Combustion method

Patent · Tue Jan 24 04:00:00 EST 1984

OSTI ID:6671496

Dykema, O W

A method for substantially reducing emissions of nitrogenous compounds such as NO /SUB x/ formed during fuel combustion. The fuel is combusted with an oxygen-containing gas in an amount from about 45 to 75% of the total stoichiometric amount of oxygen required for complete combustion of the fuel. The resulting mixture of fuel and combustion products, including NO /SUB x/ is maintained at a temperature of at least 1800/sup 0/ K. for a time sufficient to reduce the NO /SUB x/ content of the mixture to a desired level. Thereafter, combustion may be completed in one or more additional zones at a temperature within the range of about 1600/sup 0/ to 2000/sup 0/ K. Alternatively, the mixture of combustion products and fuel having a reduced NO /SUB x/ content may be used for other applications without further combustion. For certain embodiments of the invention, various particulates may be added to the combustion zone so as to enhance the rate at which the NO /SUB x/ is destroyed.

• Assignee: Rockwell Int'l Corp.
• Patent Number(s): US 4427362
• OSTI ID: 6671496
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
AIR POLLUTION
AIR POLLUTION ABATEMENT
CARBON COMPOUNDS
CARBON MONOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
COMBUSTION CHAMBERS
CONTROL
EXHAUST GASES
FLUIDS
FUEL-AIR RATIO
FUELS
GASEOUS WASTES
GASES
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION
POLLUTION ABATEMENT
TEMPERATURE CONTROL
THERMOCHEMICAL PROCESSES
WASTES