THE INFLUENCE OF THE FABRIC PROPERTIES ON DYNAMIC FILTRATION PERFORMANCE OF PPS FILTER MATERIAL

Chosen PPS fabric material，microfiber layer filter material，microporous PTFE membrane filter material，triple leaf fiber layer filter material as filter material，the study measured the dynamic dust removal performance indexes in the VDI device for cold test adpoting the Al2O3 dust of Pural NF． The results showed that the types of fabric properties had a relatively large influence on the resistance of the filtration materials． Although the resistance of filter material in clean stage was close to 200 Pa， but the resistance in stable and aging stage was only 300 Pa，and the conventional filter material resistance at stable stage was the largest up to 790 Pa． The difference of the fabric property also had a comparatively large influence on the average dust cleaning cycle of the filtration materials． The average dust cleaning cycles of the microporous PTFE membrane filter material，microfiber layer filter material，triple leaf fiber layer filter material and the conventional PPS filter material were 380，241，223，177 s，the dust cleaning cycle in other stage was the same as in the initial stages． The microporous PTFE membrane filtration material had the longest cleaning cycle and the longest life cycle． The filtration efficiencies of the microporous PTFE membrane filter material， microfiber layer filter material，triple leaf fiber layer filter material and the conventional PPS filter material in the initial stage could reach above 99. 9%，and the penetration efficiencies were 0. 0261%，0. 004%，0. 0321% and 0. 0322% respectively． The filtration efficiencies except the conventional filter material could reach above 99. 99%，and the penetration efficiencies were 0. 0027%，0. 0003%，0. 0014% and 0. 4765% respectively in the stable stage．