EDI purified water equipment is currently a water production equipment in the fields of electronic devices, chemical plants, electroplating processes, food, and many tap water bodies with high regulations. It has extremely low energy consumption during operation and does not discharge strong acid and strong alkali wastewater. Although the investment in machine equipment projects will be higher, the cost of maintenance and upkeep in the middle and later stages is relatively low. Do not use strong acid and strong alkali for reconstruction.

1. Source water: The source water body has undergone a transformation, and the high oxidation-reduction potential of the source water naturally affects the water production.

2. Preparatory treatment: The water treatment filter and activated carbon filter were not immediately backwashed on time.

3. The original RO reverse osmosis membrane is damaged or has exceeded its service life

4. The multi-media filter for RO seepage is dirty and blocked.

5. When the desalination rate of RO decreases and the water production rate decreases by 10% or the working pressure of RO seepage increases by 10%, is it necessary to immediately carry out cleaning.

6. The conductivity of the effluent from the edi system software will become unstable with the change of electrical flow rate due to the different inflow and outflow quantities. This is because in the power circuit, the resin phases of the aqueous solution in the dilution chamber are connected in series, because the conductivity of the added ion exchange resin far exceeds the water production capacity of the electrodialysis method. Therefore, the resin phase resistor becomes a decision-making factor for the size of the dilution chamber resistor. The key to positive ion transport is based on the resin phase, and within a certain range of total water flow rate, the total flow rate has little harm to the resin. Therefore, there is no significant change in the total current of the edi membrane stack, and the change in the conductivity of the produced water is also not significant. Therefore, the harm of the inflow and outflow water to the water body is relatively small.

7. The harm of operating voltage to the conductivity of effluent is also significant. If the operating voltage is too small, positive ions cannot be removed from the dilution chamber before the pure water is discharged. The entire process of electrodialysis and resin electro regeneration is relatively weak. At this time, the key is to carry out the entire process of ion exchange method. With the increase of operating voltage, the hydrolysis reaction becomes more horizontal, and the resin regeneration effect is very good, which leads to a decrease in the conductivity of water. When the operating voltage is raised to a certain level, the entire process of ion exchange method and resin regeneration is balanced, and the conductivity of water production is further reduced and remains stable. However, excessive operating voltage can cause excessive water ionization and positive ion backpropagation, resulting in a decrease in water production. Therefore, it is proposed that EDI operate at a moderate voltage.

The EDI ultra pure water system production line equipment is one of the popular production and manufacturing machinery and equipment in the field of tap water at present. With the continuous development of high-tech, it is also a key commodity for water purification equipment in the next two years. Therefore, when the machinery and equipment funds are invested in production and manufacturing, strict operation and maintenance must be carried out according to the operation steps of the machinery and equipment to ensure the normal operation of all machinery and equipment.

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