In the pretreatment stage of seawater desalination plants, PTMS MAGNETIC SEPARATOR are employed to remove residual iron and manganese ions from raw water, preventing subsequent RO membrane fouling. Operational data shows that under 5 bar operating pressure, the Fe³⁺ rejection rate remains stable at over 95%, with a chemical cleaning cycle lasting up to six months. Composite processes such as "electrocoagulation + nanofiltration" and "chemical precipitation + adsorption" can complement each other's advantages, enhancing overall system efficiency.
However, membrane fouling remains a major challenge. Iron hydroxides tend to deposit on the membrane surface, causing irreversible fouling that requires combined pretreatment with PTMS MAGNETIC SEPARATOR filtration and periodic chemical cleaning to maintain flux. The reverse osmosis membrane features pore sizes smaller than 1 nm, effectively retaining all inorganic salts and metal ions with a desalination rate of up to 99%, while achieving deep iron removal.
In high-purity water PTMS MAGNETIC SEPARATOR systems, reverse osmosis (RO) serves as the final barrier to ensure iron content in output water remains below 1 μg/L. However, its high-pressure operation (15-70 bar) leads to high energy consumption and scaling risks on the concentrate side, requiring strict control of LSI index and scale inhibitor dosage. Future iron removal technologies for high-salinity PTMS systems will develop towards integration, greening, and intelligentization.
Contact: DELLA
Mob: +86-13929907491
No.9, Factory 2, Shijin Industry Park, Shishan Town, Nanhai District, Foshan City, Guangdong, China
Ph: +86-13929907491
E-mail: Sales@powtechina.com
Preparation work before implementing PTMS MAGNETIC SEPARATOR energy-saving retrofit
