Catalytic-flame integrated burner and working method thereof

Abstract

The invention discloses a catalysis-flame integrated combustor and a working method thereof, solves the problem that in the prior art, catalytic combustion and flame combustion cannot be integrated, and has the beneficial effects that catalytic combustion and flame combustion are integrated, and a catalytic combustion section is prevented from being burnt by flame. Comprising a shell, an air inlet is formed in one side of the shell, a first premixing part, a catalytic combustion section, a second premixing part and a combustion cylinder are sequentially arranged in the shell, the catalytic combustion section and the first premixing part are arranged at an interval, and the first premixing part achieves premixing of first fuel and air; the second premixing part and the catalytic combustion section are arranged at an interval, gas flowing out of the catalytic combustion section enters the combustion cylinder through the second premixing part, the second premixing part achieves premixing of second fuel and / or third fuel and air, and the outlet end of the second premixing part is connected with the inlet end of the combustion cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of burners, in particular to a catalytic-flame integrated burner and a working method thereof. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] The existing burners include catalytic combustion burners and flame combustion burners. The two burners are usually set independently without integrating catalytic combustion and flame combustion. For the combustion of some fuels, there is no integrated burner, so two burners need to be set, one for catalytic combustion reaction and the other for flame combustion reaction, resulting in the burner occupying a large space and the space utilization rate needs to be improved;

[0004] In addition, if the catalytic burner is simply combined with the flame burner, the high temperature of the flame burner may burn the catalytic medium and damage the catalyst, thus affecting the effect of the catalytic combustion. Summary of the invention

[0005] In view of the deficiencies in the prior art, the object of the present invention is to provide a catalytic-flame integrated burner that can achieve catalytic combustion first and flame combustion later to meet the combustion requirements of fuels with different calorific values.

[0006] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0007] A catalytic-flame integrated burner comprises a shell, an air inlet is arranged on one side of the shell, a first premixing component, a catalytic combustion section, a second premixing component and a combustion tube are arranged in sequence in the shell, the catalytic combustion section and the first premixing component are spaced apart from each other, the first premixing component realizes premixing of a first fuel and air, the second premixing component and the catalytic combustion section are spaced apart from each other, the gas flowing out of the catalytic combustion section enters the combustion tube through the second premixing component, the second premixing component realizes premixing of a second fuel and / or a third fuel and air, the outlet end of the second premixing component is connected to the inlet end of the combustion tube, so that the fuel is catalytically burned by a reaction in the catalytic combustion section or flamed in the combustion tube.

[0008] A catalytic-flame integrated burner as described above, wherein the shell includes a first shell and a second shell, the first shell and the second shell are detachably connected, the first shell is provided with the first premixing component and the catalytic combustion section, the second shell is provided with the second premixing component and the combustion tube, the tail end of the combustion tube passes through the second shell, and the first shell and the second shell are detachably provided, so as to facilitate the catalytic combustion section to be provided in the first shell.

[0009] In the catalytic-flame integrated burner as described above, the catalytic combustion section is removable relative to the first shell, so that the catalytic combustion section can be replaced or removed;

[0010] A limiting member is provided in the first shell to limit one end of the catalytic combustion section, and an annular support plate is provided at one end of the second shell to limit the other end of the catalytic combustion section;

[0011] The air inlet is arranged at one end of the first shell away from the second shell, so that air can enter the second shell after passing through the first premixing component and the catalytic combustion section.

[0012] As described above, in a catalytic-flame integrated burner, the first premixing component includes a first baffle and a second baffle arranged along the radial direction of the shell, the first baffle and the second baffle are spaced apart to form a first space, both baffles are hollowed out, a premixing tube is arranged at the hollowed-out parts of the two baffles, air can enter the premixing tube, the first shell is provided with a first fuel inlet pipe connected to the first space, a first fuel nozzle hole is arranged on the side of the premixing tube so that the first fuel entering the first space enters the premixing tube through the first fuel nozzle hole, and the air and the first fuel are premixed in the premixing tube.

[0013] In the catalytic-flame integrated burner as described above, the catalytic combustion section is a porous medium having pores, and the first fuel and air flow through the porous medium to achieve catalytic combustion.

[0014] In a catalytic-flame integrated burner as described above, the second premixing component includes a second fuel distribution chamber, the second fuel distribution chamber is an annular member, a second fuel inlet pipe is arranged on the outer side of the second fuel distribution chamber, the second fuel inlet pipe passes through the shell, a plurality of second fuel nozzles are arranged on the inner side of the second fuel distribution chamber, the second fuel nozzles are arranged close to the combustion tube, and air flows through the inner side of the second fuel distribution chamber to be premixed with the fuel sprayed from the second fuel nozzles.

[0015] A catalytic-flame integrated burner as described above, wherein a third fuel distribution chamber is arranged inside the second fuel distribution chamber, a swirl vane is arranged between the third fuel distribution chamber and the second fuel distribution chamber, one end of the third fuel distribution chamber is arranged beyond the second fuel distribution chamber, a third fuel inlet pipe is arranged outside the third fuel distribution chamber, the third fuel inlet pipe passes through the shell, a third fuel spray hole is arranged outside the third fuel distribution chamber, the third fuel enters the third fuel distribution chamber, is sprayed from the third fuel spray hole and is premixed with the air outside the third fuel distribution chamber;

[0016] The third fuel distribution chamber is an annular part, and a protrusion is arranged on the outer wall of the third fuel distribution chamber close to one end of the combustion tube, and the inner wall of the third fuel distribution chamber is arranged beyond the outer wall. A first hole is arranged on one end of the third fuel distribution chamber close to the combustion tube, and a second hole is arranged on the protrusion, and the inner diameter of the first hole is greater than the inner diameter of the second hole.

[0017] A catalytic-flame integrated burner as described above, wherein the combustion tube comprises a plurality of annular members, two adjacent annular members are overlapped so that a gap connected to the combustion chamber inside the combustion tube is formed at the overlapped portion of the two adjacent annular members, the annular members are provided with cooling holes on the outside of the gap, air enters the gap from the cooling holes to form an air film on the inner wall of the annular members, and some combustion tubes are provided with mixing holes so that part of the air enters the combustion chamber;

[0018] An inner ring part is arranged on the inner side of the higher ring part, and gaps are also arranged on both sides of the inner ring part and between the higher ring part. The higher ring part is also provided with cooling holes on the outer side of the inner ring part. Air enters the gap through the cooling holes and is ejected from the sides of the gap, forming an air film on the inner wall surface of the outer ring part, separating the outer ring part from the high-temperature combustion gas inside the combustion tube.

[0019] The catalytic-flame integrated burner as described above further comprises an ignition component, the ignition component passes through the housing and enters the combustion tube, and the ignition component can ignite the fuel in the combustion tube;

[0020] A support member is arranged in the annular direction of the combustion tube to support the combustion tube in the shell. The support member is provided with a plurality of flow holes. Through the support member, a distance is arranged between the combustion tube and the shell to avoid excessive temperature of the shell.

[0021] In a second aspect, the present invention further discloses a working method of a catalytic-flame integrated burner, comprising the following contents:

[0022] Air enters the housing through the air inlet;

[0023] The first fuel enters the first premixing component, and after being premixed with air in the first premixing component, enters the catalytic combustion section for catalytic combustion;

[0024] Alternatively, the second fuel and / or the third fuel enters the second premixing component to be premixed with the air, and after the premixing, enters the combustion tube to be burned.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1) The burner of the present invention has a reasonable structure. Two premixing components are arranged in the shell. The first premixing component realizes the premixing of the first fuel and the air, and the second premixing component realizes the premixing of the second fuel and / or the third fuel and the air. The integration of catalytic combustion and flame combustion is realized as a whole, and the space utilization rate is improved. In this way, different combustion modes can be selected for different fuels, and flexible switching of the three fuels can be realized, making the whole burner more adaptable.

[0027] 2) The catalytic combustion section of the present invention is arranged closer to the air inlet than the combustion tube, so that the catalytic combustion is relatively close to the air inlet, which can effectively avoid the risk of the catalytic combustion section being burned by the flame and prevent the high temperature of the flame combustion from damaging the catalyst.

[0028] 3) In the present invention, the first shell and the second shell are detachably connected, and the catalytic combustion section can be removed relative to the first shell, so that the catalytic combustion section can be replaced or removed.

[0029] 4) The first premixing component in the present invention has a reasonable structure. The first fuel distribution chamber is formed by the first baffle, the second baffle and the premixing tube. The first fuel enters the premixing tube through the first fuel nozzle at the premixing tube, and the air and the first fuel are premixed in the premixing tube.

[0030] 5) The second premixing component in the present invention has a reasonable structure, which can realize the premixing of the second fuel and / or the third fuel with the air and ensure the premixing effect.

[0031] 6) The combustion tube structure of the present invention is reasonably arranged, and air is arranged at a distance between the combustion tube and the shell to perform preliminary cooling on the combustion tube; a gap is formed between two adjacent annular members, and a gap is also formed between the inner side of the longer outer annular member and the inner annular member, and cooling holes are arranged on the outer side of the gap. Air enters the gap from the cooling holes and forms an air film on the inner wall of the annular member, thereby isolating the outer annular member from the high-temperature combustion gas inside the combustion tube, and further cooling the outer annular member. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings in the specification, which constitute a part of the present invention, 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 improper limitations on the present invention.

[0033] Figure 1 is a schematic diagram of a catalytic-flame integrated burner according to one or more embodiments of the present invention.

[0034] Figure 2 is an internal cross-sectional view of a catalytic-flame integrated burner according to one or more embodiments of the present invention.

[0035] Figure 3It is an enlarged view of the first premixing component and the catalytic combustion section in a catalytic-flame integrated burner according to one or more embodiments of the present invention.

[0036] Figure 4 It is an enlarged view of a second premixing component in a catalytic-flame integrated combustor according to one or more embodiments of the present invention.

[0037] Figure 5 It is a schematic diagram of a combustion tube in a catalytic-flame integrated burner according to one or more embodiments of the present invention.

[0038] In the figure: the distances or sizes between parts are exaggerated to show the positions of various parts, and the schematic diagram is for reference only.

[0039] Wherein: 1. inlet flange, 2. first fuel inlet pipe, 3. middle flange, 4. second fuel inlet pipe, 5. third fuel inlet pipe, 6. spark plug seat, 7. bellows, 8. outlet flange, 9. temperature sensor, 10. first premixing component, 11. catalytic combustion section, 12. second premixing component, 13. housing, 14. combustion tube, 15. fixed support, 16. support member;

[0040] 1001. pipeline, 1002. first section, 1003. first baffle, 1004. second baffle, 1005. premixing tube, 1006. first fuel injection hole, 1007. first fuel distribution chamber;

[0041] 1101. second section, 1102. catalyst carrier, 1103. boss;

[0042] 1201. second fuel distribution chamber, 1202. third fuel distribution chamber, 1203. circulation channel, 1204. third fuel injection hole, 1205. swirl vane, 1206. second fuel injection hole, 1207. second hole, 1208. protrusion, 1209. first hole;

[0043] 1401. front end plate, 1402. first ring member, 1403. second ring member, 1404. inner ring member, 1405. third ring member, 1406. fourth ring member, 1407. fifth ring member, 1408. cooling hole, 1409. positioning pin, 1410. first mixing hole, 1411. second mixing hole. DETAILED DESCRIPTION

[0044] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0045] 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 invention. As used herein, unless otherwise explicitly stated in the present invention, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof;

[0046] As introduced in the background technology, the prior art has the problem that the catalytic combustion and the flame combustion of the burner are separately arranged. In order to solve the above technical problem, the present invention proposes a catalytic-flame integrated burner.

[0047] Embodiment 1

[0048] In a typical embodiment of the present invention, reference is made to Figure 1 As shown, a catalytic-flame integrated burner includes a shell, an air inlet is arranged on one side of the shell, a first premixing component, a catalytic combustion section, a second premixing component and a combustion tube are arranged in sequence in the shell, the catalytic combustion section and the first premixing component are set at a distance, the first premixing component realizes premixing of a first fuel and air, the second premixing component and the catalytic combustion section are set at a distance, the gas flowing out of the catalytic combustion section passes through the second premixing component and enters the combustion tube, the second premixing component realizes premixing of a second fuel and / or a third fuel with air, the outlet end of the second premixing component is connected to the inlet end of the combustion tube, so that the fuel is catalytically burned by a reaction in the catalytic combustion section or flame burned in the combustion tube.

[0049] Specifically, the shell includes a first shell and a second shell, the first shell is detachably connected to the second shell, a first premixing component and a catalytic combustion section are arranged in the first shell, a second premixing component and a combustion tube are arranged in the second shell, the tail end of the combustion tube is arranged through the second shell, the combustion tube passes through the tail end of the second shell and is connected to the outlet bellows 7, an outlet flange 8 is arranged at the end of the outlet bellows away from the combustion tube, the outlet bellows 7 and the outlet flange 8 are fixedly connected by screws, a temperature sensor 9 is arranged at the outlet bellows 7 to obtain the temperature of the gas at the outlet bellows, and the first shell and the second shell are detachably arranged, so as to facilitate the catalytic combustion section to be arranged in the first shell.

[0050] The catalytic combustion section 11 specifically selects a catalytic carrier 1102, which can be removed relative to the first shell to achieve replacement or removal of the catalytic combustion section; a limiting member is arranged in the first shell to limit one end of the catalytic carrier, and an annular support plate is arranged at one end of the second shell to limit the other end of the catalytic carrier.

[0051] refer to Figure 3As shown, the limiting member is a boss 1103 arranged on the inner wall of the first shell, and the boss can be arranged in a circle along the inner wall of the first shell. The boss 1103 and the annular support plate are arranged to prevent the catalytic combustion section from axial displacement.

[0052] Among them, the first shell and the second shell are both annular parts, the inner diameter of the first shell is smaller than the inner diameter of the second shell, the end of the first shell away from the air inlet is bent outward, and an intermediate flange 3 is arranged at this end, a connecting flange is arranged at one end of the second shell, and the intermediate flange 3 is connected to the connecting flange, the thickness of the catalytic carrier is adapted to the distance between the boss 1103 and the annular support plate, the annular support plate is flush with the end face of the connecting flange, and the annular support plate is arranged beyond the intermediate flange toward the central axis direction of the second shell.

[0053] In addition, the air inlet is arranged at one end of the first shell 1002 away from the second shell, and the first shell is provided with an inlet flange 1 at one end of the air inlet for connection with the air inlet pipe. The inner diameter of the first shell at the air inlet is smaller than the inner diameter of the first shell at the first premixing component and the catalytic combustion section, and the two sections of the first shell with different inner diameters are connected by a tapered section, and the air can enter the second shell after passing through the first premixing component and the catalytic combustion section.

[0054] It is easy to understand that before catalytic combustion, the first fuel and the air need to be fully mixed, and the first premixing component can achieve this function. The first premixing component 10 includes a first baffle 1003 and a second baffle 1004 arranged along the radial direction of the shell, and the first baffle and the second baffle are spaced apart to form a first space. Both baffles are hollowed out, and a premixing tube 1005 is arranged at the hollowed-out parts of the two baffles, and the premixing tube connects the hollowed-out parts of the first baffle and the second baffle.

[0055] Among them, multiple premixing tubes 1005 are arranged between the first baffle 1003 and the second baffle 1004, and a space is arranged between two adjacent premixing tubes, and air can enter the premixing tube. The first shell is provided with a pipeline 1001 connected to the first space to form a first fuel inlet pipe 2, and the first baffle, the second baffle and the premixing tube form a first fuel distribution chamber 1007. A first fuel nozzle is arranged on the side of the premixing tube so that the first fuel entering the first space enters the premixing tube through the first fuel nozzle 1006, and the air and the first fuel are premixed in the premixing tube.

[0056] Specifically, the catalytic carrier 1102 is a porous medium, which can be made of ceramic or other high-temperature resistant materials. The porous medium is provided with a catalyst for fuel combustion. The porous medium has pores. The mixed gas of air and the first fuel flows out through the first premixing component into the catalytic combustion section, and a catalytic combustion reaction is carried out on the fine surface of the catalytic combustion section.

[0057] Moreover, the first shell specifically includes a first section 1002 and a second section 1101 , and the first section and the second section are specifically snap-connected.

[0058] refer to Figure 4 As shown, the second premixing component includes a second fuel distribution chamber 1201, which is an annular member and has a set thickness. A second fuel inlet pipe 4 is arranged outside the second fuel distribution chamber, and the second fuel inlet pipe passes through the second shell. A plurality of second fuel spray holes 1206 are arranged on the inner side of the second fuel distribution chamber, and the second fuel spray holes are arranged close to the combustion tube. Air flows through the inner side of the second fuel distribution chamber and is premixed with the fuel sprayed from the second fuel spray holes 1206.

[0059] A third fuel distribution chamber 1202 is provided inside the second fuel distribution chamber, a swirl blade 1205 is provided between the third fuel distribution chamber and the second fuel distribution chamber, one end of the third fuel distribution chamber is arranged beyond the second fuel distribution chamber, a third fuel inlet pipe 5 is provided on the side of the third fuel distribution chamber beyond the second fuel distribution chamber, the third fuel inlet pipe 5 is arranged opposite to the second fuel inlet pipe 4, the third fuel inlet pipe passes through the second shell, a third fuel spray hole 1204 is provided on the outer side of the third fuel distribution chamber, the third fuel spray hole is arranged between the swirl blade 1205 and the second fuel spray hole 1206, the third fuel enters the third fuel distribution chamber, is sprayed from the third fuel spray hole and is premixed with the air outside the third fuel distribution chamber;

[0060] The third fuel distribution chamber is an annular part, and a circulation channel 1203 is formed inside the third fuel distribution chamber. The inner wall of the third fuel distribution chamber is arranged beyond the outer wall. A protrusion is arranged on the end of the outer wall of the third fuel distribution chamber close to the combustion tube. The protrusion is trumpet-shaped, and a second hole 1207 is arranged on the end face of the protrusion. The inner wall of the third fuel distribution chamber is arranged beyond the outer wall. A distance is set between the protruding inner wall of the third fuel distribution chamber and the inner surface of the protrusion. A first hole 1209 is arranged on the end of the protruding inner wall of the third fuel distribution chamber close to the combustion tube. The inner diameter of the first hole is larger than the inner diameter of the second hole. A small amount of air enters the circulation channel 1203, passes through the first hole 1209, impacts the inner wall surface of the protrusion 1208, and then is ejected through the second hole 1207, thereby cooling the wall surface of the third fuel distribution chamber.

[0061] In addition, it is easy to understand that the outer diameter of the protrusion on one side close to the combustion tube is larger than the outer diameter on the other side, the end face of the protrusion can be set flush with the end face of the second fuel distribution chamber close to the combustion tube, and the maximum outer diameter of the protrusion is smaller than the inner diameter of the second fuel distribution chamber.

[0062] Specifically, the swirl blades 1205 are arranged between the inner wall of the third fuel distribution chamber and the inner wall of the second fuel distribution chamber. Multiple swirl blades are arranged around the outside of the third fuel distribution chamber. The width of the swirl blades gradually increases from the third fuel distribution chamber to the second fuel distribution chamber. The swirl blades are inclined relative to the central axis of the third fuel distribution chamber.

[0063] In addition, the second premixing component 12 is supported on the inner surface of the second shell by a fixed support 15. The fixed support includes an annular ring. The inner surface of the annular ring is provided with legs at set angles to support the second premixing component 12, so that air can pass through the fixed support into the area between the combustion tube and the shell.

[0064] In this way, a portion of the air enters the second premixing component 12, passes through the swirl blades to generate a swirl velocity, is mixed with the second fuel and the third fuel, and enters the burner for a combustion reaction.

[0065] In this embodiment, the central axes of the air inlet, the first premixing component, the second premixing component, the combustion tube, and the outlet flange are all arranged on the same straight line.

[0066] It is easy to understand that the combustion tube is annularly arranged with a support member 16, which is an annular support member, and is arranged along the radial direction of the second shell. The position of the support member relative to the combustion tube is movable, and the combustion tube is supported in the second shell by the support member. The support member is provided with a plurality of flow holes, and the support member is used to set a distance between the combustion tube and the second shell to avoid excessive temperature of the second shell.

[0067] refer to Figure 5 As shown, the combustion tube 14 includes a plurality of annular members, and two adjacent annular members are overlapped so that a gap connected to the combustion chamber inside the combustion tube is formed at the overlapped portion of the two adjacent annular members, and the annular members are provided with cooling holes on the outside of the gap, and air enters the gap from the cooling holes to form an air film on the inner wall of the annular member, and some combustion tubes are provided with mixing holes so that part of the air enters the combustion chamber;

[0068] Specifically, the combustion tube is provided with four annular members, namely a second annular member 1403, a third annular member 1405 and a fourth annular member 1406. A first annular member 1402 is provided at one end of the second annular member away from the third annular member, and no gap is formed between the first annular member and the second annular member. The first annular member 1402 is connected to a front end plate 1401, an opening is provided on the front end plate, and a second fuel distribution chamber is inserted into the opening of the front end plate. One side of the third annular member is located on one side of the second annular member, and a gap is formed therebetween. One side of the fourth annular member is located on one side of the third annular member, and one end of the fourth annular member is connected to a reduced diameter section 1407. Cooling holes 1408 are provided at corresponding gaps of the third annular member 1405 and the fourth annular member 1406.

[0069] The mixing holes are arranged at the third annular member, and the mixing holes include a first mixing hole 1410 and a second mixing hole 1411. The inner diameter of the first mixing hole 1410 is larger than the inner diameter of the second mixing hole 1411. The first mixing holes 1410 and the second mixing holes 1411 are respectively arranged in a circle around the third annular member, and the two are staggered. The interval angle between two adjacent first mixing holes 1410 and two adjacent second mixing holes 1411 is set;

[0070] In some examples, an inner ring part 1404 is fixed inside the first ring part 1402 and the second ring part, the middle of the inner ring part is fixed to the inner surface of the connection between the first ring part 1402 and the second ring part, and gaps are also provided between the two sides of the inner ring part and the first ring part and the second ring part. The first ring part and the second ring part are also provided with cooling holes. Air enters the gap through the cooling holes and is ejected from the side of the gap, forming an air film on the inner wall surface of the outer ring part, thereby separating the first ring part 1402 and the second ring part 1403 from the high-temperature combustion gas inside the combustion tube.

[0071] It can be understood that in order to maintain the spacing of the gaps, positioning pins 1409 are set on the outer surface of the ring inside each gap, and a positioning pin 1409 is set on the outer surface of each ring at a set distance, and the positioning pins are in contact with the outer ring.

[0072] In addition, an ignition component such as a spark plug is installed through the spark plug seat 6, and the spark plug passes through the second shell and enters the combustion tube. The ignition component can ignite the fuel in the combustion tube.

[0073] Specifically, air enters from the air inlet flange 1, passes through the first premixing component 10, and is premixed with the first fuel. The mixed gas enters the catalytic combustion section for catalytic combustion reaction, and the combustion exhaust passes through the subsequent structures and is discharged from the outlet flange 8. When the catalytic combustion section is not working and the first fuel is not introduced, the air passes through the first premixing component 10 and the catalytic combustion section 11 and enters the flame combustion zone behind. A part of the air enters the second premixing component 12, passes through the swirl blades to generate swirl velocity, mixes with the second fuel and / or the third fuel, and enters the combustion tube 14 for combustion reaction. Another part of the air passes through the gap between the combustion tube 14 and the shell 13, enters the combustion tube 14 from the cooling hole 1408 and the mixing hole on the wall of the combustion tube 14, and is discharged through the outlet flange 8.

[0074] The burner provided in this embodiment can select different combustion modes according to the composition of different fuels and the fuel-air ratio. When the fuel calorific value is high and the flow rate is large, flame combustion is used; when the fuel calorific value is low, or the fuel flow rate is low relative to the air flow rate, catalytic combustion is used, and catalytic combustion can be performed at a relatively low temperature; before starting the catalytic combustion, it is necessary to use flame combustion to preheat the burner to the set temperature; in addition, the catalytic carrier at the catalytic combustion section can be flexibly disassembled, replaced, repaired, or removed, and can be used flexibly. The catalytic combustion section is arranged before the flame combustion, which can effectively prevent the catalytic combustion section from being burned by high-temperature air and improve its life and stability.

[0075] Embodiment 2

[0076] This embodiment discloses a working method of a catalytic-flame integrated burner, including the following contents:

[0077] Air enters the housing through the air inlet;

[0078] The first fuel enters the first premixing component, and after being premixed with air in the first premixing component, enters the catalytic combustion section for catalytic combustion;

[0079] Alternatively, the second fuel and / or the third fuel enters the second premixing component to be premixed with the air, and after the premixing, enters the combustion tube to be burned.

[0080] Of course, in some examples, the first fuel is premixed with the air in the first premixing component and then enters the catalytic combustion section for catalytic combustion, while the second fuel and / or the third fuel enters the second premixing component for premixing with the air and then enters the combustion tube for combustion after premixing;

[0081] Before starting catalytic combustion, the burner is usually preheated to a set temperature by flame combustion.

[0082] 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. A catalytic-flame integrated burner, characterized in that: The invention comprises a shell, one side of which is provided with an air inlet, a first premixing component, a catalytic combustion section, a second premixing component and a combustion barrel are sequentially arranged in the shell, the catalytic combustion section and the first premixing component are spaced at a distance, the first premixing component realizes premixing of a first fuel and air, the second premixing component and the catalytic combustion section are spaced at a distance, the gas flowing out of the catalytic combustion section enters the combustion barrel through the second premixing component, the second premixing component realizes premixing of a second fuel and / or a third fuel and air, the outlet end of the second premixing component is connected to the inlet end of the combustion barrel, so that the fuel is catalytically combusted in the catalytic combustion section or flame-combusted in the combustion barrel.

2. A catalytic-flame integrated burner according to claim 1, characterized in that: The shell includes a first shell and a second shell, the first shell is detachably connected to the second shell, the first shell is provided with the first premixing component and the catalytic combustion section, the second shell is provided with the second premixing component and the combustion tube, and the tail end of the combustion tube passes through the second shell.

3. A catalytic-flame integrated burner according to claim 2, characterized in that: The catalytic combustion section is removable relative to the first shell; A limiting member is provided in the first shell to limit one end of the catalytic combustion section, and an annular support plate is provided at one end of the second shell to limit the other end of the catalytic combustion section; The air inlet is arranged at an end of the first shell away from the second shell.

4. A catalytic-flame integrated burner according to claim 1, characterized in that: The first premixing component includes a first baffle and a second baffle arranged along the radial direction of the shell, the first baffle and the second baffle are spaced apart to form a first space, the two baffles are hollowed out, a premixing tube is arranged at the hollowed-out parts of the two baffles, air can enter the premixing tube, the first shell is provided with a first fuel inlet pipe connected to the first space, and a first fuel injection hole is arranged on the side of the premixing tube so that the first fuel entering the first space enters the premixing tube through the first fuel injection hole.

5. A catalytic-flame integrated burner according to claim 1, characterized in that: The catalytic combustion section is a porous medium.

6. A catalytic-flame integrated burner according to claim 1, characterized in that: The second premixing component includes a second fuel distribution chamber, which is an annular member. A second fuel inlet pipe is arranged on the outer side of the second fuel distribution chamber, and the second fuel inlet pipe passes through the shell. A plurality of second fuel spray holes are arranged on the inner side of the second fuel distribution chamber, and the second fuel spray holes are arranged close to the combustion tube.

7. A catalytic-flame integrated burner according to claim 6, characterized in that: A third fuel distribution chamber is arranged inside the second fuel distribution chamber, a swirl vane is arranged between the third fuel distribution chamber and the second fuel distribution chamber, one end of the third fuel distribution chamber is arranged beyond the second fuel distribution chamber, a third fuel inlet pipe is arranged outside the third fuel distribution chamber, the third fuel inlet pipe passes through the shell, and a third fuel spray hole is arranged outside the third fuel distribution chamber; The third fuel distribution chamber is an annular part, a protrusion is arranged at one end of the third fuel distribution chamber close to the combustion tube, the inner wall of the third fuel distribution chamber is arranged beyond the outer wall, a first hole is arranged at one end of the third fuel distribution chamber close to the combustion tube, a second hole is arranged at the protrusion, and the inner diameter of the first hole is greater than the inner diameter of the second hole.

8. A catalytic-flame integrated burner according to claim 1, characterized in that: The combustion tube comprises a plurality of annular members, two adjacent annular members are overlapped so that a gap connected to the combustion chamber inside the combustion tube is formed at the overlapped position of the two adjacent annular members, the annular members are provided with cooling holes on the outside of the gap, air enters the gap from the cooling holes and forms an air film on the inner wall of the annular members, and some combustion tubes are provided with mixing holes so that part of the air enters the combustion chamber; An inner ring member is arranged inside the higher ring member, gaps are also arranged between the two sides of the inner ring member and the higher ring member, and cooling holes are also arranged on the outer side of the inner ring member of the higher ring member.

9. A catalytic-flame integrated burner according to claim 1, characterized in that: Also included is an ignition component, which passes through the housing and enters the combustion cylinder; A support member is arranged in the annular direction of the combustion cylinder to support the combustion cylinder in the shell, and a plurality of flow holes are arranged in the support member.

10. A method for operating a catalytic-flame integrated burner according to any one of claims 1 to 9, characterized in that: It includes the following: Air enters the housing through the air inlet; The first fuel enters the first premixing component, and after being premixed with air in the first premixing component, enters the catalytic combustion section for catalytic combustion; Alternatively, the second fuel and / or the third fuel enters the second premixing component to be premixed with the air, and after the premixing, enters the combustion tube to be burned.

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