CN210979834U - A kind of burner - Google Patents
A kind of burner Download PDFInfo
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- CN210979834U CN210979834U CN201921641430.6U CN201921641430U CN210979834U CN 210979834 U CN210979834 U CN 210979834U CN 201921641430 U CN201921641430 U CN 201921641430U CN 210979834 U CN210979834 U CN 210979834U
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Abstract
The utility model discloses a burner, burner includes barrel, wind channel, heterotypic resistant firebrick, changming lamp, one-level fuel spray gun, second grade fuel spray gun, barrel lower part one side is provided with rather than communicating wind channel, the barrel top is provided with rather than communicating heterotypic resistant firebrick, heterotypic resistant firebrick is equipped with hollow central cavity, the resistant firebrick of changming lamp' sOne end of the secondary fuel spray gun penetrates through the bottom of the cylinder body, the other end of the secondary fuel spray gun extends into a central cavity of the special-shaped refractory brick, the secondary fuel spray gun is arranged on the outer side of the special-shaped refractory brick, at least one pair of primary fuel spray guns are arranged in the central cavity, and the primary fuel spray guns can relatively spray out fuel gas. The utility model discloses simple structure, flame stabilization and just straight strong can improve the fuel utilization efficiency of combustor, reduce NOxThe energy consumption is reduced.
Description
Technical Field
The utility model relates to a combustor technical field particularly, relates to a combustor.
Background
At present, the heating furnace in the petrochemical industry pollutes the environment, mainly N0xAnd the result is that. NO in flue gasxMainly closely related to the combustion process or the combustion mode, therefore, the problem of the pollution of the heating furnace in the petrochemical industry to the environment is solved, and mainly the problem of NO is solvedxProblem, and low NO is appliedxThe burner is the key to the problem.
NOxMainly caused by local high temperatures during combustion, in order to reduce NOxThe traditional burner respectively adopts the combustion modes of flue gas backflow, graded air supply, graded gas supply and the like to avoid local high temperature of the combustion flue gas, and the burner manufactured by utilizing the principle, NOxThe generation of (c) is controlled. However, some products have the phenomena of local overhigh temperature, unstable flame, flame drifting, insufficient combustion and the like, NOxThe discharge index is unstable, and the NO of the combustor is further controlled along with the improvement of environmental awareness of peoplexThe generation of ultra-low NO which is trending and stably burnsxIndustrial application of exhaust burners has been an urgent need.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem be the combustor burning unstable, local high temperature's problem.
In order to solve the problem, the utility model provides a burner, burner includes barrel, wind channel, heterotypic resistant firebrick, changming lamp, one-level fuel spray gun, second grade fuel spray gun, barrel lower part one side is provided with rather than communicating wind channel, the barrel top is provided with rather than communicating heterotypic resistant firebrick, heterotypic resistant firebrick is equipped with hollow center chamber, the barrel bottom is passed to the one end of changming lamp, and the other end stretches into the central intracavity of heterotypic resistant firebrick, the second grade fuel spray gun sets up in the heterotypic resistant firebrick outside, the center intracavity is provided with at least a pair of one-level fuel spray gun, fuel gas can be erupted.
The first-stage fuel spray gun is used for protecting the gun head from being influenced by the high temperature of opposite flame, meanwhile, fuel gas sprayed during opposite spraying is intersected with air ascending from the lower part, a backflow area is formed above the fuel gas, and the fuel gas floats upwards along with the air and is uniformly mixed with the backflow air in the backflow area to form stable flame.
Furthermore, at least one flue gas backflow hole is formed in the side wall of the upper half portion of the special-shaped refractory brick, and the flue gas backflow hole is close to the first-stage fuel spray gun.
When the primary fuel spray gun sprays fuel gas, a negative pressure area can be formed around the gun head, the inert flue gas outside the special-shaped refractory brick can be introduced into a part of the central cavity through the flue gas backflow hole in the negative pressure area, so that the combustion temperature of the primary fuel in the central cavity is reduced, and NO is reducedxAnd (4) generating.
Furthermore, the upper half part of the special-shaped refractory brick is inwards inclined to form an inner fuel gas attachment surface and an outer fuel gas attachment surface, and a convex edge is arranged between the inner fuel gas attachment surface and the central cavity.
The inner combustion gas attachment surface can enable the flame to attach to the wall to burn upwards, so that the flame ignites secondary fuel gas rising along with the outer combustion gas attachment surface on the top of the special-shaped refractory brick, the flame is uniformly distributed, the flame height can be reduced, the flue gas burning time is more sufficient, the burning efficiency is higher, more uniform fire field temperature is obtained, and the consumption of the fuel gas is saved.
Furthermore, the first-stage fuel spray guns are arranged in pairs along the convex edge line, and are provided with opposite-impact nozzles for oppositely spraying fuel gas.
The nozzle is favorable for forming a backflow area so as to obtain a better gas mixing effect and contribute to stable combustion of flame, the opposite-impact nozzle is arranged oppositely, the gun head can be protected from being influenced by high temperature of the opposite flame, meanwhile, inert flue gas introduced from the negative pressure area can further reduce the temperature around the gun head, and the service life of the gun head can be prolonged.
Furthermore, the offset nozzle is slightly higher than the convex edge, and the fuel gas sprayed by the offset nozzle forms an included angle of 0-60 degrees with the side line of the convex edge in the horizontal direction.
The included angle between the sprayed fuel gas and the convex edge line is 0-60 degrees, so that the fuel gas can be upwards combusted along the inner gas attachment surface after being sprayed, and the fuel gas sprayed upwards in an inclined mode is ignited.
Furthermore, the first-stage fuel spray gun is also provided with a first inclined spray nozzle for spraying fuel gas obliquely upwards along the parallel direction of the inner gas attachment surface.
The fuel gas sprayed by the first inclined nozzle can be ignited by stable flame sprayed by the horizontal nozzle at the lower part of the first inclined nozzle, and then the secondary fuel gas which rises to the top of the special-shaped refractory brick along the outer fuel gas attachment surface is ignited after the secondary fuel gas upwards faces along the inner fuel gas attachment surface of the special-shaped refractory brick.
Furthermore, a plurality of mounting grooves are formed in the outer portion of one side, in the opposite jetting direction, of the lower half portion of the special-shaped refractory brick and the first-stage fuel spray gun, and the mounting grooves are used for mounting the second-stage fuel spray gun.
The secondary fuel spray gun is used for stably spraying secondary fuel gas.
Furthermore, the secondary fuel spray gun is provided with a plurality of second inclined nozzles which obliquely spray the fuel gas to the outer fuel gas attachment surface, and a plurality of third inclined nozzles which are used for parallelly and upwardly spraying the fuel gas along the outer fuel gas attachment surface.
The secondary fuel gas sprayed out of the second inclined nozzle can be attached to the outer fuel gas attachment surface and move upwards, and is ignited by the fuel gas sprayed out of the first inclined nozzle which is burnt at the outlet of the special-shaped refractory brick, and further the secondary fuel gas sprayed out of the third inclined nozzle is ignited.
Furthermore, the third oblique nozzle is larger than the second oblique nozzle.
The second inclined nozzle sprays gas to play a stable ignition role, and the third inclined nozzle sprays secondary fuel gas parallel to the outer fuel gas attachment surface and serves as main fuel of the combustor, so that the gas consumption is large, and a large nozzle is required.
Furthermore, the flue gas recovery hole is in a horn shape, one side of the flue gas recovery hole close to the central cavity is enlarged, the two sides of the flue gas recovery hole are arc-shaped, and the upper portion and the lower portion of the flue gas recovery hole are planes.
Flue gas backward flow hole is close to central cavity one side grow, is favorable to the flue gas of introducing to diffuse to central cavity rapidly, and the homogeneous reduction of the one-level fuel combustion temperature of central cavity of being convenient for avoids appearing local high point.
Compared with the prior art, the utility model has the advantages of as follows: the utility model provides a combustor, adopt fuel classification technique, one-level fuel spray gun to spouting through the central cavity, can protect the rifle head to avoid the influence of opposite spray gun high temperature, simultaneously because the effect of backward flow district, make air and one-level fuel gas homogeneous mixing, can form and stabilize ascending flame and attach to the gas ignition on the wall with internal gas, set up slant nozzle one simultaneously on one-level fuel spray gun, spun one-level fuel gas burns upwards along the internal fuel cavity, the stable second grade fuel gas of lighting on the export of abnormal shape resistant firebrick, ensure that it is abundant, stable burning, in addition, through the setting of flue gas backward flow hole on the abnormal shape resistant firebrick wall, negative pressure zone around the cooperation one-level fuel spray gun rifle head, can introduce some inert flue gas, a temperature for reducing the central cavity, effectively reduce No, stable burningxAnd (4) generating. The utility model discloses simple structure, flame stabilization and just straight strong can improve the fuel utilization efficiency of combustor, reduce NOxThe energy consumption is reduced.
Drawings
Fig. 1 is a schematic view of the overall structure of a burner according to an embodiment of the present invention;
FIG. 2 is a top view of a burner according to an embodiment of the present invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic structural diagram of a profiled refractory brick;
FIG. 5 is a schematic structural view of a head of a first-stage fuel spray gun;
FIG. 6 is a schematic structural diagram of a head of a secondary fuel lance.
Description of reference numerals:
1. a barrel; 2. an air duct; 3. special-shaped refractory bricks; 301. a central lumen; 302. a flue gas recirculation hole; 303. an inner gas attachment surface; 304. an outer gas attachment surface; 305. a convex edge; 306. mounting grooves; 4. a beacon light; 5. a primary fuel spray gun; 501. oppositely punching a nozzle; 502. a first inclined nozzle; 6. a secondary fuel spray gun; 601. a second inclined nozzle; 602. and a third inclined nozzle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The specific embodiments described herein are merely illustrative of the invention and are not intended to be limiting of the invention.
A burner according to an embodiment of the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
The embodiment provides a burner, as shown in fig. 1, the burner includes a cylinder 1, an air duct 2, a special-shaped firebrick 3, an incandescent lamp 4, a first-stage fuel spray gun 5, a second-stage fuel spray gun 6, and an installation flange 7, the air duct 2 communicated with the cylinder 1 is arranged on one side of the lower portion of the cylinder 1, the special-shaped firebrick 3 communicated with the cylinder 1 is arranged on the installation flange 7 on the top of the cylinder 1, the special-shaped firebrick 3 is provided with a hollow central cavity 301, one end of the incandescent lamp 4 penetrates through the bottom of the cylinder 1, the other end of the incandescent lamp extends into the central cavity 301 of the special-shaped firebrick 3, the second-stage fuel spray gun 6 is arranged outside the special-shaped firebrick 3, at least one pair of first. In the present embodiment, the primary fuel lances 5 are in two pairs.
The first-stage fuel spray gun 5 is used for protecting the gun head from being influenced by the high temperature of opposite flame, meanwhile, fuel gas sprayed during spraying is intersected with air ascending from the lower part, a backflow area is formed above the fuel gas, and the sprayed fuel gas floats upwards along with the air and is uniformly mixed with the backflow air in the backflow area to form stable flame.
As shown in fig. 2-4, the special-shaped refractory brick 3 is a rectangular parallelepiped structure, the upper half portion of the special-shaped refractory brick is inclined inward to form an inner gas attachment surface 303 and an outer gas attachment surface 304, a convex edge 305 is provided between the inner gas attachment surface 303 and the central cavity 301, the inner gas attachment surface 303 can enable the flame to attach to the wall and burn upward, the flame ignites secondary fuel gas rising along with the outer gas attachment surface 304 on the top of the special-shaped refractory brick 3, so that the flame is distributed uniformly, the height of the flame can be reduced, the combustion time of the flue gas is more sufficient, the combustion efficiency is higher, a more uniform fire field temperature is obtained, and the consumption of the fuel gas is reduced.
The first-stage fuel spray guns 5 are arranged in pairs along the side line of the convex edge 305, the offset nozzles 501 for horizontally spraying fuel gas are arranged on the first-stage fuel spray guns, the offset nozzles 501 of each pair of the first-stage fuel spray guns 5 are oppositely arranged, the offset nozzles 501 are slightly higher than the convex edge 305, the fuel gas sprayed by the offset nozzles 501 is parallel to the side line of the convex edge 305, namely, the included angle is 0 degree, at least one smoke backflow hole 302 is arranged on the side wall of the upper half part of the special-shaped refractory brick 3, and the smoke backflow hole 302 is arranged close to the first-stage fuel spray guns 5.
When the primary fuel spray gun 5 sprays fuel gas, a negative pressure zone is formed around the gun head, part of inert flue gas outside the special-shaped refractory brick 3 can be introduced into the central cavity 301 through the flue gas backflow hole 302 in the negative pressure zone, the inert flue gas can reduce the combustion temperature of primary fuel in the central cavity 301, and reduce NOxThe oppositely charged airflow is driven upwards by air, the gun head can be protected from the high temperature of the opposite flame, and meanwhile, the inert smoke introduced by the negative pressure zone can be further reducedThe temperature around the lance tip helps to extend its useful life.
In this embodiment, the primary fuel spray guns 5 are disposed at four corners of the boundary between the convex edge 305 and the inner combustion gas attachment surface 303, the opposite-impact nozzles 501 of the primary fuel spray guns 5 are disposed opposite to each other along the long edge of the inner combustion gas attachment surface 303, the primary fuel gas oppositely sprayed by the opposite-impact nozzles 501 forms a stable flame above the convex edge 305 along the length direction of the convex edge 305, and the flame burns upward at the center position of the opposite-impact. The parallel arrangement of the projected fuel gas with the side of the ledge 305 may cause the fuel gas to burn upward against the gas attachment surface 303 at the trailing edge for igniting the fuel gas that is projected obliquely upward.
In this embodiment, the number of the flue gas recirculation holes 302 is 2, the flue gas recirculation holes are respectively arranged on the short sides of the upper half part of the special-shaped refractory brick 3, the flue gas recirculation holes 302 are flat and horn-shaped, the two sides of the flue gas recirculation holes are arc-shaped, the side close to the inner gas attachment surface 303 is enlarged, and the upper and lower parts of the flue gas recirculation holes 302 are planes. Flue gas backward flow hole 302 is close to central cavity 301 one side grow, is favorable to the flue gas of introducing to diffuse to central cavity 301 fast, and the homogeneous reduction of the one-level fuel combustion temperature of central cavity 301 of being convenient for avoids appearing local high point.
As shown in fig. 5, the primary fuel injection lance 5 is further provided with a first inclined nozzle 502 for injecting fuel gas obliquely upward in a direction parallel to the inner gas attachment surface 303. The fuel gas sprayed from the first inclined nozzle 502 can be ignited by the stable flame of the fuel gas sprayed from the lower horizontal nozzle 501, and then the secondary fuel gas rises to the top of the special-shaped refractory bricks 3 along the outer fuel gas attachment surface 304 after going upward along the inner fuel gas attachment surface 303 of the special-shaped refractory bricks 3.
As shown in FIG. 4, the outer part of the lower half part of the profiled refractory brick 3 on the same side as the opposite injection direction of the primary fuel spray gun 5 is provided with a plurality of mounting grooves 306, and the mounting grooves 306 are used for mounting the secondary fuel spray gun 6. In this embodiment, there are 6 installation grooves 306, there are 3 on each long side of the shaped firebrick 3, and correspondingly, there are 3 secondary fuel spray guns 6 on each side.
As shown in fig. 6, the secondary fuel spray gun 6 is provided with a plurality of second inclined nozzles 601 for obliquely spraying fuel gas to the outer fuel gas attachment surface 304, and is further provided with a plurality of third inclined nozzles 602 for parallelly and upwardly spraying fuel gas along the inner fuel gas attachment surface 303, wherein the third inclined nozzles 602 are larger than the second inclined nozzles 601. The secondary fuel gas discharged from the second inclined nozzle 601 can move upward while adhering to the outer fuel gas adhering surface 304, and is ignited by the fuel gas discharged from the first burning inclined nozzle 502 at the outlet of the special-shaped refractory brick 3, and further, the secondary fuel gas discharged from the third inclined nozzle 602 is ignited. The second inclined nozzle 601 sprays gas to play a stable ignition role, and the third inclined nozzle 602 sprays secondary fuel gas parallel to the outer fuel gas attachment surface 304, and the secondary fuel gas is used as main fuel of the combustor, so that the gas consumption is large, and a large nozzle is needed.
Example 2
This embodiment provides a burner, which has the same overall structure as that of embodiment 1, except that the fuel gas ejected from the opposed nozzle 501 forms an angle of 30 degrees with the convex edge 305 in the horizontal direction, and the fuel gas ejected from the paired primary fuel injection lances 5 are opposed to each other at the upper part of the central cavity 301 to form a stable ascending flame which burns upward along the inner combustion gas adhesion surface 303 and ignites the fuel gas ejected obliquely upward.
Example 3
This embodiment provides a burner, which has the same overall structure as that of embodiment 1, except that the fuel gas ejected from the opposed nozzle 501 forms an angle of 60 degrees with the convex edge 305 in the horizontal direction, and the fuel gas ejected from the paired primary fuel injection lances 5 are opposed to each other at the upper part of the central cavity 301 to form a stable ascending flame which burns upward along the inner combustion gas adhesion surface 303 and ignites the fuel gas ejected obliquely upward.
The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above only are embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a combustor, includes barrel (1), wind channel (2), heterotypic resistant firebrick (3), beacon (4), one-level fuel spray gun (5), second grade fuel spray gun (6), its characterized in that, barrel (1) lower part one side is provided with rather than communicating wind channel (2), barrel (1) top is provided with rather than communicating heterotypic resistant firebrick (3), heterotypic resistant firebrick (3) are equipped with hollow center chamber (301), the one end of beacon (4) is passed barrel (1) bottom, and the other end stretches into in the center chamber (301) of heterotypic resistant firebrick (3), second grade fuel spray gun (6) set up in heterotypic resistant firebrick (3) outside, be provided with at least a pair of one-level fuel spray gun (5) in center chamber (301), fuel gas can be erupted relatively in one-level fuel spray gun.
2. A burner as claimed in claim 1, characterised in that said profiled refractory brick (3) is provided, on the upper half of its lateral wall, with at least one flue gas recirculation hole (302), said flue gas recirculation hole (302) being provided close to the primary fuel lances (5).
3. A burner as claimed in claim 2, characterised in that the upper half of said profiled refractory bricks (3) is inclined inwards to form an inner gas attachment surface (303) and an outer gas attachment surface (304), said inner gas attachment surface (303) and the central cavity (301) having a ledge (305) therebetween.
4. A burner as claimed in claim 3, characterised in that said primary fuel lances (5) are arranged in pairs along the side of the ledge (305) and are provided with opposed nozzles (501) for the opposed injection of fuel gas.
5. A burner as in claim 4, wherein said counter-jet nozzle (501) is positioned slightly higher than the convex edge (305), and said counter-jet nozzle (501) emits fuel gas at an angle of 0-60 degrees horizontally to the side line of the convex edge (305).
6. A burner as in claim 5, wherein said primary fuel injection lance (5) is further provided with a first angled nozzle (502) for injecting fuel gas obliquely upward parallel to the inner gas attachment surface (303).
7. A burner as claimed in claim 6, characterized in that the outer part of the lower half of said profiled refractory brick (3) on the side coinciding with the direction of injection of the opposed jet nozzles (501) is provided with a plurality of mounting grooves (306), said mounting grooves (306) being used for mounting secondary fuel lances (6).
8. A burner as claimed in claim 7, wherein said secondary fuel lance (6) is provided with a plurality of second angled nozzles (601) angled towards the outer gas attachment surface (304) and a plurality of third angled nozzles (602) for injecting fuel gas parallel upwards along the inner gas attachment surface (303).
9. A burner as in claim 8, wherein said angled jet three (602) is larger in diameter than said angled jet two (601).
10. A burner as in claim 9, wherein said flue gas recirculation holes (302) are flared and enlarged on the side close to the central chamber (301), with both sides in the shape of circular arcs and the upper and lower portions being flat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921641430.6U CN210979834U (en) | 2019-09-29 | 2019-09-29 | A kind of burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921641430.6U CN210979834U (en) | 2019-09-29 | 2019-09-29 | A kind of burner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210979834U true CN210979834U (en) | 2020-07-10 |
Family
ID=71420047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921641430.6U Active CN210979834U (en) | 2019-09-29 | 2019-09-29 | A kind of burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210979834U (en) |
-
2019
- 2019-09-29 CN CN201921641430.6U patent/CN210979834U/en active Active
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