JPS63104697A - Apparatus for producing ozone dissolved water - Google Patents

Abstract

PURPOSE:To easily produce ozone dissolved water having a high ozone concn. by forming the circulating flow which returns the ozone dissolved water stored in a storage tank via a reflux pipe and feed pipe to a dissolution tank and feeding fresh ozonizing gas to the water. CONSTITUTION:A water feed pump 2, a 1st ejector 5, a 2nd ejector 6 and a check valve 16 are interposed in series to the water feed pipe 9 to the dissolution tank 1 which is a hermetic vessel equipped with a discharge pipe 13 having a drain valve 12. The pump 2 is driven to feed the ozonizing gas from an ozone generator 4 via the ejector 5 into the feed water to dissolve the ozone incorporated therein. The undissolved ozonizing gas stagnating in the tank 1 is further fed to the ejector 6 and is incorporated into the feed water. The reflux pipe 14 communicating the discharge pipe 13 and the feed pipe 9 is provided to form the circulating flow to return the ozone dissolved water stored in the storage tank through the reflux pipe 14 and the feed pie 9 to the dissolution tank so that the fresh ozonizing gas is fed into the water. The ozone dissolved water having the high ozone concn. is thereby easily produced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] This invention relates to an apparatus for producing ozone-dissolved water using air or oxygen as a raw material.

[Prior art and its problems]

This type of device is a large-capacity device that uses a high-pressure blower to blow high-concentration, high-pressure ozonized gas obtained from a large-capacity ozone generator as purification equipment in water supply facilities and wastewater treatment facilities. However, recently, devices that produce ozone-dissolved water using ozonized gas from small-capacity, low-pressure ozone generators have become popular as consumer devices for purposes such as sterilization, deodorization, and decolorization. However, the reality is that no good method has been established for this purpose.

This point will be explained below based on the drawings. 4 to 6 are configuration diagrams showing the outline of the conventional device.

FIG. 4 shows an air diffuser 24 installed at the bottom of the melting tank 1 whose top is open, and the air diffuser 24
and the ozone generator 4 through an ozone delivery pipe 10,
It is configured to dissipate ozonized gas into the water and dissolve the ozone in the water while the gas rises in the form of bubbles in the water in the dissolution tank 1, and the discharge valve 23 is opened and closed to release the ozone-dissolved gas. It is a type of extraction method. In this case, in order to obtain ozone-dissolved water with a sufficient concentration, the longer the residence time of the bubbles in the water, the better. Therefore, the water depth of the dissolution tank should be made deeper and the equipment likely to be larger, but if the water is too deep, the ozonized gas There are disadvantages such as the problem that the pressure is low and it is impossible to go deep because there is a risk of backflow, and there is a risk that ozonized gas containing undissolved ozone will be released into the atmosphere.

FIG. 5 shows that an ozone delivery pipe 10 connected to the ozone generator 4 on the upstream side of the water supply pump 2 is connected to the water supply pipe 9, and the ozone generator 4 is connected to the supply water flowing through the water supply pipe 9 as the water supply pump 2 is driven. The water supply pump 2 is driven and the ozonated gas is mixed into the water sucked into the pump 2 to obtain ozonated water. There are problems in that the residence time of gas in water is short and ozone is not sufficiently dissolved, and undissolved ozone is easily released and harms the environment.Additionally, the ozone resistance of the water pump tends to be a major problem.

In FIG. 6, an ejector 5 is arranged between the dissolution tank 1, which is a closed container, and the water supply pump 2, and an ozone delivery pipe 10 is placed at the inlet of the ejector 5.
The ozonized gas from the ozone generator 4 is taken into the flowing water by connecting the water supply pump 2 and using the power of water when supplying water from below the dissolution tank 1 to the dissolution tank 1. This system is configured so that the ozone gas is sent to the dissolution tank 1 while being expanded, and the ozone is dissolved while it rises in the form of bubbles.The residence time of the ozonized gas in the water is sufficient, and the ozone has a relatively high yield. Even if there is an effect of obtaining dissolved water, the ozonized gas can only be taken in while the water pump is in motion, and since it is a closed container, an air vent is provided so that a certain amount of water is always stored in the dissolving tank. If the product is used continuously or if it is used continuously.

There is also the problem that the residence time of the ozonized gas tends to be insufficient and that undissolved ozone is released.

What the above three cases have in common is that the ozone concentration in the ozone-dissolved water cannot be raised too high due to the short residence time of the ozonized gas, and undissolved ozone is released into the atmosphere. This is a drawback.

[Purpose of the invention]

The present invention has been made with the above points in mind, and is a low-pressure ozone generator that eliminates the release of ozonized gas containing undissolved ozone into the atmosphere. It is an object of the present invention to provide a compact ozone-dissolved water producing device capable of producing ozone-dissolved water with a high yield even when the water is used.

[Summary of the invention]

According to the present invention, the above object provides an ozone generator.

A dissolution tank that dissolves and stores ozone and a water pump.

A water supply pipe that is connected to the dissolution tank through a first ejector, a second ejector, and a reverse valve; a discharge pipe that is equipped with a discharge valve and that sends out the ozone-dissolved water in the dissolution tank; an ozone reflux pipe that extracts the accumulated ozonized gas and sends it to the second ejector; a pressure switch that outputs an electric signal when the pressure of the accumulated ozonized gas exceeds a set value; and an electric signal from the pressure switch. A discharge pipe is equipped with a solenoid valve whose opening/closing is controlled and an ozone catalytic decomposer, and a level switch which outputs an electric signal when the water level in the dissolution tank deviates from a set value. A reflux pipe equipped with an electromagnetic valve that branches from the discharge pipe on the upstream side of the valve and is connected to the water supply pipe on the upstream side of the water supply pump, and an ozone pipe that sends the ozonized gas discharged from the ozone generator to the first ejector. In response to the delivery of ozone dissolved water, it controls the opening and closing of the discharge valve and the solenoid valve connected to the ozone delivery pipe, the drive motor of the water supply pump, and the drive of the ozone generator, and also controls the operation of the level switch. This is achieved by controlling the opening and closing of electromagnetic valves connected to the reflux pipe and the ozone delivery pipe, the drive motor of the water supply pump, and the drive of the ozone generator using electric signals.

[Embodiments of the invention]

Embodiments to which the present invention is applied will be described below based on the drawings. FIG. 1 is a block diagram showing an outline of ozone-dissolved water production according to an embodiment, and FIGS. 2 and 3 are both schematic diagrams of an ozone-dissolved water producing apparatus according to another embodiment.

In Fig. 1, numeral 1 is a dissolution tank made in a closed container, and water is supplied from below the nuclide from a water supply source (not shown) through a water supply pipe 9, and the side wall of the nuclide 1 is electromagnetic. A discharge pipe 13 equipped with a discharge valve 12 is connected thereto, and when the discharge valve 12 is opened, ion-dissolved water is sent to a supply destination (not shown).

Further, the water supply pipe '9 is driven by a water supply pump 2 directly connected to a water supply pump driving electric motor (hereinafter referred to as a drive motor) 3 whose drive is controlled by an electric signal, and the pressurized water supplied through the water supply pump 2. A first ejector 5 is connected to an ozone delivery pipe 1o with a solenoid valve 8 interposed in its suction port, and a dissolution tank 1 is driven by the pressurized water discharged from the first ejector 5. A second ejector 6 to which an ozone reflux pipe 11 for extracting and sending the ozonized gas retained in the second ejector 6 and a check valve 16 are interposed in series on the above-mentioned bottom. One end of the ozone delivery pipe 1o is connected to the ozone generator ft4, and the other end is connected to the first ozone generator via the solenoid valve 8.
It is connected to the suction port of the ejector 5.

Therefore, when the water supply pump 2 and the ozone generator 4 are driven and the solenoid valve 8 is opened, pressurized water flows through the water supply pipe 9.
The first ejector 5 is an ozone delivery pipe l from the ozone generator 4.
The ozonized gas supplied through O is taken into the water supply and flows as bubbles, reaches the dissolution tank 1 via the second ejector 6 and reverse valve 16, and rises in the liquid stored in the dissolution tank 1. During this time, ozone in the gas dissolves into water, producing ozone-dissolved water. On the other hand, the undissolved portion of the osinated gas remains in the upper part of the dissolution tank 1, but it is sent to the second ejector 6 via the ozone circulation pipe 11, and is taken into the pressurized water supply flowing through the water supply pipe 9 again. The ozone flows into the dissolution tank 1 via the upper valve 16, and the ozone therein is circulated so as to be incorporated into the solution. Furthermore, the dissolving tank 1 is provided with a solenoid valve 15 that branches from the discharge pipe 13 on the upstream side of the discharge valve 12 of the discharge pipe 13 and immediately after the branch, and the terminal end is connected to the water supply pipe 9 upstream of the water supply pump 2. A reflux pipe 14 connected to the side is provided. Therefore, when the water supply pump 2 is driven with the discharge valve 13 closed or slightly open and the solenoid valve 15 open, the ion-dissolved water in the dissolution tank 1 returns to the water supply pipe 9 via the circulation pipe 14 and further. The water supply pump 21 is arranged to generate a circulation flow that returns to the melting tank 1.

In addition, dissolution tank 1 # is equipped with a level switch 7 that detects the water level of ozone dissolved water stored inside and outputs an electric signal if there is an increase or decrease from the set water level. detects the pressure of undissolved ozonized gas,
and a pressure switch 19 that outputs an electric signal when the pressure becomes higher than the set pressure.

A solenoid valve 20 whose opening/closing is controlled by an electric signal from the switch 19 is connected to a discharge pipe 22 in which an ozone catalytic decomposer 21 is installed, and the pressure of the ionized gas retained in the dissolution tank l is set. When the pressure becomes higher than that, the ozone in the gas is decomposed, rendered harmless, and released into the atmosphere.

The ozone-dissolved water production apparatus configured as described above operates by the discharge valve 12 and the solenoid valve 8 in response to the opening and closing of the supply valve (not shown).
The opening/closing of the ozone generator and the driving of the drive motor 3 and ozone generator 4 are controlled, and the control system is shown by broken lines. That is, when the supply tap (not shown) is opened, the drive motor 3 and the ozone generator 4 are driven, and at the same time, the drain valve 12 and the solenoid valve 8 are opened. Therefore, at the same time as the delivery of the ozone dissolved water stored in the dissolution tank 1 starts, the water supply pump 2 is driven and pressurized water flows into the water supply pipe 9 and passes through the first ejector 5 and the second ejector 6. The production of ozone-dissolved water begins by sucking and mixing ozonized gas into the water supply.

Ozone is further dissolved in the dissolution tank 1, and ozone-dissolved water is stored. At that time, the water level in the dissolution tank 1 falls below the set water level, so the level switch 7 detects this and outputs an electric signal to continue driving the drive motor 3 and ozone generator 4 and opening the solenoid valve 8. At the same time, it works to open the solenoid valve 15 of the circulation pipe 14 (.

On the other hand, when the supply valve is closed and the supply of ozone-dissolved water is stopped, the drive motor 3 and the ozone generator [4] are stopped, and the discharge valve 12 and... @ Valve 8 is instructed to close, but since the electric signal from the level switch 7 is still active, the supply of ozone dissolved water is stopped and the water level in the dissolving tank 1 rises until the opening drive motor 3 and The operation of the ozone generator 4 and the opening of the electromagnetic valves 8 and 15 are continued, and control is such that everything is stopped and closed only when the water level in the tank 1 reaches the set water level. In this case, if ozone-dissolved water is not sent out for a long time, the problem that the ozone concentration of the ozone-dissolved water gradually decreases cannot be avoided.

This ozone-dissolved water production device is suitable for cases where the supply valve is frequently opened and closed due to frequent use.

The ozone-dissolved water production apparatus shown in FIG. 2 includes the above-described apparatus so as to periodically repeat driving and stopping of the drive motor 3 and ozone generator 4 and opening and closing of the electromagnetic fPs 8 and 15.
By adding a timer 17 that outputs one electric signal every fixed period of time, the opening and closing control of the solenoid valve 15 of the circulation pipe 14 is controlled by the output signal of the timer 17 without depending on the electric signal from the level switch 7. This is what I did. In other words, the functions of each part of the device that responds to the delivery of ion-dissolved water are as described above, but even when the supply of ion-dissolved water is stopped and the device is stopped for a long time, the contents of the dissolution tank 1 are intermittently This device differs from the ozone-dissolved water device A in that the ion-dissolved water is circulated through the reflux pipe 14, which prevents the ozone concentration of the ozone-dissolved water from attenuating and eliminates variations in the concentration. It has the advantage of being able to supply ozone-dissolved water.

The ozone-dissolved water manufacturing device shown in FIG. An ozone concentration detector 18 is attached that outputs an electric signal that drives the drive motor 3 and the ozone generator 4 and opens the solenoid valves 8 and 15 only while the ozone concentration is lower, and also opens and closes the solenoid valve 15 of the circulation pipe 14. The control is not based on the electric signal from the level switch 7 but on the output signal of the ozone concentration detector 18.

In other words, the functions of the various parts of the device that respond to the delivery of ion-dissolved water are as explained in FIG. This differs from the previously described embodiments in that dissolved water is circulated and at the same time new ozonized gas is fed in to maintain a constant ozone concentration in the liquid. Therefore, the drive motor 3 and the ozone generator wL4 are driven only while the ozone concentration in the liquid is decreasing, and the ozone-dissolved water in the tank 1 is circulated to supply ozonized gas. This results in an extremely economical ion-dissolved water production device that can supply ion-dissolved water with uniform ozone concentration at any time without waste.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, the ion-dissolved water production device is equipped with a drain valve and a check valve interposed in series, and the ozonized gas from the ozone generator is driven by the water supply pump. The ozone is dissolved in the water supply through the ejector, and the undissolved ozonized gas remaining in the dissolution tank is sent to the second ejector and mixed into the water supply. At the same time, a circulation pipe is installed in which the discharge pipe and the water supply are connected, and a circulation flow is created in which the ozone-dissolved water stored in the storage tank returns to the dissolution tank via the circulation pipe and the water supply pipe, resulting in new ozonization. Since the filter is configured to feed gas, the ozone in the ozonized gas is well dissolved in water, and ozone-dissolved water with a high ozone concentration can be easily produced.
Furthermore, undissolved ozonized gas is rendered harmless through an ozone catalytic decomposer and released into the atmosphere, thereby completely eliminating the harm caused by ozone to the environment. By installing a level switch, pressure switch, timer, and ozone concentration detector, it is possible to automatically prevent the ozone concentration of the ozone dissolved water from decreasing, so consider the overall balance of the device. With its compact design, the ozone-dissolved water device uses ozone with almost constant dissolved ozone concentration and strong cleaning power.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an ozone-dissolved water production apparatus according to an embodiment, and FIGS. 2 and 3 are schematic diagrams of ion-dissolved water production apparatuses according to other embodiments. FIGS. 4 to 6 are block diagrams schematically showing conventional ion-dissolved water production apparatuses. 1: #Tank disassembly, 2: Water supply pump, 3: Electric motor for driving the water supply pump (drive motor), 4 Niosin generator, 5: First ejector, 6: Second ejector, 7: Level switch, 8,
15.20: Solenoid valve, 9: Water supply pipe, 10 Niosine delivery pipe, 11 Niosine reflux pipe, 12: Discharge valve, 13: Discharge pipe,
14: Reflux tube. 17: timer, 18 niosine concentration detector, 19: pressure switch, 21 niosine catalytic decomposer, 22: discharge pipe. Flute 4 (2) Porch 5 (2)

Claims (1)

[Claims] 1) An ozone generator, a dissolution tank for dissolving and storing ozone, a water supply pump, a first ejector, a second ejector, and a check valve are interposed in series and connected to the dissolution tank. a water supply pipe, a discharge pipe that is equipped with a discharge valve and sends out the ozone-dissolved water in the dissolution tank, an ozone reflux pipe that extracts the ozonized gas remaining in the dissolution tank and sends it to the second ejector; a pressure switch that outputs an electric signal when the pressure of the accumulated ozonized gas exceeds a set value; a discharge pipe that is interposed with an ozone catalytic decomposer and a solenoid valve whose opening and closing are controlled by the output signal of the pressure switch; A level switch is provided that outputs an electric signal when the water level in the dissolution tank deviates from a set value, and the ozonized gas from the ozone generator is supplied to the first
An ozone delivery pipe equipped with a solenoid valve that sends water to the ejector,
a reflux pipe branched from the discharge pipe upstream of the discharge valve and equipped with an electromagnetic valve connected to the water supply pipe upstream of the water supply pump, and responsive to the delivery of ozone dissolved water from the dissolution tank. controls the opening and closing of the discharge valve and the solenoid valve of the ozone delivery pipe, and the driving of the drive motor of the water supply pump and the ozone generator, and further controls the electromagnetic valve of the circulation pipe and the ozone delivery pipe by the output signal of the level switch. An ozone-dissolved water production device characterized in that the opening and closing of a valve, the drive motor of the water supply pump, and the drive of the ozone generator are controlled. 2) In the manufacturing apparatus according to claim 1, the manufacturing apparatus is configured to periodically open or close the solenoid valves of the ozone delivery pipe and the return pipe, and to drive or stop the drive motor of the water pump and the ozone generator. A timer is added to output an electric signal repeatedly, and the water supply pump is driven at predetermined intervals so that the ozone dissolved water in the dissolution tank is circulated through the circulation pipe and the water supply pipe. Ozone-dissolved water production equipment. 3) In the ozone-dissolved water production apparatus according to claim 1, the ozone concentration of the ozonized gas retained in the dissolution tank is detected and an electric signal is output when the ozone concentration is lower than a set value. An ozone concentration detector is attached, and the output of the detector controls the opening and closing of the solenoid valves of the ozone delivery pipe and the return pipe, the drive motor of the water supply pump, and the drive of the ozone generator. An ion dissolution production device characterized in that the ion dissolution manufacturing device is configured such that the water is circulated through a reflux pipe and a water supply pipe.