05024171 is referenced by 67 patents and cites 2 patents.

The sulfur trioxide in the combustion gas stream of a power plant is reacted with injected ammonia to produce a solid ammonium sulfate that is captured, and not released to the atmosphere. A feedforward signal indicative of the total mass flow of sulfur trioxide is determined as the product of the measured boiler load and the sulfur trioxide content of the combustion gas, as measured prior to the addition of ammonia. The ammonia mass flow injection rate is preferably at a normal stoichiometric ratio of from about 1.0 to about 1.1 relative to the sulfur trioxide mass flow rate (that is, from about 2.0 to about 2.2 times the molar mass flow rate of the sulfur trioxide), avoiding the production of ammonia bisulfate. The ammonia content of the combustion gas stream is measured downstream of the location at which ammonia is added. Based upon this feedback measurement, the amount of ammonia added is adjusted to be just sufficient to react with all of the sulfur trioxide, but not in such excess as to be environmentally detrimental.

Title
Reduction of acidic emissions from combustion of sulfur-laden fuels
Application Number
7/496872
Publication Number
5024171
Application Date
March 19, 1990
Publication Date
June 18, 1991
Inventor
Barry J Southam
Irvine
CA, US
Everett L Coe Jr
Downey
CA, US
Henry V Krigmont
Seal Beach
CA, US
Agent
Gregory O Garmong
Howard E Sandler
Assignee
Wahlco
CA, US
IPC
F23J 15/00
F23J 11/00
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