Array type micro-premixing burner

Abstract

The invention provides an array type micro-premixing combustor. The array type micro-premixing combustor comprises a premixing assembly, a gas supply part and a combustion chamber assembly. The premixing assembly comprises a shell and a premixing pipe array, the premixing pipe array comprises a first mounting plate, a partition plate and at least one fuel premixing pipe with one end open, the first mounting plate and the partition plate are connected with the fuel premixing pipe, and the partition plate is located in the middle of the fuel premixing pipe. At least one fuel gas inlet communicated with the fuel cavity is formed in the gas supply part; the combustion chamber assembly is connected with the premixing assembly, the combustion chamber assembly and at least one part of the premixing assembly jointly define a combustion cavity with an opening in one end, and an opening of the fuel premixing pipe communicates with the combustion chamber. According to the array type micro-premixing combustor, the tempering phenomenon during combustion of hydrogen-rich / pure hydrogen fuel can be effectively prevented, the working stability of the micro-premixing combustor is improved, meanwhile, the hydrogen / air mixing uniformity of a nozzle of the micro-premixing combustor is improved, NOx emission is effectively reduced, and the safety and low emission of combustion of the hydrogen-rich / pure hydrogen fuel are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of burners, and in particular to an array type micro premixed burner. Background Art

[0002] Gas turbines are highly efficient and clean power machinery, and are by far the most efficient heat-to-power conversion power generation equipment. In order to meet the needs of lower nitrogen oxide emissions and reduce carbon emissions, the development of gas turbines shows a trend of low emissions, high parameters, and flexible fuel operation. An effective way to achieve low carbon emissions is to use hydrogen-rich fuels for combustion. The use of hydrogen-rich fuels can increase the peak temperature of the gas and achieve higher parameter operation of the gas turbine. However, high gas temperatures will increase NOx emissions and there is a risk of flashback. Therefore, the existing widely used swirl lean premixed combustion technology can no longer fully adapt to these new changes, and it is necessary to develop new combustion organization technologies for hydrogen-rich fuels.

[0003] Although some premixed burners already exist in the prior art, the combustion used in the prior art either cannot achieve ranged mixing of the fuel, increasing the local equivalence ratio at the outlet, causing high NOx emissions; or the internal overall mixing structure is large, and once flashback occurs when burning hydrogen-rich or pure hydrogen fuels, there will be extremely high safety risks.

[0004] Therefore, the prior art has problems of poor combustion emissions and unstable flames caused by uneven mixing in pure hydrogen fuel micro-premixed combustion. Summary of the invention

[0005] The main purpose of the present invention is to provide an array type micro-premixed burner to solve the problems of poor combustion emissions and unstable flame caused by uneven mixing in pure hydrogen fuel micro-premixed combustion in the prior art in the related art.

[0006] In order to achieve the above object, according to one aspect of the present invention, an array type micro premixed burner is provided, comprising:

[0007] A premixing assembly, the premixing assembly comprises a shell and a premixing tube array, the shell is a cylindrical structure with openings at both ends, a first chamber is formed inside the cylindrical structure, the premixing tube array comprises a first mounting plate, a partition plate and at least one fuel premixing tube with an opening at one end, wherein the first mounting plate and the partition plate are respectively connected to the fuel premixing tube, at least a part of the premixing tube array can be accommodated in the first chamber, the partition plate is located in the middle of the fuel premixing tube, and can be sealed and connected to the inner wall of the shell, so as to divide the first chamber into an air chamber and a fuel chamber, the first mounting plate is located on the side close to the opening of the fuel premixing tube, connected to the shell and closes the air chamber, the shell is provided with at least one air inlet connected to the air chamber, the fuel premixing tube is provided with a first hole array and a second hole array, the first hole array is located in the air chamber, and the second hole array is located in the fuel chamber;

[0008] An air supply portion, the air supply portion is connected to one end of the shell and is capable of closing the fuel cavity, and the air supply portion is provided with at least one fuel air inlet communicating with the fuel cavity;

[0009] A combustion chamber assembly, wherein the combustion chamber assembly is connected to the premixing assembly and together with at least a portion of the premixing assembly, forms a combustion chamber with an opening at one end, the opening of the fuel premixing tube is connected to the combustion chamber, and at least a portion of the combustion chamber assembly is made of a transparent material.

[0010] Furthermore, the premixing tube array includes 9 fuel premixing tubes, and the 9 fuel premixing tubes form a 3*3 premixing tube array.

[0011] Furthermore, the nine fuel premixing tubes are arranged in a uniformly distributed square.

[0012] Further, the volume of the air cavity is greater than the volume of the fuel cavity.

[0013] Furthermore, the first hole array and the second hole array each include a plurality of through holes evenly distributed on the side wall of the fuel premixing tube.

[0014] Furthermore, the first hole array and the second hole array both include multiple layers of through holes evenly distributed on the side wall of the fuel premixing tube, and the through holes on the same layer are spaced 90 degrees apart and evenly distributed in the circumferential direction of the fuel premixing tube.

[0015] Furthermore, the combustion chamber assembly comprises:

[0016] A bracket, wherein a plurality of brackets are provided, and two clamping grooves are provided on the bracket;

[0017] Side walls, the side walls are provided in plurality, both ends of the side walls are respectively clamped in the clamping grooves, and are connected in sequence end to end;

[0018] A second mounting plate, the second mounting plate is connected to the first mounting plate, the second mounting plate is provided with an avoidance opening for the premixed fuel in the fuel premixing tube to pass through, and the second mounting plate is provided with mounting grooves distributed in a square shape on one side away from the first mounting plate, and the mounting grooves are configured to accommodate and fix the ends of the bracket and the side wall.

[0019] Furthermore, the side wall is made of high-transmittance quartz glass.

[0020] Further, the cross section of the first chamber is circular, and the cross section of the fuel premixing tube is circular.

[0021] Furthermore, a sealing portion is provided on the partition plate.

[0022] Furthermore, the open end of the fuel premixing tube is arranged to protrude from the surface of the first mounting plate.

[0023] Furthermore, the premixing assembly is connected to the combustion assembly via a flange, and the premixing assembly is connected to the air supply portion via a flange.

[0024] By applying the technical solution of the present invention, an array of premixing tubes is set up and an air jet cross-flow fuel mixing mode is adopted to improve the uniformity of hydrogen / air gas mixing, avoid the occurrence of local high temperature areas, effectively reduce NOx emissions, and avoid the diffusion of fuel to the air side, thereby avoiding the risk of explosion; the array nozzle can effectively increase the average flow rate of the hydrogen-rich / pure hydrogen fuel and air mixed gas outlet, and prevent the phenomenon of hydrogen flame flashback causing burner burning; by setting the first hole array and the second hole array, the collision effect of the gas is effectively enhanced, and a high turbulence intensity and a stronger vortex can be formed inside the fuel premixing tube, which can effectively promote the mixing uniformity and mixing efficiency of the hydrogen-rich / pure hydrogen fuel; and all the jet micropores are arranged symmetrically, so that a symmetrical and stable flow field can be formed inside the premixing tube array, ensuring that no local high temperature will be generated during combustion to damage the burner and preventing flame shaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 A schematic structural diagram of an array type micro premixed burner according to the present invention is shown;

[0027] Figure 2A cross-sectional view of an array micro-premixed burner according to the present invention is shown;

[0028] Figure 3 A schematic diagram of the structure of a premixing tube array of an array type micro premixing burner according to the present invention is shown;

[0029] Figure 4 Shows Figure 3 Sectional view along section AA;

[0030] Figure 5 A top view of a premixing tube array of an array type micro premixing burner according to the present invention is shown;

[0031] Figure 6 A schematic structural diagram of a shell of an array type micro premixed burner according to the present invention is shown;

[0032] Figure 7 Shows Figure 6 Sectional view along section BB;

[0033] Figure 8 A schematic structural diagram of an air supply part of an array type micro premixed burner according to the present invention is shown;

[0034] Fig. 9 Shows Figure 8 Cross-sectional view along CC section;

[0035] Fig.10 A schematic structural diagram of a second mounting plate of an array type micro premixed burner according to the present invention is shown;

[0036] Fig.11 Shows Fig. 9 Cross-sectional view along section DD.

[0037] The above drawings include the following reference numerals:

[0038] 10. Premixing assembly; 11. Shell; 111. First chamber; 1111. Air cavity; 1112. Fuel cavity; 112. Third mounting plate; 113. Fourth mounting plate; 114. Air inlet; 12. Premixing tube array; 121. First mounting plate; 122. Partition plate; 123. Fuel premixing tube; 1231. First hole array; 1232. Second hole array; 20. Air supply section; 21. Fuel inlet; 22. Fifth mounting plate; 30. Combustion chamber assembly; 31. Bracket; 32. Side wall; 33. Second mounting plate; 331. Mounting groove 331. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0042] In order to solve the problems of poor combustion emissions and unstable flames caused by uneven mixing in pure hydrogen fuel micro-premixed combustion in the prior art, the present application provides an array micro-premixed burner.

[0043] like Figures 1 to 11As shown, the first embodiment of the present application provides an array type micro premixing burner, comprising a premixing assembly 10, an air supply unit 20 and a combustion chamber assembly 30; wherein the premixing assembly 10 comprises a shell 11 and a premixing tube array 12, the shell 11 is a cylindrical structure with openings at both ends, a first chamber 111 is formed inside the cylindrical structure, and at least a part of the premixing tube array 12 can be accommodated in the first chamber 111. The premixing tube array 12 comprises a first mounting plate 121, a partition plate 122 and at least one fuel premixing tube 123 with an opening at one end, wherein the first mounting plate 121 and the partition plate 122 are respectively connected to the fuel premixing tube 123, the partition plate 122 is located in the middle of the fuel premixing tube 123, and can be sealed and connected to the inner wall of the shell 11, thereby dividing the first chamber 111 into an air chamber 1111 and a fuel chamber 1112 respectively located on both sides of the partition plate 122. The first mounting plate 121 is located on a side close to the opening of the fuel premixing tube 123, and is connected to the housing 11, so as to close the air cavity 1111. The housing 11 is provided with at least one air inlet 114 communicating with the air cavity 1111, so that external fresh air or oxygen can enter the air cavity 1111 through the air inlet 114.

[0044] Among them, for example, four air inlets 114 can be provided, evenly distributed on the outer periphery of the shell 11; the fuel premixing tube 123 is provided with a first hole array 1231 and a second hole array 1232, the first hole array 1231 is located in the air cavity 1111, and the second hole array 1232 is located in the fuel cavity 1112, so that the gas in the air cavity 1111 and the fuel cavity 1112 can enter the fuel premixing tube 123 through the first hole array 1231 and the second hole array 1232 respectively for mixing. The air supply part 20 is connected to the end of the shell 11 away from the first mounting plate 121, and can close the fuel cavity 1112. The air supply part 20 is provided with at least one fuel inlet 21 that communicates with the fuel cavity 1112, and the gas fuel can enter the fuel cavity 1112 through the fuel inlet 21.

[0045] The combustion chamber assembly 30 is connected to the premixing assembly 10, and together with at least a portion of the premixing assembly 10, forms a combustion chamber with an opening at one end. The opening of the fuel premixing pipe 123 is connected to the combustion chamber. At least a portion of the combustion chamber assembly 30 is made of transparent material.

[0046] Furthermore, the premixing tube array 12 is machined and welded from 316 stainless steel, which is more corrosion-resistant at high temperatures, to enhance the strength and service life of the premixing tube array 12. The premixing tube array 12 includes 9 fuel premixing tubes 123, which form a 3*3 premixing tube array 12 and are located at the center of the first chamber 111; such an arrangement is more conducive to stabilizing the flow field structure inside the burner.

[0047] Specifically, the nine fuel premixing tubes 123 are arranged in a uniformly distributed square shape, thereby making it easier to improve the consistency of processing.

[0048] In order to further improve the mixing effect of fuel and air, the air chamber 1111 and the fuel chamber 1112 are separately arranged, and the fuel chamber 1112 is connected to the fuel inlet 21 and fuel is introduced into it, which is beneficial to reduce nitrogen oxide emissions, maintain uniform temperature distribution inside the combustion chamber, and increase the service life of the burner.

[0049] The partition plate 122 is also provided with a sealing portion to prevent flashback and explosion under extreme working conditions; preferably, the sealing portion can be a sealing ring, such as a rubber ring. The open end of the fuel premixing tube 123 is located in the combustion chamber. Preferably, the open end of the fuel premixing tube 123 protrudes from the surface of the first mounting plate 121 to form a raised lip structure for stabilizing the root combustion of the hydrogen-rich / pure hydrogen fuel flame, anchoring the flame near the lip, and preventing local flameout from causing the flame to blow out.

[0050] In a specific embodiment of the present application, the first hole array 1231 and the second hole array 1232 each include a plurality of through holes evenly distributed on the side wall of the fuel premixing tube 123. Preferably, the first hole array 1231 and the second hole array 1232 each include multiple layers of through holes evenly distributed on the side wall of the fuel premixing tube 123, and the through holes on the same layer are spaced 90 degrees apart from each other and evenly distributed in the circumferential direction of the fuel premixing tube 123. For example, the first hole array 1231 may be designed with 12 symmetrically distributed air jet micropores on each individual fuel premixing tube 123, and the second hole array 1232 may be designed with 16 symmetrically distributed hydrogen-rich / pure hydrogen fuel jet micropores on each individual fuel premixing tube 123; thereby enhancing the turbulence intensity and vortex intensity inside the mixing channel and promoting the mixing of air and hydrogen-rich / pure hydrogen fuel.

[0051] The gas chamber is installed on the outside of the fuel premixing tube 123, and can form a stable gas pressure, which is used to provide stable and continuous fuel and air to the inside of the fuel premixing tube 123. The through holes on the side wall of the fuel premixing tube 123 are arranged symmetrically to ensure the symmetry of the internal flow field, thereby ensuring that there will be no uneven gas supply.

[0052] The combustion chamber assembly 30 includes a bracket 31, a side wall 32 and a second mounting plate 33. The bracket 31 and the side wall 32 are both provided with a plurality of them. The bracket 31 is provided with two clamping grooves, and the two ends of the side wall 32 are respectively clamped in the clamping grooves, and are connected in sequence head to tail; the second mounting plate 33 is connected to the first mounting plate 121, and the second mounting plate 33 is provided with an escape opening for the premixed fuel in the fuel premixing tube 123 to pass through. The second mounting plate 33 is provided with a square-shaped mounting groove 331 on one side away from the first mounting plate 121, and the mounting groove 331 is configured to accommodate the ends of the bracket 31 and the side wall and fix them. Preferably, the first mounting plate 121 and the second mounting plate 33 can be flanges.

[0053] In order to facilitate multi-parameter laser diagnosis, the side wall 32 is made of high-transmittance quartz glass. When performing multi-parameter laser diagnosis, the high-transmittance quartz glass can ensure the penetration of pulsed laser and the shooting of diagnostic signals such as components.

[0054] In a specific embodiment, four brackets 31 are provided and four side walls 32 are provided. The side walls 32 are of a rectangular structure. The four side walls 32 are connected in sequence at the ends to form a combustion chamber with a rectangular cross-section. During use, the bottom of the brackets 31 and the side walls 32 are respectively inserted into the mounting grooves 331 of the second mounting plate 33, thereby providing a hot atmosphere in the combustion field to stabilize the combustion of pure hydrogen fuel.

[0055] Furthermore, the housing 11 further includes a third mounting plate 112 and a fourth mounting plate 113 located at both ends of the cylindrical structure, wherein the third mounting plate 112 is used to be fixedly connected to the first mounting plate 121, and the third mounting plate 112 is used to be fixedly connected to the air supply unit 20. Preferably, bolt holes are evenly arranged on the third mounting plate 112 and the fourth mounting plate 113, and bolt connection is used to achieve fixed connection between the housing 11 and the premixing tube array 12 and between the housing 11 and the air supply unit 20. Preferably, the third mounting plate 112 and the fourth mounting plate 113 can be flanges.

[0056] The air supply portion 20 includes a fifth mounting plate 22 and a fuel air inlet 21, wherein the fuel air inlet 21 is arranged at the center of the fifth mounting plate 22, and the fifth mounting plate 22 is used to be fixedly connected to the fourth mounting plate 113, thereby closing the fuel cavity 1112. The fuel air inlet 21 is arranged at the center position to ensure that the fuel enters each independent fuel premixing tube 123 of the premixing tube array 12 evenly.

[0057] In a specific embodiment of the present application, the premixing tube array 12 is composed of 9 fuel premixing tubes 123, and the open ends of the fuel premixing tubes 123 form 9 nozzles, which are arranged in a square 3*3 arrangement. The thickness of the first connecting plate is 5mm, the wall thickness of the fuel premixing tube 123 is 1.5mm, the bottom thickness is 1mm, the internal depth of the fuel premixing tube 123 is 69mm, and the overall length is 70mm. The protruding height of the nozzle lip is 2mm, the inner diameter of a single nozzle is 3mm, and the center distance between the two nozzles is 10mm. The partition plate 122 is located in the middle of the premixing tube array 12, and a rubber ring is installed on the partition plate 122. The thickness of the partition plate 122 is 5mm. Each individual fuel premixing tube 123 on the upper part of the partition plate 122 is designed with 12 symmetrically distributed air jet micropores, and the length of the upper part of the partition plate 122 is 35mm, that is, the length of the air cavity 1111 part is 35mm. The lower part is designed with 16 symmetrically distributed jet microholes for hydrogen-rich / pure hydrogen fuel. The length of the lower part of the sealing section is 23mm, which plays a role in enhancing the turbulence intensity and vortex intensity inside the mixing channel and promoting the mixing of air and hydrogen-rich / pure hydrogen fuel. The first connecting plate is a metal disc with a diameter of 120mm, and 6 M8 threaded holes are distributed in a circle with a radius of 47mm on the upper edge of the metal disc.

[0058] The shell 11 is installed outside the premixing tube array 12, and a stable gas pressure can be formed inside to provide stable and continuous air and fuel to the inside of the array mixing flow channel to ensure that there is no uneven gas supply. The inside of the shell 11 is a cylindrical cavity with a diameter of 50mm and a height of 85mm, and a wall thickness of 5mm. The third connecting plate is a metal outer disc with a diameter of 120mm. Six M8 threaded holes are distributed along a circle with a radius of 47mm on the metal outer disc.

[0059] The gas supply part 20 is installed directly below the shell 11, and is used to pass hydrogen-rich / pure hydrogen fuel into the lower half of the gas chamber to ensure that the fuel gas can evenly enter each mixing flow channel. The fifth connecting plate is a metal outer disc with a diameter of 120mm, and 6 M8 threaded holes are distributed in a circle with a radius of 47mm on the metal outer disc.

[0060] The height of the optical window bracket 31 is 80 mm, and the size of the high-transmittance quartz glass is 46 mm*3 mm*80 mm.

[0061] The array micro-premix burner provided in the present application is applied, by setting an array of premixing tubes and adopting an air jet cross-flow fuel mixing mode, the uniformity of hydrogen / air gas mixing is improved, the occurrence of local high temperature areas is avoided, NOx emissions are effectively reduced, and the diffusion of fuel to the air side is avoided, avoiding the risk of explosion; the array nozzle can effectively increase the average flow rate of the hydrogen-rich / pure hydrogen fuel and air mixed gas outlet, and prevent the phenomenon of hydrogen flame flashback causing burner burning; by setting the first hole array and the second hole array, the collision effect of the gas is effectively enhanced, and a high turbulence intensity and a stronger vortex can be formed inside the fuel premixing tube, which can effectively promote the mixing uniformity and mixing efficiency of the hydrogen-rich / pure hydrogen fuel; and all the jet micropores are arranged symmetrically, and a symmetrical and stable flow field can be formed inside the premixing tube array, ensuring that no local high temperature will be generated during combustion to damage the burner and prevent flame shaking.

[0062] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0063] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0064] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An array type micro premixed burner, characterized in that: include: A premixing assembly, the premixing assembly comprises a shell and a premixing tube array, the shell is a cylindrical structure with openings at both ends, a first chamber is formed inside the cylindrical structure, the premixing tube array comprises a first mounting plate, a partition plate and at least one fuel premixing tube with an opening at one end, wherein the first mounting plate and the partition plate are respectively connected to the fuel premixing tube, at least a part of the premixing tube array can be accommodated in the first chamber, the partition plate is located in the middle of the fuel premixing tube, and can be sealed and connected to the inner wall of the shell, so as to divide the first chamber into an air chamber and a fuel chamber, the first mounting plate is located on the side close to the opening of the fuel premixing tube, connected to the shell and closes the air chamber, the shell is provided with at least one air inlet connected to the air chamber, the fuel premixing tube is provided with a first hole array and a second hole array, the first hole array is located in the air chamber, and the second hole array is located in the fuel chamber; An air supply portion, the air supply portion is connected to one end of the shell and is capable of closing the fuel cavity, and the air supply portion is provided with at least one fuel air inlet communicating with the fuel cavity; A combustion chamber assembly, wherein the combustion chamber assembly is connected to the premixing assembly and together with at least a portion of the premixing assembly, forms a combustion chamber with an opening at one end, the opening of the fuel premixing tube is connected to the combustion chamber, and at least a portion of the combustion chamber assembly is made of a transparent material.

2. The array type micro premixed burner according to claim 1, characterized in that: The premixing tube array includes 9 fuel premixing tubes, and the 9 fuel premixing tubes form a 3*3 premixing tube array.

3. The array type micro premixed burner according to claim 2, characterized in that: The nine fuel premixing tubes are arranged in a uniformly distributed square.

4. The array type micro premixed burner according to claim 1, characterized in that: The volume of the air cavity is greater than the volume of the fuel cavity.

5. The array type micro premixed burner according to claim 1, characterized in that: The first hole array and the second hole array both include a plurality of through holes evenly distributed on the side wall of the fuel premixing tube.

6. The array type micro premixed burner according to claim 1, characterized in that: The first hole array and the second hole array both include multiple layers of through holes evenly distributed on the side wall of the fuel premixing tube, and the through holes on the same layer are spaced 90 degrees apart and evenly distributed in the circumferential direction of the fuel premixing tube.

7. The array type micro premixed burner according to claim 1, characterized in that: The combustion chamber assembly comprises: A bracket, wherein a plurality of brackets are provided, and two clamping grooves are provided on the bracket; Side walls, the side walls are provided in plurality, both ends of the side walls are respectively clamped in the clamping grooves, and are connected in sequence end to end; A second mounting plate, the second mounting plate is connected to the first mounting plate, the second mounting plate is provided with an avoidance opening for the premixed fuel in the fuel premixing tube to pass through, and the second mounting plate is provided with mounting grooves distributed in a square shape on one side away from the first mounting plate, and the mounting grooves are configured to accommodate and fix the ends of the bracket and the side wall.

8. The array type micro premixed burner according to claim 7, characterized in that: The side wall is made of high-transmittance quartz glass.

9. The array type micro premixed burner according to claim 1, characterized in that: The cross section of the first chamber is circular, and the cross section of the fuel premixing tube is circular.

10. The array type micro premixed burner according to claim 1, characterized in that: The partition plate is provided with a sealing portion.

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