Industrial Minerals


FGD’s solution for pollution

July 2011

by Jessica Roberts

END USER FOCUS: New coal-fired power capacity and crackdowns on existing polluting sites continue to lead demand for flue gas desulphurisation and its key mineral consumption

Keywords: FGD, flue gas desulphurisation, limestone, lime, magnesia, gypsum

 
Sokolovska Uhelna’s 125 MWe plant in Vresova, Czech Republic, was retrofitted FGD technology by Enprima Engineering in 2000, and can now remove 95% SO2 emissions.
Enprima Engineering Ltd

Flue gas desulphurisation (FGD) technology is primarily used by fossil fuel-burning power stations to remove acids - namely sulphur dioxide (SO2) - from gaseous effluents, although smaller markets such as incinerators and industrial boilers also use FGD systems to clean up their emissions.

The harmful effects of SO2 on the environment have been well-documented, and it is known that both natural and man-made sources of SO2 and nitric acid (NOx) contribute to the formation of acid rain - created when the gases react in the atmosphere with oxygen, water, and other chemicals to form numerous acidic compounds.

FGD technology is based on a chemical reaction that occurs when the warm exhaust gases from the coal-fired boiler come into contact...