EDI(Electrodeionization) is the 1 kind of water treatment technology with revolutionary significance. It skillfully combines electrodialysis and ion exchange organically with membrane separation desalination process, which is a high-tech green environmental protection technology. EDI water purification equipment has the advantages of continuous water, no acid-base regeneration and unattended, and has gradually replaced the mixed bed as a polishing equipment in the preparation of pure water system. This technology has good environmental protection characteristics, easy operation and use, more and more recognized by people, and more and more widely promoted in the pharmaceutical, electronic, electric power, chemical and other industries. Up to now, there are more than 3,000 sets of EDI devices in operation in the world, with a total capacity of more than 30000 M/H. Its emergence is a revolutionary progress in water treatment technology, marking the final entry of the water treatment industry into the green industry.
EDI device is used in reverse osmosis system, replacing ion exchange resin, with stable water quality, low operating cost, convenient operation and management, small footprint and so on.
Working principle:
1. The water enters the EDI system and the main part flows into the resin/membrane, while the other part flows along the outside of the template to wash ions out of the membrane.
2. Resin entrapment of dissolved ions in water.
3. Under the action of electricity, the anion moves in the positive direction and the cation moves in the negative direction.
4. Cations pass through the cation membrane and exit the resin/membrane.
5. Anions pass through the anion membrane and are discharged out of the resin/membrane.
6. The concentrated ions are discharged from the waste water flow path.
7. No ionized water flows out of the resin/membrane.
