Silicon powder discharging device
By designing a silicon powder unloading device, which automatically separates silicon powder using a solid-gas separator and a precision separator, the problems of gas leakage and environmental pollution during the silicon powder gas emission process are solved, and safe and efficient silicon powder collection is achieved.
Patent Information
- Application Number
- CN202520237460.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-02-14
AI Technical Summary
In existing technologies, silicon powder has gas leakage and safety hazards during the gas emission process, and the emitted gas has an impact on the environment.
A silicon powder unloading device was designed, including a collection tank, a solid-gas separator, and a precision separator. The solid-gas separator initially separates most of the silicon powder, and the precision separator further separates a small amount of silicon powder from the gas. An exhaust fan provides gas flow, and a vibrator and control valve are used for automated operation during the separation process.
It achieves complete separation of gas and silicon powder, avoiding gas leakage and safety hazards, and reducing environmental pollution.
Smart Images
Figure CN223732333U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a solid and gas separation equipment, specifically to a silicon powder unloading device. BACKGROUND
[0002] In the production and manufacture of polysilicon, various reducing gases are needed, which need to be discharged after use. However, a large amount of silicon powder will be mixed in the discharged gas.
[0003] At present, the gas is discharged into a collection tank, and then the silicon powder is collected manually by a bag at the discharge port of the collection tank. However, there is gas leakage, which causes the silicon powder bag to bulge. In addition, before discharging the silicon powder, nitrogen is replaced to discharge the gas in the silicon powder bag. However, a small amount of chlorosilane is mixed in the gas discharged from the silicon powder bag, which has certain safety hazards, and the discharged gas also contains silicon powder, which affects the environment. UTILITY MODEL CONTENT
[0004] In view of the technical problem that the silicon powder needs to be collected by a bag at the discharge port of the collection tank in the prior art, the utility model provides a silicon powder unloading device, which has the advantage of automatically separating the gas and the silicon powder.
[0005] The technical scheme of the utility model is as follows:
[0006] A silicon powder unloading device comprises:
[0007] A collection tank, the top of which is a collection port, and the bottom of which is a first discharge port;
[0008] A solid-gas separator, the side of which has a feeding port, the top of which has a first exhaust port, and the bottom of which has a second discharge port, wherein the feeding port is communicated with the first discharge port;
[0009] A precision separator, one side of which has an air inlet, the other side of which has a second exhaust port, and the bottom of which has a third discharge port, wherein the air inlet is communicated with the first exhaust port;
[0010] An exhaust fan, the input end of which is communicated with the second exhaust port.
[0011] Optionally, a unloading valve is installed on the second discharge port of the solid-gas separator.
[0012] Optionally, a vibrator is arranged outside the unloading valve.
[0013] Optionally, a collection box is installed on the third discharge port of the precision separator.
[0014] Optionally, a control valve is arranged between the collection box and the precision separator.
[0015] Optionally, the solid-gas separator comprises:
[0016] a first shell, a side of which is provided with the feeding port, a top of which is provided with the first exhaust port, and a bottom of which is provided with the second discharge port;
[0017] a baffle, which is arranged in the first shell in a vertical direction and is located between the feeding port and the first exhaust port, and a gap is present between the bottom of the baffle and the second discharge port.
[0018] Optionally, the bottom of the first shell is in a funnel structure, and the second discharge port is arranged at the bottom of the funnel structure.
[0019] Optionally, the precision separator comprises:
[0020] a second shell, one side of which is provided with the air inlet, the other side of which is provided with the second exhaust port, and the bottom of which is provided with the third discharge port;
[0021] a screen, which is arranged in the second shell and is located between the air inlet and the second exhaust port;
[0022] wherein the third discharge port and the air inlet are located on the same side of the screen.
[0023] Optionally, the screen is arranged in a vertical direction, and the mesh diameter of the screen is less than or equal to 1 μm.
[0024] Optionally, the output end of the exhaust fan is communicated with a waste gas collector.
[0025] Compared with the prior art, the present application has the following beneficial effects:
[0026] The gas generated in the production process is discharged into the collection tank, and then is transported to the solid-gas separator through the first discharge port at the bottom of the exhaust tank, and is separated in the solid-gas separator for the first time, most of the silicon powder in the gas is separated, and then the silicon powder is collected from the second discharge port at the bottom of the solid-gas separator, and the gas is sent into the precision separator from the first exhaust port at the bottom and top of the solid-gas separator, and a small amount of silicon powder mixed in the gas is separated in the precision separator.
[0027] In the technical solution, the silicon powder in the gas can be completely separated, so that the problem of gas leakage when collecting the silicon powder can be avoided. BRIEF DESCRIPTION OF DRAWINGS
[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.
[0029] Figure 1 is a structural schematic diagram of the present application;
[0030] Figure 2 is a structural schematic diagram of the solid-gas separator;
[0031] Figure 3 is a structural schematic diagram of the precision separator. DETAILED DESCRIPTION
[0032] In the following, only certain exemplary embodiments are simply described. As those skilled in the art will realize, the described embodiments can be modified in various different manners without departing from the spirit or scope of the present application. The drawings and description are therefore considered to be exemplary in nature rather than limiting.
[0033] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact, or can include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "over" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. "Under", "below" and "underneath" of a first feature to a second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.
[0034] The following disclosure provides many different embodiments or examples for implementing different structures of the present application. For the purpose of simplifying the present application, the components and settings of specific examples are described in the following. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.
[0035] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
[0036] Embodiment:
[0037] Referring to Figure 1 , a silicon powder unloading device, comprising a collecting tank 1, a solid-gas separator 2, a precision separator 3 and an exhaust fan 4.
[0038] The top of the collecting tank 1 is provided with a collecting port, and the bottom of the collecting tank 1 is provided with a first discharge port 11. One side of the solid-gas separator 2 is provided with an inlet port 21, the top of the solid-gas separator 2 is provided with a first exhaust port 22, and the bottom of the solid-gas separator 2 is provided with a second discharge port 23. One side of the precision separator 3 is provided with an air inlet port 31, the other side of the precision separator 3 is provided with a second exhaust port 32, and the bottom of the precision separator 3 is provided with a third discharge port 33. The exhaust fan 4 is provided with an input end and an output end.
[0039] Specifically, the collecting port at the top of the collecting tank 1 is communicated with an exhaust pipeline in the production process, the first discharge port 11 at the bottom of the collecting tank 1 is communicated with the inlet port 21 on the solid-gas separator 2, the first discharge port 11 on the solid-gas separator 2 is communicated with the air inlet port 31 on the precision separator 3, the second exhaust port 32 of the precision separator 3 is communicated with the input end of the exhaust fan 4, and the output end of the exhaust fan 4 is communicated with a waste gas collector.
[0040] In the embodiment, the exhaust fan 4 provides power for the gas flow of the entire device. The gas generated in the production process is discharged into the collecting tank 1 and temporarily stored. The gas is transported to the solid-gas separator 2 through the first discharge port 11 at the bottom of the exhaust tank, and the gas is separated in the solid-gas separator 2 for the first time to separate most of the silicon powder in the gas. Then, the silicon powder is collected from the second discharge port 23 at the bottom of the solid-gas separator 2, and the gas is sent to the precision separator 3 from the first exhaust port 22 at the bottom of the solid-gas separator 2. The small amount of silicon powder mixed in the gas is separated in the precision separator 3.
[0041] In the technical solution, the silicon powder in the gas can be completely separated, so that the problem of gas leakage caused by collecting the silicon powder can be avoided.
[0042] In one specific embodiment,
[0043] The second discharge port 23 of the solid-gas separator 2 is provided with a discharge valve 5, and an vibrator 6 is arranged outside the discharge valve 5. When the silicon powder in the solid-gas separator 2 is collected, the entire system stops working and is closed, the valve between the collecting tank 1 and the solid-gas separator 2 is closed, a collecting bag is sleeved on the second discharge port 23 of the solid-gas separator 2, and the discharge valve 5 is opened to collect the silicon powder. The vibrator 6 arranged outside the discharge valve 5 realizes rapid discharge and avoids the blockage of the discharge valve 5 by the silicon powder.
[0044] In another specific embodiment,
[0045] The third discharge port 33 of the precision separator 3 is provided with a collecting box 7, and a control valve 8 is arranged between the collecting box 7 and the precision separator 3. After the entire device works for a certain period of time or when the silicon powder in the solid-gas separator 2 is collected, the entire device is in a shutdown state. At this time, the control valve 8 is opened, so that the silicon powder in the precision separator 3 flows into the collecting box 7 to collect the silicon powder in the precision separator 3.
[0046] In another specific embodiment,
[0047] Referring to Figure 2 , the solid-gas separator 2 comprises a first shell 24 and a baffle 25. Wherein, the inlet 21 is arranged at the side of the first shell 24, the first exhaust port 22 is arranged at the top of the first shell 24, the second discharge port 23 is arranged at the bottom of the first shell 24, and the bottom of the first shell 24 is in a funnel structure, and the second discharge port 23 is located at the bottom end of the funnel structure.
[0048] The baffle 25 is arranged inside the first shell 24, the baffle 25 is arranged vertically, and the baffle 25 is located between the inlet 21 and the first exhaust port 22, and in addition, there is a gap between the bottom end of the baffle 25 and the second discharge port 23.
[0049] In this embodiment, the baffle 25 is located in front of the inlet 21, so that the solid-gas mixture entering the first shell 24 from the inlet 21 contacts the baffle 25, and the solid is affected by its own gravity after contacting the baffle 25, and falls to deposit at the bottom of the first shell 24, while the gas is turned over the baffle 25 and discharged from the first exhaust port 22.
[0050] After passing through the solid-gas separator 2, most of the silicon powder will be deposited at the bottom of the first shell 24, and by arranging the bottom of the first shell 24 in a funnel structure, it can avoid the bottom of the first shell 24 from having a dead angle, causing the silicon powder to accumulate and be unable to be processed.
[0051] In another specific embodiment,
[0052] The precision separator 3 comprises a second shell 34 and a screen 35, wherein the gas inlet 31 is arranged at one side of the second shell 34, the second exhaust port 32 is arranged at the other side of the second shell 34, and the third discharge port 33 is arranged at the bottom of the second shell 34.
[0053] The screen 35 is arranged inside the second shell 34, and the screen 35 is located between the gas inlet 31 and the second exhaust port 32, and the screen 35 is arranged in a vertical direction, and the mesh diameter of the screen 35 is less than or equal to 1 μm.
[0054] The third discharge port 33 and the gas inlet 31 described above are both located on the same side of the screen 35.
[0055] In this embodiment, the particle size of the silicon powder is 1 μm, so the mesh size of less than or equal to 1 μm is arranged to completely block the small amount of silicon powder mixed in the gas. In addition, by arranging the solid-gas separator 2 before the precision separator 3, it can effectively prevent the silicon powder from blocking the screen 35.
[0056] The above-described embodiments only express the specific implementation of the present utility model, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present utility model patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present utility model, a number of modifications and improvements can be made, which are within the protection scope of the present utility model.
Claims
1. A silicon powder discharge apparatus characterized by comprising: The device comprises: a collecting tank with a collecting opening at the top and a first discharge opening at the bottom; a solid-gas separator with an inlet opening at the side, a first gas discharge opening at the top, and a second discharge opening at the bottom, the inlet opening being in communication with the first discharge opening; a precision separator with an air inlet opening at one side, a second gas discharge opening at the other side, and a third discharge opening at the bottom, the air inlet opening being in communication with the first gas discharge opening; an exhaust fan with an input end in communication with the second gas discharge opening.
2. The device according to claim 1, wherein a discharge valve is installed on the second discharge opening of the solid-gas separator.
3. The device according to claim 2, wherein a vibrator is arranged outside the discharge valve.
4. The device according to claim 1, wherein a collecting box is installed on the third discharge opening of the precision separator.
5. The device according to claim 4, wherein a control valve is arranged between the collecting box and the precision separator.
6. The device according to claim 1, wherein the solid-gas separator comprises: a first housing with the inlet opening at the side, the first gas discharge opening at the top, and the second discharge opening at the bottom; a baffle arranged in the first housing in the vertical direction and located between the inlet opening and the first gas discharge opening, a gap being present between the bottom of the baffle and the second discharge opening.
7. The device according to claim 6, wherein the bottom of the first housing is in the shape of a funnel, and the second discharge opening is arranged at the bottom of the funnel-shaped structure.
8. The device according to claim 1, wherein the precision separator comprises: a second housing with the air inlet opening at one side, the second gas discharge opening at the other side, and the third discharge opening at the bottom; a screen arranged in the second housing and located between the air inlet opening and the second gas discharge opening; wherein the third discharge opening and the air inlet opening are located on the same side of the screen.
9. The device according to claim 8, wherein the screen is arranged in the vertical direction, and the mesh diameter of the screen is less than or equal to 1 μm.
10. The device according to claim 1, wherein an output end of the exhaust fan is in communication with a waste gas collector.