A preparation device and method for graphene and carbon nanotube nanomaterials

Abstract

The invention relates to the field of material preparation, and discloses a preparation device and method for graphene and carbon nanotube nanomaterials, which solve the problems of low production efficiency and low safety in traditional preparation methods. The technical scheme thereof comprises a chemical vapor deposition device, a cooling mechanism is sleeved on the outer side of a discharge pipe of the chemical vapor deposition device, a collecting device for collecting the discharge of the discharge pipe is connected to the pipe mouth of the discharge pipe, an open exhaust device is arranged on the periphery of the collecting device and the discharge pipe, and the internal air pressure of the exhaust device is lower than the external air pressure, so as to properly handle hydrogen, effectively reduce the possibility of hydrogen explosion without affecting the preparation efficiency, and achieve a higher safety effect.

Description

Technical Field

[0001] The present invention relates to the field of material preparation, and more specifically, to a preparation device and method for nanomaterials such as graphene and carbon nanotubes. Background Art

[0002] Graphene and carbon nanotubes both have excellent properties such as high strength, high thermal conductivity, and high electrical conductivity, and are new materials that have attracted much attention in the 21st century. The continuous batch preparation of graphene and carbon nanotubes has good application prospects in the field of future functional materials and composite materials.

[0003] At present, the floating chemical vapor deposition method can realize the in-situ compounding and mass production of graphene and carbon nanotubes. However, in the process of preparing graphene and carbon nanotubes by this method, high temperature and hydrogen exist at the same time, and hydrogen is easy to explode at high temperature; the current method to prevent explosion is: the collection system is installed as a whole in a closed box, and the hydrogen in the reaction process is isolated from the outside air by the closed box, and nitrogen needs to be introduced into the closed box before and after production to exhaust the air and hydrogen, so as to achieve the purpose of explosion prevention;

[0004] Since the entire collection system is installed in the middle of a closed box, the volume of the box is huge, and the two gas replacement processes before and after production take a long time, which greatly wastes the time of the entire production process and greatly reduces production efficiency. At the same time, since the collection system motor and lighting equipment installed in the closed box need to be connected to the external power supply and control system through wires, the wires need to be drilled in the closed box, which will affect the overall gas tightness of the closed box. Once there is a leak in the closed box, the air can enter the box through the leak and explode when it encounters hydrogen at high temperature, which poses a great safety hazard. Therefore, the above method cannot effectively prevent the occurrence of explosion accidents and affects the efficiency of production and preparation. There is still an urgent need on the market for a method that can effectively reduce the possibility of hydrogen explosion in floating chemical vapor deposition without affecting the preparation efficiency. Summary of the invention

[0005] The purpose of the present invention is to provide a preparation device and method for graphene and carbon nanotube nanomaterials, so as to properly handle hydrogen and effectively reduce the possibility of hydrogen explosion without affecting the preparation efficiency.

[0006] The above technical purpose of the present invention is achieved through the following technical scheme: a preparation device for graphene, carbon nanotube nanomaterials, including chemical vapor deposition equipment, a cooling mechanism is provided on the outer side of a discharge pipe of the chemical vapor deposition equipment, a collecting device for collecting the discharge of the discharge pipe is connected to the pipe mouth of the discharge pipe, an open exhaust device is provided on the periphery of the collection device and the discharge pipe, and the internal air pressure of the exhaust device is lower than the external air pressure.

[0007] As a preferred embodiment of the present invention, the exhaust device includes an exhaust hood, an exhaust pipe, an exhaust fan and a plurality of air baffles; the collecting device is arranged inside a plurality of air baffles connected into a frame shape, the pipe mouth end of the discharge pipe passes through an air baffle and is arranged on the inner side of the air baffle, the interface between the discharge pipe and the air baffle is a sealed interface, the lower hood opening of the exhaust hood is suspended directly above the frame area surrounded by the air baffles, the air inlet of the exhaust fan is matched with the upper hood opening of the exhaust hood, the air outlet of the exhaust fan is connected to one end of the exhaust pipe, and the other end of the exhaust pipe leads to the outdoors.

[0008] As a preferred embodiment of the present invention, the cooling mechanism includes a hollow cooling ring mounted on the outside of the discharge pipe, the bottom end of the cooling ring is provided with a water inlet, the top end of the cooling ring is provided with a water outlet, the water inlet is connected to a cooling water pipe and cooling water is introduced into it, and the water outlet is connected to a drainage pipe and discharges used cooling water.

[0009] As a preferred embodiment of the present invention, the collecting device includes a supporting platform and a collecting roller, the air baffle is vertically arranged on the supporting platform, the collecting roller is provided with a U-shaped slide, the two automatic ends of the U-shaped slide are connected to the axis of the two ends of the collecting roller with a rotating motor, the supporting platform is provided with a slide rail perpendicular to the discharge pipe, and the U-shaped slide can slide on the slide rail.

[0010] As a preferred embodiment of the present invention, an air filling pipe is provided through the support platform, and the air filling pipe introduces nitrogen into the exhaust device.

[0011] As a preferred embodiment of the present invention, a picking hook is provided at the pipe mouth of the discharge pipe, and a through hole is penetrated through the air baffle plate opposite to the discharge pipe, and a sealing control sleeve is arranged at one end of the through hole facing the outside of the air baffle plate, and the handle end of the picking hook passes through the through hole and is arranged in the sealing control sleeve.

[0012] As a preferred embodiment of the present invention, a rope ear is provided on the inner side of the air baffle above the through hole, a rope hole is provided on the hook corresponding to the through hole, and an anti-slip rope is connected between the rope hole and the rope ear.

[0013] As a preferred embodiment of the present invention, the area of ​​the lower hood opening of the exhaust hood is larger than the area of ​​the frame surrounded by the air baffle plate, and the position height of the lower hood opening of the exhaust hood is lower than the top edge height of the air baffle plate.

[0014] As a preferred embodiment of the present invention, the surface of the collecting drum is provided with a polytetrafluoroethylene coating.

[0015] A method for preparing nanomaterials of graphene and carbon nanotubes comprises the following steps:

[0016] S1. Raise the chemical vapor deposition equipment to the required temperature;

[0017] S2, introducing argon gas into the furnace tube connected to the discharge pipe of the chemical vapor deposition equipment in advance, and at the same time introducing nitrogen gas into the exhaust device through the gas charging pipe, and turning on the exhaust fan to exhaust gas;

[0018] S3, using chemical vapor deposition equipment to inject raw materials into the furnace tube, and pass argon and hydrogen into the furnace tube, while injecting cooling water into the cooling ring, passing argon and hydrogen into the furnace tube, and blowing the prepared nanomaterial out from the discharge pipe;

[0019] S4, using a hook to guide the nanomaterial to adhere to a rolling collection drum, and using the collection drum to collect the nanomaterial;

[0020] S5. After the collection is completed, stop injecting the raw materials into the chemical vapor deposition equipment and stop introducing hydrogen, continue to introduce argon for ten minutes, and stop injecting cooling water into the cooling ring;

[0021] S6. Lower the air baffle in front of the collection system, take out the collection roller that has collected the nanomaterials, and replace it with a new one.

[0022] In summary, the present invention has the following beneficial effects: the cooling mechanism can cool down the hydrogen discharged from the discharge pipe, and the possibility of non-high-temperature hydrogen explosion can be greatly reduced; the collecting device can quickly collect the prepared nanomaterials directly under the coverage of the exhaust device, which can speed up the overall production efficiency, and the exhaust device is open, and the internal air pressure of the exhaust device is lower than the external air pressure. Under the action of the air pressure difference, the internal gas of the exhaust device will not leak out. Compared with the traditional preparation method, while greatly reducing the requirements for sealing, it also achieves the effect of preventing hydrogen leakage and explosion, which is more convenient and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the cooling mechanism and exhaust device structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the collecting device of the present invention;

[0025] Figure 3 yes Figure 1 Magnified view of area A.

[0026] In the figure: 1. Chemical vapor deposition equipment; 11. Discharge pipe; 12. Furnace tube; 2. Cooling ring; 3. Collecting roller; 31. U-shaped slide seat; 32. Slide rail; 33. Support platform; 4. Exhaust hood; 41. Air baffle; 42. Exhaust fan; 43. Exhaust pipe; 5. Pick hook; 51. Sealing control sleeve; 52. Rope ear; 53. Anti-slip rope; 6. Inflatable tube. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0028] like Figure 1 As shown, the present invention provides a preparation device for graphene and carbon nanotube nanomaterials, including a chemical vapor deposition device 1. The present invention adopts a three-temperature zone chemical vapor deposition device 1. The principle and general process of preparing the nanomaterial are: heating a furnace tube 12 for reacting raw materials, then putting the raw materials into the furnace tube 12 to react, and then introducing a carrier gas from the front end of the furnace tube 12. The present invention adopts argon and hydrogen. The prepared nanomaterial is blown out and collected from the rear end of the furnace tube 12, that is, the discharge pipe 11, to complete the preparation of the nanomaterial. The improvement of the present invention is that the hydrogen is safely treated without affecting the preparation efficiency.

[0029] A cooling mechanism is provided on the outside of the discharge pipe 11 of the chemical vapor deposition equipment 1, and a collecting device for collecting the discharge of the discharge pipe 11 is connected to the pipe mouth of the discharge pipe 11. An open exhaust device is provided on the periphery of the collecting device and the discharge pipe 11, and the internal air pressure of the exhaust device is lower than the external air pressure.

[0030] In the preparation equipment of the present invention, the cooling mechanism can cool down the hydrogen discharged from the discharge pipe 11, and the possibility of non-high-temperature hydrogen explosion can be greatly reduced; the collecting device can quickly collect the prepared nanomaterials directly under the coverage of the exhaust device, which can speed up the overall production efficiency, and the exhaust device is open, and the internal air pressure of the exhaust device is lower than the external air pressure. Under the action of the air pressure difference, the internal gas of the exhaust device will not leak out. Compared with the traditional preparation method, while greatly reducing the requirements for sealing, it also achieves the effect of preventing hydrogen leakage and explosion, which is more convenient and practical.

[0031] like Figure 1 and 2As shown below, a specific embodiment of the exhaust device of the present invention is shown, the exhaust device includes an exhaust hood 4, an exhaust pipe 43, an exhaust fan 42 and a plurality of air baffles 41; since the exhaust device of the present invention is used for exhaust explosion prevention, the exhaust fan 42 used in the present invention is an explosion-proof exhaust fan 42, and the exhaust air volume is 10-10000m³ / h;

[0032] like Figure 1 and 2 As shown, the collecting device is arranged inside a plurality of air baffles 41 connected into a frame shape, the pipe mouth end of the discharge pipe 11 passes through an air baffle 41 and is arranged on the inner side of the air baffle 41, the interface between the discharge pipe 11 and the air baffle 41 is a sealed interface, the lower cover opening of the exhaust hood 4 is suspended above the frame area surrounded by the air baffle 41, the air inlet of the exhaust fan 42 is matched with the upper cover opening of the exhaust hood 4, and the air outlet of the exhaust fan 42 is connected to one end of the exhaust pipe 43. In order to achieve better exhaust and explosion-proof purposes, in actual use, a combination of multiple exhaust pipes and exhaust fans 42 will be used to achieve better exhaust and explosion-proof effects. The internal air pressure of the exhaust device formed by the strong wind force of the exhaust fan 42 is significantly lower than the external air pressure, so that the internal gas will not leak out.

[0033] The other end of the exhaust pipe 43 leads to the outdoors. In order to prevent explosions caused by lightning during thunderstorms, a lightning protection treatment is also performed at the outdoor end, such as installing a lightning rod.

[0034] The area of ​​the lower hood opening of the exhaust hood 4 is larger than the area of ​​the frame formed by the air baffle 41; it fully ensures that the outlet end of the discharge pipe 11 and the collecting device can be within the range of the exhaust device, and because hydrogen is lighter than air, after the hydrogen reaches the area of ​​the exhaust device, it will naturally float upward to the position of the exhaust hood 4, and at this time the exhaust fan 42 is always working, and the exhaust fan 42 will continue to suck up and discharge the hydrogen in the exhaust hood 4. Due to the powerful exhaust capacity of the explosion-proof exhaust fan 42, the air pressure in the area below the exhaust hood 4 is lower than the external air pressure, so that the surrounding air will also be sucked up, so as to achieve the purpose of preventing hydrogen from escaping from the lower hood opening of the exhaust hood 4;

[0035] like Figure 1 and 2 As shown, the position height of the lower hood opening of the exhaust hood 4 is lower than the top edge height of the air baffle plate 41. During implementation, the height difference between the lower hood opening of the exhaust hood 4 and the top edge of the air baffle plate 41 can be adjusted according to actual needs to prevent hydrogen leakage.

[0036] like Figure 1As shown below, a specific embodiment of the cooling mechanism of the present invention includes a hollow cooling ring 2 sleeved on the outside of the discharge pipe 11, the cooling ring 2 is directly attached to the discharge pipe 11, a water inlet is provided at the bottom end of the cooling ring 2, a water outlet is provided at the top end of the cooling ring 2, the water inlet is connected to a cooling water pipe and cooling water is introduced, and the water outlet is connected to a drainage pipe and the used cooling water is passed out;

[0037] When water continues to flow into the bottom of the cooling ring 2 and drain out of the top, it can ensure that the discharge pipe 11 in direct contact with the cooling ring 2 can be cooled, so that the hydrogen discharged from the discharge pipe 11 can be cooled, making it safer when handling hydrogen.

[0038] like Figure 1 and 2 As shown, the following is a specific embodiment of the collecting device of the present invention, the collecting device includes a supporting platform 33 and a collecting roller 3, the air baffle 41 is vertically arranged on the supporting platform 33, the collecting roller 3 is provided with a U-shaped slide 31, the two automatic ends of the U-shaped slide 31 and the axis of the two ends of the collecting roller 3 are connected with a rotating motor, the rotating motor can drive the collecting roller 3 to roll when it works, the supporting platform 33 is provided with a slide rail 32 which is vertical to the discharge pipe 11, the U-shaped slide 31 can slide on the slide rail 32, the structure between the U-shaped slide 31 and the slide rail 32 can refer to the structure of the linear motor, because the existing slide and guide rail technology is very mature, it will not be described here;

[0039] Since the prepared nanomaterial is in the form of aerogel and has a certain viscosity, after the nanomaterial is blown out by the carrier gas, the nanomaterial adheres to the collecting roller 3 connected to the pipe opening of the discharge pipe 11 under the action of the carrier gas flow, and the collecting roller 3 can be used for adhesion collection;

[0040] Moreover, the collecting roller 3 can move back and forth in a direction perpendicular to the discharge pipe 11 when the U-shaped slide seat 31 slides, so that the nanomaterials can be evenly adhered and collected on the collecting roller 3; and the surface of the collecting roller 3 is provided with a polytetrafluoroethylene coating, and after the collection is completed, the nanomaterials can also be easily removed from the collecting roller 3, which is convenient and practical.

[0041] like Figure 2 As shown, the following is a further implementation scheme of the present invention. The support platform 33 is penetrated by an inflation pipe 6, and the inflation pipe 6 introduces nitrogen into the exhaust device. Under the upward lifting of the nitrogen, the hydrogen can be discharged faster, and before discharge, the concentration of hydrogen is lower under the mixing of nitrogen, which makes the exhaust safer. It should be noted that in actual operation, the amount of nitrogen introduced will be much smaller than the exhaust volume of the exhaust fan 42, so it will not cause the internal air pressure of the exhaust device to be greater than the external air pressure.

[0042] like Figure 1 and 3 As shown, the following is a further embodiment of the present invention, a hook 5 is provided at the mouth of the discharge pipe 11, a through hole is penetrated through the air baffle plate 41 facing the discharge pipe 11, a sealing control sleeve 51 is arranged at one end of the through hole facing the outside of the air baffle plate 41, and the handle end of the hook 5 passes through the through hole and is arranged in the sealing control sleeve 51; a rope ear 52 is provided at the position above the through hole on the inner side of the air baffle plate 41, and a rope hole is provided at the position of the hook 5 corresponding to the through hole, and an anti-drop rope 53 is connected between the rope hole and the rope ear 52;

[0043] The picking hook 5 can pick up the nanomaterials when they are discharged, and guide the aerogel-like nanomaterials to adhere to the collecting drum 3, making the collection process of the nanomaterials more convenient and quick; and the presence of the sealing control sleeve 51 can operate and control the picking hook 5 without affecting the air blocking of the air baffle 41, which is more convenient to use; the presence of the anti-slip rope 53 can ensure that the handle of the picking hook 5 is always within the range of the sealing control sleeve 51.

[0044] The present invention also provides a method for preparing nanomaterials using the above-mentioned graphene and carbon nanotube nanomaterial preparation device, comprising the following steps:

[0045] S1, raising the chemical vapor deposition device 1 to a desired temperature to prepare nanomaterials;

[0046] S2, introducing argon gas into the furnace tube 12 connected to the discharge pipe 11 of the chemical vapor deposition equipment 1 in advance, and at the same time introducing nitrogen gas into the exhaust device through the gas charging pipe 6, and turning on the exhaust fan 42 for exhaust;

[0047] S3, using the chemical vapor deposition equipment 1 to inject raw materials into the furnace tube 12, and passing argon and hydrogen into the furnace tube 12, while injecting cooling water into the cooling ring 2, passing argon and hydrogen into the furnace tube 12, and blowing the prepared nanomaterial out from the discharge pipe 11;

[0048] S4, using the hook 5 to guide the nano-material to adhere to the rolling collection drum 3, and using the collection drum 3 to collect the nano-material;

[0049] S5. After the collection is completed, stop injecting the raw material into the chemical vapor deposition device 1 and stop introducing hydrogen, continue to introduce argon for ten minutes, and stop injecting cooling water into the cooling ring 2;

[0050] S6, lower the air baffle 41 in front of the collection system, take out the collection roller 3 that has collected the nanomaterials, and replace it with a new collection roller 3; after all are completed, start again from S2 to start the next preparation.

[0051] The traditional production process is: close the sealed box door and check the airtightness of the sealed box; introduce argon into the furnace tube 12 of the chemical vapor deposition equipment 1, and introduce nitrogen into the sealed box to replace the air in the box, until the air concentration in the box is lower than 1% (usually about 2 hours); synthesize the required nanomaterials through traditional chemical vapor deposition, the synthesized nanomaterials are similar to aerogel in the furnace tube 12, and are blown out from the furnace tube 12 port under the action of carrier gases hydrogen and argon, and the nanomaterials are hooked and guided to stick to the roller and then continuously wound and collected as the roller rotates; after the collection is completed, the raw material injection of the front section of the chemical vapor deposition equipment 1 is closed and the hydrogen is closed, and the argon is maintained; at the same time, N2 is introduced into the sealed box to replace the hydrogen in the box, until the hydrogen concentration in the box is lower than 1% (usually about 2 hours); then open the material taking hatch in front of the sealed box, take out the collection roller 3 that has collected the nanomaterials, and replace it with a new roller.

[0052] The disadvantage of the traditional preparation method is that the entire nanomaterial collection process usually takes about 4-6 hours, and the two gas replacement times before and after collection take about 4 hours, which greatly increases the time of a production process, resulting in low production efficiency and high material costs, affecting the price, popularity and production efficiency of materials. At the same time, since the collection system motor and lighting equipment are installed in a closed box, they need to be connected to the external power supply and control system through wires, and the wires need to be drilled in the closed box. There needs to be a hatch on the closed box that can be opened to take out materials, and the hatch area is large. The ceramic tube is easy to crack at high temperatures. These factors may lead to the possibility of air leakage in the sealed box during the production process. Once the closed box leaks, air will enter the box and encounter hydrogen at high temperatures to cause an explosion, which poses a great safety hazard.

[0053] The advantage of the present invention is that the preparation equipment adopts an open layout, and a cooling mechanism is installed on the discharge pipe 11 of the chemical vapor deposition equipment 1. The cooling mechanism can reduce the temperature of the gas coming out of the discharge pipe 11 and reduce the gas temperature to below the ignition point of hydrogen. Air baffles 41 are installed around the collecting device, and a large-volume exhaust fan 42 and a large-area exhaust hood 4 are installed on the upper part. At the same time, the lower edge of the exhaust hood 4 is lower than the air baffle 41 by a certain height. Under the working conditions of continuous introduction of nitrogen from below and continuous exhaust by the exhaust fan 42 above, the hydrogen coming out of the pipe mouth of the discharge pipe 11 of the chemical vapor deposition equipment 1 can be immediately extracted and discharged to the outside, which saves the exhaust time twice in the production process and greatly increases the production efficiency. At the same time, since it is an open equipment, there is no need to worry about air entering and encountering hydrogen to cause an explosion, thereby eliminating safety hazards.

[0054] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A preparation device for nanomaterials such as graphene and carbon nanotubes, comprising a chemical vapor deposition device (1), characterized in that: The discharge pipe (11) of the chemical vapor deposition device (1) is provided with a cooling mechanism on the outside, the discharge pipe (11) is provided with a collecting device for collecting the discharge of the discharge pipe (11) at the pipe mouth, and an open exhaust device is provided on the periphery of the collecting device and the discharge pipe (11), and the internal air pressure of the exhaust device is lower than the external air pressure; The exhaust device comprises an exhaust hood (4), an exhaust pipe (43), an exhaust fan (42) and a plurality of air baffles (41); the collecting device is arranged inside a plurality of air baffles (41) connected to form a frame; the pipe mouth end of the discharge pipe (11) passes through an air baffle (41) and is arranged on the inner side of the air baffle (41); the interface between the discharge pipe (11) and the air baffle (41) is a sealed interface; the lower cover opening of the exhaust hood (4) is suspended above the frame area surrounded by the air baffles (41); the air inlet of the exhaust fan (42) is matched with the upper cover opening of the exhaust hood (4); the air outlet of the exhaust fan (42) is connected to one end of the exhaust pipe (43); and the other end of the exhaust pipe (43) leads to the outdoors; The cooling mechanism comprises a hollow cooling ring (2) sleeved on the outside of the discharge pipe (11), the bottom end of the cooling ring (2) is provided with a water inlet, the top end of the cooling ring (2) is provided with a water outlet, the water inlet is connected to a cooling water pipeline and cooling water is introduced into the water inlet, and the water outlet is connected to a drainage pipeline and cooling water is discharged after use; The collecting device comprises a supporting platform (33) and a collecting roller (3), the air baffle (41) is vertically arranged on the supporting platform (33), the collecting roller (3) is provided with a U-shaped slide seat (31), two automatic ends of the U-shaped slide seat (31) and the axis of the two ends of the collecting roller (3) are connected with a rotating motor, and a slide rail (32) vertical to the discharge pipe (11) is provided on the supporting platform (33), and the U-shaped slide seat (31) can slide on the slide rail (32); The support platform (33) is penetrated by an air filling pipe (6), and the air filling pipe (6) introduces nitrogen into the exhaust device; A hook (5) is provided at the outlet of the discharge pipe (11), a through hole is penetrated through the air baffle plate (41) directly opposite to the discharge pipe (11), a sealing control sleeve (51) is arranged at one end of the through hole facing the outside of the air baffle plate (41), and a handle end of the hook (5) passes through the through hole and is arranged in the sealing control sleeve (51); A rope ear (52) is provided on the inner side of the air baffle (41) at a position above the through hole, and a rope hole is provided on the hook (5) at a position corresponding to the through hole, and an anti-slip rope (53) is connected between the rope hole and the rope ear (52); The area of ​​the lower hood opening of the exhaust hood (4) is larger than the area of ​​the frame formed by the air baffle plate (41), and the position height of the lower hood opening of the exhaust hood (4) is lower than the height of the top edge of the air baffle plate (41); The surface of the collecting roller (3) is provided with a polytetrafluoroethylene coating.

2. A method for preparing nanomaterials of graphene and carbon nanotubes, characterized in that: The method uses the graphene and carbon nanotube nanomaterial preparation device according to claim 1 for preparation, and comprises the following steps: S1, raising the chemical vapor deposition equipment (1) to a desired temperature; S2, introducing argon gas into the furnace tube (12) of the chemical vapor deposition equipment (1) connected to the discharge pipe (11) in advance, and at the same time introducing nitrogen gas into the exhaust device through the gas charging pipe (6), and turning on the exhaust fan (42) to exhaust gas; S3, using the chemical vapor deposition equipment (1) to inject raw materials into the furnace tube (12), and to introduce argon and hydrogen into the furnace tube (12), while injecting cooling water into the cooling ring (2), and to introduce argon and hydrogen into the furnace tube (12), and blowing the prepared nanomaterial out from the discharge pipe (11); S4, using the pick hook (5) to guide the nanomaterial to adhere to the rolling collection roller (3), and using the collection roller (3) to collect the nanomaterial; S5. After the collection is completed, stop injecting the raw material into the chemical vapor deposition device (1) and stop introducing hydrogen, continue to introduce argon for ten minutes, and stop injecting cooling water into the cooling ring (2); S6. Lower the air baffle (41) in front of the collection system, take out the collection roller (3) that has collected the nanomaterials, and replace it with a new collection roller (3).

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