined time has elapsed, the raw water does not flow from the hole 5B to the cathode electrode 23B, and the cathode electrode 23B The new supply of raw water to is stopped. That is, the cathode side connecting tube 41B and the cathode electrode 23B are always filled with raw material water or water generated by oxygen gas and hydrogen gas.

As described above, according to the ozone water production apparatus 100B of the present embodiment, the raw water is supplied from the anode side supply pipe 31B to the cathode electrode 23B through the hole 5B, and the pressure in the cathode side connection pipe 41B after a predetermined time has elapsed. Is higher than the pressure in the anode side supply pipe 31B, the supply of the raw material water from the anode electrode 22B side to the cathode electrode 23B side is stopped. At this time, the cathode electrode 23B and the cathode side connection pipe 41B are filled with the raw material water. On the other hand, since the raw material water is supplied to the anode electrode 22B as needed, the generation of ozone water is continued. Become. Thus, the cathode electrode 23B and the cathode side connecting tube 41B are filled with the raw material water, and ozone water can be generated without discharging from the cathode electrode 23B side to the outside of the apparatus. Therefore, wastewater treatment is unnecessary, and the apparatus can be reduced in size and extended in life.
Further, since the oxygen gas generated on the anode electrode 22B side is supplied to the cathode electrode 23B along with the raw water through the hole 5B, the hydrogen gas generated on the cathode electrode 23B side is supplied from the hole 5B. Return to water (H ₂ O) with oxygen gas. Therefore, ozone water can be generated with high efficiency without hindering the electric reaction by hydrogen gas.

EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto.
Using the ozone water production apparatus of Examples 1 to 3 shown below, ozone water was produced 10 times under the following conditions, and the ozone concentration of the produced ozone water is shown in Table 1 below.
Raw water: tap water Water temperature of raw water: 18.6 ° C
Temperature: 18.6 ° C
Raw material water conductivity: 265 μS / cm
Raw material water flow: 1 L / min
Raw water discharge: 180ml
Ozone concentration meter: OZ-20 (manufactured by TOA DK Corporation)
Anode electrode thickness: 2mm
Cathode electrode thickness: 2mm
Cation exchange membrane: Nafion membrane The DC voltage applied between the anode electrode and the cathode electrode was 8.0V.

<Example 1>
As shown in FIG. 1, an ozone water production apparatus 100 provided with a cation exchange membrane 21 in which a hole 5 was formed was used.

<Example 2>
As shown in FIG. 2, an ozone water production apparatus 100A provided with a cathode side supply pipe 33A branched from the anode side supply pipe 31A and connected to the loop-shaped pipe 40A was used.

<Example 3>
As shown in FIG. 4, an ozone water production apparatus 100C provided with a cathode side drain pipe 34C that drains the raw water on the cathode electrode 23C side was used.

As is apparent from the results shown in Table 1, when the ozone water production apparatus of the present invention is used, the concentration is as high as in the case of conventional wastewater treatment without draining from the cathode electrode to the outside of the apparatus. Of ozone water. As a result, it is possible to reduce the size and life of the device.
In Examples 1 and 2, after the generation of ozone water was started, the looped pipe was instantly removed, transferred to a beaker, and a dissolved dissolved hydrogen meter (ENH-1000: manufactured by Trustrex Co., Ltd.) was immersed in the dissolved hydrogen concentration. When measured, all were 0 ppb. From this, it is recognized that the hydrogen gas generated on the cathode electrode side immediately reacts with the oxygen gas moved from the anode side and returns to water.

1, 1A, 1B Casing 2, 2A, 2B Catalytic electrodes 3, 3A, 3B Accommodating chambers 5, 5B Holes 11a, 11aA, 11aB Anode-side supply channels 11b, 11bA Cathode-side supply channels 12a, 12aA, 12aB Anode side Discharge flow path 12b, 12bA, 12bB Cathode side discharge flow path 13, 13A, 13B First casing 14, 14A, 14B Second casing 15, 15A, 15B, 16, 16A, 16B Holding plates 21, 21A, 21B Positive Ion exchange membranes 22, 22A, 22B Anode electrodes 23, 23A, 23B Cathode electrodes 24, 24A, 24B Conductors 31, 31A, 31B Anode side supply tubes 32, 32A, 32B Anode side discharge tubes 33A Cathode side supply tubes 40, 40A Loop Shaped pipe 41B Cathode side connection pipe 60, 60A, 60B Raw material water supply source 70, 70A, 70B Control unit 80, 80A, 80B Power supply device 90, 90 A, 90B Concentration detection sensors 100, 100A, 100B Ozone water production apparatuses 131, 131A, 131B, 141, 141A, 141B

Claims (9)

A catalyst electrode having a cation exchange membrane provided between an anode electrode and a cathode electrode in a casing is provided, and raw water is supplied to the anode electrode and the cathode electrode, and the anode electrode and the cathode electrode An ozone water production apparatus for producing ozone water by applying a direct current voltage between,
Raw water supply source for supplying raw water,
An anode-side supply pipe for connecting the raw water supply source and the anode electrode side of the casing, and supplying raw water from the raw water supply source to the anode electrode;
An ozone water discharge pipe that is provided on the anode electrode side of the casing and discharges ozone water produced by supplying raw water to the anode electrode;
A cathode-side supply means in which a part of the raw material water flowing in the anode-side supply pipe is supplied to the cathode electrode;
A loop-shaped pipe provided on the cathode electrode side of the casing, for discharging the raw water supplied to the cathode electrode by the cathode-side supply means, and again supplying the cathode electrode,
When raw water is supplied from the anode side supply pipe to the cathode electrode by the cathode side supply means, and the pressure in the loop-shaped pipe becomes higher than the pressure in the anode side supply pipe after a predetermined time has elapsed, The ozone water production apparatus, wherein the supply of raw material water to the cathode electrode by the cathode side supply means is stopped.   2. The ozone according to claim 1, wherein the cathode-side supply means is a hole formed in the cation exchange membrane and allowing raw water supplied to the anode electrode to pass to the cathode electrode side. Water production equipment.   The apparatus for producing ozone water according to claim 2, wherein oxygen gas generated on the anode electrode side is supplied to the cathode electrode together with the raw water through the hole.   The diameter of the said hole part exists in the range of 0.5-10 mm, The ozone water manufacturing apparatus of Claim 2 or Claim 3 characterized by the above-mentioned.   2. The ozone water production apparatus according to claim 1, wherein the cathode side supply means is a cathode side supply pipe branched from the anode side supply pipe and connected to the loop-shaped pipe. A catalyst electrode having a cation exchange membrane provided between an anode electrode and a cathode electrode in a casing is provided, and raw water is supplied to the anode electrode and the cathode electrode, and the anode electrode and the cathode electrode An ozone water production apparatus for producing ozone water by applying a direct current voltage between,
Raw water supply source for supplying raw water,
An anode-side supply pipe for connecting the raw water supply source and the anode electrode side of the casing, and supplying raw water from the raw water supply source to the anode electrode;
An ozone water discharge pipe that is provided on the anode electrode side of the casing and discharges ozone water produced by supplying raw water to the anode electrode;
A cathode-side supply means in which a part of the raw material water flowing in the anode-side supply pipe is supplied to the cathode electrode;
Connecting the cathode electrode side of the casing and the raw water supply source, and after discharging the raw water supplied to the cathode electrode by the negative electrode side supply means, a cathode side connection pipe returning to the raw water supply source; With
Raw material water is supplied from the anode side supply pipe to the cathode electrode by the cathode side supply means, and when the pressure in the cathode side connection pipe becomes higher than the pressure in the anode side supply pipe after a predetermined time has elapsed, The ozone water production apparatus, wherein the supply of raw material water to the cathode electrode by the cathode side supply means is stopped.   The ozone according to claim 6, wherein the cathode side supply means is a hole formed in the cation exchange membrane and allowing the raw water supplied to the anode electrode to pass to the cathode electrode side. Water production equipment.   The apparatus for producing ozone water according to claim 7, wherein oxygen gas generated on the anode electrode side is supplied to the cathode electrode together with the raw water through the hole.   The ozone water production apparatus according to claim 7 or 8, wherein a diameter of the hole is in a range of 0.5 to 10 mm.

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