被処理液の処理装置及び被処理液の処理方法

A liquid to be treated that can suppress the occurrence of a short-circuit flow to make the flow state in a reaction vessel more uniform, and can grow crystal particles of a sparingly soluble salt to a size suitable for recovery. and a method for treating a liquid to be treated. At least two or more reaction regions (11a, 11b) having different water flow rates are provided, and a liquid to be treated and a liquid containing ions that react with ions to be removed from the liquid to be treated are passed upward in an upward flow. A reaction section 11 that precipitates ions to be removed in the liquid as crystals of a sparingly soluble salt, and a sedimentation separation section that is continuous above the reaction section 11 and sediments the crystals generated in the reaction section 11 to the reaction section 11 for separation. 12 is a treatment apparatus for a liquid to be treated, which is provided with a reaction tank 1. [Selection drawing] Fig. 1【課題】短絡流の発生を抑制して反応槽内の流動状態をより均一にすることができ、難溶性塩の結晶粒子を回収に適した大きさにまで成長させることが可能な被処理液の処理装置及び被処理液の処理方法を提供する。【解決手段】通水速度が異なる少なくとも2以上の反応領域11a、11bを備え、被処理液及び被処理液の被除去イオンと反応するイオンを含む液を上向流で通水し、被処理液中の被除去イオンを難溶性塩の結晶として析出させる反応部11と、反応部11の上方に連続し、反応部11で生成した結晶を反応部11へと沈降させて分離する沈降分離部12とを備える反応槽1を備える被処理液の処理装置である。【選択図】図1