Processing system and coal gasification wastewater treatment method of coal gasification wastewater

摘要

Efficient removal of cyanide compound, fluorine compound, selenium compound, ammoniacal nitrogen and COD component contained in coal gasification waste water, good quality of treated water, low content of harmful substances of generated sludge, waste disposal The coal gasification wastewater treatment system is easy to provide. A high temperature alkali chlorine treatment apparatus 10 for decomposing at least cyanide compound, ammoniacal nitrogen and COD component by a high temperature alkali chlorine treatment in which an oxidizing agent is added and reacted under heating, at least one treatment of coagulation sedimentation treatment and adsorption treatment A selenium processing apparatus 52 for removing a selenium compound by at least one of a reduction removal treatment for removing a selenium compound reduced after reduction of a selenium compound and a adsorption treatment , And a fluorine treatment apparatus 50 and a selenium treatment apparatus 52 at the subsequent stage of the high temperature alkali chlorine treatment apparatus 10.