Reverse-Flow Centrifugal Separators in Parallel: Performance and Flow Pattern

摘要

The results obtained by performance tests and flow visualization in a model swirl deck,containing 8 reverse-flow swirl tubes working in parallel being charged from and dis- charging to common plenums.Various features specific to such arrangements,such as the phenomenon of cross-talk,where flow from one tube to the other takes place in the dust collection plenum,are discussed in light of the results.The performance of the deck is compared to that of a single geometrically similar tube by Stoke sian scaling.This compar- ison shows that the performance of this deck is not seriously reduced by effects such as cross-talk.The appearance of dancing rings in the tubes reveal the presence of the end of the vortex in the tubes,a fact that impacts the phenomenon of cross-talk.The end of the vortex was further studied using high-time-resolution pressure sensors.The flowpattern in the dust plenum was studied using neutral density tracers with normal and high-speed photography.The impact of various modifications to the deck,such as artificially rough- ening a tube,reducing the volume of the dust plenum to exacerbate cross-talk,and length- ening the individual tubes to improve separation performance are discussed.