An adaptive negative pressure floatation sewage treatment device

Abstract

The application relates to the technical field of sewage treatment, and particularly discloses a self-adaptive negative pressure floatation sewage treatment device, which comprises a rotating part and a scraping part, the rotating part is rotationally connected to a floatation tank, the scraping part comprises a connecting part, a scraper, a scraping net, an elastic part one and a blocking part, the connecting part is connected to the rotating part, the scraper is connected to the connecting part, the scraping net is rotationally connected to the scraper, the scraping net can be extended into sewage in the floatation tank and scrape flocculation in the sewage, the elastic part one is connected between the scraping net and the scraper, the blocking part is connected in the floatation tank, the scraping net can be turned over when passing through the blocking part, so that the flocculation is separated from the scraping net, after the scraping net is separated from the blocking part, the scraping net is reset by the elastic part one, and the flocculation is continuously scraped by the scraping net; the self-adaptive negative pressure floatation sewage treatment device can clean the flocculation in the sewage, so that the influence of the flocculation on the air floatation efficiency of the sewage is avoided.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, and specifically to an adaptive negative pressure flotation wastewater treatment device. Background Technology

[0002] Adaptive negative pressure flotation wastewater treatment is a highly efficient water treatment technology that combines physical and chemical principles. Its core lies in separating pollutants from water through a negative pressure environment generated by specific equipment (such as a flotation machine). Wastewater first passes through a mechanical screen to remove larger solid impurities (such as branches, plastic bags, etc.) to prevent clogging of subsequent equipment. After the wastewater enters the flotation machine, air is introduced into the wastewater to generate a large number of tiny bubbles. At the same time, stirring ensures that the bubbles and wastewater come into full contact, promoting the adhesion of pollutants. During this process, hydrophobic particles (such as grease and some organic matter) are more likely to adhere to the bubbles due to surface tension. Under negative pressure, the bubbles carrying pollutants quickly float to the surface, forming a foam layer (i.e., scum), while hydrophilic particles remain in the water and are not adsorbed. Finally, the foam layer is cleaned by a scraper.

[0003] Chinese patent document CN220745465U discloses a slurry mixing device and flotation machine, including a mixing tank. A motor is fixedly connected to the upper side of the mixing tank, and a mixing shaft is rotatably connected to the inner side of the mixing tank. One end of the mixing shaft is fixedly connected to the output shaft of the motor. A dispersion disc is fixedly connected to the upper end of the mixing shaft. The dispersion disc includes a main disc body fixed on the mixing shaft. A dispersion outlet is opened in the middle of the main disc body around the mixing shaft. A guide baffle is provided on the inner side of the main disc body. The guide baffle is spirally installed inside the main disc body. The cross-sectional shape of the main disc body is set as a bucket shape, and the dispersion outlet is located at the bottom of the main disc body, which facilitates the collection and dispersion of mineral liquid and reagents during use. A mixing impeller is provided at the lower end of the mixing shaft for easy mixing during use. An inlet is opened on the upper surface of the mixing tank, a outlet is provided at the upper part of the outer surface of the mixing tank, and a cleaning port is provided at the lower part of the outer surface of the mixing tank for easy addition of materials and discharge of products during use.

[0004] In use, the slurry and reagents are heated by adding them through the inlet. The motor drives the stirring shaft to rotate, which in turn drives the dispersion disc to rotate. The rotation of the main disc and guide baffle causes the slurry and materials to flow and be thrown out from the dispersion outlet. At the same time, the stirring shaft drives the stirring impeller to rotate for stirring. The liquid is dispersed in a spiral shape by the dispersion port on the fixed frame, which accelerates the mixing of the slurry and reagents and thus speeds up the reaction for flotation. The flotation foam is blocked by the dispersion disc and discharged from the discharge port for collection. The remaining impurities are discharged through the cleaning port.

[0005] However, the above-mentioned patent documents also have the following shortcomings: under the action of stirring and mixing, the particles will collide frequently. In addition, the natural organic matter, clay and other components in the wastewater will help to bind together, eventually forming flocs with a porous structure. If the flocs are excessive, dense or too large, they will increase the viscosity of the system and the fluid resistance, causing the bubbles to be blocked from rising or even to break. At the same time, the excessively heavy flocs may detach from the bubbles and settle, destroying the foam stability and causing the flotation efficiency to decrease. Summary of the Invention

[0006] This invention provides an adaptive negative pressure flotation wastewater treatment device, which aims to solve the problems in related technologies where excessive, dense, or large flocs increase the viscosity and fluid resistance of the system, causing bubbles to be obstructed from rising or even rupture. At the same time, excessively heavy flocs may detach from the bubbles and settle, damaging foam stability and causing a decrease in flotation efficiency.

[0007] The adaptive negative pressure flotation wastewater treatment device of the present invention includes a flotation cell and a negative pressure stirring mechanism, and further includes a scraping mechanism. The scraping mechanism includes a rotating part and a scraping component. The rotating part is rotatably connected to the flotation cell. The scraping component includes a connecting part, a scraper, a scraper screen, an elastic part, and a blocking part. The connecting part is connected to the rotating part, the scraper is connected to the connecting part, and the scraper screen is rotatably connected to the scraper. The scraper screen can extend into the wastewater in the flotation cell and scrape the flocculent matter in the wastewater. The elastic part is connected between the scraper screen and the scraper. The blocking part is connected inside the flotation cell. When the scraper screen passes through the blocking part, it can flip over to separate the flocculent matter from the scraper screen. After the scraper screen separates from the blocking part, the elastic part drives the scraper screen to reset and continues to scrape the flocculent matter through the scraper screen.

[0008] Beneficial effects: During wastewater treatment, a negative pressure is generated by a negative pressure stirring mechanism, which transports wastewater and air into the flotation tank and stirs them. After the bubbles rise to the surface of the wastewater, a bubble layer is formed. Then, the rotating part rotates and drives the scraper to move along a circular trajectory. At this time, the scraper scrapes the bubble layer on the surface of the wastewater, while the scraper extends into the wastewater to scrape the flocculent matter. When the scraper passes the blocking part, it is blocked by the blocking part, which causes the scraper to flip and twist the elastic part, thereby separating the flocculent matter from the scraper. After the scraper passes the blocking part, the elastic force of the elastic part pushes the scraper back to its original position, and the scraper scrapes the flocculent matter again to prevent the flocculent matter from adhering tightly to the scraper. This cleans the bubble layer and flocculent matter, so as to avoid the flocculent matter affecting the flotation efficiency of the wastewater.

[0009] Preferably, the scraping mechanism further includes a second drive source and a second transmission component, wherein the second drive source is connected to the flotation cell and the second transmission component is connected between the second drive source and the rotating part.

[0010] Its effect is that starting the second drive source can drive the second transmission component to run, and the second transmission component can drive the rotating part to rotate, thereby providing power for the rotation of the rotating part.

[0011] Preferably, the second transmission component includes a transmission belt and two transmission wheels, the two transmission wheels being respectively connected to the second drive source and the rotating part, and the transmission belt being connected between the two transmission wheels.

[0012] Its effect is that the second drive source can drive one of the transmission wheels to rotate, thereby driving the transmission belt and the transmission between the two transmission wheels, thus driving the rotating part to rotate at a stable and controllable speed.

[0013] Preferably, the scraping mechanism further includes a cleaning component connected to the scraping component.

[0014] Its effect is that the cleaning component can clean the scraper to prevent some foam and flocculent material from being re-conducted into the flotation cell as the scraper moves along the circular trajectory.

[0015] Preferably, the cleaning component includes a guide rail, a cleaning frame, an elastic part two, and a roller. The guide rail is connected inside the flotation cell, the roller is rotatably connected to the cleaning frame, the cleaning frame is sleeved on the scraper, and the elastic part two is connected between the cleaning frame and the rotating part.

[0016] Its effect is that the guide rail can block the roller, so that the cleaning frame and the scraper are misaligned. At the same time, the second elastic part is compressed. After the scraper scrapes off the foam layer on the surface of the sewage and discharges it outward, the roller separates from the guide rail. At this time, the cleaning frame can be pushed to reset by the elastic force of the second elastic part. The cleaning frame cleans the foam on the scraper to prevent the foam from being carried back into the flotation tank.

[0017] Preferably, a brush is connected inside the cleaning frame.

[0018] Its effect is that the brush can clean the scraper when the cleaning frame is reset, so as to prevent the lint remaining on the scraper from being carried back into the sewage.

[0019] Preferably, the guide rail includes an arc segment and a horizontal segment.

[0020] Preferably, the elastic part is a torsion spring, used to drive the scraper to reset.

[0021] Its effect is that the elastic part can be twisted when the scraper is blocked and flipped, and after the scraper is no longer blocked, the elastic part drives the scraper to return to its original position.

[0022] Preferably, the negative pressure stirring mechanism includes a mixing support tube, a rotating shaft, an impeller, a first conveying pipe, a second conveying pipe, and a container. The container is connected to the flotation cell, the mixing support tube is connected inside the flotation cell, the rotating shaft is rotatably connected inside the mixing support tube, the impeller is connected to the bottom end of the rotating shaft, and both the first and second conveying pipes are connected to the mixing support tube. The end of the first conveying pipe away from the mixing support tube is connected to the container.

[0023] Its effect is as follows: when the negative pressure stirring mechanism is activated, the rotating shaft drives the impeller to rotate, thereby generating negative pressure. This allows the wastewater in the container to be transported to the flotation cell through the first conveying pipe, and air to be transported to the wastewater in the flotation cell through the second conveying pipe. At the same time, the impeller stirs the wastewater, and the stirring allows the air bubbles to come into full contact with the wastewater, promoting the adhesion of pollutants. During this process, hydrophobic particles are more likely to adhere to the air bubbles due to surface tension. Under negative pressure, the air bubbles carrying pollutants quickly rise to the liquid surface and form a foam layer.

[0024] Preferably, the rotating shaft is coaxially arranged with the mixing support tube.

[0025] The beneficial effects of this invention are:

[0026] 1. Driven by the second drive source, the second transmission component is driven to move, so that the rotating part drives the scraping component and the cleaning component to move along a circular trajectory. When the scraping component moves along the circular trajectory, the scraper inside the scraping component scrapes and cleans the foam layer on the surface of the sewage. At the same time, the scraper screen extends into the sewage to scrape flocculent matter. When the scraper screen passes the blocking part, the scraper screen is blocked by the blocking part and rotates and twists the elastic part one, so that the flocculent matter is separated from the scraper screen. After the scraper screen passes the blocking part, the elastic part one drives the scraper screen to reset and the scraper screen continues to move along the circular trajectory, thereby scraping flocculent matter again, scraping out the flocculent matter in the sewage and discharging it out from the discharge port, so as to avoid the flocculent matter affecting the flotation efficiency of the sewage.

[0027] 2. When the cleaning frame passes the guide rail, the rollers on the cleaning frame first contact the arc-shaped section on the guide rail, so that the rollers roll within the arc-shaped section. After the rollers move to the horizontal section, the horizontal section blocks the rollers, causing the cleaning frame and scraper to be misaligned and compressing the second elastic part. At this time, the scraper extends from the cleaning frame and scrapes the foam layer on the surface of the sewage. After scraping, the scraper continues to move along the circular trajectory, so that the scraper and the scraper screen respectively discharge the foam and flocculent material from the discharge port. Then the rollers separate from the horizontal section on the guide rail. At this time, the cleaning frame is pushed back to its original position by the elastic force of the second elastic part. The cleaning frame cleans the foam on the scraper screen, and the brush inside the cleaning frame cleans the scraper screen to prevent some foam and flocculent material from being transferred back to the flotation cell as the scraper moves along the circular trajectory. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the main structure of the present invention.

[0029] Figure 2 This is a front-view stereoscopic structural diagram of the present invention.

[0030] Figure 3 This is a side view of the negative pressure stirring mechanism of the present invention.

[0031] Figure 4 This is a three-dimensional structural diagram of the scraping mechanism of the present invention.

[0032] Figure 5 This is a side view cross-sectional structural schematic diagram of the scraping mechanism of the present invention.

[0033] Figure 6 This is a side view cross-sectional structural diagram of the flotation cell of the present invention.

[0034] Figure label:

[0035] 1. Flotation cell; 11. Discharge port; 2. Negative pressure stirring mechanism; 21. Drive source one; 22. Transmission component one; 23. Mixing support pipe; 24. Rotating shaft; 25. Impeller; 26. Conveying pipe one; 27. Conveying pipe two; 28. Container; 3. Scraping mechanism; 31. Drive source two; 32. Transmission component two; 33. Rotating part; 34. Scraping component; 341. Connecting part; 342. Scraper; 343. Scraping screen; 344. Elastic part one; 345. Blocking part; 35. Cleaning component; 351. Guide rail; 352. Cleaning frame; 353. Elastic part two; 354. Brush; 355. Roller. Detailed Implementation

[0036] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0037] like Figures 1 to 6 As shown, the adaptive negative pressure flotation wastewater treatment device of the present invention includes a flotation tank 1, a negative pressure stirring mechanism 2, and a scraping mechanism 3. The negative pressure stirring mechanism 2 is connected to the flotation tank 1. The negative pressure stirring mechanism 2 can stir the wastewater and simultaneously deliver air into the wastewater to form small bubbles. When the small bubbles rise, a foam layer is formed on the surface of the wastewater, thereby cleaning the wastewater. The flotation tank 1 is provided with a discharge port 11. The scraping mechanism 3 is connected to the discharge port 11 on the flotation tank 1. The scraping mechanism 3 can scrape and clean the foam layer and flocculent matter in the wastewater.

[0038] When treating wastewater, the wastewater is first transported to the flotation tank 1. Then, the negative pressure stirring mechanism 2 is started to stir the wastewater. At the same time, air is delivered into the wastewater under negative pressure. After the air enters the wastewater, small bubbles are generated. Through stirring, the bubbles are brought into full contact with the wastewater, promoting the adhesion of pollutants. During this process, hydrophobic particles are more likely to adhere to the bubbles due to surface tension. Under negative pressure, the bubbles carrying pollutants quickly float to the surface of the liquid, forming a foam layer. Finally, the scraping mechanism 3 is started to scrape the foam layer and the flocculent material formed in the wastewater, so that the foam layer and flocculent material are discharged from the discharge port 11.

[0039] like Figures 1 to 3 As shown, the negative pressure stirring mechanism 2 includes a drive source 21, a transmission component 22, a mixing support tube 23, a rotating shaft 24, an impeller 25, a first conveying pipe 26, a second conveying pipe 27, and a container 28. The container 28 is connected to the flotation cell 1 and is used to hold wastewater. The mixing support tube 23 is connected inside the flotation cell 1. The rotating shaft 24 is rotatably connected inside the mixing support tube 23 and is coaxially arranged with the mixing support tube 23. The impeller 25 is connected to the bottom end of the rotating shaft 24, and the rotating shaft 24 can drive the impeller. The impeller 25 rotates, thereby creating a negative pressure to facilitate the delivery of air into the wastewater. Both the first delivery pipe 26 and the second delivery pipe 27 are connected to the mixing support pipe 23. The end of the first delivery pipe 26 away from the mixing support pipe 23 is connected to the container 28 so that the wastewater in the container 28 can be delivered to the flotation cell 1 through the first delivery pipe 26. After the impeller 25 rotates and generates a negative pressure, air can be delivered into the wastewater contained in the flotation cell 1 through the second delivery pipe 27 so as to form small bubbles in the wastewater.

[0040] The drive source 21 is a motor, and the transmission component 22 is connected between the output end of the drive source 21 and the top end of the rotating shaft 24. The transmission component 22 includes a transmission belt and two transmission wheels. The two transmission wheels are respectively connected to the output end of the drive source 21 and the top end of the rotating shaft 24. The transmission belt drives the transmission between the two transmission wheels. Starting the drive source 21 can drive the transmission between the transmission belt and the two transmission wheels, so as to make the transmission wheel connected to the rotating shaft 24 rotate, thereby providing power for the rotation of the rotating shaft 24.

[0041] When treating wastewater, the drive source 21 is activated to drive the transmission component 22. When the transmission component 22 is running, it drives the rotating shaft 24 to rotate. When the rotating shaft 24 rotates, it drives the impeller 25 to rotate, thereby generating negative pressure. This allows the wastewater in the container 28 to be transported to the flotation cell 1 through the conveying pipe 26. Air is transported to the wastewater in the flotation cell 1 through the conveying pipe 27. At the same time, the impeller 25 stirs the wastewater. The stirring allows the air bubbles to come into full contact with the wastewater, promoting the adhesion of pollutants. During this process, hydrophobic particles are more likely to adhere to the air bubbles due to surface tension. Under negative pressure, the air bubbles carrying pollutants quickly rise to the liquid surface and form a foam layer.

[0042] Transmission component 22 employs an advanced mechanical transmission design with a precise internal structure, minimizing energy loss and noise generation during transmission. Under the powerful driving force of drive source 21, transmission component 22 operates smoothly and efficiently. As transmission component 22 rotates, the closely connected shaft 24 also begins to rotate synchronously. The shaft 24 undergoes special dynamic balancing treatment to ensure stability even at high speeds, preventing damage to the equipment due to vibration. The rotation of shaft 24 directly drives the rotation of impeller 25, a key component in the entire system. Its blade shape is carefully designed to conform to fluid mechanics principles. When the impeller 25 rotates at high speed, it creates strong water flow disturbance in the surrounding water, resulting in a significant negative pressure environment. This negative pressure effect acts like a powerful suction, causing the wastewater in the container 28 to be stably and continuously transported to the flotation cell 1 along the first conveying pipe 26. Air is precisely transported into the wastewater in the flotation cell 1 through the second conveying pipe 27. To ensure that the air can be evenly dispersed in the wastewater, the bottom end of the mixing support pipe 23 is equipped with a fine air diffusion device. This device can decompose the incoming air into countless tiny bubbles, greatly increasing the contact area between the air and the wastewater. Under the continuous stirring action of the impeller 25, the wastewater in the flotation cell 1 exhibits a violent turbulent state.

[0043] like Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the scraping mechanism 3 includes a second drive source 31, a second transmission component 32, a rotating part 33, a scraping component 34, and a cleaning component 35. The rotating part 33 is rotatably connected to the discharge port 11 on the flotation cell 1. The scraping component 34 is connected to the rotating part 33. When the rotating part 33 rotates, it can drive the scraping component 34 to move along a circular trajectory. When the scraping component 34 moves along the circular trajectory, it can push the foam layer on the surface of the wastewater and scrape the flocculent matter in the wastewater. The foam layer and flocculent matter are then discharged outward from the discharge port 11. The cleaning component 35 is connected to the scraping component 34 and can clean the foam and flocculent matter on the scraping component 34. To prevent some foam and flocculent material from being re-contained into the flotation cell 1 while the scraper 34 moves along the circular trajectory, a second drive source 31 is connected to the flotation cell 1. The second drive source 31 is a motor. A second transmission component 32 is connected between the output end of the second drive source 31 and the rotating part 33. The second transmission component 32 includes a transmission belt and two transmission wheels. The two transmission wheels are respectively connected to the output end of the second drive source 31 and the rotating part 33. The transmission belt is connected between the two transmission wheels. Starting the second drive source 31 can drive the transmission between the transmission belt and the two transmission wheels, thereby providing power for the operation of the rotating part 33.

[0044] Start the second drive source 31, which drives the second transmission component 32 to run. When the second transmission component 32 runs, it drives the rotating part 33 to rotate, so that the rotating part 33 drives the scraper 34 and the cleaning part 35 to move along a circular trajectory. When the scraper 34 moves along the circular trajectory, it scrapes the foam layer on the surface of the sewage and the flocculent matter in the sewage, and discharges the foam layer and flocculent matter outward from the discharge port 11. After the scraper 34 discharges the foam layer and flocculent matter outward from the discharge port 11, the cleaning part 35 cleans the remaining foam layer and flocculent matter on the scraper 34 to prevent the remaining foam layer and flocculent matter on the scraper 34 from re-entering the flotation cell 1.

[0045] Continue to refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, the scraping component 34 includes a connecting part 341, a scraper 342, a scraper screen 343, an elastic part 344, and a blocking part 345. The connecting part 341 is connected to the rotating part 33. The scraper 342 is connected to the end of the connecting part 341 away from the rotating part 33. The scraper 342 can scrape the foam layer on the surface of the sewage. The scraper screen 343 is rotatably connected to the end of the scraper 342 away from the connecting part 341. The scraper screen 343 can extend into the sewage to scrape the flocculent matter in the sewage. The elastic part 344 is connected between the scraper screen 343 and the scraper 342 to drive the scraper screen 343 to reset. The blocking part 345 is connected inside the flotation cell 1. The flotation cell 1 is located on the moving trajectory of the scraper screen 343. When the rotating scraper 34 moves along a circular trajectory, the scraper 343 can extend into the sewage and scrape off the flocculent material. When the scraper 343 passes the blocking part 345, it flips over after being blocked by the blocking part 345. At this time, the flocculent material will separate from the scraper 343 under the flow of sewage. After the scraper 343 separates from the blocking part 345, the scraper 343 resets under the action of the elastic part 344 and continues to move along the circular trajectory. At this time, the scraper 343 can continue to scrape off the flocculent material to avoid the excessive adhesion between the flocculent material and the scraper 343 under the resistance of the sewage when the scraper 343 scrapes the flocculent material and moves in the sewage, which would affect the subsequent detachment of the flocculent material from the scraper 343.

[0046] When the rotating part 33 rotates, it drives the scraping part 34 to move along a circular trajectory, so that the scraper 342 scrapes and cleans the foam layer on the surface of the sewage. At the same time, the scraper net 343 extends into the sewage to scrape off the flocculent matter. When the scraper net 343 passes the blocking part 345, the scraper net 343 is blocked by the blocking part 345 and rotates and twists the elastic part 344, so that the flocculent matter is separated from the scraper net 343. After the scraper net 343 passes the blocking part 345, the elastic part 344 drives the scraper net 343 to reset and continue to move along the circular trajectory, thereby scraping off the flocculent matter again, thus scraping out the flocculent matter in the sewage and discharging it out from the discharge port 11.

[0047] The rotating part 33, as the core driving component, drives the scraper 34 to move regularly along a preset circular trajectory with its stable and controllable rotation speed. This design not only ensures that the scraping action covers the entire liquid surface area, but also achieves the dual functions of efficient cleaning and material separation through mechanical optimization. Specifically, the scraper 34 integrates a multi-functional structure. Its front scraper 342 is made of wear-resistant and corrosion-resistant material, and its edges are precision-polished to accurately conform to the contour of the sewage surface. During rotation, it continuously and efficiently scrapes and cleans the foam layer accumulated on the surface, effectively removing scum and suspended impurities. At the same time, the scraper net 343 extending from below the scraper 34 penetrates deep into the sewage. This scraper net 343 is woven from high-strength metal wire, and the mesh size is strictly calculated to effectively intercept flocculent matter in the water without excessively obstructing the water flow. When the 43 reaches the position of the blocking part 345, the unique mechanical linkage mechanism is triggered. The blocking part 345, as a fixed boss structure, is precisely matched with the movement trajectory of the scraper 343, forcing the scraper 343 to rotate in a controlled manner at the moment of contact. During the forced twisting of the scraper 343, the elastic part 344 generates deformation and stores energy. Through physical principles, the fibrous material attached to it is detached from the surface of the scraper 343 due to inertia and shear force. As the scraper 343 successfully passes the blocking part 345, the elastic part 344 quickly rebounds with its own restoring force, driving the scraper 343 to accurately reset to the initial working position. After resetting, the scraper 343 continues to maintain the optimal working angle, moves continuously along the circular trajectory, and performs the scraping task again. This cycle repeats to form an efficient fibrous material collection system. The scraped fibrous material is discharged outward from the discharge port 11.

[0048] Continue to refer to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6As shown, the cleaning component 35 includes a guide rail 351, a cleaning frame 352, an elastic part 353, a brush 354, and a roller 355. The guide rail 351 is connected inside the flotation cell 1. The cleaning frame 352 is sleeved on the outside of the scraper 342. The elastic part 353 is connected between the cleaning frame 352 and the rotating part 33. The elastic part 353 is a compression spring, which can push the cleaning frame 352 to reset, so as to clean the foam on the scraper 342 through the cleaning frame 352. The brush 354 is connected to the inside of the cleaning frame 352, and can clean the scraper screen 343 through the brush 354. The roller 355 is rotatably connected to the outside of the cleaning frame 352. The guide rail 351 is located on the track of the roller 355. The guide rail 351 includes an arc section and a horizontal section. The arc section and the horizontal section are integrally formed. When the scraper 342 moves along the circular track, it drives the cleaning frame 352 to move along the circular track. The cleaning frame 352 moves along a circular trajectory so that the roller 355 on the cleaning frame 352 first contacts the arc-shaped section on the guide rail 351. After the roller 355 moves to the horizontal section on the guide rail 351, it is blocked by the horizontal section, causing the cleaning frame 352 and the scraper 342 to misalign and compress the elastic part 353. The scraper 342 leaks out from the cleaning frame 352. At this time, the foam layer on the surface of the sewage is scraped by the scraper 342. After the roller 355 separates from the horizontal section, the cleaning frame 352 loses the obstruction of the horizontal section. At this time, the cleaning frame 352 is pushed to reset by the elastic force of the elastic part 353. The foam on the scraper 342 is cleaned by the cleaning frame 352, and the brush 354 in the cleaning frame 352 cleans the scraper screen 343 to prevent some foam and flocculent material from not leaving the scraper 34 and being re-transported into the flotation cell 1 as the scraper 34 moves along the circular trajectory.

[0049] The rotating part 33 rotates and drives the scraper 342 to move along a circular track. The scraper 342 drives the cleaning frame 352 to move synchronously along the circular track. When the cleaning frame 352 passes the guide rail 351, the roller 355 on the cleaning frame 352 first contacts the arc-shaped section on the guide rail 351, so that the roller 355 rolls in the arc-shaped section. After the roller 355 moves to the horizontal section, the horizontal section blocks the roller 355, so that the cleaning frame 352 and the scraper 342 are misaligned, and the elastic part 353 is compressed. At this time, the scraper 342 moves from the cleaning frame 352. Extending out from 52, the scraper 342 scrapes the foam layer on the surface of the sewage. After scraping, the scraper 342 continues to move along a circular trajectory, so that the scraper 342 and the scraper net 343 respectively discharge the foam and flocculent matter from the discharge port 11. Then, the roller 355 separates from the horizontal section on the guide rail 351. At this time, under the elastic force of the elastic part 353, the cleaning frame 352 is pushed to reset. The foam on the scraper 342 is cleaned by the cleaning frame 352, and the scraper net 343 is cleaned by the brush 354 inside the cleaning frame 352.

[0050] As the roller 355 gradually moves to the horizontal straight section of the guide rail, the horizontal section effectively blocks the roller, triggering a key misalignment mechanism: under the action of external force, the cleaning frame 352 undergoes a controllable offset relative to the scraper 342. This process simultaneously compresses the elastic part 353 connecting the two. This elastic part 353 is made of fatigue-resistant high-molecular elastic material, which can precisely control the magnitude and direction of the force. When the predetermined displacement is reached, the scraper 342 extends out from inside the cleaning frame, forming an independent working state. At this time, the scraping part of the scraper 342 is exactly at the optimal working angle, which can efficiently scrape off the foam layer accumulated on the surface of the sewage. At the same time, the scraper net 343 goes deep underwater to capture suspended flocculent matter.

[0051] Working principle:

[0052] The drive source 21 is activated to drive the transmission component 22. When the transmission component 22 is running, it drives the rotating shaft 24 to rotate. When the rotating shaft 24 rotates, it drives the impeller 25 to rotate, thereby generating negative pressure. This causes the wastewater in the container 28 to be transported to the flotation cell 1 through the conveying pipe 26. Air is transported to the wastewater in the flotation cell 1 through the conveying pipe 27. At the same time, the impeller 25 stirs the wastewater. The stirring makes the air bubbles fully contact the wastewater, promoting the adhesion of pollutants. During this process, hydrophobic particles are more likely to adhere to the air bubbles due to surface tension. Under negative pressure, the air bubbles carrying pollutants quickly rise to the liquid surface, forming a foam layer. As the air bubbles gradually rise, the thickness of the foam layer increases.

[0053] Start the second drive source 31, which drives the second transmission component 32 to run. When the second transmission component 32 runs, it drives the rotating part 33 to rotate, so that the rotating part 33 drives the scraper 34 and the cleaning part 35 to move along a circular trajectory. When the scraper 34 moves along the circular trajectory, the scraper 342 inside the scraper 34 scrapes and cleans the foam layer on the surface of the sewage. At the same time, the scraper net 343 extends into the sewage to scrape flocculent matter. When the scraper net 343 passes the blocking part 345, the scraper net 343 is blocked by the blocking part 345 and rotates and twists the elastic part 344, so that the flocculent matter is separated from the scraper net 343. After the scraper net 343 passes the blocking part 345, the elastic part 344 drives the scraper net 343 to reset and continue to move along the circular trajectory, thereby scraping flocculent matter again and scraping out the flocculent matter in the sewage, which is then discharged out from the discharge port 11.

[0054] When the cleaning frame 352 passes the guide rail 351, the roller 355 on the cleaning frame 352 first contacts the arc-shaped section on the guide rail 351, causing the roller 355 to roll within the arc-shaped section. After the roller 355 moves to the horizontal section, the horizontal section blocks the roller 355, causing the cleaning frame 352 to be misaligned with the scraper 342 and compressing the elastic part 353. At this time, the scraper 342 extends from the cleaning frame 352 and scrapes off the foam layer on the surface of the sewage. After scraping is completed, the scraper... Plate 342 continues to move along a circular trajectory, causing scraper 342 and scraper net 343 to discharge foam and flocculent material outward from discharge port 11, respectively. Then, roller 355 separates from the horizontal section on guide rail 351. At this time, under the elastic force of elastic part 353, cleaning frame 352 is pushed to reset. Foam on scraper 342 is cleaned by cleaning frame 352, and scraper net 343 is cleaned by brush 354 in cleaning frame 352. The cleaned foam and flocculent material are discharged outward from discharge port 11.

[0055] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An adaptive negative pressure flotation wastewater treatment device, comprising a flotation tank (1) and a negative pressure stirring mechanism (2), characterized in that, It also includes a scraping mechanism (3), which includes a rotating part (33) and a scraping component (34). The rotating part (33) is rotatably connected to the flotation cell (1). The scraping component (34) includes a connecting part (341), a scraper (342), a scraper screen (343), an elastic part (344), and a blocking part (345). The connecting part (341) is connected to the rotating part (33), the scraper (342) is connected to the connecting part (341), and the scraper screen (343) is rotatably connected to the scraper (342). It can extend into the wastewater in the flotation cell (1) and scrape the flocculent material in the wastewater. The elastic part (344) is connected between the scraper (343) and the scraper (342). The blocking part (345) is connected in the flotation cell (1). When the scraper (343) passes through the blocking part (345), it can flip over so that the flocculent material is separated from the scraper (343). After the scraper (343) is separated from the blocking part (345), the elastic part (344) drives the scraper (343) to reset and continues to scrape the flocculent material through the scraper (343). The scraping mechanism (3) also includes a cleaning component (35), which is connected to the scraping component (34); The cleaning component (35) includes a guide rail (351), a cleaning frame (352), an elastic part (353), and a roller (355). The guide rail (351) is connected inside the flotation cell (1), the roller (355) is rotatably connected to the cleaning frame (352), the cleaning frame (352) is sleeved on the scraper (342), and the elastic part (353) is connected between the cleaning frame (352) and the rotating part (33).

2. The adaptive negative pressure flotation wastewater treatment device according to claim 1, characterized in that, The scraping mechanism (3) further includes a second drive source (31) and a second transmission component (32). The second drive source (31) is connected to the flotation cell (1), and the second transmission component (32) is connected between the second drive source (31) and the rotating part (33).

3. The adaptive negative pressure flotation wastewater treatment device according to claim 2, characterized in that, The transmission component two (32) includes a transmission belt and two transmission wheels. The two transmission wheels are respectively connected to the drive source two (31) and the rotating part (33), and the transmission belt is connected between the two transmission wheels.

4. The adaptive negative pressure flotation wastewater treatment device according to claim 1, characterized in that, A brush (354) is connected inside the cleaning frame (352).

5. The adaptive negative pressure flotation wastewater treatment device according to claim 1, characterized in that, The guide rail (351) includes an arc section and a horizontal section.

6. The adaptive negative pressure flotation wastewater treatment device according to claim 1, characterized in that, The elastic part (344) is a torsion spring, used to drive the scraper (343) to reset.

7. The adaptive negative pressure flotation wastewater treatment device according to claim 1, characterized in that, The negative pressure stirring mechanism (2) includes a mixing support tube (23), a rotating shaft (24), an impeller (25), a first conveying pipe (26), a second conveying pipe (27), and a container (28). The container (28) is connected to the flotation cell (1). The mixing support tube (23) is connected inside the flotation cell (1). The rotating shaft (24) is rotatably connected inside the mixing support tube (23). The impeller (25) is connected to the bottom end of the rotating shaft (24). The first conveying pipe (26) and the second conveying pipe (27) are both connected to the mixing support tube (23). The end of the first conveying pipe (26) away from the mixing support tube (23) is connected to the container (28).

8. The adaptive negative pressure flotation wastewater treatment device according to claim 7, characterized in that, The rotating shaft (24) is coaxially arranged with the hybrid support tube (23).

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