Mean residence time characterization in corotating twin screw extruder: Screw configuration comparison
Vol. 27 #1, March 2000
Paul Elkouss, University of Maryland
David Bigio, University of Maryland
Gregory Walsh, University of Maryland
Paul Andersen, Krupp Werner and Pfleiderer
Abstract
Many industrial processes are described by residence time distribution functions (RTD). Experiments were carried out on a 30mm Krupp Werner and Pfleiderer co-rotating twin-screw extruder (CoTSE) equipped with reflectance optical probes to study the residence functions of different screw geometries to distinguish them. Theory described by Gao, Bigio, et al, shows that the mean number of screw rotations can be found from these RTD functions from the product of the screw speed and mean resi dence time. This equipment was used to show that the mean number of screw rota tions is proportional to the inverse of the specific throughput. In addition, different geometries exhibit different functional relationships between the mean number of screw rotations and the inverse of the specific throughput.
See also:
- Solvents and thermoplastics separated in CRT extruders
Return to
Consultants' Corner