High-efficiency air floatation separation equipment for wastewater recovery

Abstract

The utility model provides a kind of high-efficiency air flotation separation equipment for wastewater recovery, including air flotation box, the inside of air flotation box is equipped with stirring mechanism, the top of air flotation box is fixedly installed with deslagging mechanism, the side of air flotation box is fixedly installed with driving mechanism, during the application of this technical scheme, it is made into collaborative system by setting driving motor, deslagging mechanism and air supply module group, so that during use, driving motor can be used to provide power for stirring mechanism and deslagging mechanism simultaneously, multiple driving sources are not needed, and the deslagging mechanism can continuously transport and discharge floating dregs through conveying auger and deslagging pipe, thereby achieving the effects of simplifying equipment structure, reducing energy consumption, continuously and uninterruptedly discharging floating dregs, solving the problems of equipment downtime caused by frequent manual cleaning of collection components in the prior art, increased structural complexity and energy consumption of multiple driving sources, and affecting large-scale wastewater treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a high-efficiency air flotation separation device for wastewater recycling. Background Technology

[0002] Currently, in the field of water treatment, dissolved air flotation (DAF) machines are key equipment for achieving solid-liquid separation. Their core working principle involves generating a large number of microbubbles in water through a dissolved air system. These highly dispersed microbubbles adhere to suspended particles, forming a mixture with a density less than water. The mixture then floats on the surface using buoyancy, thus completing the solid-liquid separation process. Based on structural and functional differences, DAF machines are mainly classified into ultra-efficient shallow DAF machines, vortex DAF machines, and horizontal flow DAF machines. With significant advantages such as low investment, small footprint, high degree of automation, and convenient operation and management, they have been widely applied in various scenarios including water supply treatment, industrial wastewater treatment, and municipal sewage treatment, providing efficient solid-liquid separation solutions for diverse water treatment needs. During the actual operation of an air flotation machine, suspended particles float to the water surface under the action of air bubbles. If these floating particles are not scraped off or collected in time, they are easily re-mixed into the water, affecting the efficiency and effectiveness of subsequent solid-liquid separation operations. Therefore, how to efficiently collect floating debris from the water surface has become a key aspect in the design and application of air flotation machines. To solve this problem, relevant technical fields have carried out targeted research and development. For example, Chinese patent CN219971909U discloses an air flotation machine for water treatment. This device sets support blocks at the front and rear ends on both sides of the air flotation machine body. The support blocks are connected to threaded rods via bearings. The movable plate inside the air flotation machine body cooperates with the threaded blocks on the surface of the threaded rod. The position of the movable plate is adjusted by the transmission between the threaded rod and the threaded blocks, thereby driving the collection box to slide within the air flotation machine body to complete the collection of floating debris from the water surface. This alleviates the problem of floating debris accumulation affecting solid-liquid separation to a certain extent and provides a technical reference for the functional optimization of air flotation machines. However, the aforementioned dissolved air flotation (DAF) machines for water treatment still have significant defects and shortcomings in practical applications, making it difficult to meet the high-efficiency and continuous operation requirements of large-scale wastewater treatment scenarios. On the one hand, the device relies on a collection box to collect floating matter. When the collection box is full, manual cleaning of the impurities inside is required. In large-scale wastewater treatment, the collection box needs frequent shutdowns for cleaning and maintenance, preventing continuous sludge discharge and severely impacting overall water treatment efficiency. On the other hand, the device lacks an effective stirring and uniform aeration structure, preventing the bubbles generated by the dissolved air system from fully mixing with wastewater and suspended particles. The efficiency of bubble attachment to suspended matter is low, resulting in poor overall flotation performance and difficulty in achieving ideal solid-liquid separation. These problems limit the application of existing DAF machines in high-load, high-efficiency water treatment scenarios. Therefore, it is urgent to improve the design of the existing DAF machine structure to solve the problems of insufficient continuous sludge discharge capacity and poor aeration mixing effect, thereby improving the overall operating performance and applicability of the DAF machine. Utility Model Content

[0003] To address the aforementioned problems, this invention proposes a high-efficiency air flotation separation device for wastewater recycling, which can more accurately solve the problems described above.

[0004] This utility model is achieved through the following technical solution: This utility model proposes a high-efficiency air flotation separation device for wastewater recycling, including an air flotation tank, an agitation mechanism inside the air flotation tank, a slag discharge mechanism fixedly installed on the top of the air flotation tank, and a drive mechanism fixedly installed on one side of the air flotation tank. The output end of the drive mechanism is connected to the agitation mechanism and the slag discharge mechanism respectively. The drive mechanism includes a side frame and an outer frame. The side frame is fixedly installed on the lower side of the air flotation tank. A drive gear is fixedly installed on the inner side of the side frame. The drive gear is connected to the stirring mechanism. The outer frame is fixedly installed on the lower outer side of the air flotation tank and is located on the outer side of the side frame. A drive motor is fixedly installed on the outer side of the outer frame. The output end of the drive motor passes through the outer frame and is fixedly connected to the outer side of the drive gear.

[0005] Furthermore, the slag discharge mechanism includes a top concentrator and a synchronous pulley. The top concentrator is fixedly installed on the top of the flotation tank. A concentrator frame is fixedly installed on the top of the top concentrator. A conveying auger is rotatably connected inside the concentrator frame. A slag discharge pipe is fixedly installed on the lower side of one side of the concentrator frame. The synchronous pulley is fixedly installed on the output end of the drive motor. The output end of the drive motor passes through the synchronous pulley and is fixedly connected to the outside of the drive gear. The synchronous pulley is also rotatably connected to the side of the concentrator frame near the drive motor. The two synchronous pulleys are connected by a synchronous belt drive. The synchronous pulley at the upper end is connected to the conveying auger through a coupling.

[0006] Furthermore, the overall cross-sectional shape of the top centralized hopper is an isosceles trapezoid, and a sewage inlet pipe is fixedly installed on the middle of one side of the top centralized hopper.

[0007] Furthermore, the stirring mechanism includes a main air flotation pipe and an air supply module. The main air flotation pipe is rotatably connected to the lower end of the air flotation tank. Side stirring frames are fixedly installed at equal intervals on the outer surface of the main air flotation pipe. Air flotation aeration pipes are fixedly installed on the outer side of the side stirring frames. Air flotation nozzles are fixedly installed at equal intervals in a linear arrangement on the outer side of the air flotation aeration pipes. The air supply module is fixedly installed on the lower outer side of the air flotation tank. The output end of the air supply module is connected to the input end of the main air flotation pipe. An annular pipe is fixedly installed on one side of the main air flotation pipe. The inner side of the annular pipe is connected to the main air flotation pipe. The output end of the annular pipe is connected to the input end of each air flotation aeration pipe.

[0008] Furthermore, the air supply module includes a rotary joint and a mounting block. The rotary joint is rotatably connected to the lower end of one side of the air flotation box. The input end of the rotary joint is connected to the main air flotation pipe. The mounting block is fixedly installed on the lower end of the side of the air flotation box near the side frame. An air pump is fixedly installed on the outside of the mounting block. The output end of the air pump is connected to the input end of the rotary joint. A toothed ring is fixedly connected to the outer surface of the rotary joint. The toothed ring meshes with a drive gear.

[0009] Furthermore, mounting brackets are fixedly installed on the upper ends of both sides of the air flotation box, and support legs are fixedly installed on both ends of the mounting brackets, with support bases fixedly installed at the bottom of the support legs.

[0010] Furthermore, a connecting flange is fixedly installed at the input end of the sewage inlet pipe.

[0011] The beneficial effects of this utility model are: 1. During the application of this technical solution, by setting up a collaborative system consisting of a drive motor, a slag discharge mechanism, and an air supply module, the drive motor can simultaneously provide power to both the stirring mechanism and the slag discharge mechanism during use, eliminating the need for multiple drive sources. Furthermore, the slag discharge mechanism can continuously transport and discharge scum through a conveying auger and a slag discharge pipe, thereby simplifying the equipment structure, reducing energy consumption, and achieving continuous and uninterrupted discharge of scum. This solves the problems in existing technologies where frequent manual cleaning of collection components leads to equipment downtime, and multiple drive sources increase structural complexity and energy consumption, affecting the efficiency of large-scale wastewater treatment. 2. During the application of this technical solution, by setting up a stirring mechanism and a stable support mechanism, the air flotation aeration pipe can be rotated through the main air flotation pipe during use. This, together with the air flotation nozzle, aerates and stirs the sewage, allowing the bubbles and suspended solids to mix thoroughly. The support mechanism ensures the stable operation of the air flotation tank, thereby improving the bubble adhesion efficiency, enhancing the air flotation effect, and ensuring stable equipment operation. This solves the problems in the existing technology where the lack of an effective stirring and uniform aeration structure leads to poor air flotation effect, and the equipment is prone to shaking during operation, affecting the separation effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model from below; Figure 3 This is a top view of the structure of this utility model; Figure 4 This is a schematic diagram of the internal structure of the air flotation box of this utility model; Figure 5 This is a schematic diagram of the stirring mechanism of this utility model; Figure 6 This utility model Figure 2 A magnified structural diagram at point A.

[0013] In the diagram: 1. Flotation tank; 2. Agitator; 21. Flotation main pipe; 22. Air supply module; 221. Rotary joint; 222. Mounting block; 223. Air pump; 224. Gear ring; 23. Side agitator; 24. Flotation aeration pipe; 25. Flotation nozzle; 26. Ring pipe; 3. Slag discharge mechanism; 31. Top collection hopper; 32. Synchronous pulley; 33. Collection frame; 34. Conveying auger; 35. Slag discharge pipe; 36. Connecting flange; 37. Wastewater inlet pipe; 4. Drive mechanism; 41. Side frame; 42. External frame; 43. Drive gear; 44. Drive motor; 5. Mounting frame; 6. Support leg; 7. Support base. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Example 1 A high-efficiency air flotation separation device for wastewater recycling includes an air flotation tank 1, an agitation mechanism 2 inside the air flotation tank 1, a slag discharge mechanism 3 fixedly installed on the top of the air flotation tank 1, and a drive mechanism 4 fixedly installed on one side of the air flotation tank 1. The output end of the drive mechanism 4 is connected to the agitation mechanism 2 and the slag discharge mechanism 3 respectively. The drive mechanism 4 includes a side frame 41 and an outer frame 42. The side frame 41 is fixedly installed on the lower side of the flotation tank 1. A drive gear 43 is fixedly installed on the inner side of the side frame 41, and the drive gear 43 is connected to the stirring mechanism 2. The outer frame 42 is fixedly installed on the lower outer side of the flotation tank 1 and is located outside the side frame 41. A drive motor 44 is fixedly installed on the outer side of the outer frame 42. The output end of the drive motor 44 passes through the outer frame 42 and is fixedly connected to the outer side of the drive gear 43. During the application of this device, by setting up the flotation tank 1, the stirring mechanism 2, the slag discharge mechanism 3, and the drive mechanism 4, the stirring mechanism 2 and the slag discharge mechanism 3 can be driven simultaneously by the drive mechanism 4, without the need to equip them with separate power sources. When in use, first start the drive motor 44 on the outer side of the outer frame 42 in the drive mechanism 4. The output end of the drive motor 44 passes through the outer frame 42 and is fixed to the drive gear 43 on the inner side of the side frame 41. The drive mechanism 4 connects to the drive gear 43, which rotates and is connected to the stirring mechanism 2. The drive gear 43 synchronously drives the stirring mechanism 2 to operate inside the flotation tank 1, stirring the wastewater and creating conditions for subsequent mixing of bubbles and suspended solids. Simultaneously, the output of the drive mechanism 4 is also connected to the slag discharge mechanism 3. As the drive motor 44 drives the drive gear 43, it also drives the slag discharge mechanism 3 to collect and discharge the slag at the top of the flotation tank 1. This design allows the stirring mechanism 2 and the slag discharge mechanism 3 to share a single drive source, simplifying the overall equipment structure, reducing the number of parts, and ensuring synchronized operation. This avoids imbalances in stirring and slag discharge caused by asynchronous power. Compared to existing equipment that requires separate drives for stirring and slag discharge, this design saves energy, reduces operating and maintenance costs, and improves the continuity and efficiency of the flotation separation process.

[0016] Combination Figures 1-4As shown, the slag discharge mechanism 3 includes a top centralized hopper 31 and a synchronous pulley 32. The top centralized hopper 31 is fixedly installed on the top of the flotation tank 1. A centralized frame 33 is fixedly installed on the top of the top centralized hopper 31. A conveying auger 34 is rotatably connected inside the centralized frame 33. A slag discharge pipe 35 is fixedly installed on the lower side of one side of the centralized frame 33. The synchronous pulley 32 is fixedly installed on the output end of the drive motor 44. The output end of the drive motor 44 passes through the synchronous pulley 32 and is fixedly connected to the outside of the drive gear 43. The synchronous pulley 32 is also rotatably connected to the side of the centralized frame 33 near the drive motor 44. The two synchronous pulleys 32 are connected by a synchronous belt drive. The synchronous pulley 32 at the upper end is connected to the conveying auger 34 through a coupling. The overall cross-sectional shape of the top centralized hopper 31 is an isosceles trapezoid. A sewage inlet pipe 37 is fixedly installed in the middle of one side of the top centralized hopper 31.

[0017] In the above-described embodiments of this application, during the application of this device, the slag discharge mechanism 3 (including a top centralized hopper 31, a synchronous wheel 32, a conveying auger 34, etc.) cooperates with the drive mechanism 4 to simultaneously realize sewage input, slag collection and discharge during use. During use, the sewage to be treated enters the top centralized hopper 31 through the sewage inlet pipe 37 in the middle of one side of the top centralized hopper 31. The overall cross-section of the top centralized hopper 31 is an isosceles trapezoid, which can guide the sewage to flow evenly into the air flotation tank 1 and avoid sewage accumulation. After starting the drive motor 44 of the drive mechanism 4, the output end of the drive motor 44 passes through the synchronous wheel 32 and is fixedly connected to the drive gear 43. On the one hand, it drives the drive gear 43 to rotate to drive the stirring mechanism 2 to operate, and on the other hand, it drives the lower synchronous wheel 32 to rotate. Through the synchronous belt transmission, the upper end of one side of the centralized frame 33 is synchronously driven. The wheel 32 rotates accordingly, and the upper synchronous wheel 32 drives the conveying auger 34 inside the centralized frame 33 to rotate through the coupling. The scum generated in the flotation tank 1 floats to the top centralized hopper 31 and enters the centralized frame 33. The conveying auger 34 transports the scum to the scum discharge pipe 35 at the lower end of one side of the centralized frame 33, and finally discharges it from the equipment through the scum discharge pipe 35. This design allows the scum discharge mechanism 3 to operate with the power of the drive motor 44 without the need for an additional power source. At the same time, the isosceles trapezoidal top centralized hopper 31 ensures uniform sewage input and efficient scum collection. The cooperation between the conveying auger 34 and the scum discharge pipe 35 can stably discharge scum. Compared with the traditional method of manually cleaning scum, it not only reduces manual intervention, but also ensures the continuity of scum collection and discharge, avoids scum accumulation affecting the flotation effect, and further improves the stability and efficiency of equipment operation.

[0018] Example 2 Combination Figures 1-5As shown, the stirring mechanism 2 includes an air flotation main pipe 21 and an air supply module 22. The air flotation main pipe 21 is rotatably connected to the lower end of the air flotation tank 1. Side agitators 23 are fixedly installed at equal intervals on the outer surface of the air flotation main pipe 21. Air flotation aeration pipes 24 are fixedly installed on the outer side of the side agitators 23. Air flotation nozzles 25 are fixedly installed at equal intervals in a linear arrangement on the outer side of the air flotation aeration pipes 24. The air supply module 22 is fixedly installed on the lower outer side of the air flotation tank 1. The output end of the air supply module 22 is connected to the input end of the air flotation main pipe 21. An annular pipe 26 is fixedly installed on one side of the air flotation main pipe 21. The inner side of the annular pipe 26 is connected to the air flotation main pipe 21. The output end of the annular pipe 26 is connected to the input end of each air flotation aeration pipe 24. The air supply module 22 includes a rotary joint 221 and a mounting block 222. The head 221 is rotatably connected to the lower end of one side of the flotation tank 1. The input end of the rotary joint 221 is connected to the main flotation pipe 21. The mounting block 222 is fixedly installed on the lower end of the side of the flotation tank 1 near the side frame 41. An air pump 223 is fixedly installed on the outside of the mounting block 222. The output end of the air pump 223 is connected to the input end of the rotary joint 221. A toothed ring 224 is fixedly connected to the outer surface of the rotary joint 221. The toothed ring 224 and the drive gear 43 are meshed. Mounting brackets 5 are fixedly installed on the upper ends of both sides of the flotation tank 1. Support legs 6 are fixedly installed on both ends of the mounting brackets 5. Support bases 7 are fixedly installed on the bottom of the support legs 6. A connecting flange 36 is fixedly installed on the input end of the sewage inlet pipe 37. A connecting flange 36 is also fixedly installed on the input end of the sewage inlet pipe 37.

[0019] The technical solution described in the above-described embodiments of this application, during the application of this device, by setting up a stirring mechanism 2, an air supply module 22, a support structure and a connecting flange 36, in conjunction with the original drive mechanism 4 and slag discharge mechanism 3, enables stable sewage aeration and stirring, scum collection and equipment stable support during use. In use, the sewage inlet pipe 37 is first connected to an external sewage pipe via the connecting flange 36 at the inlet end. The sewage to be treated enters the top collection hopper 31 through the sewage inlet pipe 37, and then flows into the flotation tank 1. After starting the drive motor 44, the drive motor 44 drives the drive gear 43 to rotate. The drive gear 43 meshes with the toothed ring 224 on the outer surface of the rotary joint 221, thereby driving the rotary joint 221 and the flotation main pipe 21 to rotate synchronously. Simultaneously, the air pump 223 of the air supply module 22 is started. The gas generated by the air pump 223 is delivered to the flotation main pipe 21 through the rotary joint 221, and then distributed through the annular pipe 26. The gas is distributed to each flotation aeration pipe 24 and finally sprayed into the wastewater in the form of bubbles from the flotation nozzle 25. When the flotation main pipe 21 rotates, it also drives the side agitator 23 to rotate synchronously with the flotation aeration pipe 24, stirring the wastewater and promoting the full mixing of bubbles and suspended solids. The scum generated during the flotation process floats to the top collection hopper 31 and is discharged through the scum discharge pipe 35 by the conveying auger 34 of the scum discharge mechanism 3. The mounting brackets 5, support legs 6 and support base 7 on both sides of the upper end of the flotation tank 1 cooperate to provide stable support for the entire equipment and prevent shaking during operation. In this design, the stirring and aeration are carried out simultaneously to improve the flotation effect. The rotary joint 221 ensures that the gas delivery is not affected by the rotation of the flotation main pipe 21. The support structure ensures the stable operation of the equipment. The connecting flange 36 facilitates pipe docking. Moreover, the coordinated operation of each mechanism does not require an additional power source. Compared with traditional equipment, it reduces energy consumption and failure points and improves the overall operating efficiency and convenience.

[0020] The working principle and advantages of this utility model are as follows: During the application of this device, the device is first installed and fixed. The upper ends of both sides of the air flotation tank 1 are provided with mounting frames 5, and the two ends of the mounting frames 5 are fixed with support legs 6. The bottom of the support legs 6 is equipped with a support base 7. The support base 7 is placed in the designated working area. Through the cooperation of the support legs 6 and the mounting frames 5, the air flotation tank 1 can be stably supported, so that the air flotation tank 1 remains stable in subsequent operation and avoids the air flotation separation effect due to equipment shaking. Next, the sewage input is prepared. The middle of one side of the top centralized hopper 31 is provided with a sewage inlet pipe 37. The inlet end of the sewage inlet pipe 37 is equipped with a connecting flange 36. The external sewage conveying pipe can be connected to the sewage inlet pipe 37 through the connecting flange 36. The sewage to be treated is transported to the top centralized hopper 31 through the sewage inlet pipe 37. The overall cross section of the top centralized hopper 31 is an isosceles trapezoid. This structure can guide the sewage to flow evenly into the air flotation tank 1, avoid sewage accumulation, and thus ensure that the sewage enters the air flotation tank 1 stably. Then, the drive mechanism 4 and the stirring mechanism 2 are activated. The drive mechanism 4 includes a side frame 41 and an outer frame 42. A drive motor 44 is fixed to the outside of the outer frame 42. When the drive motor 44 is activated, its output end passes through the outer frame 42 and is fixedly connected to the drive gear 43 inside the side frame 41, driving the drive gear 43 to rotate. The stirring mechanism 2 includes an air flotation main pipe 21, an air supply module 22, a side agitator 23, an air flotation aeration pipe 24, and air flotation nozzles 25. The air flotation main pipe 21 is rotatably connected to the lower end of the air flotation box 1. An annular pipe 26 is fixed to one side of the air flotation main pipe 21, and the annular pipe 26 communicates with each air flotation aeration pipe 24. The side agitator 23 is fixed to the outer surface of the air flotation main pipe 21. The air flotation aeration pipes 24 are fixed to the outside of the side agitator 23. The air flotation nozzles 25 are arranged at equal intervals on the outside of the air flotation aeration pipes 24. The air supply module 22 includes a rotary joint 221, a mounting block 222, and... Air pump 223 and rotary joint 221 are rotatably connected to the lower end of one side of the air flotation tank 1. A toothed ring 224 is fixed on its outer surface. The toothed ring 224 meshes with the drive gear 43. Air pump 223 is fixed on the outside of mounting block 222. The output end of air pump 223 is connected to the input end of rotary joint 221. When drive gear 43 rotates, it drives toothed ring 224, rotary joint 221 and air flotation main pipe 21 to rotate synchronously. At the same time, air pump 223 is started. The high-pressure gas generated by air pump 223 is delivered to air flotation main pipe 21 through rotary joint 221, and then distributed to each air flotation aeration pipe 24 through annular pipe 26. Finally, it is sprayed into the sewage in the form of microbubbles through air flotation nozzle 25. The rotation of air flotation main pipe 21 also drives side agitator 23 and air flotation aeration pipe 24 to rotate synchronously, stirring the sewage so that microbubbles and suspended particles can fully contact and adhere, thereby forming a mixture with a density less than water. Then, the slag discharge mechanism 3 starts operating. The slag discharge mechanism 3 includes a top concentrator 31, a concentrator frame 33, a conveying auger 34, a synchronous pulley 32, and a synchronous belt. The output end of the drive motor 44 is fixed with a synchronous pulley 32. The concentrator frame 33 also has a synchronous pulley 32 on the side near the drive motor 44. The two synchronous pulleys 32 are connected by a synchronous belt. When the drive motor 44 rotates, it drives the lower synchronous pulley 32 to rotate, which in turn drives the upper synchronous pulley 32 to rotate via the synchronous belt. The upper synchronous pulley 32 is connected to the conveying auger 34 inside the concentrator frame 33 through a coupling, thereby driving the conveying auger 34 to rotate. The air flotation tank 1 is filled with air. The suspended solids mixture in the flotation tank rises to the surface under the action of buoyancy. Since the top collection bucket 31 is set in an isosceles trapezoid, when the scum floats, the floating scum will float to the inside of the collection frame 33. At this time, the scum can be transported to one side of the collection frame 33 by the conveying auger 34. The lower end of one side of the collection frame 33 is provided with a scum discharge pipe 35. The scum is discharged to the outside of the equipment through the scum discharge pipe 35, thus completing the collection and discharge of scum. As the stirring mechanism 2 continues to aerate and stir and the scum discharge mechanism 3 continues to discharge scum, the sewage inside the flotation tank 1 gradually completes the solid-liquid separation. The treated clean water can be discharged through the pre-set drainage structure at the bottom of the flotation tank 1. This device provides power to both the stirring mechanism 2 and the slag discharge mechanism 3 simultaneously via a drive motor 44, eliminating the need for multiple drive sources, simplifying the equipment structure, reducing energy consumption, and ensuring coordinated stirring and slag discharge actions. The conveying auger 34 and slag discharge pipe 35 of the slag discharge mechanism 3 work together to achieve continuous and uninterrupted discharge of scum, eliminating the need for frequent manual cleaning of collection components, reducing equipment downtime, and improving the efficiency of large-scale wastewater treatment. In the stirring mechanism 2, the design of the flotation main pipe 21 driving the flotation aeration pipe 24, combined with the evenly spaced flotation nozzles 25, ensures thorough mixing of bubbles with wastewater and suspended particles, improving bubble adhesion efficiency and enhancing the flotation effect. The cooperation of the support legs 6, mounting bracket 5, and support base 7 ensures stable operation of the flotation tank 1. The connecting flange 36 simplifies the external pipeline connection process, and the rotary joint 221 ensures stable aeration during the rotation of the flotation main pipe 21. These designs collectively improve the device's operational performance and ease of use, better meeting the needs of wastewater recycling and treatment. In this technical solution, the controller is an STM32F103 series microcontroller, which is installed on the outside of the air flotation box 1 near the outer frame 42. The controller is equipped with a 128×64 resolution OLED display screen to display the equipment operating parameters. Among the main electronic components, the drive motor 44 is a 400W-750W three-phase asynchronous motor, model Y2-90L-4. A gearbox reducer of model RV30-10 with a reduction ratio of 1:10 is installed on the motor output shaft. At the same time, a 1024-line incremental encoder (model E6B2-CWZ6C) is equipped on the motor shaft. The encoder is connected to the PA0 and PA1 pins of the controller through the A and B phase pulse lines to realize the detection of motor rotation angle and speed regulation. The motor is powered by 380V three-phase AC power converted by a frequency converter of model S7-200. The control terminal of the frequency converter is connected to the PB0 pin of the controller. The air pump 223 is a 220V single-phase scroll air pump 223, model RB-81D-1, with a power of 750W-1100W. The power supply circuit of the air pump 223 is connected in series with a solid-state relay of model SSR-25DA. The control terminal of the solid-state relay is connected to the PB1 pin of the controller. Regarding sensors, an immersion-type liquid level sensor (range 0-2m, output 4-20mA analog signal) is installed inside the flotation tank 1. Its signal terminal is connected to the ADC1 pin of the controller to detect the sewage level. A diffuse reflection photoelectric sensor (model E3F-DS30C4) is installed inside the centralized frame 33. Its signal terminal is connected to the PA2 pin of the controller to detect the accumulation of scum. The circuit system is powered by an external 220V AC power supply, which is converted to 24V DC voltage by a TDK-LambdaRS-150-24 switching power supply to power the controller, sensors, encoder, and solid-state relay. The controller controls the frequency converter and solid-state relay through I / O pins to start, stop, and speed adjust the drive motor 44 and air pump 223. At the same time, it receives feedback signals from the encoder, liquid level sensor, and photoelectric sensor to form a closed-loop control, ensuring that the equipment automatically adjusts its operating status according to the sewage level and scum volume. The display screen is connected to the controller's PB8 and PB9 pins via the I2C bus to display parameters such as motor speed, air pump 223 pressure, and sewage level in real time. The scope of protection of this application does not involve improvements to the electronic components of the device or equipment. Therefore, the working principles of each electronic component are not described in detail here. The electronic components in this application are all conventional electronic components used in the prior art. They are all conventional technical means in the prior art, and the application of the prior art is very mature. Therefore, they will not be elaborated here.

[0021] Of course, there may be other implementations of this utility model. Based on this implementation, other implementations obtained by those skilled in the art without any creative effort are all within the scope of protection of this utility model.

Claims

1. A high-efficiency air flotation separation device for wastewater recycling, characterized in that, It includes an air flotation tank (1), an agitation mechanism (2) is provided inside the air flotation tank (1), a slag discharge mechanism (3) is fixedly installed on the top of the air flotation tank (1), and a drive mechanism (4) is fixedly installed on one side of the air flotation tank (1). The output end of the drive mechanism (4) is connected to the agitation mechanism (2) and the slag discharge mechanism (3) respectively. The drive mechanism (4) includes a side frame (41) and an outer frame (42). The side frame (41) is fixedly installed on the lower side of the air flotation tank (1). A drive gear (43) is fixedly installed on the inner side of the side frame (41). The drive gear (43) is connected to the stirring mechanism (2) in a transmission. The outer frame (42) is fixedly installed on the lower outer side of the air flotation tank (1) and located on the outer side of the side frame (41). A drive motor (44) is fixedly installed on the outer side of the outer frame (42). The output end of the drive motor (44) passes through the outer frame (42) and is fixedly connected to the outer side of the drive gear (43). The stirring mechanism (2) includes an air flotation main pipe (21) and an air supply module (22). The air flotation main pipe (21) is rotatably connected to the lower end of the air flotation box (1). Side stirring frames (23) are fixedly installed at equal intervals on the outer surface of the air flotation main pipe (21). Air flotation aeration pipes (24) are fixedly installed on the outer side of the side stirring frames (23). Air flotation nozzles (25) are fixedly installed at equal intervals in a linear arrangement on the outer side of the air flotation aeration pipes (24). The air supply module (22) is fixedly installed at the lower end of the outer side of the air flotation box (1). The output end of the air supply module (22) is connected to the input end of the air flotation main pipe (21). An annular pipe (26) is fixedly installed on one side of the air flotation main pipe (21). The inner side of the annular pipe (26) is connected to the air flotation main pipe (21). The output end of the annular pipe (26) is connected to the input end of each air flotation aeration pipe (24).

2. The high-efficiency air flotation separation equipment for wastewater recycling according to claim 1, characterized in that, The slag discharge mechanism (3) includes a top concentrator (31) and a synchronous wheel (32). The top concentrator (31) is fixedly installed on the top of the air flotation tank (1). A concentrator frame (33) is fixedly installed on the top of the top concentrator (31). A conveying auger (34) is rotatably connected inside the concentrator frame (33). A slag discharge pipe (35) is fixedly installed on the lower side of one side of the concentrator frame (33). The synchronous wheel (32) is fixedly installed at the output end of the drive motor (44). The output end of the drive motor (44) passes through the synchronous wheel (32) and is fixedly connected to the outside of the drive gear (43). The synchronous wheel (32) is also rotatably connected to the side of the concentrator frame (33) near the drive motor (44). The two synchronous wheels (32) are connected by a synchronous belt drive. The synchronous wheel (32) at the upper end is connected to the conveying auger (34) through a coupling.

3. The high-efficiency air flotation separation equipment for wastewater recycling according to claim 2, characterized in that, The overall cross-sectional shape of the top centralized hopper (31) is an isosceles trapezoid, and a sewage inlet pipe (37) is fixedly installed on the middle of one side of the top centralized hopper (31).

4. The high-efficiency air flotation separation equipment for wastewater recycling according to claim 3, characterized in that, The air supply module (22) includes a rotary joint (221) and a mounting block (222). The rotary joint (221) is rotatably connected to the lower end of one side of the air flotation box (1). The input end of the rotary joint (221) is connected to the air flotation main pipe (21). The mounting block (222) is fixedly installed on the lower end of one side of the air flotation box (1) near the side frame (41). An air pump (223) is fixedly installed on the outside of the mounting block (222). The output end of the air pump (223) is connected to the input end of the rotary joint (221). A toothed ring (224) is fixedly connected to the outer surface of the rotary joint (221). The toothed ring (224) is meshed with the drive gear (43).

5. The high-efficiency air flotation separation equipment for wastewater recycling according to claim 4, characterized in that, The upper ends of both sides of the air flotation box (1) are fixedly installed with mounting brackets (5), and the two ends of the mounting brackets (5) are fixedly installed with support legs (6). The bottom of the support legs (6) is fixedly installed with a support base (7).

6. The high-efficiency air flotation separation equipment for wastewater recycling according to claim 5, characterized in that, A connecting flange (36) is fixedly installed at the input end of the sewage inlet pipe (37).

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