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|1. (WO2018051554) METHOD AND DEVICE FOR RECOVERING WASTE WATER FROM INCINERATION PLANT|
|Applicants:||KURITA WATER INDUSTRIES LTD.
|Title:||METHOD AND DEVICE FOR RECOVERING WASTE WATER FROM INCINERATION PLANT|
The present invention efficiently recovers heat from flue gas in an incineration plant and to achieve stable and efficient treatment of the flue gas. Waste water discharged from an incineration plant is subjected to water treatment by a water treatment device 6, the incineration plant being equipped with: an incineration device 1; a heat recovery device 2 for recovering heat from flue gas; a temperature lowering device 3 for further lowering the temperature of the flue gas having undergone heat recovery at the heat recovery device 2; a dust collector 4 for removing dust from the flue gas having undergone temperature-lowering; and a catalytic denitrification device 5. The treated water is delivered to the temperature lowering device 3 and injected into the flue gas so as to be evaporated to achieve lowering of the temperature of the flue gas. A control device 7 controls the amount of water to be delivered from the water treatment device 6 to the temperature lowering device 3 so that the temperature of the flue gas at the outlet of the temperature lowering device 3 is 150-200°C.