B - Operations – Transporting – 01 – D
Patent
B - Operations, Transporting
01
D
23/348
B01D 53/34 (2006.01) B01D 53/50 (2006.01) F23J 7/00 (2006.01)
Patent
CA 1321464
ABSTRACT A method and apparatus are employed to reduce the sulfur dioxide produced by the combustion of a sulfur- containing fuel in a combustion chamber. Part of the combustion air is introduced into the combustion chamber with and closely adjacent the fuel. Another part of the combustion air is introduced into the combustion chamber above and downstream of the fuel and relatively remote therefrom under conditions which buffer the flame front and reduce peak flame temperatures therein. Finely divided limestone particles or the like are aspirated into the combustion chamber by the air introduced above the fuel and distributed thereby throughout the gases flowing downstream through the combustion chamber wherein the limestone particles are calcined to lime particles which react with the sulfur dioxide in the combustion reaction gases to produce calcium sulfate. There is no premixing of the particles and the aspirating air before they enter the combustion chamber. Lime containing deposits are formed on the inside wall of the combustion chamber which may be removed by soot blowing. The feeding of lime may be interrupted during soot blowing, and the soot blowing may be partial so as to expose a new lime containing outer layer of the deposit.
616387
Anderson Lee R.
Landreth Ronald R.
Inland Steel Company
Ridout & Maybee Llp
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