A suspension combustion system for micro / nano particle fuels

Abstract

The present invention relates to a suspension combustion system for micro / nano particle fuels. The outlet of a high-pressure gas cylinder of the present invention is equipped with a branch pipe, and air vent valves are installed at both outlets of the branch pipe. One outlet of the branch pipe is sequentially connected to a pressure reducing valve, a flow meter, and a feeding component through a gas conduit, and the outlet of the feeding component is connected to the inlet of a combustion chamber through a pipeline; the other outlet of the branch pipe is sequentially connected to a check valve and a globe valve and then connected to the intake end of the combustion chamber, and a safety valve is arranged through a pipeline at the outlet of the combustion chamber. A pair of laser suspension objectives are symmetrically placed outside a pair of opposite optical windows of the combustion chamber, a high-speed camera and lighting equipment are symmetrically placed outside another pair of opposite optical windows of the combustion chamber, and a pair of expansion mechanisms for injecting ignition lasers are oppositely arranged at the diagonal positions of the combustion chamber. The present invention provides a suitable suspension combustion environment for the ignition of micro / nano particle fuels under different atmospheres and pressures, and collects the combustion products of the micro / nano particle fuels, facilitating subsequent research.

Description

Technical Field

[0001] The present invention belongs to the technical field of micro / nano particle combustion, and relates to a suspension combustion system for micro / nano particle fuels. Background Art

[0002] The combustion of particulate fuels is a complex physico-chemical process. To deeply understand its ignition and combustion mechanisms, it is necessary to measure the ignition and combustion characteristics of particulate fuels, such as the ignition threshold, ignition delay time, combustion time, flame radiation, combustion products, etc. The particle size range of particulate fuels covers the micron and nanometer scales. When the scale is continuously reduced, microscopic methods need to be used for exploration and research.

[0003] In terms of micro-manipulation, there are already technologies such as atomic force microscopes, scanning probes, micro-manipulators, and suspension manipulation. For the combustion of single particulate fuels or fuel particle clusters, it is recommended to use the suspension combustion method for combustion testing and diagnosis. That is, the particulate fuel is stably suspended by the laser suspension (optical tweezers) method, and then the fuel particles are ignited by ignition methods such as lasers, arc discharges, and hot air, and then a variety of combustion detection methods are combined to detect the combustion characteristics. For example, a high-speed camera is used to obtain image and video information, a spectrometer is used to obtain the flame radiation spectrum information, and a colorimetric pyrometer is used to obtain the combustion temperature information.

[0004] The stable capture and precise control of particulate fuels are the basis for the analysis of ignition and combustion characteristics. An optical tweezer is a microscopic manipulation instrument that uses the attractive or repulsive force generated by a highly focused laser beam acting on a tiny target (usually in the micron or nanometer range) to capture and move the target. Compared with mechanical tweezers, its advantage is that it can perform non-contact and non-invasive operations on the target, avoiding mechanical damage to the target. Optical tweezers are not limited to capturing transparent particles, but can capture particles with light absorption.

[0005] Although optical tweezers can already capture micro / nano particles in the air, due to the influence of environmental conditions, the particles will jitter in the air flow. Using a symmetric double-light path design can ensure the balanced force on the particles, and placing them in a suspension chamber to reduce the interference of air disturbance can ensure that the fuel particles are stably suspended near the center position of the symmetric light beam, ensuring precise ignition of them.

[0006] Therefore, it is necessary to design a suspension combustion system for micro / nano particulate fuels to solve the above technical problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a suspension combustion system for micro / nano particulate fuels, to provide a suitable suspension combustion environment for the ignition of micro / nano particulate fuels under different atmospheres and pressures, and to collect the combustion products of micro / nano particulate fuels for subsequent research.

[0008] The present invention includes a high-pressure gas cylinder, a pressure reducing valve, a flow meter, a feeding member, a check valve, a safety valve, a stop valve, a combustion chamber, a laser levitation objective lens, a high-speed camera, and a lighting device.

[0009] The outlet of the high-pressure gas cylinder is equipped with a branch pipe, and ventilation valves are installed at both outlets of the branch pipe. One outlet of the branch pipe is sequentially connected to the pressure reducing valve, the flow meter, and the feeding member through a conduit, and the outlet of the feeding member is connected to the inlet of the combustion chamber through a pipeline; the other outlet of the branch pipe is sequentially connected to the check valve and the stop valve and then connected to the intake end of the combustion chamber, and a safety valve is arranged through a pipeline at the outlet of the combustion chamber.

[0010] The combustion chamber includes a housing and a cover plate, and the cover plate is fixed to the opening side of the housing; light windows are arranged on all four walls of the housing, and a feeding port is arranged on the cover plate; an intake buffer cavity is arranged between the housing and the cover plate, and an intake cavity and an arc-shaped pipe are arranged in the intake buffer cavity, and the arc-shaped pipe is used to connect the intake cavity and the combustion cavity; the intake port of the intake buffer cavity is opposite to the feeding port on the cover plate.

[0011] The bottom of the housing is provided with an intake port and an outlet of the combustion chamber, and threaded holes for installing a material collection member are also provided.

[0012] A track is fixed to the bottom of the housing, a rack plate is arranged in the track, and the rack plate is movably connected to the track; holes serving as outlets for combustion materials are opened in the middle of the rack plate and the track. During installation, the cover glass on the material collection member is aligned with the hole in the middle of the track.

[0013] The bottom surface of the intake buffer cavity in the housing is located above the top of the light window, the track and the rack plate are located at the bottom of the light window, and the inner cavity of the housing serves as a combustion chamber for micro / nano particle fuel. One end of the arc-shaped pipe is connected to the intake cavity, and the other end of the arc-shaped pipe is located above the intersection of the four light windows in the combustion chamber.

[0014] A feeding channel is arranged in the middle of the feeding member, and a pipe installation hole for installing a material pipe is opened in the middle of the feeding channel; the micro / nano particles to be detected are loaded into the material pipe, and a plug is inserted; the material pipe is installed in the pipe installation hole so that the head of the plug is located in the feeding channel.

[0015] A pair of laser levitation objective lenses are symmetrically placed outside a pair of opposite light windows of the combustion chamber, a high-speed camera and a lighting device are symmetrically placed outside the other pair of opposite light windows of the combustion chamber, and a pair of expansion mechanisms for injecting ignition laser are oppositely arranged at the diagonal positions of the combustion chamber. The laser levitation objective lenses, the high-speed camera, the lighting device, and the expansion mechanisms are arranged on the same horizontal plane.

[0016] The cover plate described above is fixed on the opening side of the outer shell through the cooperation of threads and step grooves, and an intake buffer chamber is also fixed on the step groove; a fixed platform matching the step groove is arranged at the top of the intake buffer chamber, and a feed hole corresponding to the position of the feed port on the cover plate is opened on the fixed platform, and the feed hole is also the air inlet of the intake buffer chamber.

[0017] The track described above is fixed on the bottom of the outer shell through screws and columns, and the screws and columns are in threaded connection.

[0018] Teeth are arranged on one side of the rack plate, a gear mounting port corresponding to the position of the track is opened on this side, a gear meshing with the teeth on the rack plate is arranged in the gear mounting port, the gear is connected to a micro motor arranged on the cover plate through a gear rod and a coupling, and the gear is driven by the motor to rotate to control the movement of the rack plate along the track. The micro motor is fixedly arranged on the cover plate through a motor seat and screws.

[0019] The material collection component is cylindrical with a circular cover glass mounting groove arranged at the top, threads are arranged on the side wall of the material collection component, and it is detachably installed with the threaded hole at the bottom of the outer shell through the threads. An opening is made on the side of the top of the upper section of the material collection component, and a cover glass is inserted through the slot hole on the cylindrical surface.

[0020] The light window described above is fixedly arranged on the four walls of the outer shell through a flange and a sealing ring, a sealing ring is arranged between the fixed platform and the step groove, and a sealing ring is arranged at the connection between the material collection component and the outer shell.

[0021] The upper section of the plug is a hemisphere, there is a cylindrical hole penetrating the entire plug at the top of the hemisphere, and the lower section is a cylinder with a diameter slightly smaller than the hemisphere.

[0022] The material pipe is fixed on the material pipe installation hole through the cooperation of a stepped hole and a screw, and a sealing ring is arranged at the connection between the material pipe and the material pipe installation hole.

[0023] One end of each expansion mechanism described above is connected to the side wall of the combustion chamber through threads, and a light-transmitting lens is arranged at the other end of each expansion mechanism. The light-transmitting lens is hermetically arranged on the expansion mechanism through a slot hole, a sealing ring, a flange and a connecting screw.

[0024] The present invention has the following beneficial effects:

[0025] 1. Integration: The present invention integrates functions such as feeding, particle suspension, particle ignition, suspension ignition image shooting, and product collection, and can complete the whole process of measuring the suspension ignition characteristics of micro / nano particle fuels.

[0026] 2. Universality: According to the focal length of the micro / nano particle fuel suspension, by changing the size of the device while keeping the structure unchanged, the suspension ignition of micro / nano particle fuels made of various different materials can be completed.

[0027] 3. Adaptability: The present invention is equipped with a gas cylinder and a seal, which can be adapted to complete the suspension ignition of micro / nano-particle fuels of various materials under different atmospheres and different pressure conditions.

[0028] The present invention provides a brand-new device for micro / nano-particle suspension and ignition experiments. To a certain extent, it makes up for the blank in the design of combustion chambers in this field and provides practical guiding significance for the research and development design of micro / nano-particle suspension combustion system devices; the provided micro / nano-particle fuel suspension combustion system can not only realize the suspension and ignition observation of micro / nano particles, is easy to implement, has excellent universality, and is convenient for popularization and application; the design process of this device is easy to understand, has less processing obstacles, and is convenient for assembly. For the market, it has good engineering application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 is Figure 1 a schematic diagram of the external structure of the combustion chamber in

[0031] Figure 3 is Figure 1 a front view sectional view of the internal structure of the combustion chamber in

[0032] Figure 4 is Figure 1 a top view sectional view of the internal structure of the combustion chamber in

[0033] Figure 5 is a schematic diagram of the structure of the material collection component in the embodiment;

[0034] Figure 6 is Figure 1 a sectional view of the overall structure of the feeding component in

[0035] Figure 7 is Figure 1 a position relationship diagram of the combustion chamber, laser suspension objective lens, high-speed camera and lighting equipment in

[0036] Figure 8 is a sectional view of the external expansion mechanism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The present invention will be further described below with reference to the accompanying drawings.

[0038] As shown in Figure 1As shown in the figure, a suspension combustion system for micro / nano particle fuels includes a high-pressure gas cylinder 1, a pressure reducing valve 2, a flow meter 3, a feeding component 4, a check valve 5, a safety valve 6, a stop valve 7, a combustion chamber 8, a laser suspension objective lens 9, a high-speed camera 10, and a lighting device 11. When in use, the above components are all fixed on an optical platform.

[0039] The outlet of the high-pressure gas cylinder 1 is equipped with a branch pipe, and ventilation valves are installed at both outlets of the branch pipe. One outlet of the branch pipe 1 is sequentially connected to the pressure reducing valve 2, the flow meter 3, and the feeding component 4 through a gas guide pipe, and the outlet of the feeding component 4 is connected to the inlet of the combustion chamber (for conveying the carrier gas) through a pipeline; the other outlet of the branch pipe 1 is sequentially connected to the check valve 5, the stop valve 7, and then to the inlet end of the combustion chamber 8, and a safety valve 6 is arranged through a pipeline at the outlet of the combustion chamber.

[0040] As Figure 2 and 3 shown in the figure, the combustion chamber 8 includes a housing 16 and a cover plate 13. Light windows are arranged on all four walls of the housing 16. The top of the housing 16 is open, and a stepped groove is arranged on the opening side; a feeding port, which is a hollow circular pipe in this embodiment, is arranged on the cover plate 13; in this embodiment, the housing 16 is a cube, and the light windows are circular windows. The cover plate 13 is fixedly provided with a micro motor 14 through a motor base 15 and screws.

[0041] In this embodiment, the cover plate 13 is fixed to the opening side of the housing 16 through the cooperation of threads and the stepped groove, and an intake buffer chamber 17 is also fixed on the stepped groove; a fixed platform matching the stepped groove is arranged at the top of the intake buffer chamber 17, and an intake chamber and an arc-shaped pipe are arranged in the intake buffer chamber 17, and the arc-shaped pipe is used to connect the intake chamber and the combustion chamber; a feeding hole corresponding to the feeding port on the cover plate is opened on the fixed platform, and the feeding hole is also the intake port of the intake buffer chamber.

[0042] An intake port and an outlet port of the combustion chamber are opened at the bottom of the housing 16, and threaded holes for installing the material collection component 20 are also provided.

[0043] A track 21 is fixed to the bottom of the housing 16 through screws and columns, and the screws and columns are threadedly connected; a rack plate 19 is arranged in the track 21. As Figure 4 shown in the figure, the rack plate 19 is movably connected to the track 21 through a groove, and the rack plate 19 can move along the track 21; teeth are arranged on one side of the rack plate 19, a gear installation opening corresponding to the position of the track 21 is opened on this side, and a gear meshing with the teeth on the rack plate 19 is arranged in the gear installation opening. The gear is connected to the micro motor 14 arranged on the cover plate 13 through a gear rod 18 and a coupling. By driving the gear to rotate through the motor, the movement of the rack plate 19 along the track 21 is controlled. Holes serving as the outlet of the combustion material are opened in the middle of both the rack plate 19 and the track 21.

[0044] As Figure 5As shown, the material collection component 20 is cylindrical with a circular cover glass mounting groove at the top. Threads are provided on the side wall of the material collection component 20, and it is detachably installed with the threaded hole at the bottom of the outer shell 16 through the threads. During installation, the cover glass on the material collection component 20 is aligned with the opening in the middle of the track 21.

[0045] In this embodiment, a slot is provided on the side of the top opening of the upper section of the material collection component 20. The cover glass is inserted through the slot on the cylindrical surface. The combustion products can directly fall on the cover glass through the circular hole at the top. A sealing ring is provided at the connection between the material collection component 20 and the outer shell 16 to ensure the airtightness after assembly; the middle cylindrical surface is an external threaded surface, which is fixedly matched with the threaded hole at the bottom of the outer shell 16; the lower section has internal threads, which are fixedly matched with the stud on the optical platform.

[0046] During combustion (before the ignition laser is turned on), the rack plate 19 is controlled to move along the track by a micro motor, so that the opening in the middle of the rack plate 19 is staggered from the opening in the middle of the track 21; after combustion (after ignition is completed), the rack plate 19 is controlled to move along the track by a micro motor, so that the opening in the middle of the rack plate 19 is aligned with the opening in the middle of the track 21. At this time, the laser is turned off, and the combustion products fall and land on the cover glass on the material collection component 20 through the combustion material outlet, achieving the purpose of product collection.

[0047] The bottom surface of the intake buffer cavity 17 in the outer shell 16 is located at the top of the optical window. The track 21 and the rack plate 19 are located at the bottom of the optical window. The inner cavity of the outer shell 16 serves as the combustion cavity for the micro / nano particle fuel. The intersection of the four optical windows is the optimal position for the suspension ignition and combustion of the micro / nano particle fuel.

[0048] One end of the arc-shaped tube is connected to the intake cavity, and the other end of the arc-shaped tube is located above the intersection of the four optical windows in the combustion cavity.

[0049] The optical windows are fixedly arranged on the four walls of the outer shell 16 through flange plates and sealing rings. A sealing ring is provided between the fixed platform and the stepped groove, so that the combustion cavity is in a sealed state.

[0050] As Figure 6 As shown, a feed channel is provided in the middle of the feed component 4, and a feed pipe installation hole for installing the feed pipe 23 is provided in the middle of the feed channel. The micro / nano particles to be detected are loaded into the feed pipe 23, and the plug 22 is inserted; the feed pipe 23 is installed in the feed pipe installation hole, so that the head of the plug 22 is located in the feed channel.

[0051] The upper part of the plug 22 is a hemispherical body, with a cylindrical hole running through the entire plug at the top of the hemispherical body, and the lower part is a cylinder with a diameter slightly smaller than that of the hemisphere. During assembly, the cylinder of this section and the material tube 23 are installed with an interference fit. First, micro / nano particles are poured into the material tube 23, and then the plug 22 is installed. The assembled material tube is inserted into the material tube installation hole, with the end of the material tube equipped with the plug located in the feed channel, and the other end of the material tube is fixed to the feed member 4 by cooperating with a stepped hole with a hexahedron cross-section and a screw. A sealing ring is provided at the connection between the material tube and the material tube installation hole.

[0052] When the air flow passes through the plug 22, the flow rate increases. Affected by the decrease in the pressure on the surface of the plug, the micro / nano particles float into the feed channel from the thin pipe of the plug 22.

[0053] As Figure 7 shown, the suspension objective lenses 9 are symmetrically placed outside the light windows on the larger and opposite sides of the combustion chamber 8, the high-speed camera 10 and the lighting device 11 are symmetrically placed outside the light windows on the smaller and opposite sides of the combustion chamber 8, and a pair of expansion mechanisms 12 are relatively arranged at the diagonal positions of the combustion chamber. The expansion mechanisms 12 are fixed to the outer shell of the combustion chamber 8 by threads. The lighting device 11 provides parallel light for the high-speed camera 10; the suspension laser captures particles at the center position of the combustion chamber after passing through a pair of laser suspension objective lenses 9; the ignition laser is injected into the combustion chamber through a pair of expansion mechanisms 12 to ignite the captured particles.

[0054] As Figure 8 shown, the upper half of the expansion mechanism 12 has external threads for fitting into the threaded holes on the inclined side of the combustion chamber 8; the bottom surfaces of the lower half are respectively provided with slots for placing the transparent lens, the sealing ring, the flange and the connecting screw; and there is a through cylindrical hole inside. The ignition laser vertically passes through the transparent lens and then enters the interior of the combustion chamber 8 through the through cylindrical hole, and then exits from the expansion mechanism 12 on the other side of the combustion chamber.

[0055] The working process is as follows: A clean cover glass is loaded onto the material collection member 20, and the micro motor 14 is used to control the movement of the rack plate 19 along the track 21 so that the central hole of the rack plate 19 is completely staggered from the central hole of the track 21.

[0056] Turn on the laser. The suspended laser enters through the optical windows at both ends of the combustion chamber 8 via two laser suspension objectives 9 respectively to form an optical tweezer. Open the air vent valve on the side where the high-pressure gas cylinder 1 is connected to the check valve 5. Open the check valve 5, the safety valve 6, and the stop valve 7. After exhausting the air in the combustion chamber, close the air vent valve on this side. Open the air vent valve on the other side of the high-pressure gas cylinder 1. Adjust the pressure reducing valve 2 to control the gas pressure and adjust the flowmeter 3 to control the gas flow. The gas is introduced into the feeding component 4 to blow up the micro / nano particles in the material pipe, so that the gas carries the micro / particles into the feeding port of the combustion chamber 8. After the material-carrying gas passes through the feeding port of the combustion chamber 8 and the air inlet of the intake buffer chamber 17, it is buffered in the intake chamber, and the material-carrying gas enters the arc-shaped pipe connected to the intake chamber at a lower initial velocity, so that the material-carrying gas enters the combustion chamber more smoothly, facilitating the laser to capture micro / nano particles. At the same time, use the high-speed camera 10 to observe the laser suspension situation. If there are particles suspended, immediately close the air vent valve. Open the air vent valve at the end of the gas cylinder 1 close to the check valve 5 and slowly ventilate the combustion chamber 8. After reaching the predetermined pressure, close the air vent valve. Turn on the ignition laser, and the laser enters the combustion chamber through a pair of expansion mechanisms 12 to ignite the micro / nano particles. After the combustion is completed, the micro motor 14 is turned on to drive the rack plate 19 until the round hole on the rack plate 19 is aligned with the opening on the track 21. Turn off the suspended laser, and the combustion products fall due to gravity and finally land on the cover glass of the material collection component 20. Manually open the safety valve 11 to slowly release the pressure. After the combustion chamber returns to normal pressure, remove the material collection component 20, and collect the combustion products with tweezers for inspection.

Claims

1. A suspension combustion system for micro / nano-particle fuels, characterized in that: It includes a high-pressure gas cylinder, a pressure reducing valve, a flow meter, a feeding component, a check valve, a safety valve, a globe valve, a combustion chamber, a laser levitation objective lens, a high-speed camera and a lighting device; The outlet of the high-pressure gas cylinder is equipped with a branch pipe, and ventilation valves are installed at both outlets of the branch pipe; one outlet of the branch pipe is sequentially connected to the pressure reducing valve, the flow meter, and the feeding component through a conduit, and the outlet of the feeding component is connected to the inlet of the combustion chamber through a pipeline; the other outlet of the branch pipe is sequentially connected to the check valve and the globe valve and then connected to the intake end of the combustion chamber, and a safety valve is arranged through a pipeline at the outlet of the combustion chamber; The combustion chamber includes a housing and a cover plate, and the cover plate is fixed on the opening side of the housing; light windows are arranged on all four walls of the housing, and a feeding port is arranged on the cover plate; an intake buffer cavity is arranged between the housing and the cover plate, and an intake cavity and an arc-shaped pipe are arranged in the intake buffer cavity, and the arc-shaped pipe is used to connect the intake cavity and the combustion cavity; the intake port of the intake buffer cavity is opposite to the feeding port on the cover plate; The bottom of the housing is provided with a combustion chamber intake port and a combustion chamber outlet, and a threaded hole for installing a material collection component is also provided; The bottom of the housing is fixed with a track, and a rack plate is arranged in the track, and the rack plate is movably connected to the track; holes serving as combustion material outlets are opened in the middle of the rack plate and the track; during installation, the cover glass on the material collection component is aligned with the hole in the middle of the track; The bottom surface of the intake buffer cavity in the housing is located above the light window, the track and the rack plate are located at the bottom of the light window, and the inner cavity of the housing serves as the combustion chamber for micro / nano particle fuel; One end of the arc-shaped pipe is connected to the intake cavity, and the other end of the arc-shaped pipe is located above the intersection of the four light windows in the combustion chamber; A feeding channel is arranged in the middle of the feeding component, and a pipe installation hole for installing a material pipe is opened in the middle of the feeding channel; the micro / nano particles to be detected are loaded into the material pipe and a plug is inserted; the material pipe is installed in the pipe installation hole so that the head of the plug is located in the feeding channel; A pair of laser levitation objective lenses are symmetrically placed outside a pair of opposite light windows of the combustion chamber, a high-speed camera and a lighting device are symmetrically placed outside the other pair of opposite light windows of the combustion chamber, and a pair of expansion mechanisms for injecting ignition laser are arranged opposite to each other at the diagonal position of the combustion chamber; the laser levitation objective lenses, the high-speed camera, the lighting device and the expansion mechanism are arranged on the same horizontal plane.

2. The suspension combustion system for micro / nano particle fuel according to claim 1, wherein: The cover plate is fixed on the opening side of the housing through the cooperation of threads and a stepped groove, and an intake buffer cavity is also fixed on the stepped groove; a fixed platform matching the stepped groove is arranged at the top of the intake buffer cavity, and a feeding hole corresponding to the position of the feeding port on the cover plate is opened on the fixed platform, and the feeding hole is also the intake port of the intake buffer cavity.

3. The suspension combustion system for micro / nano particle fuel according to claim 1, characterized in that: The track is fixed to the bottom of the housing through screws and columns, and the screws and the columns are threadedly connected.

4. The suspension combustion system for micro / nano particle fuels according to claim 1, characterized in that: Teeth are arranged on one side of the rack plate, a gear installation opening corresponding to the position of the track is opened on this side, a gear meshing with the teeth on the rack plate is arranged in the gear installation opening, and the gear is connected to a micro motor arranged on the cover plate through a gear rod and a coupling, and the rotation of the gear is driven by the motor to control the movement of the rack plate along the track.

5. The suspension combustion system for micro / nano particle fuel according to claim 4, characterized in that: The micro motor is fixed on the cover plate through a motor seat and screws.

6. The suspension combustion system for micro / nano particulate fuel according to claim 1, characterized in that: The described material collection component is cylindrical with a circular cover glass mounting groove at the top, and has threads on the side wall of the material collection component, and is detachably installed through the threads with the threaded hole at the bottom of the housing; there are openings on the side of the top of the upper section of the material collection component, and the cover glass is inserted through the slot holes on the cylindrical surface.

7. The suspension combustion system for micro / nano particle fuel according to claim 1, characterized in that: The described optical window is fixedly arranged on the four walls of the housing through a flange and a sealing ring. A sealing ring is arranged between the fixed platform and the stepped groove, and a sealing ring is arranged at the connection between the material collection component and the housing.

8. The suspension combustion system for micro / nano particle fuel according to claim 1, wherein: The upper section of the described plug is a hemisphere, and there is a cylindrical hole running through the entire plug at the top of the hemisphere, and the lower section is a cylinder with a diameter slightly smaller than the hemisphere.

9. The suspension combustion system for micro / nano particle fuels according to claim 1, wherein: The described material pipe is fixed on the material pipe mounting hole through the cooperation of a stepped hole and a screw, and a sealing ring is arranged at the connection between the material pipe and the material pipe mounting hole.

10. The suspension combustion system for micro / nano particle fuel according to claim 1, characterized in that: One end of each of the described expansion mechanisms is threadedly connected to the side wall of the combustion chamber, and a light-transmitting lens is arranged at the other end of each expansion mechanism. The light-transmitting lens is hermetically arranged on the expansion mechanism through a slot hole, a sealing ring, a flange and a connecting screw.

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