Furnaces – Process – Treating fuel constituent or combustion product
Patent
1992-08-20
1993-08-24
Favors, Edward G.
Furnaces
Process
Treating fuel constituent or combustion product
110203, 165 7, 422171, 422172, 423235, 4232391, F23J 1500
Patent
active
052379396
ABSTRACT:
An apparatus for reducing NOx pollution in the flue gas produced by a burner includes a heat exchanger wherein at least some of the heat transfer elements are coated with a catalyst. A plurality of reactive gas injectors are arranged to introduce a nitrogeneous compound, preferably a source of ammonia, across a hot-end face of the heat exchanger. A reactive gas flow distribution system permits the distribution of the nitrogeneous compound flowing through at least some of the gas injectors to be varied responsive to the temperature profile of the heat exchanger. Preferably, the apparatus also determines the total NOx flow in the flue gas, and the reactive gas flow distribution system permits the total amount of reactive gas flowing through at least some of the gas injectors to be varied responsive to the total NOx flow in the flue gas.
REFERENCES:
patent: 4602673 (1986-07-01), Michelfelder et al.
patent: 5078973 (1992-01-01), Kuroda et al.
patent: 5145652 (1992-09-01), Veser et al.
M. Kotter et al., "Selective catalytic reduction of nitrogen oxides--an original concept," International Chemical Engineering, vol. 31, No. 4, pp. 685-692 (Oct. 1991).
J. L. Reese et al., "Evaluation of SCR Air Heater for NOx Control on a Full-Scale Gas and Oil-Fired Boiler," 1991 Joint Symposium on Stationary Combustion NOx Control, Washington, D.C., (Mar. 1991) [copy of reference has no page numbering].
Krigmont Henry V.
Spokoyny Felix E.
Favors Edward G.
Garmong Gregory
Sandler Howard
Wahlco Environmental Systems, Inc.
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