| 摘要 |
The present invention provides a composite filter comprising: a crystal generation catalyst filter part formed so as to promote the reaction of hardness materials or scale-causing materials, which are present in feed water, with bicarbonate anions and to remove the hardness materials or the scale-causing materials from the feed water by means of crystallization; and an ion exchange resin filter part formed at a downstream side of the crystal generation catalyst filter part so as to filter the feed water, which has passed through the crystal generation catalyst filter part, and to remove the hardness materials or the scale-causing materials from the feed water by means of ion exchange. |
