Characterization of Surface Finishing Effect on Filtration Performance of a Regenerable Filter Media by a Simplified Model

摘要

The periodical filter cleaning process has a marked effect on the filtration performances of fabric filters. A model was proposed to express the non-uniformity of residual dust cake distribution after filter cleaning in a simpler manner, in which two parameters, i.e. the surface cleaning fraction, , and the residual dust load on un-cleaned surface, , were introduced. Three filter media with different surface finishing were tested using VDI type-1 test rig and and were calculated by using the testing results. It can then be concluded that filter with surface finishing of calendar + singe has a better filter regeneration effect than that of singe + calendar. Lamination with PTFE membrane results in an excellent filter regeneration effect.