JPH02237694A - Device for producing ozonized water - Google Patents

Abstract

PURPOSE:To obtain ozonized water with high efficiency with the compact device by submerging a closed cylindrical vessel made of an alumina ceramics having specified thickness and purity in a water tank, placing a discharge electrode on its inner periphery, impressing a high-voltage AC current on the electrode and injecting an ozonized gas into raw water. CONSTITUTION:The closed cylindrical vessel 2 made of an alumina ceramics having <=1mm thickness and >=96% purity is submerged in the water tank 1. A discharge insulating dielectric for an ozonizer is placed on its inner periphery. A high-voltage AC current is applied between a discharge electrode 3 and the raw water as the grounded electrode. The raw gas such as oxygen and air is sent under pressure into the vessel 2 from an inlet 2a. The oxygen in raw gas is ozonized, directly injected into the raw water through an outlet 2b, and dissolved to obtain ozonized water from the raw water in the tank 1. By this method, ozonized water is efficiently obtained with the compact device.

Description

DETAILED DESCRIPTION OF THE INVENTION r Industrial Field of Application j The present invention relates to an ozonated water production apparatus for producing ozonated water mainly used for sterilization and bleaching. Conventional technology: Conventionally, this type of ozone water production equipment first produces gaseous ozone using an ozone generator called an ozonizer, and then the ozone from the outlet of the ozonizer is placed in a water tank in which a predetermined amount of raw water is retained. The air is blown in using a combustor or air diffuser.

[Problem to be Solved by the Invention 1] However, it is known that the above-mentioned conventional ozone water production apparatus has the drawback that it requires a complicated, expensive, and large-sized apparatus.

That is, in this kind of conventional ozonated water production device, it is necessary to prepare an ozonizer and a water tank separately, and furthermore,
Two water supply systems are required: the raw water system for the water tank and the cooling water system for cooling the ozonizer electrodes.
Furthermore, a connecting pipe is required between the ozonizer and the water tank, and a reverse valve, a compressor, etc. are required to be interposed in the middle of the connecting pipe.

In addition, ozone immediately after being generated by the ozonizer is unstable and easily decomposed, and some of it decomposes while being transported from the ozonizer to the septic plate, making it inefficient. There were also incidents of leakage. Therefore, the present invention has been made to solve the above-mentioned drawbacks, and aims to reduce the size of the tank by using the raw water in the water tank as cooling water for the electrodes, and to obtain ozonated water with high efficiency with less occurrence of leakage accidents. The purpose of this invention is to provide an ozonated water production device that can produce ozone water.

In accordance with the above-mentioned object, the structure of the present invention having the gist of the above-mentioned claims solves the above-mentioned problems by connecting the raw water inlet 1a at one end to the other end. A closed circular container body 2 made of ceramics having a thickness of 1 mm or less and an alumina purity of 96% or more is submerged and housed in a water tank 1 having an ozone water outlet 1b. A metal discharge electrode 3 facing the inner circumferential surface is housed, and a high voltage alternating current is applied to the discharge electrode 3 using the raw water in the water tank 1 as a grounding electrode. One end is provided with a pressure feed port 2a for raw material gas, and the other end is provided with an outlet port 2b for ozonized gas,
A technical measure has been taken in which a small-diameter blowhole 6 for blowing ozonized gas into the raw water is connected to the outlet 2b via a check valve 5. ``Function 1 Therefore, the ozone water production apparatus of the present invention injects raw water into the water tank 1 from the inlet 1a, allows a certain amount of raw water to stay in the water Pa1, and supplies it to a desired location from the outlet 1b. I'll do it for you. A high voltage alternating power source is supplied between the discharge electrode 3 and the raw water which is the ground side electrode, and a pressure feed port 2a
The raw material gas such as oxygen or air is stored in a sealed cylindrical container body 2.
Pressure feed inside. Then, the raw material gas that has flowed into the sealed cylindrical container body 2 from the pressure feeding port 2a comes into contact with the discharge field generated between the discharge electrode 3 and the inner peripheral surface of the sealed cylindrical container body 2, and the oxygen in the raw material gas is converted into ozone. The ozone water passes through the outlet 2b and is directly aerated and dissolved in the raw material water, turning the raw water in the water tank 1 into ozonated water. Further, the raw water flowing through the water tank i comes into contact with the outer surface of the closed cylindrical container body 2, absorbs the discharge heat generated by the discharge from the discharge electrode 3, and has the effect of cooling the discharge field. Embodiment J Next, an embodiment of the present invention will be described below with reference to the accompanying drawings. In the figure, 1 is a water tank, this water Wt1 has a predetermined capacity, and has an inlet 1a for raw water at one end and an outlet 1b for ozone water at the other end.
The raw water flowing in from the inlet 1a has this water 4i
! A predetermined amount stays in the chamber 1 and sequentially flows out from the outlet 1b to the desired use location. Furthermore, this aquarium 1
A stirring blade 10 is housed inside to stir the raw water in the water tank 1. Further, an exhaust port IC is disposed in the upper part of the water tank 1, so that undissolved content in the fume ozonized gas is exhausted from a small-diameter fumarole port 6, which will be described later, or circulated to the side of the pressure-feeding port 2a, which will also be described later. be.

In the water tank 1, a sealed cylindrical container body 2 made of ceramics and having a thickness of 1 mm or less and an alumina purity of 96% or more is submerged and housed. This sealed cylindrical container body 2 constitutes an insulated telephone body for discharge of the ozone generator, and is sealed to ensure a sealed discharge space where raw water does not flow inside. That is, the sealed cylindrical container body 2 is formed by sealing both the upper and lower ends of the cylindrical part with lid parts, but when this cylindrical part is made into two concentric parts, only the upper and lower ends of both cylindrical parts are sealed with lids, and the inside The cylindrical part may be open at both upper and lower ends so that the raw water can freely pass through the inner cylindrical part. Note that if the sealed circular container body 2 is made of ceramics, there will be no problem with waterproofness and there will be no problem in using it underwater, and if the wall thickness of the sealed cylindrical container body 2 is 1 mm or less. Although the dielectric constant and thermal conductivity are improved, since the material is submerged in water, there is no need to worry about insufficient mechanical strength even if the thickness is made thinner.Furthermore, if the alumina purity is 96% or more, the wall thickness will be reduced. The dielectric strength per 1 mm was 15 Kv, which had sufficient electrical strength for practical use. A discharge electrode 3 facing the inner peripheral surface of the sealed cylindrical container body 2 is housed inside the sealed cylindrical container body 2, and water W! A high-voltage alternating current is applied using the raw water in No. 1 as a grounding electrode. Although this discharge electrode 3 is not necessarily clearly shown in the figure, it has an uneven surface, and the upper end of the convex portion is in contact with the inner circumferential surface of the sealed cylindrical container body 2, and the bottom of the concave portion is configured to be somewhat apart from the inner circumferential surface. A discharge field is formed in this recess, and an inner cup 2 etc. is roughly housed so that the raw material gas mainly or entirely passes through this recess. may be arranged in contact with or very close to the inner peripheral surface of the sealed cylindrical container body 2, and a predetermined thin metal plate pattern is laminated on the inner peripheral surface of the sealed cylindrical container body 2 to generate a creeping discharge field. It goes without saying that there is no problem in disposing discharge electrodes of various conventionally known shapes at a certain distance from the inner circumferential surface of the closed cylindrical container body 2. Note that the high-voltage alternating current applied to the discharge electrode 3 is applied from a conventionally known power supply device 11, and an electrical circuit is closed via water containing ordinary impurities or appropriate raw water that is not an insulator. A discharge field is formed from the discharge electrode 3. In the illustrated embodiment, the ground side electrode is constructed by installing a metal tube 4 (more specifically, a tube made of metal mesh) on the outside of the closed cylindrical container body 2; 4 is used to obtain an appropriate boathouse close to the outer peripheral surface of the sealed cylindrical container body 2 when the electrical resistance of the raw water is large, and when the raw water has sufficient conductivity. Alternatively, the metal tube 4 may be omitted and the conductive water tank 1 itself may be used as the grounding electrode, or one end of a conducting wire may be connected to the raw water and the other end may be connected to the grounding side.

Further, the present invention has a pressure feeding port 2a for the raw material gas at one end of the sealed cylindrical container body 2, and an outlet port 2b for the ozonized gas at the other end.
A small-diameter blowhole 6 for blowing ozonized gas into the raw water is connected to the outlet 2b via a check valve 5. It goes without saying that this pressure feeding port 2a is connected to a discharge port of a raw material gas pressure feeding device such as a blower (not shown) arranged outside the water tank 1. As shown most clearly in FIG. 2, the check valve 5 connected to the outlet 2b is made of two expansible films 5°. 5° is polymerized and the periphery thereof is hermetically fixed, and one end has an inlet 5a that communicates the inside of the film 5°, 5' of the check valve 5 with the sheet outlet 2b, and the other end has a small-diameter jet nozzle 6.
and an outlet 5b connected to the film 5'.
, 5', the ozonized gas is supplied at a pressure higher than the water pressure, and the ozonated gas spreads out the ozonized gas films 5°, 5° to form a flow path leading to the outlet and flows through the outlet 5b. Ozonized gas is emitted from the small-diameter fumarole 6, and this film 5 is
゜． When the pressure within 5° becomes less than water pressure, both films 5°,
The area within 5° is crushed by water pressure to block the flow path of ozonized gas and prevent raw water from flowing back through the small-diameter blowhole 6. Further, it is desirable to make the diameter of the small-diameter jet nozzle 6 small in order to inject fine bubbles, and in the embodiment, the inside diameter is in
A plurality of tubes having a diameter of less than m are arranged in series at the outlet 5b to improve the efficiency of gas-liquid contact.

Further, it is preferable that the small-diameter jet nozzle 6 is arranged with its jet port facing the suction part of the agitating blade 10 described above. The port 6 is arranged toward the information part of the rotating shaft of the stirring blade, and small bubbles are pushed out from the small-diameter nozzle port 6, and the ozonized gas is agitated and divided by the stirring blade to become finer bubbles. There is. rEffect of the invention 1 The present invention is as described above, and since the closed circular container body 2 is immersed in the raw material water of the water tank 1, the device is much simpler than the conventional one in which a water tank and an ozonizer are used separately. This can be simplified, and in particular, since raw water is also used as cooling water, a cooling water supply system for cooling the discharge part of the ozonizer is not required, and a compact and inexpensive ozone water production apparatus can be provided.

Furthermore, since the sealed cylindrical container body 2 is immersed in raw material water, there is no need to worry about insufficient mechanical strength even if the sealed cylindrical container body 2 is made thin, and as a result, power consumption is reduced and it is strong. Furthermore, the closed cylindrical container body 2
Since it is thin, heat conduction, or in other words, cooling efficiency of the discharge field is improved, and an ozonated water production device that can produce efficient ozonated water can be provided. Furthermore, in the present invention, there is no need to connect the ozonizer and the water tank 1 in the outside air, so there is no need to worry about leakage, and the ozonized gas is immediately mixed into the raw material air in the water tank 1, so there is no need to connect the ozonizer and the water tank 1 in the outside air. Therefore, it is possible to provide an efficient ozone water production device that does not cause decomposition and can send almost the entire amount of generated ozone into raw water.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view of the ozone water production apparatus of the present invention, and FIG. 2 is an enlarged cross-sectional view of a check valve used in the present invention. 1~Aquarium 1a~Inlet 1b~Outlet
2 ~ Closed round container body 2a ~ Pressure feeding port 2b ~ Outlet
3~Discharge electrode 5~Check valve 6~Small diameter blowhole p I m Arrival m

Claims (1)

[Claims] An inlet 1a for raw water at one end and an outlet 1 for ozone water at the other end.
A sealed cylindrical container body 2 made of ceramics with a thickness of 1 mm or less and an alumina purity of 96% or more is submerged and housed in a water tank 1 having a water tank 1. A metal discharge electrode 3 is housed, and a high-voltage alternating current is applied to the discharge electrode 3 using the raw material water in the water tank 1 as a grounding electrode. Also, at one end of the sealed cylindrical container body 2, there is a port for pressurizing the raw material gas. 2a is provided with an outlet 2b for ozonized gas at the other end, and a small-diameter blowhole 6 for blowing ozonized gas into the raw material water is connected to the outlet 2b via a check valve 5. Device.