JP2017064685A - Microbubble generator, microgeneration apparatus, and system of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a microbubble generator which generates microbubbles efficiently and effectively by making shear force strongly act on bubbles in a gas-liquid mixture fluid to tear bubbles off, a microbubble generation apparatus, and a microbubble generation system.SOLUTION: A microbubble generator has a first connector 13b connected to a discharge pipe 10 that introduces a gas-liquid mixture fluid 8b, a body 15 with a first shear chamber 25 formed by being connected to this first connector 13b to extend vertically to the longitudinal direction of the first connector 13b, a second chamber 27 formed by being connected to this body 15 via the second connector 20 to bend vertically to the longitudinal direction of the second connector 20, and a nozzle 19 with a nozzle hole 22 formed in an end of this second chamber 27.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a microbubble generator, a microbubble generator, and a system for generating microbubbles.

  In recent years, techniques for applying the characteristics of fine bubbles such as microbubbles having a bubble diameter of a micrometer or nanobubbles having a nanometer have been developed.

Many technologies related to the generation of fine bubbles have been developed. For example, in Patent Document 1, a gas-liquid swirl flow is provided while providing a donut-shaped rectifying plate in a cylindrical container with the name “fine bubble supply device”. An apparatus is disclosed in which fine bubbles are generated to generate fine bubbles together with liquid from gas-liquid outlet holes provided at both ends of a cylindrical container.
In the invention disclosed in Patent Document 1 configured as described above, suction gas is introduced from the rectifying plate provided in the cylindrical container toward the communication opening, and the liquid is efficiently introduced while introducing the gas. It is possible to generate fine bubbles by distributing them throughout the swirling flow.

Further, Patent Document 2 includes a fluid swirl chamber having a tubular member and end wall members at both ends of the tubular member under the name of “fine bubble generating device”, and has a width on the inner peripheral surface of the tubular member. And the microbubble generator provided with the some annular groove whose depth is 1 mm or less is disclosed.
In the invention disclosed in Patent Document 2 configured as described above, the gas-liquid mixed fluid introduced into the fluid swirl chamber can be turned into a swirl flow in a state where it does not spread so much in the axial direction. Can be efficiently performed.

JP 2002-11335 A JP 2008-272739 A

  However, in the techniques disclosed in Patent Document 1 and Patent Document 2, the gas-liquid mixed fluid is a gas whose liquid bubbles are refined by a shearing force caused by a swirling flow, and is given by a sudden change in the direction of the flow path. However, there is a problem that there is room for improving the mechanism for generating a large amount of finer bubbles by efficiently and effectively reducing the size of the bubbles.

The present invention has been made in response to such a conventional situation, and by making the direction of the flow path abruptly change while simplifying the structure, a shearing force is strongly applied to the bubbles in the gas-liquid mixed fluid. An object of the present invention is to provide a fine bubble generator, a fine bubble generation device, and a fine bubble generation system that efficiently and effectively generate fine bubbles by tearing bubbles.
In addition, a fine bubble generator, a fine bubble generation device, and a fine bubble that generate fine bubbles more efficiently and effectively in a structure that is simplified by continuously forming two stages of rapid changes in the direction of the flow path Another object is to provide a generation system.

In order to achieve the above object, a fine bubble generator according to a first aspect of the present invention includes a first connection portion connected to a discharge pipe for introducing a gas-liquid mixed fluid, and the first connection portion connected to the first connection portion. A main body provided with a first shear chamber formed by extending perpendicularly to the longitudinal direction of one connecting portion, and connected to the main body portion via a second connecting portion; A second shear chamber formed by bending perpendicularly to the longitudinal direction and a nozzle provided with a nozzle hole formed at an end of the second shear chamber are provided.
In the fine bubble generator having the above-described configuration, the gas-liquid mixed fluid receives a shear force in the first shear chamber to generate fine bubbles, and then the first shear chamber through the second connection portion causes the first bubble to be generated. By being led to the second shear chamber different from the direction of the flow path in the shear chamber, a continuous two-stage shear force is applied due to a sudden change in the continuous two-stage flow path. Therefore, it acts to apply a shearing force to the fine bubbles to promote further miniaturization, and to act to generate new fine bubbles in the gas-liquid mixed fluid.

The fine bubble generator according to a second aspect of the invention is the fine bubble generator according to the first aspect of the invention, wherein the nozzle is also used as the second connection part, and the main body part and the nozzle are connected, The shear chamber 2 is formed in a cylindrical shape that bends perpendicularly to the longitudinal direction of the communication hole that communicates the main body portion and the nozzle, instead of the longitudinal direction of the second connection portion. The hole is formed from the main body portion toward a tangential direction of a cylindrical inner peripheral surface of the second shear chamber.
In the fine bubble generator configured as described above, since the nozzle also serves as the second connection portion, the distance between the first shear chamber and the second shear chamber is further shortened. Accordingly, the action of the shearing force is strengthened, and the action of the first invention is further enhanced.
Moreover, the second shear chamber is formed in a cylindrical shape, and the communication hole of the nozzle is drilled from the main body portion toward the tangential direction of the cylindrical inner peripheral surface of the second shear chamber. When entering the second shear chamber, it acts so that a turning force works, and the shearing force acts by the turning force.

The fine bubble generator according to a third aspect of the present invention is the fine bubble generator according to the first or second aspect of the present invention, wherein at least a part of the fine bubble generator is inserted into the first connection portion and gas-liquid mixing is performed from the discharge pipe. A fine bubble increasing and generating portion having a venturi tube that introduces a fluid and discharges the fluid into the first shear chamber, and the venturi tube is discharged into the first shear chamber from a suction portion provided in the throttle portion; A part of the gas-liquid mixed fluid is sucked again and discharged from the discharge part of the venturi tube.
In the fine bubble generator configured as described above, in addition to the action of the first or second invention, a part of the gas-liquid mixed fluid containing fine bubbles generated in the first shear chamber is supplied to the throttle part of the venturi tube, that is, the throat. By sucking in from the section and discharging from the discharge section, it acts to add a shearing force inside the venturi tube. The shearing force acts to further refine the fine bubbles in the gas-liquid mixed fluid, and also acts to generate new fine bubbles.

According to a fourth aspect of the present invention, there is provided a fine bubble generator, wherein the fine bubble generator according to any one of the first to third inventions is disposed in a container having a discharge unit, 1 is used as a suction part of the container, and the fine bubbles generated by the fine bubble generator are temporarily stored in the container and discharged from the discharge part.
In the fine bubble generating apparatus configured as described above, in addition to the action of any one of the first to third inventions, the container acts to protect the fine bubble generator, and the fine bubbles generated by the fine bubble generator Air bubbles are prevented from escaping and discharged from the discharge part of the container.

According to a fifth aspect of the present invention, there is provided a micro-bubble generating system comprising: a pump for mixing a liquid sucked from a suction pipe connected to a liquid storage tank and a gas sucked from the suction pipe to discharge a gas-liquid mixed fluid; And a discharge pipe connecting the liquid storage tank, and a fine bubble generator installed at an end of the discharge pipe on the liquid storage tank side, the fine bubble generator comprising: It is a fine bubble generation system characterized by being one of the first to third fine bubble generators.
In the fine bubble generating system configured as described above, in addition to the effects of the first to third inventions, the liquid storage tank acts to supply liquid through the suction pipe, and the suction pipe sucks and supplies the gas. The pump acts to mix the liquid and gas and supply the gas-liquid mixed fluid.

And the fine bubble production | generation system which is 6th invention is a pump which mixes the liquid sucked from the suction piping connected to the liquid storage tank, and the gas sucked from the suction piping, and discharges gas-liquid mixed fluid, A fine bubble generation system comprising: a discharge pipe connecting the pump and the liquid storage tank; and a fine bubble generation device installed at an end of the discharge pipe on the liquid storage tank side, wherein the fine bubble generation apparatus Is a microbubble generator characterized by being a fourth microbubble generator.
In the fine bubble generating system configured as described above, in addition to the operation of the fourth aspect of the invention, the liquid storage tank operates to supply liquid via the suction pipe, and the suction pipe operates to suck and supply gas. The pump acts to mix the liquid and the gas and supply the gas-liquid mixed fluid.

  In the fine bubble generator according to the first aspect of the present invention, the fine bubbles can be further miniaturized by the shearing force in two consecutive stages in different directions accompanying a sudden change in the two continuous flow paths. In addition, new fine bubbles can be continuously generated in the gas-liquid mixed fluid. That is, it is possible to promote the bubble miniaturization more effectively and efficiently.

In the fine bubble generator according to the second aspect of the present invention, since the distance between the first shear chamber and the second shear chamber is further shortened, a rapid change in the continuous two-stage flow path is achieved. Since this becomes more abrupt, the effect of the first invention can be further enhanced.
Further, since the second shear chamber is formed in a cylindrical shape so that a swirling force works when the gas-liquid mixed fluid enters the second shear chamber, the microbubbles are further updated by the shear force by the swirling force. In this respect, the effect of the first invention can be further enhanced.

  In the fine bubble generator according to the third aspect of the present invention, in addition to the effects of the first and second aspects, a shearing force can be applied inside the venturi tube, so that the shear is generated in the first shear chamber. The fine bubbles generated under the force are further refined, and new fine bubbles can be generated in the gas-liquid mixed fluid. And since it is guide | induced to the 2nd shear chamber after that, it is possible to add a shearing force further. That is, it is possible to produce a rapid change of the three-stage flow path inside the compact fine bubble generator, and to effectively and efficiently generate the fine bubbles by applying the three-stage shear force.

  In the fine bubble generating apparatus according to the fourth aspect of the present invention, in addition to the effects of the first to third aspects, the fine bubble generator can be protected by being housed in the container. Although the fine bubbles generated by the generator are highly likely to dissipate in a plurality of directions, the fine bubbles can be collectively discharged from the discharge unit by being stored in a container provided with the discharge unit.

  In the fine bubble generating system according to the fifth aspect of the present invention, the same effects as those of the first to third aspects can be exhibited.

  In the fine bubble generating system according to the sixth aspect of the present invention, the same effect as that of the fourth aspect can be exhibited.

It is a lineblock diagram of the fine bubble generation system concerning a 1st embodiment of the present invention. (A) of the fine bubble generator which concerns on the 2nd Embodiment of this invention is a front structural drawing, (b) is a side structural drawing. (A) of a microbubble generator concerning a 3rd embodiment of the present invention is a front structure figure, and (b) is a side structure figure. (A) of the microbubble increase production | generation part of the microbubble generator which concerns on the 4th Embodiment of this invention is a front structural drawing, (b) is a side structural drawing. (A) of the micro bubble generator concerning the 4th Embodiment of this invention is a front assembly structure figure, (b) is a side assembly structure figure. It is a side surface structure figure of the fine bubble production | generation apparatus which concerns on the 5th Embodiment of this invention. It is a front structural drawing of the fine bubble production | generation apparatus which concerns on the 5th Embodiment of this invention.

The fine bubble generating system according to the first embodiment of the present invention will be described below with reference to FIG.
FIG. 1 is a configuration diagram of a fine bubble generating system according to a first embodiment of the present invention.
In FIG. 1, the fine bubble generating system 1 is mainly composed of a vortex pump 2 and a liquid storage tank 5 for supplying a liquid 8 to the vortex pump 2. The vortex pump 2 has a structure including an impeller 4 in a casing 3 and includes a suction hole 7 and a discharge hole 9.
In addition, a suction pipe 6 for supplying the liquid 8 from the liquid storage tank 5 to the vortex pump 2, a suction pipe 12 a branched and connected from the suction pipe 6 for supplying the gas 8 a to the vortex pump 2, It has a discharge pipe 10 that generates a gas-liquid mixed fluid 8 b in the pump 2 and returns it to the liquid storage tank 5.
Further, the suction pipe 12a is provided with a suction hole 12 for sucking air from the atmosphere, and the gas 8a sucked from the suction hole 12 is swirled in the middle of the suction pipe 12a without the liquid 8 flowing backward from the suction pipe 6. A check valve 11 is inserted to be supplied to the pump 2.
The liquid 8 is generally water, and the gas 8a is generally air. However, the liquid 8 and the gas 8a in the gas-liquid mixed fluid 8b can be selected in various ways depending on the use of the fine bubbles.
Further, in the liquid storage tank 5, a fine bubble generator 14 is installed with respect to the discharge pipe 10 via the first connection portion 13. Alternatively, instead of the fine bubble generator 14, a fine bubble generation device 41 described later is installed.

In the fine bubble generating system 1 configured as described above, the liquid 8 stored in the liquid storage tank 5 is the gas 8a supplied from the suction pipe 12a in the middle of the suction pipe 6, and the suction on the downstream side of the suction pipe 12a. While mixing in the pipe 6, the gas-liquid mixed fluid 8 b is supplied to the suction hole 7 of the vortex pump 2.
The gas-liquid mixed fluid 8b agitated and pressurized by the impeller 4 of the vortex pump 2 is supplied to the discharge pipe 10 from the discharge hole 9, and the fine bubbles are generated in the fine bubble generator 14 installed in the liquid storage tank 5. It is generated and discharged into the liquid storage tank 5.
According to the fine bubble generating system 1 having such a configuration, it is possible to generate the gas-liquid mixed fluid 8b that has been sufficiently stirred and pressurized, and is generated by the fine bubble generator 14 or the fine bubble generator 41. The fine bubbles can be generated, and the liquid storage tank 5 can be filled with the fine bubbles.

Hereinafter, a fine bubble generator according to a second embodiment of the present invention will be described with reference to FIG. 2A is a front structural view and FIG. 2B is a side structural view of a fine bubble generator according to a second embodiment of the present invention.
2 (a) and 2 (b), the fine bubble generator 14a includes a first connection portion 13a for connection to the discharge pipe 10 shown in FIG. 1, and the discharge of the first connection portion 13a. A rectangular parallelepiped main body 15 having a pair of cylindrical sockets 16 connected to another end different from the end connected to the pipe 10 and formed on each of its four side surfaces, and the main body The nozzle 19 is connected to the 15 sockets 16 through the second connection part 20.
A socket hole 17 is formed in the side wall of the main body portion 15 at a position coinciding with the socket 16, and a cylindrical flow path and a first shear chamber formed in the second connection portion 20 of the nozzle 19. 25 communicates. Further, the flow path in the second connection portion 20 is connected to a second shear chamber 27 formed in the header portion 21 of the nozzle 19. Nozzle holes 22 are formed at both ends of the header portion 21 at the center of the end face, and the gas-liquid mixed fluid 8b introduced into the second shear chamber 27 is discharged into the liquid storage tank 5 from the nozzle holes 22. The

The gas-liquid mixed fluid 8b introduced into the first shear chamber 25 from the inflow hole 18a of the first connection portion 13a through the discharge pipe 10 is the center in the longitudinal direction (inflow direction) of the first connection portion 13a. It is introduced into the first shear chamber 25 in the main body 15 in which a flow path extending in a direction perpendicular to the axis is formed.
Since the direction of the flow path formed in the first shear chamber 25 is suddenly changed from the flow path formed by the first connection portion 13a, the shear force acts on the gas-liquid mixed fluid 8b and is fine. Bubbles are generated.
The gas-liquid mixed fluid 8b expanded in the first shear chamber 25 is formed in the header portion 21 of the nozzle 19 from the socket hole 17 and the socket 16 through the second connection portion 20, respectively. 27 flows in.
The flow path formed by the socket hole 17, the socket 16 and the second connection part 20 and the flow path formed by the header part 21 of the nozzle 19 are arranged perpendicular to the longitudinal direction (flow path direction), respectively. Has been.
Accordingly, since the direction suddenly changes from the flow path formed by the socket hole 17, the socket 16, and the second connection portion 20 to the flow path of the second shear chamber 27, air bubbles again in the second shear chamber 27. Refinement occurs. That is, the refinement of bubbles is promoted in two successive stages of the first shear chamber 25 and the second shear chamber 27, the refinement is further enhanced for the fine bubbles, and the gas-liquid mixed fluid 8b It is possible to newly generate fine bubbles.

In the present embodiment, a screw groove portion can be formed as shown by the symbol A with respect to the end of the first connecting portion 13a on the side connected to the discharge pipe 10, and can be screwed to the discharge pipe 10 so as to be detachable. I did it. This is formed in order to remove the fine bubble generator 14a for maintenance or replacement, but it may be connected to the discharge pipe 10 by welding or the like.
In the present embodiment, a total of eight sockets 16 are provided on each of the four side surfaces of the main body 15, but this number is not particularly limited, and the shape of the main body 15 and the first connection are not limited. You may increase / decrease suitably according to the flow volume of the gas-liquid mixed fluid 8b which flows in from the part 13a.
Further, although a flat rectangular parallelepiped is selected as the shape of the main body portion 15, it may be a flat cylindrical body or a rectangular column with a horizontal cross section. In the present embodiment, the header portion 21 and the second shear chamber 27 of the nozzle 19 have a rectangular cross section perpendicular to the longitudinal direction, but may be formed in a cylindrical shape.

Next, a fine bubble generator according to a third embodiment of the present invention will be described with reference to FIG. FIG. 3A is a front structural view and FIG. 3B is a side structural view of a fine bubble generator according to a third embodiment of the present invention.
3A and 3B, the fine bubble generator 14b includes a first connection portion 13b for connecting to the discharge pipe 10 shown in FIG. 1, and the discharge of the first connection portion 13b. A rectangular parallelepiped main body 23 connected to another end different from the end connected to the pipe 10 is provided. The nozzles 29 connected to the four side surfaces of the main body portion 23 via the socket 16 (see FIGS. 2A and 2B) in the second embodiment are directly joined to the side surfaces. Yes. Therefore, the communication hole 26a of the main body 23 and the communication hole 26b of the nozzle 29 are aligned, and the first shear chamber 25 formed in the main body 23 and the second shear chamber 27 formed in the nozzle 29 are formed. The microbubble generator 14a according to the second embodiment is connected at a shorter distance. Moreover, the nozzle 29 does not include the tubular second connection portion 20 provided in the nozzle 19 of the second embodiment, and the communication hole 26 b of the nozzle 29 exhibits the function of the second connection portion 20. Since it is composed only of the header portion 24 having the nozzle hole 28 drilled in the center of the side surfaces at both ends, it is connected to the main body portion 23 at a shorter distance.
Further, the second shear chamber 27 is formed in a cylindrical shape, and the communication hole 26 a of the main body 23 and the communication hole 26 b of the nozzle 29 are tangential to the cylindrical inner peripheral surface of the second shear chamber 27 from the main body 23. It is drilled toward. The tangential direction of the inner circumferential surface of the cylinder means the tangential direction with respect to a circle formed by a cross section perpendicular to the central axis of the cylinder.
The main body 23 and the nozzle 29, and the main body 23 and the first connecting portion 13b may be joined by fillet welding or the like at a location indicated by a black triangle in the drawing.

The gas-liquid mixed fluid 8b introduced into the first shear chamber 25 from the inflow hole 18b of the first connection portion 13b through the discharge pipe 10 is the center in the longitudinal direction (inflow direction) of the first connection portion 13b. It is introduced into the first shear chamber 25 in the main body 23 in which a flow path extending in a direction perpendicular to the axis is formed.
Similarly to the fine bubble generator according to the second embodiment, the direction of the flow path formed in the first shear chamber 25 suddenly changes from the flow path formed by the first connection portion 13b. Therefore, the shear force acts on the gas-liquid mixed fluid 8b to generate fine bubbles.
The gas-liquid mixed fluid 8b expanded in the first shear chamber 25 is formed in the header portion 24 through the communication hole 26a of the main body portion 23 and the communication hole 26b of the header portion 24 of the nozzle 29, respectively. Flows into the shear chamber 27. At that time, the gas-liquid mixed fluid 8b flows from the first shear chamber 25 of the main body 23 into the second shear chamber 27 of the nozzle 29 while turning counterclockwise in FIG.
The flow path formed by these two communication holes 26a and 26b and the flow path formed by the header portion 24 of the nozzle 29 are arranged perpendicular to the longitudinal direction (flow path direction), respectively. In order to be discharged from the nozzle hole 28 formed in the center of both end faces of the header portion 24, it is arranged so as to generate a swirling flow from the cylindrical outer peripheral surface toward the inner peripheral surface.
Therefore, the direction suddenly changes from the flow path formed by the communication holes 26 a and 26 b to the flow path of the second shear chamber 27, and further, a shearing force is generated by the turning force in the second shear chamber 27. In the second shear chamber 27, however, the bubbles become finer again. That is, it can be said that the two-stage bubbles are continuously refined only in the second shear chamber 27.
Therefore, further miniaturization of the fine bubbles is promoted, and new fine bubbles can be generated in the gas-liquid mixed fluid 8b. In addition, since the length of the flow path (communication holes 26a, 26b) for communicating the first shear chamber 25 and the second shear chamber 27 is shorter than that of the second embodiment, the direction of the flow path changes more rapidly. Will occur.
After the bubble miniaturization is promoted in two successive stages of the first shear chamber 25 and the second shear chamber 27, the gas-liquid mixed fluid 8 b enters the liquid storage tank 5 from the nozzle holes 28 at both ends of the header portion 24. To be released.

In the present embodiment, a thread groove portion as indicated by reference numeral B1 is formed inside the end portion of the first connection portion 13b on the side connected to the discharge pipe 10. This is a thread groove portion B1 for mounting the fine bubble increase generation portion described with reference to FIG. 4 in the inflow hole 18b of the first connection portion 13b. Of course, as in the second embodiment, a screw groove portion may be provided on the outer periphery so that the discharge pipe 10 can be detachably screwed.
In the present embodiment, four nozzles 29 are provided in accordance with the outer shape of the main body portion 23. However, the number of nozzles 29 is not particularly limited, and from the shape of the main body portion 23 and the first connection portion 13b. You may increase / decrease suitably according to the flow volume of the gas-liquid mixed fluid 8b which flows in. Further, in FIG. 3B, the communication hole 26a of the main body 23 and the communication hole 26b of the nozzle 29 are provided eccentrically on the side close to the first connection part 13b, that is, on the upstream side. The connecting portion 13b may be provided eccentric to the far side (downstream side).
Furthermore, although a flat rectangular parallelepiped is selected as the shape of the main body 23, it may be a flat cylindrical body or a rectangular column having a horizontal cross section.

With reference to FIG. 4 and FIG. 5, a description will be given of a fine bubble increase generation unit of the fine bubble generator according to the fourth embodiment of the present invention. FIG. 4A is a front structural view and FIG. 4B is a side structural view of a fine bubble increasing and generating part of a fine bubble generator according to a fourth embodiment of the present invention. 5A is a front assembly structure diagram and FIG. 5B is a side assembly structure diagram of a fine bubble generator according to a fourth embodiment of the present invention. The fine bubble generator 14c according to the fourth embodiment combines the fine bubble generator 14b according to the third embodiment with the fine bubble increase generation unit 31 shown in FIGS. 4 (a) and 4 (b). Therefore, in FIG. 5, the same components as those shown in FIGS. 3 and 4 are denoted by the same reference numerals, and the description thereof is omitted.
4 (a) and 4 (b), the fine bubble increase generation unit 31 includes a base portion 32 having a thread groove portion C on the inner peripheral portion and an inner peripheral portion of the first connection portion 13b shown in FIG. 3 on the outer peripheral portion. A suction portion 33 having a screw groove portion B2 threadedly engaged with the screw groove portion B1 and having a suction hole 38 in the venturi tube 30 formed therein, a throttle portion 36 following the suction hole 38 in the venturi tube 30 and the throttle portion It has a discharge part 34 in which a discharge hole 35 following 36 is formed. Further, as shown in FIG. 5 (b), when the at least part of the fine bubble increase generation unit 31 is attached to the inside of the first connection unit 13b, the throttle unit 36 is exposed from the first shear chamber 25. A suction hole 37 for sucking the gas-liquid mixed fluid 8b through the inflow hole 18b is provided.
In the present embodiment, the venturi tube 30 is formed inside, and the static pressure is reduced by increasing the flow rate of the gas-liquid mixed fluid 8b from the suction hole 38 to the constricted portion 36, and the first bubble generator 14c of the first microbubble generator 14c is reduced. The gas-liquid mixed fluid 8b is sucked into the throttle portion 36 from the inside of the shear chamber 25 and the inflow hole 18b.
The gas-liquid mixed fluid 8b containing bubbles refined in the first shear chamber 25 of the fine bubble generator 14c is decompressed when being sucked into the throttle portion 36 of the Venturi tube 30, so that the bubbles expand. Thereafter, the flow velocity of the gas-liquid mixed fluid 8b decreases in the discharge hole 35 and the static pressure increases, so that the bubbles receive a compressive force. The bubbles are subjected to shearing force by the decompression expansion and the pressure compression with respect to the series of bubbles, so that the miniaturization is promoted.

Since a flow path that circulates in the first shear chamber 25 and the Venturi tube 30 is formed, the gas-liquid mixed fluid 8b is continuously repeated in both the first shear chamber 25 and the Venturi tube 30. It is possible to receive a shearing force, and further miniaturization is promoted with respect to the fine bubbles, and new fine bubbles can be generated in the gas-liquid mixed fluid 8b.
In addition, as described above, the first shear chamber 25 is guided to the second shear chamber 27 formed in the header portion 24 of the nozzle 29 through the communication holes 26a and 26b. It is possible to receive continuously. Therefore, it is possible to add the venturi tube 30 to the first shear chamber 25 and the second shear chamber 27 in a compact space, and to promote the refinement of bubbles in three stages.
The fine bubble increase generation unit 31 can be inserted into the fine bubble generator 14c to increase the efficiency and effect of generating fine bubbles. In addition, since the microbubble generator 14c is inserted inside the microbubble generator 14c, the outer shape of the microbubble generator 14c is maintained, and the generation of microbubbles per unit volume is efficiently and effectively performed without increasing the volume. Can be promoted.
In the fine bubble generator 14c according to the present embodiment, a thread groove C is formed at the end of the base 32 of the fine bubble increase generation unit 31 on the side opposite to the suction part 33 side. It is formed so as to be detachably connected to the pipe 10, or is formed so as to be connected to the casing 42 of the fine bubble generating device 41 which will be described below with reference to FIGS.
Further, in the fine bubble generator 14 c according to the present embodiment, the suction hole 38 of the venturi tube 30 is formed in the suction part 33 of the fine bubble increase generation part 31, and the throttle part 36 and the discharge hole 35 are formed in the discharge part 34. Although formed, these arrangements are not particularly limited. However, the suction hole 37 needs to be drilled so as to communicate with the throttle portion 36, and the first connection capable of sucking the gas-liquid mixed fluid 8b existing in the first shear chamber 25 at the position of the suction hole 37. Since a gap inside the portion 13b is necessary, the outer diameter of the discharge portion 34 is made smaller than the outer diameter of the suction portion 33 to secure a flow path, or the first shear chamber 25 and the suction hole 37 are communicated with each other. It is necessary to prepare a separate flow path or the like.
In the present embodiment, the microbubble generator 31 is attached to the microbubble generator 14b according to the third embodiment, but the first of the microbubble generator 14a according to the second embodiment. The diameter of the connecting portion 13a may be increased, and the fine bubble increase generating portion 31 may be attached thereto.

Finally, a microbubble generator according to a fifth embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a side structural view of a fine bubble generating device according to the fifth embodiment of the present invention, and FIG. 7 is a front structural view of the fine bubble generating device according to the fifth embodiment of the present invention. is there.
6 and 7, the fine bubble generating device 41 accommodates the fine bubble generator 14 c according to the fourth embodiment of the present invention in a casing 42 including a flange 43, and includes the flange 43 and a discharge pipe 45. The flange 44 is tightened by inserting a bolt into the bolt hole 49.
The fine bubble increase generation unit 31 screws the screw groove portion C formed on the inner periphery of the base portion 32 and the screw groove portion D formed in the connection pipe 46. Further, the connection pipe 46 is fixed by screwing the screw groove part E and the screw groove part D formed in the first connection part 13 c provided on the discharge pipe 10 side of the casing 42.
In this way, the fine bubble increase generation unit 31 is fixed and accommodated in the casing 42. In addition, you may provide the insertion member 47 between the base 32 of the fine bubble increase production | generation part 31, and the 1st connection part 13c. By providing the insertion member 47, the relative position between the length of the connection pipe 46 and the length of the first connection portion 13c can be easily set, and at the same time, it can be easily attached and detached by maintenance or the like.
In the fine bubble generating device 41 configured as described above, the gas-liquid mixed fluid 8b supplied from the discharge pipe 10 is introduced from the suction hole 48 of the first connecting portion 13c, and further inside the fine bubble increasing and generating portion 31. The venturi tube 30 leads to the effect of the fine bubble increasing generation unit 31 already described as the fourth embodiment and the effect of the fine bubble generator 14b described as the third embodiment, and the casing. The fine bubbles can be retained in the fine bubble filling chamber 51 in 42.
The fine bubbles staying in the fine bubble filling chamber 51 are discharged from the discharge hole 50 of the discharge pipe 45.

In the fine bubble generator 14 c, fine bubbles are diffused radially from the nozzle holes 28 formed at both ends of the nozzle 29 around the main body 23, whereas in the fine bubble generator 41, the inside of the casing 42 Since the fine bubble generator 14c is accommodated in the discharge pipe 45, it can be discharged from the discharge hole 50 of the discharge pipe 45 with directivity.
Further, since the fine bubbles generated by the fine bubble generator 14c are retained and released in the fine bubble filling chamber 51 of the casing 42, the homogenized fine bubbles can be stably supplied.
Furthermore, the effect that the casing 42 protects the fine bubble generator 14c can also be exhibited.

  In the present embodiment, the fine bubble generator 14c is accommodated in the casing 42 as the fine bubble generator 41, but of course, only the fine bubble generator 14b or the fine bubble generator 14a may be accommodated. Even if any of the fine bubble generators 14a to 14c is accommodated, the effects related to the fine bubble generation device 41 described above can be exhibited.

  As described above, in the fine bubble generator, the fine bubble generation device, and the fine bubble generation system according to the embodiment of the present invention, the rapid change in the direction of the flow path is caused by the first shear chamber and the second shear chamber. By forming these two stages, fine bubbles can be generated more efficiently and effectively in a simplified structure. In addition, in a fine bubble generator equipped with a fine bubble increase generation unit, a gas-liquid mixed fluid containing fine bubbles is sucked into a throttle unit using a Venturi tube, and a shearing force is applied by decompression expansion and pressure compression. Can be more efficiently and effectively promoted. Furthermore, in the fine bubble generating apparatus, it is possible to stably supply the homogenized fine bubbles while giving direction to the discharge of the fine bubbles generated by the fine bubble generator.

  The invention described in claims 1 to 6 of the present invention includes a basic apparatus for dissolving a hardly soluble gas in a liquid, a culture pond for aerobic microorganisms, a fish farm, aquatic plants, It is used for an air supply device or the like in a plant cultivation site such as algae. Moreover, it is utilized as a fine bubble generating apparatus for various uses.

  DESCRIPTION OF SYMBOLS 1 ... Fine bubble generation system 2 ... Eddy current pump 3 ... Casing 4 ... Impeller 5 ... Liquid storage tank 6 ... Suction piping 7 ... Suction hole 8 ... Liquid 8a ... Gas 8b ... Gas-liquid mixed fluid 9 ... Discharge hole 10 ... Discharge piping 11 ... Check valve 12 ... Suction hole 12a ... Suction piping 13, 13a-13c ... First connection part 14, 14a-14c ... Fine bubble generator 15 ... Body part 16 ... Socket 17 ... Socket hole 18a, 18b ... Inflow hole DESCRIPTION OF SYMBOLS 19 ... Nozzle 20 ... 2nd connection part 21 ... Header part 22 ... Nozzle hole 23 ... Main-body part 24 ... Header part 25 ... 1st shear chamber 26a, 26b ... Communication hole 27 ... 2nd shear chamber 28 ... Nozzle hole DESCRIPTION OF SYMBOLS 29 ... Nozzle 30 ... Venturi tube 31 ... Fine bubble increase production | generation part 32 ... Base part 33 ... Inhalation part 34 ... Discharge part 35 ... Discharge hole 36 ... Restriction part 3 ... Suction hole 38 ... Suction hole 39 ... 40 ... 41 ... Fine bubble generator 42 ... Case 43 ... Flange 44 ... Flange 45 ... Discharge pipe 46 ... Connection pipe 47 ... Interposition member 48 ... Suction hole 49 ... Bolt hole 50 ... Discharge Hole 51 ... Fine bubble filling chamber A, B1, B2, C, D, E ... Screw groove

In order to achieve the above object, a fine bubble generator according to a first aspect of the present invention includes a first connection portion connected to a discharge pipe for introducing a gas-liquid mixed fluid, and the first connection portion connected to the first connection portion. A flow path extending perpendicularly and planarly to the longitudinal direction of the first connecting portion, and the flow of the gas-liquid mixed fluid is changed vertically without swirling from the first connecting portion . A main body provided with a shear chamber, a second shear chamber connected to the main body via a second connecting portion and bent perpendicularly to the longitudinal direction of the second connecting portion; And a nozzle having a nozzle hole formed at the end of the shear chamber.
In the fine bubble generator having the above-described configuration, the gas-liquid mixed fluid receives a shear force in the first shear chamber to generate fine bubbles, and then the first shear chamber through the second connection portion causes the first bubble to be generated. By being led to the second shear chamber different from the direction of the flow path in the shear chamber, a continuous two-stage shear force is applied due to a sudden change in the continuous two-stage flow path. Therefore, it acts to apply a shearing force to the fine bubbles to promote further miniaturization, and to act to generate new fine bubbles in the gas-liquid mixed fluid.

Claims (6)

  A first connecting portion connected to a discharge pipe for introducing a gas-liquid mixed fluid, and a first connecting portion connected to the first connecting portion and extending vertically to the longitudinal direction of the first connecting portion. A main body provided with one shear chamber, and a second shear chamber connected to the main body via a second connecting portion and bent perpendicularly to the longitudinal direction of the second connecting portion; And a nozzle having a nozzle hole formed at an end of the second shear chamber.   The nozzle is also used as the second connection portion, and the main body portion and the nozzle are connected. The second shear chamber replaces the longitudinal direction of the second connection portion with the main body portion and the nozzle. The nozzle is formed in a cylindrical shape that bends perpendicularly to the longitudinal direction of the communicating hole, and the communicating hole of the nozzle is formed from the main body portion toward the tangential direction of the cylindrical inner peripheral surface of the second shear chamber. The fine bubble generator according to claim 1.   At least a part thereof is inserted into the first connection part, and has a fine bubble increase generation part provided with a venturi pipe that introduces a gas-liquid mixed fluid from the discharge pipe and discharges it into the first shear chamber, The venturi pipe sucks a part of the gas-liquid mixed fluid discharged to the first shear chamber from a suction section provided in the throttle section and discharges it from the discharge section of the venturi pipe. The fine bubble generator according to claim 1 or 2.   The fine bubble generator according to any one of claims 1 to 3 is disposed in a container having a discharge portion, and the first connection portion of the fine bubble generator is used as a suction portion of the container. The fine bubble generating apparatus characterized in that the fine bubbles generated by the fine bubble generator are temporarily stored in the container and discharged from the discharge section.   A pump that mixes the liquid sucked from the suction pipe connected to the liquid storage tank and the gas sucked from the suction pipe and discharges the gas-liquid mixed fluid; a discharge pipe that connects the pump and the liquid storage tank; A fine bubble generation system having a fine bubble generator installed at an end of the discharge pipe on the liquid storage tank side, wherein the fine bubble generator is any one of claims 1 to 3. A fine bubble generating system, which is the fine bubble generator according to the item.   A pump that mixes the liquid sucked from the suction pipe connected to the liquid storage tank and the gas sucked from the suction pipe and discharges the gas-liquid mixed fluid; a discharge pipe that connects the pump and the liquid storage tank; A fine bubble generating system having a fine bubble generating device installed at an end of the discharge pipe on the liquid storage tank side, wherein the fine bubble generating device is the fine bubble generating device according to claim 4. A fine bubble generating system characterized by being.

Images