Floor silicon powder recovery equipment
By designing a floor-mounted silicon powder recycling device, and utilizing filter sieving and tank shaking technology, the problem of silicon powder waste in polysilicon production has been solved, achieving efficient silicon powder recycling and cost reduction.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINJIANG DAQO NEW ENERGY CO LTD
- Filing Date
- 2025-04-24
- Publication Date
- 2026-04-21
AI Technical Summary
During the polysilicon production process, silicon powder is often spilled due to damage to the ton bags, resulting in waste and increased production costs.
Design a floor-mounted silicon powder recycling device, including a support frame, a tank, a filter component, and a receiving component. The device recovers silicon powder by screening through filter holes and uses a spring to shake the tank to keep the filter holes unobstructed and prevent impurities from clogging them.
Effectively recover scattered silicon powder, reduce silicon powder waste, lower production costs, and improve silicon powder utilization.
Smart Images
Figure CN224142782U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of polysilicon production technology, and in particular to a ground-mounted silicon powder recycling device. Background Technology
[0002] Currently, the production process for polycrystalline silicon still mainly relies on the modified Siemens process. In a fluidized bed, metallurgical-grade silicon is converted into crude trichlorosilane (TCS) through a hydrogenation reaction. After multi-stage distillation purification, it is vaporized and fed into a CVD reduction furnace. There, it undergoes a vapor-phase deposition reaction with hydrogen on the surface of an electrically heated silicon core (approximately 1200°C), and is reduced to elemental silicon. The silicon core gradually grows into a polycrystalline silicon rod.
[0003] Currently, in the polysilicon production process, industrial silicon is added to the cold hydrogenated fluidized bed system via intermittent manual hoisting using ton bags. During the silicon powder transfer, hoisting, storage, and addition processes, it is unavoidable that the ton bags break, causing silicon powder to spill onto the ground. After cleaning, a large amount of particulate matter is carried into the spilled silicon powder, rendering this portion unusable and requiring disposal as waste dust. This results in a waste of industrial silicon, leading to high silicon consumption and increased production costs. Utility Model Content
[0004] In view of this, this utility model embodiment provides a ground-mounted silicon powder recycling device, the main purpose of which is to screen and recycle silicon powder scattered on the ground.
[0005] To achieve the above objectives, this utility model mainly provides the following technical solutions:
[0006] This utility model embodiment provides a floor-mounted silicon powder recycling device, which includes: a support frame, a tank, a filter component, and a receiving component;
[0007] The upper end of the bracket is provided with a support ring platform;
[0008] The upper periphery of the tank is fixedly connected to the inner edge of the bearing ring platform, the bearing ring platform overlaps the support ring platform, the diameter of the tank is smaller than the inner diameter of the support ring platform, the outer edge of the bearing ring platform is connected to the outer edge of the support ring platform by multiple springs, and the lower end of the tank is provided with a leakage port.
[0009] The filter element is disposed inside the tank, and the diameter of the filter pores of the filter element is larger than the particle diameter of the silicon powder and smaller than the particle diameter of the impurities.
[0010] The receiving component is located below the tank.
[0011] The purpose of this utility model and the technical problems to be solved can be further achieved by the following technical measures.
[0012] Optionally, it also includes multiple balls, and the lower surface of the support ring platform is evenly distributed with multiple grooves in a ring. Two-thirds of the solid part of each ball is rolled and embedded in one of the grooves, and the part of the ball outside the groove contacts the upper surface of the support ring platform.
[0013] Optionally, the filter component includes an outer frustum wall, an annular bottom wall, and an inner conical wall connected in sequence.
[0014] Optionally, it also includes a support ring plate, which is fixedly connected to the inner wall of the tank, and the upper outer edge of the outer truncated cone wall overlaps the support ring plate.
[0015] Optionally, it also includes a handle component, which is fixedly connected to the upper end of the outer truncated cone wall.
[0016] Optionally, it also includes multiple upright plates, the lower ends of which are fixedly connected to the outer edge of the support ring platform, and one end of each spring is fixedly connected to the outer edge of the bearing ring platform, and the other end is fixedly connected to the upright plate.
[0017] Optionally, the receiving component is a ton bag, and the opening of the ton bag corresponds to the discharge port.
[0018] Optionally, the bracket also includes wheels, which are located at the lower end of the bracket and are equipped with brakes.
[0019] By employing the above technical solution, this utility model has at least the following advantages:
[0020] Before using this equipment, the collected silicon powder is manually added from the top port of the tank. The silicon powder passes through the filter holes of the filter component to the discharge port and enters the receiving component. Impurities are intercepted by the filter component.
[0021] During the above process, the tank is pushed horizontally and intermittently, causing multiple springs to reciprocate and extend, thereby causing the tank to shake continuously. This maintains the relative movement between impurities and the surface of the filter components, thus preventing impurities from clogging the filter pores, keeping the filter pores unobstructed, and ensuring the efficiency of silicon powder passing through the filter components. Attached Figure Description
[0022] Figure 1 A diagram of a floor-mounted silicon powder recycling device provided for an embodiment of this utility model;
[0023] Figure 2 for Figure 1 Enlarged view of section A.
[0024] The reference numerals in the accompanying drawings include: bracket 1, tank body 2, support ring platform 3, load-bearing ring platform 4, spring 5, material outlet 6, material receiving component 7, filter component 8, ball bearing 9, first annular steel plate 10, second annular steel plate 11, outer truncated cone wall 801, annular bottom wall 802, inner conical wall 803, support ring plate 12, handle component 13, upright plate 14, and traveling wheel 15. Detailed Implementation
[0025] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are 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.
[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0027] like Figure 1 As shown, an embodiment of this utility model provides a floor-mounted silicon powder recycling device, which includes: a support 1, a tank 2, a filter component 8, and a receiving component 7;
[0028] The upper end of the bracket 1 is provided with a support ring platform 3;
[0029] The upper circumference of the tank body 2 is fixedly connected to the inner edge of the bearing ring platform 4. The bearing ring platform 4 overlaps the support ring platform 3. The diameter of the tank body 2 is smaller than the inner diameter of the support ring platform 3. The outer edge of the bearing ring platform 4 is connected to the outer edge of the support ring platform 3 through multiple springs 5. The lower end of the tank body 2 is provided with a leakage port 6.
[0030] The filter element 8 is installed inside the tank 2. The diameter of the filter pores of the filter element 8 is larger than the particle diameter of the silicon powder and smaller than the particle diameter of the impurities.
[0031] The receiving component 7 is located below the tank body 2.
[0032] The working process of the ground-mounted silicon powder recycling equipment is as follows:
[0033] Before using this equipment, the collected silicon powder is manually added from the upper port of the tank 2. The silicon powder passes through the filter holes of the filter component 8 to the discharge port 6 and enters the receiving component 7. Impurities are intercepted by the filter component 8.
[0034] During the above process, the tank 2 is pushed horizontally and intermittently by human, which causes multiple springs 5 to reciprocate and extend, thereby causing the tank 2 to shake continuously, maintaining the relative movement between the impurities and the surface of the filter component 8. This prevents impurities from clogging the filter holes of the filter component 8, keeps the filter holes of the filter component 8 unobstructed, and ensures the efficiency of silicon powder passing through the filter component 8.
[0035] Specifically, the upper circumference of the tank body 2 is welded to the inner edge of the bearing ring platform 4. During the shaking of the tank body 2, the bearing ring platform 4 overlaps with the support ring platform 3. The bearing ring platform 4 moves horizontally back and forth relative to the support ring platform 3. The support ring platform 3 indirectly supports the weight of the tank body 2 and prevents the tank body 2 from falling.
[0036] Specifically, the diameter of the tank 2 is smaller than the inner diameter of the support ring platform 3, and there is a gap between the tank 2 and the support ring platform 3, which provides room for the horizontal swaying of the tank 2.
[0037] like Figure 2 As shown, in a specific embodiment, it also includes multiple balls 9. The lower surface of the bearing ring 4 is evenly distributed with multiple grooves in a ring. Two-thirds of the solid part of each ball 9 is rolled and embedded in one of the grooves, and the part of the ball 9 outside the groove contacts the upper surface of the bearing ring 3.
[0038] In this embodiment, the specific processing and installation process of the ball bearing 9 and the groove structure is as follows:
[0039] First, process and manufacture the first annular steel plate 10 and the second annular steel plate 11. The lower surface of the first annular steel plate 10 is evenly distributed with multiple pits, and the second annular plate is evenly distributed with multiple round holes. The multiple pits and multiple round holes correspond one-to-one. When the first annular steel plate 10 and the second annular steel plate 11 are joined together, each pit and one of the round holes form a groove structure.
[0040] First, place the ball bearing 9 into the round hole, with one-third of the solid part of the ball bearing 9 located below the second annular steel plate 11. Then, align the lower surface of the first annular steel plate 10 with the upper surface of the second annular steel plate 11. Next, weld the gap between the edges of the first annular steel plate 10 and the second annular steel plate 11, so that two-thirds of the solid part of the ball bearing 9 is located in the groove formed by the recess and the round hole. Then, weld and fix the upper surface of the first annular steel plate 10 to the lower surface of the bearing ring platform 4, with one-third of the solid part of the ball bearing 9 protruding from the lower surface of the second annular steel plate 11.
[0041] Through the above processing, during the horizontal shaking of the tank 2, the bearing ring platform 4 moves horizontally back and forth relative to the support ring platform 3, while the ball bearing 9 and the upper surface of the support ring platform 3 roll into contact, resulting in a small coefficient of friction. This avoids the rapid loss of kinetic energy during the horizontal movement of the tank 2, making it easier for the operator to manually push the tank 2 once, allowing the tank 2 to shake back and forth for a relatively long time.
[0042] In a specific embodiment, the filter component 8 includes an outer frustum wall 801, an annular bottom wall 802, and an inner conical wall 803 connected in sequence.
[0043] In this embodiment, specifically, when the silicon powder to be filtered is poured into the tank 2, it slides down along the outer frustum wall 801 and the inner conical wall 803, and finally collects on the annular bottom wall 802. During the above process, the silicon powder passes through the filter holes of the filter component 8, and the annular bottom wall 802 provides a bearing surface for the uniform dispersion of the silicon powder, which greatly avoids silicon powder bridging and accumulation.
[0044] Specifically, the outer frustum wall 801, the inner conical wall 803, and the annular bottom wall 802 are each provided with multiple filter holes.
[0045] Specifically, the filter pore diameter is 4mm, and the fineness of the silicon powder is 5 mesh to 400 mesh; the impurities are mainly bolts and iron wires, and the smallest cross-sectional diameter of the impurities is greater than 4mm.
[0046] In a specific embodiment, a support ring plate 12 is also included. The support ring plate 12 is fixedly connected to the inner side wall of the tank body 2, and the upper outer edge of the outer truncated cone wall 801 overlaps with the support ring plate 12.
[0047] In this embodiment, specifically, the upper outer edge of the outer truncated cone wall 801 overlaps with the support ring plate 12, ensuring the positional stability of the filter component 8 relative to the tank 2 during the filtration of silicon powder, and preventing the filter component 8 from falling downwards.
[0048] In a specific embodiment, a handle component 13 is also included, which is fixedly connected to the upper end of the outer truncated cone wall 801.
[0049] Once a batch of silicon powder has been filtered, the operator can hold the handle 13 and remove the filter element 8 from the tank 2.
[0050] In a specific embodiment, it also includes multiple upright plates 14, the lower ends of which are fixedly connected to the outer edge of the support ring platform 3, and one end of each spring 5 is fixedly connected to the outer edge of the bearing ring platform 4, and the other end is fixedly connected to the upright plate 14.
[0051] In this embodiment, specifically, the lower end of the upright plate 14 is fixedly connected to the outer edge of the support ring platform 3, the bearing ring platform 4 overlaps the upper surface of the support ring platform 3, and the spring 5 is connected to the outer edge of the bearing ring platform 4 and the upright plate 14 respectively, so that the spring 5 extends horizontally. When the tank 2 shakes back and forth, the spring 5 extends and retracts horizontally, avoiding bending of the spring 5 relative to its axial direction, thereby extending the service life of the spring 5.
[0052] In a specific implementation, the receiving component 7 is a ton bag, and the opening of the ton bag corresponds to the material discharge port 6.
[0053] In this embodiment, specifically, the four corner straps of the ton bag are hooked to the bracket 1 to facilitate the support of the three-dimensional shape of the ton bag. The filtered silicon powder in the tank 2 enters the ton bag from the leakage port 6 to facilitate the collection of the filtered silicon powder.
[0054] In a specific embodiment, it also includes a traveling wheel 15, which is disposed at the lower end of the bracket 1 and is equipped with a brake.
[0055] In this embodiment, specifically, the operator can move the support 1 using the wheels 15 to move the equipment to the required location, thereby improving the efficiency of equipment use; and the wheels 15 are equipped with brakes, which improves the stability of the support 1 and makes it easier for the operator to pour the silica powder to be filtered into the tank 2.
[0056] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model 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 this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.
Claims
1. A floor silicon powder recovery apparatus, characterized by, include: A bracket, the upper end of which is provided with a support ring platform; The tank body has its upper circumference fixedly connected to the inner edge of the bearing ring platform, the bearing ring platform overlapping the support ring platform, the diameter of the tank body being smaller than the inner diameter of the support ring platform, the outer edge of the bearing ring platform being connected to the outer edge of the support ring platform by multiple springs, and the lower end of the tank body having a material leakage port. A filter element is disposed inside the tank, wherein the diameter of the filter pores of the filter element is larger than the particle diameter of the silicon powder and smaller than the particle diameter of the impurities. A receiving component is provided below the tank body.
2. The ground-mounted silicon powder recycling equipment according to claim 1, characterized in that, It also includes multiple balls, and the lower surface of the supporting ring platform is evenly distributed with multiple grooves in a ring. Two-thirds of the solid part of each ball is rolled and embedded in one of the grooves, and the part of the ball outside the groove contacts the upper surface of the supporting ring platform.
3. The ground-mounted silicon powder recycling equipment according to claim 1, characterized in that, The filter component includes an outer frustum wall, an annular bottom wall, and an inner conical wall connected in sequence.
4. The ground-mounted silicon powder recycling equipment according to claim 3, characterized in that, It also includes a support ring plate, which is fixedly connected to the inner wall of the tank, and the upper outer edge of the outer truncated cone wall overlaps the support ring plate.
5. The ground-mounted silicon powder recycling equipment according to claim 4, characterized in that, It also includes a handle component, which is fixedly connected to the upper end of the outer truncated cone wall.
6. The ground-mounted silicon powder recycling equipment according to claim 1, characterized in that, It also includes multiple upright plates, the lower ends of which are fixedly connected to the outer edge of the support ring platform, and one end of each spring is fixedly connected to the outer edge of the bearing ring platform, and the other end is fixedly connected to the upright plate.
7. The ground-mounted silicon powder recycling equipment according to any one of claims 1 to 6, characterized in that, The receiving component uses a ton bag, and the opening of the ton bag corresponds to the discharge port.
8. The ground-mounted silicon powder recycling equipment according to any one of claims 1 to 6, characterized in that, It also includes a traveling wheel, which is located at the lower end of the bracket and is equipped with a brake.