ル-バ-型慣性集塵器における粒子の羽根間からの逸出現象

概要

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The present paper deals with the runaway of solid particles having large diameter beyond the separable limit through blades in a louver-type dust separator. The following results were obtained from particle collection experiments using a two-sided louver. (1) For larger particles, the particle collection efficiency decreases with increasing inlet air velocity, and more particles run away through the blades set on the blowdown approach. (2) A center plate inserted in the louver helps prevent large particles from running away through the blades.<BR>The following points are inferred from the particle trajectories obtained from a numerical simulation of large particles. (1) The particle motion vertical to inlet air is amplified by impinging on blades, with increasing inlet air velocity. Its motion promotes the runaway of particles through blades. (2) A center plate inserted in the louver suppresses the runaway of particles through blades due to the inelastic collision of particles against the plate.<BR>It was experimentally verified by measuring the collision frequency against the bottom wall of a one-sided louver that the particle motion vertical to inlet air increases with increasing inlet air veloity.