| 摘要 |
PURPOSE:To reduce the cost of discharging the surplus and to reutilize the waste heat by adding a flocculant to a waste processing soln. to separate the soln. into the precipitate and supernatant liq. and utilizing the heated gas generated when a solvent used in heating the supernatant liq. is vaporized, air-cooled and liquefied to dry the precipitate. CONSTITUTION:The floc in a waste soln. in a flocculation tank 2 flocculated by addition of a flocculant is separated from the supernatant liq., and the precipitate is dropped into an evaporating dish 6. The supernatant liq. is sent to an evaporator 20 and heated, the vapor is sent to an air cooler 30, and the condensate is accumulated in a liq. receiver 40. The air used in the cooler 30 and heated to a high temp. is injected into the dish 6 from a tiny hole 32a, and the precipitate is heated. The evaporation from the precipitate is accelerated by the air from an air suction port 10 in the upper space of the dish 6, and the precipitate is dried. Consequently, the surplus (flocculated precipitate and concentrate) is discarded at a lower cost, and the waste heat is reutilized. |
