Aircon scrubbers are air pollution control devices that use a high-energy liquid spray to remove aerosol and gaseous pollutants from an air stream. The gases are removed either by absorption or chemical reaction. In addition to fume and gas abatement, scrubbers may be used for process air cleaning and dust collection. 

 

Aircon scrubbers are commonly used to help control emissions of sulfur into the atmosphere. This is of particular interest to those involved with electric power generation via combustion of coal. The gases that are emitted from the combustion process are passed through tanks containing a lime substance (often a limestone slurry) that can capture and neutralize the sulfur dioxide. scrubbers are differentiated by the manner in which they remove gases and particulates from the air; either wet or dry. Wet scrubbers literally wash dust and particles out of the air. Exhaust air is forced into a spray chamber, where fine water particles cause the dust to drop from the air stream. The dust-laden water is then treated to remove the solid material and is often recirculated.  Dry scrubbers are used more commonly with acid gases. The pollutant is collected on or in a solid or liquid material, which is injected into the gas stream. A dry scrubber produces a dry product that must be collected downstream from this control device.