Flue gas scrubber

Flue gas scrubbing in the washing column

In the waste incineration process, many pollutants are set free through the flue gas. The gas must therefore be cleaned before it is released into the environment. Harmful acidic gases like sulphur dioxide are dissolved out in the flue gas scrubber. This is done by spraying lime-water solution into the gas in a washing column. The lime residues are filtered out of the washing water and used as a raw material, e.g. for the production of gypsum plaster-board. A constant level is required in the flue gas scrubber for a continuous cleaning process.