Title (en)

A RECOVERY BOILER, FUEL FEEDING MEANS AND A METHOD FOR FEEDING BLACK LIQUOR AND AIR TO REDUCE NITROGEN OXIDE EMISSIONS

Title (de)

RÜCKGEWINNUNGSKESSEL, BRENNSTOFFZUFÜHRMITTEL UND VERFAHREN ZUR ZUFÜHRUNG VON SCHWARZLAUGE UND LUFT ZUR REDUZIERUNG VON STICKOXIDEMISSIONEN

Title (fr)

CHAUDIÈRE DE RÉCUPÉRATION, MOYENS D'ALIMENTATION EN COMBUSTIBLE ET PROCÉDÉ POUR INTRODUIRE UNE LIQUEUR NOIRE ET DE L'AIR, AFIN DE RÉDUIRE LES ÉMISSIONS D'OXYDE D'AZOTE

Publication

EP 3081690 A1 20161019 (EN)

Application

EP 16165107 A 20160413

Priority

FI 20155278 A 20150414

Abstract (en)

The invention relates to a recovery boiler comprising a set of black liquor feed pipes in the first combustion zone (I), and primary air nozzles below the set of black liquor feed pipes. The recovery boiler comprises an air feed channel above at least part of the length of at least one black liquor feed pipe for supplying combustion air for volatile matter into the first combustion zone (I) along with the black liquor supply in the direction of the length of the at least one black liquor feed pipe. The present invention further relates to fuel feeding means for a recovery boiler and a method for feeding black liquor and air to a recovery boiler to reduce nitrogen oxide emissions.

IPC 8 full level

D21C 11/12 (2006.01); F22B 31/04 (2006.01); F23C 7/02 (2006.01); F23G 7/04 (2006.01)

CPC (source: EP FI)

D21C 11/12 (2013.01 - EP FI); F22B 1/04 (2013.01 - EP); F22B 1/18 (2013.01 - EP); F22B 31/04 (2013.01 - FI); F22B 37/02 (2013.01 - EP); F22D 1/38 (2013.01 - EP); F23C 7/02 (2013.01 - FI); F23G 7/04 (2013.01 - EP FI); F23L 1/00 (2013.01 - EP); F22B 31/04 (2013.01 - EP)

Citation (applicant)

EP 0761871 A1 19970312 - MEAD CORP [US]

Citation (search report)

• [Y] EP 1416083 A1 20040506 - KVAERNER POWER OY [FI]
• [Y] EP 0459963 A1 19911204 - CHEMREC AB [SE]
• [Y] US 2003127030 A1 20030710 - CARDIN J PETER [US], et al
• [XY] EP 2479491 A1 20120725 - FORTUM OYJ [FI]
• [XY] EP 0452608 A2 19911023 - ENTE NAZ ENERGIA ELETTRICA [IT], et al
• [Y] EP 2574841 A2 20130403 - FORTUM OYJ [FI]
• [AD] EP 0761871 A1 19970312 - MEAD CORP [US]
• [A] EP 2022888 A1 20090211 - ANDRITZ OY [FI]
• [A] US 6186080 B1 20010213 - HINO HIROKAZU [JP], et al
• [A] US 5771817 A 19980630 - OLAUSSON LARS [SE], et al

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

Designated extension state (EPC)

BA ME

DOCDB simple family (publication)

EP 3081690 A1 20161019; FI 126455 B 20161215; FI 20155278 A 20161015

DOCDB simple family (application)

EP 16165107 A 20160413; FI 20155278 A 20150414