An improved burner and a method for combusting fuel in burners used in furnaces such as those found in steam cracking. The burner includes a burner tube having a downstream end and an upstream end for receiving fuel and air, flue gas or mixtures thereof, a fuel orifice located adjacent the upstream
An improved burner and a method for combusting fuel in burners used in furnaces such as those found in steam cracking. The burner includes a burner tube having a downstream end and an upstream end for receiving fuel and air, flue gas or mixtures thereof, a fuel orifice located adjacent the upstream end of the burner tube, for introducing fuel into the burner tube, a burner tip mounted on the downstream end of the burner tube and adjacent a first opening in the furnace, the burner tip having a plurality of air flow notches positioned about an outer periphery thereof, a peripheral tile surrounding the outer periphery of the burner tip, forming the first opening in the furnace, and a burner tip seal in contact with at least a portion of the outer periphery of the burner tip and the peripheral tile, wherein a plurality of air gaps is formed between an inner periphery of the burner tip seal and the air flow notches, the plurality of air gaps effective for providing a portion of the air for combustion.
대표청구항▼
1. A burner for the combustion of fuel in a furnace, said burner comprising:(a) a burner tube having a downstream end and an upstream end for receiving fuel and air, flue gas or mixtures thereof; (b) a fuel orifice located adjacent the upstream end of said burner tube, for introducing fuel into said
1. A burner for the combustion of fuel in a furnace, said burner comprising:(a) a burner tube having a downstream end and an upstream end for receiving fuel and air, flue gas or mixtures thereof; (b) a fuel orifice located adjacent the upstream end of said burner tube, for introducing fuel into said burner tube; (c) a burner tip mounted on the downstream end of said burner tube and adjacent a first opening in the furnace, said burner tip having a plurality of air flow notches positioned about an outer periphery thereof; (d) a peripheral tile surrounding said outer periphery of said burner tip, forming said first opening in the furnace; and (e) a burner tip seal in contact with at least a portion of said outer periphery of said burner tip and said peripheral tile; wherein a plurality of air gaps is formed between an inner periphery of said burner tip seal and said air flow notches, said plurality of air gaps effective for providing a portion of the air for combustion. 2. The burner of claim 1, wherein said burner tip seal comprises a burner tip band, said burner tip band comprised of steel, metal or metal composites capable of withstanding the harsh environment of an industrial burner.3. The burner of claim 2, wherein said burner tip band is comprised of steel.4. The burner of claim 2, further comprising a compressible high temperature material positioned about an outer periphery of said burner tip band, wherein said compressible material is in sealing engagement with said peripheral tile.5. The burner of claim 4, wherein said burner tip band further comprises a peripheral indentation for seating said compressible high temperature material.6. The burner of claim 4, wherein said compressible high temperature material expands when heated.7. The burner of claim 6, wherein said compressible high temperature material is produced from mullite fiber.8. The burner of claim 4, wherein said compressible high temperature material has a maximum temperature rating of 2900° F. and a continuous use limit of up to 2700° F.9. The burner of claim 1, wherein the fuel orifice is located within a gas spud located adjacent the upstream end of said burner tube, for introducing fuel gas into said burner tube.10. The burner of claim 1, wherein the fuel is fuel gas and said burner tip has a plurality of main ports and a plurality of peripherally arranged side ports.11. The burner of claim 1, further comprising at least one steam injection tube for injecting steam upstream of said burner tube.12. The burner of claim 1, wherein said burner is a flat-flame burner.13. The burner of claim 1, wherein said burner is a pre-mix burner.14. A method for combusting fuel in a burner installed in a furnace, comprising the steps of:(a) combining fuel and air, flue gas or mixtures thereof at a predetermined location adjacent a fuel orifice; (b) passing the fuel and air, flue gas or mixtures thereof through a burner tube; (c) discharging the fuel gas and air, flue gas or mixtures thereof at a burner tip downstream of the predetermined location, the burner tip having a plurality of air flow notches positioned about an outer periphery thereof, the burner tip peripherally surrounded by a peripheral tile; and (d) sealing the outer periphery of the burner tip with a burner tip seal, the burner tip seal in sealing engagement with at least a portion of the outer periphery of the burner tip and the peripheral tile; (e) combusting said fuel gas downstream of the burner tip downstream of said predetermined location; wherein a plurality of air gaps are formed between an inner periphery of the burner tip seal and the air flow notches, the plurality of air gaps effective for providing a portion of the air for combustion. 15. The method of claim 14, wherein the burner tip seal comprises a burner tip band, the burner tip band comprised of steel, metal or metal composites capable of withstanding the harsh environment of an industrial burner.16. The method of claim 15, wherein the burner tip band is comprised of steel.17. The method of claim 15, further comprising the step of further sealing the outer periphery of the burner tip with a compressible high temperature material positioned about an outer periphery of the burner tip band, wherein the compressible material is in sealing engagement with the peripheral tile.18. The method of claim 17, wherein the burner tip band further comprises a peripheral indentation for seating the compressible high temperature material.19. The method of claim 17, wherein the compressible high temperature material expands when heated.20. The method of claim 17, wherein the compressible high temperature material is produced from mullite fiber.21. The method of claim 17, wherein the compressible high temperature material has a maximum temperature rating of 2900° F. and a continuous use limit of up to 2700° F.22. The method of claim 14, wherein the fuel orifice is located within a gas spud for introducing fuel gas into the burner tube.23. The method according to claim 14, further comprising the step of drawing a stream of flue gas from the furnace.24. The method according to claim 23, wherein the stream of flue gas drawn from the furnace is drawn in response to the inspirating effect of uncombusted fuel gas exiting the fuel orifice and flowing towards said combustion zone.25. The method according to claim 23, wherein said drawing step includes passing the fuel gas and air, flue gas or mixtures thereof; through a venturi, whereby the inspirating effect of the uncombusted fuel gas exiting the fuel orifice and flowing through said venturi draws the flue gas into the venturi.26. The method of claim 14, further comprising the step of injecting steam upstream of the burner tube.27. The method according to claim 14, wherein the burner is a pre-mix burner.28. The method according to claim 14, wherein the burner is a flat-flame burner.29. The method according to claim 14, wherein the burner is installed in a steam-cracking furnace.
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