Biomass pyrolysis gas high efficiency low nitrogen burner

Abstract

The present invention discloses a biomass pyrolysis gas high-efficiency low-nitrogen burner, which belongs to the field of burners and includes an air duct and a gas pipe; wherein the gas pipe is sleeved inside the air duct, and the right end of the gas pipe penetrates the right end side wall of the air duct and extends to the outside; an air inlet pipe, wherein the air inlet pipe is installed on the upper surface of the air duct near the right end, and the inside of the air inlet pipe is interconnected with the inside of the air duct; an air intake pipe, wherein the air intake pipe is installed on the upper surface of the gas pipe near the right end, and the inside of the air intake pipe is interconnected with the inside of the gas pipe. Combustion can be achieved through multiple groups of nozzle pipes to form multiple groups of small flames for combustion. Compared with large flame combustion, when multiple groups of small flames are burned, the flame distribution is more dispersed, the combustion heat distribution is relatively uniform, and the situation of local high temperature is relatively rare. Such a design avoids the problem of high internal temperature of large flame combustion in the prior art and the generation of a large amount of nitrogen oxides as much as possible.

Description

Technical Field

[0001] The invention relates to the field of burners, and more particularly to a biomass pyrolysis gas high-efficiency and low-nitrogen burner. Background Art

[0002] Biomass refers to various organisms formed through photosynthesis, such as straw, rice husks, fruit shells, branches, wood chips and wood scraps. Biomass undergoes thermal decomposition in a low-oxygen or oxygen-free high-temperature environment to produce biomass pyrolysis gas. The composition of biomass pyrolysis gas is relatively complex, mainly including carbon monoxide, hydrogen, methane, carbon dioxide, some light hydrocarbons (such as ethylene, ethane, etc.) and a small amount of nitrogen. Compared with other fossil fuels, biomass pyrolysis gas produces fewer pollutants when burned.

[0003] The combustion of biomass pyrolysis gas often uses a burner. In order to reduce the nitrogen oxides produced by the burner during combustion, flue gas recirculation technology is currently the most widely used low-nitrogen combustion technology, which divides the burner into multiple combustion zones. In the primary combustion zone, an over-rich fuel combustion method is adopted, which means that the fuel supply is relatively large, while the oxygen supply is relatively insufficient. Under such oxygen-deficient conditions, the combustion temperature will be relatively low, because the amount of nitrogen oxides generated is closely related to the combustion temperature, and the temperature reduction reduces the formation of nitrogen oxides. Since the primary combustion is carried out in an oxygen-deficient environment, some incompletely burned intermediates will be produced, such as carbon monoxide, hydrogen and hydrocarbons; in the secondary combustion zone, an appropriate amount of air is introduced to allow these intermediates to further react with oxygen to complete the combustion process. The combustion at this stage is relatively mild and the temperature is well controlled, thereby inhibiting the generation of nitrogen oxides. The staged combustion achieves the purpose of reducing the generation of nitrogen oxides by controlling the temperature, oxygen distribution and combustion stage during the combustion process.

[0004] The combustion point in the prior art burner is too large, which will cause the temperature at the combustion point to be too high, and the temperature of the combustion point is difficult to control. An overly large combustion point is prone to form a local high-temperature zone. Combustion in a high-temperature environment is prone to the generation of nitrogen oxides. The large combustion point consumes too much energy and is prone to form certain local high-temperature areas. Long-term local high temperature will cause the performance of related components, such as the metal materials of the inner wall of the combustion chamber and the nozzle, to deteriorate, resulting in thermal fatigue, deformation and even cracking, thereby shortening the service life of the burner.

[0005] In view of this, in order to address the above-mentioned deficiencies, the present invention improves and optimizes the biomass pyrolysis gas burner in the prior art, and develops a biomass pyrolysis gas high-efficiency and low-nitrogen burner. Summary of the invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a high-efficiency and low-nitrogen burner for biomass pyrolysis gas, which can realize combustion through multiple groups of nozzle pipes to form multiple groups of small flames for combustion. Compared with the combustion of a large flame, when multiple groups of small flames burn, the flame distribution is more dispersed, the combustion heat distribution is relatively uniform, and the local high temperature situation is relatively rare. This design avoids as much as possible the problem of high internal temperature of large flame combustion in the prior art and the generation of a large amount of nitrogen oxides.

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] Biomass pyrolysis gas high-efficiency low-nitrogen burner, including air duct and gas pipe;

[0009] The gas pipe is sleeved inside the air duct, and the right end of the gas pipe penetrates the right end side wall of the air duct and extends to the outside;

[0010] An air inlet pipe, the air inlet pipe is installed on the upper surface of the air duct near the right end, and the interior of the air inlet pipe is connected to the interior of the air duct;

[0011] An air intake pipe, the air intake pipe is installed on the upper surface of the gas pipe near the right end, and the interior of the air intake pipe is communicated with the interior of the gas pipe;

[0012] A partition, wherein the partition is installed inside the gas pipe, and the edge of the partition is fixedly connected to the inner wall of the gas pipe;

[0013] Nozzle pipes, the nozzle pipes are arranged through the partition, and the nozzle pipes are arranged in multiple groups, and the multiple groups of nozzle pipes are distributed in a ring shape;

[0014] An air inlet hole is formed on the side wall of the outer circumferential surface of the gas pipe, and the air inlet holes are arranged in groups. The air inlet holes are formed on the right side of the partition;

[0015] An ignition sleeve, wherein the ignition sleeve is installed inside the air duct, and the right end of the ignition sleeve is fixedly connected to the partition;

[0016] A cleaning assembly is installed at the right end of the air duct, and a rotating assembly is also installed in the cleaning assembly. The cleaning assembly includes a hole-breaking needle, a first motor, a second motor and an electromagnet. The first motor and the second motor can drive the hole-breaking needle to move to the corresponding blocked nozzle tube. The electromagnet will also drive the rotating assembly when ejecting the hole-breaking needle, and the rotating assembly drives the hole-breaking needle to be ejected into the nozzle tube in a rotating manner.

[0017] The biomass pyrolysis gas high-efficiency low-nitrogen burner described in this embodiment, wherein the cleaning component includes:

[0018] A first motor, the first motor being arranged on the right side of the partition;

[0019] A screw rod, the lower end of which is fixedly connected to the output shaft of the first motor;

[0020] An optical axis, the lower end of which is fixedly mounted on the housing of the first motor;

[0021] A moving block, wherein the moving block is sleeved outside the lead screw and the optical axis, the moving block is threadedly connected to the lead screw, and the moving block is slidably connected to the optical axis;

[0022] An electromagnet, the electromagnet being mounted on the left outer surface of the moving block;

[0023] A stabilizing bar, the stabilizing bar being mounted on the left outer surface of the electromagnet;

[0024] A moving tube, wherein the moving tube is sleeved on the outside of the stabilizing rod;

[0025] A permanent magnet block, wherein the permanent magnet block is fixedly installed at the right end of the moving tube;

[0026] A piercing needle, the piercing needle is fixedly installed at the left end of the moving tube;

[0027] A flow sensor is installed at the left end of the nozzle pipe, and is used to monitor the gas flow at the corresponding nozzle pipe.

[0028] The biomass pyrolysis gas high-efficiency low-nitrogen burner described in this embodiment, wherein the rotating assembly includes:

[0029] A guide plate, wherein the guide plate is fixedly mounted on the side surface of the stabilizer bar, and the guide plates are arranged in multiple groups, and the multiple groups of guide plates are distributed in an annular shape on the outer circumferential surface of the stabilizer bar, and the guide plates are arranged in an inclined manner;

[0030] A guide block is arranged inside the moving tube near the right end, the guide block is fixedly connected to the inner wall of the moving tube, the number of the guide blocks corresponds to the number of the guide plates, and a plurality of groups of the guide blocks are distributed in a ring shape on the inner wall of the moving tube.

[0031] The biomass pyrolysis gas high-efficiency low-nitrogen burner described in this embodiment, wherein the cleaning component room includes:

[0032] Connecting rods, the connecting rods are provided in two groups, the two groups of connecting rods are respectively fixedly connected to the left and right sides of the first motor, and the connecting rod of one group at the left end of the first motor is rotatably connected to the partition;

[0033] The second motor is fixedly mounted on the right end of the gas pipe, and the output shaft of the second motor passes through the gas pipe and is fixedly connected to the corresponding connecting rod.

[0034] The biomass pyrolysis gas high-efficiency low-nitrogen burner described in this embodiment, wherein the cleaning component includes:

[0035] An annular groove, the annular groove is formed on the inner wall of the gas pipe;

[0036] A slider is slidably arranged inside the annular groove, the slider is installed on the upper ends of the lead screw and the optical axis, the slider is rotationally connected to the lead screw, and the slider is fixedly connected to the optical axis.

[0037] The biomass pyrolysis gas high-efficiency low-nitrogen burner described in this embodiment includes:

[0038] The sleeve is sleeved at the left end opening of the nozzle pipe, and the number of the sleeves corresponds to the number of the nozzle pipes. The right end of the sleeve is fixedly connected to the partition.

[0039] The biomass pyrolysis gas high-efficiency low-nitrogen burner described in this embodiment includes:

[0040] A rubber pad is fixedly connected to the left outer surface of the electromagnet.

[0041] The biomass pyrolysis gas high-efficiency low-nitrogen burner described in this embodiment includes:

[0042] The confluence tube is fixedly installed at the right end of the nozzle tube. The number of the confluence tubes corresponds to the number of the nozzle tubes. The confluence tube can be fitted on the outside of the movable tube. The left end of the confluence tube is conical in design. The flow sensor is installed through the cone of the confluence tube.

[0043] The biomass pyrolysis gas high-efficiency low-nitrogen burner described in this embodiment includes:

[0044] An annular plate, the annular plate being installed on the outer surface of the gas pipe near the left end;

[0045] The air guide tubes are arranged in multiple groups, the air guide tubes are arranged through the annular plate, and the multiple groups of air guide tubes are distributed in an annular shape, and the multiple groups of air guide tubes are arranged at the same inclined angle.

[0046] The biomass pyrolysis gas high-efficiency low-nitrogen burner described in this embodiment includes:

[0047] A flame guide cone, which is arranged inside the air duct near the left end, with the tip of the flame guide cone facing the outside of the air duct;

[0048] The flame guide plate, the flame guide cone is arranged in multiple groups of rings, the flame guide plate is installed on the outer surface of the flame guide cone, the multiple groups of flame guide plates are all inclined at the same angle, and the end of the flame guide plate away from the flame guide cone is fixedly connected to the inner wall of the air duct.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] (1) This solution uses multiple groups of nozzle pipes to burn, forming multiple groups of small flames for combustion. Compared with large flame combustion, when multiple groups of small flames burn, the flame distribution is more dispersed, the combustion heat distribution is relatively uniform, and the local high temperature situation is relatively rare. This design avoids the problem of high internal temperature of large flame combustion in the prior art and the generation of a large amount of nitrogen oxides as much as possible.

[0051] (2) This scheme allows the mixed gas to undergo flameless combustion in the casing. The flameless combustion speed is relatively slow, so that the reaction between biomass gas and air is relatively mild. This combustion has the effect of reducing nitrogen oxides to a certain extent.

[0052] (3) This solution allows the hole-breaking needle to unclog the nozzle pipe in a rotating state. Compared with the method of directly inserting the hole-breaking needle to clean the nozzle pipe, the hole-breaking needle directly inserts the nozzle pipe in a rotating state, which has a better unclogging effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 This is an appearance view of the overall structure of the present invention;

[0054] Figure 2 It is a schematic diagram of the internal structure of the air duct of the present invention;

[0055] Figure 3 It is a cross-sectional view of the overall mechanism of the present invention;

[0056] Figure 4 It is a structural schematic diagram of the partition of the present invention;

[0057] Figure 5 For the present invention Figure 3 The structural diagram at A in the middle;

[0058] Figure 6 It is a structural schematic diagram of the second motor of the present invention;

[0059] Figure 7 It is a schematic diagram of the structure inside the moving tube of the present invention;

[0060] Figure 8 It is a structural schematic diagram of the guide plate of the present invention;

[0061] Fig. 9 This is a diagram showing the installation positions of the guide block and the movable pipe of the present invention.

[0062] Description of the numbers in the figure:

[0063] 1. Air duct; 2. Gas pipe; 3. Air inlet pipe; 4. Air inlet pipe; 5. Ignition sleeve; 6. Air inlet hole; 7. Partition; 8. Nozzle pipe; 9. Sleeve; 10. Second motor; 11. Connecting rod; 12. First motor; 13. Moving block; 14. Screw rod; 15. Optical axis; 16. Electromagnet; 17. Permanent magnet block; 18. Moving pipe; 19. Stabilizing rod; 20. Punching needle; 21. Guide block; 22. Guide plate; 23. Converging tube; 24. Rubber pad; 25. Slider; 26. Annular groove; 27. Annular plate; 28. Air guide pipe; 29. ​​Flame guide cone; 30. Flame guide plate; 31. Flow sensor. DETAILED DESCRIPTION

[0064] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0065] See also Figures 1 to 9 The present invention provides a technical solution for a biomass pyrolysis gas high-efficiency and low-nitrogen burner:

[0066] The biomass pyrolysis gas high-efficiency low-nitrogen burner comprises an air duct 1 and a gas pipe 2; wherein the gas pipe 2 is sleeved inside the air duct 1, and the right end of the gas pipe 2 penetrates the right end side wall of the air duct 1 and extends to the outside; an air inlet pipe 3, which is installed on the upper surface of the air duct 1 near the right end, and the interior of the air inlet pipe 3 is interconnected with the interior of the air duct 1; an air inlet pipe 4, which is installed on the upper surface of the gas pipe 2 near the right end, and the interior of the air inlet pipe 4 is interconnected with the interior of the gas pipe 2; a partition 7, The partition 7 is installed inside the gas pipe 2, and the edge of the partition 7 is fixedly connected to the inner wall of the gas pipe 2; the nozzle pipe 8 is arranged through the partition 7, and the nozzle pipe 8 is arranged in multiple groups, and the multiple groups of nozzle pipes 8 are distributed in a ring shape; the air inlet hole 6 is opened through the outer cylindrical side wall of the gas pipe 2, and the air inlet hole 6 is arranged in multiple groups, and the air inlet hole 6 is opened on the right side of the partition 7; the ignition sleeve 5, the ignition sleeve 5 is installed inside the air duct 1, and the right end of the ignition sleeve 5 is fixedly connected to the partition 7.

[0067] In actual use, first, the air intake pipe 4 is connected to the external connecting pipe, and the biomass gas is transported into the air intake pipe 4 through the connecting pipe, and the biomass gas will enter the gas pipe 2, and the biomass gas will flow to the left along the inner wall of the gas pipe 2, and the air intake pipe 3 is connected to the external blower, and the air is transported into the air intake pipe 3 through the blower. After the air flows into the inside of the air duct 1, it will flow to the left along the gap between the gas pipe 2 and the air duct 1, and part of the air will enter the gas pipe 2 through the air intake hole 6, and the air will mix with the internal biomass gas. The mixed gas will be mixed with the fuel gas, and finally the mixed gas will be discharged from the left end of the nozzle pipe 8. At this time, the discharged mixed gas can be ignited by controlling the ignition sleeve 5, and the left ends of multiple groups of nozzle pipes 8 will burn, and multiple groups of small flames will be formed for combustion. Compared with the combustion of a large flame, when multiple groups of small flames burn, the flame distribution is more dispersed, the combustion heat distribution is relatively uniform, and the local high temperature situation is relatively rare. This design avoids the problem of high internal temperature of large flame combustion in the prior art and the generation of a large amount of nitrogen oxides as much as possible, and it is easier to control the temperature when multiple groups of small flames burn.

[0068] In some embodiments, a sleeve 9 is included, which is sleeved on the left end opening of the nozzle tube 8, and the number of the sleeves 9 corresponds to the number of the nozzle tubes 8, and the right end of the sleeve 9 is fixedly connected to the partition 7.

[0069] By adopting the above technical solution, the mixed gas is first burned in the sleeve 9. Since the combustion space is small, the mixed gas will burn flamelessly in the sleeve 9. The flameless combustion speed is relatively slow, so that the reaction between biomass gas and air is relatively mild. This combustion plays a role in reducing nitrogen oxides to a certain extent.

[0070] In some embodiments, the cleaning assembly includes a first motor 12, which is arranged on the right side of the partition 7; a screw rod 14, the lower end of which is fixedly connected to the output shaft of the first motor 12; an optical axis 15, the lower end of which is fixedly mounted on the housing of the first motor 12; a moving block 13, which is sleeved on the outside of the screw rod 14 and the optical axis 15, the moving block 13 is threadedly connected to the screw rod 14, and the moving block 13 is slidably connected to the optical axis 15; an electromagnet 16, which is mounted on the moving block 1 3; a stabilizing rod 19, which is mounted on the left outer surface of the electromagnet 16; a moving tube 18, which is sleeved on the outside of the stabilizing rod 19; a permanent magnet block 17, which is fixedly mounted at the right end of the moving tube 18; a piercing needle 20, which is fixedly mounted at the left end of the moving tube 18; a flow sensor 31, which is mounted at the left end of the nozzle tube 8, and the flow sensor 31 is used to monitor the gas flow at the corresponding nozzle tube 8.

[0071] Connecting rod 11, the connecting rod 11 is provided in two groups, and the two groups of connecting rods 11 are respectively fixedly connected to the left and right sides of the first motor 12, and the connecting rod 11 of one group at the left end of the first motor 12 is rotatably connected to the partition 7; the second motor 10, the second motor 10 is fixedly installed at the right end of the gas pipe 2, and the output shaft of the second motor 10 passes through the gas pipe 2 and is fixedly connected to the corresponding connecting rod 11.

[0072] The composition of biomass gas is relatively complex, and the purification process of biomass gas is relatively cumbersome, which leads to the fact that some impurities are often contained in the biomass gas. These impurities may be deposited at the nozzle pipe 8 to form carbon deposits. As time goes by, the carbon deposits gradually accumulate and increase, which may block the small channels of the nozzle pipe 8, affecting the normal ejection of the biomass gas and causing uneven temperature distribution inside the gas engine. For this reason, the present invention installs a flow sensor 31 near each group of nozzle pipes 8, monitors the gas flow at each group of nozzle pipes 8 through the flow sensor 31, and installs a controller on the outside of the air duct 1, which is electrically connected to the flow sensor 31. In addition, the controller is also electrically connected to the first motor 12, the second motor 10 and the electromagnet 16 respectively. When the flow sensor 31 detects that the corresponding nozzle pipe 8 is abnormal, the controller controls the second motor 10 to start, and the second motor 10 drives the connecting rod 11 to rotate. When the connecting rod 11 rotates, it also drives the first motor 12 to rotate. When the first motor 12 rotates to the corresponding position, the controller turns on the first motor 12, and the first motor 12 drives the screw rod 14 to rotate forward and reverse. When the screw rod 14 rotates forward and reverse, it drives the moving block 13 to move up and down along the screw rod 14. When the moving block 13 moves to the corresponding position, the controller controls the electromagnet 16 to be energized, and the electromagnet 16 is energized to generate magnetism. At this time, the adjacent surfaces of the electromagnet 16 and the permanent magnet block 17 have the same magnetic poles. At the moment when the electromagnet 16 is energized, the magnetic repulsion force will push the permanent magnet block 17. The magnetic block 17 pops out, thereby driving the moving tube 18 to move to the left along the stabilizing rod 19, and finally the hole-breaking needle 20 will be inserted into the nozzle tube 8 to clear the nozzle tube 8, and then the controller controls the electromagnet 16 to reverse the power, at which time the electromagnet 16 will magnetically attract the permanent magnet block 17, and the permanent magnet block 17 will move to the right and drive the hole-breaking needle 20 to separate from the nozzle tube 8. If the nozzle tube 8 has not been cleared, the hole-breaking needle 20 can be controlled to repeatedly transport the nozzle tube 8 until the nozzle tube 8 is cleared.

[0073] In some embodiments, the rotating component includes a guide plate 22, which is fixedly mounted on the side surface of the stabilizer bar 19, and the guide plates 22 are arranged in multiple groups, and the multiple groups of guide plates 22 are distributed in a ring shape on the outer circular surface of the stabilizer bar 19, and the guide plates 22 are arranged at an angle; a guide block 21, the guide block 21 is arranged inside the moving tube 18 near the right end position, the guide block 21 is fixedly connected to the inner wall of the moving tube 18, the number of guide blocks 21 corresponds to the number of guide plates 22, and the multiple groups of guide blocks 21 are distributed in a ring shape on the inner wall of the moving tube 18.

[0074] When the permanent magnet block 17 pops up to the left end, the guide block 21 will move along the guide plate 22. In the process of the guide block 21 moving along the guide plate 22, the moving tube 18 will rotate. Because the moving tube 18 moves to the left instantly, when the guide block 21 is separated from the guide plate 22, the moving tube 18 will rotate along the previous rotation direction. That is to say, after the guide block 21 is separated from the guide plate 22, the moving tube 18 moves to the left while rotating. In this way, the hole-breaking needle 20 unclogs the nozzle tube 8 in a rotating state. Compared with the hole-breaking needle 20 that uses direct insertion to clean the nozzle tube 8, the hole-breaking needle 20 is directly inserted into the nozzle tube 8 in a rotating state, and the dredging effect is better.

[0075] In some embodiments, the cleaning assembly includes an annular groove 26, which is opened on the inner wall of the gas pipe 2; a slider 25, which is slidably arranged inside the annular groove 26, and the slider 25 is installed at the upper ends of the screw rod 14 and the optical axis 15, and the slider 25 is rotatably connected to the screw rod 14, and the slider 25 is fixedly connected to the optical axis 15.

[0076] When the second motor 10 drives the first motor 12 to rotate, the slider 25 will slide in the annular groove 26 to support the lead screw 14 and the optical axis 15, thereby ensuring that the moving parts can work stably.

[0077] In some embodiments, a rubber pad 24 is included and fixedly connected to the left outer surface of the electromagnet 16 .

[0078] The electromagnet 16 attracts the permanent magnet block 17 to move to the right. When the electromagnet 16 contacts the permanent magnet block 17, the impact force between the electromagnet 16 and the permanent magnet block 17 can be reduced by setting the rubber pad 24. When the electromagnet 16 attracts the permanent magnet block 17 to move to the right, the current of the electromagnet 16 can be controlled from small to large, and the magnetism of the electromagnet 16 will also increase from small to large. The attraction of the electromagnet 16 to the permanent magnet block 17 is gradually increased, which means that the acceleration of the permanent magnet block 17 is gradually increased during the process of being attracted, rather than being instantly attracted by a large attraction and moving quickly. This can also reduce the impact force between the electromagnet 16 and the permanent magnet block 17 to a certain extent, thereby protecting the electromagnet 16 and the permanent magnet block 17.

[0079] In some embodiments, a confluence tube 23 is included, which is fixedly installed at the right end of the nozzle tube 8. The number of confluence tubes 23 corresponds to the number of nozzle tubes 8. The confluence tube 23 can be fitted on the outside of the movable tube 18. The left end of the confluence tube 23 is conical in design, and the flow sensor 31 is installed through the cone of the confluence tube 23.

[0080] After the hole-breaking needle 20 clears the nozzle tube 8, the hole-breaking needle 20 continues to move to the left end for a distance. At this time, the moving tube 18 will be inserted into the inside of the manifold 23 and compress the air inside the manifold 23, which acts as a buffer for the moving tube 18 to continue moving. To a certain extent, it can prevent the hole-breaking needle 20 from being inserted too deeply into the nozzle tube 8 and becoming difficult to pull out.

[0081] In some embodiments, it includes an annular plate 27, which is installed on the outer surface of the gas pipe 2 near the left end; an air guide pipe 28, which is arranged in multiple groups, and the air guide pipes 28 are arranged through the annular plate 27, and the multiple groups of air guide pipes 28 are distributed in a ring shape, and the multiple groups of air guide pipes 28 are all inclined at the same angle.

[0082] After the mixed gas burns at the nozzle pipe 8, the smoke generated after the combustion will be discharged from the left end of the gas pipe 2. At the same time, a flame will also be ejected from the left end of the gas pipe 2. The air flowing between the gas pipe 2 and the air duct 1 will enter the air guide pipe 28. Because the multiple groups of air guide pipes 28 are all inclined at the same angle, the ejected air forms a cyclone, which will draw in the flame ejected from the left end of the gas pipe 2. The flame is fully in contact with the air, so that the gas that is not fully burned in the gas discharged from the gas pipe 2 will be burned again, thereby reducing pollutant emissions.

[0083] In some embodiments, it includes a flame guide cone 29, which is arranged inside the air duct 1 near the left end, with the tip of the flame guide cone 29 facing the outside of the air duct 1; a flame guide plate 30, the flame guide cone 29 is arranged in multiple groups of rings, and the flame guide plates 30 are installed on the outer surface of the flame guide cone 29, and the multiple groups of flame guide plates 30 are all inclined at the same angle, and the end of the flame guide plate 30 away from the flame guide cone 29 is fixedly connected to the inner wall of the air duct 1.

[0084] The flame is finally discharged from the left end of the air duct 1. The discharged flame will be restricted by the inclined flame guide plate 30 to form a flame vortex. The flame vortex will burn along the flame guide cone 29. In this way, the flame will no longer be erratic during the combustion process, which plays a role in stabilizing the flame. The stable flame temperature distribution is relatively uniform, and there will be no obvious local high temperature or low temperature areas, thereby ensuring the heating effect of the burner.

[0085] Working principle: first, the air intake pipe 4 is connected to the external connecting pipe, and the biomass gas is transported to the air intake pipe 4 through the connecting pipe, and the biomass gas will enter the gas pipe 2, and the biomass gas will flow to the left along the inner wall of the gas pipe 2, and the air intake pipe 3 is connected to the external blower, and the air is transported to the air intake pipe 3 through the blower. After the air flows into the inside of the air duct 1, it will flow to the left along the gap between the gas pipe 2 and the air duct 1, and part of the air will enter the gas pipe 2 through the air inlet hole 6, and the incoming air will be mixed with the internal biomass gas, and finally the mixed gas will be discharged from the left end of the nozzle pipe 8. At this time, the discharged mixed gas can be ignited by controlling the ignition sleeve 5, and the left ends of the multiple groups of nozzle pipes 8 will burn, so that the mixed gas will burn first in the sleeve 9. Because the combustion space is small, the mixed gas will burn flamelessly in the sleeve 9;

[0086] After the mixed gas burns at the nozzle pipe 8, the smoke generated after the combustion will be discharged from the left end of the gas pipe 2. At the same time, a flame will also be ejected from the left end of the gas pipe 2. The air flowing between the gas pipe 2 and the wind pipe 1 will enter the air guide pipe 28. Because the multiple groups of air guide pipes 28 are all inclined at the same angle, the ejected air forms a whirlwind, and the whirlwind will be drawn into the flame ejected from the left end of the gas pipe 2. The flame is fully in contact with the air, so that the gas that is not fully burned in the gas discharged from the gas pipe 2 is burned again, reducing pollutant emissions. The flame is finally discharged from the left end of the wind pipe 1, and the discharged flame will be restricted by the inclined flame guide plate 30 to form a flame vortex, which will burn along the flame guide cone 29. In this way, the flame will no longer be erratic during the combustion process, which plays a role in stabilizing the flame. The stable flame temperature distribution is relatively uniform, and there will be no obvious local high temperature or low temperature areas, thereby ensuring the heating effect of the burner.

[0087] By installing a flow sensor 31 near each group of nozzle pipes 8, the flow sensor 31 is used to monitor the gas flow at each group of nozzle pipes 8, and by installing a controller on the outside of the air duct 1, the controller is electrically connected to the flow sensor 31, and the controller is also electrically connected to the first motor 12, the second motor 10 and the electromagnet 16 respectively. When the flow sensor 31 detects that the corresponding nozzle pipe 8 is abnormal, the controller controls the second motor 10 to turn on, and the second motor 10 drives the connecting rod 11 to rotate. When the connecting rod 11 rotates, it also drives the first motor 12 to rotate. When the first motor 12 rotates to the corresponding position, the controller controls the first motor 12 to turn on, and the first motor 12 drives the screw rod 14 to rotate forward and backward. When the screw rod 14 rotates forward and backward, it drives the moving block 13 to move up and down along the screw rod 14. When the moving block 13 moves to the corresponding position, the controller controls the electromagnet 16 to energize, and the electromagnet 1 6 is energized to generate magnetism. At this time, the adjacent surfaces of the electromagnet 16 and the permanent magnet block 17 have the same magnetic poles. At the moment when the electromagnet 16 is energized, the magnetic repulsion force will push the permanent magnet block 17 to pop out, thereby driving the moving tube 18 to move leftward along the stabilizing rod 19. When the permanent magnet block 17 pops out to the left end, the guide block 21 will move along the guide plate 22. In the process of the guide block 21 moving along the guide plate 22, the moving tube 18 will rotate. Because the moving tube 18 moves leftward instantly, when the guide block 21 is separated from the guide plate 22, the moving tube 18 will rotate along the previous rotation direction, that is, after the guide block 21 is separated from the guide plate 22, the moving tube 18 rotates to move leftward, so that the piercing needle 20 is used to dredge the nozzle tube 8 in a rotating state. Compared with the piercing needle 20 that uses a direct insertion method to clean the nozzle tube 8, the piercing needle 20 is directly inserted into the nozzle tube 8 in a rotating state, and its dredging effect is better.

[0088] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Biomass pyrolysis gas high-efficiency low-nitrogen burner, characterized by: include: An air duct (1) and a gas pipe (2); The gas pipe (2) is sleeved inside the air pipe (1), and the right end of the gas pipe (2) penetrates the right end side wall of the air pipe (1) and extends to the outside; An air inlet pipe (3), the air inlet pipe (3) being installed on the upper surface of the air duct (1) at a position close to the right end, and the interior of the air inlet pipe (3) is in communication with the interior of the air duct (1); An air intake pipe (4), the air intake pipe (4) being mounted on the upper surface of the gas pipe (2) at a position close to the right end, and the interior of the air intake pipe (4) and the interior of the gas pipe (2) being in communication with each other; A partition (7), wherein the partition (7) is installed inside the gas pipe (2), and the edge of the partition (7) is fixedly connected to the inner wall of the gas pipe (2); A nozzle pipe (8), wherein the nozzle pipe (8) is arranged through the partition (7), and the nozzle pipe (8) is arranged in a plurality of groups, and the plurality of groups of nozzle pipes (8) are distributed in a ring shape; An air inlet hole (6), the air inlet hole (6) being formed through the side wall of the outer circumferential surface of the gas pipe (2), the air inlet holes (6) being provided in a plurality of groups, and the air inlet holes (6) being formed on the right side of the partition plate (7); An ignition sleeve (5), the ignition sleeve (5) being installed inside the air duct (1), and the right end of the ignition sleeve (5) being fixedly connected to the partition plate (7); A cleaning assembly is installed at the right end of the air duct (1), and a rotating assembly is also installed in the cleaning assembly. The cleaning assembly includes a hole-breaking needle (20), a first motor (12), a second motor (10) and an electromagnet (16). The first motor (12) and the second motor (10) can drive the hole-breaking needle (20) to move to the corresponding blocked nozzle tube (8). The electromagnet (16) also drives the rotating assembly when ejecting the hole-breaking needle (20), and the hole-breaking needle (20) is ejected into the nozzle tube (8) in a rotating manner through the rotating assembly. The cleaning components include: A first motor (12), the first motor (12) being arranged on the right side of the partition (7); A screw rod (14), the lower end of the screw rod (14) being fixedly connected to the output shaft of the first motor (12); An optical axis (15), the lower end of the optical axis (15) being fixedly mounted on the housing of the first motor (12); A moving block (13), the moving block (13) being sleeved on the outside of the screw rod (14) and the optical axis (15), the moving block (13) being threadedly connected to the screw rod (14), and the moving block (13) being slidably connected to the optical axis (15); An electromagnet (16), wherein the electromagnet (16) is mounted on the left outer surface of the moving block (13); A stabilizing rod (19), wherein the stabilizing rod (19) is mounted on the left outer surface of the electromagnet (16); A movable tube (18), wherein the movable tube (18) is sleeved on the outside of the stabilizing rod (19); A permanent magnet block (17), wherein the permanent magnet block (17) is fixedly mounted at the right end of the moving tube (18); A puncture needle (20), wherein the puncture needle (20) is fixedly mounted at the left end of the moving tube (18); A flow sensor (31), the flow sensor (31) being installed at the right end of the nozzle pipe (8), the flow sensor (31) being used to monitor the gas flow at the corresponding nozzle pipe (8); Connecting rods (11), the connecting rods (11) are provided in two groups, the two groups of connecting rods (11) are respectively fixedly connected to the left and right sides of the first motor (12), and the connecting rod (11) of the left end of the first motor (12) is rotatably connected to the partition (7); a second motor (10), the second motor (10) being fixedly mounted on the right end of the gas pipe (2), the output shaft of the second motor (10) passing through the gas pipe (2) and being fixedly connected to a corresponding connecting rod (11); The rotating assembly includes: A guide plate (22), the guide plate (22) being fixedly mounted on a side surface of the stabilizing rod (19), and the guide plates (22) being arranged in a plurality of groups, the plurality of groups of guide plates (22) being distributed in an annular shape on an outer circumferential surface of the stabilizing rod (19), and the guide plates (22) being arranged in an inclined manner; A guide block (21), the guide block (21) being arranged inside the moving tube (18) near the right end, the guide block (21) being fixedly connected to the inner wall of the moving tube (18), the number of the guide blocks (21) corresponding to the number of the guide plates (22), and a plurality of groups of the guide blocks (21) being distributed in an annular shape on the inner wall of the moving tube (18).

2. The biomass pyrolysis gas high-efficiency and low-nitrogen burner according to claim 1 is characterized in that: The cleanup component also includes: an annular groove (26), wherein the annular groove (26) is formed on the inner wall of the gas pipe (2); A slider (25), the slider (25) being slidably disposed inside the annular groove (26), the slider (25) being mounted on the upper ends of the screw rod (14) and the optical axis (15), the slider (25) being rotationally connected to the screw rod (14), and the slider (25) being fixedly connected to the optical axis (15).

3. The biomass pyrolysis gas high-efficiency low-nitrogen burner according to claim 2 is characterized in that: include: A sleeve (9), the sleeve (9) being sleeved on the left end opening of the nozzle pipe (8), and the number of the sleeves (9) corresponds to the number of the nozzle pipes (8), and the right end of the sleeve (9) is fixedly connected to the partition plate (7).

4. The biomass pyrolysis gas high-efficiency low-nitrogen burner according to claim 3 is characterized in that: include: A rubber pad (24) is fixedly connected to the left outer surface of the electromagnet (16).

5. The biomass pyrolysis gas high-efficiency low-nitrogen burner according to claim 3 is characterized in that: include: A confluence tube (23), wherein the confluence tube (23) is fixedly mounted on the right end of the nozzle tube (8), the number of the confluence tubes (23) corresponds to the number of the nozzle tubes (8), the confluence tube (23) can be fitted onto the outside of the movable tube (18), the left end of the confluence tube (23) is designed to be conical, and the flow sensor (31) is installed through the conical portion of the confluence tube (23).

6. The biomass pyrolysis gas high-efficiency low-nitrogen burner according to claim 5 is characterized in that: include: an annular plate (27), the annular plate (27) being mounted on the outer surface of the gas pipe (2) near the left end; The air guide tubes (28) are arranged in a plurality of groups, the air guide tubes (28) are arranged through the annular plate (27), and the plurality of groups of air guide tubes (28) are distributed in an annular shape, and the plurality of groups of air guide tubes (28) are arranged at the same inclined angle.

7. The biomass pyrolysis gas high-efficiency and low-nitrogen burner according to claim 6 is characterized in that: include: A flame guide cone (29), the flame guide cone (29) being arranged inside the air duct (1) near the left end, with the tip of the flame guide cone (29) facing the outside of the air duct (1); The flame guide plates (30) are arranged in a plurality of groups of annular shapes. The flame guide plates (30) are mounted on the outer surface of the flame guide cone (29). The plurality of groups of the flame guide plates (30) are arranged at the same inclined angle. One end of the flame guide plates (30) away from the flame guide cone (29) is fixedly connected to the inner wall of the air duct (1).

Images