Jet flow micro-nano bubble generator device

Abstract

The invention discloses a jet flow micro-nano bubble generator device, and relates to the technical field of sewage treatment. An accelerating pipe, a gas-liquid mixing cavity and a bubble releasing cavity which are connected in series are arranged in the device shell, the gas-liquid mixing cavity is provided with a conical pipe with piezoelectric ceramics to realize ultrasonic cavitation crushing, and the bubble releasing cavity is provided with a dual-mode self-cleaning system which comprises a back-flushing water channel with a duckbilled water spraying opening and a memory alloy bubble releasing plate structure. The power generation impeller is adopted to convert fluid kinetic energy into electric energy needed by the cleaning system, and energy consumption self-circulation is achieved. The bubble diameter is smaller through a multi-stage crushing mechanism, and the technical problems that a traditional device is uneven in bubble size and a bubble release plate is prone to being blocked are solved in cooperation with an online cleaning system. The device is especially suitable for continuous operation scenes of high-turbidity sewage treatment, the maintenance period is prolonged, and the energy consumption is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment equipment, in particular to a jet micro-nano bubble generator device. Background Art

[0002] Due to its unique physical and chemical properties, micro-nano bubble technology has been widely used in water treatment, agricultural irrigation, medical cleaning, and other fields. Existing jet-type micro-nano bubble generators (such as CN221580268U) use a Venturi tube structure to create a jet of negative pressure, drawing in gas and achieving gas-liquid mixing without the need for an external air pump. This technology offers the advantages of low energy consumption and a simple structure. However, this technology still has the following significant drawbacks: 1. Limited bubble breaking efficiency: Relying solely on jet shear force and mechanical bubble release plate cutting, it is difficult to stably generate submicron bubbles, and the bubble size distribution is uneven.

[0003] 2. The bubble release plate is easily clogged: After long-term operation, the micropores of the bubble release plate are easily clogged by impurities or biofilms, requiring frequent disassembly and cleaning, resulting in increased downtime.

[0004] 3. Single cleaning method: The existing device only supports manual disassembly and cleaning during shutdown, and cannot achieve online self-cleaning, which affects the efficiency of continuous operation.

[0005] To address these issues, existing technologies attempt to mitigate clogging by optimizing the aperture of bubble release plates or adding filtration devices. However, these efforts still struggle to achieve both efficient bubble breaking and maintenance-free operation. For example, mechanical bubble release plates still face the problem of accumulation of deposits on the pore walls after long-term use, while simply reducing the aperture further exacerbates the risk of clogging. Furthermore, conventional fluidic structures lack the ability to secondary break bubbles, making it difficult to meet the nanoscale bubble requirements of high-precision applications.

[0006] To this end, the present application designs a jet micro-nano bubble generator device that integrates efficient bubble crushing, intelligent self-cleaning and low maintenance cost to solve the above problems. Summary of the Invention

[0007] In order to make up for the deficiencies in the prior art, the present invention provides a jet micro-nano bubble generator device. A jet micro-nano bubble generator device, comprising a device housing, characterized in that: The device shell is a cylindrical structure, which is provided with a connected water inlet, an acceleration tube, a water outlet pipe, a gas-liquid mixing chamber and a bubble release chamber from top to bottom. The water outlet pipe is connected to the external air inlet pipe. A spoiler is provided in the gas-liquid mixing chamber. Several conical tubes are provided between the gas-liquid mixing chamber and the bubble release chamber. A bubble release plate is provided in the bubble release chamber. A self-cleaning device is provided in the device shell, which can clean impurities blocked on the bubble release plate.

[0008] Further, to better implement the present invention, a power generation impeller is provided in the gas-liquid mixing chamber. The rotating shaft of the power generation impeller extends outside the device housing and is connected to a generator. The generator is connected to a battery, and the battery supplies power to all electric components. The generator, the battery, and the control board connected to the battery are all waterproof encapsulated and fixed to the outside of the device housing.

[0009] Further, to better implement the present invention, a ring-shaped piezoelectric ceramic sheet is embedded in the inner wall of the conical tube to secondarily break bubbles through the high-frequency ultrasonic cavitation effect.

[0010] Further, to better implement the present invention, the self-cleaning device includes a backflush water channel provided in the inner wall of the device housing. The backflush water channel communicates with the upper half region of the water outlet pipe, and the backflush water channel forms a ring around the bottommost part of the device housing. A number of duckbill water spray nozzles facing the bubble release plate are opened at the bottom ring of the backflush water channel; the self-cleaning device further includes a shut-off baffle pushed by an external electric cylinder. A water guiding hole is opened on the shut-off baffle. When the shut-off baffle moves to block the water outlet pipe, the water guiding hole of the shut-off baffle communicates with the backflush water channel. In this way, the water flowing in at high speed from the water inlet will flow downward along the backflush water channel and be sprayed out through the duckbill water spray nozzles to wash the impurities in the duckbill water spray nozzles.

[0011] Further, to better implement the present invention, the self-cleaning device further includes a switch window opened on the outer wall of the gas-liquid mixing chamber. An electric telescopic rod is connected to the outside of the switch window. The electric telescopic rod is fixed to the outside of the device housing through an L-shaped mounting bracket. When backwashing is performed, the switch window hole is opened to allow the water carrying the washed-down impurities to be discharged from here.

[0012] Further, to better implement the present invention, when the jet micro-nano bubble generator device does not adopt the self-cleaning device, a bubble release plate made of shape memory alloy is used. The width of the card slot at the installation position of the bubble release plate is greater than the thickness of the bubble release plate. A heating rod is inserted into the bubble release plate. After the heating rod is heated, the bubble release plate deforms and the hole pitch increases, and the impurities attached to it are separated and carried downward by the water flow.

[0013] Further, to better implement the present invention, the axis of the water spray nozzle of the duckbill water spray nozzle forms an angle of 30°-60° with the surface of the bubble release plate.

[0014] Further, to better implement the present invention, the shape memory alloy of the bubble release plate is nickel-titanium alloy, its pore diameter expansion temperature is 50-80°C, the power of the heating rod is 100-300W, and the surface of the heating rod is coated with a corrosion-resistant insulating layer.

[0015] The beneficial effects of the present invention are: Multi-stage bubble fragmentation system: Through the triple action of accelerating tube jet shear, tapered tube cavitation, and mechanical cutting of the bubble release plate, bubble diameter is significantly reduced. Compared with traditional single-stage fragmentation structures, the bubble specific surface area is greatly increased, significantly improving dissolved oxygen transfer efficiency.

[0016] Intelligent self-cleaning system: Backwash mode: The duckbill water nozzle is designed with a 30°-60° angle to produce a swirling flushing effect.

[0017] Memory alloy mode: The pore size of the nickel-titanium alloy bubble release plate expands during thermal deformation, allowing attached impurities to be peeled off, enabling zero-downtime cleaning.

[0018] The power generation impeller can meet the intermittent power supply needs of piezoelectric ceramics and heating rods, achieving energy self-sufficiency of key components. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic cross-sectional view of the three-dimensional structure of the present invention; Figure 2 This is the second schematic cross-sectional view of the three-dimensional structure of the present invention; Figure 3 This is the third schematic cutaway diagram of the three-dimensional structure of the present invention.

[0020] In the figure, 1. Device housing, 2. Water inlet, 3. Accelerator tube, 4. Water outlet pipe, 5. Air inlet pipe, 6. Gas-liquid mixing chamber, 7. Spoiler, 8. Conical tube, 9. Bubble release chamber, 10. Bubble release plate, 11. Power generation impeller, 12. Self-cleaning device, 13. Backwash water channel, 14. Duckbill water nozzle, 15. Intercept baffle, 16. Water guide hole, 17. Switch window, 18. Electric telescopic rod, 19. Mounting bracket, 20. Card slot. DETAILED DESCRIPTION

[0021] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in a variety of different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0023] Figures 1-3This is a specific embodiment of the present invention, which is a jet micro-nano bubble generator device. The specific working process of this embodiment is as follows: Standard working mode: When the device is connected to the water supply pipeline, high-speed water flows through the water inlet 2 into the acceleration pipe 3 to form a Venturi effect, and air is inhaled through the air inlet pipe 5 on the side of the water outlet pipe 4. The gas-liquid mixture forms turbulence in the gas-liquid mixing chamber 6 through the spoiler plate 7, and then is squeezed by the tapered structure when entering the tapered pipe 8. At this time, the piezoelectric ceramic sheet on the inner wall of the tapered pipe works, generating an ultrasonic cavitation effect to break the bubbles for the second time. Finally, the mixed liquid forms a uniform nano-bubble group through the bubble release plate 10 in the bubble release chamber 9, and the power generation impeller 11 continuously converts the kinetic energy of water flow into electric energy for storage.

[0024] Backwashing mode: Start backwashing regularly. The electric cylinder pushes the intercepting baffle 15 to completely close the water outlet pipe 4. At this time, the water guide hole 16 is aligned with the inlet of the backwash water channel 13; high-speed water flows through the backwash water channel 13 and sprays out from the duckbill water spray port 14 to form a fan-shaped water curtain to wash the surface of the bubble release plate 10; synchronously control the electric telescopic rod 18 to open the switch window 17; the flushing wastewater is discharged from the window, and after 20 seconds, it returns to the normal operation.

[0025] In a simplified model without a self-cleaning device, the control board starts the heating rod to continuously heat the nickel-titanium alloy bubble release plate; when the temperature rises to 60 °C, the bubble release plate undergoes a martensitic transformation and the pore diameter expands; after maintaining the high temperature state for 180 seconds, the heating is turned off, and the bubble release plate cools down to restore the original pore diameter; the device keeps running during the heating process, and the peeled impurities are discharged during the normal bubble generation process.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A jet micro-nano bubble generator device, including a device housing (1), characterized in that: The device housing (1) is a cylindrical structure, and is successively provided with a communicating water inlet (2), an acceleration tube (3), a water outlet pipe (4), a gas-liquid mixing chamber (6) and a bubble release chamber (9) from top to bottom. The water outlet pipe (4) communicates with an external air inlet pipe (5). A spoiler plate (7) is arranged in the gas-liquid mixing chamber (6). A number of conical tubes (8) are arranged between the gas-liquid mixing chamber (6) and the bubble release chamber (9). A bubble release plate (10) is arranged in the bubble release chamber (9); A self-cleaning device (12) is arranged in the device housing (1), and the self-cleaning device (12) can clean the impurities blocked on the bubble release plate (10).

2. The jet micro-nano bubble generator device according to claim 1, characterized in that: A power generation impeller (11) is arranged in the gas-liquid mixing chamber (6). The rotating shaft of the power generation impeller (11) extends outside the device housing (1) and is connected to a generator. The generator is connected to a battery, and the battery supplies power to all electric components. The generator, the battery and the control board connected to the battery are all waterproof and encapsulated and fixed to the outside of the device housing (1).

3. The jet micro-nano bubble generator device according to claim 1, characterized in that: An annular piezoelectric ceramic sheet is embedded in the inner wall of the conical tube (8), and the bubbles are broken again through the high-frequency ultrasonic cavitation effect.

4. The jet micro-nano bubble generator device according to claim 1, characterized in that: The self-cleaning device (12) includes a backflush water channel (13) arranged in the inner wall of the device housing (1). The backflush water channel (13) communicates with the upper half area of the water outlet pipe (4), and the backflush water channel (13) forms a ring around the bottom of the device housing (1). A number of duckbill water spray nozzles (14) facing the bubble release plate (10) are opened at the bottom ring of the backflush water channel (13); The self-cleaning device (12) further includes a shut-off baffle (15) pushed by an external electric cylinder. A water guide hole (16) is opened on the shut-off baffle (15). When the shut-off baffle (15) moves to block the water outlet pipe (4), the water guide hole (16) of the shut-off baffle (15) communicates with the backflush water channel (13). In this way, the water flowing in at an accelerated speed from the water inlet (2) will flow down along the backflush water channel (13) and be sprayed out through the duckbill water spray nozzles (14) to wash the impurities in the duckbill water spray nozzles (14).

5. The jet micro-nano bubble generator device according to claim 4, characterized in that: The self-cleaning device (12) further includes a switch window (17) opened on the outer wall of the gas-liquid mixing chamber (6). An electric telescopic rod (18) is connected to the outside of the switch window (17). The electric telescopic rod (18) is fixed to the outside of the device housing (1) through an L-shaped mounting bracket (19). When backwashing, the switch window hole (17) is opened to discharge the water carrying the washed-down impurities from here.

6. The jet micro-nano bubble generator device according to claim 1, characterized in that: When the jet micro-nano bubble generator device does not adopt the self-cleaning device (12), the bubble release plate (10) made of shape memory alloy is used. The width of the card slot (20) at the installation position of the bubble release plate (10) is greater than the thickness of the bubble release plate (10). A heating rod is inserted into the interior of the bubble release plate (10). After the heating rod is heated, the bubble release plate (10) deforms and the pore distance increases, and the impurities attached to it are detached and carried out downward by the water flow.

7. The jet micro-nano bubble generator device according to claim 4, wherein: The axis of the water spray port of the duckbill water spray port (14) forms an angle of 30°-60° with the surface of the bubble release plate (10).

8. The jet micro-nano bubble generator device according to claim 6, wherein: The shape memory alloy of the bubble release plate (10) is nitinol alloy, its pore diameter expansion temperature is 50-80 °C, the power of the heating rod is 100-300 W, and the surface of the heating rod is coated with a corrosion-resistant insulating layer.

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