KR102208338B1 - A Micro-buble generating nozzle - Google Patents

Abstract

The present invention relates to a microbubble generating nozzle for supplying micrometer-sized microbubbles in water to improve the quality of water in river water, sewage treatment plants, pumping plants, etc. More specifically, the present invention relates to a microbubble generating nozzle in which, in order to improve a purification effect of contaminants, the size of microbubbles is generated as uniformly as possible and the amount of the microbubbles within a certain range regardless of the flow rate change is maintained.

Description

{A Micro-buble generating nozzle}

The present invention relates to a nozzle for generating micro-bubbles for supplying micro-bubbles of micrometer size into water to improve water quality in river water, sewage treatment plants, pumping stations, etc., and more particularly, to improve the purification effect of pollutants. The present invention relates to a nozzle for generating microbubbles that uniformly generates as much as possible and maintains the amount of microbubbles within a certain range regardless of a change in flow rate.

Sewage or wastewater such as livestock wastewater, domestic wastewater, industrial wastewater, and waste leachate that worsens water quality due to factors such as industrial development, population growth, and urbanization is increasing. As such, contaminated wastewater or sewage discharged in large quantities every day causes various secondary environmental pollution such as soil pollution, drinking water pollution, ecological environment destruction, etc., so the treatment of sewage wastewater has emerged as a very important environmental problem.

As a general water treatment method, a biochemical treatment method that applies a neutralizing agent, a coagulant, a disinfectant, etc., a physical treatment method such as filter treatment or screen removal, or a method of mixing them are used. The flotation separation method, which removes pollutants through force, is also applied alone or in the same way as other water treatment methods (Korean Patent Publication No. 869312). For example, in the sewage treatment field, a flotation separation process is applied for the purpose of separating and concentrating sludge, and in the water treatment field, a flotation separation process is applied for the purpose of floating and removing ordinary suspended substances and algae that are difficult to settle. Are doing.

The smaller the diameter of the air bubbles used in the flotation separation method and the more large quantities of air bubbles are generated, the surface area increases compared to general air bubbles, which improves the ability to dissolve gas or remove foreign substances, and increases the residence time in water due to the slow rising speed in water. Thus, the effect of removing pollutants is greatly improved.

Therefore, in order to improve the purification effect of the flotation separation method, it is necessary to generate microbubbles in the range of 10 to 100㎛ in diameter, but gases such as oxygen, ozone, and carbon dioxide that form microbubbles have low solubility in water. As a result, it is difficult to generate microbubbles of a certain size.

As a conventional technique for generating a large amount of microbubbles, Korean Patent No. 10-1144705 or Korean Patent No. 10-0938899 discloses a technique for generating microbubbles by causing a fluid to collide with a collision member (see Fig. 1). . However, in the prior art, the fluid collides with the fixed collision member at high speed to generate large quantities of microbubbles, but there is a problem in that it is difficult to generate microbubbles of a certain size because there is no means for adjusting the size of the microbubbles. .

In addition, when the quality of sewage or wastewater changes due to torrential rain or typhoon, it is necessary to constantly adjust the amount of microbubbles generated according to the water quality. However, in the case of the collision-type microbubble generator described in the prior art, since the distance between the fixed collision member and the fluid injection port is always constant, when the flow rate of the fluid decreases regardless of the water quality, the amount of microbubbles generated decreases or does not occur. There are structural limitations that may or may not be.

Therefore, even if the water quality is good, the micro-bubble generator of the prior art must supply a certain amount of fluid to generate micro-bubbles. Therefore, the micro-bubble generator generates more micro-bubbles than necessary, and the operating efficiency of the micro-bubble generator decreases. There is a problem that the maintenance cost is required more than necessary.

In order to solve the above problems, it is an object of the present invention to provide a microbubble generating nozzle that generates a large amount of microbubbles but generates the size of microbubbles as uniformly as possible in order to improve the purification effect of contaminants.

In addition, it is an object of the present invention to provide a fine bubble generating nozzle that maintains the generation amount of fine bubbles within a certain range irrespective of a change in flow rate.

In addition, it is an object of the present invention to improve the purification effect of pollutants by adjusting the injection distance or the injection range of microbubbles in consideration of water quality or pollutant distribution.

The present invention according to an embodiment generates microbubbles including a tubular microbubble generating unit 110 and a tubular gas mixing unit 210 that couples the microbubble generating unit 110 and fluid to flow In the nozzle 100,

The tubular microbubble generator 110 includes a nozzle head 120 fastened to the top thereof, a discharge plate 130 inserted into the nozzle head 120, and one side of the discharge plate 130 A plurality of guide bars 132 and an elastic body 134 installed on, a collision plate 140 supported by the elastic body 134 and guided by the guide bar 132, installed on the collision plate 140 A flow rate control stopper 150, including a diaphragm 160 in which a flow rate control hole 161 in which the flow rate passing area is changed by the flow rate control stopper 150 is formed,

The tubular gas mixing unit 210 has a wide cross-sectional area at the inlet side through which the inflow water is introduced, and a venturi part 230 gradually narrows in cross-sectional area toward the middle part, and gradually cross-sectional area after passing through the venturi part 230 It has this widening structure, characterized in that the gas inlet 220 is connected to the venturi part 230.

In addition, in the present invention, the nozzle head 120 has a spray path 121 through which fine bubbles pass, and a spiral guide 122 is formed in the spray path 121 so that the micro bubbles are ejected in a spiral shape. , At the bottom of the nozzle head 120, a receiving groove 123 in which the discharge plate 130 is installed is formed.

In addition, in the present invention, the discharge plate 130 is inserted into the receiving groove 123 in the shape of a plate body, and a plurality of discharge holes 131 through which fine bubbles pass are formed, and the discharge hole 131 They are inclined at a predetermined angle, but are inclined in the same direction as the direction of rotation of the spiral guide 122.

In addition, in the present invention, the collision plate 140 has a plurality of protrusions 143 formed on the inclined surface 142 in order to promote the generation of fine bubbles, and the influent water colliding with the plurality of protrusions 143 is the discharge plate 130 The inclined surface 142 is formed to be inclined toward the circumferential side from the center of the collision plate 140 so as to be easily discharged, and a flow path (not shown) is formed in a radial form on the inclined surface 142 between the plurality of protrusions 143 It features.

In addition, in the present invention, the flow control stopper 150 is formed in a conical shape and is installed in the collision plate 140 to adjust the flow rate passage area of the flow control hole 161 formed in the diaphragm 160, and the elastic body Pressurized to contact the inclined surface of the flow control hole 161 by the elastic force of 134, the flow rate control hole 161 by the influent pressure of the gas mixing unit 210 discharged to the flow control hole 161 It is characterized in that the distance between the flow control hole 161 and the collision plate 140 and the influent water passage area of the flow control hole 161 are variable.

In addition, in the present invention, the influent water is ejected toward the impact plate 140 through the inclined hole 162 formed in the diaphragm 160, and the influent water ejected from the inclined hole 162 and the impact plate ( 140) and collide with each other to promote the generation of microbubbles.

In the micro-bubble generation nozzle according to the present invention, the collision plate has a plurality of protrusions to promote the generation of micro-bubbles, the influent water ejected from the inclined hole of the diaphragm and the influent water ejected from the flow control hole collide with each other, and the discharge plate is micro-bubble. By providing a plurality of discharge holes passing through, there is an effect of maximizing the purification effect of wastewater or contaminated water by generating a large amount of fine bubbles of a certain size.

In addition, the micro-bubble generating nozzle according to the present invention changes the influent water passage area of the flow control hole and the distance between the flow control hole and the collision plate according to the elastic force of the elastic body and the influent pressure of the gas mixing part. There is an effect of maintaining the generation amount of air bubbles within a certain range.

In addition, in the present invention, the spiral guide of the nozzle head and the discharge holes of the discharge plate are inclined in the same direction, and by changing the inclination of the spiral guide and the diameter of the spray path, the spray distance or spray range of the microbubbles is considered to be water quality or pollutant distribution. By controlling it, there is an effect of improving the purification effect of pollutants.

1 is a conventional collision type microbubble generator
Figure 2 is an assembly perspective view of the fine bubble generating nozzle according to an embodiment of the present invention
3 is an exploded perspective view of a fine bubble generating nozzle according to an embodiment of the present invention
4 is a detailed view of a collision plate according to an embodiment of the present invention
5 is a cross-sectional view of a main part of a fine bubble generating nozzle according to an embodiment of the present invention
6 is an operation state diagram of the fine bubble generating nozzle according to an embodiment of the present invention

Hereinafter, the present invention will be described in detail with reference to the drawings. It is to be understood that the present invention includes various modifications, may have various forms, and include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

2 and 3, the micro-bubble generating nozzle 100 according to an embodiment of the present invention is coupled to a tubular micro-bubble generating unit 110 and the micro-bubble generating unit 110 so that a fluid is circulated. It includes a tubular gas mixing unit 210.

The tubular microbubble generator 110 includes a nozzle head 120 fastened to the top thereof, a discharge plate 130 inserted into the nozzle head 120, and one side of the discharge plate 130 A plurality of guide bars 132 and an elastic body 134 installed on, a collision plate 140 supported by the elastic body 134 and guided by the guide bar 132, installed on the collision plate 140 It includes a flow rate control stopper 150, a diaphragm 160 in which a flow rate control hole 161 in which a flow rate passage area is changed by the flow rate control stopper 150 is formed.

The nozzle head 120 of the micro-bubble generator 110 is a means for ejecting micro-bubbles to the outside, and the nozzle head 120 is fastened to the upper end of the micro-bubble generator 110, and the micro-bubbles inside An injection path 121 to pass through is provided. A spiral guide 122 is formed in the injection path 121 so that micro bubbles are ejected in a spiral manner, and a receiving groove 123 in which a discharge plate 130 is installed is provided at the lower end of the nozzle head 120.

The discharge plate 130 is a means for performing the role of a walking net to discharge only fine bubbles of a size desired by the user to the outside. The discharge plate 130 is inserted into the receiving groove 123 in the shape of a plate body, and a plurality of discharge holes 131 through which micro bubbles pass are formed. The discharge holes 131 are formed to be inclined at a predetermined angle, and the inclined direction of the discharge hole 131 is inclined in the same direction as the rotation direction of the spiral guide 122. Accordingly, the microbubbles ejected through the nozzle head 120 rotate along the inclined angle and direction of the discharge hole 131 to generate a vortex.

In addition, since the size of the micro-bubbles can be changed by changing the size of the discharge hole 131 of the discharge plate 130, the user can change the size of the micro-bubbles ejected through the injection path 121 only by replacing the discharge plate 130. Can be easily adjusted.

Meanwhile, a plurality of guide bars 132 for guiding the collision plate 140 are screwed to one side of the discharge plate 130, and an elastic body 134 for elastically supporting the collision plate 140 is installed.

As shown in Fig. 4, the collision plate 140 has an inclined surface 142 for generating micro bubbles by colliding with the influent water flowing from the gas mixing unit 210, and a protrusion 143 for increasing the impact force of the influent water. The elastic body 134 for elastically supporting the collision plate 140 is installed on the opposite side where the inclined surface 142 is formed.

The inclined surface 142 is inclined so that the impacted influent water flows to the edge of the collision plate 140, and if necessary, a flow path (not shown) through which the influent flows is radially inclined from the center of the collision plate 140. Can be formed on.

In addition, the plurality of protrusions 143 are formed on the inclined surface 142 radially from the center of the collision plate 140, and the flow path (not shown) is radially formed on the inclined surface 142 between the plurality of protrusions 143. Can be formed.

The elastic body 134 has one end installed and fixed in an installation groove 144 formed on the inclined surface 142 of the collision plate 140, and the other end is fixed to the discharge plate 130. The shape of the elastic body 134 may be a coil spring as shown in FIG. 4, or may be a plate spring or other type of elastic body, and the elastic modulus of the elastic body 134 is determined by the influent water colliding with the collision plate 140. It is sufficient to sufficiently elastically support the impact force generating microbubbles.

The flow control stopper 150 is installed on the collision plate 140 to adjust the flow rate passage area of the flow control hole 161 formed in the diaphragm 160. The flow control stopper 150 is formed in a conical shape, and is pressed to contact the inclined surface of the flow control hole 161 by the elastic force of the elastic body 134. The flow control stopper 150 pressurized by the elastic force of the elastic body 134 is spaced apart from the slope of the flow control hole 161 by the influent pressure of the gas mixing unit 210 discharged to the flow control hole 161, and thus Inflow water is pressed toward the collision plate 140 and ejected through a gap between the spaced flow control stopper 150 and the inclined surface of the flow control hole 161.

In addition, the flow control stopper 150 forms a plurality of branch holes 151 on the conical inclined surface so that a part of the influent water is ejected in a state pressed to the center of the collision plate 140 through the branch hole 151.

The diaphragm 160 is installed at the inlet of the microbubble generator 110 through which the influent water of the gas mixing part 210 flows, and a flow control hole 161 is formed in the central part of the diaphragm 160, and a flow control hole (161) A plurality of inclined holes 162 are formed along the circumferential direction. The influent water of the gas mixing unit 210 is pressurized while passing through the inclined hole 162 and collides with the collision plate 140 to generate microbubbles, and the gap between the flow control hole 161 and the flow control stopper 150 Also, the influent water is pressed toward the collision plate 140 and ejected. Here, the inclination angle of the inclined hole 162 is formed such that the influent water passing through the inclined hole 162 collides with the inflow water passing through the gap of the flow rate control hole 161 as shown in FIG. 6.

The gas mixing unit 210 is coupled to the lower portion of the microbubble generator 110 in the shape of a tube that is open up and down, and the inlet side through which the influent water is introduced has a wide cross-sectional area, and the cross-sectional area gradually narrows toward the middle portion. 230 is formed, and has a structure in which the cross-sectional area gradually increases after passing through the venturi part 230, and the gas inlet 220 is connected to the venturi part 230.

Referring to Figs. 5 and 6, the influent water flowing into the gas mixing unit 210 has a wide cross-sectional area at the inlet side of the gas mixing unit 210, so there is no change in the flow rate of the influent water. The flow velocity increases while passing through the narrowing venturi unit 230, and through this process, air or gas such as ozone introduced through the gas inlet 220 is easily introduced into the influent water.

The influent water mixed with gas in the gas mixing unit 210 flows into the microbubble generator 110 through the inclined hole 162 formed in the diaphragm 160 of the microbubble generator 110.

At this time, the flow velocity of the inflow water increases as it passes through the inclined hole 162 of the diaphragm 160 with a small diameter, and collides with the impact plate 14 at a very high speed to generate a large amount of fine bubbles. In addition, the influent water is pressed toward the collision plate 140 and ejected through the gap between the flow control hole 161 and the flow control stopper 150. As described above, the influent water ejected from the inclined hole 162 and the influent water passing through the gap of the flow rate control hole 161 collide in the middle as shown in FIG. 6 to promote the generation of microbubbles. On the other hand, the influent water is ejected in a pressurized state to the center of the collision plate 140 even through the plurality of branch holes 151 of the flow control stopper 150 to promote the generation of microbubbles.

In addition, when the inflow water flow rate increases, the impact force applied to the impact plate 140 increases and the elastic body 134 is compressed. Accordingly, as the elastic body 134 supporting the impact plate 140 is compressed, the flow control hole 161 and the The distance between the collision plates 140 increases. And, the flow control stopper 150 is made in a conical shape, and when the influent flow rate increases and the elastic body 134 is compressed, the gap between the flow rate control hole 161 and the flow control stopper 150 increases, and the flow control hole 161 The area through which the influent water passes is increased.

Conversely, when the inflow water flow rate decreases, the impact force applied to the impact plate 140 is reduced and the elastic body 134 is restored. Accordingly, the elastic body 134 supporting the impact plate 140 is restored, and the flow control hole 161 and The distance between the collision plates 140 is reduced. In addition, the gap between the flow control hole 161 and the conical flow control stopper 150 is reduced, so that the influent water passage area of the flow control hole 161 is reduced.

At this time, the minimum inflow water passage area of the flow control hole 161 is set so that even when the inflow water flow rate is the minimum, the inflow water collides with the collision plate 140 to sufficiently generate microbubbles of a desired size. In addition, the minimum distance between the flow control hole 161 and the collision plate 140 is also set so that the influent water collides with the collision plate 140 to sufficiently generate microbubbles of a desired size even when the inflow water flow rate is minimum.

In this way, even if the influent flow rate changes, the influent water passage area of the flow control hole 161 and the distance between the flow control hole 161 and the collision plate 140 are varied, so that the size and size of microbubbles and The amount of generation can be maintained within a certain range.

In the collision plate 140 of the present invention, a plurality of protrusions 143 are formed on the inclined surface 142 to promote the generation of microbubbles, and the influent water colliding with the plurality of protrusions 143 is easily transferred to the discharge plate 130. The inclined surface 142 is formed to be inclined toward the circumferential side from the center of the collision plate 140 so as to be discharged, and a flow path (not shown) is formed in a radial shape on the inclined surface 142 between the plurality of protrusions 143.

The influent water containing a large amount of fine bubbles by colliding with the collision plate 140 is discharged to the nozzle head 120 through the discharge holes 131 of the discharge plate 130. The discharge hole 131 of the discharge plate 130 pulverizes microbubbles of influent water larger than the discharge hole 131 to discharge only microbubbles of a certain size, and also functions to prevent the microbubbles from agglomeration. ,

Further, the discharge holes 131 are formed to be inclined at a predetermined angle, so that the microbubbles rotate along the inclined angle and direction of the discharge hole 131 to generate a vortex. At this time, the inclined direction of the discharge hole 131 is inclined in the same direction as the rotational direction of the spiral guide 122 of the nozzle head 120.

The microbubbles flowing into the nozzle head 120 through the discharge holes 131 of the discharge plate 130 are discharged to the outside while a vortex flows along the spiral guide 122 formed in the injection path 121. The injection distance or the injection range of the fine bubbles ejected from the nozzle head 120 can be changed by adjusting the inclination of the spiral guide 122 and the diameter of the injection path 121. Accordingly, the nozzle head 120 having the inclination of the spiral guide 122 and the diameter of the spray path 121 suitable for the required specifications can be replaced to easily change the spray distance or spray range of the fine bubbles.

When the microbubble generating nozzle 100 according to an embodiment of the present invention is installed under a septic tank such as a sewage treatment plant or a wastewater treatment plant, a large amount of microbubbles of a certain size are generated regardless of a change in flow rate, thereby condensation of algae or suspended matter. The formed flocs can be easily removed.

In addition, the present invention can adjust the size or amount of microbubbles in consideration of the size of algae or suspended substances, distribution density in water, etc., or adjust the spraying range of microbubbles, thereby improving the efficiency of removing algae or suspended substances. have.

Although the present invention has been described in detail through specific embodiments, this is for explaining the present invention in detail, and the present invention is not limited thereto, and those of ordinary skill in the art within the technical scope of the present invention It is obvious that it can be modified or improved.

100: fine bubble generating nozzle 110: fine bubble generating portion
120: nozzle head 121: injection furnace
122: spiral guide 123: receiving groove
130: discharge plate 131: discharge hole
132: guide bar 134: elastic body
140: crash plate
141: coupling hole 142: slope
143: protrusion 144: mounting groove
150: flow control stopper 151: branch hole
152: support rod 160: diaphragm
161: flow control hole 162: inclined hole
200: gas mixing unit 210: gas inlet
220: Venturibu

Claims (6)

In the microbubble generating nozzle 100 comprising a tubular microbubble generating unit 110 and a tubular gas mixing unit 210 coupled so that a fluid flows with the microbubble generating unit 110,
The tubular microbubble generator 110 includes a nozzle head 120 fastened to the top thereof, a discharge plate 130 inserted into the nozzle head 120, and one side of the discharge plate 130 A plurality of guide bars 132 and an elastic body 134 installed on, a collision plate 140 supported by the elastic body 134 and guided by the guide bar 132, installed on the collision plate 140 A flow rate control stopper 150, including a diaphragm 160 in which a flow rate control hole 161 in which the flow rate passing area is changed by the flow rate control stopper 150 is formed,
The tubular gas mixing unit 210 has a wide cross-sectional area at the inlet side through which the inflow water is introduced, and a venturi part 230 gradually narrows in cross-sectional area toward the middle part, and gradually cross-sectional area after passing through the venturi part 230 With this widening structure, the gas inlet 220 is connected to the venturi part 230,
The nozzle head 120 is provided with an injection path 121 through which fine bubbles pass, and a spiral guide 122 is formed in the injection path 121 so that the fine bubbles are helically ejected, and the nozzle head 120 ) At the bottom, a receiving groove 123 in which the discharge plate 130 is installed is formed,
Easily change the spraying distance or spraying range of the microbubbles by replacing the nozzle head 120 with the inclination of the spiral guide 122 and the diameter of the spraying path 121 suitable for the required specifications Can,
The discharge plate 130 is inserted into the receiving groove 123 in the shape of a plate body, and a plurality of discharge holes 131 through which fine bubbles pass are formed, and the discharge holes 131 are inclined at a predetermined angle. But is inclined in the same direction as the direction of rotation of the spiral guide 122,
The collision plate 140 has a plurality of protrusions 143 formed on the inclined surface 142 in order to promote the generation of fine bubbles, and the influent water colliding with the plurality of protrusions 143 is easily discharged to the discharge plate 130. The inclined surface 142 is formed to be inclined from the center of the collision plate 140 to the circumferential side, and a flow path (not shown) is formed in a radial form on the inclined surface 142 between the plurality of protrusions 143,
The flow control stopper 150 is formed in a conical shape and is installed on the collision plate 140 to adjust the flow rate passage area of the flow control hole 161 formed in the diaphragm 160, and the elastic force of the elastic body 134 It is pressurized to come into contact with the inclined surface of the flow control hole 161, and is separated from the inclined surface of the flow control hole 161 by the influent pressure of the gas mixing unit 210 discharged to the flow control hole 161. The influent water passage area of the control hole 161 and the distance between the flow control hole 161 and the collision plate 140 are varied,
The influent water is ejected toward the collision plate 140 through the inclined hole 162 formed in the diaphragm 160, and the influent water ejected from the inclined hole 162 and the flow control hole 161 are ejected toward the collision plate 140 The influent water collides with each other to promote the generation of microbubbles,
Passing the influent water through the discharge hole 131 of the discharge plate 130 after passing through the collision plate 140 generating a large amount of fine bubbles,
The characteristic microbubble generation nozzle (100).


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