Exhaust Gas Scrubbers
Generally speaking exhaust gas scrubbers use packed bed or packed tower scrubbers, they are designed to remove both particulate matter in addition to gaseous pollutants. The gaseous stream is fed into the exhaust venting tower system where there is a bed of special packing material. Nozzles direct a spray of scrubbing liquid that passes down through the tower onto the packing material.
As the gas passed through the packing material, the polluted exhaust gas molecules come into contact with the film of scrubbing liquid that continuously coat the scrubber packing material (usually limestone chips). The now contaminated liquid drains through the packing material, through the apertures of the packing bed and down further into the base of the tower.
The now clean gas passes through a section passed the spray nozzles and a mist eliminator before exiting the tower.