A circular flame super-insulated burner

Abstract

This invention discloses a circular flame super-insulated burner, comprising a shell, with a combustion spray ring connected to the top of the shell, and primary and secondary fuel mechanisms and an ignition rod connected to the bottom of the shell. Several nozzles of the primary fuel mechanism's feed pipe are arranged in a ring within the combustion spray ring, with an upper fan of the blower mechanism at the center of the ring. An air intake mechanism with an adjustable filter is located on one side of the lower fan linked to the upper fan. Several nozzles of the secondary fuel mechanism are arranged in a ring around the outside of the combustion spray ring, and a liftable reaction plate is located above the combustion spray ring. This burner uses a two-stage fuel supply, and the combustion reaction is concentrated around the reaction plate, which has a high specific surface area, enabling super-insulated combustion. The height of the reaction plate can be freely adjusted as needed. The blower mechanism in the burner assists in air intake and combustion and is equipped with an ignition rod for heat supplementation, ensuring stable super-insulated combustion under different conditions.

Description

Technical Field

[0001] This invention relates to the field of burner equipment technology, and specifically to a circular flame super-insulated burner. Background Technology

[0002] Combustion systems in industries such as petrochemicals, metallurgy, and building materials mostly use traditional combustion technologies. These burners employ free-flame combustion, where some of the heat generated is carried out of the furnace by flue gas with poor heat transfer properties, resulting in energy loss. They also cause problems such as uneven temperature distribution, narrow combustion zones, and severe pollutant emissions (high NOx content in flue gas, sometimes reaching 170 ppm). While using low-NOx burners in conjunction with heat exchangers can reduce NOx emissions and recover some waste heat from the flue gas, it leads to an increase in COe emissions, thus failing to fundamentally solve the problem. Controlling pollution by directly reducing flue gas temperature is a feasible solution, primarily achieved through superadiabatic combustion. Superadiabatic combustion refers to using enhanced radiation or heat storage during combustion to maximize heat transfer to the fuel and oxidant upstream of the reaction zone, thereby reducing the heat in the flue gas, enhancing the combustion reaction, ensuring complete fuel combustion, and ultimately reducing pollutant generation. Currently, burners using super adiabatic combustion are still in their early stages. Most have complex structures and lack the functions of regulating and assisting air intake and combustion. Therefore, they are only suitable for a limited range of scenarios. When conditions change, it is difficult to maintain super adiabatic combustion, which ultimately affects the emission results and makes it impossible to stably achieve dual-low emissions and efficient energy utilization. A new type of burner is needed to solve the above problems. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes a circular flame super-insulated burner, comprising a shell, with a combustion spray ring connected to the top of the shell, and a primary and secondary fuel mechanism and an ignition rod connected to the bottom of the shell. Several nozzles of the primary fuel mechanism's feed pipe are arranged in a ring within the combustion spray ring, with an upper fan in the blower mechanism at the center of the ring. An air intake mechanism with an adjustable filter is provided on one side of the lower fan linked to the upper fan. Several nozzles of the secondary fuel mechanism are arranged in a ring outside the combustion spray ring, and a liftable reaction plate is provided above the combustion spray ring.

[0004] Furthermore, the feed pipe of the primary fuel mechanism is inserted into the shell from the center of the bottom surface. The upper end of the feed pipe is provided with two layers of upward-bent branch pipes A. The nozzles of the eight branch pipes are evenly arranged around the inside of the combustion spray ring. The nozzles are fitted with spray orifice sleeves A. The ignition port of the ignition rod is located below one of the spray orifice sleeves A.

[0005] Furthermore, the secondary fuel mechanism includes a feed ring installed below the bottom surface of the casing. The feed ring's input pipe is located on one side of the bottom of the ring. The feed ring's branch pipes B are embedded inside the casing wall. The nozzles of the eight branch pipes B are evenly arranged around the outside of the combustion spray ring, and the nozzles are fitted with spray orifice sleeves B.

[0006] Furthermore, the blower mechanism includes a drive motor, which is installed on the outside of the shell wall. After the output end of the drive motor passes through the shell wall, it meshes with the large gear ring on the outer ring of the lower fan through a gear. The lower end of the inner ring of the lower fan is rotatably connected to the feed pipe body through a bearing. The upper gear ring on the inner ring of the lower fan meshes with the gear at the lower end of the drive shaft. The shaft body of the drive shaft is rotatably connected to the shaft hole at the end of the clamp. The clamp is installed on the feed pipe body. The gear at the upper end of the drive shaft meshes with the lower gear ring on the inner ring of the upper fan. The upper end of the inner ring of the upper fan is rotatably connected to the top shaft of the drive shaft through a bearing.

[0007] Furthermore, the air intake mechanism includes an air intake pipe, which is installed on one side of the casing. The outlet end of the air intake pipe is matched with the lower fan. The inlet end of the air intake pipe is provided with an adjustable louver. The flange at the inlet end is rotatably connected to the ends of several threaded rods A and sliding rods A. The body of the threaded rods A is threadedly connected to the threaded seat of the pipe cover. The other end of the threaded rods A is provided with an adjusting disc A. The body of the sliding rods A is slidably connected to the sliding seat of the pipe cover. The seat of the sliding seat is provided with fastening bolts that can limit the sliding of the sliding rods A. The inner side of the pipe cover and the inlet end of the air intake pipe are provided with mutually matching rubber rings. A foldable filter screen is connected between the two rubber rings.

[0008] Furthermore, the shell is connected to the furnace wall via a shell flange. The inner side of the furnace wall is lined with refractory material. Several threaded seats and slides are arranged around the outer side of the furnace wall around the shell. The threaded seats are threadedly connected to the body of the threaded rod B. The upper end of the threaded rod B passes through the refractory material and is rotatably connected to the transfer pipe. The transfer pipe is connected to the bottom of the reaction plate by fastening bolts. The lower end of the threaded rod B is provided with an adjusting plate B. The slide is slidably connected to the slide rod B. The slide body is provided with fastening bolts that can limit the sliding of the slide rod B. The upper end of the slide rod B is connected to the bottom of the reaction plate by fastening bolts.

[0009] Furthermore, the burner is equipped with a control module, which adjusts the pressure and flow rate of fuel injected by the primary and secondary fuel mechanisms by adjusting the execution module. The primary fuel supply is 20%-30%, and the secondary fuel supply is 70%-80%.

[0010] Furthermore, the combustion spray ring is a hollow cylinder with a sloping outer surface on the top. The top of the sloping surface has a certain porous structure, which can guide the internal fluid to the outside of the cylinder in a specific pattern.

[0011] Furthermore, the diameter of the reaction disk ranges from 100 to 800 mm, and the height ranges from 20 mm to 200 mm. Its surface is a porous medium, and it is formed axially by one of the following: through hole, tapered hole, or stepped hole after machining.

[0012] Furthermore, the matrix material of the reaction disk includes one or more of silicon carbide, silicon nitride, mullite, cordierite, aluminum titanate, alumina, diatomite, zircon, and magnesite.

[0013] The beneficial effects of this invention are as follows:

[0014] The reaction disc in this invention has both a high specific surface area and a high thermal conductivity, resulting in a heat capacity far greater than that of a gas of the same volume. This allows it to absorb more heat, replacing free space and eliminating the need to contain a free flame, thus reducing the boiler's size. It can rapidly conduct the heat released by the combustion reaction and store it in the reaction disc, heating the premixed gas downstream of the reaction zone. This fully utilizes the heat to enhance the combustion reaction, reduces the proportion of heat carried away by the flue gas, and greatly improves the burner's thermal efficiency.

[0015] The combustion spray ring in this invention can enhance the diffusion and heat transfer processes within the gas by disturbing the airflow, allowing the heat released by the fuel to enter the reaction disk more efficiently, thereby reducing the temperature of the reaction zone and the reaction products. At the same time, the high emissivity coexisting with high thermal conductivity makes the temperature in the combustion chamber tend to be uniform, avoiding the formation of local high-temperature zones, and can significantly reduce NOx emissions (less than 20 ppm).

[0016] Compared with traditional burners, this invention features a larger reaction zone, longer reaction time, and more complete combustion, which helps to suppress COe formation. The reaction plate in the invention can be freely adjusted according to actual conditions to achieve stable high-intensity combustion. Since the temperature of the reaction plate is higher than the combustion temperature of the mixed gas, the power density can be increased by increasing the flow rate of the mixed gas through the blower mechanism. The foldable filter screen in the air intake mechanism can be laid out with the pipe cover, which is convenient and compact, suitable for the furnace environment, and also provides clean combustion-supporting gas for the blower mechanism. Attached Figure Description

[0017] Figure 1 This is a front view structural diagram of the present invention;

[0018] Figure 2 This is a front view sectional view of the main body of the present invention;

[0019] Figure 3 This is a sectional view of the main body of the present invention from an oblique angle.

[0020] Figure 4 This is a top view of the main body of the invention.

[0021] Figure 5 This is a bottom view of the main body of the invention.

[0022] Figure 6 This is a schematic diagram of the reaction disk in this invention;

[0023] Figure 7 The pore structure at the top of the combustion spray ring slope is one;

[0024] Figure 8 The second type is the porous structure at the top of the combustion spray ring slope.

[0025] Figure 9 The third type is the porous structure at the top of the combustion spray ring slope.

[0026] The following are the annotations for the attached drawings: 1. Shell; 2. Combustion spray ring; 3. Ignition rod; 4. Feed pipe; 401. Branch pipe A; 5. Upper fan; 6. Lower fan; 601. Large gear ring; 7. Reaction plate; 8. Nozzle sleeve A; 9. Feed ring; 901. Input pipe; 902. Branch pipe B; 10. Nozzle sleeve B; 11. Drive motor; 12. Transmission shaft; 13. Clamp; 14. Air inlet pipe; 15. Adjustable louver; 16. Threaded rod A; 17. Slide rod A; 18. Pipe cover; 19. Adjusting disc A; 20. Rubber ring; 21. Foldable filter screen; 22. Furnace wall; 23. Refractory material; 24. Threaded rod B; 25. Transfer pipe; 26. Adjusting disc B; 27. Slide rod B. Detailed Implementation

[0027] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] The present invention will be further described below with reference to the accompanying drawings:

[0030] like Figures 1 to 6As shown, a circular flame super-insulated burner includes a shell 1, with a combustion spray ring 2 connected to the top of the shell 1. The combustion spray ring 2 is a hollow cylinder with a sloping outer surface at the top. The top of the sloping surface has a certain porous structure (e.g., Figures 7 to 9 As shown), the porous structure can guide the internal fluid to the outside of the cylinder in a specific pattern. The bottom surface of the shell 1 is connected to the primary and secondary fuel mechanisms and the ignition rod 3. Several nozzles of the primary fuel mechanism feed pipe 4 are distributed in a ring inside the combustion spray ring 2. The center of the ring is the upper fan 5 of the blower mechanism. The lower fan 6 linked to the upper fan 5 is provided with an air intake mechanism with an adjustable filter on one side. Several nozzles of the secondary fuel mechanism are arranged in a ring outside the combustion spray ring 2. The control module in the burner adjusts the pressure and flow rate of the fuel injected by the primary and secondary fuel mechanisms through the adjustment execution module. The primary fuel supply is 20%-30%, and the secondary fuel supply is 70%-80%.

[0031] In this embodiment, the shell 1 is connected to the furnace wall 22 via a shell flange. The inner side of the furnace wall 22 is lined with refractory material 23. The outer side of the furnace wall 22 is surrounded by a plurality of threaded seats and slides. The threaded seats are threadedly connected to the body of the threaded rod B24. The upper end of the threaded rod B24 passes through the refractory material 23 and is rotatably connected to the adapter pipe 25. The adapter pipe 25 is connected to the bottom of the reaction plate 7 by fastening bolts. The lower end of the threaded rod B24 is provided with an adjusting plate B26. The slide is slidably connected to the slide rod B27. The body of the slide is provided with fastening bolts that can limit the sliding of the slide rod B27. The upper end of the slide rod B27 is connected to the bottom of the reaction plate 7 by fastening bolts. The reaction plate 7 is located above the combustion spray ring 2. When the fastening bolts on the slide are loosened, the adjusting plate B26 can be rotated to raise or lower the reaction plate 7. The diameter of the reaction disk 7 ranges from 100 to 800 mm, and the height ranges from 20 mm to 200 mm. To increase the specific surface area of ​​the reaction disk 7, its surface is a porous medium or has several axial small holes (through holes, conical holes, stepped holes, etc.) machined by mechanical processing. The matrix material of the reaction disk 7 can be silicon carbide, silicon nitride, mullite, cordierite, aluminum titanate, alumina, diatomite, zircon, magnesite, etc. These materials have advantages such as high thermal conductivity, thermal shock resistance, light weight, high strength, excellent thermal shock resistance and excellent processing performance, and can withstand the thermal stress caused by frequent start-up and temperature gradient.

[0032] In this embodiment, the feed pipe 4 of the primary fuel mechanism is inserted into the shell 1 from the center of the bottom surface. The upper end of the feed pipe 4 is provided with two layers of upwardly bent branch pipes A401. The nozzles of the eight branch pipes A401 are evenly arranged around the inside of the combustion spray ring 2. The nozzles are fitted with nozzle sleeves A8. The ignition port of the ignition rod 3 is located below one of the nozzle sleeves A8. The secondary fuel mechanism includes a feed ring 9, which is installed below the bottom surface of the shell 1. The input pipe 901 of the feed ring 9 is located on one side of the bottom of the ring. The branch pipes B902 of the feed ring 9 are embedded in the shell wall of the shell 1. The nozzles of the eight branch pipes B902 are evenly arranged around the outside of the combustion spray ring 2. The nozzles are fitted with nozzle sleeves B10.

[0033] In this embodiment, the blower mechanism includes a drive motor 11, which is installed on the outer side of the shell 1. After the output end of the drive motor 11 passes through the shell, it meshes with the large gear ring 601 on the outer ring of the lower fan 6 through a gear. The lower end of the inner ring of the lower fan 6 is rotatably connected to the body of the feed pipe 4 through a bearing. The upper gear ring on the inner ring of the lower fan 6 meshes with the gear at the lower end of the drive shaft 12. The shaft body of the drive shaft 12 is rotatably connected to the shaft hole at the end of the clamp 13. The clamp 13 is installed on the body of the feed pipe 4. The gear at the upper end of the drive shaft 12 meshes with the gear ring at the lower end of the inner ring of the upper fan 5. The upper end of the inner ring of the upper fan 5 is rotatably connected to the top shaft of the drive shaft 12 through a bearing.

[0034] In this embodiment, the air intake mechanism includes an air intake pipe 14, which is installed on one side of the shell 1. The outlet end of the air intake pipe 14 is matched with the lower fan 6. The inlet end of the air intake pipe 14 is provided with an adjustable louver 15. The four corners of the inlet flange are respectively rotatably connected to the ends of threaded rods A16 and three sliding rods A17. The body of threaded rod A16 is threadedly connected to the threaded seat of pipe cover 18. The other end of threaded rod A16 is provided with an adjusting plate A19. The body of sliding rod A17 is slidably connected to the sliding seat of pipe cover 18. The sliding seat is provided with a fastening bolt that can limit the sliding of sliding rod A17. The inner side of pipe cover 18 and the inlet end of air intake pipe 14 are provided with mutually cooperating rubber rings 20. A foldable filter screen 21 is connected between the two rubber rings 20. The operator can adjust the opening and closing degree of the air intake mechanism by rotating the adjusting plate A19. When pipe cover 18 is adjusted to Figure 2 When the position is correct, the air intake mechanism is fully open, at which point the foldable filter 21 is pulled open; when the pipe cover 18 is adjusted to... Figure 1 When in position, the two rubber rings 20 are in contact, the air intake mechanism is closed, and the foldable filter 21 is folded.

[0035] The working principle of this invention is as follows:

[0036] The height of the reaction plate 7, the primary and secondary fuel flow rates, and the air flow rate were determined through CFD simulation, and the burner was debugged on-site based on the simulation data. During burner operation, the control module manipulates the gaseous fuel and oxidant (air, etc.) into the regulating module. The pressure and flow rate of both gases are monitored in this module and can be dynamically adjusted according to preset values, with the option for adjustment and emergency shut-off. After pressure and flow regulation, the fuel enters the ignition rod 3, feed pipe 4, and feed ring 9. The oxidant enters the cavity of the shell 1 through the opened air intake mechanism, starting the drive motor 11, which drives the upper and lower fans to rotate, delivering the oxidant at a certain flow rate to the combustion spray ring 2. In the combustion spray ring 2 cavity, the oxidant undergoes preliminary mixing with the primary fuel sprayed from the nozzle sleeve A8, and then secondary mixing with the secondary fuel sprayed from the nozzle sleeve B10 through the porous structure. Finally, it reaches the area below the reaction plate 7, is heated by the reaction plate 7, and begins the combustion reaction.

[0037] When the burner is cold-started, the temperature of the reaction plate 7 and the mixed gas is too low to initiate a superadiabatic combustion reaction. Therefore, continuous ignition is required via ignition rod 3. At this time, the burner will burn with a free-diffusion flame until the reaction plate 7 reaches the specified temperature. Subsequently, the control module will cut off the fuel supply to ignition rod 3 and increase the fuel flow in the primary and secondary fuel mechanisms. Since the flame front propagation speed is less than the fuel outlet speed, the flame will rise to the reaction plate 7 and begin a stable superadiabatic combustion reaction. At this time, the temperature of the reaction plate 7 is 1200-1300℃.

[0038] During superadiabatic combustion, the flame will form multiple small flames above the reaction plate 7. These small flames will combine to form a "combustion surface." This "combustion surface" allows the combustion reaction to be more uniform, rather than concentrated in a limited volume. The temperature distribution will also be more uniform, effectively reducing NOx emissions. In fact, during cold start-up, the NOx emission from the outlet flue gas is around 100 ppm; after the superadiabatic combustion reaction begins, the NOx emission from the outlet flue gas will drop to below 40 ppm.

[0039] This invention employs a two-stage fuel supply system. By adjusting the precise ratio of fuel supply through the execution and control modules, the combustion reaction is concentrated around the reaction disk 7, which has a high specific surface area. This enables ultra-adiabatic combustion, reducing the COe content in the burner outlet flue gas to 0-5 ppm and the NOx content to 0-10 ppm, achieving dual low and clean emissions. The reaction disk 7 can be freely adjusted in height as needed. The blower mechanism in the burner assists in air intake and combustion and is equipped with an ignition rod 3 for heat supplementation, ensuring stable ultra-adiabatic combustion under different conditions. The foldable filter screen 21 in the air intake mechanism can be laid out with the pipe cover, featuring convenience and compactness, making it suitable for furnace environments.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A circular flame super-insulated burner, comprising a shell (1), characterized in that: The top of the shell (1) is connected to the combustion spray ring (2), and the bottom surface of the shell (1) is connected to the primary and secondary fuel mechanisms and the ignition rod (3). Several nozzles of the feed pipe (4) of the primary fuel mechanism are distributed in a ring inside the combustion spray ring (2). The center of the ring is the upper fan (5) in the blower mechanism. The lower fan (6) linked with the upper fan (5) is provided with an air intake mechanism with an adjustable filter on one side. The air intake mechanism includes an air intake pipe (14). The air intake pipe (14) is installed on one side of the shell (1). The outlet end of the air intake pipe (14) is matched with the lower fan (6). The inlet end of the air intake pipe (14) is provided with an adjustable louver (15). Several threaded rods are rotatably connected to the flange at the inlet end. At the ends of A (16) and slide rod A (17), the threaded rod A (16) is threadedly connected to the threaded seat of the pipe cover (18). The other end of the threaded rod A (16) is provided with an adjusting plate A (19). The slide rod A (17) is slidably connected to the slide seat of the pipe cover (18). The slide seat is provided with a fastening bolt that can limit the sliding of the slide rod A (17). The inner side of the pipe cover (18) and the inlet end of the air inlet pipe (14) are provided with mutually cooperating rubber rings (20). A foldable filter screen (21) is connected between the two rubber rings (20). Several nozzles of the secondary fuel mechanism are arranged around the outside of the combustion spray ring (2). A retractable reaction plate (7) is provided above the combustion spray ring (2).

2. The circular flame super-insulated burner according to claim 1, characterized in that: The feed pipe (4) of the primary fuel mechanism is inserted into the shell (1) from the center of the bottom surface. The upper end of the feed pipe (4) is provided with two layers of upward-bent branch pipes A (401). The nozzles of the eight branch pipes A (401) are evenly arranged in the combustion spray ring (2). The nozzles are fitted with spray hole sleeves A (8). The ignition port of the ignition rod (3) is located below one of the spray hole sleeves A (8).

3. A circular flame super-insulated burner according to claim 1, characterized in that: The secondary fuel mechanism includes a feed ring (9), which is installed below the bottom surface of the shell (1). The input pipe (901) of the feed ring (9) is located on one side of the bottom of the ring body. The branch pipes B (902) of the feed ring (9) are embedded in the shell wall of the shell (1). The nozzles of the eight branch pipes B (902) are evenly arranged around the outside of the combustion spray ring (2). The nozzles are fitted with spray hole sleeves B (10).

4. A circular flame super-insulated burner according to claim 1, characterized in that: The blower mechanism includes a drive motor (11), which is installed on the outside of the shell (1). After the output end of the drive motor (11) passes through the shell, it meshes with the large gear ring (601) on the outer ring of the lower fan (6) through a gear. The lower end of the inner ring of the lower fan (6) is rotatably connected to the body of the feed pipe (4) through a bearing. The upper gear ring on the inner ring of the lower fan (6) meshes with the gear at the lower end of the drive shaft (12). The shaft body of the drive shaft (12) is rotatably connected to the shaft hole at the end of the clamp (13). The clamp (13) is installed on the body of the feed pipe (4). The gear at the upper end of the drive shaft (12) meshes with the gear ring at the lower end of the inner ring of the upper fan (5). The upper end of the inner ring of the upper fan (5) is rotatably connected to the top shaft of the drive shaft (12) through a bearing.

5. A circular flame super-insulated burner according to claim 1, characterized in that: The shell (1) is connected to the furnace wall (22) through the shell flange. The inner side of the furnace wall (22) is covered with refractory material (23). The outer side of the furnace wall (22) is surrounded by a number of threaded seats and slides. The threaded seats are threaded to the body of the threaded rod B (24). The upper end of the threaded rod B (24) passes through the refractory material (23) and is rotatably connected to the transfer pipe (25). The transfer pipe (25) is connected to the bottom of the reaction plate (7) by fastening bolts. The lower end of the threaded rod B (24) is provided with an adjusting plate B (26). The slide is slidably connected to the slide rod B (27). The body of the slide is provided with fastening bolts that can restrict the sliding of the slide rod B (27). The upper end of the slide rod B (27) is connected to the bottom of the reaction plate (7) by fastening bolts.

6. A circular flame super-insulated burner according to claim 1, characterized in that: The burner is equipped with a control module, which adjusts the pressure and flow rate of fuel injected by the primary and secondary fuel mechanisms through the adjustment and execution module. The primary fuel supply is 20%-30%, and the secondary fuel supply is 70%-80%.

7. A circular flame super-insulated burner according to claim 1, characterized in that: The combustion spray ring (2) is a hollow cylinder with a slope on the upper outer side. The top of the slope has a certain pore structure, which can guide the internal fluid to the outside of the cylinder in a specific pattern.

8. A circular flame super-insulated burner according to claim 1, characterized in that: The reaction disk (7) has a diameter range of 100-800mm and a height range of 20mm-200mm, and its surface has a porous structure.

9. A circular flame super-insulated burner according to claim 1, characterized in that: The matrix material of the reaction disk (7) includes one or more of silicon carbide, silicon nitride, mullite, cordierite, aluminum titanate, alumina, diatomite, zircon, and magnesite.

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