Granular silicon production system for recovering, selecting and grinding falling materials

Abstract

The utility model provides a granular silicon production system for recovering, selecting and grinding falling materials, which comprises a recovered material moving tank for storing the falling materials, and a product sieve for primary sieving, a discharging port of the product screen is connected with a feeding port of light impurity removing and dust blowing equipment used for removing light impurities, a discharging port of the light impurity removing and dust blowing equipment is connected with a feeding port of a temporary storage tank, and a discharging port of the temporary storage tank is connected with a feeding port of a magnetism removing machine used for removing magnetic impurities. A non-magnetic material discharge port, for outputting non-magnetic materials, of the demagnetizer is connected with a feed port of the screening machine for screening the materials, a discharge port, for outputting large-particle materials, of the screening machine is connected with a feed port of the grinding raw material tank, and a small-particle discharge port, for outputting small-particle materials, of the screening machine is connected with the sundry collecting tank; a discharge port of the grinding raw material tank is connected with a feed port of a grinding machine for grinding materials, and a discharge port of the grinding machine is connected with a silicon powder tank.

Description

Technical Field

[0001] This utility model relates to a granular silicon production system, and more particularly to a granular silicon production system for recycling, refining, and grinding waste materials. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] In the production of granular polycrystalline silicon using the silane fluidized bed method, some waste material is generated during maintenance. This waste material may contain PE, straw, sand, magnetic materials, or other dust, making it unsellable and unprocessable.

[0004] There is a lack of existing technologies that can recycle and reuse the waste materials to reduce product production losses.

[0005] 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

[0006] Purpose of the invention: The technical problem to be solved by this utility model is to provide a particle silicon production system for recycling, refining and grinding waste materials, addressing the shortcomings of existing technologies.

[0007] To address the aforementioned technical problems, this utility model discloses a particulate silicon production system for the recycling, refining, and grinding of waste materials, comprising:

[0008] A mobile recycling tank for storing the spilled material has its outlet connected to the inlet of a product sieve used for initial screening. The product sieve's outlet is connected to the inlet of a light impurity removal dust blower for removing light impurities. The light impurity removal dust blower's outlet is connected to the inlet of a temporary storage tank. The temporary storage tank's outlet is connected to the inlet of a demagnetizer for removing magnetic impurities. The demagnetizer's outlet for non-magnetic material is connected to the inlet of a screening machine for sizing materials. The screening machine's outlet for large particles is connected to the inlet of a grinding raw material tank, and its outlet for small particles is connected to a waste material collection tank. The grinding raw material tank's outlet is connected to the inlet of a grinding mill for grinding materials, and the grinding mill's outlet is connected to a silicon powder tank.

[0009] Furthermore, the lightweight dust removal and blowing device includes:

[0010] The tank has a hollow container, with a light dust removal and cleaning device inlet at the top and a downward-sloping bottom plate at the bottom. The bottom of the bottom plate has a light dust removal and cleaning device outlet. Nitrogen purging port and negative pressure pipe port are respectively provided on both sides of the tank to provide purging nitrogen and negative pressure, respectively.

[0011] Furthermore, the demagnetizer includes:

[0012] There are two discharge ports: one for non-magnetic materials and one for magnetic impurities. The magnetic impurity discharge port is connected to a collection box for storing magnetic impurities, while the non-magnetic material discharge port is connected to the product inlet of the screening machine.

[0013] Furthermore, the screening machine includes:

[0014] 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;

[0015] 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.

[0016] Furthermore, the accelerated dust removal device includes:

[0017] 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.

[0018] Furthermore, the baffle plate has a downwardly protruding conical structure.

[0019] Furthermore, the sidewall of the housing, located opposite the nitrogen blowing port, has a negative pressure port for drawing negative pressure.

[0020] Furthermore, the centrifugal screening device utilizes the centrifugal force of the material to screen the material size.

[0021] Furthermore, the centrifugal sieving device includes:

[0022] 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.

[0023] 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;

[0024] The outer wall of the housing is also fixed with a flange for mounting and fixing the screening and dust removal machine;

[0025] The inner wall of the housing is also fixed with a clean casting layer or inner lining layer to reduce dust adhesion.

[0026] Beneficial effects:

[0027] This invention recycles and centrally processes some of the waste materials, then selects and grinds them to supply silicon powder as raw material for hydrogenation, thereby reducing product production losses. Attached Figure Description

[0028] 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.

[0029] Figure 1 This is a schematic diagram of the overall architecture of this utility model.

[0030] Figure 2 This is a schematic diagram of a lightweight dust removal and blowing device.

[0031] Figure 3 This is a schematic diagram of the screening machine.

[0032] In the diagram, 1 is the mobile recycling tank; 2 is the product screen; 3 is the lightweight impurity removal and dust blowing equipment; 301 is the nitrogen purging port; 302 is the negative pressure pipeline port; 303 is the discharge port of the lightweight impurity removal and dust blowing equipment; 304 is the feed port of the lightweight impurity removal and dust blowing equipment; 305 is the base plate of the lightweight impurity removal and dust blowing equipment; 4 is the temporary storage tank; 5 is the demagnetizer; 6 is the magnetic material collection box; 7 is the screening machine; 8 is the impurity collection tank; 9 is the grinding raw material tank; and 10 is the grinder. 11 is the silicon powder storage tank; 701 is the product inlet; 702 is the spiral blade support frame; 703 is the coil; 704 is the negative pressure port; 705 is the flange face; 706 is the spiral blade; 761 is the blade extension; 707 is the clean casting layer or inner lining layer; 708 is the small particle discharge port; 709 is the support leg; 710 is the bottom discharge plate; 711 is the discharge port; 712 is the nitrogen blowing port; 713 is the baffle plate; 714 is the shell. Detailed Implementation

[0033] The overall concept of this utility model is as follows:

[0034] 1. The waste material is screened by a product sieve to filter out large impurities;

[0035] 2. Lightweight dust removal equipment removes impurities such as PE and straw from the fallen material;

[0036] 3. The demagnetizer removes magnetic materials from the fallen material;

[0037] 4. The screening machine removes sand and gravel from the fallen material;

[0038] 5. The grinding mill grinds the selected waste material into silicon powder;

[0039] 6. Silicon powder is added to the hydrogenation process for use.

[0040] This utility model proposes a particle silicon production system for the recycling, refining, and grinding of waste materials, such as... Figure 1 As shown, it includes:

[0041] The recycling tank 1 is used to store the recycled material that has fallen to the ground. The outlet of the recycling tank 1 is connected to the inlet of the product screen 2, which is used to initially remove impurities from the material.

[0042] The discharge port of the product screen 2 is connected to the inlet 304 of the lightweight impurity removal and dust blowing device 3, which is used to blow away lightweight impurities on the material.

[0043] like Figure 2 As shown, the lightweight dust removal and blowing device 3 specifically includes:

[0044] The hollow tank has a light dust removal and cleaning equipment inlet 304 at the top and a downward-sloping light dust removal and cleaning equipment base plate 305 at the bottom. The bottom of the base plate 305 has an outlet 303. A purging nitrogen port 301 and a negative pressure pipeline port 302 are respectively located on both sides of the tank and are used to provide purging nitrogen and negative pressure respectively.

[0045] The discharge port 303 of the lightweight dust removal and cleaning equipment 3 is connected to the inlet of the temporary storage tank 4, which is used to temporarily store materials.

[0046] The outlet of the temporary storage tank 4 is connected to the inlet of the demagnetizer 5, which is used to remove magnetic impurities from the material.

[0047] The demagnetizer 5 has two discharge ports: a non-magnetic material discharge port and a magnetic impurity discharge port. The magnetic impurity discharge port is connected to the collection box 6 for storing magnetic impurities, while the non-magnetic material discharge port is connected to the product inlet 701 of the screening machine 7 for subsequent processing.

[0048] like Figure 3 As shown, the screening machine 7 screens materials. Large particles are discharged from the discharge port 711, and small particles are discharged from the small particle discharge port 708. Specifically, it includes:

[0049] The hollow cylindrical shell 714 is closed at the top and has a product inlet 701 at the top edge for the material to be screened and dusted. A bottom discharge plate 710 is fixed at the bottom of the shell 714. The bottom discharge plate 710 is a downwardly protruding conical surface and has a discharge port 711 at the center for discharging the material on the bottom discharge plate 710.

[0050] The lower part of the outer side wall of the housing 714 is also fixed with several legs 709 for supporting the housing 714.

[0051] An accelerated dust removal device is provided below the product inlet 701 inside the housing 714 to remove dust from the material entering the product inlet 701.

[0052] The dust removal acceleration device includes:

[0053] A spiral coil 703 is positioned downwards, with its inlet end located below the product feed inlet 701. A nitrogen-assisted blowing port 712 is fixedly installed on the side wall of the housing 714 at the corresponding position. This port injects nitrogen into the coil 703, accelerating the material's movement and achieving dust removal. A baffle plate 713 is fixedly installed below the coil 703. The baffle plate 713 is a downwardly protruding conical surface with an opening in the middle. Material falling from the coil 703 enters this opening.

[0054] The side wall of the housing 714 is located opposite the nitrogen blowing port 712 and has a negative pressure port 704 for drawing negative pressure to extract dust.

[0055] Below the dust removal device, there is a centrifugal screening device that uses centrifugal force to screen the material by size.

[0056] Centrifugal sieving device, including:

[0057] The spiral blade support frame 702, fixed on the bottom discharge tray 710, is used to install the spiral blade 706. The spiral blade 706 is a downward spiral blade. When the material spirals down along the blade, the centrifugal force is different due to the different mass. The material with the larger mass slides out of the spiral blade and falls onto the bottom discharge tray 710.

[0058] The bottom end of the spiral blade 706 is fixed with a blade extension 761, which extends to the outside of the shell 14. A small particle discharge port 708 is fixed below the outer end of the blade extension 706 for outputting the screened small particle material.

[0059] A flange face 705 is also fixed on the outside of the housing 714 for mounting this screening and dust removal machine on other devices.

[0060] The inner wall of the housing 714 is also fixed with a clean casting layer or inner lining layer 707 to reduce dust adhesion.

[0061] The small particle discharge port 708 of the screening machine 7 is connected to the inlet of the waste material collection tank 8 for storing small particle materials; the discharge port 711 is connected to the inlet of the grinding raw material tank 9 for storing large particle materials.

[0062] The discharge port of the grinding raw material tank 9 is connected to the feed port of the grinding machine 10, and the grinding process is carried out in the grinding machine 10.

[0063] The discharge port of the grinder 10 is connected to the silicon powder tank 11, which is used to store silicon powder.

[0064] During use, the fallen material is collected into the mobile tank 1. It then passes through the product screen 2 to intercept impurities with a particle size >6mm. These impurities are removed through disassembly and inspection. The fallen material after passing through the product screen 2 enters the lightweight impurity removal and dust blowing equipment 3. Purge nitrogen gas input through the purging nitrogen port 301 blows up lightweight impurities, PE, straw, etc. The lightweight impurities are drawn into the dust removal pipeline by the negative pressure of the negative pressure pipe port 302. The fallen material after lightweight impurity removal enters the temporary storage tank 4. The fallen material in the temporary storage tank then enters the demagnetizer 5. After demagnetization, the fallen material enters the screening machine 7. Magnetic materials... The material enters the collection box 6 and the screening machine 7. Under the action of nitrogen blowing, the fallen material is accelerated and blown out of the coil. The accelerated granular silicon and sand enter the spiral blades. Since the granular silicon is spherical and the sand is square, under the action of centrifugal force, the large granular silicon particles are thrown out of the spiral blades and enter the grinding raw material tank 9, while the small granular silicon particles enter the miscellaneous material tank 8 along the inside of the spiral blades. The fallen material entering the grinding raw material tank 9 is ground by the grinder 10 and enters the silicon powder tank 11. Finally, the silicon powder in the silicon powder tank 11 is sent to the subsequent hydrogenation process for feeding.

[0065] This utility model provides a concept and method for a particle silicon production system for the recycling, refining, and grinding of waste materials. Many methods and approaches exist for implementing this technical solution; the above description is merely 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 principles 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 particulate silicon production system for the recycling, refining, and grinding of waste materials, characterized in that, include: A mobile recycling tank (1) for storing the fallen material is provided, the outlet of which is connected to the inlet of a product sieve (2) for initial screening; the outlet of the product sieve (2) is connected to the inlet of a light dust removal device (3) for removing light impurities, the outlet of the light dust removal device (3) is connected to the inlet of a temporary storage tank (4), and the outlet of the temporary storage tank (4) is connected to the inlet of a demagnetizer (5) for removing magnetic impurities; the demagnetizer (5) The non-magnetic material outlet for outputting non-magnetic materials is connected to the inlet of the screening machine (7) used for screening material size. The discharge port (711) of the screening machine (7) for outputting large particles is connected to the inlet of the grinding raw material tank (9), and the small particle discharge port (708) for outputting small particles is connected to the miscellaneous material collection tank (8). The discharge port of the grinding raw material tank (9) is connected to the inlet of the grinding mill (10) used for grinding materials, and the discharge port of the grinding mill (10) is connected to the silicon powder tank (11).

2. The particulate silicon production system for recycling, refining, and grinding waste materials according to claim 1, characterized in that, The lightweight dust removal and blowing device (3) includes: The tank has a hollow container, with a light dust removal inlet (304) at the top and a downward-sloping bottom plate (305) at the bottom. The bottom plate (305) has a light dust removal outlet (303) at its bottom end. The tank has a nitrogen purging port (301) and a negative pressure pipeline port (302) on its two sides, which are used to provide nitrogen purging and negative pressure, respectively.

3. The particulate silicon production system for recycling, refining, and grinding waste materials according to claim 1, characterized in that, The demagnetizer (5) includes: There are two discharge ports, namely a non-magnetic material discharge port and a magnetic impurity discharge port; the magnetic impurity discharge port is connected to the collection box (6) for storing magnetic impurities, and the non-magnetic material discharge port is connected to the product inlet (701) of the screening machine (7).

4. A particulate silicon production system for recycling, refining, and grinding waste materials according to claim 1, characterized in that, The screening machine (7) includes: A hollow cylindrical shell (714) is closed at the top and has a product inlet (701) at its edge. A bottom discharge plate (710) is fixed at the bottom of the shell (714). The bottom discharge plate (710) is a downwardly protruding conical surface and has a discharge port (711) at its center. Below the product inlet (701) inside the housing (714), 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.

5. A particulate silicon production system for recycling, refining, and grinding waste materials according to claim 4, characterized in that, The accelerated dust removal device includes: A spiral coil (703) is arranged downwards. The inlet end of the coil (703) is located below the product feed port (701). A nitrogen blowing port (712) is opened on the side wall of the housing (714) at the position corresponding to the inlet end of the coil (703). A baffle plate (713) is fixed below the coil (703). The baffle plate (713) has an opening in the middle for outputting the dust-removed material.

6. A particulate silicon production system for recycling, refining, and grinding waste materials according to claim 5, characterized in that, The baffle plate (713) has a downwardly protruding conical structure.

7. A particulate silicon production system for recycling, refining, and grinding waste materials according to claim 6, characterized in that, The side wall of the housing (714) is located opposite the nitrogen blowing port (712) and has a negative pressure port (704) for drawing negative pressure.

8. A particulate silicon production system for recycling, refining, and grinding waste materials according to claim 7, characterized in that, The centrifugal screening device uses the centrifugal force of the material to screen the size of the material.

9. A particulate silicon production system for recycling, refining, and grinding waste materials according to claim 8, characterized in that, The centrifugal sieving device includes: A spiral blade support frame (702) is fixed on the bottom discharge tray (710). A spiral blade (706) is installed on the spiral blade support frame (702). The spiral blade (706) is a downward spiral blade. A blade extension (761) is fixed at the bottom end of the spiral blade (706). The blade extension (761) extends to the outside of the housing (714). A small particle discharge port (708) is fixed at the end of the blade extension (761) away from the spiral blade (706).

10. A particulate silicon production system for recycling, refining, and grinding waste materials according to claim 9, characterized in that, The lower part of the outer side wall of the housing (714) is fixed with a plurality of legs (709) for supporting the housing (714); The outer side wall of the housing (714) is also fixed with a flange face (705) for installing and fixing the screening dust collector; The inner wall of the housing (714) is also fixed with a clean casting layer or inner lining layer (707) for reducing dust adhesion.

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