Biomass boiler denitrification combustion device

Abstract

The present application discloses a biomass boiler denitrification combustion device, which relates to the field of boiler combustion equipment; the present application includes a boiler body, an inner wall of which is provided with a mesh plate, an inner wall of the boiler body and a mounting plate located above the mesh plate, and a rotating rod rotatably provided on the mounting plate; the present application uses the mesh plate to rotatably set a rotating shaft above the mesh plate and a paddle plate set on the rotating shaft, and uses the wind force generated by the blower to blow biomass fuel onto the mesh plate. The airflow will also impact the paddle plate when blowing the material, and the rotating paddle plate is used to disperse the fuel blown into the boiler body. When the dispersed fuel falls downward, it will pass through the second conical mesh cylinder and the first conical mesh cylinder in sequence, thereby slowing down the falling speed of the biomass fuel, so that it can fully contact with the flame ignited by the gas, increase the combustion specific surface area of the biomass fuel and the flame combustion, and enable it to be fully burned, so as to reduce the nitrate content in the flue gas and improve the denitrification efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of boiler combustion equipment, and in particular to a denitrification combustion device for a biomass boiler. Background Art

[0002] Biomass fuel is made from agricultural and forestry waste (including straw, sawdust, bagasse, rice chaff, etc.) as raw materials, which is crushed, mixed, extruded, dried and other processes to form block or granular fuel. Biomass fuel is a new type of clean fuel with the characteristics of being renewable, clean and environmentally friendly. Biomass fuel is often used in boilers and burned in combination with gas.

[0003] When burning in an existing boiler, a feed pipe is generally provided to transport the fuel into the boiler through the feed pipe, and the fuel is burned in conjunction with a flame nozzle connected to the boiler. Since the biomass fuel is fed into the boiler from the feed pipe, the biomass fuel is relatively concentrated when entering the boiler, resulting in a smaller combustion surface area relative to the air and gas, a slower combustion heat release rate, and incomplete combustion. When the biomass fuel is not burned fully, the flue gas contains a large amount of NOx, CO, etc., that is, the denitrification is insufficient. Such substances will form acid rain when entering the atmosphere, and acid rain is very harmful to humans. Therefore, the present application proposes a denitrification combustion device for a biomass boiler. Summary of the Invention

[0004] The purpose of this application is to solve the problem of insufficient fuel combustion and insufficient denitrification in the flue gas of biomass fuel combustion in existing boilers. This application provides a biomass boiler denitrification combustion device.

[0005] In order to achieve the above-mentioned purpose, this application specifically adopts the following technical solutions:

[0006] Biomass boiler denitrification combustion device, including:

[0007] The boiler body has a mesh plate on its inner wall, a mounting plate is provided on the inner wall of the boiler body and above the mesh plate, a rotating rod is rotatably provided on the mounting plate, and a plurality of shift plates are provided in an array on the outer surface of the rotating rod in an annular arrangement, and the plurality of shift plates are in contact with and overlap the mesh plate;

[0008] A hopper, a bracket is provided on the outer surface of the boiler body, a blower is provided on the bracket, an air outlet of the blower is connected to a feed pipe of the boiler body, the connection port of the feed pipe and the boiler body corresponds to the dial plate, the hopper is provided on the bracket and the discharge end is connected to the feed pipe, and a flow regulating mechanism is provided at the discharge end of the hopper;

[0009] An air duct is coaxially arranged on the inner bottom wall of the boiler body, the outer surface of the air duct is provided with a plurality of air holes in an array, the bottom end of the air duct is connected to a gas pipe whose end is located outside the boiler body, the outer wall of the air duct is provided with a plurality of first conical mesh cylinders in an array, and the inner wall of the air duct is provided with an igniter corresponding to the gas pipe;

[0010] A plurality of second conical mesh cylinders are arranged in an array on the inner wall of the boiler body and are staggered with the plurality of first conical mesh cylinders.

[0011] Furthermore, the air guide tube includes:

[0012] The first cylinder is fixedly mounted on the inner bottom wall of the boiler body, the end of the first cylinder is rotatably connected to the second cylinder, the first conical mesh cylinder is arranged on the second cylinder, and the gas pipe is connected to the first cylinder;

[0013] The shaft is coaxially connected to the second cylinder, and an impeller is provided at one end of the shaft located in the first cylinder.

[0014] Furthermore, the first cylinder is connected to a branch pipe with an end portion located outside the boiler body, and the branch pipe is used to transport high-speed oxygen.

[0015] Furthermore, a spiral plate is connected between the inner wall of the second cylinder and the outer wall of the shaft.

[0016] Furthermore, the inner wall of the boiler body is arrayed with a plurality of connecting plates, the mesh plate is arrayed with a plurality of vertical rods, and the plurality of vertical rods slide through the plurality of connecting plates respectively. A vibrating member is provided in the boiler body, and when the rotating rod rotates, the vibrating member drives the mesh plate to vibrate.

[0017] Furthermore, the vibrating element includes:

[0018] A plurality of springs are respectively sleeved on a plurality of vertical rods and located between the mesh plate and the connecting plate;

[0019] A plurality of connecting strips are arranged on the mesh plate and distributed in a ring shape, and the longitudinal section of the connecting strips is triangular.

[0020] Furthermore, a roller is provided at the bottom end of the shifting plate, and the roller rolls and overlaps with the mesh plate and the connecting strip.

[0021] Furthermore, the end of the rotating rod movably passes through the mesh plate and is connected to the second cylinder, and the shifting plate is constructed as an L-shaped plate.

[0022] Furthermore, the outer wall of the first conical mesh cylinder and the inner wall of the second conical mesh cylinder are both provided with a plurality of annularly distributed inclined plates in an array.

[0023] Furthermore, the flow regulating mechanism includes:

[0024] A plug plate, a slot is provided through one side of the hopper, and the plug plate movably passes through the slot;

[0025] The U-shaped frame is arranged on the outer wall of the hopper. A screw rod is threaded through the U-shaped frame, and the end of the screw rod is rotatably connected to the inserting plate.

[0026] The beneficial effects of this application are as follows:

[0027] 1. In the present application, a mesh plate is set, a rotating shaft is rotatably set above the mesh plate, and a paddle is set on the rotating shaft, and the wind force generated by the blower is used to blow the biomass fuel onto the mesh plate. The airflow will also impact the paddle when blowing the material, and the rotating paddle is used to disperse the fuel blown into the boiler body. When the dispersed fuel falls downward, it will pass through the second conical mesh cylinder and the first conical mesh cylinder in turn, thereby slowing down the falling speed of the biomass fuel, so that it can fully contact with the flame ignited by the gas, increase the combustion specific surface area of the biomass fuel and the flame combustion, and make it fully burned to reduce the nitrate content in the flue gas, so as to improve the denitrification efficiency.

[0028] 2. In the present application, the fuel gas and oxygen delivered will impact the impeller through the shaft and impeller arranged in the second cylinder, thereby driving the second cylinder to rotate and causing the flame to radiate in a rotating manner. At the same time, the rotation of the first conical cylinder will also impact the biofuel, causing the biomass fuel to splash when it falls, which not only further increases its falling time, but also makes it more dispersed, further increasing its contact and combustion time with the flame, and making it burn more fully. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural diagram of this application;

[0030] Figure 2 It is a sectional view of the three-dimensional structure of this application;

[0031] Figure 3 This is another three-dimensional structural cross-sectional view of the present application;

[0032] Figure 4 This application Figure 2 Enlarged view of point A in the middle;

[0033] Figure 5 This application Figure 2 Enlarged view of point B in the middle;

[0034] Figure 6 This application Figure 2 Enlarged view of point C in the middle;

[0035] Figure 7 This application Figure 3 Enlarged view of point D in the middle;

[0036] Figure numerals: 1, boiler body; 2, mesh plate; 3, mounting plate; 4, rotating rod; 5, dial plate; 6, hopper; 7, bracket; 8, blower; 9, feed pipe; 10, flow regulating mechanism; 11, air guide tube; 12, air hole; 13, gas pipe; 14, first conical mesh cylinder; 15, igniter; 16, second conical mesh cylinder; 17, branch pipe; 18, spiral plate; 19, connecting plate; 20, vertical rod; 21, vibrating member; 22, roller; 23, inclined plate; 1001, plug plate; 1002, U-shaped frame; 1003, screw rod; 1101, first cylinder; 1102, second cylinder; 1103, shaft rod; 1104, impeller; 2101, spring; 2102, connecting strip. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0038] like Figure 1-Figure 7As shown, a biomass boiler denitrification combustion device proposed in one embodiment of the present application includes: a boiler body 1, an inner wall of which is provided with a mesh plate 2, a combustion chamber is provided in the boiler body 1 and below the mesh plate 2, a mounting plate 3 is provided on the inner wall of the boiler body 1 and above the mesh plate 2, a rotating rod 4 is rotatably provided on the mounting plate 3, and a plurality of dial plates 5 distributed in a ring are provided on the outer surface of the rotating rod 4, and the plurality of dial plates 5 are in contact with the mesh plate 2; a hopper 6, a bracket 7 is provided on the outer surface of the boiler body 1, a blower 8 is provided on the bracket 7, and the air outlet of the blower 8 is aligned with the boiler body 1 The feed pipe 9 is connected to the boiler body 1, and the connecting port of the feed pipe 9 corresponds to the dial plate 5. The hopper 6 is set on the bracket 7 and the discharge end is connected to the feed pipe 9. The discharge end of the hopper 6 is provided with a flow regulating mechanism 10; the biomass fuel (granular biomass fuel) is placed in the hopper 6, and the discharge amount of the biomass fuel is adjusted by the flow regulating mechanism 10. When the biomass fuel is discharged, it falls into the feed pipe 9, and the blower 8 works, which draws in the external airflow and pressurizes the airflow to form a strong airflow. The strong airflow circulates along the feed pipe 9, and the strong airflow will The discharged biomass fuel is blown into the boiler body 1 from the feed pipe 9 and is located above the mesh plate 2. Preferably, the mesh holes of the mesh plate 2 are larger than the particle size of the biomass fuel, and the biomass fuel can fall downward from the mesh holes of the mesh plate 2. When a strong airflow carries the biomass fuel into the boiler body, the strong airflow will impact the paddle plate 5, thereby driving the rotating rod 4 to rotate. When the rotating rod 4 and the paddle plate 5 rotate, the biomass fuel entering the boiler body 1 will be dispersed onto the mesh plate 2 and respectively located in the area formed between two adjacent paddle plates 5. In addition, the paddle plate 5 will also scrape the mesh plate 2 when rotating. The biomass fuel is further dispersed and is not easily blocked by the mesh plate 2. The biomass fuel is in a dispersed state when entering the boiler body 1 and falls downward from the mesh holes of the mesh plate 2. The air guide 11 is coaxially arranged on the inner bottom wall of the boiler body 1. A plurality of air holes 12 are arranged in an array on the outer surface of the air guide 11. The bottom end of the air guide 11 is connected to a gas pipe 13 whose end is located outside the boiler body 1. A plurality of first conical mesh cylinders 14 are arranged in an array on the outer wall of the air guide 11. An igniter 15 corresponding to the gas pipe 13 is provided on the inner wall of the air guide 11.A plurality of second conical mesh tubes 16 are arranged in an array on the inner wall of the boiler body 1 and are staggered with a plurality of first conical mesh tubes 14. Preferably, the higher end of the first conical mesh tube 14 is connected to the air guide tube 11, and a first feeding gap is left between the lower end and the inner wall of the boiler body 1. The higher end of the second conical mesh tube 16 is connected to the inner wall of the boiler body 1, and a second feeding gap is left between the lower end and the air guide tube 11. The end of the gas pipe 13 away from the air guide tube 11 is connected to an external gas device. The gas is in a high-speed flow state along the gas pipe 13. When the gas flows at a high speed from the gas pipe 13, it will flow into the air guide tube 11 at a high speed and be discharged from a plurality of air holes 12, thereby filling the entire combustion chamber. The igniter 15 performs ignition, thereby igniting and burning the gas entering the air guide tube 11. The burning flame fills the entire combustion chamber. When the burning flame contacts the biomass fuel, it will ignite the biomass fuel. By providing the first conical mesh cylinder 14 and the second conical mesh cylinder 16, the biomass fuel, when falling from the mesh plate 2, will first fall onto the second conical mesh cylinder 16, then fall downward along its inclined surface from the second feed gap to the first conical mesh cylinder 14, and then fall along its inclined surface from the first feed gap to the second conical mesh cylinder 16. This makes the biomass fuel form an S-shaped path when falling, which is used to slow down its falling speed and increase its contact time with the burning flame. The overall arrangement of the device evenly disperses the biomass fuel through the paddle 5, and then slows its falling time through the first conical mesh cylinder 14 and the second conical mesh cylinder 16, allowing it to fully contact the flame, increasing the combustion specific surface area of the biomass fuel and the flame, thereby ensuring sufficient combustion of the biomass. This sufficient combustion can reduce the NOx and CO content in the flue gas, thereby improving the denitrification effect and enhancing practicality.

[0039] like Figure 6As shown, in some embodiments, the air guide 11 includes: a first cylinder 1101, which is fixed to the inner bottom wall of the boiler body 1, and the end of the first cylinder 1101 is rotatably connected to the second cylinder 1102, the first conical mesh cylinder 14 is arranged on the second cylinder 1102, and the gas pipe 13 is connected to the first cylinder 1101; a shaft 1103, which is coaxially connected to the second cylinder 1102, and an impeller 1104 is arranged at one end of the shaft 1103 located in the first cylinder 1101. After the gas flows from the gas pipe 13 to the first cylinder 1101 at a high speed, the high-speed flowing gas will impact the impeller 1104, thereby driving the shaft 110 3 and the second cylinder 1102 rotate. When the second cylinder 1102 rotates, the flames emitted from the air holes 12 are in a rotating shape as a whole, so that the flame combustion area is wider, so that the combustion effect of the biomass fuel is better. At the same time, when the second cylinder 1102 rotates, it will also drive the first conical mesh cylinder 14 to rotate. When the biomass fuel falls obliquely from the second conical mesh cylinder 16, it will hit the first conical mesh cylinder 14. Under the stress of the rotating impact force, the biomass fuel will sputter, so that it is effectively dispersed. At the same time, the impact will slow down its falling speed, so that it is fully in contact with the flame, so that it is fully burned, and the denitrification effect is further improved.

[0040] like Figure 1 、 Figure 2 and Figure 6 As shown, in some embodiments, the first cylinder 1101 is connected to a branch pipe 17 whose end is located outside the boiler body 1, and the branch pipe 17 is used to transport high-speed oxygen. Preferably, the end of the branch pipe 17 away from the first cylinder 1101 is connected to an external oxygen supply device, and the oxygen supply device transports high-speed oxygen into the branch pipe 17. The high-speed oxygen flows from the branch pipe 17 to the first cylinder 1101. After the oxygen flows into the first cylinder 1101, it is mixed with the remaining fuel gas to supply oxygen to the burning flame, thereby further improving the combustion effect. At the same time, the high-speed oxygen will also hit the impeller 1104, thereby applying a certain thrust to the rotating second cylinder 1102, so that the rotation of the second cylinder 1102 is more stable.

[0041] like Figure 6As shown, in some embodiments, a spiral plate 18 is connected between the inner wall of the second cylinder 1102 and the outer wall of the shaft 1103. The spiral plate 18 is provided to reduce the circulation space of the second cylinder 1102. When the circulation space is reduced, the oxygen and gas have a certain air pressure along the second cylinder 1102. Under the action of the air pressure, the mixed oxygen and gas will also impact the spiral plate 18, applying a certain thrust to the rotation of the second cylinder 1102, making the rotation of the second cylinder 1102 more stable. At the same time, the burning flame is in the form of spiral fireworks when burning in the second cylinder 1102, and as the second cylinder 1102 rotates, the flame emerging from the air hole 12 becomes more vigorous, further improving the combustion effect.

[0042] like Figure 5 As shown, in some embodiments, a plurality of connecting plates 19 are arranged in an array on the inner wall of the boiler body 1, and a plurality of vertical rods 20 are arranged in an array on the mesh plate 2. The plurality of vertical rods 20 slide through the plurality of connecting plates 19 respectively. A vibrating member 21 is provided in the boiler body 1. When the rotating rod 4 rotates, the vibrating member 21 drives the mesh plate 2 to vibrate. Through the sliding cooperation between the connecting plate 19 and the vertical rod 20, the mesh plate 2 is movably arranged in the boiler body 1. Through the setting of the vibrating member 21, when the rotating rod 4 rotates, it can also drive the mesh plate 2 to vibrate. By utilizing the vibration force, the biomass fuel is not easy to clog the mesh holes of the mesh plate 2, so that the biomass is discharged more smoothly, thereby improving practicality.

[0043] like Figure 2 and Figure 5 As shown, in some embodiments, the vibrating member 21 includes: a plurality of springs 2101, which are respectively mounted on a plurality of vertical rods 20 and located between the mesh plate 2 and the connecting plate 19; a plurality of connecting strips 2102, which are all arranged on the mesh plate 2 and distributed in a ring shape, and the longitudinal section of the connecting strip 2102 is triangular. When the rotating rod 4 drives the dial plate 5 to rotate, the dial plate 5 will scrape along the surface of the mesh plate 2. When the dial plate 5 passes through the connecting strip 2102, the end of the dial plate 5 will contact the inclined surface of the connecting strip 2102. Under the resistance force, the mesh plate 2 will move downward, causing the mesh plate 2 to squeeze the spring 2101. When the paddle plate 5 passes over the connecting strip 2102, the mesh plate 2 will move upward and reset under the elastic resistance of the spring 2101. As several paddle plates 5 move, several paddle plates 5 will respectively conflict with several connecting strips 2102, causing the mesh plate 2 to vibrate up and down, making it less likely to be blocked, which not only facilitates the falling of biomass fuel, but also facilitates the passage of flames and smoke, thereby improving practicality.

[0044] like Figure 7As shown, in some embodiments, a roller 22 is provided at the bottom end of the paddle plate 5, and the roller 22 rolls and overlaps with the mesh plate 2 and the connecting strip 2102. Since the paddle plate 5 has a certain friction resistance when in contact with the mesh plate 2 and the connecting strip 2102, the roller 22 is provided and rolled and overlapped with the mesh plate 2 and the connecting strip 2102 to reduce the friction resistance, so that the rotating rod 4 and the paddle plate 5 can rotate more smoothly, so that they can effectively rotate under the impact of the airflow.

[0045] like Figure 2 and Figure 3 As shown, in some embodiments, the end of the rotating rod 4 movably passes through the mesh plate 2 and is connected to the second cylinder 1102, and the paddle plate 5 is constructed as an L-shaped plate. By constructing the paddle plate 5 as an L-shaped plate, it has two end plates, one end of which is inclined. When the airflow is blown in from the feed pipe 9, it will contact the inclined end plate. The inclined design is used to increase the contact area between the airflow and the paddle plate 5, so that under the impact of the airflow, the paddle plate 5 is subjected to greater force and its rotation is more effective. By connecting the rotating rod 4 to the second cylinder 1102, when the airflow hits the paddle plate 5, it will also push the second cylinder 1102 to rotate. When the gas and oxygen impact the impeller 1104 and drive the second cylinder 1102 to rotate, the second cylinder 1102 will also drive the rotating rod 4 to rotate. The two cooperate with each other to make its rotation more stable.

[0046] like Figure 2 As shown, in some embodiments, the outer wall of the first conical mesh tube 14 and the inner wall of the second conical mesh tube 16 are both provided with a plurality of annularly distributed inclined plates 23 in an array. By providing the inclined plates 23 on the first conical mesh tube 14 and the second conical mesh tube 16, the inclined plates 23 act as a partition, so that the biomass fuel will not pile up on each other when it falls. At the same time, when the biomass fuel falls from the second conical mesh tube 16, it falls obliquely. When it falls onto the first conical mesh tube 14, the first conical mesh tube 14 rotates, and the inclined plates 23 thereon will collide and slap the biomass fuel, making its splash more dispersed, thereby slowing down its falling speed, further improving its combustion efficiency, and thus improving its practicality.

[0047] like Figure 4 As shown, in some embodiments, the flow regulating mechanism 10 includes: an insert plate 1001, a slot is opened through one side of the hopper 6, and the insert plate 1001 movably passes through the slot; a U-shaped frame 1002, which is arranged on the outer wall of the hopper 6, and a screw rod 1003 is threaded through the U-shaped frame 1002, and the end of the screw rod 1003 is rotatably connected to the insert plate 1001. When adjusting the discharge amount of the hopper 6, the screw rod 1003 is twisted to rotate and move, thereby driving the insert plate 1001 to slide along the slot, and the insert plate 1001 is used to cover the discharge port of the hopper 6 to different degrees to achieve the function of adjusting the discharge flow rate.

[0048] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Biomass boiler denitrification combustion device, characterized in that: include: A boiler body (1) is provided with a mesh plate (2) on its inner wall, a mounting plate (3) is provided on the inner wall of the boiler body (1) and above the mesh plate (2), a rotating rod (4) is rotatably provided on the mounting plate (3), and a plurality of shifting plates (5) distributed in a ring-like array are provided on the outer surface of the rotating rod (4), and the plurality of shifting plates (5) are in contact with and overlapped with the mesh plate (2); A hopper (6) is provided with a bracket (7) on the outer surface of the boiler body (1), a blower (8) is provided on the bracket (7), an air outlet of the blower (8) is connected to a feed pipe (9) of the boiler body (1), a connection port of the feed pipe (9) and the boiler body (1) corresponds to the dial plate (5), the hopper (6) is provided on the bracket (7) and a discharge end is connected to the feed pipe (9), and a flow regulating mechanism (10) is provided at the discharge end of the hopper (6); An air guide tube (11) is coaxially arranged on the inner bottom wall of the boiler body (1), the outer surface of the air guide tube (11) is provided with a plurality of air holes (12) in an array, the bottom end of the air guide tube (11) is connected to a gas pipe (13) whose end is located outside the boiler body (1), the outer wall of the air guide tube (11) is provided with a plurality of first conical mesh tubes (14) in an array, the inner wall of the air guide tube (11) is provided with an igniter (15) corresponding to the gas pipe (13), and the air guide tube (11) comprises: a first cylinder (1101) fixedly arranged on the inner bottom wall of the boiler body (1), the first cylinder (1101) is connected to a gas pipe (13) whose end is located outside the boiler body (1) an outer branch pipe (17), the branch pipe (17) is used to transport high-speed oxygen, the end of the first cylinder (1101) is rotatably connected to the second cylinder (1102), the first conical mesh cylinder (14) is arranged on the second cylinder (1102), and the gas pipe (13) is connected to the first cylinder (1101); a shaft (1103) is coaxially connected to the second cylinder (1102), and an impeller (1104) is provided at one end of the shaft (1103) located in the first cylinder (1101), the end of the rotating rod (4) movably passes through the mesh plate (2) and is connected to the second cylinder (1102), and the dial plate (5) is constructed as an L-shaped plate; A plurality of second conical mesh cylinders (16) are arranged in an array on the inner wall of the boiler body (1) and are respectively staggered with the plurality of first conical mesh cylinders (14).

2. The biomass boiler denitrification combustion device according to claim 1, characterized in that: A spiral plate (18) is connected between the inner wall of the second cylinder (1102) and the outer wall of the shaft (1103).

3. The biomass boiler denitrification combustion device according to claim 1, characterized in that: The inner wall of the boiler body (1) is provided with a plurality of connecting plates (19) in an array, the upper surface of the mesh plate (2) is provided with a plurality of vertical rods (20) in an array, and the plurality of vertical rods (20) respectively slide through the plurality of connecting plates (19). A vibrating member (21) is provided in the boiler body (1), and when the rotating rod (4) rotates, the vibrating member (21) drives the mesh plate (2) to vibrate.

4. The biomass boiler denitrification combustion device according to claim 3, characterized in that: The vibrating member (21) comprises: A plurality of springs (2101) are respectively mounted on the plurality of vertical rods (20) and are located between the mesh plate (2) and the connecting plate (19); A plurality of connecting bars (2102) are arranged on the mesh plate (2) and distributed in a ring shape, and the longitudinal cross-section of the connecting bars (2102) is triangular.

5. The biomass boiler denitrification combustion device according to claim 4, characterized in that: A roller (22) is provided at the bottom end of the shifting plate (5), and the roller (22) rolls and overlaps with the mesh plate (2) and the connecting strip (2102).

6. The biomass boiler denitrification combustion device according to claim 1, characterized in that: The outer wall of the first conical mesh cylinder (14) and the inner wall of the second conical mesh cylinder (16) are both provided with a plurality of annularly distributed inclined plates (23) in an array.

7. The biomass boiler denitrification combustion device according to claim 1, characterized in that: The flow regulating mechanism (10) comprises: A plug plate (1001) is provided on one side of the hopper (6) with a slot, and the plug plate (1001) is movable through the slot; A U-shaped frame (1002) is arranged on the outer wall of the hopper (6); a screw rod (1003) is threadedly passed through the U-shaped frame (1002); and an end of the screw rod (1003) is rotatably connected to the inserting plate (1001).

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