Method of and apparatus for controlling pH and/or electric conductivity of water using ion exchange resin.

摘要

Water is allowed to flow in parallel into a mixed bed 3 in which an anion exchange resin and a cation exchange resin are accommodated in a mixed state and into a single bed 4 in which an anion exchange resin or a cation exchange resin is accommodated. As the proportion of the flow-rates of water introduced into the two beds is adjusted, the pH and electric conductivity of water issuing from them is controlled. Control is effected in such a manner that the pH and electric conductivity of water are maintained at appropriate levels without using any chemicals.