Any of several forms of chemical/physical devices which operate to neutralize sulfur compounds formed during coal combustion These devices combine the sulfur in gaseous emissions with other chemicals to form inert compounds, such as gypsum, which must then be removed for disposal
a device that uses 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
Any device intended to remove particulates, acidic gases or odorous compounds from a gas stream Usually scrubbers absorb the target material into a liquid stream for later separation or treatment Occasionally a dry scrubber is used, where adsorbent particles are used to remove components (usually acidic gases) from a fouled gas stream
An emission control device that adds alkaline reagents to react with and neutralize acid gases
a pollution control device that sprays a stream of water across or through a stream of polluted air to remove pollutants Scrubbers are widely used in a variety of combustion processes