Screening machine capable of reducing content of silicon material powder
By setting channels and air holes inside the crossbeam of the linear vibrating screen, and using high-pressure gas to form an air curtain, the problem of silicon powder adhesion is solved, thereby reducing the silicon powder content and improving the quality of silicon.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-10
AI Technical Summary
In the process of screening silicon material using existing linear vibrating screens, silicon powder cannot be completely removed by the dust removal equipment, resulting in an increase in the powder content of the silicon material and affecting its quality.
Channels and air holes are set inside the crossbeam of the linear vibrating screen. High-pressure gas is provided by an air compressor to form an air curtain to blow away the material and reduce the powder content.
This effectively reduces the powder content in silicon material and improves its quality.
Smart Images
Figure CN224101201U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the polycrystal silicon production field, specifically relates to a screening machine that can reduce the content of silicon powder. BACKGROUND
[0002] At present, the silicon industry in China is developing rapidly, and the screening of silicon materials has become a mechanized production mode. While the production capacity is increasing rapidly, the quality requirements for silicon materials are becoming more and more stringent. The existing screening machine adopts a linear vibrating screen. The structure of the linear vibrating screen mainly includes a shell structure. The top of the shell structure can be connected to a dust removal device, and one side has a feed inlet. A plurality of (usually three) screen plates are arranged in the shell structure. A discharge outlet corresponding to the plurality of screen plates is arranged at one end of the shell structure. Each screen plate is supported by a cross beam in the shell structure. A vibration machine for vibration is installed at the bottom of the shell structure.
[0003] The silicon powder generated during the screening of the screening machine cannot be completely removed by the dust removal device. Part of the silicon powder will adhere to the silicon material, increasing the powder content in the silicon material and affecting the quality of the silicon material. SUMMARY
[0004] The purpose of the utility model is to provide a screening machine that can reduce the content of silicon powder.
[0005] The utility model is implemented by the following technical solutions:
[0006] A screening machine that can reduce the content of silicon powder, comprising a linear vibrating screen, a channel is arranged in a plurality of cross beams of the linear vibrating screen, one end of the channel is in communication with the shell of the corresponding linear vibrating screen, a plurality of air holes are arranged on the top of each cross beam, the air holes are in communication with the channel;
[0007] Further comprising an air compressor, the air outlet of the air compressor is connected to one end of each channel through a valve and a pipeline.
[0008] Preferably, the air holes are inclined upward by 45 degrees.
[0009] Preferably, in the cross beam away from the feed inlet of the linear vibrating screen, the air holes are directed towards the feed inlet of the linear vibrating screen.
[0010] The utility model has the advantages that when the linear vibrating screen screens the material, high-pressure gas is blown out through a plurality of air holes arranged on the cross beam of the vibrating screen itself, forming a wind curtain that blows the material moving during screening. To a certain extent, the powder content of the screened material is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.
[0012] Figure 1 It is a schematic view of the overall structure of the present application.
[0013] Figure 2 It is a sectional view of the overall structure of the present application.
[0014] Figure 3 It is Figure 2 a local enlarged schematic view of A in
[0015] Figure 4 It is a schematic view of the beam structure.
[0016] In the figure: linear vibrating screen 1, beam 1.1, feed inlet 1.2, channel 2, air hole 3, air compressor 4, valve 5, pipeline 6. DETAILED DESCRIPTION
[0017] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0018] As Figure 1 , Figure 2 , Figure 3 and Figure 4 indicated, a screening machine capable of reducing the content of silicon powder, comprising a linear vibrating screen 1, a plurality of beams 1.1 in the linear vibrating screen 1 are provided with channels 2, one end of each channel 2 is communicated with the corresponding shell of the linear vibrating screen 1, a plurality of air holes 3 are arranged on the top of each beam 1.1, and the air holes 3 are communicated with the channels 2.
[0019] Further comprising an air compressor 4, the air outlet of the air compressor 4 is connected with one end of each channel 2 through a valve 5 and a pipeline 6, and the pipeline 6 can be a hose.
[0020] When the linear vibrating screen 1 is used, feeding is carried out through the feeding port 1.2 at one end, and screening is carried out through the discharging port at the other end, during which the air compressor 4 supplies air to the multiple beams 1.1 of each layer through the pipeline 6, the air enters the passages 2, and the high-pressure air in each passage 2 is sprayed out of the multiple air holes 3 to form an air curtain, the material screening and moving passes through the air curtain and can be blown, and the powder attached to the material is blown away as much as possible, thereby reducing the powder content of the material.
[0021] In actual production, the air source can be instrument air.
[0022] Preferably, the air holes 3 are arranged at an angle of 45° upward.
[0023] Preferably, among the beams 1.1 away from the feeding port 1.2 of the linear vibrating screen 1, the air holes 3 are arranged to face the feeding port 1.2 of the linear vibrating screen 1. Figure 2 As shown, the air holes 3 away from the feeding port 1.2 are arranged to face the feeding port 1.2 in a dashed arrow direction, which is opposite to the feeding direction of the material indicated by a solid arrow, so that the material can be better blown in the reverse direction, the movement of the material is delayed, the screening time of the material is longer, the screening is more sufficient, and more powder is left.
[0024] The air holes 3 of the beams 1.1 close to the feeding port 1.2 face the feeding port 1.2, and can also blow the material.
[0025] Working principle: when the linear vibrating screen 1 is running, feeding is carried out through the feeding port 1.2, during which the air compressor 4 supplies air to the multiple beams 1.1 of each layer through the pipeline 6, the air is sprayed out of the multiple air holes 3 through the passages 2 to form an air curtain, the material screening and moving passes through the air curtain and can be blown, and the powder attached to the material is blown away as much as possible, thereby reducing the powder content of the material.
[0026] Advantages: when the linear vibrating screen 1 screens the material, the high-pressure air is sprayed out of the multiple air holes 3 arranged on the beams 1.1 of the vibrating screen itself to form an air curtain, the material in the screening and moving state is blown, and the powder content of the screened material can be reduced to a certain extent.
[0027] The above only describes the preferred embodiments of the utility model, and does not limit the utility model, and 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 screening machine capable of reducing the content of silicon fines in the powder, comprising a linear vibrating screen, characterized in that, A plurality of channels are arranged in the plurality of cross beams of the linear vibrating screen, one end of each channel is communicated with the corresponding shell of the linear vibrating screen, and a plurality of air holes are arranged on the top of each cross beam in a row and at intervals, and the air holes are communicated with the channels. An air compressor is further arranged, and the air outlet of the air compressor is connected with one end of each channel through a valve and a pipeline.
2. A screening machine capable of reducing the content of silicon fines in the screened material according to claim 1, characterized in that: The air holes are arranged at an angle of 45 degrees upward.
3. A screening machine capable of reducing the content of silicon fines in the screened material according to claim 1, characterized in that: The air holes in the cross beam away from the feed inlet of the linear vibrating screen are arranged to face the feed inlet of the linear vibrating screen.