JP2009273992A - Bubble atomizer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bubble atomizer efficiently producing a large amount of fine bubbles. <P>SOLUTION: The bubble atomizer 1 atomizes bubbles contained in bubbled liquid W1 produced by mixing gas with liquid, and is provided with a bubble separation chamber 2 and a bubble atomizing chamber 20. The bubble separation chamber 2 is provided with a liquid supply port 6 supplying the bubbled liquid W1 and a bubble drawing out port 8 collecting and taking out large bubbles spontaneously floating up from bubbles contained in the bubbled liquid W1 inside the separation chamber 2. The bubble atomizing chamber 20 is provided with a main jetting port 25 jetting bubbled water W2 with large bubbles eliminated as a main whirling stream (a), and a sub-jetting port 26 jetting as a sub-whirling stream (b) crossing the main whirling stream (a), to further atomize the small bubbles in the bubbled water W2 in the bubble atomizing chamber 20. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bubble refining device that can be advantageously used for further refining bubbles contained in a liquid such as water or waste liquid.

  Micronized bubbles called microbubbles with a diameter of 10 to several tens of μm have a negative potential, so they tend to adhere to positive potentials such as dirt, and slowly when in water Surface. Utilizing this property, fine bubble liquid (water) containing fine bubbles has been used in various industrial fields such as wastewater treatment, seafood culture, and cleaning of machine parts. Conventionally, there is one that uses a swirling flow to generate a bubble liquid containing such fine bubbles. For example, the invention described in Patent Document 1 is an example.

JP 2006-116365 A

The invention described in Patent Document 1 is a fine bubble generating device that uses a swirling flow to generate a bubble liquid (water) containing fine bubbles.
This micro-bubble generator has a gas introduction hole on the closed side of a cylindrical container closed at one end, and a pressurized liquid inlet in a tangential direction on a part of the cylindrical inner wall circumferential surface. It is supposed to be.

  This fine bubble generating device forms a negative pressure portion in the vicinity of the central axis of the cylinder by pumping the pressurized liquid into the cylinder from the pressurized liquid introduction port during use and generating a swirling flow therein. By this negative pressure, gas is sucked into the cylinder from the gas introduction hole, and the gas passes on the central axis having the lowest pressure, thereby forming a thin swirl gas vortex. In this cylinder, a swirl flow is formed from the pressurized liquid inlet to the opening side, and along with this swirl, centrifugal force acts on the liquid and centripetal force acts on the gas simultaneously due to the difference in specific gravity between the liquid and gas. Thus, in a state where the liquid part and the gas part are separated, the gas is jetted on the opening side, and at the same time as the jetting, the swirl is suddenly weakened by the surrounding still liquid, and a sudden swirling speed difference occurs. The swirling gas vortex is cut by the swirling speed difference, and as a result, a large amount of fine bubbles are generated and discharged from the opening side.

However, the fine bubble generator described in Patent Document 1 generates fine bubbles by mixing gas in the liquid, and further refines the bubbles contained in the bubble liquid in advance. I can't.
For this reason, the inventor of the present application closes one end on the upstream side and has a main injection port and a sub injection port for injecting bubble liquid into a generating cylinder having a discharge port on the other end on the downstream side. In the inside of the generating cylinder, a main swirl flow is created by the bubble liquid ejected from the main injection port, while a bubble liquid flow ejected from the sub injection port is mixed with the main swirl flow. We have succeeded in developing a bubble micronizer that collides bubbles with each other and refines bubbles contained in the bubble liquid by alternating current, and has succeeded in obtaining bubbles that are effectively and uniformly refined. .

The bubble micronizer described above causes the bubble liquid to collide violently as a main swirl flow and a sub swirl flow inside the generating cylinder, so that the bubble liquid and the bubbles in the bubble liquid, or the bubbles in the bubble liquid collide with each other. Then, the bubbles are pulverized to generate a fine bubble liquid containing fine bubbles (here, the fine bubble liquid refers to bubble particles having a diameter in the range of tens to several tens of micrometers; the same applies hereinafter).
The generation of the bubble liquid containing fine bubbles is achieved in the above-described bubble refiner. The bubble liquid in the previous stage in which the bubbles are refined by the bubble refiner, that is, the conventional technique such as Patent Document 1 is used. The bubble liquid obtained by the bubble generating means includes large bubbles that are not suitable for collision. Even if the large bubbles collide inside the bubble micronizer, some of the large bubbles may remain large and may not be uniformly refined.
Therefore, in order to effectively miniaturize the bubbles, it is required to remove in advance the large inconvenient bubbles that cannot be sufficiently miniaturized even by the collision of the swirling flow.

  The present invention has been made in view of such points, and the object of the present invention is to preliminarily introduce large bubbles that cannot be sufficiently miniaturized even by a collision of swirling flow as a pretreatment for miniaturizing the bubbles in the bubble liquid. An object of the present invention is to provide a bubble refining device that can remove and effectively refining bubbles in a bubble liquid.

  In order to achieve the above object, the present invention provides a bubble refining device for refining bubbles contained in a bubble liquid generated by mixing a gas with a liquid, comprising a bubble separation chamber and a bubble refining treatment chamber. The bubble separation chamber includes a liquid supply port for supplying the bubble liquid and a bubble outlet for collecting and taking out large bubbles that naturally float from the bubbles contained in the bubble liquid. The processing chamber includes a main injection port for injecting the bubble liquid from which the large bubbles have been removed as a main swirl flow, and a sub injection port for injecting as a sub swirl flow to be exchanged with the main swirl flow. An object of the present invention is to provide a bubble refining device characterized in that the small bubbles in the bubble liquid are further refined in a processing chamber.

According to this invention, the bubble liquid supplied to the bubble separation chamber through the liquid supply port moves through the bubble separation chamber. At this time, the large bubbles having high buoyancy rise while moving, are collected at the bubble outlet, and are discharged to the outside through the bubble outlet.
In this way, only small bubbles with small buoyancy remain in the bubble liquid from which the large bubbles have been removed.
The bubble liquid from which the large bubbles have been removed is pumped to the bubble miniaturization processing chamber and supplied into the bubble miniaturization processing chamber through the main injection port and the sub-injection port, and the bubbles in the bubble liquid are refined. It will be. When the bubbles in the bubble liquid are refined, first, in the bubble refinement processing chamber, the bubble liquid ejected from the main injection port swirls using the inner peripheral wall surface inside the bubble refinement treatment chamber, thereby causing the main swirl flow. At the same time, a bubble liquid is separately injected from the sub-injection port into the bubble miniaturization processing chamber. At this time, the bubble liquid from the outlet follows the flow of the main swirl flow in the bubble refinement processing chamber, collides with the main swirl flow while creating a sub swirl flow, and inhibits the flow in the bubble liquid and the bubble liquid Bubbles or bubbles in the bubble liquid collide with each other, and the bubbles are pulverized and refined.

  The present invention also provides a bubble miniaturization apparatus in which the bubble miniaturization processing chamber is provided inside the bubble separation chamber.

  According to this invention, since the bubble miniaturization processing chamber is provided inside the bubble separation chamber, the entire bubble miniaturization apparatus can be miniaturized.

  The present invention also provides a bubble miniaturization apparatus characterized in that the bubble separation chamber is partitioned by a partition plate and the bubble miniaturization treatment chamber is disposed in a second chamber communicated with each other. is there.

  According to this invention, it is possible to prevent the bubble liquid before the large bubbles are removed from flowing into the second chamber by partitioning the bubble separation chamber with the partition plate.

  The present invention also provides a bubble miniaturization apparatus characterized in that the bubble separation chamber is divided into upper and lower portions by a partition plate and the second chamber is located below.

  According to this invention, by setting the second chamber below the bubble separation chamber, it is possible to more reliably prevent the bubble liquid before the large bubbles are removed from flowing into the second chamber.

  The present invention also provides a bubble refining device characterized in that a plurality of bubble refining treatment chambers are provided.

  According to this invention, by providing a plurality of bubble miniaturization processing chambers, bubbles in a large amount of bubble liquid can be refined at a time.

  The present invention also provides a bubble refining device characterized in that a flow region is provided between the bubble separation chamber and the bubble refining treatment chamber to induce a natural rise of large bubbles from the bubble liquid. is there.

  According to the present invention, by providing a flow region between the bubble separation chamber and the bubble miniaturization processing chamber, the natural bubble rises from the bubble liquid passing through the flow region, and the large bubbles are removed. Can be promoted.

  Further, according to the present invention, the bubble miniaturization processing chamber is formed in a cylindrical body that closes one end on the upstream side and has a discharge port on the other end on the downstream side. The main injection port for generating the gas and the sub injection port for generating the sub swirl flow are opened in the order from the upstream side to the downstream side, and the bubble liquid sent to the inside is exchanged and refined. The present invention provides a bubble refining apparatus.

  According to this invention, after forming a stable main swirl flow by forming the bubble miniaturization processing chamber in the cylinder and opening the main injection port and the sub injection port in the order from the upstream side to the downstream side. Therefore, the secondary swirl flow can be exchanged efficiently.

  Therefore, from the above description, according to the bubble miniaturization apparatus of the present invention, the bubble separation port is provided with a bubble vent, so that it cannot be evenly and sufficiently miniaturized by a swirling flow collision. Air bubbles can be removed in advance. After that, since the bubbles in the bubble liquid in the small bubbles are refined in the bubble refinement processing chamber, the bubbles in the bubble liquid are crushed efficiently and a large amount of uniform and fine bubbles are produced. The fine bubble liquid contained in can be easily generated.

  In addition, a bubble refinement processing chamber is provided to refine the bubbles, and the bubble liquid and the bubbles in the bubble liquid are exchanged under pressure between the main and follower swirl flows inside the bubble refinement treatment chamber. Or since the bubbles in the bubble liquid collide with each other, the bubbles can be effectively crushed and miniaturized.

Hereinafter, embodiments of the bubble miniaturizer according to the present invention will be described in detail.
FIG. 1 is a plan view of a bubble miniaturization apparatus 1 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG.

  The bubble refining device 1 according to the present embodiment is for refining bubbles contained in a bubble liquid W1 including large bubbles generated and pumped by a bubble liquid generator (not shown). The fine bubble liquid W3 containing bubbles refined by the gasification apparatus 1 is sent out to a liquid to be processed or the like (not shown).

The bubble refining device 1 includes a bubble separation chamber 2 and a partition plate 3.
The bubble separation chamber 2 is formed in a box shape, and the inside is partitioned into a first chamber 4 and a second chamber 5 by a partition plate 3.
In the upper part of the bubble separation chamber 2, a liquid supply port 6 for supplying the bubble liquid W <b> 1 to the inside, a hydraulic pressure gauge connection port 7 for connecting a hydraulic pressure gauge, and natural bubbles from the bubbles contained in the bubble liquid W <b> 1. A bubble vent 8 is provided for discharging the rising large bubbles to the outside.
(Here, a large bubble means one having a bubble diameter of 1 mm or more that is easily bonded to each other. The same applies hereinafter.)
The liquid supply port 6 and the bubble removal port 8 are opened at an interval at which the large bubbles naturally separate and rise while the large bubbles in the bubble liquid W1 flow and move inside the bubble separation chamber 2. The
The bubble liquid W1 pressure-fed and supplied to the first chamber 4 through the liquid supply port 6 moves inside the first chamber 4 toward the bubble removal port 6 side. At this time, the large bubbles having a large buoyancy rise due to the buoyancy during movement, are collected at the bubble vent 8, and are discharged to the outside through the bubble vent 8.

  In addition, a communication hole 3 a is formed in the partition plate 3, and the first chamber 4 and the second chamber 5 are communicated with each other. Since the communication hole 3a is formed on the downstream side of the bubble outlet 8 of the first chamber 4, even if a stirring flow is generated by the flow of the bubble liquid W1 near the liquid supply port 6, large bubbles are not generated. It is possible to prevent the liquid from being entrained again and flowing directly into the second chamber 5 as the bubble liquid W1.

The second chamber 5 includes a first rectifying chamber 9 for stabilizing the flow of the bubble liquid W2 generated by removing large bubbles from the bubble liquid W1, and a second rectification chamber 9 provided in the first rectifying chamber 9. There are provided a rectifying chamber 10 and a bubble miniaturization processing chamber 20 provided inside the second rectifying chamber 10 for refining bubbles in the stabilized bubble liquid W2.
In addition, a cylindrical mounting portion 12 having a female screw 12a formed therein for projecting a connecting tool 13 to be described later protrudes toward the inside of the second chamber 5 at one end side of the second chamber 5, The chamber 5 communicates with the outside. And the box-shaped 1st rectification | straightening chamber 9 is attached so that the outer side of this attaching part 12 may be enclosed.

The first rectifying chamber 9 is provided in order to stabilize the flow of the bubble liquid W <b> 2 flowing from the first chamber 4 through the communication hole 3 a of the partition plate 3, and is a box surrounding the second rectifying chamber 10. A communication hole 9a is formed in the mold and allows the bubble liquid W2 to flow inside.
Thus, by providing the first rectifying chamber 9 inside the second chamber 5, the flow region 5a through which the bubble liquid W1 flows is formed outside the first rectifying chamber 9, which is the inside of the second rectifying chamber 10. Will be formed. Also here, since the large bubbles in the bubble liquid W1 are naturally floated while the bubble liquid W1 passes through the flow region 5a, the large bubbles remaining in the bubble liquid W1 without being removed in the first chamber 4 are introduced. Are removed, and the removed large bubbles are collected in the bubble vent 8 through the communication hole 3a and discharged to the outside. Further, since the communication hole 9 a is formed in the lower portion of the first rectifying chamber 9, the large bubbles that rise are prevented from flowing into the first rectifying chamber 9.

  The connector 13 is for connecting the second rectifying chamber 10 and the bubble miniaturization processing chamber 20 to the second chamber 5 and for communicating the bubble miniaturization processing chamber 20 to the outside of the second chamber 5. A male screw 13a is formed on the outer periphery of the second chamber 5 and is engaged with the female screw 12a of the mounting portion 12 of the second chamber 5. Further, at one end located inside the second chamber 5, a step is provided to form a thin outer diameter, and a female screw 15a for screwing a male screw 23a formed at the end of the bubble miniaturization processing chamber 20 is provided. A mounting portion 15 formed on the inner periphery is formed.

  The second rectifying chamber 10 is formed in a cylindrical shape, and one end thereof is fitted to the outer periphery of the attachment portion 15 of the connector 13. Further, a communication hole 10a for allowing the bubble liquid W2 to flow inside is formed at the other end.

  After the large bubbles are removed from the bubble liquid W1 in the bubble separation chamber 2 as described above, the bubble liquid W2 is generated. After the bubble liquid W2 is stabilized through the first and second rectifying chambers 9 and 10, In addition, the bubbles in the bubble liquid W2 are refined in the bubble refinement chamber 20.

  3 is an enlarged perspective view of the bubble miniaturization processing chamber 20, FIG. 4 (a) is a cross-sectional view taken along the line BB in FIG. 3, and FIG. 4 (b) is a cross-sectional view taken along the line CC in FIG. 5 is a cross-sectional view taken along the line DD of FIG.

As shown in FIGS. 3 to 5, the bubble miniaturization chamber 20 closes one end on the upstream side (left side in the figure) with a lid 21 and discharges the other end on the downstream side (right side in the figure) at the other end. It is formed from a cylindrical cylinder 23 provided with 22. The cylindrical body 23 is provided with a main injection port 25 and a secondary injection port 26 for injecting the bubble liquid W <b> 2 to be pumped from the outside to the inside of the cylindrical body 23.
In addition, a shaft body 27 attached to the lid body 21 is arranged inside the cylinder body 23 so as to align the length direction along the axial center portion P.
Further, a male screw 23 a for screwing with the connector 13 is formed on the outer peripheral surface of the end portion of the cylindrical body 23 on the discharge port 22 side.

  The main injection port 25 is opened in the peripheral wall portion 24 of the cylindrical body 23 and is located on the upstream side of the sub injection port 26. As shown in FIG. 4A, the opening direction of the main injection port 25 is perpendicular to the direction of the axis P of the cylindrical body 23 and tangential to the inner wall peripheral surface 28 of the cylindrical body 23. The bubble liquid W <b> 2 is jetted toward the inner wall peripheral surface 28 of the cylindrical body 23 so that a swirl flow can be formed inside the cylindrical body 23.

  On the other hand, the secondary injection port 26 is opened in the wall portion 24 of the cylindrical body 23 so as to be located on the downstream side of the main injection port 25. And the opening direction of this sub injection port 26 is formed toward the direction orthogonal to the axial center part P direction of the cylindrical body 23, as shown in FIG. It is opened at a position where the bubble liquid W2 is ejected by being displaced so as to approach the axial center P of the cylindrical body 24 with respect to the ejection direction.

As shown in FIG. 5, the shaft body 27 is formed continuously with a cylindrical rod-shaped thin-diameter portion 29 having a constant outer diameter over a predetermined range along the axial center portion P, and the tip of the small-diameter portion 29. An enlarged diameter portion 30 larger than the diameter of the small diameter portion 29, a substantially conical small diameter portion 31 formed continuously with the expanded diameter portion 30 and gradually becoming narrower toward the discharge port on the downstream side; It is composed of an approximate bullet shape consisting of
The main injection port 25 opens substantially toward the periphery of the small-diameter portion 29 (in the present embodiment, the upper portion of the small-diameter portion 29), and the sub-injection port 26 is the most upstream side of the reduced-diameter portion 31. It opens toward the periphery (in this embodiment, the upper part of the reduced diameter portion 31).

The bubble miniaturization processing chamber 20 configured in this manner causes the bubble liquid W2 pumped from the outside of the cylindrical body 23 to be ejected to the inside of the cylindrical body 23 through the main injection port 25 on the one hand. After reaching the surface 28, the main swirl flow a is formed by swirling along the inner wall peripheral surface 28. At this time, the bubble liquid W2 swirls around the small-diameter portion 29 to form a swirl flow smoothly and stably without stagnation.
The main swirl flow a swirls around the small diameter portion 29 and then collides with the side surface 32 on the upstream side of the expanded diameter portion 30. After the flow is stopped here, the expanded wall portion 30 causes the inner wall surface of the cylindrical body 23 to move. Around the narrowed gap with increasing the flow velocity, and flows from the upstream side toward the downstream discharge port 22.

On the other hand, the bubble liquid W2 pressure-fed from the outside of the cylindrical body 23 is ejected into the cylindrical body 23 through the secondary ejection port 26 and swirls around the expanded diameter portion 29 to become a swirling flow b.
At this time, since the main swirling flow a flows in the inside of the cylindrical body 23, when the bubble liquid W <b> 2 is ejected into the cylindrical body 23, the main swirl a is at the AC point 32 near the secondary injection port 26. The swirling flow a and the sub swirling flow b intersect. In this way, when the main swirl flow a and the sub swirl flow b exchange, the sub swirl flow b collides so as to prevent the flow of the main swirl flow a, and the bubble liquid W2 and the bubble liquid W2 are in collision. Bubbles or bubbles in bubble liquid W2 collide violently, and bubbles in bubble liquid W2 are crushed. Further, along with this pulverization, the pressure applied to the bubble liquid W2 is increased around the narrowed diameter portion 30 and then rapidly decreases around the reduced diameter portion 31. Bubbles are crushed. As the bubbles are pulverized in this way, the fine bubble liquid W3 is generated and discharged from the discharge port 22 as a cleaning liquid containing fine bubbles.

  As described above, according to the bubble refining device 1 according to the present embodiment, by removing large bubbles from the bubble liquid W1 in the bubble separation chamber 2, the bubble liquid W2 having a uniform bubble diameter that does not include large bubbles. After the bubble is generated, the bubble liquid W2 is refined in the bubble refinement processing chamber 20, so that the bubbles can be reliably refined in the bubble refinement treatment chamber 20. From this, the fine bubble liquid W3 containing a large amount of fine bubbles can be easily generated and sent out as a liquid to be treated such as a cleaning liquid.

In the above-described embodiment, the example in which the inside of the bubble separation chamber 2 is partitioned by the partition plate 3 has been described. However, the present invention is not limited to this, and the bubble miniaturization processing chamber 20 is disposed directly inside the bubble separation chamber 2. Alternatively, a plurality of bubble miniaturization processing chambers 20 may be provided.
Moreover, in the above-mentioned embodiment, although the example which arrange | positions the 1st chamber 4 and the 2nd chamber 5 up and down was shown, you may arrange | position the 1st chamber 4 and the 2nd chamber 5 in parallel, for example. .
Furthermore, in the above-described embodiment, an example in which one main injection port 25 and one sub injection port 26 are formed is shown. However, the number of the main injection ports 25 and the sub injection ports 26 is one or more, and One of the main injection ports 25 may be formed on the most upstream side, and a plurality of main injection ports 25 may be arranged so as to be dispersed in the circumferential direction of the cylindrical body 23.

It is a top view of the bubble refinement | miniaturization apparatus by embodiment of this invention. It is AA sectional drawing of FIG. It is an expansion perspective view of a bubble miniaturization processing chamber. (A) is BB sectional drawing of FIG. 3, (b) is CC sectional drawing of FIG. It is DD sectional drawing of Fig.4 (a).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bubble refiner 2 Bubble separation chamber 3 Partition plate 3a Communication hole 4 1st chamber 5 2nd chamber 5a Flow area 6 Liquid supply port 7 Water pressure gauge connection port 8 Bubble vent 9 First rectification chamber 9a Communication hole 10 2nd Rectification chamber 10a Communication hole 12 Mounting portion 12a Female screw 13 Connecting tool 13a Male screw 15 Mounting portion 15a Female screw 20 Bubble refinement processing chamber 21 Lid 22 Discharge port 23 Cylindrical body 23a Male screw 24 Peripheral wall portion 25 Main injection port 26 Sub-injection port 27 Shaft Body 28 Inner wall peripheral surface 29 Small diameter portion 30 Expanded diameter portion 31 Reduced diameter portion 32 AC point P Axial portion W1 Bubble liquid W2 Bubble liquid W3 Fine bubble liquid a Main swirl flow b Sub swirl flow

Claims (7)

  A bubble refining apparatus for refining bubbles contained in a bubble liquid generated by mixing a gas with a liquid, comprising a bubble separation chamber and a bubble refining treatment chamber, wherein the bubble separation chamber contains the bubble liquid. A liquid supply port for supplying and a bubble outlet for collecting and taking out the large bubbles that naturally float from the bubbles contained in the bubble liquid inside, while the bubble miniaturization processing chamber has the large bubbles removed A main injection port for injecting a bubbling liquid as a main swirling flow and a sub-injection port for injecting a bubbling liquid as a sub swirling flow that exchanges with the main swirling flow. A bubble miniaturization apparatus characterized by further miniaturization.   The bubble miniaturization apparatus according to claim 1, wherein the bubble miniaturization processing chamber is provided inside the bubble separation chamber.   The bubble refinement apparatus according to claim 1 or 2, wherein the bubble separation chamber is partitioned by a partition plate, and the bubble refinement chamber is disposed in a second chamber communicated with each other.   The bubble miniaturization apparatus according to claim 3, wherein the bubble separation chamber is divided into an upper part and a lower part by a partition plate, and the second chamber is located below.   The bubble refiner according to any one of claims 1 to 4, wherein a plurality of bubble refinement chambers are provided.   6. A bubble refining apparatus according to claim 3, wherein a flow region is provided between the bubble separation chamber and the bubble refining treatment chamber for inducing natural floating of large bubbles from the bubble liquid. .   The bubble miniaturization processing chamber is formed in a cylindrical body that closes one end on the upstream side and has a discharge port on the other end on the downstream side, and generates a main swirling flow in the body of the cylindrical body. The injection port and a sub-injection port for generating a sub-swirl flow are opened in the order from the upstream side to the downstream side, and the bubble liquid sent to the inside is exchanged and refined. 6. The bubble refining device according to any one of 6 above.

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