Air shower dust removal device for silicon material screening

Abstract

The utility model discloses an air shower dust removal device for silicon material screening, which comprises a screening box body, a feeding bin opening arranged on the side surface of the top of the screening box body, an air inducing cover arranged on the top of the screening box body and connected with an induced draft fan, and a plurality of grading vibrating screens arranged in the screening box body. One side of the grading vibrating screen is connected to a screening material collecting box arranged on the screening box body, and a grading discharging opening is formed in one side of the screening material collecting box; an air knife is arranged above the grading vibrating screen, the two ends of the air knife are fixed to the screening box body, and a compressed air connecting pipe is arranged on one side of the air knife and arranged outside the screening box body. A bottom discharging opening is formed in the bottom of the screening box body. The air knife is arranged above each stage of grading vibrating screen, dust is blown up while the vibrating screen screens, the dust is pumped out of the screening box body through the induced draft cover and the induced draft fan at the top of the screening box body, the structure is simple, all-directional dust removal is achieved, and the dust removal effect is good.

Description

Technical Field

[0001] The utility model relates to the technical field of screening and dust removal, in particular to an air shower dust removal device for silicon material screening. Background Art

[0002] In the production of solar-grade and electronic-grade polysilicon, a crusher is required to break polysilicon rods into blocks without pollution, and then they are screened and classified by a multi-stage screening machine and then packaged. When screening silicon materials, the screening machine uses the exciting force generated by the vibrator to make the materials move on the screen, and realizes the screening and separation of silicon materials through different pore sizes from large to small of the upper and lower screens. The silicon materials rub against each other during the screening process, and the generated dust adhering to the silicon materials will affect the quality of the silicon materials.

[0003] The existing publication number CN214532954U discloses a polysilicon crushing and feeding device and system. The device includes multi-stage vibrating screens arranged from top to bottom. Adjacent two-stage vibrating screens are connected through a first screen. The screen hole sizes of multiple first screens decrease sequentially from top to bottom. A receiving box communicated with the vibrating screen is arranged on the side of each stage of vibrating screen. A purging pipe is arranged at the top of the receiving box. One end of the purging pipe extends into the receiving box, and the other end is used to be connected with a purging device. The end of the purging pipe extending into the receiving box is opened towards the bottom of the receiving box; a dust removal interface is arranged on each stage of vibrating screen for communicating with a dust removal device. Although this device can remove dust, there is a dust removal interface on each stage of vibrating screen, the structure is relatively complex, and the end of the purging pipe extending into the receiving box is opened towards the bottom of the receiving box, so the purging can only be partial and cannot effectively remove dust. Summary of the Utility Model

[0004] The purpose of the utility model is to solve the defects existing in the prior art, and to propose an air shower dust removal device for silicon material screening.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An air shower dust removal device for silicon material screening, including a screening box body. An inlet bin opening is arranged on the side of the top of the screening box body. An air draft hood is arranged on the top of the screening box body. The air draft hood is connected to an induced draft fan. A plurality of grading vibrating screens are arranged in the screening box body. One side of the grading vibrating screen is connected to a screening aggregate box arranged on the screening box body. A grading discharge port is arranged on one side of the screening aggregate box; an air knife is arranged above the grading vibrating screen. Both ends of the air knife are fixed on the screening box body. A compressed air connecting pipe is arranged on one side of the air knife. The compressed air connecting pipe is arranged outside the screening box body; a bottom discharge port is arranged at the bottom of the screening box body.

[0007] The compressed air connecting pipe is connected to an air compressor, and the air compressor is connected to an air precision filter. The air compressed by the air compressor is first filtered by the air precision filter to remove dust and impurities in the air.

[0008] The induced draft fan is connected to the bag filter through a pipeline. The induced draft fan sucks the dust in the screening box body, leads it to the bag filter through the pipeline, and discharges it after dust removal.

[0009] An air flow regulating valve is arranged on the compressed air connecting pipe.

[0010] The sieve holes of the grading vibrating screens distributed from top to bottom in the screening box body gradually decrease, and the screened particles fall into the bottom discharge port for regular cleaning.

[0011] Above one of the grading vibrating screens, there are more than 1 air knives, and the air outlets of the air knives are obliquely aligned with the grading vibrating screen.

[0012] Above one of the grading vibrating screens, there are 2 air knives, and the 2 air knives are evenly distributed above the grading vibrating screen.

[0013] The grading vibrating screen is obliquely arranged, and the oblique angle is less than 20 degrees. The upper and lower grading vibrating screens are arranged oppositely, and the screening aggregate box is arranged on the side with a lower slope of the grading vibrating screen.

[0014] The beneficial effects of the present utility model are as follows: Air knives are arranged above each stage of the grading vibrating screen. While the vibrating screen is screening, the dust is blown up, and the dust is sucked out of the screening box body through the air draft cover and the induced draft fan at the top of the screening box body. The structure is simple, the dust removal is comprehensive, and the dust removal effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the structural diagram of the present utility model;

[0016] Figure 2 is the rear structural diagram of the present utility model;

[0017] In the figure: 1. Screening box body; 2. Feed bin opening; 3. Screening aggregate box; 4. Grading discharge port;

[0018] 5. Bottom discharge port; 6. Grading vibrating screen; 7. Air knife; 8. Compressed air connecting pipe; 9. Air flow regulating valve; 10. Induced draft fan. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Embodiment 1

[0020] As Figure 1-2As shown in the figure, the utility model provides an air shower dust removal device for silicon material screening, and its structure is as follows: it includes a screening box body 1, an inlet bin opening 2 is arranged on the side of the top of the screening box body 1, an air draft hood is arranged on the top of the screening box body 1, the air draft hood is connected to an induced draft fan 10, the induced draft fan 10 is connected to a bag filter through a pipeline, the induced draft fan 10 sucks the dust in the screening box body 1, leads it to the bag filter through the pipeline, and discharges it after dust removal;

[0021] A plurality of grading vibrating screens 6 are arranged in the screening box body 1. The screen holes of the grading vibrating screens 6 distributed from top to bottom in the screening box body 1 decrease in sequence. The grading vibrating screens 6 are obliquely arranged, and the oblique angle is 15 degrees. The upper and lower grading vibrating screens 6 are arranged oppositely. The lower side of the grading vibrating screen 6 with an oblique direction is connected to a screening aggregate box 3 arranged on the screening box body 1, and a grading discharge port 4 is arranged on one side of the screening aggregate box 3;

[0022] There are 2 air knives 7 arranged above the grading vibrating screen 6. The 2 air knives 7 are evenly distributed above the grading vibrating screen 6. Both ends of the air knife 7 are fixed on the screening box body 1, and the air outlet of the air knife 7 is obliquely aligned with the grading vibrating screen 6; there is a compressed air connecting pipe 8 arranged on one side of the air knife 7. The compressed air connecting pipe 8 is arranged outside the screening box body 1, and an air flow regulating valve 9 is arranged on the compressed air connecting pipe 8; the compressed air connecting pipe 8 is connected to an air compressor, and the air compressor is connected to an air precision filter. The air compressed by the air compressor is first filtered by the air precision filter;

[0023] A bottom discharge port 5 is arranged at the bottom of the screening box body 1; the screened particles fall into the bottom discharge port 5 and are cleaned regularly;

[0024] Specifically, during the screening process, the high-speed air flow generated by the air knife 7 assembly cuts and rolls away the dust generated during the screening process, and sucks it into the bag filter through the air draft hood at the top of the screening box body 1 for dust removal and discharge; the air flow regulating valve 9 can adjust the air flow speed according to the actual situation to adapt to different screening conditions and dust characteristics.

Claims

1. An air shower dust removal device for silicon material screening, characterized in that: It includes a screening box, a feeding bin opening is arranged on the top side of the screening box, an induced draft hood is arranged on the top of the screening box, the induced draft hood is connected to the induced draft fan, a plurality of graded vibrating screens are arranged in the screening box, one side of the graded vibrating screen is connected to a screening aggregate box arranged on the screening box, and one side of the screening aggregate box is provided with a graded discharge port; an air knife is arranged above the graded vibrating screen, both ends of the air knife are fixed on the screening box, a compressed air connecting pipe is arranged on one side of the air knife, and the compressed air connecting pipe is arranged outside the screening box; a bottom discharge port is arranged at the bottom of the screening box.

2. The air shower dust removal device for silicon material screening according to claim 1, characterized in that: The compressed air connecting pipe is connected to an air compressor, and the air compressor is connected to an air precision filter.

3. The air shower dust removal device for silicon material screening according to claim 1, characterized in that: The induced draft fan is connected to the bag dust collector through a pipeline.

4. The air shower dust removal device for silicon material screening according to claim 1, characterized in that: The compressed air connecting pipe is provided with an air flow regulating valve.

5. The air shower dust removal device for silicon material screening according to claim 1, characterized in that: The sieve holes of the graded vibrating screens distributed from top to bottom in the screening box are reduced in sequence.

6. The air shower dust removal device for silicon material screening according to claim 5, characterized in that: More than one air knife is arranged above the grading vibrating screen, and the air outlet of the air knife is obliquely aligned with the grading vibrating screen.

7. The air shower dust removal device for silicon material screening according to claim 6, characterized in that: The grading vibrating screen is arranged obliquely, and the oblique angle is less than 20 degrees. The upper and lower grading vibrating screens are arranged opposite to each other, and the screening aggregate box is arranged on the lower oblique side of the grading vibrating screen.

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