Demineralisation

demineralisation1

Demineralisation is the process of removing anions and cations from water to produce pure water. This can be achieved by reverse osmosis, ion-exchange resin beds or distillation.

Demineralised water is commonly utilised for scientific and industrial purposes. Major uses include, but are not limited to:

  • Electronics manufacturing
  • Pharmaceutical manufacturing
  • Laboratories
  • Boiler feed water
  • Automotive manufacturing

Hydro Flow can design, commission and service demineralisation water plants to suit all needs.

 

Reverse Osmosis

demineralisation2Reverse osmosis (RO) is a water purification technology that treats high pressure water systems through a semipermeable membrane. RO is typically used for drinking water and ultra-pure water purposes, and is commonly used for water recycling.

Accumulation of organic and inorganic matter on the polyamide structure of the membranes will reduce the recovery rates, performance and flow throughput. The servicing of an RO system includes monitoring levels and cleaning.

 

Mixed Bed Ion Exchange

demineralisation3Mixed bed ion exchange uses a combination of cation and anion resin to remove dissolved solids. The solids are replaced by hydroxide and hydroxyl ions which combine to produce high purity water. Over time these units can experience problems with resin fouling and breakdown, loss of regeneration capacity and overall reduced system throughput. Valves and seals also require regular checking and replacement. Servicing mixed bed ion exchange systems involves the removal of resin foulant and accumulated suspended solids, checking of all backwashing and regeneration sequences and associated valving, and checking of regenerant uptakes and flow rates. Partial or complete resin replacement may also be required.