Nitrogen oxide control using internally recirculated flue gas

Patent · Tue Sep 03 04:00:00 UTC 1991

OSTI ID:5686836

Martin, M J; Gibson, W C; Massey, L R

This patent describes improvement in combination with a burner assembly disposed to provide a combination flame in the combustion zone of a furnace in which internally recirculating flue gas is created, the furnace having a wall portion and a furnace floor portion which supports the burner assembly, the burner assembly having a burner tile surrounding a primary fuel nozzle disposed centrally to an inlet port for intake of a combustion supporting fluid, and the burner assembly having a plurality of secondary fuel nozzles peripherally disposed about the burner tile. The improvement comprises: flue gas recirculating means disposed in the furnace for collecting and directing internally recirculating flue gas into the vicinity of the secondary fuel nozzles so that the collected internal flue gas is aspirated into reaction contact with the combustion flame so that the collected internally recirculating flue gas is reacted with the combustion flame to substantially diminish the NO{sub x} content of the flue gas exhausted from the furnace.

• Assignee: IT-McGill Pollution Control Systems, Inc., OK (United States)
• Patent Number(s): A; US 5044932
• Application Number: PPN: US 7-423145
• OSTI ID: 5686836
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010800* -- Coal
Lignite
& Peat-- Waste Management
20 FOSSIL-FUELED POWER PLANTS
200202 -- Fossil-Fueled Power Plants-- Waste Management-- Noxious Gas & Particulate Emissions
54 ENVIRONMENTAL SCIENCES
540120 -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DENITRIFICATION
EQUIPMENT
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLUE GAS
FURNACES
GASEOUS WASTES
NITROGEN COMPOUNDS
NITROGEN OXIDES
NOZZLES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
WASTES