JP3631999B2 - Fine bubble feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bubble supply device, and more particularly, to a bubble supply device capable of separating and collecting fine bubbles from bubbles generated from a bubble generation device.
[0002]
[Prior art]
In order to separate the pollutant or suspended substance in the polluted water, a floating separation method or a foam separation method is generally used. In the levitation separation method and the foam separation method, the outside air has to be widely suspended in the contaminated water as bubbles.
In the foam separation method, the dissolved substance that is the target substance for separation is concentrated around the gas-liquid interface between the bubbles generated in the polluted water and the polluted water, that is, the surfactant is added to the polluted water. Thus, the dissolved substance is separated. This method is mainly applied for the purpose of removing surface active substances in waste water. In addition, when removing an inert substance such as a metal ion, the metal ion is activated and separated by adding a flocculant.
[0003]
The flotation separation method is one of the methods for separating suspended substances in polluted water. In the levitation separation method, when the density difference between the liquid in the polluted water and the suspended substance is small, as a means for promoting the separation, fine bubbles are introduced into the water and the bubbles are attached to the suspended matter. To separate. For example, in the treatment of factory wastewater or the like, air bubbles having a size that does not destroy the flocs that have been agglomerated by neutralization and agglomeration are attached and floated and separated.
[0004]
Therefore, conventionally, there have been various devices as a device for generating fine bubbles for use in the floating sorting method and the foam separation method. For example, the “microbubble generator” invented by the applicant (Japanese Patent Application No. 2001-157960),
[0005]
(Claim 1) A stirring fin provided at the bottom of the water tank, and having a plurality of blades provided radially with respect to the rotation shaft to form a rotatable stirring portion;
A drive unit provided at a lower portion of the stirring fin and rotating the stirring fin;
One end is located at the rotation center of the stirring unit and is opened, the other end is opened to the gas supplied to the stirring unit in the water tank, and a supply pipe capable of supplying the gas opened at the other end to the stirring unit,
A microbubble generator characterized by comprising:
(Claim 2) A drive unit that is provided outside the aquarium and provides a rotational driving force to a driven unit provided on the inside of the aquarium,
Provided inside the water tank, one end receives a driving force from the driving part to form a rotatable follower part, and the other end forms a stirring part made up of a plurality of blades. A stirring fin rotating at
One end is located at the center of the stirring portion of the stirring fin and opened, the other end is opened outside the water tank, and a supply pipe capable of supplying gas outside the water tank to the stirring section in the water tank,
A microbubble generator characterized by comprising:
(Claim 3) A lid body having a cylindrical shape in which one end is closed and the other end is opened, and a flange portion that can be attached to the bottom of the water tank is provided on the opened side surface;
An outer magnet is provided outside the lid on the bottom of the aquarium, and an outer magnet is formed at the distal end with a plurality of magnets arranged side by side so that the magnetic poles alternate along the circumferential direction of the lid cylindrical surface. Is a drive unit that forms a motor unit that rotates the outer magnet unit in the same manner as the lid cylindrical axis and the rotation axis;
The base end portion is provided in the lid body, and an inner magnet portion is provided in which a plurality of magnets are alternately provided along the cylindrical inner surface of the lid body so that the magnetic poles alternate, and the distal end portion projects from the lid body into the water tank. , Forming a stirring portion composed of a plurality of blades, and stirring fins rotated with the rotation of the outer magnet portion;
One end is opened and positioned at the center of the stirring portion of the stirring fin, the other end is opened outside the water tank, and a supply pipe capable of supplying gas to the stirring section in the water tank,
A microbubble generator characterized by comprising:
(Claim 4) A lid having a cylindrical shape in which one end is closed and the other end is opened, and a flange that can be attached to the bottom of the water tank is provided on the opened side surface;
An outer magnet is provided outside the lid on the bottom of the aquarium, and an outer magnet is formed at the distal end with a plurality of magnets arranged side by side so that the magnetic poles alternate along the circumferential direction of the lid cylindrical surface. Is a drive unit that forms a motor unit that rotates the outer magnet unit in the same manner as the lid cylindrical axis and the rotation axis;
The base end portion is provided in the lid body, and an inner magnet portion is provided in which a plurality of magnets are alternately provided along the cylindrical inner surface of the lid body so that the magnetic poles alternate, and the distal end portion projects from the lid body into the water tank. , Forming a stirring portion composed of a plurality of blades, and stirring fins rotated with the rotation of the outer magnet portion;
One end is opened and positioned at the center of the stirring portion of the stirring fin, the other end is opened outside the water tank, and a supply pipe capable of supplying gas to the stirring section in the water tank,
A stator that is provided outside the rotation of the stirring fin, and has a plate-like body standing upright that disturbs stirring of the stirring fin;
A microbubble generator characterized by comprising: It consists of.
[0006]
In this “fine bubble generating device” (Japanese Patent Application No. 2001-157960), the stirring fin rotates and stirs to draw gas outside the water tank into the water tank and finely decompose it to generate fine bubbles. Then, floating sorting and foam separation were performed in the tank by the generated fine bubbles.
And depending on the separation target present in the liquid, in carrying out the floating sorting method and the foam separation method, a surfactant or a flocculant is added to the contaminated water in advance and reacted with a specific gas to be removed, or Some were desirable to be removed by adhering to certain gas bubbles.
[0007]
[Problems to be solved by the invention]
However, in order to remove a specific separation target existing in the liquid by the floating sorting method or the foam separation method, a gas for collecting the separation target is supplied to generate fine bubbles, which are attached to the separation target and separated. In order to remove the target, if there are relatively large bubbles other than fine bubbles, an upward water flow is generated in the reaction tank, and the reaction proceeds only at a specific place in the reaction tank from the other places. However, the “fine bubble generator” (Japanese Patent Application No. 2001-157960) shown in the conventional example can generate fine bubbles, but in the bubbles, the fine bubbles are generated together with the fine bubbles. Since relatively large bubbles that were not fine were also generated, there was a problem that good separation could not be performed.
[0008]
This invention makes it a subject to provide the fine bubble supply apparatus which can collect fine bubbles efficiently from the produced | generated bubble, and can supply it in a tank.
[0009]
[Means for Solving the Problems]
So this invention is
[0010]
It consists of a hollow container into which polluted water is placed, and a bubble generating tank with a discharge port opened at the bottom, and a stirring fin that can rotate in the polluted water at the tip, and the stirring fin and the outside of the bubble generating tank are connected by a cylinder An impeller portion that is capable of generating bubbles including fine bubbles by gas from outside the bubble generation tank via the passage cylinder by communicating and the stirring fin rotates in the polluted water, and a rotation shaft of the impeller portion below the impeller portion, A disk is provided on the same axis, and a plurality of blades are fixed to the lower surface of the disk. The turbine generates a water flow by rotating, and is opened at the bottom of the bubble generation tank below the turbine, and can absorb water into the bubble generation tank. A fine air bubble supply device comprising a water supply port,
[0011]
as well as,
It consists of a hollow container into which polluted water is placed, and a bubble generating tank with a discharge port opened at the bottom, and a stirring fin that can rotate in the polluted water at the tip, and the stirring fin and the outside of the bubble generating tank are connected by a cylinder An impeller portion that is capable of generating bubbles including fine bubbles by gas from outside the bubble generation tank via the passage cylinder by communicating and the stirring fin rotates in the polluted water, and a rotation shaft of the impeller portion below the impeller portion, A disk guide is provided on the same axis, and a plurality of blades are fixed to the lower surface of the disk. The bubble guide is formed of a turbine that generates a water flow by rotation and a plate-like body, and is fixed to the inner surface of the bubble generation tank in a spiral shape. A fine bubble supply device comprising: a plate, and a water supply opening that is opened at a bottom surface of the bubble generation tank below the turbine and capable of absorbing water into the bubble generation tank;
[0012]
as well as,
It consists of a hollow container into which polluted water is placed, and a bubble generating tank with a discharge port opened at the bottom, and a stirring fin that can rotate in the polluted water at the tip, and the stirring fin and the outside of the bubble generating tank are connected by a cylinder An impeller portion that is capable of generating bubbles including fine bubbles by gas from outside the bubble generation tank via the passage cylinder by communicating and the stirring fin rotates in the polluted water, and a rotation shaft of the impeller portion below the impeller portion, A disk is provided on the same axis, a plurality of blades are fixed on the lower surface of the disk, and a turbine that generates water flow by rotating, and is provided below the turbine, has a cylindrical shape, and has a lower end opening to the bubble generation tank. A fine air bubble supply device characterized by comprising a flow straightening cylinder that forms a water supply port,
[0013]
as well as,
It consists of a hollow container into which polluted water is placed, and a bubble generating tank with a discharge port opened at the bottom, and a stirring fin that can rotate in the polluted water at the tip, and the stirring fin and the outside of the bubble generating tank are connected by a cylinder An impeller portion that is capable of generating bubbles including fine bubbles by gas from outside the bubble generation tank via the passage cylinder by communicating and the stirring fin rotates in the polluted water, and a rotation shaft of the impeller portion below the impeller portion, A disk is provided on the same axis, a plurality of blades are fixed on the lower surface of the disk, and a turbine that generates water flow by rotating, and is provided below the turbine, has a cylindrical shape, and has a lower end opening to the bubble generation tank. A fine bubble supply device comprising a flow straightening cylinder that forms a water supply port, and a bubble guide plate that is formed of a plate-like body and is helically fixed to the inner surface of the bubble generation tank,
[0014]
I will provide a. The operation of the present invention is as follows.
That is, when the supply port is opened at the bottom surface of the bubble generation tank and no rectifying cylinder is provided, the impeller portion rotates in the bubble generation tank. Similarly, the turbine rotates. Then, a large amount of bubbles including fine bubbles are generated around the impeller portion in the bubble generation tank by the rotation of the impeller portion.
At this time, a water flow is generated in the polluted water by the rotation of the turbine from the supply port opened at the bottom of the bubble generation tank below the turbine to the discharge port of the bubble generation tank. By this water flow, fine bubbles in the bubbles generated around the impeller portion are discharged from the discharge port by the water flow. On the other hand, relatively large bubbles in the bubbles generated around the impeller portion float upward due to their own buoyancy without being caused to flow by the water flow generated by the turbine.
[0015]
In addition, when the supply port is opened at the bottom of the bubble generation tank and no rectifying cylinder is provided, and the bubble guide plate is provided on the inner surface of the bubble generation tank, the fine bubbles carried to the discharge port by the water flow are It is guided by the plate, and is discharged from the discharge port toward the discharge port on the bubble guide plate and below the bubble guide plate.
[0016]
Furthermore, when the flow straightening cylinder is provided in the bubble generation tank, the impeller portion rotates in the bubble generation tank. Similarly, the turbine rotates. Then, a large amount of bubbles including fine bubbles are generated around the impeller portion in the bubble generation tank by the rotation of the impeller portion.
At this time, a water flow is generated in the polluted water by the rotation of the turbine from the supply port at the lower end of the rectifying tube to the opening at the upper end of the rectifying tube and the outside of the rectifying tube in the bubble generating tank to the discharge port of the bubble generating tank. By this water flow, fine bubbles in the bubbles generated around the impeller portion are discharged from the discharge port by the water flow. On the other hand, relatively large bubbles in the bubbles generated around the impeller portion float upward due to their own buoyancy without being caused to flow by the water flow generated by the turbine.
[0017]
When a flow straightening cylinder is provided in the bubble generation tank and a bubble guide plate is provided on the inner surface of the bubble generation tank, the fine bubbles carried to the discharge port by the water flow are guided by the bubble guide plate It is discharged from the discharge port on the guide plate toward the discharge port.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory front view of a fine bubble generator according to a first embodiment of the present invention, and FIG. 2 is a front view showing a state where the fine bubble supply device according to the embodiment of the present invention is implemented in a contaminated water tank. 3 is an explanatory side view, FIG. 3 is an enlarged side explanatory view of a part of a front explanatory view of a fine bubble generating apparatus according to an embodiment of the present invention, and FIG. 4 is an explanatory view taken along line AA of FIG. FIG. 5 is an explanatory view of an impeller part which is a part, FIG. 6 is an explanatory view of the turbine, FIG. 7 is an explanatory view showing a second embodiment, and FIG. 8 is an explanatory view of the third embodiment. It is front explanatory drawing of the microbubble generator which is a form.
[0019]
Reference numeral 1 denotes a fine bubble generating apparatus according to a first embodiment of the present invention. The fine bubble generating apparatus 1 includes a bubble generating tank 2 filled with a liquid to be separated, an impeller unit 3 that generates bubbles in the bubble generating tank 2, a turbine 4 provided below the impeller unit 3, and a lower part of the turbine 4 And a bubble guide plate 6 fixed to the wall surface which is the inner surface of the bubble generation tank 2. And the fine bubble generator 1 is attached to the reaction tank W provided elsewhere.
[0020]
As shown in FIGS. 1 to 4, the bubble generating tank 2 has a hollow prismatic shape, and a discharge port 21 is formed at the lower part of one side surface. The discharge port 21 is formed as a horizontally long opening so as to have substantially the same width as the side surface width of the bubble generation tank 2. Further, packing (not shown) is performed on the outer surface of the peripheral portion of the discharge port 21 of the bubble generation tank 2 so that the separated liquid filled inside the reaction tank W to which the fine bubble generation device 1 is attached does not leak. Is given. The discharge port 21 is provided with an opening / closing plate 22 so that the opening amount can be adjusted.
[0021]
As shown in FIGS. 1 and 5, the impeller portion 3 is fixed to a rotating shaft of a motor 31 in which a base end portion of a mixing shaft 32 that is a through cylinder formed of a hollow cylindrical body is fixed to an upper portion of the bubble generation tank 2, The tip of the mixing shaft 32 is located below the center of the bubble generating tank 2. A stirring impeller 33 that is a stirring fin is fixed to the tip of the mixing shaft 32. The impeller 33 is formed by attaching a plurality of blades 35 radially to a disk-shaped plate body 34. Further, an air inflow port 36 is formed at the base end portion of the mixing shaft 32, and the tip of the mixing shaft 32 is opened to the blade 35 of the impeller 33, and the impeller 33 is rotated by rotating the motor 31. Stirs the liquid in the bubble generating tank 2, and external air (a specific gas or air) is introduced from the air inlet 36 to the impeller 33 by the negative pressure generated in the blade 35 portion of the impeller 33 with the stirring. It is formed so that. Although not shown, the air inflow port 36 is provided with a valve capable of controlling the flow rate, and provided with a connecting portion so that a specific gas can flow in, so that the specific gas can flow in. Reference numeral 37 denotes a supporter which is formed of a hollow cylindrical body, is provided coaxially with the rotation axis of the mixing shaft 32 so as to cover the mixing shaft 32, and is fixed to the upper surface 22 of the bubble generating tank 2. Further, a stator 38 is fixed to the lower end of the supporter 37. The stator 38 is installed so that a perforated plate 39 in which a plurality of small-diameter holes are formed in a disk-shaped plate body covers an outer peripheral surface on which the impeller 33 rotates. By installing the stator 38 on the outer peripheral portion of the impeller 33 in this way, the stator 38 can reduce and prevent the accompanying liquid in the bubble generation tank 2 that is generated by the rotation of the impeller 33.
[0022]
The turbine 4 is installed at the lower end of the impeller 33 so as to be coaxial with the rotation shaft of the impeller 33. That is, the shaft 41 is protruded as an extension of the mixing shaft 32. Further, as shown in FIG. 6, a turbine main body 43 formed by fixing a plurality of blades 42 as blades on the lower surface of a disk-shaped plate is fixed to the lower end of the shaft 41. The blade 42 is fixed at an angle with respect to the rotational radiation direction, and is fixed so as to flow outward from the center of rotation by being rotated.
Further, a rectifying cylinder 5 is installed in the lower part of the turbine 4. The flow straightening cylinder 5 has a cylindrical shape, and is fixed to the bottom surface 23 of the bubble generation tank 2 so that the upper end is located immediately below the turbine body 43, and a hole previously drilled between the bottom surface 23 of the bubble generation tank 2 is used for water supply. A mouth 52 is formed. The water supply port 52 is connected to the lower portion of the discharge port 21 by the water suction pipe 51, and the water supply port 52 is opened to the reaction tank W.
[0023]
As shown in FIGS. 1 to 4, the bubble guide plate 6 is formed by installing a plurality of plate-like bodies 61 inclined on the inner wall surface of the bubble generation tank 2. In the first embodiment, the plate-like body 61 forming the inclined surface is arranged in the width direction of one side so that both end portions are between the plate-like bodies 61 installed on the adjacent side faces of the bubble generating tank 2. The two ends of the plate-like body 61 installed on each side surface are continuously provided so as to be integrated with the end portions of the plate-like bodies provided on the adjacent side surfaces. You may provide so that one inclined surface may be formed continuously in a spiral.
[0024]
The operation of the first embodiment formed as described above will be described below.
When the liquid to be separated, which is a separation target, is filled in the reaction tank W installed adjacent to the fine bubble generating device 1, the fine bubble generating device 1 is also filled with the liquid to be separated. At this time, the liquid to be separated is filled so that the liquid level of both tanks is at least above the impeller 33. In this embodiment, polyaluminum chloride (PAC) is previously added to the liquid to be separated at a concentration of about 20 mg / l. This polyaluminum chloride (PAC) has the effect of assisting the aggregation of colloidal components contained in the polluted water. Furthermore, it also has a treatment effect on polluted water containing heavy metals, such as expanding the optimum coagulation pH range of heavy metals in polluted water, lowering the residual metal ion concentration in polluted water, and increasing the clarity of polluted water. .
[0025]
When the motor 31 starts rotating in this state, the impeller 33 and the turbine 4 rotate. When the impeller 33 rotates, a negative pressure is generated in the impeller 33 portion by the rotation of the blades 35 provided on the impeller 33, and when the rotation speed of the impeller 33 increases, the negative pressure generated in the impeller 33 portion eventually causes the negative pressure from the air inlet 36. Gas is drawn into the impeller 33 through the mixing shaft 32. At this time, the blades 35 provided on the impeller 33 divide the gas drawn into the impeller 33 and generate bubbles B. The bubbles B generated at this time include relatively large bubbles B1 and fine bubbles B2. Specifically, the bubbles B are generated by the impeller unit 3 so as to include a large number of fine bubbles B2 having a diameter of 0.5 mm or less, which are attached to the separation target in the liquid and are not destroyed even after the generation, The fine bubble B2 functions as an effective bubble B that adheres a separation target if the diameter is approximately 2 mm or less. Further, a bubble having a diameter larger than that of the fine bubble B2 is a relatively large bubble B1, and is not an effective bubble B to which a separation target is attached. Although the boundary between the diameters of the fine bubbles B2 and the relatively large bubbles B1 is about 2 mm, the smaller the diameter of the fine bubbles B2, the more effective the bubbles B1 function. If it is close to 2 mm, it functions as a bubble B that is effective to some extent, but if it has a diameter of 5 mm, it becomes a bubble B that is hardly effective.
[0026]
The reason why fine bubbles are effective in the floating separation method or the foam separation method can be understood from the following reasons. That is, when there is polluted water in which large-sized bubbles are dispersed and contaminated water in which small-sized bubbles are dispersed, and the ratio of the volume of bubbles dispersed in the liquid to the volume of the liquid is the same, the small diameter is reduced. The polluted water in which the bubbles are dispersed has a larger boundary area between the gas and the liquid than the polluted water in which the larger bubbles are dispersed, which is effective in promoting the adhesion of the substance to be removed. In addition, the mixture of the liquid phase and the solid phase has an influence as a mechanical function, and when the bubble diameter is small, the bubbles do not coalesce or absorb. Furthermore, if the bubble diameter is small, the ascent rate is very slow and the dispersibility in the horizontal direction and the like increases. And since the dispersibility increases, it becomes possible to stay for a long time, so that the solubility of the gas phase in the liquid phase increases, for example, the pH change due to the increased amount of dissolved oxygen and the oxidation rate in the liquid phase Increase.
[0027]
On the other hand, the turbine 4 rotates from the water supply port 52 at the lower end of the rectifying cylinder 5 to the discharge port 21 of the bubble generating tank 2 via the opening at the upper end of the rectifying 5 and the outside of the rectifying cylinder 5 in the bubble generating tank 2. Generates a water flow in the liquid. The water flow generated at this time affects a small area near the discharge port 21 and the water supply port 52 of the reaction tank W, but does not significantly affect many liquids in the reaction tank W.
[0028]
When the impeller 33 and the turbine 4 rotate in this manner, when the bubbles B are generated and a water flow is generated, the relatively large bubbles B1 rise and are destroyed in the generated bubbles B, and the fine bubbles B2 are generated at the discharge port. The phenomenon of being transported to the discharge port 21 without breaking by the water flow to the 21 occurs.
At this time, the fine bubbles B <b> 2 are moved to the lower discharge port 21 while being guided by the bubble guide plate 6. When the turbine 4 rotates in the bubble generating tank 2, the guide of the bubble B 2 by the bubble guide plate 6 moves the polluted water in the radial direction of the turbine 4. The bubbles B generated by the above are mixed and moved below the bubble guide plate 6. At this time, many of the relatively large bubbles B1 have a high buoyancy, so that they are moved upward rather than immediately to the turbine 4 side. Then, since the moved fine bubble B2 continues to be moved along the side surface of the bubble generating tank 2, it is moved downward along the spiral in which the bubble guide plate 6 is installed, and is eventually moved to the discharge port 21. In addition, the fine bubble B2 that has moved downward but moved upward again comes into contact with the lower surface of the bubble guide plate 6 while being lifted, and is guided downward and discharged from the discharge port 21 into the reaction tank W. Will be. At this time, the amount of bubbles discharged can be adjusted by the opening / closing amount of the discharge port 21 by the opening / closing plate 22.
[0029]
The fine bubbles B2 supplied from the discharge port 21 to the reaction tank W without being destroyed by the water flow are widely distributed and floated in the liquid to be separated.
In the reaction tank W, the separation target in the liquid is attached by the fine bubbles B2 supplied from the discharge port 21.
[0030]
In this embodiment, the fine bubble generator 1 is installed so as to be adjacent to the reaction vessel W. However, as in the second embodiment shown in FIG. Even if a double-structured tank is formed so as to be located inside and the fine bubble generating device 1 is functioned, the same effect can be exhibited. In this case, the water absorption pipe 51 need not be installed. In this embodiment, the bubble generation tank 2 has a casing shape, but may be formed to have a cylindrical shape, and the shape can be appropriately selected according to the reaction tank W to be installed. Furthermore, in the fine bubble generating device 1 according to the second embodiment, the opening degree of the opening / closing plate 22 provided in the discharge port 21 can be varied for each discharge port 21. It is possible to supply more fine bubbles B2 in the reaction tank W on the side that requires more fine bubbles.
[0031]
Furthermore, in this embodiment, the bubble guide plate 6 is provided so as to guide the movement of the fine bubbles B2 to the discharge port 21. However, the bubble guide plate 6 is not provided, and the water flow generated by the fine bubbles B2 is not provided. You may form so that it may be supplied to the reaction tank W from the discharge outlet 21 directly.
[0032]
Next, a third embodiment will be described with reference to FIG.
In the third embodiment, the fine bubble generating apparatus 1 includes a bubble generating tank 2, an impeller unit 3 that generates bubbles in the bubble generating tank 2, a turbine 4 provided below the impeller unit 3, and a bubble generating tank. The bubble guide plate 6 fixed to the wall surface that is the inner surface of 2 is the same as in the first embodiment, but the rectifying cylinder 5 is not installed.
Therefore, in the third embodiment, the water supply port 52 is opened at the bottom surface 22 of the bubble generation tank 2 in which the rectifying cylinder 5 is installed in the first embodiment, and is supplied via the water absorption pipe 51. To be formed.
[0033]
In the third embodiment formed in this way, the rectifying cylinder 5 is not provided, so that when the turbine 4 rotates, a vortex is generated below the turbine 4, but the generated vortex is a fine bubble B2. By using it in the rotation region of the turbine 4 that does not hinder the generation of the bubbles, it is possible to generate the fine bubbles B2.
The third embodiment is the same as the first embodiment except for the above.
Also, in the third embodiment, a double-structured tank is formed so that the fine bubble generator 1 is located in the reaction tank W as in the second embodiment, and the fine bubble generator 1 is Even if it is made to function, the same effect can be exhibited.
[0034]
【The invention's effect】
According to the present invention, it is possible to selectively take out only the fine bubbles that can float in the liquid for a long time so as to be able to react with the separation target contained in the liquid for a long time, and the effect that the separation can be performed efficiently. Play.
[Brief description of the drawings]
FIG. 1 is a front explanatory view of a fine bubble generating apparatus according to an embodiment of the present invention. FIG. 2 is a front explanatory view showing a state in which the apparatus is applied to a polluted water tank. Fig. 4 is an explanatory diagram of a side surface in which the section is enlarged. Fig. 4 is an explanatory diagram of the AA line in Fig. 3. Fig. 5 is an explanatory diagram of an impeller part which is a part. FIG. 8 is a front view of a microbubble generator according to a third embodiment.
W Reaction tank B Bubble B1 Relatively large bubble B2 Fine bubble 1 Fine bubble generator 2 Bubble generation tank 21 Discharge port 22 Opening / closing plate 3 Impeller portion 31 Motor 32 Mixing shaft 33 Impeller 34 Plate body 35 Blade 36 Air inlet 37 Supporter 38 Stator 39 Perforated plate 4 Turbine 41 Shaft 42 Blade 43 Turbine body 5 Rectifier cylinder 51 Water absorption pipe 52 Water supply port 6 Bubble guide plate 61 Plate-shaped body

Claims (4)

It consists of a hollow container in which polluted water is put, and a bubble generating tank with a discharge port opened at the bottom,
A stirring fin that can rotate in the polluted water is provided at the tip, the stirring fin and the outside of the bubble generation tank communicate with each other through the cylinder, and the stirring fin rotates from the outside of the bubble generation tank via the through cylinder by rotating in the polluted water. An impeller capable of generating bubbles containing fine bubbles by gas; and
A turbine is provided below the impeller portion and coaxially with the rotation shaft of the impeller portion, a plurality of blades are fixed to the lower surface of the disc, and a turbine that generates a water flow by rotating,
A water supply opening that is opened at the bottom of the bubble generation tank below the turbine and can absorb water into the bubble generation tank;
A fine bubble supply device comprising: It consists of a hollow container in which polluted water is put, and a bubble generating tank with a discharge port opened at the bottom,
A stirring fin that can rotate in the polluted water is provided at the tip, the stirring fin and the outside of the bubble generation tank communicate with each other through the cylinder, and the stirring fin rotates from the outside of the bubble generation tank via the through cylinder by rotating in the polluted water. An impeller capable of generating bubbles containing fine bubbles by gas; and
A turbine is provided below the impeller portion and coaxially with the rotation shaft of the impeller portion, a plurality of blades are fixed to the lower surface of the disc, and a turbine that generates a water flow by rotating,
A bubble guide plate made of a plate-like body and fixed in a spiral shape on the inner surface of the bubble generation tank,
A water supply opening that is opened at the bottom of the bubble generation tank below the turbine and can absorb water into the bubble generation tank;
A fine bubble supply device comprising: It consists of a hollow container in which polluted water is put, and a bubble generating tank with a discharge port opened at the bottom,
A stirring fin that can rotate in the polluted water is provided at the tip, the stirring fin and the outside of the bubble generation tank communicate with each other through the cylinder, and the stirring fin rotates from the outside of the bubble generation tank via the through cylinder by rotating in the polluted water. An impeller capable of generating bubbles containing fine bubbles by gas; and
A turbine is provided below the impeller portion and coaxially with the rotation shaft of the impeller portion, a plurality of blades are fixed to the lower surface of the disc, and a turbine that generates a water flow by rotating,
A rectifying cylinder provided below the turbine, having a cylindrical shape, and having a lower end opening forming a water supply port to the bubble generation tank,
A fine bubble supply device comprising: It consists of a hollow container in which polluted water is put, and a bubble generating tank with a discharge port opened at the bottom,
A stirring fin that can rotate in the polluted water is provided at the tip, the stirring fin and the outside of the bubble generation tank communicate with each other through the cylinder, and the stirring fin rotates from the outside of the bubble generation tank via the through cylinder by rotating in the polluted water. An impeller capable of generating bubbles containing fine bubbles by gas; and
A turbine is provided below the impeller portion and coaxially with the rotation shaft of the impeller portion, a plurality of blades are fixed to the lower surface of the disc, and a turbine that generates a water flow by rotating,
A rectifying cylinder provided below the turbine, having a cylindrical shape, and having a lower end opening forming a water supply port to the bubble generation tank,
A bubble guide plate made of a plate-like body and fixed in a spiral shape on the inner surface of the bubble generation tank,
A fine bubble supply device comprising:

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