Flame-catalysis integrated burner

Abstract

The utility model discloses a flame-catalysis integrated combustor, which solves the problem that catalytic combustion and flame combustion are not integrated in the prior art, and has the beneficial effects of realizing integrated combustion and improving combustion efficiency, and the specific scheme is as follows: the flame-catalysis integrated combustor comprises a shell, one side of the shell is provided with an air inlet, and the other side of the shell is provided with an air outlet; a fuel-air mixer, a flame tube and a catalytic component are sequentially arranged in the shell from one side of the air inlet to the other side of the shell, the fuel-air mixer comprises a plurality of fuel distribution chambers which are sequentially arranged in a nested mode, and a gas circulation channel is formed between every two adjacent fuel distribution chambers; the fuel distribution chambers are provided with fuel spray holes facing the gas circulation channel, the outlet end of the fuel-air mixer is inserted into the flame tube, the flame tube comprises a shell, the shell and the shell are arranged at an interval, and the catalytic component is fixed to the end, away from the fuel-air mixer, of the shell of the flame tube.

Description

Technical Field

[0001] This utility model relates to the field of burner technology, and in particular to a flame-catalytic integrated burner. Background Technology

[0002] The statements in this section are merely background information related to this utility model and do not necessarily constitute prior art.

[0003] Existing burners include catalytic combustion burners and flame combustion burners. These two types of burners are usually set up independently, without integration of catalytic combustion and flame combustion. Although some existing technologies integrate the two, they only place the catalytic burner separately after the flame burner. The inventors have discovered that the integration methods of existing technologies have the following problems:

[0004] Simply combining a catalytic burner and a flame burner results in a relatively complex overall structure. Separate catalytic burners and flame burners cannot guarantee the temperature of the catalytic burner, and heating of the catalytic burner is also required, further complicating the structure.

[0005] In the existing technology, the catalytic burner and the flame burner are only connected separately and are not integrated into a single device, resulting in a large overall structural footprint.

[0006] Flame burners that are not combined with catalytic combustion have the problem of large exhaust emissions. Utility Model Content

[0007] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a flame-catalytic integrated burner that can achieve both flexible flame combustion and catalytic combustion modes.

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0009] A flame-catalytic integrated burner includes a housing with an air inlet on one side. From the air inlet to the other side of the housing, a fuel-air mixer, a flame tube, and a catalytic component are sequentially arranged inside the housing. The fuel-air mixer includes multiple fuel distribution chambers nested in sequence, with a gas flow channel formed between adjacent chambers. Each fuel distribution chamber has a fuel nozzle facing the gas flow channel. The fuel-air mixer mixes air with one or more fuels. The outlet end of the fuel-air mixer is inserted into the flame tube. The flame tube includes a housing with a gap between the housings. The catalytic component is fixed to the end of the flame tube housing away from the fuel-air mixer, and the housing passes through the housing, enabling flame combustion of fuel in the flame tube and / or catalytic combustion at the catalytic component.

[0010] In the flame-catalytic integrated burner described above, the air inlet is located at one end of the housing. The inner diameter of the housing at the air inlet is smaller than the inner diameter of the housing at the fuel distribution chamber. The increase in the inner diameter of the housing is beneficial for accelerating the air.

[0011] As described above, in order to support the internal components, a fixed support is provided inside the housing to support the fuel distribution chamber, and a movable support is provided inside the housing to support the flame tube.

[0012] Both the fixed and movable support components are hollowed out to allow air to enter between the housing and the outer shell.

[0013] As described above, in a flame-catalytic integrated burner, the fuel-air mixer includes a first fuel distribution chamber, which is an annular component with a hollow interior. A second fuel distribution chamber is nested inside the first fuel distribution chamber, and a gas flow channel is formed between the two fuel distribution chambers. A swirl vane is provided between the two distribution chambers to accelerate the air flow. The distance between the swirl vane and the air inlet is smaller than the distance between the fuel nozzle and the air inlet.

[0014] The inner surface of the first fuel distribution chamber is provided with a first fuel injection hole on the side near the flame tube, and the outer surface of the second fuel distribution chamber is provided with a second fuel injection hole on the side near the flame tube, so that the fuel is injected into the gas flow channel to facilitate the premixing of fuel and air.

[0015] As described above, in a flame-catalytic integrated burner, a first fuel inlet pipe is provided on the outer side of the first fuel distribution chamber, and the first fuel inlet pipe passes through the outer casing;

[0016] One end of the second fuel distribution chamber extends beyond the first fuel distribution chamber. A second fuel inlet pipe is provided outside the second fuel distribution chamber and passes through the outer shell.

[0017] The first fuel inlet pipe and the second fuel inlet pipe are positioned opposite each other, so that the first fuel inlet pipe and the second fuel inlet pipe are arranged in a reasonable manner and will not interfere with each other.

[0018] In the flame-catalytic integrated burner described above, the second fuel distribution chamber is an internally hollow annular component, and an air circulation channel is formed on the inner side of the second fuel distribution chamber.

[0019] The second fuel distribution chamber has a protrusion at one end near the flame tube. The protrusion is funnel-shaped. The inner wall of the second fuel distribution chamber extends beyond the outer wall in the direction towards the flame tube. There is a distance between the protruding inner wall of the second fuel distribution chamber and the inner surface of the protrusion. A first hole is provided at the end of the protruding inner wall of the second fuel distribution chamber, and a second hole is provided on the protrusion. The inner diameter of the first hole is larger than the inner diameter of the second hole to cool the second fuel distribution chamber. The funnel-shaped protrusion also facilitates the acceleration of the gas mixture.

[0020] As described above, a flame-catalytic integrated burner includes a front end plate with openings for mounting the fuel-air mixer. The front end plate is connected to a first annular plate, which is connected to a second annular plate. The second, third, and fourth annular plates are sequentially overlapped, forming gaps at the overlaps. A fifth annular plate is disposed inside the first and second annular plates, forming gaps with the first and second annular plates respectively. Some annular plates have cooling holes on the outside of the gaps. Air enters through the cooling holes and exits through the gaps, forming an air film on the inner wall of the outer annular plate, thereby separating the outer annular plate from the high-temperature combustion gas inside the flame tube and further cooling the outer annular plate.

[0021] The third annular plate is provided with mixing holes to allow air to enter the flame tube and mix with the high-temperature gas, reducing its temperature to a suitable range. To ensure combustion effect, the distance between the mixing holes and the fuel-air mixer is less than the distance between the ignition component and the fuel-air mixer.

[0022] As described above, in a flame-catalytic integrated burner, the housing further includes a sixth annular plate, one end of which is detachably mounted to the outside of the fourth annular plate, and the sixth annular plate is tapered at a section away from the fourth annular plate, with the catalytic component fixed to the inside of the sixth annular plate.

[0023] An ignition component is provided at the flame tube, passing through the outer shell and the housing, to ignite the fuel in the flame tube.

[0024] In the flame-catalytic integrated burner described above, the catalytic component is a porous medium;

[0025] A limiting platform is provided on one side of the sixth annular plate to limit one end of the catalytic component, and the other end of the catalytic component is limited by the fourth annular plate.

[0026] The beneficial effects of this utility model are as follows:

[0027] 1) The burner structure of this utility model is reasonably set, realizing the integration of the flame tube and the catalytic component. The fuel-air mixer can not only realize the injection of fuel, but also premix it with air. The gas formed after mixing enters the flame tube for flame combustion, and / or flows through the flame tube to the catalytic component for catalytic combustion. Different combustion forms can be selected according to the characteristics of specific fuels to meet the combustion requirements of fuels with different calorific values.

[0028] 2) This utility model places the catalytic component at the tail end of the flame tube, which simplifies the integrated burner structure and allows for reasonable control of space occupation. Some unburned combustible gases can further react when passing through the catalytic component, thereby reducing emissions. If the fuel only undergoes catalytic combustion, the fuel and air can be fully mixed through the fuel-air mixer and the flame tube, which is beneficial for the subsequent catalytic combustion reaction. Moreover, with the flame tube located at the front, the heat generated by the flame combustion in the flame tube can directly heat the catalytic component while ensuring a simple structural design, which is conducive to the smooth progress of catalytic combustion.

[0029] 3) In this utility model, the fuel distribution chamber is supported by a fixed support member, and a movable support member is provided inside the outer shell to support the flame tube. The movable support member is movable relative to the flame tube to support the flame tube according to a suitable position.

[0030] 4) The structure of the fuel-air mixer of this utility model is reasonable, including fuel distribution chambers nested in sequence, and a gas flow channel is formed between the two fuel distribution chambers, so that the fuel and air are mixed at the gas flow channel and then enter the flame tube.

[0031] 5) In this utility model, a protrusion is provided at one end of the second fuel distribution chamber near the flame tube. A first hole is provided at the end of the protruding inner wall of the second fuel distribution chamber, and a second hole is provided on the protrusion. The inner diameter of the first hole is larger than the inner diameter of the second hole to cool the second fuel distribution chamber, and the trumpet-shaped protrusion is also conducive to the acceleration of the mixed gas.

[0032] 6) In this utility model, the shell includes multiple annular plates. Air enters through cooling holes and is ejected from the gaps, thereby forming an air film on the inner wall of the outer annular plate, which separates the outer annular plate from the high-temperature gas inside the flame tube and further cools the outer annular plate. Attached Figure Description

[0033] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0034] Figure 1This is a schematic diagram of a flame-catalytic integrated burner according to one or more embodiments of the present invention.

[0035] Figure 2 This is a schematic diagram of the internal structure of a flame-catalytic integrated burner according to one or more embodiments of the present invention.

[0036] Figure 3 This is a schematic diagram of the internal structure of the fuel-air mixer in a flame-catalytic integrated burner according to one or more embodiments of the present invention.

[0037] Figure 4 This is a schematic diagram of the internal structure of the flame tube shell in a flame-catalytic integrated burner according to one or more embodiments of the present invention.

[0038] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0039] The components are: 1. Inlet flange, 2. Inlet bellows, 3. First fuel inlet pipe, 4. Intermediate flange, 5. Outlet bellows, 6. Outlet flange, 7. Second fuel inlet pipe, 8. First spark plug seat, 9. Outlet temperature sensor, 10. Fuel-air mixer, 11. Housing, 12. Flame tube, 13. Baffle, 14. Fixed support, 15. Movable support, 16. Second spark plug seat;

[0040] 1001. Second fuel distribution chamber; 1002. First fuel distribution chamber; 1003. First fuel nozzle; 1004. Swirl blade; 1005. Second fuel nozzle; 1006. Protrusion; 1007. Air circulation channel; 1008. First hole; 1009. Second hole;

[0041] 1201. Front end plate; 1202. First annular plate; 1203. Fifth annular plate; 1204. Second annular plate; 1205. Third annular plate; 1206. Fourth annular plate; 1207. Cooling hole; 1208. Positioning pin; 1209. First mixing hole; 1210. Second mixing hole; 1211. Catalytic component; 1212. Sixth annular plate; 1213. Cylindrical section. Detailed Implementation

[0042] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0043] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, unless otherwise expressly indicated by the present invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0044] As described in the background section, existing burners do not integrate flame combustion and catalytic combustion. To address this technical problem, this invention proposes a flame-catalytic integrated burner.

[0045] Example 1

[0046] In a typical embodiment of this utility model, refer to Figure 1 As shown, a flame-catalytic integrated burner includes a housing 11. An air inlet is provided on one side of the housing. From one side of the air inlet to the other side of the housing, a fuel-air mixer 10, a flame tube 12, and a catalytic component are sequentially arranged inside the housing. The fuel-air mixer 10 includes multiple fuel distribution chambers arranged in a nested manner. A gas flow channel is formed between two adjacent fuel distribution chambers. Each fuel distribution chamber is provided with a fuel nozzle facing the gas flow channel. The fuel-air mixer mixes air with one or more fuels. The outlet end of the fuel-air mixer is inserted into the flame tube. The flame tube includes a housing. The housings are spaced apart. The catalytic component is fixed to the end of the flame tube housing away from the fuel-air mixer. The housing passes through the housing, enabling the fuel to undergo flame combustion in the flame tube and / or catalytic combustion at the catalytic component.

[0047] Specifically, refer to Figure 2 As shown, the air intake is located at one end of the housing. The air intake includes an inlet bellows 2 connected to the housing. An inlet flange 1 is provided at the end of the inlet bellows 2 away from the housing 11. The inner diameter of the housing at the air intake is smaller than the inner diameter of the housing at the fuel distribution chamber. The increase in the inner diameter of the housing is beneficial for accelerating the air. The air intake is positioned opposite to the housing outlet. The central axes of the air intake, the housing outlet, the housing, and the fuel-air mixer are all located on the same straight line.

[0048] Understandably, in order to support the internal components, a fixed support is provided inside the outer shell 11 to support the fuel distribution chamber, and a movable support is provided inside the outer shell to support the flame tube; both the fixed support and the movable support are hollowed out so that air can enter between the outer shell and the outer shell.

[0049] Specifically, the fixed support 14 includes an annular ring fixed to the inner surface of the outer shell. The inner surface of the annular ring is provided with legs at intervals of a set angle to support the fuel-air mixer. A space is formed between two adjacent legs to allow air to enter the space between the outer shell and the outer shell. The movable support 15 is specifically an annular support plate, which can be set on the outside of the fourth annular plate of the outer shell. The annular support plate has multiple flow holes. By setting the fixed support and the movable support, the distance between the flame tube and the outer shell 11 is set to avoid the outer shell temperature from being too high.

[0050] In this embodiment, reference Figure 3 As shown, the fuel-air mixer includes a first fuel distribution chamber, which is a hollow annular component, i.e., a first fuel distribution cavity 1002 is formed inside the first fuel distribution chamber. A second fuel distribution chamber is nested inside the first fuel distribution chamber, and a gas flow channel is formed between the two fuel distribution chambers. A swirl vane is provided between the two distribution chambers to accelerate the air flow. The distance between the swirl vane and the air inlet is smaller than the distance between the fuel injection hole and the air inlet.

[0051] Specifically, multiple swirl blades are arranged around the outer side of the second fuel distribution chamber. From the third fuel distribution chamber to the second fuel distribution chamber, the width of the swirl blades gradually increases, and the swirl blades are inclined relative to the central axis of the second fuel distribution chamber.

[0052] The inner surface of the first fuel distribution chamber has multiple first fuel nozzles 1003 on the side near the flame tube, with an angle set between adjacent first fuel nozzles 1003. The outer surface of the second fuel distribution chamber has multiple second fuel nozzles 1005 on the side near the flame tube, with an angle set between adjacent second fuel nozzles. This ensures that the fuel is injected into the gas flow channel to facilitate the premixing of fuel and air. Furthermore, the second fuel nozzles are located between the swirl vanes and the first fuel nozzles.

[0053] It is easy to understand that a first fuel inlet pipe is installed on the outside of the first fuel distribution room, and the first fuel inlet pipe passes through the outer casing;

[0054] The outer diameter of the second fuel distribution chamber is smaller than the inner diameter of the first fuel distribution chamber. One end of the second fuel distribution chamber extends beyond the first fuel distribution chamber. A second fuel inlet pipe is installed outside the second fuel distribution chamber and passes through the outer shell. The first fuel inlet pipe and the second fuel inlet pipe are arranged opposite each other, so that the first fuel inlet pipe and the second fuel inlet pipe are reasonably arranged and will not interfere with each other. Moreover, since the outer diameter of the first fuel distribution chamber is larger than the outer diameter of the second fuel distribution chamber, the inner diameter of the first fuel inlet pipe 3 is naturally larger than the inner diameter of the second fuel inlet pipe 7.

[0055] It is easy to understand that the second fuel distribution chamber is a hollow annular part, that is, the inner surface of the second fuel distribution chamber forms the second fuel distribution cavity 1001, and the inner side of the second fuel distribution chamber forms the air circulation channel 1007.

[0056] A protrusion 1006 is provided at one end of the second fuel distribution chamber near the flame tube. The protrusion is funnel-shaped and extends beyond the outer wall of the second fuel distribution chamber in the direction towards the flame tube. There is a gap between the inner wall of the protruding second fuel distribution chamber and the inner surface of the protrusion. A first hole 1008 is provided at the end of the inner wall of the protruding second fuel distribution chamber, and a second hole 1009 is provided on the protrusion. The inner diameter of the first hole is larger than the inner diameter of the second hole to cool the second fuel distribution chamber. The funnel-shaped protrusion also facilitates the acceleration of the gas mixture. The outer diameter of the protrusion on the side near the flame tube is larger than the outer diameter on the other side. The end face of the protrusion can be flush with the end face of the first fuel distribution chamber near the flame tube. The maximum outer diameter of the protrusion is smaller than the inner diameter of the first fuel distribution chamber.

[0057] refer to Figure 4 As shown, the housing includes a front end plate 1201 with an opening for mounting a fuel-air mixer. The front end plate 1201 is connected to a first annular plate 1202, and the first annular plate is connected to a second annular plate 1204. One side of a third annular plate 1205 overlaps and is fixed to the outside of the second annular plate 1204, and a fourth annular plate 1206 overlaps and is fixed to the outside of the third annular plate 1205. Thus, a gap is formed between the third annular plate and the second annular plate, and a gap is also formed between the fourth annular plate and the third annular plate.

[0058] A fifth annular plate 1203 is provided inside the first annular plate 1202 and the second annular plate 1204. The middle section of the fifth annular plate is fixedly connected to the connection between the first annular plate 1202 and the second annular plate 1204. The two sides of the fifth annular plate form gaps with the first annular plate and the second annular plate, respectively. Cooling holes 1207 are provided on the outer side of the corresponding gaps of the first annular plate 1202, the second annular plate 1204, the third annular plate 1205, and the fourth annular plate 1206. Air enters through the cooling holes 1207 and is ejected from the gaps, forming an air film on the inner wall of the outer annular plate. This separates the outer annular plate from the high-temperature gas inside the flame tube, further cooling the outer annular plate. The multiple gaps create a multi-layer cooling structure on the inner wall of the flame tube, effectively cooling the shell of the flame tube.

[0059] To maintain the spacing of the gaps, positioning pins 1208 are provided on the outer surface of the annular plate inside each gap. A positioning pin is provided at a set distance on the outer surface of each annular plate, and the positioning pin is in contact with the outer annular plate.

[0060] In addition, the third annular plate is provided with mixing holes to allow air to enter the flame tube and mix with the high-temperature gas, reducing its temperature to a suitable range. To ensure combustion effect, the distance between the mixing holes and the fuel-air mixer is less than the distance between the ignition component and the fuel-air mixer.

[0061] Specifically, the mixing holes include a first mixing hole 1209 and a second mixing hole 1210. The inner diameter of the first mixing hole 1209 is larger than the inner diameter of the second mixing hole. The first mixing hole and the second mixing hole are arranged in a ring around the third annular plate. The first mixing hole and the second mixing hole are spaced at an angle between adjacent first mixing holes and adjacent second mixing holes. Moreover, the first mixing hole 1209 and the second mixing hole 1210 are staggered to introduce excess air into the flame tube to mix the high-temperature gas and reduce its temperature to a suitable range.

[0062] It should be noted that the housing also includes a sixth annular plate 1212. One end of the sixth annular plate is detachably mounted on the outside of the fourth annular plate. The sixth annular plate is tapered at a section away from the fourth annular plate, and a cylindrical section 1213 is provided at the end away from the fourth annular plate. A step is formed on the outside of the cylindrical section to limit the baffle 13. A catalyst component 1211 is provided on the inner side of the sixth annular plate. A limiting platform is provided on one side of the inner side of the sixth annular plate to limit one end of the catalyst component. The other end of the catalyst component is limited by the fourth annular plate, thus fixing the catalyst component in a defined position.

[0063] Furthermore, a connecting section is provided at the opening in the middle of the baffle to connect with the outlet bellows 5, an outlet flange 6 is provided at the end of the outlet bellows, and an outlet temperature sensor 9 is provided at the outlet bellows to obtain the temperature of the gas at the outlet bellows.

[0064] The outer shell has a half-middle flange 4 on one side, and the other half of the middle flange is fixed to the periphery of the baffle. The two middle flanges can be connected. By removing the bolts at the middle flange, the middle flange 4 can be separated. The baffle 13 can be removed, and the sixth annular plate 1212 and the catalyst component 1211 can be taken off together for replacement, cleaning and maintenance, or simply removed for use in flame combustion mode.

[0065] It is easy to understand that an ignition component is provided at the flame tube. The ignition component passes through the outer shell and housing to ignite the fuel in the flame tube. The ignition component is a spark plug, which is installed through a spark plug seat. The first spark plug seat 8 is installed at the outer shell, and the spark plug here passes through the outer shell and housing into the flame tube. The ignition component can ignite the fuel in the combustion tube. In addition, a second spark plug seat 16 is provided. The second spark plug seat 16 is located on the end face of the outer shell, so that the spark plug here passes through the fuel-air premixer head and is placed behind the swirl vanes.

[0066] In this embodiment, the catalytic component is a porous medium 1211. The porous medium can be made of ceramic material or other high-temperature resistant material. The porous medium is used to set the fuel combustion catalyst. The porous medium has pores. After the air and fuel mixture flows through the flame tube, it enters the catalytic component and the catalytic combustion reaction takes place on the fine surface of the porous medium.

[0067] Thus, air enters the burner through the inlet flange 1. A portion of the air, originating from the fuel-air mixer 10, undergoes swirling velocity generated by the swirl vanes, mixes with the fuel, and then enters the flame tube 12 for combustion. The first fuel enters the first fuel distribution chamber 1002, is ejected through the first fuel nozzle 1003, mixes with the air that has undergone swirling velocity after passing through the swirl vanes 1004, and then enters the subsequent flame tube 12 for combustion. The second fuel enters the second fuel distribution chamber 1001, is ejected through the second fuel nozzle 1005, mixes with the air that has undergone swirling velocity after passing through the swirl vanes 1004, and then enters the subsequent flame tube 12 for combustion. A portion of the air passes through the space between the outer casing 11 and the flame tube 12, entering the flame tube 12 through mixing holes on the flame tube wall for wall cooling and mixing with the high-temperature combustion gas, thus lowering its temperature to a suitable range.

[0068] The rear half of the casing houses the catalytic unit. When the flame in front is burning normally, the fuel gas, cooled by the cold air flowing through the mixing holes, enters the catalytic unit for further catalytic treatment, further reacting any unburned combustible gases and reducing emissions. If combustion does not occur in the front flame, or if the fuel's calorific value is too low to stabilize the flame, the structures in front of the fuel-air mixer 10 and the flame tube 12 serve as fuel-air mixing structures, performing two-stage mixing to achieve a highly uniform mixture before entering the catalytic combustion section for catalytic reaction.

[0069] A method for operating a flame-catalytic integrated burner includes the following:

[0070] Air enters the housing through the air inlet;

[0071] One or more fuels enter their respective fuel distribution chambers and are ejected through fuel nozzles. The ejected fuels are premixed with air in the gas flow channel and then enter the flame tube for combustion.

[0072] And / or, fuel and air are premixed in a fuel-air mixer before entering the flame tube housing and then proceeding to the catalytic unit for catalytic combustion.

[0073] It is easy to understand that catalytic combustion requires the intake air temperature to reach the set temperature before the catalytic reaction can occur. Under normal circumstances, it is necessary to start the flame combustion first, preheat the entire burner to the set temperature, and then switch to catalytic combustion mode.

[0074] Thus, the method provided in this embodiment can use dual fuels, selecting different combustion modes based on the composition of different fuels and the fuel-air ratio. When the fuel has a high calorific value and a large flow rate, flame combustion is used, and the subsequent catalytic component can serve as an aftertreatment structure. When the fuel has a low calorific value or the fuel flow rate is relatively low compared to the air flow rate, catalytic combustion mode is used, which can carry out catalytic combustion at a relatively low temperature.

[0075] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A flame-catalytic integrated burner, characterized in that, The device includes an outer casing with an air inlet on one side. From the air inlet to the other side of the casing, a fuel-air mixer, a flame tube, and a catalytic component are sequentially arranged inside the casing. The fuel-air mixer includes multiple fuel distribution chambers nested in sequence, with a gas flow channel formed between adjacent fuel distribution chambers. Each fuel distribution chamber has a fuel nozzle facing the gas flow channel. The fuel-air mixer mixes air with one or more fuels. The outlet end of the fuel-air mixer is inserted into the flame tube. The flame tube includes a housing with a gap between the housings. The catalytic component is fixed to the end of the flame tube housing away from the fuel-air mixer. The housing passes through the outer casing, enabling flame combustion of fuel in the flame tube and / or catalytic combustion at the catalytic component.

2. The flame-catalytic integrated burner according to claim 1, characterized in that, The air inlet is located at one end of the housing, and the inner diameter of the housing at the air inlet is smaller than the inner diameter of the housing at the fuel distribution chamber.

3. The flame-catalytic integrated burner according to claim 1, characterized in that, A fixed support is provided inside the outer shell to support the fuel distribution chamber, and a movable support is provided inside the outer shell to support the flame tube. Both the fixed and movable support components are hollowed out to allow air to enter between the housing and the outer shell.

4. The flame-catalytic integrated burner according to claim 1, characterized in that, The fuel-air mixer includes a first fuel distribution chamber, which is a hollow annular component. A second fuel distribution chamber is nested inside the first fuel distribution chamber. A gas flow channel is formed between the two fuel distribution chambers. A swirl vane is provided between the two distribution chambers to accelerate the air flow. The distance between the swirl vane and the air inlet is smaller than the distance between the fuel injection hole and the air inlet. The inner surface of the first fuel distribution chamber is provided with a first fuel injection hole on the side near the flame tube, and the outer surface of the second fuel distribution chamber is provided with a second fuel injection hole on the side near the flame tube.

5. A flame-catalytic integrated burner according to claim 4, characterized in that, A first fuel inlet pipe is provided outside the first fuel distribution room, and the first fuel inlet pipe passes through the outer casing. One end of the second fuel distribution chamber extends beyond the first fuel distribution chamber. A second fuel inlet pipe is provided outside the second fuel distribution chamber and passes through the outer shell. The first fuel inlet pipe and the second fuel inlet pipe are positioned opposite each other.

6. The flame-catalytic integrated burner according to claim 4, characterized in that, The second fuel distribution chamber is a hollow annular component, and an air circulation channel is formed on the inner side of the second fuel distribution chamber. The second fuel distribution chamber has a protrusion at one end near the flame tube. The protrusion is funnel-shaped. The inner wall of the second fuel distribution chamber extends beyond the outer wall in the direction towards the flame tube. There is a distance between the protruding inner wall of the second fuel distribution chamber and the inner surface of the protrusion. A first hole is provided at the end of the protruding inner wall of the second fuel distribution chamber, and a second hole is provided on the protrusion. The inner diameter of the first hole is larger than the inner diameter of the second hole to cool the second fuel distribution chamber.

7. The flame-catalytic integrated burner according to claim 1, characterized in that, The housing includes a front end plate with an opening for mounting the fuel-air mixer. The front end plate is connected to a first annular plate, and the first annular plate is connected to a second annular plate. The second annular plate, the third annular plate, and the fourth annular plate are sequentially overlapped, forming a gap at the overlap. The third annular plate is provided with mixing holes to allow air to enter the flame tube and mix with the high-temperature gas.

8. A flame-catalytic integrated burner according to claim 7, characterized in that, A fifth annular plate is provided inside the first and second annular plates. The fifth annular plate forms gaps with the first and second annular plates respectively. Cooling holes are provided on the outside of some annular plates. Air enters through the cooling holes and is ejected from the gaps, thus forming an air film on the inner wall of the outer annular plate.

9. A flame-catalytic integrated burner according to claim 7, characterized in that, The housing also includes a sixth annular plate, one end of which is detachably mounted to the outside of the fourth annular plate. The sixth annular plate has a reduced diameter at a section away from the fourth annular plate, and the catalytic component is fixed inside the sixth annular plate. An ignition component is provided at the flame tube, and the ignition component passes through the outer shell and the housing.

10. A flame-catalytic integrated burner according to claim 9, characterized in that, The catalytic component is a porous medium; A limiting platform is provided on one side of the sixth annular plate to limit one end of the catalytic component, and the other end of the catalytic component is limited by the fourth annular plate.

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