CN216408961U - Combustor and combustion device - Google Patents

Abstract

The application relates to the field of combustors, in particular to a combustor and a combustion device. The combustor comprises a mixed gas conveying pipe, a first combustion assembly, a shell, a fuel gas conveying pipe, a combustion-supporting gas conveying pipe and a second combustion assembly. The first combustion assembly and the second combustion assembly are both positioned in the shell, and the first combustion assembly comprises a porous medium combustion layer; the combustion-supporting gas conveying pipe and the fuel gas conveying pipe are both connected with the second combustion assembly; the second combustion assembly is positioned below the flue gas of the porous medium combustion layer, so that the flue gas of the porous medium combustion layer can flow through the second combustion assembly. The insufficiently combusted smoke after the porous medium combustion layer is guided by the shell to flow downwards to the area where the second combustion assembly is located for continuous combustion, so that the combustor has the advantages of sufficient combustion and uniform heat dissipation; in the combustion zone of the second combustion assembly, a local high pressure is created due to the elevated temperature of the air, causing the flue gases to be entrained and blended in the zone, further completing combustion while reducing the flame released.

Description

A burner and combustion device

technical field

The present application relates to the field of burners, and in particular, to a burner and a burning device.

Background technique

Porous media combustion is a combustion method in which porous media is added to the burner. Due to the existence of three heat exchange modes of convection, heat conduction and radiation, the burner added with porous media makes the temperature of the combustion area tend to be uniform and maintains a relatively stable temperature gradient. Porous media combustion has the advantages of high combustion rate, good combustion stability, good gas adaptability, and low emission of pollutants in flue gas.

However, there is a problem of insufficient combustion in the combustion process of the porous medium combustion layer.

Utility model content

The purpose of the embodiments of the present application is to provide a burner and a combustion device, which aim to improve the problem of insufficient combustion in the combustion process of the existing burner.

The present application provides a burner, which includes a mixture gas delivery pipe, a first combustion component, a casing, a gas delivery pipe, a combustion-supporting gas delivery pipe, and a second combustion component. The mixed gas conveying pipe is used for conveying the mixed gas of fuel gas and auxiliary gas; the first combustion component is located in the casing, the first combustion component includes a porous medium combustion layer, and the porous medium combustion layer is connected with the mixed gas conveying pipe; the gas conveying pipe is used for conveying fuel gas; The oxidant gas delivery pipe is used to transport the oxidant gas; the second combustion component is located in the casing; both the oxidant gas delivery pipe and the gas delivery pipe are connected with the second combustion component; the second combustion component is located below the porous medium combustion layer, so that the porous medium combustion layer The flue gas can flow through the second combustion assembly.

After the mixed gas is burned in the porous medium combustion layer, it has the advantages of good combustion stability, good gas adaptability, uniform heat dissipation, low nitrogen oxides in the flue gas, and less flame; the flue gas after the combustion of the porous medium combustion layer contains insufficient combustion. The gas flows to the area where the second combustion assembly is located under the guidance of the casing. The raw gas in the combustion area of the second combustion assembly is fuel gas and auxiliary combustion gas, and the aforementioned insufficiently combusted gas is more fully burned in this combustion area; in the second combustion area In the combustion area of the combustion component, the flue gas in the first combustion area is reheated, and local high pressure is formed due to the increase in air temperature, so that the flue gas is entrained and mixed in this combustion area, and the combustion is completed and the released gas is reduced. flame, giving it the characteristics of no flame or less flame.

In some embodiments of the present application, the first combustion assembly further includes a perforated plate, one end of the perforated plate is communicated with the mixed gas delivery pipe, and the other end is communicated with the porous medium combustion layer.

In some embodiments of the present application, the hole area of the cross-section of the perforated plate is smaller than the cross-sectional area of the mixed gas delivery pipe.

In some embodiments of the present application, the first combustion component further includes a thermal insulation shell, and the porous plate and the porous medium combustion layer are both located in the thermal insulation shell.

In some embodiments of the present application, the aperture of the porous plate is less than or equal to 1.2 mm.

In some embodiments of the present application, the burner further includes an air-mixing chamber connected to the outer casing, and the mixed-gas delivery pipe and the porous medium combustion layer are all communicated with the air-mixing chamber; An air distribution board is installed in the air chamber.

In some embodiments of the present application, the auxiliary gas delivery pipe is sleeved outside the gas delivery pipe;

The porous medium combustion layer surrounds the gas-supporting gas conveying pipe.

In some embodiments of the present application, the gas delivery pipe is sleeved outside the auxiliary gas delivery pipe;

The porous medium combustion layer surrounds the gas delivery pipe.

In some embodiments of the present application, the burner further includes a sleeve; the second combustion assembly includes a gas nozzle and a swirl fin; the swirl fin is disposed at the outlet of the gas delivery pipe, the The gas delivery pipe and the auxiliary gas delivery pipe are both connected with the gas nozzle; the gas nozzle is located in the sleeve.

The present application also provides a combustion device, which includes an air supply assembly and the above-mentioned burner connected to the air supply assembly.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present application more clearly, the following drawings will briefly introduce the drawings that need to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

FIG. 1 shows a schematic structural diagram of a burner provided by an embodiment of the present application from a first perspective;

FIG. 2 shows a schematic structural diagram of a burner provided by an embodiment of the present application from a second perspective;

FIG. 3 shows a schematic structural diagram of a burner provided by an embodiment of the present application from a third perspective;

FIG. 4 shows a cross-sectional view of the burner provided by the embodiment of the present application along the first cross-section;

FIG. 5 shows a cross-sectional view of the burner provided by the embodiment of the present application along the second cross-section;

FIG. 6 shows an enlarged view of part A in FIG. 4 .

Icon: 100-burner; 110-first combustion component; 111-insulation shell; 112-porous medium combustion layer; 113-porous plate; 120-second combustion component; 121-gas nozzle; 122-swirl vane; 123 -Igniter; 130-Mixed gas delivery pipe; 140-Shell; 141-Fume outlet; 150-Gas delivery pipe; .

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the application as claimed, but is merely representative of selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the embodiments of the present application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" The orientation or positional relationship indicated by "" etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that is usually placed when the application product is used, or the orientation or positional relationship that is commonly understood by those skilled in the art, It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application.

Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise expressly specified and limited, the terms "arrangement", "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed The connection can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

Example

FIG. 1 shows a schematic structural diagram of a burner 100 provided by an embodiment of the present application from a first perspective, FIG. 2 shows a schematic structural diagram of a burner 100 provided by an embodiment of the present application from a second perspective, and FIG. 3 shows an implementation of the present application. 4 shows a cross-sectional view of the burner 100 provided by the embodiment of the present application along the first section, and FIG. 5 shows the burner 100 provided by the embodiment of the present application along the first section. Sectional view of the second section. Please refer to FIG. 1 to FIG. 5 together, this embodiment provides a burner 100; the burner 100 has two combustion assemblies, a first combustion assembly 110 and a second combustion assembly 120, and a first combustion assembly 110 and a second combustion assembly The assembly 120 uses an independent air supply assembly for air supply.

Specifically, the burner 100 includes a first combustion assembly 110 , a second combustion assembly 120 , a mixed gas delivery pipe 130 , a casing 140 , a gas delivery pipe 150 and a combustion-supporting gas delivery pipe 160 . The mixed gas delivery pipe 130 is connected to the first combustion assembly 110 , the gas delivery pipe 150 and the auxiliary gas delivery pipe 160 are both connected to the second combustion assembly 120 , and the first combustion assembly 110 and the second combustion assembly 120 are both located in the casing 140 .

The mixed gas conveying pipe 130 is used for conveying the mixed gas of fuel gas and auxiliary combustion gas; the gas conveying pipe 150 is used for conveying the fuel gas; the auxiliary gas conveying pipe 160 is used for conveying the auxiliary combustion gas; in this application, the auxiliary gas can be air, oxygen, etc., The gas may be natural gas. It should be noted that, in this application, the type of auxiliary gas and the type of gas are not limited.

In the present application, the first combustion assembly 110 forms a combustion area, and the second combustion assembly 120 forms a combustion area; the flue gas combusted by the first combustion assembly 110 can be re-burned after passing through the combustion area formed by the second combustion assembly 120 .

FIG. 6 shows an enlarged view of part A in FIG. 4 . Please refer to FIGS. 1 to 6 together. The first combustion assembly 110 includes a heat preservation shell 111 , a porous medium combustion layer 112 and a porous plate 113 .

The porous medium combustion layer 112 is connected to the porous plate 113, and the thermal insulation shell 111 is surrounded by the porous medium combustion layer 112 and the porous plate 113; the mixed gas conveyed by the mixed gas delivery pipe 130 is first divided into multiple airflows through the porous plate 113 and then flows To the porous medium combustion layer 112 , it burns after reaching the ignition point; after the combustible gas burns in the porous medium combustion layer 112 , its flue gas is discharged to the opening (flue gas outlet 141 ) of the casing 140 along the inner wall of the casing 140 . The main function of the heat preservation shell 111 is to prevent the heat of the porous medium combustion layer 112 and the porous plate 113 from dissipating from the side, which can improve the utilization rate of heat. In this embodiment, the porous medium combustion layer 112 is approximately annular, and the flames burned by it are distributed in an annular shape; the porous medium combustion layer 112 is a silicon carbide porous ceramic medium burner, which has excellent high temperature resistance performance. The material of the perforated plate 113 is alumina; in some embodiments of the present application, the aperture of the perforated plate 113 is less than or equal to 1.2 mm, for example, the aperture may be 1.2 mm, 1 mm, 0.8 mm, 0.6 mm, and so on. The aperture of the perforated plate 113 is less than or equal to 1.2 mm, which is smaller than the quenching diameter of natural gas combustion, so that the perforated plate 113 has the effect of preventing tempering.

In this embodiment, the perforated plate 113 has a cross section along the direction perpendicular to the conveying direction of the mixed gas, and the sum of the hole areas of the aforementioned cross-sections of the perforated plate 113 is smaller than the cross-sectional area of the mixed gas conveying pipe 130; The sum of the areas of all the holes of the cross-section in the direction perpendicular to the extension direction is smaller than the area of the cross-section of the mixed gas delivery pipe 130; since the sum of the areas of the holes of the perforated plate 113 is smaller than the cross-sectional area of the mixed gas delivery pipe 130, the gas flows from the mixed gas delivery pipe. After 130 enters the inside of the porous plate 113, the pressure rises, so that the mixed gas flow rate of the gas entering each hole of the porous plate 113 can be kept consistent;

The following provides an example of the parameters of the first combustion assembly 110 in the embodiment of the present application when used:

The flow rate of the mixed gas in the alumina porous plate 113 is greater than the combustion speed of natural gas, and the flow rate of the mixed gas in the holes of the alumina porous plate 113 should be greater than 3m/s, such as 5m/s, 6m/s, etc., which can further reduce the alumina Risk of tempering of the perforated plate 113 .

The mixed gas in the mixed gas delivery pipe 130 ensures a high excess air coefficient. Exemplarily, the excess air coefficient of the mixed gas in the mixed gas delivery pipe 130 is 0.6-0.95, for example, 0.6, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, etc. If the excess air coefficient is low, the combustion temperature in the porous medium combustion layer 112 will decrease, and the atmosphere after combustion is a reducing atmosphere, which will cause the porous medium combustion layer 112 to be oxidized, which will reduce its service life. Atmospheres also lead to higher nitrogen oxide emissions. Selecting a mixture with an excess air coefficient of 0.6 to 0.95 can effectively improve the aforementioned problems.

It should be noted that the above only gives some examples of the use of the first combustion assembly 110 , and does not limit the use of only the above-mentioned parameters, and specific parameters can be selected according to the use scene.

It should be noted that, in other embodiments of the present application, the material of the porous medium combustion layer 112 can also be other refractory materials, not limited to silicon carbide; the shape of the porous medium combustion layer 112 can also be determined according to the usage scene of the burner 100 The arrangement is not limited to the aforementioned annular shape; correspondingly, the material of the porous plate 113 can also be other materials. The aperture of the porous plate 113 may be greater than 1.2 mm, for example, may be 3 mm, 2 mm, 1.5 mm, and the like. The pore size of each hole of the perforated plate 113 may be the same or not completely the same.

Further, in this embodiment, in order to make the mixed gas entering the first combustion assembly 110 burn more fully, the burner 100 further includes a gas mixing chamber 170, the outlet of the mixed gas delivery pipe 130 is communicated with the gas mixing chamber 170, and the mixed gas The gas in the conveying pipe 130 first enters the gas mixing chamber 170 for temporary storage and remixing before entering the first combustion component 110; The output air flow 170 enters the porous medium combustion layer 112 through the porous plate 113 . The air-mixing chamber 170 has the function of uniformly mixing the air again, and the air-mixing chamber 170 also has the function of temporarily storing the air-mixing.

In this embodiment, in order to make the air flow of the mixed gas entering the porous medium combustion layer 112 more uniform, an air distribution plate 171 is provided in the air mixing chamber 170, and the air distribution plate 171 is located at the opening of the mixed air conveying pipe 130, and the mixed air is conveyed. The air flow output from the pipe 130 is blocked by the air distribution plate 171 and then fills the air mixing chamber 170; it can avoid that the local air flow entering the porous medium combustion layer 112 is large due to the high air flow speed, and reduce the heat radiated through the porous medium combustion layer 112. uniformity.

It should be noted that, in some embodiments of the present application, the burner 100 may not be provided with the gas distribution plate 171 , or may not be provided with the gas mixing chamber 170 . Further, the first combustion assembly 110 may not be provided with the porous plate 113 and the thermal insulation shell 111 , but may only be provided with the porous medium combustion layer 112 , and the mixture conveying pipe 130 is directly connected to the porous medium combustion layer 112 .

As mentioned above, the second combustion assembly 120 is located in the outer casing 140, and along the flow direction of the flue gas of the porous medium combustion layer 112, the second combustion assembly 120 is located below the porous medium combustion layer 112, so that the flue gas of the porous medium combustion layer 112 flows. Can flow through the area where the second combustion assembly 120 is located.

Both the oxidant gas delivery pipe 160 and the gas delivery pipe 150 are connected to the second combustion assembly 120 , and the gas output from the gas delivery pipe 150 burns in the area where the second combustion assembly 120 is located under the assisted combustion of the oxidant gas output from the oxidant gas delivery pipe 160 .

In this embodiment, the second combustion assembly 120 includes a gas nozzle 121 , a swirl vane 122 and an igniter 123 . The swirl vane 122 is located at the outlet of the gas delivery pipe 150, and the igniter 123 is connected to the gas nozzle 121 to provide an ignition point for it. The swirl vane 122 has the function of making the gas output from the gas delivery pipe 150 more dispersed, so that the gas can be fully burned.

In the present application, the burner 100 further includes a sleeve 180, the gas nozzle 121 is located in the sleeve 180, and the sleeve 180 has the function of collecting the gas output by the combustion-supporting gas delivery pipe 160 and the gas delivery pipe 150, so that the gas output by the two Mix well within sleeve 180 and then burn. The material of the sleeve 180 can be, for example, silicon carbide. It is understood that, in other embodiments of the present application, the material of the sleeve 180 can be other refractory materials.

It should be noted that in other embodiments of the present application, the second combustion assembly 120 may not be provided with the swirl sheet 122, and accordingly, the igniter 123 is not necessary, and the igniter 123 may not be provided, and a burner needs to be used At 100, other independent ignition devices can be used to ignite.

In this embodiment, the outer casing 140 is in the shape of a truncated cone, and the casing 140 has a flue gas outlet 141. Compared with the porous medium combustion layer 112, the second combustion assembly 120 is closer to the flue gas outlet 141; the porous medium gas burner 112 is located in the casing. Under the guidance of the inner wall of 140 , it must pass through the second combustion assembly 120 .

In this embodiment, the porous medium gas burner 112 is annular, the porous medium combustion layer 112 is arranged around the inner peripheral wall of the outer casing 140, and the second combustion assembly 120 is located in the middle of the outer casing 140 in the radial direction; the porous medium gas burner 112 is annularly arranged It is arranged around the second combustion assembly 120. After the porous medium combustion layer 112 is burned, the incompletely burned flue gas continues to burn after passing through the area where the second combustion assembly 120 is located; the flue gas around the second combustion assembly 120 burns again, After the air is heated, a local high pressure will be formed, and the smoke will be entrained and mixed to achieve the purpose of further full combustion.

It should be noted that, in the embodiment of the present application, the outer casing 140 may be in other shapes, and may be set according to the usage scenario of the burner 100 , for example, it may be set in a square shape, etc., the porous medium gas burner 112 and the second combustion assembly 120 The positional relationship is also not limited to the aforementioned porous medium gas burner 112 surrounding the second combustion assembly 120, for example, the two may be arranged side by side.

Please refer to FIG. 5 and FIG. 6 again. In this embodiment, in order to reduce the volume of the burner 100 and avoid occupying a large space, the combustion-assistant gas delivery pipe 160 and the gas delivery pipe 150 are connected in a casing; In this embodiment, the auxiliary gas delivery pipe 160 and the gas delivery pipe 150 are both circular pipes, the auxiliary gas delivery pipe 160 is sleeved outside the gas delivery pipe 150, and the two are connected in the second combustion assembly 120, and the gas transported by the two is Combustion after contact is made at the location where the second combustion assembly 120 is located. The porous medium gas burner 112 is arranged around the gas-supporting gas delivery pipe 160 .

In other embodiments of the present application, it can be set that the gas delivery pipe 150 is sleeved outside the auxiliary gas delivery pipe 160; or, the auxiliary gas delivery pipe 160 and the gas delivery pipe 150 are arranged independently, both of which are connected to the second combustion assembly. 120 connections.

As an example, when the second combustion assembly 120 is used, for the embodiment in which the gas delivery pipe 150 transports natural gas and the auxiliary gas delivery pipe 160 transports air, the flow of air and natural gas can be adjusted so that the gas enters the second combustion assembly 120 The excess air coefficient of the gas is between 1.3 and 2.0, for example, it can be 1.3, 1.5, 1.8, 1.9, 2.0 and so on. When the excess air ratio is between 1.3 and 2.0, the combustion temperature of the second combustion assembly 120 can be reduced, and the amount of nitrogen oxides generated can be reduced.

It should be noted that the above-mentioned excess air coefficient of the gas entering the second combustion assembly 120 is 1.3-2.0 is only an example, and does not limit the second combustion assembly 120 of the present application to only the above-mentioned excess air coefficient.

The burner 100 provided by the embodiments of the present application has at least the following advantages:

After the mixed gas is burned in the porous medium combustion layer 112, it has the advantages of good combustion stability, good gas adaptability, uniform heat dissipation, low nitrogen oxides in the flue gas, and less flame; the flue gas after the combustion of the porous medium combustion layer 112 contains Fully combusted gas, the gas is guided downward by the casing 140 to the area where the second combustion assembly 120 is located, the raw gas in the combustion area of the second combustion assembly 120 is fuel gas and a combustion-supporting gas, and the aforementioned insufficiently combusted gas is burned more in this combustion area. sufficient, so that the burner 100 has the advantages of sufficient combustion and uniform heat dissipation; in the combustion area of the second combustion assembly 120, the flue gas in the first combustion area is reheated, and local high pressure is formed due to the increase in air temperature, so that the outer casing 140 The flue gas inside is entrained and mixed in the combustion area of the second combustion component 120 , and the combustion is completed and the released flame is reduced, so that it has the characteristics of no flame or less flame.

For the embodiment in which the cross-sectional area of the perforated plate 113 provided in the first combustion assembly 110 is smaller than the cross-sectional area of the mixed gas delivery pipe 130, after the gas enters the inside of the perforated plate 113 from the mixed gas delivery pipe 130, the pressure increases, which can The mixed gas flow rate of the gas entering each hole of the porous plate 113 is kept consistent; thus, the heat radiated from each part of the porous medium combustion layer 112 is more uniform.

For the embodiment in which the hole diameter of the porous plate 113 is less than or equal to 1.2 mm, the porous plate 113 has the effect of preventing tempering.

The present application also provides a combustion device, which includes an air supply assembly and the above-mentioned burner 100 connected to the air supply assembly.

The gas supply assembly is used to provide the gas required by the burner 100, such as auxiliary gas, fuel gas and mixed gas; in addition, the gas supply assembly can also be configured with a detector for detecting gas pressure or flow, such as a pressure sensor, a flow meter, etc. .

The combustion device provided by the present application has all the advantages of the above-mentioned burner 100 .

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (10)

1. A burner, characterized in that the burner comprises: shell; Mixed gas delivery pipe; the mixed gas delivery pipe is used to deliver the mixed gas of fuel gas and auxiliary gas; a first combustion component; the first combustion component includes a porous medium combustion layer, the porous medium combustion layer is located in the outer casing, and the porous medium combustion layer is communicated with the mixed gas delivery pipe; a gas delivery pipe; the gas delivery pipe is used for delivering gas; A combustion-assistant gas delivery pipe; the combustion-assistant gas delivery pipe is used to deliver a combustion-assistant gas; and the second combustion assembly; the second combustion assembly is located in the casing; the auxiliary gas delivery pipe and the gas delivery pipe are both connected with the second combustion assembly; the second combustion assembly is located in the porous medium Below the combustion layer, the flue gas of the porous medium combustion layer can flow through the second combustion component. 2. The burner of claim 1, wherein The first combustion assembly further includes a porous plate, one end of the porous plate is communicated with the mixed gas delivery pipe, and the other end is communicated with the porous medium combustion layer. 3 . The burner according to claim 2 , wherein the porous plate has a cross section along a direction perpendicular to the conveying direction of the mixed gas, and the sum of the area of the holes in the cross section is smaller than the cross-sectional area of the mixed gas conveying pipe. 4 . . 4 . The burner according to claim 2 , wherein the first combustion assembly further comprises a thermal insulation shell, and the porous plate and the porous medium combustion layer are both located in the thermal insulation shell. 5 . 5. The burner according to claim 2, wherein the aperture of the porous plate is less than or equal to 1.2 mm. 6. The burner according to any one of claims 1-5, characterized in that, The burner further includes an air mixing chamber connected to the outer casing, the mixed air conveying pipe and the porous medium combustion layer are all communicated with the air mixing chamber; an air distribution plate is arranged in the air mixing chamber. 7. The burner according to any one of claims 1-5, characterized in that, the auxiliary gas delivery pipe is sleeved outside the gas delivery pipe; The porous medium combustion layer surrounds the gas-supporting gas conveying pipe. 8. The burner according to any one of claims 1-5, wherein the gas delivery pipe is sleeved outside the auxiliary gas delivery pipe; The porous medium combustion layer surrounds the gas delivery pipe. 9. The burner according to any one of claims 1-5, characterized in that, The burner further includes a sleeve; the second combustion assembly includes a gas nozzle and a swirl sheet; the swirl sheet is arranged at the outlet of the gas delivery pipe, the gas delivery pipe, the auxiliary gas delivery The pipes are all connected with gas nozzles; the gas nozzles are located in the sleeve. 10. A combustion device, characterized in that, the combustion device comprises an air supply assembly and the burner according to any one of claims 1-9 connected to the air supply assembly.

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