Staged combustion of fuel or sludge to reduce nitrous oxide emis

Details Staged combustion of fuel or sludge to reduce nitrous oxide emis Staged combustion of fuel or sludge to reduce nitrous oxide emis

1991-12-09

1992-08-25

Favors, Edward G.

Furnaces

Process

Burning pulverized fuel

110186, 110232, 110233, F23D 100

Patent

active

051409160

ABSTRACT:
A system and apparatus is disclosed for delivering fuel to a furnace using an inert gas medium which has acquired moisture from the application of the furnace stack gas for drying the incoming fuel material during the reduction of the fuel to a desired size for combustion in the furnace. The use of an oxygen deficient inert gases medium as a propellant to deliver the fuel to the furnace is augmented by supplying air to the furnace to establish a staged combustion environment in the furnace to avoid the generation of high levels of the pollutant nitrous oxide which is understood to be generated by high flame temperatures and with high oxygen and nitrogen concentrations.

REFERENCES:
patent: 4489664 (1984-12-01), Williams
patent: 4518123 (1985-05-01), Tanaka et al.
patent: 4640204 (1987-02-01), Williams
patent: 4998485 (1991-03-01), Williams

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