A variable load high-efficiency air floatation water purification equipment based on micro-nano bubbles

Abstract

This invention relates to the field of wastewater treatment equipment technology, and more particularly to a variable-load high-efficiency air flotation water purification device based on micro-nano bubbles. It includes: a first shell with an embedded injection pipe, the injection pipe being equipped with a water quality concentration sensor; a second shell fixed to the first shell via a connecting rod, the injection pipe communicating with the interior of the second shell, the upper edge of the second shell being lower than the upper edge of the first shell; a third shell fixed to the second shell via a baffle; a packing tube fixed to the third shell; and an air storage tank fixed to the first shell, the air storage tank being connected to multiple first conduits, each conduit equipped with a first solenoid valve. This invention utilizes the fact that the upper edge of the second shell is lower than the upper edge of the first shell, allowing the flocculated material to overflow into the separation zone after reaction, which helps reduce secondary aggregation of flocculated material, bubble loss, and sedimentation caused by long-distance ascent, facilitating timely separation of scum.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment equipment technology, and in particular to a variable-load high-efficiency air flotation water purification device based on micro-nano bubbles. Background Technology

[0002] Against the backdrop of rapid industrialization and urbanization, water pollution control places higher demands on efficient suspended solids separation technologies. Air flotation, which releases microbubbles into water, causes these bubbles to adhere to suspended flocs, forming air-flocculated aggregates with a density lower than water. These aggregates then float to the liquid surface using buoyancy, achieving solid-liquid separation. This method is widely used in water treatment and industrial wastewater treatment. In existing equipment, the dissolved air release device is usually located at the bottom of the air flotation unit, with bubbles generated from the bottom and carrying flocs upwards to the liquid surface to complete the separation.

[0003] However, this bottom aeration method has significant mechanistic flaws. The flocs undergo a long ascent from adhering to air bubbles to reaching the liquid surface. Flocs at different stages of ascent overlap and crowd each other vertically, leading to frequent collisions and secondary aggregation, forming excessively large and loosely structured flocs. Although these flocs adhere to air bubbles, their overall mass is significantly increased, making it difficult for the buoyancy of the bubbles to continuously overcome gravity. This causes some flocs to stall, stagnate, or even sink in the opposite direction during their ascent, failing to reach the liquid surface smoothly. This not only reduces the efficiency of scum separation but may also deteriorate water quality due to the sedimented flocs entering the effluent area. Furthermore, the air bubbles experience a continuous decrease in hydrostatic pressure during their long ascent, causing some tiny air bubbles to dissolve and precipitate or merge, further weakening their ability to carry flocs from the middle and upper layers. Summary of the Invention

[0004] To overcome the above problems, the present invention provides a variable load high-efficiency air flotation water purification device based on micro-nano bubbles.

[0005] The technical solution of this invention is: a variable-load high-efficiency air flotation water purification device based on micro-nano bubbles, comprising: The first housing has an embedded injection tube, on which a water quality concentration sensor is installed, and the lower part of the first housing is connected to a drain pipe. The second housing is fixed inside the first housing by multiple connecting rods. The injection tube communicates with the interior of the second housing. The upper edge of the second housing is lower than the upper edge of the first housing. The third housing is fixed inside the second housing by multiple baffles, and the upper edge of the third housing is higher than the upper edge of the first housing; A packing tube is fixedly connected to the third housing, and the packing tube is provided with a packing port located in the annular space between the second housing and the third housing. The packing tube is used to add flocculant into the second housing. A gas storage tank is fixed to the side wall of the first housing. The gas storage tank is connected to a plurality of first conduits fixed to the first housing. The first conduits are provided with air jets. The air jets on the first conduits are located between the first housing and the second housing. A first solenoid valve is installed on the first conduit. A driving unit is disposed on the first housing, and the driving unit is used to drive the liquid medium in the second housing to flow upward.

[0006] More preferably, the extension line of the liquid outlet of the injection tube intersects with the central axis of the second housing, so that the liquid medium injected into the second housing flows in a spiral manner.

[0007] More preferably, the driving-away unit includes: The support is fixed to the upper part of the first housing; A drive motor is fixedly connected to the upper surface of the support; The first rotating shaft is rotatably mounted on the support, and the first rotating shaft is fixedly connected to the output shaft of the drive motor. The lower part of the first rotating shaft penetrates the third housing and rotates in a sealed manner with it. The impeller is fixed to the lower end of the first rotating shaft.

[0008] More preferably, the support is rotatably provided with a second rotating shaft, which is driven by a sprocket and a chain to the first rotating shaft. The third housing is rotatably provided with a rotating frame, which is driven by a gear set to the second rotating shaft. The first housing is fixedly connected with a slag guide shell, and the rotating frame is used to drive the slag on the liquid surface in the first housing into the slag guide shell.

[0009] More preferably, it also includes: Multiple rotating plates are rotatably disposed between the second housing and the third housing; An electric push rod is fixedly connected inside the third housing; A sliding frame is slidably disposed within the third housing, and the telescopic end of the electric push rod is fixedly connected to the sliding frame; Multiple racks are all fixedly connected to the sliding frame; Multiple spur gears are fixedly connected to adjacent rotating plates, and the rack meshes with the adjacent spur gears.

[0010] More preferably, it also includes: Multiple partition rings are slidably disposed on the corresponding baffles, and the central axis of all the partition rings coincides with the central axis of the third housing; Multiple second conduits are respectively fixed to all of the partition rings and the second housing, and the second conduits are provided with multiple air jets; The third conduit is fixed to the third housing and is connected to all the second conduits and the gas storage tank. The section of the third conduit between the second housing and the third housing is configured as a flexible hose. The partition ring has a notch, and the flexible hose section of the third conduit is located within the notch of the partition ring. The third conduit is fixed to a second solenoid valve.

[0011] More preferably, the separator ring is divided into a variable diameter section and a constant diameter section, and the variable diameter section on the separator ring is used to guide the inclined flow of the liquid medium.

[0012] More preferably, the diameter of the air outlet on the second conduit is larger than the diameter of the air outlet on the first conduit.

[0013] More preferably, the air jets on the second duct are distributed at an angle.

[0014] More preferably, the second housing is fixedly connected to a fixing block, the fixing block is rotatably connected to a swing rod, the third housing is slidably connected to a sliding sleeve, the sliding sleeve is rotatably connected to a first rotating sleeve, the first rotating sleeve is slidably connected to the swing rod, the swing rod is slidably connected to a plurality of second rotating sleeves, the second rotating sleeves are rotatably connected to the corresponding separating ring, the sliding frame is fixedly connected to a fixing rod, the third housing is provided with a sliding groove, the fixing rod slides within the sliding groove of the third housing, the fixing rod is fixedly connected to the sliding sleeve, and the sliding sleeve is used to cover the sliding groove on the third housing.

[0015] Compared with the prior art, the technical effects achieved by the present invention are: 1. Short-stroke floating alleviates the problem of long-distance floating: The upper edge of the second shell is lower than the upper edge of the first shell. After the flocs complete the coagulation reaction in the second shell, they overflow into the separation zone and come into contact with the air bubbles over a shorter distance. The total floating stroke is shortened, which helps to reduce the secondary aggregation of flocs, air bubble loss and partial settling that may be caused by long-distance climbing in the traditional bottom air distribution method, and facilitates the timely separation of scum.

[0016] 2. Improved hydraulic flow and enhanced mixing and separation efficiency: The injection pipe introduces water tangentially, intersecting the central axis of the second shell, causing the wastewater to flow in a spiral pattern within the second shell. This prolongs the hydraulic residence time and promotes initial mixing of the flocculant and wastewater. The baffles rectify the upward flow, facilitating a more orderly vertical flow pattern, reducing turbulence interference, and providing a relatively stable hydraulic environment for the flocculation reaction. The impeller's guiding effect in the driving unit contributes to flow field stability and plays a positive role in mitigating unfavorable flow patterns such as short-circuiting and dead zones.

[0017] 3. Dual-path stratified aeration improves bubble distribution and adhesion conditions: The air storage tank simultaneously supplies air to both the first and second ducts. The second duct is distributed within a multi-layered annular flow channel divided by a partition ring, which facilitates the stratified release of bubbles along the water depth direction, alleviating the problem of uneven bubble concentration distribution in traditional bottom aeration methods. The nozzle diameter of the second duct is larger than that of the first duct, allowing larger bubbles to contact and adhere to the flocs first, followed by smaller bubbles to supplement the adhesion. This relay-style adhesion process helps improve the probability of gas-solid bonding and buoyancy stability.

[0018] 4. The operating parameters are adjustable, exhibiting a certain degree of adaptability to water quality fluctuations: The rotating plate is driven by an electric push rod via a rack and spur gear, adjusting the flow cross-section between the second and third housings, thereby regulating the wastewater flow rate and reaction time. The separating ring, via a swing rod, the first rotating sleeve, and the second rotating sleeve, moves up and down in a coordinated manner, changing the distance between the second duct jet nozzle and the variable diameter section of the separating ring, providing an adjustment means to optimize bubble adhesion conditions. These adjustments are executed by the control terminal based on monitoring signals from the water quality concentration sensor, enabling the equipment to match and adjust process parameters under different influent concentrations to maintain a relatively stable operating state. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the second housing and the first conduit of the present invention.

[0021] Figure 3 This is a cross-sectional view of the first and second housings of the present invention.

[0022] Figure 4 This is a cross-sectional view of the second and third housings of the present invention.

[0023] Figure 5 This is a three-dimensional structural diagram of the first rotating shaft and impeller of the present invention.

[0024] Figure 6 This is a cross-sectional view of the third housing and rotating plate of the present invention.

[0025] Figure 7 This is a cross-sectional view of the second housing and baffle of the present invention.

[0026] Figure 8 This is a three-dimensional structural diagram of the third conduit and the second solenoid valve of the present invention.

[0027] Figure 9 This is a cross-sectional view of the second housing and the partition ring of the present invention.

[0028] Figure 10This is a cross-sectional view of the separator ring and the first rotating sleeve of the present invention.

[0029] The markings in the attached diagram are as follows: 1-First housing, 2-Leg, 201-Control terminal, 3-Injection pipe, 301-Water quality concentration sensor, 4-Drain pipe, 5-Connecting rod, 6-Second housing, 7-Baffle, 8-Third housing, 9-Stuffing tube, 10-Gas storage tank, 11-First conduit, 1101-First solenoid valve, 12-Support, 13-Drive motor, 14-First rotating shaft, 15-Impeller, 16-Second rotating shaft, 17-Rotating frame, 18-Slag guide shell, 19-Rotating plate, 20-Electric push rod, 21-Sliding frame, 22-Rack, 23-Spur gear, 24-Separating ring, 25-Second conduit, 26-Third conduit, 2601-Second solenoid valve, 27-Fixing block, 28-Swing rod, 29-Sliding sleeve, 30-First rotating sleeve, 31-Second rotating sleeve, 32-Fixing rod. Detailed Implementation

[0030] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention. Example 1

[0031] A variable-load high-efficiency air flotation water purification device based on micro-nano bubbles, such as Figures 1-4As shown, the system includes a first housing 1, with a support leg 2 fixedly connected to the lower part of the first housing 1. A control terminal 201 is mounted on the support leg 2 and is electrically connected to all the electrical components described below. A liquid injection pipe 3 is embedded in the lower part of the first housing 1, and a water quality concentration sensor 301 is configured in the liquid injection pipe 3 for real-time detection of the influent water quality. A drain pipe 4 is connected to the lower part of the first housing 1 to discharge the separated clean water. A second housing 6 is fixedly connected to the inside of the first housing 1 through multiple connecting rods 5. The liquid injection pipe 3 communicates with the inner cavity of the second housing 6, and the extension line of the liquid injection pipe 3 outlet is staggered with the central axis of the second housing 6, so that the water to be treated injected into the second housing 6 forms a spiral flow inside the housing, thereby prolonging the hydraulic residence time and promoting the mixing of the reagents. The upper edge of the second housing 6 is lower than the upper edge of the first housing 1 so that the flocculants can enter the subsequent separation zone in a short-path overflow manner. The interior of the second housing 6 is connected by a peripheral... A third housing 8 is fixed to multiple baffles 7 distributed at equal intervals. The upper edge of the third housing 8 is higher than the upper edge of the first housing 1. A packing tube 9 is fixed inside the third housing 8. The lower part of the packing tube 9 is provided with a packing port. The packing port is located in the annular space between the second housing 6 and the third housing 8, and the packing port is evenly distributed in the annular space. It is used to evenly add flocculant into the second housing 6. A gas storage tank 10 is fixed to the side wall of the first housing 1. The gas storage tank 10 is connected to two first conduits 11 fixed to the first housing 1. The first conduits 11 are provided with air jets. The air jets on the first conduits 11 are vertically arranged. The air jets are located in the annular separation area between the first housing 1 and the second housing 6. A first solenoid valve 1101 is installed on the first conduits 11 to control the on / off state and flow rate of bubble release. A driving unit is provided on the first housing 1 to drive the water to be treated in the second housing 6 to flow upward.

[0032] like Figure 2 and Figure 4 As shown, the driving unit includes a support 12, which is fixed to the upper part of the first housing 1. A drive motor 13 is mounted on the upper surface of the support 12. A first rotating shaft 14 is rotatably mounted on the support 12 via a bearing, and the first rotating shaft 14 is fixedly connected to the output shaft of the drive motor 13. The lower part of the first rotating shaft 14 passes through the lower part of the third housing 8. An impeller 15 is fixedly mounted at the end of the first rotating shaft 14. When the impeller 15 rotates, it generates an upward driving force in the third housing 8, forcing the fluid to move upward.

[0033] like Figure 2 and Figure 4As shown, a second rotating shaft 16 is rotatably mounted on the support 12. The second rotating shaft 16 is linked to the first rotating shaft 14 through a sprocket and chain transmission mechanism. A rotating frame 17 is rotatably mounted on the upper part of the third housing 8. The rotating frame 17 is connected to the second rotating shaft 16 through a gear transmission, thereby transmitting the driving force to the liquid surface scraping component. A slag guide shell 18 is fixedly connected to the first housing 1. The rotating frame 17 is used to scrape the scum on the liquid surface inside the first housing 1 into the slag guide shell 18, so as to realize the continuous automatic discharge of scum.

[0034] Specific working principle: The operator connects the constant pressure water pump to the injection pipe 3 through a pipeline and places the constant pressure water pump in the sewage tank. At the same time, the flocculant injection equipment is connected to the packing pipe 9. Then, the water purification equipment is started through the control terminal 201. The constant pressure water pump works to pump the sewage to the injection pipe 3. The sewage enters the interior of the second shell 6 tangentially along the injection pipe 3 in a direction that is intersecting the central axis of the second shell 6. Under the guidance of the injection pipe 3, it flows in a spiral state, which effectively prolongs the hydraulic residence time and enhances the subsequent mixing effect of the agents. As the liquid level rises, the sewage overflows the upper edge of the second shell 6 and enters the annular separation zone of the first shell 1. Finally, it is discharged from the equipment through the drain pipe 4 at the bottom of the first shell 1.

[0035] During the sewage flow process, the flocculant injection equipment continuously delivers flocculant into the packing pipe 9. The flocculant is evenly injected into the sewage through the packing port located between the second shell 6 and the third shell 8 in the packing pipe 9. At the same time, the drive motor 13 drives the impeller 15 to rotate through the first rotating shaft 14, forming an upward suction force in the third shell 8. This forces the sewage and flocculant mixture in the second shell 6 to rise vertically. During the rise, the sewage flows through the baffle 7. Due to the flow-rectifying and blocking effect of the baffle 7, the water flow is regulated into an orderly vertical upward flow state, which greatly reduces the interference of lateral turbulence. This allows the flocculant to fully contact and react with the organic matter in the sewage, generating a dense flocculant that is easy to separate by air flotation.

[0036] As the wastewater carrying flocs flows past the upper edge of the second shell 6 and overflows into the separation zone, the high-pressure gas in the gas storage tank 10 is controlled by the first solenoid valve 1101 and released into a large number of microbubbles from the jet nozzle at the end of the first conduit 11. The microbubbles quickly adsorb onto the surface of the flocs, significantly reducing the overall apparent density of the flocs, allowing them to float efficiently to the liquid surface inside the first shell 1 under buoyancy to form a scum layer. At the same time, the rotational motion of the first rotating shaft 14 is transmitted to the second rotating shaft 16 via a sprocket and chain, and then driven by the gear set to reduce speed and increase torque, driving the rotating frame 17 to rotate stably around the third shell 8. The rotating frame 17 continuously scrapes the scum on the liquid surface and drives it into the scum guide shell 18. The scum guide shell 18 guides the scum and a small amount of wastewater to the subsequent treatment stage, realizing continuous automatic removal of scum and maintaining a clean liquid surface.

[0037] Throughout the water purification process, the water quality concentration sensor 301 monitors the concentration of pollutants in the influent in real time and feeds the signal back to the control terminal 201 immediately. The control terminal 201 dynamically adjusts the amount of flocculant added to the packing tube 9 and the amount of air jet controlled by the first solenoid valve 1101 according to the preset process logic, so as to ensure that the amount of flocculant generated and the amount of air bubble supplied are always in the best matching state, thereby ensuring that the flocculants float efficiently and stably and continuously optimize the quality of the effluent. Example 2

[0038] Based on Example 1, such as Figure 3 , Figure 5 and Figure 6 As shown, the device also includes multiple rotating plates 19 circumferentially distributed. Each rotating plate 19 is rotatably disposed in the annular area between the second housing 6 and the third housing 8. Two electric push rods 20 are fixedly connected inside the third housing 8. The telescopic ends of the two electric push rods 20 are jointly fixedly connected to a sliding frame 21. The sliding frame 21 slides inside the third housing 8. Multiple racks 22 are fixedly mounted on the sliding frame 21 circumferentially distributed. Each rack 22 meshes with a spur gear 23 fixedly connected to the corresponding rotating plate 19. Through the telescopic movement of the electric push rods 20, the rotating plates 19 can be driven to deflect synchronously, thereby changing the cross-sectional area of ​​the flow channel between the second housing 6 and the third housing 8 to adjust the upward speed of the water flow and the reaction time to adapt to changes in water quality.

[0039] Specific working principle: During the water purification process, the control terminal 201 also issues an action command to the electric push rod 20 based on the sewage concentration signal fed back by the water quality concentration sensor 301. The extension end of the electric push rod 20 drives the sliding frame 21 and all the racks 22 fixed thereon to move synchronously. The linear motion of the racks 22 drives the spur gear 23 meshing with it to rotate. The spur gear 23 then drives the corresponding rotating plate 19 to deflect in the annular channel between the second housing 6 and the third housing 8.

[0040] When the wastewater concentration is high, the control terminal 201 instructs the electric push rod 20 to rotate the rotating plate 19 horizontally. At this time, the flow cross section of the annular channel is reduced. Due to the action of the constant pressure pump, the wastewater pressure injected into the second housing 6 remains relatively stable, reducing the amount of wastewater passing through the rotating plate 19 per unit time. The constant pressure pump's discharge rate decreases due to increased system resistance, effectively slowing down the wastewater flow velocity in the upper part of the second housing 6 and extending the flocculation reaction time, thus ensuring sufficient coagulation under high load conditions. When the wastewater concentration decreases, the electric push rod 20 reverses its action, causing the rotating plate 19 to tend towards a vertical state, increasing the flow cross section and increasing the flow velocity in the upper part of the second housing 6. This improves the equipment's water purification efficiency while ensuring the quality of the effluent, achieving real-time optimization matching between treatment capacity and energy consumption. Example 3

[0041] Based on Example 2, such as Figure 2 and Figures 7-9 As shown, the device is also equipped with multiple partition rings 24, each partition ring 24 slidingly fitted onto a corresponding baffle 7, and the central axis of all partition rings 24 coincides with the central axis of the third housing 8, forming a multi-layered concentric annular flow channel. The partition rings 24 are divided into variable diameter sections and constant diameter sections. The cross-section of the variable diameter section on the partition ring 24 gradually decreases from top to bottom, which is used to guide the water to be treated to flow at an angle, which helps to extend the contact trajectory between bubbles and flocculants. Each partition ring 24 and the second housing 6 are fixedly connected to a second conduit 25, and each second conduit 25 is provided with multiple inclined jet nozzles to optimize the direction and uniformity of bubble release. The diameter of the jet nozzle on the second conduit 25 is larger than the diameter of the jet nozzle on the first conduit 11. The third housing 8 is fixedly connected to the third conduit 26. The upper end of the third conduit 26 is connected to the gas storage tank 10, and the lower part of the third conduit 26 is connected to all the second conduits 25. The section of the third conduit 26 between the second housing 6 and the third housing 8 is in the form of a flexible hose to accommodate the vertical movement of the second conduit 25. A notch is correspondingly opened on the separator ring 24, and the flexible hose section is embedded in the notch to accommodate the lifting and lowering movement of the separator ring 24. A second solenoid valve 2601 is installed on the third conduit 26 to independently control the release of the bubbles in this path.

[0042] like Figure 9 and Figure 10 As shown, two symmetrically distributed fixed blocks 27 are fixedly connected to the second housing 6, and a swing rod 28 is rotatably connected to the fixed blocks 27. A sliding sleeve 29 is slidably disposed on the third housing 8, and two symmetrically distributed first rotating sleeves 30 are rotatably disposed on the sliding sleeve 29. The first rotating sleeves 30 are slidably connected to the adjacent swing rods 28. Multiple second rotating sleeves 31 are slidably disposed on the swing rods 28, and the second rotating sleeves 31 are rotatably connected to the corresponding separating rings 24. Two symmetrically distributed fixed rods 32 are fixedly connected to the sliding frame 21. The third housing 8... Two symmetrically distributed grooves are provided on the upper part. The fixed rod 32 passes through the corresponding groove and is fixedly connected to the sliding sleeve 29. The sliding sleeve 29 covers the surface of the groove, which plays a role in shielding and sealing to prevent liquid from splashing out. When the electric push rod 20 drives the sliding frame 21 to move, the fixed rod 32, the sliding sleeve 29 and the first rotating sleeve 30 drive the swing rod 28 to swing. Then, the second rotating sleeve 31 pushes and pulls each partition ring 24 to rise and fall synchronously, so as to adjust the relative distance between the jet nozzle of the second guide tube 25 and the variable diameter section of the partition ring 24 and optimize the bubble adhesion conditions.

[0043] Specific working principle: As the wastewater and flocculants rise, the mixture passes through an annular partitioned flow channel composed of multiple partition rings 24 and baffles 7. Under the physical separation of the partition rings 24, the rising water flow is evenly distributed to each layer of the flow channel, effectively preventing excessive local aggregation of flocculants and resulting in a more balanced vertical distribution of the flocculants. Simultaneously, the guide profile of the variable-diameter section of the partition rings 24 guides the water flow and flocculants along an inclined path, further extending the contact trajectory between the bubbles and the flocculants. During this stage, the gas in the gas storage tank 10 enters the third layer via the second solenoid valve 2601. The conduit 26 distributes the microbubbles to the second conduits 25 at each stage. Microbubbles are released from the jet nozzles on the second conduits 25, which are distributed at an angle. Since the diameter of the jet nozzles in the second conduit 25 is larger than that in the first conduit 11, the bubbles in this path are slightly larger and have stronger kinetic energy, and they preferentially collide and adhere to the flocs flowing through them. Subsequently, even finer bubbles from the jet nozzles in the first conduit 11 further adhere to the flocs that have already been initially adhered to in the main separation zone, forming a multi-layered, relay-style bubble adhesion process, which greatly improves the gas-solid adhesion efficiency and buoyancy stability.

[0044] Furthermore, when the electric push rod 20 is activated, the displacement of the sliding frame 21 is transmitted to the first rotating sleeve 30 through the fixed rod 32 and the sliding sleeve 29, driving the first rotating sleeve 30 to slide along the third housing 8, thereby forcing the swing rod 28 to swing around the fixed block 27. When the swing rod 28 swings, the second rotating sleeve 31 installed on it pushes and pulls the partition rings 24 of each layer to move up and down along the baffle 7, thereby realizing the synchronous adjustment of the height position of the partition rings 24.

[0045] When the wastewater concentration is high, the control terminal 201 instructs the electric push rod 20 to reduce the distance between the upper edges of the two adjacent separating rings 24, thereby shortening the distance between the jet nozzle of the second guide pipe 25 and the guide surface of the variable diameter section of the upper separating ring 24. After the bubbles are released, they can directly act on the high-concentration flocs with the shortest path and the least loss, significantly improving the probability of bubble adhesion. When the wastewater concentration is low, the above distance is appropriately increased to avoid excessive aeration that would cause energy waste and floc shearing and breakage. This adaptive adjustment mechanism ensures that bubbles and flocs can achieve optimal contact conditions under different water quality conditions, guaranteeing efficient and stable operation of the equipment within a wide load range from a mechanistic perspective.

[0046] Although the invention has been described with respect to only a limited number of embodiments, those skilled in the art who benefit from this disclosure will understand that various other embodiments can be devised without departing from the scope of the invention. Therefore, the scope of the invention should be limited only by the appended claims.

Claims

1. A variable-load high-efficiency air flotation water purification device based on micro-nano bubbles, characterized in that, include: The first housing (1) is embedded with a liquid injection tube (3), and a water quality concentration sensor (301) is installed in the liquid injection tube (3). The lower part of the first housing (1) is connected to a drain pipe (4). The second housing (6) is fixed inside the first housing (1) by multiple connecting rods (5). The injection tube (3) is connected to the interior of the second housing (6). The upper edge of the second housing (6) is lower than the upper edge of the first housing (1). The third housing (8) is fixed inside the second housing (6) by a plurality of baffles (7), and the upper edge of the third housing (8) is higher than the upper edge of the first housing (1); The packing tube (9) is fixed inside the third housing (8), and the packing tube (9) is provided with a packing port located in the annular space between the second housing (6) and the third housing (8). The packing tube (9) is used to add flocculant into the second housing (6). A gas storage tank (10) is fixed to the side wall of the first housing (1). The gas storage tank (10) is connected to a plurality of first conduits (11) fixed to the first housing (1). A jet nozzle is provided on the first conduit (11). The jet nozzle on the first conduit (11) is located between the first housing (1) and the second housing (6). A first solenoid valve (1101) is installed on the first conduit (11). A driving unit is disposed on the first housing (1), and the driving unit is used to drive the liquid medium in the second housing (6) to flow upward.

2. The variable-load high-efficiency air flotation water purification device based on micro-nano bubbles according to claim 1, characterized in that, The extension line of the liquid outlet of the injection pipe (3) intersects with the central axis of the second housing (6), and the liquid medium used to inject into the second housing (6) flows in a spiral.

3. The variable-load high-efficiency air flotation water purification device based on micro-nano bubbles according to claim 1, characterized in that, The driving unit includes: Support (12) is fixed to the upper part of the first housing (1); A drive motor (13) is fixed to the upper surface of the support (12); The first rotating shaft (14) is rotatably mounted on the support (12), and the first rotating shaft (14) is fixedly connected to the output shaft of the drive motor (13). The lower part of the first rotating shaft (14) penetrates the third housing (8) and rotates in a sealed manner with it. The impeller (15) is fixed to the lower end of the first rotating shaft (14).

4. The variable-load high-efficiency air flotation water purification device based on micro-nano bubbles according to claim 3, characterized in that, The support (12) is rotatably provided with a second rotating shaft (16), and the second rotating shaft (16) is connected to the first rotating shaft (14) by a sprocket and a chain drive. The third housing (8) is rotatably provided with a rotating frame (17), and the rotating frame (17) is connected to the second rotating shaft (16) by a gear set drive. The first housing (1) is fixedly connected with a slag guide shell (18), and the rotating frame (17) is used to drive the slag on the liquid surface in the first housing (1) into the slag guide shell (18).

5. The variable-load high-efficiency air flotation water purification device based on micro-nano bubbles according to claim 1, characterized in that, Also includes: Multiple rotating plates (19) are rotatably disposed between the second housing (6) and the third housing (8); An electric push rod (20) is fixedly connected inside the third housing (8); The sliding frame (21) is slidably disposed in the third housing (8), and the telescopic end of the electric push rod (20) is fixedly connected to the sliding frame (21); Multiple racks (22) are fixedly connected to the sliding frame (21); Multiple spur gears (23) are fixedly connected to adjacent rotating plates (19), and the rack (22) meshes with the adjacent spur gears (23).

6. The variable-load high-efficiency air flotation water purification device based on micro-nano bubbles according to claim 5, characterized in that, Also includes: Multiple partition rings (24) are slidably disposed on the corresponding baffles (7), and the central axis of all partition rings (24) coincides with the central axis of the third housing (8); Multiple second conduits (25) are respectively fixed to all the partition rings (24) and the second housing (6), and the second conduits (25) are provided with multiple air jets; The third conduit (26) is fixed to the third housing (8), and the third conduit (26) is connected to all the second conduits (25) and the gas storage tank (10). The section of the third conduit (26) between the second housing (6) and the third housing (8) is configured as a flexible hose. The partition ring (24) has a notch, and the flexible hose section of the third conduit (26) is located in the notch of the partition ring (24). The third conduit (26) is fixed to the second solenoid valve (2601).

7. The variable-load high-efficiency air flotation water purification device based on micro-nano bubbles according to claim 6, characterized in that, The separator ring (24) is divided into a variable diameter section and a constant diameter section. The variable diameter section on the separator ring (24) is used to guide the liquid medium to flow at an angle.

8. The variable-load high-efficiency air flotation water purification device based on micro-nano bubbles according to claim 6, characterized in that, The diameter of the jet nozzle on the second conduit (25) is larger than the diameter of the jet nozzle on the first conduit (11).

9. A variable-load high-efficiency air flotation water purification device based on micro-nano bubbles according to claim 6, characterized in that, The jet nozzles on the second duct (25) are distributed at an angle.

10. A variable-load high-efficiency air flotation water purification device based on micro-nano bubbles according to claim 6, characterized in that, The second housing (6) is fixedly connected to a fixing block (27), the fixing block (27) is rotatably provided with a swing rod (28), the third housing (8) is slidably provided with a sliding sleeve (29), the sliding sleeve (29) is rotatably provided with a first rotating sleeve (30), the first rotating sleeve (30) is slidably connected to the swing rod (28), the swing rod (28) is slidably provided with a plurality of second rotating sleeves (31), the second rotating sleeves (31) are rotatably connected to the corresponding separating ring (24), the sliding frame (21) is fixedly connected to a fixing rod (32), the third housing (8) is provided with a sliding groove, the fixing rod (32) slides in the sliding groove of the third housing (8), the fixing rod (32) is fixedly connected to the sliding sleeve (29), and the sliding sleeve (29) is used to cover the sliding groove on the third housing (8).

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