| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a stable desulfurization performance by preventing an absorption solution circulation pump from taking in bubbles of blown air and preventing cavitation from being formed in the pump. SOLUTION: An inlet duct and 2 and an outlet duct 3 of a waste gas are installed in the upper side of a circulation tank 6 for storing an absorption liquid in an absorption tower, the absorption tower is divided with a partitioning plate 4 into an upward current region 19 in the waste-gas introduction side where the waste gas flows upward and a downward current region 20 in the waste gas discharge side where the waste gas flows downward, and SOx in the waste gas is treated by brining the waste gas into contact with the absorption liquid by spraying the absorption liquid in the respective regions. At that time, air C for oxidization is blown more in the liquid in the circulation tank 6 under the inlet duct 2 side than in the liquid in the circulation tank 6 under the outlet duct 3 side. The amount of the sprayed absorption liquid from spray nozzles 16A of the upward current region 19 is set to be higher than the amount of the sprayed absorption liquid from spray nozzles 16B of the downward current region 20 and the absorption liquid is taken more out of the circulation tank 2 in the inlet duct 2 side than out of the circulation tank 6 in the outlet duct 3 side.</p> |
