Process for purifying flue gases with a high chloride content

Details Process for purifying flue gases with a high chloride content Process for purifying flue gases with a high chloride content

B - Operations, Transporting

01

D

B01D 53/34 (2006.01) B01D 53/60 (2006.01) B01D 53/68 (2006.01)

Patent

CA 2094150

2094150 9206771 PCTABS00011 Described is a process for purifying flue gases with a high chloride content, in particular gases from domestic-waste and special waste incineration plants, by multi-stage absorption of the impurities, the strongly acid components of the flue gases, such as HCl and HF, being scrubbed out first with water and/or lye and the less acid components, such as SO2 and NOx, being removed afterwards. The invention calls for flue dust, heavy metals and HF to be separated out by quenching with water, while hydrogen chloride is converted, in at least two subsequent washing stages, into salt solutions.

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