burner

Abstract

The present invention relates to a burner and a combustion method; wherein the burner includes a first shell, a second shell and a plurality of distribution components, the first ends of the plurality of distribution components are arranged on the outer peripheral surface of the second shell with the axis of the second shell as the axis, the second ends of the plurality of distribution components all pass through the first shell to radially divide the first cavity into a plurality of separate cavities, the plurality of separate cavities are respectively communicated with a plurality of first air outlet groups, and each distribution component is provided with a second air outlet group on two opposite sides, and the connection line between the second air outlet group and the first air outlet group is perpendicular to the axis of the first shell; the burner of the present application, by not providing a premixing chamber, allows air and gas to be mixed and ignited outside the first shell, so that backfire accidents or flameout phenomena are not likely to occur, thereby ensuring safety, and at the same time, the mixing effect of air and gas can be ensured by cross jets, thereby ensuring the combustion effect.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, in particular to a burner. Background Art

[0002] The mainstream low-NOx technologies for gas burners currently include fully premixed combustion, flue gas recirculation (FGR), and flue gas internal recirculation (FIR). Fully premixed combustion, which fully premixes gas and air before they enter the combustion chamber, allows for more complete combustion, improves combustion efficiency, reduces harmful gas emissions, and reduces combustion chamber space requirements. It has therefore become one of the most advanced gas combustion technologies internationally.

[0003] Existing burners using full premixed combustion technology generally include a premixing chamber and a combustion chamber. Gas and air are mixed in the premixing chamber by a fan and then sent into the combustion chamber, which then burns the mixed gas.

[0004] However, the stability of existing burners using full premixed combustion technology depends on the balance between gas flow rate and combustion speed. When this balance is destroyed by changes in gas composition, blockage of air flow channels or changes in gas temperature, resulting in the combustion speed being greater than the air flow speed, backfire accidents or flameout will occur, affecting safety of use. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a burner which can avoid flashback accidents or flameout phenomena while ensuring the mixing effect of gases.

[0006] The above technical problems are solved by the following technical solutions:

[0007] A burner comprising:

[0008] a first housing, wherein the first housing is provided with a first air inlet, a first cavity is provided inside the first housing and communicates with the first air inlet, and a plurality of first air outlet groups are provided on an outer circumference of the first housing and communicate with the first cavity, wherein the first air outlet groups are evenly distributed around an axis of the first housing;

[0009] a second shell, the second shell being disposed in the first cavity, and an air chamber for air to pass through being formed between an outer wall of the second shell and an inner wall of the first cavity, the second shell being provided with a second air inlet, and the interior of the second shell being provided with a second cavity communicating with the second air inlet;

[0010] Several distribution members are provided with a third cavity inside the distribution members, and a second air outlet group is provided on the distribution members, and the second air outlet group is communicated with the second cavity through the third cavity. The distribution members have a first end and a second end relative to each other in the radial direction of the second shell. The first ends of several of the distribution members are arranged on the outer peripheral surface of the second shell with the axis of the second shell as the axis. The second ends of several of the distribution members are all located on the outside of the first shell. The outer peripheral surface of the first shell cooperates with the two adjacent distribution members to form a mixing zone. The second air outlet group and the first air outlet group are both located in the mixing zone.

[0011] The above-mentioned burner allows air to enter the mixing zone through several first air outlet groups and gas to enter the mixing zone through the second air outlet. The air and gas in the mixing zone form cross jets after contact, forming an internal recirculation that is conducive to ignition, so that the air and gas are strongly mixed to form a mixed gas. Similar to the combustion characteristics of a swirl burner, after the mixed gas is ignited, the flame will spread outward from the inner edge of the area where the internal recirculation is located. At the same time, an external recirculation will be formed on the periphery of the airflow, and the external recirculation will also draw in high-temperature flue gas to heat the mixed gas, thereby forming a stable burning flame. Since no premixing chamber is provided, the air and gas are mixed and ignited outside the first shell, so that backfire accidents or flameouts are not likely to occur, thereby ensuring safety. At the same time, the cross jets can ensure the mixing effect of air and gas, thereby ensuring the combustion effect.

[0012] In one embodiment, two opposite side surfaces of the distribution member are each provided with a second air outlet group, and a connecting line of the two second air outlet groups is perpendicular to the radial direction and the axial direction of the second shell.

[0013] In the above embodiment, by increasing the number of the second gas outlet groups, the gas output paths can be increased, thereby making the gas output more uniform.

[0014] In one embodiment, the first shell and the second shell are coaxially arranged, the first air outlet group includes a plurality of first air outlet monomers evenly distributed along the axis of the first shell, and the second air outlet group includes a plurality of second air outlet monomers evenly distributed along the axis of the first shell.

[0015] In the above embodiment, by evenly distributing a plurality of first gas outlet monomers and a plurality of second gas outlet monomers, air and fuel gas can be evenly output through the plurality of first gas outlet monomers and the plurality of second gas outlet monomers, respectively, so that the mixed gas is evenly burned, thereby avoiding the generation of harmful gases due to concentrated combustion and also avoiding damage to the burner caused by the high temperature generated by the concentrated combustion.

[0016] In one embodiment, the burner further includes an air distributor, which is sleeved on the second shell and abuts against the inner circumference of the first cavity. The air distributor is provided with a plurality of air regulating ports 5, and the plurality of air regulating ports are all connected to the air chamber.

[0017] In the above embodiment, the gas in the first shell can be evenly distributed by the gas distributor, so that the gas can be evenly output through the plurality of first gas outlet groups.

[0018] In one embodiment, the gas distributor includes an annular plate and a plurality of cyclone teeth, the plurality of gas regulating ports are arranged on the annular plate along the circumferential direction, the plurality of cyclone teeth are respectively arranged on the edges of the plurality of gas regulating ports, and an angle is formed between the cyclone teeth and the end face of the annular plate.

[0019] In the above embodiment, the flow direction of the gas can be guided by the cyclone teeth, and the flow direction of the gas can be changed accordingly by changing the angle, so as to change the shape and position of the ignited flame as needed in coordination with the second gas outlet group.

[0020] In one embodiment, the angle a between the axis of the second gas outlet unit and the radial direction of the first shell is 0-60°.

[0021] In the above embodiment, the shape and position of the ignited flame can be changed by the cooperation between the second gas outlet unit with an inclined angle and the cyclone teeth with an inclined angle.

[0022] In one embodiment, the second air outlet group includes a plurality of second air outlet units evenly distributed along the axis of the first shell, and the aperture of the second air outlet units is 1-3 mm.

[0023] In the above embodiment, when the area heat intensity and volume heat intensity are close, the aperture of the millimeter-level gas outlet monomer is larger than the aperture of the micron-level metal fiber hole. Therefore, compared with the traditional metal fiber burner, this burner is not prone to burning due to blockage.

[0024] In one embodiment, a distance L between the second outlet unit and the second end of the distribution member satisfies 3D≤L≤30D, and a thickness W of the distribution member satisfies D≤W≤10D, where D is the aperture of the second outlet unit.

[0025] In the above embodiment, the burner can be guaranteed to have good external reflow and internal reflow effects by limiting the size, thereby ensuring the combustion effect.

[0026] In one embodiment, the first shell includes a mounting shell, a mounting flange and an end cover, the mounting flange and the end cover are respectively arranged at the axial ends of the mounting shell, and the first air inlet and the plurality of the first air outlets are all arranged on the mounting shell.

[0027] In the above embodiment, the burner can be assisted in installation by the mounting flange. At the same time, by arranging the first air inlet and the plurality of first air outlets on the mounting shell, the length of the space occupied by the first shell after installation can be ensured to remain unchanged.

[0028] In one embodiment, the second shell includes an inlet section, a transition section and a main body section, the inlet section and the main body section are respectively connected and arranged at the axial ends of the transition section, and the diameter of the inlet section is smaller than the diameter of the main body section. The inlet section is passed through and fixed on the mounting flange, and the plurality of second air outlets are all arranged on the main body section.

[0029] In the above embodiment, the gas can enter the transition section and the main body section through the inlet section, and the stability between the first shell and the second shell can be ensured by passing the inlet section through and fixing it on the mounting flange.

[0030] In one embodiment, the distribution member is a plate-shaped structure, and the second air outlet group is provided on a first side surface and a second side surface of the distribution member that are opposite to each other, and the first side surface and the second side surface are both perpendicular to the second shell.

[0031] In the above embodiment, the plate-like structure is simple and easy to process. At the same time, by making the first side surface and the second side surface perpendicular to the second shell, the distance between two adjacent distribution components is ensured to be consistent, thereby ensuring that the distance between two adjacent second air outlet groups is also consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of a burner according to some embodiments of the present application;

[0033] Figure 2 A partial structural schematic diagram of a burner according to some embodiments of the present application;

[0034] Figure 3 This is a schematic diagram of the structural breakdown of a burner in some embodiments of the present application;

[0035] Figure 4 This is a schematic structural diagram of a burner mounting shell according to some embodiments of the present application;

[0036] Figure 5 This is a schematic structural diagram of a second shell of a burner in some embodiments of the present application;

[0037] Figure 6 This is a schematic structural diagram of a distribution component of a burner in some embodiments of the present application;

[0038] Figure 7 This is an external schematic diagram of a distribution member of a burner according to some embodiments of the present application;

[0039] Figure 8 This is a schematic structural diagram of a gas distributor for a burner in some embodiments of the present application;

[0040] Figure 9 This is a combustion principle diagram of a burner according to some embodiments of the present application.

[0041] Reference numerals:

[0042] 1. First shell;

[0043] 11. Mounting shell; 12. Mounting flange; 13. End cover;

[0044] 14. First air inlet;

[0045] 15. First cavity;

[0046] 151, single cavity;

[0047] 16. First air outlet group;

[0048] 161, first gas outlet monomer;

[0049] 17. First installation port;

[0050] 2. Second shell;

[0051] 21. Entrance section; 22. Transition section; 23. Main section;

[0052] 24. Second air inlet;

[0053] 25. Second cavity;

[0054] 26. Second installation port;

[0055] 3. Distribution parts;

[0056] 31. The third cavity;

[0057] 32. First side;

[0058] 33. Second side;

[0059] 34. First end;

[0060] 35. Second end;

[0061] 36. Tongkou;

[0062] 37. Second air outlet group;

[0063] 371, second outlet monomer;

[0064] 4. Gas distributor;

[0065] 41. Annular plate; 42. Cyclone teeth;

[0066] 43. Air adjustment port;

[0067] 5. Mixed zone;

[0068] 6. Internal reflux;

[0069] 7. External reflux. DETAILED DESCRIPTION

[0070] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0071] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axis", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0072] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0073] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0074] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0075] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0076] Fully premixed combustion technology involves thoroughly mixing gas with sufficient air before entering the burner, eliminating the need for air supply during the combustion process. Existing burners using fully premixed combustion technology typically include a premixing chamber and a combustion chamber. Air and gas are mixed in the premixing chamber and then fed into the combustion chamber for combustion. However, because the mixed gas is flammable, when the combustion rate exceeds the mixed gas supply rate, the flame can easily propagate along the pipeline, burning any remaining mixed gas that has not yet entered the combustion chamber. This can lead to flashback or flameout, compromising safety.

[0077] This application addresses the aforementioned issues by providing a burner that, while not requiring a premixing chamber, utilizes its own structure to uniformly mix air and gas within a mixing zone outside the burner, forming a combustible mixed gas. This mixed gas is then ignited at the edge of the external recirculation zone, forming a stable combustion flame. The lack of a premixing chamber makes flashback and flameout less likely to occur, and the cross-jet flow of air and gas within the mixing zone ensures effective mixing and, consequently, combustion.

[0078] See Figure 1-Figure 3 One embodiment of the present invention provides a burner comprising a first housing 1, a second housing 2, and a plurality of distribution components 3. The first housing 1 is used to contain and uniformly distribute air. The second housing 2 is used to contain gas. The distribution components 3 are used to uniformly distribute the gas within the second housing 2, allowing the uniformly distributed gas to intersect with the uniformly distributed air, thereby forming a mixed gas.

[0079] A first air inlet 14 is provided on the first shell 1 , a first cavity 15 communicating with the first air inlet 14 is provided inside the first shell 1 , and a plurality of first air outlet groups 16 communicating with the first cavity 15 are provided on the outer peripheral surface of the first shell 1 , and the first air outlet groups 16 are evenly distributed around the axis of the first shell 1 .

[0080] Specifically, see Figure 3 The first housing 1 includes a mounting shell 11, a mounting flange 12 and an end cover 13. The mounting flange 12 and the end cover 13 are respectively arranged at the axial ends of the mounting shell 11. Figure 1 and Figure 3 The first cavity 15 is formed by the mounting flange 12, the end cap 13, and the inner circumference of the mounting shell 11. The mounting flange 12 is used to assist in mounting the burner on a designated device. The first air inlet 14 and a plurality of first air outlets are provided on the mounting shell 11, ensuring that the overall length of the space occupied by the first shell 1 remains unchanged after it is mounted on the designated device via the mounting flange 12.

[0081] More specifically, the longitudinal cross-section of the mounting shell 11 perpendicular to the axis is annular. A plurality of first air outlets are evenly distributed along the circumference of the outer surface of the mounting shell 11. Furthermore, a plurality of first mounting openings 17 are disposed around the outer surface of the mounting shell 11. Both the first mounting openings 17 and the first air outlet group 16 communicate with the first cavity 15, and the first mounting openings 17 are spaced apart from the first air outlets.

[0082] See Figure 1The second shell 2 is arranged in the first cavity 15, and an air chamber for air to pass through is formed between the outer wall of the second shell 2 and the inner wall of the first cavity 15. A second air inlet 24 is provided on the second shell 2, and a second cavity 25 communicating with the second air inlet 24 is provided inside the second shell 2.

[0083] Specifically, see Figure 1 and Figure 3 The second housing 2 includes an inlet section 21, a transition section 22, and a main section 23. The inlet section 21 and the main section 23 are connected and arranged at the axial ends of the transition section 22, and the diameter of the inlet section 21 is smaller than that of the main section 23. The smaller diameter of the inlet section 21 facilitates its adaptation to gas pipelines with similarly smaller diameters, thereby facilitating assembly. The inlet section 21 passes through and is fixed to the mounting flange 12. By passing the inlet section 21 through and fixing it to the mounting flange 12, the stability between the first housing 1 and the second housing 2 is ensured, while also allowing external gas to enter the transition section 22 and the main section 23 through the inlet section 21.

[0084] More specifically, see Figure 5 A plurality of second mounting openings 26 are disposed around the outer circumference of the second housing 2, centered about the axis of the second housing 2. Specifically, the longitudinal cross-section of the main body section 23 perpendicular to the axis is annular, and the plurality of second mounting openings 26 are uniformly disposed along the circumference of the outer circumference of the main body section 23.

[0085] See Figure 2 and Figure 7 The distribution member 3 has a first end 34 and a second end 35 opposite to each other in the radial direction of the second shell 2. The first ends 34 of several distribution members 3 are arranged on the outer peripheral surface of the second shell 2 with the axis of the second shell 2 as the axis. The second ends 35 of several distribution members 3 all pass through the first shell 1 and are located on the outside of the first shell 1. The several distribution members 3 divide the first cavity 15 into several separate cavities 151 surrounding the axis of the second shell 2. The several separate cavities 151 are respectively connected to the several first air outlet groups 16.

[0086] Specifically, see Figure 2 、 Figure 4 and Figure 5The first ends 34 of the distribution members 3 are respectively positioned on the second mounting openings 26, and the second ends 35 of the distribution members 3 respectively pass through the first mounting openings 17, with the outer circumference of the distribution members 3 abutting the inner circumference of the first mounting openings 17. The portion of the distribution member 3 located between the first shell 1 and the second shell 2 radially divides the air chamber into a plurality of separate cavities 151, allowing the first air outlet groups 16 to communicate with the separate cavities 151, thereby evenly distributing the gas within the first shell 1. When gas is input into the first shell 1, it enters the separate cavities 151 and is evenly discharged through the first air outlet groups 16.

[0087] In addition, see Figure 2 、 Figure 3 and Figure 6 Each distribution element 3 is provided with a second air outlet group 37 on two opposing sides, and the line connecting the two second air outlet groups 37 is perpendicular to the radial and axial directions of the second housing 2. A third cavity 31 is defined within the distribution element 3, and the second air outlet group 37 communicates with the second cavity 25 through the third cavity 31. The outer circumference of the first housing 1 and the two adjacent distribution elements 3 form a mixing zone 5. The second air outlet group 37 and the first air outlet group 16 are both located within the mixing zone 5. The intersection of the axes of the second air outlet group 37 and the first air outlet group 16 is located within the mixing zone 5.

[0088] Specifically, the distribution member 3 has a plate-like structure, which is simple and easy to manufacture. Second gas outlet groups 37 are provided on both the first and second sides 32, 33 of the distribution member 3, which face each other. Both the first and second sides 32, 33 are perpendicular to the second shell 2. By ensuring that both the first and second sides 32, 33 are perpendicular to the second shell 2, the distance between adjacent distribution members 3 is consistent, and thus the distance between adjacent second gas outlet groups 37 is also consistent. A through-port 36 is provided on the first end 34 of the distribution member 3, connecting the third cavity 31 to the second cavity 25 via the through-port 36. When gas is introduced into the second shell 2, the gas enters the third cavity 31 through the second cavity 25 and the through-port 36 and is evenly discharged through the second gas outlet group 37.

[0089] The first end 34 of the distribution member 3 is perpendicular to the first side surface 32 and the second side surface 33 of the distribution member 3 where the second air outlet group 37 is located. The second end 35 of the distribution member 3 is also perpendicular to the first side surface 32 and the second side surface 33 of the distribution member 3 where the second air outlet group 37 is located.

[0090] In addition, the number of the second air outlet groups 37 on the first side surface 32 of the distribution element 3 is consistent with the number of the second air outlet groups 37 on the second side surface 33 of the distribution element 3 , and both can be one group, or two or more groups.

[0091] See Figure 1 and Figure 9 When the burner of the present application is in use, air is input into the interior of the first shell 1 through the first air inlet 14, so that the air is respectively input into the plurality of first air outlet groups 16 through the plurality of separate cavities 151, and finally input into the mixing zone 5 through the plurality of first air outlet groups 16. Gas is input into the interior of the second shell 2 through the second air inlet 24, so that the gas is respectively input into the plurality of second air outlet groups 37 through the plurality of distribution members 3, and finally enters the mixing zone 5 through the second air outlet group 37. The air and gas in the mixing zone 5 form a cross jet after contact, forming an internal recirculation that is conducive to ignition. The flow causes the air and gas to mix strongly to form a mixed gas. Similar to the combustion characteristics of a swirl burner, after the mixed gas is ignited, the flame will spread outward from the inner edge of the inner reflow area. At the same time, an external reflow will be formed on the periphery of the airflow, and the external reflow will also draw in high-temperature flue gas to heat the mixed gas, thereby forming a stable burning flame. Since there is no premixing chamber, the air and gas are mixed and ignited outside the first shell, so backfire accidents or flameouts are not prone to occur, thereby ensuring safety. At the same time, the cross jet can ensure the mixing effect of air and gas, thereby ensuring the combustion effect.

[0092] See Figure 3 In one embodiment, the first shell 1 and the second shell 2 are coaxially arranged. The first air outlet group 16 includes a plurality of first air outlet monomers 161 evenly distributed along the axis of the first shell 1, and the second air outlet group 37 includes a plurality of second air outlet monomers 371 evenly distributed along the axis of the first shell 1. By evenly distributing the plurality of first air outlet monomers 161 and the plurality of second air outlet monomers 371, air and gas are uniformly output through the plurality of first air outlet monomers 161 and the plurality of second air outlet monomers 371, respectively. This ensures uniform combustion of the mixed gas, preventing the generation of harmful gases due to concentrated combustion and also preventing damage to the burner caused by the high temperatures generated by concentrated combustion.

[0093] Specifically, the number of the first outlet cells 161 in each first outlet group 16 is the same as or ±1 of the number of the second outlet cells 371 in each second outlet group 37 .

[0094] More specifically, the number of the first air outlet units 161 in each first air outlet group 16 is 5-50, and the number of the second air outlet units 371 in each second air outlet group 37 is 5-50.

[0095] Furthermore, the second outlet unit 371 can be circular or elliptical, with a circular diameter of 1-3 mm and a minor axis length of 1-3 mm. The second outlet unit 371 can also be square or rectangular, with a side length of the square and a minor axis length of the rectangle of 1-3 m.

[0096] See Figure 9 The distance L between the second outlet unit 371 and the second end 35 of the distribution member 3 satisfies 3D≤L≤30D, and the thickness W of the distribution member 3 satisfies D≤W≤10D, where D is the aperture of the second outlet group 37. This dimension restriction ensures that the burner has good external and internal recirculation effects, thereby ensuring combustion quality.

[0097] That is, if W>10D, it is not conducive to flame transfer between the flames in the mixing zone 5 where the two inner reflows 6 are located; if W is less than D, the area where the outer reflow 7 is located will be too small, resulting in unstable combustion.

[0098] If L is less than 3D, the mixing effect of gas and air in the mixing zone 5 will be insufficient, resulting in poor combustion effect; if L>30D, the overall structure of the burner will occupy too much space and will not be compact enough.

[0099] See Figure 1 and Figure 8 In one embodiment, the burner further includes a gas distributor 4, which is sleeved onto the second housing 2 and abuts the inner circumference of the first cavity 15. The gas distributor 4 is provided with a plurality of gas adjustment ports 43, each of which communicates with the air chamber. The gas distributor 4 evenly distributes the gas within the first housing 1 so that the gas is uniformly output through the plurality of first gas outlet groups 16.

[0100] Specifically, the air distributor 4 is coaxial with the first and second housings 1 and 2. The inner circumference of the air distributor 4 abuts the outer circumference of the main body section 23, and the outer circumference of the air distributor 4 abuts the inner circumference of the mounting shell 11. A plurality of air regulating ports 43 are evenly distributed along the circumference of the air distributor 4, and each of these ports 43 communicates with the plurality of first air outlet groups 16 through a plurality of separate cavities 151.

[0101] In one embodiment, the gas distributor 4 includes an annular plate 41 and a plurality of cyclone teeth 42. A plurality of gas-regulating ports 43 are arranged circumferentially on the annular plate 41. The cyclone teeth 42 are disposed along the edges of the gas-regulating ports 43, and an angle is formed between the cyclone teeth 42 and the end surface of the annular plate 41. The cyclone teeth 42 guide the flow of gas, and by varying the angle, the flow of gas can be altered accordingly, thereby coordinating with the second gas outlet group 37 to guide and rectify the flame airflow as needed.

[0102] Specifically, the shape of the gas adjustment port 43 is consistent with that of the cyclone tooth 42, both being triangular. When the gas enters the separate cavity 151 through the gas adjustment port 43, the cyclone tooth 42 can guide the flow of the gas, causing the gas to form a swirl within the separate cavity 151, thereby causing the gas to be output at a certain angle on the first gas outlet monomer 161. Different angles will result in different positions of the internal reflux 6 of the gas within the mixing zone 5, and thus change the position of the external reflux 7. Therefore, by adjusting the angle between the cyclone tooth 42 and the gas adjustment port 43, the shape and position of the flame can be adjusted.

[0103] In one embodiment, the angle a between the axis of the second outlet monomer 371 and the radial direction of the first shell 1 is 0-60 degrees. The flame airflow can be guided and rectified by the cooperation between the second outlet monomer 371 with an inclined angle and the cyclone teeth 42 with an inclined angle.

[0104] Specifically, see Figure 7 The second gas outlet monomer 371 is a straight hole or an oblique hole, and the angle a between the axis of the second gas outlet monomer 371 and the axis of the first shell 1 is 0-60°.

[0105] Furthermore, when the angle between the axis of the second gas outlet unit 371 and the axis of the first housing 1 is 0°, the distance between the gas nozzle farthest from the burner center and the second end 35 of the distribution member is 3D ≤ L ≤ 30D. When the angle between the axis of the second gas outlet unit 371 and the axis of the first housing 1 is 60°, the distance between the gas nozzle farthest from the burner center and the second end 35 of the distribution member is 5D ≤ L ≤ 50D. D represents the aperture of the second gas outlet group 37.

[0106] In one embodiment, the second air outlet group 37 includes a plurality of second air outlet monomers 371 evenly distributed along the axis of the first shell, and the aperture of the second air outlet monomers 371 is 1-3 mm. Existing burners that use full premixed combustion technology are generally metal fiber burners, and the aperture of the metal fiber burner is at the micron level. Therefore, when the air contains particulate matter, it is easy to get clogged, affecting the use effect. The second air outlet monomers 371 of the present application are at the millimeter level. When the area heat intensity and volume heat intensity are close, the aperture of the millimeter-level air outlet monomer is larger than the aperture of the micron-level metal fiber hole. Therefore, compared with traditional metal fiber burners, this burner is not prone to burning due to clogging.

[0107] When the burner of the present application is used, air is input into the interior of the first shell 1 through the first air inlet 14, so that the air can enter several separate cavities 151 respectively through several air adjustment ports 43. During the entry process, the cyclone teeth 42 can guide the flow direction of the gas, so that the gas forms a vortex in each separate cavity 151, and then the gas is output to the mixing zone 5 at a certain angle on each first air outlet monomer 161.

[0108] Gas is introduced into the second housing 2 through the second air inlet 24, enters the third cavities 31 of the plurality of distribution members 3 through the opening 36, and is ultimately uniformly output to the mixing zone 5 through the plurality of second gas outlet units 371. Air and gas form cross jets in the mixing zone 5 to form a mixed gas.

[0109] When air and gas form cross jets in the mixing zone 5, an internal recirculation 6 is formed, which causes an external recirculation 7 to form on the leeward side of the distribution element 3, so that the mixed gas can be ignited on the edge area where the external recirculation 7 is formed and form a stable burning flame.

[0110] The burner of the present application evenly distributes air and gas through the first shell 1 and the second shell 2, so that the distributed air and gas can be mixed and ignited outside the first shell 1 by means of cross jets. The cross jets can ensure the mixing effect of air and gas, thereby ensuring the combustion effect. At the same time, no premixing chamber is required for external mixing, so the burner is not prone to backfire accidents or flameout, thereby ensuring safety.

[0111] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The above embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A burner, characterized in that: include: A first shell (1), wherein the first shell (1) is provided with a first air inlet (14), the interior of the first shell (1) is provided with a first cavity (15) communicating with the first air inlet (14), and the outer peripheral surface of the first shell (1) is provided with a plurality of first air outlet groups (16) communicating with the first cavity (15), wherein the plurality of first air outlet groups (16) are evenly distributed around the axis of the first shell (1); a second shell (2), the second shell (2) being arranged in the first cavity (15), and an air chamber for air to pass through is formed between the outer wall of the second shell (2) and the inner wall of the first cavity (15), the second shell (2) being provided with a second air inlet (24), and the interior of the second shell (2) being provided with a second cavity (25) communicating with the second air inlet (24); A plurality of distribution members (3), wherein a third cavity (31) is provided inside the distribution member (3), a second air outlet group (37) is provided on the distribution member (3), and the second air outlet group (37) is communicated with the second cavity (25) through the third cavity (31), the distribution member (3) has a first end (34) and a second end (35) opposite to each other in the radial direction of the second shell (2), the first ends (34) of the plurality of distribution members (3) are arranged around the outer peripheral surface of the second shell (2) with the axis of the second shell (2) as the axis, the second ends (35) of the plurality of distribution members (3) all pass through the first shell (1) and are located outside the first shell (1), the outer peripheral surface of the first shell (1) cooperates with two adjacent distribution members (3) to form a mixing zone (5), and the second air outlet group (37) and the first air outlet group (16) are both located in the mixing zone (5); The distribution member (3) is provided with a second air outlet group (37) on two opposite side surfaces, and the connecting line of the two second air outlet groups (37) is perpendicular to the radial direction and the axial direction of the second shell (2).

2. The burner according to claim 1, characterized in that The distribution member (3) is a plate-shaped structure, and the second air outlet group (37) is provided on the first side surface (32) and the second side surface (33) of the distribution member (3) which are separated from each other, and the first side surface (32) and the second side surface (33) are both perpendicular to the second shell (2).

3. The burner according to claim 1, characterized in that The burner further comprises an air distributor (4), which is sleeved on the second shell (2) and abuts against the inner circumference of the first cavity (15). The air distributor (4) is provided with a plurality of air regulating ports (43), and the plurality of air regulating ports (43) are all communicated with the air chamber.

4. The burner according to claim 3, characterized in that The gas distributor (4) comprises an annular plate (41) and a plurality of cyclone teeth (42), wherein the plurality of gas regulating ports (43) are arranged on the annular plate (41) along a circumferential direction, and the plurality of cyclone teeth (42) are respectively arranged on the edges of the plurality of gas regulating ports (43), and an angle is formed between the cyclone teeth (42) and the end surface of the annular plate (41).

5. The burner according to claim 1, characterized in that The first shell (1) and the second shell (2) are coaxially arranged, the first air outlet group (16) includes a plurality of first air outlet monomers (161) evenly distributed along the axis of the first shell, and the second air outlet group (37) includes a plurality of second air outlet monomers (371) evenly distributed along the axis of the first shell.

6. The burner according to claim 5, characterized in that The angle a between the axis of the second gas outlet unit (371) and the radial direction of the first shell (1) is 0-60°.

7. The burner according to claim 1, characterized in that The second air outlet group (37) comprises a plurality of second air outlet monomers (371) evenly distributed along the axis of the first shell, and the aperture of the second air outlet monomers (371) is 1-3 mm.

8. The burner according to claim 7, characterized in that The distance L between the second outlet monomer (371) and the second end (35) of the distribution member (3) satisfies 3D≤L≤30D, and the thickness W of the distribution member (3) satisfies D≤W≤10D, where D is the aperture of the second outlet monomer (371).

9. The burner according to claim 1, characterized in that The first shell (1) comprises a mounting shell (11), a mounting flange (12) and an end cover (13); the mounting flange (12) and the end cover (13) are respectively arranged at two axial ends of the mounting shell (11); the first air inlet (14) and a plurality of the first air outlets are all arranged on the mounting shell (11).

10. The burner according to claim 9, characterized in that The second shell (2) comprises an inlet section (21), a transition section (22) and a main section (23); the inlet section (21) and the main section (23) are respectively connected and arranged at the axial ends of the transition section (22); the caliber of the inlet section (21) is smaller than the caliber of the main section (23); the inlet section (21) is passed through and fixed on the mounting flange (12); and a plurality of the second air outlets are all arranged on the main section (23).

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