PGE Energia Ciepła Krakow, Poland, Biomass co-firing 2009 - 2010

After Fortum's project, Krakow CHP plant's NOx emissions were significantly decreased due to fuel change from hard coal only to hard coal and biomass co-firing.

PGE Energia Ciepla Krakow

Description of the project

Fortum has supplied NOx reduction project to Krakow CHP power plant in Poland. Boiler K2 has been modified by substituting 35% of the hard coal fuel with biomass. Different biomass qualities including wooden biomass and agro biomass pellets were fed into the boiler. Fortum' project has provided for biomass co-firing possibility which reduces NOx emissions by 20 - 30%.

Fortum's contribution

  • Dual-fuel low-NOx burners equipped with biomass co-firing possibilities
  • OFA air system
  • Boiler silo and feeding silos for each burner level
  • Biomass receiving station and storage silos
  • Biomass crushers and feeding

Customer benefits

  • 20 - 35% coal was substituted with biomass by energy basis
  • NOx emission was decreased 20 - 30%
  • With biomass, NOx emission reached 220 - 270 mg/Nm3
  • UBC in the fly ash was same or even reduced with biomass co-firing
  • Combustion control by burners
  • Suitable mix of different kind of biomass
  • Flame was very bright and stable
  • Boiler behavior was normal
  • No slagging and fouling was observed during commissioning of the biomass system
  • No negative effect on coal firing and 100% coal capacity remains



  • Power plant: PGE Energia Ciepła Krakow (Hard Coal)
  • Location: Krakow, Poland
  • Power output: 4 x 120 MW
  • 4 x 380 t/h tangential firing boilers
  • Commercial operation: 1970
  • Customer: PGE Energia Ciepła S.A
  • Project duration: 2009-2010
  • Services: fuel change from hard coal to biomass