EDI Principle:
 EDI  （China） ,also named as  continuous electrodeionization EDI （Electrodeionization abbreviation）, uses the  mixed bed ion exchange resin  to adsorb  the cation-anion in water, while the adsorbed ion again in the role of DC voltage, respectively permeability over anion and cation-exchange membrane to be removed . This new technology can replace the traditional ion exchange （DI）, output of more than 15MΩ.cm ultra-pure water.
biggest advantage could be a long-term stable operation without the need for regeneration of anion and cation acid-base resin,.And is very suitable for making water 100L / h and above the central preparation of ultrapure water systems, which can reduce operating costs and make TOC be lower and more stable. Yongjieda's devices typically production water resistivity is about 15 ~ 18MΩ.cm.
（Elcctrodeionization） is  pure water manufacturing technology which combine the ion-exchange technology, ion-exchange membrane and ion technology, and electromigration. It is clever to combine electrodialysis and ion exchange technology. In the use of high-voltage electrodes at both ends making the water charged ions move, combined with ion-exchange resins and ion-selective resin film to accelerate ion removed, so as to achieve the purpose of water purification. In the desalting process, the ions in the electric field is cleared through ion-exchange membrane. Meanwhile, the water molecules in the electric field  produce hydrogen ions and hydroxide ions .Then  these ion-pairs  continuous regenerat  ion exchange resins in order to maintain the optimum ion-exchange resins.

Hangzhou Yongjieda purification technology module Features:

1. Don’t need acid-base regeneration: In the mixed-bed resin, acid-base need chemical regeneration, while the is able to eliminate the handling of these hazardous substances and  reduce heavy work. Protect the environment.
2.  Continuous, simple operation: In the mixed bed regeneration , water quality change constantly, so that operation becomes complicated.While water production process is stable continuous and production water is constant.There is no complex operating procedures!
3.  Reduces installation requirements: Compared with the mixed-bed, module is less volume, which is building-block structure.

Hangzhou Yongjieda  module Benefits:

1. Producing water of high and stable.
2. Uninterruptedly producing water.
3. Don’t need regeneration of chemicals.
4. Thoughtful stack design, small Volume
5. Operation Simple and safe
6. Low running costs and maintenance cost
7. Don’t need acid-base reserves and transportation costs.
8. Fully automatic operation, without hand care

Application Areas:

1. Chemical water treatment plant
2. Electronics, semiconductor, precision machinery industry, ultrapure water
3. Food, beverages, drinking water preparation
4. Small-scale water stations, groups, drinking water
5. Fine chemicals, fine sharp discipline of water
6. The pharmaceutical industry process water
7. Sea water, brackish water desalination
8. Other industry's need for preparation of highly pure water