Graphitization furnace with thermal circulation

Abstract

The graphitization furnace comprises a furnace body, a fixed seat, a cooling cylinder, a water inlet pipe, a water outlet pipe and a driving device, the furnace body is arranged on the fixed seat, the cooling cylinder is provided with an annular inner cavity, a through hole penetrating through the two ends is axially formed in the middle of the cooling cylinder, and the annular inner cavity is communicated with the through hole. A through hole is formed in the fixed seat, the cooling cylinder is rotatably arranged on the fixed seat, the furnace body is coaxially arranged in the through hole, the cooling cylinder rotatably sleeves the outer side of the furnace body relative to the furnace body, and the inner side wall of the cooling cylinder is attached to the outer side wall of the furnace body; the water inlet pipe and the water outlet pipe are respectively communicated with the annular inner cavity; and the driving device is arranged on the fixed seat and drives the cooling cylinder to rotate around the central axis of the cooling cylinder. The graphitization furnace with the thermal circulation function is uniform in thermal circulation, temperature fluctuation of the graphitization furnace can be effectively reduced, and graphitization quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lithium battery negative electrode material reaction furnace, especially a graphitization furnace with heat circulation. BACKGROUND

[0002] Under the background of rapid development of industries such as lithium batteries, the demand for graphite as negative electrode material has increased greatly. The traditional graphitization process has problems such as high energy consumption and low efficiency, which makes the negative electrode graphitization continuous graphitization furnace heat circulation device emerge as the times require. It aims to solve the shortcomings of the existing graphitization process, optimize the heat circulation system, improve the heat energy utilization rate, reduce the energy consumption, improve the continuity and stability of the graphitization production, meet the growing demand for high-quality and large-scale production of negative electrode graphite materials, and promote the further development of related industries in the direction of energy saving and high efficiency.

[0003] The existing heat circulation device mainly opens a water circulation pipeline in the graphite furnace. In addition to the inlet and outlet of the cooling water, the graphite furnace body cannot be completely wrapped outside, and part of the surface of the furnace body cannot be effectively cooled. This will cause uneven distribution of cooling water and incomplete heat dissipation, resulting in unstable temperature control of the graphite furnace body. The areas with too high or too low temperature may affect the quality of graphitization, and frequent temperature fluctuations are not conducive to the long-term stable operation of the equipment, which may cause uneven graphite crystallization. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a graphitization furnace with heat circulation, which has uniform heat circulation, reduces temperature fluctuations of the graphitization furnace, and improves the quality of graphitization.

[0005] In order to achieve the above purpose, the graphitization furnace with heat circulation provided by the utility model comprises a furnace body, a fixing seat, a cooling cylinder, a water inlet pipe, a water outlet pipe and a driving device. The furnace body is arranged on the fixing seat. The cooling cylinder has an annular inner cavity, and the middle part of the cooling cylinder is provided with a through hole penetrating through both ends in the axial direction. The cooling cylinder is rotatably arranged on the fixing seat. The furnace body is coaxially arranged in the through hole. The cooling cylinder is rotatably sleeved on the outside of the furnace body relative to the furnace body, and the inner side wall of the cooling cylinder is attached to the outer side wall of the furnace body. The water inlet pipe and the water outlet pipe are respectively communicated with the annular inner cavity. The driving device is arranged on the fixing seat and drives the cooling cylinder to rotate around the central axis thereof.

[0006] Compared with the prior art, the utility model discloses an annular inner chamber is arranged in the cooling cylinder, the cooling cylinder is rotatably sleeved on the furnace body, and the inner side wall of the cooling cylinder is attached to the outer side wall of the furnace body, cooling water is input from the water inlet pipe of the cooling cylinder, and the cooling water is output from the water outlet pipe of the cooling cylinder, so that circulating water flow can be formed in the cooling cylinder, and the furnace body can be cooled.

[0007] Preferably, the number of the cooling cylinder is two, and the two cooling cylinders are arranged at opposite ends of the furnace body.

[0008] Specifically, the driving device is arranged between the two cooling cylinders. In this way, the cooling cylinder can cool the two ends and the middle of the furnace body, ensuring uniform cooling, and the driving device can be arranged at the middle of the outer side of the furnace body, avoiding occupying the radial space of the furnace body and improving the compactness of the structure of the equipment. In addition, since the axial length of the cooling cylinder is large, if the driving device is arranged at one end of the cooling cylinder, the torsion at one end of the cooling cylinder will be too large, and there will be no torsion at the other end, so that the cooling cylinder is easily deformed and the service life of the cooling cylinder is shortened. Therefore, arranging the driving device between the two cooling cylinders can reduce the deformation of the cooling cylinder and prolong the service life.

[0009] Preferably, a sliding member is arranged between the outer side wall of the cooling cylinder and the inner side wall of the fixing seat. By arranging the sliding member, the frictional resistance and wear between the cooling cylinder and the fixing seat can be reduced, so that the cooling cylinder rotates more smoothly, and the heat generated by friction between the two can be reduced, thereby prolonging the service life of the cooling cylinder and the fixing seat.

[0010] Specifically, the sliding member is a sliding plate or a bearing.

[0011] Preferably, one of the outer side wall of the cooling cylinder and the outer side wall of the fixing seat is provided with a sliding rail, and the other of the outer side wall of the cooling cylinder and the outer side wall of the fixing seat is provided with a clamping block, and the clamping block is arranged in the sliding rail in a sliding manner. By using the clamping block and the sliding rail, the axial deviation of the cooling cylinder can be effectively avoided, and the rotation of the cooling cylinder is more stable.

[0012] Preferably, an annular wheel track is arranged in the annular inner cavity, and the annular wheel track is coaxial with the annular inner cavity. By arranging the annular wheel track, the cooling cylinder drives the cooling water to rotate together through the inner wheel track during rotation, so that the cooling water can flow fully in the cooling cylinder, and the problem of cooling water accumulation due to gravity is avoided, so that the outer surface of the furnace body can be uniformly cooled, local overheating is effectively prevented, the uniformity of heat dissipation is improved, and the cooling efficiency is improved.

[0013] Preferably, the water inlet pipe and the water outlet pipe are parallel to the central axis of the cooling cylinder, and the water inlet pipe and the water outlet pipe are arranged on the same end face of the cooling cylinder.

[0014] Preferably, a cooling water circulating device is connected between the water inlet pipe and the water outlet pipe. The cooling water circulating device can accelerate the heat dissipation speed, improve the cooling effect, and recycle the cooling water to save costs.

[0015] Preferably, the fixing seat comprises a left seat body and a right seat body, and the cooling cylinder is arranged on the left seat body and the right seat body correspondingly, and a bearing plate is connected between the left seat body and the right seat body. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the front view of the graphitization furnace with heat circulation of the utility model.

[0017] Figure 2 is the perspective view of the graphitization furnace with heat circulation of the utility model.

[0018] Figure 3 is another perspective view of the graphitization furnace with heat circulation of the utility model.

[0019] Figure 4 is Figure 1 is the enlarged view of part A.

[0020] Figure 5 is Figure 2 is the enlarged view of part B.

[0021] Figure 6 is the internal structure view of the cooling cylinder of the graphitization furnace with heat circulation of the utility model. DETAILED DESCRIPTION

[0022] To illustrate the technical content, structural features and effects of the utility model, the following will be described in detail in combination with the embodiments and the drawings.

[0023] As Figures 1 to 4As shown, the graphite furnace 100 with heat cycle of the utility model includes furnace body 1, fixed seat 2, cooling cylinder 3, water inlet pipe 4, water outlet pipe 5 and drive device 6, the furnace body 1 is arranged on the fixed seat 2, the cooling cylinder 3 has a annular inner chamber 31, and the middle part of the cooling cylinder 3 is axially provided with through hole 32 that penetrates both ends, the cooling cylinder 3 is rotationally arranged on the fixed seat 2. The furnace body 1 is coaxially arranged in the through hole 32, the cooling cylinder 3 is rotationally sleeved on the outside of the furnace body 1 relative to the furnace body 1, and the inner side wall of the cooling cylinder 3 is attached to the outer side wall of the furnace body 1;The water inlet pipe 4 and water outlet pipe 5 are respectively communicated with the annular inner chamber 31;The drive device 6 is arranged on the fixed seat 2 and drives the cooling cylinder 3 to rotate around its central axis. The fixed seat 2 includes left seat body 2a and right seat body 2b, the cooling cylinder 3 is correspondingly arranged on the left seat body 2a and right seat body 2b respectively, and the left seat body 2a is connected with the right seat body 2b on the bearing plate 2c.

[0024] Please refer to Figure 1 And Figure 5The number of the cooling cylinders 3 is two, and they are arranged at opposite ends of the furnace body 1, and the driving device 6 is arranged between the two cooling cylinders 3. In this way, the cooling cylinders 3 can cool the two ends and the middle of the furnace body 1, ensuring uniform cooling, and the driving device 6 can be arranged at the middle of the outer side of the furnace body 1, avoiding occupying the radial space of the furnace body 1 and improving the compactness of the equipment. In addition, due to the large axial length of the cooling cylinder 3, if the driving device 6 is arranged at one end of the cooling cylinder 3, the torsion at one end of the cooling cylinder 3 will be too large, and there will be no torsion at the other end, resulting in unbalanced stress, which is easy to cause the deformation of the cooling cylinder 3 and shorten the service life of the cooling cylinder 3. Therefore, arranging the driving device 6 between the two cooling cylinders 3 can reduce the deformation of the cooling cylinder 3 and prolong the service life. More specifically, the driving device 6 includes a motor 61, a sleeve 62, a driving wheel 63, and an engaging wheel 64. The motor 61 is arranged on the bearing plate 2c of the fixed seat 2 and connected with the driving wheel 63 at the output end. The sleeve 62 is coaxially and rotatably sleeved on the outer side of the furnace body 1. The number of the engaging wheels 64 is two, and each engaging wheel 64 is coaxially fixed at one end of the sleeve 62. One end of each adjacent cooling cylinder 3 is provided with a clamping tooth 33, and the engaging wheels 64 are engaged with the clamping teeth 33 on the same side. The driving wheel 63 drives the sleeve 62 to rotate, so as to drive the cooling cylinder 3 to rotate through the engagement of the engaging wheels 64 and the clamping teeth 33. By arranging the clamping teeth 33 on one end of the cooling cylinder 3 and the engaging wheels 64 on the outer side of the sleeve 62, the engaging wheels 64 are engaged with the clamping teeth 33, so that the sleeve 62 is driven to rotate by the motor 61 and the driving wheel 63, and the purpose of driving the cooling cylinder 3 to rotate is achieved by the engaging wheels 64 and the clamping teeth 33, which is simple in structure and convenient to control. The driving wheel 63 is a gear, and the outer side of the sleeve 62 is provided with a gear tooth. The gear is engaged with the gear tooth. By matching the driving wheel 63 with the gear tooth on the outer side of the sleeve 62, the driving force of the motor 61 can be transmitted to the sleeve 62, so as to drive the sleeve 62 to rotate and achieve the purpose of transmission.

[0025] Please also refer to Figure 3 A sliding piece 7 is arranged between the outer side wall of the cooling cylinder 3 and the inner side wall of the fixed seat 2. The sliding piece 7 is annular, fixedly arranged on the inner side wall of the fixed seat 2 by screws, and sleeved on the outer side wall of the cooling cylinder 3. The sliding piece 7 is a sliding plate or a bearing. In this embodiment, the sliding piece 7 is a sliding plate. By arranging the sliding piece 7, the frictional resistance and wear between the cooling cylinder 3 and the fixed seat 2 can be reduced, so that the cooling cylinder 3 rotates more smoothly, and the heat generated by friction between the two can be reduced, thereby prolonging the service life of the cooling cylinder 3 and the fixed seat 2.

[0026] Please refer to Figure 2 and Figure 6 One of the outer side wall of the cooling cylinder 3 and the outer side wall of the fixed seat 2 is provided with a sliding rail 34, and the other is provided with a clamping block 21 which is slidingly arranged in the sliding rail 34. The outer side wall of the cooling cylinder 3 of the application is provided with a recessed annular sliding rail 34, and the outer side wall of the fixed seat 2 is provided with a convex annular clamping block 21, which cooperate with each other. By using the cooperation of the clamping block 21 and the sliding rail 34, the axial deviation of the cooling cylinder 3 is effectively avoided, so that the rotation of the cooling cylinder 3 is more stable.

[0027] Please refer to Figure 4 The annular inner cavity 31 is provided with an annular wheel track 35 coaxial with the annular inner cavity 31. By setting the annular wheel track 35, the cooling cylinder 3 drives the cooling water to rotate together in the rotating process, so that the cooling water flows fully in the cooling cylinder 3, avoiding the problem of cooling water accumulation due to gravity, so that the outer surface of the furnace body 1 can be uniformly cooled, effectively preventing local overheating, improving the uniformity of heat dissipation, and further improving the cooling efficiency.

[0028] Please refer to Figures 1 to 4 The water inlet pipe 4 and the water outlet pipe 5 are respectively parallel to the central axis of the cooling cylinder 3, and are arranged on the same side of the end face of the cooling cylinder 3. The cooling water circulation device (not shown in the figure) is connected between the water inlet pipe 4 and the water outlet pipe 5. The cooling water circulation device not only accelerates the heat dissipation speed and improves the cooling effect, but also can recycle the cooling water and save cost.

[0029] In summary, the working principle of the graphite furnace 100 with heat circulation of the application will be described in detail as follows:

[0030] First, the graphitization material is loaded into the furnace body 1, the output and input of the cooling water circulating device are connected to the water inlet pipe and the water outlet pipe 5 respectively, then the cooling water is injected into the annular inner cavity 31 of the cooling cylinder 3 from the water inlet pipe 4, after filling, the water inlet pipe 4 and the water outlet pipe 5 are closed and the connection of the cooling water circulating device is disconnected. Then, the motor 61 is started, so that the motor 61 drives the driving wheel 63, the driving wheel 63 drives the sleeve 62 through the wheel, the sleeve 62 drives the engaging wheels 64 at both ends to rotate, the engaging wheels 64 drive the cooling cylinders 3 on both sides to rotate through the engagement with the clamping teeth 33. The cooling cylinder 3 rotates on the fixed seat 2 to drive the wheel rail 35 and the cooling water in the annular inner cavity 31 to move, the wheel rail 35 stirs the cooling water inside the annular inner cavity 31 when rotating, so that the cooling water is heated more uniformly, so that the cooling water can flow fully and absorb the heat transferred from the furnace body 1. Finally, after cooling to a certain extent, when the temperature of the cooling water rises to a certain extent, the motor 61 stops driving, so that the cooling cylinder 3 is stationary relative to the furnace body 1, at this time, the water outlet pipe 5 and the water inlet pipe are connected to the cooling water circulating device respectively, so that the water in the annular inner cavity 31 is discharged, and the cooling water with lower temperature is injected into the annular inner cavity 31 to continue the heat cycle until the reaction of the material in the furnace body 1 is completed.

[0031] Compared with the prior art, since the annular inner cavity 31 is arranged in the cooling cylinder 3, the cooling cylinder 3 is rotatably sleeved outside the furnace body 1, and the inner side wall of the cooling cylinder 3 is attached to the outer side wall of the furnace body 1, the cooling water is injected from the water inlet pipe 4 of the cooling cylinder 3 and the cooling water is output from the water outlet pipe 5 of the cooling cylinder 3, so that the circulating water flow in the cooling cylinder 3 can be formed, and thus the furnace body 1 can be cooled. Moreover, since the four peripheries of the furnace body 1 are covered by the cooling cylinder 3, the driving device 6 is used to drive the cooling cylinder 3 to rotate, so that the four peripheries of the furnace body 1 can be cooled, the heating and cooling of each part of the inner wall of the furnace body 1 are uniform, and thus the heat cycle of the furnace body 1 is very uniform and stable, the temperature fluctuation of the furnace body 1 is greatly reduced, and the graphitization quality is improved.

[0032] The above only discloses preferred examples of the utility model, of course cannot define the right scope of the utility model with this, therefore the equivalent changes made according to the patent range of the utility model still belong to the range covered by the utility model.

Claims

1. A graphitization furnace with heat cycle, characterized by: The application relates to a cooling device, which comprises a furnace body, a fixing base, a cooling cylinder, an inlet pipe, an outlet pipe and a driving device, wherein the furnace body is arranged on the fixing base, the cooling cylinder has an annular cavity, the middle part of the cooling cylinder is provided with a through hole penetrating through both ends in the axial direction, the cooling cylinder is rotatably arranged on the fixing base, the furnace body is coaxially arranged in the through hole, the cooling cylinder is rotatably sleeved outside the furnace body, and the inner side wall of the cooling cylinder is attached to the outer side wall of the furnace body; the inlet pipe and the outlet pipe are respectively communicated with the annular cavity; and the driving device is arranged on the fixing base and drives the cooling cylinder to rotate around the central axis of the cooling cylinder.

2. The graphitization furnace with heat cycle of claim 1, wherein: The number of the cooling cylinders is two, and the two cooling cylinders are respectively arranged at opposite ends of the furnace body.

3. The graphitization furnace with heat cycle of claim 2, wherein: The driving device is arranged between the two cooling cylinders.

4. The graphitization furnace with heat cycle of claim 1, wherein: A sliding piece is arranged between the outer side wall of the cooling cylinder and the inner side wall of the fixing base.

5. The graphitization furnace with heat cycle as claimed in claim 4, characterized in that: The sliding piece is a sliding plate or a bearing.

6. The graphitization furnace with heat cycle of claim 1, wherein: One of the outer side wall of the cooling cylinder and the outer side wall of the fixing base is provided with a sliding rail, and the other is provided with a clamping block which is slidably arranged in the sliding rail.

7. The graphitization furnace with heat cycle of claim 1, wherein: An annular wheel track is arranged in the annular cavity, and the annular wheel track is coaxial with the annular cavity.

8. The graphitization furnace with heat cycle of claim 1, wherein: The central axis of the cooling pipe is parallel to the central axis of the inlet pipe and the outlet pipe, and the inlet pipe and the outlet pipe are arranged on the end face of the same side of the cooling cylinder.

9. The graphitization furnace with heat cycle of claim 1, wherein: A cooling water circulating device is connected between the inlet pipe and the outlet pipe.

10. The graphitization furnace with heat cycle of claim 1, wherein: The fixing base comprises a left base body and a right base body, the cooling cylinders are respectively arranged on the left base body and the right base body, and a bearing plate is connected between the left base body and the right base body.

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