Silica powder purification system

Abstract

The invention discloses a silica powder purification system, and relates to the technical field of silica powder purification. Comprising a bottom plate, a rack mounted on the upper surface of the bottom plate, a reaction kettle mounted on the upper surface of the rack, a suction filtration box mounted below the reaction kettle, a vacuum pump connected to one side of the suction filtration box, an acid liquor storage tank mounted on one side of the bottom plate, a liquor inlet pipe connected between the acid liquor storage tank and the reaction kettle, and an acid liquor pump mounted on the liquor inlet pipe, a jacket is mounted on the outer side wall of the reaction kettle, a drying cover is mounted on one side of the jacket, and a rotating cylinder is mounted at the center in the reaction kettle. By arranging the rotating cylinder, the fixed shaft and the stirring rod, crushing, screening, acid leaching and stirring processes in the silica powder purification process can be automatically carried out in the reaction kettle; and by arranging the interlayer, the air outlet pipe and the fixed seat, heat generated by the heating wire in the interlayer can be used for heating the reaction kettle and can also be used for carrying out hot air drying on the filtered silica powder filter cake.

Description

Technical Field

[0001] The present invention relates to the technical field of silica powder purification, and particularly to a silica powder purification system. Background Art

[0002] A silica powder purification system is a combination of equipment and processes used to improve the purity of silica powder and remove impurities such as carbon and metal oxides. Common silica powder purification techniques include calcination purification, acid method purification, wet method purification, flocculation method purification, and magnetic separation purification. Among them, the principle of acid method purification is based on the characteristic that silicon dioxide is insoluble in acid. The method of acid leaching or acid washing is used to dissolve metal oxide impurities in silica powder. Currently, the acid method purification system for silica powder usually includes a reaction vessel, a stirring device, and a filtering device. The specific steps of acid method purification are material selection, crushing, acid leaching, stirring, filtering, washing, drying, detection, and packaging.

[0003] The existing acid method purification system for silica powder needs to borrow crushing and screening equipment to perform pre-crushing treatment on silica powder particles. After screening, silica powder with a suitable particle size range is obtained, and then the silica powder particles and acid solution are transferred and poured into a reaction kettle for acid leaching treatment, and at the same time, it is stirred by a stirring device. The existing reaction kettle lacks the function of integrating crushing, screening, and stirring, resulting in the need to use multiple devices for operation during the acid leaching process, which is not conducive to the efficient purification of silica powder; moreover, during the acid leaching, filtering, washing, and drying processes of silica powder, the silica powder needs to be transferred manually multiple times, the degree of automation of the purification process is low, the manual labor burden is large, and the surface of the silica powder is attached with acid solution after acid leaching, and the safety of manual operation is low. Summary of the Invention

[0004] The purpose of the present invention is to provide a silica powder purification system to solve the problems raised in the above background art.

[0005] To achieve the above object, the present invention provides the following technical solution: A silica powder purification system, comprising a bottom plate, a frame installed on the upper surface of the bottom plate, a reaction kettle installed on the upper surface of the frame, a suction filtration box installed below the reaction kettle, a vacuum pump connected to one side of the suction filtration box, an acid solution storage tank installed on one side of the bottom plate, a liquid inlet pipe connected between the acid solution storage tank and the reaction kettle, and an acid solution pump installed on the liquid inlet pipe. A jacket is installed on the outer side wall of the reaction kettle, a drying hood is installed on one side of the jacket, a rotating cylinder is installed at the center inside the reaction kettle, a first bearing is installed between the top of the rotating cylinder and the inner wall of the reaction kettle, a hollow shaft is integrally connected to the bottom of the rotating cylinder, a second bearing is installed between the hollow shaft and the bottom surface of the reaction kettle, a secondary gear is sleeved outside the hollow shaft below the second bearing, a main gear is installed inside the reaction kettle on one side of the secondary gear, a stirring motor is connected to the bottom of the main gear, through holes are formed through the side wall of the rotating cylinder, stirring rods are connected to the outer side wall of the rotating cylinder, a fixed shaft passes through the rotating cylinder at the center inside the reaction kettle, a crushing roller is sleeved outside the fixed shaft, a feed hopper is connected to the top of the reaction kettle, a connecting frame is connected between the top of the fixed shaft and the inner wall of the feed hopper, a liquid outlet pipe is connected to the bottom of the reaction kettle, and a liquid outlet valve is installed on the liquid outlet pipe.

[0006] Preferably, both the rotating cylinder and the hollow shaft are in the shape of a hollow cylinder. The main gear and the secondary gear are meshed and connected. The rotating cylinder and the hollow shaft are respectively rotatably connected to the reaction kettle through the first bearing and the second bearing. The upper part of the rotating cylinder is communicated with the feed hopper.

[0007] Preferably, the bottom of the fixed shaft passes through the hollow shaft and is connected to the inner wall of the reaction kettle. The top of the fixed shaft passes through the rotating cylinder and is connected to the feed hopper through the connecting frame. The upper half of the crushing roller is in the shape of a cone with an outer diameter gradually changing from narrow to wide, and the lower half is in the shape of a cylinder. There is a gap between the crushing roller and the inner wall of the rotating cylinder to form a crushing chamber, and the crushing chamber is communicated with the inner cavity of the reaction kettle through the through hole.

[0008] Preferably, the drying hood is in the shape of an inverted U. Rectangular grooves are respectively formed through the middle parts of the left and right side walls of the drying hood. Lifting cylinders are installed inside the two rectangular grooves. Lifting mechanisms are installed on the sides where the moving parts of the two lifting cylinders are close to each other. A fixed seat is connected to the lower surface of the middle part of the drying hood. A wind guiding groove is formed through the inside of the fixed seat. A rotating shaft is arranged through the center of the fixed seat. A third bearing is installed between the rotating shaft and the fixed seat. The bottom of the rotating shaft extends out from the lower surface of the fixed seat and is vertically connected with a cross bar. A dial rod is connected to the bottom of the cross bar.

[0009] Preferably, a heating wire is installed inside the jacket. An air outlet pipe is connected to the upper surface of one side of the jacket close to the drying hood. A blower is installed on the side wall of the other side of the jacket. The heating wires are arranged spirally and evenly on the outer side wall of the reaction kettle. The longitudinal section of the air outlet pipe is rectangular. One end of the air outlet pipe is communicated with the jacket, and the other end of the air outlet pipe passes through the drying hood and is communicated with the inner cavity of the fixed seat.

[0010] Preferably, the cross section of the air guide groove is circular and is arranged at equal intervals in the fixed seat. The top of the rotating shaft passes through the drying hood and extends from the upper surface of the air outlet pipe and is connected with a drying motor. The rotating shaft is rotationally connected with the fixed seat through a third bearing. The number of the cross bars is two, and they are symmetrically installed on the left and right side walls of the rotating shaft.

[0011] Preferably, the lifting mechanism includes a lifting plate installed on the moving part of the lifting cylinder. A groove is formed through the bottom of the lifting plate. A lifting block is installed inside the groove. A pin shaft is arranged through between the bottom of the lifting block and the lifting plate. A torsion spring is sleeved outside the pin shaft. The lifting block is rotationally connected with the lifting plate through the pin shaft. When the torsion spring is in a normal tensile state, the lifting block is perpendicular to the lifting plate.

[0012] Preferably, a filtrate drain port is formed in the bottom of the suction filtration box. A washing liquid drain port is formed on one side of the filtrate drain port. Drain valves are installed on both the filtrate drain port and the washing liquid drain port. A filter plate is movably inserted into the suction filtration box. Side ears are integrally connected to both the left and right sides of the filter plate. Filter holes are formed through the bottom surface of the filter plate. A support is connected to the bottom of the suction filtration box. A movable plate is connected to the bottom of the support. A filtrate collection box is movably placed on the upper surface of the movable plate below the suction filtration box. A washing liquid collection box is movably placed on the upper surface of the movable plate on one side of the filtrate collection box. The filter plate is in the shape of a rectangular box. The width dimension of the filter plate is adapted to the width dimension of the inner wall of the suction filtration box. The filter plate is movably inserted into the suction filtration box, and the side ears are placed on the upper surface of the suction filtration box.

[0013] Preferably, a movable groove is formed on the upper surface of the bottom plate. A driving cylinder is installed inside the bottom plate below the movable groove. The movable plate is inserted into the movable groove and forms a sliding connection with the bottom plate. The movable plate is connected to the upper surface of the moving part of the driving cylinder.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The silicon micropowder purification system is provided with a rotating drum, a fixed shaft and a stirring rod. The silicon micropowder particles are poured from a feed hopper into the rotating drum, and the silicon micropowder falls into the crushing chamber. The stirring motor drives the main gear to rotate, and the main gear drives the sub-gear to rotate. The sub-gear drives the rotating drum to rotate through the hollow shaft, so that the rotating drum drives the silicon micropowder to rotate relative to the crushing roller, and the silicon micropowder is crushed by the crushing roller. The silicon micropowder of a suitable particle size range generates centrifugal force with the rotation of the rotating drum, and is thrown into the reactor from the through hole, so that the silicon micropowder is automatically crushed and screened. After the acid solution is added, the rotating drum rotates to drive the stirring rod to rotate, and the acid solution and the silicon micropowder are stirred, so that the rotating drum can be used for the crushing and screening of the silicon micropowder, and can also be used for the acid leaching and stirring of the silicon micropowder, so that the crushing, screening, acid leaching and stirring processes in the silicon micropowder purification process can be automatically carried out in the reactor.

[0015] 2. The silicon micropowder purification system is provided with an interlayer, an air outlet pipe and a fixed seat. The heating wire is wound around the outer wall of the reactor to heat the reactor, thereby providing a suitable temperature environment for the silicon micropowder acid leaching. By starting the blower, the blower blows air into the interlayer. The air circulation carries the heat generated by the heating wire into the air outlet pipe. The hot air enters the fixed seat and is guided by the air guide groove and then blown into the filter plate to dry the filter cake filtered out of the filter plate. The heat generated by the heating wire in the interlayer can be used to heat the reactor and also can be used to dry the filtered silicon micropowder filter cake with hot air.

[0016] 3. The silicon micropowder purification system is provided with a rotating shaft, a cross bar and a lever. While the air in the air guide groove dries the filter cake with hot air, the drying motor drives the rotating shaft to rotate, the rotating shaft drives the cross bar to rotate relative to the fixed seat, the cross bar drives the lever to rotate, and the lever stirs the filter cake, so that the silicon micropowder is dispersed by the lever and evenly heated, thereby accelerating the drying speed of the silicon micropowder filter cake.

[0017] 4. The silicon micropowder purification system is provided with a lifting mechanism. When the filter box moves to the bottom of the drying hood, the lifting plate is driven downward by the lifting cylinder, and the lifting plate drives the lifting block to move downward. When the lifting block passes the side ear, it is squeezed by the side ear, and the lifting block is turned upward around the pin axis and inserted into the groove. The torsion spring generates a rebound force. When the lifting block passes the side ear, the torsion spring rebounds and pushes the lifting block to rotate and turn into a horizontal state. At this time, the lifting block is under the side ear, and the lifting cylinder drives the lifting plate to move up. The lifting plate drives the lifting block to move up, and the lifting block pushes the filter plate to move up through the side ear, so that the filter plate is pulled out of the filter box and plugged into the fixed seat for drying, thereby realizing the effect of automatically lifting the filter plate to transfer the silicon micropowder filter cake.

[0018] 5. This silica powder purification system is equipped with a movable plate and a driving cylinder. The driving cylinder drives the movable plate to slide in the movable groove, and the movable plate drives the suction filtration box to move left and right, enabling the position below the reaction kettle and the drying hood in the suction filtration box to be switched, achieving automatic transfer of silica powder, increasing the degree of automation in silica powder purification, and eliminating the need for manual intervention between multiple steps during the purification process. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a front cross-sectional view of the present invention; Figure 3 It is a schematic diagram of the structure in the drying and lifting state of the present invention; Figure 4 It is a front cross-sectional structure diagram of the reaction kettle of the present invention; Figure 5 It is a schematic diagram of the drying hood structure of the present invention; Figure 6 It is a front cross-sectional structure diagram of the drying hood of the present invention; Figure 7 It is a schematic diagram of the bottom structure of the fixed seat of the present invention; Figure 8 For the present invention Figure 3 Enlarged schematic diagram of the structure of part A in

[0020] In the figure: 1. Bottom plate; 11. Movable groove; 12. Driving cylinder; 2. Frame; 3. Reaction kettle; 31. Rotating cylinder; 32. First bearing; 33. Hollow shaft; 34. Second bearing; 35. Sub-gear; 36. Main gear; 37. Stirring motor; 38. Through hole; 39. Stirring rod; 310. Fixed shaft; 311. Crushing roller; 312. Crushing chamber; 313. Feed hopper; 314. Connecting frame; 315. Liquid discharge pipe; 316. Liquid discharge valve; 4. Jacket; 41. Heating wire; 42. Air outlet pipe; 43. Blower; 5. Drying hood; 51. Rectangular groove 51; 52. Lifting cylinder; 53. Lifting mechanism; 531. Lifting plate; 532. Groove; 533. Lifting block; 534. Pin shaft; 535. Torsion spring; 54. Fixed seat; 55. Air guide groove; 56. Rotating shaft; 57. Third bearing; 58. Drying motor; 59. Cross bar; 510. Poking rod; 6. Suction filtration box; 61. Filtrate drain port; 62. Washing liquid drain port; 63. Drain valve; 64. Filter plate; 65. Side ear; 66. Filter hole; 67. Support; 68. Filtrate collection box; 69. Washing liquid collection box; 7. Movable plate; 8. Vacuum pump; 9. Acid liquid storage tank; 91. Liquid inlet pipe; 92. Acid liquid pump. Detailed Description of the Invention

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] Such as Figures 1 to 8As shown in the figure, the silica powder purification system of this embodiment includes a bottom plate 1, a frame 2 installed on the upper surface of the bottom plate 1, a reaction kettle 3 installed on the upper surface of the frame 2, a suction filtration box 6 installed below the reaction kettle 3, a vacuum pump 8 connected to one side of the suction filtration box 6, an acid solution storage tank 9 installed on one side of the bottom plate 1, a liquid inlet pipe 91 connected between the acid solution storage tank 9 and the reaction kettle 3, and an acid solution pump 92 installed on the liquid inlet pipe 91. The vacuum pump 8 is connected to the suction filtration box 6 through a pipeline to perform vacuum suction on the suction filtration box 6. A jacket 4 is installed on the outer side wall of the reaction kettle 3 for installing the heating wire 41 used for acid leaching of the reaction kettle 3. A drying hood 5 is installed on one side of the jacket 4 for drying the filtered silica powder filter cake. A rotating cylinder 31 is installed at the center inside the reaction kettle 3. The upper surface of the rotating cylinder 31 is in contact with the top of the inner cavity of the reaction kettle 3, so that the feed hopper 313 is directly communicated with the inner cavity of the rotating cylinder 31. A first bearing 32 is installed between the top of the rotating cylinder 31 and the inner wall of the reaction kettle 3. A hollow shaft 33 is integrally connected to the bottom of the rotating cylinder 31. A second bearing 34 is installed between the hollow shaft 33 and the bottom surface of the reaction kettle 3. The second bearing 34 uses an acid-resistant and high-temperature-resistant sealed bearing, which can ensure that the reaction kettle 3 will not leak acid solution. A secondary gear 35 is sleeved outside the hollow shaft 33 below the second bearing 34. A main gear 36 is installed inside the reaction kettle 3 on one side of the secondary gear 35. The bottom of the main gear 36 is connected to a stirring motor 37. The stirring motor 37 is installed on the lower surface of the reaction kettle 3. The shaft end of the stirring motor 37 is connected to the main gear 36. And the stirring motor 37 serves as both the driving force for acid leaching stirring and the driving force for silica powder crushing and screening. Through holes 38 are formed through the side wall of the rotating cylinder 31 for screening out the silica powder with a suitable particle size after crushing. A stirring rod 39 is connected to the outer side wall of the rotating cylinder 31 for stirring the silica powder immersed in the acid solution and the acid solution, so as to promote the full reaction of the acid and the metal oxide impurities in the silica powder. A fixed shaft 310 passes through the rotating cylinder 31 at the center inside the reaction kettle 3. A crushing roller 311 is sleeved outside the fixed shaft 310. Crushing blades are arranged on the surface of the crushing roller 311. The bottom of the fixed shaft 310 is fixedly connected to the reaction kettle 3, so that when the rotating cylinder 31 rotates relative to the reaction kettle 3, it also rotates synchronously relative to the fixed shaft 310. The rotating cylinder 31 then drives the silica powder inside to rotate relative to the crushing roller 311 for crushing. The top of the reaction kettle 3 is connected to a feed hopper 313. A connecting frame 314 is connected between the top of the fixed shaft 310 and the inner wall of the feed hopper 313 for fixing and supporting the fixed shaft 310. The bottom of the reaction kettle 3 is connected to a liquid outlet pipe 315. A liquid outlet valve 316 is installed on the liquid outlet pipe 315 for discharging the mixture formed after acid leaching from the reaction kettle 3.

[0025] Specifically, both the rotating cylinder 31 and the hollow shaft 33 are in the shape of internally hollow cylinders. The main gear 36 is meshed and connected with the sub-gear 35. The rotating cylinder 31 and the hollow shaft 33 are respectively rotationally connected to the reaction kettle 3 through the first bearing 32 and the second bearing 34. The upper part of the rotating cylinder 31 is communicated with the feed hopper 313. The main gear 36 is driven to rotate by the stirring motor 37. The main gear 36 drives the sub-gear 35 to rotate. The sub-gear 35 drives the rotating cylinder 31 to rotate through the hollow shaft 33.

[0026] Furthermore, the bottom of the fixed shaft 310 passes through the hollow shaft 33 and is connected to the inner wall of the reaction kettle 3. The top of the fixed shaft 310 passes through the rotating cylinder 31 and is connected to the feed hopper 313 through the connecting frame 314. The width of the connecting frame 314 is relatively narrow and will not affect the feeding of silica powder from the feed hopper 313. The upper half of the crushing roller 311 is in the shape of a cone with an outer diameter that gradually widens from narrow to wide, which is used for guiding the silica powder so that the silica powder enters the crushing chamber 312. And the lower half is in the shape of a cylinder. There is a gap between the crushing roller 311 and the inner wall of the rotating cylinder 31 to form the crushing chamber 312. The crushing chamber 312 is communicated with the inner cavity of the reaction kettle 3 through the through hole 38. When the rotating cylinder 31 rotates, it drives the silica powder to rotate relative to the crushing roller 311, and the crushing roller 311 is used to crush the silica powder. The silica powder within the appropriate particle size range generates centrifugal force as it rotates with the rotating cylinder 31 and is thrown into the reaction kettle 3 from the through hole 38, realizing the automatic crushing and screening of the silica powder.

[0027] Furthermore, the drying hood 5 is in an inverted U shape. The drying hood 5 is connected to the side wall of the jacket 4. Rectangular slots 51 are respectively provided through the middle parts of the left and right side walls of the drying hood 5. Lifting cylinders 52 are installed inside the two rectangular slots 51. Lifting mechanisms 53 are installed on the sides of the moving parts of the two lifting cylinders 52 that are close to each other. The number of the lifting mechanisms 53 is two, and they are symmetrically arranged relative to the drying hood 5. And the two lifting mechanisms 53 penetrate through the drying hood 5 for lifting and lowering. The lower surface of the middle part of the drying hood 5 is connected with a fixed seat 54. The fixed seat 54 is in the shape of a rectangular block. A wind guiding groove 55 is provided through the inside of the fixed seat 54, which is used for guiding the hot air introduced into the fixed seat 54 so that the hot air blows the filter cake evenly. A rotating shaft 56 is provided through the center of the fixed seat 54. A third bearing 57 is installed between the rotating shaft 56 and the fixed seat 54. The bottom of the rotating shaft 56 extends out from the lower surface of the fixed seat 54 and is vertically connected with a cross bar 59. A dial rod 510 is connected to the bottom of the cross bar 59. The dial rods 510 at the bottom of the cross bar 59 are arranged at equal intervals, and the dial rods 510 at the bottom of the two cross bars 59 are arranged staggeredly.

[0028] Furthermore, a heating wire 41 is installed inside the jacket 4, and an air outlet pipe 42 is connected to the upper surface of the jacket 4 on one side close to the drying hood 5. The air outlet pipe 42 passes over the drying hood 5 and is connected to the center of the upper surface of the drying hood 5. The air outlet pipe 42 uses a heat-insulating material, and a blower 43 is installed on the side wall of the other side of the jacket 4. The heating wires 41 are evenly arranged in a spiral shape on the outer wall of the reactor 3. The heat generated by the heating wires 41 in the interlayer can be used to heat the reactor 3 and can also be used to perform hot air drying on the filtered silicon micropowder filter cake. The air outlet pipe 42 has a rectangular longitudinal section, one end of the air outlet pipe 42 is connected to the jacket 4, and the other end of the air outlet pipe 42 passes through the drying hood 5 and is connected to the inner cavity of the fixed seat 54. The blower 43 blows air into the interlayer, and the air circulation carries the heat generated by the heating wire 41 into the air outlet pipe 42, and the hot air enters the fixed seat 54 and is guided by the air guide groove 55 and then blown into the filter plate 64, so that the filter cake filtered out on the filter plate 64 is dried with hot air.

[0029] Furthermore, the cross-section of the air guide grooves 55 is circular and is equidistantly arranged in the fixed seat 54. The top of the rotating shaft 56 passes through the drying hood 5 and extends from the upper surface of the air outlet pipe 42 and is connected to a drying motor 58. The drying motor 58 is installed on the upper surface of the air outlet pipe 42 above the drying hood 5. The rotating shaft 56 is rotatably connected to the fixed seat 54 via a third bearing 57. There are two cross bars 59, which are symmetrically installed on the left and right side walls of the rotating shaft 56. The rotating shaft 56 is driven to rotate by the drying motor 58, and the rotating shaft 56 drives the cross bar 59 to rotate relative to the fixed seat 54. The cross bar 59 drives the lever 510 to rotate. The lever 510 stirs the filter cake so that the silicon micropowder is dispersed by the stirring and evenly heated, thereby accelerating the drying speed of the silicon micropowder filter cake.

[0030] Furthermore, the lifting mechanism 53 includes a lifting plate 531 installed on the moving part of the lifting cylinder 52. A groove 532 is opened at the bottom of the lifting plate 531 to facilitate the lifting block 533 to flip upward and insert into the lifting plate 531. The lifting block 533 is installed inside the groove 532. A pin shaft 534 is arranged between the bottom of the lifting block 533 and the lifting plate 531. A torsion spring 535 is sleeved on the outer side of the pin shaft 534. The lifting block 533 is rotatably connected to the lifting plate 531 via the pin shaft 534. When the torsion spring 535 is in a normal tension state, the lifting block 533 is perpendicular to the lifting plate 531. The distance between the two lifting blocks 533 is smaller than the distance between the outer edges of the two side ears 65. After the lifting block 533 moves to the bottom of the side ear 65, the side ear 65 can be pushed to move upward. The bottom of the groove 532 is horizontal, and the maximum extent of the lifting block 533 flipping downward relative to the lifting plate 531 is also in a horizontal state.

[0031] Further, a filtrate drain port 61 is provided at the bottom of the suction filtration box 6 for discharging the filtrate filtered out in the suction filtration box 6. A washing liquid drain port 62 is provided on one side of the filtrate drain port 61 for discharging the washing liquid generated by washing the filter cake multiple times. Drain valves 63 are installed on both the filtrate drain port 61 and the washing liquid drain port 62. A filter plate 64 is movably inserted into the suction filtration box 6. Side ears 65 are integrally connected to both the left and right sides of the filter plate 64. The filter plate 64 is sleeved on the suction filtration box 6 through the side ears 65. A sealing gasket is laid on the outer side wall around the filter plate 64 for sealing between the filter plate 64 and the inner wall of the suction filtration box 6 after the filter plate 64 is inserted into the suction filtration box 6 to maintain the effect of vacuum suction. Filter holes 66 are penetrated through the bottom surface of the filter plate 64. In actual use of the suction filtration box 6 for suction filtration, a disposable filter membrane is usually laid on the filter holes 66, which is a common suction filtration method. The filter membrane is used to separate the filtrate and silicon micro-powder in the mixture, so that the silicon micro-powder forms a filter cake on the filter membrane. The bottom of the suction filtration box 6 is connected to a support 67, and the bottom of the support 67 is connected to a movable plate 7. A filtrate collection box 68 is movably placed on the upper surface of the movable plate 7 below the suction filtration box 6. A washing liquid collection box 69 is movably placed on the upper surface of the movable plate 7 on one side of the filtrate collection box 68. The filter plate 64 is in the shape of a rectangular box, and the width dimension of the filter plate 64 is adapted to the width dimension of the inner wall of the suction filtration box 6. The filter plate 64 is movably inserted into the suction filtration box 6, and the side ears 65 are placed on the upper surface of the suction filtration box 6. By designing the filter plate 64 to be movably inserted into the suction filtration box 6, the previous fixed method of the filter plate 64 in the suction filtration box 6 is changed, so that the filter plate 64 can be taken out of the suction filtration box 6, which is convenient for taking out the filter cake for drying.

[0032] Further, a movable groove 11 is provided on the upper surface of the bottom plate 1. A driving cylinder 12 is installed inside the bottom plate 1 below the movable groove 11. The movable plate 7 is inserted into the movable groove 11 and forms a sliding connection with the bottom plate 1. The movable plate 7 is connected to the upper surface of the moving part of the driving cylinder 12. When the movable plate 7 moves to the leftmost side of the movable groove 11, the suction filtration box 6 is just directly below the reaction kettle 3. When the movable plate 7 moves to the rightmost side of the movable groove 11, the suction filtration box 6 is just directly below the drying hood 5. Thus, the position of the suction filtration box 6 below the reaction kettle 3 and the drying hood 5 is switched, realizing the automatic transfer of silicon micro-powder and increasing the automation degree of silicon micro-powder purification. During the purification process, there is no need for manual interference between multiple steps.

[0033] The usage method of this embodiment is as follows: When the user actually uses the silica powder purification system to purify silica powder by the acid method, first select silica powder with uniform particle size and relatively low impurity content, and then pour the silica powder particles from the feed hopper 313 into the rotating cylinder 31. The silica powder falls into the crushing chamber 312 through the upper half of the crushing roller 311. At the same time, start the stirring motor 37. The stirring motor 37 drives the main gear 36 to rotate, the main gear 36 drives the sub-gear 35 to rotate, and the sub-gear 35 drives the rotating cylinder 31 to rotate through the hollow shaft 33, so that the rotating cylinder 31 drives the silica powder inside to rotate relative to the crushing roller 311, and the crushing roller 311 is used to crush the silica powder. The silica powder within the appropriate particle size range generates centrifugal force as it rotates with the rotating cylinder 31 and is thrown into the reaction kettle 3 through the through hole 38. The larger particle size silica powder particles continue to be crushed in the crushing chamber 312 until they can pass through the through hole 38 and enter the reaction kettle 3. Then start the acid liquid pump 92. The acid liquid pump 92 passes the acid liquid pre-prepared in the acid liquid storage tank 9 into the reaction kettle 3 through the liquid inlet pipe 91. The silica powder is immersed in the acid liquid. At the same time, the heating wire 41 is turned on to generate heat, providing a good reaction environment for the acid liquid in the reaction kettle 3. The rotation of the rotating cylinder 31 drives the stirring rod 39 to rotate, and the stirring rod 39 stirs the acid liquid and the silica powder, enabling the acid liquid to fully react with the metal oxide impurities in the silica powder. After the acid leaching is completed, lay a filter membrane in the filter plate 64, and then open the liquid outlet valve 316 so that the mixed solution in the reaction kettle 3 flows into the filter plate 64 in the suction filtration box 6 through the liquid outlet pipe 315. Then start the vacuum pump 8. The vacuum pump 8 sucks through the pipeline to the suction filtration box 6. A negative pressure is generated below the filter plate 64, enabling the filtrate to quickly pass through the filter membrane and the filter plate 64 and flow downward. The filtrate flows into the filtrate collection box 68 through the filtrate drain port 61 for collection. The filtered silica powder forms a filter cake on the upper surface of the filter membrane. After the filtration is completed, pass distilled water into the filter plate 64 multiple times. The distilled water washes the filter cake multiple times to remove the residual acid liquid on the surface of the filter cake. The washing water passes through the filter membrane and the filter holes 66 and finally drains into the washing liquid collection box 69 through the washing liquid drain port 62 for collection. After the filter cake washing is completed, start the driving cylinder 12. The driving cylinder 12 drives the movable plate 7 to slide in the movable groove 11. The movable plate 7 drives the suction filtration box 6 to move from below the reaction kettle 3 to below the drying hood 5. Then start the lifting cylinder 52. The lifting cylinder 52 drives the lifting plate 531 to drive the lifting block 533 to move downward. When the lifting block 533 passes by the side ear 65, the lifting block 533 is squeezed by the side ear 65 and turns upward around the pin shaft 534 and inserts into the groove 532. At this time, the torsion spring 535 generates a resilience force. After the lifting block 533 passes over the side ear 65, the torsion spring 535 rebounds and pushes the lifting block 533 to rotate back to a horizontal state. At this time, the lifting block 533 is below the side ear 65. Then the lifting cylinder 52 drives the lifting plate 531 to move upward. The lifting plate 531 drives the lifting block 533 to move upward. The lifting block 533 pushes the filter plate 64 to move upward through the side ear 65, so that the filter plate 64 is pulled out of the suction filtration box 6. When the lifting plate 531 moves to the highest position,The lifting block 533 drives the side ear 65 to move upward until the upper surface of the side ear 65 contacts the bottom of the drying hood 5, and the fixed seat 54 is inserted into the filter plate 64, and then the blower 43 is started. The blower 43 blows air to the inside of the interlayer, and the air circulation carries the heat generated by the heating wire 41 into the air outlet pipe 42. The hot air enters the fixed seat 54 and is guided by the air guide groove 55 and then blown into the filter plate 64, and the filter cake filtered out of the filter plate 64 is dried with hot air. At the same time, the drying motor 58 drives the rotating shaft 56 to rotate, and the rotating shaft 56 drives the cross bar 59 to rotate relative to the fixed seat 54. The cross bar 59 drives the lever 510 to rotate, and the lever 510 stirs the filter cake so that the silicon micropowder is dispersed by the stirring and evenly heated. After the drying is completed, the silicon micropowder in the filter plate 64 is taken out and the filter plate 64 is removed from the lifting block 533 and reinserted into the filter box 6.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A silicon micropowder purification system, comprising a bottom plate (1), a frame (2) installed on the upper surface of the bottom plate (1), a reaction kettle (3) installed on the upper surface of the frame (2), a suction filtration box (6) installed below the reaction kettle (3), a vacuum pump (8) connected to one side of the suction filtration box (6), an acid solution storage tank (9) installed on one side of the bottom plate (1), a liquid inlet pipe (91) connected between the acid solution storage tank (9) and the reaction kettle (3), and an acid solution pump (92) installed on the liquid inlet pipe (91), characterized in that: A jacket (4) is installed on the outer side wall of the reactor (3), a drying hood (5) is installed on one side of the jacket (4), a rotating cylinder (31) is installed at the center inside the reactor (3), a first bearing (32) is installed between the top of the rotating cylinder (31) and the inner wall of the reactor (3), a hollow shaft (33) is integrally connected to the bottom of the rotating cylinder (31), a second bearing (34) is installed between the hollow shaft (33) and the bottom surface of the reactor (3), a secondary gear (35) is sleeved outside the hollow shaft (33) below the second bearing (34), a main gear (36) is installed inside the reactor (3) on one side of the secondary gear (35), a stirring motor (37) is connected to the bottom of the main gear (36), through holes (38) are formed through the side wall of the rotating cylinder (31), stirring rods (39) are connected to the outer side wall of the rotating cylinder (31), a fixed shaft (310) is connected through the rotating cylinder (31) at the center inside the reactor (3), a crushing roller (311) is sleeved outside the fixed shaft (310), a feed hopper (313) is connected to the top of the reactor (3), a connecting frame (314) is connected between the top of the fixed shaft (310) and the inner wall of the feed hopper (313), a liquid outlet pipe (315) is connected to the bottom of the reactor (3), and a liquid outlet valve (316) is installed on the liquid outlet pipe (315).

2. The silica powder purification system according to claim 1, wherein: Both the rotating cylinder (31) and the hollow shaft (33) are in the shape of internally hollow cylinders, the main gear (36) is meshed with the secondary gear (35), the rotating cylinder (31) and the hollow shaft (33) are respectively rotationally connected to the reactor (3) through the first bearing (32) and the second bearing (34), and the upper part of the rotating cylinder (31) is communicated with the feed hopper (313).

3. The silica powder purification system according to claim 1, wherein: The bottom of the fixed shaft (310) passes through the hollow shaft (33) and is connected to the inner wall of the reactor (3), the top of the fixed shaft (310) passes through the rotating cylinder (31) and is connected to the feed hopper (313) through the connecting frame (314), the upper half of the crushing roller (311) is in the shape of a cone with an outer diameter gradually becoming wider from narrow, and the lower half is in the shape of a cylinder. There is a gap between the crushing roller (311) and the inner wall of the rotating cylinder (31) to form a crushing chamber (312), and the crushing chamber (312) is communicated with the inner cavity of the reactor (3) through the through hole (38).

4. The silica powder purification system according to claim 1, characterized in that: The drying hood (5) is in an inverted U shape. Rectangular grooves (51) are respectively formed through the middle parts of the left and right side walls of the drying hood (5). Lifting cylinders (52) are installed inside the two rectangular grooves (51). Lifting mechanisms (53) are installed on the sides of the moving parts of the two lifting cylinders (52) close to each other. A fixing seat (54) is connected to the lower surface of the middle part of the drying hood (5). An air guiding groove (55) is formed through the fixing seat (54). A rotating shaft (56) is arranged through the center of the fixing seat (54). A third bearing (57) is installed between the rotating shaft (56) and the fixing seat (54). The bottom of the rotating shaft (56) extends out from the lower surface of the fixing seat (54) and is vertically connected with a cross bar (59). A shifting rod (510) is connected to the bottom of the cross bar (59).

5. The silica powder purification system according to claim 4, characterized in that: Heating wires (41) are installed inside the jacket (4). An air outlet pipe (42) is connected to the upper surface of the side of the jacket (4) close to the drying hood (5). A blower (43) is installed on the side wall of the other side of the jacket (4). The heating wires (41) are spirally and evenly arranged on the outer side wall of the reaction kettle (3). The longitudinal section of the air outlet pipe (42) is rectangular. One end of the air outlet pipe (42) is communicated with the jacket (4), and the other end of the air outlet pipe (42) passes through the drying hood (5) and is communicated with the inner cavity of the fixing seat (54).

6. The silica powder purification system according to claim 4, wherein: The cross section of the air guiding groove (55) is circular and is arranged at equal intervals inside the fixing seat (54). The top of the rotating shaft (56) passes through the drying hood (5) and extends out from the upper surface of the air outlet pipe (42) and is connected with a drying motor (58). The rotating shaft (56) is rotationally connected with the fixing seat (54) through the third bearing (57). The number of the cross bars (59) is two, and they are symmetrically installed on the left and right side walls of the rotating shaft (56).

7. The silica powder purification system according to claim 4, wherein: The lifting mechanism (53) includes a lifting plate (531) installed on the moving part of the lifting cylinder (52). A groove (532) is formed through the bottom of the lifting plate (531). A lifting block (533) is installed inside the groove (532). A pin shaft (534) is arranged through between the bottom of the lifting block (533) and the lifting plate (531). A torsion spring (535) is sleeved outside the pin shaft (534). The lifting block (533) is rotationally connected with the lifting plate (531) through the pin shaft (534). When the torsion spring (535) is in a normal tensile state, the lifting block (533) is perpendicular to the lifting plate (531).

8. The silica powder purification system according to claim 1, wherein: The bottom of the suction filtration box (6) is provided with a filtrate drain port (61), and a washing liquid drain port (62) is provided on one side of the filtrate drain port (61). Drain valves (63) are installed on both the filtrate drain port (61) and the washing liquid drain port (62). A filter plate (64) is movably inserted into the suction filtration box (6). Side ears (65) are integrally connected to both the left and right sides of the filter plate (64). Filter holes (66) are vertically formed in the bottom surface of the filter plate (64). The bottom of the suction filtration box (6) is connected to a support (67), and the bottom of the support (67) is connected to a movable plate (7). A filtrate collection box (68) is movably placed on the upper surface of the movable plate (7) below the suction filtration box (6), and a washing liquid collection box (69) is movably placed on the upper surface of the movable plate (7) on one side of the filtrate collection box (68). The filter plate (64) is in the shape of a rectangular box, and the width dimension of the filter plate (64) is adapted to the width dimension of the inner wall of the suction filtration box (6). The filter plate (64) is movably inserted into the suction filtration box (6), and the side ears (65) are placed on the upper surface of the suction filtration box (6).

9. The silica powder purification system according to claim 8, wherein: An activity groove (11) is formed in the upper surface of the bottom plate (1), and a driving cylinder (12) is installed inside the bottom plate (1) below the activity groove (11). The movable plate (7) is inserted into the activity groove (11) and forms a sliding connection with the bottom plate (1). The movable plate (7) is connected to the upper surface of the moving part of the driving cylinder (12).

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