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