Industrial

Back to sectors
Industrial Case Studies

Delta Electricity – Australia


Veolia Water Technologies was contracted by Delta Electricity to provide the design, supply, construction, testing and commissioning of the Munmorah Power Station Water Treatment Plant (WTP), to operate in conjunction with an existing facility.

Project Background

Delta key figures
2 ML/day - High purity water - Mixed bed demineralisation unit

New South Wales, Australia – Delta Electricity is a wholesale electricity generator, with four major power stations located on the Central Coast (Munmorah& Vales Point power stations), and in the Western region (Mt Piper & Wallerawang power stations).

Delta’s business practices focus on providing cost-effective, safe and reliable electricity, with a strong commitment to sustainable development and minimal environmental impacts.

 

The Client’s Needs

Munmorah Power Station operates on the coastal strip between the Tuggerah Lakes, close to the Central Coast beaches, about 110 km north of Sydney. It is a very popular tourist area with important scenic and environmental attractions. Tourism and coal mining are the major local industries.
 
  • Remove chlorine, organic matter and electrolytes which are dissolved in the feed raw mains water.
  • Provide high quality purified demineralised water for boilers within the Munmorah Power Station.
  • Reduce water consumption, and save time and money.
  • Provide a technology that reduces water consumption yet still provides high-purity water, to save time and money.
 

Project & Technology Solutions

Veolia Water Technologies was contracted by Delta Electricity to provide the design, supply, construction, testing and commissioning of the Munmorah Power Station Water Treatment Plant (WTP), to operate in conjunction with an existing facility.

The WTP will be able to treat up 2,160 kilolitres/day of raw mains water to provide the boilers cooling towers with high purity clarified raw water.

It comprises of:
 
  • Carbon Filter/Break Tank
  • Counter-current Regenerated Carbon Exchanger
  • Counter-current Regenerated Anion Exchanger
  • Mixed Bed Demineralisation Unit

Raw mains water is fed into the carbon filter/break tank vessel where chlorine and organic matter is removed by the carbon media. Ion exchange using cation and anion resins remove electrolytes which are dissolved in the water.

The anion uses a combination of weak and strongly basic ion exchange resins.

 

Process Description

Mixed bed demineralisers provide extremely high purity water. The bed consists of both strong acid cation and strong base anion resins. The effect is similar to that of passing water through a chain of alternate individual cation and anion exchanger units.

The plant includes all the necessary equipment for safe and efficient operation, control, monitoring and protection of the plant. Control of the plant is via a PLC system, with local process control and monitoring done by a ‘CiTect’ SCADA system.
 
  • 1 x 100% Carbon Filter/Break Tank.
  • Stainless steel 2400mm x 3000mm with PVC internals, the carbon filter/break tank is fully automated. Backwashing of the activated carbon media is done every 55 hours, and takes approximately 14 minutes.
  • 1 x 100% Cation and Anion Units.
  • The weak/strong acid cation resins replace cations in the water with H+ ions. Weak/strong base anion resins replace anions in the water with OH-ions. The regenerants used to free the ion exchange sites on the resin beads are sulphuric acid (H2SO4) for the cation exchanger, and sodium hydroxide (NaOH) for the anion exchanger. These resins have a usual life of up to 5 years.
  • 1 x 100% Mixed Bed Demineralisation Unit.
  • Provides extremely high purity water with almost complete removal of electrolytes. Total solids in the effluent water is well below 1ppm 
Delta process description