Power Plant Water Treatment

Power plants are one of the largest industrial water users, with the majority of water used for cooling purposes on site. Along with cooling water, boilers and flue gas desulphurisation (FGD) or wet scrubbing systems also contribute to total water use. Due to the large volume of water required, it is common for powerplants to be located next to natural water sources, such as rivers, where they can draw water into the plant for use.

Power plants are typically required to treat:

  • Source water for use on site (e.g. cooling water or boiler water)
  • Cooling tower blowdown and boiler blowdown for reuse/recycling
  • Wastewater from wet FGD systems
  • Discharged water to comply with environmental regulations

Water Treatment Using CIF®

Our innovative CIF® (continuous ionic filtration) technology provides continuous and concurrent physical filtration and ion exchange, in a single robust and scaling resistant process. It can directly treat FGD wastewater and typically produces product water equivalent to water undergoing lime softening, multimedia filtration, and ion exchange polishing processes. Using CIF®, high water recovery is achieved with cost savings from a reduction in unit processes.

CIF Process2
CIF® Diagram

Water Treatment Using HIROX®

Our HIROX® (high recovery reverse osmosis) technology is an integration of CIF® and RO. CIF® removes scale forming ions to allow the RO to operate closer to the pressure limit, achieving higher system water recovery (typically >95%) and producing a smaller volume of brine. The RO brine is used to regenerate the ion exchange resin in CIF®, providing a chemical free pre-treatment process.

Typical HIROX® Layout

Brine Management using EVAPX™

Our low energy EVAPX™ evaporation and crystallisation technology can treat the highly concentrated brine from reverse osmosis units to provide a zero liquid discharge (ZLD) solution for power plants. EVAPX™ uses a lower temperature dry air stream at ambient pressure to evaporate wastewater, with excellent scaling resistance due to the use of flat plate heat exchangers. Very low operational costs can be achieved with EVAPX™, especially when waste heat is available.

nex process
EVAPX™ Diagram

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