EDI is a standardized method of electronic data exchange that combines the advantages of electrodialysis and mixed bed ion exchange, while addressing their respective shortcomings. It can use ion exchange for deep processing without the use of chemicals. Reuse the H+and OH - generated by ionization to achieve the purpose of resin regeneration. EDI has high requirements for incoming water, which must be reverse osmosis water or water quality equivalent to reverse osmosis water.
EDI module blockage refers to a problem with a module or component in the EDI system, which prevents normal data exchange. Here are some possible reasons for EDI module blockage:
The quality of the incoming water does not meet the minimum requirements of the EDI module for incoming water.
2. Insufficient control of residual chlorine and other oxidants, as well as excessive intake of oxidants in the EDI module, can damage the resin in the EDI module, block the water generation channel, and reduce the amount of water discharged.
3. The EDI resin is damaged, causing an increase in the water pressure difference between the inlet and outlet, resulting in a decrease in the quality of the produced water.
4. The activated carbon has not been replaced for a long time, and the addition of reducing agent is unreasonable, resulting in excessive residual chlorine.
5. The EDI module works under high current for a long time, which cannot dissipate the accumulated heat, causing the modules near the EDI pole to heat up and deform, increasing the EDI concentration pressure difference and reducing the quality and quantity of the produced water.
6. There is no safety filter before water enters the EDI module. As a result, foreign objects directly blocked the EDI channel, increasing the pressure difference between inlet and outlet water, leading to a serious reduction in the amount of extracted water and poor cleaning effect.
7. Insufficient pre-treatment (softener, sulfite addition system, reverse osmosis, etc.), control system failure/malfunction (safety interlock device, low flow protection issue), improper system design (water initially generated by reverse osmosis is discharged), etc.
8. Using inappropriate cleaning disinfectants can directly damage and destroy the EDI module, increase the pressure difference between the inlet and outlet water, and thus reduce the quality and quantity of the produced water.
If the EDI system is manually operated and the power is turned on when there is insufficient water, the modules and resin will heat up and carbonize, rendering cleaning ineffective and unusable.
EDI module blockage may be caused by various reasons and requires comprehensive consideration and corresponding measures to be taken to solve it. This requires comprehensive monitoring, maintenance, and optimization of the EDI system, while collaborating with relevant parties to solve problems