Flue-gas desulfurization (FGD) is a set of technologies used to remove sulfur dioxide (SO
2) from exhaust flue gases of fossil-fuel power plants, and from the emissions of other sulfur oxide emitting processes. As stringent environmental regulations regarding SO2 emissions have been enacted in many countries, SO2 is now being removed from flue gases by a variety of methods. For a typical coal-fired power station, flue-gas desulfurization (FGD) may remove 90 percent or more of the SO2 in the flue gases.

Approximately 85% of the flue gas desulfurization units installed in the US are wet scrubbers.

Wet scrubbers remove dust particles by capturing them in liquid droplets. The droplets are then collected, the liquid dissolving or absorbing the pollutant gases. Any droplets that are in the scrubber inlet gas must be separated from the outlet gas stream by means of another device referred to as a mist eliminators.

Detailing Technology Corp has been involved in detailing FGD ductwork and scrubber components for over 25 years. Wet scrubber systems generally consist of ductwork and fan systems, saturation chambers, scrubbing vessels, entrainment separators or mist eliminators, pumping (and possible recycle systems), spent scrubbing liquid treatment or reuse systems, and an exhaust stack.