Size reduction and densification of herbaceous biomass
2005
Kronbergs, E.(Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Engineering. Inst. of Mechanics)E-mail:[email protected] | Smits, M.(Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Engineering. Inst. of Mechanics)
Herbaceous biomass can be obtained using delayed harvesting method with moisture content less than 15% and directly densified without drying. Size reduction experiments of common reed stalks as cutting; flattening and densification have been carried out. As the result of reed stalk flattening, more than 8 strips can be obtained from this tabular structure. Average energy consumption 273-380 J kgE-1 had been studied for reed stalk flattening. Specific cutting energy Escq value varies in 8-16 kJ square mE-2 in dependence of punch orientation angle according cross-section of reed specimen. Specific cutting energy for flattened stalk materials for reed density 600 kg mE-3, varies Esc=13.3 -27 J m kgE-1. Densification experiments of compositions from peat particles, coarse wheat stalk and reed material particles from (1-2 mm) group with pressure 230 MPa indicated influence of peat proportion. Density 1.0 g cmE-3 has been obtained in densification of straw stalk material particle compositions with peat, if peat proportion exceeds 20%.
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