EDI Pure Water Plant for Microelectronics Industry,PH 6-7
EDI is a new desalination process that combines electrodialysis and
ion exchange. This process takes the advantages of electrodialysis
and ion exchange to make up for the shortcomings of the other, that
is, the use of ion exchange energy to deep desalination to overcome
electrodialysis Polarization and incomplete desalination, and the
use of electrodialysis polarization to produce H+ and OH- ions to
generate H+ and OH- ions to achieve self-regeneration of resin to
overcome the defects of regeneration through chemical agents after
resin failure, so EDI technology is a perfect desalination process
.
EDI (Electro Deionization) Inlet Water Requirements
| Item | technical requirements |
| Water supply | RO produces water, conductivity ≤20μs/cm (recommended <10μs/cm) |
| PH value | 6.0~9.0(recommended7.0~9.0) |
| Water temperature | 5~35℃ |
| Hardness (calculated as CaCO3) | <0.5ppm |
| Organic matter | <0.5ppm |
| Oxide | ≤0.05ppm(Cl2),0.02ppm(O3), |
| Fe,Mn | ≤0.0１ppm |
| Silica | <0.5ppm |
| Carbon dioxide | <5ppm |
| Oil and grease | can not be detected |
The main application areas of ultrapure water system equipment are
pharmaceuticals, electronic power, petrochemical smelting, food and
other industries.
EDI technical characteristics
★Continuous production, high water resistivity ≥15MΩ.cm
★Water production rate can be as high as 95%
★Stable water quality. No need for acid-base regeneration
★No sewage is produced.
★The system has a high degree of automation, simple operation and
low labor intensity.
