| abstract |
The invention relates to a process for separating off pollutants from hot combustion exhaust gases. The cooled exhaust gases are passed in succession through a plurality of settling chambers of purification stages, in which, to precipitate out the pollutants, reaction water treated with salt brine and/or calcium hydroxide is sprayed in a finely divided form into the exhaust gases. In this case, the water-insoluble, solid pollutants are crystallized out and directly withdrawn, while the remaining, water-soluble pollutant substances are withdrawn from the reaction water in the overflow, dried and conducted away as environmentally acceptable substances. |