Pilot-scale study on the influence of wood dust type on pressure drop during filtration in a pulse-jet baghouse

Experimental filtration processes were carried out to investigate the air flow resistance during separation of three types of wood dusts in a pilot-scale pulse-jet filter. Three types of dust were compared: dust from sanding pine wood, dust from sanding beech wood and dust from working particl,eboard. These dusts are characterized by different particle-size distribution. The resistance coefficient K1 was determined for the filter fabric used in tests. Basing on the results of pressure drop across the filter measured during the experimental processes in condition of three levels of filtration velocity Vf (0.0405; 0.0484 and 0.0583 m s−1) the specific dust cake resistance coefficient K2 was calculated. It value depends on the dust type and filtration velocity used. The lowest K2 (20,085 s−1) has pine wood dust at filtration velocity 0.0484 m s−1. While the highest value (28,925 s−1) was calculated at Vf = 0.0583 m s−1 for dust from working of particleboards.