Silicon powder recovery device for polycrystalline silicon production

Abstract

The utility model relates to the technical field of polycrystalline silicon production, and discloses a silicon powder recovery device for polycrystalline silicon production, which comprises a support plate, a sealed spraying part and an automatic dumping part, and support legs are fixedly mounted on the outer wall of the bottom of the support plate. Automatic operation is achieved, the production efficiency is improved, the motor serves as a power source, the rotating rod is driven to rotate through meshing transmission of the driving gear and the driven gear, the rotating shaft rod is combined with the synergistic effect, the overturning action of the silicon powder containing box can be controlled, silicon powder does not need to be manually carried and poured through an automatic pouring mode, and the production efficiency is improved. Due to the fact that the rotating rod and the rotating shaft rod are each provided with a clamping installation groove, a reverse rotation plate and other structures, the silicon powder containing box can be stably installed on the rotating rod and the rotating shaft rod, the control over the overturning angle is achieved under the driving of the motor, and it means that silicon powder can be accurately poured into the hydrolysis box; and the problems of silicon powder scattering, incomplete pouring and the like possibly caused by manual pouring are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of polysilicon production, in particular to a silicon powder recovery device for polysilicon production. Background Art

[0002] In the modern polysilicon production process, silicon powder plays an extremely important role. It is not only the key raw material for starting the polysilicon synthesis reaction, but also exists in large quantities as an intermediate product in some specific production links. The recycling of silicon powder is of great significance to the entire polysilicon production system. The recycling efficiency and quality of silicon powder are directly related to many core aspects of polysilicon production, such as cost control, resource utilization and quality improvement of the final product.

[0003] Traditional silicon powder recycling methods often have many disadvantages. The sealing of traditional recycling devices is poor, and silicon powder leakage is prone to occur during the recycling process. Silicon powder leakage will not only pollute the production environment and pose a threat to the health of operators, but also may affect the normal operation of other production equipment and reduce the stability and reliability of the entire production system. The hydrolysis site is not closed, which pollutes the surrounding people and the environment, increases the workload of operators, and the silicon powder recovery efficiency is not high. Utility Model Content

[0004] The purpose of the utility model is to provide a silicon powder recovery device for polysilicon production to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a silicon powder recovery device for polysilicon production, comprising a support plate, a sealed spray watering part, and an automatic dumping part, wherein the bottom outer wall of the support plate is fixedly installed with a support leg, and the bottom outer wall of the support leg is fixedly installed with a support pad; the sealed spray watering part is arranged on the top of the support plate; and the automatic dumping part is arranged inside the sealed spray watering part.

[0006] Preferably, the sealed spray watering part specifically includes: a hydrolysis box, fixedly installed on the top outer wall of the support plate; a sealing box, fixedly installed on the top outer wall of the hydrolysis box; a water storage tank, fixedly installed on the top of the sealing box; and a switch valve pipe, arranged on the bottom outer wall of the support plate.

[0007] A water storage tank is set up, and through the coordinated cooperation with a series of components such as the sealing box, hydrolysis box, switch valve pipe, water pipe, connecting block and sprinkler head, the water storage tank can realize the precise spraying treatment of silicon powder. When spraying is needed, the silicon powder placement area in the sealing box is evenly sprayed by the sprinkler head after passing through the water pipe and connecting block. This precise spraying control is not only conducive to improving the contact effect between silicon powder and water, but also promoting the hydrolysis reaction of silicon powder or other related recycling and treatment processes, further optimizing the overall performance of the recycling device, improving the efficiency and effect of silicon powder recovery, reducing production costs and improving production benefits.

[0008] Preferably, a threaded sealing cover is provided on the top of the water tank, hinges are equidistantly provided on the outer wall of the sealed box, a sealed box door is fixedly connected to the outer wall of the sealed box via the hinges, an observation window is provided on the outer wall of the sealed box door, and a handle is fixedly installed on the outer wall of the sealed box door.

[0009] Preferably, one end of the switch valve tube movably passes through the bottom outer wall of the support plate and extends to the top outer wall of the support plate, one end of the switch valve tube is connected to the hydrolysis box, the bottom outer wall of the water storage tank is connected with a water pipe, the other end of the water pipe movably passes through the top outer wall of the sealed box and extends to the interior of the sealed box, the other end of the water pipe is connected with a connecting block, and the bottom outer wall of the connecting block is circumferentially equidistantly connected with spray heads.

[0010] Preferably, connecting rods are fixedly installed on the top outer wall of the connecting block at equal intervals around the circumference, and the other end of the connecting rods is fixedly connected to the top of the inner wall of the sealing box. A rectangular opening is provided on the top of the hydrolysis box, and a grille mesh is fixedly installed on the inner wall of the rectangular opening. The hydrolysis box is connected to the sealing box through the rectangular opening, and a partition is fixedly installed on the top of the inner wall of the hydrolysis box. A connecting groove is provided inside the partition, and a sliding partition is slidably connected inside the connecting groove. A suspension plate is fixedly installed on the bottom outer wall of the sliding partition, and a suspension ball is fixedly connected to the bottom outer wall of the suspension plate.

[0011] A sliding baffle is provided, and the setting of the suspension plate and the suspension ball provides a dynamic adjustment mechanism for the sliding baffle. When the water level in the hydrolysis box rises or the substances produced by the silicon powder reaction change the solution density, the suspension ball will drive the suspension plate and the sliding baffle to move accordingly. If the solution density is small at the beginning of the reaction, the position of the suspension ball is low, and the sliding baffle is in a relatively high position, thereby limiting the contact between the silicon powder and water. As the reaction proceeds, the solution density increases due to factors such as the dissolution of silicon powder, and the suspension ball floats up, driving the sliding baffle to move downward, gradually increasing the contact area between the silicon powder and water, thereby realizing automatic adaptive adjustment of the reaction process without frequent manual intervention, thereby improving the intelligence and automation level of the device operation, and reducing the difficulty of operation and labor costs.

[0012] Preferably, the automatic dumping part specifically comprises: a motor fixing frame fixedly mounted on the outer wall of the sealing box; a rotating shaft rotatably connected to the inner wall of the sealing box; and a motor is fixedly mounted inside the motor fixing frame.

[0013] Preferably, the output end of the motor is fixedly connected to a driving gear, and the driving gear is rotatably installed on the outer wall of the sealing box through an axis, the driving gear is meshingly connected to a driven gear, and the outer wall of the driven gear is fixedly connected to a rotating rod, and the other end of the rotating rod movably penetrates the outer wall of the sealing box and extends to the interior of the sealing box.

[0014] A motor is provided as a power source, and its output end is connected to a driving gear, which meshes with a driven gear to drive the rotating rod to rotate, and cooperates with the rotating shaft rod to flip the silicon powder placement box installed on the reversing plate in the snap-fit ​​installation groove. After the silicon powder reaction is completed, the motor can accurately control the flipping angle and speed of the silicon powder placement box to ensure that the silicon powder can be completely and smoothly poured into the hydrolysis box, avoiding silicon powder residue and improving the efficiency and thoroughness of silicon powder recovery.

[0015] Preferably, the rotating rod and the rotating shaft rod are both provided with a snap-fitting installation groove, the inner wall of the snap-fitting installation groove is fixedly installed with a reversal plate, the top of the reversal plate is provided with a rectangular installation slot, the interior of the rectangular installation slot is snap-fitted with a silicon powder placement box, the outer walls of both sides of the silicon powder placement box are fixedly installed with fixed ear plates, the fixed ear plates are both provided with through slots, the top of the reversal plate is rotatably connected to a rotating rod, the outer wall of the rotating rod is fixedly sleeved with a card plate, the card plate is adapted to the through slot, and the top of the rotating rod is fixedly connected to a rotating block.

[0016] The utility model provides a silicon powder recovery device for polysilicon production, which has the following beneficial effects:

[0017] (1) The utility model effectively realizes the hydrolysis reaction of silicon powder. The hydrolysis box serves as the core reaction area. Through the cooperation of the water pipe at the bottom, the connecting block and the spray head, the water in the water storage tank can be evenly sprayed on the silicon powder. The necessary reaction medium is provided for the reaction between silicon powder and water in the hydrolysis box, ensuring that the silicon powder can fully contact with water to undergo a hydrolysis reaction, thereby allowing the silicon powder to be recycled. Good sealing performance ensures the reaction environment and safety. The sealing box seals the hydrolysis box and related spraying components. The water storage tank on the top also has a threaded sealing cover. This sealing design effectively prevents the escape of harmful gases that may be generated during the reaction, avoids pollution to the surrounding environment, and also ensures the personal safety of the operator.

[0018] (2) The utility model improves production efficiency by realizing automated operation. The motor serves as a power source. Through the meshing transmission of the driving gear and the driven gear, it drives the rotating rod to rotate. Combined with the synergistic effect of the rotating shaft, it can control the flipping action of the silicon powder placement box. The automated dumping method does not require manual handling and dumping of silicon powder, saving labor costs and time costs. Since the rotating rod and the rotating shaft are provided with a snap-fit ​​mounting groove and a reversing plate and other structures, the silicon powder placement box can be stably installed on them and the flipping angle can be controlled under the drive of the motor, which means that the silicon powder can be accurately poured into the hydrolysis box, avoiding the problems of silicon powder spilling and incomplete dumping that may occur during manual dumping. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of the overall structure of the utility model;

[0020] Figure 2 This is a partial view of the sealed spray sprinkler of the utility model;

[0021] Figure 3 This is a partial view of the grille mesh plate of the utility model;

[0022] Figure 4 It is a partial view of the automatic dumping part of the utility model.

[0023] In the figure: 1 support plate, 2 support leg, 3 sealed spray water sprinkling part, 311 water storage tank, 312 threaded sealing cover, 313 sealed box, 314 sealed box door, 315 handle, 316 hydrolysis box, 317 switch valve pipe, 318 grille mesh plate, 319 water pipe, 3111 connecting rod, 3112 connecting block, 3113 spray head, 3114 partition, 3115 sliding partition, 3116 suspension ball, 3117 suspension plate, 4 automatic dumping part, 411 motor fixing frame, 412 motor, 413 driving gear, 414 driven gear, 415 rotating rod, 416 engaging mounting groove, 417 rotating shaft rod, 418 reversing plate, 419 fixed ear plate, 4111 rotating rod, 4112 card plate, 4113 silicon powder placement box. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0026] Embodiment 1:

[0027] The preferred embodiment of the silicon powder recovery device for polysilicon production provided by the utility model is as follows Figure 1-4 As shown: A silicon powder recovery device for polysilicon production, including a support plate 1, a sealed spray watering part 3, and an automatic dumping part 4, the bottom outer wall of the support plate 1 is fixedly installed with a support leg 2, and the bottom outer wall of the support leg 2 is fixedly installed with a support pad; the sealed spray watering part 3 is arranged on the top of the support plate 1; the automatic dumping part 4 is arranged inside the sealed spray watering part 3.

[0028] The sealed spray watering part 3 specifically includes: a hydrolysis box 316, fixedly installed on the top outer wall of the support plate 1; a sealing box 313, fixedly installed on the top outer wall of the hydrolysis box 316; a water storage tank 311, fixedly installed on the top of the sealing box 313; and a switch valve pipe 317, arranged on the bottom outer wall of the support plate 1.

[0029] A threaded sealing cover 312 is provided on the top of the water storage tank 311, hinges are equidistantly provided on the outer wall of the sealed box 313, a sealed box door 314 is fixedly connected to the outer wall of the sealed box 313 via hinges, an observation window is provided on the outer wall of the sealed box door 314, and a handle 315 is fixedly installed on the outer wall of the sealed box door 314.

[0030] One end of the switch valve tube 317 movably passes through the bottom outer wall of the support plate 1 and extends to the top outer wall of the support plate 1. One end of the switch valve tube 317 is connected to the hydrolysis box 316. The bottom outer wall of the water storage tank 311 is connected to a water pipe 319. The other end of the water pipe 319 movably passes through the top outer wall of the sealed box 313 and extends to the interior of the sealed box 313. The other end of the water pipe 319 is connected to a connecting block 3112. The bottom outer wall of the connecting block 3112 is equidistantly connected to a spray head 3113.

[0031] The top outer wall of the connecting block 3112 is fixedly installed with connecting rods 3111 at equidistant intervals around the circumference, and the other end of the connecting rods 3111 is fixedly connected to the top of the inner wall of the sealed box 313. A rectangular opening is provided at the top of the hydrolysis box 316, and a grille mesh 318 is fixedly installed on the inner wall of the rectangular opening. The hydrolysis box 316 is connected to the sealed box 313 through the rectangular opening, and a partition 3114 is fixedly installed on the top of the inner wall of the hydrolysis box 316. A connecting groove is provided inside the partition 3114, and a sliding partition 3115 is slidably connected inside the connecting groove. A suspension plate 3117 is fixedly installed on the bottom outer wall of the sliding partition 3115, and a suspension ball 3116 is fixedly connected to the bottom outer wall of the suspension plate 3117.

[0032] In the process of this embodiment, silicon powder is poured onto the grid mesh plate 318 through the rectangular opening at the top of the hydrolysis box 316. Under the action of gravity or pressure, the water in the water storage tank 311 passes through the water pipe 319, the connecting block 3112, and finally sprays out from the spray head 3113 to spray the silicon powder on the grid mesh plate 318. As the spraying proceeds, the water level in the hydrolysis box 316 gradually rises. When the water level rises to a certain height, the buoyancy of the water will cause the suspension plate 3117 and the suspension ball 3116 at the bottom to rise, thereby driving the sliding partition 3115 to slide upward in the connecting chute of the partition 3114, controlling the water level in the hydrolysis box 316, ensuring that the spraying and hydrolysis reactions are carried out under appropriate water level conditions, gradually increasing the contact area between the silicon powder and the water, and realizing the automatic adaptive adjustment of the reaction process without frequent manual intervention, thereby improving the intelligence and automation level of the device operation, and reducing the difficulty of operation and labor costs.

[0033] Embodiment 2:

[0034] On the basis of the first embodiment, a preferred embodiment of a silicon powder recovery device for polysilicon production provided by the present invention is as follows: Figure 1-4 As shown, the automatic dumping part 4 specifically includes: a motor fixing frame 411, which is fixedly installed on the outer wall of the sealing box 313; a rotating shaft 417, which is rotatably connected to the inner wall of the sealing box 313; and a motor 412 is fixedly installed inside the motor fixing frame 411.

[0035] The output end of the motor 412 is fixedly connected to a driving gear 413, which is rotatably installed on the outer wall of the sealed box 313 through an axis. The driving gear 413 is meshingly connected to a driven gear 414, and the outer wall of the driven gear 414 is fixedly connected to a rotating rod 415, and the other end of the rotating rod 415 movably penetrates the outer wall of the sealed box 313 and extends to the interior of the sealed box 313.

[0036] Both the rotating rod 415 and the rotating shaft rod 417 are provided with a snap-fitting installation groove 416, the inner wall of the snap-fitting installation groove 416 is fixedly installed with a reversing plate 418, the top of the reversing plate 418 is provided with a rectangular installation slot, the inside of the rectangular installation slot is snap-fitted with a silicon powder placement box 4113, the outer walls of both sides of the silicon powder placement box 4113 are fixedly installed with fixed ear plates 419, the fixed ear plates 419 are provided with through slots, the top of the reversing plate 418 is rotatably connected to a rotating rod 4111, the outer wall of the rotating rod 4111 is fixedly sleeved with a card plate 4112, the card plate 4112 is adapted to the through slot, and the top of the rotating rod 4111 is fixedly connected to a rotating block.

[0037] In the process of this embodiment, the motor 412 is started, and the output end of the motor 412 drives the driving gear 413 to rotate. The driving gear 413 is meshed with the driven gear 414, thereby driving the rotating rod 415 on the driven gear 414 to rotate. The rotating rod 415 cooperates with the rotating shaft 417 that is rotatably connected to the inner wall of the sealing box 313, so that the silicon powder placement box 4113 installed on the reversing plate 418 in the snap-fit ​​installation groove 416 begins to flip. After the silicon powder placement box 4113 flips, the silicon powder is poured onto the grid mesh plate 318 through the rectangular opening at the top of the hydrolysis box 316, which can control the flipping action of the silicon powder placement box. The automated dumping method does not require manual handling and dumping of silicon powder, saving labor costs and time costs.

[0038] Working principle: When in use:

[0039] Step 1: First, place the silicon powder in the silicon powder placement box 4113 of the automatic dumping part 4, align the fixed ear plates 419 on both sides of the silicon powder placement box 4113 with the rectangular installation slots on the top of the reversing plate 418 to make them snap-fit ​​and install, then rotate the rotating block to drive the rotating rod 4111 to rotate, so that the card plate 4112 rotates and snaps with the top outer wall of the fixed ear plate 419, and the silicon powder placement box 4113 is fixed and installed;

[0040] Step 2: Start the motor 412, and the output end of the motor 412 drives the driving gear 413 to rotate. The driving gear 413 is meshed with the driven gear 414, thereby driving the rotating rod 415 on the driven gear 414 to rotate. The rotating rod 415 cooperates with the rotating shaft rod 417 rotatably connected to the inner wall of the sealing box 313 to make the silicon powder placing box 4113 installed on the reversing plate 418 in the snap-fitting installation groove 416 start to flip. After the silicon powder placing box 4113 flips, the silicon powder is poured onto the grid mesh plate 318 through the rectangular opening at the top of the hydrolysis box 316. Under the action of gravity or pressure, the water in the water storage tank 311 passes through the water pipe 319, the connecting block 3112, and finally sprays out from the spray head 3113 to spray the silicon powder on the grid mesh plate 318. As the spraying proceeds, the water level in the hydrolysis box 316 gradually rises. When the water level rises to a certain height, the buoyancy of the water will cause the suspension plate 3117 and the suspension ball 3116 at the bottom to rise, thereby driving the sliding partition 3115 to slide upward in the connecting slide groove of the partition 3114, controlling the water level in the hydrolysis box 316, and ensuring that the spraying and hydrolysis reactions are carried out under appropriate water level conditions;

[0041] Step 3: After the spraying and hydrolysis reactions are completed, stop spraying, use the observation window to check the internal situation, and perform inspection, cleaning or maintenance on the inside of the device. During the entire working process, the relevant structural design of the sealing box 313 and the sealed spray sprinkler 3 can effectively prevent the leakage of substances such as silicon powder and water, ensure the cleanliness and safety of the working environment, and improve the efficiency and quality of silicon powder recovery.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A silicon powder recovery device for polysilicon production, comprising a support plate (1), a sealed spraying and watering part (3), and an automatic dumping part (4), characterized in that: A support leg (2) is fixedly mounted on the bottom outer wall of the support plate (1), and a support pad is fixedly mounted on the bottom outer wall of the support leg (2); the sealed spraying and watering portion (3) is arranged on the top of the support plate (1); and the automatic dumping portion (4) is arranged inside the sealed spraying and watering portion (3).

2. A silicon powder recovery device for polysilicon production according to claim 1, characterized in that: The sealed spraying watering part (3) specifically comprises: A hydrolysis box (316) fixedly mounted on the top outer wall of the support plate (1); A sealing box (313) is fixedly mounted on the top outer wall of the hydrolysis box (316); A water storage tank (311) is fixedly mounted on the top of the sealing box (313); The switch valve tube (317) is arranged on the bottom outer wall of the support plate (1).

3. A silicon powder recovery device for polysilicon production according to claim 2, characterized in that: A threaded sealing cover (312) is provided on the top of the water storage tank (311), hinges are equidistantly provided on the outer wall of the sealed box (313), a sealed box door (314) is fixedly connected to the outer wall of the sealed box (313) via the hinge, an observation window is provided on the outer wall of the sealed box door (314), and a handle (315) is fixedly mounted on the outer wall of the sealed box door (314).

4. The silicon powder recovery device for polysilicon production according to claim 3, characterized in that: One end of the switch valve tube (317) movably penetrates the outer wall of the bottom wall of the support plate (1) and extends to the outer wall of the top of the support plate (1); one end of the switch valve tube (317) is connected to the hydrolysis box (316); a water pipe (319) is provided on the outer wall of the bottom of the water storage tank (311); the other end of the water pipe (319) movably penetrates the outer wall of the top of the sealed box (313) and extends to the inside of the sealed box (313); the other end of the water pipe (319) is provided on the outer wall of the bottom of the sealed box (313); and a spray head (3113) is provided on the outer wall of the bottom of the sealed box (3112) at equal intervals.

5. The silicon powder recovery device for polysilicon production according to claim 4, characterized in that: Connecting rods (3111) are fixedly installed at equal intervals on the circumference of the top outer wall of the connecting block (3112); the other end of the connecting rods (3111) is fixedly connected to the top of the inner wall of the sealing box (313); a rectangular opening is provided on the top of the hydrolysis box (316); a grille mesh plate (318) is fixedly installed on the inner wall of the rectangular opening; the hydrolysis box (316) is connected to the sealing box (313) via the rectangular opening; a partition plate (3114) is fixedly installed on the top of the inner wall of the hydrolysis box (316); a connecting groove is provided inside the partition plate (3114); a sliding partition plate (3115) is slidably connected inside the connecting groove; a suspension plate (3117) is fixedly installed on the bottom outer wall of the sliding partition plate (3115); and a suspension ball (3116) is fixedly connected to the bottom outer wall of the suspension plate (3117).

6. The silicon powder recovery device for polysilicon production according to claim 1, characterized in that: The automatic dumping unit (4) specifically comprises: A motor fixing frame (411) is fixedly mounted on the outer wall of the sealing box (313); Rotating the shaft (417) to be rotatably connected to the inner wall of the sealing box (313); A motor (412) is fixedly mounted inside the motor fixing frame (411).

7. The silicon powder recovery device for polysilicon production according to claim 6, characterized in that: The output end of the motor (412) is fixedly connected to a driving gear (413), the driving gear (413) is rotatably mounted on the outer wall of the sealing box (313) via an axis, the driving gear (413) is meshingly connected to a driven gear (414), the outer wall of the driven gear (414) is fixedly connected to a rotating rod (415), and the other end of the rotating rod (415) movably penetrates the outer wall of the sealing box (313) and extends into the interior of the sealing box (313).

8. The silicon powder recovery device for polysilicon production according to claim 7, characterized in that: The rotating rod (415) and the rotating shaft rod (417) are both provided with a snap-fitting installation groove (416), a reversing plate (418) is fixedly installed on the inner wall of the snap-fitting installation groove (416), a rectangular installation slot is provided on the top of the reversing plate (418), a silicon powder placement box (4113) is snap-fitted and installed inside the rectangular installation slot, fixed ear plates (419) are fixedly installed on the outer walls of both sides of the silicon powder placement box (4113), through slots are provided on the fixed ear plates (419), a rotating rod (4111) is rotatably connected to the top of the reversing plate (418), a card plate (4112) is fixedly sleeved on the outer wall of the rotating rod (4111), the card plate (4112) is adapted to the through slot, and a rotating block is fixedly connected to the top of the rotating rod (4111).

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