Electro-Deionization Unit (EDI Unit)
Outline of the System
In the stack, cation-exchange membranes and anion ion 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.
Ions in the raw water are absorbed on the ion-exchange resin, moving on the surface of the resin by direct current. Anion ions permeate through anion ion-exchange membrane and cation ions through cation ion-exchange membrane to be discharged as concentrated water. The system produces pure water, continuously regenerating ion-exchange resin.
Features
- Capable of continuously producing high-purity pure water
Pure water, of which specific resistance is 10 million megohm or more, can be produced continuously. - No regeneration chemical is required
No regeneration chemical is required, because of electrical regeneration process.
Running cost can be lowered compared with the conventional ion-exchange method. - Easy operation control and maintenance
With no regeneration process by using chemicals, operation control is easy. - Space saving
Unit-designing allows space saving installation.
Delivered Electro-Deionization Unit (EDI Unit)
