C - Chemistry – Metallurgy – 10 – J
Patent
C - Chemistry, Metallurgy
10
J
C10J 1/00 (2006.01) C10L 10/00 (2006.01) F23J 7/00 (2006.01) F23L 7/00 (2006.01)
Patent
CA 2133638
First, nitrogen oxides are reduced by firing coal in substoichiometric air conditions in a first stage oxidation unit of a combustor to reduce NOx from fuel bound nitrogen. Hydrated lime, Ca(OH)2, is introduced into the first stage oxidation unit to produce calcium sulfide. The calcium sulfide becomes tied up in a slag eutectic which is removed prior to entry of the fuel gas to a second stage oxidation unit at the entrance of a furnace where additional preheated air is added to the fuel gas.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Florida Power Corporation
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