Environment-friendly burner for cracking furnace

Abstract

The environment-friendly burner for the cracking furnace comprises a burner box body assembly, an empennage burner block, an external spray gun and an incandescent light, the external spray gun comprises a plurality of branch air guns, the top of the empennage burner block is provided with an ignition inclined face, and ignition holes are evenly distributed in the circumferential direction of the ignition inclined face. Guiding tail wings are further evenly distributed in the circumferential direction of the ignition inclined face, the two adjacent guiding tail wings and the ignition inclined face form a combustion guiding groove, and the branch air guns correspond to the combustion guiding grooves in a one-to-one mode. All the spray guns except the incandescent light are arranged on the outer side of the burner block; part of spray holes in the spray gun on the outer side of the burner block are used for spraying to the burner block, so that the burning root flame is effectively stabilized, and meanwhile, part of flue gas is brought in during high-speed spraying; the guide empennage is arranged on the ignition slope of the burner block and can guide the injection direction of fuel gas, flame interference between the guide empennage and adjacent spray guns is avoided, and peak temperature increase caused by flame superposition is reduced. NOx generation is reduced through the triple action.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial burner technical field, concretely relates to a kind of environmental protection burners for cracking furnace, and it is applicable to chemical and coal chemical industry furnace and other industrial heating furnace. BACKGROUND

[0002] The burner of the lower part of ethylene cracking furnace is used to release heat, and provides the required heat for the cracking reaction in the furnace tube located in the upper part of the cracking furnace. However, the gas produced by combustion directly passes through the outlet of the cracking furnace to the air, often causing great pollution to the environment, so there is an urgent need to design an environmental protection burner for cracking furnace to reduce the generation of NOx from the source, thereby reducing the emission of NOx. SUMMARY

[0003] The utility model discloses a kind of environmental protection burners for cracking furnace, except that long-lasting light is arranged in burner brick, all spray guns are arranged outside burner brick;Part of the spray hole in burner brick outside spray gun is sprayed to burner brick, so that the root flame of combustion is effectively stabilized, while part of flue gas is brought in during high-speed injection;Guiding tail fin is arranged on the fire-leading slope of burner brick, which can guide the injection direction of fuel gas, avoid forming flame interference with adjacent spray gun, reduce peak temperature caused by flame superposition, reduce NOx generation by triple effect.

[0004] The utility model discloses a kind of environmental protection burners for cracking furnace, including burner box assembly, tail fin burner brick, external spray gun and long-lasting light, the burner box assembly is equipped with tail fin burner brick, the long-lasting light is inserted into tail fin burner brick, the external spray gun is arranged outside tail fin burner brick, the external spray gun includes multiple branch gas guns, the top of tail fin burner brick is equipped with fire-leading slope, the fire-leading slope is uniformly distributed with injection hole, the injection hole is inclined from outside to inside upwards, the fire-leading slope is also uniformly distributed with guiding tail fin, adjacent two guiding tail fins form combustion guide groove with fire-leading slope, the branch gas gun is one-to-one corresponding with combustion guide groove.

[0005] A kind of environmental protection burners for cracking furnace, including burner box assembly, tail fin burner brick, external spray gun and long-lasting light, the burner box assembly is equipped with tail fin burner brick, the long-lasting light is inserted into tail fin burner brick, the external spray gun is arranged outside tail fin burner brick, the external spray gun includes multiple branch gas guns, the top of tail fin burner brick is equipped with fire-leading slope, the fire-leading slope is uniformly distributed with injection hole, the injection hole is inclined from outside to inside upwards, the fire-leading slope is also uniformly distributed with guiding tail fin, adjacent two guiding tail fins form combustion guide groove with fire-leading slope, the branch gas gun is one-to-one corresponding with combustion guide groove.

[0006] Preferably, the tail fin burner brick is placed on the mounting connection plate of the burner box assembly, and the multiple branch gas guns are connected to the annular collecting pipe, which is mounted on the mounting connection plate. Each branch gas gun is provided with a branch gas gun nozzle at the top, and the branch gas gun nozzle is provided with an injection hole and a main guide hole. The injection hole is matched with the injection hole.

[0007] Preferably, the long-lasting light passes through the burner box assembly and is eccentrically inserted into the tail fin burner brick.

[0008] Preferably, a non-metallic heat insulation sleeve is provided outside the gun barrel of the branch gas gun.

[0009] The utility model discloses the beneficial effect is:

[0010] Change traditional inside and outside spray gun structure, except the setting of the ever-burning lamp in the burner brick, all spray guns are arranged on the outside of the burner brick, can better reduce the generation of thermal type NOx;

[0011] Utilize the partial spray hole in the spray gun of the burner brick outside and spray to the burner brick, thereby effectively stabilize the root flame of combustion, when high -speed injection, also can reduce the generation of NOx with the partial flue gas;

[0012] The guiding tail wing is arranged on the ignition inclined plane of the burner brick, and the guiding tail wing can guide the injection direction of fuel gas, avoid forming flame interference with adjacent spray guns, reduce the peak temperature caused by flame superposition, thereby reducing the generation of NOx;

[0013] Strengthen the air distribution, set the air deflector in the box, can effectively improve the rigidity of the flame, reduce the phenomenon of flame to extinguish the pipe, prolong the service life of the furnace pipe;

[0014] The spray gun is heat insulated, and the nonmetal heat insulation sleeve is arranged outside the gun barrel of the branch gas gun, reduces the carbon precipitation reaction caused by the long -time high -temperature radiation of hydrocarbon fuel, reduces the coking and blockage phenomenon of the spray head gun barrel, thereby improves the use cycle of the furnace. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the structure schematic view of the environmental protection combustor for the cracking furnace.

[0016] Figure 2 It is the A view of Figure 1 .

[0017] Figure 3 It is the three -dimensional schematic view of the tail wing burner brick.

[0018] Figure 4 It is the partial enlarged view of the spray hole of the spray head of the external spray gun in Figure 1 .

[0019] Wherein: combustor box assembly 1;Cylinder 1.1;Glass sight hole assembly 1.2;Air distribution mechanism 1.3;Mounting connection plate 1.4;Guide plate 1.5;Tail wing burner brick 2;Injection hole 2.1;Guiding tail wing 2.2;Combustion guide groove 2.3;External spray gun 3;Annular manifold 3.1;Branch gas gun 3.2;Branch gas gun spray head 3.3;Injection spray hole 3.4;Main guide spray hole 3.5;Ever-burning lamp 4;Ever-burning lamp nozzle 4.1;Ever-burning lamp venturi 4.2;Ever-burning lamp gas pipe 4.3;Ever-burning lamp flame stabilizer 4.4. DETAILED DESCRIPTION

[0020] See Figures 1-4The utility model relates to a kind of environment-friendly combustor for cracking furnace, including combustor box assembly 1, tail wing burner brick 2, external spray gun 3 and long lasting light 4, the combustor box assembly 1 is the main supporting component of composition combustor, the tail wing burner brick 2 is arranged on combustor box assembly 1, the combustor box assembly 1 includes cylinder 1.1, glass looks fire hole 1.2, air distribution mechanism 1.3, installation connecting plate 1.4 and guide plate 1.5, the tail wing burner brick 2 is placed on installation connecting plate 1.4, the top of the tail wing burner brick 2 is equipped with fire slope, the fire slope is uniformly distributed with injection hole 2.1, the injection hole 2.1 is inclined from outside to inside upwards, the fire slope is also uniformly distributed with guide tail wing 2.2, adjacent two guide tail wing 2.2 and fire slope form combustion guide groove 2.3.

[0021] The external spray gun 3 includes annular manifold 3.1, branch air gun 3.2 and branch air gun nozzle 3.3, the annular manifold 3.1 is installed on installation connecting plate 1.4, the annular manifold 3.1 is connected with multiple branch air guns 3.2, multiple branch air guns 3.2 are distributed outside tail wing burner brick 2, according to the principle of ready-made thermal type NOx, to reduce the contact time of high-temperature area after combustion with air, multiple branch air guns 3.2 are distributed on the outside of tail wing burner brick 2, reduce the intermediate high-temperature area, thereby reduce the generation of thermal type NOx.

[0022] The branch air gun 3.2 corresponds to the combustion guide groove 2.3, that is, each combustion guide groove 2.3 is provided with a branch air gun 3.2, the top of each branch air gun 3.2 is provided with a branch air gun nozzle 3.3, the branch air gun nozzle 3.3 is provided with injection nozzle 3.4 and main guide nozzle 3.5, the injection nozzle 3.4 is matched with injection hole 2.1, the branch air gun 3.2 is inserted from installation connecting plate 1.4, the branch air gun nozzle 3.3 at the top of branch air gun 3.2 extends into the corresponding combustion guide groove 2.3, and the injection nozzle 3.4 of branch air gun nozzle 3.3 is aligned with injection hole 2.1 on tail wing burner brick 2, and the main guide nozzle 3.5 is arranged in the combustion guide groove 2.3 of tail wing burner brick 2.

[0023] The long lasting light 4 is an important component for ignition and stable combustion, which is composed of long lasting light nozzle 4.1, venturi 4.2, long lasting light gas pipe 4.3 and long lasting light flame stabilizing cover 4.4, the long lasting light 4 passes through the combustor box assembly and extends into the middle edge position of the tail wing burner brick 2, that is, the long lasting light 4 is eccentrically arranged in the tail wing burner brick (as Figure 1 ).

[0024] Non-metal heat insulation sleeve is arranged outside the barrel of branch air gun, reduces carbon precipitation reaction due to long time high-temperature radiation of hydrocarbon fuel, reduces the coking and blocking phenomenon of nozzle barrel, thereby improves the service period of furnace.

[0025] Working principle:

[0026] First, the fuel gas is injected into the furnace at high speed from the branch gas lance nozzle 3.3 through the main guide nozzle 3.4, effectively introducing part of the flue gas in the furnace into the combustion area to realize internal circulation of the flue gas, and at the same time, the injection nozzle is injected into the inside from the injection hole opened laterally on the burner brick, and the end of the red-hot burner brick is injected, thereby realizing stable combustion while effectively reducing the generation of NOx; secondly, the guide plate in the burner box strengthens the mixing intensity of the combustion-supporting air and the fuel gas, effectively improving the flame rigidity; at the same time, the lance increases the heat insulation material, delays the coking generation time, and finally prolongs the use time of the furnace in the cycle.

[0027] In addition to the above embodiments, the utility model also includes other implementation manners, and the technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the utility model claims.

Claims

1. An environmentally friendly burner for a cracking furnace, characterized by: The burner box assembly, the tail burner brick, the external spray gun and the long-lasting lamp are included, the burner box assembly is provided with the tail burner brick, the long-lasting lamp extends into the tail burner brick, the external spray gun is arranged outside the tail burner brick, the external spray gun includes a plurality of branch gas guns, the top of the tail burner brick is provided with a fire starting slope, the fire starting slope is circumferentially uniformly distributed with injection holes, the injection holes are inclined upward from outside to inside, the fire starting slope is also circumferentially uniformly distributed with guide tails, adjacent two guide tails form a combustion guide groove with the fire starting slope, and the branch gas gun corresponds to the combustion guide groove one by one.

2. The environmentally friendly burner for a cracking furnace according to claim 1, characterized in that: The tail burner brick is placed on the mounting connecting plate of the burner box assembly, the plurality of branch gas guns are connected with the annular collecting pipe, the annular collecting pipe is mounted on the mounting connecting plate, the top of each branch gas gun is provided with a branch gas gun nozzle, the branch gas gun nozzle is provided with injection nozzles and main guide nozzles, and the injection nozzles are matched with the injection holes.

3. The environmentally friendly burner for a cracking furnace according to claim 1, characterized in that: The long-lasting lamp passes through the burner box assembly and extends into the tail burner brick eccentrically.

4. The environmentally friendly burner for a cracking furnace according to claim 1, characterized in that: A non-metal heat insulation sleeve is arranged outside the barrel of the branch gas gun.

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