Abstract
Fine particulate matter limits the widespread use of granular bed filter due to the difficulty of being trapped by a granular bed. In this paper, a coupled EDEM–Fluent simulation was used to describe the contact adhesion between fine particles and filter granules using the Johnson–Kendall–Roberts model. The effects of inlet gas temperature, inlet gas velocity, and filter layer arrangement on dust removal efficiency were investigated. Results show that the dust removal efficiency decreases continuously with increasing inlet temperature when thermophoresis is ignored, and dust removal efficiency decreases and then increases when thermophoresis is added, with the turning point at 973 K. The effect of inlet gas velocity on dust removal efficiency is relatively small. By optimizing the granular bed structure using a 4:1 granular size ratio arrangement, dust removal efficiency is increased by >20% compared with a 2:1 structure, whereas pressure drop only increases by 248.15 Pa.
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