Title:
Performance and Evaluation of Combustion Tests on Raw and Torrefied Biomass Fuels: Application in Small and Medium-Scale Domestic Furnaces
Author(s):
Kienzl, N., Kourkoumpas, D-S., Isemin, R., Mikhalev, A., Milovanov, O., Strasser, C., Margaritis, N., Klimov, D., Grammelis, P.
Document(s):
Paper
Poster
Abstract:
The aim of the paper is to describe an integrated approach in order to enhance the utilization of various types of biomass feedstock, such as straw, sunflower and millet husks in residential/communal heating applications. Since this biomass has no favorable properties for a direct utilization, a pre-treatment via torrefaction and subsequent densification/pelletization is carried out. Therefore combustion tests in a grate furnace and in a Fluidised Bed furnace (BFB) provide an important feedback for the optimization of the fuel processing. The purpose of these experiments is to assess the influence of torrefaction on the combustion behavior of the fuels tested and to evaluate their applicability in domestic furnaces. First results show that for sunflower husks (both raw and torrefied) in a commercial boiler <400 kW operated in a mode with low primary zone temperatures (<850°C) the current Austrian emission limits are met. For the future upcoming emission limits according to the Medium Combustion Plant (MCP) Directive additional measures will be needed to comply with the limits of dust. BFB boiler tests show that during combustion of torrefied sunflower husk pellets, reduction in O2 (1.5-1.7 times), CO (2 times) and NOx (1.7 times) concentrations is achieved compared to the combustion of “raw” pellets.
Keywords:
biomass, combustion, pellet, torrefaction, sunflower husk
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Biomass and bioliquids combustion for small and medium scale applications
Event:
26th European Biomass Conference and Exhibition
Session:
2BV.4.15
Pages:
655 - 660
ISBN:
978-88-89407-18-9
Paper DOI:
10.5071/26thEUBCE2018-2BV.4.15
Price:
FREE
