A low-nitrogen biomass burner

Abstract

A low-nitrogen biomass burner is disclosed in the present invention, which relates to the technical field of burners; specifically, it includes a base, on the top of the base, a combustion tank, a slag discharge box and a frame are successively installed. A screw feeder is installed on the top of the frame, and a cloth pipe is installed between the outlet of the screw feeder and the combustion tank. A movable flap is hinged to the bottom end of the cloth pipe. A blower is installed inside the frame, igniters are installed on both sides inside the combustion tank, and an air box mechanism is installed on the top of the slag discharge box. In the present invention, by using the internal blowing air flow and the injection power of the cloth pipe, the biomass particles inside the burner move violently, fully contact with oxygen during combustion, improve the combustion efficiency, and the combustible gas formed by the combustion of the biomass particles and the incoming air rise in a spiral shape, further improving the combustion efficiency and reducing the formation of combustion waste gas.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, and particularly to a low-nitrogen biomass burner. Background Art

[0002] Biomass energy refers to the energy converted from plants, feces and urban and rural organic wastes in nature. Generally, it is mainly agricultural and forestry waste (such as straw, sawdust, bagasse, rice bran, etc.). A biomass burner is a biomass semi-gasification automatic control burner, a biomass high-temperature pyrolysis burner using organic biomass such as biomass pellets as fuel, and is generally divided into two models: air-cooled biomass burners and water-cooled biomass burners.

[0003] When the biomass burner works as a whole, the feeding auger of the burner is electrified to perform a pre-feeding action. After the feeding is completed, the blower and the ignition rod are turned on to perform an ignition action. After successful ignition, it enters the large-fire feeding stage. The large-fire feeding mainly consists of two parts: feeding and air supply. In the feeding process of traditional burners, many biomass fuel particles are stacked together, resulting in insufficient combustion of the fuel located in the center. Moreover, with the accumulation of ash, the combustion effect decreases.

[0004] In view of this, the present invention provides a low-nitrogen biomass burner to solve the technical problems existing in the above-mentioned prior art. Summary of the Invention

[0005] Based on the technical problems existing in the background art, the present invention proposes a low-nitrogen biomass burner.

[0006] A low-nitrogen biomass burner proposed by the present invention includes a base. A combustion tank, a slag discharge box and a frame are sequentially installed on the top of the base. A screw feeder is installed on the top of the frame, and a cloth pipe is installed between the outlet of the screw feeder and the combustion tank. The bottom pipe orifice of the cloth pipe is hinged with a movable flap. A blower is installed inside the frame. Igniters are installed on both sides inside the combustion tank. A wind box mechanism is installed on the top of the slag discharge box, and a slag discharge mechanism extending into the slag discharge box is installed inside the wind box mechanism. A plurality of slag discharge scrapers are installed on the outer side of the bottom of the slag discharge mechanism. Arc-shaped air-cooled cavities are installed on both sides inside the slag discharge box;

[0007] A support frame is installed inside the combustion tank, and a burner is rotatably installed inside the support frame. An air supplement ring sleeve is rotatably installed at the outer bottom of the burner, and a plurality of cleaning scrapers are installed at the bottom of the burner. A slag discharge port is provided at the connection between the combustion tank and the slag discharge box, and a transmission chain is provided inside the slag discharge port. The two ends of the transmission chain are respectively sleeved on the outer sides of the burner and the slag discharge mechanism. A support ring is also installed inside the combustion tank, and the outer top of the combustion tank is rotatably connected to the support ring;

[0008] One side of the combustion tank is equipped with a detachable flame nozzle, and a secondary air supplement sleeve is installed on the outside of the flame nozzle. A secondary air supplement pipe is installed between the secondary air supplement sleeve and the air-cooling cavity. An air inflation pipe is arranged between the side of the air box mechanism and the blower, and an air-cooling pipe, an air supplement pipe, and a combustion gas pipe are sequentially installed between the side of the air box mechanism and the air-cooling cavity, the cloth pipe, and the air supplement ring sleeve through electromagnetic valves.

[0009] Preferably in the present invention, the slag discharge mechanism includes a first cooling shaft, and a plurality of spiral air blades are arranged on the outer side of the upper end of the first cooling shaft. A first heat conduction seat and a first transmission wheel are sequentially arranged at the bottom of the first cooling shaft.

[0010] Preferably in the present invention, the slag discharge mechanism further includes a first cavity arranged inside the first cooling shaft, and the inside of the first cavity is in a negative pressure state. The inside of the first cavity is filled with a first heat exchange medium, and a plurality of condensation columns are arranged at the top end inside the first cavity.

[0011] Preferably in the present invention, the slag discharge mechanism includes a second cooling shaft, and multiple layers of wind wheel blades are arranged on the outer side of the upper end of the second cooling shaft. Multiple staggered air cavities adapted to the wind wheel blades are arranged inside the air box mechanism. A second heat conduction seat and a second transmission wheel are sequentially arranged at the bottom of the second cooling shaft.

[0012] Preferably in the present invention, the slag discharge mechanism further includes a second cavity arranged inside the second cooling shaft, and the inside of the second cavity is in a negative pressure state. The inside of the second cavity is filled with a second heat exchange medium. One end of the wind wheel blade extends into the second cavity to form multiple layers of condensation fin plates, and a metal mesh layer is arranged between each layer of condensation fin plates. A transparent structure collection cover is arranged at the top of the second cooling shaft.

[0013] Preferably in the present invention, the flame nozzle is provided with a detachable secondary combustion section and a flame spraying section, and an inner pipe is arranged inside the flame spraying section.

[0014] Preferably in the present invention, a plurality of spirally distributed flame guiding plates are arranged between the flame spraying section and the inner pipe, and spirally distributed guiding grooves are arranged on the inner wall of the inner pipe.

[0015] Preferably in the present invention, the secondary air supplement sleeve includes an annular shell cover, and annularly distributed first jet nozzles and second jet nozzles are arranged on the inner wall of the annular shell cover, and the first jet nozzles and the second jet nozzles are respectively located inside and outside the pipe orifice of the inner pipe.

[0016] Preferably, in the present invention, the burner includes a collection hood, and a transmission part is arranged at the bottom of the collection hood. An air inlet hole is arranged at the connection between the transmission part and the air supplement ring sleeve. A air supplement cavity is arranged inside the collection hood, and a plurality of obliquely distributed air jet holes are arranged at the top of the air supplement cavity. A plurality of spirally distributed air flow channels are arranged inside the surface wall of the collection hood, and a plurality of oblique nozzles distributed on the air flow channels are arranged on the inner wall of the collection hood.

[0017] Preferably, in the present invention, a convex edge is arranged at the outer top of the burner, and a plurality of ash discharge holes are arranged on the surface of the convex edge. A plurality of grinding holes are arranged on the surface of the support ring.

[0018] Compared with the prior art, the present invention provides a low-nitrogen biomass burner, which has the following beneficial effects:

[0019] In the present invention, biomass pellet fuel is ejected inside the burner from the cloth pipe under the blowing of a blower, driving the burner to rotate. Secondly, compared with traditional burners, in the present invention, an air supplement ring sleeve is arranged at the bottom of the burner, and the burner is designed in a bowl-shaped structure. Compressed air is distributed from the inner wall and bottom of the burner, causing the burner to rotate further during operation. Then, by using the internal jet air flow and the jet power of the cloth pipe, the biomass pellets inside the burner move violently, making full contact with oxygen during combustion, improving the combustion efficiency. Moreover, the combustible gas formed by the combustion of biomass pellets rises spirally with the incoming air, further improving the combustion efficiency and reducing the formation of combustion waste gas. Secondly, the gas inhaled by the blower enters the inside of the air box mechanism, driving the burner and the slag discharge mechanism to rotate. The ash slag is transferred from the combustion tank to the slag discharge box by the cleaning scraper. The ash slag inside the slag discharge box is cooled by the air cooling cavity and transferred to the outside by the slag discharge scraper, facilitating the cleaning work of the ash slag. And the remaining heat of the ash slag is used to heat the inhaled air, effectively reducing the heat loss of the burner and achieving a good energy-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a low-nitrogen biomass burner proposed by the present invention;

[0021] Figure 2 is a partial side view structural diagram of a low-nitrogen biomass burner proposed by the present invention;

[0022] Figure 3 is an enlarged structural diagram of the flame nozzle of a low-nitrogen biomass burner proposed by the present invention;

[0023] Figure 4 is a sectional view structural diagram of the flame nozzle of a low-nitrogen biomass burner proposed by the present invention;

[0024] Figure 5 Schematic structural diagram of a burner of a low-nitrogen biomass burner proposed by the present invention;

[0025] Figure 6 Schematic side view structural diagram of a burner of a low-nitrogen biomass burner proposed by the present invention;

[0026] Figure 7 Schematic partial bottom view structural diagram of a low-nitrogen biomass burner proposed by the present invention;

[0027] Figure 8 Schematic structural diagram of the air inlet hole distribution of a low-nitrogen biomass burner proposed by the present invention;

[0028] Figure 9 Schematic structural diagram of a slag discharging mechanism of a low-nitrogen biomass burner proposed in Embodiment 1 of the present invention;

[0029] Figure 10 Schematic structural diagram of a slag discharging mechanism of a low-nitrogen biomass burner proposed in Embodiment 2 of the present invention.

[0030] In the figure: 1 base, 2 slag scraping plate, 3 air-cooling chamber, 4 air box mechanism, 401 inflation air pipe, 402 combustion gas pipe, 403 supplementary air pipe, 404 air-cooling pipe, 5 frame, 6 blower, 7 feeding pipe, 8 auger feeder, 9 movable flap, 10 igniter, 11 secondary air supplement sleeve, 1101 annular shell cover, 1102 first jet nozzle, 1103 second jet nozzle, 12 flame spray pipe, 1201 secondary combustion section, 1202 flame spraying section, 1203 inner pipe, 1204 guiding groove, 1205 flame guiding plate, 13 burner, 1301 collection hood, 1302 transmission part, 1303 air inlet hole, 1304 ash discharge hole, 1305 air supplement chamber, 1306 jet hole, 1307 air flow passage, 1308 inclined nozzle, 14 support ring, 15 support frame, 16 combustion tank, 17 cleaning blade, 18 air supplement ring sleeve, 19 transmission chain, 20 slag discharge box, 21 secondary air supplement pipe, 22 slag discharging mechanism, 2211 first cooling shaft, 2212 first heat conduction seat, 2213 first driving wheel, 2214 spiral air blade, 2215 condensation column, 2216 first cavity, 2217 first heat exchange medium, 2221 second cooling shaft, 2222 second heat conduction seat, 2223 second driving wheel, 2224 wind wheel blade, 2225 metal mesh layer, 2226 second cavity, 2227 second heat exchange medium, 2228 collection hood. Detailed implementation manners

[0031] The embodiments of the present patent will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present patent and should not be construed as a limitation of the present patent. Embodiment

[0032] Referring to Figure 1-9 , a low-nitrogen biomass burner includes a base 1. A combustion tank 16, a slag discharge box 20, and a frame 5 are sequentially installed on the top of the base 1. A screw feeder 8 is installed on the top of the frame 5, and a cloth pipe 7 is installed between the outlet of the screw feeder 8 and the combustion tank 16. A movable flap 9 is hinged to the bottom pipe orifice of the cloth pipe 7. A blower 6 is installed inside the frame 5. Igniters 10 are installed on both sides inside the combustion tank 16. An air box mechanism 4 is installed on the top of the slag discharge box 20, and a slag discharge mechanism 22 extending into the slag discharge box 20 is installed inside the air box mechanism 4. A plurality of slag discharge scrapers 2 are installed on the outer side of the bottom of the slag discharge mechanism 22. Arc-shaped air-cooling cavities 3 are installed on both sides inside the slag discharge box 20;

[0033] A support frame 15 is installed inside the combustion tank 16, and a burner 13 is rotatably installed inside the support frame 15. An air supplement ring sleeve 18 is rotatably installed at the outer bottom of the burner 13, and a plurality of cleaning scrapers 17 are installed at the bottom of the burner 13. A slag discharge port is provided at the connection between the combustion tank 16 and the slag discharge box 20, and a transmission chain 19 is provided inside the slag discharge port. Both ends of the transmission chain 19 are respectively sleeved on the outer sides of the burner 13 and the slag discharge mechanism 22. A support ring 14 is also installed inside the combustion tank 16, and the outer top of the combustion tank 16 is rotatably connected to the support ring 14;

[0034] A detachable flame nozzle 12 is installed on one side of the combustion tank 16, and a secondary air supplement sleeve 11 is installed on the outer side of the flame nozzle 12. A secondary air supplement pipe 21 is installed between the secondary air supplement sleeve 11 and the air-cooling cavity 3. An inflation air pipe 401 is provided between the side of the air box mechanism 4 and the blower 6, and an air-cooling pipe 404, a gas supplement pipe 403, and a combustion gas pipe 402 are sequentially installed between the side of the air box mechanism 4 and the air-cooling cavity 3, the cloth pipe 7, and the air supplement ring sleeve 18 through solenoid valves.

[0035] In the present invention, biomass pellet fuel is ejected from the cloth pipe 7 under the air blowing of the blower 6 inside the burner 13, driving the burner 13 to rotate. Secondly, compared with the traditional burner, in the present invention, an air supplement ring sleeve 18 is provided at the bottom of the burner 13, and the burner 13 is designed in a bowl-shaped structure. Compressed air is distributed from the inner wall and bottom of the burner 13, so that the burner 13 further rotates during operation. Then, by utilizing the internal jet airflow and the ejection power of the cloth pipe 7, the biomass pellets inside the burner 13 move violently, fully contact with oxygen during combustion, improve the combustion efficiency, and the combustible gas formed by the combustion of the biomass pellets rises spirally with the incoming air, further improving the combustion efficiency and reducing the formation of combustion waste gas. Secondly, the gas inhaled by the blower 6 enters the inside of the air box mechanism 4, thereby driving the burner 13 and the slag discharge mechanism 22 to rotate. The ash slag is transferred from the combustion tank 16 to the slag discharge box 20 through the cleaning blade 17. The ash slag inside the slag discharge box 20 is cooled by the air cooling chamber 3 and transferred to the outside by the slag discharge scraper 2, facilitating the cleaning work of the ash slag, and using the residual heat of the ash slag to heat the inhaled air, effectively reducing the heat loss of the burner 16 and achieving a good effect of effective energy conservation.

[0036] As a further scheme in the present invention, the slag discharge mechanism 22 includes a first cooling shaft 2211, and a plurality of spiral air blades 2214 are arranged on the outer side of the upper end of the first cooling shaft 2211. A first heat conduction seat 2212 and a first transmission wheel 2213 are sequentially arranged at the bottom of the first cooling shaft 2211. The slag discharge mechanism 22 is divided into two sections, one section is inside the slag discharge box 20, and one section is inside the air box mechanism 4. After the compressed air in the blower 6 enters the inside of the air box mechanism 4, the wind blows the spiral air blades 2214 to drive the first cooling shaft 2211 to rotate. At the same time, when the ash slag enters the inside of the slag discharge box 20, through the action of the first heat conduction seat 2212, the heat is transferred to the inside of the air box mechanism 4 to preheat the blown air and effectively cool the ash slag, reasonably utilizing the waste heat recovery of the ash slag and saving energy and reducing consumption.

[0037] As a further solution in the present invention, the slag discharging mechanism 22 further includes a first cavity 2216 provided inside the first cooling shaft 2211. The inside of the first cavity 2216 is in a negative pressure state. The first cavity 2216 is filled with a first heat exchange medium 2217. A plurality of condensation columns 2215 are provided at the top end inside the first cavity 2216. The first heat exchange medium 2217 exchanges heat and evaporates inside the first heat conduction seat 2212. When the steam enters the top end of the first cavity 2216, it is effectively cooled by the incoming cold air, and then condenses into a liquid state, adheres to the condensation columns 2215 to form liquid beads, and under the action of centrifugal force, forms a liquid film along the inner wall of the first cavity 2216 and flows downward and is evaporated again. By using the evaporation heat absorption at the bottom and the condensation heat release at the upper end, the heat exchange between the upper and lower sections of the slag discharging mechanism 22 is accelerated, the cooling speed of the ash slag is accelerated, and the preheating efficiency of the cold air is improved, further enhancing the energy-saving and consumption-reducing effect of the burner.

[0038] As a further solution in the present invention, the flame nozzle 12 is provided with a detachable secondary combustion section 1201 and a flame spraying section 1202. An inner tube 1203 is provided inside the flame spraying section 1202. In the present invention, the burner nozzle is designed to have a detachable secondary combustion section 1201 and a flame spraying section 1202, which helps to maintain the nozzle section of the burner, and different types and sizes of flame spraying sections 1202 can be replaced according to the connected equipment to maximize the heat utilization. Secondly, the setting of the inner tube 1203 makes the center of the flame columnar and the outside annular when the flame is ejected. The annular flame is used to protect the central flame column, extend the flame spraying distance under the same combustion state, effectively enhance the heating intensity of the burner, and increase the combustion power.

[0039] As a further solution in the present invention, a plurality of spiral distribution flame guiding plates 1205 are provided between the flame spraying section 1202 and the inner tube 1203, and spiral distribution guiding grooves 1204 are provided on the inner wall of the inner tube 1203. After the flame is divided into inner and outer layers, the inner and outer layer flames form a double-layer spiral flame under the action of the spiral distribution flame guiding plates 1205 and the guiding grooves 1204, stirring the surrounding air and sucking it in, further enhancing the efficiency of secondary combustion, increasing the extension length of the flame, and further improving the heating intensity of the flame.

[0040] As a further solution in the present invention, the secondary air supply sleeve 11 includes an annular shell cover 1101, and annularly distributed first air jet nozzles 1102 and second air jet nozzles 1103 are provided on the inner wall of the annular shell cover 1101. The first air jet nozzles 1102 and the second air jet nozzles 1103 are respectively located inside and outside the pipe orifice of the inner tube 1203. By using the first air jet nozzles 1102 and the second air jet nozzles 1103, the combustion-supporting air required for secondary combustion is respectively blown into the inside and outside of the inner tube 1203, increasing the flame spraying intensity and at the same time enhancing the flame stratification effect.

[0041] As a further aspect of the present invention, the burner 13 includes a collection hood 1301, and a transmission part 1302 is provided at the bottom of the collection hood 1301. An air inlet hole 1303 is provided at the connection between the transmission part 1302 and the air supplement ring sleeve 18. An air supplement cavity 1305 is provided inside the collection hood 1301, and a plurality of obliquely distributed air jet holes 1306 are provided at the top of the air supplement cavity 1305. A plurality of spirally distributed air flow channels 1307 are provided inside the wall of the collection hood 1301, and a plurality of oblique nozzles 1308 distributed on the air flow channels 1307 are provided on the inner wall of the collection hood 1301. When the biomass pellet fuel enters, it impacts the oblique nozzles 1308, increasing the power for the rotation of the collection hood 1301, and when colliding, the pellet fuel rebounds, enhancing the movement effect of the pellet fuel. And when air is ejected from the bottom and the inner wall, a multi-layer spiral air flow vortex is formed in the collection hood 1301, thereby increasing the flame and air flow effect around the biomass pellet fuel, effectively improving the combustion efficiency, reducing the formation of combustion by-products, and with the help of the air flow vortex, taking away the ash generated by combustion, achieving the slag cleaning effect inside the burner 13.

[0042] As a further aspect of the present invention, a convex edge is provided at the outer top of the burner 13, and a plurality of ash discharge holes 1304 are provided on the surface of the convex edge. A plurality of grinding holes are provided on the surface of the support ring 14. When the ash generated by combustion is stirred up by the flame air wave and diffuses to the outside of the burner 13, under the rotational grinding between the ash discharge holes 1304 and the support ring 14, it deposits at the bottom of the combustion tank 16, achieving the ash collection and separation work, separating the bottom ash from the upper-layer flame, reducing the dust content in the flame, and accelerating the ash separation work. Embodiment

[0043] Refer to Figure 1-8 and Figure 10 For a low-nitrogen biomass burner, the slag discharge mechanism 22 includes a second cooling shaft 2221, and a multi-layer wind wheel blade 2224 is arranged on the outer side of the upper end of the second cooling shaft 2221. A multi-layer staggered air cavity adapted to the wind wheel blade 2224 is arranged inside the air box mechanism 4. A second heat conduction seat 2222 and a second transmission wheel 2223 are sequentially arranged at the bottom of the second cooling shaft 2221. The slag discharge mechanism 22 is divided into two sections, one section is inside the slag discharge box 20, and one section is inside the air box mechanism 4. The second heat conduction seat 2222 at the bottom is covered in the hot ash, and transfers the heat layer by layer to the wind wheel blade 2224. After the compressed air in the blower 6 enters the inside of the air box mechanism 4, it passes through the multi-layer staggered air cavities and blows the wind wheel blade 2224 in sequence, enhancing the heat exchange area and strengthening the driving effect of the wind force at the same time.

[0044] The slag discharging mechanism 22 further includes a second cavity 2226 arranged inside the second cooling shaft 2221, and the inside of the second cavity 2226 is in a negative pressure state. The inside of the second cavity 2226 is filled with a second heat exchange medium 2227. One end of the wind wheel blade 2224 extends into the second cavity 2226 to form multiple layers of condensation fins, and a metal mesh layer 2225 is arranged between each layer of condensation fins. A transparent structure collection cover 2228 is arranged at the top of the second cooling shaft 2221. The second heat exchange medium 2227 exchanges heat with the ash slag and evaporates inside the second heat conduction seat 2222. When the steam enters the second cavity 2226, it is cooled layer by layer and effectively cooled by the incoming cold air, and then condenses into a liquid state. Then, under the action of the metal mesh layer 2225, dense water droplets that fall are formed. After flowing downward, they are evaporated again. By using the evaporation heat absorption at the bottom and the condensation heat release at the upper end, the heat exchange between the upper and lower sections of the slag discharging mechanism 22 is accelerated, the cooling speed of the ash slag is accelerated, and the preheating efficiency of the cold air is improved, further enhancing the energy-saving and consumption-reducing effect of the burner. Secondly, the user can judge the heat exchange effect of the slag discharging mechanism 22 and the cooling speed of the ash slag by observing the distribution density of the water droplets formed inside the collection cover 2228, effectively judge the operating state of the burner, and improve the convenience of operating the burner.

[0045] During use, the biomass pellet fuel is sprayed into the interior of the burner 13 from the cloth pipe 7 under the blowing of the blower 6, driving the burner 13 to rotate. Secondly, compared with the traditional burner, in the present invention, an air supplementing ring sleeve 18 is arranged at the bottom of the burner 13, and the burner 13 is designed in a bowl-shaped structure. Compressed air is distributed from the inner wall and bottom of the burner 13, so that the burner 13 rotates further during operation. Then, by using the internal blowing air flow and the jet power of the cloth pipe 7, the biomass pellets inside the burner 13 move violently, fully contact with oxygen during combustion, improve the combustion efficiency, and the combustible gas formed by the combustion of the biomass pellets rises in a spiral shape with the incoming air, further improving the combustion efficiency and reducing the formation of combustion waste gas. Secondly, the gas inhaled by the blower 6 enters the interior of the air box mechanism 4, thereby driving the burner 13 and the slag discharging mechanism 22 to rotate. The ash slag is transferred from the combustion tank 16 to the slag discharging box 20 through the cleaning blade 17, and the ash slag inside the slag discharging box 20 is cooled by the air cooling cavity 3 and transferred to the outside by the slag discharging scraper 2.

[0046] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present invention.

Claims

1. A low-nitrogen biomass burner, comprising a base (1), on the top of the base (1), a combustion tank (16), a slag discharge box (20) and a frame (5) are successively installed. On the top of the frame (5), an auger feeder (8) is installed, and a cloth pipe (7) is installed between the outlet of the auger feeder (8) and the combustion tank (16). A movable flap (9) is hinged to the bottom pipe orifice of the cloth pipe (7). A blower (6) is installed inside the frame (5). Igniters (10) are installed on both sides inside the combustion tank (16), and it is characterized in that, A wind box mechanism (4) is installed on the top of the slag discharge box (20), and a slag discharge mechanism (22) extending into the interior of the slag discharge box (20) is installed inside the wind box mechanism (4). A plurality of slag discharge scrapers (2) are installed on the outer side of the bottom of the slag discharge mechanism (22). Arc-shaped air-cooling cavities (3) are installed on both sides inside the slag discharge box (20). A support frame (15) is installed inside the combustion tank (16), and a burner (13) is rotatably installed inside the support frame (15). An air supplementing ring sleeve (18) is rotatably installed at the outer bottom of the burner (13), and a plurality of cleaning blades (17) are installed at the bottom of the burner (13). A slag discharge port is provided at the connection between the combustion tank (16) and the slag discharge box (20), and a transmission chain (19) is provided inside the slag discharge port. The two ends of the transmission chain (19) are respectively sleeved on the outer sides of the burner (13) and the slag discharge mechanism (22). A support ring (14) is also installed inside the combustion tank (16), and the outer top of the combustion tank (16) is rotatably connected to the support ring (14). A detachable flame nozzle (12) is installed on one side of the combustion tank (16), and a secondary air supplementing sleeve (11) is installed on the outer side of the flame nozzle (12). A secondary air supplementing pipe (21) is installed between the secondary air supplementing sleeve (11) and the air-cooling cavity (3). An air inflation pipe (401) is provided between the side surface of the wind box mechanism (4) and the blower (6), and an air-cooling pipe (404), an air supplementing pipe (403), and a combustion gas pipe (402) are sequentially installed between the side surface of the wind box mechanism (4) and the air-cooling cavity (3), the cloth pipe (7), and the air supplementing ring sleeve (18) through electromagnetic valves.

2. The low-nitrogen biomass burner according to claim 1, characterized in that, The slag discharge mechanism (22) includes a first cooling shaft (2211), and a plurality of spiral air blades (2214) are arranged on the outer side of the upper end of the first cooling shaft (2211). A first heat conduction seat (2212) and a first transmission wheel (2213) are sequentially arranged at the bottom of the first cooling shaft (2211).

3. The low-nitrogen biomass burner according to claim 2, characterized in that, The slag discharge mechanism (22) further includes a first cavity (2216) provided inside the first cooling shaft (2211), and the inside of the first cavity (2216) is in a negative pressure state. A first heat exchange medium (2217) is filled inside the first cavity (2216), and a plurality of condensation columns (2215) are arranged at the top end inside the first cavity (2216).

4. A low-nitrogen biomass burner according to claim 1, wherein, The slag discharge mechanism (22) includes a second cooling shaft (2221), and multiple layers of wind wheel blades (2224) are arranged on the outer side of the upper end of the second cooling shaft (2221). Multiple layers of staggered air cavities adapted to the wind wheel blades (2224) are provided inside the wind box mechanism (4). A second heat conduction seat (2222) and a second transmission wheel (2223) are sequentially arranged at the bottom of the second cooling shaft (2221).

5. A low-nitrogen biomass burner according to claim 4, characterized in that, The slag discharging mechanism (22) further includes a second cavity (2226) disposed inside the second cooling shaft (2221), and the inside of the second cavity (2226) is in a negative pressure state. The inside of the second cavity (2226) is filled with a second heat exchange medium (2227). One end of the wind turbine blade (2224) extends into the second cavity (2226) to form multiple layers of condensation fin plates, and a metal mesh layer (2225) is provided between each layer of condensation fin plates. A transparent structure collection cover (2228) is arranged at the top of the second cooling shaft (2221).

6. The low-nitrogen biomass burner according to claim 1, wherein The flame nozzle (12) is provided with a detachable secondary combustion section (1201) and a flame spraying section (1202), and an inner tube (1203) is arranged inside the flame spraying section (1202).

7. The low-nitrogen biomass burner according to claim 6, characterized in that, A plurality of spirally distributed flame guiding plates (1205) are arranged between the flame spraying section (1202) and the inner tube (1203), and a spirally distributed guiding groove (1204) is arranged on the inner wall of the inner tube (1203).

8. A low-nitrogen biomass burner according to claim 7, characterized in that The secondary air supply sleeve (11) includes an annular shell cover (1101), and an annularly distributed first jet nozzle (1102) and a second jet nozzle (1103) are arranged on the inner wall of the annular shell cover (1101), and the first jet nozzle (1102) and the second jet nozzle (1103) are respectively located inside and outside the nozzle opening of the inner tube (1203).

9. The low-nitrogen biomass burner according to claim 1, wherein, The burner (13) includes a collection cover (1301), and a transmission part (1302) is arranged at the bottom of the collection cover (1301). An air inlet hole (1303) is arranged at the connection between the transmission part (1302) and the air supply ring sleeve (18). An air supply cavity (1305) is arranged inside the collection cover (1301), and a plurality of obliquely distributed air jet holes (1306) are arranged at the top of the air supply cavity (1305). A plurality of spirally distributed air flow channels (1307) are arranged inside the surface wall of the collection cover (1301), and a plurality of obliquely arranged nozzles (1308) distributed on the air flow channels (1307) are arranged on the inner wall of the collection cover (1301).

10. A low-nitrogen biomass burner according to claim 9, characterized in that, A convex edge is arranged at the outer top of the burner (13), and a plurality of ash discharge holes (1304) are arranged on the surface of the convex edge. A plurality of grinding holes are arranged on the surface of the support ring (14).

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