Argon dust removal device to prevent spontaneous combustion of silicon powder

Abstract

The present application discloses an argon dust removal device capable of preventing spontaneous combustion of silicon powder, wherein the argon dust removal device capable of preventing spontaneous combustion of silicon powder comprises a device body and at least one spray assembly, the device body comprises a first separation body, an air inlet pipe and an air outlet pipe, the first separation body forms a separation chamber and a powder outlet passage connected thereto, the air inlet pipe introduces argon containing silicon powder into the separation chamber in a manner that one end thereof is tangential to the inner wall of the separation chamber and is inclined downward, the air outlet pipe is arranged at the first separation body and is connected to the separation chamber, the spray assembly comprises a powder inlet pipe, a powder inlet body and a spray component, the two ends of the channel formed by the powder inlet pipe are respectively connected to the powder outlet passage and the containing space formed by the powder inlet body to guide the silicon powder to the containing space, the spray component is arranged at the powder inlet body, and the spray component sprays liquid into the containing space to mix with the silicon powder to form a water-powder mixed slurry.

Description

Technical Field

[0001] The present application relates to the technical field of argon recovery, and in particular to an argon dust removal device capable of preventing silicon powder from spontaneously combusting. Background Art

[0002] With the development of science and technology, the demand for the production of monocrystalline silicon, as one of the main raw materials for silicon-based solar cell modules, has risen sharply. Typical monocrystalline silicon is extracted from raw silicon ingots by the Czochralski method under high temperature conditions above 1400°C. During the Czochralski process, a large amount of high-purity argon is used for atmosphere purge to ensure the quality of monocrystalline silicon. However, due to the increasing cost of producing argon in recent years, the purchase cost of argon has continued to rise. Therefore, after using argon for atmosphere purge, the argon needs to be recovered and purified so that the argon can be recycled.

[0003] Since the argon gas after the atmosphere purge contains a large amount of silicon powder, the silicon powder in the argon gas needs to be filtered during the process of recovering the argon gas.

[0004] In the prior art, argon gas containing silicon powder will pass through a pre-silicon powder filter to remove the silicon powder therein, and the silicon powder removed from the argon gas will be discharged to a collector through the pre-silicon powder filter. However, since the silicon powder in the collector is in a dry powder form, the silicon powder is prone to spontaneous combustion when workers are cleaning the collector, thereby threatening the workers' lives. Summary of the invention

[0005] In order to solve the above technical problems and achieve at least one advantage of the present application, the present application provides an argon dust removal device capable of preventing spontaneous combustion of silicon powder, wherein the argon dust removal device capable of preventing spontaneous combustion of silicon powder comprises:

[0006] The device body comprises a first separation body, an air inlet pipe and an air outlet pipe, the first separation body forms a separation chamber and a powder outlet channel connected to the separation chamber, the powder outlet channel forms a lower end portion located in the gravity direction of the first separation body, the air inlet pipe is arranged on the first separation body, the channel formed by the air inlet pipe is connected to the separation chamber, one end portion of the air inlet pipe is tangential to the inner wall of the separation chamber and is inclined downward, the channel formed by the air inlet pipe is used to introduce argon gas containing silicon powder into the separation chamber, the air outlet pipe is arranged at the higher end portion in the gravity direction of the first separation body, and the channel formed by the air outlet pipe is connected to the separation chamber;

[0007] At least one spray assembly, the spray assembly comprising a powder inlet pipe, a powder inlet body and a spray component, the powder inlet body forming a storage space, the two ends of the powder inlet pipe are respectively connected to the first separation body and the powder inlet body, and the two ends of the channel formed by the powder inlet pipe are respectively connected to the powder outlet channel and the storage space, so that the silicon powder in the powder outlet channel is guided to the storage space through the channel formed by the powder inlet pipe, and the spray component is arranged on the powder inlet body in a manner that it can spray liquid into the storage space, so that the liquid is mixed into the silicon powder in the storage space through the spray component to form a water-powder mixed slurry.

[0008] According to one embodiment of the present application, the separation chamber is defined as a high-end space at the point where it is connected to the channel formed by the air outlet pipe, and the separation chamber is defined as a low-end space at the point where it is connected to the powder outlet channel, the cross-sectional size of the inner wall of the separation chamber at the low-end space gradually decreases from top to bottom, and the powder outlet channel is connected to the minimum cross-sectional size of the low-end space.

[0009] According to an embodiment of the present application, the spray assembly further includes a powder inlet on-off piece, which is disposed on the powder inlet pipeline and is used to control the on-off of a channel formed by the powder inlet pipeline.

[0010] According to an embodiment of the present application, the spray assembly is implemented as two, the two powder inlet bodies form the accommodating space, one end of the two powder inlet pipes are respectively connected to the first separation body, and one end of the two powder inlet pipes forming a channel are respectively connected to the powder outlet channel, the other end of the two powder inlet pipes are respectively connected to one of the powder inlet bodies, and the other end of the two powder inlet pipes forming a channel are respectively connected to the accommodating space of one of the powder inlet bodies, the two spray components are respectively arranged in the accommodating space of the two powder inlet bodies, and the two powder inlet on-off parts are respectively arranged in the two powder inlet pipes in a manner that can control the on-off of the channel formed by the powder inlet pipes.

[0011] According to one embodiment of the present application, the spray component includes at least one liquid inlet pipeline, at least one spray pipe group and a plurality of liquid spray parts, the liquid inlet pipeline is used to be passed with liquid, the spray pipe group is arranged in the accommodating space, one end of the liquid inlet pipeline is connected to the spray pipe group, and one end of the channel formed by the liquid inlet pipeline is connected to the channel formed by the spray pipe group, so that the liquid is passed into the channel formed by the spray pipe group through the channel formed by the liquid inlet pipeline, and a plurality of liquid spray parts are arranged in the spray pipe group, so that the liquid in the channel formed by the spray pipe group is sprayed into the silicon powder in the accommodating space through the liquid spray parts to form a water-powder mixed slurry, the powder inlet body also forms a slurry outlet channel connected to the accommodating space, the slurry outlet channel is formed at the lower end of the powder inlet body, and the slurry outlet channel is used to pass the water-powder mixed slurry.

[0012] According to an embodiment of the present application, the spray component also includes a liquid spray on-off component, which is arranged on the liquid inlet pipeline, and the liquid spray on-off component is used to adjust the flow rate of liquid entering the channel formed by the liquid inlet pipeline into the channel formed by the spray pipe group. The powder inlet body forms at least one spray window, and the spray window is connected to the containing space so that the viscosity of the water-powder mixture in the containing space can be observed through the spray window.

[0013] According to one embodiment of the present application, the spray component also includes at least one slurry passing pipeline and at least one slurry passing on-off piece corresponding to the slurry passing pipeline, the two ends of the slurry passing pipeline are respectively connected to the liquid inlet pipeline and the powder inlet body, and the channel formed by the liquid inlet pipeline is connected to the slurry outlet channel through the channel formed by the slurry passing pipeline, the slurry passing on-off piece is arranged on the slurry passing pipeline, and the slurry passing on-off piece is used to control the on-off of the channel formed by the slurry passing pipeline.

[0014] According to one embodiment of the present application, the argon dust removal device capable of preventing silicon powder from self-igniting further comprises a second gas-powder separation assembly, the second gas-powder separation assembly comprising a mounting partition and at least two groups of powder filter members, the mounting partition being arranged in the separation chamber of the first separation body, and the mounting partition being arranged between the low-end space and the high-end space of the separation chamber, each group of the powder filter members comprising at least two powder filter bodies, one end of each of the powder filter bodies of each group of the powder filter members being arranged in the mounting partition, and each of the powder filter bodies protruding toward the high-end space, and the powder filter bodies having a powder filter The powder filter space is connected with the low-end space, and the powder filter space is connected with the high-end space through the powder filter holes. The powder filter body is used to intercept dust in the argon gas flowing from the low-end space to the high-end space. Each group of the powder filter parts also includes at least two powder filter covers matching the inner diameters of at least two powder filter spaces. At least two powder filter covers are respectively arranged at one end of at least two powder filter bodies away from the mounting partition, and at least two powder filter covers are respectively used to close one end of at least two powder filter spaces away from the mounting partition.

[0015] According to one embodiment of the present application, the argon dust removal device capable of preventing spontaneous combustion of silicon powder further includes a backflush assembly, the backflush assembly including a backflush main pipe, at least two backflush branch pipes corresponding to at least two groups of filter powder components, and at least two groups of backflush connecting pipe groups corresponding to at least two backflush branch pipes. The backflush main pipe is used to be introduced with argon gas, one end of each of the backflush branch pipes is respectively connected to the backflush main pipe, each group of the backflush connecting pipe groups includes at least two gas branch pipes corresponding to at least two filter powder caps, and each group of the backflush connecting pipe groups includes at least two gas branch pipes corresponding to at least two filter powder caps. One end of each of the air distribution pipes is connected to an end of a back-blowing branch pipe away from the back-blowing main pipe, and the other end of each of the air distribution pipes in each group of the back-blowing connecting pipe groups is directed toward one of the filter powder elements, respectively. The back-blowing assembly also includes back-blowing nozzles corresponding to at least two filter powder covers of at least two groups of filter powder elements, each of the back-blowing nozzles is arranged at an end of an air distribution pipe away from the back-blowing branch pipe, and each of the back-blowing nozzles penetrates one of the filter powder covers and extends into the filter powder space.

[0016] According to one embodiment of the present application, the backblowing assembly also includes at least two backblowing on-off parts corresponding to at least two backblowing branch pipes, the backblowing on-off parts are arranged on the backblowing branch pipes, and the backblowing on-off parts are used to control the on and off of the flow of argon gas in the backblowing branch pipes. The second gas-powder separation assembly also includes a powder gathering component, the powder gathering component includes a powder gathering component and a powder guiding pipe, the powder gathering component is connected to the mounting partition, and the powder gathering component is arranged in the lower end space of the separation chamber, the powder gathering component forms an air passage space and a plurality of air passage holes connected to the powder filter space, the air passage space is connected to the lower end space of the separation chamber through the plurality of air passage holes, the cross-sectional size of the powder gathering component gradually decreases from the position close to the mounting partition to the position far away from the mounting partition, and forms a convergence port, one end of the channel formed by the powder guiding pipe is connected to the convergence port, and the other end of the channel formed by the powder guiding pipe is connected to the accommodating space of one of the powder inlet bodies.

[0017] The beneficial effects of this application include:

[0018] 1. Since one end of the air inlet pipe is tangential to the inner wall of the separation chamber and inclined downward, when the argon gas containing silicon powder is introduced into the separation chamber through the channel formed by the air inlet pipe, the argon gas containing silicon powder will make a spiral motion downward along the inner wall of the separation chamber. Since the weight of the silicon powder is greater than the weight of the argon gas, the silicon powder in the argon gas will be thrown toward and hit the inner wall of the separation chamber under the action of a large centrifugal force, and then the silicon powder in the argon gas will fall into the powder outlet channel and enter the containing space under the action of gravity after losing kinetic energy, so as to achieve the purpose of quickly separating the silicon powder from the argon gas.

[0019] 2. Liquid is mixed with the silicon powder entering the containing space through the spraying member to form a water-gouache mixed slurry, so as to avoid spontaneous combustion of silicon powder when workers take out the silicon powder made into the water-gouache mixed slurry from the containing space, thereby ensuring the life safety of the workers.

[0020] 3. Due to the setting of the two spray assemblies, it is only necessary to alternately control one of the powder inlet switches to alternately block the silicon powder from entering one of the storage spaces through the channel formed by one of the powder inlet pipes, so as to achieve the purpose of sequentially cleaning the water-powder mixed slurry made of silicon powder in the storage spaces of the two powder inlet bodies. At the same time, since the two powder inlet switches are alternately opened, the silicon powder can continuously pass through the powder outlet channel to prevent excessive accumulation and spontaneous combustion of the silicon powder, so as to support the continuous filtration of the argon gas containing the silicon powder.

[0021] 4. Liquid is sprayed from the slurry passage to the slurry outlet channel, so as to prevent the water-powder mixed slurry made of silicon powder from sticking to the slurry outlet channel and being unable to be discharged, thereby increasing the smoothness of the water-powder mixed slurry when being discharged through the slurry outlet channel.

[0022] 5. At least two groups of the powder filter elements can intercept a small amount of silicon powder in the argon gas flowing from the low-end space to the high-end space, so as to further filter the silicon powder in the argon gas.

[0023] 6. The back-blowing component can alternately blow argon into the powder filter space of each group of the powder filter elements to blow off the silicon powder on the inner wall of the powder filter space of each group of the powder filter elements, thereby preventing excessive accumulation of silicon powder in the powder filter space from hindering each group of the powder filter elements from retaining a small amount of silicon powder in the argon flowing from the low-end space to the high-end space. At the same time, the method of alternately blowing argon into each group of the powder filter elements can prevent the argon flowing from the low-end space to the high-end space from being hindered from entering the powder filter space due to the blowing of argon into the powder filter elements, thereby supporting continuous filtration of silicon powder.

[0024] 7. Since the argon gas falling into the lower end space of the separation chamber continuously enters the gas passage space through a plurality of the gas passage holes, the silicon powder on the inner wall of the powder filter space cannot enter the lower end space of the separation chamber through the gas passage holes after falling into the gas passage space, so that the silicon powder can directly fall into the powder inlet body after being gathered at the gathering port to form a water-powder mixed slurry. At the same time, due to the obstruction of the powder gathering component, the speed of the argon gas flowing from the lower end space to the high end space is reduced, so as to reduce the situation where the silicon powder is again carried to the powder filter space by the argon gas and cannot fall. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic perspective view of a preferred embodiment of the present application is shown.

[0026] Figure 2 A cross-sectional schematic diagram of a preferred embodiment of the present application is shown.

[0027] Figure 3 Shows Figure 2 Schematic diagram of the enlarged view of point A in the middle.

[0028] Figure 4 Shows Figure 2 Schematic diagram of the enlarged view of point B in the middle.

[0029] Figure 5 A schematic three-dimensional diagram of the second gas-powder separation component and the backflush component in a preferred embodiment of the present application is shown.

[0030] Figure 6 Shows Figure 5 Schematic diagram of the enlarged view of point C in the middle.

[0031] Figure 7 Shows Figure 5A schematic cross-sectional view of the second gas-powder separation component and the backflush component.

[0032] Figure 8 Shows Figure 7 Schematic diagram of the enlarged view of point D in the middle.

[0033] Reference numerals:

[0034] 10. Device body;

[0035] 11. First separation body; 1101. Separation chamber; 1102. Powder outlet channel; 1103. Powder filter window; 12. Air inlet pipe; 13. Air outlet pipe; 14. Powder outlet switch;

[0036] 20. Spray assembly;

[0037] 21. Powder inlet pipeline; 22. Powder inlet body; 2201. Accommodation space; 2202. Slurry outlet channel; 2203. Spray window; 23. Spray component; 231. Liquid inlet pipeline; 232. Spray pipe group; 233. Liquid spraying part; 234. Liquid spraying switch; 235. Slurry pipeline; 236. Slurry switch; 24. Powder inlet switch; 25. Slurry outlet switch;

[0038] 30. A second gas-powder separation component;

[0039] 31. Installing partition; 32. Powder filter; 321. Powder filter body; 32101. Powder filter space; 32102. Powder filter hole; 322. Powder filter cover; 33. Powder gathering component; 331. Powder gathering component; 33101. Air passage space; 33102. Air passage hole; 33103. Converging port; 332. Powder guide pipe; 33201. Powder guide window;

[0040] 40. Backflush assembly;

[0041] 41. Back-blowing main pipe; 42. Back-blowing branch pipe; 43. Back-blowing connecting pipe group; gas branch pipe; 44. Back-blowing nozzle; 45. Back-blowing switch;

[0042] 50. Air bleed parts. DETAILED DESCRIPTION

[0043] The following description is used to disclose the present application so that those skilled in the art can implement the present application. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present application defined in the following description can be applied to other embodiments, variations, improvements, equivalent solutions, and other technical solutions that do not deviate from the spirit and scope of the present application.

[0044] Those skilled in the art should understand that, in the disclosure of the present application, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present application.

[0045] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0046] refer to Figures 1 to 8 According to a preferred embodiment of the present application, an argon dust removal device capable of preventing silicon powder from spontaneously combusting will be described in detail below, wherein the argon dust removal device capable of preventing silicon powder from spontaneously combusting comprises a device body 10 and at least one spray assembly 20.

[0047] Specifically, the device body 10 includes a first separation body 11, an air inlet pipe 12 and an air outlet pipe 13. The first separation body 11 forms a separation chamber 1101 and a powder outlet channel 1102 connected to the separation chamber 1101. The powder outlet channel 1102 forms a lower end portion located in the gravity direction of the first separation body 11. The air inlet pipe 12 is arranged on the first separation body 11, and the channel formed by the air inlet pipe 12 is connected to the separation chamber 1101. One end of the air inlet pipe 12 is tangential to the inner wall of the separation chamber 1101 and tilted downward, so that the argon gas containing silicon powder is introduced into the separation chamber 1101 in a manner of tangentially to the inner wall of the separation chamber 1101 and tilted downward through the channel formed by the air inlet pipe 12. The air outlet pipe 13 is arranged at the upper end portion of the first separation body 11 in the gravity direction, and the channel formed by the air outlet pipe 13 is connected to the separation chamber 1101.

[0048] It is understandable that, since one end of the air inlet pipe 12 is tangential to the inner wall of the separation chamber 1101 and tilted downward, when the argon gas containing silicon powder is introduced into the separation chamber 1101 through the channel formed by the air inlet pipe 12, the argon gas containing silicon powder will make a spiral motion downward along the inner wall of the separation chamber 1101. Since the weight of silicon powder is greater than the weight of argon gas, the silicon powder in the argon gas will be thrown toward and hit the inner wall of the separation chamber 1101 under the action of a large centrifugal force, and the silicon powder will lose kinetic energy due to hitting the inner wall of the separation chamber 1101, and will fall into the powder outlet channel 1102 under the action of gravity, thereby achieving the separation of silicon powder and argon gas.

[0049] The separation chamber 1101 is defined as a high-end space at the place where it is connected to the channel formed by the gas outlet pipe 13, and the separation chamber 1101 is defined as a low-end space at the place where it is connected to the powder outlet channel 1102. That is to say, the channel formed by the gas outlet pipe 13 is connected to the high-end space. According to fluid mechanics, after the argon gas makes a spiral motion downward along the inner wall of the separation chamber 1101, the argon gas will gather at the low-end space of the separation chamber 1101 and reduce the spiral radius to make a spiral motion upward, and enter the channel formed by the gas outlet pipe 13 from the high-end space to be discharged from the channel formed by the gas outlet pipe 13.

[0050] The spray assembly 20 includes a powder inlet pipe 21, a powder inlet body 22 and a spray component 23. The powder inlet body 22 forms a storage space 2201. The two ends of the powder inlet pipe 21 are respectively connected to the first separation body 11 and the powder inlet body 22, and the two ends of the channel formed by the powder inlet pipe 21 are respectively connected to the powder outlet channel 1102 and the storage space 2201, so as to guide the silicon powder in the powder outlet channel 1102 to the storage space 2201 through the channel formed by the powder inlet pipe 21. The spray component 23 is arranged on the powder inlet body 22 in a manner that liquid can be sprayed into the storage space 2201, so that the liquid is mixed into the silicon powder in the storage space 2201 through the spray component 23 to form a water-powder mixed slurry.

[0051] It is worth mentioning that after the silicon powder enters the containing space 2201, it is mixed with liquid to make a water-gouache mixed slurry, so that when workers take out the silicon powder made into a water-gouache mixed slurry from the containing space 2201, spontaneous combustion of the silicon powder is avoided, thereby ensuring the life safety of the workers.

[0052] Preferably, the cross-sectional dimension of the inner wall at the lower end space of the separation chamber 1101 gradually decreases from top to bottom, and the powder outlet channel 1102 is connected to the minimum cross-sectional dimension of the lower end space, so that when the silicon powder loses kinetic energy due to colliding with the inner wall of the separation chamber 1101 and falls toward the powder outlet channel 1102 under the action of gravity, the silicon powder can converge into the powder outlet channel 1102 along the inner wall of the lower end space of the separation chamber 1101, thereby making the process of the silicon powder entering the powder outlet channel 1102 smoother.

[0053] Preferably, the spray assembly 20 further includes a powder inlet switch 24. The powder inlet switch 24 is disposed on the powder inlet pipe 21, and is used to control the on-off of the channel formed by the powder inlet pipe 21, so as to facilitate cleaning of the water-powder mixed slurry in the containing space 2201 after controlling the powder inlet switch 24 to block the silicon powder from entering the containing space 2201 through the channel formed by the powder inlet pipe 21.

[0054] In this embodiment, the spray assembly 20 is implemented as two. The two powder inlet bodies 22 both form the accommodation space 2201. One end of the two powder inlet pipes 21 are respectively connected to the first separation body 11, and one end of the two powder inlet pipes 21 forming a channel is respectively connected to the powder outlet channel 1102. The other end of the two powder inlet pipes 21 is respectively connected to one powder inlet body 22, and the other end of the two powder inlet pipes 21 forming a channel is respectively connected to the accommodation space 2201 of one powder inlet body 22. The two spray components 23 are respectively arranged in the accommodation space 2201 of the two powder inlet bodies 22 in a manner that can spray liquid into the accommodation space 2201 and make the silicon powder in the accommodation space 2201 into a water-powder mixed slurry. The two powder inlet on-off parts 24 are respectively arranged in the two powder inlet pipes 21 in a manner that can control the on-off of the channel formed by the powder inlet pipes 21.

[0055] Thus, when it is necessary to clean the water-powder mixed slurry in the accommodation space 2201 of one of the powder inlet bodies 22, it is only necessary to control one of the powder inlet switching pieces 24 to block the silicon powder from entering one of the accommodation spaces 2201 through the channel formed by one of the powder inlet pipes 21, so as to clean the accommodation space 2201 of one of the powder inlet bodies 22. At the same time, since the other powder inlet switching piece 24 provided in the other powder inlet pipe 21 does not block the silicon powder from entering the accommodation space 2201 of the other powder inlet body 22 through the channel formed by the other powder inlet pipe 21, the silicon powder in the powder outlet channel 1102 can continuously pass through the powder outlet channel 1102, so as to support the continuous filtration of the argon gas containing the silicon powder.

[0056] That is to say, the two powder inlet switching pieces 24 can be controlled to control the on-off of the channel formed by the two powder inlet pipes 21, so that the silicon powder passing through the powder outlet channel 1102 can alternately pass through the channel formed by the two powder inlet pipes 21 to enter the two containing spaces 2201 respectively, and then the water-powder mixed slurry made of silicon powder in one of the containing spaces 2201 can be cleaned.

[0057] Preferably, the powder inlet switching element 24 is implemented to include a solenoid valve.

[0058] Preferably, the spraying member 23 comprises at least one liquid inlet pipeline 231, at least one spray pipe group 232 and a plurality of liquid spraying parts 233. The liquid inlet pipeline 231 is used to be passed with liquid. The spray pipe group 232 is arranged in the accommodating space 2201. One end of the liquid inlet pipeline 231 is connected to the spray pipe group 232, and one end of the channel formed by the liquid inlet pipeline 231 is connected to the channel formed by the spray pipe group 232, so that the liquid is passed into the channel formed by the spray pipe group 232 through the channel formed by the liquid inlet pipeline 231. A plurality of liquid spraying parts 233 are arranged in the spray pipe group 232, so that the liquid in the channel formed by the spray pipe group 232 is sprayed into the silicon powder in the accommodating space 2201 through the liquid spraying parts 233, so as to form a water-gouache mixed slurry.

[0059] Preferably, the spray pipe group 232 is implemented in an annular shape, and a plurality of the liquid spraying parts 233 are arranged on the spray pipe group 232 along the circumferential direction around the annular center of the spray pipe group 232. The end of the powder inlet pipe 21 close to the powder inlet body 22 is located above the annular center of the spray pipe group 232, so that silicon powder is passed from the annular center of the spray pipe group 232 into the accommodation space 2201 through the channel formed by the powder inlet pipe 21, and then in the process of silicon powder entering the accommodation space 2201 through the channel formed by the powder inlet pipe 21, the liquid sprayed from the liquid spraying parts 233 directly contacts the silicon powder to directly form a water-gouache mixed slurry, so that the water-gouache mixed slurry falls directly to the lower end of the accommodation space 2201 in the gravity direction under the action of gravity.

[0060] Among them, since the silicon powder is passed into the containing space 2201 from the annular center of the spray pipe group 232 through the channel formed by the powder inlet pipe 21, the situation where the silicon powder cannot be fully mixed into the liquid due to sticking and accumulating on the inner wall of the containing space 2201 can be reduced, and the situation where the water-powder mixed slurry cannot fall due to sticking to the inner wall of the containing space 2201 can be reduced.

[0061] As an example, the liquid that is introduced into the liquid inlet pipeline 231 and sprayed from the plurality of liquid spraying members 233 into the containing space 2201 through the spray pipe group 232 is water.

[0062] Preferably, the liquid spraying member 233 is implemented to include a nozzle. The plurality of liquid spraying members 233 are all inclined toward the center of the annular structure of the spray pipe group 232 .

[0063] Preferably, the powder inlet body 22 further forms a slurry outlet channel 2202 communicating with the accommodating space 2201. The slurry outlet channel 2202 is formed at the lower end of the powder inlet body 22, and the slurry outlet channel 2202 is used to pass the water-gouache mixed slurry.

[0064] That is to say, when the gouache mixture in the containing space 2201 gathers at the lower end of the containing space 2201 in the gravity direction due to gravity, the gouache mixture can flow out of the containing space 2201 through the slurry outlet channel 2202.

[0065] Preferably, the cross-sectional size of the inner wall of the accommodating space 2201 gradually decreases from a position away from the slurry outlet channel 2202 to a position close to the slurry outlet channel 2202, so that the water-powder mixed slurry in the accommodating space 2201 converges into the slurry outlet channel 2202 under the action of gravity.

[0066] Preferably, the spray assembly 20 further includes a slurry discharge switch 25. The slurry discharge switch 25 is disposed on the powder inlet body 22, and the slurry discharge switch 25 is used to control the discharge of the slurry discharge channel 2202, so as to control the discharge of the water-gouache mixed slurry in the containing space 2201 through the slurry discharge channel 2202 according to actual use conditions.

[0067] Preferably, the slurry discharge switch 25 is implemented to include a solenoid valve.

[0068] Preferably, the spray component 23 also includes a liquid spray on-off component 234, which is arranged on the liquid inlet pipeline 231. The liquid spray on-off component 234 is used to adjust the flow rate of liquid entering the channel formed by the liquid inlet pipeline 231 into the channel formed by the spray pipe group 232, and then adjust the flow rate of liquid sprayed from the multiple liquid spray components 233 into the containing space 2201, so that the viscosity of the water-powder mixture in the containing space 2201 is in an expected state.

[0069] The powder inlet body 22 forms at least one spray window 2203. The spray window 2203 is in communication with the receiving space 2201, so that the viscosity of the gouache mixture in the receiving space 2201 can be observed through the spray window 2203, and the flow rate of the liquid introduced into the channel formed by the liquid inlet pipeline 231 into the channel formed by the spray pipe group 232 can be timely adjusted through the liquid spraying switch 234 to avoid the viscosity of the gouache mixture in the receiving space 2201.

[0070] For example, when the gouache mixture in the containing space 2201 is too viscous, the gouache mixture will not be able to pass through the gouache outlet channel 2202 smoothly due to sticking to the inner wall of the gouache outlet channel 2202, and thus the gouache mixture in the containing space 2201 cannot be discharged through the gouache outlet channel 2202. When the gouache mixture in the containing space 2201 is too thin, the thin gouache mixture will easily fill the space in the containing space 2201, and thus the gouache mixture in the containing space 2201 needs to be frequently discharged through the gouache outlet channel 2202, and at the same time, the thin gouache mixture will cause waste of liquid.

[0071] Preferably, the liquid spray on-off component 234 is implemented to include a flow control valve.

[0072] Preferably, the spraying member 23 further includes at least one slurry passage pipeline 235 and at least one slurry passage on-off member 236 corresponding to the slurry passage pipeline 235. The two ends of the slurry passage pipeline 235 are respectively connected to the liquid inlet pipeline 231 and the powder inlet body 22, and the channel formed by the liquid inlet pipeline 231 is connected to the slurry outlet channel 2202 through the channel formed by the slurry passage pipeline 235. The slurry passage on-off member 236 is provided on the slurry passage pipeline 235, and the slurry passage on-off member 236 is used to control the on-off of the channel formed by the slurry passage pipeline 235.

[0073] It is understandable that when the gouache mixed slurry cannot be discharged through the gouache mixed slurry channel 2202 due to being adhered to the inner wall of the gouache mixed slurry channel 2202, the gouache mixed slurry can be discharged through the gouache mixed slurry channel 2202 by controlling the gouache mixed slurry on-off member 236 to allow the liquid to flow into the gouache mixed slurry channel 2202 through the channel formed by the gouache mixed slurry channel 235, so as to increase the smoothness of the gouache mixed slurry when being discharged through the gouache mixed slurry channel 2202. At the same time, when the liquid enters the gouache mixed slurry channel 2202 through the channel formed by the gouache mixed slurry channel 235, the liquid can also flush the inner wall of the gouache mixed slurry channel 2202, so as to flush and drop the gouache mixed slurry adhered to the inner wall of the gouache mixed slurry channel 2202, thereby preventing the gouache mixed slurry containing silicon powder from being unable to be discharged due to partial adhesion to the inner wall of the gouache mixed slurry channel 2202, thereby avoiding the waste of silicon powder.

[0074] It should be noted that when the argon gas gathers from the lower end space of the separation chamber 1101 and moves upward in a spiral motion with a decreasing spiral radius, a small amount of silicon powder in the bottom end space will be driven by the argon gas to flow toward the high end space of the separation chamber 1101.

[0075] In this embodiment, the argon dust removal device capable of preventing silicon powder from self-igniting further comprises a second gas-powder separation assembly 30. The second gas-powder separation assembly 30 comprises a mounting partition 31 and at least two groups of filter powder members 32. The mounting partition 31 is arranged in the separation chamber 1101 of the first separation body 11, and the mounting partition 31 is arranged between the low-end space and the high-end space of the separation chamber 1101. Each group of the filter powder members 32 comprises at least two filter powder bodies 321, and one end of each filter powder body 321 of each group of the filter powder members 32 is arranged in the mounting partition 31, and each filter powder body 321 protrudes toward the high-end space. The filter powder body 321 has a filter powder space 32101 and a plurality of filter powder holes 32102. The filter powder space 32101 is connected to the low-end space, and the filter powder space 32101 is connected to the high-end space through a plurality of filter powder holes 32102. The powder filter body 321 is used to intercept dust in the argon gas flowing from the low-end space to the high-end space.

[0076] Each group of the powder filter elements 32 further includes at least two powder filter covers 322 that match the inner diameters of at least two powder filter spaces 32101. The at least two powder filter covers 322 are respectively disposed at one end of at least two powder filter bodies 321 away from the mounting partition 31, and the at least two powder filter covers 322 are respectively used to close one end of at least two powder filter spaces 32101 away from the mounting partition 31.

[0077] As an example, when argon gas containing a small amount of silicon powder gathers from the lower end space of the separation chamber 1101 and makes a spiral motion upward in a manner of reducing the spiral radius, the argon gas containing a small amount of silicon powder will enter the powder filter space 32101 from the lower end space of the separation chamber 1101. At the same time, when the argon gas passes through several of the powder filter holes 32102, a small amount of silicon powder contained in the argon gas will be retained on the inner wall of the powder filter space 32101, so that the argon gas without silicon powder enters the high end space of the separation chamber 1101 and enters the channel formed by the gas outlet pipe 13, so as to be discharged from the channel formed by the gas outlet pipe 13.

[0078] When too much silicon powder is trapped on the inner wall of the powder filter space 32101 , it will partially block the powder filter holes 32102 , thereby preventing the argon gas without silicon powder from smoothly entering the high-end space of the separation chamber 1101 .

[0079] Preferably, the argon dust removal device capable of preventing spontaneous combustion of silicon powder further comprises a back-blowing assembly 40. The back-blowing assembly 40 comprises a back-blowing main pipe 41, at least two back-blowing branch pipes 42 corresponding to at least two groups of filter powder elements 32, and at least two groups of back-blowing connecting pipe groups 43 corresponding to at least two back-blowing branch pipes 42. The back-blowing main pipe 41 is used to be introduced with argon gas. One end of each of the back-blowing branch pipes 42 is respectively connected to the back-blowing main pipe 41. Each group of the back-blowing connecting pipe groups 43 comprises at least two gas branch pipes corresponding to at least two filter powder covers 322. One end of each of the gas branch pipes in each group of the back-blowing connecting pipe groups 43 is connected to one end of a back-blowing branch pipe 42 away from the back-blowing main pipe 41. The other end of each of the gas branch pipes in each group of the back-blowing connecting pipe groups 43 is respectively directed toward one of the filter powder elements 32. The back-blowing assembly 40 further includes a back-blowing nozzle 44 corresponding to at least two filter powder caps 322 of at least two groups of filter powder elements 32. Each of the back-blowing nozzles 44 is disposed at an end of one of the air distribution pipes away from the back-blowing branch pipe 42, and each of the back-blowing nozzles 44 penetrates one of the filter powder caps 322 and extends into the filter powder space 32101.

[0080] It can be understood that when there is too much silicon powder on the inner wall of the powder filter space 32101, the argon gas will enter the at least two backblowing branch pipes 42 through the backblowing main pipe 41, and pass through the at least two gas branch pipes of each group of the backblowing connecting pipe group 43 from the at least two backblowing branch pipes 42 to be sprayed into the powder filter space 32101 through the backblowing nozzle 44, so that the silicon powder on the inner wall of each powder filter space 32101 will be brought to the lower end space of the separation chamber 1101 under the drive of the argon gas, and fall into the powder outlet channel 1102.

[0081] Preferably, the backflush assembly 40 further includes at least two backflush on-off members 45 corresponding to at least two backflush branch pipes 42. The backflush on-off members 45 are disposed in the backflush branch pipes 42, and are used to control the on-off of argon gas flow in the backflush branch pipes 42.

[0082] As an example, by controlling one of the back-blowing on-off components 45 to allow argon to enter the corresponding at least two gas distribution pipes through different back-blowing branch pipes 42, and allowing argon to pass through the back-blowing nozzles 44 connected to the gas distribution pipes to be sprayed into at least two filter powder spaces 32101 of different groups of filter powder elements 32, the silicon powder on the inner walls of at least two filter powder spaces 32101 of different groups of filter powder elements 32 can be cleaned.

[0083] Among them, by controlling one of the back-blowing on-off components 45 and passing argon gas into at least two of the powder filter spaces 32101 of one group of the powder filter elements 32, in the process of blowing off the silicon powder on the inner wall of the powder filter space 32101 by argon gas, the at least two powder filter spaces 32101 here will be unable to smoothly enter the argon gas containing a small amount of silicon powder in the lower end space of the separation chamber 1101 into the at least two powder filter spaces 32101 due to the introduction of argon gas. However, it is worth mentioning that since the other backflush on-off component 45 is not controlled, the argon gas in the other backflush branch pipe 42 cannot circulate, and thus at least two of the filter powder spaces 32101 of the other group of filter powder elements 32 are still available for the argon gas containing a small amount of silicon powder in the lower end space of the separation chamber 1101 to enter. The small amount of silicon powder contained in the argon gas will still be retained on the inner wall of at least two of the filter powder spaces 32101 of the other group of filter powder elements 32, so that the argon gas without silicon powder can enter the high end space of the separation chamber 1101 and enter the channel formed by the outlet pipe 13 through the multiple filter powder holes 32102 of the other group of filter powder elements 32, so as to be discharged from the channel formed by the outlet pipe 13.

[0084] That is to say, the provision of at least two back-flush on-off components 45 allows argon gas to be introduced into at least two of the powder filter spaces 32101 of each group of the powder filter elements 32 in batches to blow off the silicon powder on the inner wall of the powder filter space 32101. At the same time, it does not prevent the argon gas containing a small amount of silicon powder in the lower-end space of the separation chamber 1101 from entering at least two of the powder filter spaces 32101 of another group of the powder filter elements 32, so that the high-end space of the separation chamber 1101 can be continuously introduced with argon gas after filtering silicon powder, so that the argon dust removal device that can prevent spontaneous combustion of silicon powder can work continuously.

[0085] In another variant embodiment, the argon dust removal device capable of preventing silicon powder from self-igniting further comprises a second gas-powder separation assembly 30. The second gas-powder separation assembly 30 comprises a mounting partition 31 and at least one powder filter 32. The mounting partition 31 is disposed in the separation chamber 1101 of the first separation body 11, and the mounting partition 31 is disposed between the low-end space and the high-end space of the separation chamber 1101. The powder filter 32 comprises a powder filter body 321 and a powder filter cover 322. One end of the powder filter body 321 is disposed in the mounting partition 31, and the powder filter body 321 protrudes toward the high-end space. The powder filter body 321 has a powder filter space 32101 and a plurality of powder filter holes 32102. The powder filter space 32101 is connected to the low-end space, and the powder filter space 32101 is connected to the high-end space through a plurality of the powder filter holes 32102. The powder filter body 321 is used to intercept dust in the argon gas flowing from the low-end space to the high-end space. The powder filter cover 322 matches the inner diameter of the powder filter space 32101, and the powder filter cover 322 is arranged at one end of the powder filter body 321 away from the installation partition 31 in a manner that can close one end of the powder filter space 32101 away from the installation partition 31.

[0086] As an example, when argon gas containing a small amount of silicon powder gathers from the lower end space of the separation chamber 1101 and makes a spiral motion upward in a manner of reducing the spiral radius, the argon gas containing a small amount of silicon powder will enter the powder filter space 32101 from the lower end space of the separation chamber 1101. At the same time, when the argon gas passes through several of the powder filter holes 32102, a small amount of silicon powder contained in the argon gas will be retained on the inner wall of the powder filter space 32101, so that the argon gas without silicon powder enters the high end space of the separation chamber 1101 and enters the channel formed by the gas outlet pipe 13, so as to be discharged from the channel formed by the gas outlet pipe 13.

[0087] When too much silicon powder is trapped on the inner wall of the powder filter space 32101 , it will partially block the powder filter holes 32102 , thereby preventing the argon gas without silicon powder from smoothly entering the high-end space of the separation chamber 1101 .

[0088] Preferably, the argon dust removal device capable of preventing spontaneous combustion of silicon powder further comprises a back-blowing assembly 40. The back-blowing assembly 40 comprises a back-blowing main pipe 41 and a back-blowing nozzle 44. The back-blowing main pipe 41 is used to be introduced with argon gas. The back-blowing nozzle 44 is arranged on the back-blowing main pipe 41, and the back-blowing nozzle 44 penetrates the filter powder cover 322 and extends into the filter powder space 32101.

[0089] It can be understood that when there is too much silicon powder on the inner wall of the powder filter space 32101, argon gas will be sprayed into the powder filter space 32101 from the backblowing main pipe 41 through the backblowing nozzle 44, so that under the drive of the argon gas, the silicon powder on the inner wall of each powder filter space 32101 will be brought to the lower end space of the separation chamber 1101 and fall into the powder outlet channel 1102.

[0090] Preferably, the backflush assembly 40 further includes a backflush on-off member 45 . The backflush on-off member 45 is disposed in the backflush main pipe 41 , and is used to control the on-off of the flow of argon gas in the backflush main pipe 41 .

[0091] In order to enable those skilled in the art to understand the present application, in at least one embodiment of the present application, only the argon dust removal device capable of preventing spontaneous combustion of silicon powder further includes the second gas-powder separation component 30. The second gas-powder separation component 30 includes the installation partition 31 and at least two groups of the filter powder components 32 as an example for explanation.

[0092] It is worth mentioning that after argon gas is blown into the powder filter space 32101 through the back-blowing nozzle 44 to blow away the silicon powder attached to the inner wall of the powder filter space 32101, the replacement cycle of the powder filter element 32 can be extended, the service life of the powder filter element 32 can be increased, the replacement cost of the powder filter element 32 can be reduced, and the economic benefit of the argon dust removal device that can prevent spontaneous combustion of silicon powder can be improved.

[0093] Preferably, the blowback switch 45 is implemented to include a solenoid valve.

[0094] Preferably, each of the back-blowing nozzles 44 is detachably connected to an end of the gas branch pipe away from the back-blowing branch pipe 42, so as to facilitate the inspection and replacement of the back-blowing nozzle 44 when the back-blowing nozzle 44 is damaged.

[0095] Preferably, the filter powder body 321 is detachably threadedly connected to the mounting partition 31 to facilitate disassembly and maintenance of the filter powder body 321 .

[0096] In this embodiment, the filter powder cover 322 is detachably connected to the filter powder body 321. Since the back-blowing nozzle 44 penetrates the filter powder cover 322 and extends into the filter powder space 32101, the back-blowing nozzle 44 can be easily removed from the end of the gas distribution pipe by separating the filter powder cover 322 from the filter powder body 321. As a deformable method, the filter powder body 321 and the filter powder cover 322 are made in one piece.

[0097] Preferably, the first separation body 11 further forms at least one powder filter window 1103 communicating with the separation chamber 1101 .

[0098] As an example, through the powder filter window 1103, it can be observed that a small amount of argon gas in the argon gas is trapped on the inner wall of the powder filter space 32101, so that when it is observed that there is too much silicon powder on the inner wall of the powder filter space 32101, the corresponding backflush on-off component 45 is started and controlled to pass argon gas into the corresponding powder filter space 32101, and the silicon powder on the inner wall of the powder filter space 32101 is blown off by the argon gas.

[0099] At the same time, the use of the powder filter element 32 can be observed through the powder filter window 1103 so as to replace the powder filter element 32 in time.

[0100] Preferably, the argon dust removal device capable of preventing spontaneous combustion of silicon powder further comprises an air inlet 50. The air inlet 50 is arranged in the high-end space of the separation chamber 1101, so as to guide the argon gas in the high-end space of the separation chamber 1101 into the channel formed by the gas outlet pipe 13 through the air inlet 50.

[0101] As an example, when the air guide member 50 guides the argon gas in the high-end space of the separation chamber 1101 into the channel formed by the air outlet pipe 13, a negative pressure environment will be formed in the high-end space of the separation chamber 1101, so that the argon gas in the powder filter space 32101 is continuously pressed into the high-end space of the separation chamber 1101 through the powder filter holes 32102 by negative pressure, so as to increase the rate at which the argon gas enters the high-end space of the separation chamber 1101 from the powder filter space 32101 through several of the powder filter holes 32102, so as to increase the rate of filtering the argon gas.

[0102] Preferably, the air bleed member 50 is implemented to include a blower fan.

[0103] Preferably, the second gas-powder separation assembly 30 further includes a powder gathering component 33. The powder gathering component 33 includes a powder gathering piece 331 and a powder guiding pipe 332. The powder gathering piece 331 is connected to the mounting partition 31, and the powder gathering piece 331 is arranged in the lower end space of the separation chamber 1101. The powder gathering piece 331 forms a gas passage space 33101 and a plurality of gas passage holes 33102 that are in communication with the powder filtering space 32101. The gas passage space 33101 is in communication with the lower end space of the separation chamber 1101 through a plurality of the gas passage holes 33102. The cross-sectional size of the powder gathering piece 331 gradually decreases from the position close to the mounting partition 31 to the position far from the mounting partition 31, and forms a convergence port 33103. One end of the channel formed by the powder guiding pipe 332 is connected to the converging port 33103 , and the other end of the channel formed by the powder guiding pipe 332 is connected to the accommodating space 2201 of the powder inlet body 22 .

[0104] It can be understood that, in the process that argon gas gathers at the lower end space of the separation chamber 1101 and drives a small amount of silicon powder to make a spiral motion upward in a manner of reducing the spiral radius, the argon gas carrying a small amount of silicon powder will enter the gas space 33101 through the several gas holes 33102 of the powder gathering piece 331, and enter the powder filter space 32101 through the gas space 33101, so that in the process that the argon gas enters the high end space of the separation chamber 1101 through the several powder filter holes 32102, a small amount of silicon powder in the argon gas is retained on the inner wall of the powder filter space 32101.

[0105] At the same time, after the argon gas sprayed by the back-blowing nozzle 44 blows down the silicon powder on the inner wall of the powder filter space 32101, the blown silicon powder will slide down along the inner wall of the gas space 33101 and gather in the convergence port 33103, and then enter the accommodating space 2201 of the powder inlet body 22 through the channel formed by the powder guide pipe 332, so as to realize the collection of the silicon powder blown down from the inner wall of the powder filter space 32101. Among them, compared with the method of making the silicon powder fall into the lower end space of the separation chamber 1101 and converge into the powder outlet channel 1102, the method of gathering the silicon powder by the powder gathering member 331 can reduce the situation where the silicon powder is driven again by the argon gas that makes a spiral motion upward and cannot fall.

[0106] It is worth mentioning that since the argon gas in the lower end space of the separation chamber 1101 continuously enters the gas space 33101 through a plurality of the gas holes 33102, the silicon powder on the inner wall of the powder filter space 32101 cannot enter the lower end space of the separation chamber 1101 through the gas holes 33102 after falling into the gas space 33101, which is beneficial for the powder gathering member 331 to gather the silicon powder falling into the gas space 33101 to the gathering port 33103.

[0107] Preferably, the powder guide pipe 332 is provided with at least one powder guide window 33201, and the powder guide window 33201 is connected to the channel formed by the powder guide pipe 332, so that the amount of silicon powder passing through the channel formed by the powder guide pipe 332 can be observed through the powder guide window 33201, so that when it is known that the silicon powder in the channel formed by the powder guide pipe 332 is stuck, the powder guide pipe 332 can be inspected.

[0108] Preferably, the device body 10 further includes a powder outlet switch 14. The powder outlet switch 14 is disposed on the first separation body 11, and the powder outlet switch 14 is disposed at the powder outlet channel 1102. The powder outlet switch 14 is used to control the on-off of the powder outlet channel 1102, so that when all the powder inlet pipes 21 are removed from the first separation body 11 to repair and replace the spray assembly 20, the powder outlet channel 1102 is cut off to prevent the remaining silicon powder in the separation chamber 1101 from flowing out through the powder outlet channel 1102, thereby avoiding the waste of silicon powder.

[0109] It should be understood by those skilled in the art that the embodiments of the present application described above and shown in the accompanying drawings are only examples and do not limit the present application. The advantages of the present application have been fully and effectively realized. The functions and structural principles of the present application have been demonstrated and explained in the embodiments, and the embodiments of the present application may be deformed or modified in any way without departing from the principles.

Claims

1. An argon dust removal device capable of preventing spontaneous combustion of silicon powder, characterized in that: The argon dust removal device capable of preventing silicon powder from spontaneously igniting comprises: A device body, the device body comprising a first separation body, an air inlet pipe and an air outlet pipe, the first separation body forming a separation chamber and a powder outlet channel connected to the separation chamber, the powder outlet channel forming a lower end portion located in the gravity direction of the first separation body, the air inlet pipe being arranged on the first separation body, the channel formed by the air inlet pipe being connected to the separation chamber, one end portion of the air inlet pipe being tangential to the inner wall of the separation chamber and inclined downward, the channel formed by the air inlet pipe being used to introduce argon gas containing silicon powder into the separation chamber, the air outlet pipe being arranged on the higher end portion in the gravity direction of the first separation body, the channel formed by the air outlet pipe being connected to the separation chamber, the separation chamber being defined as a high-end space at a location connected to the channel formed by the air outlet pipe, and the separation chamber being defined as a low-end space at a location connected to the powder outlet channel; At least one spray assembly, the spray assembly comprising a powder inlet pipe, a powder inlet body and a spray component, the powder inlet body forming a storage space, two ends of the powder inlet pipe being respectively connected to the first separation body and the powder inlet body, and two ends of the channel formed by the powder inlet pipe being respectively connected to the powder outlet channel and the storage space, so as to guide the silicon powder in the powder outlet channel to the storage space through the channel formed by the powder inlet pipe, and the spray component being arranged on the powder inlet body in a manner of spraying liquid into the storage space, so as to mix the liquid into the silicon powder in the storage space through the spray component to form a water-powder mixed slurry; A second gas-powder separation component, the second gas-powder separation component includes an installation partition, at least two groups of filter powder parts and a powder gathering component, the installation partition is arranged in the separation chamber of the first separation body, and the installation partition is arranged between the low-end space and the high-end space of the separation chamber, each group of the filter powder parts includes at least two filter powder bodies, one end of each filter powder body of each group of the filter powder parts is arranged on the installation partition, and each filter powder body protrudes toward the high-end space, the filter powder body has a filter powder space and a plurality of filter powder holes, the filter powder space is connected with the low-end space, and the filter powder space is connected with the high-end space through the plurality of filter powder holes, the filter powder body is used to intercept dust in the argon gas flowing from the low-end space to the high-end space, and each group of the filter powder parts also includes at least two filter powder seals matching the inner diameters of at least two filter powder spaces. A cover, at least two of the powder filter covers are respectively arranged at one end of at least two of the powder filter bodies away from the mounting partition, and at least two of the powder filter covers are respectively used to close one end of at least two of the powder filter spaces away from the mounting partition, the powder gathering component comprises a powder gathering piece and a powder guiding pipe, the powder gathering piece is connected to the mounting partition, and the powder gathering piece is arranged at the lower end space of the separation chamber, the powder gathering piece forms an air passage space and a plurality of air passage holes connected to the powder filter space, the air passage space is connected to the lower end space of the separation chamber through the plurality of air passage holes, the cross-sectional size of the powder gathering piece gradually decreases from the position close to the mounting partition to the position away from the mounting partition, and forms a convergence port, one end of the powder guiding pipe forming a channel is connected to the convergence port, and the other end of the powder guiding pipe forming a channel is connected to the accommodating space of the powder inlet body; A back-blowing assembly, the back-blowing assembly comprises a back-blowing main pipe, at least two back-blowing branch pipes corresponding to at least two groups of filter powder elements, and at least two groups of back-blowing connecting pipe groups corresponding to at least two back-blowing branch pipes, the back-blowing main pipe is used to be fed with argon gas, one end of each of the back-blowing branch pipes is respectively connected to the back-blowing main pipe, each group of the back-blowing connecting pipe groups comprises at least two gas branch pipes corresponding to at least two filter powder covers, one end of each of the gas branch pipes in each group of the back-blowing connecting pipe groups is connected to an end of a back-blowing branch pipe away from the back-blowing main pipe, and the other end of each of the gas branch pipes in each group of the back-blowing connecting pipe groups is respectively directed toward one of the filter powder elements, the back-blowing assembly also comprises back-blowing nozzles corresponding to at least two of the filter powder covers of at least two groups of the filter powder elements, each of the back-blowing nozzles is arranged at an end of a gas branch pipe away from the back-blowing branch pipe, and each of the back-blowing nozzles passes through one of the filter powder covers and extends into the filter powder space.

2. The argon dust removal device capable of preventing spontaneous combustion of silicon powder according to claim 1, characterized in that: The cross-sectional dimensions of the inner wall at the lower end space of the separation chamber gradually decrease from top to bottom, and the powder outlet channel is connected to the minimum cross-sectional dimension of the lower end space.

3. The argon dust removal device capable of preventing spontaneous combustion of silicon powder according to claim 2, characterized in that: The spray assembly further comprises a powder inlet on-off piece, which is arranged on the powder inlet pipeline and is used to control the on-off of a channel formed by the powder inlet pipeline.

4. The argon dust removal device capable of preventing spontaneous combustion of silicon powder according to claim 3, characterized in that: The spray assembly is implemented in two, the two powder inlet bodies form the accommodating space, one end of the two powder inlet pipes are respectively connected to the first separation body, and one end of the two powder inlet pipes forming a channel are respectively connected to the powder outlet channel, the other end of the two powder inlet pipes are respectively connected to one of the powder inlet bodies, and the other end of the two powder inlet pipes forming a channel are respectively connected to the accommodating space of one of the powder inlet bodies, the two spray components are respectively arranged in the accommodating space of the two powder inlet bodies, and the two powder inlet on-off pieces are respectively arranged in the two powder inlet pipes in a manner that can control the on-off of the channel formed by the powder inlet pipes.

5. The argon dust removal device capable of preventing spontaneous combustion of silicon powder according to claim 4, characterized in that: The spray component includes at least one liquid inlet pipeline, at least one spray pipe group and multiple liquid spraying parts. The liquid inlet pipeline is used to be passed with liquid. The spray pipe group is arranged in the accommodating space. One end of the liquid inlet pipeline is connected to the spray pipe group, and one end of the channel formed by the liquid inlet pipeline is connected to the channel formed by the spray pipe group, so that the liquid is passed into the channel formed by the spray pipe group through the channel formed by the liquid inlet pipeline. Multiple liquid spraying parts are arranged in the spray pipe group, so that the liquid in the channel formed by the spray pipe group is sprayed into the silicon powder in the accommodating space through the liquid spraying parts to form a water-powder mixed slurry. The powder inlet body also forms a slurry outlet channel connected to the accommodating space. The slurry outlet channel is formed at the lower end of the powder inlet body, and the slurry outlet channel is used to pass the water-powder mixed slurry.

6. The argon dust removal device capable of preventing spontaneous combustion of silicon powder according to claim 5, characterized in that: The spray component also includes a liquid spray on-off component, which is arranged on the liquid inlet pipeline. The liquid spray on-off component is used to adjust the flow rate of liquid entering the channel formed by the liquid inlet pipeline into the channel formed by the spray pipe group. The powder inlet body forms at least one spray window, and the spray window is connected to the containing space so that the viscosity of the water-powder mixed slurry in the containing space can be observed through the spray window.

7. The argon dust removal device capable of preventing spontaneous combustion of silicon powder according to claim 6, characterized in that: The spray component also includes at least one slurry passing pipeline and at least one slurry passing on-off piece corresponding to the slurry passing pipeline. The two ends of the slurry passing pipeline are respectively connected to the liquid inlet pipeline and the powder inlet body, and the channel formed by the liquid inlet pipeline is connected to the slurry outlet channel through the channel formed by the slurry passing pipeline. The slurry passing on-off piece is arranged on the slurry passing pipeline, and the slurry passing on-off piece is used to control the on-off of the channel formed by the slurry passing pipeline.

8. The argon dust removal device capable of preventing spontaneous combustion of silicon powder according to claim 7, characterized in that: The backflush assembly further comprises at least two backflush on-off components corresponding to at least two backflush branch pipes, wherein the backflush on-off components are arranged in the backflush branch pipes and are used to control the on-off of argon gas flow in the backflush branch pipes.

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