JPH09248581A - Water purifier - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the efficiency of sterilization by mixing a water supplied from a water source with ozone gas, separating ozone gas contained in the ozone water to take out the purified water and removing impurities contained in the purified water. SOLUTION: The water passing through a water supply pipe line 4 and ozone gas supplied from an ozone gas supply pipe line 15 are mixed with each other while being compressed by a mixing pump 6, and the ozone water is discharged to the ozone aeration tank 7. Since the water and ozone gas are mixed with each other while being compressed by the mixing pump 6, ozone becomes fine bubbles, diffused in the water and efficiently dissolved in the water, and simultaneously organic materials in the water is made into low molecule. Further, since various bacteria contained in the water filtered by the prefilter 5 are sterilized, the safety as drinking water is improved. Also since the mixing pump 6 being the gas-liquid mixing means is used, this device is miniaturized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification device,
In particular, it relates to a water purification device configured to purify water supplied from a water source so that it can be used as drinking water.

[0002]

2. Description of the Related Art In a disaster prevention water purification device for securing drinking water in the event of a large earthquake, water stored in a water storage tank is passed through a membrane filter to be filtered, but it is not included in the water. The sterilizing effect could not be obtained only by removing the impurities.

Therefore, the recently developed water purification system for disaster prevention is provided with a sterilization process of sterilizing by mixing ozone gas with water. As such a water purification apparatus using ozone gas, a structure in which a diffusing tube or the like is used as a gas-liquid mixing means and the bubbles of ozone gas ejected from the diffusing tube are mixed in water for aeration, an electrophoresis tank (electrolysis tank) Tank), ozone aeration tank, ozone degassing tank, activated carbon in order to purify water, ozone aeration tank, electrophoresis tank (electrolysis tank), ozone aeration tank, ozone degassing tank, activated carbon There is a configuration to make it.

Further, a water purifying apparatus used for purifying water in lakes and rivers is constructed such that ozone gas is dissolved in water by using a mixing pump and ozone is deaerated or decomposed by ultrasonic waves or a stirrer.

[0005]

In the conventional water purifying device, when the water is filtered by the membrane filter without utilizing ozone, the sterilizing effect cannot be obtained. Therefore, if the device is not used for a long period of time, the device will not be used. There was a risk that various bacteria would be mixed in when they were produced and drinking water was produced.

Further, in the case of the apparatus having the above-mentioned structure, when ozone gas is aerated to the water by a diffuser pipe or the like, the dissolution efficiency of the ozone gas is poor, so that the apparatus for the sterilization process becomes large and it is separated from the water. There is a risk that the burden on the ozone gas treatment tank for decomposing the ozone into oxygen will increase.

Further, in the case of the apparatus configured as described above, if the amount of organic substances and ions contained in the raw water is large, the load on the electrophoresis tank will be high, and the deterioration of the electrophoresis performance will be accelerated. . Further, in the case of the device configured as described above, the ozone aeration tank, the ozone degassing tank, and the electrophoretic tank are installed between the respective devices arranged in this order in the order of activated carbon. It is provided so as to be arranged downstream of the aeration tank and upstream of the ozone degassing tank. Therefore, there is a problem that ozone mixed in water by the ozone aeration tank affects the electrodes of the electrophoresis tank and the efficiency of electrophoresis decreases.

Further, in the case of the device having the above-mentioned structure, since activated carbon is not incorporated, there is a problem that harmful substances such as organic substances and heavy metals cannot be removed. Then, this invention aims at providing the water purifier which solved the said problem.

[0009]

In order to solve the above problems, the present invention has the following features. Claim 1
The invention of claim 1 is a gas-liquid mixing means for mixing water supplied from a water source and ozone gas, and an ozone gas separating means for separating the ozone gas contained in the ozone water discharged from the gas-liquid mixing means to obtain purified water. And an impurity removing means for removing impurities contained in the purified water supplied from the ozone gas separating means.

Therefore, according to the first aspect, the efficiency of the sterilization treatment can be improved by mixing the ozone gas with the water supplied from the water source, and at the same time, the dissolution efficiency of ozone can be increased and the apparatus for the sterilization process can be downsized. Further, it is possible to reduce the burden on the ozone gas treatment tank for decomposing ozone separated from water into oxygen. Furthermore, since the gas-liquid mixing means for mixing water and ozone gas is arranged on the upstream side, when the device is started, ozone water is passed through the device and even if it has not been used for a long period of time, various germs propagated in the device. Can be sterilized.

The invention of claim 2 is characterized in that the gas-liquid mixing means is a mixing pump for mixing the water supplied from the water source and the ozone gas while pressurizing. Therefore, according to claim 2, since water and ozone gas are mixed while being pressurized by the mixing pump, various bacteria in the water can be sterilized, ozone can be efficiently dissolved, and a compact configuration can be achieved. become.

The invention according to claim 3 is characterized in that the ozone gas separating means comprises an ozone degassing tank for separating ozone contained in the ozone water by air bubbles. Therefore, according to the third aspect, since ozone is separated by air bubbles in the ozone degassing tank, excess ozone gas mixed with ozone water can be efficiently removed.

The invention of claim 4 is characterized in that the impurity removing means is an electrophoresis tank for removing impurities contained in the purified water by an electrophoresis method. Therefore, according to claim 4, the ozone water from which excess ozone has been removed is supplied to the electrophoretic tank to remove impurities contained in the purified water. It is possible to prevent a decrease in migration efficiency, and efficiently remove impurities contained in ozone water.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a water purifying apparatus according to the present invention will be described below with reference to the drawings. 1 is a schematic configuration diagram of the water purification device, and FIG. 2 is an enlarged view of the configuration of the electrophoresis tank.

The water purifying apparatus 1 is generally composed of an ozone gas generating unit 2, a liquid feeding pipe 4 for feeding water stored in a water storage tank 3 (water source), and an upstream side of the liquid feeding pipe 4 in that order. The pre-filter 5, the mixing pump (gas-liquid mixing means) 6, the ozone degassing tank (ozone gas separating means) 7, the electrophoresis tank (impurity removing means) 8, the pressurizing pump 9, the activated carbon tank 10, and the ozone provided It is composed of an ozone gas treatment tank 13 arranged in an ozone discharge conduit 12 communicating with the upper part of the degassing tank 7, and a controller 14 for controlling each device.

The water tank 3 as a water source stores water which is usually used for purposes other than drinking, such as a disaster prevention water tank or a swimming pool. And in the water tank 3,
The water intake section 4a of the liquid supply conduit 4 is inserted, and the water stored in the water storage tank 3 is pumped up by the mixing pump 6 arranged in the liquid supply conduit 4 and sent to the downstream side.

The pre-filter 5 mounted on the downstream side of the water storage tank 3 is a filter for filtering the water taken in from the water storage tank 3 and is a suspended matter or suspended substance (solid matter) contained in the water in the water storage tank 3. (Dispersed molecules) etc. are removed. Therefore, the water filtered by the prefilter 5 is supplied to the mixing pump 6 attached to the downstream side of the prefilter 5.

Further, the mixing pump 6 is connected to an ozone gas supply pipe 15 from the ozone gas generating unit 11. Therefore, the mixing pump 6 mixes the ozone gas supplied from the ozone gas supply conduit 15 with the water flowing through the liquid supply conduit 4 while pressurizing it, and discharges the ozone water to the ozone degassing tank 7.

In the mixing pump 6, water and ozone gas are mixed while being pressurized, so that ozone is dispersed in water in the form of minute bubbles, and the ozone gas can be efficiently dissolved in the water and ozone is oxidized. As a result, the organic matter in the water is reduced in molecular weight. In addition, since various bacteria contained in the water filtered by the pre-filter 5 are sterilized by ozone, the safety for beverages is enhanced.

Further, by using the mixing pump 6 as the gas-liquid mixing means, the mixing pump 6 can be made smaller than the structure in which the bubbles of ozone gas are mixed in the water tank by using the air diffuser, and the installation space can be reduced, and the mixing pump 6 can be used. Has a dual role of a gas-liquid mixing means and a liquid sending means, the manufacturing cost can be kept low compared to the case where each means is individually installed. Further, the amount of ozone gas separated in the ozone degassing tank 7 installed on the downstream side of the mixing pump 6 is reduced, and the burden on the ozone gas processing tank 13 is reduced.

The ozone deaeration tank 7 is connected at its lower part to a water supply pipe 4b of the liquid supply pipe 4, and the ozone water mixed by the mixing pump 6 is supplied through the water supply pipe 4b of the liquid supply pipe 4. To be done. An air diffuser 16 is inserted in the bottom of the ozone degassing tank 7, and an air supply pipe 17 is connected to the air diffuser 16.

Therefore, inside the ozone degassing tank 7, the ozone water discharged from the mixing pump 6 and the diffuser 16
The air discharged from the air is mixed, and the bubbles of the compressed air supplied from the air supply pipe 17 float upward in the ozone water. The ozone water supplied into the ozone degassing tank 7 is aerated by the bubbles of compressed air. That is, since the ozone mixed with the ozone water discharged from the mixing pump 6 is in equilibrium with the air, the ozone dissolved in the ozone water is separated from the water by the air aeration and floats upward. Alternatively, ozone is separated by the impact of air aeration. Further, not only ozone but also low molecular weight organic compounds (VOC etc.) are separated from water and float upward.

Therefore, in the upper space of the ozone degassing tank 7,
Excess ozone gas and low molecular weight organic compounds separated from water by air aeration are accumulated. Then, the ozone gas and the low molecular weight organic compounds separated in the ozone degassing tank 7 are discharged to the ozone gas processing tank 13 through the ozone discharge conduit 12 communicating with the upper space of the ozone degassing tank 7. In the ozone gas treatment tank 13, ozone deaerated from ozone water is decomposed into oxygen.

In the ozone degassing tank 7, ozone water from which ozone gas and low molecular weight organic compounds have been removed passes through the water supply pipe 4c of the liquid feeding pipe 4 and the electromagnetic valve 18 and is supplied to the electrophoresis tank 8. It As shown in FIG. 2, an anode 19 and a cathode 20 are inserted inside the electrophoretic tank 8 so as to extend in the vertical direction. The anode 19 and the cathode 20 are connected to a DC power source 21 and are given a potential.

The ozone water sent through the water supply pipe 4c of the liquid sending pipe 4 connected to the upper part of the ozone degassing tank 7 is supplied to the upper part of the electrophoresis tank 8. Therefore, when the ozone water from the ozone degassing tank 7 is supplied to the electrophoresis tank 8, components such as organic substances and heavy metal ions contained in the ozone water are electrophoresed by the potential difference between the anode 19 and the cathode 20. Anode 19
Alternatively, it moves to the vicinity of the cathode 20.

Since the electrophoresis tank 8 is provided on the downstream side of the ozone degassing tank 7, the ozone water from which the excess ozone gas has been removed is supplied to the ozone degassing tank 7. Therefore, in the electrophoresis tank 8, the anode 19 and the cathode 2
The influence of ozone on 0 is reduced, and the decrease in the efficiency of electrophoresis is prevented.

On the lower surface of the electrophoresis tank 8, a first drainage pipe 22 communicating below the anode 19, a second drainage pipe 23 communicating below the cathode 20, and a middle portion are communicated. The water supply pipe 4d of the liquid supply pipe line 4 is attached. Electromagnetic valves 24 and 25 are arranged in the drain pipes 22 and 23.

At the bottom of the electrophoresis tank 8, the anode 1
9, the rectifying plate 2 which protrudes inward corresponding to the lower end of the cathode 20
6, 27 are provided. The straightening plates 26 and 27 are
Since it extends upward so as to be located inside the lower ends of the anode 19 and the cathode 20, the organic substances and heavy metal ions collected near the anode 19 and the cathode 20 are rectified by the rectifying plates 26 and 27 and the electrophoresis tank 8. To the inner wall of the. Then, water from which impurities such as organic substances and heavy metal ions have been removed remains between the anode 19 and the cathode 20.

Solenoid valve 2 disposed in drain pipes 22 and 23
When valves 4 and 25 are opened, water concentrated with organic substances and heavy metal ions is discharged to the outside. Then, the water flowing between the anode 19 and the cathode 20 passes through the water supply pipe 4d of the liquid supply pipe 4 communicated between the flow straightening plates 26 and 27 after impurities such as organic substances and heavy metal ions are removed. Is supplied to the pump 9.

The water discharged from the pump 9 is supplied to the liquid feed conduit 4
It is supplied to the lower part of the activated carbon tank 10 through the water supply pipe 4e. In the activated carbon tank 10 filled with activated carbon, water pressurized by the pump 9 is supplied, so that minute impurities that cannot be removed even in the electrophoresis tank 8 among organic substances in water decomposed by ozone oxidation are activated carbon. Adsorbed by and completely removed. Further, the activated carbon tank 10 is the electrophoresis tank 8
Since it is provided on the downstream side, water from which impurities such as organic substances and heavy metal ions are removed by the electrophoresis tank 8 is supplied, and the burden on the activated carbon is reduced.

When the solenoid valve 28 arranged in the water supply pipe 4f of the liquid feed pipe 4 connected to the upper part of the activated carbon tank 10 is opened, purified water is supplied to the downstream side as drinking water. .
As described above, in the water purification device 1, the pre-filter 5, the mixing pump 6, the ozone degassing tank 7, the electrophoresis tank 8, the pressurizing pump 9, and the activated carbon tank 10 are arranged from the upstream side of the liquid feeding conduit 4.
Ozone water generated by the mixing pump 6 is purified by flowing through the ozone degassing tank 7, the electrophoresis tank 8, the pressurizing pump 9, and the activated carbon tank 10. Therefore, even if various bacteria are propagated in each device without being used for a long period of time, each device provided downstream from the mixing pump 6 can be sterilized.

Next, the ozone gas generating unit 11 will be described. The ozone gas generation unit 2 includes an oxygen gas generation unit 29 that generates a high-concentration oxygen gas, and an ozone gas generator 30 that generates ozone from the oxygen gas supplied from the oxygen gas generation unit 29.

The oxygen gas generator 29 is, for example, a PSA.
(Pressure Swing Adsorption) Separation method is used to separate and generate oxygen at a higher concentration than in the atmosphere. still,
Oxygen supply means other than the PSA separation method, for example, an oxygen cylinder filled with high-concentration oxygen may be used as the oxygen gas generator 29, or ozone gas may be generated from air.

Here, the structure of the oxygen gas generator 29 when the PSA separation method is used will be described. The oxygen gas generation unit 29 includes a compressor 31 that compresses air in the atmosphere.
And an air dryer 32 for dehumidifying the compressed air supplied from the compressor 31, and a compressed gas supplied from the air dryer 32 as a raw material gas (air is 78% nitrogen, 18% oxygen, and the rest is other components). A pair of adsorption tanks 33 and 34 for separately generating oxygen molecules contained in the air,
It has an oxygen gas tank 35 for storing the oxygen gas taken out from the pair of adsorption tanks 33, 34.

Air dryer 32 and a pair of adsorption tanks 33, 3
Each conduit that connects the 4 and a conduit and a pair of adsorption vessel 33 and 34 for connecting the oxygen gas tank 35, valve V ₁ ~V ₈ comprising an electromagnetic valve is arranged. In addition, the adsorption tank 33,
34 is filled with an adsorbent (not shown) made of zeolite.

When the compressed air compressed by the compressor 31 is supplied into the adsorption tanks 33 and 34 and the adsorption tanks 33 and 34 are pressurized, this zeolite adsorbs nitrogen molecules contained in the compressed air. . Then, the remaining oxygen molecules in the adsorption tanks 33 and 34 that have not been adsorbed by the zeolite are taken out.

Therefore, by controlling the opening and closing of each of the valves V _{1 to} V ₈ , the adsorption tanks 33 and 34 alternately generate oxygen by a pressure increasing step (adsorption), a pressure reducing step (regeneration), an extraction step and a pressure equalizing step. Repeating the cycle, the oxygen concentration is about 9
A high concentration oxygen gas concentrated to 0% is supplied to the oxygen gas tank 35.

In the adsorption tanks 33 and 34, a series of oxygen generation cycles are shifted by 180 ° so that high concentration oxygen gas is alternately taken out so that one of the adsorption tanks 33 and 34 is a pressure increasing step and the other is a pressure reducing step. each valve V ₁ ~V ₈ is opened and closed controlled. In addition, the valves V _{1 to} V for each of the above steps
Opening / closing control of ₈ is performed as follows.

Pressure rising step: Only the valve V ₁ or V ₂ is opened, and the other valves are kept closed. As a result, compressed air is supplied to the adsorption tank 33 or 34. Pressure reduction step: Only valve V ₃ or V ₄ is opened and the other valves are kept closed. As a result, the nitrogen gas in the adsorption tank 33 or 34 is exhausted to the atmosphere.

Extraction process: Only the valve V ₅ or V ₆ is opened and the other valves are kept closed. As a result, oxygen molecules other than nitrogen adsorbed by the zeolite in the adsorption tank 33 or 34 are taken out and supplied to the oxygen gas tank 35. Pressure equalizing step: Only the valves V ₇ and V ₈ are opened and the other valves are kept closed. As a result, the adsorption tanks 33, 34
The pressure inside becomes uniform.

The oxygen gas tank 35 of the oxygen gas generating unit 29 having the above-described structure is connected to the ozone gas generator 30 via the extraction pipe line 36. An extraction valve 37, which is an electromagnetic valve, is disposed in the extraction conduit 36. Therefore, when the extraction valve 37 is opened, the oxygen gas in the oxygen gas tank 35 is supplied to the ozone gas generator 30.

The ozone gas generator 29 is constructed to generate ozone by a silent discharge method, for example, and a voltage is applied between the electrodes to generate silent discharge to generate ozone.
In addition, the ozone gas generator 29 includes the oxygen gas generator 2
Since the high-concentration oxygen gas generated in 6 is supplied from the oxygen gas tank 35, ozone gas can be continuously generated.

The ozone gas generated by the ozone gas generator 29 is supplied to the mixing pump 6 and filtered by the pre-filter 5 when the electromagnetic valve 38 provided in the ozone gas supply conduit 15 is opened. Mixed with water. Further, the air supply pipe line 17 is branched from a pipe line that connects the compressor 31 and the air dryer 32 to each other.
The air compressed by the compressor 31 is supplied to the air diffuser 16 by opening the valve. As a means for supplying air to the air diffuser 16, a compressor 31 is used as in this embodiment.
It may be configured to supply the compressed air from the air source, or may be configured to supply the air to the diffuser pipe 16 using an air pump.

Further, the control device 14 includes the mixing pump 6, the pump 9, the electrophoresis tank 8 and the ozone gas generator 3.
0, compressor 31, air dryer 32, valve V ₁
~ V ₈ and each solenoid valve 18, 24, 25, 28, 37, 3
Control 8,39. In addition, the controller 14 controls the ozone gas generator 30 so that the ozone water concentration becomes the target concentration value.
Various programs such as a density adjustment program for adjusting the voltage value applied to the input are input.

The control device 14 is also connected to a warm-up lamp 40, a purifying lamp 41, a drinkable lamp 42, and a power switch 43 of the water purifying device 1. Here, the processing executed by the control device 14 will be described with reference to the flowcharts of FIGS. 3 and 4.

When the power switch 43 of the water purification device 1 is turned on, the control device 14 executes the processing shown in FIGS. 3 and 4. That is, in step SP1 of FIG. 3 (hereinafter “step” is omitted), the power of the compressor 31 of the water purification apparatus 1 is turned on, the process proceeds to SP2, and the power of the air dryer 32 is turned on. In the next SP3, after the warm-up lamp 40 is turned on, the process proceeds to SP4, and it is determined whether or not a preset warm-up time Ta has elapsed. This is because a waiting time is required until the air dryer 32 can dehumidify the air.

At SP4, the warm-up time Ta
When is passed, proceed to SP5, warm-up lamp 4
After turning off 0 and opening the solenoid valve 37 arranged between the oxygen tank 35 and the ozone gas generator 30 at SP6, S
At P7, the solenoid valve 38 of the ozone gas supply line 15 is opened.

In the next SP8, the mixing pump 6 is started, and in the SP9, the purifying lamp 41 is turned on. As a result, the mixing pump 6 mixes the water flowing through the liquid supply conduit 4 with the ozone gas supplied from the ozone gas supply conduit 15 while pressurizing the ozone gas to dissolve the ozone in the water and sterilize the bacteria in the water. Then, the ozone water discharged from the mixing pump 6 is supplied to the ozone degassing tank 7.

Next, in SP10, the solenoid valve 18 of the water supply pipe 4c is opened. Thereby, in the ozone degassing tank 7, the ozone water from which the ozone gas and the low molecular weight organic compounds have been removed is supplied to the electrophoresis tank 8 through the water supply pipe 4c of the liquid feeding conduit 4 and the electromagnetic valve 18.

At the next SP11, the pump 9 is started. As a result, the water pressurized by the pump 9 is supplied to the activated carbon tank 10, so that minute impurities that could not be removed by the electrophoresis tank 8 among the organic substances in the water decomposed by ozone oxidation are adsorbed on the activated carbon. Completely removed.

Then, at SP12, the solenoid valve 2 of the water supply pipe 4f
8 is opened and the water purified by the activated carbon tank 10 as drinking water is supplied downstream. Further, at SP13, the ozone gas generator 30 is started and the ozone gas is supplied to the mixing pump 6. In the next SP14, water purification device 1
It is determined whether or not a predetermined time Tb has elapsed until the inside is sterilized by ozone and purified.
When is passed, it is judged that the purification is completed. And
When a predetermined time Tb has elapsed in SP14, SP15
Then, the solenoid valve 39 of the air supply line 17 is opened.
As a result, the air compressed by the compressor 31 is supplied to the air diffuser 16 of the ozone degassing tank 7 via the air supply conduit 17.

At the next SP16, the power source of the electrophoresis tank 8 is turned on. Subsequently, the solenoid valve 24 of the drain pipe 22 is opened at SP17, and the solenoid valve 2 of the drain pipe 23 is opened at SP18.
5 is opened. In the next SP19, it is determined whether or not a predetermined time Tc until the water in the water storage tank 3 is purified to be drinking water has elapsed, and after the predetermined time Tc has elapsed, drinking water is obtained from the activated carbon tank 10. SP20
Proceed to.

After the purifying lamp 41 is turned off at SP20, the drinkable lamp 42 is turned on at SP21 to notify that the drinking water can be supplied from the activated carbon tank 10. With this, the water pumped up from the water storage tank 3 passes through the liquid feeding conduit 4 and the pre-filter 5, the mixing pump 6,
In the process of passing through the ozone degassing tank 7, the electrophoresis tank 8, the pressurizing pump 9, and the activated carbon tank 10, impurities are removed and sterilized to become drinking water. The water purification process of producing this drinking water is continuously operated until the power switch 43 of the water purification device 1 is turned off.

At the next SP22, when the power switch 43 of the water purifying device 1 is turned off, it is determined that the water purifying device 1 is stopped, and the routine proceeds to SP23. And SP
At 23, the drinkable lamp 42 is turned off, and at SP24, the ozone gas generator 30 is stopped. Then, the power source of the electrophoresis tank 8 is turned off at SP25, the solenoid valve 24 of the electrophoresis tank 8 is closed at SP26, and the solenoid valve 25 of the electrophoresis tank 8 is closed at SP27.

Further, in SP28, the solenoid valve 38 of the ozone gas supply line 15 is closed, and in SP29, the oxygen tank 35 is closed.
Solenoid valve 37 arranged between the ozone gas generator 30 and the
Is closed. Then, at the next SP30, the mixing pump 6 is stopped, and at SP31, the electromagnetic valve 39 of the air supply conduit 17 is closed.

Subsequently, after stopping the pump 9 at SP32, the solenoid valve 18 of the water supply pipe 4c is closed at SP33, and S
At P34, the electromagnetic valve 28 of the water supply pipe 4f is closed to stop the supply of drinking water from the activated carbon tank 10. And SP3
At 5 the power of the compressor 31 is turned off and the SP
At 36, the dryer 32 is turned off. With this, the water purification device 1 is stopped.

In the above embodiment, the structure for purifying the water in the water storage tank 3 is described as an example, but the present invention is not limited to this, and water other than the water storage tank 3, such as rivers, lakes, swamps, wells, fire protection water tanks,
Of course, it can be applied to purify water from a water source such as a water supply. Further, in the above embodiment, the mixing pump 6 is used as the gas-liquid mixing means to mix water and ozone gas while pressurizing them, but the present invention is not limited to this, and the ozone gas becomes bubbles even if not pressurized. It is needless to say that a gas-liquid mixing means other than the mixing pump 6 may be used since it is mixed with water in water.

[0058]

As described above, according to the first aspect of the present invention,
Ozone gas can be mixed with water supplied from a water source to improve the efficiency of sterilization treatment, and the dissolution efficiency of ozone can be increased to downsize the sterilization apparatus. Further, it is possible to reduce the burden on the ozone gas treatment tank for decomposing ozone separated from water into oxygen. Furthermore, since the gas-liquid mixing means for mixing water and ozone gas is arranged on the upstream side, when the device is started, ozone water is passed through the device and even if it has not been used for a long period of time, various germs propagated in the device. Can be sterilized.

Further, according to the second aspect, since water and ozone gas are mixed while being pressurized by the mixing pump, bacteria in the water can be sterilized, ozone can be efficiently dissolved, and a compact structure is provided. be able to. Further, according to the third aspect, since ozone is separated by air bubbles in the ozone degassing tank, it is possible to efficiently remove the excess ozone gas mixed with the ozone water.

According to the present invention, the ozone water from which excess ozone has been removed is supplied to the electrophoresis tank to remove impurities contained in the purified water, so that the electrodes of the electrophoresis tank are affected by ozone. It is possible to prevent the efficiency of electrophoresis from being lowered without receiving the impurities and efficiently remove the impurities contained in the ozone water.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a water purification device according to the present invention.

FIG. 2 is a longitudinal cross-sectional view showing an enlarged electrophoretic bath.

FIG. 3 is a flowchart illustrating a process executed by a control device.

FIG. 4 is a flowchart executed subsequent to the processing of FIG.

[Explanation of symbols]

 1 Water Purification Device 2 Ozone Gas Generation Unit 3 Water Tank 4 Liquid Delivery Pipeline 5 Pre-filter 6 Mixing Pump 7 Ozone Degassing Tank 8 Electrophoresis Tank 9 Pressurizing Pump 10 Activated Carbon Tank 13 Ozone Gas Treatment Tank 14 Controller 15 Ozone Gas Supply Pipeline 16 Air diffuser pipe 17 Air supply pipe line 18, 24, 25, 28, 37, 38, 39 Solenoid valve 29 Oxygen gas generation part 30 Ozone gas generator 31 Compressor 32 Air dryer 33, 34 Adsorption tank 35 Oxygen gas tank

Claims (4)

[Claims] 1. A gas-liquid mixing means for mixing water supplied from a water source with ozone gas, and an ozone gas separating means for separating the ozone gas contained in the ozone water discharged from the gas-liquid mixing means to obtain purified water. And an impurity removing means for removing impurities contained in the purified water supplied from the ozone gas separating means. 2. The water purification device according to claim 1, wherein the gas-liquid mixing means is a mixing pump that mixes water supplied from the water source and ozone gas while pressurizing the mixture. 3. The water purifying apparatus according to claim 1, wherein the ozone gas separating means is an ozone degassing tank for separating ozone contained in the ozone water by bubbles. 4. The water purifying apparatus according to claim 1, wherein the impurity removing means is an electrophoretic tank for removing impurities contained in the purified water by an electrophoresis method.