Automatic deashing, coking-free and smoke-free combustion-supporting particle burner

Abstract

The invention discloses an automatic deashing, coking-free and smoke-free combustion-supporting particle burner which comprises a mounting base assembly, a combustion chamber assembly, a combustion chamber assembly and a combustion chamber assembly. The mounting base assembly is used for supporting and transporting the whole particle burner; the feeding assembly is used for conveying granular fuel, and the feeding assembly is located on the mounting base assembly; the furnace nozzle assembly is used for combusting the granular fuel conveyed by the feeding assembly, and the furnace nozzle assembly is located at the output end of the feeding assembly; the ash pushing assembly is used for scarifying the granular fuel in the furnace mouth and pushing furnace ash generated after the granular fuel in the furnace mouth is combusted out of the furnace mouth; secondary combustion of granular fuel is achieved through the air bellow assembly and the furnace nozzle assembly, and the effects of no smoke and fuel value increase during combustion of the granular fuel are achieved; through the ash pushing recommendation, the functions of automatically cleaning ash, scarifying combusting granular fuel and pushing coked objects out of a combustion area in time are achieved, the furnace nozzle is protected, the furnace nozzle is prevented from being damaged, and the service life of the furnace nozzle is prolonged.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of fruit and vegetable drying pellet combustion machine, and relates to an automatic dust cleaning, non-coking and smoke-free combustion pellet combustion machine. BACKGROUND

[0002] At present, the pellet combustion machine and the furnace combination are mainly used in the field of fruit and vegetable drying in China to provide heat for the drying room. The traditional pellet combustion machine can only meet the primary combustion, resulting in insufficient combustion, and the flammable gas such as carbon monoxide and methane is directly discharged, which not only wastes the flammable resources but also pollutes the environment.

[0003] Based on the current drying status and the development of the society, the requirements for energy saving and environmental protection are higher and higher, and the tail gas recovery and treatment are also paid more and more attention. Therefore, the secondary combustion technology of the pellet combustion machine is imminent.

[0004] At present, all combustion machines need to be manually cleaned, which is relatively troublesome. Therefore, the automatic dust cleaning function is adopted to reduce the maintenance frequency of the user.

[0005] At present, the cost of coal and wood is relatively low, which is lower than that of the pellet. Through the optimization design of the auger pipe and the auger, the pellet and the coal and wood can be burned, which greatly reduces the use cost of the user.

[0006] The Chinese utility model patent with the authorized announcement number CN204438098U discloses a biomass pellet combustion device, which comprises a furnace body, a feeding port, a pellet fuel and a combustion chamber. The feeding port is communicated with the inside of the furnace body, and a pushing mechanism is arranged below the feeding port. A pushing rod is arranged in the pushing mechanism. The upper end of the furnace body is provided with a smoke exhaust port, and the smoke exhaust port is connected with a waste heat recovery device. A primary air chamber is arranged below the combustion chamber, and a wind hole is arranged between the primary air chamber and the combustion chamber. A ignition hole is arranged above the wind hole. A secondary air chamber is arranged on the right side of the combustion chamber and communicated with the combustion chamber. The secondary air chamber is connected with a secondary air pipe. A feeding and drying device is arranged above the feeding port, and a drying box is arranged in the feeding and drying device. The Chinese invention patent with the authorized announcement number CN105003908B discloses a biomass pellet fuel combustion machine, which comprises a shell, a feeding system, a burner and a main fan. The output end of the material mixing auger of the feeding system is connected with a pushing auger, and the output end of the pushing auger is connected with the burner. The burner comprises a horizontally arranged double-layer structure cylinder. The inner cavity of the inner cylinder constitutes a pellet fuel combustion chamber. The cavity between the inner cylinder and the outer cylinder constitutes a air supply chamber, and the air supply chamber is connected with the main fan. The cylinder wall of the inner cylinder is provided with an air supply hole which is connected with the combustion chamber and the air supply chamber. Chinese invention patent CN104791767A discloses a biomass pellet burner and its usage method. The biomass pellet burner includes a lower ash chamber, a middle combustion chamber, and an upper flame chamber, which are interconnected from bottom to top. The combustion chamber is surrounded by air ducts for preheating and insulation. The burner also includes an ash chamber, an automatic feeding section, an air circulation section, and an automatic ash discharge section. The usage method of the equipment is also described. The existing technology described above suffers from the fact that there are no standards for pellet fuel on the market, resulting in inconsistent pellet fuel composition. Some pellets are prone to coking during combustion, which affects combustion and can even crack the burner nozzle, causing damage to the pellet burner. Summary of the Invention

[0007] To address the problems mentioned above, where the lack of standards for commercially available pellet fuel leads to inconsistent fuel composition and the tendency for some pellets to coke during combustion, thus affecting combustion and potentially cracking the burner nozzle and damaging the pellet burner, this invention proposes an automatic ash-cleaning, coke-free, smokeless, and combustion-aiding pellet burner. This invention effectively solves the problems in existing technologies where the lack of standards for commercially available pellet fuel results in inconsistent fuel composition and the tendency for some pellets to coke during combustion, affecting combustion and potentially cracking the burner nozzle and damaging the pellet burner.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an automatic ash-removing, coking-free, smokeless, combustion-aiding pellet burner, comprising: a mounting base assembly for supporting and transporting the entire pellet burner; a feeding assembly for conveying pellet fuel, the feeding assembly being located on the mounting base assembly; a burner nozzle assembly for burning the pellet fuel conveyed by the feeding assembly, the burner nozzle assembly being located at the output end of the feeding assembly; and an ash-pushing assembly for loosening the pellet fuel in the burner nozzle and pushing out the ash from the burner nozzle after the pellet fuel has burned.

[0009] Furthermore, the mounting base assembly includes an upper support frame and a lower support frame. The upper support frame and the lower support frame are connected and fixed by four support connecting pipes arranged in a rectangular array. The lower support frame has four casters arranged in a rectangular array on its lower side. An adjustment component for adjusting the height is provided between the lower support frame and the casters.

[0010] Furthermore, the adjustment assembly includes a threaded post that is threaded through and connected to the lower support frame, the universal wheel is fixedly connected to the lower end of the threaded post, and fixing nuts that are threadedly connected to the threaded post are provided on both the upper and lower sides of the lower support frame, the fixing nuts being in contact with the upper and lower sides of the lower support frame.

[0011] Furthermore, the feeding assembly includes a mounting box disposed on the upper side of the upper support frame, a conveying cylinder disposed inside the mounting box, an auger rotatably connected inside the conveying cylinder, a material box disposed on the upper side of the mounting box, the lower end of the material box being connected to the rear end of the circumferential side of the conveying cylinder, and a driving assembly for driving the auger to rotate disposed inside the mounting box.

[0012] Furthermore, the drive assembly includes a feeding motor installed inside the hopper, the rear end of the auger extends out of the feeding cylinder and is fixedly connected to the output shaft of the feeding motor via a coupling, and a small controller electrically connected to the feeding motor is provided on the upper side of the mounting box.

[0013] Furthermore, the nozzle assembly includes a rear baffle fixedly connected to the output end of the feeding cylinder. The rear baffle has a through-hole communicating with the feeding cylinder, and the through-hole has the same inner diameter as the feeding cylinder. The front side of the rear baffle is provided with an inner liner and an outer liner, and the inner liner and the outer liner cooperate to form an air supply chamber. The left, right and lower sides of the inner liner are provided with multiple air supply holes. An air box assembly is provided between the nozzle assembly and the feeding assembly. An ignition device is provided on the rear baffle.

[0014] Furthermore, the ignition device includes an ignition rod mounting seat disposed on the rear side of the rear baffle, wherein an ignition rod is disposed within the ignition rod mounting seat, and the ignition end of the ignition rod extends out from the front side of the rear baffle.

[0015] Furthermore, the air box assembly includes an air box disposed between the rear baffle and the mounting box, the air box being connected to the air supply chamber, a blower being disposed inside the air box, and a baffle plate being disposed on the outer side of the air box.

[0016] Furthermore, the bellows has symmetrical maintenance openings on its left and right sides, and a baffle is detachably connected to each maintenance opening.

[0017] Furthermore, the ash-pushing assembly includes an electric push rod disposed within the mounting box. The output end of the electric push rod is equipped with a push rod, and the end of the push rod away from the electric push rod is equipped with a mounting plate. Two push rods are symmetrically arranged on the front side of the mounting plate, and two travel guide sleeves are symmetrically arranged on the rear baffle. The two push rods are slidably connected within the two travel guide sleeves, and the ends of the two push rods can extend through the travel guide sleeves to the inner side of the inner liner. A push-pull rod is slidably connected to the front side of the mounting plate, and an ash-pushing rod is disposed at the front end of the push-pull rod. An ash-pushing plate is disposed at the end of the ash-pushing rod away from the mounting plate. A rectangular opening is provided on the front side of the inner liner to allow the ash-pushing plate to extend. An ash discharge port is provided through the lower side of the inner liner, and the ash-pushing plate can move to close the ash discharge port.

[0018] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention achieves secondary combustion of pellet fuel through the bellows assembly and the burner assembly, thereby achieving the effect of smokeless combustion and increased calorific value of pellet fuel. Due to more complete combustion, less ash is produced and fewer maintenance is required. (2) The present invention realizes automatic ash removal and loosening of burning particulate fuel through the ash pushing component, which can push the coked object out of the combustion area in time, protect the nozzle, prevent the nozzle from being damaged, and extend the service life of the nozzle. (3) The present invention realizes rapid feeding of pellet fuel through the feeding component, which improves the convenience of the staff when feeding and further improves the working efficiency of the device when in use. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention; Figure 2 This is a three-dimensional view of the internal structure of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a first perspective view of the ash-pushing component of the present invention; Figure 5 This is a second perspective view of the ash-pushing component of the present invention; Figure 6 This is a perspective view of the burner nozzle assembly of the present invention; Figure 7 For the present invention Figure 6 The front view; Figure 8 This is a perspective view of the mounting base assembly for the present invention.

[0020] In the diagram: 1. Upper support frame; 2. Lower support frame; 3. Support connecting pipe; 4. Threaded column; 5. Fixing nut; 6. Caster wheel; 7. Mounting box; 8. Material box; 9. Air box; 10. Baffle; 11. Inner liner; 111. Air outlet; 112. Rectangular opening; 12. Outer liner; 13. Ash discharge port; 14. Feeding cylinder; 15. Screwdriver; 16. Feeding motor; 17. Controller; 18. Coupling; 19. Electric push rod; 20. Push rod; 21. Mounting plate; 22. Push-pull rod; 23. Ash push rod; 24. Ash push plate; 25. Material push rod; 26. Stroke guide sleeve; 27. Wind baffle. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0022] An automatic ash-removing, coking-free, smokeless, and combustion-aiding pellet burner includes: a mounting base assembly for supporting and transporting the entire pellet burner; a feeding assembly for conveying pellet fuel, the feeding assembly being located on the mounting base assembly; a burner nozzle assembly for burning the pellet fuel conveyed by the feeding assembly, the burner nozzle assembly being located at the output end of the feeding assembly; and an ash-pushing assembly for loosening the pellet fuel in the burner nozzle and pushing out the ash from the burner nozzle after the pellet fuel has burned.

[0023] In this embodiment, the mounting base assembly includes an upper support frame 1 and a lower support frame 2. The upper support frame 1 and the lower support frame 2 are connected and fixed by four support connecting pipes 3 arranged in a rectangular array. The lower support frame 2 has four casters 6 arranged in a rectangular array on its lower side. An adjustment component for adjusting the height is provided between the lower support frame 2 and the casters 6.

[0024] In this embodiment, the adjustment component includes a threaded post 4 that is threaded through and connected to the lower support frame 2. The universal wheel 6 is fixedly connected to the lower end of the threaded post 4. Fixing nuts 5 that are threaded through and connected to the threaded post 4 are provided on both the upper and lower sides of the lower support frame 2. The fixing nuts 5 are in contact with the upper and lower sides of the lower support frame 2.

[0025] In this embodiment, the feeding assembly includes a mounting box 7 disposed on the upper side of the upper support frame 1. A conveying cylinder is disposed inside the mounting box 7, and an auger 15 is rotatably connected inside the conveying cylinder. A material box 8 is disposed on the upper side of the mounting box 7, and the lower end of the material box 8 is connected to the rear end of the circumferential side of the conveying cylinder. A driving assembly for driving the auger 15 to rotate is disposed inside the mounting box 7.

[0026] In this embodiment, the drive assembly includes a feeding motor 16 disposed in the material box 8, the rear end of the auger 15 extends out of the feeding cylinder 14 and is fixedly connected to the output shaft coupling 18 of the feeding motor 16, and a controller 17 electrically connected to the feeding motor 16 is disposed on the upper side of the mounting box 7.

[0027] In this embodiment, the nozzle assembly includes a rear baffle 10 fixedly connected to the output end of the feeding cylinder 14. The rear baffle 10 has a discharge port that communicates with the feeding cylinder 14. The discharge port has the same inner diameter as the feeding cylinder 14. The front side of the rear baffle 10 is provided with an inner liner 11 and an outer liner 12. The inner liner 11 and the outer liner 12 cooperate to form an air supply chamber. The left, right and lower sides of the inner liner 11 are provided with a plurality of air supply holes 111. A wind box 9 assembly is provided between the nozzle assembly and the feeding assembly. An ignition device is provided on the rear baffle 10.

[0028] In the above embodiment, the air outlets on the left and right sides of the inner liner 11 are arranged tangentially to the inner liner 11 and tilted upwards at 15-35° to form a vortex-shaped oxygen supply flow, thereby improving secondary combustion efficiency and reducing smoke and dust emissions.

[0029] In this embodiment, the ignition device includes an ignition rod mounting seat disposed on the rear side of the rear baffle 10, an ignition rod is disposed in the ignition rod mounting seat, and the ignition end of the ignition rod extends out of the front side of the rear baffle 10.

[0030] In this embodiment, the air box 9 assembly includes an air box 9 disposed between the rear baffle 10 and the mounting box 7. The air box 9 is connected to the air supply cavity. A blower is disposed inside the air box 9. A baffle plate 27 is disposed on the outer side of the air box 9.

[0031] In this embodiment, the bellows 9 has symmetrical maintenance openings on its left and right sides, and a baffle 10 is detachably connected to the maintenance opening.

[0032] In this embodiment, the ash-pushing assembly includes an electric push rod 19 disposed in the mounting box 7. The output end of the electric push rod 19 is provided with a push rod 20. The end of the push rod 20 away from the electric push rod 19 is provided with a mounting plate 21. Two push rods 25 are symmetrically arranged on the front side of the mounting plate 21. Two travel guide sleeves 26 are symmetrically arranged on the rear baffle 10. The two push rods 25 are slidably connected in the two travel guide sleeves 26 respectively. The ends of the two push rods 25 can extend through the travel guide sleeves 26 to the inner side of the inner liner 11. A push-pull rod 22 is slidably connected to the front side of the mounting plate 21. A ash-pushing rod 23 is provided at the front end of the push-pull rod 22. A ash-pushing plate 24 is provided at the end of the ash-pushing rod 23 away from the mounting plate 21. A rectangular opening 112 is opened on the front side of the inner liner 11 to allow the ash-pushing plate 24 to extend. An ash discharge port 13 is opened through the lower side of the inner liner 11. The ash-pushing plate 24 can move to close the ash discharge port 13.

[0033] When using the above embodiments, First, the staff pours the pellet fuel to be burned into the feed hopper 8. Then, the feed motor 16 is started through the small controller 17. Under the action of the coupling 18, the feeder drives the auger 15 to stir. The pellet fuel in the feed hopper 8 falls into the feed cylinder 14 under the action of gravity. When the auger 15 rotates, it can transport the pellet fuel in the feed cylinder 14 to the inside of the inner liner 11, which improves the working efficiency of the device when feeding and further ensures the practicality of the device when in use. After the pellet fuel is delivered to the inside of the inner liner 11, the operator controls the ignition rod on the rear baffle 10 via the controller 17 to ignite the pellet fuel. While the pellet fuel is burning, the operator starts the blower, which sends air through the air box 9 into the air supply chamber. Subsequently, the air inside the air supply chamber is ejected through the air supply holes 111 on the bottom of the inner liner 11, providing oxygen to the burning pellet fuel, promoting combustion, and improving the combustion efficiency. Subsequently, the combustible gases such as carbon monoxide and methane produced by the combustion of the pellet fuel can combine with the oxygen ejected from the left and right sides of the inner liner 11 for secondary combustion, thereby achieving the effect of smokeless combustion and increased calorific value. The smokeless combustion and increased calorific value can be achieved through secondary combustion. Due to more complete combustion, less ash is produced, and fewer maintenance is required.

[0034] In the above embodiment, during ash removal, the operator controls the electric push rod 19 to push forward via the controller 17. The push rod 20 drives the push rod 25 and the mounting plate 21 to move forward. When the electric push rod 19 reaches a stroke of 110mm, the mounting plate 21 reaches its stroke on the push-pull rod 22, enabling the mounting plate 21 to push the push-pull rod 22 forward. Subsequently, the electric push rod 19 continues to push the push rod 20 and the mounting plate 21 forward by 70mm, causing the ash-pushing plate 24 to extend from the rectangular opening 112 on the front side of the inner liner 11. At this time, the ash-supporting plate no longer closes the ash leakage hole, and the furnace ash that falls from the inner liner 11 into the outer liner 12 can be blown out through the ash leakage hole under the action of the blower, realizing the automatic ash removal function, improving the ash removal efficiency of the device, and further ensuring the reliability of the device during use. The push rod 25 has a stroke of 180mm. During the forward movement of the push rod 20, the push rod 25 can pass through the stroke guide sleeve 26 and enter the inner side of the inner liner 11 to loosen the pellet fuel inside the inner liner 11. It also pushes the ash and coking material burning inside the inner liner 11 forward, thereby realizing the functions of loosening fuel, pushing ash and pushing coking. It truly achieves no coking, and even the worst fuel can be used. It improves the versatility of pellet fuel when in use. Through the functions of pushing ash, loosening material and pushing coking, it truly achieves maintenance-free operation. It only needs to be cleaned once a year before or after use, which greatly reduces the user's maintenance costs.

[0035] Example 2 differs from Example 1 in that: Based on Example 1, Example 2 arranges a dust sensor and a carbon monoxide sensor on the upper end of the inner side of the inner liner 11. The controller 17 is equipped with an air volume adjustment module based on a PID algorithm. This air volume adjustment module is adapted to the blower and electrically connected to the blower. When the concentration of carbon monoxide or soot exceeds the preset threshold, the controller 17 first increases the secondary air volume of the blower through the PID algorithm to promote secondary combustion. If the flue gas parameters do not drop within a short time after adjusting the secondary air volume, it is judged that there may be coking or fuel blockage. At this time, the controller 17 controls the electric push rod 19 to move and executes the ash pushing and cleaning procedure after the push rod 20 moves. To avoid the impact of the ash removal process on flame stability, the controller 17 is set with "temperature window" and "air volume window" rules, that is, the strong ash removal action is only triggered when the furnace temperature is within the safe range and the impact of the push rod 20 action on combustion can be compensated by the blower. The above embodiments, through real-time monitoring and closed-loop control, can detect combustion anomalies at an early stage and take corrective actions, reduce excessive ash removal and unnecessary push rod 20 movements, extend equipment life and further reduce emissions.

[0036] The present invention reduces the average PM value by 30% and the average carbon monoxide value by 25% under the same fuel and load conditions compared to the transmission pellet burner. From the above data, it can be concluded that the present invention achieves a significant improvement in emission control. Furthermore, the present invention does not require manual shutdown and ash cleaning during continuous 72-hour operation, while the transmission pellet burner requires manual ash cleaning once every six hours of continuous operation. From this data, it can be concluded that the automatic ash cleaning machine of the present invention with double push rod 20 structure improves the reliability of continuous operation.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic ash-cleaning, coking-free, smokeless combustion-aiding pellet burner, characterized in that: include: The mounting base assembly is used for the overall support and transportation of the pellet burner; A feeding assembly for conveying pellet fuel, the feeding assembly being located on a mounting base assembly; A burner assembly for burning pellet fuel supplied by the feeding assembly, the burner assembly being located at the output end of the feeding assembly; The ash-pushing assembly is used to loosen the pellet fuel inside the burner and push out the ash from the burner after the pellet fuel has burned.

2. The automatic ash-removing, coking-free, smokeless combustion-aiding pellet burner according to claim 1, characterized in that: The mounting base assembly includes an upper support frame (1) and a lower support frame (2). The upper support frame (1) and the lower support frame (2) are connected and fixed by four support connecting pipes (3) arranged in a rectangular array. The lower support frame (2) has four casters (6) arranged in a rectangular array on its lower side. An adjustment component for adjusting the height is provided between the lower support frame (2) and the casters (6).

3. The automatic ash-removing, coking-free, smokeless combustion-aiding pellet burner according to claim 2, characterized in that: The adjustment assembly includes a threaded post (4) that is threaded through the lower support frame (2), a caster wheel (6) that is fixedly connected to the lower end of the threaded post (4), and a fixing nut (5) that is threaded through the threaded post (4) on both the upper and lower sides of the lower support frame (2). The fixing nut (5) is in contact with the upper and lower sides of the lower support frame (2).

4. The automatic ash-cleaning, coking-free, smokeless combustion-supporting pellet burner according to claim 2, characterized in that: The feeding assembly includes a mounting box (7) on the upper side of the upper support frame (1), a conveying cylinder is provided inside the mounting box (7), an auger (15) is rotatably connected inside the conveying cylinder, a material box (8) is provided on the upper side of the mounting box (7), the lower end of the material box (8) is connected to the rear end of the circumferential side of the conveying cylinder, and a driving assembly for driving the auger (15) to rotate is provided inside the mounting box (7).

5. The automatic ash-removing, coking-free, smokeless combustion-aiding pellet burner according to claim 4, characterized in that: The drive assembly includes a feeding motor (16) installed in the hopper (8), the rear end of the auger (15) extends out of the feeding cylinder (14) and is fixedly connected to the output shaft coupling (18) of the feeding motor (16), and a small controller (17) electrically connected to the feeding motor (16) is provided on the upper side of the mounting box (7).

6. The automatic ash-removing, coking-free, smokeless combustion-aiding pellet burner according to claim 5, characterized in that: The burner assembly includes a rear baffle (10) fixedly connected to the output end of the feeding cylinder (14). The rear baffle (10) has a discharge port that communicates with the feeding cylinder (14). The discharge port has the same inner diameter as the feeding cylinder (14). The front side of the rear baffle (10) is provided with an inner liner (11) and an outer liner (12). The inner liner (11) and the outer liner (12) cooperate to form an air supply chamber. The left, right and lower sides of the inner liner (11) are provided with multiple air supply holes (111). A wind box (9) assembly is provided between the burner assembly and the feeding assembly. An ignition device is provided on the rear baffle (10).

7. The automatic ash-removing, coking-free, smokeless combustion-aiding pellet burner according to claim 6, characterized in that: The ignition device includes an ignition rod mounting seat disposed on the rear side of the rear baffle (10), an ignition rod is disposed in the ignition rod mounting seat, and the ignition end of the ignition rod extends out of the front side of the rear baffle (10).

8. The automatic ash-removing, coking-free, smokeless combustion-supporting pellet burner according to claim 6, characterized in that: The air box (9) assembly includes an air box (9) disposed between the rear baffle (10) and the mounting box (7), the air box (9) is connected to the air supply chamber, a blower is disposed inside the air box (9), and a baffle plate (27) is disposed on the outer side of the air box (9).

9. The automatic ash-removing, coking-free, smokeless combustion-aiding pellet burner according to claim 6, characterized in that: The bellows (9) has symmetrical maintenance openings on its left and right sides, and a baffle (10) is detachably connected to the maintenance opening.

10. The automatic ash-cleaning, coking-free, smokeless combustion-supporting pellet burner according to claim 6, characterized in that: The ash pushing assembly includes an electric push rod (19) housed in a mounting box (7). A push rod (20) is provided at the output end of the electric push rod (19). A mounting plate (21) is provided at the end of the push rod (20) away from the electric push rod (19). Two push rods (25) are symmetrically arranged on the front side of the mounting plate (21). Two travel guide sleeves (26) are symmetrically arranged on the rear baffle (10). The two push rods (25) are slidably connected within the two travel guide sleeves (26). The ends of the two push rods (25) are... The push-pull rod (22) is slidably connected to the front side of the mounting plate (21), and a ash-pulling rod (23) is provided at the front end of the push-pull rod (22). A ash-pulling plate (24) is provided at the end of the ash-pulling rod (23) away from the mounting plate (21). A rectangular opening (112) is provided on the front side of the inner liner (11) to allow the ash-pulling plate (24) to extend out. A ash discharge port (13) is provided through the lower side of the inner liner (11). The ash-pulling plate (24) can move to close the ash discharge port (13).

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