| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method of desulfurization waste water treatment capable of reducing steps thereof, and provide a device using the same. SOLUTION: This method comprises the steps of neutralizing SO3 in an exhaust gas with ammonia by spraying, absorbing and removing SO2 in the exhaust gas by contacting said exhaust gas with a slurry comprising magnesium hydroxide as an absorbent, adding lime to the SO2-absorbed desulfurization waste water to prepare the waste water comprising ammonia, gypsum and magnesium hydroxide, and simultaneously separating the resultant waste water, recovering gypsum and using magnesium hydroxide in desulfurizing SO2 and ammonia in neutralizing SO3.</p> |
