A continuous synthesis device for carbon nanotubes

Abstract

The present invention proposes a carbon nanotube continuous synthesis device, which belongs to the field of structural design and manufacturing technology of electric heating industrial kiln equipment. The double anti-adhesion structure is adopted to solve the problem of long manufacturing time and low working efficiency caused by the wall adhesion phenomenon of existing nano powders in the manufacturing process, and can realize continuous production. It includes a supporting platform, a kiln body, a discharge collection system, a transmission system, a hydraulic lifting device, a feeding system, an exhaust gas treatment system and other parts, and is used for the synthesis and preparation of carbon nanotubes.

Description

Technical Field

[0001] The present invention relates to the field of carbon nano material preparation devices, in particular to an electrically heated continuous high-temperature carbon nanotube synthesis device, and belongs to the technical field of structural design and manufacturing of electrically heated industrial kiln equipment. Background Art

[0002] As a new type of nano powder material, carbon nanotubes have entered people's lives. With the increasing application, the market demand for carbon nanotubes is also increasing. However, there are still a series of technical difficulties in the production process of carbon nanotubes. In the production process of carbon nanotubes, since the nanomaterials themselves are very fine and have a certain viscosity, it is easy for the nanomaterials to adhere to the kiln wall during the preparation process, resulting in a high defective rate of carbon nanotubes. Most of the existing synthesis equipment is still intermittent synthesis equipment, with a long production cycle, and the structural characteristics are also difficult to meet the reaction conditions of carbon nanotubes. Summary of the invention

[0003] In order to solve the problems in the prior art, the present invention provides a carbon nanotube continuous synthesis device.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a carbon nanotube continuous synthesis device, which includes a kiln body, a support platform, support rollers, a mechanical transmission component and a material recovery device, the bottom of the support platform is connected to a lifting device, the support rollers, the mechanical transmission component and the material recovery device are all arranged on the upper part of the support platform, the kiln body is supported by support rollers at the front and back, the kiln body includes an air inlet pipeline, a feeding port, a conveying blade, a discharge port and a striking device, the front end of the kiln body is provided with a feeding port, the front end of the kiln body is connected to the mechanical transmission component, the mechanical transmission component is the driving part of the kiln body, the A discharge port is provided at the rear of the kiln body, the material recovery device is connected to the discharge port, an insulation device is provided outside the kiln body, a plurality of induction heating coils are evenly distributed on the circumference of the insulation device close to the outer side of the kiln body, a plurality of conveying blades are evenly distributed on the circumference of the kiln wall inside the kiln body, an air intake pipeline is arranged at the center of the kiln body, a plurality of striking devices are evenly distributed on the circumference of the outer side wall of the kiln body, the striking device comprises a sliding rod, a striking block, a counterweight block and a bracket, the bracket is connected to the kiln body, the sliding rod slides in the bracket, a striking block is provided on one end of the sliding rod close to the kiln body, and a counterweight block is provided on the other end of the sliding rod.

[0005] Furthermore, the insulation device includes an insulation felt and an insulation shell, the insulation felt is fixed in the inner cavity of the insulation shell, the outside of the induction heating coil is sealed by the insulation felt, and both ends of the insulation shell are respectively provided with an inlet dynamic and static seal and an outlet dynamic and static seal.

[0006] Furthermore, a spiral feeder is provided between the kiln body and the feeding port.

[0007] Furthermore, the material recovery device includes a material recovery device and a tail gas recovery device, the tail gas recovery device is located at the upper end of the material recovery device and is connected to the material recovery device, and the material recovery device is connected to the discharge port.

[0008] Furthermore, the mechanical assembly includes a transmission motor and a transmission chain. The transmission chain is arranged on the outer surface of the front end of the kiln body, and the transmission motor is connected to the transmission chain.

[0009] Furthermore, the thermal insulation felt is made of thermal insulation materials, and the thermal insulation materials include carbon felt, graphite felt and / or alumina.

[0010] Furthermore, the kiln body and the heat-insulating shell are made of metal plate materials, and the kiln body and the heat-insulating shell are respectively integrally sealed and welded.

[0011] Furthermore, the gas introduced into the air inlet pipeline is a carbon source gas and an inert protective gas.

[0012] Furthermore, the induction heating coil is made of a hollow copper tube.

[0013] Furthermore, the air intake pipeline is provided with a mass flow meter.

[0014] Compared with the prior art, the invention has the following beneficial effects: the invention effectively solves the problem of long manufacturing time and low working efficiency caused by the wall sticking phenomenon of the existing nano powder in the manufacturing process. The invention adopts a double anti-adhesion structure from both the inside and outside of the synthesis device to achieve a double anti-adhesion effect of the nano powder, with significant protection effect, saving production time, shortening the production cycle, improving production capacity, and effectively increasing the yield rate of the nano powder in the reaction preparation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view of a carbon nanotube continuous synthesis device according to the present invention.

[0016] Figure 2 This is a cross-sectional view of a kiln of a carbon nanotube continuous synthesis device according to the present invention.

[0017] Figure 3 This is a partial enlarged view of the striking device of the carbon nanotube continuous synthesis device described in the present invention.

[0018] 1-support platform, 2-lifting device, 3-transmission motor, 4-inlet pipeline, 5-transmission chain, 6-feeding port, 7-support roller, 8-inlet dynamic and static seal, 9-transmission blade, 10-insulation shell, 11-induction heating coil, 12-strike device, 13-kiln body, 14-exhaust gas collection device, 15-material recovery device, 16-discharge port, 17-spiral feed pipe, 18-export dynamic and static seal, 19-counterweight block, 20-sliding rod, 21-strike block, 22-bracket. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] See also Figure 1-3The present embodiment is described as a continuous synthesis device of carbon nanotubes, wherein there is a gap between a kiln body 13 and a heat-insulating shell 10, the kiln body 13 can rotate in the heat-insulating shell 10, and both ends of the heat-insulating shell 10 are respectively provided with an inlet dynamic and static seal 8 and an outlet dynamic and static seal 18, an induction heating coil 11 is arranged in the heat-insulating shell 10, a spiral feeding pipe 17 is arranged on the right end face of the kiln body 13, and the spiral feeding pipe 17 is connected to the feeding port 6, a plurality of conveying blades 9 are arranged circumferentially on the kiln wall on the inner side of the kiln body 13, and a plurality of striking devices 12 are evenly arranged circumferentially on the outer wall of the kiln body 13, the striking device comprises a sliding rod 20, the sliding rod 20 can move up and down along the diameter direction of the kiln body 13, a striking block 21 is arranged at one end of the sliding rod 20 close to the kiln body 13, and a counterweight block 19 is arranged at the other end of the sliding rod, The left and right sides of the heat-insulating shell 10 are provided with dynamic and static seals 8. A transmission chain 5 is fixed at the center of the right end face of the kiln body 13. The transmission chain 5 is connected to the transmission motor 3 and is a driving device for rotating the kiln. In order to achieve a faster use effect, this embodiment is provided with a lifting device 2 under the support platform 1, which can tilt the kiln at an angle, so that the material inside the kiln moves to the left under the drive of the conveying blade 9. The speed can be controlled to realize the conveying time of the material inside the kiln body 13, thereby achieving the control of the reaction time. The material recovery device 15 of this embodiment has a discharge port 16 inside, and the discharge port 16 is controlled by an electromagnetic valve. The material recovery device 15 is provided with an exhaust gas recovery device 14 to ensure the safe and stable operation of the kiln. The specific implementation process of using the new type is as follows: adjust the lifting device 2 to tilt at a certain angle,After setting the speed, start the transmission motor 3, set the kiln temperature, and after the temperature reaches the reaction requirement, put the material into the feeding port 6, and the material is driven to enter the kiln body 13 through the rotation of the spiral feeding pipe 17. The carbon source gas and the inert protective gas are introduced into the kiln body 13 through the air intake pipe 4. The material moves to the left inside the kiln body driven by the conveying blades 9. The kiln body 13 rotates and the gravity striking device 12 strikes the kiln body 13 to prevent the material from sticking to the wall. The material moves along the inclined surface of the conveying blades 9 in the kiln body 13 in the direction away from the kiln wall. The nano powder is moved to the end of the conveying blade 9 and then falls onto the kiln wall below due to gravity. After a short period of lifting and falling, the nano powder is effectively beaten to prevent the agglomeration of the nano powder and make the material catalyst more thorough during the reaction. A striking device 12 is provided on the outer wall of the kiln body 13 and placed between the kiln body 13 and the insulation shell 10. When the striking device 12 moves to the lower end of the kiln body 13 under the action of gravity, the counterweight block 19 on the sliding rod 20 pulls the striking block 21 away from the outer wall of the kiln body 13 due to gravity. As the kiln body 13 rotates, the striking device 12 gradually moves to the top of the kiln body 13. Under the action of gravity, the counterweight 19 drives the sliding rod 20 to act on the striking block 21. The designed striking block 21 strikes the kiln body 13. During the striking process, the sliding rod 20 is completely due to the action of gravity. Therefore, when the striking device 12 moves to the left or right side of the kiln body 13, it will not strike the kiln body 13. When the striking device moves to the top, the static friction force generated by the bracket 22 can no longer balance the component of gravity provided by the counterweight 19. The block 19 drives the sliding rod 20 and the striking block 21 to move toward the kiln body 13. This movement process is instantaneous, so the striking generated during this movement process will cause the kiln body 13 to vibrate slightly. The combined effect of multiple striking devices will increase the overall effect of this vibration to prevent the nanomaterial from adhering to the kiln and causing insufficient reaction. When the striking device 12 leaves the highest position of the kiln body 13 and moves to the lowest position, the counterweight block 19 can drive the sliding rod 20 away from the outside of the kiln body 13 to prepare for the next strike.

[0021] In this embodiment, when the material completes the reaction and moves to the vicinity of the discharge port 16, the discharge port is opened, and the material rotates into the material recovery device 15, and the gas in the kiln is recovered and processed by the tail gas recovery device 14 and then discharged. After the material in the material recovery device is extracted by vacuum negative pressure, the material is added again from the feed port 6 to react again.

[0022] The above is a detailed introduction to a carbon nanotube continuous synthesis device provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A carbon nanotube continuous synthesis device, characterized in that: It comprises a kiln body (13), a support platform (1), a support roller (7), a mechanical transmission component and a material recovery device. The bottom of the support platform (1) is connected to a lifting device (2). The support roller (7), the mechanical transmission component and the material recovery device are all arranged on the upper part of the support platform (1). The kiln body (13) is supported by the support roller (7) at the front and back. A feeding port (6) is arranged at the front end of the kiln body (13). The front end of the kiln body (13) is connected to the mechanical transmission component. The mechanical transmission component drives the kiln body (13) to rotate. A discharge port (16) is arranged at the rear of the kiln body (13). The material recovery device (15) is connected to the discharge port (16). A heat preservation device is arranged outside the kiln body (13). The heat preservation device is provided with a plurality of induction heating coils (11) evenly distributed on the circumference of the outer side of the kiln body (13); a plurality of conveying blades (9) are evenly distributed on the circumference of the inner kiln wall of the kiln body (13); an air intake pipeline (4) is arranged at the center of the inner side of the kiln body (13); a plurality of striking devices (12) are evenly distributed on the circumference of the outer side wall of the kiln body (13); the striking devices include a sliding rod (20), a striking block (21), a counterweight block (19) and a bracket (22); the bracket (22) is connected to the kiln body (13); the sliding rod (20) slides in the bracket (22); a striking block (21) is provided at one end of the sliding rod (20) close to the kiln body (13); and a counterweight block (19) is provided at the other end of the sliding rod (20).

2. A carbon nanotube continuous synthesis device according to claim 1, characterized in that: The heat-insulating device comprises a heat-insulating felt and a heat-insulating outer shell (10), wherein the heat-insulating felt is fixed in the inner cavity of the heat-insulating outer shell (10), the exterior of the induction heating coil (11) is sealed by the heat-insulating felt, and both ends of the heat-insulating outer shell (10) are respectively provided with an inlet dynamic and static seal (8) and an outlet dynamic and static seal (18).

3. The carbon nanotube continuous synthesis device according to claim 1, characterized in that: A screw feeder (17) is also provided between the kiln body (13) and the feeding port (6).

4. The carbon nanotube continuous synthesis device according to claim 1, characterized in that: The mechanical transmission assembly comprises a transmission motor (3) and a transmission chain (5), wherein the transmission chain (5) is arranged on the front outer surface of the kiln body (13), and the transmission motor (3) is connected to the transmission chain (5).

5. The carbon nanotube continuous synthesis device according to claim 1, characterized in that: The recovery device comprises a material recovery device (15) and an exhaust gas recovery device (14); the exhaust gas recovery device (14) is located at the upper end of the material recovery device (15) and is connected to the material recovery device (15); and the material recovery device (15) is connected to a discharge port (16).

6. The carbon nanotube continuous synthesis device according to claim 2, characterized in that: The thermal insulation felt is made of thermal insulation materials, and the thermal insulation materials include carbon felt, graphite felt and / or alumina.

7. The carbon nanotube continuous synthesis device according to claim 2, characterized in that: The kiln body (13) and the heat-insulating outer shell (10) are made of metal plate-shaped materials, and the kiln body (13) and the heat-insulating outer shell (10) are respectively integrally sealed and welded.

8. The carbon nanotube continuous synthesis device according to claim 1, characterized in that: The gas introduced into the air inlet pipeline (4) is a carbon source gas and an inert protective gas.

9. The carbon nanotube continuous synthesis device according to claim 1, characterized in that: The induction heating coil (11) is made of a hollow copper tube.

10. The carbon nanotube continuous synthesis device according to claim 1, characterized in that: The air intake pipeline (4) is provided with a mass flow meter.

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