SI0809067T1 - Process and installation for reducing by recombustion of nitric oxides in exhaust gases from a primary combustion in a furnace - Google Patents

Process and installation for reducing by recombustion of nitric oxides in exhaust gases from a primary combustion in a furnace

Info

Publication number
SI0809067T1
SI0809067T1 SI9730090T SI9730090T SI0809067T1 SI 0809067 T1 SI0809067 T1 SI 0809067T1 SI 9730090 T SI9730090 T SI 9730090T SI 9730090 T SI9730090 T SI 9730090T SI 0809067 T1 SI0809067 T1 SI 0809067T1
Authority
SI
Slovenia
Prior art keywords
recombustion
pressure
zone
furnace
smoke
Prior art date
Application number
SI9730090T
Inventor
Thierry Ferlin
Jean-Charles Joigneault
Original Assignee
Gaz De France
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gaz De France filed Critical Gaz De France
Publication of SI0809067T1 publication Critical patent/SI0809067T1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
    • F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
    • F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
    • F23C6/047—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  A CARRIER GAS OR AIR 
    • F23C2201/00—Staged combustion
    • F23C2201/10—Furnace staging
    • F23C2201/101—Furnace staging in vertical direction, e.g. alternating lean and rich zones

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)

Abstract

The reduction of oxides of nitrogen contained in furnace smoke is carried out by recombustion of the smoke, using a secondary fuel injected into a recombustion zone in at least two jets at relatively high and relatively low pressure respectively. The low-pressure jet is situated outside and concentrically with the high-pressure jet. The secondary fuel is a gas at a pressure of a few millibars to a few hundred millibars for the low pressure jet, and a few hundred millibars to a few bars to the high-pressure one. The pressure and flow of the gas in the two jets are regulated according to the dimensions of the recombustion zone and the characteristics of the smoke. The recombustion zone is also subjected to acoustic waves at a frequency of below some 32 Hz. The procedure is carried out in a recombustion zone (B) fed with secondary fuel through two coaxial inlets (2,2') equipped with pressure regulators (4,5). One wall of the recombustion zone is equipped with an acoustic wave generator (6) to homogenise the mixture inside the zone.
SI9730090T 1996-05-21 1997-04-30 Process and installation for reducing by recombustion of nitric oxides in exhaust gases from a primary combustion in a furnace SI0809067T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9606293A FR2749066B1 (en) 1996-05-21 1996-05-21 METHOD FOR REDUCING, BY RECOMBUSTION, THE NITROGEN OXIDES CONTAINED IN THE SMOKE FROM A PRIMARY COMBUSTION MADE IN AN OVEN, AND INSTALLATION FOR IMPLEMENTING IT
EP97400984A EP0809067B1 (en) 1996-05-21 1997-04-30 Process and installation for reducing by recombustion of nitric oxides in exhaust gases from a primary combustion in a furnace

Publications (1)

Publication Number Publication Date
SI0809067T1 true SI0809067T1 (en) 2001-04-30

Family

ID=9492315

Family Applications (1)

Application Number Title Priority Date Filing Date
SI9730090T SI0809067T1 (en) 1996-05-21 1997-04-30 Process and installation for reducing by recombustion of nitric oxides in exhaust gases from a primary combustion in a furnace

Country Status (11)

Country Link
EP (1) EP0809067B1 (en)
AT (1) ATE195999T1 (en)
CZ (1) CZ135297A3 (en)
DE (1) DE69702950T2 (en)
ES (1) ES2152070T3 (en)
FR (1) FR2749066B1 (en)
HU (1) HUP9700845A1 (en)
PL (1) PL320054A1 (en)
PT (1) PT809067E (en)
SI (1) SI0809067T1 (en)
SK (1) SK55397A3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5908003A (en) * 1996-08-15 1999-06-01 Gas Research Institute Nitrogen oxide reduction by gaseous fuel injection in low temperature, overall fuel-lean flue gas
FR2834774B1 (en) * 2002-01-16 2004-06-04 Saint Gobain Emballage BURNER AND METHOD FOR REDUCING NOx EMISSIONS IN A GLASS FURNACE
NL2001797C2 (en) * 2008-07-14 2010-01-18 Essent En Produktie B V Method for burning a second solid fuel in combination with a first solid fuel.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59173605A (en) * 1983-03-23 1984-10-01 Hitachi Zosen Corp Uniform feeding method of powder fuel in combustion furnace
DE3410945A1 (en) * 1984-03-24 1985-10-03 Steag Ag, 4300 Essen METHOD FOR REDUCING NO (ARROW DOWN) X (ARROW DOWN) FORMATION IN COMBUSTION PLANTS, IN PARTICULAR MELT CHAMBER FIREPLACES, AND COMBUSTION SYSTEM FOR IMPLEMENTING THE PROCESS
DE3441675A1 (en) * 1984-11-15 1986-05-22 L. & C. Steinmüller GmbH, 5270 Gummersbach METHOD FOR REDUCING NO (ARROW DOWN) X (ARROW DOWN) CONTENT IN COMBUSTION GASES
US4779545A (en) * 1988-02-24 1988-10-25 Consolidated Natural Gas Service Company Apparatus and method of reducing nitrogen oxide emissions
IT1247541B (en) * 1991-05-07 1994-12-17 Ente Naz Energia Elettrica PROCESS FOR REDUCING NITROGEN OXIDES IN COMBUSTION GASES
US5181475A (en) * 1992-02-03 1993-01-26 Consolidated Natural Gas Service Company, Inc. Apparatus and process for control of nitric oxide emissions from combustion devices using vortex rings and the like
JPH0727313A (en) * 1992-08-27 1995-01-27 Tokyo Gas Co Ltd High temperature furnace

Also Published As

Publication number Publication date
PL320054A1 (en) 1997-11-24
EP0809067A1 (en) 1997-11-26
FR2749066B1 (en) 1998-08-21
FR2749066A1 (en) 1997-11-28
CZ135297A3 (en) 1997-12-17
EP0809067B1 (en) 2000-08-30
HU9700845D0 (en) 1997-06-30
ES2152070T3 (en) 2001-01-16
ATE195999T1 (en) 2000-09-15
DE69702950T2 (en) 2001-03-29
SK55397A3 (en) 1998-01-14
HUP9700845A1 (en) 2000-05-28
PT809067E (en) 2001-02-28
DE69702950D1 (en) 2000-10-05

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