US 7,452,463 B2 · Apparatus for treating water

Abstract

Provided are a treatment apparatus for removing fluorine content from water to be treated and a method of treating water to be treated using the same. Water to be treated, containing fluorine, is introduced into a treatment tank over a first path. Slaked lime is added to the water to be treated over a second path. Calcium chloride is added to the water to be treated over a third path. Thus, the fluorine contained in the water to be treated combines with calcium forming slaked lime or calcium chloride, thus yielding calcium fluoride, which is immobilized. When a filter film immersed in the water to be treated is used for filtration, the calcium fluoride contained in the water to be treated is concentrated.

Claims5

Dependent claims

A treatment apparatus comprising:

a treatment tank configured to receive water comprising fluorine;
a supplying device configured to add calcium to the treatment tank so as to form calcium fluoride in the water;
a filter film disposed in the treatment tank and configured to filter the water so as to leave the calcium fluoride in the treatment tank, the filter film comprising a self-developed film comprising the calcium fluoride;
and
a storage tank configured to store temporarily filtered water from the treatment tank and placed above a water level of the treatment tank so that the stored filtered water is allowed to flow back to the treatment tank so as to peel off the self-developed film from the filter film.

2 more elements

Dependencies are inferred from the claim text.

Apparatus for treating water

Life of this patent

Apparatus for treating water

Life of this patent

Abstract

Claims5