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| wet scrubber; wet scrubber 1. An air cleaning device that literally washes out the dust. Exhaust air is forced into a spray chamber, where fine water particles cause the dust to drop from the air stream. The dust-ladden water is then treated to remove the solid material and is often recirculated. 2. Equipment through which a gas is passed to remove impurities (solid, liquid, or gaseous particles) by intimate contact with a suitable liquid, usually an aqueous medium | |||