Incinerator flue gas cleaning using wet-type electrostatic precipitator

An experimental approach has been adopted to remove dioxins and other pollutants from incinerator flue gas in a pilot-scale experimental system. The main objective of this study is to investigate the combined system for simultaneous removal of gaseous pollutants and dusts. The combined gas cleaning system consists of a radiator, a scrubber and a wet-type electrostatic precipitator (ESP). Dioxins can be decomposed effectively using after-burners downstream of the incinerator by maintaining the gas temperature around 850 +/- 20 degrees C. Fractional removal rates for various kinds of dioxins (PCDDs + PCDFs) were measured in this study. When the combined system is used, dioxin removal rates of 90-92% are achieved over a wide range of initial concentrations of dioxins. The combined system is also found to be effective in the removal of NOx, SOx, HCl, and dust.