A micro-mix burner with adjustable air swirl

Abstract

The present invention discloses a micro-mixing burner with adjustable air swirl, wherein a fuel chamber, an air chamber and a combustion chamber are coaxially and sealedly arranged from bottom to top, a plurality of nozzle assemblies are fixedly arranged in the air chamber, and the plurality of nozzle assemblies are symmetrically arranged in a ring-shaped multi-layer array structure relative to the center of the air chamber; the nozzle assembly comprises a coaxially arranged air guide component, a tangential swirl component, a fuel pipe and a mixing pipe. The present invention can achieve different swirls of a single nozzle through the joint adjustment mechanism of the air guide component and the tangential swirl component, thereby adapting to fuels of different properties, and can stagger different air swirls for nozzle assemblies of different layers according to different working conditions, or stagger different air swirls for multiple nozzle assemblies of the same layer, so as to realize the staged coupled combustion of multiple nozzle assemblies in a large space, and achieve the purpose of strengthening combustion stability and improving temperature uniformity.

Description

Technical Field

[0001] The invention relates to a micro-mixing burner, in particular to a micro-mixing burner with adjustable air swirl, belonging to the technical field of gas turbines. Background Art

[0002] A gas turbine is an internal combustion power machine that uses a continuously flowing gas as a working fluid to drive the impeller to rotate at high speed, converting the energy of the fuel into useful work. It is a rotating impeller heat engine that is widely used in the power industry, petrochemical industry, aerospace, shipbuilding, military and other fields. The gas turbine cycle, which consists of only three major components: the compressor, the combustion chamber and the gas turbine, is generally called a simple cycle, and most gas turbines use a simple cycle scheme. The working principle of the gas turbine: the compressor continuously inhales air from the atmosphere and compresses it; the compressed air enters the combustion chamber, and after mixing with the injected fuel through the combustion device, it burns to become high-temperature combustion gas, and then flows into the gas turbine to expand and work, driving the turbine impeller to rotate with the compressor impeller; while the high-temperature combustion gas drives the gas turbine to work and drive the compressor, there is still residual work as the output mechanical work of the gas turbine. As one of the core components of the gas turbine, the performance of the combustion chamber directly determines the efficiency and emission level of the gas turbine. It has become a top priority to develop combustion technology with high combustion efficiency and low pollutant emissions.

[0003] As an advanced combustion method, micro-mixed combustion technology can effectively reduce the emission of nitrogen oxides (NOx) and improve combustion efficiency by mixing fuel and air on a micro scale. However, commonly used fuels such as hydrogen, methane, propane, ammonia, etc. have great differences in fuel properties, which leads to great differences in the combustion process. Therefore, micro-mixed burners in the prior art often have problems such as poor fuel adaptability and narrow combustion stability range. In order to meet the development needs of micro-mixed burners in terms of fuel adaptability and NOx emissions, in the process of developing and designing new micro-mixed burners, it is necessary not only to consider the diversification of fuels, but also to ensure wide load operation performance, that is, high combustion efficiency, high combustion stability and low pollutant emissions. Therefore, how to achieve the micro-mixed burner of a gas turbine to adjust the combustion process according to the difference in fuel properties in a multi-fuel application scenario, and then maintain a wide range of stable combustion and produce extremely low pollutant emissions, is an urgent problem to be solved in the industry. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides a micro-mixing burner with adjustable air swirl, which can achieve clean, stable and efficient combustion of a variety of fuels, and can solve the problems of poor fuel adaptability, narrow stable combustion range and high NOx emissions in the combustion chamber of traditional gas turbines in the prior art.

[0005] To achieve the above purpose, the micro-mixing burner with adjustable air swirl is provided with a fuel chamber, an air chamber and a combustion chamber coaxially and sealed from bottom to top, the fuel chamber and the air chamber are separated by a fuel chamber top plate, the air chamber and the combustion chamber are separated by a top partition plate, a middle partition plate is also provided in the air chamber, a plurality of nozzle assemblies are fixedly arranged in the air chamber, and the plurality of nozzle assemblies are symmetrical with respect to the center of the air chamber to form a ring-shaped multi-layer array structure;

[0006] A fuel intake passage is provided on the fuel chamber;

[0007] An air intake passage is provided on the air cavity;

[0008] The nozzle assembly includes an air guide component, a tangential swirl component, a fuel pipe and a mixing pipe which are coaxially arranged;

[0009] The tangential swirl component is a blind hole sleeve structure with a blind hole coaxially arranged inside, and the opening position of the blind hole is located at the top of the tangential swirl component, the bottom end of the tangential swirl component is sealed and fixedly connected to the top plate of the fuel chamber, and the top end of the tangential swirl component is sealed and fixedly connected to the middle partition of the air chamber, and the blind hole of the tangential swirl component forms a primary mixing chamber, and multiple groups of air tangential swirl structures are evenly distributed on the outer wall of the primary mixing chamber along its axial direction, and each group of air tangential swirl structures includes a tangential swirl channel with a swirl angle, and the tangential swirl channel runs through the outer wall of the primary mixing chamber, the outer end of the tangential swirl channel is an air swirl inlet, and the inner end is an air swirl outlet, and the swirl angles of the tangential swirl channels of the multiple groups of air tangential swirl structures are different;

[0010] The air guide component of the overall ring structure is axially positioned and rotatably mounted on the tangential swirl component, and multiple air guide components are arranged corresponding to and facing multiple groups of air tangential swirl structures. The position of the air guide component corresponding to the tangential swirl channel is provided with an air straight flow channel penetrating the air guide component;

[0011] The fuel pipe is a blind hole sleeve structure with a blind hole coaxially arranged inside, and the opening position of the blind hole is located at the bottom end of the fuel pipe, the blind hole of the fuel pipe forms a fuel channel, the bottom end of the fuel pipe passes through the bottom end of the tangential swirl component, and is sealed and fixedly installed with the tangential swirl component, the top end of the fuel pipe protrudes and extends to the outside of the top end of the tangential swirl component, and a radial fuel outlet is arranged at a position on the fuel channel corresponding to the primary mixing chamber of the tangential swirl component;

[0012] The bottom end of the mixing tube of the straight tube structure is sealed and fixedly connected to the top end of the primary mixing chamber of the tangential swirl component and is sleeved on the fuel pipe. The top end of the mixing tube passes through the top partition plate, and a mixed gas channel is formed between the inner surface of the mixing tube and the outer surface of the fuel pipe.

[0013] As a further improvement of the present invention, each group of tangential swirl channels of the tangential swirl structure of the tangential swirl component is arranged in multiple numbers, and the swirl degrees of the multiple tangential swirl channels are the same, and the swirl degrees of the tangential swirl channels of the multiple groups of air tangential swirl structures increase or decrease successively from bottom to top along the axial direction of the primary mixing chamber.

[0014] As a further improvement of the present invention, a plurality of nozzle assemblies in an annular multi-layer array structure are staggered to have different swirl degrees according to different numbers of layers.

[0015] As a further improvement of the present invention, the multiple nozzle assemblies are in an annular multi-layer array structure, and the multiple nozzle assemblies in the same layer are staggered to have different swirl degrees.

[0016] As a further improvement of the present invention, the inner surface of the primary mixing chamber is a regular polygonal structure.

[0017] As a further improvement of the present invention, the swirl angle range of the tangential swirl channels of the multiple groups of air tangential swirl structures is 0° to 65°.

[0018] As a further improvement of the present invention, the diameter of the radial fuel outlet is smaller than the diameter of the air swirl outlet.

[0019] As a further improvement of the present invention, a rotating positioning structure is provided between the air guide component and the tangential swirl component.

[0020] As a further improvement of the present invention, multiple radial fuel outlets are arranged, and the multiple radial fuel outlets are evenly distributed along the circumferential direction of the fuel channel to form a radial fuel outlet assembly, and the radial fuel outlet assemblies are evenly distributed along the axial direction of the fuel channel to form multiple groups.

[0021] As a further improvement of the present invention, the top end of the mixing tube is arranged flush with the top end of the fuel pipe.

[0022] Compared with the prior art, the micro-mixing burner with adjustable air swirl has the following beneficial effects:

[0023] 1. In terms of improving fuel adaptability, the combined adjustment mechanism of the air guide component and the tangential swirl component can achieve different swirl degrees for a single nozzle, thereby adapting to fuels of different properties. For hydrogen fuels with extremely fast combustion speed, zero swirl or extremely small swirl can be used to suppress the occurrence of flashback; for ammonia fuels with slower combustion speeds or ammonia-blended fuels, a larger swirl can be used to shorten the flame length and enhance combustion stability.

[0024] 2. In terms of improving combustion stability, multiple nozzle assemblies are symmetrically arranged in a circular multi-layer array structure relative to the center of the air cavity. Different air swirl degrees can be staggered to set nozzle assemblies in different layers, or different air swirl degrees can be staggered to set multiple nozzle assemblies in the same layer according to different working conditions. The different characteristics of flame heights of different nozzle assemblies can be utilized. By finely adjusting the flame height, the low flame can provide high-temperature flue gas for the high flame, thereby realizing the staged coupled combustion of multiple nozzle assemblies in a large space, thereby achieving the purpose of enhancing combustion stability and improving temperature uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0026] Figure 2 is a schematic diagram of the three-dimensional structure of the nozzle assembly of the present invention;

[0027] Figure 3 It is a schematic structural diagram of the nozzle assembly of the present invention;

[0028] Figure 4 It is a schematic diagram of the cross-sectional structure of the air guide component and the tangential swirl component (the swirl degree is 60°, and the tangential swirl channel is in a conducting state) of the present invention;

[0029] Figure 5 It is a schematic diagram of the cross-sectional structure of the air guide component and the tangential swirl component (the swirl degree is 60°, and the tangential swirl channel is blocked) of the present invention;

[0030] Figure 6 It is a schematic diagram of the cross-sectional structure of the air guide component and the tangential swirl component (swirl degree is 30°) of the present invention;

[0031] Figure 7 It is a schematic diagram of the cross-sectional structure of the air guide component and the tangential swirl component (swirl degree is 0°) of the present invention;

[0032] Figure 8 It is a schematic diagram of the cross-sectional structure of the air guide component and the tangential swirl component (counter-swirl, swirl degree is 45°) of the present invention;

[0033] Fig. 9 It is an overall top view of the present invention.

[0034] In the figure: 1-fuel cavity, 11-fuel inlet channel, 2-air cavity, 21-air inlet channel, 3-nozzle assembly, 31-air guide component, 311-air guide inlet, 312-air straight channel, 313-air guide outlet, 314-air guide component positioning pin hole, 32-tangential swirl component, 321-air swirl inlet, 322-tangential swirl channel, 323-air swirl outlet, 324-through positioning pin hole, 325-blocking positioning pin hole, 326-upper thread, 327-lower thread, 33-fuel pipe, 331-fuel pipe inlet, 332-fuel channel, 333-radial fuel outlet, 34-mixing tube, 341-mixed gas inlet, 342-mixed gas channel, 343-mixed gas outlet, 4-top partition. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings.

[0036] like Figure 1 As shown, the micro-mixing burner with adjustable air swirl is coaxially and hermetically spaced from bottom to top in sequence, with a fuel chamber 1, an air chamber 2 and a combustion chamber (not shown in the figure), the fuel chamber 1 and the air chamber 2 are separated by a fuel chamber top plate, the air chamber 2 and the combustion chamber are separated by a top partition plate 4, a middle partition plate is further provided in the air chamber 2, and a plurality of nozzle assemblies 3 are fixedly arranged in the air chamber 2, and as shown in FIG. Fig. 9 As shown, the plurality of nozzle assemblies 3 are symmetrical with respect to the center of the air cavity 2 and form a ring-shaped multi-layer array structure.

[0037] A plurality of fuel intake passages 11 are evenly distributed on the fuel chamber 1 along its circumferential direction, and the fuel can enter the fuel chamber 1 through the fuel intake passages 11 .

[0038] The air cavity 2 is provided with a plurality of air inlet passages 21 evenly distributed along its circumferential direction, and air can enter the air cavity 2 through the air inlet passages 21 .

[0039] like Figure 2 , Figure 3 As shown, the nozzle assembly 3 includes a coaxially arranged air guide component 31, a tangential swirl component 32, a fuel pipe 33 and a mixing pipe 34;

[0040] The tangential swirl component 32 is a blind hole sleeve structure with a blind hole coaxially arranged inside, and the opening position of the blind hole is located at the top of the tangential swirl component 32. The bottom end of the tangential swirl component 32 is tightly and fixedly connected to the top plate of the fuel chamber through a lower thread 327, and the top end of the tangential swirl component 32 is tightly and fixedly connected to the middle partition of the air chamber 2 through an upper thread 326. The blind hole of the tangential swirl component 32 forms a primary mixing chamber, and a plurality of groups of air tangential swirl structures are evenly distributed on the outer wall of the primary mixing chamber along its axial direction, such as Figures 4 to 8As shown, each group of air tangential swirl structures includes a tangential swirl channel 322 with a swirl angle. The swirl angle of the tangential swirl channel 322 refers to the tangential angle between the central axis of the tangential swirl channel 322 and the inner surface of the primary mixing chamber. The swirl direction of the tangential swirl channel 322 can be positive rotation (clockwise rotation) or reverse rotation (counterclockwise rotation). The tangential swirl channel 322 runs through the outer wall of the primary mixing chamber. The outer end of the tangential swirl channel 322 is an air swirl inlet 321, and the inner end is an air swirl outlet 323. The swirl angles of the tangential swirl channels 322 of the multiple groups of air tangential swirl structures are different, and the swirl angle ranges from 0° to 65°. In this embodiment, as shown in FIG. Figure 4 The swirl degree of the tangential swirl channel 322 of the set of air tangential swirl structures shown is 60°. Figure 6 The swirl degree of the tangential swirl channel 322 of the set of air tangential swirl structures shown is 30°. Figure 7 The swirl degree of the tangential swirl channel 322 of the air tangential swirl structure is 0°. Figure 8 The swirl degree of the tangential swirl channel 322 of the set of air tangential swirl structures shown is 45°;

[0041] The air guide component 31 of the overall ring structure is axially positioned and rotatably mounted on the tangential swirl component 32, and multiple air guide components 31 correspond to and face multiple groups of air tangential swirl structures. The position of each tangential swirl channel 322 on the air guide component 31 is provided with an air direct flow channel 312 that penetrates the air guide component 31. The outer end of the air direct flow channel 312 is an air guide air inlet 311, and the inner end is an air guide air outlet 313. By rotating the air guide component 31, the tangential swirl channel 322 can be connected to the air direct flow channel 312, or the air guide component 31 can be rotated to block the tangential swirl channel 322.

[0042] The fuel pipe 33 is a blind hole sleeve structure with a blind hole coaxially arranged inside, and the opening position of the blind hole is located at the bottom end of the fuel pipe 33. The opening position of the blind hole of the fuel pipe 33 is the fuel pipe air inlet 331. The blind hole of the fuel pipe 33 forms a fuel channel 332. The bottom end of the fuel pipe 33 passes through the bottom end of the tangential swirl component 32 and is sealed and fixedly installed with the tangential swirl component 32 through a threaded connection. The top end of the fuel pipe 33 extends out and extends to the outside of the top end of the tangential swirl component 32. A radial fuel outlet 333 is arranged on the fuel channel 332 at a position corresponding to the primary mixing chamber of the tangential swirl component 32.

[0043] The bottom end of the mixing tube 34 of the straight tube structure is sealed and fixedly connected to the top end of the primary mixing chamber of the tangential swirl component 32 through a threaded connection and is in a state of being sleeved on the fuel pipe 33. The top end of the mixing tube 34 is flush with the top end of the fuel pipe 33 and the top end of the mixing tube 34 passes through the top partition 4. A mixture gas channel 342 is formed between the inner surface of the mixing tube 34 and the outer surface of the fuel pipe 33. The bottom end of the mixture gas channel 342 is a mixture gas inlet 341 and the top end is a mixture gas outlet 343.

[0044] The working principle of the micro-mixing burner with adjustable air swirl is as follows: fuel is supplied into the fuel chamber 1 through the fuel inlet channel 11, the fuel enters the fuel channel 332 through the fuel pipe inlet 331 of the fuel pipe 33, and enters the primary mixing chamber of the tangential swirl component 32 through the radial fuel outlet 333; air is supplied into the air chamber 2 through the air inlet channel 21, and the air passes through the air guide inlet 311 of the air guide component 31, the air straight channel 312, the air guide outlet 313 and the air swirl inlet of the tangential swirl component 32 in sequence. The air inlet 321, the tangential swirl channel 322, and the air swirl outlet 323 enter the primary mixing chamber of the tangential swirl component 32; under the action of the tangential swirl channel 322, the air with a certain swirl degree entering the primary mixing chamber is preliminarily mixed with the fuel entering the primary mixing chamber at the same time, and the preliminarily mixed mixed gas enters the mixed gas channel 342 of the mixing tube 34 through the mixed gas inlet 341 for re-mixing to achieve better mixing uniformity, and the secondary mixed mixed gas enters the combustion chamber through the mixed gas outlet 343 for combustion. The joint adjustment mechanism of multiple air guide components 31 and multiple groups of air tangential swirl structures of the tangential swirl component 32 can achieve different swirl degrees of a single nozzle assembly 3, that is, different swirl degrees can be obtained to adapt to fuels of different properties by connecting the tangential swirl channel 322 and the air direct flow channel 312 of a certain group of air tangential swirl structures and blocking the tangential swirl channel 322 and the air direct flow channel 312 of other groups of air tangential swirl structures. In addition, the plurality of nozzle assemblies 3 are symmetrically arranged in an annular multi-layer array structure relative to the center of the air cavity 2. The nozzle assembly 3 arranged in the center of the air cavity 2 is the first layer of nozzles, and the plurality of nozzle assemblies 3 uniformly arranged around the first layer of nozzles at a set interval are the second layer of nozzles, and so on, to form a multi-layer nozzle. The air guide component 31 and the tangential swirl component 32 can be jointly adjusted according to different working conditions to obtain the required air swirl degree, and different air swirl degrees can be staggered for nozzles of different layers (that is, different swirl degrees are set according to different numbers of layers: the swirl degrees of the tangential swirl channels 322 of the nozzle assemblies 3 located on the same layer are the same, and the swirl degrees of the tangential swirl channels 322 of the nozzle assemblies 3 located on different layers are different). Different air swirl degrees are set), or different air swirl degrees are staggered for the same layer of nozzles (that is, the swirl degrees of the tangential swirl channels 322 of the multiple nozzle assemblies 3 on the same layer are different and staggered), so as to achieve the staged coupled combustion of multiple nozzles in a large space, to achieve the purpose of enhancing combustion stability and improving temperature uniformity. Taking the staggered setting of different air swirl degrees for nozzles in different layers as an example, it can be achieved that the first layer nozzles and the third layer nozzles produce relatively long flames, while the second layer nozzles produce relatively short flames. The low flame can provide high-temperature flue gas for the high flame, thereby achieving the staged coupled combustion of multiple nozzles in a large space, to achieve the purpose of enhancing combustion stability and improving temperature uniformity.

[0045] In order to achieve a wider range of air swirl adjustment effects, as a further improvement of the present invention, Figures 4 to 8 As shown, the tangential swirl channels 322 of each group of air tangential swirl structures of the tangential swirl component 32 are arranged in plurality, and the swirl degrees of the plurality of tangential swirl channels 322 are the same, that is, the plurality of tangential swirl channels 322 of each group of air tangential swirl structures are arranged symmetrically relative to the center of the primary mixing chamber, and the swirl degrees of the tangential swirl channels 322 of the plurality of groups of air tangential swirl structures increase or decrease successively from bottom to top along the axial direction of the primary mixing chamber.

[0046] In order to achieve a better mixing effect, as a further improvement scheme of the present invention, the aperture of the radial fuel outlet 333 is smaller than the aperture of the air swirl outlet 323. When the air enters the primary mixing chamber of the tangential swirl component 32 in different directions along each tangential swirl channel 322, the gaseous fuel ejected through the radial fuel outlet 333 can impact the swirl air at a larger jet speed, thereby improving the mixing effect of the fuel and air.

[0047] In order to facilitate the full mixing of fuel and air, as a further improvement of the present invention, the inner surface of the primary mixing chamber is a regular polygonal structure, such as Figure 4 Shown to Figure 8 As shown, in this embodiment, the inner surface of the primary mixing chamber is a regular hexagonal structure. When the air enters the primary mixing chamber of the tangential swirl component 32 along each tangential swirl channel 322 in different directions, the inner surface of the primary mixing chamber with a regular polygonal structure can generate turbulence to the airflow, thereby facilitating the full mixing of fuel and air.

[0048] In order to accurately position and control the rotation state of the rotating air guide component 31, as a further improvement of the present invention, a rotation positioning structure is provided between the air guide component 31 and the tangential swirl component 32. The rotation positioning structure can be as follows: Figure 4 , Figure 5 The locating pin hole and the axial hole positioning structure of the locating pin arranged in the locating pin hole shown in the figure may also be a locating ball socket and a locating ball and a spring locating structure arranged in the locating ball socket, and other rotating positioning structures, such as Figure 4 , Figure 5As shown, when the axial hole positioning structure is adopted, the positioning pin holes arranged in the radial direction may include an air guide component positioning pin hole 314 arranged on the air guide component 31 and a through positioning pin hole 324 and a blocking positioning pin hole 325 arranged on the tangential swirl component 32. When the positioning pin is inserted into the air guide component positioning pin hole 314 and the through positioning pin hole 324 for positioning, the tangential swirl channel 322 is in a conductive state with the air direct current channel 312. When the positioning pin is inserted into the air guide component positioning pin hole 314 and the blocking positioning pin hole 325 for positioning, the rotating air guide component 31 is in a state of blocking the tangential swirl channel 322.

[0049] In order to allow the fuel to evenly enter the tangential swirl component 32, as a further improvement of the present invention, a plurality of radial fuel outlets 333 are provided, and the plurality of radial fuel outlets 333 are evenly distributed along the circumferential direction of the fuel channel 332 to form a radial fuel outlet assembly, and the radial fuel outlet assemblies are evenly distributed along the axial direction of the fuel channel 332 to form a plurality of groups.

[0050] The micro-mixing burner with adjustable air swirl can achieve clean, stable and efficient combustion of a variety of fuels through the combined adjustment mechanism of the air guide component and the tangential swirl component, and can solve the problems of poor fuel adaptability, narrow stable combustion range and high NOx emissions of the combustion chamber of traditional gas turbines in the prior art.

Claims

1. A micro-mixing burner with adjustable air swirl, comprising a fuel chamber (1), an air chamber (2) and a combustion chamber coaxially and hermetically spaced from bottom to top, the fuel chamber (1) and the air chamber (2) being spaced apart by a fuel chamber top plate, the air chamber (2) and the combustion chamber being spaced apart by a top partition plate (4), a middle partition plate being further provided in the air chamber (2), a plurality of nozzle assemblies (3) being fixedly arranged in the air chamber (2), and the plurality of nozzle assemblies (3) being symmetrical with respect to the center of the air chamber (2) to form a ring-shaped multi-layer array structure; a fuel intake passage (11) being provided on the fuel chamber (1); and an air intake passage (21) being provided on the air chamber (2); characterized in that: The nozzle assembly (3) comprises an air guide component (31), a tangential swirl component (32), a fuel pipe (33) and a mixing pipe (34) which are coaxially arranged; The tangential swirl component (32) is a blind hole sleeve structure with a blind hole coaxially arranged inside, and the opening position of the blind hole is located at the top end of the tangential swirl component (32), the bottom end of the tangential swirl component (32) is sealed and fixedly connected to the top plate of the fuel chamber, and the top end of the tangential swirl component (32) is sealed and fixedly connected to the middle partition of the air chamber (2), the blind hole of the tangential swirl component (32) forms a primary mixing chamber, and multiple groups of air tangential swirl structures are evenly arranged on the outer wall of the primary mixing chamber along its axial direction, each group of air tangential swirl structures includes a tangential swirl channel (322) with a swirl angle, the tangential swirl channel (322) runs through the outer wall of the primary mixing chamber, the outer end of the tangential swirl channel (322) is an air swirl inlet (321), and the inner end is an air swirl outlet (323), and the swirl angles of the tangential swirl channels (322) of the multiple groups of air tangential swirl structures are different; An air guide component (31) having an overall annular structure is axially positioned and rotatably mounted on a tangential swirl component (32), and a plurality of air guide components (31) are arranged corresponding to and facing a plurality of groups of air tangential swirl structures. A straight air channel (312) penetrating the air guide component (31) is arranged at a position on the air guide component (31) corresponding to the tangential swirl channel (322); The fuel pipe (33) is a blind hole sleeve structure with a blind hole coaxially arranged inside, and the opening position of the blind hole is located at the bottom end of the fuel pipe (33), the blind hole of the fuel pipe (33) forms a fuel channel (332), the bottom end of the fuel pipe (33) penetrates the bottom end of the tangential swirl component (32), and is sealed and fixedly installed with the tangential swirl component (32), the top end of the fuel pipe (33) protrudes and extends to the outside of the top end of the tangential swirl component (32), and a radial fuel outlet (333) is provided on the fuel channel (332) at a position corresponding to the primary mixing chamber of the tangential swirl component (32); The bottom end of the mixing tube (34) of the straight tube structure is sealed and fixedly connected to the top end of the primary mixing chamber of the tangential swirl component (32) and is sleeved on the fuel pipe (33). The top end of the mixing tube (34) passes through the top partition (4), and a mixed gas channel (342) is formed between the inner surface of the mixing tube (34) and the outer surface of the fuel pipe (33).

2. The micro-mixing burner with adjustable air swirl according to claim 1, characterized in that: The tangential swirl channels (322) of each group of air tangential swirl structures of the tangential swirl component (32) are arranged in a plurality, and the swirl degrees of the plurality of tangential swirl channels (322) are the same, and the swirl degrees of the tangential swirl channels (322) of the plurality of groups of air tangential swirl structures increase or decrease in sequence from bottom to top along the axial direction of the primary mixing chamber.

3. The micro-mixing burner with adjustable air swirl according to claim 1, characterized in that: A plurality of nozzle assemblies (3) in an annular multi-layer array structure are staggered to have different swirl degrees according to different numbers of layers.

4. The micro-mixing burner with adjustable air swirl according to claim 1, characterized in that: A plurality of nozzle assemblies (3) are in an annular multi-layer array structure, and a plurality of nozzle assemblies (3) in a same layer are staggeredly arranged with different swirl degrees.

5. The micro-mixing burner with adjustable air swirl according to claim 1, characterized in that: The inner surface of the primary mixing chamber is a regular polygonal structure.

6. The micro-mixing burner with adjustable air swirl according to any one of claims 1 to 5, characterized in that: The swirl angle range of the tangential swirl channels (322) of the multiple groups of air tangential swirl structures is 0° to 65°.

7. The micro-mixing burner with adjustable air swirl according to any one of claims 1 to 5, characterized in that: The aperture of the radial fuel outlet (333) is smaller than the aperture of the air swirl outlet (323).

8. The micro-mixing burner with adjustable air swirl according to any one of claims 1 to 5, characterized in that: A rotating positioning structure is also provided between the air guide component (31) and the tangential swirl component (32).

9. The micro-mixing burner with adjustable air swirl according to any one of claims 1 to 5, characterized in that: A plurality of radial fuel outlet ports (333) are provided, and the plurality of radial fuel outlet ports (333) are evenly distributed along the circumferential direction of the fuel channel (332) to form a radial fuel outlet assembly, and the radial fuel outlet assembly is evenly distributed along the axial direction of the fuel channel (332) to form a plurality of groups.

10. The micro-mixing burner with adjustable air swirl according to any one of claims 1 to 5, characterized in that: The top end of the mixing tube (34) is arranged flush with the top end of the fuel tube (33).

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