Forming and drying system for diamond wire cutting waste silicon sludge

Abstract

The utility model discloses a diamond wire cutting waste silicon sludge forming and drying system, which comprises a feeder, a dryer, a discharger and a hot air heating component, the dryer comprises a drying shell and a drying inner cylinder, the drying inner cylinder is rotatably mounted in the drying shell, a plurality of heating holes are uniformly distributed and processed on the inner wall of the drying inner cylinder, and the feeder is connected with the discharger. A driving mechanism in transmission connection with the drying inner cylinder is installed on the drying shell, an anti-sticking assembly is arranged on the driving mechanism, the hot air heating assembly comprises a hot air main pipe and a hot air furnace, a hot air outlet of the hot air furnace communicates with the hot air main pipe, a control valve is installed on the hot air main pipe, and a plurality of hot air branch pipes are installed at the bottom of the heating shell at equal intervals in a penetrating mode; the lower ends of the hot-air branch pipes are communicated with the hot-air main pipe. The system not only can uniformly heat granulated silicon sludge pellets so as to achieve a uniform drying effect, but also is beneficial to improving the heating and drying efficiency and reducing the drying time and the energy consumption.

Description

Technical Field

[0001] The utility model belongs to the technical field of solid waste resource treatment and processing, and particularly relates to a forming and drying system for waste silicon mud cut by diamond wire. Background Technique

[0002] When cutting silicon rods or ingots with diamond, in order to ensure the processing accuracy and improve the surface quality of silicon wafers, it is necessary to use auxiliary cutting fluid to lubricate and wash the cutting surface to form silicon mud. The silicon mud includes silicon powder and residual diamond abrasives generated during the cutting of silicon rods or ingots by diamond wire. The average size of the silicon powder is 1-5 μm. The recycling of the silicon mud is generally used as a refractory material after drying, or used as a raw material for iron and steel smelting after simple sintering, resulting in a large amount of silicon mud that cannot be effectively recycled and applied to polysilicon processing. In addition, due to the low price of silicon mud and the inability to be effectively reused in silicon wafer processing, it limits the production cost of polysilicon and causes energy waste. In the existing technology, in order to improve the utilization rate of silicon mud, the silicon mud waste generated by polysilicon production enterprises has a high silicon content. When used as a refractory material, it will cause waste of silicon materials. After the silicon mud generated by polysilicon enterprises is pretreated, mixed with silicon dioxide, granulated, and dried, smelting to produce high-purity silicon ingots is a relatively environmentally friendly and efficient treatment method at present. At present, after granulation, the silicon mud is mostly dried by a drum dryer. The existing dryer has the following deficiencies in the process of use. The granulated silicon mud pellets are originally wet pellet raw materials with moisture, which will adhere to each other and easily agglomerate, and at the same time, they are easily adhered to the inner wall of the drum dryer, resulting in a low heat transfer coefficient for heat exchange with the heat carrier, low thermal efficiency of the dryer, and unsatisfactory drying effect. At the same time, it will cause an increase in drying energy consumption. Therefore, it is objectively necessary to develop a forming and drying system for waste silicon mud cut by diamond wire with reasonable structural design, low energy consumption, uniform drying, and effective improvement of drying efficiency. Summary of the Invention

[0003] The purpose of the utility model is to provide a forming and drying system for waste silicon mud cut by diamond wire with reasonable structural design, low energy consumption, uniform drying, and effective improvement of drying efficiency.

[0004] The purpose of the utility model is achieved in this way, including a feeder, a dryer, a discharger and a hot air heating component, the dryer includes a drying shell and a drying inner cylinder, the drying inner cylinder is rotatably installed inside the drying shell, a plurality of heating holes are evenly distributed on the inner wall of the drying inner cylinder, the feeder is connected with the feeding end of the drying inner cylinder, the discharger is arranged on the outer side of the discharging end of the drying inner cylinder, a driving mechanism connected with the drying inner cylinder is installed on the drying shell, an anti-sticking component is arranged on the driving mechanism, the hot air heating component includes a hot air main pipe and a hot air furnace, the hot air outlet of the hot air furnace is connected with the hot air main pipe, a control valve is installed on the hot air main pipe, a plurality of hot air branch pipes are evenly spaced and penetrated through the bottom of the drying shell, and the lower ends of the hot air branch pipes are connected with the hot air main pipe.

[0005] Compared with the existing technology, the advantages of the utility model are: first, the device uses a driving mechanism to drive the drying inner cylinder to rotate, and the hot air heating component is used for heating through the rolling and turning of the drying inner cylinder. The hot air heating component can evenly transport hot air into the drying shell, thereby realizing uniform heating of the granulated silicon mud pellets, thereby achieving a uniform drying effect, which helps to ensure that the silicon mud pellets are evenly heated during the heating and drying process, and avoids the situation where some silicon mud pellets are over-dried while other parts are not dried. At the same time, the drying shell arranged on the outside of the drying inner cylinder has good sealing performance, which can maximize the retention of heat, so that the hot air can fully and evenly contact the silicon mud pellets in the drying inner cylinder, which helps to improve the efficiency of heating and drying, and reduce the drying time and energy consumption. Second, the anti-sticking component can intermittently knock the outer wall of the drying inner cylinder, so that the silicon mud pellets adhered to the drying inner cylinder can be shaken off, thereby preventing the silicon mud pellets from adhering to the inner wall of the drying inner cylinder, and can further improve the drying efficiency of the silicon mud pellets. The device has the advantages of reasonable structural design, low energy consumption, significant drying effect, and good drying efficiency, and is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0007] Figure 2 It is an enlarged schematic diagram of part A in the utility model;

[0008] In the figure: 1-feeder, 2-discharger, 3-drying shell, 4-drying inner cylinder, 5-heating hole, 6-hot air main pipe, 7-hot air furnace, 8-hot air branch pipe, 9-driving motor, 10-transmission shaft, 11-driving gear, 12-tooth ring, 13-driving pulley, 14-driven pulley, 15-transmission belt, 16-shaft sleeve, 17-connecting rod, 18-cone head, 19-slide, 20-guide sleeve, 21-slider, 22-compression spring, 23-electric heating tube, 24-insulation layer, 25-support ring, 26-lifting plate, 27-dust exhaust pipe, 28-dust collector, 29-dehumidifier, 30-temperature sensor, 31-three-way pipe joint, 32-first connecting pipe, 33-second connecting pipe. DETAILED DESCRIPTION

[0009] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the teachings of the present invention belong to the protection scope of the present invention.

[0010] like Figures 1-2 As shown, the utility model includes a feeder 1, a dryer, a discharger 2 and a hot air heating component. The feeder 1 is mainly used to feed the silicon mud pellets after granulation into the drying inner cylinder 4. The feeder 1 includes a feed hopper and a guide pipe inserted into the feeding end of the drying inner cylinder 4. The dryer includes a drying shell 3 and a drying inner cylinder 4. The drying inner cylinder 4 is rotatably installed inside the drying shell 3. A plurality of heating holes 5 are evenly distributed on the inner wall of the drying inner cylinder 4. The feeder 1 is connected to the feeding end of the drying inner cylinder 4. The discharger 2 is arranged on the outside of the discharge end of the drying inner cylinder 4. A driving mechanism connected to the drying inner cylinder 4 is installed on the drying shell 3. A plurality of anti-sticking components are arranged on the driving mechanism. The anti-sticking components can be The drying inner cylinder is knocked under the action to prevent the silicon mud balls from adhering to the inner wall of the drying inner cylinder 4. In actual use, a sealed door can be set on the inner wall of the drying shell 3 to facilitate the staff to enter the drying shell 3 to clean the dust accumulated in the drying shell 3. The hot air heating component includes a hot air main pipe 6 and a hot air furnace 7. The hot air furnace 7 is a gas-fired hot air furnace used in the prior art, which is used to heat the air and then transport it to the drying shell 3 to heat the drying inner cylinder 4. The hot air outlet of the hot air furnace 7 is connected to the hot air main pipe 6. A control valve is installed on the hot air main pipe 6. A plurality of hot air branch pipes 8 are installed at equal intervals through the bottom of the drying shell 3, and the lower ends of the hot air branch pipes 8 are connected to the hot air main pipe 6.

[0011] The working process of this device is as follows: The granulated silicon mud pellets are added into the drying inner cylinder 4 through the feeder 1. The driving mechanism drives the drying inner cylinder 4 to rotate. At the same time, the control valve on the main hot air pipe 6 is opened, and the hot air generated by the hot blast stove 7 enters the main hot air pipe 6, then enters the drying housing 3 through the hot air branch pipe 8, and enters the drying inner cylinder 4 through the heating holes 5, directly contacting the silicon mud particles in the drying inner cylinder 4 to dry the silicon mud pellets. During the process of rotating with the drying inner cylinder 4, the silicon mud pellets gradually move towards the direction of the discharger 2, and finally enter the discharger 2 through the discharge end of the drying inner cylinder 4, thus completing the drying process. This device uses the driving mechanism to drive the drying inner cylinder 4 to rotate. Through the rolling and flipping of the drying inner cylinder 4, it cooperates with the hot air heating component for heating. The hot air heating component can evenly transport hot air into the drying housing 3, and then can uniformly heat the granulated silicon mud pellets, thus achieving the effect of uniform drying, which helps to ensure that the silicon mud pellets are evenly heated during the heating and drying process, avoiding the situation where some silicon mud pellets are over-dried while others are not dried. At the same time, the drying housing 3 arranged outside the drying inner cylinder 4 has good sealing performance, which can retain heat to the greatest extent, allowing the hot air to fully and evenly contact the silicon mud pellets in the drying inner cylinder 4, helping to improve the heating and drying efficiency, reduce the drying time and energy consumption. During the rotation of the drying inner cylinder 4, the anti-adhesion component arranged can intermittently knock on the outer wall of the drying inner cylinder 4 under the driving action of the driving mechanism, so that the silicon mud pellets adhering to the drying inner cylinder 4 can be shaken off, thereby preventing the occurrence of adhesion between the silicon mud pellets and the inner wall of the drying inner cylinder 4, and can further improve the drying efficiency of the silicon mud pellets.

[0012] Furthermore, the driving mechanism includes a driving motor 9, a transmission shaft 10, a driving gear 11 and a gear ring 12. The driving motor 9 is a device used in the prior art and can be directly purchased as a finished product according to the power used. The transmission shaft 10 is rotatably mounted on the drying shell 3 at the upper part of the drying inner cylinder 4. The gear ring 12 is fixedly mounted on the outer wall of the middle part of the drying inner cylinder 4. The driving gear 11 is mounted on the transmission shaft 10 and meshes with the gear ring 12. The driving motor 9 is mounted above the drying shell 3. A driving pulley is mounted on the output shaft of the driving motor 9. 13, a driven pulley 14 is installed at the end of the transmission shaft 10 located on one side of the driving pulley 13, and the driving pulley 13 and the driven pulley 14 are connected to each other through a transmission belt 15. A plurality of anti-sticking components are arranged at equal intervals on the transmission shaft 10 on both sides of the driving gear 11. When in use, the driving motor 9 drives the driving pulley 13 to rotate, and the driving pulley 13 drives the driven pulley 14, the transmission shaft 10 and the driving gear 11 to rotate through the transmission belt 15. During the rotation of the driving gear 11, the gear ring 12 is driven to rotate, and then the drying inner cylinder is driven to rotate in the drying shell 3. Preferably, the anti-sticking component includes a sleeve 16, a connecting rod 17 and a hammer 18, the sleeve 16 is fixedly mounted on the transmission shaft 10, one end of the connecting rod 17 is fixedly connected to the sleeve 16, the hammer 18 is movably mounted on the other end of the connecting rod 17, and the end of the hammer 18 is arranged in an arc shape. During the transmission process of the transmission shaft 10, the sleeve 16 drives the hammer 18 to rotate through the connecting rod 17. When the hammer 18 rotates to the lower end, it will knock on the side wall of the drying inner cylinder 4, so that the material adhered to the inner wall of the drying inner cylinder 4 can be shaken off, thereby preventing the silicon mud pellets from adhering to the inner wall of the drying inner cylinder 4, thereby preventing the silicon mud pellets from adhering to the inner wall of the drying inner cylinder 4. The drying efficiency of the drying inner cylinder 4 can be improved. One end of the connecting rod 17 is vertically evenly processed with multiple slide grooves 19. The top edge of the hammer head 18 is provided with a guide sleeve 20. The inner wall of the guide sleeve 20 is provided with a slider 21 corresponding to the slide groove 19. The slider 21 is slidably installed in the slide groove 19. The lower end of the connecting rod 17 and the upper end of the hammer head 18 are fixedly connected by multiple compression springs 22. When the hammer head 18 hits the side wall of the drying inner cylinder 4, the compression spring 22 will be compressed, so that the slider 21 slides in the slide groove 19 and the hammer head 18 moves upward, avoiding the hammer head 18 from being stuck on the heating hole 5, which can improve the convenience of use.

[0013] Furthermore, a spirally mounted electric heating tube 23 is provided on the inner wall of the drying shell 3. When the heating temperature of the hot air in the drying shell 3 does not meet the requirement, the electric heating tube 23 can be used for auxiliary heating to improve the heating speed and efficiency.

[0014] Furthermore, a heat insulating layer 24 is provided on the inner wall of the drying shell 3, and the heat insulating layer 24 can prevent the heat inside the drying shell 3 from being lost, thereby reducing the consumption of heat energy.

[0015] Furthermore, in order to improve the use effect of the drying inner cylinder 4 and ensure the stable operation of the drying inner cylinder 4 during rotation, the drying inner cylinder 4 includes a feeding section, a drying section, and a discharging section connected in sequence. A sealing plate is installed at the end of the feeding section, and a through hole is provided on the sealing plate. The feeder 1 extends through the through hole into the drying section. The heating holes 5 are evenly distributed on the drying section. Support rings 25 are provided on the outer walls at both ends of the drying section, and the support rings 25 are fixedly connected to the inner wall of the drying housing 3 through multiple support rods.

[0016] Furthermore, a plurality of material lifting plates 26 are evenly distributed along the length direction of the drying section in the drying section. The material lifting plates 26 can return the silicon mud particles in the drying inner cylinder 4 to improve the drying effect.

[0017] In order to reduce the energy consumption of the device and improve the utilization rate of thermal energy, a discharge port is provided at the bottom of the discharger 2, and a dust exhaust pipe 27 is provided at the top of the discharger 2. A dust collector 28, a dehumidifier 29, and a temperature sensor 30 are sequentially arranged on the dust exhaust pipe 27. A three-way pipe joint 31 is installed at the end of the dust exhaust pipe 27. One interface of the three-way pipe joint 31 is connected to a first connecting pipe 32, and the first connecting pipe 32 is connected to the hot blast stove 7. The other interface of the three-way pipe joint 31 is connected to a second connecting pipe 33, and the second connecting pipe 33 is connected to the hot air main pipe 6. Control valves are provided on both the second connecting pipe 33 and the first connecting pipe 32. During use, the hot air discharged from the drying inner cylinder 4 enters the dust collector 28 through the dust exhaust pipe 27, enters the dehumidifier 29 after dust removal treatment. After the hot air is dehumidified, the temperature sensor 30 detects the temperature of the hot air. If the temperature of the hot air is lower than the standard value of the heating temperature, the hot air returns to the hot blast stove 7 through the first connecting pipe 32 for heating treatment. If the temperature of the hot air is higher than the standard value of the heating temperature, it can enter the hot air main pipe 6 through the second connecting pipe 33 for recycling. The recycling of hot air can reduce the energy consumption of the system to a certain extent and reduce the operating cost.

Claims

1. A forming and drying system for waste silicon mud cut by diamond wire, characterized in that: The invention comprises a feeder (1), a dryer, a discharger (2) and a hot air heating component, wherein the dryer comprises a drying shell (3) and a drying inner cylinder (4), wherein the drying inner cylinder (4) is rotatably mounted inside the drying shell (3), wherein the inner wall of the drying inner cylinder (4) is evenly processed with a plurality of heating holes (5), wherein the feeder (1) is connected to the feeding end of the drying inner cylinder (4), wherein the discharger (2) is arranged outside the discharge end of the drying inner cylinder (4), wherein a driving mechanism which is transmission-connected to the drying inner cylinder (4) is installed on the drying shell (3), wherein a plurality of anti-sticking components are arranged on the driving mechanism, wherein the hot air heating component comprises a hot air main pipe (6) and a hot air furnace (7), wherein the hot air outlet of the hot air furnace (7) is connected to the hot air main pipe (6), wherein a control valve is installed on the hot air main pipe (6), wherein a plurality of hot air branch pipes (8) are evenly spaced and penetrate the bottom of the drying shell (3), wherein the lower ends of the hot air branch pipes (8) are connected to the hot air main pipe (6).

2. The forming and drying system for waste silicon mud cut by diamond wire according to claim 1, characterized in that: The driving mechanism comprises a driving motor (9), a transmission shaft (10), a driving gear (11) and a gear ring (12); the transmission shaft (10) is rotatably mounted on a drying shell (3) at the upper part of a drying inner cylinder (4); the gear ring (12) is fixedly mounted on the outer wall of the middle part of the drying inner cylinder (4); the driving gear (11) is mounted on the transmission shaft (10) and meshes with the gear ring (12); the driving motor (9) is mounted above the drying shell (3); a driving pulley (13) is mounted on the output shaft of the driving motor (9); a driven pulley (14) is mounted on the end of the transmission shaft (10) located on one side of the driving pulley (13); the driving pulley (13) and the driven pulley (14) are connected in transmission via a transmission belt (15); and a plurality of anti-sticking components are arranged at equal intervals on the transmission shaft (10) at both sides of the driving gear (11).

3. The forming and drying system for cutting waste silicon mud with diamond wire according to claim 2, characterized in that: The anti-sticking component comprises a sleeve (16), a connecting rod (17) and a hammer head (18); the sleeve (16) is fixedly mounted on the transmission shaft (10); one end of the connecting rod (17) is fixedly connected to the sleeve (16); the hammer head (18) is movably mounted on the other end of the connecting rod (17); and the end of the hammer head (18) is arranged to be in an arc shape.

4. The forming and drying system for waste silicon mud cut by diamond wire according to claim 3, wherein: One end of the connecting rod (17) is vertically and evenly processed with a plurality of slide grooves (19); the top edge of the hammer head (18) is provided with a guide sleeve (20); the inner wall of the guide sleeve (20) is provided with a slider (21) corresponding to the slide groove (19); the slider (21) is slidably installed in the slide groove (19); the lower end of the connecting rod (17) and the upper end of the hammer head (18) are fixedly connected by a plurality of compression springs (22).

5. The forming and drying system for cutting waste silicon mud with diamond wire according to claim 1, characterized in that: A spirally mounted electric heating tube (23) is provided on the inner wall of the drying shell (3).

6. The forming and drying system for cutting waste silicon mud with diamond wire according to claim 1, characterized in that: A heat insulation layer (24) is provided on the inner wall of the drying shell (3).

7. The forming and drying system for waste silicon mud cut by diamond wire according to claim 1, wherein: The drying inner cylinder (4) includes a feeding section, a drying section, and a discharging section that are connected in sequence. A sealing plate is installed at the end of the feeding section, and a through hole is provided on the sealing plate. The feeder (1) extends through the through hole into the drying section. The heating holes (5) are evenly distributed on the drying section. Support rings (25) are provided on the outer walls at both ends of the drying section, and the support rings (25) are fixedly connected to the inner wall of the drying housing (3) through multiple support rings.

8. A forming and drying system for diamond wire cut waste silicon mud according to claim 7, characterized in that: A plurality of lifting plates (26) are evenly distributed along the length direction of the drying section in the drying section.

9. The forming and drying system for waste silicon mud cut by diamond wire according to claim 1, wherein: A discharge port is provided at the bottom of the discharger (2), and a dust exhaust pipe (27) is provided at the top of the discharger (2). A dust collector (28), a dehumidifier (29), and a temperature sensor (30) are sequentially provided on the dust exhaust pipe (27). A three-way pipe joint (31) is installed at the end of the dust exhaust pipe (27). One interface of the three-way pipe joint (31) is connected to a first connecting pipe (32), and the first connecting pipe (32) is communicated with the hot blast stove (7). The other interface of the three-way pipe joint (31) is connected to a second connecting pipe (33), and the second connecting pipe (33) is communicated with the hot air main pipe (6). Control valves are provided on both the second connecting pipe (33) and the first connecting pipe (32).

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