| 摘要 |
<p>The process involves scrubbing the flue gas and treatment of the discharge from the scrubber in refuse and/or industrial waste incinerators, with wet discharge of the residues of combustion from the incinerator via a wet slag remover added to this. The acid discharge from the scrubber is washed with the alkaline overflow liquour from the wet slag remover and thus neutralised, then the resultant slurry is filtered and part of the filtrate is recycled to the scrubber. Part of the remaining excess filtrate is used to produce the milk of lime used for neutralising the scrubbing liquor and the rest is used to make up the slag liquor in the wet slag remover. The amt. of filtrate recycled to the scrubber is regulated so that the acid discharge is adjusted to a predetermined pH value before neutralisation. Also, the amt. of milk of lime supplied to the neutralisation stage is regulated to that the neutralisation slurry is also adjusted to a predetermined pH value. Atmospheric and water pollution are avoided and disadvantages of conventional processes are eliminated. The pH of the acid liquor from the scrubber can be regulated, so that it contains little CO2, which is not harmful in anyway.</p> |
