Study on the effect of multi-stage filtration strategy on the wet filtration dust collector performance

Wet Filter Dust Collectors (WFDC) are commonly used in the mining industry for dust control. However, when filtering high concentration dust-laden air streams, the filter of WFDC is easily clogged. To solve the problem, this paper proposes a multi-stage filtration strategy based on Metal-based filter screens (MBFS) and conducts experimental. The results indicate that when the inlet dust concentration was 400 mg/m³, using a dual-layer MBFS with filtration precisions of 40 and 60 mesh and an installation distance of 0 mm, the WFDC achieves the minimum pressure drop of 450.09 Pa and dust emission concentration of 2.89 mg/m³. Additionally, when the inlet dust concentration increases, the WFDC can operate stably for a long time, and no clogging was observed for the filter. The multi-stage filtration strategy effectively solves the filter clogging problem. The results provide theoretical guidance for the design and application of WFDCs. • A multi-stage filtration strategy was proposed for solving the filter clogging problem of conventional wet filtration dust collectors. • The optimal operating parameters were obtained from the experimental data. • The optimized wet filter dust collector has a total dust reduction efficiency of 99.28%.