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Title: Screw conveyor dryer: Process and equipment design
Authors: Waje, S.S.
Thorat, B.N.
Mujumdar, A.S. 
Keywords: Heat transfer
Residence time
Screw geometry
Specific consumption of mechanical energy
Thermal efficiency
Issue Date: Jan-2007
Citation: Waje, S.S., Thorat, B.N., Mujumdar, A.S. (2007-01). Screw conveyor dryer: Process and equipment design. Drying Technology 25 (1) : 241-247. ScholarBank@NUS Repository.
Abstract: The effects of various process variables and equipment components (geometry) on the performance of a screw conveyor dryer (SCD) were studied in terms of the material throughput and its uniformity, dryer load, specific consumption of mechanical energy, and heat transfer rate. The experimental results for drying of fine crystalline solids (50-100 μ particle size and 550 kg/m3 bulk density) in a 3-meter-long uninsulated jacketed screw conveyer dryer with a 0.072-m screw diameter have been used. The hydrodynamic performance of the SCD was also studied using sand particles of 350 μm size and 1500 kg/m3 bulk density (tapped). The maximum specific consumption of mechanical energy for conveying was found to be 1 kJ/kg. Moreover, the flow behavior of the material at the dryer discharge was found to depend strongly on the screw speed and the material feed rate.
Source Title: Drying Technology
ISSN: 07373937
DOI: 10.1080/07373930601161112
Appears in Collections:Staff Publications

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