Title:
Pre-Treatment of Biomass by Rolling - a Combined Experimental and Numerical Analysis
Author(s):
Hansen, K.S., Ravn, C., Nielsen, E.K., Koch, T., Porte, C., Christiansen, P., Rasmussen, A.A., Bay, N.
Document(s):
Paper
Slide presentation
Abstract:
Pre-treatment of bulk straw material by rolling is studied as a possible method to prepare for subsequent biogas production. A combined experimental and theoretical study is presented. A pilot rolling mill with a double screw feeder is designed and constructed for crushing of bulk straw. Experiments show that the roll speed and the roll reduction should be chosen within a specific range depending on the injection screw speed to avoid blocking or insufficient compaction. A mechanical testing procedure of the bulk straw material including closed die compaction testing as well as simple upsetting of pre-compacted billets of straw is carried out based on which a mathematical model for the yield surface is determined fitting to a geological cap model for porous material similar to the Drucker-Prager spherical cap model. An experimental test campaign is carried out to determine the feasible process window for pre-treatment of wheat straw by roll pressing varying the feed, the roll gap, the roll speed and the moisture content of the bulk straw.
Keywords:
pre-treatment of biomass, roll pressing of straw, process window
Topic:
Biomass Conversion Technologies for Heating, Cooling and Electricity
Subtopic:
Production and Supply of Solid Biofuels
Event:
25th European Biomass Conference and Exhibition
Session:
2CO.13.1
Pages:
492 - 499
ISBN:
978-88-89407-17-2
Paper DOI:
10.5071/25thEUBCE2017-2CO.13.1
Price:
FREE
