Split type low-nitrogen burner of boiler

Abstract

The utility model discloses a split type low-nitrogen combustor of a boiler, and relates to the technical field of boiler combustion equipment. Comprising a supporting seat, a circle of guiding outer wall is fixedly connected to the top side of the supporting seat, a circle of circulating barrel is fixedly connected to one side of the guiding outer wall, a circle of collecting ring wall is fixedly connected between the inner walls of the ends, opposite to the supporting seat, of the circulating barrel, and a plurality of evenly-distributed recycling holes are formed in the surface of the collecting ring wall. And a circle of mixing pipe is fixedly connected between the inner walls of the recovery holes. According to the utility model, the overflowed flue gas which is not fully combusted is guided into the space between the circulating barrel and the mixing pipe through the arrangement of the outwards extending collecting ring wall and the recycling hole, and the flue gas which is not fully combusted is guided into the mixing pipe through the arrangement of the recycling outer wall and the guiding inner ring and is fully mixed with air for combustion; therefore, the nitrogen-containing gas is fully combusted, the content of nitrogen-containing compounds in the waste gas is reduced, and the pollution of the waste gas to the environment is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler combustion equipment technical field, concretely is a kind of split type low-nitrogen combustor of boiler. BACKGROUND

[0002] Oxycombustion is an emerging combustion technology, with the progress of oxygen production method, especially the progress of oxygen-enriched membrane technology, oxycombustion technology has been gradually popularized in recent years, and oxycombustion technology is reformed and realized on boiler, has the prospective development prospect, at present, oxycombustion is mainly applied in foreign countries and industrial kiln, in addition, oxycombustion technology also appears in the field of aviation and ship combustion, so-called oxycombustion technology refers to the oxygen content in air for combustion is more than 20.94% combustion, the increase of oxygen content in air makes the inert gas in air correspondingly reduced, theoretically, the temperature of combustion is increased, the increase of oxygen content in air makes the exhaust gas amount generated by combustion reduced, and the heat carried by the corresponding exhaust gas temperature is reduced, so that the combustion temperature is increased, and the purpose of energy saving and emission reduction is achieved.

[0003] In the above scheme, by setting the combustor fire tube, fuel supply pipeline, primary air supply area, secondary air supply area and cyclone, the smoke internal circulation can be realized, the generation amount of flue gas NOx is reduced without increasing FGR, the original combustion head part is optimized, the equipment emission is reduced, the boiler energy efficiency is improved, and the equipment cost is reduced, but in actual use, the mixed gas blown out may not be fully combusted, but is scattered to the surrounding, so that the tail gas contains more nitrogen-containing compounds, therefore, a split type low-nitrogen combustor of boiler is developed. UTILITY MODEL CONTENT

[0004] The main purpose of the utility model is to provide a split type low-nitrogen combustor of boiler, which can effectively solve the problems in the background art.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the utility model is as follows:

[0006] A split type low-nitrogen combustor of boiler, comprising a support seat, a ring of guide outer wall is fixedly connected to the top side of the support seat, a ring of circulation cylinder is fixedly connected to one side of the guide outer wall, a ring of collection ring wall is fixedly connected between the inner wall of one end of the circulation cylinder away from the support seat, a plurality of uniformly distributed recovery holes are formed on the surface of the collection ring wall, a ring of mixing pipe is fixedly connected between the inner walls of the recovery holes, a ring of air guide inner wall is fixedly connected to one end of the mixing pipe facing the support seat, and an air injection fan is arranged between the inner walls of the air guide inner wall.

[0007] Preferably, the two ends of the air guide inner wall are respectively fixedly connected with a ventilation support, and a rotating shaft is rotatably connected to the inner wall of the side of the ventilation support facing the mixing pipe, the outer edge of the rotating shaft is fixedly connected with the air injection fan inner wall, and one air extraction motor is arranged at the end of the rotating shaft away from the corresponding ventilation support.

[0008] Preferably, the guide outer wall is fixedly connected with a recovery outer wall on the side away from the mixing pipe, the inner side of the recovery outer wall is fixedly connected with a guide inner ring, and the recovery outer wall is fixedly connected with an air extraction pipe on the side away from the mixing pipe, and the inner wall of the air extraction pipe and the inner surface of the guide inner ring are smoothly connected.

[0009] Preferably, the guide inner ring is in contact with the surface of the corresponding ventilation support on the side facing the ventilation support, the surface of the two ventilation supports is provided with a plurality of ventilation holes which are uniformly distributed, and the inner and outer side edges of the joint side of the guide inner ring and the ventilation support and the adjacent inner walls of the adjacent two ventilation holes are flush.

[0010] Preferably, the end of the mixing pipe away from the guide outer wall is fixedly connected with a joint ring, and the outer edge of the joint ring is connected with the inner wall of the collection ring wall.

[0011] Preferably, one air inlet pipe is fixedly connected to one side of the mixing pipe, the surface of the circulating cylinder is provided with an adapter port, the inner wall of the adapter port is in close contact with the outer wall of the air inlet pipe, and the outer end of the air inlet pipe is fixedly connected with an air inlet valve.

[0012] Compared with the prior art, the utility model has the advantages of the following beneficial effects:

[0013] Through the setting of the outwardly extending collection ring wall and the recovery hole, the overflowing and insufficiently combusted flue gas is guided into the space between the circulating cylinder and the mixing pipe, and through the setting of the recovery outer wall and the guide inner ring, the insufficiently combusted flue gas is guided into the mixing pipe and is fully mixed with air before being combusted, so that the combustion of the nitrogen-containing gas is more sufficient, the content of the nitrogen-containing compound in the waste gas is reduced, and the pollution of the waste gas to the environment is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is an isometric view of the utility model;

[0015] Figure 2 It is a structure schematic view of the gas mixing device of the utility model;

[0016] Figure 3 It is a structure schematic view of the waste gas recovery outer pipe of the utility model;

[0017] Figure 4The utility model discloses an air intake device structure schematic view.

[0018] Figure 5 The utility model discloses an air intake device side view section schematic view.

[0019] In the drawing: 101, air inlet pipe;102, air inlet valve;103, link ring;104, ignition device;105, mixing pipe;201, circulating cylinder;202, recovery hole;203, collection ring wall;204, link interface;301, guide outer wall;302, air injection fan;303, air passage support;304, air extraction motor;305, air guide inner wall;306, support seat;307, recovery outer wall;308, air extraction pipe;309, guide inner ring. DETAILED DESCRIPTION

[0020] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0021] In the description of the utility model, it needs to be explained that the orientation or position relation indicated by the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "another end" and the like is the orientation or position relation shown in the drawing, and is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element being indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore can not be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and can not be understood as indicative or suggestive of relative importance.

[0022] In the description of the utility model, it needs to be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integrally connected;Can be mechanical connection, can also be electrical connection;Can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0023] Please refer to Figures 1-4 The utility model provides a technical scheme:

[0024] The split low-nitrogen combustor of a boiler comprises a support seat 306, a ring of guide outer wall 301 fixedly connected to the top side of the support seat 306, a ring of circulating cylinder 201 fixedly connected to one side of the guide outer wall 301, a ring of collection ring wall 203 fixedly connected between the inner wall of the end of the circulating cylinder 201 away from the support seat 306, a plurality of recycling holes 202 evenly distributed on the surface of the collection ring wall 203, and a ring of mixing pipe 105 fixedly connected between the inner walls of the recycling holes 202. In this embodiment, the air mixed with gas flows out through the mixing pipe 105, and part of the air flows into the circulating cylinder 201.

[0025] One end of the mixing pipe 105 towards the support seat 306 is fixedly connected to a ring of air guide inner wall 305, an air injection fan 302 is arranged between the inner walls of the air guide inner wall 305, one layer of air passage support 303 is fixedly connected between the inner walls of the two ends of the air guide inner wall 305, a rotating shaft is rotatably connected to the inner wall of the side of the air passage support 303 towards the mixing pipe 105, the outer edge of the rotating shaft is fixedly connected to the inner wall of the air injection fan 302, an air extraction motor 304 is arranged at the end of the rotating shaft away from the corresponding air passage support 303, and the side of the air injection fan 302 away from the air extraction motor 304 is fixedly connected to the surface of the other air passage support 303. One side of the guide outer wall 301 away from the mixing pipe 105 is fixedly connected to a ring of recycling outer wall 307, one ring of guide inner ring 309 is fixedly connected to the inner side of the recycling outer wall 307, one ring of air extraction pipe 308 is fixedly connected to the side of the recycling outer wall 307 away from the mixing pipe 105, and the inner wall of the air extraction pipe 308 and the inner surface of the guide inner ring 309 are smoothly connected. In this embodiment, the air extraction motor 304 extracts external air through the air extraction pipe 308.

[0026] The side of the guide inner ring 309 towards the air passage support 303 is in contact with the surface of the corresponding air passage support 303, a plurality of air passage holes are arranged on the surface of each of the two air passage supports 303, the inner and outer side edges of the side where the guide inner ring 309 and the air passage support 303 are connected and the adjacent inner walls of the adjacent two rings of air passage holes are flush. The exhaust gas flowing into the circulating cylinder 201 also enters the mixing pipe 105 through the corresponding air passage support 303. One end of the mixing pipe 105 away from the guide outer wall 301 is fixedly connected to a ring of connection ring 103, the outer edge of the connection ring 103 is connected to the inner wall of the collection ring wall 203. One side of the connection ring 103 is provided with an ignition device 104, which is generally an electric spark, for igniting gas.

[0027] One side of the mixing pipe 105 is fixedly connected to an air inlet pipe 101, an air connection port 204 is arranged on the surface of the circulating cylinder 201, the inner wall of the air connection port 204 is tightly attached to the outer wall of the air inlet pipe 101, and an air inlet valve 102 is fixedly connected to the outer end of the air inlet pipe 101. In this embodiment, the air inlet valve 102 is generally connected to a gas supply pipeline to inject nitrogen-containing gas.

[0028] It should be noted that the utility model is a kind of split type low-nitrogen combustor of boiler, reaches the following technical effect: by the setting of the collection ring wall 203 of outside extension and recovery hole 202, the unburnt flue gas of overflow is guided between circulating cylinder 201 and mixing pipe 105, and by the setting of recovery outer wall 307 and guide inner ring 309, the unburnt flue gas is guided into mixing pipe 105 and burns after being mixed with air sufficiently, so that the combustion of nitrogen-containing gas is more sufficient, the content of nitrogen-containing compound in waste gas is reduced, and the pollution of waste gas to environment is reduced.

[0029] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended examples and their equivalents.

Claims

1. A split low NOx burner for a boiler comprising a support (306) characterised in that: The top side of the support (306) is fixedly connected with a ring of guide outer wall (301), one side of the guide outer wall (301) is fixedly connected with a ring of circulating cylinder (201), the inner wall of the end of the circulating cylinder (201) away from the support (306) is fixedly connected with a ring of collection ring wall (203), the surface of the collection ring wall (203) is provided with a plurality of uniformly distributed recycling holes (202), the inner wall of the recycling hole (202) is fixedly connected with a ring of mixing pipe (105), one end of the mixing pipe (105) away from the support (306) is fixedly connected with a ring of air guide inner wall (305), the inner wall of the air guide inner wall (305) is provided with an air injection fan (302).

2. The split low NOx combustor of claim 1, wherein: The inner wall of both ends of the air guide inner wall (305) is fixedly connected with a layer of ventilation support (303) respectively, the inner wall of the air guide inner wall (305) is rotatably connected with a rotating shaft, the outer edge of the rotating shaft is fixedly connected with the inner wall of the air injection fan (302), one end of the rotating shaft away from the corresponding ventilation support (303) is provided with an air extraction motor (304), the side of the air extraction motor (304) away from the air injection fan (302) and the surface of the other ventilation support (303) are fixedly connected.

3. A split low NOx combustor for a boiler according to claim 2, characterized in that: The side of the guide outer wall (301) away from the mixing pipe (105) is fixedly connected with a ring of recycling outer wall (307), the inner side of the recycling outer wall (307) is fixedly connected with a ring of guide inner ring (309), the side of the recycling outer wall (307) away from the mixing pipe (105) is fixedly connected with a ring of air extraction pipe (308), the inner wall of the air extraction pipe (308) and the inner surface of the guide inner ring (309) are smoothly transitioned.

4. The split low NOx combustor of claim 3, wherein: The side of the guide inner ring (309) toward the ventilation support (303) is in contact with the surface of the corresponding ventilation support (303), the surface of the two ventilation supports (303) is provided with a plurality of uniformly distributed ventilation holes, the inner and outer side edges of the side of the guide inner ring (309) and the ventilation support (303) and the adjacent inner walls of the adjacent two rings of ventilation holes are flush.

5. The split low NOx combustor of a boiler according to claim 1, characterized in that: One end of the mixing pipe (105) away from the guide outer wall (301) is fixedly connected with a ring of linking ring (103), the outer edge of the linking ring (103) is connected with the inner wall of the collection ring wall (203).

6. The split low NOx combustor of a boiler according to claim 1, characterized in that: One side of the mixing pipe (105) is fixedly connected with an air inlet pipe (101), the surface of the circulating cylinder (201) is provided with a linking port (204), the inner wall of the linking port (204) is tightly attached with the outer wall of the air inlet pipe (101), the outer end of the air inlet pipe (101) is fixedly connected with an air inlet valve (102).

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