Recycling device for polycrystalline silicon water tank backing material

Abstract

The invention discloses a polycrystalline silicon water tank backing material recovery device, relates to the technical field of polycrystalline silicon production, and aims to improve the recovery efficiency of crushed aggregates at the bottom of a water tank. According to the main technical scheme, the recycling device for the polycrystalline silicon water tank backing material is characterized in that an upper end opening of a second tank body is connected to one side of the bottom wall of a first tank body; the two driving mechanisms are symmetrically arranged on the opposite inner sides of the first box body, the two first guide wheels are installed above the first box body, the two second guide wheels are installed at the lower end of the side wall of the first box body, the scraping plate is located between the two second guide wheels, the driving roller is located between the two first guide wheels, and a spiral groove is formed in the shaft side of the driving roller. The tensioning rope is wound in the spiral groove, and the end of the tensioning rope sequentially skims over the first guide wheel and the second guide wheel and is fixedly connected to the plate face of the scraper. The lower end of the first screening box is matched with the upper end opening of the first box body, and the lower end of the second screening box is matched with the upper end opening of the second box body.

Description

Technical Field

[0001] This invention relates to the field of polysilicon production technology, and in particular to a device for recycling the bottom material of polysilicon water tanks. Background Technology

[0002] With the continuous development of polysilicon product finishing processes, water quenching technology has emerged, aiming to rapidly cool high-temperature silicon rods and release internal stress. Traditional methods rely on manual operation, resulting in low efficiency and product quality degradation due to residual moisture.

[0003] In recent years, automated water quenching systems have been gradually applied. Polycrystalline silicon rods are first heated, and then immersed in pure water tanks for rapid cooling. During the rapid cooling process, fragments are generated. Therefore, the collection of fragments from the bottom of the pure water tank is an important step in the polycrystalline silicon production process. The pure water tank is emptied first, and then personnel enter the bottom of the tank to collect the fragments. The manual collection method requires operators to enter a confined space, which poses safety risks, is inefficient, easily misses small fragments, and causes water quality fluctuations, affecting subsequent production and increasing water consumption per unit of product. Summary of the Invention

[0004] In view of this, the present invention provides a recycling device for polycrystalline silicon water tank bottom material, the main purpose of which is to improve the recycling efficiency of the bottom material of the water tank.

[0005] To achieve the above objectives, the present invention mainly provides the following technical solutions:

[0006] The present invention provides a device for recycling polycrystalline silicon water tank bottom material, the device comprising: a water tank, a scraping section and a picking section;

[0007] The water tank includes a first tank and a second tank, with the upper port of the second tank connected to one side of the bottom wall of the first tank;

[0008] The scraping section includes a scraper and two driving mechanisms. The two driving mechanisms are symmetrically arranged on opposite inner sides of the first housing. Each driving mechanism includes a tension rope, a driving roller, two first guide wheels, and two second guide wheels. The two first guide wheels are installed on the top of the first housing, and the two second guide wheels are installed on the lower side wall of the first housing. The scraper is located between the two second guide wheels, and the driving roller is located between the two first guide wheels. The driving roller has a spiral groove on its axial side, and the tension rope is wound in the spiral groove. The end of the tension rope passes over the first guide wheel and the second guide wheel in sequence and is fixedly connected to the surface of the scraper.

[0009] The picking unit includes a first screening box and a second screening box. The lower end of the first screening box matches the upper opening of the first box body, and the lower end of the second screening box matches the upper opening of the second box body. The bottom wall of the first screening box has a plurality of first sieve holes arranged in a matrix, and the bottom wall of the second screening box has a plurality of second sieve holes arranged in a matrix. The aperture of the second sieve holes is smaller than the aperture of the first sieve holes.

[0010] The objectives of this invention and the technical problems it addresses can be further achieved by the following technical measures.

[0011] Optionally, it also includes two first winches, two second winches, and a first baffle. The first winches and second winches are respectively installed above the first housing. One end of the first screening box has a first chute on its opposite sidewall. The lifting rope of the first winch is connected to the first chute through a first hook. The lifting ropes of the two second winches are fixedly connected to the opposite sidewall of the other end of the first screening box. The other end wall of the first screening box has a first discharge port. The upper side of the first baffle is rotatably connected to the first discharge port. The lower side of the first baffle is equipped with a first magnetic attraction mechanism for controlling the closing of the first discharge port.

[0012] Optionally, the system also includes a third winch, a fourth winch, and a second baffle. The third and fourth winches are respectively installed above the first housing. A second chute is provided on the opposite sidewall of one end of the second screening box. The lifting ropes of the third and fourth winches pass through the first screen holes. The lifting rope of the third winch is connected to the second chute via a second hook. The lifting rope of the fourth winch is fixedly connected to the opposite sidewall of the other end of the second screening box. The first end of the tension rope passes through the first screen hole and is offset from the second screening box. A second discharge port is provided on the other end wall of the second screening box. The upper side of the second baffle is rotatably connected to the second discharge port. A second magnetic attraction mechanism is installed on the lower side of the second baffle to control the closing of the second discharge port.

[0013] Optionally, the lifting ropes of the third winch, the fourth winch, the second winch, and the tension rope passing through the first screen hole are coplanar.

[0014] Optionally, it may also include a plurality of support rods, which are arranged horizontally in sequence within the first housing above the scraper.

[0015] Optionally, the upper port of the second housing is provided with an inclined surface.

[0016] Optionally, the aperture of the first sieve hole is 50 mm, and the aperture of the second sieve hole is 10 mm.

[0017] Optionally, it also includes a transfer unit, which includes a chassis, a lifting frame and a flower basket. The flower basket has a loading port on its axial side, and a central shaft is installed on each of the two ends of the flower basket. The chassis is equipped with wheels, one end of the chassis is fixedly connected to the lower end of the lifting frame, and the upper end of the lifting frame is fixedly connected to two semicircular rings, which fit into the central shaft.

[0018] Optionally, it also includes an arc-shaped rack, which is fixedly connected to the side of the support frame, and the two ends of the flower basket are gear disks, with the arc-shaped rack fitting into the gear disks.

[0019] Optionally, a counterweight is also included, which is installed at the other end of the chassis.

[0020] By employing the above technical solution, the present invention has at least the following advantages:

[0021] When using this device, first place the second screening box into the second housing, then place the first screening box into the first housing, with the scraper located at the far end of the second housing.

[0022] Based on this, the heated polycrystalline silicon rod is immersed in the water in the first chamber for rapid cooling. Large pieces of material are intercepted by the first screening box, while small pieces of material pass through the first screen holes and sink to the bottom wall of the first chamber.

[0023] Based on this, the drive roller is activated, which drives the tension rope to travel along the spiral groove. Through the constraints of the first guide wheel and the second guide wheel, the tension rope at the bottom of the first box is horizontally driven, thereby causing the scraper to move towards the second box, thus causing the scraper to push the small pieces of material on the bottom wall of the first box to concentrate in the second screening box.

[0024] Once the above steps are completed, the first and second screening boxes can be removed from the water tank in sequence, facilitating the subsequent recycling of polysilicon fragments.

[0025] Using this device, there is no need to drain the water from the tank or allow personnel to enter the tank, thus improving the efficiency of waste material recycling. Attached Figure Description

[0026] Figure 1 A perspective view of a polycrystalline silicon water tank bottom material recycling device provided in an embodiment of the present invention;

[0027] Figure 2 A front view of a polycrystalline silicon water tank bottom material recycling device provided in an embodiment of the present invention;

[0028] Figure 3 A side view of a polycrystalline silicon water tank bottom material recycling device provided in an embodiment of the present invention;

[0029] Figure 4 This is an assembly drawing of the drive roller and drive motor.

[0030] Figure 5 This is a side view of the transfer section;

[0031] Figure 6 This is a front view of the transfer section;

[0032] Figure 7 A three-dimensional image of a flower basket;

[0033] Figure 8 A diagram showing the coordination between the transfer department, flower baskets, and the washing and drying processes;

[0034] Figure 9 for Figure 2 Enlarged view of section A;

[0035] Figure 10 for Figure 5 Enlarged view of section B;

[0036] Figure 11 This is a schematic diagram of the synchronous control principle of the drive motors for two drive mechanisms.

[0037] The reference numerals in the accompanying drawings include: 1. First box body; 2. Second box body; 3. Scraper; 4. Tensioning rope; 5. Drive roller; 6. First guide wheel; 7. Second guide wheel; 8. Spiral groove; 9. First screening box; 10. Second screening box; 11. Drive motor; 12. First winch; 13. Second winch; 14. First baffle; 15. First chute; 16. First electromagnet; 17. First iron block; 18. Third winch; 19. Fourth winch; 20. Second baffle; 21. Second chute; 22. Support rod; 23. Inclined surface; 24. Chassis; 25. Lifting frame; 26. Flower basket; 27. Loading port; 28. Central shaft; 29. ​​Semicircular ring; 30. Mechanical arm; 31. Rinsing tank; 32. Ultrasonic rinsing tank; 33. Microwave drying oven; 34. Plastic cover; 35. Arc rack; 36. Gear disk; 37. Counterweight. Detailed Implementation

[0038] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific embodiments, structures, features, and effects according to the present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0039] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0040] like Figures 1 to 4As shown, an embodiment of the present invention provides a device for recycling polycrystalline silicon water tank bottom material, which includes: a water tank, a scraping section and a picking section;

[0041] The water tank includes a first tank body 1 and a second tank body 2, with the upper port of the second tank body 2 connected to one side of the bottom wall of the first tank body 1;

[0042] The scraping section includes a scraper 3 and two driving mechanisms. The two driving mechanisms are symmetrically arranged on opposite inner sides of the first housing 1. Each driving mechanism includes a tension rope 4, a driving roller 5, two first guide wheels 6 and two second guide wheels 7. The two first guide wheels 6 are installed above the first housing 1, and the two second guide wheels 7 are installed at the lower end of the side wall of the first housing 1. The scraper 3 is located between the two second guide wheels 7, and the driving roller 5 is located between the two first guide wheels 6. The driving roller 5 has a spiral groove 8 on its axial side. The tension rope 4 is wound in the spiral groove 8. The end of the tension rope 4 passes over the first guide wheel 6 and the second guide wheel 7 in sequence and is fixedly connected to the surface of the scraper 3.

[0043] The picking unit includes a first screening box 9 and a second screening box 10. The lower end of the first screening box 9 matches the upper opening of the first box body 1, and the lower end of the second screening box 10 matches the upper opening of the second box body 2. The bottom wall of the first screening box 9 has a plurality of first sieve holes arranged in a matrix, and the bottom wall of the second screening box 10 has a plurality of second sieve holes arranged in a matrix. The aperture of the second sieve holes is smaller than the aperture of the first sieve holes.

[0044] The working process of a polycrystalline silicon water tank bottom material recycling device is as follows:

[0045] When using this device, first place the second screening box 10 into the second box 2, then place the first screening box 9 into the first box 1, with the scraper 3 located at the far end of the second box 2.

[0046] Based on this, the heated polycrystalline silicon rod is immersed in water in the first box 1 for rapid cooling. Large pieces of material are intercepted by the first screening box 9, while small pieces of material pass through the first screen holes and sink to the bottom wall of the first box 1.

[0047] Based on this, the drive roller 5 is started, and the drive roller 5 drives the tension rope 4 to drive along the spiral groove 8. Through the constraint of the first guide wheel 6 and the second guide wheel 7, the tension rope 4 at the bottom of the first box 1 is driven horizontally, so that the scraper 3 moves towards the direction of the second box 2, so that the scraper 3 pushes the small pieces of material on the bottom wall of the first box 1 to concentrate in the second screening box 10.

[0048] Once the above steps are completed, the first screening box 9 and the second screening box 10 can be sequentially removed from the water tank for subsequent recycling of polysilicon fragments.

[0049] Using this device, there is no need to drain the water from the tank or allow personnel to enter the tank, thus improving the efficiency of waste material recycling.

[0050] Specifically, the water tank, the first screening box 9, and the second screening box 10 are made of fiberglass, and the tensioning rope 4 is made of steel wire rope coated with plastic to prevent metal materials from being mixed into the silicon material products.

[0051] Specifically, it also includes a drive motor 11, the output shaft of which is coaxially connected to the drive roller 5, and the drive motor 11 is electrically connected to the controller.

[0052] like Figure 11 As shown, the drive motors 11 of the two drive mechanisms are the first drive motor and the second drive motor, respectively, and frequency converters are installed on the first drive motor and the second drive motor. The synchronization control method of the first drive motor and the second drive motor is as follows:

[0053] The first drive motor is the master drive, and the second drive motor is the slave drive. The specific wiring is shown in the figure. The first drive motor is M1, and the second drive motor is M2. The speed of the two drive motors 11 can be changed synchronously by adjusting the 10V DC voltage inside the frequency converter and the external potentiometers WK1 and WK2 connected to the two frequency converters, thereby controlling the synchronous transmission of the tension rope 4 of the two drive mechanisms.

[0054] like Figures 1 to 3 As shown, in a specific embodiment, it also includes two first winches 12, two second winches 13, and a first baffle 14. The first winches 12 and the second winches 13 are respectively installed above the first housing 1. One end of the screening box 9 is provided with a first chute 15 on opposite sidewalls. The lifting rope of the first winch 12 is connected to the first chute 15 through a first hook. The lifting ropes of the two second winches 13 are fixedly connected to the opposite sidewalls of the other end of the first screening box 9. The other end wall of the first screening box 9 is provided with a first discharge port. The upper side of the first baffle 14 is rotatably connected to the first discharge port. The lower side of the first baffle 14 is provided with a first magnetic attraction mechanism for controlling the closing of the first discharge port.

[0055] In this embodiment, specifically, after the large pieces of material are intercepted by the first screening box 9, the two first winches 12 and the two second winches 13 start simultaneously, driving the first screening box 9 to rise horizontally to the first position. The second winches 13 stop running, and the first winches 12 continue to lift one end of the first screening box 9 to the second position, so that the first discharge port is located at the lower end of the tilt direction of the first screening box 9. At this time, the power-on state of the first magnetic attraction mechanism is switched, and the first discharge port is opened to facilitate the discharge of large pieces of material.

[0056] The synchronization control method of the first winch 12 and the second winch 13 is the same as that of the synchronization control method of the first drive motor 11M1 and the second drive motor 11M2.

[0057] like Figure 9 As shown, specifically, the upper side of the first baffle 14 is pivotally hinged to the upper edge of the first discharge port. A first electromagnet 16 is provided on the lower side of the first baffle 14, and a first iron block 17 is provided on the lower edge of the first discharge port. The first electromagnet 16 and the first iron block 17 correspond to each other. The electromagnetic coil of the first electromagnet 16 is connected to the controller. When the controller adjusts the electromagnetic coil circuit to the closed state, the first electromagnet 16 attracts the first iron block 17, and the first baffle 14 closes the first discharge port. When the controller adjusts the electromagnetic coil circuit to the open state, the first electromagnet 16 does not attract the first iron block 17. As the first screening box 9 gradually tilts, the gap between the first baffle 14 and the first discharge port gradually increases, which facilitates the discharge of large pieces of broken material.

[0058] Specifically, the first electromagnet 16 and the first iron block 17 are respectively wrapped in a plastic coating to prevent the metal from contaminating the silicon material.

[0059] Specifically, when the first winch 12 continues to lift one end of the first screening box 9, the first hook slides adaptively within the first chute 15, so that the lifting rope of the first winch 12 always remains vertical.

[0060] like Figures 1 to 3 As shown, in a specific embodiment, it also includes a third winch 18, a fourth winch 19, and a second baffle 20. The third winch 18 and the fourth winch 19 are respectively installed above the first housing 1. The opposite sidewalls of one end of the second screening box 10 are respectively provided with second sliding grooves 21. The lifting ropes of the third winch 18 and the fourth winch 19 pass through the first screen hole. The lifting rope of the third winch 18 is connected to the second sliding groove 21 through a second hook. The lifting rope of the fourth winch 19 is fixedly connected to the opposite sidewall of the other end of the second screening box 10. The first end of the tension rope 4 passes through the first screen hole and is offset from the second screening box 10. The other end wall of the second screening box 10 is provided with a second discharge port. The upper side of the second baffle 20 is rotatably connected to the second discharge port. The lower side of the second baffle 20 is equipped with a second magnetic attraction mechanism for controlling the closing of the second discharge port.

[0061] In this embodiment, specifically, the lifting ropes of the third winch 18 and the fourth winch 19 pass through different first screen holes. This design allows the first screening box 9 to completely cover the second screening box 10, while the lifting of the second screening box 10 and the lifting of the first screening box 9 will not interfere with each other.

[0062] Specifically, when small pieces of material are collected in the second screening box 10, the third winch 18 and the fourth winch 19 start simultaneously, driving the second screening box 10 to rise horizontally to the third position. The fourth winch 19 stops running, and the third winch 18 continues to lift one end of the second screening box 10 to the fourth position, so that the second discharge port is located at the lower end of the tilt direction of the second screening box 10. At this time, the power-on state of the second magnetic attraction mechanism is switched, and the second discharge port is opened to facilitate the discharge of small pieces of material.

[0063] The synchronization control method of the third winch 18 and the fourth winch 19 is the same as that of the first drive motor 11M1 and the second drive motor 11M2.

[0064] Specifically, the upper side of the second baffle 20 is pivotally hinged to the upper edge of the second discharge port, and a second electromagnet is provided on the lower side of the second baffle 20. A second iron block is provided on the lower edge of the second discharge port. The second electromagnet and the second iron block correspond to each other, and the electromagnetic coil of the second electromagnet is connected to the controller. When the controller adjusts the electromagnetic coil circuit to the closed state, the second electromagnet attracts the second iron block, and the second baffle 20 closes the second discharge port. When the controller adjusts the electromagnetic coil circuit to the open state, the second electromagnet does not attract the second iron block. As the second screening box 10 gradually tilts, the gap between the second baffle 20 and the second discharge port gradually increases, which facilitates the discharge of small pieces of material.

[0065] Specifically, the second electromagnet and the second iron block are respectively wrapped in plastic coatings to avoid contamination of the silicon material.

[0066] Specifically, when the third winch 18 continues to lift one end of the second screening box 10 to the fourth position, the second hook can slide adaptively within the second chute 21, so that the lifting rope of the third winch 18 always remains vertical.

[0067] like Figures 1 to 3 As shown, in a specific embodiment, the lifting rope of the third winch 18, the lifting rope of the fourth winch 19, the lifting rope of the second winch 13, and the tension rope 4 passing through the first screen hole are all in the same plane.

[0068] In this embodiment, specifically, the lifting ropes of the two second winches 13 and a certain row of first screen holes on the bottom wall of the first screening box 9 are coplanar, and the lifting rope of the third winch 18, the lifting rope of the fourth winch 19 and the tension rope 4 respectively pass through one of the first screen holes in that row.

[0069] With the above settings, when the first screening box 9 is lifted, the first winch 12 and the second winch 13 work together, and the lifting ropes of the first winch 12 and the second winch 13 are always in a vertical state. During the tilting process of the first screening box 9, the lifting ropes of the third winch 18, the fourth winch 19 and the tension rope 4 will not be interfered with by the first screening box 9.

[0070] like Figure 2 As shown, in a specific embodiment, it also includes a plurality of support rods 22, which are arranged horizontally in sequence within the first housing 1 above the scraper 3.

[0071] In this embodiment, specifically, multiple support rods 22 are arranged above the scraper 3, and the two ends of each support rod 22 are respectively fixedly connected to the opposite side wall of the first box 1, limiting the lower limit position of the movement of the first screening box 9 and preventing the first screening box 9 and the scraper 3 from contacting each other.

[0072] like Figure 2 As shown in the specific embodiment, the upper port periphery of the second housing 2 is provided with an inclined surface 23.

[0073] In this embodiment, when the scraper 3 moves the small pieces of material at the bottom of the first box 1 closer to the upper port of the second box 2, the small pieces of material can eventually roll down into the second box 2 along the inclined surface 23, so that the small pieces of material can be concentrated into the second screening box 10.

[0074] In a specific embodiment, the aperture of the first sieve hole is 50 mm, and the aperture of the second sieve hole is 10 mm.

[0075] In this embodiment, polycrystalline silicon fragments of different sizes are collected by classifying them according to the size of the sieve aperture. Since the fragments need to be dried later, and the drying time varies for fragments of different sizes, they are collected by classifying them through the first screening box 9 and the second screening box 10 to facilitate subsequent classification and processing.

[0076] like Figure 2 , Figure 3 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, in a specific embodiment, it also includes a transfer unit, which includes a chassis 24, a lifting frame 25, and a flower basket 26. The flower basket 26 has a loading port 27 on its axial side. A central shaft 28 is installed on each of the two end faces of the flower basket 26. The chassis 24 is equipped with wheels. One end of the chassis 24 is fixedly connected to the lower end of the lifting frame 25. The upper end of the lifting frame 25 is fixedly connected to two semicircular rings 29. The semicircular rings 29 fit into the central shaft 28.

[0077] In this embodiment, specifically, when the first screening box 9 or the second screening box 10 is tilted, the operator can hold the handle and push the chassis 24 to push the basket 26 below the first discharge port or the second discharge port. Then, the first screening box 9 or the second screening box 10 is tilted to discharge the material. The broken material enters the basket 26 through the loading port 27. When the basket 26 is full of broken material, the operator can move the chassis 24 to transfer the basket 26 to the cleaning and drying process. The robotic arm 30 hooks the central shaft 28 and transfers the basket 26 to the rinsing tank 31, the ultrasonic rinsing tank 32, and the microwave drying oven 33 in sequence for cleaning and drying of polycrystalline silicon broken material.

[0078] Specifically, the flower basket 26 is made of plastic, and the loading port 27 is detachably equipped with a plastic cover 34 to avoid metal contamination of silicon material, ensure that the surface gold index of recycled silicon material is not significantly affected, avoid the risk of material downgrading, and meet the photovoltaic industry's demand for high consistency and high purity.

[0079] like Figure 5 and Figure 10 As shown, in a specific embodiment, it also includes an arc-shaped rack 35, which is fixedly connected to the side of the support frame 25. The two ends of the flower basket 26 are gear disks 36, and the tooth surface of the arc-shaped rack 35 matches the tooth surface of the gear disk 36.

[0080] Specifically, if the central shafts 28 at both ends of the flower basket 26 are simply placed inside the semicircular ring 29, the flower basket 26 may rotate. However, in this embodiment, the arc-shaped rack 35 matches the gear disk 36, preventing the flower basket 26 from rotating and making it easier for the loading port 27 of the flower basket 26 to stably correspond to the first unloading port or the second unloading port.

[0081] Specifically, a supporting half-ring and a drive gear are installed in the rinsing tank 31, the ultrasonic rinsing tank 32, and the microwave drying box 33. The supporting half-ring supports the central shaft 28 of the flower basket 26, and the drive gear meshes with the gear disk 36 to drive the flower basket 26 to rotate.

[0082] like Figure 5 and Figure 6 As shown, in a specific embodiment, a counterweight 37 is also included, which is installed at the other end of the chassis 24.

[0083] In this embodiment, specifically, the counterweight 37 and the lifting frame 25 are located at both ends of the chassis 24. When the lifting frame 25 carries the flower basket 26, it makes the two ends of the chassis 24 balanced.

[0084] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A device for recycling polycrystalline silicon water tank bottom material, characterized in that, include: A water tank, comprising a first tank body and a second tank body, wherein the upper port of the second tank body is connected to one side of the bottom wall of the first tank body; The scraping section includes a scraper and two driving mechanisms. The two driving mechanisms are symmetrically arranged on opposite inner sides of the first housing. Each driving mechanism includes a tension rope, a driving roller, two first guide wheels, and two second guide wheels. The two first guide wheels are installed on the top of the first housing, and the two second guide wheels are installed on the lower end of the side wall of the first housing. The scraper is located between the two second guide wheels, and the driving roller is located between the two first guide wheels. The driving roller has a spiral groove on its axial side, and the tension rope is wound in the spiral groove. The end of the tension rope passes over the first guide wheel and the second guide wheel in sequence and is fixedly connected to the surface of the scraper. The picking unit includes a first screening box and a second screening box. The lower end of the first screening box matches the upper opening of the first box body, and the lower end of the second screening box matches the upper opening of the second box body. The bottom wall of the first screening box has a plurality of first sieve holes arranged in a matrix, and the bottom wall of the second screening box has a plurality of second sieve holes arranged in a matrix. The aperture of the second sieve holes is smaller than the aperture of the first sieve holes.

2. The polycrystalline silicon water tank bottom material recycling device according to claim 1, characterized in that, It also includes two first winches, two second winches, and a first baffle. The first winches and second winches are respectively installed above the first housing. One side wall of the first screening box is provided with a first chute. The lifting rope of the first winch is connected to the first chute through a first hook. The lifting ropes of the two second winches are fixedly connected to the opposite side wall of the other end of the first screening box. The other end wall of the first screening box is provided with a first discharge port. The upper side of the first baffle is rotatably connected to the first discharge port. The lower side of the first baffle is equipped with a first magnetic attraction mechanism for controlling the closing of the first discharge port.

3. The polycrystalline silicon water tank bottom material recycling device according to claim 2, characterized in that, It also includes a third winch, a fourth winch, and a second baffle. The third and fourth winches are respectively installed above the first housing. The opposite sidewalls of one end of the second screening box are respectively provided with second chutes. The lifting ropes of the third and fourth winches pass through the first screen holes. The lifting rope of the third winch is connected to the second chutes through a second hook. The lifting rope of the fourth winch is fixedly connected to the opposite sidewall of the other end of the second screening box. The first end of the tension rope passes through the first screen hole and is offset from the second screening box. The other end wall of the second screening box is provided with a second discharge port. The upper side of the second baffle is rotatably connected to the second discharge port. The lower side of the second baffle is equipped with a second magnetic attraction mechanism for controlling the closing of the second discharge port.

4. The polycrystalline silicon water tank bottom material recycling device according to claim 3, characterized in that, The lifting ropes of the third winch, the fourth winch, the second winch, and the tension rope passing through the first screen hole are all in the same plane.

5. The polycrystalline silicon water tank bottom material recycling device according to claim 3, characterized in that, It also includes multiple support rods, which are arranged horizontally in sequence within the first box above the scraper.

6. The polycrystalline silicon water tank bottom material recycling device according to claim 3, characterized in that, The upper port of the second housing has an inclined surface.

7. The polycrystalline silicon water tank bottom material recycling device according to claim 1, characterized in that, The diameter of the first sieve hole is 50 mm, and the diameter of the second sieve hole is 10 mm.

8. The polycrystalline silicon water tank bottom material recycling device according to claim 2 or 3, characterized in that, It also includes a transfer unit, which includes a chassis, a lifting frame and a flower basket. The flower basket has a loading port on its axial side and a central shaft is installed on each of its two ends. The chassis is equipped with wheels. One end of the chassis is fixedly connected to the lower end of the lifting frame, and the upper end of the lifting frame is fixedly connected to two semicircular rings that fit into the central shaft.

9. The polycrystalline silicon water tank bottom material recycling device according to claim 8, characterized in that, It also includes an arc-shaped rack, which is fixedly connected to the side of the support frame. The two ends of the flower basket are gear disks, and the arc-shaped rack matches the gear disks.

10. The polycrystalline silicon water tank bottom material recycling device according to claim 8, characterized in that, It also includes a counterweight, which is installed at the other end of the chassis.

Images