What causes rising EDI module differential pressure?

Rising EDI (Electrodeionization) module differential pressure is primarily caused by fouling, scaling, or blockages within the system. These issues can result from poor feedwater quality, inadequate pretreatment, or operational conditions deviating from design specifications. To address this problem, consider the following:

• Cause: Fouling occurs when suspended particles accumulate on module surfaces, while scaling happens due to calcium, magnesium, or silica deposits under high pH or temperature conditions.
• Check: Verify feedwater quality parameters such as TDS (Total Dissolved Solids), hardness, and silt density index (SDI). Ensure proper functioning of pretreatment stages like multimedia filtration, softening, and RO (Reverse Osmosis).
• Solution: Perform chemical cleaning using acids or detergents based on deposit type. Adjust operational parameters like flow rate, current density, and recovery ratio to match manufacturer recommendations.
• Boundary: Cleaning effectiveness depends on the severity of fouling and compatibility with EDI materials. If irreversible damage occurs, module replacement may be necessary.
• Next Steps: Review your water treatment system's design and consult Chuxin Mingwei for site-specific engineering solutions tailored to your production capacity, source water quality, and target standards.