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
Facts
- 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