Title:
Alternative Solid Biofuels Production of High Quality Mixed Pellets from Hay and Digestate
Author(s):
Kirsten, C., Dempwolf, C., Lenz, V., Schröder, H.-W., Repke, J.-U.
Document(s):
Paper
Slide presentation
Abstract:
Within the present study, the production of mixed pellets made of hay and digestate with high physical-mechanical quality is presented. The dry raw materials were grinded with a hammer mill, mixed in different ratios and subsequently compacted in a commercially available ring die wood pelletizing plant on pilot scale. The main focus was set on the process parameters required for the pelletizing, like the press channel geometry or the gap between rollers and die. Furthermore, the water content of the raw material was altered. The produced pellets were evaluated according to their physical-mechanical properties and according to the energy demand of the pelletizing process. The use of press channels with back bore significantly improved the physical-mechanical properties of the pellets with an additional positive effect on the energy input. Also the gap between rollers and die had a strong influence on the pellet quality. The adapted settings provided pellets with a durability of up to 98 wt.-% and bulk density up to 600 kg/m3 which is in accordance with the requirements of EN 14961-6.
Keywords:
pellet, mixed biomass pellets, pelletization, digestate, hay
Topic:
R&D on Processes for Solid, Liquid and Gaseous Fuels from Biomass
Subtopic:
Production and supply of solid biofuels
Event:
21st European Biomass Conference and Exhibition
Session:
3DO.2.2
Pages:
1350 - 1354
ISBN:
978-88-89407-53-0
Paper DOI:
10.5071/21stEUBCE2013-3DO.2.2
Price:
FREE
