DuPont™ BELCO® Clean Air Technologies provides a complete semi-dry scrubbing system that removes particulate matter and acid gases from combustion flue gas, while capturing mercury, heavy metals, dioxins and furans.
The heart of the BELCO® semi-dry scrubbing process is the spray dryer absorber. Flue gas enters the top of the reactor, where it is immediately mixed with a finely atomized spray of reagent from BELCO® patented dual-fluid nozzle. The acid gases are absorbed by the reagent to form neutralized salts and, at the same time, the water evaporates leaving a dry powder.
The dried reaction products and flyash are swept out of the reactor to a particulate collector, where they are removed from the flue gas. BELCO® can supply a variety of collection devices – pulse jet or reverse air fabric filters, or electrostatic precipitators – as best suited to process requirements.
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