Nitrogen oxide reduction in furnaces

Details Nitrogen oxide reduction in furnaces Nitrogen oxide reduction in furnaces

1986-01-16

1987-10-13

Favors, Edward G.

Furnaces

Process

Treating fuel constituent or combustion product

110204, 110205, 110206, 431115, F23J 1100, F23J 1500

Patent

active

046990712

ABSTRACT:
A method and apparatus for reducing the NO.sub.x content of hot stack (exhaust) gas produced by a furnace burning a fossil fuel, comprising recycling part of said NO.sub.x -containing stack gas, in admixture with cold fresh air, back into the combustion chamber of the furnace.

REFERENCES:
patent: 3781162 (1973-12-01), Rudd et al.
patent: 3920377 (1975-11-01), Yanuki et al.
patent: 3927627 (1975-12-01), Brunn
patent: 4135874 (1979-01-01), Tsuzi et al.
patent: 4505230 (1985-03-01), Caplin

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