Separation device for separating silicon material

Abstract

The utility model relates to separating device technical field especially is separated the separating device for separating silicon material, include: several parts such as separating main body, import passage, export passage and reflector, in the utility model, through adopting the air inlet passage of downward inclination makes airflow produce high -speed rotation, slow down wind speed simultaneously using the outer expansion first cone body section of immediate succession under straight cylinder section to separate silicon material particle. The silicon material particle separated out falls into the second cone body section through the gap between reflector and first cone body section, finally reaches the collection frame and collects, effectively improved the recovery rate. The gas of silicon material particle separation is sent to the next procedure by export passage, and then the problem that the hard silicon material particle is carried by high -speed airflow and causes violent erosion wear, leads to pipeline frequent wear and tear, equipment life sharp reduction in prior art is solved.

Description

Technical Field

[0001] This utility model relates to the field of separation device technology, and in particular to a separation device for separating silicon material. Background Technology

[0002] In the field of polysilicon production, high-purity silicon material is the foundation for manufacturing high-quality silicon wafers. After undergoing processing steps such as crushing and screening, silicon material inevitably accumulates metallic impurities (such as iron and nickel) and micro-dust on its surface and inside. These impurities, especially micron-sized particles, will severely degrade the electrical and mechanical properties of the subsequent silicon wafers, making it difficult to meet the stringent purity requirements of the current high-end market.

[0003] Currently, the industry, especially in the post-crushing and screening process of silicon material, commonly employs a combination of "strong magnetic adsorption" and "negative pressure ventilation." Strong magnetic adsorption relies on a high-gradient magnetic separator (HGMS) to generate a strong magnetic field, which adsorbs and removes magnetic metal impurities such as iron and nickel. Negative pressure ventilation utilizes negative pressure airflow to adsorb fine dust from the surface of the silicon material, aiming to reduce powder residue at the bottom of the bag.

[0004] However, during negative pressure ventilation, the high-speed airflow carries away a large amount of qualified fine silicon particles, which cannot be effectively recovered. This not only directly reduces the product recovery rate but also causes significant economic losses. On the other hand, the hard silicon particles carried by the high-speed airflow continuously impact the pipes and equipment in the next process, causing severe erosion and wear, leading to frequent pipe wear and a sharp reduction in equipment lifespan. The resulting high maintenance and replacement costs and frequent downtime for maintenance further increase production and operating costs. Utility Model Content

[0005] The purpose of this invention is to provide a separation device for separating silicon material, so as to solve the problems mentioned in the background art.

[0006] The technical solution adopted in this utility model is:

[0007] A separation device for separating silicon materials includes:

[0008] The separation body is provided with an inlet channel and an outlet channel. The inlet channel is installed obliquely downward according to the tangent angle of the inlet airflow and is connected to the previous process equipment. The outlet channel is connected to the next process equipment.

[0009] A reflector is disposed within the separation body;

[0010] in,

[0011] The separation entity includes:

[0012] The cylindrical section has an outwardly expanding first conical section at its lower end, and an inwardly contracting second conical section at its lower end.

[0013] The reflector is located between the first conical segment and the second conical segment, and there is a gap between the reflector and the inner wall of the first and second conical segments.

[0014] Optionally, a collection frame is provided at the lower end of the second conical segment.

[0015] Optionally, the first conical section has a narrow top and wide bottom structure, and its upper end dimension is the same as that of the straight cylindrical section.

[0016] Optionally, the second conical segment has a structure that is wider at the top and narrower at the bottom, and its upper end face has the same dimensions as the lower end face of the first conical segment.

[0017] Optionally, both the first conical segment and the second conical segment are conical structures.

[0018] Optionally, a circular hole is provided at the center of the reflector.

[0019] Optionally, the outer wall of the second conical segment is provided with a vibration assembly.

[0020] Optionally, the vibration assembly includes:

[0021] A mounting cover is fitted onto the outer wall of the second conical section, and multiple connecting rods are hinged to the inner wall of the mounting cover.

[0022] A vibration head is located at one end of the connecting rod, and a latex protective pad is provided on it;

[0023] Multiple cylinders are hinged to the inner wall of the mounting cover, and their telescopic ends are hinged to the connecting rod.

[0024] Optionally, a protective cover is provided on the outer wall of the second conical segment, and the protective cover is located inside the mounting cover.

[0025] Optionally, the inlet channel, the straight section, the inner wall of the first conical section, and the windward surface of the reflector are all coated with a wear-resistant coating.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] In this invention, a downwardly inclined air inlet channel generates high-speed airflow rotation, while an outwardly expanding first conical section immediately below the straight section slows down the airflow and separates silicon particles. The separated silicon particles fall through the gap between the reflector and the first conical section into the second conical section, and finally reach the collection frame for collection, effectively improving the recovery rate. The gas containing the separated silicon particles is then sent to the next process through the outlet channel, thus solving the problem in the prior art where high-speed airflow carrying hard silicon particles causes severe erosion and wear, leading to frequent pipe wear and a sharp reduction in equipment life. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of this application;

[0030] Figure 2 This is a schematic diagram showing the position, structure, and gas flow direction of the protective cover and the second cone section in this application;

[0031] Figure 3 This is a schematic diagram showing the location and structure of the vibration assembly, protective cover, and second cone segment in this application.

[0032] Figure label:

[0033] 1. Separated main body; 11. Straight cylinder section; 12. First conical section; 13. Second conical section;

[0034] 2. Import channels; 3. Export channels;

[0035] 4. Reflector; 41. Circular aperture;

[0036] 5. Vibration assembly; 51. Mounting cover; 52. Connecting rod; 53. Vibration head; 54. Cylinder; 55. Latex protective pad;

[0037] 6. Protective cover; 7. Collection box. Detailed Implementation

[0038] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0039] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] Currently, during negative pressure ventilation, high-speed airflow carries away a large amount of qualified fine silicon particles, which cannot be effectively recovered. This not only directly reduces the product recovery rate but also causes significant economic losses. Furthermore, the hard silicon particles carried by the high-speed airflow continuously impact the pipes and equipment in the next process, causing severe erosion and wear, leading to frequent pipe wear and a sharp reduction in equipment lifespan. The resulting high repair and replacement costs and frequent downtime for maintenance further increase production and operating costs.

[0041] like Figures 1-3 As shown in the figure, this utility model embodiment provides a separation device for separating silicon material, which mainly includes: a separation body 1, an inlet channel 2, and an outlet channel 3.

[0042] The separation body 1 is equipped with an inlet channel 2 and an outlet channel 3. The inlet channel 2 is connected to the previous process equipment (such as a screening device), and the outlet channel 3 is connected to the next process equipment via a pipe. The separation body 1 is configured to separate silicon particles carried in a high-speed airflow.

[0043] Specifically, such as Figure 2 As shown, the separation body 1 includes several parts such as a straight cylindrical section 11, a first conical section 12, and a second conical section 13.

[0044] The cylindrical section 11 has an integrally formed first conical section 12 extending outward at its lower end, and an integrally formed second conical section 13 extending inward at its lower end. A reflector 4 is disposed between the first conical section 12 and the second conical section 13. High-speed airflow enters the cylindrical section 11 through the inlet channel 2, separates from the silicon particles, encounters the reflector 4, and is then reflected upward and flows out through the outlet channel 3. The silicon particles fall from the reflector 4 into the second conical section 13.

[0045] More specifically, the inlet channel 2 is installed obliquely downward according to the tangential angle of the inlet airflow, so that the high-speed airflow can generate intense rotation after entering the straight section 11 and spiral downward along the straight section 11 (outer swirling flow).

[0046] The first conical section 12 has a narrower top and wider bottom structure. The upper part of the first conical section 12 has the same dimensions as the straight section 11. The high-speed airflow carrying silicon particles enters the first conical section 12 from the straight section 11. Due to the increased opening diameter, the wind speed begins to decrease, and the degree of wind speed reduction depends on the inclination angle between the outer slope of the first conical section 12 and the horizontal plane. Preferably, in this embodiment, the inclination angle between the outer slope of the first conical section 12 and the horizontal plane is 60°. The closer to the lower part of the first conical section 12, the lower the wind speed. When the gravity of the silicon particles can overcome the corresponding centrifugal force, they will undergo free fall under the action of gravity.

[0047] The second conical segment 13 is located at the lower end of the first conical segment 12 and has a structure that is wider at the top and narrower at the bottom. The upper end face of the second conical segment 13 has the same size as the lower end face of the first conical segment 12. After the silicon particles fall, they will slide along the inner side of the second conical segment 13 to the bottom.

[0048] Furthermore, in this embodiment, both the first conical segment 12 and the second conical segment 13 are conical structures to prevent eccentric flow when the high-speed airflow flows downward.

[0049] The reflector 4 is located between the first conical section 12 and the second conical section 13, and a gap is left between the reflector 4 and the inner walls of the first conical section 12 and the second conical section 13. The reflector 4 serves two purposes: firstly, it reflects the high-speed airflow entering the straight section 11. That is, after being reflected by the reflector 4, the purified high-speed airflow rises along the central axis region of the separation body 1 (internal swirling flow). Secondly, it filters the silicon particles into the lower second conical section 13. Preferably, the reflector 4 has a conical structure with the apex facing upwards, which facilitates the reflection of the high-speed airflow. At the same time, after the silicon particles fall onto the inclined surface of the cone, they roll to both sides along the inclined surface.

[0050] Furthermore, the reflector 4 is connected to the first conical section 12 via a connecting frame (not shown in the figure), which can accommodate silicon particles to pass through and enter the second conical section 13. Silicon particles falling along the inner wall of the first conical section 12 and silicon particles rolling along the reflector 4 to the edge fall into the second conical section 13 from the edge gap between the reflector 4 and the first conical section 12.

[0051] Furthermore, a small circular hole 41 is opened in the center of the reflector 4. Since a small amount of wind may also enter the second cone section 13 from the edge gap between the reflector 4 and the first cone section 12, the small circular hole 41 opened in the center of the reflector 4 can discharge such wind from the second cone section 13.

[0052] Furthermore, to improve wear resistance, in this embodiment, a wear-resistant coating is applied to the inner walls of the inlet channel 2, the straight section 11, the first conical section 12, and the windward side of the reflector 4.

[0053] Furthermore, such as Figure 1 As shown, the outer wall of the second conical section 13 is provided with a vibration assembly 5.

[0054] Specifically, such as Figure 3 As shown, the vibration assembly 5 includes several parts such as a mounting cover 51, a connecting rod 52, a vibration head 53, and a cylinder 54.

[0055] The mounting cover 51 is fixedly sleeved on the outer wall of the second conical section 13. Multiple connecting rods 52 are hinged to the inner wall of the mounting cover 51, and a metal vibration head 53 is fixedly mounted at one end of each connecting rod 52. Multiple cylinders 54 are hinged to the inner wall of the mounting cover 51, with the telescopic ends of the cylinders 54 hinged to the outer wall of the connecting rods 52. The cylinders 54 drive the connecting rods 52 to move, and the connecting rods 52 drive the vibration head 53 to vibrate the outer wall of the second conical section 13, thereby dislodging silicon particles from the inner wall of the second conical section 13 and preventing the accumulation of silicon particles on the inner wall of the second conical section 13, which could lead to blockage.

[0056] Furthermore, to prevent the impact head 53 from damaging the second conical section 13 when it strikes the outer wall of the second conical section 13, in this embodiment, a latex protective pad 55 is fixedly provided on the hammering end of each metal impact head 53.

[0057] Furthermore, to further enhance the protection of the outer wall of the second conical segment 13, in this embodiment, a protective cover 6 is fixedly provided on the outer wall of the second conical segment 13, and the protective cover 6 is located inside the mounting cover 51.

[0058] Furthermore, to facilitate the collection of the separated silicon particles, a collection frame 7 is provided at the lower end of the second conical section 13 in this embodiment. The silicon particles enter the collection frame 7 through the second conical section 13 for subsequent processing.

[0059] In specific operation, when the gas containing silicon particles enters through the inlet channel 2, the high-speed airflow begins to rotate violently, throwing the silicon particles against the inner wall and diffusing through the airflow to the first conical section 12. At this time, the downward flowing airflow comes into contact with the reflector 4 and is reflected by the reflector 4. Then it moves upward along the center of the straight section 11 and is discharged through the outlet channel 3 to the next process. A small amount of airflow and silicon particles continue to diffuse along the conical surface of the first conical section 12. As the silicon particles continuously collide with the inner wall of the first conical section 12, the force becomes smaller and smaller. When its gravity overcomes the centrifugal force, it begins to fall downward. The falling silicon particles and a small amount of airflow fall into the second conical section 13 from the edge gap between the reflector 4 and the first conical section 12. At this time, the separation of silicon particles is completed. A small amount of gas in the second conical section 13 is discharged from the separation body 1 through the small round hole 41 in the middle of the reflector 4 with the reflected gas. When it is necessary to clean the silicon particles on the inner wall of the second conical section 13, the cylinder 54 is activated, the cylinder 54 drives the connecting rod 52 to move, the connecting rod 52 drives the vibrating head 53 to vibrate the outer wall of the second conical section 13, thereby shaking off the silicon particles accumulated on the inner wall of the second conical section 13, so that the silicon particles can enter the collection frame 7 efficiently for convenient centralized collection.

[0060] It should be noted that the separation device in this embodiment is suitable for capturing silicon particles with a diameter of 5 to 10 μm or larger.

[0061] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A separation device for separating silicon materials, characterized in that, include: The separation body has an inlet channel and an outlet channel. The inlet channel is installed obliquely downward according to the tangent angle of the inlet airflow and is connected to the previous process equipment. The outlet channel is connected to the next process equipment. A reflector is disposed inside the separation body. The separation body includes: a straight cylindrical section with an outwardly expanding first conical section at its lower end and an inwardly contracting second conical section at its lower end; the reflector is located between the first conical section and the second conical section, and a gap is left between the reflector and the inner walls of the first and second conical sections.

2. The separation device according to claim 1, characterized in that, A collection frame is provided at the lower end of the second cone segment.

3. The separation device according to claim 1, characterized in that, The first conical section has a narrow top and wide bottom structure, and its upper end dimension is the same as that of the straight cylindrical section.

4. The separation device according to claim 1, characterized in that, The second conical segment has a structure that is wider at the top and narrower at the bottom, and its upper end face has the same dimensions as the lower end face of the first conical segment.

5. The separation device according to claim 1, characterized in that, Both the first conical segment and the second conical segment are conical structures.

6. The separation device according to claim 1, characterized in that, A circular hole is provided at the center of the reflector.

7. The separation device according to claim 1, characterized in that, The outer wall of the second conical section is equipped with a vibration assembly.

8. The separation device according to claim 7, characterized in that, The vibration assembly includes: a mounting cover fitted onto the outer wall of the second conical section, with multiple connecting rods hinged to the inner wall of the mounting cover; a vibration head disposed at one end of the connecting rods, with a latex protective pad disposed thereon; and multiple cylinders hinged to the inner wall of the mounting cover, with their telescopic ends hinged to the connecting rods.

9. The separation device according to claim 8, characterized in that, The outer wall of the second conical section is provided with a protective cover, which is located inside the mounting cover.

10. The separation device according to claim 1, characterized in that, The inlet channel, the straight section, the inner wall of the first conical section, and the windward surface of the reflector are all coated with a wear-resistant coating.

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