JP2022052533A - Ozone liquid generation device - Google Patents

Abstract

To avoid a risk of leaking or emitting ozone gas of high concentration from a container without through a catalyst during generation of an ozone liquid, and suppress accumulation of the ozone gas of the high concentration in the container for a long time.SOLUTION: An ozone liquid generation device includes: a container part for generating an ozone liquid by generated ozone gas, and accumulating the generated ozone liquid; an ozone gas decomposition part for decomposing the ozone gas exhausted from the container part; an ozone liquid outflow part for allowing the generated ozone liquid to flow out to the outside from the container part; and a scavenging part for introducing outside air into the container part, and scavenging the ozone gas in the container mixed with outside air toward the ozone gas decomposition part.SELECTED DRAWING: Figure 1

Description

The present invention relates to an ozone liquid generator.

Ozone liquid (also called ozone water) has effects such as disinfection / sterilization, deodorization, and decolorization, and is widely used not only in the medical field but also in general life. Especially in recent years, as measures against infectious diseases such as viruses are required on a daily basis, ozone solution is a means of inactivating viruses and the like that are safe for the human body and ecosystem, have no environmental load, and have low running costs. , Has received a lot of attention.

As the ozone liquid generation method (generation device), a gas dissolution method and an electrolysis method are generally known. The gas dissolution method is a method of dissolving ozone gas generated by an ozone generator in water. For example, an ejector that circulates raw water or ozone liquid stored in a container such as a tank and is placed on the circulation path. A device for mixing ozone gas with circulating raw water or ozone liquid and dissolving the ozone gas is known (see, for example, Patent Document 1 below). Further, as an electrolysis method, a direct electrolysis method or the like is generally known in which raw water in a container such as an electrode tank is electrolyzed by an electrode and the ozone generated is dissolved in water before vaporization to generate an ozone liquid. (For example, see Patent Document 2 below).

Japanese Unexamined Patent Publication No. 2014-64982 Japanese Unexamined Patent Publication No. 2014-133191

In the above-mentioned conventional technique, when ozone liquid is generated, high-concentration ozone gas is accumulated in the gas phase portion of a container such as a tank for storing the generated ozone liquid. High-concentration ozone gas is generally released to the outside in a state of being reduced to oxygen through a manganese oxide (MnO) catalyst, but when ozone gas is stored in a container in a high-concentration state, the catalyst is used. If ozone gas leaks or flows out of the container without intervention, the risk increases, and there is a problem that the high-concentration ozone gas stored for a long time accelerates the corrosion of the inner surface of the container.

Further, the ozone liquid generation device is provided with a raw water injection flow path, a raw water or ozone liquid drainage flow path, and an ozone liquid discharge flow path generated at an appropriate concentration in a container such as a tank. The operation of the valve for opening and closing these flow paths is generally performed manually, and since the operation for opening and closing each flow path is complicated, the flow path leading to the gas phase portion in the container is mistakenly opened. As a result, there was concern about the risk of valve erroneous operation, in which high-concentration ozone gas would be released without the intervention of a catalyst.

An object of the present invention is to deal with such a situation. That is, it is necessary to avoid the risk of high-concentration ozone gas leaking or being released from the container without using a catalyst when generating ozone liquid, and to prevent high-concentration ozone gas from being accumulated in the container for a long time. Is the subject of the present invention.

In order to solve such a problem, the present invention has the following configurations.
A container part that generates ozone liquid from the generated ozone gas and stores the generated ozone liquid, an ozone gas decomposition part that decomposes ozone gas exhausted from the container part, and an ozone liquid generated from the container part to the outside. An ozone liquid generation device including an ozone liquid outflow part to be discharged and an air scavenging part for introducing outside air into the container part and sweeping the ozone gas in the container mixed with the outside air toward the ozone gas decomposition part.

INDUSTRIAL APPLICABILITY The present invention having such a feature can avoid the risk that high-concentration ozone gas leaks or is released from the container portion without using a catalyst in the generation of ozone liquid. In addition, it is possible to prevent high-concentration ozone gas from being accumulated in the container for a long time.

Explanatory drawing which shows an example of the ozone liquid generation apparatus which concerns on embodiment of this invention. Explanatory drawing which showed the structural example of the scavenging part in an ozone liquid generator. Explanatory drawing which shows the ozone liquid generation apparatus which concerns on other embodiment of this invention. Explanatory drawing which showed the operation flow of the water level control in a control part.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same reference numerals in different figures indicate parts having the same function, and duplicate description in each figure will be omitted as appropriate. The X, Y, and Z arrows shown in the figure indicate that the Z direction points vertically upward, the X and Y directions are vertical, and the directions are perpendicular to the Z direction.

1 to 3 show an example of an ozone liquid generator. In these examples, the above-mentioned gas dissolution method is adopted as the ozone liquid generation method, but the ozone liquid generation method itself is not particularly limited to this.

In FIG. 1, the ozone liquid generation device 1A includes a container unit 1, an ozone gas decomposition unit 2, an ozone liquid outflow unit 3, a raw water injection unit 4, a scavenging unit 5, an ozone liquid generation unit 10, and the like.

The container unit 1 is a tank or the like for storing the ozone liquid generated by the ozone liquid generation unit 10. For example, when the above-mentioned electrolysis method is adopted as the ozone liquid generation method, the container portion 1 becomes an electrolytic cell that performs electrolysis or a storage tank that stores the generated ozone liquid.

The container portion 1 is provided with an ozone liquid outflow portion 3 on the bottom surface or near the bottom portion, and a raw water injection portion 4 is provided on the upper surface or the upper surface. The ozone liquid outflow section 3 discharges the ozone liquid stored in the container section 1 to the outside, and includes a discharge flow path 30 and an ozone liquid discharge valve 31 that opens and closes the discharge flow path 30. The raw water injection unit 4 injects raw water (raw material water) into the container unit 1, and includes an injection flow path 40 and a raw water injection valve 41 that opens and closes the injection flow path.

The ozone liquid discharge valve 31 and the raw water injection valve 41 in the example shown in FIG. 1 employ a manual valve. However, when the opening / closing operation is remotely controlled, or when a water level control device described later is incorporated, an electric valve can be adopted as the ozone liquid discharge valve 31 and the raw water injection valve 41.

In the illustrated example, the ozone liquid generation unit 10 shows an example of a gas dissolution method including a circulation flow path 11. A circulation pump 12 is provided in the circulation flow path 11, and raw water stored in the container unit 1 is provided. Alternatively, the ozone liquid is circulated, and ozone gas ₍ O3 gas) is mixed and dissolved in the circulating raw water or the ozone liquid via the ejector 13 arranged in the circulation flow path 11.

The operation of the ozone liquid generator 1A will be described. When generating the ozone liquid, the raw water injection valve 41 of the raw water injection unit 4 is opened, and the raw water is injected to the set water level in the container unit 1. After that, the circulation pump 12 is operated to circulate the circulation flow path 11, and the ozone gas generated by the ozone generator (not shown) is supplied to the ejector 13, and the ozone gas is supplied to the raw water or the ozone liquid flowing through the circulation flow path 11. To mix and dissolve. Then, when the ozone liquid in the container portion 1 reaches a predetermined concentration, the circulation pump 12 and the supply of ozone gas are stopped, the ozone liquid discharge valve 31 is opened, and the generated ozone liquid is discharged to the outside of the container portion 1. To discharge.

In the container portion 1 of such an ozone liquid generation device 1A, a gas phase portion G exists in the upper layer of the generated ozone liquid, and if left as it is, a high concentration ozone gas stays in the gas phase portion G. In the ozone liquid generation device 1A, the upper part (or upper surface) of the container part 1 communicates with the ozone gas decomposition part 2 via the connection flow path 20, and the ozone gas exhausted from the container part 1 is the catalyst of the ozone gas decomposition part 2. It is released to the outside in a state of being decomposed (reduced) into oxygen via (manganese oxide (MnO) catalyst).

The ozone liquid generation device 1A includes a blower 15 that pumps outside air into the container unit 1 as a scavenging unit 5. The blower 15 introduces outside air into the gas phase portion G from the upper part of the container portion 1 via the scavenging flow path 16. At this time, the introduction direction of the outside air should avoid introducing the outside air directly toward the liquid surface as much as possible so as not to promote the diffusion of the ozone gas dissolved in the ozone liquid into the gas phase portion G. Is preferable. When outside air is introduced into the gas phase portion G of the container portion 1, a high concentration of ozone gas is mixed with the outside air in the gas phase portion G, the concentration of the ozone gas decreases, and the reduced concentration of the ozone gas becomes the ozone gas decomposition unit 2. Scavenged towards.

The operation of the blower 15 may be performed continuously or intermittently during the generation of the ozone liquid. Further, it can be continuously or intermittently performed at the stage where the generation of the ozone liquid is completed and the ozone liquid is stored in the container portion 1.

According to such an ozone liquid generation device 1A, the concentration of ozone gas accumulated in the container unit 1 can be suppressed to a low level, so that the ozone gas in the container unit 1 leaks or flows out without going through the ozone gas decomposition unit 2. Even if it happens, the risk at that time can be reduced. Further, in such an ozone liquid generator 1A, since high-concentration ozone gas is not accumulated in the container portion 1 for a long time, it is possible to avoid the risk that the inner surface of the container portion 1 is corroded by the high-concentration ozone gas. can.

FIG. 2 shows a configuration example of the scavenging unit 5 described above. In this example, the container portion 1 is cylindrical, the scavenging flow path 16 of the scavenging portion 5 is connected to the container portion 1 along the outer peripheral circular tangential direction in a plan view, and the flat surface of the upper surface of the container portion 1 is formed. A connection flow path 20 connected to the ozone gas decomposition unit 2 is connected to the center of the visual view.

It is preferable that the outside air is introduced by the scavenging unit 5 from the end of the container unit 1. As shown in FIG. 2, in the case of the container portion 1 having a circular shape in a plan view, the outside air is introduced into the gas phase portion G of the container portion 1 from the upper side surface of the container portion 1 along the outer peripheral circular tangential line direction in the plan view. Then, the ozone gas accumulated in the gas phase portion G can be swept toward the ozone gas decomposition portion 2 from the connection flow path 20 which is placed on the spiral airflow and efficiently connected to the center of the plan view.

FIG. 3 shows the ozone liquid generator 1B according to another example. The ozone liquid generation device 1B includes a container unit 1, an ozone gas decomposition unit 2, an ozone liquid outflow unit 3, a raw water injection unit 4, a scavenging unit 5, an ozone liquid generation unit 10, and the like, as in the above-mentioned example. Further, in the illustrated example, the drain drainage portion 6 is provided in the container portion 1. The drain drainage unit 6 includes a drainage flow path 60 that communicates with the bottom of the container unit 1 and a drainage drainage valve 61 that opens and closes the drainage flow path 60. The drain drainage unit 6 may be omitted, and the ozone liquid outflow unit 3 may be used for drainage drainage.

The ozone liquid generation device 1B includes a water level control device 50 in which the scavenging unit 5 raises and lowers the water level in the container unit 1. That is, the scavenging unit 5 of the ozone liquid generation device 1B raises or lowers the water level in the container unit 1, so that the ozone gas in the container unit 1 is scavenged toward the ozone gas decomposition unit 2.

The water level control device 50 includes a water level sensor 51 that detects the water level in the container unit 1. The raw water injection valve 41, the ozone liquid discharge valve 31, and the drain drain valve 61 are electric valves, and the control unit 52 controls the water level. By controlling the opening and closing of the raw water injection valve 41, the ozone liquid discharge valve 31, and the drain drain valve 61 while monitoring the detection result of the sensor 51, the water level in the container portion 1 is raised and lowered. In the illustrated example, the drain drain valve 61 is provided, but it may be omitted and the water level may be raised or lowered by the ozone liquid discharge valve 31 and the raw water injection valve 41.

Further, in the illustrated example, the control unit 52 controls the operation of the ozone liquid generation unit 10 in addition to controlling the water level in the container unit 1. Specifically, the control unit 52 starts the circulation pump 12, provides a concentration sensor 53 in the container unit 1 to measure the concentration of the ozone liquid, and the concentration of the ozone liquid in the container unit 1 is a desired upper limit value. Is detected and the circulation pump 12 is stopped.

In such an ozone liquid generation device 1B, by lowering the water level of the raw water or the ozone liquid in the container part 1, the outside air is introduced into the container part 1 via the ozone gas decomposition part 2, and the raw water or the raw water in the container part 1 is introduced. By raising the water level of the ozone liquid, the ozone gas in the gas phase portion G is scavenged toward the ozone gas decomposition portion 2.

When raising the water level in the container unit 1, the control unit 52 closes the ozone liquid discharge valve 31 and the drain drain valve 61 and opens the raw water injection valve 41 to inject raw water into the container unit 1. When lowering the water level in the container portion 1, the raw water injection valve 41 is closed, one or both of the ozone liquid discharge valve 31 and the drain drain valve 61 are opened, and the raw water or ozone water in the container portion 1 is discharged to the outside. Discharge.

Here, the control unit 52 sets an upper limit value (set value) of the water level and raises the water level in order to prevent the water level in the container unit 1 from rising too much, and the water level in the container unit 1 drops too much. Therefore, in order to prevent the gas phase portion G in the container portion 1 from communicating with the ozone liquid outflow portion 3 and the drain drainage portion 6 and the ozone gas from flowing out to the outside, a lower limit value (minimum water level) of a safe water level is set. The water level is falling.

In order to prevent ozone gas from leaking or flowing out from the ozone liquid outflow section 3 or the drain drainage section 6, a flow is performed in the flow path of the ozone liquid outflow section 3 or the drain drainage section 6 as shown in FIG. 1 or FIG. It is effective to provide the liquid reservoir 32 in which the path is curved in a U shape.

An operation example of the control unit 52 of the ozone liquid generation equipment 1B will be described more specifically with reference to FIG. When the operation is started (for example, the power is turned on), all the valves (raw water injection valve 41, ozone liquid discharge valve 31, drain drain valve 61) are first closed (step S01), and then the raw water injection valve 41 is opened. Then, raw water is injected into the container portion 1 (step S02). The open state of the raw water injection valve 41 is continued until the water level in the container portion 1 reaches the set water level (step S03: NO), and when the water level in the container portion 1 reaches the set water level (step S03: YES), the raw water injection valve 41 is infused. The valve 41 is closed (step S04).

Next, the ozone liquid generation unit 10 is operated (step S05). The operation of the ozone liquid generation unit 10 operates the circulation pump 12 while supplying ozone gas to the ejector 13. This operation is performed until the ozone liquid concentration detected by the concentration sensor 53 reaches a desired upper limit (step S06: NO), and when the ozone liquid concentration reaches the upper limit (step S06: YES), the circulation pump 12 or the circulation pump 12 or The ozone gas supply is stopped, and the ozone liquid generation is terminated (step S07).

After that, the ozone liquid discharge valve 31 is opened to allow the ozone liquid to flow out to the outside, thereby lowering the water level in the container unit 1 and introducing outside air into the container unit 1 via the ozone gas decomposition unit 2 ( Step S08). At this time, the outside air passes through the catalyst of the ozone gas decomposition unit 2, so that the effect of cooling and drying the catalyst can be obtained, and the function of the catalyst can be restored.

The water level drop is performed until the water level in the container portion 1 reaches the set minimum water level (step S09: NO), and when the water level reaches the minimum water level (step S09: YES), the ozone liquid discharge valve 31 is closed. , The outflow of ozone liquid is stopped (step S10). At this time, the minimum water level is set so that the gas phase portion G in the container portion 1 does not reach the outside because the water level drops too much. This makes it possible to avoid a problem that ozone gas leaks or flows out from the ozone liquid outflow section 3 and the drain drainage section 6.

After that, when the generation of the ozone liquid is restarted (step S11: YES), the process returns to step S02, and steps S02 to S10 are executed again. When the generation of the ozone liquid is not restarted (step S11: NO), the scavenging air and the gas concentration in the container portion 1 are reduced by the following operations.

That is, by opening the raw water injection valve 41 (step S12), the water level in the container portion 1 is raised by injecting raw water, and the ozone gas in the gas phase portion G is scavenged until the water level reaches the set water level (step S13: NO). Then, when the water level reaches the set water level (step S13: YES), the raw water injection valve 41 is closed (step S14). Then, by opening the drain drain valve 61 (step S15), the water level is lowered until the water level reaches the minimum water level (step S16: NO), and the outside air is introduced into the container portion 1.

In this way, after the generation and outflow of the ozone liquid is completed, the raw water is injected into the container portion 1 and the water level is repeatedly raised and lowered, so that the ozone gas concentration in the container portion 1 can be lowered. Steps S12 to S16 are repeated until the concentration drops to a predetermined ozone gas concentration (step S17: NO), and the operation ends when the concentration drops to a predetermined ozone gas concentration (step S17: YES).

As described above, the ozone liquid generation devices 1A and 1B according to the embodiment of the present invention are provided with the scavenging section 5 and introduce the outside air into the gas phase section G of the container section 1 to collect the outside air in the gas phase section G. The concentration of ozone gas can be reduced. As a result, it is possible to avoid the risk of high-concentration ozone gas leaking or being released from the container portion 1 without using a catalyst, and the high-concentration ozone gas is accumulated in the container portion 1 for a long time. It is possible to suppress the risk of corrosion of the container portion 1.

Further, in the ozone liquid generation device 1B, since the ozone gas accumulated in the container portion 1 is scavenged above and below the water level in the container portion 1, the scavenging unit 5 can be operated in an energy-saving manner, and the minimum water level is set to the water level. By performing management, it is possible to avoid the risk of ozone gas leaking or flowing out from the ozone liquid outflow section 3 and the drain drainage section 6.

Further, in the ozone liquid generation device 1B, when the scavenging unit 5 introduces the outside air into the container unit 1, the outside air is introduced through the ozone gas decomposition unit 2, so that the catalyst of the ozone gas decomposition unit 2 is used by the outside air. It can be cooled or dried, and the catalytic function can be regenerated well.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to these embodiments, and the design changes, etc. within the range not deviating from the gist of the present invention, etc. Even if there is, it is included in the present invention. Further, each of the above-described embodiments can be combined by diverting the technologies of each other as long as there is no particular contradiction or problem in the purpose and configuration thereof.

1A, 1B: Ozone liquid generator, 1: Container part,
2: Ozone gas decomposition part, 3: Ozone liquid outflow part, 4: Raw water injection part, 5: Scavenging part,
6: Drain drainage part,
10: Ozone liquid generator, 11: Circulation flow path, 12: Circulation pump,
13: Ejector, 15: Blower, 16: Sweep flow path, 20: Connection flow path,
30: Discharge flow path, 31: Ozone liquid discharge valve, 32: Liquid reservoir,
40: Injection flow path, 41: Raw water injection valve,
50: Water level control device, 51: Water level sensor, 52: Control unit, 53: Concentration sensor,
60: Drainage flow path, 61: Drainage drainage valve,
G: Gas phase part

Claims (9)

A container that generates ozone liquid from the generated ozone gas and stores the generated ozone liquid.
An ozone gas decomposition unit that decomposes the ozone gas exhausted from the container unit,
An ozone liquid outflow part that causes the generated ozone liquid to flow out from the container part, and an ozone liquid outflow part.
An ozone liquid generator including an air scavenging unit that introduces outside air into the container unit and scavengs the ozone gas in the container mixed with the outside air toward the ozone gas decomposition unit. The ozone liquid generation device according to claim 1, wherein the scavenging unit includes a blower for pumping outside air into the container unit. The ozone liquid generator according to claim 2, wherein the blower is an ozone liquid generator that introduces outside air into the gas phase portion of the container portion. The ozone liquid generator according to claim 3, wherein the blower introduces outside air into the container from the upper part of the container. The scavenging unit is provided with a water level control device for raising and lowering the water level in the container unit. By lowering the water level in the container unit, outside air is introduced into the container unit, and by raising the water level in the container unit, the container unit is used. The ozone liquid generator according to claim 1, wherein the ozone gas in the unit is scavenged. The ozone liquid generation device according to claim 5, wherein the scavenging unit introduces outside air into the container unit via the ozone gas decomposition unit. The water level control device is
A water level sensor that detects the water level in the container and
A raw water injection valve that opens and closes the injection flow path for injecting raw water into the container.
An ozone liquid discharge valve that opens and closes the discharge flow path of the ozone liquid outflow portion,
The ozone liquid generator according to claim 5 or 6, further comprising a control unit for opening and closing the raw water injection valve and the ozone liquid discharge valve while monitoring the detection result of the water level sensor. The ozone liquid generation device according to claim 7, wherein the control unit closes the ozone liquid discharge valve when the water level in the container unit reaches the minimum water level. The ozone liquid generating device according to any one of claims 1 to 8, wherein the ozone liquid outflow portion is provided with a liquid reservoir portion in the piping of the discharge flow path.

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