Device for removing dust on surface of silicon powder

Abstract

The utility model discloses a device for removing dust on the surface of silicon powder. The device comprises a main body, a silicon powder feeding pipe, a dispersing component, a purging gas inlet pipe and a negative pressure gas collecting pipe. A hollow cavity is formed in the main body, and a silicon powder outlet is formed in the bottom end of the cavity; a discharging opening of the silicon powder feeding pipe extends into the cavity from the top of the cavity; the dispersing component is arranged in the cavity and corresponds to a discharge hole of the silicon powder feeding pipe; a gas outlet of the purging gas inlet pipe is positioned below the dispersing component and is communicated with the cavity; and an air inlet of the negative pressure air collecting pipe is communicated with the cavity and is higher than a discharge hole of the silicon powder feeding pipe. The device disclosed by the utility model can be used for efficiently removing fine dust on the surface of the silicon powder in an energy-saving manner.

Description

Technical Field

[0001] This utility model relates to a device for removing dust from the surface of silicon powder. Background Technology

[0002] During the silicon powder production process, fine silicon dust often adheres to the surface of the product. This dust not only affects the final quality of the product, but also causes pollution problems during subsequent processing, storage and transportation.

[0003] Traditional dust removal methods, such as filtration, can remove most dust to a certain extent. However, these methods are less effective at removing fine dust particles from the surface of silicon powder.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] Purpose of the utility model: The technical problem to be solved by this utility model is to address the shortcomings of the existing technology by providing a device for removing dust from the surface of silicon powder, which can efficiently and energy-savingly remove fine dust from the surface of silicon powder.

[0006] To address the aforementioned technical problems, this utility model discloses a device for removing dust from the surface of silicon powder, comprising a main body, a silicon powder feed pipe, a dispersing component, a purge gas inlet pipe, and a negative pressure gas collecting pipe. The main body has a hollow chamber inside, with a silicon powder outlet at the bottom. The outlet of the silicon powder feed pipe extends into the chamber from the top. The dispersing component is disposed within the chamber and corresponds to the outlet of the silicon powder feed pipe. The outlet of the purge gas inlet pipe is located below the dispersing component and communicates with the chamber. The inlet of the negative pressure gas collecting pipe communicates with the chamber and is higher than the outlet of the silicon powder feed pipe.

[0007] In use, the dust-laden silicon powder falls from the outlet of the silicon powder feed pipe to the top of the dispersing component located in the chamber, where it is dispersed by the dispersing component, causing the dust to rise. The risen dust is drawn away by the negative pressure gas collection pipe; as the dispersed silicon powder falls, purge air enters the chamber through the outlet of the purge air inlet pipe, performing secondary dust removal on the dust adhering to the surface of the silicon powder, thereby achieving the purpose of efficiently and energy-saving removal of fine dust from the surface of the silicon powder.

[0008] Specifically, the dispersing component is bullet-shaped, with its head facing the outlet of the silicon powder feed pipe.

[0009] Specifically, the dispersing component is made of a magnetic material.

[0010] Specifically, the chamber includes a dust collection section, a separation section, and an air inlet section from top to bottom; the separation section connects the dust collection section and the air inlet section; the air inlet of the negative pressure air collection pipe is located on the side wall of the dust collection section; and the air outlet of the purging air inlet pipe is located on the side wall of the air inlet section.

[0011] Specifically, the air intake section includes a first cylindrical section, an intermediate conical section, and a second cylindrical section, and the separation section, the first cylindrical section, the intermediate conical section, and the second cylindrical section are connected in sequence; the inner diameter of the first cylindrical section is larger than the inner diameter of the second cylindrical section; the outlet of the purge air intake pipe is located on the side wall of the second cylindrical section.

[0012] Specifically, both the separation section and the dust collection section are cylindrical, and their inner diameters are the same as those of the first cylindrical section.

[0013] Specifically, the silicon powder outlet is located at the end of the second cylindrical section away from the intermediate conical section.

[0014] Specifically, a flow-dispersing plate is also provided on the side wall of the separation section, and the flow-dispersing plate is spaced apart from the outer periphery of the dispersing component.

[0015] Specifically, the purge gas inlet pipe is connected to the purge gas purging device.

[0016] Specifically, the purging gas is nitrogen.

[0017] Beneficial effects:

[0018] 1. In this device, dust-laden silicon powder falls from the outlet of the silicon powder feed pipe to the top of the dispersing component located in the chamber, where it is dispersed by the dispersing component, causing the dust to rise. The risen dust is drawn away by the negative pressure collection pipe; during the falling of the dispersed silicon powder, purge air is introduced into the chamber through the outlet of the purge air inlet pipe to perform secondary dust removal on the dust attached to the surface of the silicon powder, and then the fine dust is drawn away by negative pressure, thereby achieving the purpose of efficiently and energy-savingly removing fine dust from the surface of silicon powder.

[0019] 2. When the dispersing component of this device is made of magnetic material, the device of this application can also demagnetize, thereby further improving the purity of the silicon powder product.

[0020] 3. This device mainly relies on the automatic falling of objects for dust removal, which meets the requirements of green production; it is suitable for the treatment of silicon powder of various types and particle sizes and has broad application prospects; the collected dust is easy to recycle and reuse, reducing resource waste and environmental burden. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a front sectional view of a device for removing dust from the surface of silicon powder, provided by this utility model.

[0023] The accompanying figure labels are explained as follows:

[0024] 1. Main body; 2. Silicon powder feed pipe; 21. Discharge port; 3. Dispersion component; 4. Purge gas inlet pipe; 5. Negative pressure gas collection pipe; 51. Air inlet; 11. Chamber; 12. Silicon powder outlet; 111. Dust collection section; 112. Separation section; 113. Air inlet section; 1131. First cylindrical section; 1132. Intermediate conical section; 1133. Second cylindrical section; 6. Baffle dispersion plate. Detailed Implementation

[0025] This invention provides a device for removing dust from the surface of silicon powder, comprising a main body 1, a silicon powder feed pipe 2, a dispersing component 3, a purge air inlet pipe 4, and a negative pressure gas collecting pipe 5. The main body 1 has a hollow chamber 11 inside, with a silicon powder outlet 12 at the bottom. The outlet 21 of the silicon powder feed pipe 2 extends into the chamber 11 from the top. The dispersing component 3 is disposed in the chamber 11 and corresponds to the outlet 21 of the silicon powder feed pipe 2. The outlet 41 of the purge air inlet pipe 4 is located below the dispersing component 3 and communicates with the chamber 11. The inlet 51 of the negative pressure gas collecting pipe 5 communicates with the chamber 11 and is higher than the outlet 21 of the silicon powder feed pipe 2.

[0026] In use, the dust-laden silicon powder falls from the outlet 21 of the silicon powder feed pipe 2 to the top of the dispersing component 3 located in the chamber 11, where it is dispersed by the dispersing component 3, causing the dust to rise. The risen dust is then drawn away by the negative pressure collection pipe 5. As the dispersed silicon powder falls, purge air is introduced into the chamber 11 through the outlet 41 of the purge air inlet pipe 4 to perform secondary dust removal on the surface of the silicon powder.

[0027] It is understandable that by precisely controlling parameters such as the gas flow rate of the purging gas, the feeding speed of the dust-containing silicon powder, and the negative pressure of the negative pressure collection pipe, the device can achieve stable and efficient dust removal.

[0028] Specifically, the dispersing component 3 is bullet-shaped, with its head facing the outlet 21 of the silicon powder feed pipe 2.

[0029] Specifically, the dispersing component 3 is made of magnet material.

[0030] In this embodiment, by making the dispersing component 3 a magnetic material, it can not only remove dust but also demagnetize. Specifically, during the descent, magnetic materials will adhere to the dispersing component 3. It can be periodically removed to clean the magnetic materials on the dispersing component 3.

[0031] Specifically, chamber 11 includes, from top to bottom, a dust collection section 111, a separation section 112, and an air inlet section 113. The separation section 112 connects the dust collection section 111 and the air inlet section 113. The air inlet 51 of the negative pressure air collection pipe 5 is located on the side wall of the dust collection section 111. The air outlet 41 of the purge air inlet pipe 4 is located on the side wall of the air inlet section 113.

[0032] Specifically, the intake section 113 includes a first cylindrical section 1131, an intermediate conical section 1132, and a second cylindrical section 1133. The separation section 112, the first cylindrical section 1131, the intermediate conical section 1132, and the second cylindrical section 1133 are sequentially connected. The inner diameter of the first cylindrical section 1131 is larger than the inner diameter of the second cylindrical section 1133. The outlet 41 of the purge air intake pipe 4 is located on the side wall of the second cylindrical section 1133.

[0033] Specifically, both the separation section 112 and the dust collection section 111 are cylindrical, and their inner diameters are the same as those of the first cylindrical section 1131.

[0034] Specifically, the silicon powder outlet 12 is located at the end of the second cylindrical section 1133 away from the middle conical section 1132.

[0035] Specifically, a flow-dispersing plate 6 is also provided on the side wall of the separation section 112, and the flow-dispersing plate 6 is spaced apart from the outer periphery of the dispersing component 3.

[0036] The function of the baffle plate 6 is to reduce the falling speed of the material and increase the amount of nitrogen gas blown from bottom to top.

[0037] Specifically, the purge gas inlet pipe 4 is connected to the purge gas purging device.

[0038] Specifically, the purging gas is nitrogen.

[0039] Preferably, to prevent metallic foreign objects from affecting the quality of silicon powder products, the chamber 11, the purge gas inlet pipe 4, and the negative pressure gas collection pipe 5 are lined with non-metallic materials to avoid the introduction of impurities into the system.

[0040] Preferably, the outlet of the negative pressure gas collection pipe 5 can be connected to a dust recovery device to recover and reuse the collected dust, thereby reducing environmental pollution.

[0041] This utility model provides a concept and method for removing dust from the surface of silicon powder. 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 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. An apparatus for removing surface dust from silicon powder, characterized by comprising: The utility model relates to a kind of silicon powder dispersing device, including: Main body (1), the hollow chamber (11) is provided inside the main body (1), the bottom end of the chamber (11) is provided with silicon powder outlet (12); Silicon powder feeding pipe (2), the discharge port (21) of the silicon powder feeding pipe (2) is from the top of the chamber (11) and into the chamber (11); Dispersion component (3), the dispersion component (3) is set in the chamber (11) and is set with the discharge port (21) of the silicon powder feeding pipe (2); Sweep gas inlet pipe (4), the gas outlet (41) of the sweep gas inlet pipe (4) is below the dispersion component (3) and is communicated with the chamber (11); And negative pressure gas collector (5), the gas inlet (51) of the negative pressure gas collector (5) is communicated with the chamber (11) and is higher than the discharge port (21) of the silicon powder feeding pipe (2).

2. The device for removing surface dust of silicon powder according to claim 1, wherein The dispersion component (3) is bullet head body shape, and the head end is arranged towards the discharge port (21) of the silicon powder feeding pipe (2).

3. The device for removing surface dust of silicon powder according to claim 2, wherein The dispersion component (3) is magnetic material.

4. The device for removing surface dust of silicon powder according to claim 1, wherein The chamber (11) includes dust collection section (111), separation section (112) and intake section (113) from top to bottom;The separation section (112) is communicated with the dust collection section (111) and the intake section (113);The gas inlet (51) of the negative pressure gas collector (5) is arranged on the side wall of the dust collection section (111);The gas outlet (41) of the sweep gas inlet pipe (4) is arranged on the side wall of the intake section (113).

5. The device for removing surface dust of silicon powder according to claim 4, wherein The intake section (113) includes first cylindrical section (1131), intermediate conical section (1132) and second cylindrical section (1133), and the separation section (112), the first cylindrical section (1131), the intermediate conical section (1132) and the second cylindrical section (1133) are sequentially communicated;The inner diameter of the first cylindrical section (1131) is greater than the inner diameter of the second cylindrical section (1133);The gas outlet (41) of the sweep gas inlet pipe (4) is arranged on the side wall of the second cylindrical section (1133).

6. The device for removing surface dust of silicon powder according to claim 5, wherein The separation section (112) and the dust collection section (111) are both cylindrical, and the inner diameters of both are same with the inner diameter of the first cylindrical section (1131).

7. The device for removing surface dust of silicon powder according to claim 5, wherein The silicon powder outlet (12) is arranged on the end of the second cylindrical section (1133) away from the intermediate conical section (1132).

8. The apparatus for removing surface dust of silicon powder according to claim 4, wherein The side wall of the separation section (112) is further provided with baffle dispersion plate (6), and the baffle dispersion plate (6) is arranged with the outer periphery of the dispersion component (3) with gap.

9. The apparatus for removing surface dust of silicon powder according to claim 1, wherein The sweep gas inlet pipe (4) is connected with sweep gas blowing device.

10. The apparatus for removing surface dust of silicon powder according to claim 1, wherein The sweep gas is nitrogen.

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