Combustor

Abstract

The utility model provides a burner. A first shell of the combustor is provided with a mounting hole, an air inlet, a containing cavity and a combustion cavity, and the air inlet communicates with the containing cavity so as to be used for conveying air into the containing cavity. The air inlet device is provided with a first exhaust hole and a second exhaust hole which are located in the containing cavity, the first exhaust hole is used for conveying fuel gas, and the second exhaust hole is used for conveying tail gas; the gas mixing device is provided with a first gas inlet hole and a mixing cavity, the mixing cavity communicates with the combustion cavity, and the containing cavity communicates with the mixing cavity through the first gas inlet hole; at least part of air conveyed into the containing cavity through the air inlet is mixed with tail gas exhausted through the second exhaust hole after flowing into the mixing cavity through the first air inlet hole, and the mixed gas is mixed with fuel gas exhausted through the first exhaust hole in the process of flowing into the combustion cavity. The burner for sulfur recovery effectively solves the problem that in the prior art, the emission amount of nitric oxide of a burner for sulfur recovery is high.

Description

Technical Field

[0001] The utility model relates to the technical field of sulfur recovery, in particular to a burner. Background Art

[0002] At present, in the field of sulfur recovery technology, the sulfur recovery rate cannot reach 100% because the sulfur recovery process is affected by thermodynamic equilibrium. A small amount of sulfur will be mixed into the exhaust gas in the form of hydrogen sulfide, sulfur oxide, carbonyl sulfur, carbon disulfide, etc., and the toxic and harmful exhaust gas containing sulfur element is not allowed to be discharged directly into the air and needs further treatment.

[0003] In the existing technology, the most commonly used method for treating sulfur-containing exhaust gas is exhaust gas incineration technology. Its main principle is to introduce air and gas into a burner for mixing and combustion, and use the high temperature generated by the combustion of gas to heat the exhaust gas, so as to promote the chemical reaction between the sulfur-containing exhaust gas and the oxygen in the air to generate sulfur dioxide, so that the staff can recover the sulfur element.

[0004] However, during the combustion process of the above-mentioned burner, uneven mixing is very likely to occur between the exhaust gas and the air, which in turn leads to excessive local oxygen concentration in the burner. The excessively high concentration of oxygen will react with nitrogen at high temperature to generate thermal nitrogen oxides, which, on the one hand, affects the generation efficiency of sulfur dioxide and thus affects the recovery efficiency of sulfur in the exhaust gas; on the other hand, with the increasingly stringent nitrogen oxide emission content in environmental protection indicators, the burner is unable to meet the corresponding exhaust emission requirements. Utility Model Content

[0005] The main purpose of the utility model is to provide a burner to solve the problem of high nitrogen oxide emission of the burner for sulfur recovery in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a burner, comprising: a first shell, having a mounting hole, an air inlet, a accommodating chamber and a combustion chamber, the air inlet being connected to the accommodating chamber for conveying air into the accommodating chamber; an air intake device, arranged at the mounting hole, the air intake device having a first exhaust hole and a second exhaust hole located in the accommodating chamber, the first exhaust hole being used to convey fuel gas, and the second exhaust hole being used to convey exhaust gas; a gas mixing device, having a first air inlet hole and a mixing chamber, the mixing chamber being connected to the combustion chamber, and the accommodating chamber being connected to the mixing chamber through the first air inlet hole; wherein the second exhaust hole is located in the mixing chamber, the first exhaust hole is located outside the mixing chamber and on a side of the second exhaust hole close to the combustion chamber, at least part of the air conveyed into the accommodating chamber via the air inlet is mixed with the exhaust gas discharged via the second exhaust hole after flowing into the mixing chamber through the first air inlet hole, and the mixed gas is mixed with the fuel gas discharged via the first exhaust hole in the process of flowing to the combustion chamber.

[0007] Furthermore, the gas mixing device includes a supporting structure and a plurality of guide structures arranged on the supporting structure, the supporting structure is arranged on the first shell, the plurality of guide structures are arranged around the air intake device at intervals to form a mixing chamber, and a first air intake hole is formed between two adjacent guide structures.

[0008] Furthermore, the guide structure is a plate-like structure, and two adjacent plate-like structures surround each other with their plate surfaces facing each other to form a first air inlet hole; wherein, along the direction in which the air flows into the mixing chamber, the distance between the two adjacent plate-like structures gradually decreases.

[0009] Furthermore, the plate-like structure is arranged in an arc shape, and a side of the plate-like structure that is away from the air intake device is convex.

[0010] Furthermore, the air intake device includes: a first air intake structure, having a second air intake hole, a first gas delivery channel and a first exhaust hole, the second air intake hole being connected to the first exhaust hole through the first gas delivery channel; a second air intake structure, which is sleeved on the first air intake structure, the second air intake structure having a third air intake hole, a second gas delivery channel and a second exhaust hole, the third air intake hole being connected to the second exhaust hole through the second gas delivery channel.

[0011] Furthermore, the first air intake structure includes: a second shell body, which is arranged in a columnar shape, the inner cavity of the second shell body is a first gas delivery channel, and the first exhaust hole is arranged on the outer peripheral surface of the second shell body; a first tubular structure, which is arranged on the second shell body and is connected to the first gas delivery channel, and the end of the first tubular structure away from the second shell body is a second air intake hole; wherein, along the flow direction of the fuel gas, the diameter of at least part of the second shell body gradually decreases to form a tapered section, and the tapered section is located on the side of the first exhaust hole away from the combustion chamber.

[0012] Furthermore, the second air intake structure includes: a third shell, which is sleeved on the second shell, and a second gas delivery channel is formed between at least a portion of the inner wall of the third shell and the outer peripheral surface of the second shell; a second tubular structure, which is arranged on the third shell and is connected to the second gas delivery channel, and the end of the second tubular structure away from the third shell is a third air intake hole; an injection device, which is arranged on the third shell, and the injection device includes a third tubular structure and an injection member, and the injection member is connected to the second gas delivery channel through the third tubular structure; wherein the injection hole of the injection member is the second exhaust hole, and there are multiple injection devices, and the multiple injection devices are arranged at intervals around the second shell.

[0013] Furthermore, the supporting structure includes: a cylindrical body, which is sleeved on at least part of the air intake device; a connecting piece, which is arranged on one end of the cylindrical body, and the cylindrical body is connected to the first shell through the connecting piece; a plate-like support member, which is arranged on the other end of the cylindrical body, and the plate-like support member has a first penetration hole and a second penetration hole, the first penetration hole is used for the injection member to penetrate, and the second penetration hole is used for the second shell to penetrate; wherein, the guide structure is arranged on the plate surface of the plate-like support member away from the cylindrical body, and at least part of the injection member extends into the mixing chamber after passing through the first penetration hole.

[0014] Further, the first shell includes: a first sub-shell, including a cylindrical structure and an end plate arranged on one end of the cylindrical structure, a combustion chamber is formed between the end plate and at least part of the inner wall of the cylindrical structure, and the end plate has a first flow hole connected to the combustion chamber; a second sub-shell, a cover is arranged on one end of the cylindrical structure with the end plate, a accommodating chamber is formed between at least part of the inner wall of the second sub-shell and the end plate, and the second sub-shell has an air inlet and a mounting hole; wherein, the gas mixing device also includes an annular mounting plate and a cylindrical connecting structure, the annular mounting plate is arranged on one end of the guide structure away from the supporting structure, the cylindrical connecting structure is arranged on the annular mounting plate, and at least part of the cylindrical connecting structure extends into the first flow hole to connect the mixing chamber with the first flow hole.

[0015] Furthermore, the burner also includes: a flow balancing structure, which is cylindrical and arranged in the accommodating chamber, at least part of the gas mixing device is located in the inner cavity of the flow balancing structure, and there is a preset distance between the flow balancing structure and the inner wall of the first shell to separate at least part of the accommodating chamber into a flow balancing chamber; wherein the flow balancing structure has a second flow hole, and the flow balancing chamber is connected to the inner cavity of the flow balancing structure through the second flow hole; and a third flow hole is also arranged on the end plate, and the inner cavity of the flow balancing structure is connected to the combustion chamber through the third flow hole.

[0016] According to the technical solution of the utility model, the first shell of the burner has a mounting hole, an air inlet, a accommodating chamber and a combustion chamber. The air inlet is connected to the accommodating chamber for conveying air into the accommodating chamber. The air inlet device is arranged at the mounting hole and has a first exhaust hole and a second exhaust hole located in the accommodating chamber. The first exhaust hole is used to convey fuel gas, and the second exhaust hole is used to convey exhaust gas. The gas mixing device has a first air inlet and a mixing chamber. The mixing chamber is connected to the combustion chamber, and the accommodating chamber is connected to the mixing chamber through the first air inlet. The second exhaust hole is located in the mixing chamber, the first exhaust hole is located outside the mixing chamber and is located on the side of the second exhaust hole close to the combustion chamber. At least part of the air conveyed to the accommodating chamber through the air inlet flows into the mixing chamber through the first air inlet and is mixed with the exhaust gas discharged through the second exhaust hole. The mixed gas is mixed with the fuel gas discharged through the first exhaust hole in the process of flowing to the combustion chamber. In this way, the burner can perform staged mixing of air, exhaust gas and fuel gas during operation, that is, the air and exhaust gas can be primarily mixed in the mixing chamber of the gas mixing device, and the mixed air and exhaust gas are then secondarily mixed with the fuel gas to ensure that the oxygen in the mixed gas that finally flows into the combustion chamber has a high distribution uniformity, thereby avoiding the phenomenon that the local oxygen concentration in the combustion chamber is too high, which causes the reaction between oxygen and nitrogen and the generation of thermal nitrogen oxides, thereby solving the problem of high nitrogen oxide emissions from sulfur recovery burners in the prior art and improving the recovery efficiency of sulfur in sulfur-containing exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the three-dimensional structure of a burner according to an embodiment of the utility model is shown;

[0019] Figure 2 Shows Figure 1 A cross-sectional schematic diagram of a burner in FIG.

[0020] Figure 3 Shows Figure 2 An enlarged schematic diagram of the burner at point A;

[0021] Figure 4 Shows Figure 1 A side view of a burner in FIG.

[0022] Figure 5 Shows Figure 1 A schematic diagram of the three-dimensional structure of a gas mixing device in a burner;

[0023] Figure 6 Shows Figure 5 A schematic cross-sectional view of a gas mixing device;

[0024] Figure 7 Shows Figure 1 A schematic diagram of the three-dimensional structure of the air intake device of the burner;

[0025] Figure 8 Shows Figure 1 Schematic diagram of the three-dimensional structure of the flow equalizing device of the burner.

[0026] The above drawings include the following reference numerals:

[0027] 10. first housing; 11. mounting hole; 12. air inlet; 13. accommodating chamber; 14. combustion chamber; 15. first sub-housing; 151. cylindrical structure; 152. end plate; 1521. first flow hole; 1522. third flow hole; 16. second sub-housing;

[0028] 20. air intake device; 21. first exhaust hole; 22. second exhaust hole;

[0029] 23. First air inlet structure; 231. Second air inlet hole; 232. First gas delivery channel; 233. Second shell; 2331. Conical section; 234. First tubular structure;

[0030] 24. Second air inlet structure; 241. Third air inlet hole; 242. Second gas delivery channel; 243. Third shell; 244. Second tubular structure; 245. Third tubular structure; 246. Injection member;

[0031] 30. Gas mixing device; 31. First air inlet; 32. Mixing chamber;

[0032] 33. Support structure; 331. Cylindrical body; 332. Connector; 333. Plate-shaped support member;

[0033] 34. flow guide structure; 35. annular mounting plate; 36. cylindrical connecting structure;

[0034] 40. Flow-sharing structure; 41. Flow-sharing cavity; 42. Second flow hole. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0037] In the present invention, unless otherwise specified, directional words such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0038] In order to solve the problem of high nitrogen oxide emissions from sulfur recovery burners in the prior art, the present application provides a burner.

[0039] like Figures 1 to 8 As shown, the burner includes a first shell 10, an air intake device 20 and a gas mixing device 30. The first shell 10 has a mounting hole 11, an air intake port 12, a receiving chamber 13 and a combustion chamber 14. The air intake port 12 is connected to the receiving chamber 13 to deliver air to the receiving chamber 13. The air intake device 20 is arranged at the mounting hole 11. The air intake device 20 has a first exhaust hole 21 and a second exhaust hole 22 located in the receiving chamber 13. The first exhaust hole 21 is used to deliver fuel gas, and the second exhaust hole 22 is used to deliver exhaust gas. The gas mixing device 30 has a first air intake hole 31 and a mixing chamber 32. The mixing chamber 32 is connected to the combustion chamber 14. The receiving chamber 13 is connected to the mixing chamber 32 through the first air intake hole 31. Among them, the second exhaust hole 22 is located in the mixing chamber 32, and the first exhaust hole 21 is located outside the mixing chamber 32 and on the side of the second exhaust hole 22 close to the combustion chamber 14. At least part of the air delivered to the accommodating chamber 13 through the air inlet 12 flows into the mixing chamber 32 through the first air inlet hole 31, and then mixes with the exhaust gas discharged through the second exhaust hole 22. The mixed gas is mixed with the fuel gas discharged through the first exhaust hole 21 in the process of flowing to the combustion chamber 14.

[0040] Applying the technical solution of this embodiment, the first shell 10 of the burner has a mounting hole 11, an air inlet 12, a accommodating chamber 13 and a combustion chamber 14. The air inlet 12 is connected to the accommodating chamber 13 for conveying air into the accommodating chamber 13. The air intake device 20 is arranged at the mounting hole 11 and has a first exhaust hole 21 and a second exhaust hole 22 located in the accommodating chamber 13. The first exhaust hole 21 is used to convey fuel gas, and the second exhaust hole 22 is used to convey exhaust gas. The gas mixing device 30 has a first air inlet hole 31 and a mixing chamber 32. The mixing chamber 32 is connected to the combustion chamber 14, and the accommodating chamber 13 is connected to the mixing chamber 32 through the first air inlet hole 31. Among them, the second exhaust hole 22 is located in the mixing chamber 32, and the first exhaust hole 21 is located outside the mixing chamber 32 and located on the side of the second exhaust hole 22 close to the combustion chamber 14. After at least part of the air delivered to the accommodating chamber 13 through the air inlet 12 flows into the mixing chamber 32 through the first air inlet 31, it is mixed with the tail gas discharged through the second exhaust hole 22. In the process of flowing to the combustion chamber 14, the mixed gas is mixed with the fuel gas discharged through the first exhaust hole 21. In this way, the burner can perform graded mixing of air, tail gas and fuel gas during operation, that is, the air and tail gas can be mixed in the mixing chamber 32 of the gas mixing device 30 for the primary mixing, and the mixed air and tail gas are mixed with the fuel gas for the secondary mixing to ensure that the oxygen in the mixed gas finally flowing into the combustion chamber 14 has a high distribution uniformity, so as to avoid the phenomenon that the local oxygen concentration in the combustion chamber is too high, resulting in the reaction between oxygen and nitrogen and the generation of thermal nitrogen oxides, thereby solving the problem of high nitrogen oxide emissions of sulfur recovery burners in the prior art and improving the recovery efficiency of sulfur in sulfur-containing tail gas.

[0041] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the gas mixing device 30 includes a support structure 33 and a plurality of flow-guiding structures 34 arranged on the support structure 33. The support structure 33 is arranged on the first shell 10. The plurality of flow-guiding structures 34 are arranged at intervals around the air intake device 20 to form a mixing chamber 32. A first air intake hole 31 is formed around two adjacent flow-guiding structures. In this way, the above arrangement can, on the one hand, support the flow-guiding structure 34 through the support structure 33 to ensure the overall structural strength of the gas mixing device 30; on the other hand, it makes the formation of the first air intake hole 31 and the mixing chamber 32 simpler and easier to process, thereby reducing the processing difficulty of the staff. At the same time, the above arrangement makes the number of flow-guiding structures 34 more flexible and diverse to adapt to different working conditions and usage requirements, and also improves the processing flexibility of the staff.

[0042] In this embodiment, there are twelve flow-guiding structures 34 , and the twelve flow-guiding structures 34 are arranged at intervals around the air intake device 20 to form twelve first air intake holes 31 .

[0043] It should be noted that the number of the guide structures 34 is not limited thereto and can be adjusted according to working conditions and usage requirements. Optionally, the number of the guide structures 34 is two, three, four, five, six, seven, or more.

[0044] like Figure 2 , Figure 3 , Figure 5 and Figure 6 As shown, the guide structure 34 is a plate-like structure, and two adjacent plate-like structures are arranged on the plate surfaces facing each other to form a first air inlet hole 31. Among them, along the direction in which the air flows into the mixing chamber 32, the distance between the two adjacent plate-like structures gradually decreases. In this way, the first air inlet hole 31 formed by the guide structure 34 arranged in a plate shape has a certain guiding effect on the air, that is, the air will flow along the plate surface of the plate-like structure in the process of flowing into the mixing chamber 32, and the guided air can collide and mix with the exhaust gas more violently in the mixing chamber 32, so as to improve the uniformity of mixing between the exhaust gas and the air. At the same time, since the distance between the two adjacent plate-like structures gradually decreases, the flow rate of the air will continue to increase in the process of flowing into the mixing chamber 32, further improving the uniformity of mixing between the exhaust gas and the air.

[0045] like Figure 6 As shown, the plate-like structure is arranged in an arc shape, and the plate-like structure protrudes toward the side away from the air intake device 20. In this way, the above arrangement enables the air guided by the first air intake hole 31 to swirl in the mixing chamber 32, so as to further improve the mixing uniformity between the exhaust gas and the air.

[0046] Optionally, the flow guiding structure 34 is a blade.

[0047] like Figure 1 , Figure 2 and Figure 7As shown, the air intake device 20 includes a first air intake structure 23 and a second air intake structure 24. The first air intake structure 23 has a second air intake hole 231, a first gas delivery channel 232 and a first exhaust hole 21. The second air intake hole 231 is connected to the first exhaust hole 21 through the first gas delivery channel 232. The second air intake structure 24 is sleeved on the first air intake structure 23. The second air intake structure 24 has a third air intake hole 241, a second gas delivery channel 242 and a second exhaust hole 22. The third air intake hole 241 is connected to the second exhaust hole 22 through the second gas delivery channel 242. In this way, the air intake device 20 can separately transport air and exhaust gas through the first air intake structure 23 and the second air intake structure 24 to achieve the exhaust gas delivery capacity and air delivery capacity of the air intake device 20.

[0048] like Figure 1 , Figure 2 and Figure 7 As shown, the first air intake structure 23 includes a second shell 233 and a first tubular structure 234. The second shell 233 is arranged in a columnar shape. The inner cavity of the second shell 233 is the first gas delivery channel 232. The first exhaust hole 21 is arranged on the outer peripheral surface of the second shell 233. The first tubular structure 234 is arranged on the second shell 233 and is connected to the first gas delivery channel 232. The end of the first tubular structure 234 away from the second shell 233 is the second air intake hole 231. In the flow direction of the gas, the diameter of at least part of the second shell 233 gradually decreases to form a tapered section 2331. The tapered section 2331 is located on the side of the first exhaust hole 21 away from the combustion chamber 14. In this way, the tapered section 2331 can increase the flow velocity of the gas in the first gas delivery channel 232, so as to increase the flow velocity of the gas discharged through the first exhaust hole 21, thereby improving the mixing uniformity of the gas and the exhaust gas. At the same time, the above arrangement makes the structure of the first air intake structure 23 simpler, easier to process and realize, thereby reducing the processing cost of the first air intake structure 23 and the processing difficulty of the staff.

[0049] like Figure 1 , Figure 2 and Figure 7As shown, the second air intake structure 24 includes a third shell 243 and a second tubular structure 244. The third shell 243 is sleeved on the second shell 233. The second gas delivery channel 242 is formed between at least part of the inner wall of the third shell 243 and the outer peripheral surface of the second shell 233. The second tubular structure 244 is arranged on the third shell 243 and communicates with the second gas delivery channel 242. The end of the second tubular structure 244 away from the third shell 243 is a third air intake hole 241. The injection device is arranged on the third shell 243. The injection device includes a third tubular structure 245 and an injection member 246. The injection member 246 is communicated with the second gas delivery channel 242 through the third tubular structure 245. Among them, the injection hole of the injection member 246 is the second exhaust hole 22. There are multiple injection devices, and the multiple injection devices are arranged at intervals around the second shell 233. In this way, since the third shell 243 is sleeved on the second shell 233 and surrounds the outer circumference of the second shell 233 to form the second gas delivery channel 242, the first air intake structure 23 and the second air intake structure 24 are integrated, thereby reducing the overall volume of the air intake device 20 and miniaturizing the air intake device 20. At the same time, the above arrangement makes the number of injection devices more flexible and diverse to adapt to different working conditions and usage requirements, and also improves the processing flexibility of the staff.

[0050] In this embodiment, there are twelve injection devices, and the twelve injection devices are arranged at intervals around the second shell 233.

[0051] It should be noted that the number of the spray devices is not limited thereto and can be adjusted according to working conditions and usage requirements. Optionally, the number of the spray devices is two, three, four, five, six, seven, or more.

[0052] In this embodiment, twelve injection devices and twelve first air inlet holes 31 are arranged in one-to-one correspondence, so that the twelve injection members 246 of the twelve injection devices are arranged in one-to-one correspondence with the twelve first air inlet holes 31. In this way, the above arrangement enables the injection members 246 to be arranged opposite to the first air inlet holes 31, and further enables the high-speed flowing air guided through the first air inlet holes 31 to directly collide and mix with the high-speed flowing exhaust gas ejected through the injection members 246, so as to further improve the mixing uniformity between the exhaust gas and the air.

[0053] In this embodiment, the injection member 246 is a tubular nozzle, and the second exhaust hole 22 is arranged on the outer peripheral surface of the nozzle.

[0054] In this embodiment, each injection member 246 is provided with a plurality of second exhaust holes 22 , and the plurality of second exhaust holes 22 are arranged at intervals around the central axis of the injection member 246 and at intervals along the extending direction of the injection member 246 .

[0055] Specifically, at least part of the second exhaust holes 22 on the outer peripheral surface of the injection member 246 are arranged opposite to the first air inlet hole 31 to ensure that at least part of the exhaust gas injected through the injection member 246 can directly collide and mix with the air.

[0056] like Figure 2 , Figure 3 and Figure 5 As shown, the support structure 33 includes a cylindrical body 331, a connecting member 332 and a plate-shaped supporting member 333. The cylindrical body 331 is sleeved on at least part of the air intake device 20. The connecting member 332 is arranged on one end of the cylindrical body 331, and the cylindrical body 331 is connected to the first shell 10 through the connecting member 332. The plate-shaped supporting member 333 is arranged on the other end of the cylindrical body 331. The plate-shaped supporting member 333 has a first through hole and a second through hole. The first through hole is used for the injection member 246 to be inserted, and the second through hole is used for the second shell 233 to be inserted. Among them, the flow guide structure 34 is arranged on the plate surface of the plate-shaped supporting member 333 away from the cylindrical body 331, and at least part of the injection member 246 extends into the mixing chamber 32 after passing through the first through hole. In this way, the above-mentioned arrangement, on the one hand, supports the second shell 233 of the first air intake structure 23 and the injection member 246 of the second air intake structure 24 through the plate-like support member 333, so as to support the air intake device 20, thereby improving the installation stability of the air intake device 20; on the other hand, by setting the connecting member 332, the supporting structure 33 can be connected to the first shell 10, so as to improve the installation stability of the supporting structure 33.

[0057] In this embodiment, the burner further includes a mounting flange, which is disposed at the mounting hole 11 , and the support structure 33 is fixed by passing fasteners through the mounting flange and the connecting member 332 .

[0058] like Figure 1 and Figure 2As shown, the first housing 10 includes a first sub-housing 15 and a second sub-housing 16. The first sub-housing 15 includes a cylindrical structure 151 and an end plate 152 disposed on one end of the cylindrical structure 151. The end plate 152 and at least part of the inner wall of the cylindrical structure 151 surround a combustion chamber 14. The end plate 152 has a first flow hole 1521 communicating with the combustion chamber 14. The second sub-housing 16 is covered on one end of the cylindrical structure 151 having the end plate 152. The accommodating chamber 13 is formed between at least part of the inner wall of the second sub-housing 16 and the end plate 152. The second sub-housing 16 has an air inlet 12 and a mounting hole 11. The gas mixing device 30 further includes an annular mounting plate 35 and a cylindrical connecting structure 36. The annular mounting plate 35 is arranged on one end of the flow guide structure 34 away from the support structure 33. The cylindrical connecting structure 36 is arranged on the annular mounting plate 35. At least part of the cylindrical connecting structure 36 extends into the first flow hole 1521, so that the mixing chamber 32 is connected with the first flow hole 1521. In this way, the above arrangement partially separates the accommodating chamber 13 and the combustion chamber 14 through the end plate 152, so as to prevent the high-temperature gas or even the flame in the combustion chamber 14 from entering the accommodating chamber 13 and causing damage to the device in the accommodating chamber 13, thereby extending the service life of the burner; on the other hand, the air intake device 20 located in the accommodating chamber 13 can be connected with the combustion chamber 14 through the first flow hole 1521, so as to realize combustion in the combustion chamber 14. At the same time, the above-mentioned arrangement, on the one hand, further reinforces the installation of multiple guide structures 34 through the annular mounting plate 35 to improve the installation stability of the guide structure 34; on the other hand, it realizes direct connection between the mixing chamber 32 and the combustion chamber 14 through the cylindrical connecting structure 36 to avoid the mixed exhaust gas, air and fuel gas from flowing into the accommodating chamber 13 through the gap between the combustion chamber 14 and the mixing chamber 32.

[0059] like Figure 2 , Figure 3 and Figure 8As shown, the burner further includes a flow balancing structure 40, which is cylindrical and arranged in the accommodating chamber 13, and at least part of the gas mixing device 30 is located in the inner cavity of the flow balancing structure 40, and there is a preset distance between the flow balancing structure 40 and the inner wall of the first shell 10, so as to separate at least part of the accommodating chamber 13 into a flow balancing chamber 41. The flow balancing structure 40 has a second flow hole 42, and the flow balancing chamber 41 is connected to the inner cavity of the flow balancing structure 40 through the second flow hole 42; the end plate 152 is also provided with a third flow hole 1522, and the inner cavity of the flow balancing structure 40 is connected to the combustion chamber 14 through the third flow hole 1522. In this way, after the air flows into the accommodating chamber 13, it will first fill the entire flow balancing chamber 41, and then flow into the inner cavity of the flow balancing structure 40 through the second flow hole 42 to improve the uniformity of air distribution in the flow balancing structure 40, and the air in the inner cavity of the flow balancing structure 40 will flow into the mixing chamber 32 evenly through the first air inlet hole 31, thereby improving the uniformity of air distribution in the mixing chamber 32 and the subsequent mixing uniformity between the air and the exhaust gas. At the same time, the air in the inner cavity of the flow balancing structure 40 can also flow into the combustion chamber 14 through the third flow hole 1522 to balance the air pressure between the accommodating chamber 13 and the combustion chamber 14, thereby avoiding the flashback phenomenon at the first flow hole 1521, which causes damage to the intake device 20 and the gas mixing device 30, and prolongs the service life of the intake device 20 and the gas mixing device 30.

[0060] In this embodiment, compared with ordinary burners, the air intake equivalent of the burner in this embodiment is set to 1.2 to 1.5 times the air intake equivalent of ordinary burners. Specifically, although the burner in this embodiment achieves the improvement of oxygen distribution uniformity through the premixing of air and exhaust gas, it will cause the overall oxygen concentration to be too low, which will lead to the problem that the fuel gas cannot be burned. By increasing the air intake equivalent, on the one hand, the oxygen concentration in the mixed gas can be increased to ensure that the burner can burn; on the other hand, as the air intake equivalent increases, the gas pressure value in the accommodating chamber 13 will also increase, further avoiding the flashback phenomenon at the first flow hole 1521 and extending the service life of the burner.

[0061] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0062] The first shell of the burner has a mounting hole, an air inlet, a accommodating chamber and a combustion chamber. The air inlet is connected to the accommodating chamber for conveying air into the accommodating chamber. The air inlet device is arranged at the mounting hole and has a first exhaust hole and a second exhaust hole located in the accommodating chamber. The first exhaust hole is used to convey fuel gas, and the second exhaust hole is used to convey exhaust gas. The gas mixing device has a first air inlet and a mixing chamber. The mixing chamber is connected to the combustion chamber, and the accommodating chamber is connected to the mixing chamber through the first air inlet. The second exhaust hole is located in the mixing chamber, the first exhaust hole is located outside the mixing chamber and is located on the side of the second exhaust hole close to the combustion chamber. At least part of the air conveyed to the accommodating chamber through the air inlet flows into the mixing chamber through the first air inlet and is mixed with the exhaust gas discharged through the second exhaust hole. The mixed gas is mixed with the fuel gas discharged through the first exhaust hole in the process of flowing to the combustion chamber. In this way, the burner can perform staged mixing of air, exhaust gas and fuel gas during operation, that is, the air and exhaust gas can be primarily mixed in the mixing chamber of the gas mixing device, and the mixed air and exhaust gas are then secondarily mixed with the fuel gas to ensure that the oxygen in the mixed gas that finally flows into the combustion chamber has a high distribution uniformity, thereby avoiding the phenomenon that the local oxygen concentration in the combustion chamber is too high, which causes the reaction between oxygen and nitrogen and the generation of thermal nitrogen oxides, thereby solving the problem of high nitrogen oxide emissions from sulfur recovery burners in the prior art and improving the recovery efficiency of sulfur in sulfur-containing exhaust gas.

[0063] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0064] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0065] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0066] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A burner, characterized in that: include: A first shell (10) has a mounting hole (11), an air inlet (12), a accommodating chamber (13) and a combustion chamber (14); the air inlet (12) is in communication with the accommodating chamber (13) so as to transport air into the accommodating chamber (13); An air intake device (20) is arranged at the mounting hole (11), the air intake device (20) having a first exhaust hole (21) and a second exhaust hole (22) located in the accommodating cavity (13), the first exhaust hole (21) being used to transport fuel gas, and the second exhaust hole (22) being used to transport exhaust gas; A gas mixing device (30) comprising a first air inlet hole (31) and a mixing chamber (32), wherein the mixing chamber (32) is in communication with the combustion chamber (14), and the accommodating chamber (13) is in communication with the mixing chamber (32) via the first air inlet hole (31); The second exhaust hole (22) is located in the mixing chamber (32), and the first exhaust hole (21) is located outside the mixing chamber (32) and on a side of the second exhaust hole (22) close to the combustion chamber (14). At least part of the air delivered to the accommodating chamber (13) through the air inlet (12) flows into the mixing chamber (32) through the first air inlet hole (31) and is mixed with the exhaust gas discharged through the second exhaust hole (22). The mixed gas is mixed with the combustion gas discharged through the first exhaust hole (21) in the process of flowing to the combustion chamber (14).

2. The burner according to claim 1, characterized in that The gas mixing device (30) comprises a support structure (33) and a plurality of flow-guiding structures (34) arranged on the support structure (33); the support structure (33) is arranged on the first shell (10); the plurality of flow-guiding structures (34) are arranged at intervals around the air intake device (20) to form the mixing chamber (32); and the first air intake hole (31) is formed between two adjacent flow-guiding structures.

3. The burner according to claim 2, characterized in that: The guide structure (34) is a plate-like structure, and two adjacent plate-like structures surround each other with their plate surfaces facing each other to form the first air inlet hole (31); wherein, along the direction in which the air flows into the mixing chamber (32), the distance between the two adjacent plate-like structures gradually decreases.

4. The burner according to claim 3, characterized in that The plate-like structure is arranged in an arc shape, and the side of the plate-like structure facing away from the air intake device (20) is convex.

5. The burner according to claim 2, characterized in that: The air intake device (20) comprises: A first air intake structure (23) comprising a second air intake hole (231), a first gas delivery channel (232) and the first exhaust hole (21), wherein the second air intake hole (231) is connected to the first exhaust hole (21) via the first gas delivery channel (232); The second air intake structure (24) is sleeved on the first air intake structure (23), the second air intake structure (24) having a third air intake hole (241), a second gas delivery channel (242) and the second exhaust hole (22), the third air intake hole (241) being connected to the second exhaust hole (22) via the second gas delivery channel (242).

6. The burner according to claim 5, characterized in that The first air intake structure (23) comprises: The second shell (233) is arranged in a columnar shape, the inner cavity of the second shell (233) is the first gas delivery channel (232), and the first exhaust hole (21) is arranged on the outer peripheral surface of the second shell (233); a first tubular structure (234), arranged on the second shell (233) and connected to the first gas delivery channel (232), wherein an end of the first tubular structure (234) away from the second shell (233) is the second gas inlet hole (231); Wherein, along the flow direction of the gas, the diameter of at least a portion of the second shell (233) gradually decreases to form a conical section (2331), and the conical section (2331) is located on a side of the first exhaust hole (21) away from the combustion chamber (14).

7. The burner according to claim 6, characterized in that The second air intake structure (24) comprises: A third shell (243) is sleeved on the second shell (233), and the second gas delivery channel (242) is formed between at least a portion of the inner wall of the third shell (243) and the outer peripheral surface of the second shell (233); a second tubular structure (244), arranged on the third shell (243) and connected to the second gas delivery channel (242), wherein an end of the second tubular structure (244) away from the third shell (243) is the third gas inlet hole (241); an injection device, arranged on the third housing (243), the injection device comprising a third tubular structure (245) and an injection member (246), the injection member (246) being in communication with the second gas delivery channel (242) through the third tubular structure (245); The injection hole of the injection member (246) is the second exhaust hole (22), and there are a plurality of injection devices, which are arranged at intervals around the second shell (233).

8. The burner according to claim 7, characterized in that The support structure (33) comprises: A cylindrical body (331) is sleeved on at least a portion of the air intake device (20); A connecting piece (332) is arranged on one end of the cylindrical body (331), and the cylindrical body (331) is connected to the first shell (10) through the connecting piece (332); a plate-shaped support member (333) disposed on the other end of the cylindrical body (331), the plate-shaped support member (333) having a first penetration hole and a second penetration hole, the first penetration hole being used for the injection member (246) to penetrate, and the second penetration hole being used for the second shell (233) to penetrate; Wherein, the guide structure (34) is arranged on the plate surface of the plate-shaped support member (333) away from the cylindrical body (331), and at least a part of the injection member (246) passes through the first penetration hole and extends into the mixing chamber (32).

9. The burner according to claim 2, characterized in that The first housing (10) comprises: A first sub-shell (15), comprising a cylindrical structure (151) and an end plate (152) arranged on one end of the cylindrical structure (151), wherein the combustion chamber (14) is formed around the end plate (152) and at least a portion of the inner wall of the cylindrical structure (151), and the end plate (152) has a first flow hole (1521) communicating with the combustion chamber (14); a second sub-shell (16), which is covered on one end of the cylindrical structure (151) having the end plate (152), the accommodation cavity (13) being formed between at least a portion of the inner wall of the second sub-shell (16) and the end plate (152), and the second sub-shell (16) having the air inlet (12) and the mounting hole (11); Wherein, the gas mixing device (30) further comprises an annular mounting plate (35) and a cylindrical connecting structure (36), wherein the annular mounting plate (35) is arranged on one end of the flow guide structure (34) away from the support structure (33), and the cylindrical connecting structure (36) is arranged on the annular mounting plate (35), and at least a portion of the cylindrical connecting structure (36) extends into the first flow hole (1521) so that the mixing chamber (32) is connected with the first flow hole (1521).

10. The burner according to claim 9, characterized in that The burner also includes: a flow balancing structure (40), the flow balancing structure (40) being cylindrical and arranged in the accommodating chamber (13), at least a portion of the gas mixing device (30) being located in the inner chamber of the flow balancing structure (40), and a preset distance being provided between the flow balancing structure (40) and the inner wall of the first shell (10), so as to separate at least a portion of the accommodating chamber (13) into a flow balancing chamber (41); The flow balancing structure (40) has a second flow hole (42), and the flow balancing chamber (41) is connected to the inner cavity of the flow balancing structure (40) through the second flow hole (42); the end plate (152) is also provided with a third flow hole (1522), and the inner cavity of the flow balancing structure (40) is connected to the combustion chamber (14) through the third flow hole (1522).

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