The Mystery Behind EDI Faults and the Shortened Lifespan of Ultra-Pure Water Equipment

In ultra-pure water systems, EDI (Electrodeionization) technology is one of the core components. However, damage or failure of EDI components not only shortens the lifespan of the equipment but also increases operational costs for businesses and affects production processes. Below is an analysis of the main reasons for the damage to EDI components in ultra-pure water equipment:

Long-term overloading operation

Long-term operation under high current and below rated flow conditions has led to heat accumulation, causing membrane and screen deformation.

Impact: Increased brine pressure differential, resulting in decreased water quality and quantity; in severe cases, it may lead to carbonization and leakage.

Lack of regular cleaning and maintenance

Long-term lack of cleaning and maintenance has led to scaling on the diaphragms and channels, resulting in increased pressure differences between the incoming and outgoing water.

Impact: Decreased water quality from the production, inability to regulate current, and increased voltage.

3. Excessive Oxidizer

Improper control of residual chlorine and other oxidizing agents in the ultrafiltration system led to an excessive amount of oxidizing agents in the EDI process, causing the resin to break.

Impact: Channel blockage, water level decline.

Improper cleaning and disinfection

Improper cleaning and disinfection methods have led to resin breakage and an increased differential pressure between incoming and outgoing water.

Impact: Decreased water quality and quantity of produced water.

5. Powering on under dehydration conditions

Applying power under dehydration conditions led to the carbonization of the membrane and resin due to overheating.

Impact: Cleaning ineffective; unusable.

6. No security filter or inadequate cleaning prior to flooding

No security filter in place or improper cleaning of pipes and water tanks during installation resulted in foreign objects blocking the passageways.

Impact: Increased pressure difference between inlet and outlet, resulting in a significant decrease in water production volume.

7. Product Quality Concerns

Defective products at factory; unexplained water leakage after usage.

Impact: Impacts normal usage.

8. Overvoltage or undervoltage, or improper operation

Current and voltage exceeding rated values or human error in operation.

Impact: Exacerbates equipment damage.

9. Inadequate System Design

The process design does not meet the EDI usage requirements.

Impact: EDI functionality is not fully utilized.

Improper maintenance management

Non-compliance with EDI usage conditions, improper maintenance and management.

Impact: Accelerates equipment aging. By understanding these causes of damage, we can conduct more targeted prevention and management, promptly identify issues, and take actions to ensure the stable operation of ultra-pure water equipment.