A micro bubble generator

Abstract

The present invention discloses a micro-bubble generator, comprising: a bottom plate, a sleeve, a cover plate, a diffuser, a guide tube, a guide column, a guide plate and a fluid inlet, wherein the bottom plate and the cover plate are respectively arranged at both ends of the sleeve, the diffuser is arranged on the cover plate, a swirl hole connecting the sleeve and the diffuser is arranged on the cover plate, the guide tube is arranged between the bottom plate and the sleeve to form a primary swirl zone, the guide column extends into the swirl hole and forms a high-speed swirl zone between the cover plate, the primary swirl zone is connected to the high-speed swirl zone, the fluid inlet is arranged on the side wall of the sleeve, the guide plate is arranged between the sleeve and the guide tube, so that the fluid passing through the fluid inlet forms a swirl around the guide tube. The micro-bubble generator provided by the present invention can tear bubbles in the fluid and cause cavitation to generate a large number of micro-bubbles even when the water pressure is not high.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment equipment, in particular to a micro bubble generator Background Art

[0002] According to the principle of generation, ultra-fine bubble generation technology can be divided into a variety of technical methods such as pressurized dissolved air release method, dispersed air method, jet aeration, ultrasonic cavitation method and electrolysis method. Among them, the main principle of the dispersed air method is to use hydraulic shearing, high-speed swirl and other methods to form shear force, and create an extreme condition to repeatedly shear and crush the air, so that it mixes with water to generate a large number of micro-nano bubbles. At present, there are many ultra-fine bubble generators, but they are often complex in structure, difficult to manufacture, and have high finished product costs, which is not conducive to popularization. Moreover, most products often only consider one technical means of realization, and have high requirements for hydraulic conditions. For example, the pressure requirement must not be less than 0.5Mpa, which is inconsistent with the advocated low energy consumption concept. For the current ultra-fine bubble generator, when the water pressure is relatively low, the swirl speed formed by the liquid is not high enough, and the shear air effect is weakened, resulting in a decrease in the number of micro bubbles generated by the mixing of gas and liquid. Summary of the invention

[0003] The object of the present invention is to provide a micro-bubble generator to solve the technical problem that the efficiency of the micro-bubble generator decreases when the fluid pressure decreases.

[0004] In order to achieve the above-mentioned purpose, the present invention provides a micro-bubble generator, comprising: a bottom plate, a sleeve, a cover plate, a diffuser, a guide tube, a guide column, a guide plate and a fluid inlet, the bottom plate and the cover plate are respectively arranged at both ends of the sleeve, the diffuser is arranged on the cover plate away from one end of the sleeve, the cover plate is provided with a swirl hole connecting the inner cavity of the sleeve and the inner cavity of the diffuser, the guide tube is arranged on the bottom plate, a primary swirl zone is formed between the guide tube and the sleeve, the guide column is arranged in the guide tube and extends into the swirl hole, a high-speed swirl zone is formed between the guide column and the cover plate, the primary swirl zone is connected to the high-speed swirl zone, the fluid inlet is arranged on the side wall of the sleeve and close to the bottom plate, the guide plate is arranged between the sleeve and the guide tube, so that the fluid passing through the fluid inlet forms a swirl around the guide tube.

[0005] Optionally, the diffuser port includes a conical inner cavity, and the inner diameter of the diffuser port gradually increases in a direction away from the cover plate.

[0006] Optionally, the cone angle of the inner cavity of the diffuser is 6-15 degrees.

[0007] Optionally, the guide plate is an arc-shaped plate, and one end of the guide plate is connected to the inner wall of the sleeve.

[0008] Optionally, the guide plate is an arc-shaped plate, and one end of the guide plate is connected to the inner wall of the fluid inlet.

[0009] Optionally, the guide plate is an arc-shaped plate, and the guide plate is connected to the bottom plate at a side close to the bottom plate.

[0010] Optionally, the height of the arc-shaped plate along the axial direction of the sleeve is greater than or equal to the inner diameter of the fluid inlet.

[0011] Optionally, a height of the guide sleeve along the axial direction of the sleeve is smaller than a height of the sleeve.

[0012] Optionally, the diameter of a section of the guide column located in the swirl hole gradually decreases in a direction away from the bottom plate.

[0013] Optionally, an air inlet is provided at one end of the guide column away from the diffuser, and an air outlet is provided at a section of the guide column located inside the swirl hole, and the air outlet connects the air inlet and the high-speed swirl area.

[0014] The present invention provides a micro-bubble generator, comprising: a bottom plate, a sleeve, a cover plate, a diffuser, a guide tube, a guide column, a guide plate and a fluid inlet, wherein the bottom plate and the cover plate are respectively arranged at two ends of the sleeve, the diffuser is arranged on the cover plate at one end away from the sleeve, a swirl hole connecting the inner cavity of the sleeve and the inner cavity of the diffuser is arranged on the cover plate, the guide tube is arranged on the bottom plate, a primary swirl zone is formed between the guide tube and the sleeve, the guide column is arranged in the guide tube and extends into the swirl hole, a high-speed swirl zone is formed between the guide column and the cover plate, the primary swirl zone is connected to the high-speed swirl zone, the fluid inlet is arranged on the side wall of the sleeve and close to the bottom plate, the guide plate is arranged between the sleeve and the guide tube, so that the fluid passing through the fluid inlet forms a swirl around the guide tube. The fluid flowing in through the fluid inlet forms a vortex under the action of the guide plate and enters the high-speed vortex area. Since the cross-sectional area of ​​the fluid is greatly reduced, the flow velocity is rapidly accelerated. Even when the water pressure is not high, the bubbles in the fluid will be torn into very small pieces. Finally, when passing through the diffusion zone, cavitation occurs between the gas and the liquid, further generating a large number of tiny bubbles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of a micro-bubble generator provided by one embodiment of the present invention;

[0016] Figure 2 is a cross-sectional view of a micro-bubble generator provided by one embodiment of the present invention;

[0017] Figure 3It is a schematic diagram of a micro-bubble generator with a hollow guide column provided in one embodiment of the present invention.

[0018] Among them: 1-bottom plate, 2-sleeve, 3-cover plate, 301-swirl hole, 4-diffuser, 5-guide tube, 6-guide column, 601-air inlet, 602-air outlet, 7-guide plate, 8-fluid inlet, 9-high-speed swirl area, 10-primary swirl area. DETAILED DESCRIPTION

[0019] The specific implementation of the present invention will be described in more detail below in conjunction with the schematic diagram. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in exact proportions, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0020] Figure 1 This is a front view of a micro bubble generator provided by one embodiment of the present invention. Figure 2 is a cross-sectional view of a micro-bubble generator provided by one embodiment of the present invention, see Figure 1 and Figure 2 As shown, the micro-bubble generator includes: a bottom plate 1, a sleeve 2, a cover plate 3, a diffuser 4, a guide tube 5, a guide column 6, a guide plate 7 and a fluid inlet 8, the bottom plate 1 and the cover plate 3 are respectively arranged at both ends of the sleeve 2, the diffuser 4 is arranged on the cover plate 3 away from the end of the sleeve 2, the cover plate 3 is provided with a swirl hole 301 connecting the inner cavity of the sleeve 2 and the inner cavity of the diffuser 4, the guide tube 5 is arranged on the bottom plate 1 and is located in the inner cavity of the sleeve 2, and the guide tube 5 and the sleeve 2 A primary swirl zone 10 is formed between the guide column 6, the guide column 6 is arranged in the guide tube 5 and extends into the swirl hole 301, a high-speed swirl zone 9 is formed between the guide column 6 and the cover plate 3 (the swirl hole 301 is larger than the diameter of the guide column 6), the primary swirl zone 10 is connected to the high-speed swirl zone 9, the fluid inlet 8 is arranged on the side wall of the sleeve 2 and close to the bottom plate 1, the guide plate 7 is arranged between the sleeve 2 and the guide tube 5, so that the fluid passing through the fluid inlet 8 forms a swirl around the guide tube 5. The fluid (a mixture of liquid and bubbles) flowing in through the fluid inlet 8 forms a vortex under the action of the guide plate 7 and flows around the guide tube 5, and enters the high-speed vortex zone 9 through the primary vortex zone 10. Since the cross-sectional area of ​​the fluid is greatly reduced, the flow rate of the fluid is rapidly accelerated. Even when the water pressure is not high (for example, the pressure is 0.1-0.5MPa), the bubbles in the fluid will be torn into very small pieces. Finally, when passing through the diffusion zone 4, cavitation occurs between the gas and the liquid, further generating a large number of tiny bubbles.

[0021] See also Figure 1 and Figure 2As shown, the diffuser 4 includes a conical inner cavity, and the inner diameter of the diffuser 4 gradually increases in the direction away from the cover plate 3. Specifically, the cone angle θ of the inner cavity of the diffuser 4 is 6-15 degrees. The main part of the guide plate 7 is an arc-shaped plate, and is arranged between the sleeve 2 and the guide tube 5. One end of the guide plate 7 is connected to the inner wall of the sleeve 2, or one end of the guide plate 7 is connected to the inner wall of the fluid inlet 8, or the side of the guide plate 7 close to the bottom plate 1 is connected to the bottom plate 1. The guide plate 7 is used to make the fluid passing through the fluid inlet 8 form a vortex around the guide tube 5, and its specific shape and installation method are not limited. The height of the arc plate 7 along the axial direction of the sleeve 2 is greater than or equal to the inner diameter of the fluid inlet 8, so that the fluid flowing in through the fluid inlet 8 is fully in contact with the guide plate 7 and forms a vortex under the action of the guide plate 7.

[0022] See also Figure 1 and Figure 2 As shown, the height of the guide tube 5 along the axial direction of the sleeve 2 is smaller than the height of the sleeve 2, so that a passage for fluid to pass through exists between the guide tube 5 and the cover plate 3. The upper end of the guide tube 5 (the end close to the cover plate 3) can be closed or not.

[0023] Figure 3 is a schematic diagram of a micro bubble generator with a hollow guide column provided in one embodiment of the present invention, see Figure 2 and Figure 3 As shown, the end face of the guide column 6 close to the diffuser 4 (the upper end face of the guide column 6) is coplanar with the end face of the cover plate 3 (the upper end face of the cover plate 3), or the upper end face of the guide column 6 is slightly higher / lower than the upper end face of the cover plate 3. The guide column 6 is provided with an air inlet 601 (the guide column 6 is further provided as a hollow tube) at one end away from the diffuser 4, and the guide column 6 is provided with an air outlet 602 at a section inside the swirl hole, and the air outlet 602 connects the air inlet 601 and the high-speed swirl zone 9. The end of the guide column 6 away from the diffuser 4 passes through the bottom plate 1 to connect the air intake. The gas introduced through the air inlet 601 can be oxygen, ozone, carbon dioxide, nitrogen, hydrogen, helium, ammonia and other suitable gases. Furthermore, the guide column 6 is provided with a tapered section (the tapered section is conical) at a section inside the swirl hole 301, that is, the inner and outer diameters gradually decrease in the direction away from the bottom plate 1.

[0024] When the fluid containing bubbles flows in through the fluid inlet 8, under the guiding action of the guide plate 7, it enters the primary cyclone area 10 along the tangential direction, and rotates around the guide tube 5 at a relatively high speed. The bubbles in the fluid are deformed and torn into smaller bubbles under the action of the cyclone. When the cyclone is at the upper end of the guide tube 5, it will continue to swirl around the guide column 6 and enter the high-speed cyclone area 9. Since the cross-sectional area of ​​the fluid is greatly reduced, the flow rate is rapidly accelerated, the potential energy is further converted into kinetic energy, the flow rate is accelerated, and the pressure is reduced; under the action of negative pressure, the gas in the guide column 6 enters the high-speed rotating fluid through the air outlet 602 on the guide column 6. Due to the deformation caused by the rotation, the bubbles are torn into very small pieces. When the fluid containing bubbles finally passes through the diffusion zone 4, due to the negative pressure inside the fluid, the bubbles are further broken into small bubbles, and finally ultra-fine bubble water is produced and flows out of the generator. The present invention can meet the requirements of large flow and low head, the flow rate can be unlimited, and the head can have a very good effect when it is above 0.1MPa. At the same time, the present invention has a simple structure and is not easy to be blocked. Therefore, it has broad application prospects in river and lake pollution control, sewage treatment in sewage plants, etc.

[0025] In summary, in the micro-bubble generator provided in an embodiment of the present invention, the micro-bubble generator includes: a base plate, a sleeve, a cover plate, a diffuser, a guide tube, a guide column, a guide plate and a fluid inlet, the base plate and the cover plate are respectively arranged at both ends of the sleeve, the diffuser is arranged on the cover plate away from one end of the sleeve, the cover plate is provided with a swirl hole connecting the inner cavity of the sleeve and the inner cavity of the diffuser, the guide tube is arranged on the base plate, a primary swirl zone is formed between the guide tube and the sleeve, the guide column is arranged in the guide tube and extends into the swirl hole, a high-speed swirl zone is formed between the guide column and the cover plate, the primary swirl zone and the high-speed swirl zone are connected, the fluid inlet is arranged on the side wall of the sleeve and close to the base plate, the guide plate is arranged between the sleeve and the guide tube, so that the fluid passing through the fluid inlet forms a swirl around the guide tube. The micro-bubble generator provided by the present invention can tear bubbles in the fluid and cause cavitation to generate a large number of micro-bubbles even when the water pressure is not high.

[0026] The above is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any technician in the relevant technical field, without departing from the scope of the technical solution of the present invention, makes any form of equivalent replacement or modification to the technical solution and technical content disclosed in the present invention, which does not depart from the content of the technical solution of the present invention and still falls within the protection scope of the present invention.

Claims

1. A micro bubble generator, characterized in that: include: A bottom plate, a sleeve, a cover plate, a diffuser, a guide tube, a guide column, a guide plate and a fluid inlet, wherein the bottom plate and the cover plate are respectively arranged at both ends of the sleeve, the diffuser is arranged on the cover plate at one end away from the sleeve, a swirl hole connecting the inner cavity of the sleeve and the inner cavity of the diffuser is arranged on the cover plate, the guide tube is arranged on the bottom plate, a primary swirl zone is formed between the guide tube and the sleeve, the guide column is arranged in the guide tube and extends into the swirl hole, a high-speed swirl zone is formed between the guide column and the cover plate, The primary swirl zone is connected to the high-speed swirl zone, the fluid inlet is arranged on the side wall of the sleeve and close to the bottom plate, the guide plate is arranged between the sleeve and the guide tube, so that the fluid passing through the fluid inlet forms a swirl around the guide tube; the diameter of the guide column located in the swirl hole gradually decreases in the direction away from the bottom plate; the guide column is provided with an air inlet at one end away from the diffuser, and the guide column is provided with an air outlet at a section inside the swirl hole, and the air outlet connects the air inlet and the high-speed swirl zone; The upper end surface of the guide column close to the diffuser is coplanar with the upper end surface of the cover plate; When the fluid containing bubbles flows in through the fluid inlet, it enters the primary vortex zone along the tangential direction under the guiding action of the guide plate, and rotates around the guide tube. The bubbles in the fluid are deformed and torn under the action of the vortex. When the vortex is at the upper end of the guide tube, it continues to swirl around the guide column and enters the high-speed vortex zone. Since the cross-sectional area of ​​the fluid is reduced, the flow velocity is accelerated, the potential energy is further converted into kinetic energy, the flow velocity is accelerated, and the pressure is reduced; under the action of negative pressure, the gas in the guide column enters the rotating fluid through the air outlet on the guide column, and the bubbles are torn due to the deformation caused by the rotation.

2. The micro-bubble generator according to claim 1, characterized in that: The diffusion port includes a conical inner cavity, and the inner diameter of the diffusion port gradually increases in a direction away from the cover plate.

3. The micro-bubble generator according to claim 2, characterized in that: The cone angle of the inner cavity of the diffusion port is 6-15 degrees.

4. The micro-bubble generator according to claim 1, characterized in that: The guide plate is an arc-shaped plate, and one end of the guide plate is connected to the inner wall of the sleeve.

5. The micro-bubble generator according to claim 1, characterized in that: The guide plate is an arc-shaped plate, and one end of the guide plate is connected to the inner wall of the fluid inlet.

6. The micro-bubble generator according to claim 1, characterized in that: The guide plate is an arc-shaped plate, and the guide plate is connected to the bottom plate at one side close to the bottom plate.

7. The micro-bubble generator according to any one of claims 4 to 6, characterized in that: The height of the arc-shaped plate along the axial direction of the sleeve is greater than or equal to the inner diameter of the fluid inlet.

8. The micro-bubble generator according to claim 1, characterized in that: The height of the guide sleeve along the axial direction of the sleeve is smaller than the height of the sleeve.

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