KR20170093297A

KR20170093297A - Nano bubble generator using a perforated plate

Info

Publication number: KR20170093297A
Application number: KR1020160014295A
Authority: KR
Inventors: 김종민; 오승훈; 이정일; 채종이; 황민섭
Original assignee: 중앙대학교 산학협력단
Priority date: 2016-02-04
Filing date: 2016-02-04
Publication date: 2017-08-16
Also published as: KR101795907B1

Abstract

An apparatus for generating fine bubbles is disclosed. Wherein the fine bubble generating device has an internal space and includes a chamber for containing an injection opening for injecting a liquid or liquid mixture into the internal space and an outlet opening for discharging the liquid or liquid mixture injected through the injection opening, ; At least two perforated plates formed in the inner space of the chamber and forming a plurality of perforations; And an injection unit connected to the injection opening in fluid communication so as to inject a liquid or liquid mixture into the chamber, wherein each of the perforation plates is arranged to face each other, and the perforations of the respective perforated plates are arranged to be offset from each other do.

Description

TECHNICAL FIELD [0001] The present invention relates to a fine bubble generator using a perforated plate,

More particularly, to a fine bubble generating device for generating fine bubbles by using two or more perforated plates disposed on a moving path through which liquid and gas move.

Bubbles are the pockets of gas in the liquid, that is, bubbles. Micro bubbles are much smaller than regular bubbles and mean very small bubbles that need to be numbered in nanometers. Micro bubbles have different characteristics from ordinary bubbles in the following three aspects.

First, ordinary bubbles with a size or diameter of several millimeters or more in the liquid float up at the same time as they are produced and burst at the surface of the liquid. The reason that the bubble floats up is because the buoyancy of the bubble is larger than the resistance of the liquid. On the other hand, the fine bubbles stay in the liquid for a long time. This is because the buoyancy of the fine bubbles is so small that it can not overcome the resistance of the liquid.

Second, when the fine bubbles stay in the liquid for a long time, the gas inside the fine bubbles gradually dissolves into the liquid through the surface of the fine bubbles and gradually becomes smaller in size. Furthermore, when the solubility of the gas in the fine bubbles to the liquid is high, the bubbles themselves are completely dissolved and disappear.

Third, the smaller the bubble size is, the larger the ratio of the surface area to the volume becomes. Thus, the efficiency of the application field utilizing the surface characteristics of the fine bubble is enhanced as in the water purification field which can utilize the micro bubble collecting effect.

These three features of fine bubbles enable a wide variety of applications of nanobubbles.

In the case of the water treatment, it is possible to shorten the treatment time for increasing the water quality by effectively injecting air into the water. In the case of sewage treatment, it is possible to efficiently inject oxidative gas such as ozone into the sewage, In the case of the washing treatment, the washing liquid and the rinse water are made into the oxygen active water containing the high concentration of dissolved oxygen, so that the washing liquid has a powerful cleaning function and the sterilizing function, Thereby reducing the time. In addition, it can be used in various fields requiring sterilization, cleaning, purification, and the like.

As a conventional micro bubble generating device, there are a micro bubble generating device disclosed in Japanese Patent Application Laid-Open No. 10-2015-0040134 and a micro bubble generating device disclosed in Japanese Patent Application No. 10-1036227. These patents have a complicated structure for generating fine bubbles, which makes it difficult to manufacture the apparatus and raises the manufacturing cost.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fine bubble generating device that is easy to manufacture and can be easily manufactured, thereby reducing manufacturing costs.

The apparatus for generating fine bubbles according to an embodiment of the present invention includes an injection opening for injecting a liquid or a liquid mixture into the internal space and a liquid or liquid mixture injected through the injection opening A chamber including an outlet opening; At least two perforated plates formed in the inner space of the chamber and forming a plurality of perforations; And an injection unit connected to the injection opening in fluid communication so as to inject a liquid or liquid mixture into the chamber, wherein each of the perforation plates is arranged to face each other, and the perforations of the respective perforated plates are arranged to be offset from each other .

According to another embodiment of the invention, at least one of the two or more perforated plates may be configured to rotate. To this end, the apparatus may further include a rotating device connected to at least one of the at least two punch plates and a rotating device rotating the punch plate connected to the rotating shaft.

According to another embodiment of the present invention, the rotary shaft may be eccentrically connected to at least one of the two or more perforated plates. In this case, the chamber may include a protruding portion whose diameter is increased to eccentrically rotate in the chamber, the perforated plate connected to the eccentric rotational axis, and the perforated plate connected to the eccentric rotational axis may be disposed in the region where the protruding portion is formed have.

The apparatus for producing fine bubbles according to the present invention is easy to manufacture, and can be easily manufactured, thereby reducing the manufacturing cost.

FIGS. 1A and 1B are cross-sectional views illustrating an apparatus for generating fine bubbles according to an exemplary embodiment of the present invention, and illustrate embodiments of an injection unit.
2 is a perspective view of FIG.
3 and 4 are a cross-sectional view and a perspective view for explaining a micro bubble generator according to another embodiment of the present invention.
5 and 6 are a cross-sectional view and a perspective view for explaining a micro bubble generating device according to another embodiment of the present invention.
Figure 7 is a side view of Figure 5;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a fine bubble generator according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It should be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. In the accompanying drawings, the dimensions of the structures are enlarged to illustrate the present invention in order to clarify the present invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "comprises", "having", and the like are used to specify that a feature, a number, a step, an operation, an element, a part or a combination thereof is described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

FIGS. 1A and 1B are cross-sectional views illustrating an apparatus for generating fine bubbles according to an exemplary embodiment of the present invention, and illustrate embodiments of an injection unit. Fig. 2 is a perspective view of Fig. 1a. Fig.

Referring to FIGS. 1A and 2, an apparatus 1000 for generating fine bubbles according to an exemplary embodiment of the present invention includes a chamber 100, a perforated plate 200, and an injection unit 300.

The chamber 100 provides a passage through which the liquid or mixture of liquids passes. The chamber 100 includes an inlet opening 110 for injecting a liquid or a liquid mixture and an outlet opening 120 for discharging a liquid or liquid mixture injected through the opening 110 for injection. For example, the chamber 100 may have a cylindrical shape and may be made of metal or synthetic resin.

The perforation plate 200 allows the liquid or liquid mixture to be injected into the chamber 100 to be produced as a fine bubble. For this purpose, the perforated plate 200 is installed in the inner space of the chamber 100 to form a plurality of perforations 210. At this time, the respective perforated plates 200 are arranged to face each other, and the perforations 210 of the perforated plates 200 are arranged to be offset from each other. The perforated plate 200 has a shape corresponding to the cross-sectional shape of the chamber 100. For example, it may be in a disc shape. The perforated plate 200 may also be made of an environmentally friendly material to prevent contamination of the liquid or liquid mixture. For example, the perforated plate 200 may be made of stainless steel or may have a surface coated with chromium (Cr).

Here, the liquid-liquid mixture refers to a liquid and a gas-mixed fluid, and liquid and gas can be injected simultaneously or at a certain time interval between liquid and gas to form a liquid-liquid mixture to be injected into the chamber 100 . At this time, the water-insoluble gas exists in the form of a bubble.

The injection unit 300 supplies the liquid or liquid mixture to the internal space of the chamber 100.

1A, the injection unit 300 includes a liquid injection pipe 310 connected to the injection opening 110 of the chamber 100 for injecting liquid, and a liquid injection pipe 310 branched from the liquid injection pipe 310 And a gas injection pipe 320 for injecting gas onto a path inside the liquid injection pipe 310. The liquid injection tube 310 may be connected to a reservoir for storing the liquid, and the liquid in the reservoir may be pumped by the pump and supplied to the inner space of the chamber 100 through the liquid injection tube 310. The injection part 300 of this structure injects the liquid mixture into the chamber 100.

1B, the injection unit 300 includes a liquid injection pipe 310 connected to the injection opening 110 of the chamber 100 to inject liquid, and the gas injection pipe 310 shown in FIG. (320) may be omitted. The injection part 300 of this structure is injected into the chamber 100 with liquid. In the case where only the liquid is injected, since the injected liquid passes through the perforations 210 formed in the perforated plate 200, microbubbles may be generated due to cavitation, so that only liquid may be injected through the injector 100 .

Hereinafter, a process of generating a fine bubble by the fine bubble generator 1000 according to an embodiment of the present invention will be described.

First, a liquid or liquid mixture is injected into the inner space of the chamber 100 through the injection part 300. At this time, in the case of the liquid-liquid mixture supplied into the chamber 100, the liquid and the gas are mixed with each other, and the gas is dissolved in the liquid. As described above, the gas which is not dissolved in the liquid exists in the form of bubbles.

The liquid or liquid mixture supplied to the inside of the chamber 100 can move along the longitudinal direction of the chamber 100 by the pumping pressure of the pump illustrated above.

The liquid or liquid mixture supplied to the inside of the chamber 100 moves toward the two or more perforated plates 200 disposed in the chamber 100. In this process, The micro bubbles may be formed while passing through the perforations 210 after the bubbles generated when the liquid mixture is injected hit the perforations 210 in the case of the liquid mixture.

That is, the liquid or liquid mixture injected through the injection unit 300 may form bubbles while passing through the perforations 210 formed in the perforated plate 200 positioned first in the chamber 100, The bubble existing at the time of passing through the perforation 210 can be collided with the edge of the perforation 210 and the inner surface of the perforation 210 to be broken into a bubble having a size smaller than the size of the initial bubble.

The liquid or liquid mixture that has passed through the perforations 210 of the first perforation plate 200 then travels through the perforations 210 of the second positioned perforated plate 200 such that the liquid or liquid mixture and the bubbles contained therein, It may collide with the edge of the perforation 210 and the inner surface of the perforation 210 while passing through the perforation 210 of the plate 200 to be broken into smaller sized bubbles. The liquid or liquid mixture and the bubbles included in the first perforation plate 200 may be separated from the perforations 210 of the first perforation plate 200 and the perforations 210 of the second perforation plate 200 The second perforation plate 200 is prevented from moving linearly while passing through the perforations 210 of the first perforated plate 200 and is contacted with the surface of the second perforated plate 200 so that the perforation 210 of the second perforated plate 200, As shown in FIG.

This process is repeated until it passes through the puncture 210 of the puncture plate 200 positioned last in the chamber 100 and the punctures 210 of the entire puncture plate 200 located in the chamber 100 are repeated a few times A large amount of micro-sized fine bubbles can be generated while passing.

The apparatus 1000 for generating fine bubbles according to an embodiment of the present invention includes a plurality of perforated plates 200 having perforations 210 for forming fine bubbles in a tubular chamber 100, A means for forming a fine bubble by colliding a liquid or liquid mixture in the chamber 100 through which the liquid or liquid mixture is passed, for example, a process for forming a plurality of recesses and protrusions in the interior of the chamber 100 Is unnecessary.

Therefore, the apparatus for producing micro bubbles according to the present invention is advantageous in that it can be easily manufactured, can be easily manufactured, and can be manufactured at a reduced cost.

3 and 4 are a cross-sectional view and a perspective view for explaining a micro bubble generator according to another embodiment of the present invention.

Referring to FIGS. 3 and 4, a micro bubble generator 2000 according to another embodiment of the present invention is configured to rotate at least one of two or more perforated plates 200 disposed in a chamber 100. The fine bubble generating apparatus 1000 according to an embodiment of the present invention may further include a rotating shaft 400 and a rotating device 500 and may further include a rotating shaft 400 and a rotating device 500. [ ). Therefore, the following description will focus on the rotating shaft 400 and the rotating device 500.

The rotating shaft 400 is connected to at least one of the at least two perforated plates 200. For example, the rotary shaft 400 may be formed by arranging two or more perforated plates 200 on the at least one perforated plate 200 of the two or more perforated plates 200 sequentially disposed from the injection opening 110 of the chamber 100, (Not shown). At this time, the rotary shaft 400 may be connected to the center of the perforated plate 200. When the rotary shaft 400 is connected, the chamber 100 may have a cylindrical shape with one side blocked and the other side opened. In this case, the rotation axis 400 can be connected to the perforated plate 200 in the chamber 100 through the clogged surface of the chamber 100, and the liquid injection pipe 310, which will be described later, 400 may be connected to the penetrating surface. The rotating shaft 400 may be made of an eco-friendly material to prevent contamination of the liquid or liquid mixture. For example, the rotary shaft 400 may be made of stainless steel, or the surface of the steel bar may be coated with chromium.

The rotating device 500 rotates the rotating shaft 400. In one example, the rotating device 500 may be configured to be rotated by the driving motor 510 and the belt 540. In this case, the first belt pulley 520 may be coupled to the rotation shaft 400, the second belt pulley 530 may be coupled to the drive shaft 511 of the drive motor 510, 520 and the second belt pulley 530 may be coupled with a belt 540. [ The second belt pulley 530 rotates together and the first belt pulley 520 connected by the belt 540 is rotated to rotate the rotation shaft 400 Can rotate.

Hereinafter, a process of generating the fine bubbles by the fine bubble generator 2000 according to another embodiment of the present invention will be described.

First, the rotating device 500 is driven to rotate the rotating shaft 400. The perforation plate 200 connected to the rotary shaft 400 among the at least two perforated plates 200 in the chamber 100 rotates in the chamber 100.

The liquid or liquid mixture is injected into the inner space of the chamber 100 through the injection part 300. At this time, in the case of the liquid-liquid mixture supplied into the chamber 100, the liquid and the gas are mixed with each other, and the gas is dissolved in the liquid. As described above, the gas which is not dissolved in the liquid exists in the form of bubbles.

The liquid or liquid mixture supplied to the inside of the chamber 100 moves toward the two or more perforated plates 200 disposed in the chamber 100. In this process, The micro bubbles may be formed while passing through the perforations 210 formed in the perforations 210 or bubbles generated when the liquid mixture is injected into the perforations 210.

This process is the same as the process of generating the fine bubbles in the fine bubble generator 1000 according to the embodiment of the present invention described above and is further performed by using the rotating shaft 400 and the rotating device 500, 200 can be more effectively generated through the process of rotating the micro bubbles.

That is, the liquid or liquid mixture passes through the perforations 210 of the perforated plate 200, which do not rotate in the chamber 100, and generates a fine bubble, and the liquid or liquid mixture containing the fine bubble is rotated by the rotation axis 400 The liquid or liquid mixture impinges on the rotating perforated plate 200 where the perforated plate 200 is rotated and is interrupted by the normal flow of the liquid or liquid mixture, A liquid or liquid mixture is vortexed between the non-rotating perforated plate 200 and the rotating perforated plate 200.

The liquid or liquid mixture forming the vortex is passed through the perforation 210 of the rotating perforated plate 200 while being rotated by the vortex wherein the flow rate of the liquid or liquid mixture is increased by vortex and the rotating perforation plate 200 The fine bubbles in the liquid or liquid mixture can be broken into smaller sizes by colliding with the edges of the perforations 210 and the inner surface of the perforations 210 at an increased flow rate as they pass through the perforations 210 of the perforations 210. Therefore, the amount of generation of fine bubbles is increased.

This process is carried out whenever the liquid or liquid mixture passes through the non-rotating perforated plate 200 and arrives at the front of the rotating perforated plate 200.

The micro bubble generator 2000 according to another embodiment of the present invention is configured to rotate a part of two or more perforated plates 200 disposed in the chamber 100, The fine bubbles are caused to collide with the perforations 210 by increasing the speed, so that a larger amount of fine bubbles can be generated. Therefore, fine bubbles can be generated more effectively.

5 and 6 are a cross-sectional view and a perspective view for explaining a micro bubble generator according to still another embodiment of the present invention, and FIG. 7 is a side view of FIG. 5. FIG.

5 and 6, a fine bubble generator 3000 according to another embodiment of the present invention includes a rotating shaft (not shown) for rotating at least one of two or more perforated plates 200 disposed in a chamber 100, 400 and a rotating device 500. The rotating shaft 400 is eccentrically connected to the perforated plate 200 to which the rotating shaft 400 is connected. The chamber 100 also includes a protrusion 130 whose diameter is increased to eccentrically rotate within the chamber 100, such that the perforated plate 200 connected to the eccentric rotation axis 400 is rotated. 3 and 4, except that the rotary shaft 400 is eccentrically connected to the perforated plate 200 and the chamber 100 includes the protrusions 130. In this case, Bubble generating apparatus 2000 according to another embodiment of the present invention described with reference to FIG. 4, the following description will focus on the eccentric rotation shaft 400 and the protrusion 130. FIG.

The rotary shaft 400 is connected to at least one perforated plate 200 in the chamber 100 to be rotated and the rotary shaft 400 is eccentrically connected to the perforated plate 200, And eccentrically rotates about a rotation axis 400 connected to eccentrically connected one side of the center of the rotor 200 as shown in FIG.

The protrusion 130 is formed on a part of the chamber 100 and rotates together with the rotation axis 400 eccentrically connected to the perforated plate 200 to correspond to the rotation radius of the perforated plate 200, The diameter is increased and protruded. A perforated plate 200 connected to the eccentric rotary shaft 400 is disposed in the protrusion 130.

Hereinafter, a process of generating the fine bubbles by the fine bubble generator 3000 according to another embodiment of the present invention will be described.

In this process, in addition, a liquid or liquid mixture passes through the perforations 210 of the perforated plate 200, which do not rotate in the chamber 100, to produce fine bubbles, and a liquid or liquid mixture containing fine bubbles, , The lumen mixture impinges on the rotating perforated plate 200 and the perforated plate 200 is rotated so that it is interrupted by the normal flow of the liquid or liquid mixture, Whereby a liquid or a liquid mixture is vortexed between the non-rotating perforated plate 200 and the rotating perforated plate 200.

Since the rotary shaft 400 is eccentrically connected to the perforated plate 200 connected to the rotary shaft 400, the perforated plate 200 connected to the rotary shaft 400 is moved in the region where the protrusions 130 of the chamber 100 are formed As the perforated plate 200 eccentrically rotates, the end of the perforated plate 200 strikes the liquid-liquid mixture, whereby the liquid or liquid-liquid mixture forms a larger swirling vortex, and the liquid or liquid- The flow rate can also increase.

The liquid or liquid mixture forming the vortex is passed through the perforations 210 of the rotating perforated plate 200 at an increased flow rate by the vortex. At this time, as the perforation 210 formed on the rotating perforated plate 200 is eccentrically rotated, the position of the perforation 210 is continuously changed. As the perforation 210 is moved, the perforation 210 The micro bubble collides with the perforation 210 so that the micro bubble can be broken into smaller sizes. Therefore, the amount of fine bubbles generated is further increased.

This process is carried out whenever the liquid or liquid mixture reaches the front of the perforated plate 200 rotating eccentrically through the perforated plate 200 which does not rotate.

The micro bubble generator 3000 according to another embodiment of the present invention is configured to eccentrically rotate a part of two or more perforated plates 200 disposed in the chamber 100, And the moving speed is further increased to cause the fine bubbles to collide with the perforations 210, so that the amount of fine bubbles to be formed can be increased.

The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features presented herein.

Claims

A chamber having an internal space and including an injection opening for injecting the liquid or liquid mixture into the internal space and an outlet opening for discharging the liquid or liquid mixture injected through the injection opening;
At least two perforated plates formed in the inner space of the chamber to form a plurality of perforations; And
And an injector fluidly connected to the injection opening and injecting a liquid or liquid mixture into the chamber,
Wherein each of the perforated plates is disposed so as to face each other, and the perforations of the respective perforated plates are arranged to be offset from each other.
A fine bubble generator using a perforated plate.

The micro bubble generator according to claim 1,
Characterized in that at least one of the two or more perforated plates is configured to rotate.
A fine bubble generator using a perforated plate.

3. The method of claim 2,
Further comprising a rotating device for rotating a rotating shaft connected to at least one of said at least two perforated plates and a perforated plate connected to said rotating shaft,
A fine bubble generator using a perforated plate.

The method of claim 3,
Wherein the rotating shaft is eccentrically connected to at least one of the two or more punch plates.
A fine bubble generator using a perforated plate.

5. The method of claim 4,
Wherein the chamber includes a projection having a diameter increased to eccentrically rotate in the chamber, the perforation plate connected to the eccentric rotation axis,
And the perforated plate connected to the eccentric rotation axis is disposed in a region where the protrusion is formed.
A fine bubble generator using a perforated plate.