| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for producing a solidified body by mixing, with a solidification assistant, a waste water, evaporated and condensed with an evaporator, after discharged from a waste gas desulfurization facility for absorbing and separating sulfur oxide gas in a combustion waste gas by using an alkaline agent as an absorbent. SOLUTION: A solid-liquid separator 12 for subjecting gypsum to solid-liquid separation is provided in a line for extracting a concentrated waste water drained from an evaporator 2, and the gypsum in the outside concentrated waste water is separated and collected by the solid-liquid separator 12 and all or a part of the collected gypsum is supplied to the evaporator or added to the waste water fed to the evaporator, and remaining part of the collected gypsum is discharged out of a system or is returned to a desulfurization facility so as to be collected together with gypsum produced in the desulfurization facility. Vapor produced in the evaporator 2 is condensed and collected and the evaporator 2 is periodically cleaned with collected water. All or a part of the gypsum collected by the solid-liquid separator 12 may be crushed and then added to the evaporator 2 or to waste water supplied to the evaporator 2.</p> |
