METHOD AND APPARATUS FOR TREATING EXHAUST GAS

摘要

PROBLEM TO BE SOLVED: To perform exhaust gas treatment improved on collection efficiency for a sulfuric acid mist in a wet type electrical dust precipitator.

SOLUTION: The method comprises: removing oxides of sulfur by wet-desulphurizing an exhaust gas; thereafter obtaining an amount of the sulfuric acid mist in the desulphurized exhaust gas; mixing with an ammonia gas having a concentration of not greater than the ratio of one equivalent to the sulfuric acid mist; and passing through the wet electrical dust precipitator to remove the sulfuric acid mist. The method can be actualized by providing an apparatus for treating the exhaust gas having the wet electrical dust precipitator for removing the oxides of sulfur in the exhaust gas and the wet type electrical dust precipitator for removing the sulfuric acid mist with a means for supplying the ammonia gas which supplies the ammonia gas to the exhaust gas introduced into the wet type electrical dust precipitator.

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