Scale inhibitor, scale prevention device and scale prevention system using the same

摘要

A scale inhibitor includes a granular material composed of a particle containing a plurality of polyphosphate salts, the granular material has an asymmetric particle diameter distribution, and a particle diameter with a maximum frequency is smaller than an average particle diameter of the granular material. Thus, when the flow rate of treat water flowing through the scale inhibitor is low, the concentration, at which the scale inhibitor is dissolved in the treat water, can be reduced. Consequently, the scale inhibitor is not consumed wastefully, and the life of the scale inhibitor can be extended. In addition, it is possible to reduce the frequency and maintenance cost of maintenance such as replacement or replenishment of the scale inhibitor.