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1. (WO2018051554) METHOD AND DEVICE FOR RECOVERING WASTE WATER FROM INCINERATION PLANT

Pub. No.:    WO/2018/051554    International Application No.:    PCT/JP2017/011130
Publication Date: Fri Mar 23 00:59:59 CET 2018 International Filing Date: Wed Mar 22 00:59:59 CET 2017
IPC: C02F 1/44
B01D 53/50
B01D 53/56
B01D 53/64
B01D 53/68
B01D 53/70
Applicants: KURITA WATER INDUSTRIES LTD.
栗田工業株式会社
Inventors: MIZUSHINA, Keiichi
水品 恵一
HAYAKAWA, Kunihiro
早川 邦洋
Title: METHOD AND DEVICE FOR RECOVERING WASTE WATER FROM INCINERATION PLANT
Abstract:
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.