Device for discharging silicon powder in polycrystalline silicon reduction tail gas

Abstract

The utility model provides a polycrystalline silicon reduction tail gas silicon powder discharging device, relates to the technical field of polycrystalline silicon production, and aims at solving the problems that in the prior art, a silicon powder discharging device is prone to being blocked, inconvenient to use and large in safety risk, and the polycrystalline silicon reduction tail gas silicon powder discharging device comprises a discharging assembly and a unblocking assembly. The unblocking assembly comprises a fixing plate, a hand wheel, a rotating shaft and a spiral blade, and a first through hole is formed in the fixing plate; the upper end of the discharging assembly is used for being connected with a conical discharging opening, and the lower end of the discharging assembly is connected with the fixing plate. The lower end of the rotating shaft is connected with the hand wheel, the upper end of the rotating shaft is connected with the spiral blade, the rotating shaft penetrates through the fixing plate through the first through hole, and the spiral blade is located in the discharging assembly. The opening in the lower end of the discharging pipe is unblocked through rotation of the spiral blade in the unblocking assembly, and the phenomenon of blockage in the discharging pipe is avoided.

Description

Technical Field

[0001] This application belongs to the technical field of polysilicon production, and particularly relates to a device for discharging silicon powder from the reduction tail gas of polysilicon. Background Art

[0002] When molten elemental silicon solidifies under supercooled conditions, silicon atoms arrange in a diamond lattice form to form many crystal nuclei. If these crystal nuclei grow into grains with different crystal plane orientations, these grains combine to crystallize into polysilicon. During the production of polysilicon, its tail gas often contains some silicon powder. To avoid waste, it is usually necessary to recover the silicon powder in the tail gas.

[0003] The recovery of silicon powder usually uses a silicon powder discharge device. Through the silicon powder discharge device, the silicon powder in the tail gas is separated, and the separated gas is discharged. The use of the silicon powder discharge device reduces the silicon powder content in the tail gas, saves resources, and also protects the environment.

[0004] However, when the existing polysilicon reduction tail gas silicon powder discharge device is in use, the discharge pipe opening is too large, and the pipe opening may be blocked in the early stage of starting up. Also, when the existing polysilicon reduction tail gas silicon powder discharge device is in use, the binding of the silicon powder bag cannot be completely sealed, and the silicon powder has a high temperature, posing a great safety risk and being inconvenient to use. Summary of the Utility Model

[0005] The embodiment of this application provides a device for discharging silicon powder from the reduction tail gas of polysilicon, aiming to solve the problems in the prior art that the silicon powder discharge device is prone to blockage, inconvenient to use, and has a great safety risk.

[0006] To achieve the above purpose, the embodiment of this application provides the following technical solutions:

[0007] The embodiment of this application provides a device for discharging silicon powder from the reduction tail gas of polysilicon. The device includes: a discharge assembly (1) and a blockage clearing assembly (2). The blockage clearing assembly (2) includes: a fixing plate (21), a handwheel (24), a rotating shaft (25), and a spiral blade (26). A first through hole (22) is provided on the fixing plate (21);

[0008] The upper end of the discharge assembly (1) is used to connect to the conical discharge port (9), and the lower end is connected to the fixing plate (21);

[0009] The lower end of the rotating shaft (25) is connected to the handwheel (24), and the upper end is connected to the spiral blade (26), and passes through the fixing plate (21) through the first through hole (22). Among them, the spiral blade (26) is located inside the discharge assembly;

[0010] Optionally, the blockage clearing assembly (2) further includes: a plurality of connecting rods (23);

[0011] The lower ends of the multiple connecting rods (23) are fixedly connected to the upper surface of the fixed plate (21), and the upper ends are fixedly connected to the lower end of the discharge assembly (1);

[0012] Optionally, an external thread is provided on the outer wall of the rotating shaft, and an internal thread is provided on the inner wall of the first through hole;

[0013] The external thread on the outer wall of the rotating shaft 25 is in threaded connection with the internal thread on the inner wall of the first through hole 22;

[0014] Optionally, the device further includes: a clamp assembly (3), a mounting plate (5) and a connection assembly (8). A second through hole (12) is provided on the side wall of the discharge assembly (1), a third through hole (51) is provided on the mounting plate (5), and a collection assembly (4) is sleeved outside the mounting plate;

[0015] The clamp assembly (3) is arranged outside the collection assembly (4) for making the collection assembly (4) in abutting connection with the mounting plate (5);

[0016] One end of the connection assembly (8) is fixedly connected to the side wall of the discharge assembly (1) to wrap the second through hole (12), and the other end passes through the mounting plate (5) through the third through hole (51) into the collection assembly (4);

[0017] Optionally, the clamp assembly (3) includes: a first semi-circular ring (31), a second semi-circular ring (35) and a plurality of double-headed bolts (37);

[0018] First ear seats (32) are fixedly connected to the front and rear end faces of the first semi-circular ring (31), and a fourth through hole (33) is provided on the outer wall of the first ear seat (32);

[0019] Second ear seats (34) are fixedly connected to the front and rear end faces of the second semi-circular ring (35), and a fifth through hole (36) is provided on the outer wall of the second ear seat (34);

[0020] One end of the double-headed bolt (37) is in threaded connection with the fourth through hole (33), and the other end is in threaded connection with the fifth through hole (36);

[0021] Optionally, the device further includes: an exhaust assembly (6) and a filter (7), and a sixth through hole (52) is provided on the mounting plate (5);

[0022] The exhaust assembly (6) is arranged on the upper surface of the mounting plate (5);

[0023] One end of the exhaust component (6) is fixedly connected to the upper surface of the mounting plate (5) to wrap the sixth through hole (52), and the other end is fixedly connected to the filter (7).

[0024] Optionally, the filter (7) includes: a filter element (71), a plurality of fastening bolts (73) and a plurality of mounting posts (74). The periphery of the surface of the filter element (71) is provided with a seventh through hole (72). The mounting posts (74) are fixedly connected to the front and rear ends of the inner walls on both sides of the filter (7). One end of the mounting post (74) is provided with a mounting hole (75).

[0025] The filter element (71) is fixedly connected to the inside of the filter (7) through the mounting posts (74).

[0026] One end of the fastening bolt (73) is threadedly connected to the inside of the seventh through hole (72), and the other end passes through the seventh through hole (72) and is threadedly connected to the inside of the mounting hole (75).

[0027] Optionally, the discharge component (1) includes: at least two control valves (11).

[0028] The control valve (11) is fixedly connected to the outer wall of the discharge component (1).

[0029] Optionally, the connection component (8) includes: a disc valve (81).

[0030] The disc valve (81) is fixedly connected to the outer wall of the connection component (8).

[0031] Optionally, a plurality of inclined baffles (91) are arranged inside the conical discharge port (9).

[0032] The inclined baffles (91) are fixedly connected to the inside of the conical discharge port (9), and the fixed inclination directions of two adjacent inclined baffles (91) are opposite.

[0033] The battery protection device provided by the embodiment of the present application includes a discharge component (1) and a through-blocking component (2). The through-blocking component (2) includes a fixing plate (21), a handwheel (24), a rotating shaft (25), and a spiral blade (26). A first through hole (22) is provided on the fixing plate (21). The upper end of the discharge component (1) is used to be connected to the tapered discharge port (9), and the lower end is connected to the fixing plate (21). The lower end of the rotating shaft (25) is connected to the handwheel (24), and the upper end is connected to the spiral blade (26) and passes through the fixing plate (21) through the first through hole (22). Among them, the spiral blade (26) is located inside the discharge component. The lower opening of the discharge pipe is blocked and unblocked by the rotation of the spiral blade in the through-blocking component, avoiding the phenomenon of blockage in the discharge pipe, and is used to solve the problem that the silicon powder discharge device in the prior art is easy to be blocked, inconvenient to use, and has a large safety risk. Description of the Drawings

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings. The drawings here are incorporated into the specification and constitute a part of this specification, showing the embodiments that meet the present application, and are used together with the specification to explain the principles of the present application.

[0035] Figure 1 Structural schematic diagram of the silicon powder discharge device for the tail gas of polysilicon reduction provided by the embodiment of the present application;

[0036] Figure 2 For Figure 1 Structural schematic diagram of the through-blocking component 2 in the middle;

[0037] Figure 3 For Figure 1 Structural schematic diagram of the clamp component 3 in the middle;

[0038] Figure 4 For Figure 1 Structural schematic diagram of the filter 7 in the middle.

[0039] Through the above drawings, the clear embodiments of the present application have been shown, and there will be more detailed descriptions later. These drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to explain the concept of the present application to those skilled in the art by referring to specific embodiments.

[0040] Description of the reference numerals:

[0041] 1 - Discharge component;

[0042] 11 - Control valve; 12 - Second through - hole;

[0043] 2 - Plugging and unplugging assembly;

[0044] 21 - Fixed plate; 22 - First through - hole; 23 - Connecting rod; 24 - Handwheel; 25 - Rotating shaft; 26 - Spiral blade;

[0045] 3 - Clamping component;

[0046] 31 - First semi - circular ring; 32 - First ear seat; 33 - Fourth through - hole; 34 - Second ear seat; 35 - Second semi - circular ring; 36 - Fifth through - hole; 37 - Stud bolt;

[0047] 4 - Collection component;

[0048] 5 - Mounting plate;

[0049] 51 - Third through - hole; 52 - Sixth through - hole;

[0050] 6 - Exhaust component;

[0051] 7 - Filter;

[0052] 71 - Filter element; 72 - Seventh through - hole; 73 - Fastening bolt; 74 - Mounting post; 75 - Mounting hole;

[0053] 8 - Connection component;

[0054] 81 - Disk valve;

[0055] 9 - Conical part discharge port;

[0056] 91 - Inclined baffle. Detailed implementation manners

[0057] To make the objectives, technical solutions and advantages of the present application clearer, the following will clearly and completely describe the technical solutions in the present application and how the technical solutions in the present application solve the above - mentioned technical problems with specific embodiments in combination with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. These several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0058] In the description and claims of this application and the above-mentioned drawings, terms such as "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0059] In the embodiments of this application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present relevant concepts in a specific manner.

[0060] During the production process of polysilicon, its tail gas often contains some silicon powder. In order to avoid waste, it is usually necessary to recover the silicon powder in the tail gas. The recovery of silicon powder usually uses a silicon powder discharge device. Through the silicon powder discharge device, the silicon powder in the tail gas is separated, and the separated gas is discharged. However, when the existing polysilicon reduction tail gas silicon powder discharge device is in use, the discharge pipe opening is too large, and the pipe opening may be blocked in the early stage of starting up. Moreover, when the existing polysilicon reduction tail gas silicon powder discharge device is in use, the binding of the silicon powder bag cannot be completely sealed, and the temperature of the silicon powder is high, with extremely high safety risks and inconvenience in use.

[0061] Therefore, the embodiments of this application provide a polysilicon reduction tail gas silicon powder discharge device. By setting a blocking and unblocking component and a clamp component, the rotation of the spiral blade in the blocking and unblocking component is used to block and unblock the lower opening of the discharge pipe, avoiding the phenomenon of blockage in the discharge pipe. At the same time, the silicon powder bag is fixed on the mounting plate by the first semi-circular ring and the second semi-circular ring in the clamp component, thereby strengthening the sealing performance at the installation location of the silicon powder bag and facilitating use, so as to solve the problems in the prior art that the silicon powder discharge device is prone to blockage, resulting in inconvenience in use and great safety risks.

[0062] The technical solutions of the present utility model will be described in detail below in conjunction with the drawings and specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0063] Such as Figure 1 and Figure 2As shown in the figure, an embodiment of the present application provides a device for discharging silicon powder from the tail gas of polysilicon reduction, including: a discharge assembly 1 and a blocking and unblocking assembly 2. The blocking and unblocking assembly 2 includes: a fixing plate 21, a handwheel 24, a rotating shaft 25, and a spiral blade 26. A first through hole 22 is provided on the fixing plate 21. The upper end of the discharge assembly 1 is used to connect to the conical discharge port 9, and the lower end is connected to the fixing plate 21. The lower end of the rotating shaft 25 is connected to the handwheel 24, and the upper end is connected to the spiral blade 26 and passes through the fixing plate 21 through the first through hole 22. Among them, the spiral blade 26 is located inside the discharge assembly.

[0064] In the embodiment of the present application, the conical discharge port 9 is open upward so that the tail gas can be discharged into the discharge assembly 1. Among them, the discharge assembly 1 can be set as a through pipe or a square pipe, and its shape is not limited.

[0065] The blocking and unblocking assembly 2 includes a handwheel 24, a rotating shaft 25, and a spiral blade 26. The top of the handwheel 24 is fixedly connected to the rotating shaft 25. The top end of the rotating shaft 25 passes through the first through hole 22 and is located below the inner side of the discharge assembly 1. A spiral blade 26 is sleeved on the upper part of the outer wall of the rotating shaft 25. The first through hole 22 is opened at the central position of the surface of the fixing plate 21. The inner wall of the first through hole 22 is provided with internal threads, and the outer wall of the rotating shaft 25 is provided with external threads. The external threads on the outer wall of the rotating shaft 25 are screwed with the internal threads on the inner wall of the first through hole 22.

[0066] During the use process, before starting the device for the first time, rotate the handwheel 24. The handwheel 24 drives the rotating shaft 25 and the spiral blade 26 to rotate. The rotating shaft 25 and the first through hole 22 are connected by threads. Under the action of the threads, the rotating shaft 25 will move along or against the direction of the thread engagement while rotating, thereby driving the spiral blade 26 to move towards the inner side of the discharge assembly 1. The rotation of the spiral blade 26 is used to block and unblock the discharge assembly 1, avoiding the blockage of the discharge port of the discharge assembly 1 by silicon powder that may be caused by long-term parking.

[0067] As Figure 2 As shown in the figure, in a possible implementation manner, the blocking and unblocking assembly 2 further includes: a plurality of connecting rods 23. The lower ends of the plurality of connecting rods 23 are fixedly connected to the upper surface of the fixing plate 21, and the upper ends are fixedly connected to the lower end of the discharge assembly 1.

[0068] Specifically, the outer side of the upper surface of the fixing plate 21 is uniformly fixedly connected with connecting rods 23, and the tops of the connecting rods 23 are uniformly fixedly connected to the bottom end of the discharge assembly 1.

[0069] It can be understood that on the outer side of the upper surface of the fixing plate 21, for example, its edge or surrounding part is evenly fixedly connected with a plurality of connecting rods 23. The uniform fixed connection can be, for example, that the plurality of connecting rods 23 are equally spaced, equally angled or distributed according to a certain rule on the outer side of the upper surface of the fixing plate 21 to ensure the stability and balance of the structure.

[0070] The top ends of the connecting rods 23 are also evenly fixedly connected to the bottom end of the discharge assembly 1. For example, the tops of the plurality of connecting rods 23 are all connected to the bottom of the discharge assembly 1, and the connection is uniform. For example, the distance or angle between the connection points can be equal to firmly support the discharge assembly 1 on the fixing plate 21.

[0071] As Figure 2 As shown, in a possible implementation, an external thread is provided on the outer wall of the rotating shaft 25, and an internal thread is provided on the inner wall of the first through hole; the external thread on the outer wall of the rotating shaft 25 is threadedly engaged with the internal thread on the inner wall of the first through hole 22.

[0072] Among them, the first through hole 22 is opened at the central position of the surface of the fixing plate 21. The inner wall of the first through hole 22 is provided with an internal thread, and the outer wall of the rotating shaft 25 is provided with an external thread. The external thread on the outer wall of the rotating shaft 25 is threadedly engaged with the internal thread on the inner wall of the first through hole 22.

[0073] It can be understood that the rotating shaft 25 and the first through hole 22 are connected by threads. Under the action of the threads, the rotating shaft 25 will move along or against the direction of the threaded engagement while rotating. An external thread is provided on the outer wall of the rotating shaft 25, which can be, for example, a spiral-shaped protrusion machined on the outer surface of a cylindrical object for mating with an internal thread on other objects to achieve rotational connection or fastening. Correspondingly, an internal thread is provided on the inner wall of the first through hole 22, which can be, for example, a spiral-shaped groove matching the external thread.

[0074] In this embodiment, when the rotating shaft 25 is inserted into the first through hole 22, the external thread on its outer wall will engage with the internal thread on the inner wall of the through hole. By rotating the rotating shaft, the threads between the two can be continuously engaged, thereby achieving a tight connection. Threaded connection can provide reliable fastening force to ensure the firm connection between the rotating shaft 25 and the first through hole 22 and is not easy to loosen. And threaded connection is convenient for disassembly and reassembly. For example, the two can be easily separated by rotating the rotating shaft in the reverse direction. In addition, threaded connection can also have a certain sealing performance to prevent gas leakage to a certain extent.

[0075] As Figure 1As shown, in a possible implementation, a device for discharging silicon powder from the tail gas of polysilicon reduction further includes: a clamp assembly 3, a mounting plate 5, and a connecting assembly 8. A second through hole 12 is provided on the side wall of the discharging assembly 1, a third through hole 51 is provided on the mounting plate 5, and a collecting assembly 4 is sleeved outside the mounting plate; the clamp assembly 3 is arranged outside the collecting assembly 4 for making the collecting assembly 4 in contact connection with the mounting plate 5; one end of the connecting assembly 8 is fixedly connected to the side wall of the discharging assembly 1 to wrap the second through hole 12, and the other end passes through the mounting plate 5 through the third through hole 51 into the collecting assembly 4.

[0076] Among them, a second through hole 12 is provided at the central position of the outer wall on one side of the discharging assembly 1. The second through hole 12 is fixedly connected with a connecting assembly 8. The other end of the connecting assembly 8 passes through the mounting plate 5. A collecting assembly 4 is arranged on the outer surface of the mounting plate 5 through a clamp assembly 3. The inner side surface of the clamp assembly 3 is in contact connection with the upper part of the outer side surface of the collecting assembly 4, and the inner side surface of the collecting assembly 4 is in contact connection with the outer side surface of the mounting plate 5.

[0077] Specifically, first, the collecting assembly 4 is sleeved on the outer side surface of the mounting plate 5, and then the outer side surface of the clamp assembly 3 is in contact connection with the upper part of the outer side surface of the collecting assembly 4, realizing the installation of the collecting assembly 4 and making the sealing performance at the installation position of the collecting assembly 4 stronger.

[0078] It can be understood that the outer side surface of the clamp assembly 3 is in contact connection with the upper part of the outer side surface of the collecting assembly 4. The clamp assembly 3 can consider two factors, such as tightness and sealing performance, to realize the firm fixation of the collecting assembly 4 and effectively prevent silicon powder from leaking from the installation gap, so that the collecting assembly 4 is stably installed on the mounting plate 5. To make the clamp assembly 3 fit tightly, for example, possible sealing materials can be used, such as rubber gaskets, silicone rubber rings, etc., to form a sealing barrier and effectively block the material exchange between the external environment and the inside of the collecting assembly 4.

[0079] During use, the included angle between the connecting assembly 8 and the discharging assembly 1 can be 45° for example, and the pipe diameter of the connecting assembly 8 can be smaller than that of the discharging assembly 1, so as to further reduce the movement speed of the silicon powder.

[0080] Such as Figure 3As shown, in a possible implementation, the clamp assembly 3 includes: a first semi-circular ring 31, a second semi-circular ring 35, and a plurality of double-headed bolts 37; first ear seats 32 are fixedly connected to the front and rear end faces of the first semi-circular ring 31, and a fourth through hole 33 is provided on the outer wall of the first ear seat 32; second ear seats 34 are fixedly connected to the front and rear end faces of the second semi-circular ring 35, and a fifth through hole 36 is provided on the outer wall of the second ear seat 34; one end of the double-headed bolt 37 is threadedly connected to the fourth through hole 33, and the other end is threadedly connected to the fifth through hole 36.

[0081] Among them, the clamp assembly 3 includes a first semi-circular ring 31, a second semi-circular ring 35, and double-headed bolts 37. First ear seats 32 and second ear seats 34 are respectively fixedly connected to the front and rear end faces of the first semi-circular ring 31 and the second semi-circular ring 35. Fourth through holes 33 and fifth through holes 36 are respectively provided on the outer walls of the first ear seat 32 and the second ear seat 34. A double-headed bolt 37 is threadedly connected in the fourth through hole 33. One end of the double-headed bolt 37 penetrates through the fourth through hole 33 and is threadedly connected to the inner side of the fifth through hole 36. The inner sides of the first semi-circular ring 31 and the second semi-circular ring 35 are both in contact connection with the upper part of the outer side of the collection assembly 4.

[0082] During use, the collection assembly 4 is sleeved on the outer side of the mounting plate 5. Subsequently, the first semi-circular ring 31 and the second semi-circular ring 35 are in contact connection with the upper part of the outer side of the collection assembly 4. And at this time, the first ear seats 32 and the second ear seats 34 on the first semi-circular ring 31 and the second semi-circular ring 35 are in contact connection. Then, one end of the double-headed bolt 37 penetrates through the fourth through hole 33 on the first ear seat 32 and is threadedly connected into the fifth through hole 36 on the second ear seat 34, thereby realizing the installation of the collection assembly 4 and making the sealability at the installation position of the collection assembly 4 stronger.

[0083] As Figure 1 shown, in a possible implementation, a polysilicon reduction tail gas silicon powder exhaust device further includes: an exhaust assembly 6 and a filter 7. A sixth through hole 52 is provided on the mounting plate 5; the exhaust assembly 6 is arranged on the upper surface of the mounting plate 5; one end of the exhaust assembly 6 is fixedly connected to the upper surface of the mounting plate 5 to wrap the sixth through hole 52, and the other end is fixedly connected to the filter 7.

[0084] Among them, a sixth through hole 52 is provided on the other side of the upper surface of the mounting plate 5. An exhaust assembly 6 is fixedly connected to the sixth through hole 52, and a filter 7 is fixedly connected to the top end of the exhaust assembly 6.

[0085] It can be understood that during use, the gas containing silicon powder enters the exhaust assembly 6 through the connecting pipe 8 and then enters the filter 7 through the exhaust assembly 6. Under the action of the filter 7, the gas is separated from the silicon powder. After separation, the silicon powder falls into the collection assembly 4 under the action of gravity, thus realizing the recovery of the silicon powder.

[0086] As Figure 4 shown, in a possible implementation, the filter 7 includes: a filter element 71, a plurality of fastening bolts 73, and a plurality of mounting posts 74. The periphery of the surface of the filter element 71 is provided with seventh through holes 72. The mounting posts 74 are fixedly connected to the front and rear ends of the inner walls on both sides of the filter 7. One end of the mounting post 74 is provided with a mounting hole 75. The filter element 71 is fixedly connected to the inside of the filter 7 through the mounting posts 74. One end of the fastening bolt 73 is threadedly connected to the inside of the seventh through hole 72, and the other end passes through the seventh through hole 72 and is threadedly connected to the inside of the mounting hole 75.

[0087] Among them, the filter element 71 is fixedly connected to the inside of the filter 7 through the mounting posts 74. Seventh through holes 72 are provided around the surface of the filter element 71. Fastening bolts 73 are threadedly connected to the inside of the seventh through holes 72. The bottom ends of the fastening bolts 73 all pass through the seventh through holes 72 and are threadedly connected to the inside of the mounting holes 75. The mounting holes 75 are opened at the top ends of the mounting posts 74. The mounting posts 74 are respectively fixedly connected to the front and rear ends of the inner walls on both sides of the filter 7.

[0088] It can be understood that under the action of the filter element 71 in the filter 7, the gas is separated from the silicon powder.

[0089] Specifically, during use, when installing the filter element 71, place the filter element 71 on the top end of the mounting post 74, and align the seventh through hole 72 on the surface of the filter element 71 with the mounting hole 75 at the top end of the mounting post 74. Then, pass the bottom end of the fastening bolt 73 through the seventh through hole 72 and threadedly connect it to the inside of the mounting hole 75, thereby realizing the installation and fixation of the filter element 71. When it needs to be disassembled, unscrew the fastening bolt 73, and the filter element 71 can be taken out from the filter 7.

[0090] As Figure 1 shown, in a possible implementation, the discharge assembly 1 includes: at least two control valves 11; the control valves 11 are fixedly connected to the outer wall of the discharge assembly 1.

[0091] Among them, the fixed connection method of the control valve 11 can be, for example, that control valves 11 are fixedly connected to both the upper and lower parts of the outer wall of the discharge assembly 1 to realize the opening and closing of the discharge assembly 1.

[0092] As Figure 1As shown, in a possible implementation, the connection component 8 includes: a disk valve 81; the disk valve 81 is fixedly connected to the outer wall of the connection component 8.

[0093] Among them, a disk valve 81 is fixedly connected to the outer wall of the connection component 8, and the disk valve 81 can achieve rapid cutting off of the movement of silicon powder.

[0094] As Figure 1 shown, in a possible implementation, a plurality of inclined baffles 91 are arranged inside the conical discharge port 9; the inclined baffles 91 are fixedly connected to the inner side of the conical discharge port 9, and the fixed inclination directions of two adjacent inclined baffles 91 are opposite.

[0095] Among them, inclined baffles 91 can be fixedly connected above and below the inner side of the conical discharge port 9, and the inclination directions of the inclined baffles 91 are opposite.

[0096] It can be understood that during use, the tail gas enters the conical discharge port 9, and when the tail gas collides with the inclined baffle 91, due to the mutual collision between the two, a part of the kinetic energy of the tail gas is consumed, and thus the descending rate of the tail gas is reduced.

[0097] In summary, the embodiment of the present application provides a device for discharging silicon powder from the tail gas of polysilicon reduction. By setting the through-blocking component 2 and the clamp component 3, the rotation of the spiral blade 26 in the through-blocking component 2 is used to open and block the lower end opening of the discharge component 1, avoiding the phenomenon of blockage in the discharge component 1; at the same time, the collection component 4 is fixed on the mounting plate 5 by the first half ring 31 and the second half ring 35 in the clamp component 3, thereby strengthening the sealing performance at the silicon powder bag installation location and facilitating use; the gas containing silicon powder enters the exhaust component 6 through the connection component 8 and enters the filter 7 through the exhaust component 6. Under the action of the filter element 71 in the filter 7, the gas and the silicon powder are separated, and after separation, the silicon powder falls into the collection component 4 under the action of gravity, thereby realizing the recovery of silicon powder.

[0098] So far, the technical solutions of the present application have been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

[0099] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the content disclosed herein. The present application is not limited to the precise structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The present application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include the well-known common general knowledge or conventional technical means in the technical field not disclosed in the present application. The description and examples are only regarded as exemplary, and the scope of the present application is only limited by the appended claims.

Claims

1. A polysilicon reduction tail gas silicon powder discharge device, characterized in that: include: A discharge assembly (1) and a plugging assembly (2), wherein the plugging assembly (2) comprises: a fixed plate (21), a hand wheel (24), a rotating shaft (25) and a spiral blade (26), and a first through hole (22) is provided on the fixed plate (21); The upper end of the discharge assembly (1) is used to be connected to the taper discharge port (9), and the lower end is connected to the fixing plate (21); The lower end of the rotating shaft (25) is connected to the hand wheel (24), and the upper end is connected to the spiral blade (26), and passes through the fixed plate (21) through the first through hole (22), wherein the spiral blade (26) is located inside the discharge assembly.

2. The device according to claim 1, characterized in that The blocking-clearing assembly (2) further comprises: a plurality of connecting rods (23); The lower ends of the plurality of connecting rods (23) are fixedly connected to the upper surface of the fixing plate (21), and the upper ends are fixedly connected to the lower end of the discharge assembly (1).

3. The device according to claim 1, characterized in that The outer wall of the rotating shaft (25) is provided with an external thread, and the inner wall of the first through hole is provided with an internal thread; The external thread on the outer wall of the rotating shaft (25) is screwed together with the internal thread on the inner wall of the first through hole (22).

4. The device according to claim 1, characterized in that The device further comprises: a clamp assembly (3), a mounting plate (5) and a connecting assembly (8); a second through hole (12) is provided on the side wall of the discharge assembly (1), a third through hole (51) is provided on the mounting plate (5), and a collecting assembly (4) is sleeved on the outer side of the mounting plate; The clamp assembly (3) is arranged on the outside of the collecting assembly (4) and is used to make the collecting assembly (4) and the mounting plate (5) contact-connected. One end of the connecting component (8) is fixedly connected to the side wall of the discharge component (1) to wrap the second through hole (12), and the other end passes through the mounting plate (5) to the collection component (4) through the third through hole (51).

5. The device according to claim 4, characterized in that The clamp assembly (3) comprises: a first semicircular ring (31), a second semicircular ring (35) and a plurality of stud bolts (37); The front and rear end surfaces of the first semicircular ring (31) are fixedly connected to a first ear seat (32); and a fourth through hole (33) is provided on the outer wall of the first ear seat (32); The second ear seat (34) is fixedly connected to the front and rear end surfaces of the second semicircular ring (35), and a fifth through hole (36) is provided on the outer wall of the second ear seat (34); One end of the stud bolt (37) is threadedly connected to the fourth through hole (33), and the other end is threadedly connected to the fifth through hole (36).

6. The device according to claim 4, characterized in that The device further comprises: an exhaust assembly (6) and a filter (7); a sixth through hole (52) is provided on the mounting plate (5); The exhaust assembly (6) is arranged on the upper surface of the mounting plate (5); One end of the exhaust assembly (6) is fixedly connected to the upper surface of the mounting plate (5) to wrap the sixth through hole (52), and the other end is fixedly connected to the filter (7).

7. The device according to claim 6, characterized in that The filter (7) comprises: a filter element (71), a plurality of fastening bolts (73) and a plurality of mounting posts (74); a seventh through hole (72) is arranged around the surface of the filter element (71); the mounting posts (74) are fixedly connected to the front and rear ends of the inner walls on both sides of the filter (7); and a mounting hole (75) is arranged at one end of the mounting posts (74); The filter element (71) is fixedly connected to the inner side of the filter (7) via the mounting column (74); One end of the fastening bolt (73) is threadedly connected to the inner side of the seventh through hole (72), and the other end passes through the seventh through hole (72) and is threadedly connected to the inner side of the mounting hole (75).

8. The device according to claim 1, characterized in that The discharge assembly (1) comprises: at least two control valves (11); The control valve (11) is fixedly connected to the outer wall of the discharge assembly (1).

9. The device according to claim 4, characterized in that The connection assembly (8) comprises: a disc valve (81); The disc valve (81) is fixedly connected to the outer wall of the connecting assembly (8).

10. The device according to claim 1, characterized in that A plurality of inclined baffles (91) are arranged inside the conical portion discharge port (9); The inclined baffle (91) is fixedly connected to the inner side of the conical material discharge port (9), wherein the fixed inclination directions of two adjacent inclined baffles (91) are opposite.

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