| 摘要 |
<p>PURPOSE:To allow an absorbent to absorb an acidic noxious substance contained in waste gas within a short treating time, by a method wherein the absorbent comprising fine particulate quick lime or slaked lime with a particle size of 10mum or less is dispersed in the waste gas containing the acidic substance and the treated gas is subsequently subjected to dust collecting treatment. CONSTITUTION:Powdery quick lime or slaked lime is mutually impinged in a grinder 1 by a jet stream of high pressure air or overheated steam to be finely pulverized. The obtained fine particulate absorbent is introduced into waste gas along with high pressure air or overheated steam in a dispersing machine 2 to be uniformly dispersed throughout the waste gas. The dispersed fine particulate absorbent absorbs the acidic noxious substance in the exhaust gas. As a dust collecting apparatus 3, a bag filter is pref. used. The particle size of the absorbent is pref as small as possible but, with due regard to the operation cost of a jet mill, the absorbent having a particle size of 5mum or less and sharp particle size distribution curve is especially pref.</p> |
