Graphite high-temperature purification device and purification method

Abstract

The application discloses a graphite high-temperature purification device and a purification method, and belongs to the technical field of graphite purification equipment, which comprises a high-temperature purification furnace, wherein the high-temperature purification furnace comprises a furnace body and a furnace cover; a first graphite block, a second graphite block and a graphite pipe are arranged in a cavity formed by the furnace cover and the furnace body; the graphite pipe is narrow at the top and wide at the bottom; a bulk material restraining mechanism is arranged at the center position of the furnace cover; through the application, graphite particles can pass through the furnace body from top to bottom in a single short process, and the whole process of preheating, high-temperature purification and impurity cooling and separation can be completed, the purification time is greatly shortened, the continuous and efficient production mode is achieved, the flow can be restrained, the problems of agglomeration and insufficient heating caused by excessive feeding can be avoided, and the stability of purification and the product purity are improved.

Description

Technical Field

[0001] This invention belongs to the technical field of graphite purification equipment, and more specifically relates to a high-temperature graphite purification device and purification method. Background Technology

[0002] A high-temperature graphite purification furnace is a key piece of equipment specifically designed for purifying graphite. It utilizes the differences in physicochemical properties between graphite and impurities under high-temperature conditions to cause impurities to volatilize in gaseous form or undergo other separation reactions, thereby significantly improving graphite purity. This equipment typically features a furnace structure capable of withstanding high temperatures, a precise temperature control system to ensure and maintain the required high-temperature conditions, and specific gas inlet and outlet devices to assist in the impurity removal process. It is widely used in fields such as lithium batteries, electronics, and aerospace, where extremely high graphite purity is required, providing strong support for the preparation of high-quality graphite materials.

[0003] In the high-temperature purification process of graphite, graphite particles are generally transported to the furnace through pipelines. During this process, the distribution of graphite particles in the pipeline is not stable, and sometimes uneven density occurs. This is mainly because graphite particles have a certain surface activity. When flowing in the pipeline, the particles collide and rub against each other, and the pipeline wall will adsorb them. These factors combined make graphite particles prone to agglomeration, resulting in uneven distribution. When these unevenly distributed and potentially agglomerated graphite particles enter the graphite tube through the furnace inlet for rapid heating, the core principle of purification is to use high temperature to release impurities from the graphite particles. The binding force between impurities and graphite is weakened under high temperature, thereby achieving separation of impurities from graphite. However, if too much graphite enters the graphite tube within a certain period of time, those graphite particles located in the center of the graphite tube and inside the agglomerates will have difficulty effectively absorbing sufficient heat due to the obstruction of the outer particles. As a result, these graphite particles with insufficient heating intensity still retain a lot of impurities, seriously affecting the overall graphite purification effect and ultimately leading to a reduction in product quality. Summary of the Invention

[0004] This invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different approach. Belonging to the technical field of graphite purification equipment, this invention primarily offers a high-temperature graphite purification device and method. This addresses the technical problem mentioned in the background section where a sudden increase in graphite particles may occur within a certain period, leading to insufficient heating of graphite particles far from the inner wall of the graphite tube, thus preventing impurities from being separated in gaseous form.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: A high-temperature graphite purification device includes a high-temperature purification furnace, which comprises a furnace body and a furnace cover. The outer wall of the furnace cover is provided with multiple sealing structures at equal intervals along the circumference. The output end of the sealing structure is inserted into a corresponding through hole on the furnace cover. A first graphite block, a second graphite block, and a graphite tube are disposed in the cavity formed by the furnace cover and the furnace body. The graphite tube is narrower at the top and wider at the bottom. The graphite tube includes a first temperature section, a second temperature section, and a third temperature section from top to bottom. A feed inlet is located at the center of the furnace cover. A material restraint mechanism is installed inside the feed inlet. The material restraint mechanism includes an outer sleeve, a top cover, a diverter block, and a preheating component. The diverter block and the preheating component are detachably connected. A hemispherical dispersion component is installed on the top of the diverter block. The dispersion component is hollow inside. Multiple dispersing protrusions are installed on the outer wall of the dispersion component. The cross-section of the diverter block is a frustum structure and is hollow inside. A gas utilization component is installed inside the diverter block. Multiple first diverter grooves are evenly spaced around the outer wall of the diverter block. An arc-shaped limiting port is installed at the bottom of the diverter block. A restraint ring is movably connected to the arc-shaped limiting port. Multiple second diverter grooves and restraint blocks are installed on the outer wall of the restraint ring. The second diverter grooves and restraint blocks are evenly spaced and staggered. The restraint blocks can rotate to the middle position of the lower end of the first diverter groove.

[0006] Preferably, the outer edge of the lower side of the dispersing component is provided with a plurality of first air outlets, and the orientation angle of the first air outlets is the same as that of the first diversion groove. A connector with openings at both ends is provided at the middle position of the lower side of the dispersing component, and the connector is rotatably connected to the top of the diversion block.

[0007] Preferably, a bearing is provided in the gap between the connector and the top circular hole of the diverter block.

[0008] Preferably, the top cover and the outer sleeve are connected by bolts, and the top cover is located on the outer side of the upper end of the feed inlet, and the inner wall of the outer sleeve is in contact with the protrusion of the first diversion groove on the diversion block.

[0009] Preferably, the preheating component includes a docking block, an inlet pipe, and an internally hollow annular cavity. The outer wall of the annular cavity is provided with multiple third diversion grooves at equal intervals, and the third diversion grooves correspond one-to-one with the first diversion grooves. Each of the third diversion grooves is provided with multiple second air outlets at equal intervals. The orientation angle of the second air outlets is the same as that of the first diversion holes. The outer wall of the annular cavity is connected to the outer sheath by bolts, and the lower edge of the outer sheath is pressed against the upper side of the first graphite block.

[0010] Preferably, the gas utilization component includes a first cavity, the lower end of the first cavity is provided with a connection port, the connection port is threadedly connected to the interface on the docking block, a piston block is movably connected in the first cavity, the piston block is provided with a threaded post and a threaded sleeve threadedly connected to the threaded post, and the threaded sleeve and the constraint ring are detachably connected.

[0011] Preferably, a return spring is provided at the top of the threaded column, and a detachable second cavity is provided at the upper end of the return spring. The upper side of the second cavity is connected to the upper side of the inner wall of the diverter block by bolts. Air inlets are provided at the lower part of the side wall of the second cavity and at the middle position of the side wall of the first cavity. The two air inlets are connected to a waste heat utilization pipe. The upper end of the waste heat utilization pipe passes through the circular holes on the diverter block, the outer sheath, and the furnace cover in sequence.

[0012] Preferably, an impeller is rotatably connected inside the second cavity, and a shaft is provided on the upper side of the center position of the impeller. The shaft and the circular hole at the upper end of the second cavity are connected by a shaft seal.

[0013] Preferably, the outer wall of the shaft portion is provided with a plurality of air inlet openings at equal intervals, the upper end of the shaft portion is provided with a communication port, and the shaft portion and the lower end of the connector are connected and internally communicated.

[0014] A method for high-temperature purification of graphite, the specific steps of which are as follows: S1 Preliminary Equipment: The first graphite block, the second graphite block, and the graphite tube inside the furnace are electrically heated. The temperature of the second temperature section of the graphite tube is higher than that of the first and third temperature sections. At the same time, the sealing structure is driven so that the output end of the sealing structure is pulled out of the corresponding through hole on the furnace cover and inert gas is injected into the through hole to expel other gases inside the furnace. S2 Dispersion Preheating: Excess inert gas is introduced into the first and second chambers through the waste heat utilization pipe. Due to the gas pressure, the impeller in the second chamber can be rotated. The impeller then drives the dispersing component to rotate rapidly through the shaft and the joint. As the graphite particles enter the outer sleeve of the feed inlet through the pipe, they are dispersed by the dispersing protrusions on the dispersing component. The dispersed graphite particles then enter the first diversion groove on the diversion block for separation. At the same time, the hot gas in the second chamber enters the interior of the dispersing component through the air inlet, the connecting port, and the inside of the joint in sequence. Then it is ejected from the first air outlet to preheat the graphite particles on the first diversion groove for the first time and accelerate the flow. Subsequently, the graphite particles enter the third diversion groove through the second diversion groove. The inert gas in the first chamber enters the docking block from the connecting port, and then enters the annular cavity through the inlet pipe. It is ejected from the second air outlet on the annular cavity to give the graphite particles in the third diversion groove a radial outward force and perform a second preheating. S3 Dispersion Constraint: When graphite particles entering the outer sheath agglomerate or have a high local density, the processing capacity per unit time increases, the air pressure introduced by the waste heat utilization pipe increases, and the impeller speed increases. The dispersing component disperses a large number of graphite particles, and at the same time, the air pressure in the first chamber increases sharply. The piston block drives the threaded column to move upward, the return spring at the upper end of the threaded column is compressed, and the threaded sleeve connected to the threaded column drives the constraint ring to rotate, so that the constraint block on the constraint ring finally stops at the middle position of the lower end of the first diversion channel, thus constraining the outflow at the lower end of the first diversion channel. S4 Purification and Separation: Under the force provided by the second vent, the graphite particles will approach the first and second temperature sections of the graphite tube as they fall downwards. The high temperature weakens the binding force between the impurities in the graphite particles and the graphite. The impurities form a gaseous state at the high temperature and separate from the graphite particles. When the gaseous impurities pass through the third temperature section, the low temperature environment can promote the rapid cooling of the gaseous impurities. They are absorbed by the third temperature section of the graphite tube in solid or liquid form, thus purifying the graphite particles.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) By setting up a furnace body, furnace cover, first graphite block, second graphite block, graphite tube, first temperature section, second temperature section and third temperature section, the present invention enables graphite particles to pass through the furnace body from top to bottom in a single short process to complete the whole process of preheating, high temperature purification and impurity cooling and separation, which greatly shortens the purification time, achieves a continuous and efficient production mode, and solves the problems of long process flow and slow reaction in traditional processes; In the feed inlet, hot gas is ejected downwards from the first vent hole inside the dispersion element to complete the first preheating, significantly increasing the initial temperature of the graphite particles and eliminating the lag in the subsequent high-temperature section. At the same time, the airflow pushes the particles downwards to accelerate their flow. Then, gas is ejected through the second vent hole of the annular cavity for the second preheating, further reducing the temperature difference between the particles and the high-temperature zone, and giving the particles a radial outward force, forcing the particles to approach the second temperature section of the graphite tube with the highest temperature, which is conducive to the rapid heating of the graphite particles so that they can reach the temperature for impurity gasification and separation in a very short time. Meanwhile, the graphite tube adopts a structure that is narrow at the top and wide at the bottom. During the cooling process in the third temperature section, the contact area between the graphite particles and the inner wall can be reduced, which greatly reduces the probability of particles sticking to the wall and avoids increasing the difficulty of cleaning the graphite tube later.

[0016] (2) The present invention achieves the dispersion and diversion of graphite particles before they enter the graphite tube by setting a diversion block, a second cavity, an impeller, a bearing, a dispersing protrusion, a connector and a dispersing component with a hemispherical structure. At the same time, the dispersing component uses its own spherical arc structure to provide a downward guiding effect while dispersing the graphite particles. Compared with the traditional spiral blade type dispersing structure, it does not generate an upward force, avoids the defects of traditional spiral blades that interfere with the downward mainstream flow velocity of graphite particles, cause particle back mixing and local blockage, and ensures the stability of the flow velocity of graphite particles. When the instantaneous feed rate is too high or there is local agglomeration, the pressure of the waste heat gas increases simultaneously, driving the impeller and dispersing components to rotate faster, further enhancing the dispersing effect and breaking up agglomerated particles. At the same time, the increased gas pressure drives the piston block and threaded column to move upward, and drives the constraint ring to rotate, so that the constraint block on the constraint ring is located in the middle of the lower end of the first diversion channel, reducing the discharge flow rate of the first diversion channel and accurately controlling the amount of particles entering the graphite tube per unit time. This avoids excessive instantaneous feed leading to an excessively thick particle layer, insufficient heating of the central and internal particles, and failure of heat transfer, further ensuring the quality of graphite particle purification.

[0017] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the overall structure of the present invention; Figure 3 This is a schematic diagram showing the connection between the graphite block and the graphite tube of the present invention; Figure 4 This is a schematic diagram of the furnace cover structure of the present invention; Figure 5 This is a schematic cross-sectional view of the furnace cover of the present invention; Figure 6 This is a schematic diagram of the bulk material restraint mechanism of the present invention; Figure 7 This is a schematic diagram showing the connection between the outer sheath and the top cover of the present invention; Figure 8 This is an exploded view of the bulk material restraint mechanism of the present invention; Figure 9 This is a schematic diagram of the flow divider block structure of the present invention; Figure 10 This is a schematic diagram of the bottom structure of the diversion block of the present invention; Figure 11 This is a schematic diagram of the preheating component structure of the present invention; Figure 12 This is a schematic diagram showing the connection between the dispersion component and the plug of the present invention; Figure 13This is a schematic diagram of the bottom of the dispersion component of the present invention; Figure 14 This is a schematic diagram of the gas utilization component structure of the present invention; Figure 15 This is an exploded view of the gas utilization component of the present invention; Figure 16 This is a schematic diagram of the impeller structure of the present invention; Figure 17 This is a schematic diagram of the first cavity structure of the present invention.

[0019] In the diagram: 1. High-temperature purification furnace; 11. Furnace body; 12. Furnace cover; 121. Feed inlet; 13. First graphite block; 14. Second graphite block; 15. Graphite tube; 151. First temperature section; 152. Second temperature section; 153. Third temperature section; 2. Sealing structure; 3. Material restraint mechanism; 31. Outer sleeve; 32. Top cover; 33. Diverter block; 331. First diverter groove; 332. Arc-shaped limiting port; 333. Bearing; 34. Preheating component; 341. Connecting block; 342. Inlet pipe; 343. Annular cavity; 344 345. Third diversion channel; 35. Second air outlet; 36. Dispersing component; 37. Dispersing protrusion; 38. First air outlet; 39. Connector; 30. Constraint ring; 31. Constraint block; 32. Second diversion channel; 40. Gas utilization assembly; 41. First cavity; 411. Connection port; 42. Piston block; 43. Threaded column; 44. Return spring; 45. Second cavity; 46. Impeller; 461. Shaft; 462. Air inlet; 463. Connecting port; 47. Air inlet; 48. Threaded sleeve; 49. Waste heat utilization pipe. Detailed Implementation

[0020] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the accompanying drawings, which illustrate several embodiments of the present invention. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. Rather, these embodiments are provided to make the disclosure of the present invention more thorough and complete.

[0021] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0023] For the implementation examples, please refer to the appendix. Figure 1-17 As shown, a high-temperature graphite purification device includes a high-temperature purification furnace 1, which includes a furnace body 11 and a furnace cover 12. The outer wall of the furnace cover 12 is provided with a plurality of sealing structures 2 at equal intervals along the circumference. The output end of the sealing structure 2 is inserted into the corresponding through hole on the furnace cover 12. A first graphite block 13, a second graphite block 14 and a graphite tube 15 are arranged in the cavity formed by the furnace cover 12 and the furnace body 11. The graphite tube 15 is narrow at the top and wide at the bottom. The graphite tube 15 includes a first temperature section 151, a second temperature section 152 and a third temperature section 153 from top to bottom. The second temperature section 152 has the highest temperature and the third temperature section 153 has the lowest temperature. A feed inlet 121 is located at the center of the furnace cover 12. A material restraint mechanism 3 is installed inside the feed inlet 121. The material restraint mechanism 3 includes an outer sleeve 31, a top cover 32, a diverter block 33, and a preheating component 34. The diverter block 33 and the preheating component 34 are detachably connected. A hemispherical dispersion component 35 is located on the top of the diverter block 33. The dispersion component 35 is hollow inside. Multiple dispersing protrusions 351 are provided on the outer wall of the dispersion component 35. The diverter block 33 has a frustum-shaped cross-section and is hollow inside. A gas utilization component 4 is installed inside the diverter block 33. The wall is provided with multiple first diversion channels 331 at equal intervals. The bottom of the diversion block 33 is provided with an arc-shaped limiting port 332. A constraint ring 37 is movably connected to the arc-shaped limiting port 332. The outer wall of the constraint ring 37 is provided with multiple second diversion channels 372 and constraint blocks 371. The second diversion channels 372 and constraint blocks 371 are distributed at equal intervals and staggered (initially, the second diversion channels 372 and the first diversion channels 331 correspond one-to-one). The constraint blocks 371 can rotate to the middle position of the lower end of the first diversion channel 331 to constrain and limit the outflow of graphite particles in the first diversion channel 331.

[0024] The specific operation is as follows: First, the first graphite block 13, the second graphite block 14, and the graphite tube 15 inside the furnace body 11 are electrically heated (using direct resistance heating, utilizing the Joule heat generated by the graphite's own resistance). The temperature of the second temperature section 152 of the graphite tube 15 is higher than that of the first temperature section 151 and the third temperature section 153. At the same time, the sealing structure 2 is driven, causing the output end of the sealing structure 2 to be pulled out of the corresponding through hole on the furnace cover 12, and inert gas is injected into the through hole to discharge other gases inside the furnace body 11. The excess inert gas is then introduced into the first cavity 41 and the second cavity 45 through the waste heat utilization pipe 49 (the heat source can be a sealed cavity installed at the bottom of the furnace body 11 to receive the purified graphite particles, and the excess gas in the sealed cavity is transported to the waste heat utilization pipe 49 by a vacuum pump to realize waste heat utilization; the sealed cavity and vacuum pump are existing technologies, so they are shown in the figure). Due to the gas pressure, the impeller 46 in the second cavity 45 can be driven to rotate, and the impeller 46 then... The shaft rod 461 and the connector 36 drive the dispersing component 35 to rotate rapidly. As the graphite particles enter the outer sleeve 31 of the feed inlet 121 through the pipe, they are dispersed by the dispersing protrusions 351 on the dispersing component 35. The dispersed graphite particles then enter the first diversion groove 331 on the diversion block 33 for separation. At the same time, the hot air in the second cavity 45 enters the interior of the dispersing component 35 through the air inlet 462, the connecting port 463, and the interior of the connector 36 in sequence, and then exits from the first air outlet 35. 2. The graphite particles on the first diversion groove 331 are preheated for the first time and the flow is accelerated. Then the graphite particles enter the third diversion groove 344 through the second diversion groove 372. The inert gas in the first cavity 41 enters the docking block 341 from the connection port 411, and then enters the annular cavity 343 through the inlet pipe 342. It is then ejected from the second vent hole 345 on the annular cavity 343, giving the graphite particles in the third diversion groove 344 a radially outward force and performing a second preheating. When graphite particles entering the outer sheath 31 agglomerate or have a high local density, the processing capacity per unit time increases, increasing the air pressure introduced by the waste heat utilization pipe 49. Consequently, the impeller 46 rotates faster, and the dispersing component 35 disperses a large number of graphite particles. At the same time, the air pressure in the first chamber 41 increases sharply. At this time, the connection port 411 is insufficient to release the suddenly increased air pressure, so the piston block 42 will drive the threaded column 43 to move upward. The return spring 44 at the upper end of the threaded column 43 is compressed, and the threaded sleeve 48, which is threadedly connected to the threaded column 43, drives the constraint ring 37 to rotate, so that the constraint block 371 on the constraint ring 37 finally stops at the first diversion groove 331. At the middle position at the lower end, the outflow of the lower end of the first diversion channel 331 is constrained; under the force provided by the second vent 345, the graphite particles will approach the first temperature section 151 and the second temperature section 152 of the graphite tube 15 when they fall downwards. The high temperature weakens the binding force between the impurities in the graphite particles and the graphite, and the impurities form a gaseous state at high temperature and separate from the graphite particles. When the gaseous impurities pass through the third temperature section 153, the low temperature environment can promote the rapid cooling of the gaseous impurities, and they are absorbed by the third temperature section 153 of the graphite tube 15 in solid or liquid form, which can purify the graphite particles and achieve the purpose of continuous purification of the scattered graphite particles.

[0025] Please refer to the appendix carefully. Figure 8-13 As shown, the lower outer edge of the dispersing component 35 is provided with multiple first air outlets 352, and the orientation angle of the first air outlets 352 is the same as that of the first diversion groove 331. A connector 36 with openings at both ends is provided at the middle position of the lower side of the dispersing component 35. The connector 36 is rotatably connected to the top of the diversion block 33. Through the first air outlets 352, the graphite particles in the first diversion groove 331 are preheated and their flow accelerated. A bearing 333 is provided in the gap between the connector 36 and the top circular hole of the diversion block 33 to ensure the stability of the dispersing component 35's rotation. The top cover 32 and the outer sleeve 31 are connected by bolts, and the top cover 32 is located on the outer side of the upper end of the feed inlet 121. The inner wall of the outer sleeve 31 makes a protruding contact fit with the first diversion groove 331 on the diversion block 33. The preheating component 34 includes a docking block 341, an inlet pipe 342, and an internally hollow annular cavity 343. The outer wall of the annular cavity 343 is provided with multiple third diversion grooves 344 at equal intervals, and the third diversion grooves 344 correspond one-to-one with the first diversion grooves 331. Each of the third diversion grooves 344 is provided with multiple second air outlets 345 at equal intervals. The orientation angle of the second air outlets 345 is the same as that of the first diversion holes. The outer wall of the annular cavity 343 is connected to the outer sheath 31 by bolts. The lower edge of the outer sheath 31 presses against the upper side of the first graphite block 13. Through the second air outlets 345, the graphite particles are preheated for a second time, while a force is applied in the direction close to the first temperature section 151 and the second temperature section 152 of the graphite tube 15, so that they are better heated when passing through the graphite tube 15.

[0026] Please refer to the appendix carefully. Figure 14-17 As shown, the gas utilization component 4 includes a first cavity 41. A connection port 411 is provided at the lower end of the first cavity 41. The connection port 411 is threadedly connected to the interface on the docking block 341. A piston block 42 is movably connected inside the first cavity 41. A threaded post 43 is provided on the piston block 42, and a threaded sleeve 48 is threadedly connected to the threaded post 43. The threaded sleeve 48 and the constraint ring 37 are detachably connected. Through the cooperation between the threaded post 43 and the threaded sleeve 48, a driving force is provided for the rotation of the constraint ring 37. A return spring 44 is provided at the top of the threaded post 43, providing a force for the piston block 42 to move downwards and reset. A detachable second cavity 45 is provided at the upper end of the return spring 44, and the upper side of the second cavity 45 is connected to the upper inner wall of the diverter block 33 by bolts. Air inlets 47 are provided at the lower part of the side wall of the second cavity 45 and at the middle position of the side wall of the first cavity 41. Each of the air inlets 47 is connected to a waste heat utilization pipe 49. The upper end of the waste heat utilization pipe 49 passes through the diverter block 33, the outer sheath 31, and the round hole on the furnace cover 12 in sequence. The rotation range of the constraint ring 37 is constrained by the arc-shaped limiting port 332 and will not interfere with the waste heat utilization pipe 49. An impeller 46 is rotatably connected inside the second cavity 45. A shaft part 461 is provided on the upper side of the center position of the impeller 46. The shaft part 461 and the round hole at the upper end of the second cavity 45 are connected by a shaft seal. The impeller 46 receives the air pressure force to drive the dispersion component 35 to rotate. Multiple air inlets 462 are arranged at equal intervals around the outer wall of the shaft part 461. A connecting port 463 is provided at the upper end of the shaft part 461. The shaft part 461 and the lower end of the connector 36 are connected and internally communicated. Through the cooperation between the air inlets 462 and the connecting port 463, the gas is introduced into the dispersion component 35.

[0027] The present invention has been described by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A graphite high-temperature purification device, comprising a high-temperature purification furnace (1), wherein the high-temperature purification furnace (1) comprises a furnace body (11) and a furnace cover (12), wherein a plurality of sealing structures (2) are equidistantly arranged along the circumferential direction on the outer wall of the furnace cover (12), and the output end of the sealing structure (2) is inserted into a corresponding through hole on the furnace cover (12), characterized in that The cavity formed by the furnace cover (12) and the furnace body (11) is provided with a first graphite block (13), a second graphite block (14) and a graphite tube (15). The graphite tube (15) is narrow at the top and wide at the bottom. The graphite tube (15) includes a first temperature section (151), a second temperature section (152) and a third temperature section (153) from top to bottom. A feed inlet (121) is provided at the center of the furnace cover (12). A material restraint mechanism (3) is provided inside the feed inlet (121). The material restraint mechanism (3) includes an outer sleeve (31), a top cover (32), a diverter block (33), and a preheating component (34). A hemispherical dispersion component (35) is provided on the top of the diverter block (33). Multiple dispersing protrusions (351) are provided on the outer wall of the dispersion component (35). The cross-section of the diverter block (33) is a frustum structure. A gas utilization component is provided inside the diverter block (33). (4) The outer wall of the diversion block (33) is provided with a plurality of first diversion grooves (331) at equal intervals. The bottom of the diversion block (33) is provided with an arc-shaped limiting port (332). A constraint ring (37) is movably connected to the arc-shaped limiting port (332). The outer wall of the constraint ring (37) is provided with a plurality of second diversion grooves (372) and constraint blocks (371). The second diversion grooves (372) and constraint blocks (371) are distributed at equal intervals and staggered. The constraint blocks (371) can rotate to the middle position at the lower end of the first diversion grooves (331).

2. The graphite high-temperature purification device according to claim 1, characterized in that, The lower outer edge of the dispersion component (35) is provided with a plurality of first air outlets (352), and the orientation angle of the first air outlets (352) is the same as that of the first diversion groove (331). A connector (36) with openings at both ends is provided at the middle position of the lower side of the dispersion component (35), and the connector (36) is rotatably connected to the top of the diversion block (33).

3. The graphite high-temperature purification device according to claim 2, characterized in that, A bearing (333) is provided in the gap between the connector (36) and the top circular hole of the diverter block (33).

4. The graphite high-temperature purification device according to claim 1, characterized in that, The top cover (32) and the outer sleeve (31) are connected by bolts, and the top cover (32) is located on the outer side of the upper end of the feed inlet (121). The inner wall of the outer sleeve (31) is in contact with the first diversion groove (331) on the diversion block (33).

5. The graphite high-temperature purification device according to claim 1, characterized in that, The preheating component (34) includes a docking block (341), an inlet pipe (342), and an internally hollow annular cavity (343). The outer wall of the annular cavity (343) is provided with multiple third diversion grooves (344) at equal intervals, and the third diversion grooves (344) correspond one-to-one with the first diversion grooves (331). Each of the third diversion grooves (344) is provided with multiple second air outlets (345) at equal intervals. The orientation angle of the second air outlets (345) is the same as that of the first diversion holes. The outer wall of the annular cavity (343) is connected to the outer sheath (31) by bolts. The lower edge of the outer sheath (31) is pressed against the upper side of the first graphite block (13).

6. The graphite high-temperature purification device according to claim 1, characterized in that, The gas utilization component (4) includes a first cavity (41), the lower end of which is provided with a connection port (411), the connection port (411) and the interface on the docking block (341) are threadedly connected, a piston block (42) is movably connected inside the first cavity (41), a threaded post (43) is provided on the piston block (42), and a threaded sleeve (48) is threadedly connected to the threaded post (43), and the threaded sleeve (48) and the constraint ring (37) are detachably connected.

7. The graphite high-temperature purification apparatus according to claim 6, characterized in that, A reset spring (44) is provided at the top of the threaded column (43). A detachable second cavity (45) is provided at the upper end of the reset spring (44). The upper side of the second cavity (45) is connected to the upper side of the inner wall of the diverter block (33) by bolts. An air inlet (47) is provided at the lower part of the side wall of the second cavity (45) and at the middle position of the side wall of the first cavity (41). The two air inlets (47) are connected to a waste heat utilization pipe (49). The upper end of the waste heat utilization pipe (49) passes through the round hole on the diverter block (33), the outer sheath (31) and the furnace cover (12) in sequence.

8. The graphite high-temperature purification apparatus according to claim 7, characterized in that, An impeller (46) is rotatably connected inside the second cavity (45). A shaft part (461) is provided on the upper side of the center position of the impeller (46). The shaft part (461) and the round hole at the upper end of the second cavity (45) are connected by a shaft seal.

9. The graphite high-temperature purification device according to claim 8, characterized in that, The outer wall of the shaft part (461) is provided with a plurality of air inlet openings (462) at equal intervals. The upper end of the shaft part (461) is provided with a communication port (463), and the lower ends of the shaft part (461) and the connector (36) are connected and internally communicated.

10. A method for high-temperature purification of graphite, characterized in that, The specific steps of using the high-temperature graphite purification apparatus according to any one of claims 1-9 are as follows: S1 Preliminary Equipment: The first graphite block (13), the second graphite block (14) and the graphite tube (15) inside the furnace body (11) are electrically heated. The temperature of the second temperature section (152) of the graphite tube (15) is higher than that of the first temperature section (151) and the third temperature section (153). At the same time, the sealing structure (2) is driven, so that the output end of the sealing structure (2) is pulled out of the corresponding through hole on the furnace cover (12) and inert gas is injected into the through hole to discharge other gases inside the furnace body (11). S2 Dispersion Preheating: Excess inert gas is introduced into the first chamber (41) and the second chamber (45) through the waste heat utilization pipe (49). Due to the gas pressure, the impeller (46) in the second chamber (45) can be driven to rotate. Subsequently, the impeller (46) drives the dispersing component (35) to rotate rapidly through the shaft (461) and the connector (36). As the graphite particles enter the outer sleeve (31) of the feed inlet (121) through the pipe, they are dispersed by the dispersing protrusions (351) on the dispersing component (35). Then, the dispersed graphite particles enter the first diversion groove (331) on the diversion block (33) for separation. At the same time, the hot gas in the second chamber (45) will pass through the air inlet (46) in sequence. 2) The graphite particles in the first diversion channel (331) are preheated and accelerated through the connection port (463) and the connector (36). The graphite particles then enter the third diversion channel (344) through the second diversion channel (372). The inert gas in the first cavity (41) enters the docking block (341) through the connection port (411), and then enters the annular cavity (343) through the inlet pipe (342). The graphite particles are then sprayed out through the second outlet port (345) on the annular cavity (343), giving the graphite particles in the third diversion channel (344) a radial outward force and performing a second preheating. S3 Dispersion Constraint: When graphite particles entering the outer sheath (31) agglomerate or have a high local density, the processing capacity per unit time increases, the gas pressure introduced by the waste heat utilization pipe (49) increases, and the impeller (46) speeds up. A large number of graphite particles are dispersed by the dispersing component (35). At the same time, the gas pressure in the first cavity (41) increases sharply, the piston block (42) drives the threaded column (43) to move upward, the return spring (44) at the upper end of the threaded column (43) is compressed, and the threaded sleeve (48) connected to the threaded column (43) drives the constraint ring (37) to rotate, so that the constraint block (371) on the constraint ring (37) finally stops at the middle position of the lower end of the first diversion channel (331), constraining the outflow of the lower end of the first diversion channel (331); S4 Purification and Separation: Under the force provided by the second vent (345), the graphite particles will approach the first temperature section (151) and the second temperature section (152) of the graphite tube (15) when they fall downwards. The high temperature weakens the binding force between the impurities in the graphite particles and the graphite. The impurities form a gaseous state at high temperature and separate from the graphite particles. When the gaseous impurities pass through the third temperature section (153), the low temperature environment can promote the rapid cooling of the gaseous impurities. They are absorbed by the third temperature section (153) of the graphite tube (15) in solid or liquid form, thus purifying the graphite particles.

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