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Filter cartridges are widely applied in the industrial dust removal system, and pleat structure plays a major role in expanding the filter area in limited space. In this study, the effect of pleat ratio (the ratio of pleat height to pleat pitch) on the effective filtration area (EFA) during polydisperse dust loading was analyzed. The results indicate that the dead zone formed by pleating will increase the structural resistance and reduce the EFA. When pleat ratio is 0.74–1.48, the EFA percentage varies slightly with the dust deposition per unit area (DDPUA). When pleat ratio is 2.22–3.70, the EFA percentage decreases with the increase in DDPUA. The threshold friction velocity surges with the decrease of dust particle size, and the larger the pleat ratio, the more easily for larger dust particles to deposit at the pleat corners, leading to the reduction of the EFA percentage decreasing rate. |
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