A screening deduster for granular silicon production
By utilizing gravity and centrifugal force combined with nitrogen-assisted blowing and negative pressure extraction, the problem of easy damage to the screen plates of traditional screening machines has been solved, achieving efficient screening and dust removal, and reducing maintenance and operating costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- INNER MONGOLIA XINHUAN SILICON ENERGY TECH CO LTD
- Filing Date
- 2025-08-05
- Publication Date
- 2026-05-26
AI Technical Summary
In traditional particle silicon screening processes, the sieve plates are easily damaged, resulting in high maintenance and operating costs, and it is difficult to efficiently remove small particles and dust.
The system combines gravity and centrifugal force, using nitrogen-assisted blowing and negative pressure extraction for screening and dust removal, reducing reliance on electrical equipment and using polyurethane casting to reduce the frequency of disassembly and inspection.
It reduces equipment maintenance and operating costs, improves the removal efficiency of small particles and dust, and extends the service life of the equipment.
Smart Images
Figure CN224272200U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a screening and dust removal machine, and more particularly to a screening and dust removal machine used in the production of granular silicon. Background Technology
[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.
[0003] Post-processing is a crucial step before packaging and selling granular silicon products. After post-processing, the granular silicon undergoes screening and dust removal before being packaged and sold. In the traditional screening process, electric machinery is used to vibrate the screening machine, causing the granular silicon to bounce up and down inside the machine to remove small particles. This method requires frequent disassembly and inspection, and the screen plates are easily damaged, resulting in high maintenance and operating costs.
[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content
[0005] Purpose of the invention: The technical problem to be solved by this utility model is to provide a screening and dust removal machine for the production of granular silicon, addressing the shortcomings of the existing technology.
[0006] To solve the above-mentioned technical problems, this utility model discloses a screening and dust removal machine for granular silicon production, comprising:
[0007] A hollow cylindrical shell, the top of which is closed, with a product inlet at its edge, and a bottom discharge plate fixed at the bottom of which is a downwardly protruding conical surface with a discharge port at its center;
[0008] Below the product inlet inside the housing, an accelerated dust removal device for removing material dust is fixedly installed; below the accelerated dust removal device, a centrifugal screening device for screening materials is fixedly installed.
[0009] Furthermore, the accelerated dust removal device includes:
[0010] The spiral coil is arranged downwards, with its inlet end located below the product feed port. A nitrogen blowing port is provided on the side wall of the housing at the corresponding position of the inlet end of the coil. A baffle plate is fixed below the coil, with an opening in the middle for outputting the dust-removed material.
[0011] Furthermore, the baffle plate has a downwardly protruding conical structure.
[0012] Furthermore, the sidewall of the housing, located opposite the nitrogen blowing port, has a negative pressure port for drawing negative pressure.
[0013] Furthermore, the centrifugal screening device utilizes the centrifugal force of the material to screen the material size.
[0014] Furthermore, the centrifugal sieving device includes:
[0015] A spiral blade support frame is fixed on the bottom discharge tray. A spiral blade is installed on the spiral blade support frame. The spiral blade is a downward spiral blade. A blade extension is fixed at the bottom end of the spiral blade. The blade extension extends to the outside of the housing. A small particle discharge port is fixed at the end of the blade extension away from the spiral blade.
[0016] Furthermore, the helical blade support frame includes:
[0017] A bottom support bracket is fixed on the bottom discharge tray, and a support column is fixed on the top of the bottom support bracket. The support column passes through the central shaft of the spiral blade.
[0018] Furthermore, a number of support legs for supporting the housing are fixedly provided on the lower part of the outer side wall of the housing.
[0019] Furthermore, the outer wall of the housing is also provided with a flange surface for mounting and fixing the screening and dust removal machine.
[0020] Furthermore, the inner wall of the housing is also fixed with a clean casting layer or inner lining layer to reduce dust adhesion.
[0021] Beneficial effects:
[0022] This invention reduces maintenance and operating costs, enables more efficient removal of small particles and dust, and shortens the equipment disassembly and inspection cycle. Attached Figure Description
[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.
[0024] Figure 1 This is a cross-sectional view of a screening and dust removal machine.
[0025] Figure 2 This is a top view of the helical blade support frame.
[0026] In the diagram, 1 is the product inlet; 2 is the spiral blade support frame; 201 is the support column; 202 is the bottom support bracket; 3 is the coil; 4 is the negative pressure port; 5 is the flange face; 6 is the spiral blade; 61 is the blade extension; 7 is the clean casting layer or inner lining layer; 8 is the small particle discharge port; 9 is the support leg; 10 is the bottom discharge plate; 11 is the discharge port; 12 is the nitrogen blowing port; 13 is the baffle plate; and 14 is the shell. Detailed Implementation
[0027] The overall concept of this utility model is to change the traditional method by using gravity and centrifugal force to remove small particles from the granular silicon during sieving. Simultaneously, nitrogen gas and negative pressure vacuum are introduced to accelerate the product and remove silicon powder from the granular silicon. This achieves the goals of reducing maintenance and operating costs, more efficiently removing small particles and dust, and improving the product's market competitiveness. Specifically, this utility model adopts the following approach:
[0028] 1. Use gravity and centrifugal force to remove small particles.
[0029] 2. A nitrogen inlet and a vacuum outlet are provided to achieve the purpose of dust removal.
[0030] 3. Cutting is performed using only gravity and centrifugal force, without the use of electricity.
[0031] 4. Use polyurethane casting to reduce the disassembly and inspection cycle.
[0032] 5. Use nitrogen to assist blowing, giving the product acceleration.
[0033] The specific technical solution of this utility model is as follows: Figure 1 As shown, a screening and dust removal machine for granular silicon production includes:
[0034] The hollow cylindrical shell 14 is closed at the top and has a product inlet 1 at the top edge for the material to be screened and dusted to enter. A bottom discharge plate 10 is fixed at the bottom of the shell 14. The bottom discharge plate 10 is a downwardly protruding conical surface and has a discharge port 11 at the center for discharging the material on the bottom discharge plate 10.
[0035] Several legs 9 for supporting the housing 14 are also fixed to the lower part of the outer side wall.
[0036] An accelerated dust removal device is provided below the product inlet 1 inside the housing 14 to remove dust from the material entering the product inlet 1.
[0037] The dust removal acceleration device includes:
[0038] A spiral coil 3, spiraling downwards, has its inlet end positioned below the product feed inlet 1. A nitrogen-assisted blowing port 12 is fixedly installed on the side wall of the housing 14 at the corresponding position. This port injects nitrogen into the coil 3, accelerating the material's movement and achieving dust removal. A baffle plate 13 is fixedly installed below the coil 3. The baffle plate 13 is a downwardly protruding conical surface with an opening in the middle. Material falling from the coil 3 enters this opening.
[0039] The side wall of the housing 14 is located opposite the nitrogen blowing port 12 and has a negative pressure port 4 for drawing negative pressure to extract dust.
[0040] Below the dust removal device, there is a centrifugal screening device that uses centrifugal force to screen the material by size.
[0041] Centrifugal sieving device, including:
[0042] The spiral blade support frame 2, fixed on the bottom discharge tray 10, is used to install the spiral blades 6. The spiral blades 6 are downward spiral blades. When the material spirals down along the blades, the centrifugal force is different due to the different masses. The material with the larger mass slides out of the spiral blades and falls onto the bottom discharge tray 10.
[0043] The bottom end of the spiral blade 6 is fixed with a blade extension 61, which extends to the outside of the shell 14. A small particle discharge port 8 is fixed below the outer end of the blade extension 61 for outputting the screened small particle material.
[0044] like Figure 2 As shown, the spiral blade support frame 2 includes: a bottom support bracket 202 fixed on the bottom discharge plate 10, a support column 201 fixed on the top of the bottom support bracket 202, and the support column 201 passing through the central axis of the spiral blade 6; there can be multiple bottom support brackets 202, which play a stabilizing role.
[0045] A flange face 5 is also fixed on the outside of the housing 14 for installing this screening and dust removal machine on other devices.
[0046] The inner wall of the housing 14 is also fixed with a clean casting layer or inner lining layer 7 to reduce dust adhesion.
[0047] During operation, granular silicon enters the feed inlet 1 and is accelerated by nitrogen injected through the nitrogen-assisted blowing port 12. It then accelerates within the coil 3 and falls onto the baffle plate 13. During rotation, some silicon powder detaches. Under the influence of gravity and centrifugal force, the granular silicon rotates and falls onto the spiral blades 6. Under centrifugal force, larger particles rotate out of the spiral blades 6 and fall onto the bottom discharge plate 10 of the screening and dust removal machine. Upon falling onto the discharge plate 10, silicon powder on the surface of the granular silicon detaches due to impact. Accompanied by nitrogen, under the negative pressure created by the negative pressure port 4, it enters the negative pressure pipe, thus achieving dust removal. The granular silicon enters the discharge port 11 and then the downstream product tank. Smaller particles remain on the spiral blades 6 until they rotate out of the dust removal screening machine and enter the small particle discharge port 8, achieving the separation of large and small particles.
[0048] This utility model provides a concept and method for a screening and dust removal machine used in the production of granular silicon. There are many methods and approaches to implement this technical solution; the above description is only a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. All components not explicitly stated in this embodiment can be implemented using existing technology.
Claims
1. A screening and dust removal machine for granular silicon production, characterized in that, include: A hollow cylindrical shell (14) is closed at the top and has a product inlet (1) at its edge. A bottom discharge plate (10) is fixed at the bottom of the shell (14). The bottom discharge plate (10) is a downwardly protruding conical surface and has a discharge port (11) at its center. Below the product inlet (1) inside the housing (14), an accelerated dust removal device for removing material dust is fixedly provided; below the accelerated dust removal device, a centrifugal screening device for screening materials is fixedly provided.
2. The screening and dust removal machine for granular silicon production according to claim 1, characterized in that, The accelerated dust removal device includes: A spiral coil (3) is arranged downwards. The inlet end of the coil (3) is located below the product feed port (1). A nitrogen blowing port (12) is opened on the side wall of the housing (14) at the corresponding position of the inlet end of the coil (3). A baffle plate (13) is fixed below the coil (3). The baffle plate (13) has an opening in the middle for outputting the dust-removed material.
3. A screening and dust removal machine for granular silicon production according to claim 2, characterized in that, The baffle plate (13) is a downwardly protruding conical structure.
4. A screening and dust removal machine for granular silicon production according to claim 2, characterized in that, The side wall of the housing (14) is located opposite the nitrogen blowing port (12) and has a negative pressure port (4) for drawing negative pressure.
5. A screening and dust removal machine for granular silicon production according to claim 1, characterized in that, The centrifugal screening device uses the centrifugal force of the material to screen the size of the material.
6. A screening and dust removal machine for granular silicon production according to claim 5, characterized in that, The centrifugal sieving device includes: A spiral blade support frame (2) is fixed on the bottom feed tray (10). A spiral blade (6) is installed on the spiral blade support frame (2). The spiral blade (6) is a downward spiral blade. A blade extension (61) is fixed at the bottom end of the spiral blade (6). The blade extension (61) extends to the outside of the housing (14). A small particle discharge port (8) is fixed at the end of the blade extension (61) away from the spiral blade (6).
7. A screening and dust removal machine for granular silicon production according to claim 6, characterized in that, The helical blade support frame (2) includes: A bottom support bracket (202) is fixed on the bottom discharge tray (10), and a support column (201) is fixed on the top of the bottom support bracket (202). The support column (201) passes through the central axis of the spiral blade (6).
8. A screening and dust removal machine for granular silicon production according to any one of claims 1-7, characterized in that, The lower part of the outer side wall of the housing (14) is fixed with a plurality of legs (9) for supporting the housing (14).
9. A screening and dust removal machine for granular silicon production according to any one of claims 1-7, characterized in that, The outer wall of the housing (14) is also fixed with a flange face (5) for installing and fixing the screening dust collector.
10. A screening and dust removal machine for granular silicon production according to any one of claims 1-7, characterized in that, The inner wall of the housing (14) is also fixed with a clean casting layer or inner lining layer (7) for reducing dust adhesion.