What type of scrubber is commonly found in incinerators?

The correct choice is a wet scrubber because this type of device is specifically designed to remove pollutants from gas streams by using a liquid solution. In incinerators, wet scrubbers are employed to capture and neutralize acidic gases and particulate matter produced during the combustion of waste. The process involves the gas being passed through a liquid, typically water or a chemical solution, which absorbs or reacts with the harmful substances, effectively cleaning the exhaust before it is released into the atmosphere.

Wet scrubbers are particularly effective for dealing with a variety of contaminants, including sulfur dioxide and hydrochloric acid, which are common byproducts of incineration. This capability makes them a critical part of the pollution control system in waste-to-energy facilities, ensuring compliance with environmental regulations and protecting air quality.

In contrast, dry scrubbers use a solid absorbent material, which is not suitable for incinerators that produce a wide range of wet and hazardous gases. Electrostatic scrubbers utilize high-voltage electricity to collect particles, but they are primarily focused on particulate matter rather than gaseous pollutants. Absorption scrubbers, while similar, are often referenced more in the context of specific chemical processes rather than the general context of incineration, where wet scrubbing is predominant.