Title:
Applicability and Slag Formation Survey of Different Biomass Fuel Qualities in Small Scale Combustion: A Substudy in the EU FP7-SME Project Ashmelt
Author(s):
Schwabl, M., Feldmeier, S., Nagelhofer, K., Wopienka, E., Haslinger, W.
Document(s):
Paper
Poster
Abstract:
In the future pellet market, different fuel qualities like agricultural biomass (e.g. miscanthus, straw) but also different wooden biofuels (e.g. short rotation coppice, wood thinning and waste wood) will be introduced. For the application in small scale combustion systems one major issue is the slag formation tendency of the respective fuel. At the moment a majority of the combustion systems allow the use of DIN+ or ÖNORM pellets exclusively, without losing the warranty of the boiler manufacturer. But even those standards do not reflect the slagging tendency of a fuel. The purpose of the presented work is therefore a survey of the slagging tendency and the applicability of different biomass fuel qualities in a commercially available combustion system. Combustion tests with 14 different fuels of wooden and agricultural biomass in a 15 kW boiler system using a horizontally moving grate were conducted. The applicability and the slagging tendency of the fuels were determined by evaluating the impact on the combustion system (limitations to power output, emission release, test duration until operational problems,…) and the severity of slag formation (share of slag, hardness,…). A correlation analysis of severity and applicability of the fuels allows a prediction, which fuel quality can be applied reliably to the combustion system. The considered combustion systems showed to be significantly influenced by fuels, forming sintered ashes. The results of this work will allow a correlation of the practical slag forming tendency and the respective applicability curve for a certain combustion system with results of an upcoming laboratory test for slag formation tendency within the EU FP7-SME project AshMelT.
Keywords:
biomass, combustion, pellet, small scale application, ashes
Topic:
R&D on Biomass Conversion Technologies for Heating, Electricity and Chemicals
Subtopic:
Solid biofuel combustion for small and medium scale applications
Event:
21st European Biomass Conference and Exhibition
Session:
2DV.3.32
Pages:
1156 - 1159
ISBN:
978-88-89407-53-0
Paper DOI:
10.5071/21stEUBCE2013-2DV.3.32
Price:
FREE
