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FLUE GAS DESULFURIZATION: THE STATE OF THE ART
Citation:
Srivastava*, R K., T G. Brna*, C B. Sedman*, K. Culligan*, AND W. Jozewicz. FLUE GAS DESULFURIZATION: THE STATE OF THE ART. Presented at Conference on Air Quality II, McLean, VA, 9/19-21/00.
Description:
The paper gives results of a review of commercially available flue gas desulfurization (FGD) technologies that have an established record of full-scale performance. (NOTE: Sulfur dioxide (SO2) scrubbers may be used by coal-fired electrcity generating units to meet the requirement of Phase II of the Acid Rain SO2 Reduction Program. Additionally, the use of scrubbers can result in reduction of mercury and other emissions from combustion sources. It is timely, therfore, to examine the current status of SO2 scrubbing technologies). Data on worldwide FGD applications reveal that wet FGD technologies have been used at most installations. Among the 668 worldwide FGD technology installations completed through 1998, 544(or 81%) have wet FGD systems. The remaining 124 installations use dry FGD systems. The SO2 removal performance of scrubbers has been reviewed. data reflect that most wet limestonme nd lime spray drying installations appear to be capable of about 90% SO2 removal. Advanced, state-of-the-art wet scrubbers can provide SO2 removal in excess of 95%. Costs associated with wet limestone forced oxidation (LSFC) and lime spray dryer (LSD) technologies are analyzed with state-of-the-art cost models. Analyses of LSFO and LSD capital costs indicate an economy of scale over the entire range of unit size considered.