Pipeline spray-washing device of polycrystalline silicon reactor
By using a spiral nozzle and inert gas displacement in a polycrystalline silicon reactor, sprayed atomized liquid droplets combine with silicon powder, thus solving the risk of dust explosion caused by floating silicon powder and achieving a safe and efficient cleaning effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-11
- Publication Date
- 2026-03-06
AI Technical Summary
In existing polycrystalline silicon reactors, silicon powder is prone to floating during the cleaning process, posing a risk of dust explosion. Furthermore, the cleaning process is not thorough, and safety and efficiency need to be improved.
The pipeline spraying device using a polycrystalline silicon reactor utilizes spiral nozzles and inert gas displacement to spray out tiny mist-like liquid droplets that combine with silicon powder, reducing resistance and accelerating sedimentation, thus creating a sealed environment to prevent explosion.
It effectively reduces the possibility of dust explosions, improves the safety and efficiency of cleaning, reduces labor costs, and achieves highly efficient automated cleaning.
Smart Images
Figure CN223970558U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machinery, and in particular to a pipeline spraying device for a polycrystalline silicon reactor. Background Technology
[0002] The existing method for cleaning the pipelines of polycrystalline silicon reactors involves placing the bell jar of the vapor deposition reactor after polycrystalline silicon growth on a support. Inside the support, there is a spraying device for cleaning the reactor and a rotating brush braking mechanism. The rotating brush and the spraying device are in contact with the inner wall of the reactor. When the spraying begins, the braking mechanism rotates, and the silicon powder on the inner wall of the reactor is cleaned by the combined action of the spraying and the rotating brush.
[0003] In the process of realizing this utility model, it was found that the existing technical solution placed the reactor on the support and did not form a sealed atmosphere. When the rotating brush cleaned the silicon powder on the inner wall of the reactor, if the silicon powder was not wetted by the spray liquid, the silicon powder would fall and float in the reactor and surrounding area. If it encountered a fire source, it would be very easy to form a dust explosion. Utility Model Content
[0004] In view of this, the present invention provides a pipe spraying device for polycrystalline silicon reactors, which can clean dust-like substances on the inner wall of the polycrystalline silicon reactor after operation. It can also be applied to cleaning other containers with dust adhering to their inner walls, or irregular parts inside the reactor, which can effectively reduce the possibility of dust explosion and greatly improve the safety of the cleaning process.
[0005] To achieve the above objectives, an embodiment of this utility model provides a pipe spraying device for a polycrystalline silicon reactor, comprising a centrifugal pump, a pipe, a flat end cap, an external threaded connector, and a spiral nozzle; wherein, one end of the pipe is connected to the centrifugal pump, and the other end of the pipe is provided with a flat end cap; and, the external threaded connector is welded to the pipe end with the flat end cap, and the spiral nozzle is screwed onto the external threaded connector; the spiral nozzle is provided with different cone angles for spraying at different angles; the pipe spraying device is internally sealed before use, and the internal control is replaced with an inert gas.
[0006] Optionally, it includes: multiple external threaded joints are respectively welded to the flat end cap and the outer wall of the pipe at a predetermined distance from the flat end cap.
[0007] Optionally, this includes screwing different sized spiral nozzles onto the external threaded connector.
[0008] Optionally, the pipe may be designed with bends.
[0009] Optionally, the spiral nozzle is designed as a stainless steel internal thread spiral nozzle, and the external thread connector is designed as a stainless steel external thread connector.
[0010] One embodiment of the above-mentioned utility model has the following advantages or beneficial effects: The pipeline spraying device for the polycrystalline silicon reactor provided by the utility model uses the shearing action of the spiral nozzle at the end of the pipeline to turn the sprayed alkaline solution under a certain pressure into tiny mist droplets. The alkaline solution sprayed out from the nozzle reduces the resistance coefficient. In addition, it can replace the air inside the reactor with an inert gas. The mist droplets combine with the silicon powder washed down from the inner wall of the reactor to accelerate the silicon powder falling into the alkaline solution, thus avoiding the silicon powder from exploding inside the sealed reactor.
[0011] The further effects of the aforementioned unconventional alternative methods will be explained below in conjunction with specific implementation methods. Attached Figure Description
[0012] The accompanying drawings are provided to better understand this utility model and do not constitute an undue limitation thereof. Wherein:
[0013] Figure 1 This is a schematic diagram of the pipe spraying device for a polycrystalline silicon reactor according to an embodiment of the present invention;
[0014] Figure 2 This is a schematic diagram of the structure of the mist-like liquid droplets according to an embodiment of the present invention. Detailed Implementation
[0015] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of the present invention, including various details to aid understanding. These embodiments should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.
[0016] At least one embodiment of this utility model provides a pipe spraying device for a polycrystalline silicon reactor, which is capable of fixing multiple spiral nozzles at the end of the pipe. For example... Figure 1 As shown, the pipe cleaning device for the polycrystalline silicon reactor may include a pipe 1, a flat end cap 2, a spiral nozzle 3, a centrifugal pump 4, and an external threaded connector 5. In an embodiment, one end of the pipe 1 is connected to the centrifugal pump 4, and the other end of the pipe 1 is provided with a flat end cap 2; and the external threaded connector 5 is welded to the end of the pipe 1 with the flat end cap 2, and the spiral nozzle 3 is screwed onto the external threaded connector 5.
[0017] In some preferred embodiments, the cone angle of the spiral nozzle 3 in the pipe spraying device of the polycrystalline silicon reactor described in this utility model can be adjusted according to actual usage requirements. Different cone angles result in different spray angles from the spiral nozzle 3. Preferably, spiral nozzles 3 of different sizes are screwed onto the external threaded connector 5.
[0018] In a preferred embodiment, the outlet pressure of the centrifugal pump 4, the dimensions of the pipe 1 and the spiral nozzle 3 can be adjusted according to the size of the reactor.
[0019] As a preferred embodiment of the present invention, the pipeline spraying device of the polycrystalline silicon reactor includes multiple external threaded joints 5, and the multiple external threaded joints 5 are respectively welded to the flat end cap 2 and the outer wall of the pipeline 1 at a predetermined distance from the flat end cap 2.
[0020] In a preferred embodiment, the external threaded connector 5 is welded to the flat end cap 2 and to the outer wall of the pipe 1 at a distance of 20cm from the flat end cap.
[0021] As other embodiments of this utility model, such as Figure 1 As shown, the pipe 1 of the pipe spraying device for the polycrystalline silicon reactor is designed with a bend. In a further embodiment, the spiral nozzle 3 is designed as a stainless steel internal thread spiral nozzle, and the external thread connector 5 is designed as a stainless steel external thread connector.
[0022] It is worth noting that before using the pipeline spraying device for the polycrystalline silicon reactor, the reactor interior is in a closed atmosphere, with the internal air replaced by an inert gas, reducing the possibility of silicon powder forming dust and causing an explosion in the reactor. Under the action of the centrifugal pump 4, the alkaline solution, after passing through the helical surface of the spiral nozzle 3 and undergoing tangential contact and collision, becomes tiny droplets (such as...). Figure 2 As shown in the diagram, the liquid droplets combine with the silicon powder after being sprayed out, allowing the silicon powder to fall rapidly. This process can transform highly viscous alkaline solutions into atomized droplets through a metal surface. The alkaline solution is sprayed from the spiral nozzle 3, reducing the drag coefficient. The atomized droplets increase the contact area between the alkaline solution and the silicon powder, accelerating the rate at which the silicon powder falls to the bottom of the reactor. It can also be used to clean irregular parts inside the reactor. The process is highly automated, with extremely low labor costs; for example, it can be completed by only one person.
[0023] It should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," etc., in this utility model can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0024] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A pipe spray washing apparatus for a polysilicon reactor, characterized by, The centrifugal pump, the pipe, the flat head, the external thread joint and the spiral nozzle are included. One end of the pipe is connected with the centrifugal pump, and the other end of the pipe is provided with the flat head. The external thread joint is welded on the pipe end with the flat head, and the spiral nozzle is screwed on the external thread joint. The spiral nozzle is provided with different taper angles for spraying out different angles.
2. A pipe jetting apparatus for a polysilicon reactor as defined in claim 1, wherein The pipe spray washing device is sealed inside before use, and the inside is controlled to be replaced with inert gas. The pipe spray washing device comprises:
3. The pipe jetting apparatus for a polysilicon reactor of claim 1, wherein, A plurality of external thread joints are welded on the flat head and the outer wall of the pipe with a preset length from the flat head. The pipe spray washing device comprises:
4. The pipe jetting apparatus for a polysilicon reactor of claim 1, wherein, Spiral nozzles with different sizes are screwed on the external thread joints. The pipe spray washing device comprises: The pipe is designed to have an angle.