A multi-stage filtering device for particulate silicon

Abstract

The utility model discloses a kind of granular silicon multistage filtering devices, including shell, the top of the shell is fixedly connected with material conveying box, the top of the material conveying box is fixedly installed with filter box on one side, the top of the material conveying box is fixedly installed with dust exhaust pipe on the side corresponding filter box, the dust outlet of dust exhaust pipe side is penetrated to the inside of filter box.This granular silicon multistage filtering device, by the accurate cooperation of jointing disc and dust exhaust pipe, constructs directional dust collection channel, completely blocks dust backflow path, the outer plate of the other side bottom of filter box is set, the jointing disc of its one side bottom fixation is penetrated to the inside of clamping groove and extends to the below of dust exhaust pipe dust outlet, the dust that granular silicon in material conveying box is raised in screw cutter disc conveying process, is inhaled dust exhaust pipe by dust suction pipe, when dust exhaust pipe guides dust into filter box inside, the particle of larger size in dust first falls due to gravity, directly falls into the jointing disc below.

Description

Technical Field

[0001] This utility model relates to the field of granular silicon technology, specifically to a multi-stage granular silicon filtration device. Background Technology

[0002] The semiconductor and solar energy fields require a large amount of silicon raw materials, and the purity of silicon raw materials directly determines the performance of semiconductor or solar energy products.

[0003] Most existing basic granular silicon filtration devices use a dust removal structure of "single filter + fan dust extraction". The fan draws the dust raised during the granular silicon screening process to the filter surface for interception, and then relies on manual periodic cleaning of the filter. The core problem with this type of structure is that there is no dedicated directional dust collection component. There are two obstacles to dust collection and cleaning. Granular silicon dust particles are small in size and light in weight. After being drawn to the filter surface by the fan, they tend to accumulate densely and cannot effectively intercept subsequent dust. The uncollected dust falls back into the granular silicon, causing secondary pollution of the granular silicon. Utility Model Content

[0004] The purpose of this invention is to provide a multi-stage filtration device for granular silicon, which solves the problem mentioned in the background art that most existing basic granular silicon filtration devices adopt a dust removal structure of "single filter screen + fan dust extraction". The dust raised during the granular silicon screening process is drawn to the filter screen surface for interception by the fan, and then the filter screen is cleaned manually periodically. The core problem of this structure is that there is no dedicated directional dust collection component. There are two obstacles to dust collection and cleaning. Granular silicon dust particles are small in size and light in weight. After being drawn to the filter screen surface by the fan, they tend to accumulate densely and cannot effectively intercept subsequent dust. The uncollected dust falls back into the granular silicon, causing secondary pollution of the granular silicon.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage granular silicon filtration device, comprising a housing, a material conveying box fixedly connected to the top of the housing, a filter box fixedly installed on one side of the top of the material conveying box, a dust discharge pipe fixedly installed on the top of the material conveying box corresponding to the side of the filter box, a dust outlet on one side of the dust discharge pipe penetrating into the interior of the filter box, a plurality of suction pipes connected to the bottom of the dust discharge pipe, the bottom of the suction pipes connected to the top of the material conveying box, a slot 2 and a slot 1 respectively opened on the other side of the filter box near the center and near the bottom, a dust suction fan fixedly installed on the top of the filter box, and a dust discharge fan above the dust outlet of the dust discharge pipe on one side of the filter box near the center. The filter box is fixedly installed with an internal side seat. An outer plate is provided at the bottom of the other side of the filter box. A collection tray is fixedly connected to the bottom of one side of the outer plate. One side of the collection tray extends through the interior of the first slot and extends to the bottom of the dust outlet of the dust discharge pipe. An installation block is fixedly connected to the top of one side of the outer plate. One side of the installation block extends through the interior of the second slot and a filter screen is fixedly installed. The side of the filter screen away from the installation block is engaged with the internal side seat. Sealing gaskets are fixedly connected to the top of the first slot and the top and bottom of the second slot. The two sealing gaskets at the top have their opposite sides in contact with the top and bottom of the installation block, respectively. The bottom of the sealing gasket at the bottom contacts the other side of the top of the collection tray.

[0006] Compared with the prior art, the beneficial effects of this utility model are: This multi-stage granular silicon filtration device, through the precise cooperation of the receiving disc and the dust discharge pipe, constructs a directional dust collection channel, completely blocking the dust backflow path. An outer plate is located at the bottom of the other side of the filter box, with a receiving disc fixed to one side of its bottom, extending into the slot and below the dust outlet of the dust discharge pipe. Dust raised during the conveying of granular silicon by the spiral cutter disc in the feed box is sucked into the dust discharge pipe through the suction pipe. When the dust discharge pipe guides the dust into the filter box, larger particles fall first due to gravity, directly into the receiving disc below. This directional receiving design allows large dust particles to be collected without being intercepted by the filter screen, reducing dust accumulation on the filter screen and preventing damage caused by large dust particles impacting the filter screen, thus extending the filter screen's service life. The other side of the top of the receiving disc is fixed to the bottom of the slot. A fixed sealing gasket contacts the dust collection tray, filling the gap between it and the slot to prevent dust collected in the tray from scattering through the gap. Simultaneously, a movable strip fixed at the bottom center of the tray extends into a movable groove at the bottom of the filter box and slides into it. The cooperation between the movable strip and the groove restricts the lateral displacement of the tray, ensuring it remains precisely positioned below the dust outlet of the exhaust pipe, preventing dust leakage due to tray displacement. Through the dual functions of directional collection and sealed storage, the tray effectively collects large dust particles, preventing them from falling back into the conveyor box or onto the vibrating filter tray inside the housing, reducing the risk of secondary contamination from particulate matter. The integrated design of the outer panel and pull rod allows for simultaneous and rapid assembly and disassembly of the tray and filter screen, significantly simplifying maintenance and reducing dust scattering. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 A magnified view of part A in the diagram; Figure 3 This is a three-dimensional view of the structure of the receiving tray of this utility model; Figure 4 This is a three-dimensional view of the structure of this utility model.

[0008] In the diagram: 1. Shell; 2. Material handling box; 3. Dust exhaust pipe; 4. Filter box; 5. Feeding pipe; 6. Variable frequency motor one; 7. Spiral cutter disc; 8. Feeding pipe; 9. Vibrating filter disc; 10. Irregular top block; 11. Variable frequency motor two; 12. Dust suction pipe; 13. Dust suction fan; 14. Built-in side seat; 15. Air outlet screen; 16. Slot one; 17. Outer panel; 18. Moving slot; 19. Waste receiving tray; 20. Moving strip; 21. Mounting block; 22. Filter screen; 23. Sealing gasket; 24. Pull rod; 25. Movable sealing door; 26. Slot two. Detailed Implementation

[0009] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0010] Please see Figure 1-4 This utility model provides a technical solution: a multi-stage granular silicon filtration device, including a housing 1, a conveying box 2 fixedly connected to the top of the housing 1, a filter box 4 fixedly installed on one side of the top of the conveying box 2, a dust discharge pipe 3 fixedly installed on the top of the conveying box 2 corresponding to the side of the filter box 4, a dust outlet on one side of the dust discharge pipe 3 penetrating into the interior of the filter box 4, a plurality of suction pipes 12 connected to the bottom of the dust discharge pipe 3, the bottom of the suction pipes 12 connected to the top of the conveying box 2, a slot 26 and a slot 16 respectively opened near the center and bottom of the other side of the filter box 4, a dust suction fan 13 fixedly installed at the top inside the filter box 4, and an internal side seat 14 fixedly installed above the dust outlet of the dust discharge pipe 3 near the center of one side of the filter box 4. An outer panel 17 is provided on the bottom of the other side of the box 4. A receiving tray 19 is fixedly connected to the bottom of one side of the outer panel 17. One side of the receiving tray 19 extends through the interior of the slot 16 and extends to the bottom of the dust outlet of the dust pipe 3. An installation block 21 is fixedly connected to the top of one side of the outer panel 17. One side of the installation block 21 extends through the interior of the slot 26 and a filter screen 22 is fixedly installed. The side of the filter screen 22 away from the installation block 21 is engaged with the built-in side seat 14. Sealing gaskets 23 are fixedly connected to the top of the slot 16 and the top and bottom of the slot 26. The two sealing gaskets 23 located at the top have their opposite sides in contact with the top and bottom of the installation block 21, respectively. The bottom of the sealing gasket 23 located at the bottom is in contact with the other side of the top of the receiving tray 19.

[0011] The material handling box 2 is rotatably connected to a spiral cutter head 7. A variable frequency motor 6 is fixedly installed on one side of the material handling box 2. The output end of the variable frequency motor 6 extends into the interior of the material handling box 2 and is fixedly connected to one side of the spiral cutter head 7.

[0012] The top of the material box 2 is connected to the feed pipe 8, and the bottom of the material box 2 is connected to the discharge pipe 5 on one side. The bottom of the discharge pipe 5 extends into the interior of the shell 1.

[0013] The housing 1 is equipped with a vibrating filter disc 9. Irregular top blocks 10 are rotatably connected to the bottom of the housing 1, corresponding to the two sides below the vibrating filter disc 9. Two variable frequency motors 11 are fixedly installed at the bottom of the front surface of the housing 1. The output end of the variable frequency motor 11 extends through the interior of the housing 1 and is fixedly connected to the front of the irregular top blocks 10.

[0014] A movable sealing door 25 is movably mounted on the front side of the housing 1, corresponding to the front side of the vibration filter disc 9.

[0015] A pull rod 24 is fixedly installed at the center of the other side of the outer panel 17, and an air outlet mesh 15 is fixedly installed on both sides of the top of the filter box 4 through mesh grooves.

[0016] The bottom of the filter box 4 is provided with a movable groove 18 corresponding to the bottom of the slot 16. A movable strip 20 is fixedly connected to the center of the bottom of the waste receiving tray 19. The bottom of the movable strip 20 passes through the interior of the movable groove 18 and is slidably connected to the movable groove 18.

[0017] Working principle: The granular silicon to be filtered is introduced into the conveying box 2 through the feed pipe 8 connected to the other side of the top of the conveying box 2. The variable frequency motor 6 fixedly installed on one side of the conveying box 2 is started, and its output end extends into the conveying box 2 and drives the spiral cutter disc 7 to rotate. During the rotation of the spiral cutter disc 7, the granular silicon is evenly conveyed along the inside of the conveying box 2 to the discharge pipe 5 connected to the bottom side, which avoids excessive dust generation due to the accumulation and collision of granular silicon, laying the foundation for subsequent dust removal and screening. The dust raised during the conveying of granular silicon is adsorbed by the negative pressure generated by the dust suction fan 13 fixedly installed at the top of the filter box 4. The top of the conveying box 2 corresponds to the side of the filter box 4. The fixed dust exhaust pipe 3, with several suction pipes 12 connected to its bottom, quickly sucks in dust. The dust is collected through the suction pipes 12 and then enters the dust exhaust pipe 3 through the dust outlet inside the filter box 4, completing the initial collection and transportation of dust and preventing dust from entering the screening stage with the particles. Larger particles in the dust entering the filter box 4 are separated from the airflow by gravity and fall downwards into the collection tray 19 at the bottom of the other side of the filter box 4. The collection tray 19 is fixed to the bottom of one side of the outer plate 17, extends through the slot 16 opened at the bottom of the other side of the filter box 4, and extends directly below the dust outlet of the dust exhaust pipe 3. To ensure that no large dust particles are missed, a movable strip 20 fixed at the bottom center of the dust collection tray 19 extends through the movable groove 18 corresponding to the slot 16 at the bottom of the filter box 4 and slides into the groove 18, limiting the lateral displacement of the dust collection tray 19 and ensuring that it is always accurately aligned with the dust outlet to avoid dust leakage. Smaller dust particles rise with the airflow and are intercepted by the filter screen 22 fixed on one side of the outer panel 17 near the top of the mounting block 21. The side of the filter screen 22 away from the mounting block 21 engages with the built-in side seat 14 fixed at the center of one side of the filter box 4. The built-in side seat 14 provides rigid support for the filter screen 22 to prevent it from being damaged by airflow. Negative pressure indentation deformation ensures stable filtration area. After small dust particles are intercepted by filter screen 22, clean air is discharged through the air outlet screen 15 fixed by mesh grooves on both sides of the top of filter box 4, achieving efficient stratified dust filtration. The sealing gasket 23 fixed at the top of slot one 16 contacts the other side of the top of the collection plate 19 at the bottom, filling the gap between the collection plate 19 and slot one 16. The sealing gaskets 23 fixed at the top and bottom of slot two 26 contact the top and bottom of the mounting block 21 on opposite sides, filling the gap between the mounting block 21 and slot two 26. The double seal can prevent dust on the collection plate 19 and filter screen 22 from being scattered, avoiding recontamination of particulate silicon.The granular silicon, conveyed and preliminarily dust-removed by the conveyor box 2, is introduced through the bottom of the feed pipe 5 onto the vibrating filter disc 9, which is movably assembled inside the housing 1. The vibrating filter disc 9 adopts a multi-layer screen design, with the mesh size gradually increasing from the top to the bottom. Each layer of screen is designed to intercept granular silicon impurities of different particle sizes, ensuring screening accuracy. Two variable frequency motors 11, fixed at the bottom of the front surface of the housing 1, are started. Their rear output ends penetrate into the interior of the housing 1 and drive the irregular top block 10, located at the bottom of the housing 1 and corresponding to the bottom of the vibrating filter disc 9, to rotate. When the irregular top block 10 rotates, its protrusions... The vibrating filter disc 9 is periodically lifted, causing it to vibrate at high frequency. Under this vibration, the silicon particles move along the surface of each screen layer. During vibration, large impurities larger than the mesh size of the upper screen are intercepted; medium-sized impurities between the mesh sizes of the upper and lower screens are intercepted; and qualified silicon particles that meet the size requirements pass smoothly through the upper and middle screens, ultimately remaining on the last screen of the vibrating filter disc 9. This achieves the screening goal of "layered removal of impurities and precise retention of qualified silicon particles." During vibration screening, the silicon particles are further... The small amount of dust that is stirred up can still be sucked into the dust discharge pipe 3 by the suction pipe 12 and enter the filter box 4 to be collected by the collection tray 19 or the filter screen 22, forming a complete purification process of "conveying dust removal - screening - secondary dust removal" to ensure the purity of qualified particles of silicon remaining on the last layer of screen. When dust accumulates in the collection tray 19 or the filter screen 22 is blocked, hold the pull rod 24 fixed in the center on the other side of the outer plate 17 and pull it outward to move the outer plate 17 synchronously, so that the collection tray 19 is disengaged from the first slot 16 and the mounting block 21 is disengaged from the second slot 26, thereby causing the filter screen 22 to detach from the built-in side seat 1. 4. To achieve simultaneous disassembly of both, empty the large dust particles in the receiving tray 19, and beat or wash the filter screen 22. After cleaning, push the outer plate 17 using the pull rod 24 to re-insert the receiving tray 19 into slot one 16 and the mounting block 21 into slot two 26, allowing the sealing gasket 23 to re-seal, completing the reset. Open the movable sealing door 25 on the front side of the housing 1 corresponding to the movable assembly on the front side of the vibrating filter tray 9, and directly remove the qualified silica particles remaining on the last layer of screens. Simultaneously clean the impurities intercepted on the upper and middle layers of screens. The operation is convenient and does not affect the sealing and dust removal status of the filter box 4.

[0018] In summary, this multi-stage granular silicon filtration device, through the precise cooperation of the receiving plate 19 and the dust discharge pipe 3, constructs a directional dust collection channel, completely blocking the dust backflow path. The outer plate 17, located at the bottom of the other side of the filter box 4, has a receiving plate 19 fixed to one side that extends into the slot 16 and below the dust outlet of the dust discharge pipe 3. Dust raised by the granular silicon in the conveying box 2 during the conveying process by the spiral cutter disc 7 is sucked into the dust discharge pipe 3 via the suction pipe 12. When the dust discharge pipe 3 guides the dust into the filter box 4, larger particles fall first due to gravity, directly into the receiving plate 19 below. This directional receiving design allows large dust particles to be collected without being intercepted by the filter screen 22, reducing dust accumulation on the filter screen and preventing damage caused by large dust particles impacting the filter screen, thus extending the filter screen's service life. The sealing gasket 2 fixed to the bottom of the slot 16 on the other side of the top of the receiving plate 19... 3. The sealing gasket 23 fills the gap between the receiving tray 19 and the slot 16 to prevent dust collected in the receiving tray 19 from scattering from the gap. At the same time, the movable strip 20 fixed at the bottom center of the receiving tray 19 extends into the movable groove 18 opened at the bottom of the filter box 4 and slides in connection with the movable groove 18. The cooperation between the movable strip 20 and the movable groove 18 restricts the lateral displacement of the receiving tray 19, ensuring that the receiving tray 19 is always accurately positioned below the dust outlet of the dust discharge pipe 3, avoiding dust leakage due to the displacement of the receiving tray 19. Through the dual function of directional receiving and sealed storage, the receiving tray 19 can effectively collect large dust particles and prevent them from falling back into the conveying box 2 or the vibrating filter tray 9 inside the shell 1, reducing the risk of secondary pollution from particulate silicon from the source. Through the integrated design of the outer plate 17 and the pull rod 24, the receiving tray 19 and the filter screen 22 can be quickly and synchronously disassembled and assembled, greatly simplifying maintenance operations and reducing dust scattering.

[0019] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0020] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0021] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multi-stage filtration device for particulate silicon, comprising a housing (1), characterized in that: A material handling box (2) is fixedly connected to the top of the housing (1). A filter box (4) is fixedly installed on one side of the top of the material handling box (2). A dust discharge pipe (3) is fixedly installed on the top of the material handling box (2) corresponding to the side of the filter box (4). The dust outlet on one side of the dust discharge pipe (3) extends into the interior of the filter box (4). Several suction pipes (12) are connected to the bottom of the dust discharge pipe (3). The bottom of the suction pipes (12) is connected to the top of the material handling box (2). A slot 2 (26) and a slot 1 (16) are respectively opened on the other side of the filter box (4) near the center and near the bottom. A dust suction fan (13) is fixedly installed on the top of the filter box (4). An internal side seat (14) is fixedly installed on the side of the filter box (4) near the center, above the dust outlet of the dust discharge pipe (3). An external side seat is provided on the bottom of the other side of the filter box (4). The outer plate (17) has a receiving tray (19) fixedly connected to the bottom of one side. One side of the receiving tray (19) extends through the interior of the first slot (16) and extends to the bottom of the dust outlet of the dust pipe (3). The outer plate (17) has a mounting block (21) fixedly connected to the top of one side. One side of the mounting block (21) extends through the interior of the second slot (26) and a filter screen (22) is fixedly installed. The side of the filter screen (22) away from the mounting block (21) is engaged with the built-in side seat (14). The top of the first slot (16) and the top and bottom of the second slot (26) are both fixedly connected with sealing gaskets (23). The two sealing gaskets (23) located at the top are in contact with the top and bottom of the mounting block (21) respectively. The bottom of the sealing gasket (23) located at the bottom is in contact with the other side of the top of the receiving tray (19).

2. The multi-stage filtration device for granular silicon according to claim 1, characterized in that: The material handling box (2) is rotatably connected to a spiral cutter disc (7). A variable frequency motor (6) is fixedly installed on one side of the material handling box (2). The output end of the variable frequency motor (6) extends into the material handling box (2) and is fixedly connected to one side of the spiral cutter disc (7).

3. The multi-stage filtration device for granular silicon according to claim 1, characterized in that: The top of the material box (2) is connected to the feed pipe (8), and the bottom of the material box (2) is connected to the discharge pipe (5) on one side. The bottom of the discharge pipe (5) extends into the interior of the shell (1).

4. The multi-stage filtration device for granular silicon according to claim 1, characterized in that: The housing (1) is equipped with a vibrating filter disc (9) inside. Irregular top blocks (10) are rotatably connected to the bottom position of the housing (1) corresponding to the two sides below the vibrating filter disc (9). Two variable frequency motors (11) are fixedly installed at the bottom position of the front surface of the housing (1). The output end of the variable frequency motor (11) extends through the interior of the housing (1) and is fixedly connected to the front side of the irregular top blocks (10).

5. The multi-stage filtration device for granular silicon according to claim 1, characterized in that: The front side of the housing (1) is movably fitted with a movable sealing door (25) corresponding to the front side of the vibration filter disc (9).

6. The multi-stage filtration device for granular silicon according to claim 1, characterized in that: A pull rod (24) is fixedly installed at the center of the other side of the outer panel (17), and an air outlet mesh (15) is fixedly installed on both sides of the top of the filter box (4) by opening mesh grooves.

7. The multi-stage filtration device for granular silicon according to claim 1, characterized in that: The bottom of the filter box (4) is provided with a moving groove (18) corresponding to the bottom of the card slot (16). The center of the bottom of the receiving plate (19) is fixedly connected to a moving strip (20). The bottom of the moving strip (20) extends through the interior of the moving groove (18) and is slidably connected to the moving groove (18).

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