EP 1873450 A2 20080102 - A method for reducing nitrogen oxide emissions of a recovery boiler, and a recovery boiler
Title (en)
A method for reducing nitrogen oxide emissions of a recovery boiler, and a recovery boiler
Title (de)
Verfahren zur Reduktion von Stickstoffoxidemissionen eines Rückgewinnungskessels und Rückgewinnungskessel
Title (fr)
Procédé de réduction d'émissions d'oxyde d'azote pour une chaudière à récupération, et chaudière à récupération
Publication
Application
Priority
FI 20065429 A 20060621
Abstract (en)
A method for reducing nitrogen oxides of a recovery boiler, and a recovery boiler, where the furnace (2) of the recovery boiler is supplied with primary air from primary air nozzles (4), black liquor from liquor nozzles (6a, 6b), secondary air from secondary air nozzles (5) above the primary air nozzles (4) but still below the liquor nozzles (6a, 6b), tertiary air from tertiary air nozzles (7) above the liquor nozzles (6a, 6b), and quaternary air from quaternary air nozzles (8) above the tertiary air nozzles (7). Black liquor is supplied to the furnace (2) from first liquor nozzles (6a) and second liquor nozzles (6b), which liquor nozzles (6a, 6b) are arranged substantially on the same level with respect to the height of the furnace (2), and the droplet size of liquor fed from the second liquor nozzles (6b) is substantially smaller than the droplet size of liquor fed from the first liquor nozzles (6a).
IPC 8 full level
CPC (source: EP FI US)
D21C 11/12 (2013.01 - FI); F23C 6/045 (2013.01 - EP US); F23G 7/04 (2013.01 - EP US); F23C 2201/101 (2013.01 - EP US); F23C 2900/06041 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
EP 1873450 A2 20080102; EP 1873450 A3 20130731; BR PI0705223 A2 20081216; CA 2592178 A1 20071221; FI 122982 B 20120928; FI 20065429 A0 20060621; FI 20065429 A 20071222; US 2007295249 A1 20071227
DOCDB simple family (application)
EP 07397020 A 20070612; BR PI0705223 A 20070621; CA 2592178 A 20070619; FI 20065429 A 20060621; US 81260007 A 20070620