Tube furnace for producing carbon nanotube powder

Abstract

The utility model relates to the technical field of carbon nano tube powder production, and discloses a tubular furnace for producing carbon nano tube powder, which comprises a furnace body, a heating roller, a fan and a collecting box, an isolating layer is arranged on the inner wall of the furnace body, an exhaust pipe is arranged at the top of the furnace body, a toxic gas filtering mechanism is fixedly arranged in the exhaust pipe, and the collecting box is arranged in the furnace body. A discharge pipe structure is arranged at the bottom of the furnace body, a rotating layer is arranged outside the heating roller, and stirring rods are arranged on the outer surface of the rotating layer. According to the tubular furnace for producing the carbon nanotube powder, powder materials are added into the containing cavity, the rotating layer drives the stirring rods to rotate and smash products, the draught fan conveys gas into the containing cavity, heating is conducted through the electric heating wire, the heated gas machines the products along with rotation of the rotating layer, and after machining is completed, the valve is opened; products fall into the collecting box through the exhaust pipe structure, waste gas generated in the machining process is sucked into the exhaust pipe by the exhaust fan to be filtered, and the waste gas is exhausted after being filtered.

Description

Technical Field

[0001] This utility model relates to the field of carbon nanotube powder production technology, specifically a tube furnace for producing carbon nanotube powder. Background Technology

[0002] Tube furnaces are mainly used in industries such as metallurgy, glass, heat treatment, lithium battery positive and negative electrode materials, new energy, and abrasives. They are specialized equipment for measuring materials under specific temperature conditions. The furnaces have a simple structure, are easy to operate and control, and can produce continuously. These tube furnaces are high-performance, energy-efficient new electric furnaces developed using internationally advanced technology. They are available in various types, including single-tube, double-tube, horizontal, openable, vertical, single-temperature zone, dual-temperature zone, and triple-temperature zone furnaces. They are primarily used in universities, research institutes, and industrial and mining enterprises for experiments and small-batch production. They feature safety and reliability, simple operation, high temperature control accuracy, good heat preservation, a wide temperature range, high furnace temperature uniformity, multiple temperature zones, optional atmospheres, and vacuum furnace types. Single setpoint or 30-segment programmable controllers are available. Energy-saving ceramic fiber materials and a double-layer structure can reduce the surface temperature to room temperature. They have a long uniform temperature zone, are easy to operate, have reliable sealing, and high overall performance indicators, placing them at a leading level in China. The furnace tube can be made of materials such as heat-resistant steel, quartz glass, or ceramic tubes. Carbon nanotubes, also known as buckytubes, are one-dimensional quantum materials with a special structure. Their radial dimensions are on the nanometer scale, and their axial dimensions are on the micrometer scale. Both ends of the tube are basically sealed. Carbon nanotubes are mainly composed of several to dozens of layers of coaxial cylindrical tubes with carbon atoms arranged in a hexagonal pattern. The layers maintain a fixed distance of about 0.34 nm, and the diameter is generally 2–20 nm. Based on the different orientations of the carbon hexagons along the axial direction, they can be divided into three types: zigzag, armchair, and spiral. Spiral carbon nanotubes are chiral, while zigzag and armchair carbon nanotubes are not. The production of carbon nanotubes requires the use of powder materials, and the preparation of powder materials requires the use of tube furnaces. The production of carbon nanotube powder generates not only air but also many toxic gases. These toxic gases cannot be directly emitted, but ordinary tube furnaces directly emit these gases, causing pollution to the surrounding air. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a tube furnace for producing carbon nanotube powder, which has the advantages of filtering and then releasing the generated toxic gases. This solves the problem that in the chemical industry, many powder materials need to be processed, but the processing of powder materials generates not only air but also many toxic gases, and the direct discharge of toxic gases will pollute the surrounding air.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model provides the following technical solution: a tubular furnace for producing carbon nanotube powder, comprising a furnace body, a heating roller, a fan, and a collection box. The inner wall of the furnace body is provided with an isolation layer. An exhaust pipe is fixedly provided at the top of the furnace body. A toxic gas filtration mechanism is fixedly provided inside the exhaust pipe. A discharge pipe structure is provided at the bottom of the furnace body. A rotating layer is provided outside the heating roller. A stirring rod is fixedly provided on the outer surface of the rotating layer. An electric heating wire is provided inside the heating roller. The collection box is located below the discharge pipe structure. The fan is connected to the bottom left side of the furnace body through a connecting pipe.

[0007] Preferably, both the blower and the furnace body are fixedly equipped with positioning frames at their bottoms.

[0008] Preferably, locking screws are threaded onto the inner walls of both sides of the positioning frame, and a U-shaped clamping plate is movably connected to the end of the locking screw near the collection box, the U-shaped clamping plate engaging with the side surface of the collection box.

[0009] Preferably, a valve is provided at the connection between the discharge pipe structure and the furnace body.

[0010] Preferably, an air intake device is fixedly installed inside the exhaust pipe. The air intake device includes an air exchange fan and a filter structure, with the air exchange fan located above the filter structure.

[0011] Preferably, the toxic gas filtration mechanism includes activated carbon, a purification adsorption material, and a filter membrane, with the activated carbon located at the bottom, the filter membrane at the top, and the purification adsorption material located between the activated carbon and the filter membrane.

[0012] Preferably, the collection box has a handle on the front and transfer wheels on the bottom.

[0013] Compared with the prior art, this utility model provides a tube furnace for producing carbon nanotube powder, which has the following beneficial effects:

[0014] This tubular furnace for producing carbon nanotube powder works by adding powder material into a cavity, where a rotating layer drives a stirring rod to break up the powder material, facilitating processing. A blower delivers gas into the cavity through an exhaust pipe, where it is heated by heating wires. The heated gas, along with the rotating layer, processes the powder material. An internal insulation layer prevents heat loss, improving processing efficiency. After processing, a valve opens, and the powder material falls into a collection box through a discharge pipe. Simultaneously, waste gas generated during processing is drawn into the exhaust pipe by a ventilation fan for filtration before being discharged. The exhaust pipe is equipped with a toxic gas filtration mechanism and a suction device. The toxic gas filtration mechanism includes activated carbon, purification adsorption materials, and a filter membrane for more effective gas filtration. The suction device includes a filter structure and a ventilation fan to ensure proper exhaust of waste gas. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the toxic gas filtration mechanism of this utility model.

[0017] Figure 3 This is a schematic diagram of the U-shaped card plate structure of this utility model.

[0018] The components include: 1. Furnace body; 2. Isolation layer; 3. Rotating layer; 4. Positioning frame; 5. Connecting pipe; 6. Fan; 7. Transfer wheel; 8. Collection box; 9. Handle; 10. Locking screw; 11. Discharge pipe structure; 12. Valve; 13. Heating wire; 14. Heating roller; 15. Stirring rod; 16. Air intake device; 1601. Ventilation fan; 1602. Filter structure; 17. Toxic gas filtration mechanism; 1701. Activated carbon; 1702. Purification and adsorption material; 1703. Filter membrane; 18. Exhaust pipe; 19. Chamber; 20. U-shaped clamping plate. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 A tube furnace for producing carbon nanotube powder includes a furnace body 1, a heating roller 14, a blower 6 and a collection box 8, with an isolation layer 2 provided on the inner wall of the furnace body 1.

[0021] In the first embodiment of this utility model, an exhaust pipe 18 is fixedly installed on the top of the furnace body 1. An air intake device 16 is fixedly installed inside the exhaust pipe 18. The air intake device 16 includes a ventilation fan 1601 and a filter structure 1602. The ventilation fan 1601 is located above the filter structure 1602. A toxic gas filtration mechanism 17 is fixedly installed inside the exhaust pipe 18. The toxic gas filtration mechanism 17 includes activated carbon 1701, a purification adsorption material 1702, and a filter membrane 1703. The activated carbon 1701 is located at the bottom, the filter membrane 1703 is located at the top, and the purification adsorption material 1702 is located between the activated carbon 1701 and the filter membrane 1703. A discharge pipe structure 11 is provided at the bottom of the furnace body 1. A valve 12 is provided at the connection between the discharge pipe structure 11 and the furnace body 1.

[0022] In the second embodiment of this utility model, a rotating layer 3 is provided on the outside of the heating roller 14, and an agitator 15 is fixedly provided on the outer surface of the rotating layer 3. An electric heating wire 13 is provided inside the heating roller 14. The collection box 8 is located below the discharge pipe structure 11. A handle 9 is provided on the front of the collection box 8. A transfer wheel 7 is provided at the bottom of the collection box 8. The fan 6 is connected to the bottom left side of the furnace body 1 through a connecting pipe 5. A positioning frame 4 is fixedly provided at the bottom of both the fan 6 and the furnace body 1. Locking screws 10 are threadedly connected to the inner walls on both sides of the positioning frame 4. A U-shaped clamping plate 20 is movably connected to the end of the locking screw 10 near the collection box 8. The U-shaped clamping plate 20 is engaged with the side surface of the collection box 8.

[0023] In use, powder material is added into the cavity 19, and the rotating layer 3 drives the stirring rod 15 to start stirring. The blower 6 delivers air into the cavity 19 along the connecting pipe 5 and heats it through the heating wire 13. The heated gas processes the product as the rotating layer 3 rotates. The isolation layer 2 inside the furnace body 1 prevents heat from easily dissipating and improves processing efficiency. After processing, the valve 12 is opened, and the powder material falls into the collection box 8 through the discharge pipe structure 11. The collection box 8 has a handle 9 on the front and a transfer wheel 7 at the bottom for easy handling. At the same time, there are U-shaped clamps 20 on both sides of the collection box 8 to lock it in place and prevent it from sliding, which is conducive to the collection of powder material. Meanwhile, the exhaust gas generated during the processing will be drawn into the exhaust pipe 18 by the ventilation fan 1601. First, it will pass through the filter structure 1602 to filter out some larger particles. Then, it will pass through the toxic gas filter mechanism 17 for filtration. The exhaust gas will first pass through the activated carbon 1701 to remove odors and adsorb smaller particles and impurities. Then, it will pass through the purification adsorption material 1702 to adsorb and degrade harmful substances. Finally, it will pass through the filter membrane 1703 to further remove impurities. After filtration, it will be discharged.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tube furnace for producing carbon nanotube powder, comprising a furnace body (1), a heating roller (14), a blower (6), and a collection box (8), characterized in that: The furnace body (1) has an isolation layer (2) on its inner wall. The furnace body (1) has an exhaust pipe (18) fixed on its top. The exhaust pipe (18) has a toxic gas filter mechanism (17) fixed inside. The furnace body (1) has a discharge pipe structure (11) at its bottom. The heating roller (14) has a rotating layer (3) on its outside. The rotating layer (3) has a stirring rod (15) fixed on its outer surface. The heating roller (14) has a heating wire (13) inside. The collection box (8) is located below the discharge pipe structure (11). The fan (6) is connected to the bottom left side of the furnace body (1) through a connecting pipe (5).

2. The tube furnace for producing carbon nanotube powder according to claim 1, characterized in that: The bottom of both the blower (6) and the furnace body (1) is fixedly equipped with a positioning frame (4).

3. A tube furnace for producing carbon nanotube powder according to claim 2, characterized in that: Locking screws (10) are threaded onto the inner walls on both sides of the positioning frame (4).

4. A tube furnace for producing carbon nanotube powder according to claim 3, characterized in that: The locking screw (10) is movably connected to a U-shaped clamp (20) at one end near the collection box (8), and the U-shaped clamp (20) engages with the side surface of the collection box (8).

5. A tube furnace for producing carbon nanotube powder according to claim 1, characterized in that: A valve (12) is provided at the connection between the discharge pipe structure (11) and the furnace body (1).

6. A tube furnace for producing carbon nanotube powder according to claim 1, characterized in that: The exhaust pipe (18) is fixedly equipped with an air intake device (16), which includes an air exchange fan (1601) and a filter structure (1602). The air exchange fan (1601) is located above the filter structure (1602).

7. A tube furnace for producing carbon nanotube powder according to claim 1, characterized in that: The toxic gas filtration mechanism (17) includes activated carbon (1701), purification adsorption material (1702) and filter membrane (1703). The activated carbon (1701) is located at the bottom, the filter membrane (1703) is located at the top, and the purification adsorption material (1702) is located between the activated carbon (1701) and the filter membrane (1703).

8. A tube furnace for producing carbon nanotube powder according to claim 1, characterized in that: The collection box (8) has a handle (9) on the front and transfer wheels (7) on the bottom.

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