Working principle of EDI system
EDI system is a scientific water treatment technology that mainly uses a direct current electric field to guide the movement of medium ions through a partition in water, and selects ions through an exchange membrane to purify water quality. The pair of electrodes in an electrodialysis device are often alternately arranged by negative membranes, forming a membrane separator (A and b) with a concentration chamber and a dilution chamber (i.e. cations can pass through the accumulated membrane and anions can pass through the negative membrane). The cations in the thin cavity water migrate from the positive membrane to the negative membrane and are intercepted by the negative membrane in the concentrated cavity; Anion migration in water passes through the eliminated membrane and intercepts the positive facial mask concentration chamber. The number of such ions in water gradually decreases when they penetrate the thin chamber and become fresh water, while the concentrated water chamber becomes the concentrated water. As the positive and negative ion concentration chambers continuously flow into the concentrated water, the concentration of dielectric ions increases continuously, so as to achieve the purpose of chemistry, purification, concentration or purification.

The reverse osmosis system uses EDI equipment instead of traditional mixed bed ion exchange technology to produce stable ultrapure water. Compared with mixed ion exchange technology, EDI technology has the following advantages:
1. Stable water quality
2. Easy to achieve fully automatic control
3. Will not shut down due to regeneration
4. No need for chemical regeneration
5. Low operating costs
6. Small footprint
7. No sewage discharge