Crushing and screening device for preparing silicon powder

Abstract

The utility model discloses a crushing and screening device for preparing silicon powder, which comprises a box body, a crushing roller, a multi-stage screening device, spiral lifting devices and a material conveying device, the crushing roller is arranged above the inner side of the box body, the multi-stage screening device is arranged below the crushing device, and the spiral lifting devices are respectively arranged on the left side and the right side of the box body. The material conveying device is arranged below the box body; a spraying device a with dustproof and recycling functions is arranged above the box body; the multi-stage screening device further comprises a screening plate and a vibrating mechanism. A spraying device b with a cleaning function is arranged above the spiral lifting device; the material conveying device further comprises a conveying box, an induced draft fan and a sedimentation tank. The device has the functions that dust pollution in the crushing process can be reduced, and silicon dust in the crushing process can be recycled; a screening structure is added, and screening efficiency is improved; and accumulated dust in the vertical lifting mechanism is cleaned and lifted in time and is recycled.

Description

Technical Field

[0001] The utility model belongs to the technical field of crushing and screening, in particular to a crushing and screening device for silicon powder production. Background Art

[0002] In the production process of industrial silicon, the processed silica stone needs to be crushed and sent to the smelting furnace to be smelted into silicon liquid, and then cast into silicon ingots.

[0003] In the prior art, a raw silica crushing and screening device disclosed in Chinese patent (CN216149874U) includes a crushing box, a feeding port is provided at the top of the crushing box, and a discharge port is provided at the bottom. A crushing assembly and a screening assembly are provided in the crushing box from top to bottom. The crushing assembly includes a pair of parallel crushing rollers, and a crushing gap is provided between the pair of crushing rollers for the raw silica to fall. The screening assembly includes a lifting seat located below the crushing gap and two groups of screening mesh plates arranged symmetrically along the lifting seat. Each group of screening mesh plates includes a hinged middle screen and an edge screen. The middle screens of each group of screening mesh plates are hinged to each other, and the ends of the edge screens are hinged to the side walls of the crushing box, and the side walls of the crushing box are provided with a discharge port above the ends of the edge screens.

[0004] This method has the following defects: 1. The dust generated during the crushing and screening process is not recycled and easily causes environmental pollution; 2. Too much crushed material easily leads to the direct discharge of qualified material without being screened out, reducing the screening efficiency; 3. After the vertical lifting mechanism is used for a long time, silicon dust particles are easily accumulated inside, reducing the service life of the equipment.

[0005] To this end, this article provides a crushing and screening device for silicon powder production. Utility Model Content

[0006] In order to solve the above technical problems, the utility model discloses a crushing and screening device for silicon powder production, which can reduce dust pollution in the crushing process and recycle the silicon dust therein; increase the screening structure to improve the screening efficiency; and timely clean and lift the dust accumulated in the vertical lifting mechanism and recycle it.

[0007] In order to achieve the above technical effects, the present invention provides a crushing and screening device for silicon powder production, comprising a box body, a crushing roller, a multi-stage screening device, a spiral lifting device, and a material conveying device. The crushing roller is arranged on the upper inner side of the box body, the multi-stage screening device is arranged below the crushing device, the spiral lifting devices are respectively arranged on the left and right sides of the box body, and the material conveying device is arranged below the box body; it is characterized in that: a spray device a with a dust-proof and recovery function is arranged above the box body; the multi-stage screening device also includes a screen plate and a vibration mechanism, and the screen plates are respectively arranged on the sides of the vibration mechanism; a spray device b with a cleaning function is arranged above the spiral lifting device; the material conveying device also includes a conveying box, an induced draft fan, and a sedimentation tank. The induced draft fan is arranged on the right side of the conveying box and is connected to the conveying box through a pipeline. The sedimentation tank is arranged below the left side of the conveying box and is connected to the bottom of the conveying box through a pipeline.

[0008] Preferably, the vibration mechanism also includes a drive motor, a cam, a pulley, a transmission rod, a spring a, and a spring b. The drive motor is arranged at the lower part of the box body, the cam is connected to the output end of the drive motor, the transmission rod is arranged above the cam and the front end of the transmission rod is connected to the pulley shaft, the side of the transmission rod is connected to one end of the screen plate, the spring a is arranged at the lower right side of the screen plate, and the spring b is arranged at the upper end of the transmission rod.

[0009] Preferably, a sewage pipe is provided below the spiral lifting device and is connected to a sedimentation tank for recovering sewage generated after cleaning the spiral lifting device.

[0010] Preferably, the conveying box also includes an outer shell, a conveyor belt device, a sewage outlet, a material discharge outlet, and an air duct. The conveyor belt device is arranged on the inner side of the outer shell, the sewage outlet is arranged on the lower left side of the outer shell, the material discharge outlet is arranged on the lower right side of the outer shell, and the air duct is arranged on the right side of the outer shell.

[0011] Preferably, the bottom of the shell is inclined downward from the discharge port side to the sewage discharge port side.

[0012] Preferably, the conveyor belt device is provided with drainage holes to facilitate the drainage of water from the crushed materials.

[0013] Preferably, the outlet of the induced draft fan is provided with a filter to filter out water vapor and dust in the extracted air before discharging it.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The device includes a box body, a crushing roller, a multi-stage screening device, a spiral lifting device, and a material conveying device. The spray device a on the box body and the material conveying device can reduce dust pollution during the crushing process and recycle the silicon dust therein; the multi-stage screening device can classify the materials to avoid qualified materials from being screened out in time and repeatedly circulated, thereby improving the screening efficiency; the spray device b set on the spiral lifting device can clean the dust impurities accumulated in the spiral lifting device and recycle the silicon dust therein. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the utility model;

[0017] Figure 2 It is an isometric drawing of the present utility model;

[0018] Figure 3 yes Figure 2 A partial enlarged view of a in the middle;

[0019] Figure 4 It is a schematic diagram of the internal structure of the utility model;

[0020] Figure 5 yes Figure 4 A partial enlarged view of middle b;

[0021] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0022] 1. Box body; 2. Crushing roller; 3. Multi-stage screening device; 4. Screw lifting device; 5. Spraying device a; 6. Screen plate; 7. Spraying device b; 8. Conveyor box; 9. Induced draft fan; 10. Sedimentation tank; 11. Driving motor; 12. Cam; 13. Pulley; 14. Transmission rod; 15. Spring a; 16. Spring b; 17. Sewage pipe; 18. Casing; 19. Conveyor belt device; 20. Sewage outlet; 21. Discharge outlet; 22. Induced draft outlet; 23. Filter. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0024] like Figures 1 to 5As shown, the prior art in this embodiment has the following problems: The inventors have found that the prior art has the following defects: First, the dust generated during the crushing and screening process is not recycled and easily causes environmental pollution; Second, too much crushed material easily causes qualified material to be directly discharged without being screened out, reducing screening efficiency; Third, after long-term use of the vertical lifting mechanism, silicon dust particles are easily accumulated inside, reducing the service life of the equipment;

[0025] Therefore, the inventor provides a crushing and screening device for silicon powder production, comprising a box body 1, a crushing roller 2, a multi-stage screening device 3, a spiral lifting device 4, and a material conveying device, the crushing roller 2 is arranged on the upper inner side of the box body 1, the multi-stage screening device 3 is arranged below the crushing device, the spiral lifting device 4 is respectively arranged on the left and right sides of the box body 1, and the material conveying device is arranged below the box body 1; it is characterized in that: a spray device a5 with a dust recovery function is arranged above the box body 1; the multi-stage screening device 3 also includes a sieve plate 6 and a vibration mechanism, and the sieve plates 6 are respectively arranged on the sides of the vibration mechanism; a spray device b7 with a cleaning function is arranged above the spiral lifting device 4; the material conveying device also includes a conveying box 8, an induced draft fan 9, and a sedimentation tank 10, the induced draft fan 9 is arranged on the right side of the conveying box 8 and is connected to the conveying box 8 through a pipeline, and the sedimentation tank 10 is arranged on the lower left side of the conveying box 8 and is connected to the lower part of the conveying box 8 through a pipeline.

[0026] With the above solution, after the silica enters the box 1, the spray device a5 will wet the silica, and the silica with water on the surface will enter the crushing roller 2 and be crushed. No dust will be generated during the crushing process. The dust and fine debris generated by the crushing of the silica will mix with water to form sewage and flow down, falling onto the multi-stage screening device 3. After the graded screening of the multi-stage screening device 3, unqualified materials of various specifications will be screened into the spiral lifting devices 4 on both sides, and driven by the spiral lifting devices 4, they will return to the upper crushing roller 2 and be crushed to qualified specifications again. In the process, the dust accumulated by the spiral lifting device when conveying materials will be The water flow sprayed by the spray device b7 above the spiral lifting device 4 is flushed to the bottom of the device and finally flows into the sedimentation tank 10. Qualified materials are quickly screened and fall into the material conveying device. In the material conveying device, the moisture on the material is drained and collected in the sedimentation tank 10 below. The recyclable materials and water are precipitated and separated, so that the device can reduce dust pollution in the crushing process and recycle the silicon dust therein. In the process of draining water, the air flow inhaled by the induced draft fan 9 blows the water dry and enters the next process for powder making and ingot casting. The induced draft fan 9 can also form a negative pressure in the device to prevent dust pollution caused by the device.

[0027] Furthermore, the vibration mechanism also includes a drive motor 11, a cam 12, a pulley 13, a transmission rod 14, a spring a15, and a spring b16. The drive motor 11 is arranged at the lower part of the box body 1, the cam 12 is connected to the output end of the drive motor 11, the transmission rod 14 is arranged above the cam 12, and the front end of the transmission rod 14 is connected to the rotating shaft of the pulley 13. The side of the transmission rod 14 is connected to one end of the sieve plate 6. The spring a15 is arranged at the lower right side of the sieve plate 6, and the spring b16 is arranged at the upper end of the transmission rod 14.

[0028] Among them, the driving motor 11 drives the cam 12 to rotate, and the rotation of the cam 12 causes the transmission rod 14 connected to the pulley 13 to make regular up and down movements, cooperating with the spring a15 and the spring b16 to provide reset and buffering effects, thereby realizing the up and down screening function of the screen plate 6 connected to the transmission rod 14.

[0029] Furthermore, a sewage pipe 17 is provided below the spiral lifting device 4 and is connected to the sedimentation tank 10 for recovering sewage generated after cleaning the spiral lifting device 4;

[0030] Among them, the sewage generated after the spray device b7 cleans the spiral lifting device 4 is introduced into the sedimentation tank 10 through the sewage pipe 17, completing the functions of cleaning the spiral lifting device 4 and recycling resources.

[0031] Furthermore, the conveying box 8 also includes a shell 18, a conveyor belt device 19, a sewage outlet 20, a material discharge outlet 21, and an air inlet 22. The conveyor belt device 19 is arranged on the inner side of the shell 18, the sewage outlet 20 is arranged on the lower left side of the shell 18, the material discharge outlet 21 is arranged on the lower right side of the shell 18, and the air inlet 22 is arranged on the right side of the shell 18;

[0032] The conveyor belt device 19 transports the qualified materials after screening from above the sewage outlet 20 to above the discharge outlet 21 and then discharges them.

[0033] Furthermore, the bottom of the housing 18 is inclined downward from the side of the discharge port 21 to the side of the sewage discharge port 20;

[0034] The wastewater generated by the spraying device a5 spraying silica leaks from the conveyor belt device 19 and is collected at the bottom of the shell 18 to the sewage outlet 20 and discharged into the sedimentation tank 10.

[0035] Furthermore, the conveyor belt device 19 is provided with drainage holes (not shown in the figure) to facilitate the drainage of water from the crushed material;

[0036] The drainage hole can drain the sewage generated by the device and discharge it to the bottom of the shell 18, and finally flow into the sewage outlet 20 to recycle the sewage.

[0037] Furthermore, a filter 23 is provided at the outlet of the induced draft fan 9 to filter out the water vapor and dust in the extracted air before discharging it;

[0038] Among them, the air flow inhaled by the induced draft fan 9 can dry the moisture remaining on the material on the conveyor belt device 19. At the same time, the air flow inhaled by the induced draft fan 9 can make the air pressure environment in the device become negative pressure, preventing the dust generated by crushing and conveying from spreading and causing pollution. The air flow with moisture and a small amount of dust is filtered by the filter 23 and then discharged, reducing pollution to the environment.

[0039] To sum up, the device includes a box body 1, a crushing roller 2, a multi-stage screening device 3, a spiral lifting device 4, and a material conveying device. The spraying device a5 on the box body 1 and the material conveying device can reduce dust pollution during the crushing process and recycle the silicon dust therein; the multi-stage screening device 3 can classify the materials to avoid qualified materials from being screened out in time and repeatedly circulated, thereby improving the screening efficiency; the spraying device b7 arranged on the spiral lifting device 4 can clean the dust impurities accumulated in the spiral lifting device 4 and recycle the silicon dust therein.

[0040] The working principle of the utility model is as follows: silica is fed into the box 1, and the spray device a5 sprays water into the silica material to wet the silica material. After that, the silica enters the crushing roller 2 for crushing. Since the silica is wet, the dust generated by the silica crushing will mix with the water and flow down as sewage. The crushed material falls onto the multi-stage screening device 3. The driving motor 11 drives the cam 12 to rotate, so that the transmission rod 14 connected to the pulley 13 reciprocates up and down, thereby causing the sieve plate 6 connected to the transmission rod 14 to sieve up and down. The spring a15 and the spring b1 6 provides reset and buffering functions for the multi-stage screening device 3. The sieve holes (not shown in the figure) on each layer of the sieve plate 6 have different apertures. The top sieve screens out the largest materials and drops the screened materials into the spiral lifting device 4. The remaining materials fall onto the next sieve plate 6. Similarly, after multi-stage screening, the qualified materials fall onto the conveyor belt device 19 below. Since the sieve plates 6 at each level sequentially screen out the unqualified materials from large to small, the screening time of the materials on the sieve plate 6 is increased, thereby improving the screening efficiency.

[0041] The unqualified materials screened out are sent to the spiral lifting devices 4 on both sides and are lifted upward to the top of the device. They then fall back from the top outlet into the crushing roller 2 and are crushed again. The ash and debris generated during the lifting process are washed down by the water flow sprayed by the spray device b7 on the top of the conveying and lifting device, and are transported to the sedimentation tank 10 through the sewage pipe 17 at the bottom of the spiral lifting device 4 for sedimentation and recycling; the qualified materials screened out fall onto the conveyor belt device 19, and the sewage generated by the spray device a5 falls into the bottom of the shell 18 through the holes on the conveyor belt device 19, and is finally collected into the sedimentation tank 10 from the discharge port 21 to the sewage port 20. After sedimentation, the silicon dust and water therein are recovered. The recovered water can be connected to the spray device a5 and the spray device b7 for reuse after filtration, which reduces the dust pollution in the crushing process and recycles the silicon dust therein;

[0042] In the process of the conveyor belt device 19 transporting qualified materials to the discharge port 21, the induced draft fan 9 inhales the air flow and blows away the remaining moisture on the material, so that the material can enter the next step of powder making and ingot casting. At the same time, the air flow inhaled by the induced draft fan 9 can make the pressure inside the device negative, preventing the leakage of dust generated during the operation of the device. The air flow carrying moisture and a small amount of dust is discharged after being filtered at the outlet of the filter 23, reducing pollution to the environment.

[0043] At this point, the operation process of the entire device has been described.

[0044] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0045] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crushing and screening device for silicon powder production, comprising a housing (1), a crushing roller (2), a multi-stage screening device (3), a spiral lifting device (4), and a material conveying device, wherein the crushing roller (2) is arranged above the inner side of the housing (1), the multi-stage screening device (3) is arranged below the crushing device, the spiral lifting device (4) is respectively arranged on the left and right sides of the housing (1), and the material conveying device is arranged below the housing (1), characterized in that: A spray device a (5) with a dust-proof and dust-recovery function is provided above the box body (1); the multi-stage screening device (3) further comprises a sieve plate (6) and a vibration mechanism, wherein the sieve plate (6) is provided on the side of the vibration mechanism; a spray device b (7) with a cleaning function is provided above the spiral lifting device (4); the material conveying device further comprises a conveying box (8), an induced draft fan (9), and a sedimentation tank (10); the induced draft fan (9) is provided on the right side of the conveying box (8) and is connected to the conveying box (8) through a pipeline; the sedimentation tank (10) is provided below the left side of the conveying box (8) and is connected to the bottom of the conveying box (8) through a pipeline.

2. The crushing and screening device for silicon powder production according to claim 1, characterized in that: The vibration mechanism further includes a driving motor (11), a cam (12), a pulley (13), a transmission rod (14), a spring a (15), and a spring b (16). The driving motor (11) is arranged at the lower part of the box body (1), the cam (12) is connected to the output end of the driving motor (11), the transmission rod (14) is arranged above the cam (12), and the front end of the transmission rod (14) is connected to the rotating shaft of the pulley (13), the side of the transmission rod (14) is connected to one end of the sieve plate (6), the spring a (15) is arranged at the lower right side of the sieve plate (6), and the spring b (16) is arranged at the upper end of the transmission rod (14).

3. The crushing and screening device for silicon powder production according to claim 1, characterized in that: A sewage pipe (17) is provided below the spiral lifting device (4) and is connected to the sedimentation tank (10) for recovering sewage generated after cleaning the spiral lifting device (4).

4. The crushing and screening device for silicon powder production according to claim 1, characterized in that: The conveying box (8) further comprises a shell (18), a conveyor belt device (19), a sewage outlet (20), a material discharge outlet (21), and an air inlet (22), wherein the conveyor belt device (19) is arranged on the inner side of the shell (18), the sewage outlet (20) is arranged on the left side below the shell (18), the material discharge outlet (21) is arranged on the right side below the shell (18), and the air inlet (22) is arranged on the right side of the shell (18).

5. The crushing and screening device for silicon powder production according to claim 4, characterized in that: The bottom of the housing (18) is inclined downward from the side of the material discharge port (21) to the side of the sewage discharge port (20).

6. The crushing and screening device for silicon powder production according to claim 4, characterized in that: The conveyor belt device (19) is provided with drainage holes to facilitate the drainage of water from the crushed materials.

7. The crushing and screening device for silicon powder production according to claim 1, characterized in that: The outlet of the induced draft fan (9) is provided with a filter (23) for filtering water vapor and dust in the extracted air and then discharging the air.

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