Granular silicon jacket type powder discharging equipment

Abstract

The utility model provides granular silicon jacket type powder discharging equipment which is used for discharging powder of a silicon powder collecting tank (1) and comprises a jacket device (2) arranged at a silicon powder outlet of the silicon powder collecting tank (1), the jacket device (2) is of a hollow double-layer sleeve structure, an inner layer is used for discharging the silicon powder from the silicon powder outlet of the silicon powder collecting tank (1), and an outer layer is used for discharging the silicon powder from the silicon powder outlet of the silicon powder collecting tank (1). And the outer layer is used for collecting the escaping silicon powder when the silicon powder is discharged. A double-layer jacket sealing structure is adopted for the powder discharging port, dynamic air seal is formed by the negative pressure layer of the jacket through the vacuumizing device, and the powder spraying problem of the powder discharging port is solved.

Description

Technical Field

[0001] This utility model relates to a powder discharge device, and more particularly to a granular silicon jacketed powder discharge device. Background Technology

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

[0003] In a fluidized bed reactor, silane gas undergoes heterogeneous decomposition into silicon and hydrogen. Silicon deposits on the seed crystal surface, forming 1-3 mm granular polycrystalline silicon. Some of the decomposed silicon does not adhere to the seed crystal surface, forming silicon powder. This powder, along with the hydrogen generated in the reaction and unreacted silane gas, forms tail gas that is discharged from the fluidized bed. The tail gas passes through a silicon powder filter, where silicon powder adheres to the filter element. Through a backflushing system, the silicon powder is discharged into a silicon powder collection tank, and finally, silicon powder is recovered using a silicon powder collection bag.

[0004] During the powder removal process, silicon powder will be sprayed out from above the silicon powder collection bag, which will cause environmental pollution and have a certain impact on the respiratory system of the powder removal personnel. Powder removal operators need to wear dust masks.

[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 granular silicon jacketed powder discharge device to address the shortcomings of the existing technology.

[0007] To solve the above-mentioned technical problems, this utility model discloses a granular silicon jacketed powder discharge device for discharging silicon powder from a silicon powder collection tank, comprising:

[0008] A jacket device is installed at the silicon powder outlet of the silicon powder collection tank. The jacket device is a hollow double-layer sleeve structure, wherein the inner layer is used to discharge silicon powder from the silicon powder outlet of the silicon powder collection tank, and the outer layer is used to collect the silicon powder that escapes during the discharge.

[0009] Furthermore, one end of the jacket device is fluidly connected to the silicon powder outlet at the bottom of the silicon powder collection tank, and the other end is detachably equipped with a silicon powder collection bag.

[0010] The outer side of the jacket device is open and fluidly connected to a silicon powder filter for collecting silicon powder from the outer layer.

[0011] Furthermore, the silicon powder filter is connected to a vacuum pumping device, which creates a negative pressure on the outer layer of the jacketed device through the silicon powder filter and pipes.

[0012] Furthermore, the jacket device includes:

[0013] The jacket has a hollow tubular outer wall and a hollow tubular inner wall, wherein the outer wall is fitted over the inner wall.

[0014] Furthermore, the outer wall of the jacket and the inner wall of the jacket are coaxially arranged.

[0015] Furthermore, the silicon powder collection bag has a double-layer bag structure, comprising:

[0016] Inner bag and outer bag; wherein the outer bag is fitted over the outside of the inner bag.

[0017] Furthermore, the top of the inner wall of the jacket is fluidly connected to the powder discharge port at the bottom of the silicon powder collection tank;

[0018] The bottom of the inner wall of the jacket is detachably connected to the top opening of the inner bag, and the connection point is the fixing point of the inner bag.

[0019] Furthermore, the cavity formed by the outer wall of the jacket and the inner wall of the jacket is closed at the top;

[0020] The bottom of the outer wall of the jacket and the top opening of the outer bag are detachably connected, and the connection point is the fixing point of the outer bag.

[0021] Furthermore, a pipe is fixedly provided at the opening on the inner wall side of the jacket, which is in fluid connection with the silicon powder filter.

[0022] Furthermore, the silicon powder filter filters the substance input through the pipeline to obtain waste silicon powder.

[0023] Beneficial effects:

[0024] The powder discharge port proposed in this utility model adopts a double-layer jacketed sealing structure. By using a vacuum device, a dynamic air seal is formed in the negative pressure layer of the jacket, thus solving the problem of powder spraying from the powder discharge port. Attached Figure Description

[0025] 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.

[0026] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0027] In the diagram, 1 is the silicon powder collection tank, 2 is the jacket device, 3 is the silicon powder collection bag, 4 is the silicon powder filter, 5 is the vacuum device; 11 is the powder discharge port, 21 is the outer wall of the jacket, 22 is the inner wall of the jacket, 31 is the inner bag, 32 is the outer bag, 311 is the inner bag fixing point, and 321 is the outer bag fixing point. Detailed Implementation

[0028] This utility model addresses the problem of powder spraying from the discharge port of a silicon powder collection tank by proposing a granular silicon jacketed powder discharge device, such as... Figure 1 As shown, it includes:

[0029] A jacketed device 2 is installed at the silicon powder outlet of the silicon powder collection tank 1. This jacketed device 2 has a hollow double-layered tube structure. The inner cavity connects the silicon powder collection tank 1 and the silicon powder collection bag 3, serving as a conventional powder discharge channel. The outer cavity is connected to a silicon powder filter 4 via a pipe, used to collect overflowing silicon powder. The silicon powder filter 4 is connected to a vacuum device 5, which creates negative pressure in the outer cavity through the silicon powder filter 4.

[0030] The hollow double-layer sleeve structure of the jacket device 2 includes: a hollow tubular jacket outer wall 21 and a hollow tubular jacket inner wall 22, with the jacket outer wall 21 sleeved on the outside of the jacket inner wall 22.

[0031] The silicon powder collection bag 3 has a double-layer bag structure, including an inner bag 31 and an outer bag 32, wherein the outer bag 32 is fitted over the inner bag 31.

[0032] The top of the inner wall 22 of the jacket is fluidly connected to the powder discharge port 11 at the bottom of the silicon powder collection tank 1, and the bottom is connected to the top opening of the inner bag 31. The connection point is the inner bag fixing point 311.

[0033] The cavity formed by the outer wall 21 and the inner wall 22 of the jacket is closed at the top and connected at the bottom to the interlayer opening formed by the inner bag 31 and the outer bag 32. The connection point between the outer wall 21 of the jacket and the outer bag 32 is the outer bag fixing point 321.

[0034] A pipe is fixedly installed on the inner wall 22 of the jacket, which is in fluid connection with the silicon powder filter 4.

[0035] The silicon powder filter 4 filters the substances input through the pipeline, collects waste silicon powder, and discharges it from the bottom.

[0036] When using:

[0037] 1. Connect the inner bag 31 of the silicon powder collection bag 3 to the inner layer of the jacket device 2, i.e., the powder discharge channel formed by the inner wall 22 of the jacket, and the powder discharge main channel, i.e., the powder discharge port 11 at the bottom of the silicon powder collection tank. The connection point is the inner bag fixing point 311.

[0038] 2. Connect the outer bag 32 of the silicon powder collection bag 3 to the outer wall of the jacket 2, i.e., the channel formed by the inner wall 22 and the outer wall 21 of the jacket, with the connection point being the outer bag fixing point 321;

[0039] 3. The channel formed by the inner wall 22 and the outer wall 21 of the jacket is a negative pressure chamber, which is connected to the vacuum device 5 through the silicon powder filter 4. The negative pressure chamber forms a dynamic air seal, and the silicon powder escaping from the inner bag fixing point 311 is immediately captured into the silicon powder filter 4, which can effectively prevent powder spraying from the powder discharge port.

[0040] This utility model provides a concept and method for a jacketed powder discharge device for granular silicon. 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. A granular silicon jacketed powder discharge device for discharging silicon powder from a silicon powder collection tank (1), characterized in that, include: A jacket device (2) is installed at the silicon powder outlet of the silicon powder collection tank (1). The jacket device (2) is a hollow double-layer sleeve structure, wherein the inner layer is used to discharge silicon powder from the silicon powder outlet of the silicon powder collection tank (1), and the outer layer is used to collect the silicon powder that escapes when the silicon powder is discharged.

2. The granular silicon jacketed powder discharge device according to claim 1, characterized in that, One end of the jacket device (2) is fluidly connected to the silicon powder outlet at the bottom of the silicon powder collection tank (1), and the other end is detachably equipped with a silicon powder collection bag (3); The outer side of the jacket device (2) is open and fluidly connected to the silicon powder filter (4) for collecting silicon powder from the outer layer.

3. The granular silicon jacketed powder discharge device according to claim 2, characterized in that, The silicon powder filter (4) is connected to the vacuum pumping device (5), and the vacuum pumping device (5) forms a negative pressure on the outer layer of the jacket device (2) through the silicon powder filter (4) and the pipe.

4. The granular silicon jacketed powder discharge device according to claim 3, characterized in that, The jacket device (2) includes: A hollow tubular jacket outer wall (21) and a hollow tubular jacket inner wall (22), wherein the jacket outer wall (21) is fitted over the jacket inner wall (22).

5. The granular silicon jacketed powder discharge device according to claim 4, characterized in that, The outer wall (21) and the inner wall (22) of the jacket are coaxially arranged.

6. The granular silicon jacketed powder discharge device according to claim 5, characterized in that, The silicon powder collection bag (3) has a double-layer bag structure, including: Inner bag (31) and outer bag (32); wherein the outer bag (32) is fitted over the outside of the inner bag (31).

7. A granular silicon jacketed powder discharge device according to claim 6, characterized in that, The top of the inner wall (22) of the jacket is fluidly connected to the powder discharge port (11) at the bottom of the silicon powder collection tank (1); The bottom of the inner wall (22) of the jacket is detachably connected to the top opening of the inner bag (31), and the connection point is the inner bag fixing point (311).

8. The granular silicon jacketed powder discharge device according to claim 7, characterized in that, The cavity formed by the outer wall (21) and the inner wall (22) of the jacket is closed at the top; The bottom of the outer wall (21) of the jacket and the top opening of the outer bag (32) are detachably connected, and the connection point is the outer bag fixing point (321).

9. A granular silicon jacketed powder discharge device according to claim 8, characterized in that, A pipe is fixed at the side opening of the inner wall (22) of the jacket, which is in fluid connection with the silicon powder filter (4).

10. A granular silicon jacketed powder discharge device according to claim 9, characterized in that, The silicon powder filter (4) filters the substance input through the pipeline to obtain waste silicon powder.

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