process of flue gas desulfurization
I can tell you that Flue Gas Desulfurization. It is a series of technologies designed to control sulfur dioxide. These gases slowed from coal-fired power plants are what cause us acid rain and sometimes even asthma. FGD works by spraying a mixture of water and lime onto the flue gases from which it can absorb SO2 in a wet scrubber process, then drops to settle with gypsum in the form of a wet slurry. The solid by-product is gypsum which can be used for building materials or as an additive in food. Devices in FGD systems include spray towers, absorber units, slurry circulation systems and gypsum dewatering and handling facilities. These systems typically are highly efficient, with removal efficiency sometimes exceeding 90%. FGD is largely used in coal-fired power plants, but it can also be applied to other industrial processes where the release of sulfur is undesirable.