Internal exhaust gas recirculation type fuel incineration burner

Abstract

The invention discloses an internal exhaust gas recirculation type fuel incineration burner, which belongs to the technical field of fuel incineration burners and comprises an incineration burner assembly. The air inlet area adjusting assembly is arranged on the incineration burner assembly and used for controlling the amount of air entering the incineration burner assembly; the air pressure adjusting structure is arranged on the incineration burner assembly and used for adjusting the air pressure in the incineration burner assembly in a self-adaptive mode; and a flue gas circulation assembly. Through linkage of the driving assembly, the adjusting assembly and the air pressure adjusting structure, automatic and accurate adjustment of the air inlet amount and the air pressure is achieved, a complex external control system is not needed, the combustion working condition change can be responded in real time, it is ensured that the combustion process is stable and efficient, and harmful gas emission is reduced; by combining the design of a one-way valve, stable circulation of flue gas is guaranteed, the energy recycling rate is increased, the energy consumption cost of incineration treatment is reduced, and the requirements of energy conservation and emission reduction are met.

Description

Technical Field

[0001] This invention belongs to the technical field of fuel combustion burners, specifically referring to an internal exhaust gas recirculation type fuel combustion burner. Background Technology

[0002] In the field of incineration, the incinerator is a core piece of equipment, and its performance directly affects incineration efficiency, pollutant emissions, and energy utilization.

[0003] Currently, traditional incinerators face numerous technical bottlenecks: First, the air intake regulation system largely relies on manual control or simple mechanical structures, which cannot accurately adjust according to real-time changes in gas pressure within the combustion chamber, easily leading to incomplete combustion and the generation of large amounts of harmful gases; Second, the gas pressure regulation device has a complex structure, requiring external sensors and control systems, resulting in high costs and a high failure rate, making it difficult to achieve automatic and stable gas pressure regulation; Third, the flue gas recirculation system is poorly designed, and the flue gas recirculation volume cannot be dynamically adjusted according to combustion conditions, resulting in low energy recovery efficiency and resource waste. Summary of the Invention

[0004] In view of the above situation and to overcome the shortcomings of the prior art, the present invention provides an internal exhaust gas recirculation type fuel incinerator, which effectively solves the problems currently on the market.

[0005] The technical solution adopted by this invention is as follows: This invention proposes an internal exhaust gas recirculation type fuel incinerator, including an incinerator assembly for reducing harmful substances in exhaust gas through combustion; an air inlet area adjustment assembly, disposed on the incinerator assembly, including a mounting shell, an adjustment assembly, and a drive assembly, wherein the mounting shell is detachably connected to the incinerator assembly, and the adjustment assembly and drive assembly are both disposed on the mounting shell for adjusting the air inlet volume according to the gas pressure inside the incinerator assembly; a gas pressure adjustment structure, disposed on the incinerator assembly, for adaptively adjusting the gas pressure inside the incinerator assembly; and a flue gas recirculation assembly, disposed on the incinerator assembly, for realizing the recirculation of exhaust gas.

[0006] Furthermore, the adjustment assembly includes a wind deflector symmetrically arranged on the mounting housing, and the wind deflector is slidably connected to the mounting housing through the housing; a bidirectional screw, which is rotatably connected to the protective housing through the housing, and the threaded structures on the bidirectional screw are in opposite directions; and a transmission rod, one end of which is threaded to the bidirectional screw, and the other end of which is fixedly connected to the wind deflector.

[0007] Furthermore, the drive assembly includes a driven bevel gear fixedly connected to a bidirectional screw; a drive bevel gear meshing with the driven bevel gear and disposed within a protective housing for driving the driven bevel gear to rotate; a rotating shaft fixedly connected to the drive bevel gear at one end; and a mating gear fixedly connected to the end of the rotating shaft away from the drive bevel gear.

[0008] Furthermore, the pressure regulating structure includes a sealed outer shell, detachably connected to the incinerator assembly; a movable plate, slidably connected inside the sealed outer shell; and a return spring, evenly distributed between the movable plate and the sealed outer shell, with one end of the return spring fixedly connected to the sealed outer shell and the other end of the return spring fixedly connected to the movable plate.

[0009] Furthermore, the air pressure regulating structure also includes a lifting block that penetrates and slides through the sealed outer shell; a squeezing block that is fixedly connected to the lifting block and has a "V" shape; and a drive rack that is fixedly connected to the squeezing block.

[0010] Furthermore, the flue gas recirculation assembly includes a flue gas duct that runs through and is fixedly connected to the incinerator assembly; an air passage that is slidably connected inside the flue gas duct and has a through hole structure; a connecting rod that is rotatably connected at one end to the edge of the air passage; and a fixing plate that is symmetrically arranged on the flue gas duct and is fixedly connected to the flue gas duct.

[0011] Furthermore, the flue gas recirculation assembly also includes movable clamps symmetrically arranged on the fixed plate, and the movable clamps are slidably connected to the fixed plate; telescopic springs are arranged between the movable clamps, and both ends of the telescopic springs are fixedly connected to the movable clamps respectively; a circulation pipe, one end of which passes through and is fixedly connected to the flue gas pipe, and the other end of which passes through and is fixedly connected to the incinerator assembly; and a one-way valve, which is arranged at the end of the circulation pipe near the incinerator assembly.

[0012] Furthermore, the other end of the connecting rod is rotatably connected to the upper surface of the lifting block, the extrusion block is located below the movable clamping plate, and the bottom of the movable clamping plate abuts against the inner surface of the extrusion block, driving the rack to mesh with the mating gear.

[0013] Furthermore, the incinerator assembly may include a burner housing; an igniter symmetrically disposed on the burner housing, the igniter penetrating and fixedly connected to the burner housing; an induced draft fan fixedly installed at the end of the burner housing away from the sealing housing, for introducing airflow into the burner housing; and a dustproof housing detachably connected to the burner housing.

[0014] The beneficial effects achieved by the present invention using the above structure are as follows:

[0015] (1) Through the linkage of the drive component, the adjustment component and the pressure adjustment structure, the intake volume and pressure are automatically and accurately adjusted. No complex external control system is required. It can respond to changes in combustion conditions in real time, ensure stable and efficient combustion process, reduce harmful gas emissions. The flue gas circulation component uses the flue gas pressure itself to automatically adjust the circulation volume. Combined with the one-way valve design, it ensures stable flue gas circulation, improves energy recovery and utilization rate, reduces the energy consumption cost of incineration, and meets the requirements of energy conservation and emission reduction.

[0016] (2) Each component adopts a modular design, such as detachable connection of sealed shell and protective shell, which facilitates installation, maintenance and replacement; the connection method between components (such as sliding connection and meshing transmission) ensures stable power transmission, reduces the risk of failure, and extends the service life of the equipment. The air pressure regulation, air intake regulation and flue gas circulation system are linked to form a collaborative working mode, which optimizes the overall performance of the burner, can adapt to a variety of combustion conditions, improves the efficiency and quality of combustion treatment, and enhances the applicability and competitiveness of the equipment. Attached Figure Description

[0017] Figure 1 The present invention proposes a three-dimensional structure for an internal exhaust gas recirculation type fuel combustion burner. Figure 1 ;

[0018] Figure 2 The present invention proposes a three-dimensional structure for an internal exhaust gas recirculation type fuel combustion burner. Figure 2 ;

[0019] Figure 3 The present invention proposes a three-dimensional structure for an internal exhaust gas recirculation type fuel combustion burner. Figure 3 ;

[0020] Figure 4 The present invention proposes a three-dimensional structure for an internal exhaust gas recirculation type fuel combustion burner. Figure 4 ;

[0021] Figure 5 A three-dimensional schematic diagram of the air intake area adjustment component;

[0022] Figure 6 An exploded view of the pressure regulation structure and flue gas recirculation components;

[0023] Figure 7 Three-dimensional for flue gas recirculation components Figure 1 ;

[0024] Figure 8 Three-dimensional for flue gas recirculation components Figure 2 .

[0025] The components include: 1. Incinerator assembly; 101. Burner housing; 102. Igniter; 103. Exhaust fan; 104. Dustproof housing; 2. Air inlet area adjustment assembly; 201. Mounting housing; 202. Baffle plate; 203. Protective housing; 204. Double-acting screw; 205. Transmission rod; 206. Driven bevel gear; 207. Driven bevel gear; 208. Rotating shaft; 209. Connecting gear; 3. Gas pressure adjustment structure; 301. Sealing housing; 302. Movable plate; 303. Return spring; 304. Lifting block; 305. Pressing block; 306. Drive rack; 4. Flue gas recirculation assembly; 401. Flue gas duct; 402. Air passage cylinder; 403. Connecting rod; 404. Fixing plate; 405. Movable clamp; 406. Telescopic spring; 407. Circulation duct; 408. One-way valve.

[0026] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and 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 this invention.

[0029] like Figures 1-8 As shown.

[0030] In some embodiments, the air intake area adjustment assembly 2 may include a mounting housing 201, an adjustment assembly, and a drive assembly. The mounting housing 201 is detachably connected to the incinerator burner assembly 1. The adjustment assembly and the drive assembly are both mounted on the mounting housing 201 and are used to adjust the air intake volume according to the gas pressure inside the incinerator burner assembly 1.

[0031] The adjustment assembly includes a wind deflector 202, symmetrically arranged on the mounting housing 201, with the wind deflector 202 penetrating and slidably connected to the mounting housing 201; a protective housing 203, detachably connected to the mounting housing 201; a bidirectional screw 204, penetrating and rotatably connected to the protective housing 203, with the threaded structures on the bidirectional screw 204 having opposite directions; and a transmission rod 205, one end of which is threadedly connected to the bidirectional screw 204, and the other end of which is fixedly connected to the wind deflector 202.

[0032] In this embodiment, the bidirectional screw 204 penetrates the protective shell 203 and is rotatable. Its opposing threaded structure allows the transmission rod 205, which is threaded to it, to move in the opposite direction along the screw's axis when the bidirectional screw 204 is rotated. The transmission rod 205 drives the wind deflector 202 to slide on the mounting shell 201, thereby changing the distance and wind deflection angle between the two wind deflectors 202. This allows for flexible adjustment of the wind deflection range and direction, enabling precise control of airflow according to actual needs and meeting wind deflection requirements in different scenarios. The bidirectional screw 204 is rotatably connected to the protective shell 203, which provides stable support and a mounting base for the bidirectional screw 204, ensuring stability during screw rotation. One end of the transmission rod 205 is threaded to the bidirectional screw 204, and the other end is fixedly connected to the wind deflector 202. This connection method stably converts the screw's rotational motion into the linear sliding of the wind deflector 202, ensuring a stable and reliable transmission process, reducing swaying and deviation during movement, and guaranteeing the accuracy of wind deflection adjustment.

[0033] In some embodiments, the drive assembly may include a driven bevel gear 206 fixedly connected to a bidirectional screw 204; a drive bevel gear 207 meshing with the driven bevel gear 206 and disposed within a protective housing 203 for driving the driven bevel gear 206 to rotate; a rotating shaft 208 fixedly connected at one end to the drive bevel gear 207; and a mating gear 209 fixedly connected to the end of the rotating shaft 208 away from the drive bevel gear 207.

[0034] External force acts on the mating gear 209, causing it to drive the rotating shaft 208 to rotate. Since one end of the rotating shaft 208 is fixedly connected to the driving bevel gear 207, the driving bevel gear 207 rotates synchronously with the rotating shaft 208. The driving bevel gear 207 meshes with the driven bevel gear 206, thereby transmitting the rotational power to the driven bevel gear 206. The driven bevel gear 206 is fixedly connected to the bidirectional screw 204, thereby driving the bidirectional screw 204 to rotate, realizing the conversion of the rotational motion of the mating gear 209 into the rotational motion of the bidirectional screw 204, and finally driving the baffle 202 in the adjustment assembly to slide and adjust.

[0035] In this embodiment, the meshing transmission between the driving bevel gear 207 and the driven bevel gear 206 converts the horizontal rotational power of the rotating shaft 208 into the vertical rotational power of the bidirectional screw 204, meeting the power input direction requirements of the adjustment component. This makes the overall structure of the device more flexible and compact, facilitating installation and space utilization. The bevel gear meshing transmission has a large transmission ratio and load-bearing capacity, effectively transmitting large torques, and the transmission process is smooth, with low vibration and low noise. The precise meshing of the driving bevel gear 207 and the driven bevel gear 206, combined with the stable connection of the rotating shaft 208 and the mating gear 209, ensures the stability and efficiency of power transmission, reduces power loss, and ensures that the bidirectional screw 204 can rotate stably and reliably, thereby achieving precise adjustment of the baffle 202.

[0036] In some embodiments, the pressure regulating structure 3 may include a sealed housing 301, detachably connected to the incinerator assembly 1; a movable plate 302, slidably connected inside the sealed housing 301; a return spring 303, evenly distributed between the movable plate 302 and the sealed housing 301, with one end of the return spring 303 fixedly connected to the sealed housing 301 and the other end of the return spring 303 fixedly connected to the movable plate 302; a lifting block 304, penetrating and slidably connected to the sealed housing 301; a pressing block 305, fixedly connected to the lifting block 304, and the pressing block 305 being "V" shaped; and a drive rack 306, fixedly connected to the pressing block 305.

[0037] When the gas pressure inside the incinerator assembly 1 changes, the gas pressure acts on the movable plate 302, pushing it to slide within the sealed housing 301. If the gas pressure increases, the movable plate 302 overcomes the elastic force of the return spring 303 and moves away from the gas pressure source, causing the lifting block 304 connected to it to slide through the sealed housing 301. This causes the "V"-shaped extrusion block 305 fixed on the lifting block 304 to move synchronously. During the movement of the extrusion block 305, it will drive the drive rack 306 connected to it to move. After the drive rack 306 moves, it can link other transmission components to adjust the air intake or exhaust channels of the incinerator assembly 1 to reduce the internal gas pressure. When the gas pressure decreases, the return spring 303 releases its elastic force, pushing the movable plate 302 to reset, causing the lifting block 304, extrusion block 305, and drive rack 306 to move in the opposite direction, readjusting the channel state, and causing the gas pressure to rise again, thereby achieving automatic gas pressure regulation.

[0038] In this embodiment, by utilizing the balance between the pressure of the air pressure on the movable plate 302 and the elastic force of the return spring 303, the adjustment action can be automatically triggered according to the change of air pressure in the incinerator assembly 1 without the need for an additional complex control system. This maintains the internal air pressure within a stable range, ensuring stable operation of the burner. The sealing shell 301 is detachably connected to the incinerator assembly 1, facilitating installation and maintenance. The sliding connection between the movable plate 302, the lifting block 304 and the sealing shell 301, as well as the fixed connection between the return spring 303 and the movable plate 302 and the sealing shell 301, ensure that each component can work stably and collaboratively under force, reducing the risk of adjustment failure due to loosening. At the same time, the compact structural design saves space and is adaptable to various installation environments.

[0039] In some embodiments, the flue gas recirculation assembly 4 may include a flue gas duct 401 that passes through and is fixedly connected to the incinerator assembly 1; an air passage 402 that is slidably connected to the flue gas duct 401 and has a through hole structure; a connecting rod 403 that is rotatably connected at one end to the edge of the air passage 402; a fixing plate 404 that is symmetrically arranged on the flue gas duct 401 and is fixedly connected to the flue gas duct 401; movable clamping plates 405 that are symmetrically arranged on the fixing plate 404 and are slidably connected to the fixing plate 404; a telescopic spring 406 that is arranged between the movable clamping plates 405 and is fixedly connected to the movable clamping plates 405 at both ends; a circulation duct 407 that passes through and is fixedly connected to the flue gas duct 401 at one end and passes through and is fixedly connected to the incinerator assembly 1 at the other end; and a one-way valve 408 that is arranged at the end of the circulation duct 407 near the incinerator assembly 1.

[0040] In this embodiment, the movement of components such as the gas flow cylinder 402 and the movable clamp 405 is driven by the pressure change of the flue gas itself, without the need for additional complex power devices. The flue gas circulation volume is automatically adjusted to ensure stable circulation of flue gas between the incinerator assembly 1 and the circulation pipe 407, thereby improving energy utilization.

[0041] The other end of the connecting rod 403 is rotatably connected to the upper surface of the lifting block 304. The pressing block 305 is located below the movable clamping plate 405, and the bottom of the movable clamping plate 405 abuts against the inner surface of the pressing block 305. The drive rack 306 meshes with the docking gear 209.

[0042] In some embodiments, the incinerator assembly 1 may include a burner housing 101; an igniter 102 symmetrically disposed on the burner housing 101, the igniter 102 penetrating and fixedly connected to the burner housing 101; an induced draft fan 103 fixedly installed at the end of the burner housing 101 away from the sealing housing 301, for introducing airflow into the burner housing 101; and a dustproof housing 104 detachably connected to the burner housing 101.

[0043] When the gas pressure inside the incinerator assembly 1 changes, the gas pressure acts on the movable plate 302. If the gas pressure increases, the movable plate 302 overcomes the elastic force of the return spring 303 and slides inside the sealed housing 301, driving the lifting block 304 to move, causing the "V"-shaped pressing block 305 to move synchronously, pushing the drive rack 306 to move; the drive rack 306, in conjunction with other transmission components, adjusts the air intake or exhaust channel to reduce the gas pressure. When the gas pressure decreases, the return spring 303 pushes the movable plate 302 to reset, adjusting the channel in the opposite direction, causing the gas pressure to rise again, thus achieving automatic and stable gas pressure regulation.

[0044] When the gas pressure inside the incinerator assembly 1 changes, the movable plate 302 is displaced. The movable plate 302 drives the drive rack 306 to move upward. The rack 306 acts on the mating gear 209, causing the rotating shaft 208 to rotate. The drive bevel gear 207 rotates accordingly. By meshing with the driven bevel gear 206, the power is transmitted to the bidirectional screw 204. When the bidirectional screw 204 rotates, due to the opposite direction of its thread structure, it drives the transmission rod 205 connected to it to move in the opposite direction. This causes the baffle plate 202 to slide on the mounting housing 201, changing the distance and angle between the baffle plates 202, thereby achieving precise adjustment of the air intake to match the current gas pressure and combustion requirements.

[0045] When the lifting block 304 moves upward, it drives the air passage cylinder 402 to move upward inside the flue gas duct 401 via the connecting rod 403, thereby releasing the gas inside the burner housing 101. At the same time, the lifting block 304 drives the squeezing block 305 to move upward. The upward movement of the squeezing block 305 causes the movable clamping plate 405 to move inward synchronously, thereby reducing the diameter of the circulation pipe 407 and reducing the air flow rate. The gas inside the burner housing 101 is discharged through the air passage cylinder 402, preventing excessive gas pressure inside the burner housing 101. The above is the overall working process of this invention. This step can be repeated for the next use. The actual operation process is very simple and easy to implement.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0048] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. An internal exhaust gas recirculation type fuel incinerator, characterized in that: include: Incinerator assembly (1) for reducing harmful substances in exhaust gas through combustion; An air intake area adjustment component (2) is provided on the incinerator burner assembly (1) and includes a mounting housing (201), an adjustment component and a drive component. The mounting housing (201) is detachably connected to the incinerator burner assembly (1). The adjustment component and the drive component are both provided on the mounting housing (201) and are used to adjust the air intake volume according to the gas pressure inside the incinerator burner assembly (1). A pressure regulating structure (3) is installed on the incinerator assembly (1) for adaptively regulating the pressure inside the incinerator assembly (1); A flue gas recirculation assembly (4) is installed on the incinerator assembly (1) to realize the recirculation of exhaust gas.

2. The internal exhaust gas recirculation type fuel incinerator according to claim 1, characterized in that: The adjustment assembly includes a wind deflector (202) symmetrically arranged on the mounting housing (201), and the wind deflector (202) is slidably connected to the mounting housing (201); a bidirectional screw (204) is rotatably connected to the protective housing (203), and the thread structure on the bidirectional screw (204) is opposite in direction; and a transmission rod (205) with one end threaded to the bidirectional screw (204) and the other end fixedly connected to the wind deflector (202).

3. The internal exhaust gas recirculation type fuel incinerator according to claim 2, characterized in that: The drive assembly includes a driven bevel gear (206) fixedly connected to a bidirectional screw (204); a drive bevel gear (207) meshing with the driven bevel gear (206), and the drive bevel gear (207) is disposed inside the protective housing (203) for driving the driven bevel gear (206) to rotate; a rotating shaft (208) fixedly connected to the drive bevel gear (207) at one end; and a mating gear (209) fixedly connected to the end of the rotating shaft (208) away from the drive bevel gear (207).

4. The internal exhaust gas recirculation type fuel incinerator according to claim 3, characterized in that: The pressure regulating structure (3) includes a sealed outer shell (301) which is detachably connected to the incinerator assembly (1); a movable plate (302) which is slidably connected inside the sealed outer shell (301); and a return spring (303) which is evenly distributed between the movable plate (302) and the sealed outer shell (301), with one end of the return spring (303) fixedly connected to the sealed outer shell (301) and the other end of the return spring (303) fixedly connected to the movable plate (302).

5. The internal exhaust gas recirculation type fuel incinerator according to claim 4, characterized in that: The air pressure regulating structure (3) also includes a lifting block (304) that penetrates and slides through the sealed housing (301); a pressing block (305) that is fixedly connected to the lifting block (304) and the pressing block (305) is V-shaped; and a drive rack (306) that is fixedly connected to the pressing block (305).

6. The internal exhaust gas recirculation type fuel incinerator according to claim 5, characterized in that: The flue gas recirculation assembly (4) includes a flue gas duct (401) that runs through and is fixedly connected to the incinerator assembly (1); an air passage (402) that is slidably connected inside the flue gas duct (401) and has a through hole structure; a connecting rod (403) that is rotatably connected at one end to the edge of the air passage (402); and a fixing plate (404) that is symmetrically arranged on the flue gas duct (401) and is fixedly connected to the flue gas duct (401).

7. The internal exhaust gas recirculation type fuel incinerator according to claim 6, characterized in that: The flue gas recirculation assembly (4) also includes a movable clamping plate (405), which is symmetrically arranged on the fixed plate (404), and the movable clamping plate (405) is slidably connected to the fixed plate (404); A telescopic spring (406) is disposed between movable clamps (405), and both ends of the telescopic spring (406) are fixedly connected to the movable clamps (405); a circulation pipe (407) is connected to the flue gas pipe (401) at one end and to the incinerator assembly (1) at the other end; a one-way valve (408) is disposed at one end of the circulation pipe (407) near the incinerator assembly (1).

8. The internal exhaust gas recirculation type fuel incinerator according to claim 7, characterized in that: The other end of the connecting rod (403) is rotatably connected to the upper surface of the lifting block (304), the pressing block (305) is located below the movable clamping plate (405), and the bottom of the movable clamping plate (405) abuts against the inner surface of the pressing block (305), and the drive rack (306) meshes with the docking gear (209).

9. The internal exhaust gas recirculation type fuel incinerator according to claim 8, characterized in that: The incinerator burner assembly (1) may include a burner housing (101); an igniter (102) symmetrically disposed on the burner housing (101), the igniter (102) penetrating and fixedly connected to the burner housing (101); an induced draft fan (103) fixedly installed at one end of the burner housing (101) away from the sealing housing (301) for introducing airflow into the burner housing (101); and a dustproof housing (104) detachably connected to the burner housing (101).

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