Effects of filter cartridge wetted before filtration and during filtration on the performance of cartridge dust collector

A growing number of cartridge dust collectors are used in the underground mining, but the underground wetting state have a grave impact on their performance. In order to study the influence of filter cartridge (FC) wetted before filtration and during filtration on the dust collector, a test system was built. The results showed that the pressure drop (PD) of wetted mechanical filter cartridge (MFC) returned to initial PD after 24 h, and coated filter cartridge (CFC) only need 12 h. The PD of pre-wetted FC rose rapidly while filtrated dusty air. The residual pressure drop (RPD) of pre-wetted FC was high, which heavily reduced the service life of FC. If FC was wetting during filtration of dusty airflow, the PD were minimum when the spray rate was 450 mL/ h, and the PD of MFC was higher than that of CFC.