Abstract
An experimental study on thermal processing of particulate solids has been carried out on a valved pulse combustion unit. The test-bench consists of a 60 kW natural gas-fired valved (flappers) pulse combustor having a 4.63 × 10−3 m3 combustion chamber, horizontal tailpipe with variable geometry, and a cylindrical drum. The particulate solid used is clean sand (311 µm and 2646 kg/m3), which flows within the tailpipe and the cylindrical drum located at its end. The sand flowrate was varied from 10 to 50 kg/h and it was heated from 20 to 600°C. Local pressure measurements showed clearly that the propagation of sonic waves remain stable when they are in direct contact with the sand particles. The heating time of sand particles in the pulsed system was found shorter than the one observed when operating with a conventional burner under the same conditions; this resulted in a 25.5% reduction of natural gas consumption. #The copyright is held by © Her Majesty the Queen in Right of Canada, represented by the Minister of Natural Resources, 2003.
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