A low-nitrogen burner

Abstract

The utility model discloses a low nitrogen combustor belongs to low nitrogen combustor field. A low nitrogen combustor, including combustor frame body, the top of combustor frame body is provided with combustor casing, the surface of combustor frame body is provided with support, the surface of support is provided with damping seat, the surface of support and damping seat is provided with buffer damping mechanism, the surface of air inlet cover and filter screen is provided with convenient replacement mechanism, the surface of combustion chamber and assembly board is provided with sealing installation mechanism. The utility model not only can prevent high temperature flue gas leakage when low nitrogen combustor uses, improves combustion efficiency, reduces the emission of pollutant, can guarantee the filtration effect to air through regular replacement filter screen when low nitrogen combustor uses, further improves its combustion efficiency, and can reduce the loss of equipment when low nitrogen combustor uses, improves the stability when low nitrogen combustor works, reduces the pollution of noise.

Description

Technical Field

[0001] This utility model relates to the field of low-NOx burner technology, and in particular to a low-NOx burner. Background Technology

[0002] Low-NOx burners are devices that integrate traditional burners with the addition of blowers, induced draft fans, frequency converters, control valves, and multiple circuits to provide more efficient thermal energy to boilers through clean energy and burner operation. Low-NOx burners refer to burners with low nitrogen oxide emissions during fuel combustion. However, existing low-NOx burners have some shortcomings in use. In order to meet market needs, a new type of low-NOx burner is required.

[0003] A search revealed Chinese patent authorization number 202422793105.9, which discloses a low-NOx burner, including a burner body and an exhaust pipe disposed on the outside of the burner body. A transfer pipe is fixedly installed on one side of the exhaust pipe, and a first diversion pipe is connected to one side of the transfer pipe. A gas mixing pipe is connected to the outside of one end of the first diversion pipe. The low-NOx burner in the aforementioned patent has the following shortcomings: the sealing effect of existing low-NOx burners needs further improvement, which makes it difficult to prevent high-temperature flue gas leakage, resulting in insufficient combustion efficiency and increased pollutant emissions; moreover, replacing the filter screen in existing low-NOx burners is inconvenient, making it difficult to maintain air filtration through regular filter screen replacement, thus reducing combustion efficiency; in addition, the shock absorption and cushioning effect of existing low-NOx burners is insufficient, increasing equipment wear and tear, reducing operational stability, and easily leading to noise pollution. Utility Model Content

[0004] The purpose of this invention is to address the problems in the existing low-NOx burner, such as the need for further improvement in sealing and installation, inconvenience in replacing the filter screen, and insufficient shock absorption and buffering effect. Therefore, this invention proposes a low-NOx burner.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A low-NOx burner includes a burner frame, a burner shell mounted on top of the burner frame, an assembly plate mounted on the surface of the burner frame, an installation pipe mounted on the surface of the burner shell, an air inlet hood mounted on the surface of the installation pipe, a filter screen plate disposed inside the air inlet hood, a support mounted on the surface of the burner frame, a shock-absorbing seat mounted on the surface of the support, a combustion chamber disposed on one side of the burner frame, a buffer and shock-absorbing mechanism disposed on the surfaces of the support and the shock-absorbing seat, a convenient replacement mechanism disposed on the surfaces of the air inlet hood and the filter screen plate, and a sealing installation mechanism disposed on the surfaces of the combustion chamber and the assembly plate.

[0006] As a preferred technical solution of this application, the assembly plate is connected to the combustion chamber by mounting bolts, an exhaust pipe is provided on the surface of the burner housing, the exhaust pipe is connected to the burner housing by assembly bolts, a motor housing is provided on the surface of the burner housing, the motor housing is connected to the burner housing by studs, a motor body is installed inside the motor housing, a rotating shaft is installed at the output end of the motor body by a coupling, and a fan is provided inside the burner housing.

[0007] As a preferred technical solution of this application, the mounting pipe is connected to the burner housing by fastening bolts, the support is connected to the burner frame by assembly nails, the bottom end of the shock absorber extends into the interior of the support, an annular pipe is installed inside the exhaust pipe, multiple sets of gas guide pipes are arrayed on the surface of the annular pipe, an ignition rod is installed on the inner wall of the exhaust pipe, an infrared flame detector is installed on the surface of the exhaust pipe, a gas valve assembly is installed on the surface of the burner frame, a gas filter is installed on the surface of the gas valve assembly, a gas inlet pipe is installed on the surface of the gas valve assembly, and a gas pressure gauge is fitted on the surface of the gas inlet pipe.

[0008] As a preferred technical solution of this application, the buffer and shock absorption mechanism includes a buffer block disposed on the surface of the shock absorption seat, a buffer groove disposed on the inner wall of the support and slidingly engaging with the buffer block, a fixed frame disposed on the inner wall of the support, a buffer seat disposed on the surface of the fixed frame, a buffer rotating plate disposed on the surfaces of the buffer seat and the shock absorption seat, and a buffer spring disposed on the surface of the fixed frame.

[0009] As a preferred technical solution of this application, the convenient replacement mechanism includes a fixing block disposed on the surface of the air intake hood, an anti-loosening screw sleeve disposed on the surface of the fixing block, a screw disposed on the surface of the anti-loosening screw sleeve, a mounting plate disposed at the bottom of the screw, a fixing plate disposed on the surface of the filter screen, a locking block disposed on the surface of the mounting plate, and a receiving groove disposed on the inner wall of the air intake hood.

[0010] As a preferred technical solution of this application, the sealing installation mechanism consists of a sealing gasket disposed on the surface of the assembly plate, a sealing sleeve sleeved on the surface of the exhaust pipe, a rubber sealing ring disposed on the inner wall of the sealing sleeve, and an elastic clip disposed on the surface of the sealing sleeve for interlocking with the inner wall of the combustion chamber.

[0011] Compared with the prior art, the present invention provides a low-NOx burner with the following advantages: 1. This low-NOx burner, through its sealed installation mechanism, achieves the functions of preventing high-temperature flue gas leakage, improving combustion efficiency, and reducing pollutant emissions, thus solving the problem that the sealing installation effect in the existing technology needs to be further improved. 2. This low-NOx burner, through its convenient replacement mechanism, enables the filter screen to be replaced periodically to ensure the air filtration effect and further improve its combustion efficiency, thus solving the problem of inconvenient operation when replacing the filter screen in the prior art. 3. This low-NOx burner, through its buffer and shock absorption mechanism, achieves the functions of reducing equipment wear, improving the stability of the low-NOx burner during operation, and reducing noise pollution, thus solving the problem of insufficient shock absorption and buffering effect in existing technologies. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model; Figure 3 This is an enlarged side view sectional diagram of the present invention. Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle; Figure 5 For the present utility model Figure 2 Enlarged structural schematic diagram of the intermediate buffer damping mechanism; Figure 6 For the present utility model Figure 2 An enlarged structural diagram of the mechanism for easy replacement.

[0013] In the picture: 1. Burner frame; 10. Exhaust pipe; 11. Controller; 12. Burner housing; 13. Assembly plate; 14. Air inlet hood; 15. Filter screen; 16. Fan; 17. Gas pressure gauge; 18. Gas inlet pipe; 19. Gas valve assembly; 110. Gas filter; 111. Burner nozzle; 112. Ignition rod; 113. Motor housing; 114. Motor body; 115. Stud; 116. Mounting pipe; 117. Fastening bolt; 118. Support; 1181. Vibration damping seat; 119. Shaft; 120. Assembly nail body; 121. Annular pipe; 122. Gas mixing... 1. Connecting pipe; 123. Mounting bolts; 124. Gas duct; 125. Infrared flame detector; 101. Combustion chamber; 102. Assembly bolts; 2. Buffer and shock absorption mechanism; 21. Buffer block; 22. Buffer groove; 23. Buffer seat; 24. Buffer rotating plate; 25. Fixing bracket; 26. Buffer spring; 3. Easy replacement mechanism; 31. Fixing block; 32. Anti-loosening sleeve; 33. Screw; 34. Receiving groove; 35. Clamping block; 36. Mounting plate; 37. Fixing plate; 4. Sealing installation mechanism; 41. Sealing gasket; 42. Elastic clamp; 43. Sealing sleeve; 44. Rubber sealing ring. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. Example

[0015] Reference Figure 1-4A low-NOx burner includes a burner frame 1, a controller 11 (e.g., LA series) mounted on the surface of the burner frame 1, an assembly plate 13 mounted on the surface of the burner frame 1, a combustion chamber 101 located on one side of the burner frame 1, and the assembly plate 13 connected to the combustion chamber 101 by mounting bolts 123. A burner housing 12 is located above the burner frame 1, and an exhaust pipe 10 is located on the surface of the burner housing 12. The exhaust pipe 10 is connected to the burner housing 12 by assembly bolts 102, with one end of the exhaust pipe 10 penetrating the assembly plate 13 and extending into the combustion chamber 101. A motor housing 113 is located on the surface of the burner housing 12, and the motor housing 113 is connected to the burner housing 12. The two components are connected by studs 115. The motor body 114 is installed inside the motor housing 113. The motor body 114 can be a JO series model. The input end of the motor body 114 is electrically connected to the output end of the controller 11. A rotating shaft 119 is mounted on the output end of the motor body 114 via a coupling. A fan 16 is installed inside the burner housing 12. One end of the rotating shaft 119 is fixed to the surface at the center of the fan 16. A mounting tube 116 is provided on the surface of the burner housing 12. The mounting tube 116 is connected to the burner housing 12 by fastening bolts 117. An air inlet shroud 14 is mounted on the surface of the mounting tube 116. The air inlet shroud 14, the mounting tube 116, and the interior of the burner housing 12 are connected. An internal filter screen 15 is installed. A support 118 is installed on the surface of the burner frame 1, located below the burner housing 12. The support 118 is connected to the burner frame 1 via an assembly nail 120. A shock absorber 1181 is installed on the surface of the support 118, with its bottom end extending into the interior of the support 118 and its top end fixed to the surface at the bottom of the burner housing 12. An annular pipe 121 is installed inside the exhaust pipe 10. Multiple sets of air guide pipes 124 are arrayed on the surface of the annular pipe 121. One end of the air guide pipe 124 extends into the interior of the burner housing 12, and the other end extends into the interior of the annular pipe 121. Multiple air guide pipes 124 are arrayed inside the exhaust pipe 10. The burner assembly 111 has multiple sets of gas mixing tubes 122 arrayed on its surface. One end of each gas mixing tube 122 is connected to the burner assembly 111, and the other end extends into the interior of the annular tube 121. An ignition rod 112, which can be a BWGD series ignition rod, is installed on the inner wall of the exhaust pipe 10. The input end of the ignition rod 112 is electrically connected to the output end of the controller 11. An infrared flame detector 125, which can be a Mitsubishi IR-S type, is installed on the surface of the exhaust pipe 10. The output end of the infrared flame detector 125 is electrically connected to the input end of the controller 11. A gas valve assembly 19 is installed on the surface of the burner frame 1.The input terminal of the gas valve assembly 19 is electrically connected to the output terminal of the controller 11. A gas filter 110 is mounted on the surface of the gas valve assembly 19. A gas inlet pipe 18 is also mounted on the surface of the gas valve assembly 19. One end of the gas inlet pipe 18 passes through the exhaust pipe 10 and extends into the interior of the annular pipe 121. A gas pressure gauge 17 is fitted onto the surface of the gas inlet pipe 18. The gas pressure gauge 17 can be a Y-series model. The input terminal of the gas pressure gauge 17 is electrically connected to the output terminal of the controller 11.

[0016] Reference Figure 2 and Figure 5 Furthermore, the support 118 and the shock absorber 1181 are provided with a buffer and damping mechanism 2. The buffer and damping mechanism 2 includes a buffer block 21 provided on the surface of the shock absorber 1181, a buffer groove 22 provided on the inner wall of the support 118 and slidingly engaged with the buffer block 21, a fixing frame 25 provided on the inner wall of the support 118, a buffer seat 23 provided on the surface of the fixing frame 25, a buffer rotating plate 24 provided on the surfaces of the buffer seat 23 and the shock absorber 1181, and a buffer spring 26 provided on the surface of the fixing frame 25. Two sets of buffer blocks 21 are symmetrically installed on the surface of the shock absorber 1181. The inner wall of the support 118 has two sets of buffer grooves 22 for sliding engagement with the buffer block 21. Multiple sets of fixing brackets 25 are arrayed on the inner wall of the support 118. Two sets of buffer seats 23 are fitted onto the surface of the fixing brackets 25, and the buffer seats 23 slide against the surfaces of the fixing brackets 25. Multiple sets of buffer rotating plates 24 are provided on the surface at the bottom of the shock-absorbing seat 1181, and the buffer rotating plates 24 rotate against the surfaces of the shock-absorbing seat 1181 and the buffer seats 23 respectively. Two sets of buffer springs 26 are fitted onto the surface of the fixing brackets 25, and the other end of the buffer springs 26 is fixed to the surface of the buffer seats 23. By setting up a buffer and shock-absorbing mechanism, equipment wear can be reduced, the stability of the low-NOx burner during operation can be improved, and noise pollution can be reduced.

[0017] Reference Figure 2 and Figure 6Furthermore, the intake hood 14 and the filter screen 15 are provided with a convenient replacement mechanism 3. The convenient replacement mechanism 3 includes a fixing block 31 on the surface of the intake hood 14, an anti-loosening screw sleeve 32 on the surface of the fixing block 31, a screw 33 on the surface of the anti-loosening screw sleeve 32, a mounting plate 36 at the bottom of the screw 33, a fixing plate 37 on the surface of the filter screen 15, a locking block 35 on the surface of the mounting plate 36, and a receiving groove 34 on the inner wall of the intake hood 14. Two sets of fixing blocks 31 are symmetrically installed on the two sides of the intake hood 14, and anti-loosening screw sleeves 32 are installed on the surface of the fixing blocks 31. Two sets of receiving grooves 34 are symmetrically opened on the inner wall of the filter screen 15. Two sets of fixing plates 37 are symmetrically installed on the surface of the filter screen 15. A screw 33 is threadedly connected to the surface of the anti-loosening sleeve 32. The bottom end of the screw 33 passes through the anti-loosening sleeve 32, the fixing block 31 and the air intake hood 14 in sequence and is provided with a mounting plate 36. The mounting plate 36 and the surface of the screw 33 rotate relative to each other. The mounting plate 36 moves into the interior of the fixing plate 37. Two sets of locking blocks 35 are symmetrically installed on the surface of the mounting plate 36. The locking blocks 35 are engaged with the inner wall of the fixing plate 37. The anti-loosening sleeve 32 and the screw 33 cooperate with each other. The diameter of the receiving groove 34 is larger than the diameter of the mounting plate 36. By setting up a convenient replacement mechanism, the air filtration effect can be guaranteed by periodically replacing the filter screen 15, thereby further improving its combustion efficiency.

[0018] Reference Figure 2 and Figure 4 Furthermore, the assembly plate 13 and combustion chamber 101 are provided with a sealing installation mechanism 4. The sealing installation mechanism 4 consists of a sealing gasket 41 on the surface of the assembly plate 13, a sealing sleeve 43 fitted onto the surface of the exhaust pipe 10, a rubber sealing ring 44 on the inner wall of the sealing sleeve 43, and elastic clips 42 on the surface of the sealing sleeve 43 for engaging with the inner wall of the combustion chamber 101. The surface of the assembly plate 13 is fitted with a sealing gasket 41 for sealing between the exhaust pipe 10 and the combustion chamber 101, with the surface of the sealing gasket 41 in close contact with the surface of the combustion chamber 101. The inner wall of the exhaust pipe 10 is fitted with a sealing sleeve 43, and the inner wall of the sealing sleeve 43 is fitted with a rubber sealing ring 44, with the inner wall of the rubber sealing ring 44 in close contact with the surface of the exhaust pipe 10. Two sets of elastic clips 42 are symmetrically installed on the surface of the sealing sleeve 43, engaging with the inner wall of the combustion chamber 101. By providing this sealing installation mechanism, high-temperature flue gas leakage can be prevented, combustion efficiency improved, and pollutant emissions reduced.

[0019] Specifically, when using this low-NOx burner: First, place the burner frame 1 at the designated position on the surface of the combustion chamber 101, and tighten the mounting bolts 123 on the surface of the assembly plate 13. Under the action of the mounting bolts 123, the burner frame 1 is installed on the surface of the combustion chamber 101. At this time, one end of the exhaust pipe 10 moves into the interior of the combustion chamber 101. Poor sealing at the connection between the combustion chamber 101 and the exhaust pipe 10 will cause high-temperature flue gas to overflow, which will not only cause heat loss and reduce combustion efficiency, but may also threaten the safety of surrounding equipment and personnel. Specifically: When the assembly plate 13 is placed on the surface of the combustion chamber 101, the sealing gasket 41 on the surface of the assembly plate 13 and the surface of the combustion chamber 101... With the surface tightly pressed together, the sealing gasket 41 can improve the sealing performance of the burner frame 1 when it is installed on the surface of the combustion chamber 101. When one end of the exhaust pipe 10 moves into the interior of the combustion chamber 101, the elastic clip 42 on the surface of the sealing sleeve 43 automatically snaps into the inner wall of the combustion chamber 101. The rubber sealing ring 44 on the inner wall of the sealing sleeve 43 is squeezed and comes into close contact with the surface of the exhaust pipe 10. Under the combined action of the sealing sleeve 43 and the rubber sealing ring 44, the sealing effect of the exhaust pipe 10 and the combustion chamber 101 during installation can be improved, so as to realize the function of sealing installation of the low-NOx burner. This allows the low-NOx burner to prevent high-temperature flue gas leakage, improve combustion efficiency, and reduce pollutant emissions during use.

[0020] Subsequently, the operator confirmed that the gas pressure was normal, there were no leaks in the pipeline, and the valves opened flexibly. The operator then operated the power button on the controller 11. The controller 11 controlled the motor body 114 inside the motor housing 113 to operate. Under the action of the motor body 114, the rotating shaft 119 and fan 16 rotated. Air entered the burner housing 12 through the air intake shroud 14 and the filter plate 15. Outside air was delivered to the exhaust pipe 10 through the burner housing 12, and then entered the annular pipe 121 through the gas guide pipe 124. Simultaneously, gas entered the annular pipe 121 through the gas valve assembly 19 and the gas intake pipe 18. Impurities in the gas were filtered by the gas filter 110. The air-gas ratio is precisely controlled by the pressure gauge 17, and the gas pressure is monitored by the pressure gauge 17. The air and gas are initially mixed in a turbulent state inside the annular pipe 121. The mixed gas then enters the gas mixing pipe 122 for further mixing, ensuring thorough mixing of air and gas for more uniform combustion and preventing the formation of localized high-temperature zones. The mixed gas is discharged through the burner 111, and the ignition rod 112 is activated to ignite the gas discharged from the burner 111. The ignited gas burns inside the combustion chamber 101. The infrared flame detector 125 monitors the presence and stability of the flame during combustion, enabling timely detection of any abnormalities. Additionally, according to existing technology, an oxygen sensor is also included to monitor the oxygen concentration during combustion; the oxygen sensor is not shown in the diagram. Subsequently, when air enters the burner housing 12 through the air intake hood 14 and the filter plate 15, impurities in the air are filtered by the filter plate 15. When the filter plate 15 is used for a long time, it needs to be replaced periodically to ensure smooth airflow. The user loosens the screw 33, causing the screw 33 to move the mounting plate 36 away from the fixed plate 37. The mounting plate 36 then moves the locking block 35 away from the interior of the fixed plate 37 and into the receiving groove 34. The worker then pulls the filter plate 15 away from the air intake hood 14 to remove the filter. The filter plate 15 is pulled out from inside the intake hood 14 for replacement. After the replaced filter plate 15 is placed inside the intake hood 14, the worker tightens the screw 33, causing the screw 33 to drive the mounting plate 36 to move towards the fixing plate 37. After the mounting plate 36 moves into the fixing plate 37, the locking block 35 on the surface of the mounting plate 36 automatically locks into the inner wall of the fixing plate 37, installing the filter plate 15 inside the intake hood 14. This enables the low-NOx burner to easily replace the filter plate 15, thus ensuring the air filtration effect and further improving its combustion efficiency by periodically replacing the filter plate 15.

[0021] Subsequently, when the motor body 114 drives the fan 16 to work, the burner housing 12 and the burner frame 1 will generate slight vibrations. Long-term vibration will cause the components of the burner frame 1 and the burner housing 12 to loosen and wear. When the vibration is transmitted to the surface of the shock absorber seat 1181, the shock absorber seat 1181 drives the buffer block 21 to move slightly inside the buffer groove 22, and the buffer rotating plate 24 drives the buffer seat 23 to move on the surface of the fixed frame 25. Under the action of the buffer rotating plate 24 and the buffer seat 23, the buffer spring 26 is compressed. Under the action of the buffer spring 26, The force from the buffer seat 23 is unloaded and buffered, allowing the buffer seat 23 to slide on the surface of the fixed frame 25 to unload the force. Under the action of the buffer spring 26, the vibration force generated by the burner frame 1 and the burner housing 12 can be unloaded and buffered. At the same time, the noise generated by the motor body 114 and the fan 16 during operation can be reduced, so as to realize the vibration damping function of the low-NOx burner. This reduces the wear and tear of the equipment during the use of the low-NOx burner, improves the stability of the low-NOx burner during operation, reduces noise pollution, and finally completes the use of the low-NOx burner.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A low-NOx burner, comprising a burner frame (1), characterized in that: A burner housing (12) is provided on the top of the burner frame (1). An assembly plate (13) is installed on the surface of the burner frame (1). An installation pipe (116) is provided on the surface of the burner housing (12). An air intake hood (14) is installed on the surface of the installation pipe (116). A filter screen plate (15) is provided inside the air intake hood (14). A support (118) is provided on the surface of the burner frame (1). A shock-absorbing seat (1181) is provided on the surface of the support (118). A combustion chamber (101) is provided on one side of the burner frame (1). A buffer shock-absorbing mechanism (2) is provided on the surface of the support (118) and the shock-absorbing seat (1181). A convenient replacement mechanism (3) is provided on the surface of the air intake hood (14) and the filter screen plate (15). A sealing installation mechanism (4) is provided on the surface of the combustion chamber (101) and the assembly plate (13).

2. A low-NOx burner according to claim 1, characterized in that: The assembly plate (13) is connected to the combustion chamber (101) by mounting bolts (123). The surface of the burner housing (12) is provided with an exhaust pipe (10). The exhaust pipe (10) is connected to the burner housing (12) by assembly bolts (102). The surface of the burner housing (12) is provided with a motor box (113). The motor box (113) is connected to the burner housing (12) by studs (115). The motor body (114) is installed inside the motor box (113). The output end of the motor body (114) is connected with a rotating shaft (119) by a coupling. The inside of the burner housing (12) is provided with a fan (16).

3. A low-NOx burner according to claim 2, characterized in that: The mounting pipe (116) is connected to the burner housing (12) by fastening bolts (117), the support (118) is connected to the burner frame (1) by assembly nails (120), the bottom end of the shock absorber seat (1181) extends into the interior of the support (118), an annular pipe (121) is installed inside the exhaust pipe (10), multiple sets of gas guide pipes (124) are arrayed on the surface of the annular pipe (121), an ignition rod (112) is installed on the inner wall of the exhaust pipe (10), an infrared flame detector (125) is installed on the surface of the exhaust pipe (10), a gas valve assembly (19) is installed on the surface of the burner frame (1), a gas filter (110) is installed on the surface of the gas valve assembly (19), a gas inlet pipe (18) is installed on the surface of the gas valve assembly (19), and a gas pressure gauge (17) is fitted on the surface of the gas inlet pipe (18).

4. A low-NOx burner according to claim 1, characterized in that: The buffer and shock absorption mechanism (2) includes a buffer block (21) disposed on the surface of the shock absorption seat (1181), a buffer groove (22) disposed on the inner wall of the support (118) and slidingly engaged with the buffer block (21), a fixed frame (25) disposed on the inner wall of the support (118), a buffer seat (23) disposed on the surface of the fixed frame (25), a buffer rotating plate (24) disposed on the surfaces of the buffer seat (23) and the shock absorption seat (1181), and a buffer spring (26) disposed on the surface of the fixed frame (25).

5. A low-NOx burner according to claim 1, characterized in that: The convenient replacement mechanism (3) includes a fixing block (31) on the surface of the air intake hood (14), an anti-loosening screw sleeve (32) on the surface of the fixing block (31), a screw (33) on the surface of the anti-loosening screw sleeve (32), a mounting plate (36) at the bottom of the screw (33), a fixing plate (37) on the surface of the filter screen plate (15), a locking block (35) on the surface of the mounting plate (36), and a receiving groove (34) on the inner wall of the air intake hood (14).

6. A low-NOx burner according to claim 1, characterized in that: The sealing installation mechanism (4) consists of a sealing gasket (41) disposed on the surface of the assembly plate (13), a sealing sleeve (43) sleeved on the surface of the exhaust pipe (10), a rubber sealing ring (44) disposed on the inner wall of the sealing sleeve (43), and an elastic clip (42) disposed on the surface of the sealing sleeve (43) for engaging with the inner wall of the combustion chamber (101).

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