Outline

Outline of the System

In the heart of this System, stack, cation-exchange membranes and anion exchange membranes are arranged alternately with ion-exchange resin being packed between them. Stack having electrodes on its both ends is designed to be subject to d.c. voltage.

Features

  1. Capable of producing continuously pure water of which specific resistance is 10 megohm/centimeter or more.
  2. No regeneration chemical is required, because of electrical regeneration process.
  3. Concentrated fluid can be reused.
  4. Operation control and maintenance is easy.
  5. Running cost can be lowered compared with the conventional ion-exchange method.
  6. Unit-designing allows space saving.

Desalination Treatment

Ions in the feed water are absorbed on the ion-exchange resin, moving on the surface of the resin by direct current. Anion permeates through anion ion-exchange membrane and cation through cation-exchange membrane to be discharged as concentrated water. The system produces desalinated water, continuously regenerating ion-exchange resin.

Example of Ultrapure Water System

Although system organization varies depending on the quality of raw water and required quality of water, a typical example is as follows

Application

  • Washing water for semiconductors and electronic parts
  • Feed water for cogeneration
  • Washing water for solar cell panels
  • Water for boilers
  • Water for cosmetics
  • Water for food/refreshments/brewing
  • Water for lenses/plating/painting/precision machinery
  • Medical/pharmaceutical water
  • Other manufacturing water