Flue gas recirculation for NO sub x reduction in premix burners

Patent · Tue Mar 03 04:00:00 EST 1992

OSTI ID:5268443

Dinicolantonio, A R

This patent describes a premix burner for obtaining reduced NO{sub x} emission in the combustion of fuel gas, the premix burner being located adjacent a first opening in a furnace. It comprises a burner tube having a downstream end, and having an upstream end for receiving air and fuel gas, a burner tip being mounted on the downstream end of the burner tube adjacent the first opening in the furnace, so that combustion of the fuel gas takes place at the burner tip; a gas spud located adjacent the upstream end of the burner tube, for introducing fuel gas into the burner tube; at least one passageway having a first end at a second opening in the furnace and a second end adjacent the upstream end of the burner tube; means for drawing flue gas from the furnace, through the passageway, in response to the aspirating effect of uncombusted fuel gas exiting the gas spud, the uncombusted fuel gas flowing through the burner tube from its upstream end towards its downstream end, whereby the flue gas is mixed with air at the upstream end of the burner tube prior to the point of combustion of the fuel gas and air; and at least one air opening spaced from the at least one passageway and opening into the furnace, and arranged to allow uncombusted air, which is cooler than the flue gas, to be passed therethrough into the furnace, and thereafter to be drawn into the at least one passageway along with flue gas, to thereby lower the temperature of the drawn flue gas.

• Assignee: Exxon Chemical Patents Inc., Linden, NJ (United States)
• Patent Number(s): A; US 5092761
• Application Number: PPN: US 7-615357
• OSTI ID: 5268443
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000 -- Engineering-- Combustion Systems
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
BURNERS
CHALCOGENIDES
CHEMICAL REACTIONS
CONTROL
DENITRIFICATION
DISPERSIONS
EQUIPMENT
EXHAUST RECIRCULATION SYSTEMS
EXHAUST SYSTEMS
FLUE GAS
FLUIDS
FUEL GAS
FUELS
GAS FUELS
GASEOUS WASTES
GASES
MIXTURES
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
WASTES