Investigation of processes to treat zinc-ferrite regeneration offgases in high temperature desulfurization of coal gases. Final report.

摘要

A bench-scale test program has been performed to evaluate the effect of critical operating variables on sulfur dioxide removal efficiency for two candidate ''throwaway'' desulfurization processes for treating zinc-ferrite reactor regeneration offgas. These two ''throwaway'' processes, dual-alkali wet scrubbing and spray dryer desulfurization, generate a gypsum waste sludge environmentally acceptable for disposal. They have seen extensive commercial application in flue gas desulfurization, but have not been evaluated for such high levels of removal efficiency and such high inlet sulfur dioxide concentrations as would be required for this application. 13 figs., 15 tabs.