Question of the Day: Closed Loop Filtration

Published on by in Academic

Why is sidestream filtration important for closed-loop water systems?

Taxonomy

4 Answers

  1. Most closed loop systems (provided they are indeed closed loop, and not semi-open loop through losses), in spite of typically low corrosion rates in these systems, will have some debris and depending on the treatment option selected some corrosion product "throw".  The particulate matter cant settle into low flow areas or dead legs, resulting in accelerated corrosion under deposit.  Mainstream filtration represents a significant energy loss to the system over time, especially when differential pressures are not kept low.\

    Side stream filtration with the correct media will improve system long-term performance, result in lower net energy losses in pumping, and as long as properly changed when back pressure is rising (if it is set up to be observable), or changed in a preventative maintenance schedule, then all is well.

  3. In addition to side stream filtration the Watercube treats minerals in water mitigating scaling issues on the tower fill, the tower basin and downstream equipment utilising the closed loop water.  The Watercube can be supplied with chemical injection ports and 316SS static mixer insuring the product being injected is thoroughly mixed in the softer water. Alternatively UV can be added in place of the 316SS injection ports & mixer or installed as a pretreatment to for further legionella control.  Contact me for further information.

     

  4. Suspended solids, if not removed via filtration and or system turnover, will deposit in low flow areas of the system and provide a supportive environment for underdeposit corrosion.  In addition to the corrosion threat, the deposit matrix provides a shelter for microbiological growth, which can accelerate both corrosion and deposit formation.