JP2002346351A - Gas dissolving device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas dissolving device capable of dissolving a large amount of gas, easily adjusting a gas pressure for adjusting a water level and effectively cleaning a quality of water. SOLUTION: The gas dissolving device comprises a liquid feeding means for feeding a liquid to a closed tank; a gas feeding means for feeding a gas into the closed tank; and a baffle plate provided in the closed tank. The baffle plate is arranged so as to collide with the liquid fed from the liquid feeding means. The gas from the gas feeding means is fed into the closed tank and the gas at a space in the closed tank is conducted to a suction side or a discharge side of a pump or a line mixer to release it into the closed tank. A flocculant for aggregating a water quality contaminant or a microorganism capable of decomposing the contaminant is mixed and a means for decomposing/ disinfecting the contaminant is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas dissolving apparatus, which continuously supplies a liquid to a closed tank, dissolves the gas in the liquid while discharging the liquid, and prevents aggregation of pollutants contained in the liquid. The present invention relates to a gas dissolving apparatus for performing decomposition and sterilization.

[0002]

2. Description of the Related Art In a semiconductor process, a gas such as ozone is dissolved in a liquid such as water and used as functional water. Also, in wastewater treatment facilities and dirty rivers, lakes and marshes, the amount of dissolved oxygen in water is increased by releasing water in which gas such as air or oxygen is dissolved into water in advance, thereby increasing the activity of microorganisms. Devices for purifying sewage are known.

FIG. 20 is a schematic configuration diagram showing a conventional example described in Japanese Patent Application Laid-Open No. 11-207162. In the figure, reference numeral 1 denotes a hermetically sealed airtight tank into which water for dissolving a gas is injected, for example, for about eight minutes. Although not shown, a gas supply means such as a pump for supplying air or oxygen, a gas cylinder, or a gas generator is arranged near the closed tank. 2 is a nozzle,
The tip of this nozzle is provided in the vicinity of the outer periphery of the closed tank 1 and is arranged so as to be emitted to the water surface from obliquely above the water surface along the tangential direction.

A pump 3 functions as a liquid supply means. The pump 3 pumps water from a lake or a river 6 through a stop valve 5 and supplies the water from the nozzle 2 to the closed tank 1. Reference numeral 4 denotes a control valve, which is normally opened and releases gas-dissolved water in a closed tank to a place to be purified, but is opened and closed when the water in the closed tank 1 becomes lower than a predetermined level position. The water level is adjusted by adjusting the degree to adjust the water level, or by closing the gas control valve 4a to stop the gas supply. 5 is a stop valve for stopping the supply of water. Although not shown in the drawings, a level gauge for measuring the amount of water in the closed tank and a pressure gauge for measuring the pressure in the closed tank 1 are attached to the closed tank.

In the above configuration, a gas (eg, oxygen) pressurized to a predetermined pressure is introduced above the closed tank 1. If the pressure of the gas is high, the water level falls and the water falls below a preset water level. In this case, the gas pressure is adjusted by the gas control valve 4a so as to reach a predetermined pressure level, or the liquid control valve 4 To control the water level.

[0006]

However, in the conventional example shown in FIG. 20, the water from the nozzle 2 is emitted obliquely to the water surface, so that a vortex is generated, and the gas is dissolved by the centrifugal force. Promising but collision between water,
In other words, there is a problem that the collision pressure is not sufficiently utilized for dissolving the gas due to the collision between the liquids, and the amount of water droplets is small, and the solubility of the gas in water is not sufficiently obtained. there were.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a liquid is made to collide with a solid, thereby dissolving a gas in the liquid by the pressure of the collision, and further increasing the amount of liquid droplets and bubbles. The purpose is to effectively increase the amount of dissolved gas by causing the gas accumulated in the unsealed closed tank to be released into the liquid by guiding it to the lower part of the closed tank or the upstream or downstream of the pump and into the liquid. By circulating gas accumulated above the tank, gas dissolution efficiency is improved and controllability of gas dissolution is improved, and means for coagulating, decomposing and sterilizing liquid pollutants and pollutants are provided. It is an object of the present invention to realize a gas dissolving apparatus.

[0008]

According to the present invention, there is provided a liquid supply device for supplying a liquid to a closed tank, a gas supply device for supplying a gas, And a baffle plate provided in the closed tank, wherein the baffle plate is arranged so as to collide with the liquid supplied from the liquid supply means.

According to a second aspect of the present invention, in the gas dissolving apparatus according to the first aspect, the liquid is supplied downward from above the closed tank, and a baffle plate is disposed at a drop point of the liquid.

According to a third aspect of the present invention, in the gas dissolving apparatus according to the first or second aspect, the liquid level of the closed tank is controlled so as to maintain the flow velocity and the collision pressure of the liquid colliding with the baffle plate at a predetermined level or more. Is controlled in the range of.

According to a fourth aspect, in the gas dissolving apparatus according to any one of the first to third aspects, a plurality of irregularities are provided on a surface of the baffle plate.

According to a fifth aspect of the present invention, in the gas dissolving apparatus according to any one of the first to fourth aspects, an inclination is provided such that the vicinity of the central portion of the baffle plate is increased and gradually decreased toward the periphery. Features.

According to a sixth aspect of the present invention, in the gas dissolving apparatus according to any one of the first to fifth aspects, an inclination is provided so that the vicinity of the central portion of the baffle plate is increased and gradually reduced toward the periphery. It is characterized in that grooves or projections are provided so that the liquid colliding with the inclined surface of the baffle plate generates a vortex (swirl flow).

According to a seventh aspect of the present invention, in the gas dissolving apparatus according to any one of the first to sixth aspects, the baffle plate includes a plurality of baffle plates, and the liquid that has collided with the first baffle plate is disposed in a subsequent stage. Characterized in that they are arranged to fall while colliding with.

In a preferred embodiment, the gas supply means comprises a liquid supply means for supplying a liquid to the closed tank and a gas supply means for supplying a gas, wherein the gas is injected from the gas supply means into the closed tank, A pipe for injecting the gas from the gas supply means is provided in at least one of the front and rear stages of the liquid supply means.

According to a ninth aspect of the present invention, in the gas dissolving apparatus according to any one of the first to seventh aspects, the gas dissolving device comprises liquid supply means for supplying a liquid to a closed tank, and gas supply means for supplying a gas. A pipe for injecting the gas from the gas supply unit into the closed tank is provided at least one of a stage before and after the liquid supply unit.

According to a tenth aspect of the present invention, the apparatus further comprises a liquid supply means for supplying a liquid to the closed tank and a gas supply means for supplying a gas. A gas injection pipe is provided.

According to an eleventh aspect of the present invention, in the gas dissolving apparatus according to any one of the first to seventh aspects, the gas dissolving device comprises liquid supply means for supplying a liquid to a closed tank, and gas supply means for supplying a gas. A pipe for injecting the gas from the closed tank is provided in at least one of a preceding stage and a succeeding stage of the supply means.

In claim 12, claim 8 or claim 10
In the gas dissolving apparatus described above, the gas is supplied from above the closed tank via a nozzle.

According to a thirteenth aspect, in the gas dissolving apparatus according to the twelfth aspect, the outlet of the nozzle is arranged so as to face a tangential direction of the closed tank.

According to a fourteenth aspect of the present invention, the closed tank includes a liquid supply means for supplying a liquid to the closed tank and a gas supply means for supplying a gas. It is characterized in that it is released into the liquid in the tank.

According to a fifteenth aspect, in the gas dissolving apparatus according to any one of the first to seventh aspects, the gas dissolving device comprises a liquid supply means for supplying a liquid to a closed tank and a gas supply means for supplying a gas. The gas in the space of the tank is pressurized by pressurizing means and released into the liquid in the closed tank.

In the sixteenth aspect, a plurality of hermetically sealed tanks, a connection pipe for airtightly connecting the upper and lower portions of these hermetically sealed tanks, a liquid supply means for supplying liquid to the first hermetic tank, Gas supply means for supplying gas to any of the closed tanks, wherein a gas injection means (pipe) for injecting the gas into at least one of a preceding stage and a subsequent stage of the liquid supplying means is provided.

According to a seventeenth aspect, a plurality of hermetically sealed tanks, a connecting pipe for airtightly connecting the upper and lower portions of these hermetically sealed tanks, a liquid supply means for supplying liquid to the first-stage hermetically sealed tank, Gas supply means for supplying gas to any of the closed tanks, wherein a gas injection means (pipe) for injecting gas in the space of the closed tank into at least one of a former stage and a latter stage of the liquid supply means is provided. It is characterized by.

In claim 18, claims 1 to 17
In the gas dissolving apparatus according to any one of the above, a coagulant mixing unit that mixes a coagulant that coagulates a pollutant contained in the liquid into either or both of a pipe for supplying the liquid to the closed tank and a pipe for discharging the liquid. Is provided.

In claim 19, claims 1 to 18
In any one of the gas dissolving apparatuses according to any one of the first to third aspects, a microbial contaminant containing microorganisms that decompose pollutants or pollutants contained in the liquid is contained in a pipe for supplying a liquid to the closed tank, a pipe for discharging the liquid, or any part of the pipe. Means are provided.

In claim 20, claims 1 to 19
In the gas dissolving device according to any one of the above, at least one portion of a sealed tank constituting the gas dissolving device, a pipe for supplying a liquid to the sealed tank, or a pipe for discharging the liquid decomposes pollutants and microorganisms contained in the liquid. -It is characterized by providing disintegration / sterilization means for sterilization.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic diagram showing an example of an embodiment according to claims 1 and 2 of the present invention. In the figure, the same elements as those in FIG. 20 are denoted by the same reference numerals. 20 is different from FIG. 20 in that the emission direction of the nozzle 2 and the baffle plate 10 are provided, and that the gas injection means is provided before and after the pump (water supply means). In this embodiment, the nozzle 2 is provided near the ceiling of the closed tank in a direction perpendicular to the water surface, and the baffle 10 is disposed substantially horizontally just below the nozzle emission direction.

According to the above-described structure, the water discharged from the nozzle collides with the baffle plate 10 and the collision pressure between the water and the solid and a large amount of water droplets are generated. , Air, ozone, etc.) and fall to the water surface. In this process, water takes in gas and accumulates in the closed tank. FIG. 2 shows an example of an embodiment according to claim 3 of the present invention in which the baffle plate 10 is provided below the water surface. Depending on the force of the water spouting from the nozzle 2, the spouting water displaces the water on the surface and obstructs. Control is performed so that the depth is such that it directly collides with the plate, and a large amount of water splashes and bubbles are generated.

As shown in FIGS. 1 and 2, the pump 3
Or inject gas before the stage. If a line mixer or an injector is attached to the latter stage and oxygen is injected in advance, gas can be efficiently taken in. FIGS. 3A and 3B show an example of an embodiment according to claim 4 of the present invention, in which a plurality of irregularities are provided on the surface of a baffle plate. FIG. 3c shows an example of an embodiment according to claim 5 of the present invention, in which a central portion of the baffle plate 10 is raised to form a conical shape, and water dispersed at 360 degrees by the baffle plate is sealed in a closed tank. 1
The gas can be effectively dissolved in the water by colliding with the wall surface.

FIGS. 4A and 4B show an example of an embodiment according to claim 6 of the present invention, wherein FIG.
(B) is a front view. In this embodiment, an inclination is provided so that the vicinity of the center of the baffle plate 10 is increased and gradually decreases toward the periphery, and the liquid that has collided with the inclined surface of the baffle plate generates a vortex (swirl flow). Such grooves or projections are provided. With such a shape, the solubility of gas can be improved by the pressure generated by colliding with the baffle plate 10 and the pressure due to the centrifugal force of the vortex.

FIG. 5 shows an example of the embodiment according to claim 7, and is a structural view of a main part having a plurality of baffles.
The first baffle plate 10a is arranged at a predetermined angle (for example, 45 degrees) so that water that has collided with the first baffle plate 10a falls while further colliding with the baffle plate 10b arranged in the next and subsequent stages. The baffle 10b of the next stage is arranged substantially vertically so that most of the water that has collided with the baffle 10a
b.

By colliding the baffle 10 with water a plurality of times as described above, the gas can be more effectively dissolved in the water. At this time, the wall surface of the closed tank may be used for the second collision.

FIG. 6 is a block diagram of the present invention.
3 shows an example of an embodiment relating to FIG.
The same elements as those of 0 are denoted by the same reference numerals. In this embodiment, gas of a predetermined pressure is injected into the upper space of the closed tank 1 by a gas supply means such as a gas cylinder (not shown), and water is injected from a pump 3 which is a liquid supply means. Although not shown in the drawings, a level gauge, a pressure gauge, and the like for measuring the level are attached to the closed tank.

According to FIG. 6, the gas to be supplied to the closed tank 1 is branched and injected into the front stage of the pump 3 via the pipe 12 and the stop valve 5a, and is disposed downstream of the pump via the stop valve 5b. Into the turbulence generating section (line mixer or the like) 9. The gas to be injected into the upstream part of the pump 3 and the turbulence generating section may be removed by removing the piping portion indicated by B in the drawing, and piping the gas in the closed tank 1 as indicated by the dotted line A. Further, as shown in the drawing, the tip of the nozzle 2 may be provided in the vicinity of the outer periphery of the closed tank 1 and emitted to the water surface obliquely above the liquid surface along the tangential direction.

According to such a configuration, when the control valve 4a is closed to adjust the liquid level and the gas supplied from the gas supply means is temporarily stopped, the gas in the closed tank 1 is removed by the pump 3 or the turbulent flow. The gas flows into the generator 9 and the gas in the closed tank is circulated. As a result, fluctuations in gas solubility are reduced, and gas dissolution with high controllability is possible.

FIG. 7 shows an embodiment according to the ninth and eleventh aspects in which the baffles shown in FIGS. 3 to 5 are provided below the nozzle 2, wherein water impinges on the baffles 10 and gas is supplied to the closed tank 1. And the gas in the space of the tank is injected via a pipe 12 into the front stage of the pump 3, and the gas is injected into a line mixer 9 arranged downstream of the pump 3. The gas supplied from the gas supply means may be branched from the gas supplied to the closed tank 1 and connected to the pipe 12 as shown in FIG. According to such a configuration,
Since the gas in the upper space of the closed tank 1 is continuously circulated in order to improve the solubility by the baffle plate 10 and adjust the liquid level, even when the gas supply is temporarily stopped, the fluctuation of the gas solubility is small and efficient. And highly controllable gas dissolution is possible.

FIG. 8 shows an embodiment according to the fourteenth and fifteenth aspects of the present invention. The same elements as those in the conventional example shown in FIG. In this example, the gas in the space above the closed tank 1 is guided below the closed tank 1 by a pipe 12, is pressurized by a pump 3a, and is discharged via a diffuser plate 8 arranged below the closed tank 1. Is done. According to the above configuration, since the gas in the upper space is circulated, undissolved gas is not released to the atmosphere, and efficient gas dissolution is possible. Although the liquid from the pump 3 is injected into the liquid in the tank 1 in FIG. 8, the liquid from the pump 3 is supplied from above the tank 1 as in the case of FIG.
A baffle may be arranged below it.

FIG. 9 shows an embodiment of the present invention. In this example, two closed tanks are used, and the upper space and the lower part of these closed tanks 1a, 1b are air-tightly connected by connecting pipes 13a, 13b. In this state, the upper space of the two closed tanks and the water pressure in the closed tanks are the same. Further, the upper space of the closed tank 1b at the former stage and the latter stage of the pump 3 is connected by a pipe 12, so that the gas in the upper space is injected into the water injected by the pump 3. The gas supplied from the gas supply means may branch the gas supplied to the closed tank 1 and pipe the gas to the pipe 12 in the same manner as shown in FIG.

A baffle plate 10 is arranged at the point where water from the nozzle 2 falls in the first-stage closed tank. Even in such a configuration, the undissolved gas is circulated, and furthermore, the gas can be efficiently and highly controlled to be dissolved by the collision pressure between the baffle plate and the water and the generation of a large amount of water droplets. The latter closed tank 1b aims at improving the solubility of the gas by extending the time during which the gas-dissolved water stays in the closed tank.

By the way, when purifying water, fine contaminants in the water may be attached to the flocculant and settled or floated under pressure. Pressurized flotation generates fine bubbles,
It refers to floating by attaching this to the aggregated fine particles. FIG. 10 shows an embodiment relating to claims 18 and 19. In this embodiment, a line mixer 9 is provided at the subsequent stage of the pump 3 of the conventional device shown in FIG. 20, and an injection valve 16a is provided at the preceding stage of the pump 3. Water pollutants are supplied from an inlet at one end of the valve. A coagulant to coagulate and microorganisms that decompose pollutants are mixed. Although not shown in the figure, a closed tank for storing a flocculant and microorganisms is disposed in front of the injection valve 16a.

According to the above configuration, the coagulant and the microorganism can be supplied using the existing gas dissolving device. Then, the stirring is performed in the pump 3, the line mixer, and the closed tank 1, so that the coagulation and the pressure floating can be performed efficiently.
Further, unlike the case where the coagulant is separately supplied, the structure is simplified because the stirring means need not be provided. When the coagulant is injected, excess air is dissolved in water by a gas dissolving device so that the dissolved air becomes fine bubbles at atmospheric pressure. When injecting microorganisms, the concentration of dissolved oxygen is increased by supplying air or oxygen to a gas dissolving device to activate the microorganisms.

In the drawing, the case where the inlet is provided on the suction side of the pump 3 and the case where the inlet is provided at the outlet (inlet) from the closed tank are illustrated. It may be supplied directly. FIG. 11 shows a gas dissolving apparatus of the present invention shown in FIG. 6 in which an injection valve 16a for injecting a flocculant or microorganisms is provided in a stage preceding the pump 3. FIG. 12 shows a gas dissolution apparatus of the present invention shown in FIG. 7 in which an injection valve 16a for injecting a flocculant or microorganisms is provided at a stage preceding the pump 3. Also in this embodiment, a discharge port (injection port) from the discharge side of the pump, the inside of the closed tank, or the closed tank.
It may be directly supplied to.

Next, when water is purified, measures to be taken in the case where pollutants in the water include water moss and organic substances that cause the generation of offensive odors will be examined. In order to decompose and remove the blue-green algae generated in rivers, lakes and marshes, and the organic matter and odorous components in the water, we use electric polarization, such as tourmaline / composite semiconductor / ceramic. Catalyst technology such as titania (TiO ₂ ) which is a photocatalyst Used ones Irradiated with ultraviolet rays Some of them add ozone or chlorine.

The tourmaline is electrically polarized even in a natural state, and a weak current flows, but the degree of polarization is increased by pressure / temperature / light similarly to the composite semiconductor / ceramic. In the photocatalyst described above, light causes electric polarization. Due to this polarization, a hydroxyl group (hydroxyl) radical is generated as described above, thereby decomposing organic substances and the like. (See FIG. 13), the ultraviolet light having a wavelength of 253.7 nm is most easily absorbed by DNA (deoxyribonucleic acid) such as bacteria and viruses.
Absorbed ultraviolet light destroys DNA, halting growth and killing it. (See Fig. 14)

Then, the cell wall and cell membrane of bacteria and viruses are damaged and killed (see FIG. 14). However, chlorine is rarely used because it has a long residence time and has a large burden on the environment such as generation of by-products. On the other hand, ozone has a short residence time and hardly produces any by-products, and can be used. However, care must be taken so that it does not diffuse more than 0.1 ppm into the gas phase. Since ozone is decomposed into oxygen, ozone aeration has the effect of increasing the concentration of dissolved oxygen.

Blue-green algae occur in the upper part of rivers, lakes and marshes, and the dissolved oxygen concentration is increased by the photosynthesis in the daytime. It is anoxic water. further,
Oxygen is consumed to decompose eutrophics such as carcasses, and the water under the water layer is poorly oxygenated (almost zero).
(See FIG. 15).

Therefore, the improvement of water quality is not sufficient only by removing the blue water, and it is necessary to increase the dissolved oxygen concentration. From this point of view, the method (1) is a method in which it is expected that the concentration of dissolved oxygen will be naturally improved by removing water worms. In the method, the decomposition of ozone
It is hoped that the oxygen concentration will be improved, but it does not mean that the dissolved oxygen concentration is being positively improved. In addition, a large amount of ozone cannot be used because aeration is performed while paying attention to the concentration at which ozone diffuses from water into the air.

FIGS. 16 to 18 show an embodiment of the present invention. When water pollutants such as blue water are removed, a means for decomposing blue water and a gas dissolving device for improving the concentration of dissolved oxygen are combined. Thus, the removal of water and the supply of oxygen are performed at the same time.

FIG. 16 shows a conventional apparatus shown in FIG. 20 in which a line mixer 9 is provided downstream of the pump 3 and disposed upstream of the pump 3, in the closed tank 1 and downstream of the closed tank for decomposing and sterilizing water pollutants. The disassembly / sterilization means 15 is provided. The means 15 for decomposing and sterilizing water pollutants is not limited to the embodiment, but may be provided at one or more locations where water moves.

FIG. 17 shows a dissolving and disinfecting means 15 for dissolving and disinfecting water pollutants provided before the pump 3 of the gas dissolving apparatus of the present invention shown in FIG. 6, inside the closed tank 1 and after the closed tank. thing. FIG. 18 shows a gas dissolving apparatus according to the present invention in which a dissolving / sterilizing means 15 for decomposing / sterilizing water pollutants is provided before the pump 3, in the closed tank 1, and after the closed tank of the gas dissolving apparatus of the present invention. However, it may be provided at one or more locations where water moves as described above.

The decomposing / sterilizing means 15 for decomposing / sterilizing the water pollutant is an element (electric stone / composite semiconductor / ceramic, etc.) which causes electric polarization. Photocatalytic element such as titania (TiO ₂ ) Irradiation equipment Use an ozone supply device, etc., and install the following places.

The element which generates the electric polarization is used as a member of a baffle plate to decompose an organic substance or the like by utilizing the polarization caused by water pressure. Similarly, it may be installed in the closed tank and in the closed tank discharge section, and may be decomposed by utilizing polarization by water pressure. As shown in FIG. 19, the photocatalyst element has a photocatalyst 19 applied to the outside of the outer tube 18 of the ultraviolet ray generating means 17 to absorb ultraviolet rays and improve the catalytic function. Therefore, it is installed in the same place as the ultraviolet ray generator. In FIG. 19, a power source and a wiring for generating ultraviolet rays are omitted. Since the ultraviolet irradiation device described above only needs to have a flow of water, the ultraviolet irradiation device is installed in the closed tank 1 or at least one location on the pump suction side or the closed tank discharge port.
Ozone is supplied using the original gas supply port of the gas dissolving apparatus. According to the above configuration, the concentration of dissolved oxygen can be increased, and the water environment can be efficiently restored, such as removal of blue water and decomposition and sterilization of organic matter.

The foregoing description of the present invention has been presented by way of illustration and example only, and is given of certain preferred embodiments. In this embodiment, the gas to be dissolved is described as oxygen for the purpose of purifying lakes, but the gas to be dissolved in water is, for example, CO _2.
And various gases can be used depending on the purpose. Further, the liquid is not limited to water but may be another liquid.

Thus, it will be apparent to one skilled in the art that the present invention may have many changes and modifications without departing from its essentials. The scope of the present invention defined by the description in the claims section is intended to cover alterations and modifications within the scope.

[0056]

As described above, the gas dissolving apparatus of the present invention comprises a liquid supply means for supplying a liquid to a closed tank;
A gas supply means for supplying gas to the closed tank, and a baffle plate provided in the closed tank, the baffle plate is arranged to collide with the liquid supplied from the liquid supply means, and from the gas supply means Gas to the closed tank and the gas in the space inside the closed tank
Since it is configured to be guided to the discharge side or the line mixer and discharged to the closed tank, a high-concentration gas solution can be obtained. For example, in a semiconductor process, a gas such as ozone can be dissolved in a liquid such as water and used as functional water. In addition, since the scale of the equipment has been increased, a flocculant that aggregates water pollutants and microorganisms capable of decomposing pollutants are mixed in, and means for decomposing and sterilizing water pollutants are provided. At the same time, the water environment can be efficiently restored, such as the removal of blue water and the decomposition and sterilization of organic matter.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an example of an embodiment of a gas dissolving apparatus of the present invention.

FIG. 2 is a configuration diagram showing another embodiment of the gas dissolving device.

FIG. 3 is a configuration diagram showing an example of an embodiment in which the arrangement of baffle plates is devised.

FIG. 4 is a configuration diagram showing another embodiment of the surface shape of the baffle plate.

FIG. 5 is a configuration diagram showing another embodiment of the surface shape of the baffle plate.

FIG. 6 is a configuration diagram showing another embodiment of the gas dissolving device.

FIG. 7 is a configuration diagram showing another embodiment of the gas dissolving device.

FIG. 8 is a configuration diagram showing another embodiment of the gas dissolving apparatus.

FIG. 9 is a configuration diagram showing another embodiment of the gas dissolving device.

FIG. 10 is a configuration diagram showing another embodiment of the gas dissolving apparatus.

FIG. 11 is a configuration diagram showing another embodiment of the gas dissolving apparatus.

FIG. 12 is a configuration diagram showing another embodiment of the gas dissolving apparatus.

FIG. 13 is an explanatory diagram showing a state in which an electric polarization radical is generated and an organic substance or the like is being decomposed.

FIG. 14 is an explanatory diagram showing a state in which ultraviolet rays destroy DNA, stop proliferation, and ozone damages cell walls and cell membranes of bacteria and viruses.

FIG. 15 is an explanatory diagram showing a state in which water below the water lily layer has a low oxygen concentration.

FIG. 16 is a configuration diagram showing an embodiment in which a dissolving / sterilizing means is provided in a gas dissolving apparatus.

FIG. 17 is a configuration diagram showing another embodiment in which a dissolving / sterilizing means is provided in the gas dissolving apparatus.

FIG. 18 is a configuration diagram showing an embodiment in which a dissolving / sterilizing means is provided in a gas dissolving apparatus.

FIG. 19 is an explanatory view showing an embodiment of a disassembling / sterilizing means in which a photocatalytic element is applied to the outside of the outer tube of the ultraviolet ray generating device.

FIG. 20 is a configuration diagram showing a conventional example of a gas dissolving apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Closed tank 2 Nozzle 3 Pump 4 Control valve 5 Stop valve 8 Aperture plate 9 Turbulence generation part (line mixer) 10 Baffle plate 11 Three-way valve 12 Pipe 15 Disassembly / sterilization means 16 Injection valve 17 Ultraviolet ray generation means 18 Outer tube 19 Photocatalyst

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[Procedure amendment]

[Submission date] September 26, 2001 (2001.9.2)
6)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

According to the present invention, there is provided a liquid supply device for supplying a liquid to a closed tank, the liquid supply device comprising:
Gas supply means for supplying gas to the liquid and / or
And a baffle plate provided in the closed tank, wherein the baffle plate is arranged so as to collide with the liquid supplied from the liquid supply means.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

In a fourteenth aspect, a liquid supply means for supplying a liquid to the closed tank , the closed tank and / or the liquid supply means.
Or a gas supply means for supplying gas to the liquid , wherein the gas in the space of the closed tank is pressurized by pressurizing means and released into the liquid in the closed tank. Gas dissolution equipment.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

In claim 15, claims 1 to 13
In the gas dissolving apparatus according to any of the above, a liquid supply unit that supplies a liquid to a closed tank , the closed tank and
And / or gas supply means for supplying gas to the liquid , wherein gas in the space of the closed tank is pressurized by pressurizing means and released into the liquid in the closed tank. .

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 1/50 531 C02F 1/50 531C 531R 540 540A 540B 550 550H 560 560C 560H 1/52 1/52 Z 3 / 00 3/00 D 3/24 3/24 B (72) Inventor Hiroshi Ishii 2-9-132 Nakamachi, Musashino City, Tokyo Inside Yokogawa Electric Corporation (72) Inventor Satoru Nakamura 2 Nakamachi, Musashino City, Tokyo No. 9-32 F-term in Yokogawa Electric Corporation (reference) 4D015 BA19 BA21 CA14 FA02 FA23 FA24 FA26 4D027 BA05 BA06 4D029 AA11 BB11 4G035 AA01 AB04 AC15 AC16 AC29 AC55 AE13

Claims (20)

[Claims] 1. A liquid supply means for supplying a liquid to a sealed tank, a gas supply means for supplying a gas, and a baffle provided in the closed tank, wherein the baffle is supplied from the liquid supply means. A gas dissolving device arranged so as to collide with a liquid to be discharged. 2. The gas dissolving apparatus according to claim 1, wherein the liquid is supplied downward from above the closed tank, and a baffle plate is disposed at a drop point of the liquid. 3. The liquid level of the closed tank is controlled within a predetermined range so as to maintain a flow velocity and a collision pressure of the liquid colliding with the baffle plate at a predetermined level or higher. Or the gas dissolving apparatus according to 2. 4. The gas dissolving apparatus according to claim 1, wherein a plurality of irregularities are provided on a surface of said baffle plate. 5. The gas dissolving apparatus according to claim 1, wherein an inclination is provided so that the vicinity of the center of the baffle plate is increased and gradually reduced toward the periphery. 6. The baffle plate is provided with a slope so that its height is increased in the vicinity of its center and gradually decreases toward its periphery, and liquid impinging on the slope of the baffle plate generates a vortex (swirl flow). The gas dissolving apparatus according to any one of claims 1 to 5, further comprising a groove or a projection. 7. The apparatus according to claim 1, wherein a plurality of the baffles are provided, and the liquid colliding with the baffle at the first stage falls while colliding with the baffles arranged at the next and subsequent stages.
7. A gas dissolving apparatus according to any one of claims 6 to 6. 8. A liquid supply means for supplying a liquid to a closed tank, and a gas supply means for supplying a gas, wherein the gas is injected from the gas supply means into the closed tank and the liquid supply means A gas dissolving apparatus, wherein a pipe for injecting the gas from the gas supply means is provided in at least one of a former stage and a latter stage. 9. A liquid supply means for supplying a liquid to a closed tank, and a gas supply means for supplying a gas, wherein the gas is injected from the gas supply means into the closed tank and the liquid supply means 8. The gas dissolving apparatus according to claim 1, wherein a pipe for injecting the gas from the gas supply unit is provided in at least one of a first stage and a second stage. 10. A liquid supply means for supplying a liquid to a closed tank, and a gas supply means for supplying a gas, wherein the gas is injected from the closed tank into at least one of a stage before and after the liquid supply unit. A gas dissolving apparatus comprising a pipe. 11. A liquid supply means for supplying a liquid to a closed tank, and a gas supply means for supplying a gas, wherein the gas is injected from the closed tank into at least one of a stage before and after the liquid supply unit. The gas dissolving apparatus according to any one of claims 1 to 7, wherein a pipe is provided. 12. The apparatus according to claim 8, wherein the liquid is supplied from above the closed tank via a nozzle.
0. A gas dissolving apparatus according to any one of the above. 13. The gas dissolving apparatus according to claim 12, wherein the outlet of the nozzle is arranged so as to face a tangential direction of the closed tank. 14. A liquid supply means for supplying a liquid to the closed tank, and a gas supply means for supplying a gas, wherein the gas in the space of the closed tank is pressurized by a pressurizing means, and the liquid in the closed tank is pressurized. A gas dissolving apparatus characterized in that the gas is released into the apparatus. 15. A liquid supply means for supplying a liquid to a closed tank, and a gas supply means for supplying a gas, wherein the gas in the space of the closed tank is pressurized by a pressurizing means and the liquid in the closed tank is pressurized. 14. The gas dissolving apparatus according to claim 1, wherein the gas is released into the apparatus. 16. A closed tank arranged in a plurality of stages, a connecting pipe for airtightly connecting the upper and lower portions of these closed tanks, a liquid supply means for supplying liquid to the first-stage closed tank, Gas supply means for supplying a gas to the tank, and a pipe for injecting the gas from the gas supply means into the closed tank and injecting the gas into at least one of a front stage and a rear stage of the liquid supply unit is provided. A gas dissolving apparatus. 17. A closed tank arranged in a plurality of stages, a connecting pipe for airtightly connecting the upper and lower parts of these closed tanks, a liquid supply means for supplying liquid to the first-stage closed tank, A gas supply means for supplying gas to the tank; and a pipe for injecting gas in the space of the closed tank into at least one of a preceding stage and a succeeding stage of the liquid supplying means. 18. A coagulant mixing means for mixing a coagulant for coagulating a pollutant contained in a liquid is provided in a pipe for supplying a liquid to a closed tank and / or a pipe for discharging a liquid. The gas dissolving apparatus according to any one of claims 1 to 17, wherein 19. A microbial contaminating means for mixing a pollutant contained in a liquid or a microorganism for decomposing a contaminant component in at least one of a pipe for supplying a liquid to the closed tank and a pipe for discharging the liquid. The gas dissolving apparatus according to any one of claims 1 to 18, wherein: 20. A closed tank constituting a gas dissolving apparatus, a pipe for supplying a liquid to the closed tank, or a pipe for discharging the liquid, for decomposing and sterilizing pollutants and microorganisms contained in the liquid in at least one place. The gas dissolving apparatus according to any one of claims 1 to 19, further comprising a decomposition / sterilization means.