Title:
The Effect of Moisture on Specific Energy Requirement for Knife Milled Beech Chips
Author(s):
Krátký, L., Jirout, T., Dostal, M.
Document(s):
Paper
Poster
Abstract:
The paper evaluated moisture's effect on specific energy requirements for knife milling of beech chips. The wood chips with moistures of 0.5 wt %, 7.5 wt % and 15.9 wt % were reduced in size under various rotor´s pe-ripheral speeds and opening sizes being at drum sieves of the knife mill with biomass flowrates 25.18 - 122.71 kg h-1 m-1 of the total length of installed blades in pair. The specific energy requirement of 2.4 - 55.5 kWh t-1 was identified to reach the final particle size D50 of 0.3 - 0.8 mm from the initial one of 1.4. The biomass particle size evinced brittle behaviour. The Rittinger law was found to precisely fit the experimentally identified values of specific energy require-ment in dependence on particle sie characteristics and biomass moisture. The Rittinger constant was equal to 26.07 - 59.18 kWh mm t-1 for moisture ranges 0.5 - 15.9 wt % evincing its direct proportion to biomass moisture.
Keywords:
moisture, beech chips, energy requirement, knife mill, Rittinger theory
Topic:
Biomass Conversion for Bioenergy
Subtopic:
Production and Supply of Solid Fuels and Intermediates
Event:
29th European Biomass Conference and Exhibition
Session:
2DV.2.14
Pages:
676 - 681
ISBN:
978-88-89407-21-9
Paper DOI:
10.5071/29thEUBCE2021-2DV.2.14
Price:
FREE
