EP 0430376 A3 19920115 - METHOD FOR THE COMBUSTION OF FUEL BY STEPPED FUEL FEED AND BURNER FOR USE WITH IT

Title (en)

METHOD FOR THE COMBUSTION OF FUEL BY STEPPED FUEL FEED AND BURNER FOR USE WITH IT

Publication

EP 0430376 A3 19920115 (EN)

Application

EP 90203134 A 19901127

Priority

NL 8902963 A 19891201

Abstract (en)

[origin: EP0430376A2] To lower NOx production in a stepped fuel feed combustion method, secondary fuel (15) is injected into a combustion chamber as a jet through an internal recirculation zone of the primary combustion zone (6) to a secondary combustion zone (8). The stoichiometry of the system up to and including the secondary combustion zone is preferably 0.70 to 0.90. A burner adapted for such a method is also disclosed, which has a duct for secondary fuel (15) concentrically within an inner annular duct (13) for primary fuel and an outer annular duct (14) for primary air. <IMAGE>

IPC 1-7

F23C 6/04; F23C 9/00

IPC 8 full level

F23C 6/04 (2006.01); F23C 9/00 (2006.01); F23C 99/00 (2006.01)

CPC (source: EP)

F23C 6/047 (2013.01); F23C 9/006 (2013.01); F23C 2201/20 (2013.01); F23C 2201/30 (2013.01); F23C 2202/40 (2013.01)

Citation (search report)

[YD] GB 2146113 A 19850411 - STEINMUELLER GMBH L & C
[YD] US 4265615 A 19810505 - LOHMANN ROBERT P, et al
[A] DE 3206074 A1 19830818 - KOERTING AG [DE]
[A] DE 3446788 A1 19860703 - STEINMUELLER GMBH L & C [DE]
[A] EP 0076036 A1 19830406 - ZINK CO JOHN [US]
[A] EP 0323299 A1 19890705 - GAZ DE FRANCE [FR], et al
[A] GB 2050594 A 19810107 - UNITED TECHNOLOGIES CORP
[A] PATENT ABSTRACTS OF JAPAN vol. 13, no. 100 (M-805)(3448) 9 March 1989 & JP-A-63 290 306 ( BABCOCK HITACHI ) 28 November 1988
[A] PATENT ABSTRACTS OF JAPAN vol. 6, no. 157 (M-150)(1035) 18 August 1982 & JP-A-57 074 506 ( KAWASAKI JUKOGYO ) 10 May 1982

Designated contracting state (EPC)

DE FR GB IT NL

DOCDB simple family (publication)

EP 0430376 A2 19910605; EP 0430376 A3 19920115; CA 2031228 A1 19910602; JP H03213901 A 19910919; NL 8902963 A 19910701

DOCDB simple family (application)

EP 90203134 A 19901127; CA 2031228 A 19901130; JP 33684190 A 19901130; NL 8902963 A 19891201