METHOD AND DEVICE FOR PREPARING DEIONIZED WATER

摘要

PROBLEM TO BE SOLVED: To provide an electric regeneration type method and device for preparing deionized water, capable of suppressing an increase in voltage and performing operation free from a decrease in the specific resistance of the deionized water over a long period. SOLUTION: The deposition and accumulation of hardness components on the positive electrode side surface of anion exchange membrane is prevented by filling a concentration chamber with a cation exchangers having an oppositely charged layer.