JP2006000836A - Bubble-containing water flow generator and pollutant-removing apparatus provided with it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pollutant-removing apparatus capable of keeping an environment suitable for fauna and flora by supplying oxygen to a poor oxygen water zone in a closed water area such as lakes, marshes, or the like. <P>SOLUTION: The pollutant-removing apparatus 1 recovers the pollutant by making minute bubbles adhere to the pollutant in the water or the bottom of the lakes, marshes, or the like for the pollutant rise for recovery. The apparatus 1 comprises a floating gear 2 to keep the apparatus floating on the water, a dynamo 3, a gas-dissolving amount controller 4 to make gas dissolve into the water, a bubble-containing water flow generator 5 for generating a water flow containing plenty of the minute bubbles, a framework 6 in the shape of an erected cone enclosing the inside, converging from the bottom toward the water surface, and covered with a sheet stuck thereto, a stretchable sheet 7, a weight 8 attached to the stretchable sheet 7 at its lower end, a supporting rod 9 to fix the water flow generator 5 to the floating gear 2, a recovery port 13 of the overflowing floated pollutant, and a flexible discharging conduit 14 for discharging the recovered pollutant from the water area such as the lakes, marshes, or the like out of the water area. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

In the present invention, fine bubbles generated from a bubble-containing water flow generator capable of ejecting fine bubbles over a wide range to pollutants of organic matter and inorganic-organic composites deposited in water and at the bottom of lakes and the like are contaminated. By attaching to an object and increasing the buoyancy, it floats on the surface of the water and is recovered by the overflow method, so that the lake and the like can be reliably purified by removing it from the lake and the like.
At the same time, the present invention relates to a pollutant removal apparatus that can increase the amount of dissolved oxygen in the water area to make the water quality suitable for an ecosystem.

There are various water purification methods for lakes and marshes as listed below, and countermeasures have been taken for each of them.
1. The water mass stagnating in the closed water area is enhanced by the aeration produced by the water flow created by the ejector, promotes the flow of the water mass, supplies oxygen, and promotes biochemical decomposition (see, for example, Patent Document 1). ).

2. By mixing the upper water in the oxygen-rich state with a high water temperature and low density and the lower water in the oxygen-deficient state with a low water temperature and high density, the anoxic state in the middle and bottom water areas is eliminated, and organic matter (See, for example, Patent Document 2).

Japanese Patent Laid-Open No. 10-73099 JP 2003-230894 A

However, the conventional techniques described in Patent Documents 1 and 2 have the following problems.
There are many fields and people's houses in water collection areas such as lakes and marshes, and there is a current situation where eutrophic components such as residual fertilizer and domestic wastewater are continuously flowing in and stored.
In particular, in reservoir ponds and flood control dams that were constructed by blocking rivers that flowed naturally, organic materials such as fallen leaves for decades were accumulated on the bottom, and the above-mentioned artificial The eutrophic component is in the inflow state, and the aeration action as in the above two cases and the upper and lower waters are mixed to increase the dissolved oxygen in the target water area, activating microorganisms and animals and plants to improve the water quality There is a limit to the biochemical decomposition method to be purified, and there has been a problem that water pollution in lakes and marshes that progress year by year cannot be prevented.

The present invention solves the above problems, and pollutants in which organic matter floating in water such as lakes and marshes and inorganic / organic composites (inorganic fine particles and organic matter are combined) are deposited on the bottom. A large amount of fine bubbles are generated in the sludge using dissolved pressure water in which a gas is dissolved at a high concentration, and mixed with a strong water flow created by a propeller, thereby attaching fine bubbles to a wide range of pollutants. By doing so, the buoyancy of the pollutant increases and floats on the water surface.
By collecting and collecting the contaminants floating on the water surface by overflow, the contaminants can be removed outside the lake.
Moreover, since dissolved pressure water in which air or oxygen is dissolved at a high concentration is used at the same time, oxygen can be supplied to a wide range of anoxic water areas, and a bubble-containing water flow generator that can make a suitable environment for animals and plants in the water areas. An object of the present invention is to provide a pollutant removing device provided with

The bubble-containing water flow generator according to claim 1 of the present invention includes a water flow generator that generates a water flow with a propeller, a single or a plurality of concave portions provided on the downstream side of the water flow generator, and a gas in the concave portion. One or a plurality of dissolved water supply pipes to which adjuster nuts that can adjust the distance to the water flow generated by the water flow generator are supplied, And a nozzle portion to which nozzles such as a fine bubble generator, a flow rate adjusting nozzle, and an ejector nozzle can be connected to the end of the water supply pipe.
This configuration has the following effects.
(1) By generating a strong water flow with a propeller, a water flow containing a large amount of fine bubbles can be sprayed over a wide range, and the fine bubbles can be efficiently attached to pollutants in water.
(2) Since fine bubbles are generated using dissolved pressure water in which a gas is dissolved at a high concentration, the squirt water mixed with the fine bubbles released from the fine bubble generator still has a high concentration of gas. Because it is supersaturated water, if microbubbles are generated in the back of the recess away from the high speed part of the water flow created by the propeller, the gas dissolved in the supersaturated water is released toward the space inside the microbubbles, so it is fine The bubble diameter of bubbles is increased.
(3) When the fine bubble generator is brought close to the water flow from the propeller to generate the fine bubbles, the supersaturated water is diluted quickly, so that no gas is released toward the space inside the fine bubbles. The bubble diameter does not increase and can be mixed in the water flow in the state of almost generated fine bubbles.
(4) Since an adjuster nut is attached to the dissolved water supply pipe, the distance between the water flow from the propeller and the nozzle part is adjusted as desired to mix into the water flow using the above characteristics (2) and (3). The bubble diameter of the fine bubbles to be formed can be adjusted to a desired size according to the water quality of the water area and the state of the contaminants.

The pollutant removal apparatus provided with the bubble-containing water flow generator according to claim 2 of the present invention is equipped with a power source, equipment, etc. in removing pollutants floating and accumulated in water such as lakes. Generated by a propeller and a floating structure that can move on the surface of the water, a gas dissolution amount regulator that generates liquid bubbles in a liquid bubble generation container placed in a closed tank, and dissolves the gas at a high concentration The bubble-containing water flow generator according to claim 1 that mixes the generated water flow and the fine bubbles formed by the dissolved pressure water in which the gas is dissolved at a high concentration, and a shape that converges from the bottom toward the water surface using a sheet or the like. A sheet guide part that concentrates the floating contaminants in a narrow area of the water surface, and a recovery removal part that removes the floating contaminants outside the lake by an overflow method using a pump or head difference Constitution It has been.
This configuration has the following effects.
(1) Since the floating structure is provided, the entire apparatus can be moved using the water flow from the bubble-containing water flow generator connected to the lower water as a driving force.
It can also be moved from the shore using ropes, etc., or it can be moved by attaching an outboard motor to the floating structure. Can remove contaminants.
(2) Since it has a gas dissolution amount adjuster, it is possible to produce dissolved pressure water in which a gas such as air or oxygen is dissolved at a high concentration. By using this dissolved pressure water, a large amount of fine bubbles can be generated. Can do.
In addition, since it contains a large amount of oxygen, the surrounding water area can be made an oxygen-rich water area suitable for the ecosystem.
(3) Since it has a bubble-containing water flow generator, a water flow containing a large amount of fine bubbles can be injected into a wide range of water.
(4) Since the seat guide portion is provided, it is possible to minimize the influence of a natural water flow and wind on the water surface in the seat guide.
Further, since the energy of the water flow generated by the bubble-containing water flow generator is not released to the outside of the sheet guide portion, the fine bubbles can be efficiently attached to the contaminants without wasting energy.
Further, the contaminants to which the fine bubbles are attached due to this float on the narrow water surface that converges along the sheet guide, and can be led to the recovery and removal section.
(5) Since it has a recovery / removal section, it is possible to suck and recover the floating and separated contaminants by the overflow method and reliably remove them from the lakes and the like.
The power to be recovered may be a pump, but if there is a water head difference (including siphon) between the water level in the dam and the place where it is discharged, it can be recovered and removed without using an artificial power source.

The bubble-containing water flow generator according to claim 1 of the present invention has the following effects.
(A) Since a large amount of fine bubbles can be mixed in a strong water flow made by a propeller, fine bubbles are attached to a wide range of water and pollutants such as organic matter and inorganic organic composites at the bottom. It can be efficiently levitated on the surface of the water and has excellent controllability and efficiency.
(B) Since fine bubbles are generated using dissolved pressure water in which a gas is dissolved at a high concentration, by adjusting the distance between the water flow from the propeller and the fine bubble generator of the nozzle part, Since the bubble diameter of the fine bubbles to be mixed can be adjusted as desired according to the water quality of the water area and the state of the contaminants, the compatibility and controllability are excellent.
(C) A flow adjustment nozzle is attached to the nozzle, and high-concentration oxygen-dissolved water is ejected. Immediately mixed with a strong water flow from the propeller and diluted to minimize decompression foaming efficiently in a wide range of water areas. Oxygen can be supplied, and it can also be used as an excellent device for eliminating poor oxygen water.

According to the pollutant removal apparatus provided with the bubble-containing water flow generator according to claim 2 of the present invention, the following effects are obtained.
(A) A method that generates a large amount of fine bubbles and mixes them in a strong water flow using dissolved pressure water in which a gas such as air or oxygen is dissolved at a high concentration. And the water area can be enriched.
(B) Unlike the removal of pollutant deposits during dredging work, organic substances such as organic and inorganic-organic composites in water and at the bottom are levitated and recovered on the surface of the water, without removing massive inorganic substances such as sand. In addition, since the water quality in the water area can be improved by removing it outside the water area, it is excellent in efficiency and energy saving.
(C) Since it is a floating structure, it can be moved on the surface of the water using the water flow generated from the bubble-containing water flow generator, and it moves to a place where a lot of contaminants are accumulated, thereby efficiently removing the contaminants. It is also easy to operate.
(D) This device can be used in combination with various dredging methods, and can be collected and removed by attaching fine bubbles to floating substances that float in large quantities in the water area under dredging, and separating them by floating. Water pollution during construction can be minimized.
(E) In aquaculture farms in closed waters such as lakes and oceans, for example, by attaching fine bubbles to residual bait and feces deposited at the bottom, and collecting them by raising and increasing buoyancy to collect residual bait and feces By removing and simultaneously supplying oxygen to the water area to create a suitable environment for the seafood ecosystem, the survival rate and growth rate are increased, and the fishery income can be increased.
(F) The polluted matter that has floated and recovered on the water surface contains a lot of organic matter, and can be recycled and used effectively.

FIG. 1 is a configuration diagram of a pollutant removing apparatus provided with a bubble-containing water flow generator according to an embodiment of the present invention. 1 is a pollutant removing apparatus provided with a bubble-containing water flow generator, and 2 is a bubble containing water on the water surface. 2 is a floating structure for maintaining the levitating device 1 with a water flow generator in a floating state, 3 is a generator for generating a power source for the entire device, and 4 is a high-performance gas dissolution amount adjustment described in FIG. 5. A bubble-containing water flow generator according to claim 1, wherein 5 contains fine bubbles in the water flow shown in FIG. 4, and 6 is a light and sturdy aluminum pipe and the like, while enclosing the bone structure toward the water surface. A sheet guide which is converged and a sheet or the like is attached to the bone structure, 7 is a telescopic sheet attached to the lower part of the sheet guide 6, and 8 is a weight attached to the end for grounding the sheet 7 to the bottom (claim 2). The sheet guide described inside is a sheet guide 6, a sheet 7, and a weight 8.), 9 is formed by connecting the floating structure 2 and the bubble-containing water flow generator 5, or by providing a rotary bearing on the floating structure 2. A supporting shaft rod that can also rotate the bubble-containing water flow generator 5 to swing the fan, 10 is an electric wire that sends electric power for operating the propeller 5C in the bubble-containing water flow generator 5, and 11 is a bubble-containing water flow generator 5 A hose that sends dissolved pressure water in which a gas is dissolved at a high concentration to a nozzle part (microbubble generator 5A, etc.) attached inside, 12 is a pollutant that floats on the water surface due to the attachment of fine bubbles to the pollutant and increased buoyancy , 13 is an overflow recovery port for recovering the pollutant 12 floating on the water surface of the narrow enclosure by the overflow method, and 14 is a flexible drain pipe for removing the recovered pollutant 12 from the water area such as a lake or the like outside the water area ( The recovery / removal part described in claim 2 is composed of an overflow recovery port 13 and a flexible drainage pipe 14.), 15 is a pollutant layer (sludge etc.) deposited on the bottom of a lake or the like , 16 is a dam such as a lake.
In addition, since the pollutant 12 discharged | emitted out of the dam 16 contains many organic substances, it can also be recycled easily.

The contaminant removal apparatus 1 provided with the bubble containing water flow generator in embodiment is demonstrated.
First, a power source is generated by operating the generator 3 (power transmission from land) in FIG. 1, and then the pump of the front sectional view in which the gas dissolution amount regulator 4 shown in FIG. 2 is enlarged. 20 is operated and the water W in the lake is sucked by the suction pipe 20a, so that the gas X is supplied from the pore portion of the gas self-priming pipe 20b to the tank 21 by using the negative pressure generated in the suction pipe 20a. Slightly larger than the amount of gas X dissolved therein, the self-priming is made by the regulating valve 20c, the mixed pressure water of the gas X and water W is made on the discharge side of the pump 20, and is arranged in the upper part of the closed tank 21. By injecting from the nozzle 22 toward the center bottom in the liquid foam generating container 23, a large amount of gas X in the tank is entrained as shown in the enlarged flow diagram of bubbles and liquid bubbles in the liquid foam generating container 23 shown in FIG. 2a. A large amount of bubbles are generated at the bottom of the liquid bubble generation container 23. It can be.
Bubbles generated in a large amount at the bottom portion of the liquid foam generating container 23 ascend to the peripheral wall of the liquid foam generating container 23 due to buoyancy, and as a result, by changing to liquid bubbles as shown in FIG. The water W injected into the tank 21 becomes thin film water on the surface of the liquid foam, and the gas X is dissolved in the thin film water in a high concentration according to the pressure gas P in the tank 21. The pressure in the tank 21 gradually increases according to the discharge resistance of the nozzle part which is temporarily stored as the dissolved pressure water 2W in the lower part of the tank 21 and connected to the discharge pipe 25 via the hose 11. The pressure in the tank 21 is determined by the pressure from the nozzle 22 and the discharge resistance of the nozzle portion.
Further, since the gas X is slightly self-primed from the regulating valve 20c in an amount dissolved in the tank 21, the water level of the dissolved pressure water 2W gradually decreases, and the water level sensor 24 senses the water level of Z. The information is transmitted to the regulating valve 20c and the self-priming of the gas X is stopped.
As the supply of the gas X into the tank 21 is stopped, the gas X in the tank 21 decreases as it is dissolved, and the water level of the dissolved pressure water 2W rises. The water level rising to the water level of Y is detected by the water level sensor 24, and the information is transmitted to the regulating valve 20 c, and the gas X is again self-primed slightly more than the amount dissolved in the tank 21.
By repeating this process, the water level of the dissolved pressure water 2W can be maintained in the range of Y to Z, and the gas can be stably and efficiently dissolved at a high concentration, and bubbles can be generated through the hose 11 connected to the discharge pipe 25. It can send to the nozzle part (5A of fine bubble generators etc.) in the containing water flow generator 5. FIG.
A pressure gauge 26 senses the pressure in the tank 21.

When pure oxygen gas is self-primed from the regulating valve 20 c in FIG. 2, the pure oxygen gas has a good dissolution rate with respect to the water W, and the nitrogen gas originally dissolved in the water W is released into the tank 21. As a result, the nitrogen gas concentration in the tank 21 gradually increases, and the oxygen concentration of the dissolved pressure water 2W discharged from the discharge pipe 25 decreases.
At this time, for example, by using a solenoid valve / timer or the like from the nitrogen discharge valve 23a, the nitrogen gas accumulated in the tank 21 is intermittently discharged out of the tank 21, so that the dissolved pressure water 2W discharged from the discharge pipe 25 again. The oxygen concentration can be increased.

FIG. 3 is a cross-sectional view of the bubble-containing water flow generator 5 according to claim 1 attached in the sheet guide 6 of FIG. 1, and the dissolution supplied from the gas dissolution amount adjuster 4 mounted on the floating structure 2. A large amount of fine bubbles are generated in the recess 5D by supplying the pressure water 2W to the fine bubble generator 5A (nozzle part) from the dissolved water supply pipe 5W disposed in the recess 5D via the hose 11. Can do.
At the same time, the electricity sent by the generator 3 through the power line 10 is sent to the underwater motor 5B, and a powerful water flow is generated by the rotation of the propeller 5C, so that it is mixed with the fine bubbles generated in the recess 5D. A bubble-containing water stream containing a large amount of fine bubbles in the water stream can be produced.
In the bubble-containing water flow generator 5 in FIG. 3, a nozzle such as a fine bubble generator 5A can be connected to and exchanged at the end of the dissolved water supply pipe 5W.
In addition, since the dissolved pressure water 2W in which the gas is dissolved at a high concentration is used in the recess 5D disposed on the downstream side of the propeller 5C, the generation of fine bubbles described in the upper recess 5D in FIG. If it is separated from the high speed part of the water flow from the propeller 5C as in the vessel 5A, the inside of the recess 5D becomes supersaturated, and the gas dissolved during the supersaturation is discharged toward the space in the generated fine bubbles. The bubble diameter of the bubbles increases.
If the high speed portion of the water flow from the propeller 5C is approached like the fine bubble generator 5A described in the lower concave portion 5D in FIG. 3, the water flow is continuously sent from the propeller 5C into the concave portion 5D. Therefore, the periphery of the microbubbles that are diluted and generated is not supersaturated, and therefore the bubble diameter does not increase.
By adjusting the distance between the nozzle part and the high-speed part of the water flow by the adjuster nut 5E attached to the dissolved water supply pipe 5W, the bubble diameter of the fine bubbles mixed and released into the water flow is adjusted using the above characteristics. it can.
5F is a boss hole that can fix the support rod 9 connected to the floating structure 2 on the water surface and the bubble-containing water flow generator 5 using a bolt and nut or the like, and is for fixing the water flow direction.
There are many types of ready-made flow rate adjustment nozzles and ejector nozzles, and the illustration is omitted.

FIG. 3 a is a microbubble generator having a hollow portion formed in a substantially rotational symmetry of a swirling flow system, and is a schematic diagram showing a water flow and a gas flow, which is sent from the gas dissolution amount regulator 4 through the hose 11. The dissolved pressure water 2W is supplied from the supply pipe 5b connected in the inner surface tangential direction of the vessel body 5a, thereby forming a strong swirl flow in the vessel body 5a and provided at both ends in the rotationally symmetric axis direction. The gas is swirled while converging in the gas-liquid ejection hole 5c, and is swung at high speed toward the outside water to be ejected as ejected gas-liquid 5d.
At this time, a strong negative pressure shaft 2X is formed in the central axis portion of the swirling flow in the vessel body 5a. As a result, the external liquid is subjected to a force that tends to enter the vessel 5a in which the negative pressure shaft 2X is formed (hereinafter, the liquid on which this force acts is referred to as the negative pressure liquid 5e).
At the same time, the dissolved pressure water 2W in which the gas is dissolved at a high concentration in the vessel body 5a is swirling around the strong negative pressure shaft 2X, and the dissolved pressure water 2W in the negative pressure portion near the negative pressure shaft 2X. The gas dissolved therein is released and the gas continuously increasing while gathering on the negative pressure axis 2X to form the negative pressure gas axis flows from the low pressure region to the gas-liquid jet holes 5c at both ends in the high pressure region, The jet liquid 5d and the negative pressure liquid 5e, which are swirling at high speed, are sent to a gap portion where they are pressed against each other.
The gas sent from both ends of the low-pressure negative pressure shaft 2X to the high-pressure gap is generated into fine bubbles by being strongly compressed and sheared, and discharged into the water as an ejection liquid 5d containing a large amount of fine bubbles.
In addition, the high-concentration dissolution pressure water 2W produced by the gas dissolution amount regulator 4 is supplied to the fine bubble generator 5A to generate fine bubbles, and the gas is still sufficiently dissolved in a high concentration. Because it is supersaturated water, the time to dilute with the water flow from the propeller 5C becomes longer, and the gas dissolved in the supersaturated water is released into the space inside the microbubbles. When it becomes larger and close to the opposite, the supersaturated water ejected from the fine bubble generator 5A is immediately contacted with the water stream and diluted, and the bubble diameter does not increase because the periphery of the fine bubbles is not supersaturated water.

FIG. 4 is a schematic diagram showing an enlarged view of fine bubbles B adhering to and floating on the pollutant H, and the enlarged view inside the round enclosure floats with the minute pollutants h attached to the fine bubbles B. It shows how it is doing.
In the state shown in this schematic diagram, the contaminant H and the minute contaminant h float in the sheet guide 6 and are collected as the contaminant 12 on the converged narrow water surface, and are collected from the overflow recovery port 13 through the flexible drain pipe 14. It is removed outside the dam 16.

Since the contaminant removal apparatus 1 provided with the bubble-containing water flow generator 5 according to the embodiment is configured as described above, it has the following actions.
(A) A strong water flow is created by the propeller 5C in the bubble-containing water flow generator 5, and a large amount of fine bubbles having a very low rising speed are mixed in the water flow, so that the generated fine bubbles can be kept in the water for a long time. You can increase the chance of contact with pollutants by drifting.
Further, since the bubble-containing water flow generator 5 can be rotated like the swing of the electric fan by the support shaft 9, a water flow containing fine bubbles can be sent to a wider range of water.
(B) Since the floating structure 2 is used, devices such as the generator 3 and the gas dissolution regulator 4 can be mounted and can be freely moved to a desired location on the surface of a lake or the like.
Also, the apparatus can be moved to a desired location by lifting the sheet 7 and ejecting the water flow generated from the bubble-containing water flow generator 5 to the outside of the sheet 7 to provide a driving force.
Moreover, it can also be moved from land using a rope or the like, and when it does not move at all, the anchor or the like can be submerged and fixed.
(C) The fine bubbles B adhere to the pollutant H, and the pollutant 12 generated by floating while converging in the sheet guide 6 is recovered from the overflow recovery port 13 and reliably discharged from the lake by the flexible drain pipe 14. It can be removed to the outside.
(D) Since the sheet 7 with the weight 8 attached to the lower end of the sheet guide 6 confines water containing fine bubbles in the sheet guide 6, the fine bubbles easily contact and adhere to the bottom contaminant layer 15, Further, it is possible to prevent the contaminated water being processed in the sheet 7 from flowing out of the sheet 7.
(E) Since dissolved pressure water 2W in which a gas is dissolved at a high concentration is used in the recess, if the fine bubble generator 5A (nozzle portion) is separated from the water flow from the propeller 5C, the recess is supersaturated. The bubble diameter of the generated fine bubbles becomes large and the gas dissolution concentration in the concave portion is diluted when approaching, so that the concave portion is not supersaturated and the bubble size of the generated fine bubble does not increase.
Utilizing the above characteristics, the distance between the fine bubble generator 5A (nozzle part) and the water flow from the propeller 5C is adjusted by an adjuster nut 5E attached to the dissolved water supply pipe 5W, thereby mixing with the water flow. The bubble diameter of the fine bubbles can be changed.

Table 1 is a material for determining the dissolving capacity by supplying air and pure oxygen into the tank 21 using the injection energy of the water pressure using the gas dissolution amount regulator 4 and changing the pressure in the tank 21. The experiment example which measured dissolved oxygen amount (DO) is shown.
In the experiment, tap water of DO11.8ppm at a water temperature of 7.9 ° C was sprayed and operated from a nozzle diameter of 7 mm at a water pressure of 0.34 MPa, and the gas dissolved water was made from HORIBA Model D-25 and Nippon Battery Model DOM.・ Measured using two types of 2000 dissolved oxygen meters.
The pressure gauge used was Toyo Keiki Kogyo Co., Ltd. TYPE-A0-7, and the thermometer used was Techno Subn Model D616.

As can be seen from the numerical value of the dissolved oxygen amount DO in Table 1, an ultra-high concentration oxygen-dissolved water can be generated if pure oxygen is dissolved using the gas dissolution amount adjuster 4, so that the hose is connected to the discharge pipe 25 in FIG. 11, the pressure in the tank 21 of the gas dissolution amount regulator 4 can be adjusted as desired by adjusting the amount of discharge from the flow rate adjustment nozzle and then adjusting the discharge amount from the flow rate adjustment nozzle. A high-concentration oxygen-dissolved water corresponding to the pressure can be obtained from the outlet of the flow rate adjusting nozzle.
The high-concentration oxygen-dissolved water produced in this way is immediately diluted efficiently with the water flow of the propeller 5C, thereby suppressing excessive decompression foaming and efficiently supplying oxygen to a wide range of water areas. It can also be used as an oxygen supply device that can be used.
Further, if an oxygen production apparatus is provided on the floating structure 2, oxygen can be stably supplied to the gas dissolution amount adjuster 4.

In the water area where the water temperature of the water area to be treated is low or the water depth is high and the water pressure is high, even fine bubbles generated with air with high gas saturation concentration may be absorbed and dissolved in the water and disappear.
In the case of such a water quality state, by replacing the fine bubble generator 5A and the ejector nozzle in FIG. 1, a pipe that self-sucks air from above the floating structure 2 becomes a gas self-suction hole of the ejector. By connecting, a water flow including fine bubbles and a slightly larger bubble diameter can be created in the water area to be treated.

(1) Locations where organic matter such as fallen leaves has accumulated for decades in a closed water area such as a lake or ocean, or where residual food or feces have accumulated at the bottom of a seafood farm In this system, fine bubbles are attached to the accumulated pollutants, and the water quality is purified by raising and recovering by increasing the buoyancy, and at the same time supplying oxygen to the water area to make the environment suitable for the ecosystem. Available as
In addition, the pollutant that has floated on the surface of the water contains many organic substances and can be recycled.
(2) Can be used in combination with various dredging methods, can stop the discharge of a large amount of contaminants floating in the water area during dredging work, and is fine in floating contaminants It can be recovered by adhering air bubbles, and can be used as a device that can extremely effectively suppress water pollution during dredging work.
(3) The gas dissolution amount adjuster arranged on the floating structure can dissolve the gas supplied into the tank 100% without waste because of gas dissolution by liquid bubble generation.

  Configuration diagram of a pollutant removal apparatus provided with a bubble-containing water flow generator of an embodiment   Front sectional view of the gas dissolution amount regulator   Enlarged view of the flow of bubbles and liquid bubbles in the liquid bubble generation container   Schematic diagram in which the pressure gas P is instantaneously dissolved in the thin film water on the surface of the liquid bubble in the tank 21   Cross section of a bubble-containing water flow generator   Flow diagram showing fluid flow in microbubble generator   Schematic diagram of fine bubbles adhering to contaminants

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pollutant removal apparatus 2 provided with bubble-containing water flow generator of embodiment 2 Floating structure 3 Generator 4 Gas dissolution amount regulator 5 Bubble-containing water flow generator 5A Fine bubble generator (nozzle part)
5B Submersible Motor 5C Propeller 5D Recess 5E Adjuster Nut 5F Boss Hole 5W Dissolved Water Supply Pipe 5a Body 5b Supply Pipe 5c Gas-Liquid Ejection Hole 5d Ejection Liquid 5e Negative Pressure Liquid 6 Sheet Guide 7 Sheet 8 Weight 9 Support Shaft Rod 10 Power Line DESCRIPTION OF SYMBOLS 11 Hose 12 Polluted material 13 Overflow recovery port 14 Flexible drainage pipe 15 Polluted material layer 16 Dam 20 Pump 20a suction pipe 20b Gas self-priming pipe 20c Adjustment valve 21 Tank 22 Nozzle 23 Liquid bubble generation container 23a Chisso discharge valve 24 Water level sensor 25 Discharge pipe 26 Pressure gauge X Gas 2X Negative pressure axis W Water 2W Dissolved pressure water WF Thin film water P Pressure gas B Fine bubble H Pollutant h Minute pollutant Y Upper limit water level Z Lower limit water level

Claims (2)

  A water flow generator for generating a water flow by a propeller, one or a plurality of concave portions provided on the downstream side of the water flow generator, and a dissolved pressure water in which a gas is dissolved at a high concentration in the concave portion, One or a plurality of dissolved water supply pipes attached with an adjuster nut capable of adjusting the distance to the water flow generated by the microbubble generator, a flow rate adjusting nozzle, and an ejector at the end of the dissolved water supply pipe A bubble-containing water flow generator comprising a nozzle portion to which a nozzle such as a nozzle can be connected.   A floating structure that can move on the surface of the water, equipped with a power source, equipment, etc., and placed in a closed tank to remove contaminants floating and deposited in water such as lakes A gas dissolution amount regulator that generates liquid bubbles in a liquid bubble generation container and dissolves gas at a high concentration, a water flow generated by a propeller, and fine bubbles created by dissolved pressure water that dissolves gas at a high concentration. The bubble-containing water flow generator according to claim 1 to be mixed, a sheet guide portion that surrounds a shape that converges from the bottom toward the water surface by using a sheet or the like, and that floats up the polluted material to a narrow area of the water surface, and is floated. A pollutant removal apparatus comprising: a collection and removal unit that removes the pollutant to the outside of the lake by an overflow method using a pump or a water head difference.

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