Filtering characteristics of porous SiC filter with high surface area

摘要

Filtering characteristics of porous silicon carbide candle filters consisting of a highly porous support and a filtration layer were fabricated by extrusion forming.Tube typed ceramic candle filers wre also fabricated for comparison.The cogwheel type filter showed much less pressuredrops than the tube typed one according to an increase of flow rate or continuous massloading.While the cogwheel shapedid not greatly affect the separation efficiency,it clearly affected the cleaning efficiency.Additionally,the cogwheel type filter showed better cleaning characteristics.It is suggested that the cogwheel shape is beneficial to decrease pressure drop and thus improves the operating performance.