Nox control for high nitric oxide concentration flows through co

Furnaces – Process – Treating fuel constituent or combustion product

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Details

110342, 110347, 422168, 423139, F23J 1100, F23J 1500

Patent

active

048784427

ABSTRACT:
An improved method for removing nitrogen oxides from concentrated waste gas streams, in which nitrogen oxides are ignited with a carbonaceous material in the presence of substoichiometric quantities of a primary oxidant, such as air. Additionally, reductants may be ignited along with the nitrogen oxides, carbonaceous material and primary oxidant to achieve greater reduction of nitrogen oxides. A scrubber and regeneration system may also be included to generate a concentrated stream of nitrogen oxides from flue gases for reduction using this method.

REFERENCES:
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patent: 4612175 (1986-09-01), Harkness et al.
patent: 4615780 (1986-10-01), Walker
patent: 4699071 (1987-10-01), Vier et al.
patent: 4782770 (1988-11-01), Carlson
Carlson, U.S. Statutory Invention Registration No. H19.
U.S. patent application Ser. No. 148, 513 filed Jan. 26, 1988; Allowed May 4, 1988.
Wendt et al., "Reduction of Sulfur Trioxide and Nitrogen Oxides by Secondary Fuel Injection", Fourteenth Symposium (Internat'l ) on Combustion, the Combustion Inst., 1973.
Neal, "Evaluation of the NOXSO Combines No.sub.x /SO.sub.2 Treatment Process", Flue Gas Cleanup Contractors' Review Meeting, U.S. DOE, 1984.
Yeh et al., "New Strategy to Decomposie Nitrogen Oxides From Regenerable Flue Gas Cleanup Processes", 194th ACS National Meeting, Aug. 30-Sep. 4, 1987.

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