| 摘要 |
<p>PURPOSE:To disperse slurry uniformly by providing an oxidation stirrer on the top of a circulation tank, and a stirrer for prevention of solids precipitation at the bottom of said tank, and supplying an absorbent slurry to a stirred flow generated by the stirrer at the bottom of the tank. CONSTITUTION:Exhaust gas 1 is conducted to a desulfurization tower 2 and desulfurized by contacting an absorbent slurry. The slurry accumulates in a circulation tank 4. Air is supplied to the top of the circulation tank 4, and fine bubbles are generated by an oxidation stirrer 11 to oxidize slurry to produce gypsum. A stirrer 12 for prevention of precipitation is provided at the bottom of the circulation tank 4, and slurry is supplied to the upstream side of a slurry flow from a supply pipe 20A located behind the stirrer 12, and dispersed uniformly. As a vertical circulation flow does not generate so much, a low pH slurry zone at the top is protected satisfactorily to increase the oxidation efficiency of CaSO3.</p> |
