Permeability of wood pellets in the presence of fines.
Broken pellets and fines are produced when pellets are handled. The resistance to air flow was measured for clean pellets and for pellets mixed with 1-20% broken pellets (fines). A pellet diameter was 6mm. The lengths ranged from 6 to 12 mm. Clean pellets were defined as particles that remained on a 4mm screen. A typical sieve analysis showed 30% of the mass of particles that passed through the 4mm screen was smaller than 1mm. The airflow rates used in the experiment ranged from 0.004 to 0.357 ms(-1). The corresponding pressure drop ranged from 1.9 to 271 Pam(-1) for clean pellets, from 4.8 to 1100 Pam(-1) for 10% fines content, and from 7.9 to 1800 Pam(-1) for 20% fines content. Coefficients of Hukill and Ives' equation were estimated for clean pellets and a multiplier was defined to calculate pressure drop for pellets mixed with fines.
Yazdanpanah
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F
Chemical and Biological Engineering Department, University of British Columbia, 2360 East Mall, Vancouver, BC, Canada V6T 1Z3.
Sokhansanj
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Lau
A K
AK
Lim
C J
CJ
Bi
X
X
Melin
S
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Afzal
M
M
D000388:Air; D001709:Biotechnology / Q000379:methods*; D004391:Dust; D004867:Equipment Design; D010316:Particle Size; D010539:Permeability; D011312:Pressure; D015203:Reproducibility of Results; D013696:Temperature; D013997:Time Factors; D014934:Wood
D004391:Dust