reduction of mercury emissions from cement plants

摘要

This invention provides methods for reduction of mercury emissions from cement plants. In one method, a powdered activated carbon sorbent is injected into a gas stream of a cement plant at one or more points after the kiln and before the particulate collection device of the cement plant. Also provided is an apparatus for decreasing emissions from a cement plant, 0 which apparatus comprises two or more beds in a series comprising a fxst bed which is a moving bed, and one or more remaining beds which are fixed beds, each fixed bed comprising at least one sorbent which is able to absorb at least one of mercury, hydrocarbons,and hydrochloric acid. Another method for reducing emissions fkom a cement plant employs the apparatus just described.