Low-nitrogen 15T burner suitable for high-heat boilers and working method thereof

Abstract

The present application relates to the technical field of burner, disclose a kind of low-nitrogen 15T burner suitable for high heat boiler and its working method, low-nitrogen 15T burner includes burner, burner includes air bin, and air bin is installed with connecting cylinder and air inlet, connecting cylinder is installed with combustion cylinder, the inside of connecting cylinder is further equipped with gas bin, and gas bin is installed with main gas inlet, gas bin is installed with flame stabilizer plate.The present application is realized by the partition setting of air bin, gas bin and the connecting effect of connecting cylinder, realizes the partition delivery of air and gas, so that in combustion process, air and gas can be stably supplied according to design requirement, effectively improve the stability of combustion process;And, gas and well-distributed air are mixed and burned in combustion cylinder according to the requirement of staged combustion, reduce overall combustion temperature, inhibit the generation of nitrogen oxides from the source, provide strong guarantee for realizing ultra-low nitrogen emission.

Description

Technical Field

[0001] This invention relates to the field of burner technology, and more specifically, to a low-NOx 15T burner suitable for high-heat boilers and its operating method. Background Technology

[0002] The 15T burner is a 15-ton boiler burner. High-calorific-value boilers play a crucial role in industrial production and energy supply, and are widely used in power, chemical, and heating industries. With increasingly stringent environmental protection requirements, nitrogen oxides (NOx) are becoming increasingly important. x Emissions have become a critical issue that must be addressed in burner design and application. Traditional burners, due to excessively high combustion temperatures and a lack of effective control measures, easily generate large amounts of nitrogen oxides during combustion. These nitrogen oxides, when released into the atmosphere, contribute to environmental problems such as acid rain and photochemical smog, posing serious threats to the ecological environment and human health.

[0003] However, most traditional burners do not employ staged combustion technology, making precise control of the combustion process difficult. In single combustion mode, the air-fuel mixture is not ideal, often resulting in localized high-temperature zones. Specifically, traditional burners lack staged control of the combustion process, making it difficult to flexibly adjust according to different boiler loads and operating conditions. Under low load conditions, the inability to precisely adjust combustion intensity leads to incomplete combustion, wasting energy and generating more pollutants. Under high load conditions, localized overheating can cause a sharp increase in the formation rate of nitrogen oxides in these high-temperature zones, further exacerbating emissions problems. Summary of the Invention

[0004] This invention provides a low-NOx 15T burner suitable for high-heat boilers and its operating method, solving the problem that most traditional burners in related technologies do not employ staged combustion technology, making it difficult to precisely control the combustion process. In single combustion mode, the air-fuel mixture is not sufficiently balanced, often resulting in localized high-temperature zones. In these high-temperature zones, the formation rate of nitrogen oxides increases dramatically, further exacerbating the technical problem of nitrogen oxide emissions.

[0005] The first aspect of this invention discloses a low-NOx 15T burner suitable for high-heat boilers, comprising a burner body, an air chamber with a connecting cylinder and an air inlet, a combustion cylinder mounted on the connecting cylinder, and a gas chamber inside the connecting cylinder with a main gas inlet and a flame stabilizer plate. The air chamber serves as a storage and distribution space for air, introducing air through the air inlet to provide the necessary oxygen source for staged combustion and initially distributing the air according to the requirements of staged combustion. The gas chamber is used to store and distribute gas, realizing zoned delivery of air and gas to avoid mutual interference before entering the combustion cylinder, thereby ensuring the precise ratio and stable supply of air and gas in different combustion zones during staged combustion.

[0006] As a further optimization of the present invention, the gas chamber is provided with a ring of nozzle kits for injecting gas.

[0007] As a further optimization of the present invention, a first servo motor and a fan are provided at the air inlet, and a second servo motor and a gas supply valve group are provided at the main gas inlet. The first servo motor and the second servo motor control the operation of the fan and the gas supply valve group respectively, so as to control the delivery of air and gas into the combustion chamber, thereby achieving precise regulation of air and gas.

[0008] As a further optimization of the present invention, the nozzle kit includes a first nozzle and a second nozzle. The first nozzle has an opening inside, and a plug is engaged with the opening. A fastening bolt is threaded onto the first nozzle, and one end of the fastening bolt passes through the opening and is threadedly connected to the plug.

[0009] As a further optimization of the present invention, an angle adjustment unit is provided between the gas chamber and the nozzle assembly. The angle adjustment unit includes a drive ring connected to the gas chamber by a bearing, and an external gear ring is installed on the drive ring. Multiple first gears are meshed on the external gear ring, and the first gears are bearing connected to the outer surface of the gas chamber. An internal gear ring is also installed on the drive ring, and a second gear is meshed on the internal gear ring. A connecting shaft is installed on the second gear, and the connecting shaft extends through the gas chamber to the outer surface of the gas chamber. A drive motor is installed on the connecting cylinder, and both the drive motor and the connecting shaft are equipped with bevel teeth, and the two sets of bevel teeth are meshed together.

[0010] As a further optimization of the present invention, the first gear corresponds one-to-one with the nozzle kit, a connecting plate is installed inside the first gear, and a flow cavity is opened in the connecting plate, the flow cavity being connected to the first nozzle.

[0011] As a further optimization of the present invention, the first nozzle and the second nozzle are provided with a clogging removal unit. The clogging removal unit includes an impeller disposed inside the first nozzle and a dispersion plate disposed inside the second nozzle. The dispersion plate is provided with a plurality of dispersion holes.

[0012] As a further optimization of the present invention, the unclogging unit further includes a reciprocating screw connected to the inside of the first nozzle by a bearing, and a screw pair is provided on the reciprocating screw. A connecting frame is symmetrically installed on the screw pair, and the connecting frame is fixedly connected to the dispersion plate. The reciprocating screw is fixedly connected to the impeller.

[0013] As a further optimization of the present invention, a scraper is installed on the dispersion plate, and the scraper is inclined.

[0014] The second aspect of this invention discloses a method for operating a low-NOx 15T burner suitable for high-heat boilers, the steps of which are as follows:

[0015] S1. Air and gas are delivered in zones through air inlet and main gas inlet;

[0016] S2. The gas is injected into the combustion chamber through multiple nozzle kits distributed in a ring outside the gas chamber;

[0017] S3. The angle adjustment unit precisely adjusts the injection angle of each nozzle assembly to adapt to different staged combustion conditions;

[0018] S4. The gas with the adjusted injection angle is mixed and burned with the distributed air in the combustion chamber according to the requirements of staged combustion. The flame stabilizer plate stabilizes the flame, ensuring a precise ratio and stable supply of air and gas in different combustion zones, thus achieving stable staged combustion.

[0019] The beneficial effects of this invention are as follows: By partitioning the air chamber and gas chamber and connecting them with a connecting cylinder, this invention achieves partitioned delivery of air and gas, avoiding mutual interference between the two. This ensures that air and gas are stably supplied according to design requirements during combustion, providing a foundation for stable and efficient combustion and effectively improving the stability of the combustion process. The multiple nozzle kits distributed in a ring around the gas chamber allow the gas chamber to supply gas to each nozzle kit relatively evenly, enabling multiple nozzle kits to inject gas simultaneously and stably. Furthermore, the gas and the allocated air are mixed and burned in the combustion chamber according to the requirements of staged combustion, reducing the overall combustion temperature and the formation of high-temperature zones, thus inhibiting the generation of nitrogen oxides from the source and providing a strong guarantee for achieving ultra-low nitrogen emissions. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;

[0021] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;

[0022] Figure 3 This is a three-dimensional cross-sectional structural schematic diagram of the present invention;

[0023] Figure 4 This is a schematic diagram of the planar structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the three-dimensional structure of the angle adjustment unit of the present invention. Figure 1 ;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of the angle adjustment unit of the present invention. Figure 2 ;

[0026] Figure 7 This is a partial three-dimensional structural diagram of the nozzle kit of the present invention;

[0027] Figure 8 This is a cross-sectional view of the nozzle kit of the present invention;

[0028] Figure 9 This is a three-dimensional cross-sectional view of the nozzle kit of the present invention;

[0029] Figure 10 This is a three-dimensional structural diagram of the unblocking unit of the present invention.

[0030] In the diagram: 100, burner body; 110, air chamber; 120, connecting cylinder; 130, air inlet; 140, combustion chamber; 150, gas chamber; 160, main gas inlet; 170, flame stabilizer; 180, nozzle kit; 181, first nozzle; 182, second nozzle; 183, insert block; 184, fastening bolt; 200, angle adjustment unit; 210, drive ring; 220, external gear ring; 230, first gear; 240, connecting plate; 241, flow chamber; 250, internal gear ring; 260, second gear; 270, connecting shaft; 280, drive motor; 290, bevel gear; 300, unclogging unit; 310, reciprocating lead screw; 320, lead screw pair; 330, connecting frame; 340, dispersion plate; 341, dispersion hole; 350, scraper; 360, impeller. Detailed Implementation

[0031] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and implement the subject matter described herein, and changes may be made to the function and arrangement of the elements discussed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the examples. Furthermore, features described in some examples may be combined in other examples.

[0032] Example 1, according to Appendix Figures 1 to 4 As shown, a low-NOx 15T burner suitable for high-heat boilers includes a burner body 100. The burner body 100 includes an air chamber 110, a connecting cylinder 120 and an air inlet 130 are installed on the air chamber 110, a combustion cylinder 140 is installed on the connecting cylinder 120, a gas chamber 150 is provided inside the connecting cylinder 120, and a main gas inlet 160 is installed on the gas chamber 150. The main gas inlet 160 extends to the outer surface of the connecting cylinder 120 and is fixedly connected to the connecting cylinder 120.

[0033] The air chamber 110 serves as a storage and distribution space for air, introducing air through the air inlet 130 to provide the necessary oxygen for combustion. The connecting cylinder 120 connects the air chamber 110 and the combustion chamber 140, and also houses the gas chamber 150, enabling the separate delivery of air and gas to avoid mutual interference and ensure the stability of the combustion process. The combustion chamber 140 provides a specific space for the mixing and combustion of gas and air, which is conducive to forming a stable and efficient combustion flame.

[0034] In addition, a flame stabilizer plate 170 is installed on the gas chamber 150. The flame stabilizer plate 170 installed on the gas chamber 150 can stabilize the flame and prevent unstable phenomena such as flame detachment and backfire. By changing the flow state of the airflow, the flame can be kept burning stably in a specific position, thereby improving the safety and reliability of combustion.

[0035] Specifically, the gas chamber 150 has multiple nozzle kits 180 for injecting gas arranged in a ring around its exterior. The main gas inlet 160 introduces gas into the gas chamber 150, which stores and initially distributes the gas, ensuring that the gas can be supplied to each nozzle kit 180 relatively evenly. This guarantees that multiple nozzle kits 180 can inject gas simultaneously and stably, improving the uniformity and efficiency of combustion.

[0036] It should be noted that during operation, a first servo motor and a fan are installed at the air inlet 130, and a second servo motor and a gas supply valve group are installed at the main gas inlet 160, thereby achieving precise regulation of air and gas.

[0037] It should be noted that in this embodiment, by using the internal and external flame staged combustion technology, combined with the precise control of the internal and external flames by a separate servo motor, a significant reduction in nitrogen oxide emissions is achieved. The staged combustion strategy makes the combustion process more efficient and environmentally friendly, effectively reducing the nitrogen oxide content in the exhaust gas and achieving the standard of ultra-low nitrogen emissions.

[0038] Furthermore, a programmable control system was introduced, which can simultaneously control multiple servo motors, enabling precise adjustment and matching of parameters such as air, fuel gas, and flue gas. This not only improves the system's response speed and accuracy but also makes operation more convenient and reduces the need for manual intervention. The programmable control system precisely controls the return flow of FGR (flue gas recirculation), optimizes the mixed gas composition in the combustion chamber, and further reduces the generation of nitrogen oxides during combustion. Individual servo motors control the combustion of the inner and outer flames respectively, enabling independent adjustment of flame shape and combustion intensity.

[0039] The programmable control system uses oxygen content sensors, fuel gas flow sensors, nitrogen oxide sensors, and flue gas flow and temperature sensors to precisely control the air, fuel gas, and FGR flue gas recirculation flow. This ensures that the air-to-fuel ratio is always maintained at an optimal level during combustion, and by rationally adjusting the FGR flue gas recirculation flow to reduce combustion temperature, the formation of nitrogen oxides is significantly suppressed. This easily meets the stringent standards for ultra-low nitrogen emissions, effectively reducing environmental pollution.

[0040] For example, under different boiler loads, the programmable control system can quickly adjust the supply ratio of air and gas to avoid the generation of large amounts of nitrogen oxides due to incomplete combustion or local high temperatures.

[0041] The internal and external flame staged combustion technology divides the combustion process into an inner flame in the central region and an outer flame in the outer layer, reducing the overall combustion temperature. The inner and outer flames are each controlled by an independent servo motor, and the programmable control system can precisely adjust the combustion intensity and flame shape of the inner and outer flames based on real-time nitrogen oxide emission monitoring values. This precise control further reduces the formation of high-temperature zones, thereby significantly reducing nitrogen oxide emissions.

[0042] For example, when operating at low load, the combustion intensity of the outer flame can be appropriately reduced to decrease the high-temperature zone and reduce the generation of nitrogen oxides; when operating at high load, the amount of fuel gas and air in the inner and outer flames can be reasonably allocated to ensure combustion efficiency while controlling nitrogen oxide emissions.

[0043] Example 2: According to the appendix Figures 5 to 8As shown, the nozzle kit 180 includes a first nozzle 181 and a second nozzle 182. The first nozzle 181 has an internal slot, and a plug block 183 is engaged within the slot. A fastening bolt 184 is threaded onto the first nozzle 181, with one end of the bolt passing through the slot and threadedly connected to the plug block 183. In this embodiment, the engagement of the plug block 183 with the slot allows for quick assembly and positioning of the first nozzle 181 and the second nozzle 182, and also facilitates quick disassembly of the first nozzle 181 and the second nozzle 182, thus simplifying subsequent replacement. Specifically, when the nozzle kit 180 needs repair, parts replacement, or cleaning and maintenance, the operator only needs to loosen the fastening bolt 184 to easily separate the first nozzle 181 and the second nozzle 182, without the need for complex tools or cumbersome operations, reducing the difficulty and cost of maintenance.

[0044] Example 3, according to Appendix Figure 5 , Figure 6 and Figure 8 As shown, the angle adjustment unit 200 includes a drive ring 210 connected to the gas chamber 150 by a bearing, and an external gear ring 220 is mounted on the drive ring 210. Multiple first gears 230 are meshed on the external gear ring 220, and the first gears 230 are bearing connected to the outer surface of the gas chamber 150. An internal gear ring 250 is also mounted on the drive ring 210, and a second gear 260 is meshed on the internal gear ring 250. A connecting shaft 270 is mounted on the second gear 260, and the connecting shaft 270 extends through the gas chamber 150 to the outer surface of the gas chamber 150. A drive motor 280 is mounted on the connecting cylinder 120, and bevel teeth 290 are mounted at the output shaft position of the drive motor 280 and on the connecting shaft 270. The two sets of bevel teeth 290 are meshed together.

[0045] Furthermore, the first gear 230 corresponds one-to-one with the nozzle assembly 180. A connecting plate 240 is installed inside the first gear 230, and a flow cavity 241 is opened inside the connecting plate 240. The flow cavity 241 is connected to the first nozzle 181.

[0046] In this embodiment, the first gear 230 corresponds one-to-one with the nozzle assembly 180, and the connecting disc 240 inside the first gear 230 is connected to the first nozzle 181. The injection angle of each nozzle assembly 180 can be precisely controlled by the angle adjustment unit 200. This allows the burner 100 to flexibly adjust the injection direction of the gas according to the actual operating conditions and combustion requirements of the boiler, optimize the mixing effect of gas and air, further improve combustion efficiency, and reduce nitrogen oxide emissions.

[0047] In addition, the nozzle kit 180 can be adjusted in real time according to different combustion conditions and boiler loads, so that the gas and air can achieve the best mixing ratio and mixing effect in the combustion tube 140, thereby improving combustion efficiency, reducing the generation of incomplete combustion products, reducing nitrogen oxide emissions, and meeting the requirements of low-NOx combustion.

[0048] During operation, the drive motor 280 is controlled to rotate, and the connecting shaft 270 is controlled to rotate through the meshing connection of two sets of bevel teeth 290. When the internal gear ring 250 and the second gear 260 are meshed, the drive ring 210 is controlled to rotate, thereby causing the external gear ring 220 to rotate. Through the meshing connection between the external gear ring 220 and the first gear 230, the nozzle assembly 180 is driven to rotate, thereby causing the angle of the second nozzle 182 to change.

[0049] In summary, under the control of the programmable control system, the angle adjustment unit 200 can precisely adjust the injection angle of the nozzle assembly 180 according to the combustion conditions, ensuring thorough mixing of the gas and air. This not only improves combustion efficiency and reduces the generation of incomplete combustion products, but also ensures combustion stability. Simultaneously, the unblocking unit 300 ensures unobstructed nozzle flow, further promoting uniform gas injection and good mixing with air. For example, under different airflow rates and gas pressures, the programmable control system can adjust the nozzle angle to achieve optimal mixing of gas and air within the combustion chamber 140.

[0050] Example 4, according to Appendix Figure 8 , Figure 9 and Figure 10 As shown, the unclogging unit 300 includes an impeller 360 disposed inside the first nozzle 181 and a dispersion plate 340 disposed inside the second nozzle 182, the dispersion plate 340 having a plurality of dispersion holes 341.

[0051] It is important to understand that the dispersion holes 341 on the dispersion plate 340 can divide the gas into multiple fine streams. Compared with a single large stream of gas, these fine streams increase the contact area between the gas and air, allowing the gas to mix with the surrounding air more quickly and thoroughly after leaving the nozzle. This helps to improve the completeness of combustion and reduce the formation of incomplete combustion products. Specifically, the uniform mixing of gas and air can form a stable flame, which can better maintain the continuity of the combustion process, reduce flame flickering, shaking, and other unstable phenomena, improve the stability and reliability of combustion, and also help to improve the working performance and service life of the burner 100.

[0052] The impeller's 360-degree rotation also disturbs the flow of the combustion gas, creating a more turbulent flow field before it enters the dispersion plate 340. This facilitates more uniform mixing of the gas and air after passing through the dispersion holes 341, preventing localized excessively high or low gas concentrations and ensuring a more uniform and stable combustion reaction throughout the combustion zone. Furthermore, the more thorough and uniform mixing of gas and air allows for a faster combustion reaction. More gas molecules and oxygen molecules can contact and react promptly, accelerating the combustion speed and completing the combustion process in a shorter time, thus improving combustion efficiency and reducing energy waste.

[0053] According to the appendix Figure 10 As shown, the unblocking unit 300 also includes a reciprocating screw 310 with a bearing connected inside the first nozzle 181, and a screw pair 320 is provided on the reciprocating screw 310. A connecting frame 330 is symmetrically installed on the screw pair 320, and the connecting frame 330 is fixedly connected to the dispersing plate 340. The reciprocating screw 310 is fixedly connected to the impeller 360.

[0054] It should be noted that when the gas passes through the first nozzle 181, it drives the impeller 360 to rotate. The impeller 360 drives the reciprocating screw 310, which is fixedly connected to it, to rotate. The lead screw pair 320 on the reciprocating screw 310 performs reciprocating linear motion under the rotation of the reciprocating screw 310, which drives the dispersion plate 340 to perform reciprocating motion within the second nozzle 182 through the connecting frame 330. In this embodiment, the reciprocating motion of the dispersion plate 340 can also prevent the dispersion hole 341 from being blocked by dirt, ensuring the normal injection of gas.

[0055] Furthermore, a scraper 350 is installed on the dispersing plate 340, and the scraper 350 is inclined. During the reciprocating motion of the dispersing plate 340, the inclined scraper 350 can scrape the inner wall of the second nozzle 182, promptly removing dirt and carbon deposits from the inner wall, preventing dirt accumulation that could lead to nozzle blockage, ensuring unobstructed nozzle flow and stable spraying effect, extending nozzle lifespan, and reducing maintenance costs.

[0056] Example 5, according to Appendix Figures 1 to 10 As shown, a working method for a low-NOx 15T burner suitable for high-heat boilers includes the following steps:

[0057] S1. Air and gas are transported in separate zones through air inlet 130 and main gas inlet 160;

[0058] S2. The gas is injected into the combustion chamber 140 through multiple nozzle kits 180 distributed in a ring outside the gas chamber 150;

[0059] S3. The angle adjustment unit 200 precisely adjusts the 180° injection angle of each nozzle kit to adapt to different staged combustion conditions.

[0060] S4. The gas with the adjusted injection angle and the distributed air are mixed and burned in the combustion tube 140 according to the requirements of staged combustion. The flame stabilizer 170 stabilizes the flame, ensuring the precise ratio and stable supply of air and gas in different combustion zones, thus achieving stable staged combustion.

[0061] The embodiments of this specific implementation have been described above. However, this embodiment is not limited to the specific implementation described above. The specific implementation described above is merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this embodiment, all of which are within the protection scope of this embodiment.

Claims

1. A low-NOx 15T burner suitable for high-heat boilers, characterized in that, include: The burner body (100) includes an air chamber (110), and a connecting cylinder (120) and an air inlet (130) are installed on the air chamber (110). A combustion cylinder (140) is installed on the connecting cylinder (120). A gas chamber (150) is also provided inside the connecting cylinder (120), and a main gas inlet (160) is installed on the gas chamber (150). A flame stabilizer (170) is installed on the gas chamber (150), and multiple nozzle kits (180) are provided outside the gas chamber (150). The nozzle kit (180) includes a first nozzle (181) and a second nozzle (182). The first nozzle (181) has an opening inside, and a plug (183) is engaged inside the opening. The plug (183) is fixedly connected to the second nozzle (182). A fastening bolt (184) is threaded on the first nozzle (181), and one end of the fastening bolt (184) passes through the opening and is threaded to the plug (183). The air chamber (110) serves as a storage and distribution space for air. Air is introduced through the air inlet (130) to provide the necessary oxygen source for staged combustion and to initially distribute the air according to the requirements of staged combustion. The gas chamber (150) is used to store and distribute gas, realize the zoned delivery of air and gas, avoid mutual interference before entering the combustion chamber (140), so as to ensure the precise ratio and stable supply of air and gas in different combustion zones during the staged combustion process. An angle adjustment unit (200) is provided between the gas chamber (150) and the nozzle assembly (180). The angle adjustment unit (200) includes a drive ring (210) connected to the gas chamber (150) by a bearing, and an external gear ring (220) is mounted on the drive ring (210). A plurality of first gears (230) are meshed on the external gear ring (220), and the first gears (230) are bearing connected to the outer surface of the gas chamber (150). The drive ring (210) is also equipped with... An internal gear ring (250) is provided, and a second gear (260) is meshed on the internal gear ring (250). A connecting shaft (270) is mounted on the second gear (260), and the connecting shaft (270) extends through the gas chamber (150) to the outer surface of the gas chamber (150). A drive motor (280) is mounted on the connecting cylinder (120), and both the drive motor (280) and the connecting shaft (270) are equipped with bevel teeth (290). The two sets of bevel teeth (290) are meshed together. The first gear (230) corresponds one-to-one with the nozzle kit (180). A connecting plate (240) is installed inside the first gear (230), and a flow cavity (241) is opened inside the connecting plate (240). The flow cavity (241) is connected to the first nozzle (181). The first nozzle (181) and the second nozzle (182) are provided with a blockage clearing unit (300). The blockage clearing unit (300) includes an impeller (360) disposed inside the first nozzle (181) and a dispersion plate (340) disposed inside the second nozzle (182). The dispersion plate (340) is provided with a plurality of dispersion holes (341). The unblocking unit (300) further includes a reciprocating screw (310) connected to the inside of the first nozzle (181) by a bearing, and a screw pair (320) is provided on the reciprocating screw (310). A connecting frame (330) is symmetrically installed on the screw pair (320), and the connecting frame (330) is fixedly connected to the dispersing plate (340). The reciprocating screw (310) is fixedly connected to the impeller (360). A scraper (350) is installed on the dispersion plate (340), and the scraper (350) is inclined.

2. A low-NOx 15T burner suitable for high-heat boilers according to claim 1, characterized in that, Multiple nozzle kits (180) are arranged in a ring, and the nozzle kits (180) are used to inject gas.

3. A low-NOx 15T burner suitable for high-heat boilers according to claim 1, characterized in that, A first servo motor and a fan are provided at the air inlet (130), and a second servo motor and a gas supply valve group are provided at the main gas inlet (160). The first servo motor and the second servo motor control the operation of the fan and the gas supply valve group respectively, so as to control the delivery of air and gas into the combustion cylinder (140), thereby achieving precise regulation of air and gas.

4. A method for operating a low-NOx 15T burner suitable for high-calorific-weight boilers, using a low-NOx 15T burner suitable for high-calorific-weight boilers as described in any one of claims 1-3, characterized in that... The steps are as follows: S1. Air and gas are transported in zones through air inlet (130) and main gas inlet (160); S2. The gas is injected into the combustion chamber (140) through multiple nozzle kits (180) distributed in a ring outside the gas chamber (150); S3. The injection angle of each nozzle kit (180) is precisely adjusted by the angle adjustment unit (200) to adapt to different staged combustion conditions; S4. The gas and the distributed air, after the injection angle has been adjusted, are mixed and burned in the combustion tube (140) according to the requirements of staged combustion. The flame stabilizer (170) stabilizes the flame, ensuring the precise ratio and stable supply of air and gas in different combustion zones, and achieving stable staged combustion.

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