Importance

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Abstract

A method of purifying an exhaust gas characterized by dispersing individually independent fine particles of a Ca-containing absorbent in a carrier gas to a high concentration by a dividing-dispersing device to which the carrier gas and the absorbent are supplied, the absorbent being up to 10 microns in mean particle diameter, introducing the resulting aerosol of high concentration into the exhaust gas to uniformly mix the aerosol with the exhaust gas and thereafter introducing the exhaust gas into a dust collector, whereby the fine particles of absorbent having absorbed harmful acid substances from the exhaust gas are removed together with dust and soot. The absorbent forming secondary agglomerates before reaching the dividing-dispersing device are divided into individually independent primary particles and then dispersed in the carrier gas by the device, so that when introduced into the exhaust gas, the absorbent reacts with the harmful acid substance over an increased area of contact to achieve an improved removal efficiency.

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First Claim