Title:
Stepwise Development of an Ultra-low NOx Concept with Primary and Secondary Measures in Multi-fuel Biomass Grate Furnaces
Author(s):
Steiner, M., Anca-Couce, A., Nowak, P., Hochenauer, C., Buchmayr, M., Scharler, R.
Document(s):
Paper
Poster
Abstract:
Harmful emissions as NOx are still a major problem in biomass combustion, in particular when using low-grade fuels with a high nitrogen content. Therefore, this study focuses on the stepwise reduction of these emissions with a combination of primary and secondary measures in multi-fuel biomass grate furnaces in the small to medium capacity range. The NOx emissions are reduced by using the promising double air staging technology combined with urea-based SNCR. The residence times in the reduction and SNCR zones are different in the two investigated furnaces, which allows a comparison of changing efficiencies for different configurations of the combined DeNOx concept. The best configuration achieved a NOx reduction of around 80% complying with the Austrian NH3 legal limit, which shows the potential of future furnaces with combined measures to achieve near-zero emissions for a broad range of low-grade biomass fuels.
Keywords:
biomass, fuel, NOx emission, SNCR, urea
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Advanced biomass combustion
Event:
33rd European Biomass Conference and Exhibition
Session:
4BV.1.1
Pages:
718 - 722
ISBN:
978-88-89407-25-7
Paper DOI:
10.5071/33rdEUBCE2025-4BV.1.1
Price:
FREE
