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Water treatment for Combined Cycle Gas Turbine

Reference ID: 109980
Industry: Heat and power plants
Application: Boiler water, District heating water

EUROWATER has supplied water treatment plant for one of Poland's largest Combined Cycle Gas Turbines with a generation capacity of 400 MVe and 240 MWt, located in the town of Stalowa Wola.

This project is one of the first state-of-the art large CCGT gas fired power projects in Poland and part of Poland's drive to reduce reliance on use of coal for power generation.

The water treatment plant is designed and built to supply make-up water for high-pressure boilers as well as feed water for the district heating network.

The water source is a river. First step of treatment is coagulation and flocculation followed by sand filtration. EDR unit (electrodialysis reversal) as partial desalination plant is used afterwards.

Hereafter the water undergoes membrane filtration on double pass RO unit. Pretreatment to DPRO is antiscalant dosing and NaOH is dosed between the RO stages to bind free CO2. Finally, the water is polished on EDI in order to reach ultra-pure water.

Additionally fully automatic CIP system is available to make easy cleaning of RO membranes when needed. The plant can operate with flexible output due to VFD controlled RO pumps.

Technical data

  • Silica: < 3 ppb (limit 20 ppb)
  • TOC: < 10 ppb (limit 100 ppb)
  • Flow: 3 x 25 m³/h

Units in plant

  • Antiscalant dosing
  • Double Pass Reverse Osmosis, 3 x DPRO C4-28/20
  • Electrodeionization unit, 3 x EDI 4 x 5000e
  • Automatic CIP unit