| 摘要 |
<p>An apparatus for recovering potassium sulfate which has a gas absorbing unit (3) wherein a flue gas is contacted with an absorption liquid having ammonia dissolved therein, an introduction means which introduces an absorption liquid (13) from the gas absorbing unit (3), which has absorbed the flue gas, an introduction means which introduces potassium chloride (16), and a mixer/crystallizer (6) wherein the introduced absorption liquid and potassium chloride are admixed in an aqueous system to thereby crystallize potassium sulfate. Alternatively, ammonia may be directly injected into the flue gas, and the resulting reaction product may be admixed with potassium chloride in an aqueous system in the mixer/crystallizer. The apparatus and a method using the apparatus can be used for recovering potassium sulfate from a flue gas using potassium chloride being inexpensive.</p> |
