Automated silicon material crushing and packaging system

Abstract

An automated silicon material crushing and packaging system, relating to the technical field of polycrystalline silicon production. The system comprises: a water quenching mechanism, a crushing mechanism, a screening mechanism, a vibratory feeding mechanism, a metering and bagging mechanism, and an automatic packing mechanism that are sequentially arranged. The positional heights of the crushing mechanism, the screening mechanism, and the vibratory feeding mechanism decrease in sequence. A discharge port of the crushing mechanism corresponds to a feed port of the screening mechanism from top to bottom, a discharge port of the screening mechanism corresponds to a feed port of the vibratory feeding mechanism from top to bottom, and a monocrystalline silicon liner plate is attached to an inner surface of a trough of the vibratory feeding mechanism. No belt conveyor is provided between the crushing mechanism, the screening mechanism, and the vibratory feeding mechanism, thereby reducing the probability of the polycrystalline silicon material coming into contact with external impurities. In addition, as the polycrystalline silicon material moves along the trough, the polycrystalline silicon material contacts an interface of the same element, thereby preventing metallic impurities from being incorporated into the polycrystalline silicon material.

Description

Silicon material automatic crushing and packaging system TECHNICAL FIELD

[0001] The present application relates to the technical field of polysilicon production, and in particular to a silicon material automatic crushing and packaging system. BACKGROUND

[0002] Polysilicon is a basic raw material for solar cells and integrated circuits. Polysilicon is mainly produced by using a modified Siemens process. The final product of this production method is a rod-shaped polysilicon deposited from a reduction furnace. However, according to actual needs, the rod-shaped polysilicon is generally crushed into block polysilicon. In the related art, the rod-shaped polysilicon is mostly crushed manually. With the rapid increase in polysilicon production capacity, not only is the number of crushing and packaging personnel excessive, but the crushing cost is also increased, and the product quality of the polysilicon is difficult to guarantee. Unidentified impurities are often introduced into the high-purity polysilicon product, which reduces the product quality of the polysilicon.

[0003] The process of crushing silicon material gradually forms a fully automated production mode integrating automatic crushing, conveying, and packaging from the previous labor-intensive mode of manual crushing, manual metering, packaging, boxing, and transportation.

[0004] Since any substance contacted by silicon material during the automatic crushing and packaging process can cause different degrees of pollution to the product, and there are many surrounding environments and key control points in the production process. If the selection of automatic equipment, the connection of each device, and the material requirements are not handled properly, it will cause great and irreparable loss to the production of silicon material. SUMMARY

[0005] Therefore, an embodiment of the present application provides a silicon material automatic crushing and packaging system, and the main purpose is to reduce the powder problem, surface gold problem, and impurity problem of silicon material during the crushing and packaging process.

[0006] To achieve the above purpose, the present application mainly provides the following technical scheme:

[0007] An embodiment of the present application provides a silicon material automatic crushing and packaging system, which comprises:

[0008] a water quenching mechanism, a crushing mechanism, a screening mechanism, a vibrating feeding mechanism, a metering and bagging mechanism, and an automatic boxing mechanism arranged in sequence;

[0009] The position height of the crushing mechanism, the screening mechanism, and the vibrating feeding mechanism decreases in sequence, the discharge port of the crushing mechanism corresponds to the feeding port of the screening mechanism from top to bottom, the discharge port of the screening mechanism corresponds to the feeding port of the vibrating feeding mechanism from top to bottom, and a single crystal silicon lining plate is attached to the inner surface of the trough of the vibrating feeding mechanism.

[0010] The purposes and solutions of the present application can also be further realized by the following technical measures.

[0011] Optionally, the water quenching mechanism comprises a feeding section, a heating section, a water cooling section and an air cooling section, a feeding robot is arranged between the air cooling section and the crushing mechanism, for putting the water-quenched polysilicon rod into the crushing mechanism, and the inner surfaces of the heating section, the water cooling section and the air cooling section are coated with tungsten carbide alloy.

[0012] Optionally, the crushing mechanism is a pulse crusher.

[0013] Optionally, the screening mechanism comprises a linear vibrating screen and a circular vibrating screen, the linear vibrating screen is provided with an upper screen and a lower screen, the end of the upper screen is provided with a first discharge port, the end of the lower screen is provided with a second discharge port, and the bottom discharge port of the linear vibrating screen is connected to the feeding port of the circular vibrating screen.

[0014] Optionally, the metering and bagging mechanism comprises a coarse metering unit, a bagging unit, a shaping metering unit, a heat sealing unit, a secondary bagging and sealing unit, a labeling and shaping unit, a gold detector and a re-counting and removing unit arranged in sequence.

[0015] Optionally, the shaping metering unit comprises a first metering scale and a second metering scale arranged in sequence.

[0016] Optionally, a chain lifting mechanism is further arranged, the positions of the water quenching mechanism, the crushing mechanism, the screening mechanism, the vibrating feeding mechanism and the metering and bagging mechanism are all higher than the position of the automatic boxing mechanism, for separating the working areas before and after the sealing of the packaging bag, facilitating the maintenance of cleanliness in different areas, and the chain lifting mechanism is arranged between the metering and bagging mechanism and the automatic boxing mechanism.

[0017] Optionally, the automatic boxing mechanism comprises a belt conveyor, a regular platform and a grabbing unit, one end of the belt conveyor corresponds to the chain lifting mechanism, and the other end corresponds to the regular platform, the grabbing unit comprises a support frame and a mechanical grabber, the support frame is arranged above the regular platform, the support frame is provided with a horizontal slide rail, and the mechanical grabber is slidingly connected to the horizontal slide rail, for grabbing the packaging bag on the belt conveyor to the regular platform, one side of one end of the belt conveyor is provided with a code scanner, and the other side of the other end of the belt conveyor is provided with a photoelectric sensor.

[0018] Optionally, the automatic boxing mechanism further comprises a mechanical grabber and an AGV transport vehicle, the AGV transport vehicle is used for transferring the packaging box, and the mechanical grabber is used for grabbing the packaging bag on the regular platform into the packaging box.

[0019] Optionally, the water quenching mechanism, the crushing mechanism, the screening mechanism, the vibrating feeding mechanism, the metering and bagging mechanism and the automatic boxing mechanism are integrated into the MES system.

[0020] By the above technical solution, the application has at least the following advantages:

[0021] After the water quenching treatment, cracks are generated in the silicon rod, and then the crushing treatment is performed, so that the silicon rod is broken into uniform particles under a small extrusion force, and the probability of forming fine polycrystalline silicon powder is reduced because a large extrusion force is not required.

[0022] The vibrating feeding mechanism is adopted, so that the screened material can continuously and uniformly move forward in the trough of the vibrating feeding mechanism, and the accurate metering of the metering and bagging mechanism can be matched.

[0023] Meanwhile, the discharge port of the crushing mechanism is arranged above the feeding port of the screening mechanism, and the discharge port of the screening mechanism is arranged above the discharge port of the vibrating feeding mechanism, so that no belt conveyor is arranged between the crushing mechanism, the screening mechanism and the vibrating feeding mechanism, thereby reducing the probability of the polycrystalline silicon material contacting impurities in the external environment.

[0024] Meanwhile, the inner surface of the trough of the vibrating feeding mechanism is attached with a single-crystal silicon lining plate, so that the polycrystalline silicon material contacts the same element interface during the movement in the trough, thereby further avoiding the mixing of metal impurities into the polycrystalline silicon material. BRIEF DESCRIPTION OF DRAWINGS

[0025] Fig. 1 is a structural schematic view of a silicon material automatic crushing and packaging system according to an embodiment of the application;

[0026] Fig. 2 is a structural schematic view of a water quenching mechanism;

[0027] Fig. 3 is a structural schematic view of a metering and bagging mechanism;

[0028] Fig. 4 is a structural schematic view of an automatic boxing mechanism;

[0029] Fig. 5 is a structural schematic view of a screening mechanism.

[0030] The reference signs in the drawings of the specification include: water quenching mechanism 1, crushing mechanism 2, vibrating feeding mechanism 3, heating section 4, water cooling section 5, air cooling section 6, feeding manipulator 7, linear vibrating screen 201, circular vibrating screen 202, first discharge port 203, second discharge port 204, coarse metering unit 8, bagging unit 9, shaping metering unit 10, heat sealing unit 11, secondary bagging and sealing unit 12, labeling and shaping unit 13, gold detector 14, reweighing and rejecting unit 15, first metering scale 101, second metering scale 102, chain lifting mechanism 16, belt conveyor 17, shaping platform 18, support frame 19, mechanical gripper 20, code scanner 21, photoelectric sensor 22, AGV transport vehicle 23, screening mechanism 24, metering and bagging mechanism 25, and automatic boxing mechanism 26. DETAILED DESCRIPTION

[0031] To further clarify the technical means and effects adopted by the present application to achieve the predetermined object of the application, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments. In the following description, different "an embodiment" or "embodiments" do not necessarily refer to the same embodiment. In addition, the specific features, structures or characteristics in one or more embodiments can be combined in any suitable form.

[0032] The present application is further described in detail below in combination with the drawings and embodiments.

[0033] As shown in FIGS. 1 and 5, one embodiment of the silicon material automatic crushing and packaging system provided by the present application includes:

[0034] The water quenching mechanism 1, the crushing mechanism 2, the screening mechanism 24, the vibrating feeding mechanism 3, the metering and bagging mechanism 25, and the automatic boxing mechanism 26 are arranged in sequence.

[0035] The positions of the crushing mechanism 2, the screening mechanism 24 and the vibrating feeding mechanism 3 are arranged in sequence with decreasing heights. The discharge port of the crushing mechanism 2 corresponds to the feeding port of the screening mechanism 24 from top to bottom. The discharge port of the screening mechanism 24 corresponds to the feeding port of the vibrating feeding mechanism 3 from top to bottom. The inner surface of the trough of the vibrating feeding mechanism 3 is attached with a single crystal silicon lining plate.

[0036] In the technical solution of the present application, after the polycrystalline silicon rod is subjected to water quenching treatment, cracks are generated inside the silicon rod, and then the silicon rod is crushed, so that the silicon rod is broken into uniform particles under a small extrusion force. Because a large extrusion force is not required, the probability of forming fine polycrystalline silicon powder is reduced.

[0037] The vibrating feeding mechanism 3 is adopted. After screening, the material can continuously and uniformly move forward in the trough of the vibrating feeding mechanism 3, which can cooperate with the accurate metering of the metering and bagging mechanism 25.

[0038] Meanwhile, the discharge port of the crushing mechanism 2 is arranged above the feeding port of the screening mechanism 24, and the discharge port of the screening mechanism 24 is arranged above the discharge port of the vibrating feeding mechanism 3, and no belt conveyor 17 is arranged between the crushing mechanism 2, the screening mechanism 24 and the vibrating feeding mechanism 3, thereby reducing the probability of the polysilicon material contacting impurities in the outside world;

[0039] Meanwhile, the inner surface of the chute of the vibrating feeding mechanism 3 is attached with a single crystal silicon lining plate, and the polysilicon material contacts the same element interface during the movement of the polysilicon material along the chute, thereby further avoiding the mixing of metal impurities into the polysilicon material.

[0040] As shown in FIG. 2, in the specific embodiment, the water quenching mechanism 1 comprises a feeding section, a heating section 4, a water cooling section 5 and an air cooling section 6, a feeding mechanical arm 7 is arranged between the air cooling section 6 and the crushing mechanism 2, for putting the polysilicon rod after water quenching into the crushing mechanism 2, and the inner surfaces of the heating section 4, the water cooling section 5 and the air cooling section 6 are coated with tungsten carbide alloy.

[0041] In the embodiment, specifically, the feeding section comprises a stepping mechanism and a mechanical arm for horizontally conveying the polysilicon rod, and the polysilicon rod enters the heating section 4 for temperature rising through the feeding section;

[0042] The heating section 4 comprises a heating furnace for heating the material conveyed by the feeding section, and a gas collecting hood is arranged on the heating furnace, and the inside of the heating furnace comprises a feeding end, an oxygen removal section, a heating section and a discharge end arranged in sequence;

[0043] The water cooling section 5 performs water cooling and spraying on the polysilicon rod material;

[0044] The air cooling section 6 performs air cooling on the polysilicon rod material, so as to ensure that the polysilicon rod material is cooled to the required temperature for subsequent crushing, and the air cooling section 6 adopts a conventional fan cooling;

[0045] The silicon rod is subjected to high temperature above 500 degrees, and the silicon rod is cracked through the principle of rapid high temperature and low temperature, so as to reduce the dust and particles generated by physical impact or hammering of the silicon rod, thereby reducing the loss and reducing the crushing loss rate of the silicon rod;

[0046] The inner surfaces of the heating section 4, the water cooling section 5 and the air cooling section 6 are coated with tungsten carbide alloy, which has extremely high surface hardness and good wear resistance, and has corrosion resistance and oxidation resistance, so that the polysilicon rod material can be greatly prevented from being polluted by metal and impurities.

[0047] In the specific embodiment, the crushing mechanism 2 adopts a pulse crusher.

[0048] In the embodiment, the inner surface of the pulse crusher is also coated with tungsten carbide alloy, so that the metal and impurities are prevented from mixing into the silicon material during the crushing of the polysilicon material.

[0049] As shown in FIG. 5, in the embodiment, the screening mechanism 24 comprises a linear vibrating screen 201 and a circular vibrating screen 202. The linear vibrating screen 201 is provided with an upper layer screen and a lower layer screen. The end of the upper layer screen is provided with a first discharge port 203, and the end of the lower layer screen is provided with a second discharge port 204. The bottom end discharge port of the linear vibrating screen 201 is connected to the feed port of the circular vibrating screen 202.

[0050] In the embodiment, the diameter of the screen hole of the upper layer screen is larger than that of the lower layer screen. The first discharge port 203 and the second discharge port 204 correspond to the feed port of the vibrating feeding mechanism 3 from top to bottom, respectively, for outputting polysilicon blocks of different size specifications to the vibrating feeding mechanism 3, so as to facilitate the packaging of polysilicon blocks of different specifications.

[0051] The polysilicon blocks passing through the screen hole of the lower layer screen enter the circular vibrating screen 202 through the bottom end discharge port of the linear vibrating screen 201, so as to facilitate the step-by-step screening of polysilicon fines.

[0052] As shown in FIG. 3, in the embodiment, the metering and bagging mechanism 25 comprises a coarse metering unit 8, a bagging unit 9, a shaping metering unit 10, a heat sealing unit 11, a secondary bagging and sealing unit 12, a labeling and shaping unit 13, a metal detector 14, and a re-metering and removing unit 15 arranged in sequence.

[0053] In the embodiment, the vibrating feeding mechanism 3 continuously outputs polysilicon blocks to the coarse metering unit 8, and the coarse metering unit 8 first meters the polysilicon blocks before bagging.

[0054] The bagging unit 9 bags the roughly metered polysilicon blocks in an inner packaging bag.

[0055] The shaping metering unit 10 accurately meters the inner packaging bag and the silicon material.

[0056] The heat sealing unit 11 first shapes the opening of the inner packaging bag, and then heat seals the opening of the inner packaging bag.

[0057] The secondary bagging and sealing unit 12 bags the polysilicon blocks in an outer packaging bag, and seals the outer packaging bag.

[0058] The labeling and shaping unit 13 labels, vacuums, and shapes the opening of the outer packaging bag.

[0059] During the forward conveying of the polysilicon material packaging bag, the metal detector 14 detects the content of large particle metals therein, including stainless steel particles with a diameter of more than 1 mm and graphite blocks with a diameter of more than 8 mm.

[0060] As shown in Fig. 3, in the embodiment, the shaping and metering unit 10 comprises a first metering scale 101 and a second metering scale 102 arranged in sequence.

[0061] In the embodiment, specifically, the metering scale needs a certain stabilization time to return to zero after each weighing, the first metering scale 101 and the second metering scale 102 are arranged in sequence, and the first metering scale 101 and the second metering scale 102 can be alternately weighed and returned to zero, thereby avoiding the situation that the packaging bag waits for weighing, and improving the efficiency of the whole machine.

[0062] As shown in Fig. 1, in the embodiment, a chain lifting mechanism 16 is further included, the positions of the water quenching mechanism 1, the crushing mechanism 2, the screening mechanism 24, the vibrating feeding mechanism 3 and the metering and bagging mechanism 25 are higher than the position of the automatic boxing mechanism 26, for separating the working areas before and after sealing of the packaging bag, facilitating the maintenance of cleanliness in different areas, and the chain lifting mechanism 16 is arranged between the metering and bagging mechanism 25 and the automatic boxing mechanism 26.

[0063] In the embodiment, specifically, the water quenching mechanism 1, the crushing mechanism 2, the screening mechanism 24, the vibrating feeding mechanism 3 and the metering and bagging mechanism 25 are at a higher position, thereby facilitating the maintenance of the area where the above-mentioned devices are located as a ten-thousand-level clean area; the automatic boxing mechanism 26 is a device for completing the single-bag packaging of the silicon material, and therefore the automatic boxing mechanism 26 does not pollute the silicon material when working, and thus the area where the automatic boxing mechanism 26 is located can be a non-clean area.

[0064] In the embodiment, by setting the height difference, the clean area and the non-clean area are distinguished, the requirement of the production process on the cleanliness is met, and the continuous transportation of the packaging bag is completed by the chain lifting mechanism 16.

[0065] Specifically, the chain lifting mechanism 16 comprises a rack, two chain wheels, a chain and a plurality of chain plates, the two chain wheels are rotationally connected to the rack, the chain is tensioned on the two chain wheels, and the plurality of chain plates are uniformly distributed on the outer edge of the chain, so that the plurality of chain plates are circularly transmitted with the chain, and the packaging bag of the weighed polysilicon block is placed on the chain plate moving from top to bottom and is transported to the automatic boxing mechanism 26.

[0066] As shown in FIG. 4, in the specific embodiment, the automatic boxing mechanism 26 comprises a belt conveyor 17, a shaping platform 18, and a grabbing unit, one end of the belt conveyor 17 corresponds to the chain lifting mechanism 16, the other end corresponds to the shaping platform 18, the grabbing unit comprises a support frame 19 and a mechanical grabber 20, the support frame 19 is arranged above the shaping platform 18, the support frame 19 is provided with a horizontal sliding rail, the mechanical grabber 20 is slidingly connected to the horizontal sliding rail, and the mechanical grabber 20 is used to grab the packaging bag on the belt conveyor 17 to the shaping platform 18, one end side of the belt conveyor 17 is provided with a code scanner 21, and the other end side of the belt conveyor 17 is provided with a photoelectric sensor 22.

[0067] In the embodiment, specifically, after the belt conveyor 17 receives the polysilicon material packaging bag on the chain plate of the chain lifting mechanism 16, the code scanner 21 scans the label barcode on the packaging bag, the controller obtains the specification information of the silicon material in the packaging bag, and then the photoelectric sensor 22 monitors that the packaging bag moves to the other end of the belt conveyor 17, the controller controls the mechanical grabber 20 to grab the packaging bag and moves along the horizontal sliding rail to place the packaging bag on the shaping platform 18.

[0068] As shown in FIG. 1, in the specific embodiment, the automatic boxing mechanism 26 further comprises a mechanical grabber and an AGV transport vehicle 23, the AGV transport vehicle 23 is used to transfer the packaging box, and the mechanical grabber is used to grab the packaging bag on the shaping platform 18 into the packaging box.

[0069] In the embodiment, specifically, the mechanical grabber places the packaging bag on the shaping platform 18 into the packaging box, and the AGV transport vehicle 23 transports the packaging box to a downstream boxing and warehousing process.

[0070] In the specific embodiment, the water quenching mechanism 1, the crushing mechanism 2, the screening mechanism 24, the vibrating feeding mechanism 3, the metering and bagging mechanism 25, and the automatic boxing mechanism 26 are integrated into an MES system.

[0071] In the embodiment, specifically, the production process monitoring of the MES system focuses on the monitoring of material transportation and quality indicators between production processes and process procedures. Based on real-time data of the production process, the water quenching mechanism 1, the crushing mechanism 2, the screening mechanism 24, the vibrating feeding mechanism 3, the metering and bagging mechanism 25, and the automatic boxing mechanism 26 are monitored in real time by using the configuration technology of the MES system, and data can be traced.

[0072] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An automated silicon material crushing and packaging system, characterized in that, The application relates to a silicon material automatic crushing and packaging system. The water quenching mechanism, the crushing mechanism, the screening mechanism, the vibrating feeding mechanism, the metering and bagging mechanism and the automatic boxing mechanism are arranged in sequence. The position height of the crushing mechanism, the screening mechanism and the vibrating feeding mechanism is sequentially decreased, the discharge port of the crushing mechanism corresponds to the feeding port of the screening mechanism from top to bottom, the discharge port of the screening mechanism corresponds to the feeding port of the vibrating feeding mechanism from top to bottom, and the inner surface of the trough of the vibrating feeding mechanism is attached with a single crystal silicon lining plate.

2. The silicon material automatic crushing and packaging system according to claim 1, wherein the water quenching mechanism comprises a feeding section, a heating section, a water cooling section and an air cooling section, a feeding robot is arranged between the air cooling section and the crushing mechanism, the feeding robot is used for putting the polycrystalline silicon rod after water quenching into the crushing mechanism, and the inner surfaces of the heating section, the water cooling section and the air cooling section are coated with tungsten carbide alloy.

3. The silicon material automatic crushing and packaging system according to claim 1, wherein the crushing mechanism is a pulse crusher.

4. The silicon material automatic crushing and packaging system according to claim 1, wherein the screening mechanism comprises a linear vibrating screen and a circular vibrating screen, the linear vibrating screen is provided with an upper screen and a lower screen, the end of the upper screen is provided with a first discharge port, the end of the lower screen is provided with a second discharge port, and the bottom discharge port of the linear vibrating screen is connected to the feeding port of the circular vibrating screen.

5. The silicon material automatic crushing and packaging system according to claim 1, wherein the metering and bagging mechanism comprises a coarse metering unit, a bagging unit, a shaping metering unit, a heat sealing unit, a secondary bagging and sealing unit, a label sticking and shaping unit, a gold detector and a re-counting and removing unit which are arranged in sequence.

6. The silicon material automatic crushing and packaging system according to claim 5, wherein the shaping metering unit comprises a first metering scale and a second metering scale which are arranged in sequence.

7. The silicon material automatic crushing and packaging system according to claim 5, further comprising a chain lifting mechanism, the positions of the water quenching mechanism, the crushing mechanism, the screening mechanism, the vibrating feeding mechanism and the metering and bagging mechanism are all higher than the position of the automatic boxing mechanism, the chain lifting mechanism is arranged between the metering and bagging mechanism and the automatic boxing mechanism, and the chain lifting mechanism is used for separating the working areas before and after the sealing of the packaging bag, so that the cleanliness of the areas can be maintained.

8. The silicon material automatic crushing and packaging system according to claim 7, wherein the automatic boxing mechanism comprises a belt conveyor, a shaping platform and a grabbing unit, one end of the belt conveyor corresponds to the chain lifting mechanism, the other end of the belt conveyor corresponds to the shaping platform, the grabbing unit comprises a support frame and a mechanical grabber, the support frame is arranged above the shaping platform, the support frame is provided with a horizontal sliding rail, and the mechanical grabber is slidably connected to the horizontal sliding rail and used for grabbing the packaging bag on the belt conveyor to the shaping platform, a code scanner is arranged on one side of one end of the belt conveyor, and a photoelectric sensor is arranged on the other side of the other end of the belt conveyor. ​ ​ ​ ​ ​ ​ ​ 9. The automatic crushing and packaging system of claim 8, wherein the automatic boxing mechanism further comprises a machine gripper and an AGV transport vehicle, the AGV transport vehicle being configured to transfer the packaging box, and the machine gripper being configured to pick up the packaging bag on the sizing platform and put it into the packaging box.

10. The automatic crushing and packaging system of any one of claims 1 to 9, wherein the water quenching mechanism, the crushing mechanism, the screening mechanism, the vibrating feeding mechanism, the metering and bagging mechanism, and the automatic boxing mechanism are integrated into an MES system. ​ ​

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