| 摘要 |
<p>PROBLEM TO BE SOLVED: To solve the problems that a flue gas exhausted from a refuse incineration facility sometimes contains dioxins in a high concentration and that the conventional method, wherein the concentration of dioxins in a flue gas is reduced by bringing the flue gas into contact with an adsorbent, e.g. activated carbon, to remove dioxins from the flue gas, has such a problem that the used adsorbent containing adsorbed dioxins must be treated at a high temperature and hence requires special apparatus and process, increasing the treatment cost. SOLUTION: The pretreatment method for a flue gas is characterized in that a water solution containing a reducing agent is sprayed into a flue gas generated during incineration while the temperature of the flue gas is still 500 deg.C or higher to rapidly cool the flue gas. Thus, the formation of dioxins can be inhibited; dioxins formed can be decomposed; and the content of dioxins in the flue gas can be greatly decreased.</p> |
