Soot aerosol generating device

Abstract

The utility model relates to a soot aerosol generating device. The device comprises a soot aerosol generating system and a gas supply system. The soot aerosol generating system comprises an oxidizing gas laminar flow cavity, a combustion cavity and a cooling and uniform mixing cavity; the oxidizing gas laminar flow cavity is provided with an oxidizing gas inlet and a fuel gas conveying pipe; a laminar flow plate is arranged at the lower end of the oxidizing gas laminar flow cavity; a plurality of laminar flow holes are formed in the laminar flow plate; the gas outlet end of the fuel gas conveying pipe penetrates through the oxidation gas laminar flow cavity and then extends into the combustion cavity, and a bluff body combustion head is installed at the gas outlet end of the fuel gas conveying pipe. On the basis of diffusion flame combustion processes of organic fuel under different combustion conditions, soot aerosols with different particle sizes and different concentrations can be generated in a wide range, and the generated soot aerosols are stable in physicochemical property and can be applied to multiple fields such as instrument test calibration and combustion characteristic research.

Description

Technical Field

[0001] This utility model relates to the field of atmospheric aerosol monitoring technology, specifically to a carbon smoke aerosol generating device. Background Technology

[0002] Particulate matter pollution in the air affects the health of billions of people worldwide. A review summarizing European data from 2000 to 2012 showed that carbon soot particles emitted by motor vehicles are one of the main causes of particulate matter pollution, with 20% of PM coming from road transport. Therefore, the climate effects and health impacts of carbon soot particles in the air have always been a hot topic of international research.

[0003] Because soot particles directly from vehicle exhaust suffer from unstable and uncontrollable particle size distribution, concentration, and chemical composition, researchers have developed alternative methods to generate stable and controllable soot particles for soot particle characteristic studies and instrument calibration. While existing soot particle generation methods represent a significant improvement over those directly using vehicle exhaust particles, some shortcomings remain. Particles generated by graphite generators based on spark discharge or laser ablation have a significantly different structure from soot particles generated from vehicle exhaust. US Patent document US20150283533 A1 discloses a CAST burner based on the quenching principle; however, the repeatability of the generated particles is slightly poor, and the surface contains more volatile impurities. Chinese Patent document CN 115069178 A discloses a carbon particle generation device with controllable concentration and particle size. This device is also based on the quenching principle of an upright flame; however, the entire device has a complex structure and cannot generate soot particles with larger diameters. Chinese patent document CN 112999989 B discloses a black carbon aerosol generator, which is bulky, poorly portable, and has poor adjustability of the generated soot particle size. Chinese patent CN 103983738 B discloses a low-pressure environment combustion device, which is only for optical study of soot particles and cannot sample and analyze the generated soot particles.

[0004] To address the above problems, a carbon smoke aerosol generator is needed. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a carbon smoke aerosol generating device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A carbon smoke aerosol generating device, the device comprising a carbon smoke aerosol generating system.

[0008] The carbon soot aerosol generation system includes an oxidizing gas laminar flow chamber, a combustion chamber, and a cooling mixing chamber arranged sequentially and connected to each other; the oxidizing gas laminar flow chamber is provided with an oxidizing gas inlet and a fuel gas delivery pipe; a laminar flow plate is provided at the lower end of the oxidizing gas laminar flow chamber; a plurality of laminar flow holes are provided on the laminar flow plate; the outlet end of the fuel gas delivery pipe passes through the oxidizing gas laminar flow chamber and extends into the combustion chamber, and a blunt body burner head is installed at the outlet end of the fuel gas delivery pipe.

[0009] The blunt body burner head includes a burner head body; the burner head body has a first through hole and a plurality of second through holes evenly distributed along the outer periphery of the first through hole; the first through hole is located in the middle of the burner head body and is coaxially arranged with the burner head body; the second through holes are inclined.

[0010] Furthermore, the oxidizing gas laminar flow cavity includes an oxidizing gas laminar flow cavity body and an oxidizing gas laminar flow cavity end cap installed at the upper opening of the oxidizing gas laminar flow cavity body; a fuel gas inlet is installed on the oxidizing gas laminar flow cavity end cap; the inlet end of the fuel gas delivery pipe is installed on the oxidizing gas laminar flow cavity end cap and communicates with the fuel gas inlet.

[0011] Furthermore, the device also includes a gas supply system; the gas supply system includes an oxidizing gas supply source and a fuel gas supply source; the oxidizing gas supply source is connected to the oxidizing gas inlet; the fuel gas supply source is connected to the fuel gas inlet.

[0012] Furthermore, the gas supply system also includes an oxidizing gas flow control unit and a fuel gas flow control unit; the oxidizing gas flow control unit is disposed on the pipeline between the oxidizing gas inlet and the oxidizing gas supply source; the fuel gas flow control unit is disposed on the pipeline between the fuel gas inlet and the fuel gas supply source.

[0013] Furthermore, the combustion chamber is made of quartz tube; a first protective sleeve and a second protective sleeve are respectively provided at the upper and lower ends of the combustion chamber.

[0014] Furthermore, the oxidizing gas laminar flow chamber is installed on the first protective sleeve; the combustion chamber and the cooling mixing chamber are both installed on the second protective sleeve; the second protective sleeve is provided with a channel; the channel is used to connect the combustion chamber and the cooling mixing chamber; the cooling mixing chamber is provided with a sampling port.

[0015] Furthermore, multiple support rods are provided between the first protective sleeve and the second protective sleeve.

[0016] Furthermore, the second protective sleeve is provided with a sheath flow exhaust port.

[0017] Furthermore, the second protective cover is mounted on the tray, and a support foot pad is provided between the tray and the second protective cover.

[0018] Compared with the prior art, the advantages of this utility model are:

[0019] (1) Based on the diffusion flame combustion process of organic fuel under different combustion conditions, this utility model can generate carbon smoke aerosols with different particle sizes and concentrations over a wide range. The generated carbon smoke aerosols have stable physicochemical properties and can be used in multiple fields such as instrument testing and calibration, combustion characteristic research.

[0020] (2) The carbon particle generating device of this utility model can precisely control the flow supply of fuel gas and oxidizing gas through the flow control unit, thereby avoiding the problem of unstable carbon smoke aerosol generation caused by flow fluctuation; moreover, the composition and ratio of fuel gas and oxidizing gas can be adjusted arbitrarily, so as to meet the generation of carbon smoke aerosol with different particle size, concentration and other physicochemical properties.

[0021] (3) The carbon particle generating device of this invention adopts an inverted combustion structure. Under the interaction of downward airflow force and upward thermal buoyancy, the generated carbon soot particles slowly move from the flame root to the flame tip and are discharged from the flame. This effectively prevents flame flickering caused by unidirectional thermal buoyancy and airflow force, thereby significantly improving flame stability and carbon soot particle generation stability. This invention adopts a diffusion flame combustion method, with isolated supply of fuel gas and oxidizing gas, resulting in high safety and easy observation of the flame state.

[0022] (4) The carbon particle generating device of this utility model has a blunt body structure for its combustion head, which causes a portion of the high-temperature airflow to reflux during flame combustion, thus serving as a self-compensating continuous ignition source to stabilize flame combustion, thereby preventing flame flickering and improving particle generation stability. By employing a laminar flow plate, the oxidizing gas flows downwards in a laminar flow state, ensuring high flame stability. The cooling and mixing chamber design allows the volatile substances and water vapor on the surface of the carbon soot particles to be cooled and stabilized, ensuring stable particle size and concentration during sampling and analysis. The sheath flow exhaust port allows excess laminar oxidizing gas to be discharged, effectively preventing flame asymmetry caused by changes in the airflow state at the bottom of the quartz tube combustion chamber. The carbon particle generating device of this utility model features simple ignition operation, high success rate, and a compact, portable design. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the carbon particle generating device in this utility model;

[0024] Figure 2 This is an isometric view of the carbon smoke aerosol generating device of this utility model;

[0025] Figure 3 This is an isometric sectional view of the blunt body combustion head in this utility model;

[0026] Figure 4 This is a diagram showing the combustion flame pattern of the carbon smoke aerosol generator of this utility model under a certain combustion condition;

[0027] Figure 5 This is a particle size distribution diagram of carbon soot particles generated under certain combustion conditions by the carbon soot aerosol generator of this utility model;

[0028] Figure 6 The average result and error band diagram of eight particle size distribution measurements of carbon soot particles generated by the carbon soot aerosol generator in this utility model under the same combustion conditions;

[0029] Figure 7 This is a comparison of electron microscope images of carbon soot particles generated by the carbon soot aerosol generator of this utility model and carbon soot particles emitted from motor vehicle exhaust.

[0030] in:

[0031] 1-1. Fuel gas supply source; 1-2. Oxidizing gas supply source; 1-3. Fuel gas flow control unit; 1-4. Oxidizing gas flow control unit; 1-5. Fuel gas inlet; 1-6. Oxidizing gas inlet; 1-7. Oxidizing gas laminar flow chamber end cap; 1-8. Oxidizing gas laminar flow chamber; 1-9. Fuel gas delivery pipe; 1-10. Porous laminar flow mesh; 1-11. First protective sleeve; 1-12. Combustion chamber; 1-13. Blunt body burner head; 1-14. Support rod; 1-15. Second protective sleeve; 1-16. Sheath flow exhaust port; 1-17. Support foot pad; 1-18. Tray; 1-19. Cooling and mixing chamber; 1-20. Sampling port; 2-1. First through hole; 2-2. Second through hole. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings:

[0033] like Figure 1 and Figure 2 The carbon smoke aerosol generating device shown includes a gas supply system and a carbon smoke aerosol generating system.

[0034] like Figure 1 and Figure 2As shown, the carbon soot aerosol generation system includes an oxidizing gas laminar flow chamber 1-8, a combustion chamber, and a cooling and mixing chamber 1-19 arranged sequentially and connected to each other. The oxidizing gas laminar flow chamber 1-8 is equipped with an oxidizing gas inlet 1-6 and a fuel gas delivery pipe 1-9. The carbon soot aerosol generated by this system is discharged from a sampling port 1-20 at the end of the cooling and mixing chamber 1-19. The laminar flow plate at the bottom of the oxidizing gas laminar flow chamber 1-8 is a porous laminar flow mesh 1-10. The laminar flow plate at the lower end of the oxidizing gas laminar flow chamber 1-8 has multiple laminar flow holes. The dense hole design ensures that the oxidizing gas entering the quartz tube combustion chamber 1-12 is in a laminar flow state, preventing turbulence in the quartz tube combustion chamber 1-12 and thus maintaining a highly stable flame.

[0035] This invention is based on an inverted flame combustion chamber design. By using the inverted flame design, the flickering and instability problem in the traditional forward combustion process is solved. The design of the blunt body combustion head 1-13, the oxidizing gas laminar flow chamber 1-8, and the sheath flow exhaust port 1-16 effectively improves the stability of the combustion flame. Combined with the design of the cooling and mixing chamber 1-19, the problem of changes in particle size and surface properties caused by the rapid condensation of OC and water vapor on the surface of generated soot particles is solved, effectively improving the stability of particle size and concentration.

[0036] In some embodiments, the outlet end of the fuel gas delivery pipe 1-9 passes through the oxidizing gas laminar flow chamber 1-8 and extends into the combustion chamber, and a blunt body burner head 1-13 is installed at the outlet end of the fuel gas delivery pipe 1-9. The design of the blunt body burner head 1-13 causes a portion of the high-temperature gas flow to reflux during flame combustion, thereby acting as a self-compensating continuous ignition source to stabilize flame combustion, preventing flame flickering and improving particle generation stability.

[0037] In some embodiments, the oxidizing gas laminar flow cavity 1-8 includes an oxidizing gas laminar flow cavity body and an oxidizing gas laminar flow cavity end cap 1-7 installed at the upper opening of the oxidizing gas laminar flow cavity body; a fuel gas inlet 1-5 is installed on the oxidizing gas laminar flow cavity end cap 1-7; the inlet end of the fuel gas delivery pipe 1-9 is installed on the oxidizing gas laminar flow cavity end cap 1-7 and communicates with the fuel gas inlet 1-5.

[0038] In some embodiments, the combustion chamber is made of a quartz tube; a first protective sleeve 1-11 and a second protective sleeve 1-15 are respectively provided at the upper and lower ends of the combustion chamber. The end cap 1-7 of the oxidizing gas laminar flow chamber is connected and fixed to the main body of the oxidizing gas laminar flow chamber by screws to form an oxidizing gas laminar flow chamber 1-8, which is detachably installed on the upper end of the first protective sleeve 1-11 by long screws. The combustion chamber made of quartz tube is sandwiched between the first protective sleeve 1-11 and the second protective sleeve 1-15 and is supported and connected by three support rods 1-14. The quartz combustion chamber design facilitates the observation of the flame combustion state; the design of the protective sleeves and support rods 1-14 serves to seal the quartz tube combustion chamber 1-12 and connect and support the first protective sleeve 1-11 and the second protective sleeve 1-15.

[0039] In some embodiments, the oxidizing gas laminar flow chamber 1-8 is mounted on the first protective sleeve 1-11; the combustion chamber and the cooling and mixing chamber 1-19 are both mounted on the second protective sleeve 1-15; the second protective sleeve 1-15 is provided with a channel; the channel is used to connect the combustion chamber and the cooling and mixing chamber 1-19; the cooling and mixing chamber 1-19 is provided with a sampling port 1-20. The cooling and mixing chamber 1-19 is used to cool and stabilize the volatile organic compounds (OCs) and water vapor on the surface of the generated soot particles, preventing changes in particle size and surface properties under unstable conditions, and improving the stability of the generated particles.

[0040] In some embodiments, the second protective sleeve 1-15 is provided with a sheath flow exhaust port 1-16. The design of the sheath flow exhaust port 1-16 can discharge excess laminar oxidation gas and effectively prevent flame asymmetry caused by changes in the airflow state at the bottom of the quartz tube combustion chamber 1-12.

[0041] In some embodiments, the second protective sleeve 1-15 is mounted on a tray 1-18, and a support foot pad 1-17 is provided between the tray 1-18 and the second protective sleeve 1-15. The tray 1-18 and the support foot pad 1-17 are used for heat insulation and support for placing upper components such as the combustion chamber.

[0042] like Figure 1 and Figure 2As shown, the gas supply system includes an oxidizing gas supply source 1-2 and a fuel gas supply source 1-1; the oxidizing gas supply source 1-2 is connected to the oxidizing gas inlet 1-6; the fuel gas supply source 1-1 is connected to the fuel gas inlet 1-5. The gas supply system also includes an oxidizing gas flow control unit 1-4 and a fuel gas flow control unit 1-3; the oxidizing gas flow control unit 1-4 is disposed on the pipeline between the oxidizing gas inlet 1-6 and the oxidizing gas supply source 1-2; the fuel gas flow control unit 1-3 is disposed on the pipeline between the fuel gas inlet 1-5 and the fuel gas supply source 1-1.

[0043] The fuel gas supply source 1-1 can be a pure combustible gas such as propane or ethylene, or a mixture of combustible gas and non-combustible gas such as nitrogen; the oxidizing gas supply source 1-2 can be clean air or a mixture of oxygen and nitrogen in a certain proportion. By adjusting the ratio of combustible gas to non-combustible gas in the fuel gas and the ratio of clean air or oxygen to nitrogen in the oxidizing gas, the particle size and concentration of generated soot particles can be controlled.

[0044] like Figure 3 As shown, the blunt-body burner head 1-13 includes a burner head body; the burner head body has a first through hole 2-1 and a plurality of second through holes 2-2 evenly distributed along the outer periphery of the first through hole; the first through hole 2-1 is located in the middle of the burner head body and is coaxially arranged with the burner head body; the second through holes 2-2 are inclined. Specifically, the outlet center of the blunt-body burner head 1-13 has an axial first through hole 2-1, and six second through holes 2-2 with a certain angle to the first through hole 2-1 are evenly arranged around the first through hole 2-1. Through this structural design, a low-pressure area is formed at the blunt body outlet, which causes the high-temperature airflow at the flame tip to generate a backflow motion, thereby serving as a continuous ignition source to ignite the fuel gas and preventing flame flickering caused by unstable temperature inside the flame.

[0045] The working method of the above-mentioned carbon smoke aerosol generator is as follows:

[0046] S1. Place the carbon aerosol generator on a horizontal table, away from flammable materials. Loosen and remove the three fixing screws connecting the oxidizing gas laminar flow chamber 1-8 and the first protective sleeve 1-11. Remove the structural components consisting of the fuel gas inlet 1-5, the oxidizing gas inlet 1-6, the oxidizing gas laminar flow chamber end cap 1-7, the oxidizing gas laminar flow chamber 1-8, the fuel gas delivery pipe 1-9, and the blunt body burner head 1-13.

[0047] S2. Adjust and set the fuel gas flow control unit 1-3 and the oxidizing gas flow control unit 1-4 to the target fuel gas flow and oxidizing gas flow, and introduce the fuel gas and oxidizing gas into the two gas paths respectively.

[0048] S3. Hold the structural component and bring the blunt body burner head 1-13 outlet close to the ignition source for ignition.

[0049] S4. After ignition is complete, reset the structural components and install and tighten the three fixing screws that connect the oxidizing gas laminar flow chamber 1-8 and the first protective sleeve 1-11.

[0050] S5, fuel gas and oxidizing gas meet and diffuse combustion at the outlet of the blunt body burner head 1-13 after passing through fuel gas delivery pipe 1-9 and oxidizing gas laminar flow chamber 1-8 respectively, and the combustion flame presents an inverted structure.

[0051] At this point, the formation of soot particles in the flame exhibits a vertical distribution. Specifically, hydrocarbon molecules at the flame root polymerize to form polycyclic aromatic hydrocarbons, progressing to soot monomer particles in the middle of the flame, and finally to soot polymer particles at the flame tip. Due to the inverted flame structure, the generated soot particles slowly move from the flame root to the flame tip under the interaction of downward airflow force and upward thermal buoyancy, forming a particle stagnation plane at the flame tip, which promotes further polymerization and growth of the soot particles.

[0052] The flame stability was observed through the quartz tube combustion chamber 1-12. The laminar flow of oxidizing gas in the quartz tube combustion chamber 1-12 maintained a high degree of flame stability. The design of the blunt body burner head 1-13 caused some of the high-temperature gas flow to reflux during flame combustion, thus acting as a self-compensating continuous ignition source to stabilize flame combustion, preventing flame flickering and improving particle generation stability. The design of the sheath flow exhaust port 1-16 can discharge excess laminar oxidizing gas and effectively prevent flame asymmetry caused by changes in the airflow state at the bottom of the quartz tube combustion chamber 1-12.

[0053] S6. The generated soot particles are carried into the cooling and mixing chamber 1-19 under the action of laminar oxidizing gas. The volatile substances and water vapor on the surface of the soot particles are cooled and stabilized in the cooling and mixing chamber 1-19, so that the particle size and concentration of soot particles remain stable.

[0054] S7. After cooling and stabilization, the carbon soot particles are discharged from sampling ports 1-20 for sampling and analysis.

[0055] like Figure 4 As shown, a photograph of the combustion flame morphology of the above-mentioned carbon smoke aerosol generator under a certain combustion condition was recorded. The specific combustion conditions were: ethylene was selected as the fuel gas, clean air was selected as the oxidizing gas, the flow rate of ethylene was set to 130 mL / min, and the flow rate of clean air was set to 8000 mL / min.

[0056] like Figure 5As shown, the particle size distribution of carbon soot particles generated by the aforementioned carbon soot aerosol generator under several combustion conditions was measured. One selectable combustion condition is presented here: a mixture of ethylene and nitrogen is used as the fuel gas, and clean air is used as the oxidizing gas. The flow rates of ethylene, nitrogen, and clean air are set within the range of 80-170 mL / min, 80-170 mL / min, and 8000-15000 mL / min, respectively. Within this flow range, adjusting the ratios of ethylene, nitrogen, and clean air can generate carbon soot aerosols with peak particle sizes of 61.5-310.6 nm, exhibiting an approximately normal distribution.

[0057] like Figure 6 As shown, the particle size distribution of carbon soot particles generated by the aforementioned carbon soot aerosol generator during continuous operation under the same combustion conditions was measured eight times. The mean and error of all measurement results were calculated, with a 15-minute interval between each measurement. The specific combustion conditions were: ethylene as fuel gas, clean air as oxidant, with an ethylene flow rate of 140 mL / min and a clean air flow rate of 10000 mL / min. The results show that the relative standard deviation of the particle size of the carbon soot aerosol generated by the carbon soot aerosol generator in Example 1 was ≤3.21%, and the relative standard deviation of the concentration was ≤0.91%, indicating that the generator has excellent stability in carbon soot aerosol generation under long-term operation.

[0058] like Figure 7 As shown, electron micrographs of carbon soot particles generated by the aforementioned carbon soot aerosol generator were compared with those of carbon soot particles emitted from motor vehicle exhaust. The left image is a TEM image of carbon soot particles emitted from motor vehicle exhaust, and the right image is a SEM image of carbon soot particles generated by the carbon soot aerosol generator. The results show that the carbon soot particles generated by the carbon soot aerosol generator of this invention have the same polymer structure as the carbon soot particles emitted from motor vehicle exhaust.

[0059] In general, the method for generating soot particles using an inverted flame combustion structure proposed in this invention is a novel soot particle generation scheme, different from existing domestic and international schemes listed in the background art. Although some detailed design features are common technical features, these designs all serve the overall generation scheme and aim to achieve better results, rather than simply piecing together technologies. The working method of the soot aerosol generating device described in this invention provides a detailed description of the soot particle generation process and principle, which is also the innovation of this invention. This invention proposes an inverted flame combustion structure, combined with the design of a blunt combustion head 1-13, an oxidizing gas laminar flow chamber 1-8, a sheath flow exhaust port 1-16, and a cooling mixing chamber 1-19. Compared with traditional soot particle generation methods, this significantly improves the particle size and concentration stability of the generated soot particles, playing an important role in the calibration and verification of equipment for measuring particulate number concentration and particulate mass concentration in motor vehicle exhaust.

[0060] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A carbon soot aerosol generating device, characterized in that, the device comprises a carbon soot aerosol generating system; the carbon soot aerosol generating system comprises an oxidizing gas laminar flow cavity (1-8), a combustion cavity (1-12) and a cooling mixing cavity (1-19) arranged in sequence and in communication; the oxidizing gas laminar flow cavity (1-8) is provided with an oxidizing gas inlet (1-6) and a fuel gas delivery pipe (1-9); the lower end of the oxidizing gas laminar flow cavity (1-8) is provided with a laminar flow plate; a plurality of laminar flow holes are arranged on the laminar flow plate; the gas outlet end of the fuel gas delivery pipe (1-9) extends into the combustion cavity (1-12) after passing through the oxidizing gas laminar flow cavity (1-8), and the gas outlet end of the fuel gas delivery pipe (1-9) is provided with a blunt combustion head (1-13); the blunt combustion head (1-13) comprises a combustion head body; a first through hole (2-1) and a plurality of second through holes (2-2) uniformly distributed along the outer periphery of the first through hole (2-1) are formed on the combustion head body; the first through hole (2-1) is arranged at the middle position of the combustion head body and coaxially arranged with the combustion head body; the second through hole (2-2) is arranged obliquely.

2. The carbon soot aerosol generating device according to claim 1, characterized in that, the oxidizing gas laminar flow cavity (1-8) comprises an oxidizing gas laminar flow cavity body and an oxidizing gas laminar flow cavity end cover (1-7) installed at the opening of the upper end of the oxidizing gas laminar flow cavity body; the oxidizing gas laminar flow cavity end cover (1-7) is provided with a fuel gas inlet (1-5); the gas inlet end of the fuel gas delivery pipe (1-9) is installed on the oxidizing gas laminar flow cavity end cover (1-7) and communicates with the fuel gas inlet (1-5).

3. The carbon soot aerosol generating device according to claim 2, characterized in that, the device further comprises a gas supply system; the gas supply system comprises an oxidizing gas supply source (1-2) and a fuel gas supply source (1-1); the oxidizing gas supply source (1-2) is connected with the oxidizing gas inlet (1-6); the fuel gas supply source (1-1) is connected with the fuel gas inlet (1-5); the gas supply system further comprises an oxidizing gas flow control unit (1-4) and a fuel gas flow control unit (1-3); the oxidizing gas flow control unit (1-4) is arranged on the pipeline between the oxidizing gas inlet (1-6) and the oxidizing gas supply source (1-2); the fuel gas flow control unit (1-3) is arranged on the pipeline between the fuel gas inlet (1-5) and the fuel gas supply source (1-1).

4. The carbon soot aerosol generating device according to claim 1, characterized in that, the combustion cavity (1-12) adopts a quartz tube; the upper and lower ends of the combustion cavity (1-12) are respectively provided with a first protective sleeve (1-11) and a second protective sleeve (1-15).

5. The carbon soot aerosol generating device according to claim 4, characterized in that, the oxidizing gas laminar flow cavity (1-8) is installed on the first protective sleeve (1-11). The combustion cavity (1-12) and the cooling mixing cavity (1-19) are both mounted on the second protective sleeve (1-15); The second protective sleeve (1-15) is provided with a channel; the channel is used for connecting the combustion cavity (1-12) and the cooling mixing cavity (1-19); The cooling mixing cavity (1-19) is provided with a sampling port (1-20).

6. The carbon soot aerosol generating device according to claim 4, wherein A plurality of supporting rods (1-14) are arranged between the first protective sleeve (1-11) and the second protective sleeve (1-15).

7. The carbon soot aerosol generating device according to claim 4, wherein The second protective sleeve (1-15) is provided with a sheath flow exhaust port (1-16).

8. The carbon soot aerosol generating device according to claim 4, wherein The second protective sleeve (1-15) is mounted on a tray (1-18), and a supporting foot pad (1-17) is arranged between the tray (1-18) and the second protective sleeve (1-15).

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