Acid mist causes problems for FGD systems

摘要

Emissions of fine particulates, aerosols and acid gases are drawing significant attention from regulators, environmental groups, health agencies and the general public. Removing these species, particularly sulfuric acid mist from flue gas streams, is complicated. However, an understanding of their formation can assist in developing and applying effective emissions control systems. SO{sub}2 emissions can be reduced using commercial flue gas desulfurization (FGD) technology and NO{sub}x emissions abated by selective catalytic reduction (SCR) or other processes. However, the removal of SO{sub}3 and the control of aerosol sulfuric acid and ammonia salts is not as straightforward.