| 摘要 |
<p>Calcium carbonate particles having a small particle diameter and having excellent reactivity and flowability are used and fluorine-containing water is passed upward through a reaction tower by a once-through operation to thereby effectively remove and recover the fluorine. Disclosed is a method for treating fluorine-containing water which comprises passing the fluorine-containing water upward from a lower part of a reaction tower (1), converting the fluorine contained in the fluorine-containing water into calcium fluoride through reaction with calcium carbonate particles present in the reaction tower (1), thereby removing the fluorine, and taking out the treated water from which the fluorine has been removed, from an upper part of the reaction tower (1), wherein calcium carbonate particles are introduced from an upper part of the reaction tower (1) into the reaction tower (1) through which the fluorine-containing water is being passed. Thus, use is made of not a method in which the fluorine-containing water is passed after calcium carbonate particles having a small particle diameter are packed into the reaction tower (1) to form a packing layer but a method in which calcium carbonate particles having a small particle diameter are introduced from above the reaction tower (1) when the fluorine-containing water is being passed upward through the reaction tower (1). As a result, the calcium carbonate particles can be efficiently reacted with the fluorine contained in the fluorine-containing water.</p> |
