[특허]Centering plate for burner

ExxonMobil Chemical Patents Inc.

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특허 상세정보

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내보내기 페이스북 공유 트위터 공유 카카오톡 공유

Centering plate for burner

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F23M-003/00
미국특허분류(USC)	431/009; 431/115
출원번호	US-0389549 (2003-03-14)
발명자 / 주소	Spicer, David B.
출원인 / 주소	ExxonMobil Chemical Patents Inc.
인용정보	피인용 횟수 : 3 인용 특허 : 60

초록
▼

A burner for use in furnaces such as in steam cracking. The burner includes a burner tube having a downstream end and an upstream end. A burner tip is mounted on the burner tube adjacent a first opening in the furnace, so that combustion of the fuel takes place downstream of the burner tip. A fuel orifice located adjacent the upstream end of the burner tube is included for introducing fuel into the burner tube. The burner may also include at least one passageway for supplying flue gas from the furnace into a primary air chamber. The burner also has a structure responsive to an inspirating effect created by uncombusted fuel exiting the fuel orifice for drawing flue gas from the furnace through the passageway and the primary air chamber. The burner also includes a plate for centering the fuel orifice with the burner tube, the centering plate being perforated to permit flow therethrough.

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1. A burner for the combustion of fuel, said burner being located adjacent a first opening in a furnace, said burner comprising:(a) a primary air chamber having a roof; (b) a burner tube including a downstream end and an upstream end, a burner tip adjacent the first opening in the furnace, so that combustion of the fuel gas takes place downstream of said burner tip; (c) a fuel orifice located adjacent the upstream end of said burner tube, for introducing fuel into said burner tube, said fuel orifice being located on a riser; and (d) a fixed plate for centering said fuel orifice in alignment with said burner tube, said centering plate suspended from said roof of said primary air chamber and positioned substantially parallel thereto, said centering plate perforated to permit flow therethrough from said primary air chamber. 2. The burner according to claim 1 wherein said burner is a pre-mix burner.3. The burner according to claim 1 wherein said burner is a flat-flame burner.4. The burner according to claim 1 wherein said burner tip is mounted on the downstream end of said burner tube.5. The burner according to claim 1 wherein said upstream end of said burner tube is in fluid communication with said primary air chamber and the fuel.6. The burner according to claim 1 wherein said fuel comprises fuel gas.7. The burner according to claim 1 wherein said fuel orifice is located within a gas spud.8. The burner according to claim 1, further comprising:(a) at least one passageway for supplying flue gas from the furnace into said primary air chamber; and (b) means for drawing flue gas from the furnace through said at least one passageway and said primary air chamber in response to an inspirating effect of uncombusted fuel gas exiting the fuel orifice, said uncombusted fuel gas flowing through said burner tube from its upstream end towards its downstream end, whereby the flue gas is mixed with air at said upstream end of said burner tube prior to the zone of combustion of the fuel gas. 9. The burner according to claim 8 wherein said fuel orifice is located within a gas spud.10. The burner according to claim 8 wherein each of said at least one passageways is internal to the burner.11. The burner according to claim 8 wherein each of said at least one passageway is at least partially external to the furnace.12. The burner according to claim 8 wherein each of said at least one passageways has a first end at a second opening in the furnace and a second end opening into said primary air chamber, said primary air chamber being in fluid communication with the upstream end of said burner tube.13. The burner according to claim 8, wherein said means for drawing flue gas from said furnace comprises a venturi portion in said burner tube.14. The burner according to claim 8, wherein said means for drawing flue gas further comprises a first adjustable damper opening in fluid communication with said primary air chamber and a source of air.15. The burner according to claim 14, wherein said first adjustable damper opening is effective to restrict the amount of air entering into said primary air chamber and thereby providing a vacuum to draw flue gas from the furnace.16. The burner according to claim 8, further comprising a secondary air chamber, and a second adjustable damper opening into said secondary air chamber to restrict the amount of air entering into said secondary air chamber, said secondary air chamber being in fluid communication with at least one air opening into the furnace.17. The burner according to claim 16, wherein said secondary air chamber is in fluid communication with a plurality of said air openings.18. The burner according to claim 17, wherein said centering plate has an outer ring member, an inner centering member and a plurality of radially extending spokes connecting said outer ring member and said inner centering member.19. The burner according to claim 18, wherein said outer ring member fixedly secures said centering plate within said primary air chamber, and wherein said gas riser extends through said inner centering member and is supported therein.20. The burner according to claim 19, wherein said outer ring member is connected to a surface of said primary air chamber by a plurality of support members.21. The burner according to claim 1, wherein said centering plate has an outer ring member, an inner centering member and a plurality of radially extending spokes connecting said outer ring member and said inner centering member.22. The burner according to claim 21, wherein said outer ring member fixedly secures said centering plate within said primary air chamber, and wherein said gas riser extends through said inner centering member and is supported therein.23. The burner according to claim 22, wherein said outer ring member is connected to said roof of said primary air chamber by a plurality of support members.24. The burner according to claim 1, further comprising means for injecting steam into said primary air chamber.25. The burner according to claim 24, wherein said centering plate includes at least one hole for positioning at least one steam injection tube therethrough.26. A method for reducing NOx emissions in a burner for the combustion of fuel, the burner being located adjacent a first opening in a furnace and including a primary air chamber having a roof, a burner tube including a downstream end and an upstream end for receiving air from the primary air chamber and fuel, a burner tip adjacent the first opening in the furnace, so that combustion of the fuel takes place downstream of the burner tip and a fuel orifice located adjacent the upstream end of said burner tube, for introducing fuel into said burner tube, the fuel orifice being mounted on a riser; the method comprising installing a fixed plate for centering the fuel orifice in alignment with said burner tube, the centering plate suspended from the roof of the primary air chamber and positioned substantially parallel thereto, the centering plate being perforated to permit flow therethrough from the primary air chamber.27. The method according to claim 26, wherein the burner is a pre-mix burner.28. The method according to claim 26, wherein the burner is a flat-flame burner.29. The method according to claim 26, wherein the burner tip is mounted on the downstream end of said burner tube.30. The method according to claim 26, wherein the upstream end of the burner tube is in fluid communication with the primary air chamber.31. The method according to claim 26, wherein the fuel comprises fuel gas.32. The method according to claim 26, wherein the fuel orifice comprises a gas spud.33. The method according to claim 26, wherein the centering plate has an outer ring member, an inner centering member and a plurality of radially extending spokes connecting the outer ring member and said inner centering member.34. The method according to claim 33, wherein the outer ring member fixedly secures the centering plate within the primary air chamber, and wherein the gas riser extends through the inner centering member and is supported therein.35. The method according to claim 34, wherein the outer ring member is connected to the roof of the primary air chamber by a plurality of support members.36. The method according to claim 26, wherein the furnace is a steam cracking furnace.37. A method for reducing NOx emissions in a burner for the combustion of fuel, the burner being located adjacent a first opening in a furnace and including a primary air chamber having a roof, a burner tube including a downstream end and an upstream end for receiving air from said primary air chamber and fuel, a burner tip adjacent the first opening in the furnace, so that combustion of the fuel takes place downstream of the burner tip and a fuel orifice located adjacent the upstream end of said burner tube, for introducing fuel into said burner tube, the fuel orifice being mounted on a riser; the method comprising providing a fixed plate for centering the fuel orifice in alignment with said burner tube, the centering plate suspended from the roof of the primary air chamber and positioned substantially parallel thereto, the centering plate being perforated to permit flow therethrough from the primary air chamber.

이 특허에 인용된 특허 (60)

이 특허를 인용한 특허 피인용횟수: 3

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Centering plate for burner

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Centering plate for burner

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이 특허에 인용된 특허 (60)

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