A device for vertical continuous graphitization and purification furnace cleaning

Abstract

A device for cleaning a vertical continuous graphitization and purification furnace comprises a graphite support plate (2) connected to a lower cylinder (1), a crucible (3) connected to the graphite support plate (2), a graphite support cylinder (4) connected to the graphite support plate (2) and the lower cylinder (1), a graphite transmission shaft (5) connected to the graphite support cylinder (4) and the graphite support plate (2), a sweeper (6) connected to the graphite transmission shaft (5), a material collection bin (7) connected to the lower cylinder (1), a drive mechanism (9) connected to the material collection bin (7), and a hollow transmission shaft (10) connected to the graphite transmission shaft (5) and the drive mechanism (9). The technical solution provided by the present invention can timely remove the scale in the furnace, reduce non-productive time such as furnace shutdown and furnace dismantling, improve production efficiency, and reduce energy consumption.

Description

Technical Field

[0001] The invention relates to the technical field of continuous graphitization and purification of carbon materials, in particular to a device for cleaning a vertical continuous graphitization and purification furnace. Background Art

[0002] In traditional methods, the graphitization of negative electrode materials is generally carried out in Acheson graphitization furnaces and inner-series graphitization furnaces, and needs to go through the processes of feeding, graphitization treatment, cooling, and discharging. With the widespread application of lithium-ion batteries in electric vehicles and energy storage fields, the lithium battery industry continues to develop at a high speed, and higher requirements are placed on the graphitization of negative electrode materials. With the advancement of technology, continuous graphitization furnaces have emerged in recent years. For example, CN217330648U discloses a vertical continuous graphitization furnace for carbon materials. A crucible is provided in the vertical continuous graphitization furnace. After the raw materials enter the crucible and the graphitization reaction is completed in the crucible, the generated graphitized material is discharged from the crucible and discharged from the furnace after cooling. The material undergoes a heating, high-temperature reaction, and cooling process in the continuous graphitization furnace.

[0003] The raw materials for graphitization production are calcined at high temperature in an oxygen-free environment to form graphite, and a small amount of sulfide will also be produced. When the material leaves the high-temperature zone and enters the cooling zone, the sulfide will form solid scale that adheres to the inner surface of the graphite crucible. When the scale accumulates to a certain extent, it is very likely to block the feeding channel and reduce the effective volume of the crucible. In severe cases, it will cause the local temperature at the bottom of the crucible to be too high, resulting in accidents such as furnace shutdown, which requires shutdown for treatment. In this case, the general treatment measure is to stop feeding and cool down, wait for the charge to cool down and then dismantle the furnace, and then manually clean the scale in the continuous graphitization and purification furnace, and then open the furnace for production after the treatment. A lot of manpower and electricity are wasted, affecting production. Summary of the invention

[0004] The present invention aims to solve at least one defect existing in the prior art. To this end, the technical problem solved by the present invention is to provide a device for cleaning a vertical continuous graphitization and purification furnace, which can timely remove the sulfide scale adhering to the continuous graphitization and purification furnace, and achieve the purpose of removing the sulfide scale without stopping or dismantling the furnace during the continuous graphitization production.

[0005] In order to solve the above technical problems, the present invention provides a device for cleaning a vertical continuous graphitization and purification furnace, comprising a graphite support plate connected to a lower cylinder, a crucible connected to the graphite support plate, a graphite support cylinder located below the graphite support plate and connected to the graphite support plate and the lower cylinder, a graphite transmission shaft connected to the graphite support cylinder and the graphite support plate, a sweeper located in the crucible and connected to the graphite transmission shaft, a material collection bin connected to the lower end of the lower cylinder, a driving mechanism connected to the material collection bin, and two ends of the crucible are respectively connected to the graphite support plate and the lower cylinder. A hollow transmission shaft that is transmission-connected to the graphite transmission shaft and the driving mechanism; the hollow transmission shaft and the driving mechanism are both provided with a water cooling mechanism; the graphite support plate and the graphite support cylinder are both provided with a plurality of discharge holes; the sweeper comprises a suspension that is transmission-connected to the graphite transmission shaft, and a plurality of strip comb teeth that are connected to the lower bottom surface of the suspension, the axes of the strip comb teeth are arranged obliquely and intersectingly with the axes of the suspension, the strip comb teeth scrape the inner surface of the crucible and the upper surface of the graphite support plate, scrape the material into the discharge holes of the graphite support plate, and remove the scale adhering to the inner surface of the crucible and the graphite support plate.

[0006] As a further improved technical solution, the present invention provides a device for cleaning a vertical continuous graphitization and purification furnace, wherein the driving mechanism includes a gear box connected to the side wall of the collecting bin, an input shaft connected to the gear box, a reduction motor connected to the outer end of the input shaft, a bevel driving gear connected to the inner end of the input shaft, a bevel driven gear connected to the hollow transmission shaft, a cooling water inlet pipe connected to the gear box and having one end extending into the hollow transmission shaft, and a cooling water return pipe connected to the gear box; the hollow transmission shaft is connected to the gear box through a bearing, and a sealing mechanism is provided between the hollow transmission shaft and the gear box housing.

[0007] On the basis of the above-mentioned improvement scheme, as a further improvement technical scheme, the present invention provides a device for cleaning a vertical continuous graphitization and purification furnace, wherein the sealing mechanism includes a bearing seat connected to the gear box, a Y-shaped sealing ring located between the bearing seat and the hollow transmission shaft, and a sealing ring located between the bearing seat and the gear box.

[0008] On the basis of the aforementioned improvement scheme, as a further improvement technical scheme, the device for cleaning a vertical continuous graphitization and purification furnace provided by the present invention also has an input shaft inner bearing seat and an input shaft outer bearing seat connected to the gear box, and the input shaft is respectively connected to the input shaft inner bearing seat and the input shaft outer bearing seat through a tapered bearing; the input shaft inner bearing seat is provided with a plurality of semi-waist-shaped grooves, and the semi-waist-shaped grooves are used for installing a water inlet pipe, or as a return channel for cooling water.

[0009] As a further improved technical solution, the present invention provides a device for cleaning a vertical continuous graphitization and purification furnace, wherein the graphite support plate is turned from isostatically pressed graphite, a stopper connected to the crucible is provided at the upper end, a through hole is provided in the middle for the graphite transmission shaft to pass through, and a discharge hole is provided on the outside of the through hole.

[0010] On the basis of the above-mentioned improvement scheme, as a further improvement technical scheme, the present invention provides a device for cleaning a vertical continuous graphitization and purification furnace, wherein the graphite support cylinder is turned from isostatic graphite, and has a second through hole in the middle for the graphite transmission shaft to pass through, a second discharge hole is provided on the outer side of the second through hole, and a sinker is provided in the middle; the graphite transmission shaft has a shoulder that matches the sinker.

[0011] According to the technical solution provided by the present invention, during the operation, the sweeper rotates continuously, scrapes the inner wall of the crucible and the upper surface of the graphite support plate, thereby preventing the generation of sulfide scaling, and at the same time continuously sending the materials falling into the crucible into the collecting bin. In the process of scraping the inner wall of the crucible and the upper surface of the graphite support plate, the sweeper promptly removes the scaling adhering to the inner surface of the crucible and the upper surface of the graphite support plate, thereby reducing non-productive time such as furnace shutdown and furnace dismantling, improving the continuous graphitization production efficiency, and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 It is a schematic diagram of the main structure of a device for vertical continuous graphitization and purification furnace cleaning in an embodiment;

[0014] Figure 2 for Figure 1 A partial enlarged view of

[0015] Figure 3 is a schematic diagram of the main structure of the sweeper in the embodiment;

[0016] Figure 4 for Figure 3 A-A structural schematic diagram;

[0017] Figure 5 is a schematic diagram of a top view of the structure of a sweeper in an embodiment;

[0018] Figure 6 Schematic diagram of the front view of the graphite support plate in the embodiment;

[0019] Figure 7 Schematic diagram of the top view of the graphite support plate in the embodiment;

[0020] Figure 8 It is a schematic diagram of the main structure of the graphite support cylinder in the embodiment;

[0021] Fig. 9 Schematic diagram of the top view of the graphite support cylinder in the embodiment;

[0022] Fig.10 for Figure 2 A magnified view of part I in FIG.

[0023] Fig.11 is a schematic diagram of the front view of the bearing seat in the input shaft in the embodiment;

[0024] Fig.12 It is a schematic cross-sectional structure diagram of the bearing seat inside the input shaft in the embodiment. Implementation

[0025] The present invention will be further described below in conjunction with the accompanying drawings.

[0026] like Figure 1 The device for cleaning a vertical continuous graphitization and purification furnace shown in the figure comprises a graphite support plate 2 connected to a lower cylinder 1, a crucible 3 connected to the graphite support plate 2, a graphite support cylinder 4 located below the graphite support plate 2 and connected to the graphite support plate 2 and the lower cylinder 1, a graphite transmission shaft 5 connected to the graphite support cylinder 4 and the graphite support plate 2, a sweeper 6 located in the crucible 3 and transmission-connected to the graphite transmission shaft 5, a material collection bin 7 connected to the lower end of the lower cylinder 1, a driving mechanism 9 connected to the material collection bin 7, and a hollow transmission shaft 10 with two ends respectively transmission-connected to the graphite transmission shaft 5 and the driving mechanism 9. The hollow transmission shaft 10 is provided with a cooling water pipe, and the outlet water of the cooling water pipe flows through the inner cavity of the driving mechanism 9. Under the cooling effect of the cooling water, the cooling of the hollow transmission shaft 10 and the driving mechanism 9 is ensured, thereby ensuring the reliability of the transmission connection. See FIG. Figures 6 to 9 The graphite support plate 2 and the graphite support cylinder 4 are each provided with two discharge holes. The discharge holes on the graphite support plate 2 and the graphite support cylinder 4 are the same in number and aligned vertically. The crucible 3 is a bottomless crucible. The sweeper 6 scrapes the material in the crucible 3 to the discharge hole of the graphite support plate 2, and then drops into the collection bin 7 through the discharge hole of the graphite support plate 2 and the discharge hole on the graphite support cylinder 4. The material of the sweeper 6 is isostatic graphite, see Figures 3 to 5The sweeper 6 has a suspension 11 drivingly connected to the graphite transmission shaft 5, a plurality of strip comb teeth 12 connected to the bottom surface of the suspension 11, the axis of the strip comb teeth 12 is arranged obliquely and intersectingly with the axis of the suspension 11, the suspension 11 is connected to the graphite transmission shaft 5 by a key, the suspension 11 and the strip comb teeth 12 rotate together with the graphite transmission shaft 5, the strip comb teeth 12 scrape the inner wall of the crucible 3 and the upper surface of the graphite support plate, scrape the material into the discharge hole of the graphite support plate 2, and remove the scale adhering to the inner wall of the crucible 3 and the upper surface of the graphite support plate. The upper end of the device for cleaning the vertical continuous graphitization and purification furnace is connected to the lower part of the vertical continuous graphitization and purification furnace by a flange, and the lower end of the collecting bin 7 is connected to the discharge device by a flange. The upper and lower flange connections are provided with sealing rings to isolate from the external air, maintain the inert environment in the vertical continuous graphitization and purification furnace, and enable the device to be used safely in a high temperature environment.

[0027] In the production process of vertical continuous graphitization and purification furnace, after the raw materials are calcined at high temperature in an oxygen-free environment, due to the residual sulfides, when the materials leave the high-temperature zone and enter the cooling zone, the sulfides will form solid scale that adheres to the inner wall of the graphite crucible and the upper surface of the graphite support plate. When the scale accumulates to a certain extent, it is very likely to block the material discharge channel and reduce the effective volume of the crucible. In severe cases, it will cause the local temperature at the bottom of the crucible to be too high, resulting in accidents such as furnace shutdown, which requires shutdown for treatment. The high temperature zone of the vertical continuous graphitization and purification furnace enters the cooling section, in which a bottomless crucible 3 is arranged. Usually, sulfide scaling occurs on the inner wall of the crucible 3 and the upper surface of the graphite support plate. A sweeper 6 is arranged in the crucible 3. The sweeper 6 rotates under the drive of the graphite transmission shaft 5, the hollow transmission shaft 10 and the driving mechanism 9, and timely scrapes the material and scaling in the crucible 3 into the discharge hole of the graphite support plate 2, and enters the collection bin 7 through the discharge hole of the graphite support cylinder 4. After the material is cooled to a certain degree in the crucible 3, no scaling will be generated in the discharge hole of the graphite support cylinder 4 and the collection bin 7.

[0028] During the operation, the sweeper rotates continuously, scrapes the inner wall of the crucible 3 and the upper surface of the graphite support plate, hinders the formation of sulfide scaling, and continuously sends the materials falling into the crucible 3 into the collecting bin 7. When the sweeper scrapes the inner wall of the crucible 3 and the upper surface of the graphite support plate, the scaling adhering to the inner wall of the crucible 3 and the upper surface of the graphite support plate is removed in time, reducing non-productive time such as furnace shutdown and furnace dismantling, improving continuous graphitization production efficiency, and reducing energy consumption. Practice has proved that after the vertical continuous graphitization and purification furnace is equipped with a furnace cleaning device, the continuous production time is greatly improved, the production capacity is increased by 2 to 3 times, and the electricity and labor costs are reduced by one third.

[0029] Based on the above basic solution, as one of the embodiments, Figure 1 and Figure 2As shown, the driving mechanism 9 of the device for vertical continuous graphitization and purification furnace cleaning provided by the present invention includes a gear box 13 connected to the side wall of the collecting bin 7, an input shaft 14 connected to the gear box 13, a reduction motor 15 connected to the outer end of the input shaft 14, a bevel driving gear 16 connected to the inner end of the input shaft 14, a bevel driven gear 17 connected to the hollow transmission shaft 10, a cooling water inlet pipe 18 connected to the gear box 13 and having one end extending into the hollow transmission shaft 10, and a cooling water return pipe 19 connected to the gear box 13. The hollow transmission shaft 10 is connected to the gear box 13 through a bearing. A sealing mechanism 20 is provided between the hollow transmission shaft 10 and the gear box 13 housing. An input shaft inner bearing seat 24 and an input shaft outer bearing seat 25 are provided in the gear box 13. The bearing seat 21 and the lower bearing seat of the hollow transmission shaft 10 are installed. The input shaft 14 is respectively connected to the input shaft inner bearing seat 24 and the input shaft outer bearing seat 25 through a tapered bearing; the hollow transmission shaft 10 is also respectively connected to the bearing seat 21 and the lower bearing seat through a tapered bearing. The tapered raceways of the two tapered bearings connected to the input shaft 14 are symmetrically arranged, and the tapered raceways of the two tapered bearings connected to the hollow transmission shaft 10 are also symmetrically arranged. The two tapered bearings can withstand the axial load generated during the movement of the tapered driving gear 16 and the tapered driven gear 17, and withstand the axial gravity load of the hollow transmission shaft 10. The symmetrical arrangement of the tapered raceways balances the axial force and fixes the positions of the input shaft 14 and the hollow transmission shaft 10. Fig.11 and Fig.12 As shown, the input shaft inner bearing seat 24 is provided with a plurality of semi-waist-shaped grooves 26, and the semi-waist-shaped grooves 26 are used to install the cooling water inlet pipe 18, or as a return channel for cooling water. Fig.10 As shown, the sealing mechanism 20 includes a bearing seat 21 connected to the gear box 13, a Y-shaped sealing ring 22 located between the bearing seat 21 and the hollow transmission shaft 10, and a sealing ring 23 located between the bearing seat 21 and the gear box 13. The input shaft 14 intersects the axis of the hollow transmission shaft 10 at 90°, and the reduction motor 15 is installed on the side of the collecting bin 7 to avoid interference with the feed port directly below when installed vertically. The hollow transmission shaft 10 and the graphite transmission shaft 5 are connected by shaft end splines. The hollow transmission shaft 10 and the graphite transmission shaft 5 can slide axially, which can eliminate the stress generated by the hollow transmission shaft 10 and the graphite transmission shaft 5 in cold and hot states. The cooling water entering from the cooling water inlet pipe 18 cools the hollow transmission shaft 10 and the gear box 13, and is discharged from the cooling water return pipe 19 after heat exchange.

[0030] Based on the above basic solution, as one of the embodiments, Figure 6 and Figure 7As shown, the graphite support plate 2 for the vertical continuous graphitization and purification furnace cleaning device provided by the present invention is made of isostatic graphite, with a stopper 28 connected to the crucible 3 at the upper end, a through hole 30 for the graphite transmission shaft 5 to pass through in the middle, and a discharge hole 31 outside the through hole 30. The stopper 28 facilitates the installation and alignment of the crucible.

[0031] Based on the above basic solution, as one of the embodiments, Figure 8 and Fig. 9 As shown, the graphite support cylinder 4 of the vertical continuous graphitization and purification furnace cleaning device provided by the present invention is made of isostatic graphite, and has a second through hole 32 in the middle for the graphite transmission shaft 5 to pass through, a second discharge hole 33 outside the second through hole 32, and a sink 27 in the middle; see Figure 1 The graphite transmission shaft 5 has a shoulder 8 that matches the sinker 27. The graphite support cylinder 4 is processed into a cylindrical sinker 27 in the middle, which matches the shoulder 8 of the graphite transmission shaft 5 to support the graphite transmission shaft 5. Since graphite has good lubricating properties, it also plays a lubricating role.

[0032] The present invention is not limited to the above preferred embodiments, and can also be transformed and improved in various forms within the spirit defined in the claims and the specification of the present invention, which can solve the same technical problems and achieve the expected technical effects, so it will not be repeated. All solutions that can be directly or associatively derived from the contents disclosed by ordinary technicians in the field, as long as they are within the spirit defined in the claims, also belong to the protection scope of the present invention.

Claims

1. A device for vertical continuous graphitization and purification furnace cleaning, characterized in that: The invention comprises a graphite support plate (2) connected to a lower cylinder (1), a crucible (3) connected to the graphite support plate (2), a graphite support cylinder (4) located below the graphite support plate (2) and connected to the graphite support plate (2) and the lower cylinder (1), a graphite transmission shaft (5) connected to the graphite support cylinder (4) and the graphite support plate (2), a sweeper (6) located in the crucible (3) and connected to the graphite transmission shaft (5), a material collection bin (7) connected to the lower end of the lower cylinder (1), a driving mechanism (9) connected to the material collection bin (7), and a hollow transmission shaft (1) having two ends respectively connected to the graphite transmission shaft (5) and the driving mechanism (9). 10); the hollow transmission shaft (10) and the driving mechanism (9) are both provided with a water cooling mechanism; the graphite support plate (2) and the graphite support cylinder (4) are both provided with a plurality of discharge holes; the sweeper (6) comprises a suspension (11) drivingly connected to the graphite transmission shaft (5), and a plurality of strip comb teeth (12) connected to the lower bottom surface of the suspension (11); the axis of the strip comb teeth (12) is arranged obliquely and intersectingly with the axis of the suspension (11); the strip comb teeth (12) scrape the inner surface of the crucible (3) and the upper surface of the graphite support plate (2), scrape the material into the discharge hole of the graphite support plate (2), and remove the scale adhering to the inner surface of the crucible (3) and the graphite support plate (2).

2. The device for vertical continuous graphitization and purification furnace cleaning according to claim 1, characterized in that: The driving mechanism (9) comprises a gear box (13) connected to the side wall of the collecting bin (7), an input shaft (14) connected to the gear box (13), a reduction motor (15) drivingly connected to the outer end of the input shaft (14), a bevel driving gear (16) connected to the inner end of the input shaft (14), a bevel driven gear (17) connected to the hollow transmission shaft (10), a cooling water inlet pipe (18) connected to the gear box (13) and having one end extending into the hollow transmission shaft (10), and a cooling water return pipe (19) connected to the gear box (13); the hollow transmission shaft (10) is connected to the gear box (13) via a bearing, and a sealing mechanism (20) is provided between the hollow transmission shaft (10) and the housing of the gear box (13).

3. The device for cleaning a vertical continuous graphitization and purification furnace according to claim 2, characterized in that: The sealing mechanism (20) comprises a bearing seat (21) connected to the gear box (13), a Y-shaped sealing ring (22) located between the bearing seat (21) and the hollow transmission shaft (10), and a sealing ring (23) located between the bearing seat (21) and the gear box (13).

4. The device for vertical continuous graphitization and purification furnace cleaning according to claim 2, characterized in that: It also comprises an input shaft inner bearing seat (24) and an input shaft outer bearing seat (25) connected to the gear box (13); the input shaft (14) is respectively connected to the input shaft inner bearing seat (24) and the input shaft outer bearing seat (25) via tapered bearings; the input shaft inner bearing seat (24) is provided with a plurality of semi-waist-shaped grooves (26); the semi-waist-shaped grooves (26) are used for installing water inlet pipes, or as return channels for cooling water.

5. The device for vertical continuous graphitization and purification furnace cleaning according to claim 1, characterized in that: The graphite support plate (2) is machined from isostatically pressed graphite, has a stopper (28) at the upper end connected to the crucible (3), has a through hole (30) in the middle for the graphite transmission shaft (5) to pass through, and has a discharge hole (31) on the outside of the through hole (30).

6. The device for cleaning a vertical continuous graphitization and purification furnace according to claim 5, characterized in that: The graphite support cylinder (4) is machined from isostatically pressed graphite and has a second through hole (32) in the middle for the graphite transmission shaft (5) to pass through, a second discharge hole (33) is provided on the outside of the second through hole (32), and a sinker (27) in the middle; the graphite transmission shaft (5) has a shaft shoulder (8) that matches the sinker (27).

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