Granular polycrystalline silicon rejection device

Abstract

The utility model discloses a granular polycrystalline silicon rejection device. The granular polycrystalline silicon rejection device comprises an upper mechanism, a lower mechanism, a gasket and a filter plate, the upper mechanism comprises an upper body and an upstream pipeline, the upstream pipeline is mounted at the top of the upper body, and the bottom of the upper body is connected with the lower mechanism; the lower mechanism comprises a lower body and a downstream pipeline, the downstream pipeline is installed at the bottom of the lower body, and the upper portion of the lower body is connected with the bottom of the upper body; the gasket is arranged at the joint of the bottom of the upper body and the upper part of the lower body; and the filter plate is embedded into the lower body and is close to the gasket. Therefore, the risk of introducing foreign matters can be avoided, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of machinery, and in particular to a device for removing granular polycrystalline silicon. Background Technology

[0002] In chemical production, pipelines are important transport components that connect the entire system. The common types of transported media are gas, liquid, and solid. Through connection with equipment, they are used to transport, distribute, mix, separate, discharge, meter, or control fluid flow.

[0003] Granular polycrystalline silicon is transported in a closed loop using pipelines. If foreign objects enter the pipeline, they may block downstream equipment, valves, etc., which is not conducive to the stable operation of production. Opening the pipeline, on the other hand, may introduce contamination, which may reduce product quality or even damage the pipeline.

[0004] In the process of realizing this utility model, the inventors discovered that in the material handling system of the existing granular polycrystalline silicon rejection device, the loosening of equipment bolts, wear of raw and auxiliary materials and non-metallic debris may be introduced into the product, which will reduce the flowability of materials in the pipeline. It is necessary to manually disassemble the pipeline section by section to check, which will increase the area of ​​pollution introduced by humans, consume manpower and restrict the operation of the production line.

[0005] It was also found that current granular polysilicon production tends to rely on fully automated small packaging. Materials are collected in small bags and transported to downstream equipment via conveyor belts for labeling and boxing. To prevent the introduction of metallic or non-metallic foreign objects into each bag, metal detectors are added to the conveyor belt to reject abnormal small bags, ensuring zero customer complaints. However, the sensitivity of metal detectors is affected by surrounding metal parts and the equipment itself, which reduces the detector's sensitivity and increases the possibility of false detections. Furthermore, some non-metallic foreign objects are not magnetic, so the metal detector cannot identify them and will not perform the rejection action. When the finished bags are repackaged and sold, quality complaints will arise, affecting profits. Utility Model Content

[0006] In view of this, the present invention provides a foreign matter rejection device for granular polycrystalline silicon, which can eliminate the risk of introducing foreign matter and extend service life.

[0007] To achieve the above objectives, an embodiment of the present invention provides a granular polycrystalline silicon rejection device, comprising an upper mechanism, a lower mechanism, a gasket, and a filter plate; the upper mechanism includes an upper body and an upstream pipe, wherein the upstream pipe is installed on the top of the upper body, and the bottom of the upper body is connected to the lower mechanism; the lower mechanism includes a lower body and a downstream pipe, wherein the downstream pipe is installed on the bottom of the lower body, and the upper part of the lower body is connected to the bottom of the upper body; the gasket is disposed at the connection between the bottom of the upper body and the upper part of the lower body; the filter plate is embedded in the lower body and close to the gasket, and the filter plate has uniformly distributed pores.

[0008] Optionally, the upstream pipeline includes an upper port with a flange for feeding, and the downstream pipeline includes a lower port with a flange for discharging.

[0009] Optionally, the upper body adopts a cylindrical design.

[0010] Optionally, the lower body adopts a tapered design.

[0011] Optionally, the downstream pipeline adopts a tee design, and each port is equipped with a flange.

[0012] Optionally, the outer surfaces of the upper mechanism and the lower mechanism are respectively made of metal.

[0013] Optionally, the inner surface of the upper mechanism and the inner surface of the lower mechanism are respectively coated with wear-resistant material or lined with non-metallic material.

[0014] Optionally, the upstream pipeline is inclined.

[0015] One embodiment of the above-mentioned utility model has the following advantages or beneficial effects: The present utility model provides a granular polycrystalline silicon rejection device, which can intercept foreign objects in the pipeline, avoid multiple openings in the pipeline, and eliminate the risk of introducing foreign objects; in addition, by embedding the filter plate in the lower part of the device, the filter plate will not be damaged due to pipeline compression, thus better protecting the filter plate and extending its service life.

[0016] The further effects of the aforementioned unconventional alternative methods will be explained below in conjunction with specific implementation methods. Attached Figure Description

[0017] The accompanying drawings are provided to better understand this utility model and do not constitute an undue limitation thereof. Wherein:

[0018] Figure 1 This is a schematic diagram of the structure of the rejection device for granular polycrystalline silicon according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the filter plate according to an embodiment of the present utility model. Detailed Implementation

[0020] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of the present invention, including various details to aid understanding. These embodiments should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0021] At least one embodiment of this utility model provides a rejection device for granular polycrystalline silicon, such as Figure 1 As shown, the granular polycrystalline silicon rejection device may include an upper mechanism 1, a lower mechanism 3, a gasket 5, and a filter plate 2. In an embodiment, the upper mechanism 1 includes an upper body and an upstream pipe, with the upstream pipe installed on the top of the upper body and the bottom of the upper body connected to the lower mechanism. The lower mechanism 3 includes a lower body and a downstream pipe, with the downstream pipe installed on the bottom of the lower body and the upper part of the lower body connected to the bottom of the upper body. The gasket 5 is disposed at the connection between the bottom of the upper body and the upper part of the lower body, and the filter plate 2 is embedded in the lower body and close to the gasket 5.

[0022] Preferred embodiments, such as Figure 2 As shown, the filter plate 2 has appropriately sized holes to accommodate the material size, preventing bridging between particles during flow. The filter plate 2 can have uniformly distributed pores with consistent pore size, allowing non-metallic foreign objects carried in the material to be intercepted on the upper surface of the filter plate 2 by the material's own gravity-driven flow.

[0023] Furthermore, the filter plate 2 can be made of metal or non-metal materials, and its surface can be coated with a wear-resistant material or lined with a clean material. The filter plate 2 can be replaced periodically after wear occurs, and its pore size and distribution are appropriate to avoid affecting the packaging of downstream materials.

[0024] It is worth noting that the upstream pipeline can be installed at an angle, which is beneficial for material feeding and waste removal. Furthermore, a PTFE gasket 5 is used to seal the upper mechanism 1 and the lower mechanism 3, and bolts are used for fixing.

[0025] In addition, the outer surfaces of the upper mechanism 1 and the lower mechanism 3 can be made of metal, for example, 304 series stainless steel, carbon steel, etc. The inner surfaces of the upper mechanism 1 and the lower mechanism 3 can be coated with wear-resistant materials or lined with non-metallic materials.

[0026] In some preferred embodiments, the upstream pipeline of this invention includes an upper port with a flange for feeding, and the downstream pipeline includes a lower port with a flange for discharging. Preferably, the flanges can be connected using loose flanges, which facilitates angle adjustment, disassembly, or installation at any angle, and is not subject to damage to the lining or gas leakage due to excessive stress.

[0027] In some further embodiments of this utility model, the downstream pipeline adopts a tee design and each port is equipped with a flange, which can change the direction of material flow.

[0028] In some other preferred embodiments of this utility model, the upper body can be cylindrical in shape, which can increase the storage space for upstream feed. Furthermore, the upper body can be integrally formed with its inner surface lining of non-metallic material, thereby avoiding multiple splicing of the lining and reducing the risk of detachment and damage.

[0029] In some other embodiments of this utility model, the lower body of this utility model can adopt a conical design, thereby avoiding cross-mixing caused by long-term material accumulation and effectively preventing dust accumulation.

[0030] In some embodiments of this utility model, if the granular polycrystalline silicon discharge device is subjected to flammable gases, high temperatures, or high pressures during the feeding process, the upper mechanism 1 needs to be integrally formed without the need for observation holes 4 to ensure personnel and equipment safety during operation. In the granular polycrystalline silicon discharge device of this utility model, if the material flow during the feeding process relies solely on its own gravity and is not affected by temperature, pressure, or gas, then the upper mechanism 1 has observation holes 4 on its side wall, and an observation hole cover is added for sealing and protection. The observation hole cover can be opened at any time to check the filter plate for blockage. Additionally, when there is material blockage or periodic inspection is required, the observation hole cover can be opened to clean the foreign matter accumulated on the filter plate 2 through the observation hole 4. This operation is convenient and will not affect production.

[0031] Ideally, the material selected for the observation hole cover should be non-contaminated to the polycrystalline silicon product flowing within the upper mechanism 1.

[0032] In summary, the foreign matter removal device for granular polycrystalline silicon described in this utility model can intercept foreign objects introduced upstream before finished product packaging without disassembling the pipeline section by section for inspection; when the downstream packaging feed is slow, the valve installed on the foreign matter removal device for granular polycrystalline silicon can be controlled; the blockage can be checked through the observation hole on the side of the upper mechanism to avoid affecting the processing capacity of the production line, and it is especially suitable for use under working conditions where the material temperature is ≤60℃ and the pressure is ≤10kpa.

[0033] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A rejection device for granular polycrystalline silicon, characterized in that, include: Upper mechanism, lower mechanism, gaskets and filter plates; The upper mechanism includes an upper body and an upstream pipe, with the upstream pipe installed on the top of the upper body and the bottom of the upper body connected to the lower mechanism. The lower mechanism includes a lower body and a downstream pipe, and the downstream pipe is installed at the bottom of the lower body, and the upper part of the lower body is connected to the bottom of the upper body; The gasket is disposed at the connection between the bottom of the upper body and the upper part of the lower body; The filter plate is embedded in the lower body and close to the gasket, and the filter plate has uniformly distributed pores.

2. The rejection device for granular polycrystalline silicon according to claim 1, characterized in that, include: The upstream pipeline includes an upper port with a flange for feeding, and the downstream pipeline includes a lower port with a flange for discharging.

3. The rejection device for granular polycrystalline silicon according to claim 1, characterized in that, include: The upper body adopts a cylindrical design.

4. The rejection device for granular polycrystalline silicon according to claim 1, characterized in that, include: The lower body adopts a tapered design.

5. The rejection device for granular polycrystalline silicon according to claim 1, characterized in that, include: The downstream pipeline adopts a tee design, and each port is equipped with a flange.

6. The rejection device for granular polycrystalline silicon according to claim 1, characterized in that, include: The outer surfaces of the upper mechanism and the lower mechanism are respectively made of metal.

7. The rejection device for granular polycrystalline silicon according to claim 1, characterized in that, include: The inner surfaces of the upper mechanism and the lower mechanism are respectively coated with wear-resistant material or lined with non-metallic material.

8. The rejection device for granular polycrystalline silicon according to any one of claims 1-7, characterized in that, include: The upstream pipeline is installed at an angle.

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