Cleaning device for polycrystalline silicon purification pretreatment

Abstract

The invention provides a cleaning device for polycrystalline silicon purification pretreatment, and relates to the technical field of polycrystalline silicon cleaning equipment.The cleaning device comprises a water tank and a connecting box, one side of the water tank is provided with a feeding assembly, the feeding assembly comprises a hopper and a first discharging valve, the other side of the connecting box is provided with a pickling assembly, the pickling assembly comprises an acid box and an inclined pipe, and the inclined pipe is arranged in the acid box. The cleaning device for polycrystalline silicon purification pretreatment comprises a connecting box, a water tank and an acid box, a cleaning assembly is installed on the inner side of the water tank and comprises a net barrel and a spiral plate, and a driving assembly is installed on the acid box, and the cleaning device for polycrystalline silicon purification pretreatment can guarantee that the feeding speed of polycrystalline silicon in the connecting box and the acid box is larger than the discharging speed; the polycrystalline silicon is prevented from being gathered or accumulated in the connecting box or the acid box due to the influence, the influence of mutual interference of the accumulated polycrystalline silicon on washing and acid pickling effects is avoided, the cleaning effect on the polycrystalline silicon is guaranteed, meanwhile, the influence of excessive accumulation of the polycrystalline silicon on stable work of equipment is avoided, and the service life of the equipment is prolonged. The cleaning device is suitable for cleaning operation of polycrystalline silicon purification pretreatment work.

Description

Technical Field

[0001] The present invention relates to the technical field of cleaning equipment for polysilicon, and specifically to a cleaning device for pre-treatment of polysilicon purification. Background Art

[0002] Before purifying polysilicon, in order to reduce the impurities contained in the polysilicon, it is often necessary to clean the polysilicon. The invention patent with patent application number CN202211319070.4 discloses a pickling equipment for solar-grade polysilicon materials. A pickling roller and a mounting frame are provided, and the fixed axis of the pickling roller can be fixedly clamped by the mounting frame, and then the pickling roller is driven to rotate by the driving mechanism, and the pickling roller can vibrate back and forth. The silicon material will flip and vibrate with the rotation of the pickling roller, ensuring that the silicon material is always in a state of motion, thereby improving the efficiency of pickling. Liftable nozzles are provided on both sides of the pickling roller, and the nozzles can always Spraying the surface of the pickling roller can prevent the silicon material from getting stuck in the gap and make the silicon material and the acid liquid contact more fully, so as to achieve the purpose of pickling. A conveying mechanism is provided, and the pickling roller is fixedly clamped by a clamping mechanism. The electric telescopic rod realizes the lifting movement, and the pickling roller can be moved in and out by a slide rail. The invention patent with patent application number CN202311311179.8 discloses a pickling equipment for polycrystalline silicon materials. The electric telescopic rod works, thereby driving the longitudinal moving rod connected to the electric telescopic rod to move toward the direction close to the inclined guide plate. The lower transverse moving rod connected to the longitudinal moving rod drives the rotating gear to rotate through the rack three, thereby driving the rack two meshing with the rotating gear and the rack two connected to the rack. The upper transverse rod connected to the lower transverse rod makes a transverse movement toward the direction of the lower transverse rod, and the rack installed on the upper transverse rod drives the flip gear and the flip shaft connected to the flip gear to rotate. The flip shaft drives the drain plate to flip downward between the two inclined guide plates through the inclined support rod. The inclined guide plate is located in the drain chamber in an inclined state, and when the longitudinal rod drives the lower transverse rod to move toward the inclined guide plate, it synchronously drives the bow-shaped mounting frame to move toward the inclined guide plate. The guide block installed on the bow-shaped mounting frame guides the brush strip installed on the bow mounting frame to slide along the inclined end of the inclined guide plate. The brush strip completes the cleaning of the drain plate. In this way, the pickling brush attached to the surface of the drain plate can be washed back into the pickling tank to keep the surface of the drain plate clean. In order to ensure cleanliness, according to the disclosed technical solution, when the existing polysilicon cleaning equipment is in use, on the one hand, during the pickling process, impurities and dust on the surface of the polysilicon are likely to affect the pickling effect and increase the consumption of acid; on the other hand, when the polysilicon is subjected to initial washing, fine washing and continuous pickling, it is easy for the front-end feed speed to be greater than the processing rate in the middle and rear stages, which may easily cause the accumulation of polysilicon, which is not conducive to ensuring the stable operation of the equipment and reduces the cleaning effect of the polysilicon; on the other hand, after the pickling work is completed, more acid is often attached to the polysilicon, which not only causes a waste of acid, but also requires more clean water for rinsing. Summary of the invention

[0003] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a cleaning device for the pretreatment of polysilicon purification, so as to solve the problems put forward in the above background technology. The structure of the present invention is novel and has various functions, and is suitable for the cleaning operation of the pretreatment work of polysilicon purification.

[0004] To achieve the above purpose, the present invention is realized through the following technical solutions: A cleaning device for the pretreatment of polysilicon purification, including a water tank and a connecting box. One side of the water tank is equipped with a feeding component, and the feeding component includes a hopper and a first blanking valve. The other side of the connecting box is equipped with a pickling component, and the pickling component includes an acid tank and an inclined pipe. The inner side of the water tank is equipped with a cleaning component, and the cleaning component includes a mesh cylinder and a spiral plate. A driving component is installed on the acid tank, and the driving component includes a first motor and a second gear. A transmission component is installed on the connecting box, and the transmission component includes a main shaft and a first gear. The inner side of the water tank is equipped with a slag cleaning component, and the slag cleaning component includes a sleeve and a screw plate. A rotating component is installed on the connecting box, and the rotating component includes a second motor and a rotating rod. A filtering component is installed on the sleeve, and the filtering component includes a clamping sleeve and a filter cylinder.

[0005] Furthermore, the number of the mesh cylinders is 3. The three mesh cylinders are respectively installed on the inner sides of the water tank, the connecting box and the acid tank through bearings. The spiral plate is welded on the inner wall of the mesh cylinder. The diameter of one end of the mesh cylinder is larger than that of the other end. The hopper is installed on one side of the water tank through bolts. The first blanking valve is installed at the bottom of the hopper through bolts. The bottom of the first blanking valve is installed on the water tank through bolts, and the bottom of the first blanking valve is communicated with the inner side of the mesh cylinder.

[0006] Furthermore, the number of the inclined pipes is 2. One end of the two inclined pipes is respectively installed on the other sides of the water tank and the connecting box through bolts. The other ends of the two inclined pipes are respectively installed on one sides of the connecting box and the acid tank through bolts. The mesh cylinders are communicated through the inclined pipes. Tooth rings one, two and three are respectively welded on the outer sides of the three mesh cylinders. One end of the main shaft is installed on the top of the inner side of the water tank through a bearing. The other end of the main shaft passes through the connecting box through a bearing and is installed on the inner wall of the top of the acid tank through a bearing. A third gear, a fourth gear and a fifth gear are respectively welded on the outer side of the main shaft. The third gear, the fourth gear and the fifth gear are respectively located on the inner sides of the water tank, the connecting box and the acid tank. The third gear, the fourth gear and the fifth gear are respectively meshed with the tooth rings one, two and three, and the number of teeth of the third gear, the fourth gear and the fifth gear increases in turn.

[0007] Furthermore, the first motor is installed on the top of the acid tank through bolts. The second gear is key-connected to the output shaft of the first motor. The first gear is welded on the outer side of the main shaft. The first gear is stuck at the bottom of the second gear, and the second gear is meshed with the first gear.

[0008] Furthermore, the sleeve is respectively welded to the inner walls of the bottoms of the water tank and the connecting box. Funnels are welded to the inner walls of both the water tank and the connecting box. The top of one end of the sleeve communicates with the bottom of the funnel. The ferrule is welded to the other end of the sleeve. The filter cartridge is welded inside the ferrule. The second motor is installed on the outer side of the other side of the connecting box through bolts. One end of the rotating rod is key-connected to the output shaft of the second motor. Guide sleeves are welded to one side of both the connecting box and the water tank. The ferrule inside the connecting box communicates with one end of the sleeve inside the water tank through the guide sleeve. The other end of the rotating rod passes through the sleeve, the filter cartridge and the guide sleeve inside the connecting box, then passes through the sleeve and the filter cartridge inside the water tank and extends to the inside of the guide sleeve. The spiral plates are welded to the outer sides of both ends of the rotating rod. The outer sides of the spiral plates are respectively clamped to the inner walls of the sleeve and the filter cartridge.

[0009] Furthermore, a jacket is welded to the outer side of the guide sleeve. A locking pin is clamped inside the jacket. One end of the locking pin is connected to the inner wall of the jacket through a spring. The other end of the locking pin passes through the guide sleeve and extends to the inside of the guide sleeve. The other end of the locking pin is provided with an inclined surface. One side of the inclined surface is clamped to the outer side of the rotating rod. The other side of the inclined surface is flush with the inner wall of the guide sleeve.

[0010] Furthermore, a water pipe is installed on the other side of the connecting box. One end of the water pipe passes through the inclined pipe and the mesh cylinder and is installed on the inner wall of one side of the connecting box through bolts. A water pump is installed on one side of the connecting box through bolts. The water pump communicates with the ferrule inside the connecting box. A spray pipe is installed on the top of the water pump through bolts. One end of the spray pipe communicates with the top of the water pump. The other end of the spray pipe passes through the inclined pipe and the mesh cylinder and is installed on the inner wall of one side of the water tank through bolts. Sprayers are installed on both the water pipe and the spray pipe. The sprayers are all located inside the mesh cylinder. The sprayers are evenly distributed on the water pipe and the spray pipe.

[0011] Furthermore, a blowing cylinder is welded to the other side of the connecting box. One end of the blowing cylinder communicates with the outside of the connecting box. The other end of the blowing cylinder is close to the outer side of the bottom of the mesh cylinder inside the connecting box. A first blower is installed inside the blowing cylinder through bolts.

[0012] Furthermore, a drain port is installed on the other side of the acid tank through bolts. The drain port communicates with the mesh cylinder inside the acid tank. A guide plate is welded to the inner wall of the acid tank. The top of the guide plate is close to the bottom of the mesh cylinder. A ring sleeve is welded to the inner wall of the other side of the acid tank. A wind cylinder is welded to the top of the acid tank. The bottom of the wind cylinder passes through the acid tank and is welded to the top of the ring sleeve. The bottom of the wind cylinder communicates with the ring sleeve. A blowing ring is welded to the inner wall of the ring sleeve. The blowing ring is clamped to the outer side of the other end of the mesh cylinder.

[0013] Further, a cyclone is welded to the top of the acid tank. The bottom of the cyclone extends to the inside of the acid tank. A blanking valve II is installed at the bottom of the cyclone. A wind hood is welded to the top of one side of the acid tank. The bottom of the wind hood is communicated with the inside of the acid tank. The top of the wind hood is communicated with one side of the cyclone. The top of the air duct passes through the top of the cyclone and is communicated with the center of the cyclone. A blower II is installed on the inner wall of the air duct through bolts. Strong acid is contained inside the acid tank. The liquid level height of the strong acid is between the heights of the bottoms of both ends of the mesh cylinder.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. When the cleaning device for polysilicon purification pretreatment is in use, polysilicon raw materials are added to the inside of the hopper and fall into the inside of the mesh cylinder in the water tank through the blanking valve I. The motor I drives the main shaft to rotate through the meshing of the gear II and the gear I. The main shaft drives the mesh cylinders in the water tank, the connecting tank and the acid tank to rotate respectively through the gear III, the gear IV and the gear V. The polysilicon rotates and tumbles continuously in the mesh cylinder and is gradually pushed to the left by the spiral plate, and then is gradually sent into the inside of the mesh cylinders in the connecting tank and the acid tank through the inclined pipe in sequence. High-pressure clean water is introduced into the water pipe, and then the polysilicon cleaned in the connecting tank is rinsed through the spray head. The rinsed water falls into the inside of the sleeve. The motor II drives the screw plate to rotate through the rotating rod, and pushes the water and the rinsed debris and impurities to the inside of the filter cylinder. After the debris and impurities are filtered by the filter cylinder, the water enters the inside of the ferrule and is then pumped out by the water pump and pumped into the inside of the spray pipe, and then the polysilicon inside the mesh cylinder in the water tank is cleaned through the spray head. The water after the secondary cleaning falls into the inside of the sleeve in the water tank, and is then pushed to the inside of the filter cylinder by the screw plate and is filtered again and discharged outward. The impurities in the connecting tank are pushed by the extrusion of the screw plate, push the inclined surface on the pin through the pressure, and push the pin outward from the outer side of the rotating rod. The pin compresses the spring and moves into the inside of the jacket, so that the impurities are pushed to the inside of the sleeve in the water tank through the gap between the pin and the rotating rod by the extrusion of the screw plate, and then are pushed to the right by the screw plate, and then are extruded by the screw plate into the inside of the guide sleeve, and then are discharged outward after pushing open the pin, which can perform secondary cleaning work on the polysilicon, improve the cleanliness of the surface of the polysilicon, avoid attaching debris and impurities to the polysilicon, can improve the effect and efficiency of the pickling work, and can reduce the consumption of the acid liquid by the debris and impurities, and reduce the consumption of the acid liquid.

[0016] 2. When this cleaning device for polysilicon purification pretreatment is in use, after the polysilicon falls into the inner side of the mesh cylinder in the water tank through the feeding valve I, the third gear, the fourth gear and the fifth gear on the main shaft drive the mesh cylinders in the water tank, the connecting tank and the acid tank to rotate respectively. Since the number of teeth of the third gear, the fourth gear and the fifth gear increases in turn, the rotation speeds of the mesh cylinders in the water tank, the connecting tank and the acid tank increase in turn. As a result, the pushing speeds of the mesh cylinders in the water tank, the connecting tank and the acid tank for the polysilicon by the spiral plates increase in turn. Even if there is instability caused by the cleaning of the polysilicon in the connecting tank and the acid tank and obstacles to the drying work, it can ensure that the polysilicon can be smoothly conveyed to the left, and ensure that the feeding speed of the polysilicon in the connecting tank and the acid tank is greater than the discharging speed. Thus, it effectively avoids the aggregation or accumulation of the polysilicon in the connecting tank or the acid tank due to the above-mentioned influences, and effectively avoids the mutual interference of the accumulated polysilicon, which affects the flushing and pickling effects on it, ensures the cleaning effect of the polysilicon, and at the same time avoids affecting the stable operation of the equipment due to the excessive accumulation of the polysilicon.

[0017] 3. When this cleaning device for polysilicon purification pretreatment is in use, when the polysilicon rinsed clean with clear water is pushed into the acid tank through the spiral plate in the mesh cylinder, the first blower blows air towards the bottom of the left end of the mesh cylinder through the blowing cylinder. Thus, the moisture adsorbed on the surface of the polysilicon is effectively blown off. This can not only ensure the effective recycling of the moisture, but also avoid the moisture from reducing the concentration of the acid solution and ensure the pickling effect on the polysilicon. The polysilicon is pushed to the left by the spiral plate in the inner side of the acid tank. At the same time, the spiral plate pushes the acid solution, making the acid solution flow to the left in the inner side of the mesh cylinder, and falling to the left side of the acid tank through the left side of the mesh cylinder, then flowing to the right side of the acid tank through the bottom of the guide plate, and then flowing into the inner side of the mesh cylinder. As a result, the acid solution forms a circulating flow in the acid tank, ensuring full contact between the polysilicon and the acid solution and improving the pickling efficiency of the polysilicon. After pickling, the polysilicon is pushed to the left side of the mesh cylinder by the spiral plate. The second blower blows the air flow into the inner side of the ring sleeve through the air cylinder. The air flow blows out from the outer side of the left side of the mesh cylinder towards the inner side of the mesh cylinder through the blowing ring, effectively blowing off the acid solution attached to the mesh cylinder and the polysilicon, greatly reducing the acid solution attached to the polysilicon, reducing the waste of the acid solution, and reducing the water consumption for subsequent cleaning. The blown acid solution mist beads and the air flow are sucked into the air hood and conveyed to the inner side of the cyclone cylinder. The acid solution mist beads rotate and flow in the cyclone cylinder, and under the action of the centrifugal force, they adhere to the inner wall of the cyclone cylinder and fall into the inner side of the acid tank through the feeding valve II. The second blower extracts the air in the cyclone cylinder through the air cylinder and blows it into the inner side of the ring sleeve again, making the air flow for cleaning the acid solution circulate inside the acid tank, avoiding the air flow from driving the blown tiny acid solution mist beads to the outside of the acid tank, avoiding the waste of the acid solution and ensuring the safety of the surrounding environment, equipment and personnel. Description of the Drawings

[0018] Figure 1 This is a schematic structural diagram of a cleaning device for polysilicon purification pretreatment according to the present invention;

[0019] Figure 2 This is a sectional view of a cleaning device for polysilicon purification pretreatment according to the present invention;

[0020] Figure 3 This is a schematic structural diagram of the main shaft of a cleaning device for polysilicon purification pretreatment according to the present invention;

[0021] Figure 4 This is a schematic structural diagram of the connecting box of a cleaning device for polysilicon purification pretreatment according to the present invention;

[0022] Figure 5 This is a schematic structural diagram of the guide sleeve of a cleaning device for polysilicon purification pretreatment according to the present invention;

[0023] Figure 6 This is a schematic structural diagram of the acid box of a cleaning device for polysilicon purification pretreatment according to the present invention;

[0024] Figure 7 This is a schematic structural diagram of the ring sleeve of a cleaning device for polysilicon purification pretreatment according to the present invention;

[0025] In the figure: 1, water tank; 2, connecting box; 3, acid box; 4, hopper; 5, first blanking valve; 6, mesh cylinder; 7, spiral plate; 8, inclined pipe; 9, main shaft; 10, first gear; 11, first motor; 12, second gear; 13, third gear; 14, fourth gear; 15, fifth gear; 16, water pipe; 17, spray pipe; 18, sleeve; 19, ferrule; 20, filter cylinder; 21, water pump; 22, second motor; 23, rotating rod; 24, screw plate; 25, guide sleeve; 26, jacket; 27, pin; 28, spring; 29, blowing cylinder; 30, first fan; 31, ring sleeve; 32, air duct; 33, second fan; 34, cyclone; 35, air hood; 36, guide plate; 37, discharge port; 38, blowing ring. Detailed implementation manners

[0026] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below in conjunction with the specific implementation manners.

[0027] Please refer to Figures 1 to 7, the present invention provides a technical solution: a cleaning device for polysilicon purification pretreatment, including a water tank 1 and a connecting tank 2. One side of the water tank 1 is equipped with a feeding component, which includes a hopper 4 and a first blanking valve 5. The other side of the connecting tank 2 is equipped with a pickling component, which includes an acid tank 3 and an inclined pipe 8. The inner side of the water tank 1 is equipped with a cleaning component, which includes a mesh cylinder 6 and a spiral plate 7. A driving component is installed on the acid tank 3, which includes a first motor 11 and a second gear 12. A transmission component is installed on the connecting tank 2, which includes a main shaft 9 and a first gear 10. A slag cleaning component is installed on the inner side of the water tank 1, which includes a sleeve 18 and a screw plate 24. A rotating component is installed on the connecting tank, which includes a second motor 22 and a rotating rod 23. A filtering component is installed on the sleeve 18, which includes a clamping sleeve 19 and a filter cylinder 20. The number of the mesh cylinders 6 is 3, and the three mesh cylinders 6 are respectively installed on the inner sides of the water tank 1, the connecting tank 2 and the acid tank 3 through bearings. The spiral plate 7 is welded on the inner wall of the mesh cylinder 6. The diameter of one end of the mesh cylinder 6 is larger than that of the other end. The hopper 4 is installed on one side of the water tank 1 through bolts. The first blanking valve 5 is installed at the bottom of the hopper 4 through bolts. The bottom of the first blanking valve 5 is installed on the water tank 1 through bolts. The bottom of the first blanking valve 5 is communicated with the inner side of the mesh cylinder 6. The number of the inclined pipes 8 is 2. One ends of the two inclined pipes 8 are respectively installed on the other sides of the water tank 1 and the connecting tank 2 through bolts. The other ends of the two inclined pipes 8 are respectively installed on one sides of the connecting tank 2 and the acid tank 3 through bolts. The mesh cylinders 6 are communicated through the inclined pipes 8. Tooth rings one, two and three are respectively welded on the outer sides of the three mesh cylinders 6. One end of the main shaft 9 is installed on the top of the inner side of the water tank 1 through a bearing. The other end of the main shaft 9 passes through the connecting tank 2 through a bearing and is installed on the inner wall of the top of the acid tank 3 through a bearing. Gear three 13, gear four 14 and gear five 15 are respectively welded on the outer side of the main shaft 9. The gear three 13, gear four 14 and gear five 15 are respectively located inside the water tank 1, the connecting tank 2 and the acid tank 3. The gear three 13, gear four 14 and gear five 15 are respectively meshed with the tooth rings one, two and three. The number of teeth of the gear three 13, gear four 14 and gear five 15 increases in turn. When in use, after the polysilicon falls into the inner side of the mesh cylinder 6 in the water tank 1 through the first blanking valve 5, the gear three 13, gear four 14 and gear five 15 on the main shaft 9 respectively drive the mesh cylinders 6 in the water tank 1, the connecting tank 2 and the acid tank 3 to rotate. Since the number of teeth of the gear three 13, gear four 14 and gear five 15 increases in turn, the rotation speeds of the mesh cylinders 6 in the water tank 1, the connecting tank 2 and the acid tank 3 increase in turn. Furthermore, the pushing speeds of the mesh cylinders 6 in the water tank 1, the connecting tank 2 and the acid tank 3 on the polysilicon through the spiral plate 7 increase in turn, even if there is instability caused by the cleaning of the polysilicon in the connecting tank 2 and the acid tank 3, and the obstruction to the drying work thereof.It can also ensure that polysilicon can be smoothly conveyed to the left, and ensure that the feeding speed of polysilicon in the connecting box 2 and the acid box 3 is greater than the discharging speed, thereby effectively avoiding the aggregation or accumulation of polysilicon in the connecting box 2 or the acid box 3 due to the above-mentioned influences, and effectively avoiding the mutual interference of the accumulated polysilicon, which affects the flushing and pickling effects on it, ensuring the cleaning effect of polysilicon, and at the same time avoiding affecting the stable operation of the equipment due to the excessive accumulation of polysilicon.

[0028] In this embodiment, the first motor 11 is mounted on the top of the acid tank 3 by bolts. The second gear 12 is key-connected to the output shaft of the first motor 11. The first gear 10 is welded to the outer side of the main shaft 9. The first gear 10 is stuck at the bottom of the second gear 12. The second gear 12 meshes with the first gear 10. The sleeves 18 are respectively welded to the inner walls of the bottoms of the water tank 1 and the connecting tank 2. Funnels are welded on the inner walls of both the water tank 1 and the connecting tank 2. The top of one end of the sleeve 18 communicates with the bottom of the funnel. The clamping sleeve 19 is welded to the other end of the sleeve 18. The filter cartridge 20 is welded inside the clamping sleeve 19. The second motor 22 is mounted on the outer side of the other side of the connecting tank 2 by bolts. One end of the rotating rod 23 is key-connected to the output shaft of the second motor 22. Guide sleeves 25 are welded to one side of both the connecting tank 2 and the water tank 1. The clamping sleeve 19 inside the connecting tank 2 communicates with one end of the sleeve 18 inside the water tank 1 through the guide sleeve 25. The other end of the rotating rod 23 passes through the sleeve 18, the filter cartridge 20 and the guide sleeve 25 inside the connecting tank 2, then passes through the sleeve 18 and the filter cartridge 20 inside the water tank 1 and extends to the inside of the guide sleeve 25. The screw plates 24 are welded to the outer sides of both ends of the rotating rod 23. The outer sides of the screw plates 24 are respectively clamped to the inner walls of the sleeve 18 and the filter cartridge 20. A clamping sleeve 26 is welded to the outer side of the guide sleeve 25. A retaining pin 27 is clamped inside the clamping sleeve 26. One end of the retaining pin 27 is connected to the inner wall of the clamping sleeve 26 through a spring 28. The other end of the retaining pin 27 passes through the guide sleeve 25 and extends to the inside of the guide sleeve 25. The other end of the retaining pin 27 is provided with an inclined surface. One side of the inclined surface is clamped to the outer side of the rotating rod 23. The other side of the inclined surface is flush with the inner wall of the guide sleeve 25. A water pipe 16 is mounted on the other side of the connecting tank 2. One end of the water pipe 16 passes through the inclined pipe 8 and the mesh cylinder 6 and is mounted on the inner wall of one side of the connecting tank 2 by bolts. A water pump 21 is mounted on one side of the connecting tank 2 by bolts. The water pump 21 communicates with the clamping sleeve 19 inside the connecting tank 2. The top of the water pump 21 is mounted with a spray pipe 17 by bolts. One end of the spray pipe 17 communicates with the top of the water pump 21. The other end of the spray pipe 17 passes through the inclined pipe 8 and the mesh cylinder 6 and is mounted on the inner wall of one side of the water tank 1 by bolts. Sprayers are mounted on both the water pipe 16 and the spray pipe 17. The sprayers are all located inside the mesh cylinder 6. The sprayers are evenly distributed on the water pipe 16 and the spray pipe 17. When in use, polysilicon raw materials are added to the inside of the hopper 4 and fall into the inside of the mesh cylinder 6 in the water tank 1 through the first blanking valve 5. The first motor 11 drives the main shaft 9 to rotate through the meshing of the second gear 12 and the first gear 10. The main shaft 9 drives the mesh cylinders 6 in the water tank 1, the connecting tank 2 and the acid tank 3 to rotate respectively through the third gear 13, the fourth gear 14 and the fifth gear 15. The polysilicon rotates and tumbles continuously in the mesh cylinder 6 and is gradually pushed to the left by the spiral plate 7, and then is gradually fed into the inside of the mesh cylinders in the connecting tank 2 and the acid tank 3 through the inclined pipe 8 in turn. High-pressure clear water is introduced into the water pipe 16.Then, the rinsing work is carried out on the polysilicon cleaned in the connecting box 2 through the nozzle. The water after rinsing falls to the inside of the sleeve 18. The second motor 22 drives the screw plate 24 to rotate through the rotating rod 23, pushing the water and the rinsed debris and impurities to the inside of the filter cylinder 20. After the debris and impurities are filtered by the filter cylinder 20, the water enters the inside of the ferrule 19, is then pumped out by the water pump 21, and is pumped into the inside of the spray pipe 17. Then, the polysilicon inside the mesh cylinder 6 in the water tank 1 is cleaned through the nozzle. The water after the second cleaning falls to the inside of the sleeve 18 in the water tank 1, is then pushed to the inside of the filter cylinder 20 by the screw plate 24, and is discharged outward after being filtered again. The impurities in the connecting box 2 are pushed by the extrusion of the screw plate 24, pushing the inclined surface on the retaining pin 27 through pressure, and pushing the retaining pin 27 outward from the outer side of the rotating rod 23. The retaining pin 27 compresses the spring 28 and moves to the inside of the clamping sleeve 26. Thus, the impurities are pushed to the right through the gap between the retaining pin 27 and the rotating rod 23 under the extrusion of the screw plate 24 to the inside of the sleeve 18 in the water tank 1, are then pushed to the right by the screw plate 24, are extruded by the screw plate 24 to the inside of the guide sleeve 25, and are discharged outward after pushing open the retaining pin 27. It can carry out the secondary cleaning work on the polysilicon, improve the cleanliness of the surface of the polysilicon, avoid the attachment of debris and impurities on the polysilicon, which can not only improve the effect and efficiency of the pickling work, but also reduce the consumption of the acid solution by the debris and impurities, and reduce the consumption of the acid solution.

[0029] In this embodiment, a blowing tube 29 is welded to the other side of the connecting box 2. One end of the blowing tube 29 communicates with the outside of the connecting box 2, and the other end of the blowing tube 29 is closely attached to the outer side of the bottom of the mesh cylinder 6 inside the connecting box 2. A first blower 30 is installed inside the blowing tube 29 by bolts. A discharge port 37 is installed on the other side of the acid box 3 by bolts, and the discharge port 37 communicates with the mesh cylinder 6 inside the acid box 3. A guide plate 36 is welded to the inner wall of the acid box 3, and the top of the guide plate 36 is close to the bottom of the mesh cylinder 6. A collar 31 is welded to the inner wall on the other side of the acid box 3, and an air tube 32 is welded to the top of the acid box 3. The bottom of the air tube 32 passes through the acid box 3 and is welded to the top of the collar 31. The bottom of the air tube 32 communicates with the collar 31. A blowing ring 38 is welded to the inner wall of the collar 31, and the blowing ring 38 is clamped to the outer side of the other end of the mesh cylinder 6. A cyclone tube 34 is welded to the top of the acid box 3, and the bottom of the cyclone tube 34 extends to the inside of the acid box 3. A second blanking valve is installed at the bottom of the cyclone tube 34. An air hood 35 is welded to the top on one side of the acid box 3, and the bottom of the air hood 35 communicates with the inside of the acid box 3. The top of the air hood 35 communicates with one side of the cyclone tube 34. The top of the air tube 32 passes through the top of the cyclone tube 34 and is connected to the center of the cyclone tube 34. A second blower 33 is installed inside the air tube 32 by bolts. Strong acid is contained inside the acid box 3, and the liquid level height of the strong acid is between the heights of the bottoms of both ends of the mesh cylinder 6. During use, when the polysilicon washed clean with water is pushed into the acid box 3 through the spiral plate 7 inside the mesh cylinder 6, the first blower 30 blows air towards the bottom of the left end of the mesh cylinder 6 through the blowing tube 29, thereby effectively blowing off the moisture adsorbed on the surface of the polysilicon. This can not only ensure the effective recycling of moisture but also prevent the moisture from reducing the concentration of the acid solution and ensure the pickling effect on the polysilicon. The polysilicon is pushed leftward inside the acid box 3 by the spiral plate 7 inside the mesh cylinder 6. At the same time, the spiral plate 7 pushes the acid solution, causing the acid solution to flow leftward inside the mesh cylinder 6 and fall to the left side of the acid box 3 through the left side of the mesh cylinder 6, then flow to the right side of the acid box 3 through the bottom of the guide plate 36 and then flow back into the inside of the mesh cylinder 6. Thus, the acid solution forms a circulating flow inside the acid box 3, ensuring sufficient contact between the polysilicon and the acid solution and improving the pickling efficiency of the polysilicon. After pickling, the polysilicon is pushed by the spiral plate 7 to the left side of the mesh cylinder 6. The second blower 33 blows air flow into the inside of the collar 31 through the air tube 32, and the air flow blows out from the inner side of the outer side of the left side of the mesh cylinder 6 towards the inside of the mesh cylinder 6 through the blowing ring 38, thereby effectively blowing off the acid solution adhering to the mesh cylinder 6 and the polysilicon, greatly reducing the acid solution adhering to the polysilicon, reducing the waste of the acid solution, and also reducing the water consumption for subsequent cleaning. The blown-off acid solution mist beads and air flow are sucked into the air hood 35 and transported to the inside of the cyclone tube 34. The acid solution mist beads rotate and flow inside the cyclone tube 34 and adhere to the inner wall of the cyclone tube 34 under the action of centrifugal force.It then falls inside the acid tank 3 through the second blanking valve. The second blower 33 extracts the air inside the cyclone 34 through the air duct 32 and blows it again to the inside of the ring sleeve 31, thereby enabling the cleaning acid gas flow to circulate inside the acid tank 3, preventing the air flow from carrying the tiny acid mist droplets blown off to the outside of the acid tank 3, avoiding the waste of acid liquid, and ensuring the safety of the surrounding environment, equipment and personnel.

[0030] The cleaning device for polysilicon purification pretreatment provides electrical energy for all electrical equipment through an external power supply. When in use, polysilicon raw materials are added to the inside of the hopper 4 and fall into the inside of the mesh cylinder 6 in the water tank 1 through the first blanking valve 5. The first motor 11 drives the main shaft 9 to rotate through the meshing of the second gear 12 and the first gear 10. The main shaft 9 drives the mesh cylinders 6 in the water tank 1, the connecting box 2, and the acid tank 3 to rotate respectively through the third gear 13, the fourth gear 14, and the fifth gear 15. The polysilicon rotates and tumbles continuously in the mesh cylinder 6 and is gradually pushed to the left by the spiral plate 7, and then is gradually fed into the inside of the mesh cylinders in the connecting box 2 and the acid tank 3 through the inclined pipe 8 in sequence. High-pressure clean water is introduced into the water pipe 16, and then the polysilicon cleaned in the connecting box 2 is rinsed through the spray head. The rinsed water falls into the inside of the sleeve 18. The second motor 22 drives the screw plate 24 to rotate through the rotating rod 23, and pushes the water and the rinsed debris and impurities to the inside of the filter cylinder 20. After the debris and impurities are filtered by the filter cylinder 20, the water enters the inside of the ferrule 19, is then pumped out by the water pump 21, and is pumped into the inside of the spray pipe 17, and then the polysilicon inside the mesh cylinder 6 in the water tank 1 is cleaned through the spray head. The water after the second cleaning falls into the inside of the sleeve 18 in the water tank 1, is then pushed to the inside of the filter cylinder 20 by the screw plate 24, and is filtered again and discharged outwards. The impurities in the connecting box 2 are pushed under the extrusion of the screw plate 24, push the inclined surface on the retaining pin 27 through pressure, and push the retaining pin 27 outwards from the outer side of the rotating rod 23. The retaining pin 27 compresses the spring 28 and moves into the inside of the clamping sleeve 26. Thus, the impurities are pushed to the right through the gap between the retaining pin 27 and the rotating rod 23 under the extrusion of the screw plate 24 and move into the inside of the sleeve 18 in the water tank 1, are then pushed to the right by the screw plate 24, are then extruded into the inside of the guide sleeve 25 by the screw plate 24, and are discharged outwards after pushing open the retaining pin 27. It can perform secondary cleaning on polysilicon, improve the cleanliness of the surface of polysilicon, avoid the attachment of debris and impurities on polysilicon, can both improve the effect and efficiency of the pickling work, and can reduce the consumption of debris and impurities on the acid solution, reduce the consumption of acid solution. After the polysilicon falls into the inside of the mesh cylinder 6 in the water tank 1 through the first blanking valve 5, the third gear 13, the fourth gear 14, and the fifth gear 15 on the main shaft 9 drive the mesh cylinders 6 in the water tank 1, the connecting box 2, and the acid tank 3 to rotate respectively. Since the number of teeth of the third gear 13, the fourth gear 14, and the fifth gear 15 increases in sequence, the rotation speeds of the mesh cylinders 6 in the water tank 1, the connecting box 2, and the acid tank 3 increase in sequence, and then the pushing speeds of the mesh cylinders 6 in the water tank 1, the connecting box 2, and the acid tank 3 on the polysilicon through the spiral plate 7 increase in sequence. Even if there is instability caused by the cleaning of polysilicon in the connecting box 2 and the acid tank 3 and the obstruction of the drying work, it can ensure that the polysilicon can be smoothly conveyed to the left, and ensure that the feeding speed of the polysilicon in the connecting box 2 and the acid tank 3 is greater than the discharging speed, thus effectively avoiding the aggregation or accumulation of polysilicon in the connecting box 2 or the acid tank 3 due to the above influences.Furthermore, it can effectively avoid the interference between the stacked polysilicon, which affects the flushing and pickling effects, ensure the cleaning effect of polysilicon, and avoid affecting the stable operation of the equipment due to excessive stacking of polysilicon. When the polysilicon washed clean by clear water is pushed into the acid tank 3 through the spiral plate 7 in the mesh cylinder 6, the first blower 30 blows air towards the bottom of the left end of the mesh cylinder 6 through the blowing cylinder 29, thereby effectively blowing off the moisture adsorbed on the surface of the polysilicon. This can not only ensure the effective recycling of moisture but also avoid the reduction of the acid solution concentration by moisture, ensuring the pickling effect of polysilicon. The polysilicon is pushed leftward inside the acid tank 3 by the spiral plate 7 in the mesh cylinder 6. At the same time, the spiral plate 7 pushes the acid solution, causing the acid solution to flow leftward inside the mesh cylinder 6 and fall to the left side of the acid tank 3 through the left side of the mesh cylinder 6, then flow to the right side of the acid tank 3 through the bottom of the guide plate 36 and then flow into the inside of the mesh cylinder 6. As a result, the acid solution forms a circulating flow in the acid tank 3, ensuring sufficient contact between the polysilicon and the acid solution and improving the pickling efficiency of polysilicon. After pickling, the polysilicon is pushed to the left side of the mesh cylinder 6 by the spiral plate 7. The second blower 33 blows air flow into the inside of the collar 31 through the air cylinder 32. The air flow blows from the outer side of the left side of the mesh cylinder 6 towards the inside of the mesh cylinder 6 through the blowing ring 38, thereby effectively blowing off the acid solution attached to the mesh cylinder 6 and the polysilicon, greatly reducing the acid solution attached to the polysilicon, reducing the waste of acid solution, and reducing the water consumption for subsequent cleaning. The blown acid solution mist beads and air flow are sucked into the air hood 35 and transported to the inside of the cyclone cylinder 34. The acid solution mist beads rotate and flow inside the cyclone cylinder 34 and adhere to the inner wall of the cyclone cylinder 34 under the action of centrifugal force, and fall into the inside of the acid tank 3 through the second blanking valve. The second blower 33 extracts the air inside the cyclone cylinder 34 through the air cylinder 32 and blows it into the inside of the collar 31 again, so that the air flow for cleaning the acid solution circulates inside the acid tank 3, avoiding the air flow from driving the tiny blown acid solution mist beads outside the acid tank 3, thus avoiding the waste of acid solution and ensuring the safety of the surrounding environment, equipment, and personnel.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any regard, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to embrace all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0032] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cleaning device for the pretreatment of polysilicon purification, comprising a water tank (1) and a connecting tank (2). One side of the water tank (1) is equipped with a feeding assembly, and the feeding assembly includes a hopper (4) and a first feeding valve (5). The other side of the connecting tank (2) is equipped with a pickling assembly, and the pickling assembly includes an acid tank (3) and an inclined pipe (8), characterized in that: A cleaning component is installed inside the water tank (1). The cleaning component includes a mesh cylinder (6) and a spiral plate (7). A driving component is installed on the acid tank (3). The driving component includes a first motor (11) and a second gear (12). A transmission component is installed on the connecting tank (2). The transmission component includes a main shaft (9) and a first gear (10). A slag cleaning component is installed inside the water tank (1). The slag cleaning component includes a sleeve (18) and a screw plate (24). A rotating component is installed on the connecting tank (). The rotating component includes a second motor (22) and a rotating rod (23). A filtering component is installed on the sleeve (18). The filtering component includes a ferrule (19) and a filter cylinder (20).

2. The cleaning device for polysilicon purification pretreatment according to claim 1, characterized in that: The number of the mesh cylinders (6) is three. The three mesh cylinders (6) are respectively installed inside the water tank (1), the connecting tank (2) and the acid tank (3) through bearings. The spiral plate (7) is welded to the inner wall of the mesh cylinder (6). The diameter of one end of the mesh cylinder (6) is larger than that of the other end. The hopper (4) is installed on one side of the water tank (1) through bolts. The first blanking valve (5) is installed at the bottom of the hopper (4) through bolts. The bottom of the first blanking valve (5) is installed on the water tank (1) through bolts. The bottom of the first blanking valve (5) is communicated with the inside of the mesh cylinder (6).

3. The cleaning device for polysilicon purification pretreatment according to claim 2, wherein: The number of the inclined pipes (8) is two. One ends of the two inclined pipes (8) are respectively installed on the other sides of the water tank (1) and the connecting tank (2) through bolts. The other ends of the two inclined pipes (8) are respectively installed on one sides of the connecting tank (2) and the acid tank (3) through bolts. The mesh cylinders (6) are communicated through the inclined pipes (8). Tooth rings one, two and three are respectively welded to the outer sides of the three mesh cylinders (6). One end of the main shaft (9) is installed at the top inside the water tank (1) through a bearing. The other end of the main shaft (9) passes through the connecting tank (2) through a bearing and is installed on the inner wall of the top of the acid tank (3) through a bearing. Gear wheels three (13), four (14) and five (15) are respectively welded to the outer side of the main shaft (9). The gear wheels three (13), four (14) and five (15) are respectively located inside the water tank (1), the connecting tank (2) and the acid tank (3). The gear wheels three (13), four (14) and five (15) are respectively meshed with the tooth rings one, two and three. The number of teeth of the gear wheels three (13), four (14) and five (15) increases in sequence.

4. The cleaning device for polysilicon purification pretreatment according to claim 3, characterized in that: The first motor (11) is installed on the top of the acid tank (3) through bolts. The second gear (12) is key-connected to the output shaft of the first motor (11). The first gear (10) is welded to the outer side of the main shaft (9). The first gear (10) is stuck at the bottom of the second gear (12). The second gear (12) is meshed with the first gear (10).

5. A cleaning device for polysilicon purification pretreatment according to claim 1, characterized in that: The sleeve (18) is welded to the inner walls of the bottoms of the water tank (1) and the connecting box (2) respectively. Funnels are welded to the inner walls of the water tank (1) and the connecting box (2). The top of one end of the sleeve (18) is communicated with the bottom of the funnel. The ferrule (19) is welded to the other end of the sleeve (18). The filter cartridge (20) is welded to the inner side of the ferrule (19). The second motor (22) is installed on the outer side of the other side of the connecting box (2) by bolts. One end of the rotating rod (23) is key-connected to the output shaft of the second motor (22). Guide sleeves (25) are welded to one side of both the connecting box (2) and the water tank (1). The ferrule (19) in the connecting box (2) is communicated with one end of the sleeve (18) in the water tank (1) through the guide sleeve (25). The other end of the rotating rod (23) passes through the sleeve (18), the filter cartridge (20) and the guide sleeve (25) in the connecting box (2), then passes through the sleeve (18) and the filter cartridge (20) in the water tank (1) and extends to the inner side of the guide sleeve (25). The spiral plates (24) are welded to the outer sides of both ends of the rotating rod (23). The outer sides of the spiral plates (24) are respectively clamped on the inner walls of the sleeve (18) and the filter cartridge (20).

6. The cleaning device for polysilicon purification pretreatment according to claim 5, wherein: A jacket (26) is welded to the outer side of the guide sleeve (25). A retaining pin (27) is clamped inside the jacket (26). One end of the retaining pin (27) is connected to the inner wall of the jacket (26) through a spring (28). The other end of the retaining pin (27) passes through the guide sleeve (25) and extends to the inner side of the guide sleeve (25). The other end of the retaining pin (27) is provided with an inclined surface. One side of the inclined surface is clamped on the outer side of the rotating rod (23), and the other side of the inclined surface is flush with the inner wall of the guide sleeve (25).

7. A cleaning device for polysilicon purification pretreatment according to claim 6, characterized in that: A water pipe (16) is installed on the other side of the connecting box (2). One end of the water pipe (16) passes through the inclined pipe (8) and the mesh cylinder (6) and is installed on the inner wall of one side of the connecting box (2) by bolts. A water pump (21) is installed on one side of the connecting box (2) by bolts. The water pump (21) is communicated with the ferrule (19) in the connecting box (2). A spray pipe (17) is installed on the top of the water pump (21) by bolts. One end of the spray pipe (17) is communicated with the top of the water pump (21). The other end of the spray pipe (17) passes through the inclined pipe (8) and the mesh cylinder (6) and is installed on the inner wall of one side of the water tank (1) by bolts. Sprayers are installed on both the water pipe (16) and the spray pipe (17). The sprayers are all located inside the mesh cylinder (6). The sprayers are evenly distributed on the water pipe (16) and the spray pipe (17).

8. A cleaning device for polysilicon purification pretreatment according to claim 7, characterized in that: A blowing cylinder (29) is welded to the other side of the connecting box (2). One end of the blowing cylinder (29) is communicated with the outer side of the connecting box (2). The other end of the blowing cylinder (29) is closely attached to the outer side of the bottom of the mesh cylinder (6) in the connecting box (2). A first fan (30) is installed inside the blowing cylinder (29) by bolts.

9. The cleaning device for polysilicon purification pretreatment according to claim 8, wherein: On the other side of the acid tank (3), a discharge port (37) is installed by bolts. The discharge port (37) is communicated with the mesh cylinder (6) inside the acid tank (3). A guide plate (36) is welded on the inner wall of the acid tank (3). The top of the guide plate (36) is close to the bottom of the mesh cylinder (6). A ring sleeve (31) is welded on the inner wall on the other side of the acid tank (3). A wind cylinder (32) is welded on the top of the acid tank (3). The bottom of the wind cylinder (32) passes through the acid tank (3) and is welded on the top of the ring sleeve (31). The bottom of the wind cylinder (32) is communicated with the ring sleeve (31). A blowing ring (38) is welded on the inner wall of the ring sleeve (31). The blowing ring (38) is clamped on the outer side of the other end of the mesh cylinder (6).

10. A cleaning device for polysilicon purification pretreatment according to claim 9, characterized in that: A cyclone cylinder (34) is welded on the top of the acid tank (3). The bottom of the cyclone cylinder (34) extends to the inside of the acid tank (3). A second blanking valve is installed at the bottom of the cyclone cylinder (34). A wind hood (35) is welded on the top of one side of the acid tank (3). The bottom of the wind hood (35) is communicated with the inside of the acid tank (3). The top of the wind hood (35) is communicated with one side of the cyclone cylinder (34). The top of the wind cylinder (32) passes through the top of the cyclone cylinder (34) and is communicated with the center of the cyclone cylinder (34). A second fan (33) is installed on the inner wall of the wind cylinder (32) by bolts. Strong acid is contained inside the acid tank (3). The liquid level height of the strong acid is between the heights of the bottoms of the two ends of the mesh cylinder (6).

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