(265a) The Importance of Clearance and Bulk Solids Flow Properties in Predicting the Thoughput of a Screw Feeder
AIChE Spring Meeting and Global Congress on Process Safety
2006
2006 Spring Meeting & 2nd Global Congress on Process Safety
Fifth World Congress on Particle Technology
Selected Topics in Particulate Handling, Processing and Granular Systems
Thursday, April 27, 2006 - 1:00pm to 1:20pm
Predicting the throughput of a screw feeder can be influenced by several factors in addition to the screw geometry and rotational speed.
For feeders comprising a single screw throughput can be influenced by: the volumetric efficiency of the screw; the bulk solid's bulk density and its variability; whether the bulk solid is free-flowing or cohesive; the clearance between the screw and the casing.
Predicting the throughput of a multi-screw feeder has additional complicating factors including: whether the screw are overlapping or not; the distance between non overlapping screws; screw rotational directions; trough (casing) geometries.
This paper will consider these issues in relation to predicting the throughput of single and multiple screw feeders.
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