CN212328875U

CN212328875U - Polycrystalline silicon waste recycling and impurity removing device

Info

Publication number: CN212328875U
Application number: CN202020916416.9U
Authority: CN
Inventors: 钱晶; 岳振国; 陈涛; 和建丽
Original assignee: Jiangsu Nuoming High Temperature Materials Co ltd
Current assignee: Jiangsu Nuoming High Temperature Materials Co ltd
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2021-01-12
Anticipated expiration: 2030-05-26

Abstract

The utility model discloses a polycrystalline silicon waste recycling edulcoration device belongs to polycrystalline silicon processing technology field, and the device comprises box, vibration screening storehouse, heated warehouses, cleaning storehouse and recovery storehouse etc. and box back fixedly connected with total motor, vibration screening storehouse are connected with inlet tube and water drainage pipeline, and the polycrystalline silicon waste material after the screening gets into the heated warehouses burning and gets rid of combustible impurity, and the back is gone into cleaning storehouse and is utilized ultrasonic cleaning to get rid of and remain impurity, collects the save through the recovery storehouse of bottom. The utility model discloses convenient operation, degree of automation is high, adopts the screening to add the burning and gets rid of the various impurity in the polycrystalline silicon waste material with ultrasonic mode, has improved edulcoration efficiency and recovery quality, can solve present polycrystalline silicon waste material can't properly handle and lead to the wasting of resources environmental pollution scheduling problem, has good development prospect.

Description

Polycrystalline silicon waste recycling and impurity removing device

Technical Field

The utility model relates to a polycrystalline silicon processing technology field specifically relates to a polycrystalline silicon waste recycling edulcoration device.

Background

Polycrystalline silicon is an excellent semiconductor material, is a basic material of semiconductor devices such as modern artificial intelligence, automatic control, information processing, photoelectric conversion and the like, plays an important role in the field of solar energy utilization, and makes the main components of solar cells play an important role in military electronic equipment. The production technology of polysilicon materials has long been mastered in a few countries and manufacturers, and the state of technical blockade and market monopoly is formed. How to extract recyclable polysilicon from waste materials generated in the production and cutting processes of polysilicon is a problem to be solved currently.

Patent CN205999026U discloses a "polysilicon recovery device with high conversion rate", which can integrally collect polysilicon scraps together and integrally return to process, thus improving the recovery efficiency of polysilicon, but not effectively removing impurities in polysilicon.

In addition, the method for removing and recycling the impurities from the polysilicon waste in the prior art usually cannot completely remove various impurities therein, which causes the problem that the purity of the recycled polysilicon does not reach the standard, and the like, and therefore, a device for efficiently and scientifically recycling the polysilicon waste needs to be provided, and the resource utilization rate is improved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a polycrystalline silicon waste recycling and impurity removing device which has the advantages of high efficiency, science, low environmental pollution and certain economic benefit aiming at the technical problems.

The technical scheme of the utility model is that the polycrystalline silicon waste recycling and impurity removing device comprises a box body, wherein a feeding hole is fixed on one side of the upper part of the box body, and a main motor is fixedly connected to the back surface of the box body to provide electric power for the whole device; the vibrating screening bin is positioned at the upper part in the box body, the bottom surface of the vibrating screening bin is provided with a screen and a slag storage box, waste slag falls into the slag storage box through the screen, the vibrating screening bin is connected with a water inlet pipe and a water drainage pipeline, and the water inlet pipe is communicated with the slag storage box to carry the waste slag to be discharged through the water drainage pipeline; the heating bin is connected with the vibration screening bin through a pipeline, heating furnace wires are arranged on the upper surface and the side wall of the heating bin and used for heating the screened blocky polycrystalline silicon waste materials, a pipeline is arranged on one side of the heating bin and connected with an air outlet with a cooling effect, and a second motor connected with a main motor is arranged at the rear part of the heating bin and used for providing power for the heating bin; the cleaning bin is connected with the heating bin through a pipeline, an acid liquor inlet and a clear water inlet are formed in the outer portion of the cleaning bin and used for cleaning the blocky polycrystalline silicon waste after heating and burning, one end of the cleaning bin is connected with a drainage pipeline, and the other end of the cleaning bin is fixedly connected with an ultrasonic device which comprises an ultrasonic generator and an ultrasonic transducer connected in series with the ultrasonic generator and used for sending ultrasonic waves and removing impurities and cleaning the remaining blocky polycrystalline silicon waste; run through the bottom half and with the dismantled storehouse of retrieving of washing storehouse intercommunication, its and the storehouse door that washs the storehouse kneck and be equipped with and be used for controlling row material, retrieve the storehouse and still connect through the bottom reinforcement of welded fastening piece and box.

Furthermore, the upper part of the vibration screening bin is provided with a vibrating block, and the vibrating block is connected with a main motor through a transmission rod, so that the vibration screening bin vibrates.

Furthermore, a fireproof conveyor belt is arranged at the lower part of the heating bin, and the polycrystalline silicon waste after heating and combustion can be conveyed into the cleaning bin.

Further, the inlet tube adopts the rubber material to make, and fixed mounting has the valve on the inlet tube, can control the inflow.

Furthermore, the acid liquor inlet and the drainage pipeline are acid-base plastic-lined pipes, so that corrosion resistance can be kept for a long time.

Furthermore, a liquid level meter is arranged at the position, corresponding to the cleaning bin, outside the box body and used for observing the liquid level height in the cleaning bin.

Compared with the prior art, the utility model provides a pair of polycrystalline silicon waste recycling edulcoration device's beneficial effect is:

(1) the utility model adopts vibration screening and filtering to remove impurities in the polysilicon waste and silica fume harmful to human body, and retains large-particle polysilicon fragments; a heating bin is adopted for high-temperature heating and combustion, and combustible impurities such as rubber strips and the like in the waste are removed; ultrasonic cleaning is adopted to remove impurities, contact between an acidic solution and the polycrystalline silicon is increased, and impurity removal efficiency and recovery quality of the polycrystalline silicon are improved.

(2) The device has the advantages of convenient operation, high automation degree, compact structure, safety and reliability, ensures that the polycrystalline silicon meets the recovery requirement, and improves the resource utilization rate.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a sectional view of the case of the present invention;

figure 3 is a cross-sectional view of the lower portion a-a of the vibratory screening silo of figure 2 of the present invention.

The device comprises a box body 1, a vibration screening bin 2, a heating bin 3, a cleaning bin 4, a recovery bin 5, a total motor 6, a water discharging pipeline 7, a pipeline 8, an air outlet 9, an acid liquor inlet 10, a clear water inlet 11, a console 12, a liquid level meter 13, a welding fixing block 14, a supporting leg 15, a material inlet 16, a top cover 17, a water inlet 18, a motor 19, a valve 20, a vibration block 21, a heating furnace wire 22, a conveying belt 23, a screen 24, a slag storage box 25, an ultrasonic device 26, an ultrasonic generator 26a, an ultrasonic transducer 26b, an ultrasonic transducer 27, a bin door and a pipeline 28.

Detailed Description

In order to make the technical solutions in the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and the described embodiments are only some embodiments of the present invention, but not all embodiments.

The polycrystalline silicon waste recycling and impurity removing device shown in fig. 1 comprises a box body 1, wherein a feeding hole 16 is fixed on one side of the upper part of the box body 1, a main motor 6 is fixedly connected to the back surface of the box body 1, the main motor is subjected to appearance structure improvement according to a commercially available Y280S-2 motor so as to meet the setting requirement of the device, the power is 75Kw, power is supplied to the whole device, supporting legs 15 are arranged at the lower part of the box body 1, a control console 12 is arranged on the front surface of the box body 1, a plurality of buttons are arranged on the control motor and equipment, the control motor and the equipment are operated, the control console is a commercially available TC manual pressure;

as shown in fig. 2 and 3, the vibrating screening bin 2 located at the upper part of the box body 1 is provided with a screen 24 and a slag storage box 25 on the lower bottom surface, which ensures that residue powder is filtered, polysilicon waste which can be recycled is retained, the residue powder falls into the slag storage box 25 through the screen 24, the vibrating screening bin 2 is connected with a water inlet pipe 18 and a water discharge pipeline 7, the water inlet pipe 18 is communicated with the slag storage box 25 to carry waste slag to be discharged through the water discharge pipeline 7, the vibrating screening bin 2 is provided with a vibrating block 21 on the upper part, the vibrating block 21 is connected with a main motor 6 through a transmission rod to enable the vibrating screening bin 2 to vibrate, the polysilicon waste can be pushed to move to one side of a pipeline 28 from one side of a feed inlet 16 and fall into the heating bin 3 through the pipeline 28 in the vibrating process, the inner surface of the vibrating screening bin 2 is coated with;

as shown in fig. 1 and fig. 2, the heating chamber 3 connected with the vibration screening chamber 2 through the pipeline 28 has heating furnace wires 22 on the upper surface and the side wall, the heating mode is electric heating, for heating the screened polysilicon waste, a pipeline 8 is installed on one side of the heating chamber 3, the pipeline 8 is connected with an air outlet 9 with cooling function, the rear part of the heating chamber 3 is provided with a second motor 19 connected with a main motor 6, the appearance structure of the second motor is improved according to a commercially available Y160L-2 type motor to adapt to the setting requirement of the device, power is provided for the heating chamber 3, the lower part of the heating chamber 3 is provided with a refractory conveyor belt 23, and the polysilicon waste after heating and burning can be sent into the cleaning chamber 4; an acid liquor inlet 10 and a clear water inlet 11 are arranged outside the cleaning bin 4 and used for cleaning polycrystalline silicon waste materials after heating and burning, the acid liquor inlet 10 and the water discharge pipeline 7 are acid-base plastic-lined pipes and can keep corrosion resistance for a long time, one end of the cleaning bin 4 is connected with the water discharge pipeline 7, one end of the cleaning bin is fixedly connected with an ultrasonic device 26 which is used for removing impurities and cleaning the residual polycrystalline silicon waste materials, the ultrasonic device 26 comprises an ultrasonic generator 26a and an ultrasonic transducer 26b which is connected in series with the ultrasonic generator and is used for emitting ultrasonic waves, the contact force of an acid solvent and the polycrystalline silicon waste materials is increased, bubbles generated by the ultrasonic waves are dissolved in water, a cavitation effect is generated on the polycrystalline silicon surface, impurities are released from the polycrystalline silicon surface and then dissolved, so that the impurities are thoroughly removed, the ultrasonic device is a commercial TYD high-, which is a commercially available liquid level meter for observing the liquid level in the cleaning bin 4; run through box 1 bottom and with the removable recovery storehouse 5 that washs storehouse 4 intercommunication, its and 4 knecks in washing storehouse are equipped with the door 27 that is used for controlling row material, and recovery storehouse 5 still connects through welded fastening piece 14 and box 1 bottom additional, and the polycrystalline silicon garbage collection who will handle is deposited.

The method for recycling the polycrystalline silicon waste by applying the device of the embodiment comprises the following steps:

polysilicon waste is sent into a vibration screening bin 2 through a feed inlet 16, the vibration screening bin 2 is started through a control console 12, a heating bin 3 is started for preheating, waste residues and silica fume in the waste fall into a residue storage box 25 through a screen 24, meanwhile oversize materials are close to a pipeline 28 through vibration and fall to the heating bin 3, a water inlet pipe 18 is communicated with the residue storage box 25 to carry the waste residues to be discharged through a drainage pipeline 7, screened polysilicon crushed materials and lump materials enter the heating bin 3 through a pipeline, the heating bin 3 is started through the control console 12 to be heated and combusted to remove combustible impurities, then the screened polysilicon crushed materials and lump materials enter a cleaning bin 4 through a conveyor belt 23, an acid liquor inlet 10 is opened to inject an acid solvent into the cleaning bin 4 and an ultrasonic device 26 is started through the control console 12, bubbles generated by ultrasonic waves are dissolved in water to generate a cavitation effect on the surface of polysilicon, so that the impurities are dissolved, thereby completely removing impurities. Finally, the clean water inlet 11 is opened, the bin door 27 of the recovery bin 5 is opened after the polysilicon is cleaned by clean water, and the treated polysilicon waste is collected and stored.

Claims

1. The polycrystalline silicon waste recycling and impurity removing device is characterized by comprising a box body (1), wherein a feeding hole (16) is fixed on one side of the upper part of the box body (1), and a main motor (6) is fixedly connected to the back surface of the box body (1);

the vibrating screening bin (2) is positioned at the upper part in the box body (1), the bottom surface of the vibrating screening bin is provided with a screen (24) and a slag storage box (25), and the vibrating screening bin (2) is connected with a water inlet pipe (18) and a water drainage pipeline (7);

the heating bin (3) is connected with the vibration screening bin (2) through a pipeline (28), heating furnace wires (22) are arranged on the upper surface and the side wall of the heating bin, a pipeline (8) is arranged on one side of the heating bin (3), the pipeline (8) is connected with an air outlet (9) with a cooling effect, and a second motor (19) connected with a main motor (6) is arranged at the rear part of the heating bin (3);

the cleaning bin (4) is connected with the heating bin (3) through a pipeline, an acid liquor inlet (10) and a clear water inlet (11) are formed in the outer portion of the cleaning bin, one end of the cleaning bin (4) is connected with a drainage pipeline (7), and the other end of the cleaning bin is fixedly connected with an ultrasonic device (26);

run through box (1) bottom and with the dismantlement of washing storehouse (4) intercommunication retrieve storehouse (5), its and washing storehouse (4) kneck is equipped with bin gate (27) that are used for control to arrange the material, retrieve storehouse (5) still through welded fastening piece (14) and box (1) bottom reinforcing connection.

2. The polycrystalline silicon waste recycling and impurity removing device according to claim 1, wherein a vibrating block (21) is arranged at the upper part of the vibrating screening bin (2), and the vibrating block (21) is connected with a main motor (6) through a transmission rod.

3. The polycrystalline silicon waste recycling and impurity removing device according to claim 1, wherein a refractory conveyor belt (23) is arranged at the lower part of the heating bin (3).

4. The polycrystalline silicon waste recycling and impurity removing device according to claim 1, wherein the water inlet pipe (18) is made of rubber, and a valve (20) is fixedly installed on the water inlet pipe (18).

5. The polycrystalline silicon waste recycling and impurity removing device according to claim 1, wherein the acid liquor inlet (10) and the drain pipeline (7) are acid-base plastic-lined pipes.

6. The polycrystalline silicon waste recycling and impurity removing device according to claim 1, wherein a liquid level meter (13) is arranged outside the box body (1) and at a position corresponding to the cleaning bin (4).