A purification device for lithium hexafluorophosphate

Abstract

The present invention discloses a purification device for lithium hexafluorophosphate, including a purification tower, a material bulk tray is arranged on the upper part; a multifunctional feeding mechanism, including a feed pipe, the bottom side of which is connected to a guide tray arranged at intervals with the material bulk tray; a material kinetic energy lifting mechanism, including a plurality of ultrasonic transducers evenly arranged on the guide tray; a hot nitrogen gas intake mechanism, including a hot nitrogen gas conduit fixed to the middle part of the purification tower, a plurality of hot nitrogen gas intake pipes are arranged in the middle part of the hot nitrogen gas conduit, and a plurality of hot nitrogen gas injection pipes are arranged in an arc shape on the bottom surface; a collecting hopper is arranged at the bottom of the purification tower, and a plurality of isolation plates are fixed to the outer wall of the collecting hopper, and hot nitrogen gas permeable holes are evenly arranged on the collecting hopper corresponding to the isolation plates. The present invention can effectively enable lithium hexafluorophosphate to be more fully in contact with the circulating hot nitrogen, thereby significantly improving the purification effect of lithium hexafluorophosphate products.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment for purifying and processing lithium hexafluorophosphate, and in particular to a lithium hexafluorophosphate purification device, which can effectively and continuously purify lithium hexafluorophosphate. Background Art

[0002] Lithium hexafluorophosphate (LiPF6) appears as white crystals or powders, and is easily soluble in water and low-concentration organic solvents such as methanol, ethanol and acetone. LiPF6 is one of the key and new materials for manufacturing lithium-ion batteries due to its excellent electrochemical properties. At present, the hydrogen fluoride solvent method is the main production method, which uses anhydrous HF as a solvent to dissolve the synthesized LiPF6 product, and then obtains crystalline LiPF6 through recrystallization, HF washing and drying. Therefore, the finished product of LiPF6 inevitably contains hydrogen fluoride impurities, which will reduce the performance of lithium-ion batteries.

[0003] The existing purification methods of LiPF6 mainly include recrystallization and thermal drying. The recrystallization method is to dissolve LiPF6 in ether, dimethyl carbonate or diethyl carbonate at a certain temperature, then lower the temperature to recrystallize LiPF6 from the organic solvent, and vacuum dry the filtered LiPF6 crystals to obtain the final product. This process requires the use of a large amount of organic solvents, which increases production costs. The thermal drying method is to directly heat and purify the crude LiPF6 product, which is a purification method suitable for large-scale production, but the main problem is how to avoid that every particle of the crude LiPF6 product can be fully exposed to the vacuum atmosphere during the heating process, so that there is no problem of hydrogen fluoride inclusion in the final LiPF6 product.

[0004] Therefore, the research purpose of the present invention is to design a lithium hexafluorophosphate purification device that can effectively allow lithium hexafluorophosphate to be more fully contacted with the circulating hot nitrogen, thereby significantly improving the purification effect of the lithium hexafluorophosphate product. Summary of the invention

[0005] In view of the technical problems existing in the above-mentioned prior art, the present invention provides a purification device for lithium hexafluorophosphate, which can effectively solve the technical problems existing in the above-mentioned prior art.

[0006] The technical solution of the present invention is:

[0007] A lithium hexafluorophosphate purification device comprising

[0008] A purification tower, with a material bulk tray disposed on the upper portion, the material bulk tray being connected to the output shaft end of a drive motor installed on the top of the purification tower through a corresponding drive shaft;

[0009] A multifunctional feeding mechanism, comprising a feeding pipe fixedly sleeved on the outside of the driving shaft in an interval state, wherein the bottom side of the feeding pipe is connected to a guide plate spaced apart from the upper surface of the material bulk plate;

[0010] The material kinetic energy lifting mechanism comprises a plurality of ultrasonic transducers evenly distributed on the material guide plate, and the ultrasonic transducers are respectively connected to an external ultrasonic generator;

[0011] The hot nitrogen inlet mechanism comprises a hot nitrogen conduit fixedly connected to the middle of the purification tower, the cross section of the hot nitrogen conduit is arranged in a triangular shape, a plurality of corresponding hot nitrogen inlet pipes are evenly arranged inwardly from the middle of the hot nitrogen conduit, corresponding baffle blocks are fixedly arranged at the outlet ends of the hot nitrogen inlet pipes, a plurality of corresponding hot nitrogen jet pipes are distributed in an arc shape on the bottom surface of the hot nitrogen conduit, and the rotation directions of the hot nitrogen jet pipes are consistent;

[0012] A collecting hopper is arranged at the bottom of the purification tower. A discharge pipe with a discharge valve is arranged outward from the bottom of the collecting hopper. The outer wall of the collecting hopper is sealed and fixedly connected outward at equal angles with a plurality of spherical isolation plates. A plurality of corresponding hot nitrogen air holes are evenly distributed on the collecting hopper corresponding to the isolation plates. The isolation plates and the hot nitrogen conduit are respectively pumped to an external hot nitrogen source.

[0013] The upper part of the discharge pipe is tilted outwardly and connected with a corresponding discharge auger, and a corresponding discharge hopper is fixedly provided at the feeding end of the discharge auger.

[0014] The top of the purification tower is connected to the outside and is provided with a corresponding exhaust pipe, on which a corresponding filter is fixedly installed.

[0015] The filter comprises a filter cartridge which is detachably mounted in the exhaust pipe, and the filter cartridge is filled with corresponding filter cotton.

[0016] The guide plate is fixedly mounted with corresponding mounting seats at positions corresponding to the ultrasonic transducers. The bottom surface of the mounting seats is spherical and extends to the gap between the guide plate and the material bulk plate.

[0017] The mounting seat is located on the material guide disk and is evenly provided with a plurality of corresponding vibration-damping microholes. The ultrasonic transducer is fixedly sleeved on the mounting seat through a corresponding buffer rubber tube, and the bottom end of the ultrasonic transducer is fixedly abutted against the bottom end of the mounting seat.

[0018] An isolation cover for isolating the upper space of the material guide tray is fixedly installed on the upper part of the material guide tray.

[0019] Corresponding clearing devices are respectively arranged in the isolation plates, and the clearing devices include clearing plates connected to the isolation plates through elastic parts, and pushing needles adapted to the hot nitrogen air holes are fixedly connected to the clearing plates, and corresponding electromagnets are respectively fixedly installed on the clearing plates, and the collecting hopper is made of magnetic metal material.

[0020] The isolation plates are respectively fixed with corresponding pressure sensors. When the pressure value detected by the pressure sensors is greater than the set value p1, the electromagnet is energized and adsorbed onto the side wall of the collecting hopper, and the push needles penetrate through the corresponding hot nitrogen vents to perform blockage clearing operations.

[0021] The bottom of the isolation plate is connected to the discharge pipe through corresponding one-way valves. When the electromagnet is energized, the one-way valve opens, and the remaining material in the isolation plate is transported to the discharge pipe for discharge.

[0022] Advantages of the present invention:

[0023] 1) The present invention evenly throws out the material through the material dispersing plate. During the process of evenly throwing out the material, the material can directly or indirectly come into contact with the ultrasonic transducer. Under the ultrasonic vibration of the ultrasonic transducer, the dispersion degree of the thrown-out material can be ensured, and the material evenly entering the purification tower can have a certain kinetic energy, so that it can form a more sufficient contact with the rising high-temperature nitrogen, so as to ensure that the impurity water and hydrofluoric acid on the surface of the lithium hexafluorophosphate particles will be fully heated and vaporized and taken away, thereby significantly improving the purification effect of the lithium hexafluorophosphate product.

[0024] 2) The hot nitrogen inlet mechanism of the present invention comprises a hot nitrogen conduit fixedly connected to the middle of the purification tower, and a plurality of hot nitrogen inlet pipes arranged in the middle of the hot nitrogen conduit. The most important thing is that the outlet ends of the hot nitrogen inlet pipes are respectively fixedly provided with corresponding baffles. Under the action of the baffles, the high-temperature nitrogen is ejected inward in a turbulent state to form a tumbling of the material, thereby further improving the kinetic energy of the material and the contact rate between the material and the high-temperature nitrogen, so as to further improve the purification effect of the lithium hexafluorophosphate product.

[0025] 3) The bottom surface of the hot nitrogen conduit of the present invention is provided with a plurality of corresponding hot nitrogen jet pipes distributed in an arc shape, and the rotation directions of the hot nitrogen jet pipes are consistent, so as to form a vortex in the lower area of ​​the hot nitrogen conduit, thereby increasing the residence time of the material with increased kinetic energy on the lower side of the hot nitrogen conduit, thereby effectively further increasing the contact rate between the material and the high-temperature nitrogen, so as to further improve the purification effect of the lithium hexafluorophosphate product.

[0026] 4) The outer wall of the collecting hopper of the present invention is sealed and fixedly connected with a plurality of spherical isolation plates at equal angles. The collecting hoppers corresponding to the isolation plates are evenly provided with a plurality of corresponding hot nitrogen vents. During the discharge of the purified material, the high-temperature nitrogen from the outside is blown into the purification tower through the hot nitrogen vents. On the one hand, the purification effect of the material can be further improved; on the other hand, it can effectively prevent the material from being compacted and piled up in the collecting hopper, resulting in unsmooth discharge.

[0027] 5) The material guide disk of the present invention is fixedly installed with corresponding mounting seats at positions corresponding to the ultrasonic transducers, and the bottom surface of the mounting seats is spherical and extends to the gap between the material guide disk and the material bulk disk, so as to ensure that the ultrasonic vibration can be fully transmitted to the material that is evenly thrown out; the mounting seat of the present invention is evenly distributed on the material guide disk and has a plurality of corresponding vibration-damping microholes, and the ultrasonic transducer is fixedly sleeved on the mounting seat through a corresponding buffer rubber tube, and the bottom end of the ultrasonic transducer is fixedly abutted against the bottom end of the mounting seat, thereby ensuring the outward transmission amount of the ultrasonic vibration, and under the vibration isolation of the buffer rubber tube and the resonance energy consumption of the vibration-damping microholes, the transmission amount of the ultrasonic vibration to the material guide disk can be reduced, so as to effectively ensure the practical effect of the present invention.

[0028] 6) The isolation plates of the present invention are respectively provided with corresponding clearing devices and pressure sensors. When the pressure value detected by the pressure sensor is greater than the set value p1, it can be determined that some of the hot nitrogen vents are blocked. At this time, the electromagnet is energized to drive the clearing plate inward, so that the push pins provided on the clearing plate pass through the corresponding hot nitrogen vents, respectively, to automatically perform the clearing operation, thereby further effectively ensuring the practical effect of the present invention.

[0029] 7) The bottom of the isolation plate of the present invention is connected to the discharge pipe of the purification tower through the corresponding one-way valve. When the electromagnet is energized, the one-way valve opens, and high-temperature nitrogen continues to be filled in, so that the remaining material in the isolation plate can be transported to the discharge pipe under positive pressure for discharge, thereby further effectively ensuring the practical effect of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of the present invention.

[0031] Figure 2 It is a cross-sectional view of the present invention.

[0032] Figure 3 It is a structural schematic diagram of the multifunctional feeding mechanism.

[0033] Figure 4 It is a structural diagram of the material kinetic energy lifting mechanism.

[0034] Figure 5 It is a structural schematic diagram of the hot nitrogen intake mechanism.

[0035] Figure 6 Schematic diagram of the filter structure.

[0036] Figure 7 This is a schematic diagram of the structure of the plug clearer.

[0037] In the accompanying drawings: purification tower 1, material bulk tray 2, drive shaft 3, drive motor 4, multifunctional feeding mechanism 5, discharge pipe 501, guide plate 502, material kinetic energy lifting mechanism 6, ultrasonic transducer 601, mounting seat 602, buffer rubber cylinder 603, hot nitrogen intake mechanism 7, hot nitrogen conduit 701, hot nitrogen intake pipe 702, hot nitrogen jet pipe 703, baffle block 8, collecting hopper 9, discharge valve 10, discharge pipe 11, isolation plate 12, hot nitrogen air permeability 13, discharge auger 14, discharge hopper 15, exhaust pipe 16, filter 17, filter cartridge 1701, filter cotton 1702, vibration-damping micropores 18, isolation cover 19, blockage remover 20, blockage remover plate 2001, push needle 2002, electromagnet 2003, elastic member 21, one-way valve 22. DETAILED DESCRIPTION

[0038] In order to facilitate understanding by those skilled in the art, the structure of the present invention is further described in detail with reference to the embodiments in conjunction with the accompanying drawings:

[0039] refer to Figure 1-7 , a purification device for lithium hexafluorophosphate, comprising

[0040] The purification tower 1 is provided with a material bulk tray 2 at the top, and the material bulk tray 2 is connected to the output shaft end of the driving motor 4 installed on the top of the purification tower 1 through a corresponding driving shaft 3;

[0041] The multifunctional feeding mechanism 5 comprises a feeding tube 501 fixedly sleeved on the outside of the driving shaft 3 in an interval state, and the bottom side of the feeding tube 501 is connected to a guide plate 502 spaced apart from the upper surface of the material bulk plate 2;

[0042] The material kinetic energy lifting mechanism 6 comprises a plurality of ultrasonic transducers 601 evenly arranged on the material guide plate 502, and the ultrasonic transducers 601 are respectively connected to an external ultrasonic generator;

[0043] The hot nitrogen inlet mechanism 7 comprises a hot nitrogen conduit 701 fixedly connected to the middle of the purification tower 1. The cross section of the hot nitrogen conduit 701 is arranged in a triangular shape. A plurality of corresponding hot nitrogen inlet pipes 702 are evenly arranged inwardly from the middle of the hot nitrogen conduit 701. The outlet ends of the hot nitrogen inlet pipes 702 are respectively fixedly provided with corresponding baffle blocks 8. The bottom surface of the hot nitrogen conduit 701 is arranged in an arc shape with a plurality of corresponding hot nitrogen jet pipes 703. The rotation directions of the hot nitrogen jet pipes 703 are consistent.

[0044] A collecting hopper 9 is arranged at the bottom of the purification tower 1. A discharge pipe 11 equipped with a discharge valve 10 is arranged outward from the bottom of the collecting hopper 9. The outer wall of the collecting hopper 9 is sealed and fixedly connected outward at equal angles with a plurality of spherical isolation plates 12. A plurality of corresponding hot nitrogen air holes 13 are evenly distributed on the collecting hopper 9 corresponding to the isolation plates 12. The isolation plates 12 and the hot nitrogen conduit 701 are respectively pumped to an external hot nitrogen source.

[0045] The present invention evenly throws out the material through the material dispersing plate 2. During the process of the material being evenly thrown out, the material can directly or indirectly come into contact with the ultrasonic transducer 601. Under the ultrasonic vibration of the ultrasonic transducer 601, the dispersion degree of the thrown material can be ensured, and the material evenly entering the purification tower 1 can have a certain kinetic energy, so that it can form a more sufficient contact with the rising high-temperature nitrogen, so as to ensure that the impurity water and hydrofluoric acid on the surface of the lithium hexafluorophosphate particles will be fully heated, vaporized and taken away, thereby significantly improving the purification effect of the lithium hexafluorophosphate product.

[0046] The hot nitrogen inlet mechanism 7 of the present invention comprises a hot nitrogen conduit 701 fixedly connected to the middle of the purification tower 1, and a plurality of hot nitrogen inlet pipes 702 arranged in the middle of the hot nitrogen conduit 701. The most important thing is that the outlet ends of the hot nitrogen inlet pipes 702 are respectively fixedly provided with corresponding baffle blocks 8. Under the action of the baffle blocks 8, the high-temperature nitrogen is ejected inward in a turbulent state to form a tumbling of the material, thereby further improving the kinetic energy of the material and the contact rate between the material and the high-temperature nitrogen, so as to further improve the purification effect of the lithium hexafluorophosphate product.

[0047] The bottom surface of the hot nitrogen conduit 701 of the present invention is provided with a plurality of corresponding hot nitrogen injection pipes 703 distributed in an arc shape, and the hot nitrogen injection pipes 703 have the same rotation direction, so as to form a vortex in the lower area of ​​the hot nitrogen conduit 701, thereby increasing the residence time of the material with increased kinetic energy on the lower side of the hot nitrogen conduit 701, thereby effectively further increasing the contact rate between the material and the high-temperature nitrogen, so as to further improve the purification effect of the lithium hexafluorophosphate product.

[0048] The outer wall of the collecting hopper 9 of the present invention is sealed and fixedly connected with a plurality of spherical isolation plates 12 at equal angles. The collecting hopper 9 corresponding to the isolation plates 12 is evenly provided with a plurality of corresponding hot nitrogen vents 13. During the discharge of the purified material, the external high-temperature nitrogen is blown into the purification tower 1 through the hot nitrogen vents 13. On the one hand, the purification effect of the material can be further improved; on the other hand, it can effectively prevent the material from being compacted and piled up in the collecting hopper 9, which leads to unsmooth discharge.

[0049] The upper part of the discharge pipe 501 is connected to a corresponding discharge auger 14 tilted outward, and a corresponding discharge hopper 15 is fixedly provided at the feeding end of the discharge auger 14. The top of the purification tower 1 is connected outwardly to a corresponding exhaust pipe 16, and a corresponding filter 17 is fixedly installed on the exhaust pipe 16. The filter 17 includes a filter cartridge 1701 detachably installed in the exhaust pipe 16, and the filter cartridge 1701 is filled with a corresponding filter cotton 1702.

[0050] The guide plate 502 is fixedly mounted with corresponding mounting seats 602 at positions corresponding to the ultrasonic transducers 601. The bottom surface of the mounting seats 602 is spherical and extends to the gap between the guide plate 502 and the material bulk plate 2 to ensure that the ultrasonic vibration can be fully transmitted to the material thrown out evenly.

[0051] The mounting seat 602 is located on the guide plate 502 and is evenly provided with a number of corresponding vibration-damping microholes 18. The ultrasonic transducer 601 is fixedly mounted on the mounting seat 602 through a corresponding buffer rubber tube 603. The bottom ends of the ultrasonic transducer 601 are respectively fixedly abutted against the bottom ends of the mounting seat 602, thereby ensuring the outward transmission amount of the ultrasonic vibration, and under the vibration isolation of the buffer rubber tube 603 and the resonance energy consumption of the vibration-damping microholes 18, the transmission amount of the ultrasonic vibration to the guide plate 502 can be reduced, so as to effectively ensure the practical effect of the present invention.

[0052] An isolation cover 19 for isolating the upper space of the material guide tray 502 is fixedly mounted on the upper portion of the material guide tray 502 .

[0053] The isolation plates 12 are respectively provided with corresponding clearing devices 20, and the clearing devices 20 include clearing plates 2001 connected to the isolation plates 12 through elastic members 21, and the clearing plates 2001 are fixedly connected with push pins 2002 adapted to the hot nitrogen air holes 13, and the clearing plates 2001 are respectively fixedly installed with corresponding electromagnets 2003, and the collecting hopper 9 is made of magnetic metal material.

[0054] The isolation plates 12 are respectively fixed with corresponding pressure sensors (not marked). When the pressure value detected by the pressure sensors is greater than the set value p1, the electromagnet 2003 is energized and adsorbed onto the side wall of the collecting hopper 9, and the push needles 2002 penetrate through the corresponding hot nitrogen vents 13 to perform the clearing operation.

[0055] The isolation plate 12 of the present invention is respectively provided with a corresponding clearing device 20 and a pressure sensor. When the pressure value detected by the pressure sensor is greater than the set value p1, it can be determined that part of the hot nitrogen vents 13 are blocked. At this time, the electromagnet 2003 is energized to drive the clearing plate 2001 inward, so that the pushing needles 2002 provided on the clearing plate 2001 pass through the corresponding hot nitrogen vents 13, respectively, to automatically perform the clearing operation, thereby further effectively ensuring the practical effect of the present invention.

[0056] The bottom of the isolation plate 12 is connected to the discharge pipe 11 through the corresponding one-way valve 22. When the electromagnet 2003 is energized, the one-way valve 22 opens, and high-temperature nitrogen continues to be filled in. The remaining material in the isolation plate 12 is transported to the discharge pipe 11 for discharge, thereby further effectively ensuring the practical effect of the present invention.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A purification device for lithium hexafluorophosphate, characterized in that: include A purification tower (1) is provided with a material bulk tray (2) at the top, and the material bulk tray (2) is transmission-connected to the output shaft end of a drive motor (4) installed on the top of the purification tower (1) via a corresponding drive shaft (3); The multifunctional feeding mechanism (5) comprises a feed pipe (501) fixedly sleeved on the outside of the driving shaft (3) in a spaced state, and the bottom side of the feed pipe (501) is connected to a guide plate (502) spaced from the upper surface of the material bulk plate (2); The material kinetic energy lifting mechanism (6) comprises a plurality of ultrasonic transducers (601) evenly distributed on the material guide plate (502), wherein the ultrasonic transducers (601) are respectively connected to an external ultrasonic generator; A hot nitrogen inlet mechanism (7) comprises a hot nitrogen conduit (701) fixedly connected to the middle of the purification tower (1), the cross section of the hot nitrogen conduit (701) being arranged in a triangular shape, a plurality of corresponding hot nitrogen inlet pipes (702) being evenly arranged inwardly from the middle of the hot nitrogen conduit (701), corresponding baffle blocks (8) being fixedly arranged at the outlet ends of the hot nitrogen inlet pipes (702), a plurality of corresponding hot nitrogen jet pipes (703) being distributed in an arc shape on the bottom surface of the hot nitrogen conduit (701), and the hot nitrogen jet pipes (703) having the same rotation direction; A collecting hopper (9) is arranged at the bottom of the purification tower (1), and a discharge pipe (11) equipped with a discharge valve (10) is arranged outward from the bottom of the collecting hopper (9). The outer wall of the collecting hopper (9) is sealed and fixedly connected outward at equal angles to a plurality of spherical isolation plates (12). The collecting hopper (9) corresponding to the isolation plates (12) is evenly distributed with a plurality of corresponding hot nitrogen air holes (13). The isolation plates (12) and the hot nitrogen conduit (701) are respectively pumped to an external hot nitrogen source.

2. A lithium hexafluorophosphate purification device according to claim 1, characterized in that: The upper portion of the discharge pipe (501) is tilted outwardly and connected to a corresponding discharge auger (14), and a corresponding discharge hopper (15) is fixedly provided at the feeding end of the discharge auger (14).

3. A lithium hexafluorophosphate purification device according to claim 2, characterized in that: The top of the purification tower (1) is connected to the outside and is provided with a corresponding exhaust pipe (16), and a corresponding filter (17) is fixedly mounted on the exhaust pipe (16).

4. A lithium hexafluorophosphate purification device according to claim 3, characterized in that: The filter (17) comprises a filter cartridge (1701) which is detachably mounted in the exhaust pipe (16), and the filter cartridge (1701) is filled with corresponding filter cotton (1702).

5. A lithium hexafluorophosphate purification device according to claim 1, characterized in that: The guide plate (502) is fixedly mounted with corresponding mounting seats (602) at positions corresponding to the ultrasonic transducers (601), and the bottom surface of the mounting seats (602) is spherically arranged and extends to the gap between the guide plate (502) and the material bulk plate (2).

6. A lithium hexafluorophosphate purification device according to claim 5, characterized in that: The mounting seat (602) is located on the material guide plate (502) and is evenly provided with a plurality of corresponding vibration-damping microholes (18); the ultrasonic transducer (601) is fixedly sleeved on the mounting seat (602) via a corresponding buffer rubber tube (603); and the bottom end of the ultrasonic transducer (601) is fixedly abutted against the bottom end of the mounting seat (602).

7. A lithium hexafluorophosphate purification device according to claim 6, characterized in that: An isolation cover (19) is fixedly mounted on the upper part of the material guide tray (502) for isolating the upper space of the material guide tray (502).

8. A lithium hexafluorophosphate purification device according to claim 1, characterized in that: The isolation plates (12) are each provided with a corresponding clearing device (20), the clearing device (20) comprising a clearing plate (2001) connected to the isolation plate (12) via an elastic member (21), a pushing needle (2002) adapted to the hot nitrogen air permeable hole (13) being fixedly connected to the clearing plate (2001), and corresponding electromagnets (2003) being fixedly mounted on the clearing plate (2001), and the collecting hopper (9) is made of a magnetic metal material.

9. A lithium hexafluorophosphate purification device according to claim 8, characterized in that: The isolation plates (12) are respectively fixedly connected with corresponding pressure sensors. When the pressure value detected by the pressure sensors is greater than a set value p1, the electromagnet (2003) is energized to be adsorbed onto the side wall of the collecting hopper (9), and the push pin (2002) passes through the corresponding hot nitrogen vent holes (13) to perform a clearing operation.

10. A lithium hexafluorophosphate purification device according to claim 9, characterized in that: The bottom of the isolation plate (12) is connected to the discharge pipe (11) via a corresponding one-way valve (22); when the electromagnet (2003) is energized, the one-way valve (22) opens, and the remaining material in the isolation plate (12) is transported to the discharge pipe (11) for discharge.

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