A multi-stage, multi-angle, rapid diffusion oxygen-dissolving three-dimensional non-clogging microbubble aerator

Abstract

This invention provides a multi-stage, multi-angle, rapid diffusion oxygen dissolving three-dimensional non-clogging microbubble aerator. An air inlet pipe and an air pipe are sequentially connected along the air inlet direction. A rapid microbubble cutting and diffusion oxygen dissolving unit is fitted outside the air inlet pipe. An inner cylinder and an outer cylinder are sequentially fitted outside the air pipe from the inside to the outside. The inner cylinder has a first inner cylinder section, a second inner cylinder section, and a third inner cylinder section sequentially along the air inlet direction. A medium-sized bubble cutting and diffusion oxygen dissolving unit is installed on the outer wall of the first inner cylinder section, a large bubble cutting and diffusion oxygen dissolving unit is installed on the outer wall of the second inner cylinder section, and an air guiding unit is installed on the outer wall of the third inner cylinder section. An air diffuser unit is installed at the air outlet of the air pipe. This multi-stage, multi-angle, rapid diffusion oxygen dissolving three-dimensional non-clogging microbubble aerator effectively cuts air into microbubbles, effectively solving the problems of clogging and short lifespan of traditional aerators after long-term use, and is suitable for aerobic aeration treatment.

Description

Technical Field

[0001] This utility model belongs to the technical field of sewage treatment and relates to a multi-stage, multi-angle, rapid diffusion oxygen dissolving three-dimensional non-clogging microbubble aerator. Background Technology

[0002] Wastewater biological treatment involves microorganisms, catalyzed by enzymes, using their metabolic functions to decompose and transform pollutants in wastewater. This includes anaerobic and aerobic biological treatment. Anaerobic biological treatment, under anaerobic conditions, utilizes the biodegradation of anaerobic or facultative anaerobic microorganisms to convert complex organic molecules in wastewater into smaller molecules such as acids, methane, or carbon dioxide, thereby degrading pollutants or improving the biodegradability of the wastewater. Anaerobic biological treatment has advantages such as low energy consumption, high load, and low nitrogen and phosphorus nutrient requirements; however, the effluent pollutant concentration is still relatively high, often insufficient to meet wastewater treatment needs, necessitating subsequent aerobic biological treatment. Aerobic biological treatment, in the presence of molecular oxygen, utilizes aerobic microorganisms to degrade organic matter in wastewater, thereby reducing pollutants. Aerobic biological treatment has a fast reaction rate and low effluent pollutant concentration, primarily suitable for treating low to medium concentration organic wastewater. With increasingly stringent environmental requirements, aerobic biological treatment is essentially an indispensable process in wastewater treatment. The aeration system is a major energy-consuming unit in the wastewater treatment process, typically accounting for 50% to 60% of the total energy consumption of a wastewater treatment plant. As an essential supporting facility for the aeration system in aerobic wastewater treatment, the aerator directly affects the aerobic treatment effect, project investment, operating costs, and operation and management.

[0003] Currently, commonly used aerators for aerobic wastewater treatment include microporous aerators, jet aerators, and cyclone aerators. Microporous aerators work by compressing air and causing it to overflow from the micropores of a rubber diaphragm, forming tiny bubbles that diffuse into the water. They have a large gas-liquid contact area and high oxygen utilization rate, but they also have a large pressure loss and are prone to clogging. As the aerator operates for longer periods, the micropores of the microporous aerator gradually become clogged, reducing the aerator's power efficiency. Therefore, they are not suitable for aerobic biological treatment of wastewater with high sludge concentrations or that is prone to scaling.

[0004] Jet aerators use high-speed jets of circulating water to draw in air, mix it within the chamber, and then spray it out through nozzles. They serve a large area and are less prone to clogging, but require additional power equipment and consume a lot of energy.

[0005] Cyclone aerators use airflow to mix wastewater with the gas inside the cylinder, breaking it into tiny bubbles as it rotates and rises. Simultaneously, a negative pressure is created at the bottom of the cylinder to entrain sludge from the bottom of the tank. This design prevents clogging, allows for installation without interrupting production, and has moderate energy consumption, leading to its increasingly widespread application. However, most current cyclone aerators use a design where the air inlet pipe is located on the side of the cylinder and connected to the cylinder via a bend, leaving the cylinder suspended. This causes vibration during air intake, and the connection between the air pipe and the cylinder is prone to fatigue and breakage after prolonged use, damaging the aerator. Furthermore, current cyclone aerators have complex cylinder structures, are difficult to manufacture, and are costly, resulting in large bubble diameters and low oxygen utilization.

[0006] Chinese invention patent (ZL2019103923783) describes "a Tai Chi-style dual-nozzle vortex aeration device". This vortex aeration device uses spaced-apart mushroom-shaped cutting components of different sizes to cut the bubbles generated by the Tai Chi-style dual nozzles from bottom to top. The cutting effect is severely limited by the air intake of the aeration device, making it difficult to flexibly adapt to changes in wastewater quality. The combination of spaced-apart mushroom-shaped cutting components of different sizes easily causes the small bubbles after cutting to re-coalesce into large bubbles, resulting in large bubble diameters and low oxygen utilization.

[0007] Chinese invention patent (CN111170480A) describes a "cyclone aerator and a cyclone aeration device having the same". This aerator uses a central air inlet pipe for air intake and a base that contacts the bottom of the pool to avoid the problems of suspension and easy damage to the connecting parts caused by side air intake. However, it forms air bubbles by cutting the impeller rotation through water impact. The size of the air bubbles is controlled by the water force. Its aeration performance is limited by the air supply, the aeration effect of the aerator is unstable and its applicability is poor. Its internal structure is complex and easily damaged. Its base needs to be placed flat on the bottom of the pool, which requires high precision in the construction of the pool bottom. Utility Model Content

[0008] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a multi-stage, multi-angle, rapid diffusion oxygen dissolving three-dimensional non-clogging microbubble aerator, which has a simple structure, small bubble diameter, high oxygen utilization rate, stable aerator effect, and long service life. It is suitable for aerobic biological treatment of various wastewaters, especially aerobic treatment of wastewater prone to scaling or high sludge concentration biochemical systems.

[0009] To achieve the above and other related objectives, this utility model provides a multi-stage, multi-angle, rapid diffusion oxygen dissolving three-dimensional non-clogging microbubble aerator. An air inlet pipe and an air pipe are sequentially connected along the air inlet direction. A rapid microbubble cutting and diffusion oxygen dissolving unit is sleeved outside the air inlet pipe. An inner cylinder and an outer cylinder are sequentially sleeved outside the air pipe from the inside to the outside. The inner and outer cylinders are hollow and spaced apart. The inner cylinder has a first inner cylinder section, a second inner cylinder section, and a third inner cylinder section sequentially along the air inlet direction. A medium-sized bubble cutting and diffusion oxygen dissolving unit is provided on the outer wall of the first inner cylinder section. A large bubble cutting and diffusion oxygen dissolving unit is provided on the outer wall of the second inner cylinder section. An air guiding unit is provided on the outer wall of the third inner cylinder section. An air diffuser unit is provided at the air outlet of the air pipe.

[0010] As described above, the multi-stage, multi-angle, rapid diffusion oxygen-dissolving three-dimensional non-clogging microbubble aerator provided by this utility model has the following beneficial effects:

[0011] (1) The present invention provides a multi-stage, multi-angle, rapid diffusion oxygenation type three-dimensional non-clogging microbubble aerator. Air passes through the air dispersion unit, air guiding unit, large bubble cutting diffusion oxygenation unit, medium bubble cutting diffusion oxygenation unit and rapid microbubble cutting diffusion oxygenation unit in sequence. It is cut into microbubbles step by step and diffuses and dissolves in the sewage evenly and rapidly. It integrates vertical and coupled tangential upward cutting, diffusion and oxygenation functions into one, with small bubble diameter and high oxygen utilization rate.

[0012] (2) The present invention provides a multi-stage, multi-angle, rapid diffusion oxygenation type three-dimensional non-clogging microbubble aerator. The microbubbles are dispersed into the water from different positions and through more paths by the lotus disc-shaped cutting, diffusion and oxygenation disc. The aeration is uniform, the service area is large and the oxygen mass transfer efficiency is high.

[0013] (3) The present invention provides a multi-stage, multi-angle, rapid diffusion oxygen dissolving three-dimensional non-clogging microbubble aerator, which can extract sludge from the bottom of the aerator through the principle of air lifting and achieve efficient mixing of sludge, water and air, improve oxygen utilization and eliminate the risk of sludge accumulation at the bottom of the aerator.

[0014] (4) The multi-stage, multi-angle, rapid diffusion oxygen dissolving three-dimensional non-clogging microbubble aerator provided by this utility model is made of plastic as a whole and is formed by one-piece casting and threaded connection. It has no easily damaged parts, has a long service life, and can be used in aerobic aeration treatment of various types of wastewater with a wide range of applications.

[0015] (5) The multi-stage, multi-angle, rapid diffusion oxygen dissolving three-dimensional non-clogging microbubble aerator provided by this utility model can contact the bottom of the aeration tank through adjustable legs, which has low requirements for the flatness of the aeration tank bottom and the installation accuracy of the aeration pipe. Compared with the suspended type liftable aerator, it is more stable during operation and convenient for construction and operation management.

[0016] (6) The present invention provides a multi-stage, multi-angle, rapid diffusion oxygen dissolving three-dimensional non-clogging microbubble aerator, which can make the aerators in the entire aeration tank at the same height through adjustable legs, so that the aeration is uniform and the aeration efficiency is high.

[0017] (7) The present invention provides a multi-stage, multi-angle, rapid diffusion oxygen dissolving three-dimensional non-clogging microbubble aerator, which generates microbubbles through multi-stage cutting and diffusion, with low requirements for the air intake of the aerator and stable aeration effect.

[0018] (8) The present invention provides a multi-stage, multi-angle, rapid diffusion oxygen dissolving three-dimensional non-clogging microbubble aerator, which generates microbubbles through multi-stage cutting and diffusion, and has higher power efficiency than membrane microporous aerator.

[0019] (9) The present invention provides a multi-stage, multi-angle, rapid diffusion oxygenation type three-dimensional non-clogging microbubble aerator, which generates microbubbles through multi-stage cutting and diffusion, does not clog, has low requirements for influent water quality, and is especially suitable for aerobic aeration treatment of easily scaled sewage or high sludge concentration biochemical systems. Attached Figure Description

[0020] Figure 1 The diagram shown is a schematic representation of the overall structure of a multi-stage, multi-angle, rapid diffusion oxygen-dissolving three-dimensional non-clogging microbubble aerator according to this invention.

[0021] Figure 2 The diagram shown is a structural schematic of the ultra-fast microbubble cutting diffusion oxygen dissolving unit in this invention.

[0022] Figure 3 The diagram shown is a structural schematic of the inner cylinder in this utility model.

[0023] Figure 4 The diagram shown is a structural schematic of the bubble cutting and diffusion oxygen dissolving unit in this invention.

[0024] Figure 5 The diagram shown is a structural schematic of the large bubble cutting and diffusion dissolved oxygen unit in this invention.

[0025] Figure 6 The diagram shown is a structural schematic of the air guiding unit in this invention.

[0026] Figure 7The diagram shows the structure of the connecting component that connects the inner cylinder and the outer cylinder in this utility model.

[0027] Figure Labels

[0028] 1. Intake pipe

[0029] 112 Flange

[0030] 2. High-speed microbubble cutting diffusion dissolved oxygen unit

[0031] 21 Disk Body

[0032] 22 microbubble cutting teeth

[0033] 23. Protrusion

[0034] 24. Concave portion

[0035] 3. Bubble-cutting diffusion dissolved oxygen unit

[0036] 31 Bubble Cutting Teeth

[0037] 32-bubble cutting tooth layer

[0038] 4 large bubble cutting diffusion dissolved oxygen units

[0039] 41 Large bubble cutting teeth

[0040] 42 Large bubble cutting tooth layers

[0041] 5. Air deflectors

[0042] 6 inner cylinder

[0043] 611 First Inner Cylinder Section

[0044] 612 Second Inner Cylinder Section

[0045] 613 Third Inner Cylinder Section

[0046] 62 Air pipe

[0047] 7 outer cylinder

[0048] 8 bases

[0049] 9. Air diffuser

[0050] 91 Fixed rod

[0051] 10 Adjustable outriggers

[0052] 11 Connectors

[0053] 111 Connecting rod

[0054] h1 Spacing between adjacent microbubble cutting teeth

[0055] h2 Height of the disk Detailed Implementation

[0056] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0057] Please see Figures 1 to 7 It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0058] This utility model provides a multi-stage, multi-angle, rapid diffusion oxygen-dissolving three-dimensional non-clogging microbubble aerator, such as... Figure 1-7 As shown, an air inlet pipe 1 and an air pipe 62 are connected in sequence along the air intake direction. A high-speed microbubble cutting and diffusion oxygen dissolving unit 2 is sleeved on the outside of the air inlet pipe 1. An inner cylinder 6 and an outer cylinder 7 are sleeved on the outside of the air pipe 62 from the inside to the outside. The inner cylinder 6 and the outer cylinder 7 are hollow and spaced apart. The inner cylinder 6 has a first inner cylinder section 611, a second inner cylinder section 612 and a third inner cylinder section 613 in sequence along the air intake direction. A medium bubble cutting and diffusion oxygen dissolving unit 3 is provided on the outer wall of the first inner cylinder section 611. A large bubble cutting and diffusion oxygen dissolving unit 4 is provided on the outer wall of the second inner cylinder section 612. An air guiding unit is provided on the outer wall of the third inner cylinder section 613. An air diffuser unit is provided at the air outlet of the air pipe 62.

[0059] In the aforementioned aerators, such as Figure 1 As shown, a flange 112 is connected to the air intake pipe 1.

[0060] In one implementation, such as Figure 1 As shown, the flange 112 is located at the air inlet end of the air inlet pipe 1.

[0061] In the above-mentioned aerator, the outer diameter of the air inlet pipe 1 is 30-45mm, specifically such as De32 or De40.

[0062] In the aforementioned aerators, such as Figure 1 As shown, the intake pipe 1 and the air pipe 62 are connected by a detachable threaded connection.

[0063] That is, a threaded interface is provided on the outer or inner wall of the air outlet end of the air inlet pipe 1, and a detachable connection is achieved between it and the corresponding threaded interface provided on the inner or outer wall of the air inlet end of the air pipe 62.

[0064] In the aforementioned aerators, such as Figure 1 As shown, the ultra-fast microbubble cutting diffusion oxygen dissolving unit 2 includes a disc body 21. The cross-section of the disc body 21 gradually decreases from top to bottom along the air intake direction. Multiple microbubble cutting teeth 22 are provided on the outer surface of the disc body 21.

[0065] The ultra-fast microbubble cutting, diffusion, and oxygen dissolving unit 2 cuts medium-sized air bubbles into microbubbles through densely interlaced and variable-section truncated quadrangular microbubble cutting teeth 22, while avoiding the aggregation of microbubbles. This allows air to exist in the form of microbubbles, and the lotus-shaped cutting, diffusion, and oxygen dissolving disc 21 causes the microbubbles to escape from different positions along the oblique upward direction into the aerobic reaction tank.

[0066] In one implementation, such as Figure 1 As shown, the disc body 21 is integrally cast and connected to the air inlet pipe 1.

[0067] In one implementation, such as Figure 1 As shown, the disc body 21 is located between the air inlet end and the air outlet end of the air inlet pipe 1. That is, it is located between the flange 112 at the air inlet end of the air inlet pipe 1 and the threaded interface at the air outlet end of the air inlet pipe 1.

[0068] In one implementation, such as Figure 1 As shown, the height h2 of the disk body 21 is 80-120mm.

[0069] In one implementation, such as Figure 2 As shown, the cross-sectional shape of the disc body 21 is lotus-shaped, and the outer surface of the disc body 21 is alternately provided with protrusions 23 and concave portions 24.

[0070] The protrusion 23 is the area that protrudes outward along the horizontal direction on the outer surface of the disc 21, and the concave portion 24 is the area that concave inward along the horizontal direction on the outer surface of the disc 21. The protrusion 23 and the concave portion 24 allow bubbles to escape into the water from different positions and through more paths, resulting in more uniform aeration and higher oxygen mass transfer efficiency.

[0071] The alternation of the protrusions 23 and the concave portions 24 means that adjacent protrusions 23 are spaced apart and connected by the concave portions 24; similarly, adjacent concave portions 24 are spaced apart and connected by the protrusions 23.

[0072] In a preferred embodiment, such as Figure 2 As shown, the cross-sectional shape of the protrusion 23 is semi-circular, and the radius of the cross-section of the protrusion 23 is 20-30mm; the cross-sectional shape of the concave portion 24 is semi-circular, and the radius of the cross-section of the concave portion 24 is 20-30mm.

[0073] In a preferred embodiment, the number of protrusions 23 and concave portions 24 are the same.

[0074] In a further preferred embodiment, the number of protrusions 23 is 6 or 8; the number of recesses 24 is 6 or 8.

[0075] In a preferred embodiment, such as Figure 1 As shown, the horizontal distance between the outer edges of the opposing protrusions 23 on the top surface of the disc 21 is 285-450 mm, preferably 450 mm.

[0076] In one implementation, such as Figure 1-2 As shown, the microbubble cutting teeth 22 are evenly distributed on the outer surface of the disk body 21, and the spacing h1 between adjacent microbubble cutting teeth 22 is equal.

[0077] In a preferred embodiment, such as Figure 2 As shown, the interval h1 between adjacent microbubble cutting teeth 22 is 10-20 mm.

[0078] In one implementation, such as Figure 1 As shown, the microbubble cutting teeth 22 are vertically downward-facing quadrangular frustums, and the cross-section of the microbubble cutting teeth 22 gradually decreases from top to bottom.

[0079] In a preferred embodiment, the height of the microbubble cutting teeth 22 is 30-50 mm; the side length of the quadrilateral top surface of the microbubble cutting teeth 22 connected to the disk body 21 is 4-8 mm; and the side length of the quadrilateral bottom surface of the microbubble cutting teeth 22 is 1-2 mm.

[0080] In one implementation, such as Figure 1 As shown, the bottom surface of the microbubble cutting tooth 22, which is closest to the air tube 62, is close to the top surface of the inner cylinder 6.

[0081] In the aforementioned aerators, such as Figure 1 , 3 As shown in Figure 7, the air pipe 62 is located at the center of the inner cylinder 6 and the upper and lower ends of the air pipe 62 are flush with the inner sidewall of the inner cylinder 6.

[0082] In one embodiment, the outer diameter of the air pipe 62 is the same as the inner diameter of the inner cylinder 6.

[0083] In the aforementioned aerators, such as Figure 1 , 3 As shown in Figure 7, the outer diameter of the inner cylinder 6 is 100-150 mm, preferably 120 mm.

[0084] In the aforementioned aerators, such as Figure 1 , 4 As shown, the medium-bubble cutting and diffusion oxygen dissolving unit 3 includes several medium-bubble cutting tooth layers 32, each containing multiple medium-bubble cutting teeth 31. The medium-bubble cutting teeth 31 in the same layer 32 are arranged radially at intervals along the inner cylinder 6, while the medium-bubble cutting teeth 31 in adjacent layers 32 are arranged alternately. Large bubbles are cut into medium-sized bubbles by the medium-bubble cutting teeth 31.

[0085] The medium-bubble cutting and diffusion dissolved oxygen unit 3 gradually cuts large bubbles into medium bubbles through V-shaped or frustum-shaped medium-bubble cutting teeth 31 that are progressively denser from bottom to top, and avoids the aggregation of medium bubbles. At the same time, it further cuts large bubbles by intensifying the turbulent effect of gas, liquid and solid, so that they are evenly diffused in the sewage and the dissolved oxygen in the sewage is increased.

[0086] In one implementation, such as Figure 1 As shown, the number of layers in the bubble cutting tooth layer 32 is 3 to 4.

[0087] In one implementation, such as Figure 1 As shown, the spacing between adjacent bubble-cutting tooth layers 32 is equal.

[0088] In a preferred embodiment, the spacing between adjacent bubble-cutting tooth layers 32 is 10 to 30 mm.

[0089] In one implementation, such as Figure 1 As shown, the spacing between the medium bubble cutting teeth 31 in the same layer of medium bubble cutting tooth 32 is equal.

[0090] In a preferred embodiment, the spacing between the medium bubble cutting teeth 31 in the same layer of medium bubble cutting tooth 32 is 9 to 16 mm.

[0091] In one embodiment, the number of medium bubble cutting teeth 31 in the same layer of medium bubble cutting tooth 32 is 14 to 18.

[0092] In one implementation, such as Figure 1As shown, in the direction from top to bottom, the number of medium bubble cutting teeth 31 in the upper medium bubble cutting tooth layer 32 is greater than or equal to the number of medium bubble cutting teeth 31 in the lower medium bubble cutting tooth layer 32.

[0093] In one embodiment, the bubble-cutting teeth 31 are V-shaped or frustum-shaped, and the cross-section of the bubble-cutting teeth 31 gradually decreases from top to bottom along the axial direction of the inner cylinder 6.

[0094] In a preferred embodiment, the height of the bubble cutting tooth 31 in the vertical direction is 10-30 mm; the length of the top of the bubble cutting tooth 31 in the radial direction along the inner cylinder 6 is 50-80 mm.

[0095] In the aforementioned aerators, such as Figure 1 , 5 As shown, the large bubble cutting diffusion dissolved oxygen unit 4 includes several large bubble cutting tooth layers 42, each containing multiple large bubble cutting teeth 41. The large bubble cutting teeth 41 in the same layer 42 are arranged radially at intervals along the inner cylinder 6, while the large bubble cutting teeth 41 in adjacent layers 42 are arranged alternately. The large bubble cutting teeth 41 cut the air into large bubbles.

[0096] The large bubble cutting and diffusion oxygenation unit 4 gradually cuts air into large bubbles through V-shaped or frustum-shaped cutting teeth 41 that are progressively denser from bottom to top. The cutting teeth also enhance the turbulent effect of gas, liquid and solid flow, further cutting laminar air into large bubbles and evenly diffusing them into the wastewater, thereby increasing the dissolved oxygen in the wastewater.

[0097] In one implementation, such as Figure 1 As shown, the number of layers in the large bubble cutting tooth layer 42 is 3 to 4.

[0098] In one implementation, such as Figure 1 As shown, the spacing between adjacent large bubble cutting tooth layers 42 is equal.

[0099] In a preferred embodiment, the spacing between adjacent large bubble cutting tooth layers 42 is 15 to 45 mm.

[0100] In one implementation, such as Figure 1 As shown, the spacing between the large bubble cutting teeth 41 in the same layer of large bubble cutting tooth 42 is equal.

[0101] In a preferred embodiment, the spacing between the large bubble cutting teeth 41 in the same layer of large bubble cutting teeth 42 is 10 to 30 mm.

[0102] In one embodiment, the number of large bubble cutting teeth 41 in the same layer of large bubble cutting teeth 42 is 8 to 13.

[0103] In one implementation, such as Figure 1 As shown, along the top-to-bottom direction, the number of large bubble cutting teeth 41 in the upper layer of the large bubble cutting tooth layer 42 is greater than or equal to the number of large bubble cutting teeth 41 in the lower layer of the large bubble cutting tooth layer 42.

[0104] In one embodiment, the large bubble cutting tooth 41 is V-shaped or frustum-shaped, and the cross-section of the large bubble cutting tooth 41 gradually decreases from top to bottom along the axial direction of the inner cylinder 6.

[0105] In a preferred embodiment, the height of the large bubble cutting tooth 41 in the vertical direction is 10-30 mm; the length of the top of the large bubble cutting tooth 41 in the radial direction along the inner cylinder 6 is 50-80 mm.

[0106] In the aforementioned aerators, such as Figure 1 , 6 As shown, the air guiding unit includes an air guiding strip 5, which is spirally arranged around the outer wall of the inner cylinder 6, causing air to spiral upwards along the outer wall of the inner cylinder 6.

[0107] The air guiding unit, by setting a spiral air guiding strip 5, causes the air and mud-water mixture to rise in a spiral state, which intensifies the turbulence and promotes the mixing of the air and mud-water mixture.

[0108] In one implementation, such as Figure 1 As shown, the lower end of the air guide strip 5 is flush with the lower end of the outer wall of the inner cylinder 6, and the upper end of the air guide strip 5 is flush with the upper end of the outer wall of the third inner cylinder section 613.

[0109] In the aforementioned aerators, such as Figure 1 As shown, the height of the third inner cylinder section 613 is 1 / 6 to 1 / 2 of the height of the second inner cylinder section 612.

[0110] In one implementation, such as Figure 1 , 3 As shown in Figure 6, the outer edges of the medium bubble cutting teeth 31, the large bubble cutting teeth 41, and the air guide strip 5 are flush. The outer edge of the medium bubble cutting teeth 31, the large bubble cutting teeth 41, and the air guide strip 5 refers to the side of the medium bubble cutting teeth 31, the large bubble cutting teeth 41, and the air guide strip 5 that is horizontally away from the outer side wall of the inner cylinder 6.

[0111] In a preferred embodiment, the horizontal distance between the outer edge of the medium bubble cutting tooth 31, the large bubble cutting tooth 41, and the air guide strip 5 and the inner wall of the outer cylinder 6 is 30-50 mm.

[0112] In the aforementioned aerators, such as Figure 1 , 7 As shown, the inner cylinder 6 and the outer cylinder 7 are connected by a connector 11. The connector 11 includes several connecting rods 111, with each end of the connecting rod 111 connected to the inner cylinder 6 and the outer cylinder 7 respectively. This connects the inner cylinder 6 and the outer cylinder 7 into a single unit.

[0113] In one implementation, such as Figure 1 , 7 As shown, the two ends of the connecting rod 111 are respectively connected to the top of the outer side wall of the inner cylinder 6 and the top of the inner side wall of the outer cylinder 7.

[0114] In one embodiment, one end of the connecting rod 111 is detachably connected to the inner cylinder 6, and the other end of the connecting rod 111 is integrally cast to the outer cylinder 7. The detachable connection is a detachable threaded connection.

[0115] In one embodiment, the number of connecting rods 111 is 4 to 6.

[0116] In one embodiment, adjacent connecting rods 111 are kept at a phase interval.

[0117] In a preferred embodiment, the spacing between adjacent connecting rods 111 is equal.

[0118] In the aforementioned aerators, such as Figure 1 As shown, the air diffuser unit includes an air diffuser 9, which is conical in shape and has a gradually increasing cross-section from top to bottom. The top of the air diffuser 9 is flush with the air outlet of the air pipe 62. This causes the air flowing vertically downwards along the air pipe 62 inside the aerator to change its direction and diffuse upwards in a conical shape.

[0119] The air diffuser unit changes the airflow direction through the air diffuser 9 and makes the air evenly distributed between the inner cylinder 6 and the outer cylinder 7. It also draws in the mud-water mixture through the air lifting action, so that the gas, liquid and solid are fully mixed between the inner cylinder 6 and the outer cylinder 7.

[0120] In one implementation, such as Figure 1 As shown, the air diffuser 9 is hollow.

[0121] In one implementation, such as Figure 1 As shown, the bottom diameter of the air diffuser 9 is 1 / 3 to 1 / 2 of the inner diameter of the outer cylinder 7.

[0122] In one implementation, such as Figure 1 As shown, the height of the air diffuser 9 is 30-50 mm.

[0123] In one implementation, such as Figure 1 As shown, the bottom of the air diffuser 9 is connected to an adjustable support leg 10.

[0124] In a preferred embodiment, the adjustable support leg 10 is integrally cast and connected to the bottom of the air diffuser 9.

[0125] In a preferred embodiment, the adjustable support leg 10 is an adjustable screw, and the adjustable height of the adjustable screw is 50-100mm. This ensures that the multi-stage, multi-angle, rapid diffusion oxygen-dissolving three-dimensional non-clogging microbubble aerators in the entire aeration tank are at the same height, ensuring uniform aeration. At the same time, it further fixes the air diffuser unit and ensures that the multi-stage, multi-angle, rapid diffusion oxygen-dissolving three-dimensional non-clogging microbubble aerators are stably installed in the aeration tank.

[0126] In the aforementioned aerators, such as Figure 1 As shown, the inner diameter of the outer cylinder 7 is 180-280 mm.

[0127] In the aforementioned aerators, such as Figure 1 As shown, the bottom of the outer cylinder 7 is provided with a base 8, which is connected to the bottom of the outer cylinder 7. The base 8 is also connected to the air diffuser unit via a fixing rod 91.

[0128] In one embodiment, the base 8 is detachably connected to the bottom of the outer cylinder 7. The detachable connection is a detachable threaded connection.

[0129] In one implementation, such as Figure 1 As shown, one end of the fixing rod 91 is connected to the inner wall of the base 8, and the other end of the fixing rod 91 is connected to the outer surface of the air diffuser 9 of the air diffuser unit.

[0130] In one implementation, such as Figure 1 As shown, the number of fixing rods 91 is 4 to 6.

[0131] In this utility model, the inner diameter refers to the internal diameter.

[0132] In the above-mentioned aerator, all components of the multi-stage, multi-angle, rapid diffusion dissolved oxygen type three-dimensional non-clogging microbubble aerator are made of plastic, preferably ABS plastic or nylon plastic.

[0133] The following is combined Figure 1-7 This describes the specific usage process of a multi-stage, multi-angle, rapid diffusion oxygen-dissolving three-dimensional non-clogging microbubble aerator of this utility model.

[0134] Operator obtains such Figure 1-7 The multi-stage, multi-angle, rapid diffusion oxygenation type three-dimensional non-clogging microbubble aerator shown can be used for aerobic treatment of coal gasification wastewater. The wastewater quality is as follows: total hardness 1500 mg / L, COD 800 mg / L, ammonia nitrogen 180 mg / L, and total nitrogen 200 mg / L. The aerator is made of ABS plastic. One end of the air inlet pipe 1 is connected to the air pipe 62, and the other end is connected to the air input pipe through flange 112. The diameter of the air inlet pipe 1 is De32.

[0135] The horizontal distance between the outer edges of the opposing protrusions 23 on the top surface of the disk 21 of the high-speed microbubble cutting diffusion oxygen dissolving unit 2 is 450 mm, and the height h2 of the disk 21 is 100 mm. There are 8 protrusions 23 and 8 concave portions 24. The radius of the cross-section of each protrusion 23 and concave portion 24 is 25 mm. The spacing h1 between adjacent microbubble cutting teeth in the high-speed microbubble cutting diffusion oxygen dissolving unit 2 is 15 mm, and the height of the microbubble cutting teeth 22 is 40 mm. The side length of the quadrilateral top surface connecting the microbubble cutting teeth 22 to the disk 21 is 6 mm, and the side length of the quadrilateral bottom surface of the microbubble cutting teeth 22 is 2 mm. The outer diameter of the inner cylinder 6 is 120 mm. There are three layers of medium-sized bubble cutting teeth 31, each layer being V-shaped and 30mm high. The top of each medium-sized bubble cutting tooth 31 has a radial length of 70mm along the inner cylinder 6. The spacing between adjacent upper and lower layers is 20mm. The interval between medium-sized bubble cutting teeth 31 in the same layer 32 is 13mm. The number of medium-sized bubble cutting teeth 31 in each layer from top to bottom is 18, 16, and 16 respectively. There are four layers of large-sized bubble cutting teeth 41, each layer being V-shaped and 30mm high. The top of each large-sized bubble cutting tooth 41 has a radial length of 70mm along the inner cylinder 6. The spacing between adjacent upper and lower layers is 30mm. The interval between large-sized bubble cutting teeth 41 in each layer 42 is 20mm. The number of large-sized bubble cutting teeth 41 in each layer from top to bottom is 13, 12, 10, and 8 respectively. The height of the third inner cylinder section 613 is 1 / 3 of the height of the second inner cylinder section 612. There are 5 connecting rods 111. The horizontal distance between the outer edge of the medium bubble cutting teeth 31, the large bubble cutting teeth 41, and the air guide strip 5 and the inner wall of the outer cylinder 7 is 30mm. The height of the air diffuser 9 of the air diffuser unit is 40mm, and the bottom diameter of the air diffuser 9 is 1 / 3 of the inner diameter of the outer cylinder 7. The adjustable support leg 10 is adjustable in height by 100mm. The inner diameter of the outer cylinder 7 is 230mm. There are 5 fixing rods 91.

[0136] In actual operation, air is supplied to the aerobic biological reactor through the ventilation pipe at a flow rate of 15 m / s. The air enters the bottom of the multi-stage, multi-angle, high-speed diffusion oxygen-dissolving three-dimensional non-clogging microbubble aerator through the inlet pipe 1 and air pipe 62. Then, it is diffused out through the air diffuser 9 of the air diffuser unit to the area between the inner cylinder 6 and the outer cylinder 7. The air velocity after diffusion through the air diffuser unit is 1.0 m / s, causing the vertically downward airflow to change direction and diffuse upwards in a conical shape. It then spirals upwards along the air guide strips 5 of the air guide unit, with a flow rate of [missing information - likely a velocity value]. The air is cut into large bubbles at a velocity of 0.6 m / s, and then the air is cut into large bubbles by the large bubble cutting teeth 41 of the large bubble cutting diffusion oxygen dissolving unit 4. The air is cut into large bubbles at a velocity of 1.0 m / s. Then, the large bubbles are cut into medium bubbles by the medium bubble cutting teeth 31 of the medium bubble cutting diffusion oxygen dissolving unit 3. The large bubbles are cut into medium bubbles at a velocity of 2.0 m / s. Then, the medium bubbles flow out of the outer cylinder 7 at a velocity of 0.7 m / s. The medium bubbles are cut into micro bubbles by the micro bubble cutting teeth 22 of the ultra-fast micro bubble cutting diffusion oxygen dissolving unit 2. The medium bubbles are cut into micro bubbles at a velocity of 0.3 m / s.

[0137] Testing showed that when this multi-stage, multi-angle, rapid diffusion oxygen-dissolving three-dimensional non-clogging microbubble aerator was used to aerobically treat the coal gasification wastewater, the oxygen transfer rate was 22.3%.

[0138] In summary, this utility model provides a multi-stage, multi-angle, rapid diffusion oxygen-dissolving, three-dimensional, non-clogging microbubble aerator that integrates microbubble cutting, medium-sized bubble cutting, large bubble cutting, air-lift mixing, rapid and uniform diffusion, and enhanced mass transfer. It features a simple structure, small bubble diameter, high oxygen utilization and power efficiency, stable aerator performance, and long service life. It is suitable for aerobic biological treatment of various types of wastewater, especially for aerobic treatment of easily scaled wastewater or high sludge concentration biological systems. The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit its scope. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A multi-stage multi-angle ultra-fast diffusion oxygen-dissolving type three-dimensional clog-free micro-bubble aerator, characterized in that, An air inlet pipe (1) and an air pipe (62) are connected in sequence along the air intake direction. An ultra-fast microbubble cutting and diffusion oxygen dissolving unit (2) is sleeved outside the air inlet pipe (1). An inner cylinder (6) and an outer cylinder (7) are sleeved from the inside to the outside of the air pipe (62). The inner cylinder (6) and the outer cylinder (7) are hollow and spaced apart. The inner cylinder (6) is provided with a first inner cylinder section (611), a second inner cylinder section (612), and a third inner cylinder section (613) in sequence along the air intake direction. A medium bubble cutting and diffusion oxygen dissolving unit (3) is provided on the outer wall of the first inner cylinder section (6111). A large bubble cutting and diffusion oxygen dissolving unit (4) is provided on the outer wall of the second inner cylinder section (612). An air guiding unit is provided on the outer wall of the third inner cylinder section (613). An air diffuser unit is provided at the air outlet of the air pipe (62).

2. The multi-stage multi-angle ultra-fast diffuser dissolved oxygen type three-dimensional clog-free micro-bubble aerator according to claim 1, characterized in that, Includes one or more of the following conditions: A1) A flange (112) is connected to the air intake pipe (1); A2) The intake pipe (1) and the air pipe (62) are connected by a detachable threaded connection; A3) The ultra-fast microbubble cutting diffusion oxygen dissolving unit (2) includes a disc (21), the cross-section of the disc (21) gradually decreases from top to bottom along the air intake direction, and multiple microbubble cutting teeth (22) are provided on the outer side of the disc (21). A4) The air pipe (62) is located at the center of the inner cylinder (6) and the upper and lower ends of the air pipe (62) are flush with the inner sidewall of the inner cylinder (6); A5) The outer diameter of the inner cylinder (6) is 100-150 mm; A6) The medium bubble cutting diffusion oxygen dissolving unit (3) includes a number of medium bubble cutting tooth layers (32), and the medium bubble cutting tooth layer (32) includes a number of medium bubble cutting teeth (31). The medium bubble cutting teeth (31) in the same layer of the medium bubble cutting tooth layer (32) are arranged at intervals along the radial direction of the inner cylinder (6), and the medium bubble cutting teeth (31) in adjacent medium bubble cutting tooth layers (32) are arranged alternately. A7) The large bubble cutting diffusion oxygen dissolving unit (4) includes several large bubble cutting tooth layers (42), each large bubble cutting tooth layer (42) includes multiple large bubble cutting teeth (41), the large bubble cutting teeth (41) in the same layer of the large bubble cutting tooth layer (42) are arranged at intervals along the radial direction of the inner cylinder (6), and the large bubble cutting teeth (41) in adjacent large bubble cutting tooth layers (42) are arranged alternately; A8) The air guiding unit includes an air guiding strip (5), which is spirally arranged around the outer side wall of the inner cylinder (6). A9) The height of the third inner cylinder section (613) is 1 / 6 to 1 / 2 of the height of the second inner cylinder section (612); A10) The inner cylinder (6) and the outer cylinder (7) are connected by a connector, the connector (11) including a plurality of connecting rods (111), the two ends of the connecting rods (111) being connected to the inner cylinder (6) and the outer cylinder (7) respectively; A11) The air diffuser unit includes an air diffuser (9), which is conical and its cross-section gradually increases from top to bottom. The top of the air diffuser (9) is flush with the air outlet of the air pipe (62). A12) The inner diameter of the outer cylinder (7) is 180-280 mm; A13) The bottom of the outer cylinder (7) is provided with a base (8), which is connected to the bottom of the outer cylinder (7). The base (8) is also connected to the air diffuser unit via a fixing rod (91).

3. The multi-stage multi-angle ultra-fast diffuser dissolved oxygen type three-dimensional clog-free micro-bubble aerator according to claim 2, characterized in that, Item A3) includes one or more of the following conditions: A31) The disc body (21) is located between the air inlet end and the air outlet end of the air inlet pipe (1); A32) The height h2 of the disk body (21) is 80-120mm; A33) The cross-sectional shape of the disc body (21) is lotus-shaped, and the outer side of the disc body (21) is alternately provided with protrusions (23) and concave parts (24); A34) The microbubble cutting teeth (22) are evenly distributed on the outer surface of the disk body (21), and the spacing h1 between adjacent microbubble cutting teeth (22) is equal; A35) The microbubble cutting teeth (22) are vertically downward quadrangular frustums, and the cross-section of the microbubble cutting teeth (22) gradually decreases from top to bottom; The bottom surface of the microbubble cutting tooth (22) closest to the air tube (62) is close to the top surface of the inner cylinder (6).

4. The multi-stage multi-angle ultra-fast diffuser dissolved oxygen type three-dimensional clog-free micro-bubble aerator according to claim 2, characterized in that, Item A6) includes one or more of the following conditions: The number of layers in the bubble cutting tooth layer (32) described in A61) is 3 to 4; The spacing between adjacent bubble-cutting tooth layers (32) is equal; A63) The spacing between the medium bubble cutting teeth (31) in the same layer of the medium bubble cutting tooth layer (32) is equal; The number of medium bubble cutting teeth (31) in the medium bubble cutting tooth layer (32) of the same layer (A64) is 14 to 18; A65) The number of medium bubble cutting teeth (31) in the upper medium bubble cutting tooth layer (32) is greater than or equal to the number of medium bubble cutting teeth (31) in the lower medium bubble cutting tooth layer (32) along the top-to-bottom direction; The bubble cutting teeth (31) described in A66) are V-shaped or frustum-shaped, and the cross-section of the bubble cutting teeth (31) gradually decreases from top to bottom along the axial direction of the inner cylinder (6).

5. The multi-stage multi-angle ultra-fast diffuser dissolved oxygen type three-dimensional clog-free micro-bubble aerator according to claim 2, characterized in that, Item A7) includes one or more of the following conditions: The number of layers in the large bubble cutting tooth layer (42) described in A71) is 3 to 4; The spacing between adjacent large bubble cutting tooth layers (42) is equal; A73) The spacing between the large bubble cutting teeth (41) in the same layer of the large bubble cutting tooth layer (42) is equal; The number of large bubble cutting teeth (41) in the same layer of large bubble cutting teeth (42) is 8 to 13; A75) The number of large bubble cutting teeth (41) in the upper layer of the large bubble cutting tooth layer (42) is greater than or equal to the number of large bubble cutting teeth (41) in the lower layer of the large bubble cutting tooth layer (42) along the top-to-bottom direction; The large bubble cutting tooth (41) of A76) is V-shaped or frustum-shaped, and the cross-section of the large bubble cutting tooth (41) gradually decreases from top to bottom along the axial direction of the inner cylinder (6).

6. The multi-stage multi-angle ultra-fast diffuser dissolved oxygen type three-dimensional clog-free micro-bubble aerator according to claim 2, characterized in that, Item A10) includes one or more of the following conditions: In item A10), the two ends of the connecting rod (111) are respectively connected to the top of the outer side wall of the inner cylinder (6) and the top of the inner side wall of the outer cylinder (7); preferably, one end of the connecting rod (111) is detachably connected to the inner cylinder (6), and the other end of the connecting rod (111) is integrally cast to the outer cylinder (7). In item A10), the number of connecting rods (111) is 4 to 6; In item A103), adjacent connecting rods (111) are kept at a distance from each other; preferably, the distance between adjacent connecting rods (111) is equal.

7. The multi-stage multi-angle ultra-fast diffuser dissolved oxygen type three-dimensional clog-free micro-bubble aerator according to claim 2, characterized in that, Item A11) includes one or more of the following conditions: In item A111), the bottom diameter of the air diffuser (9) is 1 / 3 to 1 / 2 of the inner diameter of the outer cylinder (7); In item A11), the height of the air diffuser (9) is 30-50 mm. In item A113), the bottom of the air diffuser (9) is provided with an adjustable support leg (10).

8. The multi-stage multi-angle ultra-fast diffuser dissolved oxygen type three-dimensional clog-free micro-bubble aerator according to claim 2, characterized in that, Item A13) includes one or more of the following conditions: In item A13), the base (8) is detachably connected to the bottom of the outer cylinder (7); In item A13), one end of the fixing rod (91) is connected to the inner wall of the base (8), and the other end of the fixing rod (91) is connected to the outer side of the air diffuser (9) of the air diffuser unit. In item A13), the number of fixed rods (91) is 4 to 6.

9. The multi-stage multi-angle ultra-fast diffusion dissolved oxygen type three-dimensional clog-free micro-bubble aerator according to any one of claims 3-8, characterized in that, Includes one or more of the following conditions: In item A33), the cross-sectional shape of the protrusion (23) is semi-circular, and the radius of the cross-section of the protrusion (23) is 20-30 mm; the cross-sectional shape of the concave part (24) is semi-circular, and the radius of the cross-section of the concave part (24) is 20-30 mm. In item A33), the number of protrusions (23) and concave portions (24) is the same; In item A333), the number of protrusions (23) is 6 or 8; the number of recesses (24) is 6 or 8. In item A33), the horizontal distance between the outer edges of the opposing protrusions (23) on the top surface of the disc body (21) is 285 to 450 mm. In item A34), the spacing between adjacent microbubble cutting teeth (22) is 10-20 mm; In item A35), the height of the microbubble cutting tooth (22) is 30-50 mm; the side length of the quadrilateral top surface connecting the microbubble cutting tooth (22) to the disk body (21) is 4-8 mm; and the side length of the quadrilateral bottom surface of the microbubble cutting tooth (22) is 1-2 mm. In item A62), the spacing between adjacent bubble-cutting tooth layers (32) is 10-30 mm. In item A63), the spacing between the medium bubble cutting teeth (31) in the same layer of medium bubble cutting tooth layer (32) is 9 to 16 mm. In item A66), the height of the medium bubble cutting tooth (31) in the vertical direction is 10-30 mm; the length of the top of the medium bubble cutting tooth (31) in the radial direction along the inner cylinder (6) is 50-80 mm. In item A72), the spacing between adjacent large bubble cutting tooth layers (42) is 15-45 mm; In item A73), the spacing between the large bubble cutting teeth (41) in the same layer of large bubble cutting tooth layer (42) is 10-30 mm. In item A76), the height of the large bubble cutting tooth (41) in the vertical direction is 10-30 mm; the length of the top of the large bubble cutting tooth (41) in the radial direction of the inner cylinder (6) is 50-80 mm. In item A113), the adjustable leg (10) is an adjustable screw, and the adjustable height of the adjustable screw is 50-100mm.

10. The multi-stage multi-angle ultra-fast diffuser dissolved oxygen type three-dimensional clog-free micro-bubble aerator according to claim 2, characterized in that, The outer edges of the medium bubble cutting teeth, large bubble cutting teeth, and air guide strip are flush; the horizontal distance between the outer edges of the medium bubble cutting teeth, large bubble cutting teeth, and air guide strip and the inner side wall of the outer cylinder is 30-50mm.

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