JP2002307053A - Ozone water producing apparatus, and gas-liquid separator thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make an ozone water not substantially containing undissolved ozone gas producible by enhancing defoaming effect in a gas-liquid separator (4) of ozone water producing apparatus and to reduce the restriction of use quantity though the apparatus is made small-sized and simple. SOLUTION: In the gas-liquid separator (4) of an ozone water producing apparatus constituted so that a mixed stream of raw water and ozone gas flows spirally in an ozone water tank (10), an air bubble catching surface (21) comprising a fine uneven surface or the like, is provided in the ozone water tank (10).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-liquid separator for separating undissolved ozone gas contained in ozone water from ozone water in an ozone water generator for generating ozone water by mixing ozone gas and raw water. It is about.

[0002]

2. Description of the Related Art Conventionally, an ozone water generating apparatus has been used, for example, in equipment that performs sterilization, disinfection, deodorization, etc. by utilizing the oxidizing action of ozone. Ozone water generator (1)
As shown in FIG. 1, for example, an ozone generator (ozonizer) (2) for generating ozone gas and an ejector (3) for mixing ozone gas with raw water to generate ozone water
And a gas-liquid separator (4) that separates undissolved ozone gas contained in the ozone water from the ozone water, and decomposes the waste ozone gas separated from the ozone water into oxygen by the gas-liquid separator (4). A catalyst device (5) is provided, and these devices are connected by piping. The ozone water generator (1) supplies the ozone water from which the ozone gas has been removed by the gas-liquid separator (4) to applications such as sterilization, and releases the oxygen generated by the catalyst device (5) to the outside air. It is configured to be.

As this gas-liquid separator, for example, Japanese Patent Application Laid-Open
Japanese Patent Application Laid-Open No. -202247 discloses a configuration in which ozone water supplied from an ejector flows into an ozone water storage chamber having a circular cross section in a tangential direction of an inner wall to generate a swirling flow. In the gas-liquid separator of this publication, the undissolved ozone gas mixed in a bubble state in the ozone water is floated and defoamed by the centrifugal action of the swirling flow, and this is discharged as surplus ozone.

[0004]

However, even when defoaming is performed by centrifugation, undissolved ozone gas may be contained in the ozone water flowing out of the gas-liquid separator. For this reason, it is desirable to further improve the gas-liquid separation performance of the gas-liquid separator to sufficiently remove the undissolved ozone gas from the ozone water and then use the ozone gas in applications such as sterilization.

On the other hand, a method is known in which ozone water is temporarily stored in another tank, and sufficient ozone gas is degassed for a sufficient time, but in this case, the apparatus becomes complicated and large. In addition, there is a problem that it is difficult to use a large amount of ozone water at any time (use amount is limited).

The present invention has been made in view of the above problems, and has as its object to enhance the gas-liquid separation effect in a gas-liquid separator of an ozone water generating apparatus to reduce undissolved ozone gas. An object of the present invention is to make it possible to generate ozone water substantially free of water, and to reduce the amount of use while reducing the size and the structure of the apparatus.

[0007]

According to the present invention, the undissolved ozone gas in the ozone water is captured and floated while the ozone water flows spirally in the ozone water tank (10).

[0008] Specifically, a solution taken by the present invention is to provide an ozone water tank (10) in the form of a vertical cylindrical container.
0), an inlet (1) for supplying a mixed flow of raw water and ozone gas.
4), an outlet (15) for discharging ozone water, and an ozone water generator (16) for discharging undissolved ozone gas.

[0009] In the gas-liquid separator according to the first solution, the inflow direction of the mixed flow from the inflow port (15) is determined so that the mixed flow spirally flows in the ozone water tank (10). In addition, the ozone water tank (10) is characterized in that a bubble capturing means (21) for capturing undissolved ozone gas in the ozone water is provided. In addition, the ozone water tank (10) may be a polygonal cylindrical shape or the like. In other words, the specific shape is not limited to the cylindrical shape as long as it is substantially cylindrical.

In the first solution, when the mixed flow of the raw water and the ozone gas flows into the ozone water tank (10) from the inflow port (14), it flows vertically in a spiral shape, that is, while turning. Most of the undissolved ozone gas contained in the ozone water is concentrated in the central part of the ozone water tank (10) by centrifugation, but a part of the undissolved ozone gas is not separated by the centrifugation, and the ozone water tank (10 Move outward from the center of). Here, inside the ozone water tank (10), a bubble capturing means (21) for capturing undissolved ozone gas is provided. Therefore, the undissolved ozone gas that has not been separated by the centrifugal separation and has moved to the outer periphery of the ozone water tank (10) together with the ozone water comes into contact with the bubble capturing means (21) and is captured. When a large number of these bubbles gather, they increase in buoyancy and float on the water surface, and are separated from the ozone water. After the ozone gas which floats is discharged from the ozone gas outlet (16), it can be reduced to oxygen by a catalyst device or the like and released into the outside air.

[0011] The second solution taken by the present invention is:
The first aspect of the invention is characterized in that the bubble trapping means is constituted by a bubble trapping surface (21) composed of a fine uneven surface.

Further, a third solution taken by the present invention is:
The second solving means is characterized in that the bubble trapping surface (21) is constituted by a mesh (21).

In the second and third means,
Ozone gas that is not separated from the ozone water by the centrifugal action moves to the outer periphery of the ozone water tank (10) while being contained in the ozone water, and has a bubble trapping surface having fine irregularities such as a net-like body (21). Captured in contact with (21). Then, a large number of these bubbles gather and float on the water surface, and are separated from the ozone water. The ozone gas that has floated can be discharged from the ozone gas outlet (16) and then reduced to oxygen by a catalyst device or the like and released into the outside air, similarly to the first solution.

A fourth solution taken by the present invention is:
In the first, second or third solution, the ultrasonic oscillator (23) for applying ultrasonic vibration to the mixed flow of the raw water and the ozone gas is provided in the ozone water tank (10). And

According to this structure, the bubbles of the undissolved ozone gas are crushed by the positive pressure energy of the ultrasonic wave together with the cavitation generated by the ultrasonic vibration, so that the defoaming is reliably performed. In addition, since the gas-liquid mixing action by the longitudinal wave of the ultrasonic wave can be obtained, the concentration of ozone water can be increased.

A fifth solution taken by the present invention is:
In the first solution, the ultrasonic oscillation for applying ultrasonic vibration to the mixed flow of the raw water and the ozone gas is provided in the ozone water tank (10) instead of the bubble trapping means (21) inside the ozone water tank (10). A means (23) is provided.

In the fifth solution, the first method
The undissolved ozone gas contained in the ozone water is surely separated from the ozone water by the centrifugal separation effect of the above solution and the ultrasonic defoaming operation of the fourth solution.

A sixth solution taken by the present invention is:
The inflow direction of the mixed flow from the inlet (15) is determined so that the mixed flow of the raw water and the ozone gas flows spirally in the ozone water tank (10), and the mixed water moves up and down with the fluctuation of the water level of the ozone water. The float (31) opens the ozone gas outlet (16) when the float (31) is lower than the reference position, while the ozone gas outlet (1) opens when the float (31) reaches the reference position.
On-off valve (3) interlocked with the float (31) so as to close the 6)
2) and further, inside the ozone water tank (10), a bubble capturing means (22) for capturing undissolved ozone gas in the ozone water.
Is provided.

In the sixth solution, when the water level is low and the float (31) has not reached the reference position, the on-off valve
(32) opens and the ozone gas outlet (16) opens,
Excess ozone gas is discharged outside. When the water level rises and the float (31) reaches the reference position, the on-off valve (32) closes and the ozone gas outlet (16) is closed, so that ozone water does not flow out of the ozone gas outlet (16).

Further, a seventh solution taken by the present invention is:
In the sixth solving means, the air bubble capturing means (22) is provided so as to surround the float (31), and is constituted by a bubble capturing surface (22) composed of a fine uneven surface. Features.

In the seventh solution, the air bubble capturing surface (22)
Surrounding the float (31), the bubble trapping surface (22)
Functions as rectifying means for suppressing fluctuations in water level due to the flow of ozone water around the float (31). For this reason, the wave in the ozone water tank (10) due to the swirling flow is less likely to affect the position of the float (31), so that the opening and closing of the ozone gas outlet (16) is accurately performed according to the level of the ozone water. In addition, since the bubble capturing surface (22) surrounding the float (31) captures bubbles of undissolved ozone gas, a sufficient gas-liquid separation effect can be obtained.

The eighth solution taken by the present invention is:
In the sixth or seventh solving means, the bubble trapping means
(22) includes a peripheral portion (22b) surrounding the float (31), and a bottom surface (22a) connected to the peripheral surface (22b).
(22a) is characterized in that it is formed as a conical surface or a pyramid surface that is convex downward.

Further, a ninth solution taken by the present invention is as follows.
In the above seventh or eighth means, the air bubble capturing means
(22) is characterized by being constituted by a net (22).

In the eighth and ninth means, the bottom surface (22a) of the bubble trapping means (22) is formed as a downwardly convex conical surface or a pyramidal surface. The bubbles concentrated at the center of (2) easily move to the surroundings along the conical surface or pyramidal surface of the bottom portion (22a). Then, the bubbles flow upward from the bottom surface portion (22a) of the bubble capturing means (22) along the peripheral surface portion (22b).
(16) It becomes easy to fall out.

According to a tenth aspect of the present invention, in any one of the sixth to ninth aspects,
An ultrasonic oscillator (23) for applying ultrasonic vibration to a mixed flow of raw water and ozone gas is provided in the ozone water tank (10).

According to this structure, the bubbles of the undissolved ozone gas are crushed by the positive pressure energy of the ultrasonic wave together with the cavitation generated by the ultrasonic vibration, so that the defoaming is reliably performed. In addition, since the gas-liquid mixing action by the longitudinal wave of the ultrasonic wave can be obtained, the concentration of ozone water can be increased.

According to an eleventh aspect of the present invention, in the first aspect, the bottom surface (20a) of the ozone water tank (10) moves from the peripheral portion toward the center. And a convex conical surface or a pyramid surface.

A twelfth solution according to the present invention is the solution according to any one of the first to tenth aspects, wherein the bottom surface (20a) of the ozone water tank (10) is directed from the peripheral edge toward the center. And a convex conical surface or a pyramidal surface, and the center thereof is characterized by a concave conical surface or a pyramidal surface (20c) or a plane (20d).

In the eleventh and twelfth solving means, the vertical flow of the ozone water changes in the direction along the conical surface or the pyramidal surface near the bottom surface (20a) of the ozone water tank (10). Since the bottom surface (20a) of the ozone water tank (10) is formed in a convex shape toward the center, the ozone water flows from the center to the outer periphery, and a stirring action works between the ozone water and the inner surface of the peripheral wall (11). The undissolved ozone gas that has not been centrifuged moves toward the outer periphery of the ozone water tank (10).

According to a thirteenth aspect of the present invention, in the first aspect, the bottom surface (20b) of the ozone water tank (10) extends from the peripheral portion toward the center. And a concave conical surface or a pyramid surface.

A fourteenth solution taken by the present invention is the solution according to any one of the first to tenth solutions, wherein the bottom surface (20b) of the ozone water tank (10) is directed from the periphery to the center. And a concave conical surface or a pyramid surface, and the center thereof is characterized by a convex conical surface or a pyramidal surface (20e) or a plane (20f).

In the thirteenth and fourteenth solutions, the vertical flow of the ozone water changes in the direction along the conical surface or the pyramidal surface near the bottom surface (20a) of the ozone water tank (10). Since the bottom surface (20b) of the ozone water tank (10) is formed concave toward the center, the ozone water flows from the outer periphery toward the center at the bottom of the ozone water tank (10), and the ozone water tank (10) Agitating works near the center, and air bubbles are easily collected at the center.

[0033] A fifteenth solution taken by the present invention is to provide a gas-liquid separator (o-water) for mixing ozone gas with raw water to generate ozone water and separating excess ozone gas from ozone water after generation of ozone water. The gas-liquid separator (4) is provided on the premise of an ozone water generation device provided with (4).
4. A gas-liquid separator according to any one of 4.

[0034]

According to the first and fifteenth solving means, the undissolved ozone gas contained in the ozone water is separated by spirally flowing the ozone water in the ozone water tank (10). Using the centrifugal action of ozone water, the undissolved ozone gas that has not been centrifuged is collected in the center of (10), and the bubble trapping means provided inside the ozone water tank (10).
(21). When these bubbles collect and become large, they float on the water surface and are separated from the ozone water. As described above, since the remaining air bubbles can be removed in addition to the centrifugation, the defoaming effect is enhanced. Also,
The apparatus can be made compact and simple, and there is no need for a separate tank or the like.

Further, according to the second, third and fifteenth solving means, since the bubble trapping means is constituted by the bubble trapping surface (21) such as the mesh body (21), the constitution is particularly simplified. can do.

Further, the fourth, fifth, tenth, and fifteenth
According to the solution of (1), since ultrasonic defoaming is performed in addition to defoaming by centrifugal force, it is possible to further enhance the defoaming effect.

Further, according to the sixth and fifteenth solving means, the bubbles of the ozone gas which have not been centrifuged can be captured by the bubble capturing means (22) provided in the ozone water tank (10), and the ozone water tank can be captured. The ozone gas outlet (1) changes according to the change in the position of the float (31) due to the change in the water level in (10).
6) is opened and closed to prevent ozone water from flowing out of the ozone gas discharge port (16) when the water level rises, preventing ozone water outflow while discharging ozone gas according to the level of ozone water. it can.

According to the seventh and fifteenth solving means, the float (31) is surrounded by the bubble trapping means (22), so that the position of the float (31) changes due to the influence of the ozone water wave. I try to suppress. For this reason, in the gas-liquid separator in which the swirling flow occurs, the operation of the on-off valve (32) by the float (31) accompanying the fluctuation of the water level of the ozone water is ensured, and the gas-liquid separator (4) is connected to the catalyst device (5). Thus, it is possible to reliably prevent ozone water from flowing into and wet the catalyst.

According to the eighth and fifteenth solving means, the bottom surface (22a) of the bubble trapping means (22) is formed as a downwardly convex conical surface or a pyramidal surface. Since the bubbles concentrated in the center of the ozone water tank (10) can easily escape from the ozone gas outlet (16), the bubbles are trapped by the bubble trapping means.
It is possible to prevent the float (31) from malfunctioning without accumulating in the (22).

In particular, according to the ninth and fifteenth solving means, the net (22) is used to suppress the change in the water level around the float (31), so that the structure is simplified. be able to.

According to the eleventh to fourteenth and fifteenth solutions, the ozone water has a stirring effect, so that the effect of dissolving the undissolved ozone gas by gas-liquid mixing can be enhanced. According to the eleventh, twelfth, and fifteenth solutions, the undissolved ozone gas that has not been centrifuged collects at the peripheral portion by the centrifugal action of the ozone water and floats on the water surface. Can be In addition, thirteenth, fourteenth,
According to the fifteenth solution, the ozone water flows from the outer periphery to the center at the bottom of the ozone water tank (10), and the bubbles are easily collected at the center, so that the centrifugal action is enhanced.

[0042]

Embodiment 1 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, the overall configuration of the ozone water generating apparatus of the present embodiment will be described with reference to FIG. This ozone water generator (1) is an ozone generator (ozonizer) (2)
, An ejector (3), a gas-liquid separator (4), and an ozone decomposition catalyst device (5), and each device is connected by piping.

The ozone generator (2) is for generating ozone gas from a source gas containing oxygen. The ozone generator
(2) is, for example, to apply a high-frequency high voltage of several Kv to an electrode plate disposed in the flow path of the raw material gas to generate a creeping discharge,
It is configured to ozone oxygen in the source gas around the discharge section.

This ozone generator (2) is an ozone gas pipe.
It is connected to the ejector (3) via (P1). In the ejector (3), raw water is supplied from a water supply pipe (P2) connected to one end, and the other end is connected to a gas-liquid separator (4) via an ozone water pipe (P3). . This ejector (3)
The ozone gas pipe (P1) is connected to a place where the flow velocity of the raw water is increased by squeezing the flow path of the pressurized raw water inside. It is to be mixed and dissolved.

The gas-liquid separator (4) separates the excess ozone gas not dissolved in the ozone water from the ozone water, flows the separated ozone water into the ozone water supply pipe (P4), and separates the ozone water. Discharge waste ozone gas from waste ozone gas pipe (P5). This waste ozone gas pipe (P5) is connected to an ozone decomposition catalyst device (5). The ozone decomposition catalyst device (5)
It is configured to decompose waste ozone gas under a catalyst and reduce it to oxygen, and to release this oxygen as exhaust gas into the outside air.

Next, the specific structure of the gas-liquid separator (4) will be described. FIG. 2 shows the structure of the ozone water tank (10), FIG. 2 (a) is a longitudinal sectional view, and FIG. 2 (b) is BB of FIG. 2 (a).
FIG. 2C is a sectional view taken along line C of FIG. 2A.

The gas-liquid separator (4) has a vertical cylindrical container-shaped ozone water tank (10) as a main body. The ozone water tank (10) has a cylindrical peripheral wall (11) and an upper wall (12) for closing the upper end of the peripheral wall (11).
And a bottom wall (13) for closing the lower end of the peripheral wall (11). On the peripheral wall (11) of this ozone water tank (10),
An inlet (14) for supplying a mixed flow of raw water and ozone gas is formed at the upper part, and an outlet (15) for outflow of ozone water is formed at the lower part. In addition, an ozone gas outlet (16) for discharging undissolved ozone gas is provided on the upper wall (12) of the ozone water tank (10).
Are formed. The ozone gas outlet (16) is
(12) It is formed so as to penetrate the short pipe provided on the upper and lower surfaces.

The inflow pipe (17) is connected to the inflow port (14), and the outflow pipe (18) is connected to the outflow port (15). An ozone water pipe (P3) is connected to the inflow pipe (17), and an ozone water supply pipe (P4) is connected to the outflow pipe (18). In addition, waste ozone gas pipe (P5)
Are configured to be connected.

The inflow pipe (17) has an outlet end (17a) in the ozone water tank (10) substantially parallel to the tangential direction of the inner surface of the peripheral wall (11) of the ozone water tank (10), and has an outflow side. The end is arranged to be inclined downward. For this reason, the mixed flow of water and ozone flows downward spirally in the ozone water tank (10). The inflow pipe (17) is an ozone water tank
Depending on the configuration of (10), the outflow side end may be arranged so as to be inclined upward.

A fine mesh bubble filter (19) is provided inside the outflow pipe (18). This bubble filter (19) captures the undissolved ozone gas when the undissolved ozone gas is contained in the ozone water flowing out of the outflow pipe (18). The bubble filter (19)
The ozone water may be arranged at right angles to the flow direction, or may be arranged at an appropriate angle.

The bottom surface of the ozone water tank (10) (the upper surface of the bottom wall (13)) is formed by a pyramidal surface that is convex from the periphery toward the center. More specifically, an ozone water tank (10)
As shown in FIG. 3, the top surface (20a) is
An ozone water stirring member (20) that is gently inclined in a pyramid shape is provided. Note that the bottom surface of the ozone water tank (10) may be a conical surface instead of a pyramidal surface.

On the other hand, at the lower part of the ozone water tank (10), a net (21) is disposed along the inner surface thereof. This mesh (2
1) constitutes a bubble trapping surface composed of a fine uneven surface. The net-like body (21) may be provided on at least a part of a region from the inflow pipe (17) to the outflow pipe (18) on the inner surface of the ozone water tank (10). It is not limited to the lower part. For example, the reticulated body (21)
It may be provided in the middle part of the ozone water tank (10), or may be provided in the whole ozone water tank (10). In addition, the mesh (2
1) is not necessarily along the inside of the ozone water tank (10),
It may be provided inside the ozone water tank (10).

The gas-liquid separator (4) includes a float type opening / closing mechanism (30) for opening / closing the ozone gas outlet (16). The opening / closing mechanism (30) of the ozone gas outlet (16) is a float (31) formed of a material having a lower specific gravity than water so as to move up and down with a change in the level of the ozone water in the ozone water tank (10). When the float (31) is lower than the reference position, the ozone gas discharge port (16) is opened, while when the float (31) reaches the reference position, the ozone gas discharge port (16) is closed. ) And an on-off valve (32) interlocking therewith. FIG. 2 shows a state in which the ozone gas outlet (16) is opened.

The on-off valve (32) is plate-shaped, and one end is swingably connected to the ceiling surface (the lower surface of the upper wall (12)) of the ozone water tank (10) via a connecting portion (32a). The end is connected to the float (31), and when the float (31) rises to a predetermined position (reference position), the ozone gas outlet (16) is closed. The on-off valve (32) is provided with a valve body (33) that closes the ozone gas outlet (16) when the float (31) rises to a predetermined position. The valve (33) is made of a material such as rubber or resin, and has an ozone gas outlet (16).
The ozone gas outlet (16) is configured to be securely sealed by being in close contact with the ozone gas outlet.

Around the opening / closing mechanism (30), a float formed by waving ozone water around the float (31) is used.
Rectifying means (22) for suppressing the vertical movement of (31) is provided. The rectifying means is a mesh body disposed around the float (31).
(22). This net (22) is a float
It comprises a bottom part (22a) located below (31) and a peripheral part (22b) located around the float (31). And the net (22) cancels the wave of ozone water,
The fluctuation of the position of the float (31) due to the wave is suppressed. The bottom portion (22a) is disposed at a position where the float (31) is supported from below when the level of the ozone water is low.

-Operating operation- Next, this ozone water generating apparatus
The operation during the operation (1) will be specifically described.

First, during operation, in the ozone generator (2), ozone gas is generated from the oxygen-containing source gas by discharge at an electrode plate provided in the source gas flow path.
On the other hand, raw water is supplied under pressure to the ejector (3), and the ozone gas is sucked from the ozone generator (2) when the raw water passes through the throttle of the ejector (3). Ozone gas is sucked into the ejector (3) via the ozone gas pipe (P1).

In the ejector (3), the ozone gas is formed into fine foams, mixed with the raw water, and dissolved to produce ozone water. The ozone water generated by the ejector (3) is supplied to the gas-liquid separator (4) from the ozone water pipe (P3) together with the undissolved ozone gas contained therein. The gas-liquid separator (4) removes excess ozone gas not dissolved in ozone water, and supplies ozone water substantially free of undissolved ozone gas from the ozone water supply pipe (P4) to applications such as sterilization. Then, the removed waste ozone gas is supplied from the waste ozone gas pipe (P5) to the ozone decomposition catalyst device (5). The ozone decomposition catalyst device (5) reduces ozone gas to oxygen under a catalyst, and releases the oxygen as exhaust gas to the outside air.

Next, the operation of the gas-liquid separator (4) will be described in detail.

The gas-liquid separator (4) according to the first embodiment has a gas-liquid separation function of separating a part of the excess ozone gas not dissolved in the ozone water from the ozone water, while converting the remaining excess ozone gas into the ozone water. It also has a gas-liquid mixing function for dissolving in water.

Specifically, the gas-liquid separator of the first embodiment
In (4), the blowing direction of the inflow pipe (17) is changed to the ozone water tank (1).
The mixed flow of the raw water and the ozone gas flows into the ozone water tank (10) from the inlet (14) because the tip is inclined downward substantially parallel to the tangential direction of the inner surface of the peripheral wall (11) of (0). Then, instead of a simple swirling flow, the water flows spirally in the ozone water tank (10). That is, the mixed flow also flows in the axial direction (vertical direction) of the swirling flow while becoming a swirling flow.
For this reason, a defoaming function in which the centrifugal separation acts on the bubbles of the undissolved ozone gas due to the action of the swirling component of the flow in the spiral direction, and the bubbles gather and coalesce and float at the center of the ozone water tank (10). On the other hand, the mixing function of stirring the ozone water is generated by the action of the vertical (downward) component of the flow in the spiral direction, and the dissolution of the undissolved ozone gas is promoted.

Further, the bottom surface of the ozone water tank (10) has a pyramidal surface (or conical surface) projecting upward from the peripheral edge toward the center.
(20a), the central part of the ozone water tank (10) changes its direction so that the downward flowing ozone water flows radially outward along the pyramidal surface (conical surface), and centrifugation is performed. A force is exerted to move the bubble that has not been moved to the periphery.

Further, the ozone water hits the peripheral wall (11) of the ozone water tank (10) when the direction is changed in this way, so that the stirring action works, and the effect of dissolving the ozone gas is enhanced. Furthermore, a rising liquid flow is also generated partially in the ozone water tank (10). This rising liquid flow serves to raise undissolved bubbles and enhance the defoaming effect.

From the above, in the ozone water tank (10), while ozone gas is sufficiently dissolved in ozone water,
Undissolved ozone gas is removed from the ozone water tank (1
It gathers near the center of 0) and floats as a relatively large bubble. Furthermore, in the present embodiment, the air bubbles that have not been centrifuged move to the peripheral portion due to the centrifugal action of the ozone water and are captured by the air bubble capturing surface of the mesh body (21) provided on the inner surface of the ozone water tank (10). Then, small bubbles gather and float.

On the other hand, in the gas-liquid separator (4), when the water level of the ozone water is low, the float (31) rests on the bottom portion (22a) of the net (22) of the rectifying means (22). And has not reached the reference position. At this time, since the on-off valve (32) is open and the ozone gas outlet (16) is open, surplus ozone gas is discharged from the ozone water tank (10) and flows toward the ozone decomposition catalyst device (5). When the water level rises, the float (31) also rises. When the float (31) reaches the reference position, the on-off valve (32) closes and the ozone gas outlet (16) is closed, so that ozone water does not flow out of the ozone gas outlet (16).

Regarding the operation of the opening / closing mechanism (30), a net (22) is provided as a rectifying means, and the wave in the ozone water tank (10) due to the swirling flow and the axial flow affects the position of the float (31). The opening and closing of the ozone gas discharge port (16) is accurately performed according to the level of the ozone water because it is made difficult.

According to the first embodiment, the bubbles of the undissolved ozone gas are gathered and united near the center of the ozone water tank (10) by the centrifugal action due to the swirling component of the spiral flow of the ozone water. While emerging
The action of stirring the ozone water by the downward component also occurs to promote the dissolution of the undissolved ozone gas, so that both the defoaming effect by gas-liquid separation of the undissolved ozone gas and the dissolving effect by gas-liquid mixing are enhanced. In addition, since these effects can be obtained simply by turning the inflow pipe (17) downward along the tangential direction of the peripheral wall (11) of the ozone water tank (10), dissolution and defoaming of ozone gas are performed. There is no need to add dedicated components to the device, and the configuration does not become complicated.

Further, since the bottom surface of the ozone water tank (10) is formed in a pyramid shape, ozone water flows outward from the center at the bottom portion in the ozone water tank (10), and bubbles that have not been centrifuged are separated from the ozone water tank. It flows to the periphery of (10), gathers and unites, and floats on the water surface. In particular, since the collection and coalescence of bubbles are promoted by providing the mesh body (21) on the inner surface of the peripheral wall (11) of the ozone water tank (10), a high defoaming effect can be obtained. In addition, since the agitating action also works by making the bottom surface of the ozone water tank (10) into a pyramid shape, the effect of dissolving undissolved ozone gas by gas-liquid mixing can be enhanced.

Further, a bubble filter (19) is provided in the outflow pipe (18).
The bubble filter (19) traps bubbles even inside the outflow pipe (18), so that ozone water can be reliably prevented from flowing out while containing bubbles of undissolved ozone gas. .

In the first embodiment, the ozone water tank (1
In the configuration in which the ozone gas outlet (16) is opened and closed using the change in the position of the float (31) due to the change in the water level in (0), when the water level rises, the ozone water flows out of the ozone gas outlet (16). I try not to. Therefore, despite the simple structure using the float (31), the ozone water does not flow from the gas-liquid separator (4) to the catalyst device (5), and the catalyst is wetted by the ozone water. Therefore, the possibility of failure of the catalyst device (5) is reduced.

Further, while generating a spiral flow in the ozone water in order to obtain the gas-liquid separation effect and the gas-liquid mixing effect, the rectification means (22) is used to cancel the waves around the float (31). Since the change in the position of the float (31) is suppressed, the operation of the on-off valve (32) by the float (31) can be ensured. In addition, since the water level change around the float (31) is suppressed by using the net (22) as the rectifying means, the configuration can be prevented from becoming complicated. And thus, the on-off valve by the float (31)
Since the operation of (32) is made possible, there is no need for electronic control of a solenoid valve, a water level gauge, and the like, and there are advantages such as easy production with a simple structure and low cost.

Further, since the float (31) is disposed in the ozone water tank (10) and the rectifying means composed of the mesh body (22) is provided around the float (31), a swirling flow (spiral flow) is generated in the ozone water. Although it is a type, the ozone water tank (10) can be configured as a single cylindrical container. On the other hand, in the above-mentioned Japanese Patent Application Laid-Open No. 10-202247, a float chamber is disposed above an ozone water storage chamber, a partition wall is provided therebetween, and a communication hole is formed in the partition wall. Therefore, it is necessary to form a component having a complicated shape, which increases the cost. However, by adopting the structure of the first embodiment, the shape of the container can be simplified and the cost can be reduced.

Further, since the mesh (22) is used as the flow regulating means surrounding the float (31), air bubbles can also be captured by the mesh (22).

-Modification of Embodiment 1- (First Modification) In Embodiment 1 described above, the mesh (21) provided at the lower portion of the inner surface of the ozone water tank (10) is used as the bubble capturing means. Without providing the body (21), the net body (22), which is a rectifying means surrounding the float (31), can be used as the bubble capturing means.

In this case, the opening and closing operation of the on-off valve (32) can be performed while suppressing the fluctuation of the water level caused by the flow of the ozone water, and the air bubbles of the ozone gas that has not been centrifuged are rectified into the ozone water tank (10) as It can be captured by using the provided bubble capturing means (22). In addition, since the mesh (22) around the float (31) also serves as the mesh rectifying means and the bubble catching means, the number of components can be reduced and the configuration can be simplified.

In this modification, the net (22) provided as a rectifying means is also used for the bubble capturing means. However, a bubble capturing means may be provided separately from the rectifying means.

(Second Modification) In the first embodiment,
The upper surface (20a) of the ozone water stirring member (20) may be formed as shown in FIG. In this example, the bottom of the ozone water tank (10) (2
0a), the upper surface (20a) of the ozone water stirring member (20) is formed into a convex conical surface or a pyramid surface from the peripheral portion toward the center, and a concave conical surface or a pyramid surface is formed near the center.
This is an example in which (20c) is provided. Also, ozone water stirring member (20)
The upper surface (20a) of the surface is not a concave conical surface or a pyramidal surface (20c) near the center, but instead
(20d) may be used.

Even with such a configuration, the same effect as in the case of using the ozone water stirring member (20) of FIG. 3 can be obtained.

(Third Modification) A third modification of the first embodiment is an example in which the shape of the inflow pipe to the ozone water tank (10) is changed. That is, in the first embodiment, a circular pipe is used for the inflow pipe (17), but in this modification, a rectangular pipe having a vertically long rectangular cross section is used as shown in FIG. In FIG. 5, only the shape of the inflow pipe (17) of the ozone water tank (10) is shown.

In the illustrated rectangular tube, since the width is sufficiently smaller than the height, the thickness of the swirling flow spirally flowing along the inner wall surface of the ozone water tank (10) becomes thin, and the undissolved ozone gas Bubbles easily desorb from the ozone water. Thereby, the defoaming effect can be enhanced.

[0082]

Second Embodiment A second embodiment of the present invention is an example in which the shape of the bottom surface of the ozone water tank (10) is different from that of the first embodiment. That is, in the first embodiment, the ozone water tank
The bottom surface of (10) is formed by an upwardly convex pyramid surface (20a) or a conical surface. In the second embodiment, the ozone water tank (1
As shown in FIG. 6, the bottom surface of (0) is constituted by an ozone water stirring member (20) having an upper surface formed as a concave conical surface or a pyramidal surface (20b) downward from the periphery toward the center. ing.

With this configuration, the swirling flow flowing downward in the ozone water tank (10) is generated by the conical surface or the pyramidal surface (20).
b) By changing the direction so as to follow the ozone water tank (10)
The ozone water at the bottom of the
In the vicinity of the center of (0), the stirring action works and the bubbles are also concentrated in the center. The bubbles collect at the center and float on the water surface, thereby enhancing the gas-liquid separation action. Also,
Since the ozone water also has a stirring action, the effect of dissolving undissolved ozone gas by gas-liquid mixing can be enhanced.

-Modification of Embodiment 2-Ozone water stirring member
The upper surface (20b) of (20) may be formed as shown in FIG. In this example, the upper surface (20b) of the ozone water stirring member (20), which is the bottom surface (20b) of the ozone water tank (10), is formed into a concave conical surface or a pyramid surface from the periphery toward the center, and then In this example, a convex conical surface or a pyramidal surface (20e) is provided near the center. Also, the upper surface (20b) of the ozone water stirring member (20)
Is a convex conical surface or a pyramidal surface near the center (20e)
Instead, a plane (20f) may be used as shown by a virtual line.

Even with such a configuration, the same effect as in the case of using the ozone water stirring member (20) of FIG. 6 can be obtained.

[0086]

Embodiment 3 In Embodiment 3 of the present invention, instead of making the bottom surface of the ozone water tank (10) a conical surface or a pyramidal surface,
As shown in FIG. 8, an ultrasonic oscillator is provided at the bottom of the ozone water tank (10).
This is an example in which (23) is provided.

In this example, a high-frequency power supply (25) is connected to the ultrasonic oscillator (23) via a control unit (24), and the ultrasonic oscillator (23) is supplied with a high-frequency AC voltage so that the ultrasonic Vibration is given to ozone water.

With this configuration, the bubbles of the undissolved ozone gas are crushed by the positive pressure energy of the ultrasonic waves together with the cavitation generated by the ultrasonic vibration, so that the defoaming is reliably performed. Therefore, in addition to the gas-liquid separation by centrifugal force, the effect of the ultrasonic degassing can further enhance the gas-liquid separation effect. In addition, the longitudinal wave can also enhance the gas-liquid mixing effect.

Although FIG. 8 shows a configuration in which the mesh (21) as a bubble trapping surface is provided and the ultrasonic oscillator (23) is provided, when the ultrasonic oscillator (23) is provided, the mesh ( Two
The bubble capturing surface (bubble capturing means) such as 1) may not be provided.

The ultrasonic oscillator (23) has the inside of the ozone water tank according to the first or second embodiment (FIG. 3, FIG. 4, FIG. 6, FIG. 7) having a bottom surface (other than the bottom surface in this case). May be provided.

[0091]

Fourth Embodiment A fourth embodiment of the present invention is an example in which the rectifying means has a different configuration from that of the first embodiment. As shown in FIG. 9, the rectifying means (22) is formed of a net like the first embodiment, and has a peripheral surface portion (22b) surrounding the float (31).
And a bottom surface portion (22a) connected to the peripheral surface portion (22b),
The bottom surface (22a) is located below the float (31), and the peripheral surface (22b) is located around the float (31). In the fifth embodiment, the bottom surface (22a) of the net body (22) is formed as a downwardly convex conical surface or pyramid surface.

With this structure, the ozone water wave is canceled by the net body (22) to suppress the position fluctuation of the float (31) due to the wave, and the ozone water tank (10) is conically separated. Bubbles concentrated in the central portion are easily moved from the conical surface or the pyramidal surface of the bottom portion (22a) to the periphery. For this reason, air bubbles move from the bottom surface (22a) of the rectifying means (22) to the peripheral surface (2).
2b) flows upward, so the ozone gas outlet (16)
It is easy to escape from. Therefore, it is possible to prevent the float (31) from malfunctioning due to accumulation of bubbles.

[0093]

Fifth Embodiment A fifth embodiment of the present invention is an example in which the opening / closing mechanism (30) of the ozone gas discharge port (16) and the rectifying means (22) are different from those of the first embodiment.

As shown in FIG. 10, in the fifth embodiment, the mesh body (22) of the rectifying means (22) is arranged in the center of the ozone water tank (10) as a vertically long cylindrical shape. Bottom (22
a) A vertically long float (31) is placed on top of it and stored. In this example, an ozone gas outlet (16) is formed at the center of the ceiling surface of the ozone water tank (10), and a valve body fitted with the ozone gas outlet (16) is formed on the upper surface of the float (31).
(33) is formed.

This example is a configuration example in which the on-off valve (32) of the first embodiment is integrated with the float (31). Even in this case, as in the first embodiment, the ozone gas is adjusted according to the level of the ozone water. The outlet (16) can be opened and closed. In addition, since the ozone water wave can be canceled by the mesh body (22), the ozone water can be swirled (spiral flow). The opening and closing of the ozone gas outlet (16) according to the fluctuation of the water level can be performed accurately.

[0096]

Sixth Embodiment A sixth embodiment of the present invention is an example in which the opening / closing mechanism (30) of the ozone gas outlet (16) is further different.

As shown in FIG. 11, in the sixth embodiment, a vertically long float chamber (34) is provided on the side of the ozone water tank (10), and the upper and lower ends of the float chamber (34) are connected to the ozone water tank ( Ten)
To communicate with the inside. In the float chamber (34), a float (31) having a slightly smaller cross-sectional shape than the float chamber (34) is stored, and the ozone gas outlet (16) is opened and closed by a plate-like on-off valve (32). I have. The on-off valve (32) has substantially the same configuration as that of the first embodiment, and includes a valve body (33) for closing the ozone gas outlet (16). In this example, the float chamber (34) is provided on the side of the ozone water tank (10), and the water level in the float chamber (34) does not substantially change due to the ozone water wave in the ozone water tank (10). The float chamber (34) is not provided with a net. That is, in this case, the arrangement of the float chamber (34) itself is a rectifying means for canceling the wave of the ozone water.

Also in this configuration, the ozone gas outlet (16) can be opened and closed according to the level of the ozone water as in the first embodiment, so that the backflow of the ozone water from the ozone gas outlet (16) can be reliably prevented.

[0099]

Other Embodiments of the Invention The present invention may be configured as follows with respect to the above embodiment.

For example, in the first embodiment shown in FIG.
The bubble trapping surface may be made of a raised material or the like in addition to the mesh (21).

Further, the inflow pipe (17) is not limited to a circular pipe or a rectangular pipe, and may be a nozzle of another shape.

In the first embodiment, the rectifying means
Instead of the net member (22), as shown in FIG. 12, it may be constituted by an annular flange portion (26a) and a cylindrical body (26b) fixed to the flange portion (26a). This rectification means (26)
The cylindrical body (26b) is disposed in the ozone water tank (10) so as to surround the float (31), and has a flange (2).
6a) is fixed to the lower surface of the upper wall (12) of the ozone water tank (10).
In the cylindrical body (26b), four slits (26c) are equally formed at 90 ° intervals along the axial (vertical) center line of the cylindrical body (26b).

As described above, even when the rectifying means (26) having the cylindrical body (26b) having the slit (26c) is used, it is possible to suppress the wave of the ozone water flowing spirally in the ozone water tank (10). Therefore, as in the first embodiment, the operation of the on-off valve (32) can be ensured by suppressing useless vertical movement of the float (31).

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an ozone water generation device according to a first embodiment of the present invention.

2 (a) is a longitudinal sectional view, FIG. 2 (b) is a sectional view taken along the line BB of FIG. 2 (a), and FIG. 2 (c) is a view showing a sectional structure of the gas-liquid separator. FIG. 2A is a view in the direction of arrow C in FIG.

FIG. 3 is an external view of an ozone water stirring member provided on a bottom surface of the gas-liquid separator of FIG. 2;

FIG. 4 is a cross-sectional view illustrating an ozone water stirring member of a gas-liquid separator according to a modification of the first embodiment.

FIG. 5 is a partial cross-sectional view showing an inflow pipe of a gas-liquid separator according to a modification of the first embodiment.

FIG. 6 is a sectional view showing an ozone water stirring member of the gas-liquid separator according to Embodiment 2 of the present invention.

FIG. 7 is a cross-sectional view illustrating an ozone water stirring member of a gas-liquid separator according to a modification of the second embodiment.

FIG. 8 is a longitudinal sectional view of a gas-liquid separator according to Embodiment 3 of the present invention.

FIG. 9 is a sectional view showing a rectifying unit of a gas-liquid separator according to Embodiment 4 of the present invention.

FIG. 10 is a sectional view showing a rectifying unit of a gas-liquid separator according to Embodiment 5 of the present invention.

FIG. 11 is a longitudinal sectional view of a gas-liquid separator according to Embodiment 6 of the present invention.

FIG. 12 is a cross-sectional view showing a modification of the rectification means.

[Explanation of symbols]

 (1) Ozone water generator (2) Ozone generator (3) Ejector (4) Gas-liquid separator (5) Ozone decomposition catalyst device (10) Ozone water tank (11) Perimeter wall (12) Top wall (13) Bottom wall (14) Inlet (15) Outlet (16) Ozone gas outlet (17) Inlet pipe (18) Outlet pipe (19) Bubble filter (20) Ozone water stirring member (20a) Top surface (20b) Top surface (20c) Pyramid Plane or conical surface (20d) Plane (20e) Pyramidal or conical surface (20f) Plane (21) Net (bubble trapping surface) (22) Net (rectifying means) (22a) Bottom part (22b) Peripheral part ( 23) Ultrasonic oscillator (24) Controller (25) High frequency power supply (26) Rectifier (26a) Flange (26b) Cylindrical body (26c) Slit (30) Open / close mechanism (31) Float (32) Open / close valve (33 ) Valve (34) Float chamber

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B01F 1/00 B01F 1/00 A C02F 1/78 C02F 1/78 // C01B 13/10 C01B 13/10 DF term (reference) 4D011 AA01 AA05 AA18 AB03 AC01 AC03 AD02 AD03 BA08 4D037 AA01 BA23 BA26 CA12 4D050 AA01 AB04 AB06 BB02 BD04 4G035 AA01 AE13 4G042 CE01

Claims (15)

[Claims] 1. An ozone water tank (10) having a vertical cylindrical container shape, an inlet (14) for supplying a mixed flow of raw water and ozone gas to the ozone water tank (10), and a flow for flowing out ozone water. exit
(15) and an ozone gas outlet for discharging undissolved ozone gas
(16) is a gas-liquid separator of the ozone water generating apparatus, wherein the mixed flow from the inflow port (15) inflow direction from the inlet (15) so that the mixed flow spirally in the ozone water tank (10) The gas-liquid separator of the ozone water generation device is provided with a bubble trapping means (21) for trapping undissolved ozone gas in the ozone water inside the ozone water tank (10). . 2. The gas-liquid separator of an ozone water generation apparatus according to claim 1, wherein the bubble trapping means is constituted by a bubble trapping surface (21) comprising a fine uneven surface. 3. A gas-liquid separator for an ozone water generating apparatus according to claim 2, wherein the bubble trapping surface (21) is constituted by a mesh (21). 4. An ozone water tank (10) is provided with an ultrasonic oscillator (23) for applying ultrasonic vibration to a mixed flow of raw water and ozone gas.
A gas-liquid separator for the ozone water generator according to the above. 5. An ozone water tank (10) having a vertical cylindrical container shape, an inlet (14) for supplying a mixed flow of raw water and ozone gas to the ozone water tank (10), and a flow for flowing out the ozone water. exit
(15) and an ozone gas outlet for discharging undissolved ozone gas
(16) is a gas-liquid separator of the ozone water generating apparatus, wherein the mixed flow from the inflow port (15) inflow direction from the inlet (15) so that the mixed flow spirally in the ozone water tank (10) And an ozone water tank (10) is provided with an ultrasonic oscillator (23) for applying ultrasonic vibration to the mixed flow of the raw water and the ozone gas. Separator. 6. An ozone water tank (10) having a vertical cylindrical container shape, an inlet (14) for supplying a mixed flow of raw water and ozone gas to the ozone water tank (10), and a flow for flowing out the ozone water. exit
(15) and an ozone gas outlet for discharging undissolved ozone gas
(16) is a gas-liquid separator of the ozone water generating apparatus, wherein the mixed flow from the inflow port (15) inflow direction from the inlet (15) so that the mixed flow spirally in the ozone water tank (10) Float (31) that moves up and down as the level of ozone water fluctuates
When the float (31) is lower than the reference position, the ozone gas discharge port (16) is opened, and when the float (31) reaches the reference position, the ozone gas discharge port (16) is closed. (31) and an on-off valve (32) interlocked therewith, and inside the ozone water tank (10), a bubble capturing means (22) for capturing undissolved ozone gas in the ozone water is provided. Gas-liquid separator for ozone water generator. 7. The air bubble trapping means (22) is provided so as to surround the float (31), and is constituted by a bubble trapping surface (22) composed of a fine uneven surface. A gas-liquid separator for an ozone water generating apparatus according to claim 6. 8. The air bubble capturing means (22) includes a peripheral part (22b) surrounding the float (31) and a bottom part (22a) connected to the peripheral part (22b). 8. The gas-liquid separator for an ozone water generation apparatus according to claim 6, wherein the is formed as a conical surface or a pyramid surface having a downward convex shape. 9. A gas-liquid separator for an ozone water generating apparatus according to claim 7, wherein the bubble trapping means (22) is constituted by a mesh (22). An ultrasonic oscillator (23) for applying ultrasonic vibration to a mixed flow of raw water and ozone gas in an ozone water tank (10).
The gas-liquid separator of the ozone water generator according to any one of claims 6 to 9, further comprising: 11. The ozone water tank (10) according to claim 1, wherein the bottom surface (20a) of the ozone water tank (10) is formed by a conical surface or a pyramid surface that is convex from the peripheral edge toward the center. 2. A gas-liquid separator of the ozone water generator according to 1. 12. A bottom surface (20a) of the ozone water tank (10) is formed by a convex conical surface or a pyramidal surface from the peripheral portion toward the center, and a concave conical surface or a pyramidal surface near the center thereof.
The gas-liquid separator for an ozone water generator according to any one of claims 1 to 10, wherein the gas-liquid separator is constituted by (20c) or a plane (20d). 13. The ozone water tank (10), wherein a bottom surface (20b) of the ozone water tank (10) is formed by a concave conical surface or a pyramid surface from a peripheral portion toward the center. A gas-liquid separator for the ozone water generator according to the above. 14. A bottom surface (20b) of an ozone water tank (10) is formed of a concave conical surface or a pyramid surface from the peripheral portion toward the center, and a convex conical surface or a pyramid surface near the center thereof.
The gas-liquid separator of an ozone water generation apparatus according to any one of claims 1 to 10, wherein the gas-liquid separator is constituted by (20e) or a plane (20f). 15. An ozone water generator comprising a gas-liquid separator (4) for mixing ozone gas with raw water to generate ozone water and separating excess ozone gas from the ozone water after generation of the ozone water. The gas-liquid separator (4) according to any one of claims 1 to 14,
An ozone water generation device comprising the gas-liquid separator according to any one of the preceding claims.