CN113929932B

CN113929932B - Preparation method and preparation equipment applied to carbon nano tube master batch

Info

Publication number: CN113929932B
Application number: CN202111003256.4A
Authority: CN
Inventors: 毛鸥; 张美杰
Original assignee: Zhenjiang Xinna Material Technology Co ltd
Current assignee: Zhenjiang Xinna Material Technology Co ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2023-09-05
Anticipated expiration: 2041-08-30
Also published as: CN113929932A

Abstract

The invention relates to a preparation method and a preparation device thereof applied to carbon nanotube master batch, pulping, uniformly dispersing carbon nanotube powder with granularity of 10-150 mu m in a solvent, and carrying out ultrasonic stirring for 20min to form slurry; adding a dispersing aid, a lubricant and a plasticizer into the slurry, and mechanically stirring for 0.5-1.5 h; grinding the final mixed master batch in a slurry grinder for 2-3 h, and filtering by a 50-mesh screen; and finally, putting the filtered slurry into a spray drying granulation tower, spraying the material into fog through the spray drying granulation tower, and rapidly evaporating and drying to obtain the carbon nano tube master batch. The agglomeration phenomenon of the slurry is avoided, so that fine particles in the slurry reach uniform size, and the conductivity of the carbon nano tube master batch is ensured.

Description

Preparation method and preparation equipment applied to carbon nano tube master batch

Technical Field

The invention belongs to the technical field, and particularly relates to a preparation method and preparation equipment applied to carbon nano tube master batches.

Background

The carbon nano tube has excellent performances such as high strength, high thermal conductivity, high electrical conductivity and the like, has wide potential application prospect in the field of interdisciplinary science such as material science, chemistry, physics and the like, and is a new material which is spotlighted in the 21 st century. Because the high-molecular material has high resistivity, static electricity is not easy to remove, so that accumulated voltage is very large, and the production and use processes of plastic products are greatly negatively influenced, the addition of antistatic master batches into the high-molecular material is a common solution for solving the problem. At present, two general methods for preparing conductive master batches of carbon nanotube polymer composite conductive materials are available, namely, the conductive master batches are prepared by melt blending a polymer material and carbon nanotubes through a double screw extruder or an internal mixer, and the conductive master batches are prepared by dissolving the polymer material in a solvent, adding the carbon nanotubes for mechanical stirring or ultrasonic dispersion, and removing the solvent.

The existing conductive master batch is poor in conductivity, low in preparation efficiency and difficult to produce in large scale. At present, when the carbon nano tube master batch is produced and granulated, a screw extruder is generally adopted to extrude the master batch into strips and then cut the master batch into granules, the product of the extrusion and granulation is not round enough in particle shape, the length and the end face shape of the granules cannot be precisely controlled, the rate of the belt is high, the product quality is difficult to ensure, the productivity is lower, and the master batch cannot be suitable for large-scale production line production.

Disclosure of Invention

The invention aims at the problems and discloses a preparation method and preparation equipment applied to carbon nano tube master batch, which are realized.

The specific technical scheme is as follows:

the preparation method for the carbon nano tube master batch is characterized by comprising the following steps of:

step one: pulping, namely uniformly dispersing carbon nano tube powder with the granularity of 10-150 mu m in a solvent, and stirring for 20min by ultrasonic to form slurry;

step two: adding a dispersing auxiliary, a lubricant and a plasticizer into the slurry, and mechanically stirring for 0.5-1.5 h at the temperature of 30-90 ℃ at the rotating speed of 150-350 rpm;

step three: and (3) thinning: putting the final mixed master batch in the second step into a slurry grinder for grinding for 2-3 hours, and filtering through a 50-mesh screen;

step four: and (3) spray granulating, namely putting the slurry filtered in the step (III) into a spray drying granulating tower, spraying the material into fog through the spray drying granulating tower, and rapidly evaporating and drying to obtain the carbon nano tube master batch.

The carbon nano tube powder, the solvent, the dispersing auxiliary, the lubricant and the plasticizer are prepared from the following components in parts by mass: 10-15: 25-35, 5-10: 1-10: 10-15 parts;

in the first step, the solvent comprises one or more of water, ethanol, glycol, isopropanol, acetone, chloroform, N-methylpyrrolidone, tetrahydrofuran, dimethylformamide and toluene;

and in the fourth step, the raw materials are heated to 100-130 ℃, and spray granulation is carried out in a drying chamber with the spray pressure of 0.1-0.5 Mpa and the temperature of 120-220 ℃ of hot air.

The utility model provides a be applied to preparation facilities of carbon nanotube master batch, includes prilling tower, heating device, return device, prilling tower one side sets up heating device, heating device includes heater, air-blower, heating pipe, the air outlet of air-blower is connected the heater, the air outlet of heater is connected the heating pipe, heating pipe one end enters into prilling tower inner chamber top center and is equipped with first jet orifice, heating pipe one side is equipped with the bleeder, bleeder one end horizontal run through the prilling tower in and be equipped with the second jet orifice, and be relative setting from top to bottom between first jet orifice and the second jet orifice; the top end of the granulating tower is provided with a feed pipe, one end of the feed pipe longitudinally penetrates through the first jet pipe orifice and a nozzle is arranged in the first jet pipe orifice;

the bottom of the granulating tower is provided with a discharge hole, a coarse screen component, a fine screen component and a driving component for driving the coarse screen component and the fine screen component are arranged in the inner cavity of the granulating tower, the coarse screen component comprises a coarse screen plate and an agitating impeller, the coarse screen plate is horizontally arranged in the granulating tower, a plurality of coarse screen holes are formed in the coarse screen plate, and the agitating impeller is rotatably arranged in the center of the coarse screen plate; the fine screen assembly is positioned below the coarse screen assembly and comprises a screening hopper, a vibrating motor and a scraping frame, the side wall of the upper end of the screening hopper is connected with the inner wall of the granulating tower through a plurality of elastic supports, the bottom of the screening hopper is arranged in an inclined plane and is provided with the vibrating motor, one end of the bottom of the screening hopper is obliquely provided with a conveying pipe, the conveying pipe penetrates through the granulating tower and is connected with a feed back device, the feed back device is used for conveying particles with smaller size into the granulating tower again, the middle part of the screening hopper is horizontally provided with a fine screen plate, a plurality of fine screen holes are formed in the fine screen plate, the screening hopper is circumferentially provided with a plurality of discharge holes at the edge of the side wall of the fine screen plate, the scraping frame is arranged on the fine screen plate and comprises a fixed seat and a plurality of scraping rods uniformly distributed on the side wall of the fixed seat, one end of each scraping rod is arranged in an arc structure, and each scraping rod extends to the inner wall of the screening hopper, and the bottom of each scraping rod is provided with a soft rubber scraping blade; the driving assembly is located between the coarse screen assembly and the fine screen assembly and comprises a gear box, a transmission shaft and a driving motor, the gear box is arranged at the center of an inner cavity of the granulating tower, the side wall of the upper end of the gear box is fixedly connected with the inner wall of the granulating tower through a plurality of support rods, the transmission shaft is horizontally penetrated and arranged on the gear box, two ends of the transmission shaft are rotationally connected with the inner wall of the granulating tower, one end of the transmission shaft is connected with the output end of the driving motor, the driving motor is arranged on the outer wall of the granulating tower and drives the transmission shaft to rotate, and the transmission shaft drives the stirring impeller and the scraping frame to rotate through gear matching.

Further, feed back device includes feed back pipe, three-way solenoid valve, inhales and arranges feed cylinder, rotating electrical machines, lifting unit, the feed back pipe vertically sets up on one side of the prilling tower, and sets up on the feed back pipe three-way solenoid valve one end with the conveying pipeline is connected, and the feed back pipe top is crooked to set up and enter into the prilling tower inner chamber in, and the feed back pipe bottom is connected inhale and arrange feed cylinder top, inhale and arrange feed cylinder inner chamber upper end and be equipped with flexible gasbag, flexible gasbag top center is the opening setting, and flexible gasbag bottom is equipped with the lifting seat, the rotating electrical machines sets up on inhaling and arranging feed cylinder lateral wall, and the rotating electrical machines drives the lifting seat through lifting unit and goes up and down and compress flexible gasbag to blow in the prilling tower again with the granule of piling up at the feed back pipe lower extreme.

Further, the stirring impeller comprises a rotating shaft and a plurality of stirring blades uniformly distributed on the rotating shaft, and the stirring blades are all in arc-shaped bending arrangement.

Furthermore, the edges of the periphery of the fine screen plate are arranged in an upward inclined mode, and the tail ends of the scraping rods are also bent upwards and are matched with the fine screen plate.

Further, be equipped with first bevel gear on the transmission shaft, first bevel gear's upper and lower both ends meshing respectively are connected with second bevel gear and third bevel gear, second bevel gear and third bevel gear set up respectively on upper junction axle and lower junction axle, upper junction axle and lower junction axle rotate respectively and set up the upper and lower both ends at the gear box, and upper junction axle and lower junction axle are connected with pivot and fixing base respectively.

Further, the lower connecting shaft is connected with the fixing base through a damping coupling.

Further, a filter screen is arranged in the inner cavity at the lower end of the feed back pipe.

Further, lifting unit includes rolling disc, trace and articulated seat, the rolling disc is vertical setting, and the center of rolling disc and rotating electrical machines's output shaft fixed connection are equipped with protruding seat in the both ends symmetry of rolling disc, are equipped with the fixed axle on one of them protruding seat perpendicularly, rotate on the fixing base the one end of trace, the trace other end with articulated seat articulates, and articulated seat is fixed to be set up in lifting seat bottom.

Further, the lower end of the inner cavity of the suction and discharge charging barrel is further provided with a controller and a travel switch, the controller is respectively electrically connected with the travel switch and the three-way electromagnetic valve, and contacts of the travel switch are respectively contacted with the convex seats at two ends of the rotating disc, so that the contacts of the travel switch are sequentially pressed by the two convex seats when the rotating disc rotates.

The beneficial effects of the invention are as follows:

(1) According to the invention, after the slurry is ground by the grinder, the agglomeration phenomenon of the slurry is avoided, so that fine particles in the slurry reach uniform size, the subsequent spray granulation is convenient, the conductivity of the carbon nano tube master batch is ensured, and the roundness of the carbon nano tube master batch is ensured by a spray granulation mode.

(2) According to the invention, the slurry sprayed from the nozzles is heated and dried by adopting the upper and lower air jet nozzles in the granulating tower, so that the slurry can be quickly evaporated and dried to form spherical particles, defective products are reduced, meanwhile, the production efficiency is improved, the particles are more uniform after passing through a coarse sieve and a fine sieve in sequence, and the particles with smaller size can be filtered, so that the production quality of the carbon nano tube master batch is ensured.

According to the invention, the material returning device sucks small particles and slurry dust discharged from the sieving hopper through the telescopic air bags in the suction and discharge cylinder and re-sprays the small particles and slurry dust into the granulating tower through the material returning pipe, so that the small particles and the slurry dust can be re-mixed with the slurry to form new particles, the production cost is effectively reduced, and the production quality is further improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the prilling tower according to the present invention.

Fig. 2 is an enlarged schematic view at a in fig. 1.

Fig. 3 is a top view of a coarse screen deck according to the present invention.

Fig. 4 is a top view of a fine screen deck according to the invention.

Fig. 5 is a schematic structural view of a suction and discharge cylinder in the present invention.

Fig. 6 is a schematic structural view of a rotating disc according to the present invention.

The granulation tower 1, the discharge port 11, the heater 2, the blower 21, the heating pipe 22, the branch pipe 221, the first air injection pipe 222, the second air injection pipe 223, the feed pipe 3, the nozzle 31, the coarse screen assembly 4, the coarse screen plate 41, the coarse screen hole 411, the stirring impeller 42, the rotating shaft 421, the stirring blade 422, the fine screen assembly 5, the sieving bucket 51, the fine screen plate 512, the fine screen mesh 5121, the discharge port 513, the vibration motor 52, the scraping frame 53, the fixing seat 531, the scraping rod 532, the soft rubber scraping blade 5321, the elastic support 54, the driving assembly 6, the gear box 61, the support rod 611, the transmission shaft 62, the first bevel gear 621, the driving motor 63, the upper connection shaft 64, the second bevel gear 641, the lower connection shaft 65, the third bevel gear 651, the vibration absorbing coupling 652, the feed back device 7, the feed back pipe 71, the filter screen, the three-way electromagnetic valve 72, the suction and discharge cylinder 73, the telescopic air bag 731, the elevating seat 732, the rotating motor 74, the rotating disc 75, the elevating seat 751, the fixing shaft 751, the linking rod 76, the hinging seat 77, the controller 78, and the travel switch 79.

Detailed Description

In order to make the technical scheme of the invention clearer and more definite, the invention is further described below with reference to the accompanying drawings, and any scheme obtained by carrying out equivalent substitution and conventional reasoning on the technical characteristics of the technical scheme of the invention falls into the protection scope of the invention. The fixed connection mentioned in the invention is a common connection mode in the mechanical field, and the fixed connection can be realized by welding, bolt-nut connection and screw connection.

In the description of the invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the invention.

The utility model provides a be applied to preparation facilities of carbon nanotube master batch, includes prilling tower 1, heating device, feed back device 7, prilling tower 1 one side sets up heating device, heating device includes heater 2, air-blower 21, heating pipe 22, the air outlet of air-blower is connected heater 2, the air outlet of heater 2 is connected heating pipe 22, heating pipe 22 one end enters into prilling tower 1 inner chamber top center and is equipped with first jet orifice 222, heating pipe 22 one side is equipped with branch pipe 221, branch pipe 221 one end level runs through prilling tower 1 and is equipped with the second jet orifice, and is the relative setting from top to bottom between first jet orifice 222 and the second jet orifice 223; a feed pipe 3 is arranged at the top end of the granulation tower 1, one end of the feed pipe 3 longitudinally penetrates through the first air injection pipe orifice 222, and a nozzle 31 is arranged in the first air injection pipe orifice 222;

the bottom of the granulating tower 1 is provided with a discharge hole 11, a coarse screen component 4, a fine screen component 5 and a driving component 6 for driving the coarse screen component 4 and the fine screen component 5 are arranged in the inner cavity of the granulating tower 1, the coarse screen component 4 comprises a coarse screen plate 41 and an agitating impeller 42, the coarse screen plate 41 is horizontally arranged in the granulating tower 1, a plurality of coarse screen holes 411 are formed in the coarse screen plate 41, and the agitating impeller 42 is rotatably arranged in the center of the coarse screen plate; the fine screen assembly 5 is located below the coarse screen assembly 4, the fine screen assembly 5 comprises a screening hopper 51, a vibrating motor 52 and a scraping frame 53, the side wall of the upper end of the screening hopper 51 is connected with the inner wall of the granulating tower 1 through a plurality of elastic supports 54, the bottom of the screening hopper 51 is arranged in an inclined plane and is provided with the vibrating motor 52, one end of the bottom of the screening hopper 51 is obliquely provided with a conveying pipe, the conveying pipe penetrates through the granulating tower 1 and is connected with a feed back device 7, the feed back device 7 is used for conveying particles with smaller size into the granulating tower 1 again, the middle part of the screening hopper 51 is horizontally provided with a fine screen plate 512, a plurality of fine screen holes 5121 are formed in the fine screen plate 512, a plurality of discharge holes 513 are circumferentially formed in the side wall edge of the screening hopper 51, the scraping frame 53 is arranged on the fine screen plate 512, the scraping frame 53 comprises a fixed seat 531 and a plurality of scraping rods 532 uniformly distributed on the side wall of the fixed seat 531, one end of the scraping rods 532 extends to the inner wall of the screening hopper 1, and each scraping rod 5321 is provided with a soft rubber 5321; the drive assembly 6 is located between the coarse screen assembly 4 and the fine screen assembly 5, the drive assembly 6 comprises a gear box 61, a transmission shaft 62 and a drive motor 63, the gear box 61 is arranged at the center of an inner cavity of the granulating tower 1, the side wall of the upper end of the gear box 61 is fixedly connected with the inner wall of the granulating tower 1 through a plurality of support rods 611, the transmission shaft 62 is horizontally arranged in a penetrating mode, two ends of the transmission shaft 62 are rotatably connected with the inner wall of the granulating tower 1, one end of the transmission shaft 62 is connected with the output end of the drive motor 63, the drive motor 63 is arranged on the outer wall of the granulating tower 1 and drives the transmission shaft 62 to rotate, the transmission shaft 62 drives the stirring impeller 42 and the scraping frame 53 to rotate through gear matching, so that the stirring impeller 42 stirs particles on the coarse screen plate 41 and leaks the particles from the coarse screen holes 411 to the fine screen plate 512 in the sieving hopper 51, and the particles with larger size are discharged from the discharge opening 513 through the scraping plate.

Further, the feed back device 7 includes feed back pipe 71, three-way solenoid valve 72, inhale and arrange feed cylinder 73, rotating electrical machines 74, lifting unit, feed back pipe 71 vertically sets up in prilling tower 1 one side, and set up on the feed back pipe 71 three-way solenoid valve 72, three-way solenoid valve 72 one end with the conveying pipeline is connected, and feed back pipe 71 top is crookedly set up and enters into prilling tower 1 inner chamber, and feed back pipe 71 bottom is connected inhale and arrange feed cylinder 73 top, inhale and arrange feed cylinder 73 inner chamber upper end and be equipped with flexible gasbag 731, flexible gasbag 731 top center is the opening setting, flexible gasbag 731 bottom is equipped with lifting seat 732, rotating electrical machines 74 set up on inhale and arrange feed cylinder 73 lateral wall, and rotating electrical machines 74 drive lifting seat 732 through lifting unit and compress flexible gasbag 731 to blow in prilling tower 1 again the granule of piling up in feed back pipe 71 lower extreme.

Further, the stirring impeller 42 includes a rotating shaft 421 and a plurality of stirring blades 422 uniformly distributed on the rotating shaft 421, and the stirring blades 422 are all curved.

Further, the peripheral edges of the fine screen plate 512 are disposed obliquely upward, and the ends of the scraping rods 532 are also disposed bent upward and adapted to the fine screen plate 512.

Further, the transmission shaft 62 is provided with a first bevel gear 621, the upper and lower ends of the first bevel gear 621 are respectively engaged with a second bevel gear 641 and a third bevel gear 651, the second bevel gear 641 and the third bevel gear 651 are respectively disposed on the upper connecting shaft 64 and the lower connecting shaft 65, the upper connecting shaft 64 and the lower connecting shaft 65 are respectively rotatably disposed at the upper and lower ends of the gear box 61, and the upper connecting shaft 64 and the lower connecting shaft 65 are respectively connected with the rotation shaft 421 and the fixing seat 531.

Further, the lower connecting shaft 65 is connected with the fixing base 531 through a damping coupling 652.

Further, a filter screen 711 is disposed in the inner cavity at the lower end of the feed back pipe 71.

Further, the lifting assembly comprises a rotating disc 75, a linkage rod 76 and a hinging seat 77, the rotating disc 75 is longitudinally arranged, the center of the rotating disc 75 is fixedly connected with an output shaft of the rotating motor 74, protruding seats 751 are symmetrically arranged at two ends of the rotating disc, a fixing shaft 751 is vertically arranged on one protruding seat 751, one end of the linkage rod 76 rotates on the fixing seat 531, the other end of the linkage rod 76 is hinged with the hinging seat 77, and the hinging seat 77 is fixedly arranged at the bottom of the lifting seat 732.

Further, the lower end of the inner cavity of the suction and discharge cylinder 73 is further provided with a controller 78 and a travel switch 79, the controller 78 is electrically connected with the travel switch 79 and the three-way electromagnetic valve 72 respectively, contacts of the travel switch 79 are respectively contacted with the raised seats 751 at two ends of the rotating disc, when the rotating disc rotates, the contacts of the travel switch 79 are sequentially pressed by the two raised seats 751, so that the opening of the three-way electromagnetic valve 72 is opened, when the suction is performed, the three-way electromagnetic valve 72 is positioned at one end opening of the feed back pipe 71 to be closed, and when the discharge is performed, the three-way electromagnetic valve 72 is positioned at one end opening of the feed delivery pipe to be closed.

Working principle: the feed pipe 3 sprays slurry downwards from the upper end of the prilling tower 1 through the nozzle 31, meanwhile, the first air injection nozzle 222 and the second air injection nozzle 223 blow high-temperature hot air into the prilling tower 1 from the directions of the upper end and the lower end respectively, so that slurry particles are quickly evaporated and dried to form particles, the particles fall into a coarse filtration assembly, the particles are driven to move on the coarse screening plate 41 through rotation of the stirring impeller 42 and fall from the coarse screening holes 411, the particles are enabled to be more uniform, the particles fall onto the fine screening plate 512 of the screening hopper 51 downwards, the particles are driven to move towards the edge of the fine screening plate 512 through rotation of the scraping frame 53 and roll from the discharge opening 513 to the bottom end of the prilling tower 1, meanwhile, the particles with small size fall down through the fine screening holes 5121 and fall into the feed-back pipe under the vibration action of the vibration motor 52, the feed-back device 7 is driven by the rotation motor 74 to realize suction and discharge of the particles through the rotation of the rotation motor 74, so that the fine particles are re-sprayed into the prilling tower 1, so that the particles can be re-mixed with the slurry, and new particles are formed.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. The preparation equipment applied to the carbon nano tube master batch is characterized by comprising a granulating tower (1), a heating device and a material returning device (7), wherein the heating device is arranged on one side of the granulating tower (1), the heating device comprises a heater (2), a blower (21) and a heating pipe (22), an air outlet of the blower is connected with the heater (2), an air outlet of the heater (2) is connected with the heating pipe (22), one end of the heating pipe (22) enters the center of the top end of an inner cavity of the granulating tower (1) and is provided with a first air injection pipe orifice (222), a branch pipe (221) is arranged on one side of the heating pipe (22), one end of the branch pipe (221) horizontally penetrates through the granulating tower (1) and is provided with a second air injection orifice, and the first air injection pipe orifice (222) and the second air injection pipe orifice (223) are oppositely arranged up and down; a feed pipe (3) is arranged at the top end of the granulating tower (1), one end of the feed pipe (3) longitudinally penetrates through the first air injection pipe orifice (222) and a nozzle (31) is arranged in the first air injection pipe orifice (222);

the utility model discloses a granulation tower, including granulation tower (1), coarse screen subassembly (4), fine screen subassembly (5) and be used for driving coarse screen subassembly (4) and fine screen subassembly (5) drive assembly (6) are equipped with discharge gate (11) in the bottom of granulation tower (1), coarse screen subassembly (4) include coarse screen board (41) and stirring impeller (42), coarse screen board (41) level sets up in granulation tower (1), has seted up a plurality of coarse screen holes (411) on the coarse screen board (41), coarse screen board (41) center rotation sets up stirring impeller (42); the utility model discloses a granulating tower (1), including sieve subassembly (5), sieve subassembly (5) are located coarse screen subassembly (4) below, sieve subassembly (5) are including sieving fill (51), vibrating motor (52), scrape work or material rest (53), sieve fill (51) upper end lateral wall and prilling tower (1) inner wall connection through a plurality of elastic support (54), sieve fill (51) bottom for the inclined plane setting and install vibrating motor (52), and sieve fill (51) bottom one end slope is equipped with the conveying pipeline, the conveying pipeline runs through prilling tower (1) and is connected with feed back device (7), and feed back device (7) are arranged in carrying the granule that the size is less again to prilling tower (1), sieve fill (51) middle part level is equipped with fine screen plate (512), be equipped with a plurality of fine screen hole (5121) on fine screen plate (512), sieve fill (51) are located fine screen plate (512) lateral wall edge circumference and have been seted up a plurality of bin outlet (513), scrape work or material rest (53) setting on fine screen plate (512), scrape work or material rest (53) including sieve plate (531) and evenly distributed in the inner wall (532) of sieve (532) and scraping rod (532) are all set up on arc-shaped rod (532), the bottom of each scraping rod (532) is provided with a soft rubber scraping blade (5321); the driving assembly (6) is located between the coarse screen assembly (4) and the fine screen assembly (5), the driving assembly (6) comprises a gear box (61), a transmission shaft (62) and a driving motor (63), the gear box (61) is arranged at the center of an inner cavity of the granulating tower (1), a plurality of supporting rods (611) are fixedly connected with the inner wall of the granulating tower (1) on the side wall of the upper end of the gear box (61), the transmission shaft (62) is horizontally penetrated and arranged on the gear box (61), two ends of the transmission shaft (62) are rotationally connected with the inner wall of the granulating tower (1), one end of the transmission shaft (62) is connected with the output end of the driving motor (63), the driving motor (63) is arranged on the outer wall of the granulating tower (1) and drives the transmission shaft (62) to rotate, and the transmission shaft (62) drives the stirring impeller (42) and the scraping frame (53) to rotate through gear matching.

2. The preparation equipment applied to carbon nano tube master batch according to claim 1, wherein the feed back device (7) comprises a feed back pipe (71), a three-way electromagnetic valve (72), a suction and discharge cylinder (73), a rotating motor (74) and a lifting component, the feed back pipe (71) is longitudinally arranged on one side of the granulating tower (1), the three-way electromagnetic valve (72) is arranged on the feed back pipe (71), one end of the three-way electromagnetic valve (72) is connected with the feed conveying pipe, the top end of the feed back pipe (71) is arranged in a bending way and enters the inner cavity of the granulating tower (1), the bottom end of the feed back pipe (71) is connected with the top end of the suction and discharge cylinder (73), a telescopic air bag (731) is arranged at the upper end of the inner cavity of the suction and discharge cylinder (73), the top end of the telescopic air bag (731) is arranged in an opening way, the rotating motor (74) is arranged on the side wall of the suction and discharge cylinder (73), and the rotating motor (74) drives the lifting seat (732) to lift and compress the telescopic air bag (731) through the lifting component, so that particles stacked at the bottom end of the feed back pipe (71) are blown into the granulating tower (1).

3. The preparation device for carbon nanotube master batch according to claim 2, wherein a filter screen (711) is arranged in the inner cavity of the lower end of the feed back pipe (71).

4. The preparation equipment applied to the carbon nano tube master batch according to claim 2, wherein the lifting assembly comprises a rotating disc (75), a linkage rod (76) and a hinging seat (77), the rotating disc (75) is longitudinally arranged, the center of the rotating disc (75) is fixedly connected with an output shaft of a rotating motor (74), protruding seats (751) are symmetrically arranged at two ends of the rotating disc (75), a fixed shaft (751) is vertically arranged on one protruding seat (751), one end of the linkage rod (76) is rotated on the fixed seat (531), the other end of the linkage rod (76) is hinged with the hinging seat (77), and the hinging seat (77) is fixedly arranged at the bottom of the lifting seat (732).

5. The preparation equipment for carbon nanotube master batch according to claim 4, wherein a controller (78) and a travel switch (79) are further arranged at the lower end of the inner cavity of the suction and discharge cylinder (73), the controller (78) is respectively electrically connected with the travel switch (79) and the three-way electromagnetic valve (72), and contacts of the travel switch (79) are respectively contacted with protruding seats (751) at two ends of the rotating disc (75), so that the contacts of the travel switch (79) are sequentially pressed through the two protruding seats (751) when the rotating disc (75) rotates.

6. The apparatus for preparing carbon nanotube master batch according to claim 1, wherein the stirring impeller (42) comprises a rotating shaft (421) and a plurality of stirring blades (422) uniformly distributed on the rotating shaft (421), and the stirring blades (422) are all arranged in an arc-shaped bending manner.

7. The preparation device for carbon nanotube master batch according to claim 1, wherein the peripheral edge of the fine screen plate (512) is arranged obliquely upwards, and the tail end of the scraping rod (532) is also arranged bent upwards and is matched with the fine screen plate (512).

8. The preparation device for carbon nanotube master batch according to claim 6, wherein the transmission shaft (62) is provided with a first bevel gear (621), the upper end and the lower end of the first bevel gear (621) are respectively connected with a second bevel gear (641) and a third bevel gear (651) in a meshed manner, the second bevel gear (641) and the third bevel gear (651) are respectively arranged on the upper connecting shaft (64) and the lower connecting shaft (65), the upper connecting shaft (64) and the lower connecting shaft (65) are respectively arranged at the upper end and the lower end of the gear box (61) in a rotating manner, and the upper connecting shaft (64) and the lower connecting shaft (65) are respectively connected with the rotating shaft (421) and the fixing seat (531).