Exhaust gas treatment system equipped with carbon dioxide removal device

Abstract

An object of the present invention is to solve these problems and to provide a exhaust gas treatment system which prevents formation of deposits in a main duct and a flue, on and after the point where the exhaust gases converge, after the removal of COand reduces labor required for maintenance such as cleaning, and thus enabling a long-term operation. Disclosed is an exhaust gas treatment system equipped with a carbon dioxide removal device, comprising a main ductthrough which an exhaust gas, after treating an exhaust gas from a boilerby a wet desulfurization device, passes; a diverging ductconfigured to diverge some of an exhaust gas flow from the main duct; an COremoval deviceconfigured to absorb and remove carbon dioxide (CO) in the diverged exhaust gas by an amine absorbent; and a return ductconfigured to converge the exhaust gas, from which COhas been removed by the COremoval device, with an exhaust gas that has not yet been diverged, wherein the return duct, before the point where the exhaust gases converge, is provided with heating meansconfigured to vaporize mist of the amine absorbent in the exhaust gas after convergence.