Flotation separation device for separating silicon particles from waste liquid

Abstract

The invention relates to the technical field of water pollution flotation method treatment, and discloses a flotation separation device for separating silicon particles in waste liquid, which comprises a base table, a flotation box is fixedly connected above the base table, a partition plate is fixedly connected at the center of the inner wall of the flotation box, and the flotation box is divided into a treatment bin I and a treatment bin II by the partition plate; a screening bin is fixedly connected to the upper portion of the flotation box, a feeding bin is fixedly connected to the top of the screening bin, a screening assembly is arranged in the screening bin, a drainage assembly is arranged below a screening net plate, the drainage assembly comprises two parallel drainage plates, and the drainage assembly accurately switches a drainage channel to enable the screening net plate to rotate. Fine silicon particles and coarse silicon particles enter the first treatment bin and the second treatment bin respectively, then the fine silicon particles and the coarse silicon particles are separated for flotation separation, appropriate flotation conditions can be provided according to the characteristics of the coarse silicon particles and the fine silicon particles, the flotation effect and the recovery rate of the silicon particles are improved, and therefore silicon particle products more uniform in quality and higher in purity are obtained.

Description

Technical Field

[0001] This invention belongs to the field of water pollution flotation treatment technology, specifically relating to a flotation separation device for separating silicon particles from waste liquid. Background Technology

[0002] The flotation separation device for separating silicon particles from waste liquid is an industrial equipment specifically designed for the efficient separation of silicon particles from waste liquid. Its core lies in utilizing the differences in surface physicochemical properties between silicon particles and other impurities, and realizing the recovery and purification of silicon particles through the principles of bubble adsorption and flotation separation, thereby achieving the treatment of water pollution through flotation.

[0003] In the specific process of separating silicon particles from waste liquid by flotation, the waste liquid is initially separated into solid and liquid components by means of filtration, centrifugation, or sedimentation to remove most of the liquid and light impurities, resulting in coarse filter material containing silicon particles. The silicon particles in the coarse filter material are then dried to obtain dried silicon particles. The dried silicon particles are added to a flotation tank along with appropriate amounts of water and flotation reagents to prepare a slurry of a certain concentration. Air bubbles are introduced into the slurry through a gas injection device at the bottom of the flotation tank, while the stirring device inside the flotation tank is activated to promote the collision and adhesion of air bubbles with silicon particles, while keeping the silicon particles in suspension. The silicon particles attached to the air bubbles float to the surface of the slurry, forming a foam layer. The foam layer is continuously scraped off by a scraper or robotic arm at the top of the flotation tank, thus achieving the initial flotation separation process of silicon particles.

[0004] In existing flotation operations, dried silicon particles are directly added to the flotation tank without screening. Due to the size difference between fine and coarse silicon particles, their requirements for flotation conditions, such as bubble size and stirring intensity, are drastically different. Fine silicon particles, with their small diameter, require smaller bubbles and can be separated from impurities well under relatively mild stirring conditions. In contrast, coarse silicon particles, with their large diameter, require larger bubbles and stronger stirring to float effectively. When the two are mixed together for flotation, it is difficult to simultaneously meet their respective suitable flotation conditions. This can lead to fine silicon particles failing to float effectively due to excessive stirring or overly large bubbles, while coarse silicon particles may not be completely separated due to underly small bubbles or insufficient stirring. This affects the silicon particle recovery rate, resulting in inconsistent silicon particle product quality and difficulty in ensuring uniformity of purity and quality.

[0005] Therefore, the present invention provides a flotation separation device for separating silicon particles from waste liquid. Summary of the Invention

[0006] To overcome the shortcomings of the prior art: to solve at least one technical problem raised in the background art.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A flotation separation device for separating silicon particles from waste liquid, as described in this invention, includes a base platform, a flotation tank fixedly connected above the base platform, a partition plate fixedly connected at the center of the inner wall of the flotation tank, the partition plate dividing the flotation tank into two parts: processing chamber one and processing chamber two, a screening chamber fixedly connected above the flotation tank, a feed chamber fixedly connected to the top of the screening chamber, a screening assembly provided inside the screening chamber, the screening assembly including a rotatable screening screen, the screening screen can automatically clean the silicon particles stuck in its inner hole during rotation, a vibrator fixedly installed on one side of the bottom of the screening screen, a flow guiding assembly provided below the screening screen, the flow guiding assembly including two parallel flow guiding plates, a side shifting assembly provided on one side of the screening screen, the side shifting assembly can switch the flow channel orientation of the two flow guiding plates when moving.

[0008] Preferably, the screening assembly further includes a bearing seat, which is fixedly installed on the side wall of the screening chamber. The shaft of the bearing seat is fixedly connected to the inner wall of one end of the screening screen plate. Arc-shaped slides are symmetrically fixedly connected to the side of the bearing seat. Inner slides are slidably connected to the inner walls of the arc-shaped slides. The inner slides are fixedly connected to both sides of the screening screen plate. Telescopic rods are fixedly connected to the inner walls of the arc-shaped slides. One end of the telescopic rod is fixedly connected to the bottom of the inner slide.

[0009] Preferably, the side-shifting assembly includes a side-blocking plate, which is slidably connected between the sides of the two screening chambers. A connecting frame is fixedly connected between the outer walls of the two screening chambers. A connecting rod is inserted into the inner wall of the connecting frame. One end of the connecting rod is fixedly connected to the side of the side-blocking plate. A spring is fixedly connected between the side of the connecting frame and the side of the side-blocking plate. A pressing block is symmetrically fixedly connected to the end of the screening screen away from the bearing seat. One end of the pressing block is in contact with the inner side of the side-blocking plate.

[0010] Preferably, protective plates are fixedly connected to both sides of the side blocking plate, and material gathering plates are symmetrically fixedly connected to the inner sides of the protective plates. The bottom of each material gathering plate is rotatably connected to a hinge seat. The shafts of the two hinge seats are fixedly connected to one end of the two diversion plates respectively. A gear assembly that drives the shaft to rotate is provided on the outer side of the hinge seat.

[0011] Preferably, the gear assembly includes two straight toothed plates, which are fixedly connected to both sides of the screening chamber. Gear 1 is fixedly connected to both ends of the shaft of the hinge seat. The teeth of the two gear 1s can simultaneously mesh with the teeth of the straight toothed plates. The shaft of the hinge seat is rotatably connected to the inner wall of the protective plate. Guide slides are symmetrically fixedly connected to the top of the flotation tank. Guide sliders are fixedly connected to the sides of the protective plate. The guide sliders are slidably connected to the inner wall of the guide slides.

[0012] Preferably, a limiting plate is fixedly connected between the inner walls of the screening chamber, and a limiting component is provided on the upper surface of the screening screen to prevent coarse silicon particles from being poured out prematurely.

[0013] Preferably, the limiting component includes a rotating shaft rotatably connected between the inner walls of the two extrusion blocks, a feeding plate fixedly connected to the outer wall of the rotating shaft, and gears two fixedly connected to both ends of the rotating shaft. An arc-shaped toothed plate is symmetrically fixedly connected to the inner wall of the screening chamber, and the teeth of gears two can mesh with the teeth of the arc-shaped toothed plate.

[0014] Preferably, multiple cleaning rods are fixedly connected to the side of the bearing housing. The number of cleaning rods corresponds to the number and position of the mesh holes of the screening screen plate, and the shape of the cleaning rods is adapted to the inner wall of the mesh holes of the screening screen plate.

[0015] Preferably, both processing chamber one and processing chamber two have stirring rods rotatably connected to their inner walls, and multiple stirring blades are fixedly connected to the outer walls of the stirring rods. Differential gears are fixedly connected to the bottom of each stirring rod, and the teeth of two differential gears mesh with each other. A servo motor is fixedly installed on the top of the base platform, and the output shaft of the servo motor is fixedly connected to one end of one of the stirring rods.

[0016] Preferably, an air inlet box is placed on the top of the base platform. An air inlet pipe 1 and an air inlet pipe 2 are fixedly connected to one side of the air inlet box. One end of the air inlet pipe 1 is fixedly connected to the inside of the processing chamber 2, and one end of the air inlet pipe 2 is fixedly connected to the inside of the processing chamber 1. An air extraction valve is provided on the outside of both the air inlet pipe 1 and the air inlet pipe 2. The inner diameter of the air inlet pipe 1 is larger than the inner diameter of the air inlet pipe 2.

[0017] The beneficial effects of this invention are as follows: 1. The flotation separation device for separating silicon particles from waste liquid according to the present invention utilizes a rotatable screening screen and a vibrator to drive the screening screen to vibrate, allowing fine silicon particles to pass through the screen holes and enter the processing chamber one, while coarse silicon particles remain on the surface of the screening screen. During the rotation of the screening screen, it can automatically clean the silicon particles stuck in its inner holes, avoiding the problem of screen hole blockage, ensuring the continuity and stability of the screening process, and improving the screening efficiency.

[0018] 2. The flotation separation device for separating silicon particles from waste liquid according to the present invention forms a specific feeding channel for two parallel guide plates through the guide component. In the initial state, it guides fine silicon particles into processing chamber one, and after the lateral shift component changes its orientation, it guides coarse silicon particles into processing chamber two. This plays a role in guiding silicon particles accurately into the corresponding processing chamber, ensuring the smooth progress of the separation process. By accurately switching the guide channel, fine and coarse silicon particles enter processing chamber one and processing chamber two respectively, and then the fine and coarse silicon particles are separated by flotation. It can provide suitable flotation conditions according to the characteristics of coarse and fine silicon particles, improve the flotation effect and silicon particle recovery rate, thereby obtaining silicon particle products with more uniform quality and higher purity.

[0019] 3. The flotation separation device for separating silicon particles from waste liquid according to the present invention, through the limiting component, after the side blocking plate has completed its movement, that is, after the guide plate has completed the switching of the outlet end orientation, as the screening screen plate continues to rotate, the teeth of gear two mesh with the teeth of the arc-shaped toothed plate, and the feed plate rotates around the rotating shaft as the axis, gradually rotating from a state perpendicular to the surface of the screening screen plate to a state parallel to the surface of the screening screen plate, thus releasing the restriction on coarse silicon particles, allowing the coarse silicon particles to slide smoothly down the inclined surface of the screening screen plate, accurately collecting the coarse silicon particles, so that coarse and fine silicon particles can enter processing chamber two and processing chamber one respectively, providing good conditions for subsequent flotation separation of coarse and fine silicon particles. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a three-dimensional view of the entire invention; Figure 2 This is a schematic diagram of the structure of the flotation box in this invention; Figure 3 This is a schematic diagram of the structure at the partition plate in this invention; Figure 4 This is a schematic diagram of the structure of the air box in this invention; Figure 5 This is a schematic diagram of the structure of the screening chamber in this invention; Figure 6 This is a schematic diagram of the structure of the screening screen plate in this invention; Figure 7 This is a schematic diagram of the cleaning rod structure in this invention; Figure 8 This is a schematic diagram of the structure of the feeding plate in this invention; Figure 9 This is a schematic diagram of the structure at the side blocking plate in this invention; Figure 10 This is a schematic diagram of a gear structure in this invention; Figure 11 This is a schematic diagram of the structure of the drainage plate in this invention.

[0022] In the diagram: 1. Base platform; 2. Flotation box; 3. Separator plate; 4. Processing chamber one; 5. Processing chamber two; 6. Screening screen; 7. Diverter plate; 8. Servo motor; 9. Differential gear; 10. Stirring rod; 11. Stirring blade; 12. Air inlet box; 13. Air inlet pipe one; 14. Air inlet pipe two; 15. Extraction valve; 16. Screening chamber; 17. Bearing seat; 18. Arc-shaped slide block; 19. Inner slide block; 20. Telescopic rod ; 21. Feed hopper; 22. Extrusion block; 23. Vibrator; 24. Side blocking plate; 25. Connecting frame; 26. Insert rod; 27. Spring; 28. Protective plate; 29. ​​Material gathering plate; 30. Hinge seat; 31. Guide slide; 32. Guide slider; 33. Gear one; 34. Straight toothed plate; 35. Restriction plate; 36. Cleaning rod; 37. Discharge plate; 38. Rotating shaft; 39. Gear two; 40. Arc-shaped toothed plate. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] like Figures 1 to 11 As shown, the present invention provides a technical solution: a flotation separation device for separating silicon particles from waste liquid, including a base platform 1, a flotation tank 2 fixedly connected above the base platform 1, a partition plate 3 fixedly connected at the center of the inner wall of the flotation tank 2, the partition plate 3 dividing the flotation tank 2 into two parts, a first processing chamber 4 and a second processing chamber 5, a screening chamber 16 fixedly connected above the flotation tank 2, a feed chamber 21 fixedly connected to the top of the screening chamber 16, a screening assembly provided inside the screening chamber 16, the screening assembly including a rotatable screening screen plate 6, the screening screen plate 6 can automatically clean the silicon particles stuck in its inner hole during rotation, a vibrator 23 fixedly installed on one side of the bottom of the screening screen plate 6, a flow guiding assembly provided below the screening screen plate 6, the flow guiding assembly including two parallel flow guiding plates 7, a side shifting assembly provided on one side of the screening screen plate 6, the side shifting assembly can switch the flow channel orientation of the two flow guiding plates 7 when moving.

[0025] During operation: Before use, the waste liquid needs to be separated into solid and liquid components to obtain coarse filter material containing silicon particles. The silicon particles in the coarse filter material are then dried to obtain dried silicon particles, which are now a mixture of coarse and fine silicon particles. The dried silicon particles are continuously added to the feed hopper 21 and flow into the surface of the screening screen plate 6. Initially, the screening screen plate 6 is placed horizontally, with the outlet ends of the discharge channels formed by the two guide plates 7 facing the top of the processing chamber 4. After the silicon particles fall onto the upper surface of the screening screen plate 6, the vibrator 23 is activated to cause a small vibration on the surface of the screening screen plate 6. Fine silicon particles can fall downwards through the screen holes of the screening screen plate 6. Since the outlet ends of the discharge channels formed by the two guide plates 7 initially face the top of the processing chamber 4, the fine silicon particles can enter the processing chamber 4 through these channels, while the coarse silicon particles accumulate on the surface of the screening screen plate 6. When coarse silica particles need to be processed, the screening component drives the screening screen plate 6 to rotate. When the screening screen plate 6 rotates, one end of it will gradually tilt downward. When the screening screen plate 6 first starts to rotate, the coarse silica particles on its surface will not fall down along the inclined surface. When the screening screen plate 6 rotates at this time, it will trigger the side-shifting component to move. The side-shifting component will drive the two guide plates 7 to move laterally closer to the top of the second processing chamber 5 and rotate during the movement, changing the orientation of the channel and the outlet end. This will make the outlet end of the two guide plates 7 face the top of the second processing chamber 5. Then, when the screening screen plate 6 rotates, the coarse silica particles on its surface can fall down through the inclined surface. At this time, the outlet end of the two guide plates 7 faces the top of the second processing chamber 5, and the coarse particles can flow into the interior of the second processing chamber 5. After completion, the screening screen plate 6 rotates in the opposite direction to reset to its original state, the side-shifting component resets, and the two guide plates 7 realign their outlet ends with the top of the first processing chamber 4. After being screened by the screening assembly, the silica particles, with the cooperation of the side-shifting and guiding assemblies, allow fine silica particles to enter the interior of processing chamber 4, while coarse silica particles enter the interior of processing chamber 5. Both processing chambers 4 and 5 are equipped with stirring devices. Then, appropriate amounts of water and flotation reagents are added to processing chambers 4 and 5 respectively to prepare a slurry of a certain concentration. Smaller air bubbles are introduced into the fine silica particles in processing chamber 4, while larger air bubbles are introduced into the coarse silica particles in processing chamber 5. The stirring devices provide different stirring rates for each chamber, thus separating the silica particles in processing chambers 4 and 5 for flotation separation. Fine silica particles require smaller air bubbles and a relatively gentle stirring environment, while coarse silica particles require larger air bubbles and stronger stirring force for better flotation separation. This separate processing method provides suitable flotation conditions based on the characteristics of coarse and fine silica particles, greatly improving the flotation effect and silica particle recovery rate. In the above embodiments, the sieving assembly utilizes a rotatable sieve plate 6 and a vibrator 23 to vibrate the sieve plate 6, allowing fine silicon particles to pass through the sieve holes into the processing chamber 4, while coarse silicon particles remain on the surface of the sieve plate 6. During rotation, the sieve plate 6 automatically cleans the silicon particles stuck in its inner holes, avoiding sieve hole blockage and ensuring the continuity and stability of the sieving process, thus improving sieving efficiency. The flow guiding assembly forms a specific feeding channel for the two parallel flow guiding plates 7, guiding the fine silicon particles into the initial state. The coarse silicon particles are guided into processing chamber 4 by the side-shifting component after its orientation is changed. This guides the silicon particles to enter the corresponding processing chamber accurately, ensuring the smooth progress of the separation process. By accurately switching the flow channels, fine and coarse silicon particles enter processing chamber 4 and processing chamber 5 respectively. Then, the fine and coarse silicon particles are separated by flotation. Based on the characteristics of coarse and fine silicon particles, suitable flotation conditions can be provided, improving the flotation effect and silicon particle recovery rate, thereby obtaining silicon particle products with more uniform quality and higher purity.

[0026] like Figures 5 to 7 As shown, the screening assembly also includes a bearing seat 17, which is fixedly installed on the side wall of the screening chamber 16. The shaft of the bearing seat 17 is fixedly connected to the inner wall of one end of the screening screen plate 6. A curved slide block 18 is symmetrically fixedly connected to the side of the bearing seat 17. The inner wall of the curved slide block 18 is slidably connected to the inner slide block 19. The inner slide block 19 is fixedly connected to both sides of the screening screen plate 6. A telescopic rod 20 is fixedly connected to the inner wall of the curved slide block 18. One end of the telescopic rod 20 is fixedly connected to the bottom of the inner slide block 19.

[0027] During operation: After the dried silicon particles are continuously added to the feed hopper 21 and flow into the surface of the screening screen plate 6, the vibrator 23 is started to drive the surface of the screening screen plate 6 to vibrate slightly. The screening screen plate 6 remains in a horizontal position. During vibration, fine silicon particles fall downward through the screen holes of the screening screen plate 6 and enter the processing chamber 4 through the feeding channel formed by the two guide plates 7, while coarse silicon particles accumulate on the surface of the screening screen plate 6. When it is necessary to process the coarse silicon particles accumulated on the surface of the screening screen plate 6, the telescopic rod 20 is activated, so that the inner slider 19 slides along the inner wall of the arc-shaped slide block 18. The inner slider 19 can pull the two sides of the screening screen plate 6 downward, so that the screening screen plate 6 starts to rotate around the shaft of the bearing seat 17. One end of it gradually tilts downward. However, at the beginning of the rotation, the coarse silicon particles on its surface will not fall downward along the inclined surface at this time. At this time, the lateral displacement component causes the two guide plates 7 to switch the opening end orientation. Then, when the screening screen plate 6 continues to tilt, the coarse silicon particles can flow downward along the inclined surface of the screening screen plate 6 and enter the processing chamber 5 through the guidance of the guide plates 7.

[0028] like Figures 5 to 6As shown, the side-shifting assembly includes a side-blocking plate 24, which is slidably connected between the sides of two screening chambers 16. A connecting frame 25 is fixedly connected between the outer walls of the two screening chambers 16. A connecting rod 26 is inserted into the inner wall of the connecting frame 25. One end of the connecting rod 26 is fixedly connected to the side of the side-blocking plate 24. A spring 27 is fixedly connected between the side of the connecting frame 25 and the side of the side-blocking plate 24. A pressing block 22 is symmetrically fixedly connected to the end of the screening screen plate 6 away from the bearing seat 17. One end of the pressing block 22 is in contact with the inner side of the side-blocking plate 24.

[0029] During operation: In the initial state, the screening screen plate 6 is arranged horizontally. At this time, the pressing block 22 fixed to one end of the screening screen plate 6 tightly abuts against the inner side of the side blocking plate 24. In this state, the pressing block 22 applies a continuous lateral force to the side blocking plate 24, causing the spring 27 to be in a compressed state. During this process, the insertion rod 26 slides accordingly in the inner wall of the connecting frame 25 as the side blocking plate 24 moves, guiding and limiting the movement of the side blocking plate 24 to ensure its stability. When the screening screen plate 6 begins to rotate around the shaft of the bearing seat 17, As the rotation continues, the angle of the screening screen plate 6 gradually changes; at this time, the relative positional relationship between the extrusion block 22 and the side blocking plate 24 also changes, which in turn causes the direction and magnitude of the force exerted by the extrusion block 22 on the side of the side blocking plate 24 to gradually change. As the screening screen plate 6 continues to rotate and the rotation angle continues to increase, the pressure of the extrusion block 22 on the side blocking plate 24 gradually decreases. Under the elastic force of the spring 27, the side blocking plate 24 will move laterally closer to the screening screen plate 6. When the side blocking plate 24 moves, it will cause the two guide plates 7 to move closer to the top of the second processing chamber 5.

[0030] like Figures 9 to 11 As shown, protective plates 28 are fixedly connected to both sides of the side blocking plate 24. Aggregating plates 29 are symmetrically fixedly connected to the inner sides of the protective plates 28. The bottom of each aggregating plate 29 is rotatably connected to a hinge seat 30. The shafts of the two hinge seats 30 are fixedly connected to one end of the two diversion plates 7 respectively. A gear assembly that drives the shaft to rotate is provided on the outer side of the hinge seat 30.

[0031] During operation: In the initial state, the two guide plates 7 are tilted to the left and parallel. At this time, the guide channel and outlet end formed by the two guide plates 7 are located at the top of the processing chamber 4. Fine silicon particles that fall through the mesh of the screening plate 6 can first be concentrated along the inclined surface of the agglomeration plate 29 into the guide channel formed by the two guide plates 7, and can enter the interior of the processing chamber 4 through the outlet end. When the screening plate 6 rotates and causes the side blocking plate 24 to move laterally, the side blocking plate 24 can be carried by the protective plate 28. The moving material plate 29 and the diversion plate 7 move together, causing the diversion plate 7 to gradually approach the top of the second processing chamber 5. When the diversion plate 7 moves, the gear assembly causes the shaft of the hinge seat 30 to rotate. The rotation of the shaft of the hinge seat 30 allows the two diversion plates 7 to rotate around the shaft of the hinge seat 30, realizing the hinged rotation of the two diversion plates 7 during the movement. After the diversion plates 7 finish moving, the two diversion plates 7 tilt to the right at the same time, and the outlet end formed at this time is just aligned with the top of the second processing chamber 5.

[0032] like Figures 10 to 11 As shown, the gear assembly includes two straight toothed plates 34, which are fixedly connected to both sides of the screening chamber 16. Gear 33 is fixedly connected to both ends of the shaft of the hinge seat 30. The teeth of the two gears 33 can mesh with the teeth of the straight toothed plates 34 at the same time. The shaft of the hinge seat 30 is rotatably connected to the inner wall of the protective plate 28. Guide slides 31 are symmetrically fixedly connected to the top of the flotation tank 2. Guide sliders 32 are fixedly connected to the sides of the protective plate 28. The guide sliders 32 are slidably connected to the inner wall of the guide slides 31.

[0033] During operation: When the side blocking plate 24 drives the protective plate 28, the material gathering plate 29, and the diversion plate 7 to move laterally, the gears 33 connected to the shafts of the two hinge seats 30 can mesh with the same straight toothed plate 34, causing the two diversion plates 7 to rotate simultaneously around the shafts of the corresponding hinge seats 30. This allows the two diversion plates 7 to change the direction of the flow channel simultaneously, synchronously, and accurately. When the diversion plates 7 move laterally, they can get closer to the top of the second processing chamber 5. Combined with the switching of the angles of the two diversion plates 7, the outlet end can... The top of the second processing chamber 5 is precisely aligned; when the protective plate 28 moves, it can be guided by the sliding relationship between the guide slide 31 and the guide slider 32, which improves the stability of the sliding process; in addition, after the entire screening process is completed, when the screening screen plate 6 returns to its original state by rotating in the reverse direction through the screening assembly, the squeezing block 22 will squeeze the side blocking plate 24 to move in the reverse direction to return to its original state as it gradually rotates in the reverse direction, and squeeze the spring 27 again. When the side blocking plate 24 moves in the reverse direction to reset, the two diversion plates 7 can also return to the initial state of being aligned with the top of the first processing chamber 4.

[0034] like Figure 9As shown, a limiting plate 35 is fixedly connected between the inner walls of the screening chamber 16, and a limiting component is provided on the upper surface of the screening screen plate 6 to prevent coarse silicon particles from being poured out prematurely.

[0035] During operation: When the screening screen plate 6 begins to rotate around the shaft of the bearing seat 17, the main purpose of this stage is to switch the orientation of the outlet end of the guide plate 7 through the side-moving component and the guide component. Although the surface of the screening screen plate 6 forms an incline at this time, the coarse silica particles are effectively restricted by the limiting component and will not fall along the incline. As the screening screen plate 6 continues to rotate, the side blocking plate 24 gradually moves under the elastic force of the spring 27 until it fits against the connecting frame 25. At this time, the side blocking plate 24 reaches its limit position and cannot move further. This indicates that the guide plate 7 has completed the switching of the outlet end orientation. When the screening screen plate 6 continues to rotate, the limiting component will release the restriction on the coarse silica particles. At this time, the coarse silica particles are no longer constrained by the limiting component and can slide down the incline of the screening screen plate 6 and flow smoothly into the interior of the second processing chamber 5 through the channel of the guide plate 7, which has completed the orientation switching. This achieves accurate collection of coarse silica particles and prepares for subsequent flotation separation operations.

[0036] like Figures 6 to 8 As shown, the limiting component includes a rotating shaft 38, which is rotatably connected between the inner walls of the two extrusion blocks 22. A feeding plate 37 is fixedly connected to the outer wall of the rotating shaft 38. Gears 39 are fixedly connected to both ends of the rotating shaft 38. An arc-shaped toothed plate 40 is symmetrically fixedly connected to the inner wall of the screening chamber 16. The teeth of the gears 39 can mesh with the teeth of the arc-shaped toothed plate 40.

[0037] During operation: When the screening screen plate 6 is placed horizontally, the rotating shaft 38 is perpendicular to the surface of the screening screen plate 6, and the feeding plate 37, driven by the rotating shaft 38, blocks the inclined end of the screening screen plate 6; as the screening screen plate 6 begins to rotate to switch the orientation of the outlet ends of the two guide plates 7, the rotating shaft 38 remains perpendicular to the surface of the screening screen plate 6; at this time, due to the blocking effect of the feeding plate 37, coarse silica particles are effectively prevented from falling off the screening screen plate 6; as the screening process progresses, when the side blocking plate 24 completes its movement and the screening screen plate 6... As the rotation continues, the teeth of gear 39 mesh with the teeth of the arc-shaped toothed plate 40. Under the meshing action, the feed plate 37 rotates around the shaft 38, gradually changing from a state perpendicular to the surface of the screening screen plate 6 to a state parallel to the surface of the screening screen plate 6. At this time, the coarse silica particles on the surface of the screening screen plate 6 are no longer blocked by the feed plate 37 and can smoothly slide down the inclined surface of the screening screen plate 6 and fall into the processing chamber 5 through the channel of the guide plate 7, completing the collection of coarse silica particles and providing conditions for subsequent flotation separation operations.

[0038] like Figures 6 to 7As shown, a plurality of cleaning rods 36 are fixedly connected to the side of the bearing seat 17. The number of cleaning rods 36 corresponds to the number and position of the mesh holes of the screening screen plate 6, and the shape of the cleaning rods 36 is adapted to the inner wall of the mesh holes of the screening screen plate 6.

[0039] During operation: When the screening screen plate 6 rotates around the shaft of the bearing seat 17 until it reaches its limit position, multiple cleaning rods 36 fixed on the side of the bearing seat 17 will accurately insert into the corresponding mesh holes of the screening screen plate 6. Since the shape of the cleaning rods 36 is adapted to the inner wall of the mesh holes of the screening screen plate 6, during the insertion process, the cleaning rods 36 can apply force to the irregular silicon particles stuck in the mesh holes, squeezing these irregular silicon particles out of the mesh holes. This design effectively solves the problem that the mesh holes of the screening screen plate 6 are easily blocked by irregular silicon particles during the screening process, ensuring the screening efficiency and service life of the screening screen plate 6, and allowing fine silicon particles to pass through the screen holes of the screening screen plate 6 more smoothly into the processing chamber 4, providing good conditions for subsequent flotation separation operations.

[0040] like Figures 2 to 3 As shown, stirring rods 10 are rotatably connected to the inner walls of processing chamber 1 4 and processing chamber 2 5. Multiple stirring blades 11 are fixedly connected to the outer walls of the stirring rods 10. Differential gears 9 are fixedly connected to the bottom of the stirring rods 10. The teeth of the two differential gears 9 mesh with each other. A servo motor 8 is fixedly installed on the top of the base platform 1. The output shaft of the servo motor 8 is fixedly connected to one end of one of the stirring rods 10.

[0041] During operation: When fine silica particles enter the interior of processing chamber 1 4 and coarse silica particles enter the interior of processing chamber 2 5, appropriate amounts of water and flotation reagents are added to the inner walls of processing chamber 1 4 and processing chamber 2 5. Then, the servo motor 8 is started, driving one of the stirring rods 10 to rotate. The other stirring rod 10 can also rotate through the meshing relationship of two differential gears 9, thereby rotating the two sets of stirring blades 11 to mix and stir the solution and silica particles. Under the transmission action of the differential gears 9, the two stirring rods 10 rotate at different speeds. For processing chamber 1 4, the slurry prepared with water and flotation reagents is stirred at a low speed, providing a relatively mild stirring environment. For processing chamber 2 5, the stirring blades 11 inside it stir the slurry prepared with coarse silica particles, water and flotation reagents, providing a stronger stirring force.

[0042] like Figure 4 As shown, an air inlet box 12 is placed on the top of the base platform 1. An air inlet pipe 13 and an air inlet pipe 2 14 are fixedly connected to one side of the air inlet box 12. One end of the air inlet pipe 13 is fixedly connected to the inside of the processing chamber 2 5, and one end of the air inlet pipe 2 14 is fixedly connected to the inside of the processing chamber 1 4. An air extraction valve 15 is provided on the outside of both the air inlet pipe 13 and the air inlet pipe 2 14. The inner diameter of the air inlet pipe 13 is larger than the inner diameter of the air inlet pipe 2 14.

[0043] During operation: The gas filling box 12 stores gas for bubble generation. When the suction valve 15 is opened, the gas inside the gas filling box 12 is drawn through the first air inlet pipe 13 and the second air inlet pipe 14 to the bottom of the first processing chamber 4 and the second processing chamber 5 under the action of pressure difference. Because the inner diameter of the first air inlet pipe 13 is larger, the amount of gas entering the second processing chamber 5 per unit time is relatively larger, forming larger bubbles in the second processing chamber 5 to meet the requirement of larger bubbles during the flotation of coarse silicon particles. On the other hand, the inner diameter of the second air inlet pipe 14 is smaller, so the amount of gas entering the first processing chamber 4 is relatively smaller, forming smaller bubbles that are suitable for the flotation of fine silicon particles. In particle flotation, smaller bubbles are required. As these bubbles rise in processing chambers 4 and 5, they collide with and adhere to silicon particles. This adhesion between bubbles and silicon particles is key to achieving flotation separation. Through this adhesion, silicon particles can adhere to the surface of the bubbles. At the same time, the upward movement of the bubbles keeps the silicon particles in a suspended state, changing their settling characteristics in the slurry. Fine silicon particles are more likely to adhere to small bubbles and float to the surface, while coarse silicon particles need to adhere to larger bubbles to achieve better flotation separation, thus achieving the purpose of separating coarse and fine silicon particles for flotation separation.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A flotation separation device for separating silicon particles from a waste liquid, comprising a base platform, characterised in that: The upper part of the base table is fixedly connected with a flotation box, the inner wall center of the flotation box is fixedly connected with a partition plate, the partition plate divides the flotation box into two parts of a treatment bin one and a treatment bin two, the upper part of the flotation box is fixedly connected with a screening bin, the top of the screening bin is fixedly connected with a feeding bin, the inside of the screening bin is provided with a screening assembly, the screening assembly includes a rotatable screening mesh plate, the screening mesh plate can automatically clean the silicon particles stuck in the inner hole thereof during rotation, the bottom side of the screening mesh plate is fixedly installed with a vibration exciter, the lower part of the screening mesh plate is provided with a flow guide assembly, the flow guide assembly includes two parallel flow guide plates, one side of the screening mesh plate is provided with a side shifting assembly, the side shifting assembly can switch the flow passage direction of the two flow guide plates when moving.

2. A device for separating silicon particles from waste liquid by flotation separation according to claim 1, characterized in that: The screening assembly further includes a bearing seat, the bearing seat is fixedly installed on the side wall of the screening bin, the shaft rod of the bearing seat is fixedly connected with the inner wall of one end of the screening mesh plate, the side surface of the bearing seat is fixedly connected with arc-shaped sliding seats in a symmetrical manner, the inner walls of the arc-shaped sliding seats are slidably connected with inner sliding blocks, the inner sliding blocks are fixedly connected with the two sides of the screening mesh plate respectively, the inner walls of the arc-shaped sliding seats are fixedly connected with telescopic rods, one end of each of the telescopic rods is fixedly connected with the bottom of the inner sliding block.

3. A device for separating silicon particles from waste liquid by floatation separation according to claim 2, characterized in that: The side shifting assembly includes a side blocking plate, the side blocking plate is slidably connected between the side surfaces of the two screening bins, the outer walls between the two screening bins are fixedly connected with a connecting frame, the inner wall of the connecting frame is inserted with an insertion rod, one end of the insertion rod is fixedly connected with the side surface of the side blocking plate, the side surface of the connecting frame is fixedly connected with the side surface of the side blocking plate through a spring, one end of the side blocking plate away from the bearing seat is fixedly connected with a pressing block in a symmetrical manner, and the end of the pressing block is attached to the inner side of the side blocking plate.

4. A device for separating silicon particles from waste liquid by flotation separation according to claim 3, characterized in that: The two sides of the side blocking plate are fixedly connected with protective plates, the inner sides between the protective plates are fixedly connected with material gathering plates in a symmetrical manner, the bottom of each of the material gathering plates is rotatably connected with a hinged seat, the shaft rods of the two hinged seats are fixedly connected with one end of the two flow guide plates respectively, and the outer side of the hinged seat is provided with a gear assembly for driving the shaft rod thereof to rotate.

5. A device for separating silicon particles from waste liquid by flotation separation according to claim 4, characterized in that: The gear assembly includes two straight toothed plates, the straight toothed plates are fixedly connected with the two sides of the screening bin respectively, the two ends of the shaft rod of the hinged seat are fixedly connected with gears one, the teeth of the two gears one can be engaged with the teeth of the straight toothed plates at the same time, the shaft rod of the hinged seat is rotatably connected with the inner wall of the protective plate, the top of the flotation box is fixedly connected with guide sliding seats in a symmetrical manner, and the side surface of the protective plate is fixedly connected with guide sliding blocks, the guide sliding blocks are slidably connected with the inner walls of the guide sliding seats.

6. A device for separating silicon particles from waste liquid by flotation separation according to claim 5, characterized in that: The inner walls between the screening bins are fixedly connected with limiting plates, and the upper surface of the screening mesh plate is provided with a limiting assembly for limiting the coarse silicon particles from being poured out in advance.

7. A device for the floatation separation of silicon particles from a waste liquid according to claim 6, characterised in that: The limiting assembly includes a rotating shaft, the rotating shaft is rotatably connected between the inner walls of the two pressing blocks, the outer wall of the rotating shaft is fixedly connected with a discharging plate, the two ends of the rotating shaft are fixedly connected with gears two, the inner walls of the screening bin are fixedly connected with arc-shaped toothed plates in a symmetrical manner, and the teeth of the gears two can be engaged with the teeth of the arc-shaped toothed plates.

8. A device for separating silicon particles from waste liquid by flotation separation according to claim 7, characterized in that: The side surface of the bearing seat is fixedly connected with a plurality of cleaning rods, the number of the cleaning rods corresponds to the number and positions of the mesh holes of the screening mesh plate, and the shape of the cleaning rods is matched with the inner wall of the mesh hole of the screening mesh plate.

9. A device for the floatation separation of silicon particles from a waste liquid according to claim 8, characterised in that: The inner wall of the processing bin one and the processing bin two is rotationally connected with a stirring rod, the outer wall of the stirring rod is fixedly connected with multiple stirring blades, the bottom of the stirring rod is fixedly connected with a differential gear, the teeth of the two differential gears are meshed with each other, the top of the base table is fixedly installed with a servo motor, and the output shaft of the servo motor is fixedly connected with one end of one of the stirring rods.

10. A device for the floatation separation of silicon particles from a waste liquid according to claim 9, characterised in that: The top of the base table is placed with an inflation tank, one side of the inflation tank is fixedly communicated with an air inlet pipe one and an air inlet pipe two, one end of the air inlet pipe one is fixedly communicated with the inside of the processing bin two, one end of the air inlet pipe two is fixedly communicated with the inside of the processing bin one, the outside of the air inlet pipe one and the air inlet pipe two is provided with an air extraction valve, and the inner diameter of the air inlet pipe one is larger than that of the air inlet pipe two.

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