Record Display for the EPA National Library Catalog


Main Title Additive Injection for Sulfur Dioxide Control. A Pilot Plant Study.
Author Atti, R. C. ; Sedo, P. ;
CORP Author Babcock and Wilcox Co., Alliance, Ohio. Research Center.
Year Published 1970
Report Number BW-5460; PH-86-67-127; 1176;
Stock Number PB-226 761
Additional Subjects Air pollution control equipment ; Sulfur dioxide ; Temperature ; Pilot plants ; Additives ; Coal ; Limestone ; Dolomite ; Combustion products ; Tables(Data) ; Fly ash ; Performance evaluation ; Furnaces ; Deposition ; Slagging ; Efficiency ; Flue gases ; Electrostatic precipitators ; Electrical resistivity ; Surface properties ; Chemical analysis ; Nitrogen oxides ; Air pollution control ; Limestone injection ; Dry methods
Library Call Number Additional Info Location Last
NTIS  PB-226 761 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 187p
A small pilot plant that burns pulverized coal was used to evaluate a dry limestone injection process. More than 400 tests were performed with over 100 different limestones or dolomitic-type additives to evaluate their effectiveness for reducing sulfur dioxide emission under a variety of test conditions. Some of the major variables studied include temperature at the point of additive injection, residence time of the additive in the reactive zone, additive/sulfur ratio, additive surface area and chemical form of the additive. The effects of the additives on ash deposition and fly ash resistivity were also studied. The process is considered only as a stopgap measure when applied as the sole means for removing SO2 from flue gas. Under certain conditions additives can produce or aggravate furnace-wall slagging and ash deposition problems. Electrical resistivity of reacted additive-fly ash products is increased, which will decrease performance of electrostatic precipitators.