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Abstract
The injection of dry alkaline compounds into the furnace or post-furnace regions of utility boilers to reduce SO2 is currently under development as a lower cost option to conventional flue gas desulfurization technology. Part I of this paper focused on the science and process development of the various dry sorbent technologies. Part II will address applications of these technologies, including SO2 removals in full-scale boilers, methodologies for designing sorbent injection systems, power plant impacts, process integration issues, and cost.
Because the dry technologies use the furnace and/or ducts as the chemical contactor, potential impacts on power plant operation and reliability are as critical in assessing the commercial applicability of each technology as SO2 removal and sorbent utilization. Consequently, the technical and economic feasibility of the various dry processes is highly site specific.