JPH11332959A - Ozone water preparing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for preparing an ozone water of a stabilized ozone density. SOLUTION: In this ozone water preparing device for dissolving ozone gas in raw material water, then pressurizing it in a pressure dissolving tank 4a and raising the ozone density, by generating the eddy current of the ozone water inside the pressure dissolving tank 4a, when the air bubbles of excessive gas are gathered to the center of an eddy, since they float and are discharged from a valve 13, cavitation is prevented and the ozone density of the ozone water is stabilized. In the case of installing the pressure dissolving tank 4b further in the poststage of the pressure dissolving tank 4a, generating the eddy current inside the pressure dissolving tank 4b of the poststage and discharging the excessive gas, since ozone is retained not only in the pressure dissolving tank 4a of a preceding stage but also in the pressure dissolving tank 4b of the poststage, ozone retained time is increased as a result and the ozone density of the ozone water is raised. Since the excessive gas is discharged by the valve 13 of the pressure dissolving tank 4b of the poststage, the cavitation is prevented and the ozone density of the ozone water is stabilized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an ozone water producing apparatus.

[0002]

2. Description of the Related Art When producing ozone water, ozone was merely dissolved in raw water.

FIG. 4 is a block diagram of a conventional ozone water producing apparatus.

The ozone gas generated in the ozone gas generation unit 1 is dissolved in ozone having a mixing pump by mixing raw water (or ozone water circulated in an ozone water circulation pipe 10 described later) supplied through a pipe (indicated by a broken line) 2. The ozone water in the pressurized dissolution tank 7 is pressurized by squeezing the valve 6 between the pressurized dissolution tank 4 and the tank 5 to increase the ozone concentration, and stored in the tank 5. Was. When ozone water is used, it is sent to the outside via a pipe (indicated by a broken line) 8.

Incidentally, the tank 5 is made harmless by an ozone killer 9 in order to prevent the ozone gas in the tank 5 from accumulating, and is then opened to the atmosphere. For this reason, the ozone gas is gradually released from the ozone water stored in the tank 5 and the ozone concentration is reduced. Therefore, a part of the ozone water in the tank 5 is returned to the ozone dissolving mechanism 3 through the ozone water circulation pipe 10. The concentration was kept constant by a circulation system in which the concentration was increased by adding ozone and stored in the tank 5 again. The pressure of the circulation system is adjusted by the degree of opening and closing of the valve 6.

[0006]

However, in the conventional apparatus for producing ozone water, the excess gas of ozone, which has not been completely dissolved in the ozone water when circulating the ozone water, is released to the atmosphere by piping or a tank for storing the ozone water. Underneath, large bubbles are formed, and fine ozone in the ozone water is taken out of the system, which is a factor of lowering the ozone concentration of the ozone water. In addition, there is a problem that large bubbles cause cavitation and the concentration of ozone water is not stable.

Accordingly, an object of the present invention is to solve the above problems and to provide an ozone water producing apparatus having a stable ozone concentration.

[0008]

In order to achieve the above object, the present invention relates to an ozone water producing apparatus for increasing the ozone concentration by dissolving ozone gas in raw water and pressurizing it in a pressurized dissolution tank. An ozone water inlet and an ozone water outlet are provided so as to generate a swirling flow of ozone water in the dissolution tank, and an excess gas release mechanism for removing excess gas in the ozone water is provided at the upper part of the pressurized dissolution tank.

Further, the present invention provides an ozone water producing apparatus for increasing the ozone concentration by dissolving ozone gas in raw water and then pressurizing the ozone gas in a pressurized dissolving tank, further comprising a pressurizing dissolving tank after the pressurizing dissolving tank. An ozone water inlet and an ozone water outlet are provided so that vortex flow of ozone water is generated in the latter pressure dissolution tank, and an excess gas release mechanism for removing excess gas in the ozone water is provided at the upper part of the latter pressure dissolution tank. It is provided in.

According to the present invention, the vortex of the ozone water is generated in the pressurized dissolution tank, so that the bubbles of the surplus gas gather and float at the center of the vortex and are discharged from the surplus gas venting mechanism. Is prevented, and the ozone concentration of the ozone water is stabilized.

[0011] Further, a pressure dissolution tank is further provided at the subsequent stage of the pressure dissolution tank, and when a vortex is generated in the subsequent pressure dissolution tank to extract excess gas, ozone is generated in the former pressure dissolution tank. Since the residence time increases, the ozone concentration of the ozone water increases, and the excess gas is removed in the subsequent pressure dissolution tank, so that the ozone concentration of the ozone water increases and stabilizes.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of an ozone water producing apparatus according to the present invention. FIG. 2A is a plan view of a pressurized dissolution tank used in the ozone water producing apparatus shown in FIG. 1, and FIG. 2B is a side sectional view of FIG. 2A.
The same members as those in the conventional example are denoted by the same reference numerals.

FIG. 1 shows an ozone gas generation unit 1 for generating ozone gas. Reference numeral 3 denotes an ozone dissolving mechanism for mixing ozone gas and raw water (or ozone water circulated through the ozone water circulation pipe 10) supplied through a pipe (shown by a broken line) 2 with a mixing pump to dissolve ozone gas into the raw water. It is.

Reference numeral 4 denotes a pressure dissolving tank for increasing the ozone concentration by applying pressure to the ozone water from the ozone dissolving mechanism 3 and increasing the residence time of ozone. This pressurized dissolution tank 4 has a cylindrical closed container, an ozone water inlet 11 disposed on the upper surface of the closed container along a circumferential tangent, and a circumferential tangent on the lower surface of the closed container. And an ozone water outlet 12 arranged. The ozone water inlet 11 and the ozone water outlet 12 are preferably provided so as to be in contact with the side wall of the closed container and in the same direction in order to efficiently generate a vortex (FIGS. 2A and 2B). A valve (or vent) 13 is provided at the upper center of the pressurized dissolution tank as an excess gas releasing mechanism.

The ozone water outlet 12 of the pressurized dissolution tank 4 is connected to the tank 5 via a valve 6 and a pipe. A gas vent pipe 14 is provided at the upper part of the tank 5 and an ozone killer 9 is connected together with a pipe 15 connected to a valve 13 of the pressurized melting tank 4.
It is connected to the.

An ozone water circulation pipe 10 is provided between the side surface of the tank 5 and the ozone dissolving mechanism 3.

When such an ozone water producing apparatus is operated, the ozone gas generated by the ozone gas generation unit 1 is dissolved in raw water (or ozone water) by the ozone dissolution mechanism 3 and sent to the pressure dissolution tank 4. In the pressure dissolution tank 4,
While being pressurized between the ozone dissolution mechanism 3 and the valve 6, a vortex of ozone water is generated. Bubbles of excess gas generated in the pressurized dissolution tank 4 gather at the center of the vortex and float, and only the excess gas is discharged from the valve 13 to prevent cavitation. Excess gas discharged from the bubble 13 is rendered harmless by the ozone killer 9 and then exhausted.

The ozone water from which excess gas has been removed in the pressure dissolution tank 4 is stored in a tank 5. The ozone gas gradually escapes from the ozone water stored in the tank 5 to lower the ozone concentration. However, a part of the ozone water in the tank 5 is circulated to the ozone dissolving mechanism 3 through the ozone water circulation pipe 10 and the shortage of the ozone water is reduced. It is supplemented by dissolving ozone gas in ozone water.
The pressure of the circulation system is adjusted by opening and closing the pressure dissolution tank 3 and the valve 6. Therefore, according to the present apparatus, ozone water having a stable ozone concentration can be obtained.

FIG. 3 is a block diagram showing another embodiment of the ozone water producing apparatus of the present invention.

The difference from the embodiment shown in FIG. 1 is that a pressurized dissolution tank with an excess gas venting mechanism is provided between the ozone dissolution mechanism 3 and the pressure dissolution tank 4.

In the case of this apparatus, the pressure dissolving tank 4
b), the ozone retention time can be extended in the first-stage pressurizing and dissolving tank 4a, so that the ozone concentration of ozone water increases, and the excess gas is removed by the valve 13 in the second-stage pressurizing and dissolving tank 4b. The ozone concentration in water stabilizes.

[0023]

In summary, according to the present invention, the following excellent effects are exhibited.

A swirling flow of the ozone water is generated between the ozone water inlet and the ozone water outlet of the pressurized dissolving layer, and a surplus gas releasing mechanism for discharging the surplus gas in the ozone water is provided at the upper part of the pressurizing dissolving tank. In addition, it is possible to provide an ozone water producing apparatus having a stable ozone concentration.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an ozone water producing apparatus according to the present invention.

2A is a plan view of a pressurized dissolving tank used in the ozone water producing apparatus shown in FIG. 1, and FIG. 2B is a side sectional view of FIG.

FIG. 3 is a block diagram showing another embodiment of the ozone water producing apparatus of the present invention.

FIG. 4 is a block diagram of a conventional ozone water producing apparatus.

[Explanation of symbols]

 2 Ozone gas generation unit 3 Ozone dissolution mechanism 4, 4a, 4b Pressure dissolution tank 5 Tank 13 Excess gas release mechanism (valve or vent)

 ──────────────────────────────────────────────────の Continued on the front page (72) Katsuharu Yamamoto, Inventor Katsuharu Yamamoto 3-1-1-15 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries Co., Ltd.

Claims (2)

[Claims] 1. An ozone water producing apparatus for dissolving ozone gas in raw water and increasing the concentration of ozone by pressurizing in a pressurized dissolving tank so as to generate ozone water vortex in the pressurized dissolving tank. An ozone water production apparatus comprising: a water inlet and an ozone water outlet; and an excess gas release mechanism for removing excess gas in the ozone water is provided above the pressurized dissolution tank. 2. An ozone water producing apparatus for increasing ozone concentration by dissolving ozone gas in raw water and then pressurizing the ozone gas in a pressurized dissolution tank, further comprising a pressurized dissolution tank after the pressurized dissolution tank. An ozone water inlet and an ozone water outlet are provided so that a vortex flow of ozone water is generated in the pressurized dissolution tank, and an excess gas release mechanism for removing excess gas in the ozone water is provided at the upper part of the latter pressure dissolution tank. An ozone water producing apparatus, characterized in that: