Furnaces – Process – Treating fuel constituent or combustion product
Patent
1992-01-10
1993-01-05
Favors, Edward G.
Furnaces
Process
Treating fuel constituent or combustion product
110216, 422169, 422172, 423235, F23J 1100, F23J 1500
Patent
active
051760886
ABSTRACT:
A process and apparatus for simultaneously removing NO.sub.X and SO.sub.X from the exhaust of a furnace includes an injection of limestone into a region of the furnace having a temperature of about 2,000.degree.-2,400.degree. F., and an injection of ammonia into a region in the furnace having a temperature of about 1,600.degree.-2,000.degree. F. The limestone absorbs at least some of the SO.sub.X and the ammonia absorbs at least some of the NO.sub.X. The exhaust from the furnace which contains particulate and gases, is supplied to a dry scrubber where further reactions take place between unused ammonia and SO.sub.X, and calcium sorbent and SO.sub.X. Sorbent and ammonia regeneration can also be utilized to further improve the efficiency of the system.
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Amrhein Gerald T.
Rackley John M.
Vecci Stanley J.
Edwards Robert J.
Favors Edward G.
Kalka Daniel S.
Matas Vytas R.
The Babcock & Wilcox Company
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