combines the techniques of electrodialysis and ion-exchange to selectively transport anions and cations through ion-exchange membranes and exchange ions with ion-exchange resins, achieving deep desalination of water under the action of a direct current electric field. The hydrogen ions and hydroxide ions produced by water electrolysis regenerate the ion-exchange resin, allowing continuous production of ultra-pure water without the need for chemical acid-base regeneration.
Working principle of EDI system:
1. RO-produced water is evenly distributed into the desalination compartment after entering the EDI module.
2. The residual ions not removed by the RO membrane are absorbed by the ion-exchange resin in the desalination compartment.
3. The direct current electric field applied to the two electrodes of the EDI module drives the anionic and cationic ions in the desalination compartment to migrate to the corresponding electrodes in the concentrate compartment, thereby producing high-purity water.
4. Under the action of the electric field, water molecules are ionized into H+ and OH- in large quantities, thus continuously regenerating the ion-exchange resin.
Main features of EDI ultra-pure water equipment:
1. High water quality and excellent stability of produced water.
2. Continuous and uninterrupted water production without interruption due to regeneration.
3. Modular production and fully automatic control.
4. No need for acid-base regeneration and no wastewater discharge.
5. No need for acid-base regeneration equipment and chemical drug storage and transportation.
6. Compact equipment structure with small footprint.
7. Low operating and maintenance costs.
8. Simple operation and low labor intensity.
Post time: Apr-07-2025