Granulation equipment, complete set of crushing and granulation equipment and carbon nanotube processing technology

Abstract

This application relates to a granulation equipment, a complete set of crushing and granulation apparatus, and a carbon nanotube processing technology, belonging to the field of granulation technology. The complete set of crushing and granulation apparatus includes a crusher and a granulation device connected to each other. The granulation device includes a conveying cylinder and a stirring shaft. The crusher and the granulation device are connected by a pipeline. The granulation device includes a frame and a control mechanism. The conveying cylinder is hinged to the frame. The control mechanism is used to control the raising of the discharge end of the conveying cylinder, thereby improving the granulation effect. This application enables continuous production of carbon nanotube powder. The crushed raw material is not easily exposed to the air directly, and the raw material dust generated during the crushing process is not easily released into the air environment, reducing environmental pollution. The material movement resistance within the granulation equipment is relatively high, and the granulated product has a high bulk density.

Description

Technical Field

[0001] This application relates to the technical field of granulation processes, and in particular to a granulation device, a complete set of crushing and granulation equipment, and a carbon nanotube processing technology. Background Technology

[0002] Carbon nanotubes have excellent electrical conductivity and low addition requirements, making them widely used in batteries, electronic packaging, chips, electromagnetic shielding materials, rubber tires, and other fields. However, their application is also limited by drawbacks such as easy agglomeration, difficulty in dispersion, and low bulk density. Currently, carbon nanotubes can be effectively agglomerated through pulverization processes. Pulverized carbon nanotubes have even lower bulk density, so they cannot be used directly and often need to be granulated before use.

[0003] The stirring tooth granulator is a commonly used wet granulation equipment. It includes a conveying cylinder, a stirring shaft, and stirring rods. Several stirring rods are installed on the circumference of the stirring shaft and arranged in a spiral shape. The stirring shaft rotates inside the conveying cylinder, and the stirring rods both stir and convey the material. However, the spacing between the rods near the inner wall of the conveying cylinder is relatively large, resulting in insufficient stirring effect on the material and reducing the quality of the granulation process. Summary of the Invention

[0004] To address the aforementioned issues, this application provides a granulation device, a complete set of crushing and granulation equipment, and a carbon nanotube processing technology.

[0005] The granulation equipment provided in this application adopts the following technical solution: A pelletizing device includes a conveying cylinder and a stirring shaft. The conveying cylinder has a feed inlet, and the stirring shaft is connected inside the conveying cylinder and the two rotate coaxially relative to each other. The stirring shaft is provided with a plurality of stirring rods, which are spirally arranged on the circumference of the stirring shaft with the axis of the conveying cylinder as the center. The stirring shaft includes one or more positive spiral sections and one or more negative spiral sections. The spiral direction of the stirring rods on the positive spiral sections is opposite to that on the negative spiral sections. The total length of the positive spiral sections is greater than the total length of the negative spiral sections, and the section closest to the feed inlet is the positive spiral section.

[0006] By adopting the above technical solution, during the process of material moving in the conveying cylinder, the presence of the anti-spiral section increases the resistance encountered by the material when it moves normally in the conveying cylinder, reduces the overall speed, and prolongs the contact time between the material and the stirring rod in the conveying cylinder, resulting in a higher granulation effect.

[0007] Preferably, the plurality of positive spiral segments and the plurality of negative spiral segments are arranged alternately along the axial direction of the stirring gear shaft.

[0008] By adopting the above technical solution, the material encounters resistance at multiple points during its journey from entering the conveyor cylinder to leaving the conveyor cylinder, which helps to improve the extent and uniformity of the obstruction effect of the anti-spiral section that applies resistance to the material.

[0009] Preferably, the helix angle of the spiral arrangement of the stirring teeth on the anti-spiral segment is 0°-60°, and the circumferential arrangement range of the stirring teeth on a single anti-spiral segment is 0.25-1 revolutions.

[0010] By adopting the above technical solution, when the helix angle of the spiral arrangement of the stirring teeth on the anti-spiral section is within this range, the resistance it applies to the material has a high effective rate. Furthermore, the circumferential arrangement of the stirring teeth on a single anti-spiral section is relatively small, making it less likely for the material to stagnate due to continuous obstruction. Preferably, the gap between the stirring rod on the reverse spiral section and the inner wall of the conveying cylinder is 2-20cm, and the gap between the stirring rod on the positive spiral section and the inner wall of the conveying cylinder is 0.5-5cm.

[0011] By adopting the above technical solution, the stirring rod of the positive spiral section responsible for material transmission is able to contact the material more effectively than the stirring rod of the negative spiral section that applies resistance, thereby improving the smoothness of the material's movement within the granulation equipment.

[0012] Preferably, it also includes a frame and a control mechanism, wherein the conveying cylinder is hinged to the frame, the rotation plane of the conveying cylinder is a vertical plane and parallel to the axis of the conveying cylinder, and the control mechanism is used to control the rotation of the conveying cylinder.

[0013] Preferably, the control mechanism includes a hydraulic device and a connecting rod. The hinge point between the conveying cylinder and the frame is located at the end near the feed inlet. The hydraulic device is fixedly connected to the frame and located at the end of the conveying cylinder away from the feed inlet. The piston rod of the hydraulic device moves in a vertical direction. One end of the connecting rod is hinged to the piston rod of the hydraulic device, and the other end is hinged to the end of the conveying cylinder away from the feed inlet.

[0014] By adopting the above technical solution, the conveying cylinder can rotate at a certain angle in the vertical direction, and the discharge end of the conveying cylinder is raised. The resistance of the material moving towards the discharge port is further increased, which further increases the residence time of the material in the conveying cylinder and the friction contact time with the stirring tooth rod, thereby increasing the bulk density of the granulated product.

[0015] Preferably, the angle between the axis of the conveying cylinder and the horizontal plane is in the range of 0 to 30°.

[0016] By adopting the above technical solution, the angle range of the lifting of the end of the conveyor cylinder will not be too large, thus affecting the normal feeding at the inlet.

[0017] Preferably, the ratio of the length to the diameter of the conveying cylinder is 5 to 30:1.

[0018] The complete set of crushing and granulation equipment provided in this application adopts the following technical solution: A complete set of crushing and granulation equipment includes the above-mentioned granulation equipment and a crusher, wherein the crusher is connected to the feed inlet of the conveying cylinder. By adopting the above technical solution, the raw materials processed by the crusher can be directly transported to the granulation equipment for granulation processing in a closed space. That is, the crushed raw materials are not easily exposed to the air, and the raw material dust generated during the crushing process is not easily allowed to enter the air environment, thus reducing environmental pollution and improving the operational safety of the production process.

[0019] The carbon nanotube pulverization and granulation production process provided in this application adopts the following technical solution: It includes the following steps in sequence: S1 Crushing: The collected carbon nanotube powder is fed into a crusher for processing, wherein the D50 of the carbon nanotube powder obtained after crushing is 5um to 300um. S2 Granulation: The carbon nanotube powder generated in S1 is granulated using the granulation equipment described in this application; S3 extrusion: Extrusion treatment of carbon nanotube particles generated in S2; S4 Drying: The carbon nanotube particles generated in S3 are dried to obtain carbon nanotube particles with a bulk density of 0.05 to 0.3 g / cm3.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up the positive spiral section, the negative spiral section, and the control mechanism, the discharge end of the conveying cylinder can be raised at a certain angle during the granulation process. The stirring rod of the negative spiral section generates resistance to the material in the direction of travel. When the stirring rod rotates, the transmission efficiency of the material in the conveying cylinder becomes lower, thereby prolonging the residence time of the material in the conveying cylinder. The interaction time between the material and the stirring rod is also prolonged, and the granulation process is carried out more fully, thereby increasing the bulk density of the granulated product. 2. With the direct connection between the crusher and the granulation equipment, the raw materials processed by the crusher can be directly transported to the granulation equipment for granulation within a closed space. This means that the crushed raw materials are not easily exposed to the air, and the raw material dust generated during the crushing process is not easily allowed to enter the air environment, reducing environmental pollution, improving operational safety during the production process, and also reducing material transportation costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram illustrating the structure of the granulation equipment in the embodiments of this application.

[0022] Figure 2 This is a cross-sectional view of the granulation equipment used in the embodiments of this application.

[0023] Figure 3 This is a schematic diagram illustrating the connection structure of two adjacent positive rotating cylinders in an embodiment of this application.

[0024] Figure 4 This is a schematic diagram illustrating the structure of the anti-rotation cylinder in the embodiments of this application.

[0025] Figure 5 yes Figure 2 A magnified view of part A in the middle.

[0026] Figure 6 This is a structural schematic diagram illustrating the control mechanism in the embodiments of this application.

[0027] Figure 7 This is a schematic diagram illustrating the overall structure of the crushing and granulation equipment in the embodiments of this application.

[0028] Figure 8 This is a schematic flowchart illustrating the carbon nanotube pulverization and granulation production process in the embodiments of this application.

[0029] Explanation of reference numerals in the attached drawings: 1. Carbon nanotube reactor; 11. Storage tank; 111. Powder conveying pump; 12. Crusher; 13. Transfer tank; 131. Powder metering pump; 14. Extruder; 2. Granulation equipment; 21. Frame; 211. Drive motor; 22. Conveying cylinder; 221. Feed inlet; 222. Discharge outlet; 223. Steel rod; 224. Water spray device; 23. Stirring gear shaft; 231. Segmented shaft; 2311. Positive spiral section; 2312. Negative spiral section; 2313. Central shaft hole; 232. Stirring gear. 233. Gear rack; 233. Forward rotation cylinder; 2331. Mounting rod; 2332. Mounting hole; 2333. Mounting nut; 2334. Accommodation space; 234. Reverse rotation cylinder; 2341. Synchronization hole; 2342. Protective groove cylinder; 2343. Adjusting bolt; 2344. Adjusting roller; 24. Central shaft; 241. Adjusting part; 242. Adjusting ring groove; 243. Adjusting wedge; 244. Thrust spring; 3. Control mechanism; 31. Hydraulic device; 311. Guide sleeve; 312. Guide groove; 32. Connecting rod. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0031] In a first aspect, embodiments of this application disclose a granulation apparatus, such as... Figure 1 and 2As shown, this embodiment employs a wet granulation process. The granulation equipment 2 is a stirring tooth granulator, which includes a frame 21, a conveying cylinder 22, and a stirring tooth shaft 23. One end of the conveying cylinder 22 is connected to the frame 21. A feed inlet 221 is provided on the side wall of the conveying cylinder 22 near its connection with the frame 21, and the opening direction of the feed inlet 221 is upward. A discharge outlet 222 is also provided on the conveying cylinder 22, located on the side wall of the end of the conveying cylinder 22 away from the feed inlet 221, and its opening direction is downward. The length-to-diameter ratio of the conveying cylinder 22 ranges from 5 to 30:1.

[0032] like Figure 1 , 2 As shown in Figure 3, a water spraying device 224 is provided on the conveying cylinder 22 near the feed inlet 221. The water spraying device 224 extends into the conveying cylinder 22 with an atomizing nozzle, which is used to add water to the material. In this embodiment, the mass ratio of the sprayed water to the added carbon nanotubes is 2:1. The stirring shaft 23 includes a central shaft 24 and multiple segmented shafts 231. Several stirring rods 232 are welded and fixed on the circumference of the segmented shafts 231. The stirring rods 232 are arranged in a spiral around the stirring shaft 23. The segmented shafts 231 are arranged sequentially along the axial direction. Each pair of adjacent segmented shafts 231 can be detachably connected. The segmented shaft 231 closest to the feed inlet 221 is coaxially rotatably connected to the end plate of the conveying cylinder 22. A drive motor 211 for driving the segmented shafts 231 to rotate is also fixedly installed at the end of the conveying cylinder 22. The segmented shaft 231 has a coaxial central shaft hole 2313 for the central shaft rod 24 to pass through. The central shaft rod 24 coaxially passes through the conveying cylinder 22 and each segmented shaft 231. The two end plates of the conveying cylinder 22 support each segmented shaft 231 through the central shaft rod 24, thereby improving the stability of each segmented shaft 231 when rotating.

[0033] like Figure 2 , 3As shown in Figure 4, the stirring shaft 23 includes one or more positive spiral sections 2311 and one or more negative spiral sections 2312. The stirring rods 232 on the positive spiral section 2311 are arranged in the opposite direction to the stirring rods 232 on the negative spiral section 2312. When the stirring shaft 23 rotates, the stirring rods 232 on the positive spiral section 2311 generate an axial thrust on the material in the direction of approaching the discharge port 222, and the stirring rods 232 on the negative spiral section 2312 generate an axial component force on the material in the direction of approaching the feed port 221. The segmented shaft 231 includes two types: a forward spiral cylinder 233 and a reverse spiral cylinder 234. Each individual forward spiral segment 2311 corresponds to one forward spiral cylinder 233, and each individual reverse spiral segment 2312 corresponds to one reverse spiral cylinder 234. In this embodiment, the number of stirring rods 232 that complete one revolution around the segmented shaft 231 is thirteen. The stirring rods 232 on each forward spiral cylinder 233 are arranged to complete three revolutions, while the stirring rods 232 on each reverse spiral cylinder 234 are arranged to complete only one revolution. The forward spiral cylinders 233 and reverse spiral cylinders 234 are arranged alternately. The helix angle of the stirring rods 232 on the forward spiral cylinder 233 is 45°, while the helix angle of the stirring rods 232 on the reverse spiral cylinder 234 is 0°-60°, preferably 30° in this embodiment. The gap between the stirring rod 232 on the anti-spiral section 2312 and the inner wall of the conveying cylinder 22 is 2-20 cm, preferably 10 cm in this embodiment. The gap between adjacent stirring rods 232 on the anti-spiral section 2312 is 1-10 cm. The gap between the stirring rod 232 on the positive spiral section 2311 and the inner wall of the conveying cylinder 22 is 0.5-5 cm, preferably 2 cm in this embodiment. During the rotation of the stirring shaft 23, the presence of the anti-spiral section 2312 increases the material travel resistance in the conveying cylinder 22, increases the residence time of the material in the conveying cylinder 22, and increases the frictional contact time with the stirring rod 232, thereby increasing the bulk density of the granulated product.

[0034] like Figure 3 , 4As shown in Figure 5, between two adjacent rotary cylinders 233, three mounting rods 2331 are fixedly connected to the end face of the rotary cylinder 233 near the feed inlet 221. The end face of the rotary cylinder 233 near the discharge outlet 222 has corresponding mounting holes 2332 for inserting the mounting rods 2331. A mounting nut 2333 is rotatably connected to the end face of the rotary cylinder 233 at the mounting hole 2332. The mounting rods 2331 are threadedly connected to the mounting nuts 2333. Each mounting rod 2331 is inserted into the corresponding mounting nut 2333, and by simultaneously rotating each mounting nut 2333, the end of the mounting rod 2331 is inserted into the mounting hole 2332, thus connecting the two adjacent rotary cylinders 233. Between two adjacent positive rotating cylinders 233, a space 2334 is formed to accommodate the negative rotating cylinder 234. The negative rotating cylinder 234 has a synchronization hole 2341 corresponding to each mounting rod 2331. The mounting rod 2331 passes through the synchronization hole 2341, which facilitates the circumferential fixation of the positive rotating cylinders 233 and the negative rotating cylinders 234. The total length of all the segmented shafts 231 after assembly is 400cm, and the diameter (including the stirring rod 232) is 40cm, that is, the effective length-to-diameter ratio of the stirring shaft 23 is 10:1.

[0035] like Figure 1 , 2 As shown in Figure 6, steel rods 223 are fixedly connected to both end plates of the conveying cylinder 22. The conveying cylinder 22 is connected to the frame 21 by a hinge, with the hinge shaft located at the end of the steel rod 223 near the feed inlet 221. The rotation plane of the conveying cylinder 22 is a vertical plane. The granulation equipment 2 also includes a control mechanism 3, which is used to rotate the conveying cylinder 22 relative to the frame 21 by a certain angle. Any mechanical structure that can raise the discharge end of the conveying cylinder 22 by a certain angle is acceptable. In this embodiment, the control mechanism 3 includes a hydraulic device 31 and a connecting rod 32. The hydraulic device 31 is located at one end of the conveying cylinder 22 near the discharge outlet 222 and is fixedly connected to the frame 21. The piston rod of the hydraulic device 31 extends and retracts in a vertical direction, and its end is hinged to one end of the connecting rod 32. The other end of the connecting rod 32 is hinged to the steel rod 223 near the discharge outlet 222. When the piston rod of the hydraulic device 31 is in the retracted state, the axis of the conveying cylinder 22 is horizontal. When the piston rod extends, the discharge end of the conveying cylinder 22 is raised, and the resistance of the material to the discharge port 222 is further increased, which further increases the residence time of the material in the conveying cylinder 22 and the friction contact time with the stirring rod 232, thereby increasing the bulk density of the granulated product. In this embodiment, the maximum angle between the axis of the conveying cylinder 22 and the horizontal direction is 30°. The small tilt angle range will not be too large to affect the normal feeding at the feed port 221.

[0036] like Figure 2 and 6As shown, a guide sleeve 311 is fixedly connected to the hydraulic device 31. The guide sleeve 311 is coaxially sleeved on the piston rod. A guide groove 312 is provided on the outer wall of the guide sleeve 311 along its own axis on the side facing the conveying cylinder 22. The cross-section of the guide groove 312 is T-shaped. An adjustment part 241 is fixedly connected to one end of the central shaft 24 facing the guide sleeve 311. The adjustment part 241 is inserted into the guide groove 312 and is slidably connected to the guide sleeve 311 through the guide groove 312. When the hydraulic device 31 controls the piston rod to rise, the end of the conveying cylinder 22 is lifted. As the end of the conveying cylinder 22 rises, the horizontal distance between it and the guide sleeve 311 gradually increases. Therefore, the central shaft 24 will be pulled out a certain distance.

[0037] like Figure 3 , 4 As shown in Figure 5, an adjusting ring groove 242 is coaxially formed on the central shaft 24 at the location of the receiving space 2334. The width of the adjusting ring groove 242 and the width of the receiving space 2334 are both greater than the axial length of the counter-rotating cylinder 234. Multiple adjusting wedges 243 are fixedly connected to the groove wall on the side of the adjusting ring groove 242 away from the hydraulic device 31. Each adjusting wedge 243 is arranged in a circular array with the axis of the central shaft 24 as the center, and the wedge surface of the adjusting wedge 243 faces the opposite direction of rotation of the segmented shaft 231.

[0038] like Figure 3 , 4As shown in Figure 5, a thrust spring 244 is fixedly connected to the end face of the forward rotating cylinder 233 facing the receiving space 2334. The number of thrust springs 244 is the same as the number of mounting rods 2331. Each thrust spring 244 is coaxially sleeved on the outside of the mounting rod 2331, and the other end of the thrust spring 244 abuts against the end face of the reverse rotating cylinder 234 facing the hydraulic device 31. An adjusting bolt 2343 is inserted into the reverse rotating cylinder 234 along its own radial direction. An adjusting roller 2344 is coaxially rotatably connected to the end of the adjusting bolt 2343. The adjusting roller 2344 is located on the hole wall of the central shaft hole 2313 of the reverse rotating cylinder 234. In this embodiment, the number of adjusting rollers 2344 and adjusting wedges 243 in each receiving space 2334 is four. When the axis of the conveying cylinder 22 is horizontal, the adjusting roller 2344 does not contact the adjusting wedge 243 during the rotation of the segmented shaft 231. After the end of the conveying cylinder 22 is raised, the central shaft 24 and the adjusting wedge 243 move relative to the direction of material travel. The wedge surface of the adjusting wedge 243 periodically abuts against the wheel surface of the adjusting roller 2344, causing the counter-rotating cylinder 234 to be forced and move closer to the discharge port 222. At the moment when the adjusting roller 2344 disengages from the wedge surface of the adjusting wedge 243, the thrust spring 244 can push the counter-rotating cylinder 234 to move rapidly in the opposite direction, impacting the material head-on, thereby improving the stirring effect of the stirring tooth rod 232 of the counter-spiral section 2312 on the material. Both ends of the counter-rotating cylinder 234 are welded and fixed with a protective groove cylinder 2342. A portion of the stirring rod 232 is also fixed on the protective groove cylinder 2342. The two protective groove cylinders 2342 are respectively inserted by the ends of two adjacent positive rotating cylinders 233, and the inner wall of the protective groove cylinder 2342 is always in contact with the outer wall of the positive rotating cylinder 233, thereby reducing the probability of material entering the receiving space 2334.

[0039] Secondly, embodiments of this application disclose a complete set of crushing and granulation equipment, such as... Figure 7As shown, the equipment includes, in sequence along the material conveying direction, a carbon nanotube reactor 1, a powder conveying pump 111, a pulverizer 12, the aforementioned granulation equipment 2, and an extruder 14. Each pair of adjacent equipment is connected via a closed pipeline. Carbon nanotube raw materials are added to the carbon nanotube reactor 1 with a certain amount of water or solvent and stirred to form an impregnated powder, which is then pumped by the powder conveying pump 111 into a storage tank 11. The material discharged from the storage tank 11 is then fed into the pulverizer 12 for further pulverization. In this embodiment, the pulverizer 12 is an air-jet pulverizer. A transfer tank 13 and a powder metering pump 131 are also sequentially installed on the pipeline between the pulverizer 12 and the granulation equipment 2. The powder discharged from the pulverizer 12 can be stored in the transfer tank 13, and the powder metering pump 131 can inject the powder from the transfer tank 13 into the granulation equipment 2 through the inlet 221 for granulation processing. After granulation, the material is discharged from the granulation equipment 2 and enters the extruder 14 for extrusion. In this embodiment, the extruder 14 is a twin-screw extruder. The carbon nanotube particles discharged from the extruder 14 can then undergo subsequent drying.

[0040] The implementation principle of the granulation equipment and crushing and granulation complete set of devices in this application is as follows: The stirring shaft 23 is selectively configured according to production requirements and raw material characteristics, including the number, arrangement, and size of the forward-rotating cylinder 233 and the reverse-rotating cylinder 234, as well as the angle at which the end of the conveying cylinder 22 needs to be raised. The carbon nanotubes are first subjected to airflow pulverization, and then the material is conveyed to the granulation equipment 2 for granulation. The granulation effect is improved by extending the residence time of the material in the conveying cylinder 22, thereby obtaining carbon nanotube powder with a high bulk density.

[0041] Thirdly, this application also provides a carbon nanotube pulverization and granulation production process using the above-mentioned apparatus, such as... Figure 8 As shown, it includes the following steps in sequence: S1: The carbon nanotubes are stirred in the reactor to obtain carbon nanotube raw material with a bulk density of 0.1 g / cm3. The stirred carbon nanotube raw material is then fed into a pulverizer for processing. S2: The pulverizer pulverizes the carbon nanotube powder generated in S1. The speed of the air jet pulverizer is set to 100Hz and the air pressure to 0.7MPa. After pulverization, the particle size of the carbon nanotubes changes from 400um to 30um. The bulk density of the carbon nanotube powder after pulverization is about 0.02g / cm3. S3: The powder generated in S2 is conveyed to the stirring tooth granulator for wet granulation to form spherical agglomerates of carbon nanotube material. In this embodiment, the length-to-diameter ratio of the conveying cylinder of the granulation equipment is 10 / 1. S4: The carbon nanotube material generated in S3 is further fed into the extruder for extrusion to form relatively regular carbon nanotube particles; S5: The material generated in S4 is dried to obtain carbon nanotube particles with a bulk density of 0.05 to 0.3 g / cm3.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A granulation device, comprising a conveying cylinder (22) and a stirring shaft (23), wherein the conveying cylinder (22) has a feed inlet (221), the stirring shaft (23) is connected inside the conveying cylinder (22) and the two rotate coaxially relative to each other, and the stirring shaft (23) is provided with a plurality of stirring rods (232), the plurality of stirring rods (232) being spirally arranged on the circumferential surface of the stirring shaft (23) with the axis of the conveying cylinder (22) as the center, characterized in that: The stirring shaft (23) includes one or more positive spiral sections (2311) and one or more negative spiral sections (2312). The stirring rods (232) on the positive spiral section (2311) are arranged in opposite directions to the stirring rods (232) on the negative spiral section (2312). The total length of the positive spiral section (2311) is greater than the total length of the negative spiral section (2312). The section closest to the feed inlet (221) is the positive spiral section (2311). Multiple positive spiral segments (2311) and multiple negative spiral segments (2312) are arranged alternately along the axial direction of the stirring gear shaft (23); It also includes a frame (21) and a control mechanism (3). The conveying cylinder (22) is hinged to the frame (21). The rotation plane of the conveying cylinder (22) is a vertical plane and parallel to the axis of the conveying cylinder (22). The control mechanism (3) is used to control the rotation of the conveying cylinder (22). The control mechanism (3) includes a hydraulic device (31) and a connecting rod (32). The hydraulic device (31) is fixedly connected to the frame (21) and located at the end of the conveying cylinder (22) away from the feed inlet (221). The piston rod of the hydraulic device (31) moves in a vertical direction. One end of the connecting rod (32) is hinged to the piston rod of the hydraulic device (31), and the other end is hinged to the end of the conveying cylinder (22) away from the feed inlet (221). The rotation angle range of the conveying cylinder (22) is 0 to 30°.

2. The granulation equipment according to claim 1, characterized in that: the spiral helix angle of the helical arrangement of the stirring tooth shaft (23) on the anti-spiral section (2312) is 0°-60°, and the circumferential arrangement range of the stirring tooth rod (232) on a single anti-spiral section (2312) along the stirring tooth shaft (23) is 0.25-1 circumference.

3. The granulation equipment according to claim 1, characterized in that: the gap between the stirring rod (232) on the reverse spiral section (2312) and the inner wall of the conveying cylinder (22) is 2-20cm, and the gap between the stirring rod (232) on the positive spiral section (2311) and the inner wall of the conveying cylinder (22) is 0.5-5cm.

4. A granulation apparatus according to any one of claims 1-3, characterized in that: The ratio of the length to the diameter of the conveying cylinder (22) is 5 to 30:

1.

5. A complete set of crushing and granulation equipment, characterized in that: The granulation equipment according to claim 1 also includes a crusher (12), which is connected to the feed inlet (221) of the conveying cylinder (22).

6. A carbon nanotube pulverization and granulation production process, characterized in that: The steps are as follows: S1 Crushing: The collected carbon nanotube powder is fed into a crusher for processing, wherein the D50 of the carbon nanotube powder obtained after crushing is 5um to 300um. S2 Granulation: The carbon nanotube powder generated in S1 is granulated using the granulation equipment described in claim 4; S3 extrusion: Extrusion treatment of carbon nanotube particles generated in S2; S4 Drying: The carbon nanotube particles generated in S3 are dried to obtain a bulk density of 0.05–0.3 g / cm³. 3 Carbon nanotube particles.

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