A system and method for continuous flame synthesis of carbon-based nanomaterials

Abstract

The present invention discloses a system and method for continuous flame synthesis of carbon-based nanomaterials, comprising a flame platform, a catalytic substrate support device, a cooling water supply device and an inert gas / reducing gas supply device; the flame platform is in the shape of an open ring, and a plurality of combustion nozzles are evenly installed on the flame platform, and the inert gas / reducing gas supply device is located at the opening of the flame platform; the catalytic substrate support device comprises a support shaft and a plurality of connecting rods; cooling water channels are provided inside the support shaft, the connecting rods and the catalytic substrate fixing plate; the present invention provides a uniform temperature field for the synthesis process of nanomaterials by setting a flame platform with an annular opening, and flexibly adjusts the distance between the catalytic substrate and the nozzle, and adjusts the rotation speed of the catalytic substrate to adjust the synthesis time of the nanomaterials, thereby providing stable and uniform growth conditions for the large-scale synthesis of nanomaterials, which is conducive to ensuring the consistency of product performance.

Description

Technical Field

[0001] The present invention relates to the technical field of nanomaterials, and in particular to a system and method for continuous flame synthesis of carbon-based nanomaterials. Background Art

[0002] Flame synthesis of nanomaterials is a technique that utilizes flame reactions to synthesize nanoscale materials. This technique has attracted widespread attention due to its high efficiency, rapidity, and affordability, and has shown significant potential for the preparation of metal oxides, metal nanoparticles, and carbon-based materials. The fundamental principle of flame synthesis is to generate ultra-small nanoparticles through a gas combustion reaction within a flame. Through cooling and collection steps, the synthesized nanoparticles can be widely used in a variety of fields, including catalysts, optoelectronic materials, drug delivery, sensors, and composite materials.

[0003] The advantages of flame synthesis of nanomaterials include high efficiency, low cost, tunability, and environmental friendliness. Compared to other synthesis methods (such as chemical vapor deposition (CVD), flame synthesis is fast, enabling the production of nanomaterials in a short time, while also offering low equipment and operating costs. By adjusting parameters such as the flame temperature, flow rate, and composition of the reactant gases, the morphology and properties of the nanomaterials can be effectively tuned. Furthermore, flame synthesis is a simple process, produces minimal waste, and offers favorable environmental characteristics.

[0004] Research has shown that the flame synthesis method for preparing nanomaterials is sensitive to combustion parameters and has high requirements for temperature, equivalence ratio, and mixing conditions. Flame synthesis of nanomaterials faces challenges in particle size control, product purity, process controllability, large-scale production, and material stability. Achieving a more uniform particle size distribution remains a technical challenge, and improving the process to reduce impurities generated during the synthesis is also a pressing task. Further research into the flame synthesis reaction mechanism can improve the controllability of the synthesis process, and further exploration is needed to translate laboratory-scale techniques into industrial production. Summary of the Invention

[0005] In response to the problems existing in the prior art, the present invention provides a system and method for continuous flame synthesis of carbon-based nanomaterials, which can provide a uniform temperature field and concentration field for the synthesis of carbon-based nanomaterials, meet the conditions required for the generation of nanomaterials, and are conducive to promoting the output and standardized production of nanomaterials.

[0006] The technical solutions of the present invention are as follows:

[0007] In a first aspect of the present invention, a system for continuous flame synthesis of carbon-based nanomaterials is provided, comprising a flame platform, a catalytic substrate support device, a cooling water supply device, and an inert gas / reducing gas supply device;

[0008] The flame platform is in the shape of an open ring, and a plurality of combustion nozzles are evenly installed on the flame platform. The inert gas / reducing gas supply device is located at the opening of the annular flame platform;

[0009] The catalytic substrate support device includes a support shaft and a plurality of connecting rods, the support shaft is located on the annular axis of the flame platform, the plurality of connecting rods are vertically mounted on the top of the support shaft, the ends of the connecting rods are mounted with a catalytic substrate fixing plate, the lower surface of the catalytic substrate fixing plate fixes the catalytic substrate so that the catalytic substrate is located above the combustion nozzle and separated by a set distance;

[0010] Cooling water channels are provided inside the support shaft, the connecting rod and the catalytic substrate fixing plate, and the cooling water channels are connected to a cooling water supply device.

[0011] In some embodiments of the present invention, the bottom of the support shaft is fixed on a lifting device, and the lifting device drives the support shaft to rise and fall to adjust the distance between the catalytic substrate and the combustion nozzle. The lifting device is fixed on a rotating table, and the rotating table drives the catalytic substrate to rotate.

[0012] In some embodiments of the present invention, a cooling water inlet channel and a cooling water outlet channel are provided in the support shaft and the connecting rod, the catalytic substrate fixing plate adopts a hollow structure, and a cooling water inlet and a cooling water outlet are provided on the catalytic substrate fixing plate. The cooling water inlet is connected to the cooling water inlet channel, and the cooling water outlet is connected to the cooling water outlet channel.

[0013] In some embodiments of the present invention, the cooling water inlet channel and the cooling water outlet channel inside the support shaft are respectively led out through a cooling water inlet pipe and a cooling water outlet pipe and connected to a cooling water supply device.

[0014] In some embodiments of the present invention, the inert gas / reducing gas supply device includes an inert gas / reducing gas nozzle, and the inert gas / reducing gas nozzle is connected to an inert gas tank or a non-combustible hydrocarbon fuel tank through a pipeline.

[0015] In some embodiments of the present invention, the catalytic substrate fixing plate is fan-shaped, and a groove is provided on the lower surface of the catalytic substrate fixing plate. The shape of the groove matches the shape of the catalytic substrate, and multiple clips are provided on the edge of the groove, and the clips fix the catalytic substrate in the groove.

[0016] In some embodiments of the present invention, the plurality of combustion nozzles are arranged in different combinations on the flame platform and are arranged in multiple layers from the inside to the outside.

[0017] In some embodiments of the present invention, the flame platform, the catalytic substrate supporting device, the cooling water supply device and the inert gas / reducing gas supply device are all fixed on the bottom plate.

[0018] In a second aspect of the present invention, a method for continuous flame synthesis of carbon-based nanomaterials is provided, comprising:

[0019] Adjust the distance between the lower surface of the catalytic substrate fixing plate and the nozzle, and drive the catalytic substrate fixing plate to rotate at a set speed through the support shaft and the connecting rod;

[0020] When the substrate fixing plate rotates to the notch of the flame platform, the catalytic substrate is replaced, and the catalytic substrates of the synthesized nanomaterials are removed in turn, and a new catalytic substrate is installed on the lower surface of the catalytic substrate fixing plate for a new round of synthesis. By adjusting the distance between the catalytic substrate and the flame platform, the temperature window of the nanosynthesized material is within the set flame temperature;

[0021] During the rotation of the catalytic substrate, free carbon atoms grow into nanocrystals on the catalytic substrate. At the same time, cooling water is supplied to the catalytic substrate fixing plate through the cooling water supply device, so that the temperature of the catalytic substrate plate is maintained within a certain range, ensuring that the catalytic substrate is always in a temperature window that is conducive to nanomaterials.

[0022] After the nano material flame synthesis is completed, an inert gas / reducing gas supply device is used to provide an inert atmosphere or a reducing atmosphere.

[0023] In some embodiments of the present invention, the composition of the nozzle inlet is a mixture of hydrocarbon fuel and air, the equivalence ratio during the flame group combustion process is 0.8-2.0, and the distance between the lower surface of the catalytic substrate fixing plate and the nozzle is adjusted according to the change in fuel flow rate, so that the temperature window for nanomaterial synthesis is maintained at 500-800°C.

[0024] One or more technical solutions of the present invention have the following beneficial effects:

[0025] (1) The system for continuous flame synthesis of carbon-based nanomaterials provided by the present invention provides a uniform temperature field and free carbon atom atmosphere for the synthesis process of nanomaterials by setting a flame platform with an annular opening, flexibly adjusts the distance between the catalytic substrate and the nozzle by setting a catalytic substrate support device, and adjusts the synthesis time of nanomaterials by adjusting the rotation speed of the catalytic substrate, thereby providing stable and uniform growth conditions for large-scale synthesis of nanomaterials, which is conducive to ensuring the consistency of product performance; at the same time, during the synthesis process, the cooling water volume is adjusted by the cooling water supply device so that the temperature of the catalytic substrate plate remains unchanged, and an inert gas / reducing gas supply device is set at the opening of the flame platform to provide an inert atmosphere or a reducing atmosphere at the end of the flame synthesis period. The nanomaterial plates are collected and the fresh catalytic substrate is replaced in the opening area, and the next round of synthesis is started to achieve continuous production.

[0026] (2) The flame platform provided by the present invention has combined nozzles evenly arranged on the flame platform. By using the combined nozzle combustion mode, the flame is dispersed and arranged, so that the temperature field is made more uniform in the transverse section direction, and the effective temperature window area is increased, which can realize the large-scale application of the flame synthesis method for preparing nanomaterials; in addition, it can also realize the flexible adjustment of the overall equivalent ratio and the local equivalent ratio, meet the condition requirements for the generation of nanomaterials with different characteristics, and is conducive to promoting the output and standardized production of nanomaterials.

[0027] (3) The catalytic substrate supporting device provided by the present invention realizes the rotation of the catalytic substrate fixing plate under the action of the lifting device and the rotating table, thereby realizing the lifting and rotation of the catalytic substrate, and realizing the adjustment of the distance between the catalytic substrate and the nozzle and the synthesis time. The catalytic substrate fixing plate can realize temporary fixation of the catalytic substrate. The catalytic substrate provides an attachment point and catalyst for the growth of nanomaterials. Considering that the temperature of the catalytic substrate fixing plate changes due to the influence of material, area and thickness, the present invention proposes a catalytic substrate fixing plate with water temperature control, which controls the temperature of the metal substrate to be uniform and stable by changing the water flow rate, thereby improving the output of nanomaterials and the standardization of products.

[0028] (4) The system for continuous flame synthesis of carbon-based nanomaterials provided by the present invention can obtain a larger amount of free carbon atoms by increasing the fuel flow rate when it is necessary to increase the synthesis rate of nanomaterials while ensuring that the composition at the flame group outlet remains unchanged. By coordinating the distance between the catalytic substrate and the flame group, the rotation speed of the catalytic substrate, and the water flow rate of the cooling system of the cooling fixed plate, the parameters of the nanomaterial synthesis temperature window and the synthesis time are optimized to meet the needs of different production efficiencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A front view of a system for continuous flame synthesis of carbon-based nanomaterials according to the present invention;

[0030] Figure 2 A top view of the flame platform of the present invention;

[0031] Figure 3 is a top view of the catalytic substrate support device of the present invention;

[0032] Figure 4 This is a bottom view of the catalytic substrate fixing plate.

[0033] In the figure: 1. Flame platform; 101. Combustion nozzle; 102. Opening; 2. Catalytic substrate supporting device; 201. Support shaft; 2011. Cooling water inlet channel; 2012. Cooling water outlet channel; 202. Connecting rod; 203. Catalytic substrate fixing plate; 2031. Groove; 2032. Buckle; 2033. Cooling water inlet; 2034. Cooling water outlet; 3. Cooling water supply device; 301. Cooling water inlet pipe; 302. Cooling water outlet pipe; 303. Cooling water tank; 304. Water pump; 305. Rotary joint; 4. Inert gas / reducing gas supply device; 401. Inert gas / reducing gas nozzle; 402. Inert gas / fuel gas pipeline; 403. Inert gas tank / hydrocarbon fuel tank; 5. Lifting device; 6. Rotating table; 7. Catalytic substrate; 8. Bottom plate; 9. Support column. DETAILED DESCRIPTION

[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0035] Example 1

[0036] In a typical embodiment of the present invention, a system for continuous flame synthesis of carbon-based nanomaterials is proposed, such as Figures 1-4 As shown, it includes a flame platform 1, a catalytic substrate support device 2, a cooling water supply device 3 and an inert gas / reducing gas supply device 4;

[0037] The flame platform 1 is in an open ring shape, and a plurality of combustion nozzles 101 are evenly installed on the flame platform 1. The inert gas / reducing gas supply device 4 is located at the opening 102 of the flame platform 1;

[0038] The catalytic substrate support device 2 includes a support shaft 201 and a plurality of connecting rods 202. The support shaft 201 is located on the annular axis of the flame platform 1. The plurality of connecting rods 202 are vertically mounted on the top of the support shaft 201. The ends of the connecting rods 202 are mounted with a catalytic substrate fixing plate 203. The lower surface of the catalytic substrate fixing plate 203 fixes the catalytic substrate 7, so that the catalytic substrate 7 is located above the combustion nozzle 101 and separated by a set distance.

[0039] Cooling water channels are provided inside the support shaft 201 , the connecting rod 202 and the catalytic substrate fixing plate 203 , and the cooling water channels are connected to the cooling water supply device 3 .

[0040] like Figure 2 As shown, the flame platform 1 provides a uniform temperature field and a free carbon atom field for the synthesis of nanocatalytic materials. A plurality of combustion nozzles 101 are installed on the flame platform 1. The plurality of combustion nozzles 101 are arranged in different combinations on the flame platform 1, and can be distributed in a ring, square, or diamond shape. In addition, multiple layers of combustion nozzles can be arranged from the inside to the outside as needed. Each nozzle in the flame group is equipped with a different hydrocarbon fuel and air connection inlet. Through the connection method of hydrocarbon fuel and air, the flame group can achieve the transition between premixing and diffusion combustion mode according to the synthesis requirements of different nanomaterials. The relative flow rate of hydrocarbon fuel and air is adjusted to change the equivalence ratio during the flame group combustion process, ranging from 0.8 to 2.0, to meet the atmosphere requirements for the synthesis of different nanomaterials and achieve flexible adjustment of the properties of the nanomaterials.

[0041] The catalytic substrate support device 2 supports the catalytic substrate. The bottom of the support shaft 201 is fixed to the lifting device 5, which drives the support shaft 201 up and down to adjust the distance between the catalytic substrate 7 and the combustion nozzle 101. The lifting device 5 is fixed to the rotating platform 6, which drives the catalytic substrate 7 to rotate. By adjusting the distance between the catalytic substrate 7 and the combustion nozzle 101 within a range of 50-100 mm, the nanomaterial synthesis temperature can be stabilized between 500-800°C. By adjusting the rotation speed of the catalyst material, the residence time of the catalytic substrate in the flame zone, i.e., the nanomaterial synthesis time, can be adjusted, ranging from a dozen seconds to several minutes.

[0042] In this embodiment, the support shaft 201 and the connecting rod 202 are each provided with a cooling water inlet channel 2011 and a cooling water outlet channel 2012. The catalytic substrate fixing plate 203 is hollow and provided with a cooling water inlet 2033 and a cooling water outlet 2034. The cooling water inlet is connected to the cooling water inlet channel, and the cooling water outlet is connected to the cooling water outlet channel. Furthermore, the cooling water inlet and cooling water outlet channels within the support shaft 201 are respectively led out through a cooling water inlet pipe 301 and a cooling water outlet pipe 302, and are connected to the cooling water supply device 3. Specifically, the cooling water inlet pipe 301 and the cooling water outlet pipe 302 pass through the lifting device 5 and the rotating platform 6 and are then led out through a rotating joint 305 to prevent the rotation of the rotating platform from affecting the water pipes. The lifting device 5 and the rotating platform 6 both adopt existing structures.

[0043] The cooling water supply device 3 includes a cooling water tank 303, a cooling water inlet pipe 301 connected to a cooling water outlet pipe 302, and a water pump 304 providing power for delivery. This cooling water supply device allows the temperature of the catalytic substrate 7 to be maintained within a fixed range by adjusting the cooling water flow at varying flame thermal powers and synthesis heights, thereby ensuring efficient nanomaterial synthesis and product consistency.

[0044] In this embodiment, the inert gas / reducing gas supply device 4 includes an inert gas / reducing gas nozzle 401, which is connected to an inert gas tank / hydrocarbon fuel tank 403 via an inert gas / fuel gas pipeline 402. The inert gas / reducing gas supply device 4 provides an inert or reducing atmosphere during the final flame synthesis phase to prevent oxidation of the generated nanomaterials during the cooling process. The inert gas may be nitrogen, argon, or the like. The non-combustible hydrocarbon fuel may be, for example, a C2-C8 alkane or alcohol.

[0045] like Figure 3 and Figure 4 As shown, the catalytic substrate fixing plate 203 is fan-shaped and made of a metal with high thermal conductivity, such as copper or aluminum, to ensure high heat exchange efficiency within the cooling system within the fixing plate, as well as between the fixing plate and the catalytic substrate. A groove 2031 is provided on the lower surface of the catalytic substrate fixing plate 203. The shape of the groove 2031 matches that of the catalytic substrate 7. Multiple clips 2032 are positioned along the edges of the groove 2031 to secure the catalytic substrate 7 within the groove 2031.

[0046] In this embodiment, the catalytic substrate 7 can be made of catalytic materials such as Ni-based, Fe-based, and Cu-based. The catalytic substrate 7 provides attachment points and catalysts for the growth of nanomaterials. The hydrocarbon fuel flame contains a large number of free carbon atoms. When the temperature and atmosphere meet the conditions, the free carbon atoms precipitate and grow on the surface of the nanocrystals on the surface of the catalytic substrate. When it grows to a certain thickness, increasing the residence time in the flame does not increase the output. It is necessary to provide it with a new catalytic substrate growth point, that is, the catalytic substrate needs to be replaced after the nanocrystals grow to a certain thickness.

[0047] In this embodiment, the flame platform 1, the catalytic substrate support device 2, the cooling water supply device 3 and the inert gas / reducing gas supply device 4 are all fixed on the base plate 8. The flame platform 1 is supported on the base plate 8 by support columns 9, and the base plate 8 provides support for each device.

[0048] The working principle of the system for continuous flame synthesis of carbon-based nanomaterials provided in this embodiment is as follows:

[0049] The flame platform utilizes a clustered combustion system to provide a uniform temperature field and adjustable atmosphere for nanomaterial synthesis. The number of clusters can be adjusted based on production scale to accommodate varying synthesis areas. Organizing combustion in a clustered system achieves a horizontally uniform temperature and concentration field, providing stable and uniform growth conditions for large-scale nanomaterial synthesis and ensuring consistent product performance. A catalytic substrate is positioned above the clustered flames. The number of catalytic substrates is adjustable based on production scale and the size of the clustered flames. Increasing fuel flow increases the flame height, and the height of the catalytic substrate relative to the clustered flames ensures a consistent temperature window of 500-800°C for nanomaterial synthesis. Each nozzle in the clustered flames is equipped with a different connection inlet, enabling the choice of premixed or diffusion combustion mode. By adjusting the inlet composition, the equivalence ratio of the clustered flames can be adjusted to meet the specific atmosphere requirements for nanomaterial synthesis. Complex nozzle structures can be fabricated using 3D printing. Cooling water flow is provided on the substrate mounting plate to maintain a constant temperature for the catalytic substrate plate, even at varying flame thermal powers and synthesis heights. At the annular opening of the flame group, a non-burning hydrocarbon fuel flow is set to provide a reducing atmosphere at the end of the flame synthesis. At the same time, the nanomaterial plates are collected and the fresh catalytic substrate is replaced at the opening position to start the next round of synthesis and realize continuous production.

[0050] Example 2

[0051] In a typical embodiment of the present invention, a method for continuous flame synthesis of carbon-based nanomaterials is provided, comprising:

[0052] Adjust the distance between the lower surface of the catalytic substrate fixing plate and the nozzle, and drive the catalytic substrate fixing plate to rotate at a set speed through the support shaft and the connecting rod;

[0053] When the substrate fixing plate rotates to the notch of the flame platform, the catalytic substrate is replaced, and the catalytic substrates of the synthesized nanomaterials are removed in turn, and a new catalytic substrate is installed on the lower surface of the catalytic substrate fixing plate for a new round of synthesis. By adjusting the distance between the catalytic substrate and the flame platform, the temperature window of the nanosynthesized material is within the set flame temperature;

[0054] During the rotation of the catalytic substrate, free carbon atoms grow into nanocrystals on the catalytic substrate. At the same time, cooling water is supplied to the catalytic substrate fixing plate through the cooling water supply device, so that the temperature of the catalytic substrate plate is maintained within a certain range, ensuring that the catalytic substrate is always in a temperature window that is conducive to nanomaterials.

[0055] After the nano material flame synthesis is completed, an inert gas / reducing gas supply device is used to provide an inert atmosphere or a reducing atmosphere.

[0056] Furthermore, the composition of the nozzle inlet is a mixture of hydrocarbon fuel and air, the equivalence ratio during the flame group combustion process is 0.8-2.0, and the distance between the lower surface of the catalytic substrate fixing plate and the nozzle is adjusted according to the change of fuel flow rate, so that the temperature window for nanomaterial synthesis is maintained at 500-800°C; for example, when synthesizing carbon nanotubes, the catalytic substrate is located in the top area of ​​the flame, and the distance between the lower surface of the catalytic substrate fixing plate and the nozzle is 50-100mm; when synthesizing graphene, the catalytic substrate is located in the core area of ​​the flame, and the distance between the lower surface of the catalytic substrate fixing plate and the nozzle is less than 20mm.

[0057] The method that the present embodiment provides can be by flame synthetic carbon-based nano material, as carbon nanotube, Graphene etc., contain a large amount of free carbon atoms in the hydrocarbon fuel flame, when temperature and atmosphere satisfy the condition, free carbon atoms are at catalytic substrate, as nanocrystal surfaces such as Ni base, Fe base, Cu base separate out growth, after it grows to certain thickness, increase the residence time in flame and can not make output increase, need provide new catalytic substrate growing point for it, provide new nano material growing point by changing catalytic substrate.After flame synthetic finishes, by creating inert atmosphere or reducing atmosphere, to prevent the nano material that generates from being oxidized in cooling process.Realize the continuous production that nano material flame is synthetic, both can guarantee that fresh nanocrystal surface is arranged in the synthetic initial stage, can also provide inert atmosphere or reducing atmosphere when finishing.

[0058] Although the above describes the specific embodiments of the present invention in conjunction with the accompanying drawings, it is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art on the basis of the technical solution of the present invention without any creative work are still within the scope of protection of the present invention.

Claims

1. A system for continuous flame synthesis of carbon-based nanomaterials, characterized in that: It includes a flame platform, a catalytic substrate support device, a cooling water supply device and an inert gas / reducing gas supply device; The flame platform is in the shape of an open ring, and a plurality of combustion nozzles are evenly installed on the flame platform. The inert gas / reducing gas supply device is located at the opening of the annular flame platform; The catalytic substrate support device includes a support shaft and a plurality of connecting rods, wherein the support shaft is located on the axis of the flame platform, the plurality of connecting rods are vertically mounted on the top of the support shaft, and a catalytic substrate fixing plate is mounted on the end of the connecting rod. The catalytic substrate is fixed to the lower surface of the catalytic substrate fixing plate so that the catalytic substrate is located above the combustion nozzle and separated by a set distance; The support shaft, the connecting rod and the catalytic substrate fixing plate are provided with cooling water channels inside, and the cooling water channels are connected to the cooling water supply device; The bottom of the support shaft is fixed on a lifting device, and the lifting device drives the support shaft to move up and down to adjust the distance between the catalytic substrate and the combustion nozzle. The lifting device is fixed on a rotating table, and the rotating table drives the catalytic substrate to rotate; The support shaft and the connecting rod are both provided with a cooling water inlet channel and a cooling water outlet channel. The catalytic substrate fixing plate adopts a hollow structure and is provided with a cooling water inlet and a cooling water outlet on the catalytic substrate fixing plate. The cooling water inlet is connected to the cooling water inlet channel, and the cooling water outlet is connected to the cooling water outlet channel. The inert gas / reducing gas supply device comprises an inert gas / reducing gas nozzle, and the inert gas / reducing gas nozzle is connected to an inert gas tank or a non-combustible hydrocarbon fuel tank through a pipeline.

2. The system for continuous flame synthesis of carbon-based nanomaterials according to claim 1, characterized in that: The cooling water inlet channel and the cooling water outlet channel inside the support shaft are respectively led out through a cooling water inlet pipe and a cooling water outlet pipe and are connected to a cooling water supply device.

3. The system for continuous flame synthesis of carbon-based nanomaterials according to claim 1, characterized in that: The catalytic substrate fixing plate is fan-shaped, and a groove is provided on the lower surface of the catalytic substrate fixing plate. The shape of the groove matches the shape of the catalytic substrate. Multiple clips are provided on the edge of the groove, and the clips fix the catalytic substrate in the groove.

4. The system for continuous flame synthesis of carbon-based nanomaterials according to claim 1, characterized in that: The plurality of combustion nozzles are arranged in different combinations on the flame platform and are arranged in multiple layers from the inside to the outside.

5. The system for continuous flame synthesis of carbon-based nanomaterials according to claim 1, characterized in that: The flame platform, the catalytic substrate supporting device, the cooling water supply device and the inert gas / reducing gas supply device are all fixed on the bottom plate.

6. A method for continuous flame synthesis of carbon-based nanomaterials, using the system according to any one of claims 1 to 5, characterized in that: include: Adjust the distance between the lower surface of the catalytic substrate fixing plate and the nozzle, and drive the catalytic substrate fixing plate to rotate at a set speed through the support shaft and the connecting rod; When the substrate fixing plate rotates to the notch of the flame platform, the catalytic substrate is replaced, and the catalytic substrates of the synthesized nanomaterials are removed in turn, and a new catalytic substrate is installed on the lower surface of the catalytic substrate fixing plate for a new round of synthesis. By adjusting the distance between the catalytic substrate and the flame platform, the temperature window of the nanosynthesized material is within the set flame temperature; During the rotation of the catalytic substrate, free carbon atoms grow into nanocrystals on the catalytic substrate. At the same time, cooling water is supplied to the catalytic substrate fixing plate through the cooling water supply device, so that the temperature of the catalytic substrate plate is maintained within a certain range, ensuring that the catalytic substrate is always in a temperature window that is conducive to the growth of nanomaterials. After the nano material flame synthesis is completed, an inert gas / reducing gas supply device is used to provide an inert atmosphere or a reducing atmosphere.

7. The method for continuous flame synthesis of carbon-based nanomaterials according to claim 6, wherein: The inlet composition of the combustion nozzle is a mixture of hydrocarbon fuel and air. The equivalence ratio during the flame group combustion process is 0.8-2.

0. The distance between the lower surface of the catalytic substrate fixing plate and the combustion nozzle is adjusted according to the change of fuel flow rate, so that the temperature window for nanomaterial synthesis is maintained at 500-800℃.

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