KR102093837B1 - Nano-bubble generating and gas-liquid mixing apparatus - Google Patents

Abstract

The present invention relates to a device for generating nano-bubbles and mixing gas by using one pump. The device comprises: a circulating pipe which connects an inlet pipe and an outlet pipe of a pump, recovers a part of a discharged liquid, and transfers the same to the inlet pipe; a gas supplying unit which is connected to one side of the circulating pipe with an air duct and supplies external air; and a mixing unit which includes a plurality of impellers and a plurality of chambers for storing each impeller on one axis in order to compress and mix water received through the inlet pipe and gas supplied through the air duct with high pressure and repeatedly apply strike to the mixture of water and gas. A connecting unit of the air duct and the circulating pipe is connected with a three-way valve. The three-way valve allows gas supplied through the air duct to be absorbed inside the circulating pipe. Provided is a venturi pipe structure having a wide inlet, a wide outlet, and a narrow inside along the circulating pipe to be mixed with a liquid (water) of the circulating pipe. The external air selects at least one species from a gas group including air, oxygen (O_2), nitrogen (N_2), ozone (O_3), and carbon dioxide (CO_2).

Description

Nano bubble generation and gas mixing device {NANO-BUBBLE GENERATING AND GAS-LIQUID MIXING APPARATUS}

The present invention relates to a device for generating nanobubbles by dissolving gas in a liquid, and more particularly, to a device capable of generating nanobubbles and gas mixing using a single pump.

Recently, various fields of application and effects of high concentration of dissolved water (eg, oxygen water, ozonated water, hydrogen water, nitrogen water, etc.), which increased the dissolution rate by dissolving the gas in water, are known, and various studies on the technology of dissolving the gas in liquid Is going on. In addition, as the function of the nanobubble as a means for dissolving the gas is known, research on this has been actively conducted.

On the other hand, according to the applicant's registered patent publication No. 1969772, there is disclosed a "gas dissolved water generating device for increasing the gas dissolution rate and generating ultra-fine foam". According to this patent, a gas-dissolved water generator for dissolving gas in a liquid to increase gas dissolution rate, wherein a pressure pump and a multi-stage mixer are sequentially arranged on at least one pipeline, and the multi-stage mixer is a rotor around a motor shaft. And a mixing part having a meshing structure of the stator, the mixing part having a space part having a predetermined size on the inflow side, and the space part is on the motor shaft at a position spaced a predetermined distance from the coupling part of the rotor and the stator in the mixing part. It is formed by installing at least one or more stages of tooth blades of a predetermined radius. In the space portion, at least one stage of tooth blades of a predetermined size corresponding to the tooth blades is formed on the inner wall of the mixing portion for interaction with the tooth blades. A gas-dissolved water generating device characterized in that it is further installed, in which gaseous substances mixed in ultrafine foam are dissolved and acid in water. It will have to increase efficiency.

However, the above configuration has a pressurized pump and a multi-stage mixer, and in particular, in the case of a multi-stage mixer, is composed of a mixing unit having a meshing structure of a plurality of rotors and stators around a motor shaft, and the mixing unit has a predetermined size on the inflow side. It is provided with a space part, and the space part is a structure formed by installing at least one stage of tooth blades of a predetermined radius on the motor shaft at a position spaced apart from a coupling part of a rotor and a stator in a mixing part, and the configuration of the device is very high. It has the disadvantage of being complicated and complicated to assemble.

Accordingly, the present invention has been developed to solve the above problems, and aims to provide a device capable of generating nanobubbles and gas mixing by simply configuring the impeller while simultaneously covering the functions of a pressure pump and a multi-stage mixer.

According to one aspect of the present invention for achieving the above object, as a device capable of nanobubble generation and gas mixing with a single pump, by connecting the inlet pipe and the discharge pipe of the pump and recovering a part of the discharge fluid, The circulation pipe to be transferred to the inlet pipe, the gas supply unit connected to the supply pipe to one side of the circulation pipe to supply outside air, and the water introduced through the inlet pipe and the gas supplied through the supply pipe at high pressure Includes a mixing unit in which a plurality of chambers accommodating a plurality of impellers and their respective impellers on one axis to compress and mix and repeatedly strike, and the connecting portion of the supply pipe and the circulation pipe is connected by a three-way valve In the three-way valve, the gas supplied through the supply pipe itself is sucked into the circulation pipe itself, and thus the fluid (or ) And along said circulation pipe so that the mixture is provided as a Venturi tube structure, the entrance and exit of large inside is narrow, the atmosphere is air (Air), oxygen (O _2), nitrogen (N _2), ozone (O _3), There is provided a nanobubble generation and gas mixing device, characterized in that at least one or more selected from the gas group containing carbon dioxide (CO ₂ ).

According to the present invention, the impeller is connected to the motor shaft in a state accommodated in each chamber, and a plurality of blades are formed around the shaft hole where the motor shaft is fitted, and each blade is curved at a distance from each other in a constant direction. It is provided in the form, between each blade is provided in a structure open in the outer direction with respect to the shaft hole, the impeller is a cross-section cover impeller provided with a cover plate (rear cover plate) only on the rear side of the blade, the front And a double-sided cover-type impeller having cover plates (front cover plate and rear cover plate) on both rear sides, and the shaft hole formed in the center of the rear cover plate is engaged with gears on the surface of the motor shaft along the inner periphery. A groove is formed, and the front cover plate of the double-sided cover impeller is centered at the rear cover plate so that water can flow from the front. The ball inlet is formed in a large diameter than the axial bore, the end face cover impeller preferably has a structure of the blade is exposed to the front side from which the water flows as a front cover plate structure removed.

In addition, each of the chambers in which the impeller is accommodated is coupled to each other in the front-rear direction while being mounted on the motor shaft, and the shaft holes of the chambers through which the motor shaft passes are supported on the bearing surface around the motor shaft. Maintaining the state, it is preferable that the mixing part is arranged in an alternating direction in the front-rear direction and the chamber accommodating the double-sided cover-type impeller so that the double-sided cover-type impeller and the double-sided cover-type impeller are alternately arranged. In the present invention, each blade of the single-sided cover-type impeller and the double-sided cover-type impeller has a plurality of cut passages along a lengthwise end of the curve, and is alternately accommodated in each of the chambers tightly coupled in the front-rear direction. The double-sided cover-type impeller and the single-sided cover-type impeller have a curved direction of the blades opposite each other. It, and the end face cover type impeller and the double-side cover type impeller head may further include at least one of which being at least a large number of projections are formed along the outer circumferential edge of the rear cover plate.

According to the present invention, it may further include a structure in which a plurality of blades are formed around the shaft hole on both front and rear sides of the rear cover plate, in which case the blades formed on the front surface of the rear cover plate and the rear cover plate It is preferable that the blades formed on the rear side are configured such that the curved directions of the blades are directed in opposite directions to each other.

According to the present invention from the above-described features, the structure is simpler than the combined configuration of the pressure pump and the multi-stage mixer in the prior art, but it is possible to generate finer nanobubbles and gas-liquid mixing only by the configuration of the impeller and the chamber containing the same. .

1 is a block diagram of the nano-bubble generation and gas mixing device according to the present invention,
2 is a perspective view showing various types of impellers constituting the device of FIG. 1;
3 is an exploded perspective view showing the arrangement of a plurality of impellers according to FIG. 2 and a chamber in which these impellers are accommodated;
Figure 4 is an assembled cross-sectional view of the impeller and the chamber having the arrangement of Figure 3,
Figure 5 is a perspective view showing a modification 1 of the impeller according to Figure 2,
Figure 6 is a perspective view showing a modification 2 of the impeller according to Figure 2,
7 is a perspective view showing a modification 3 of the impeller according to FIG. 2;

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings and examples.

In the following embodiments, the illustration and description are omitted except for inevitable parts in describing the invention, and the same reference numerals are assigned to the same similar elements throughout the specification, and detailed description thereof will be omitted without being repeated. do.

Figure 1 shows the configuration of the nanobubble generation and gas mixing device according to the present invention, the nanobubble generation and gas mixing device of the present invention is air (Air), oxygen (O ₂ ), nitrogen (N ₂ ) in the fluid ), Ozone (O ₃ ), carbon dioxide (CO ₂ ), etc., by selectively minimizing and mixing nanobubbles to increase the gas dissolution rate by increasing the gas dissolution rate, thereby improving the water quality of reservoirs, aquariums, farms, or drinking water, washing water, or It can be used for the purpose of providing sterilized water.

The nanobubble generation and gas mixing device of the present invention has a configuration in which a pressure pump and a multi-stage mixer are sequentially arranged on one pipeline in a conventional gas dissolved water generation device, and one pump combines nanobubble generation and gas mixing functions. It is configured to have (100; hereinafter referred to as 'pump'), a circulation pipe 103 for connecting the inlet pipe 101 and the outlet pipe 102 of the pump 100 is installed on the pipeline, the It provides a configuration in which a predetermined gas supply unit 200 for supplying outside air is connected to one side of the circulation pipe 103 connected to the inlet pipe 101 of the pump 100.

The circulation pipe 103 recovers a portion of the fluid (or water) compressed and generated by the primary nanobubble by the pump 100 and transfers it to the pump inlet pipe 101 which is a low pressure portion, as described above. A gas supply unit 200 for supplying outside air may be connected to one side of 103. Here, at least one or more of the various gas groups including air (Air), oxygen (O ₂ ), nitrogen (N ₂ ), ozone (O ₃ ), and carbon dioxide (CO ₂ ) may be selected.

The gas supply unit 200 is connected to the circulation pipe 103 through the supply pipe 201, and the supply pipe 201 includes a flow valve 202 for adjusting the amount of gas supplied from the gas supply unit 200, A check valve 203 for preventing backflow of gas or high pressure water may be provided. In addition, the connecting portion of the supply pipe 201 and the circulation pipe 103 is connected to a three-way valve 104, and the three-way valve 104 is a venturi pipe having a wide inlet and an outlet and a narrow interior along the circulation pipe 103. It is preferred to be provided in a structure. In this configuration, the fluid (or water) transferred to the pump inlet pipe 101, which is the low-pressure portion along the circulation pipe 103, has a sudden drop in pressure while passing through the bottleneck of the venturi pipe, and the flow rate is greatly increased, and thus the gas The gas supplied from the supply unit 200 through the supply pipe 201 is mixed with the fluid (or water) inside the circulation pipe 103 by being self-aspirated into the circulation pipe 103 without forcibly pushing it into a separate power source. . Here, the supplied gas is at least one or more among various gas groups including air (Air), oxygen (O ₂ ), nitrogen (N ₂ ), ozone (O ₃ ), and carbon dioxide (CO ₂ ), as described above. This may be selected, and depending on the application, it is possible to generate oxygen-dissolved oxygen water, nitrogen-dissolved nitrogen water, ozone-dissolved ozone water, carbon dioxide-dissolved carbon water, and the like.

The inlet piping 101 and the outlet piping 102 of the pump 100 may be provided with opening and closing valves 101a and 102a, respectively, to control the flow rate of the water supply or discharge fluid and to open and close the flow path. In addition, although not shown at the end of the circulation pipe 103, that is, the connection portion of the discharge side pipe 102 and the circulation pipe 103 of the pump 100, a pressure gauge (hydraulic sensor) for measuring and sensing the pressure of the fluid and A safety sensor for applying a water-free signal may be provided.

In the present invention, the pump 100 compresses and mixes water introduced through the water supply pipe (entrance-side piping 101) and gas supplied through the supply pipe 201 at high pressure through a plurality of impellers and chamber structures and repeatedly strikes them. By applying, the operation of the pump 100 generates bubbles by using cavitation generated in the fluid at this time. For this operation, the pump 100 includes a plurality of impellers 110 on one axis and a mixing unit 105 in which a plurality of chambers 120 accommodating the respective impellers are built, respectively. The impeller 110 is connected to the shaft (motor shaft) 131 of the motor 130 in a form accommodated in each chamber 120, and each chamber 120 has a bearing portion (a number of The bearing or bushings 132 remain supported.

FIG. 2 shows various types of impellers constituting the apparatus of FIG. 1, and these impellers 110 have a plurality of blades 112 around the shaft hole 111 into which the motor shaft 131 is fitted. As it is formed, each blade 112 is provided in a curved shape spaced from each other in a constant direction, and between each blade 112 is provided in an open structure in the outer direction around the shaft hole 111. In addition, the impellers 110 are provided with a cover plate (i.e., a 'rear cover plate'; 113) only at the rear side of the blades 112, and a front and rear side impeller 100 (see FIG. 2B). It may be provided as a cover plate, that is, a double-sided cover-type impeller 110 with a front cover plate 114 and a rear cover plate 113 (see FIG. 2A). Shaft hole formed in the center of the rear cover plate 113 (111) is a gear groove (111a) that is engaged with a gear (131a, see FIG. 3) on the surface of the motor shaft (131) along the inner periphery, in the case of a double-sided cover impeller (110 ") front cover plate 114 ) Is inlet hole (114a) of a diameter larger than the shaft hole 111 of the rear cover plate 113 is formed in the center so that water can flow from the front, the cross-section cover type impeller (110 ') is the front cover plate Since the structure is removed, there is no need for an inlet hole, and the blade 112 is exposed to the front side where water is introduced. It is preferable that the impellers are alternately arranged in the pump 100 as described below. The fluid (or water) introduced into the pump is mixed, compressed, and refined while rotating at a high speed by the blade.

FIG. 3 is an exploded perspective view showing the arrangement of a plurality of impellers according to FIG. 2 and a chamber in which these impellers are accommodated, and FIG. 4 is an assembled cross-sectional view of the impeller and chambers having the arrangement relationship of FIG. 3, and each impeller as described above The chambers 120 in which the 110s are accommodated are coupled to each other in the front-rear direction while being mounted on the motor shaft 131, and the shaft hole 121 of each chamber 120 through which the motor shaft 131 passes It is maintained in a state supported on the surface of the bearing portion 132 around the motor shaft 131, and each of the impellers 110 has a gear groove 111a formed in the central shaft hole 111, a gear on the surface of the motor shaft 131 It is meshed with (131a) and rotates together when the motor is driven.

The chambers 120 have an open structure in which the front side through which water flows in, and it is preferable that an outlet hole 122 through which water flows out along the inner circumferential tip around the central axial hole 121 is formed. In addition, the front side of the impeller 110 accommodated in each chamber 120 is preferably arranged to be directed toward the bottom of the pump to which the water flows.

The arrangement of a plurality of such impellers and chambers is an arrangement in which the single-sided cover-type impeller 110 'and the double-sided cover-type impeller 110 "are alternately built with respect to each chamber 120 that is closely contacted and coupled in the front-rear direction, For example, as shown in FIG. 4, the chamber 120 accommodating the double-sided cover-type impeller 100 "and the chamber 120 accommodating the single-sided cover-type impeller 110 'are preferably alternately arranged in the front-rear direction. Do.

FIG. 5 shows one modification of the impellers according to FIG. 2, wherein each blade 112 of the single-sided cover-type impeller 110 ′ and the double-sided cover-type impeller 110 ″ has multiple parts along the length of the curve. The cut passages 112a may provide more impact and change in flow rate as the fluid (or water) rotates along the blade 112. The water molecules collide through the cut passages 112a on the blade, thereby making it possible to further refine the water molecules.

FIG. 6 shows another modified example of the impellers according to FIG. 2, wherein the double-sided cover-type impeller 110 "and the single-sided cover-type impeller 110 'that are alternately accommodated inside the respective chambers that are tightly coupled in the front-rear direction are shown. The curved direction of the blades 112 may be configured to face each other in the opposite direction, for example, when the curved direction of the blades in the double-sided cover impeller is formed in the same direction as the rotational direction of the motor shaft, the double-sided cover impeller. It is preferable that the blades of the single-sided cover-type impeller installed next to are formed in a direction opposite to the rotational direction of the motor shaft, and in the opposite case, the curved direction of the blades of the single-sided cover-type impeller is the same direction as the rotational direction of the motor shaft. When formed of, the blades of the double-sided cover-type impeller installed next to the single-sided cover-type impeller are motors It is preferable to be formed in a direction opposite to the rotational direction of the shaft. When the curved direction of the blades in the front-rear direction is reversed, the flow of the water flowing by the impeller in front collides or changes direction by the impeller in the rear. Vortices are generated between the molecules, and eventually mixing of the supplied gas and liquid (water) becomes smoother and the generation of bubbles can be further refined.

Meanwhile, although this modification is not illustrated in the drawings, a plurality of blades 112 may be formed on the front and rear surfaces of the rear cover plate 113 around the shaft hole 111. In this case, it is preferable that the blades formed on the front side of the rear cover plate and the blades formed on the rear side of the rear cover plate are configured such that the curved directions of these blades are directed in opposite directions to each other, thereby further creating flow and vortex generation. Can accelerate.

FIG. 7 shows another modification of the impellers according to FIG. 2, wherein each of the impellers, that is, the single-sided cover impeller 110 ′ and the double-sided cover-type impeller 110 ″, is at least of the rear cover plate 113. A plurality of protrusions 115 may be provided along the outer periphery. These protrusions 115 are spaced apart from the end of each blade 112, and water molecules discharged to the outside of the impeller while rotating along each blade are discharged. By colliding in the process, water molecules can be further refined.

Although not illustrated through the above-described embodiments and modifications, the modifications of FIGS. 5 to 7 may be provided in a form in which at least one is coupled to each other, and also the modifications of FIGS. 5 to 7 or these modifications In the case of the combined form of the example, it is possible to configure the combined form of at least one or more in the embodiment of FIG. 2. Through this, the present invention further accelerates the collision and vortex generation of water molecules, thereby enabling generation of ultra-fine-strength bubbles, that is, nanobubbles, through mixing of gas and liquid (water) and refinement of water molecules.

Although various embodiments of the present invention have been described above, the contents described so far are merely illustrative of some of the preferred embodiments of the present invention, except that they may appear in the appended claims. It is not limited by the above. Therefore, the present invention understands that those skilled in the same technical field can make many changes, modifications, and replacements of equivalents without departing from the technical spirit and gist of the invention within the scope of the following claims. Will have to.

100: pump
101: inlet piping
102: discharge side piping
101a, 102a: open / close valve
103: circulation tube
104: three-way valve
105: mixing unit
110,110 ', 110 ": Impeller
111,121: Shaft hole
111a: Gear groove
112: blade
112a: passage
113: rear cover plate
114: front cover plate
114a: Inlet hole
115: projection
120: chamber
130: motor
131: motor shaft
131a: Gear
132: bearing
200: gas supply unit
201: Air supply pipe
202: flow valve
203: check valve

Claims (5)

A device capable of generating nanobubbles and gas mixing with a single pump, which connects an inlet pipe and an outlet pipe of the pump and recovers a portion of the discharge fluid and transfers it to the inlet pipe, and one side of the circulation pipe It is connected to the supply pipe to the gas supply unit for supplying the outside air, and the water introduced through the inlet pipe and the gas supplied through the supply pipe to be compressed and mixed at high pressure and repeatedly hit on one axis It includes a plurality of impellers and a mixing unit in which a plurality of chambers accommodating each of these impellers are built-in, and the impellers are connected to a motor shaft in a state accommodated in each chamber, and are centered around a shaft hole through which the motor shaft is fitted. Blades are formed, and each blade is provided in a curved shape spaced from each other in a certain direction, and each blade Between is provided in a structure open in the outer direction with respect to the shaft hole, the impeller is a cross-section cover type impeller provided with a cover plate (rear cover plate) only on the rear side of the blades, and a cover plate (front and rear both sides) It is composed of a double-sided cover-type impeller equipped with a cover plate and a rear cover plate, the mixing portion has a configuration in which the single-sided cover-type impeller and the double-sided cover-type impeller are alternately arranged, and each chamber in which the impeller is accommodated A structure in which the front side on which the water flows in is opened, and coupled to each other in the front-rear direction while being mounted on the motor shaft, and the shaft holes of the chambers through which the motor shaft passes are supported on the bearing surface around the motor shaft. Nanobubble, characterized in that an outlet hole is formed in which water flows out along the inner circumferential tip around the central axial hole. And gas mixing device. According to claim 1,
The shaft hole formed in the center of the rear cover plate is formed with a gear groove meshing with the gear on the surface of the motor shaft along the inner circumference, and the front cover plate of the double-sided cover impeller is centered so that water can flow from the front. Nanobubble generation and characterized in that the inlet hole of a diameter larger than the axial hole of the rear cover plate is formed, and the cross-section cover-type impeller has a structure in which the front cover plate is removed and the blade is exposed to the front side where water flows in. Gas mixing device. delete According to claim 2,
The mixing part is characterized in that the chamber containing the double-sided cover-type impeller and the chamber containing the single-sided cover-type impeller are alternately arranged in the front-rear direction so that the single-sided cover-type impeller and the double-sided cover-type impeller have alternating configurations. Nano bubble generation and gas mixing device. According to claim 2,
Each of the blades of the single-sided cover-type impeller and the double-sided cover-type impeller has a shape having a plurality of cut passages along the length of the curved end, and the double-sided cover-type impeller and the single-sided cover-type impeller have opposite blades in a curved direction. Formed in the direction, the single-sided cover-type impeller and the double-sided cover-type impeller are formed with a plurality of protrusions along at least the outer periphery of the rear cover plate, and a plurality of blades around the shaft hole on both front and rear sides of the rear cover plate Nanobubble generation and gas mixing device, wherein the blades formed on the front surface of the rear cover plate and the blades formed on the rear side of the rear cover plate further include at least one of a shape in which the curved directions of the blades are opposite to each other. .

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