Global Patent Index - EP 3084298 A1

EP 3084298 A1 20161026 - METHOD AND BURNER FOR REDUCING NITROGEN OXIDE EMISSIONS DURING THE COMBUSTION OF A GASEOUS FUEL

Title (en)

METHOD AND BURNER FOR REDUCING NITROGEN OXIDE EMISSIONS DURING THE COMBUSTION OF A GASEOUS FUEL

Title (de)

VERFAHREN UND BRENNER ZUR VERRINGERUNG VON STICKOXIDEMISSIONEN BEI DER VERBRENNUNG EINES GASFÖRMIGEN BRENNSTOFFES

Title (fr)

PROCEDE ET BRULEUR POUR REDUIRE L'EMISSION D'OXYDE D'AZOTE LORS DE LA COMBUSTION D'UN COMBUSTIBLE GAZEUX

Publication

EP 3084298 A1 20161026 (FR)

Application

EP 14833213 A 20141216

Priority

  • FR 1362792 A 20131217
  • IB 2014066971 W 20141216

Abstract (en)

[origin: WO2015092682A1] The invention relates to a method for reducing nitrogen oxide NOx emissions during the combustion of a gaseous fuel in a burner (10') intended for a naked-flame or controlled-atmosphere reheating furnace, for reheating steel products or for continuous coating and/or annealing of metal strips, in particular of steel, according to which a first dilution is carried out by mixing combustion air (7) with combustion products (9) upstream from the burner or in the body of the burner, and a second dilution is carried out directly at the level (A) at which the gaseous fuel reacts with the combustion air, mixing the fuel with a recirculated portion of the flame or the products of partial combustion, said double dilution enabling the physical and chemical properties of the gas to be modified in order for the burner to operate with low oxygen rates such as to obtain a flame that produces a very low level of NOx production regardless of the temperature of the enclosure in which the combustion takes place.

IPC 8 full level

F23C 3/00 (2006.01); F23C 9/00 (2006.01)

CPC (source: EP US)

F23C 3/002 (2013.01 - EP US); F23C 5/08 (2013.01 - US); F23C 9/006 (2013.01 - EP US); F23C 9/08 (2013.01 - US); F23C 2202/20 (2013.01 - EP US); F23C 2202/30 (2013.01 - EP US); F23C 2900/09002 (2013.01 - EP US); F23D 2203/005 (2013.01 - US); F23D 2203/1012 (2013.01 - US)

Citation (search report)

See references of WO 2015092682A1

Citation (examination)

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)

FR 3015009 A1 20150619; FR 3015009 B1 20190125; CN 206269123 U 20170620; EP 3084298 A1 20161026; US 10352556 B2 20190716; US 2017003018 A1 20170105; WO 2015092682 A1 20150625

DOCDB simple family (application)

FR 1362792 A 20131217; CN 201490001272 U 20141216; EP 14833213 A 20141216; IB 2014066971 W 20141216; US 201415104779 A 20141216