Experimental study on filtering mixed solid–liquid dust with a sliding granular bed filter

Abstract

The filtration of mixed dust that included a small number of melted (liquid) particles was studied in an experimental granular bed filter (GBF). Results show that the collection efficiency of dust containing melted particles is higher than that of dust composed of solid particles but the pressure drop from the former is higher than that of the latter. The collection efficiency and pressure drop increase as the concentration of melted particles increases. A surface sliding GBF exhibits good comprehensive performance when filtering dust, especially dust containing a mix of solid and liquid particles. The effects of the gas temperature, gas velocity, sliding filter bed thickness, and sliding collector flux on filter performance were also examined. Based on the experimental results, correlations for the collection efficiency and pressure drop for mixed dust are presented.