A low pressure loss, wide turndown ratio, multi-swirl discrete array flame burner

Abstract

The application provides a low-pressure-loss wide-adjustment-ratio multi-swirl discrete array flame burner, which comprises a flame tube, a combustion chamber is formed in the flame tube, a first swirler and a second swirler with different sizes are arranged in the flame tube, the second swirler is arranged on both sides of the first swirler, a nozzle in communication with the combustion chamber is arranged on the first swirler and the second swirler; an air supply device, which comprises an air cavity, a fan and a plurality of air supply pipes, the air cavity is connected with the flame tube, the air cavity is in communication with the combustion chamber; the fan is connected with the air cavity and is used for guiding air into the combustion chamber through the air cavity; the first ends of the plurality of air supply pipes are all arranged through the air cavity and are in communication with the nozzles on the first swirler and the second swirler respectively, and the second ends of the plurality of air supply pipes are all in communication with a fuel supply system. The wide-adjustment-ratio of the natural gas combustion power is realized, the flame organization and stability under the condition of extremely low air pressure loss are realized, and the combustion emission is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of burner technology, and more particularly to a low-pressure-loss, wide-tunability multi-swirl discrete array flame burner. Background Technology

[0002] In existing technologies, the design and application of natural gas burners face challenges related to high emissions and narrow control ratios. Traditional natural gas burners typically cannot achieve a wide range of control ratios, meaning that while maintaining combustion stability, precise adjustment over a large fuel supply range is difficult. This limits the burner's adaptability and flexibility under different operating conditions. Furthermore, existing natural gas burners often generate high emissions during combustion, causing adverse environmental impacts.

[0003] To address these issues, the industry has been seeking natural gas burner designs with lower emissions and wider controllability. However, existing burner designs often struggle to achieve both low emissions and a wide controllability while maintaining combustion stability, or they may result in significant pressure losses when achieving a wide controllability, impacting combustion efficiency and fuel economy. Summary of the Invention

[0004] This invention provides a multi-swirling discrete array flame burner with low pressure loss and wide control ratio, which solves the defects of high emissions and narrow control ratio in existing natural gas burners, and achieves stable combustion and low emission combustion of natural gas fuel under wide control ratio and extremely low pressure loss conditions.

[0005] This invention provides a low-pressure-loss, wide-tunability multi-swirl discrete array flame burner, comprising:

[0006] A flame tube is formed with a combustion chamber. The flame tube is provided with a first swirler and a second swirler of different sizes. The second swirler is arranged on both sides of the first swirler. Both the first swirler and the second swirler are provided with nozzles that communicate with the combustion chamber.

[0007] The ventilation device includes an air chamber, a fan, and multiple air supply pipes. The air chamber is connected to the flame tube and communicates with the combustion chamber. The fan is connected to the air chamber and is used to introduce air into the combustion chamber through the air chamber. The first ends of the multiple air supply pipes all pass through the air chamber and communicate with the nozzles on the first swirler and the second swirler, respectively. The second ends of the multiple air supply pipes are all connected to the fuel supply system, so that different air supply pipes can be controlled independently to achieve a wide adjustment ratio.

[0008] According to the present invention, a multi-swirling discrete array flame burner with low pressure loss and wide adjustment ratio is provided, wherein the first swirling element is disposed at the center of the flame tube, and multiple second swirling elements are provided, with the multiple second swirling elements distributed on both sides of the first swirling element.

[0009] According to the present invention, a multi-swirling discrete array flame burner with low pressure loss and wide adjustment ratio is provided, wherein the first swirler and the second swirler each include: a housing, a rotating shaft and a plurality of blades; a rotating cavity is formed inside the housing, the rotating shaft is disposed inside the rotating cavity, and the plurality of blades are circumferentially connected to the rotating shaft.

[0010] According to the present invention, a multi-swirling discrete array flame burner with low pressure loss and wide control ratio is provided, wherein the angle of each blade is 30 degrees to 60 degrees.

[0011] According to the present invention, a multi-swirling discrete array flame burner with low pressure loss and wide adjustment ratio is provided, wherein the blades of the first swirling coil and the blades of the second swirling coil rotate in the same direction.

[0012] Alternatively, the blades of the first hydrocyclone rotate in opposite directions to the blades of the second hydrocyclone.

[0013] According to the present invention, a multi-swirling discrete array flame burner with low pressure loss and wide adjustment ratio is provided, wherein the flame tube adopts a double-layer partition, the combustion chamber is formed in the double-layer partition, and the double-layer partition is provided with a square hole, through which the combustion chamber communicates with the air cavity.

[0014] According to the present invention, a multi-swirling discrete array flame burner with low pressure loss and wide adjustment ratio is provided, wherein a portion of the second swirling elements is disposed on one side of the first swirling element, and another portion of the second swirling elements is disposed on the other side of the first swirling element;

[0015] One portion of the nozzles in the second cyclone is connected to the fuel supply system via one of the air supply pipes, another portion of the nozzles in the second cyclone is connected to the fuel supply system via another air supply pipe, and the nozzles in the first cyclone are connected to the fuel supply system via yet another air supply pipe.

[0016] According to the present invention, a multi-swirling discrete array flame burner with low pressure loss and wide adjustment ratio is provided, wherein each nozzle is provided with a chamfer along its circumference, and the chamfer is provided with a plurality of injection holes arranged in an array along its circumference, and each injection hole is connected to a corresponding gas supply pipe.

[0017] According to the present invention, a low-pressure-loss, wide-adjustment multi-swirl discrete array flame burner is provided, wherein the chamfer angle ranges from 30 to 60°.

[0018] According to the present invention, a multi-swirling discrete array flame burner with low pressure loss and wide adjustment ratio is provided, wherein the injection holes are provided with 6 to 10, the diameter of the injection holes is 1 to 2 mm, and the axis of the injection holes is located 1-2 mm below the swirler.

[0019] The present invention provides a low-pressure-loss, wide-adjustment-ratio multi-swirl discrete array flame burner, comprising a flame tube and an air supply device. The flame tube forms a combustion chamber, and the flame tube contains a first swirler and a second swirler of different sizes. The second swirler is disposed on both sides of the first swirler. Both the first and second swirlers are provided with nozzles communicating with the combustion chamber. The air supply device includes an air chamber, a fan, and multiple air supply pipes. The air chamber is connected to the flame tube and communicates with the combustion chamber. The fan is connected to the air chamber and is used to introduce air into the combustion chamber through the air chamber. The first ends of the multiple air supply pipes pass through the air chamber and communicate with the nozzles on the first and second swirlers, respectively. The second ends of the multiple air supply pipes are all connected to a fuel supply system. By combining the first and second cyclones and controlling the gas supply pipes individually, a wide adjustment ratio for natural gas combustion power is achieved. At the same time, air is supplied through the blower, and the air passes through the first and second cyclones of different sizes. The pressure drop generates a reasonable recirculation zone, and natural gas is supplied through the gas supply pipes. The natural gas mixes with the swirling air and then burns, forming a discrete columnar swirling flame. This achieves flame organization and stability under extremely low air pressure loss conditions, effectively reducing combustion emissions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a front view of the low-pressure-loss, wide-adjustment-ratio multi-swirl discrete array flame burner provided in an embodiment of the present invention.

[0022] Figure 2 for Figure 1 A sectional view along direction AA.

[0023] Figure 3 yes Figure 2 A schematic diagram along the rotational section line.

[0024] Figure 4 for Figure 1 A sectional view along the BB direction.

[0025] Figure 5 This is a schematic diagram of the structure of the cyclone separator and nozzle combination provided in an embodiment of the present invention.

[0026] Figure 6 This is a top view of the cyclone separator and nozzle combination provided in an embodiment of the present invention.

[0027] Figure 7 This is a cross-sectional view of the hydrocyclone and nozzle combination provided in an embodiment of the present invention.

[0028] Figure label:

[0029] 1. Flame tube; 2. Double-layer partition; 3. First swirler; 4. Second swirler; 5. Nozzle; 6. Injection hole; 7. Air chamber; 8. Air supply pipe; 9. Fan; 10. Square hole. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0031] The following is combined Figures 1-7 The present invention describes a low-pressure-loss, wide-adjustment-ratio multi-swirl discrete array flame burner, with a pressure loss typically below 100 Pa.

[0032] This embodiment provides a low-pressure-loss, wide-tunability multi-swirl discrete array flame burner, such as... Figures 1 to 4 As shown, the device includes a flame tube 1 and a ventilation device. The flame tube 1 forms a combustion chamber, and a first swirler 3 and a second swirler 4 of different sizes are provided in the flame tube 1. The second swirler 4 is located on both sides of the first swirler 3. Both the first swirler 3 and the second swirler 4 are provided with nozzles 5 that communicate with the combustion chamber. The ventilation device includes an air chamber 7, a blower 9, and multiple air supply pipes 8. The air chamber 7 is connected to the flame tube 1 and communicates with the combustion chamber. The blower 9 is connected to the air chamber 7 and is used to introduce air into the combustion chamber through the air chamber 7. The first ends of the multiple air supply pipes 8 all pass through the air chamber 7 and communicate with the nozzles 5 on the first swirler 3 and the second swirler 4, respectively. The second ends of the multiple air supply pipes 8 are all connected to the fuel supply system, so that different air supply pipes 8 can be controlled individually to achieve a wide adjustment ratio.

[0033] Specifically, the flame tube 1, as the main structure of the combustion chamber, incorporates two different sizes of first swirlers 3 and second swirlers 4. The second swirlers 4 are positioned on either side of the first swirlers 3, a layout that helps create a more complex combustion flow field. Each swirler is equipped with nozzles 5 directly connected to the combustion chamber; these nozzles 5 serve as channels for the fuel-air mixture to enter the combustion chamber. An air supply device is responsible for providing the necessary air to the combustion chamber and controlling the fuel supply. This device includes an air chamber 7, a blower 9, and multiple air supply pipes 8. The air chamber 7 is connected to the flame tube 1, ensuring smooth air entry into the combustion chamber. The blower 9 introduces air into the combustion chamber through the air chamber 7, providing the necessary oxygen for the combustion process. The first ends of the multiple air supply pipes 8 pass through the air chamber 7 and are connected to the nozzles 5 on the first swirlers 3 and second swirlers 4, respectively, while the second ends are connected to the fuel supply system. This design allows each swirler to receive fuel independently, thus achieving staged control of the burner.

[0034] In this embodiment, by providing different gas supply pipes 8 for the first swirler 3 and the second swirler 4, precise control of the burner is achieved. This staged control method can adjust the combustion power according to actual needs, reducing the minimum combustion power while ensuring the maximum combustion power, thereby significantly improving the control ratio.

[0035] By adjusting the multiple combinations of cyclone separators, this embodiment can generate effective swirl with extremely low pressure loss, thereby forming an effective recirculation zone. This not only ensures stable flame conditions for natural gas diffusion combustion but also optimizes the mixing effect of natural gas and air, improving combustion efficiency.

[0036] Compared to a traditional single flame, this embodiment produces a discrete, circumferentially arrayed flame. This flame configuration results in a more uniform heat distribution, avoids overlap of high-temperature zones, and thus reduces NOx (nitrogen oxides) formation. This not only helps reduce environmental pollution during combustion but also improves the burner's environmental performance.

[0037] In some embodiments, such as Figure 2-3 As shown, there is one first swirler 3 and multiple second swirlers 4. The first swirler 3 is located at the center of the flame tube 1, and the multiple second swirlers 4 are distributed on both sides of the first swirler 3.

[0038] In this embodiment, a plurality of second swirlers 4 are arranged in a uniform circumferential array around the first swirler 3 at the center. This arrangement not only ensures a reasonable distribution of the recirculation zone in the combustion chamber, but also greatly promotes the thorough mixing of natural gas and air. Each second swirler 4 is connected to the air chamber 7, thereby ensuring that air can be uniformly supplied to each combustion point.

[0039] This configuration significantly improves the burner's operational stability. Due to the optimized distribution of the recirculation zone and the thorough mixing of natural gas and air, the combustion process becomes more stable and uniform. This not only helps reduce temperature fluctuations within the combustion chamber and minimizes the accumulation of high-temperature zones, effectively suppressing NOx formation, but also enhances the overall performance of the burner.

[0040] Furthermore, this uniform flame distribution results in lower pollutant emissions, further reducing negative environmental impacts. Therefore, this low-pressure-loss, wide-tunability multi-swirl discrete array flame burner not only improves combustion efficiency but also achieves a more environmentally friendly combustion process.

[0041] like Figure 5 , Figure 6 and Figure 7 As shown, both the first hydrocyclone 3 and the second hydrocyclone 4 include: a housing, a rotating shaft, and multiple blades. A rotating cavity is formed inside the housing, the rotating shaft is disposed inside the rotating cavity, and the multiple blades are connected to the rotating shaft at intervals along the circumference of the rotating shaft.

[0042] The shell serves as the main supporting structure of the hydrocyclone, and a rotating cavity is formed inside it. This rotating cavity provides the necessary space for the shaft and blades, allowing them to rotate freely within it, thereby producing a swirling effect.

[0043] The rotating shaft is located inside the rotating cavity and serves as a support structure for the blades. Multiple blades are connected to the rotating shaft at circumferential intervals. The angles and number of these blades have been carefully designed to ensure optimal swirling effect.

[0044] Preferably, the angle of each blade is set between 30 and 60 degrees. This angle range has been verified through extensive experiments to ensure that the blades generate sufficient centrifugal force during rotation, thereby forming an effective vortex. At the same time, this angle also ensures the strength and durability of the blades, allowing the hydrocyclone to maintain stable performance during long-term use.

[0045] By adjusting the blade angle and number, both the first swirler 3 and the second swirler 4 can produce a strong swirling effect. The swirling helps to better mix fuel and air, thereby improving combustion efficiency.

[0046] In some embodiments, such as Figures 3 to 7 As shown, the blades of the first hydrocyclone 3 rotate in the same direction as the blades of the second hydrocyclone 4. Alternatively, the blades of the first hydrocyclone 3 rotate in opposite directions to the blades of the second hydrocyclone 4. Furthermore, the rotation direction of each second hydrocyclone 4 can be adjusted as needed to ensure proper mixing.

[0047] In this embodiment, when the blades of the first swirler 3 and the blades of the second swirler 4 operate in the same direction of rotation, they can jointly form a powerful swirling field. This configuration helps to mix fuel and air more effectively, thereby improving the stability and efficiency of the combustion process. At the same time, the same direction of rotation also reduces turbulence and eddies in the combustion chamber, reducing energy loss and resulting in better overall burner performance.

[0048] On the other hand, when the blades of the first swirler 3 and the blades of the second swirler 4 operate in opposite directions of rotation, a shear effect is generated between them. This shear effect can further promote the mixing of fuel and air, making the combustion process more complete and uniform. In addition, the opposite rotation direction also helps to form a more complex flow field structure in the combustion chamber, thereby enhancing the stability and controllability of combustion.

[0049] In addition to the two fixed rotation direction configurations mentioned above, some embodiments also allow adjustment of the rotation direction of each second swirler 4 according to actual needs. This adjustability enables the burner to adapt to different operating conditions and fuel types, ensuring optimal mixing and combustion efficiency. By precisely controlling the rotation direction of each second swirler 4, the flow field structure within the combustion chamber can be further optimized, reducing energy loss and pollutant emissions.

[0050] In some embodiments, such as Figures 1 to 4 As shown, the flame tube 1 adopts a double-layer partition 2, and a combustion chamber is formed inside the double-layer partition 2. A square hole 10 is provided on the double-layer partition 2, and the combustion chamber communicates with the air cavity 7 through the square hole 10.

[0051] In this embodiment, a closed combustion chamber is formed inside the double-layer partition 2 structure of the flame tube 1. This combustion chamber is the main site where fuel and air mix and undergo combustion. The design of the double-layer partition 2 not only provides necessary heat insulation protection for the combustion chamber, but also makes the combustion process more stable and controllable.

[0052] Multiple square holes 10 are provided on the double-layer partition 2. These square holes 10 not only connect the combustion chamber and the air chamber 7, but also allow for more complete airflow and mixing within the combustion chamber. By adjusting the size, number, and position of the square holes 10, the airflow and velocity entering the combustion chamber can be precisely controlled, thereby optimizing the combustion process.

[0053] Some of the square holes 10 are located near the first swirler 3 and the second swirler 4. The design of these holes helps to introduce the swirling air generated by the swirlers into the combustion chamber, further promoting fuel-air mixing. Other square holes 10 are distributed in a ring array inside the double-layer partition 2, forming an air film cooling structure together with the double-layer partition 2. This structure can form a thin air film during combustion, effectively isolating the high temperature of the combustion chamber from the double-layer partition 2, greatly reducing the temperature of the double-layer partition 2, and ensuring the heat dissipation effect and service life of the flame tube 1.

[0054] In some embodiments, the air film cooling structure consists of an annular array of square holes 10 and a double-layer heat insulation layer. The square holes 10 of the annular array are 1-2 mm long and 10-15 mm wide, and are located in the annular groove of the double-layer partition 2. After air flows into the double-layer partition 2 from the air cavity 7, a cooling air film is formed, which cools the inner high-temperature partition layer, reduces the wall temperature, and thus reduces combustion emissions.

[0055] The supply of swirling gas can be adjusted by increasing or decreasing the number of second swirlers 4 to meet different combustion requirements, thereby improving the flexibility and adaptability of the burner.

[0056] In some embodiments, such as Figures 1 to 4 As shown, a portion of the second cyclone separator 4 is located on one side of the first cyclone separator 3, and another portion of the second cyclone separator 4 is located on the other side of the first cyclone separator 3; the nozzles 5 in a portion of the second cyclone separator 4 are connected to the fuel supply system through one air supply pipe 8, and the nozzles 5 in the other portion of the second cyclone separator 4 are connected to the fuel supply system through another air supply pipe 8. The nozzles 5 in the first cyclone separator 3 are connected to the fuel supply system through yet another air supply pipe 8, so that the different air supply pipes 8 can be controlled independently to achieve a wide adjustment ratio.

[0057] In this embodiment, the low-pressure-loss, wide-adjustment-ratio multi-swirl discrete array flame burner is provided with a first swirler 3 and multiple second swirlers 4.

[0058] These second swirlers 4 are divided into two parts, one part is located on one side of the first swirler 3, and the other part is located on the other side of the first swirler 3. This arrangement may help to ensure uniform distribution and thorough mixing of fuel in the combustion chamber. Each swirler (including the first swirler and the second swirler 4) is equipped with nozzles 5, which are used to inject fuel into the combustion chamber.

[0059] Nozzle 5 is connected to the fuel supply system via air supply pipe 8. Specifically, the second swirler 4 and the first swirler 3, each in different sections, are each connected to the fuel supply system via an independent air supply pipe 8. By providing a separate air supply pipe 8 for each swirler or swirler group, the system achieves precise fuel control. Since each air supply pipe 8 can be controlled individually, the fuel supply to each swirler or swirler group can be adjusted as needed. This flexibility allows the system to operate over a wide range of fuel adjustment ratios, thus adapting to different combustion requirements.

[0060] The wide-adjustment-ratio, low-pressure-loss, multi-swirling discrete array flame burner provided in this embodiment can operate safely under ultra-low pressure drops of no more than 80 Pa and no more than 700 Pa. It can achieve low emissions of natural gas fuel through diffusion flame combustion technology of multi-combined swirling and discrete arrays, and solves the problem of difficult flame stabilization under extremely low pressure drop conditions.

[0061] In some embodiments, such as Figures 1 to 7 As shown, each nozzle 5 has a chamfer along its circumference, and multiple injection holes 6 are arranged in an array along its circumference on the chamfer. Each injection hole 6 is connected to a corresponding air supply pipe 8.

[0062] For example, the first end of the nozzle 5 is provided with 7 spray holes 6, and the circumferential array is vertically arranged at the center of the 45° chamfered surface. The diameter of the spray holes 6 is between 1 and 2 mm. The installation position and spray angle can be set in various ways. For example, the spray angle can be set to 30 to 60°, and the installation position can be the large end, small end and center of the chamfered surface.

[0063] This setup, by adjusting the injection angle and installation position, alters the injection effect of the split natural gas streams, preventing the jet root from being directly impacted by the swirling air and affecting the mixing effect. This ensures a more thorough mixing of the jet and the swirling air, resulting in more complete combustion and higher combustion efficiency.

[0064] Furthermore, the spray angle and installation position settings affect the flame distribution effect of the single flame of the discrete array. The larger the spray angle and the lower the installation position, the lower the flame height and the wider the flame, thereby affecting the temperature distribution of the combustion zone and achieving the purpose of ensuring flame stability and reducing combustion emissions.

[0065] It should be noted that the number of injection holes 6 should not be too large, preferably between 6 and 10. Too many injection holes 6 will cause interference when a single flame is burning, which will lead to overlapping of high-temperature zones, higher combustion emissions, and the presence of multiple jets will result in lower jet velocity and flame instability. Correspondingly, the number of injection holes should not be too small, as too few holes will result in higher injection velocity and longer flame length. Under low-velocity swirling air conditions, the mixing effect of high-velocity jets will be poor, and flameout will be easy. The axial distance between injection holes 6 and the second swirler 4 should not be too large, as too large distances will result in poor mixing effect between the single natural gas jet and the low-pressure-loss swirling air, affecting combustion emissions.

[0066] Reference Figure 5 , Figure 6 The axial distance between the first cyclone 3, the second cyclone 4 and the injection hole 6 is between 1 and 2 mm. The number of cyclone blades should be between 6 and 10. The outer diameter of the cyclone is between 30 mm and 60 mm, and the inner diameter is between 12 mm and 24 mm. If the cyclone is the first cyclone 3, the larger range should be selected. The cyclone swirl angle is between 30 and 60°.

[0067] This configuration provides effective swirling air under extremely low pressure loss conditions, ensuring the effect of the recirculation zone and thus ensuring uniform mixing of the natural gas jet with the low-pressure-loss swirling air. The number of blades and their inner and outer diameters should be within a reasonable range to ensure that the effective area is reasonable and the swirling effect meets the requirements.

[0068] In summary, this application achieves cooling of the combustion zone and reduces combustion emissions through a double-layer insulation layer, square holes 10 inside the insulation layer, and square holes 10 around the cyclone separators. The invention achieves a wide adjustment ratio for natural gas combustion power through a multi-combination arrangement of the first cyclone separator 3 and the second cyclone separator 4, and individual control of the gas supply pipe 8. Air is supplied by the blower 9; however, due to the extremely low pressure drop and flow rate of the blower 9, mixing with natural gas is very difficult. The air effectively utilizes the pressure drop to create a reasonable recirculation zone through the combined cyclone separators of varying sizes, and natural gas is supplied through the gas supply pipe 8. After exiting the natural gas nozzle 5, the circumferential array of discrete injection holes 6 splits into streams. These streams of natural gas mix with the swirling air and then burn, forming a discrete columnar swirling flame. This achieves flame organization and stability under extremely low air pressure drop conditions, effectively reducing combustion emissions.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low-pressure-loss, wide-tunability multi-swirl discrete array flame burner, characterized in that, include: A flame tube (1) is formed with a combustion chamber. The flame tube (1) is provided with a first swirler (3) and a second swirler (4) of different sizes. The first swirler (3) is located at the center of the flame tube (1). There are multiple second swirlers (4). Multiple second swirlers (4) are located on both sides of the first swirler (3). Both the first swirler (3) and the second swirler (4) are provided with nozzles (5) that communicate with the combustion chamber. The ventilation device includes an air chamber (7), a fan (9) and multiple air supply pipes (8). The air chamber (7) is connected to the flame tube (1) and communicates with the combustion chamber. The fan (9) is connected to the air chamber (7) and is used to introduce air into the combustion chamber through the air chamber (7). The first ends of the plurality of air supply pipes (8) pass through the air cavity (7) and are connected to the nozzles (5) on the first cyclone (3) and the second cyclone (4) respectively. The second ends of the plurality of air supply pipes (8) are connected to the fuel supply system. One part of the second cyclone separator (4) is disposed on one side of the first cyclone separator (3), and the other part of the second cyclone separator (4) is disposed on the other side of the first cyclone separator (3); One part of the nozzles (5) in the second cyclone (4) are connected to the fuel supply system through one of the air supply pipes (8), and another part of the nozzles (5) in the second cyclone (4) are connected to the fuel supply system through another air supply pipe (8). The nozzles (5) in the first cyclone (3) are connected to the fuel supply system through yet another air supply pipe (8), so that different air supply pipes (8) can be controlled independently to achieve a wide adjustment ratio.

2. The low-pressure-loss, wide-adjustment-ratio multi-swirl discrete array flame burner according to claim 1, characterized in that, Both the first hydrocyclone (3) and the second hydrocyclone (4) include: a housing, a rotating shaft and multiple blades; a rotating cavity is formed inside the housing, the rotating shaft is disposed inside the rotating cavity, and multiple blades are connected to the rotating shaft at intervals along the circumference of the rotating shaft.

3. The low-pressure-loss, wide-adjustment-ratio multi-swirl discrete array flame burner according to claim 2, characterized in that, The angle of each blade is between 30 and 60 degrees.

4. The low-pressure-loss, wide-adjustment-ratio multi-swirl discrete array flame burner according to claim 2, characterized in that, The blades of the first hydrocyclone (3) rotate in the same direction as the blades of the second hydrocyclone (4); Alternatively, the blades of the first hydrocyclone (3) rotate in the opposite direction to the blades of the second hydrocyclone (4).

5. The low-pressure-loss, wide-adjustment-ratio multi-swirl discrete array flame burner according to claim 1, characterized in that, The flame tube (1) adopts a double-layer partition (2), and the combustion chamber is formed inside the double-layer partition (2). The double-layer partition (2) is provided with a square hole (10), and the combustion chamber communicates with the air cavity (7) through the square hole (10).

6. The low-pressure-loss, wide-adjustment-ratio multi-swirl discrete array flame burner according to claim 1, characterized in that, Each of the nozzles (5) has a chamfer along its circumference, and the chamfer has a plurality of injection holes (6) arranged in an array along its circumference, and each injection hole (6) is connected to the corresponding air supply pipe (8).

7. The low-pressure-loss, wide-tunability multi-swirl discrete array flame burner according to claim 6, characterized in that, The chamfer angle ranges from 30° to 60°.

8. The low-pressure-loss, wide-tunability multi-swirl discrete array flame burner according to claim 6, characterized in that, The injection hole (6) has 6 to 10 holes, the diameter of the injection hole (6) is 1 to 2 mm, and the axis of the injection hole (6) is located 1-2 mm below the hydrocyclone.

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