The characteristics of a formulated filter aids for fabric filters

Abstract

The characteristics of a formulated filter aids material known as PrekotAC were investigated in this study. PrekotAC does not merely act as a flue gas cleaning agent but also as an efficient dust separation material to be used in a fabric filter system. PrekotAC was formulated based on the combination of PreKot™ and activated carbon with four different weight ratios of 10:90, 20:80, 30:70 and 40:60, respectively. The relationship between pressure drop and the characteristics of the newly formulated filter aids in terms of filtration velocity, permeability and material loading across a filter media was investigated. The results showed that pressure drop across a filter media decreases as the amount of PreKot™ content in the mixture increases. It was observed that the formulation of PrekotAC 40:60 gave the lowest pressure drop compared to the other combinations. The characteristics of the PreKot™ itself, which are fluffy and multi-cellular in nature help to form a porous filter cake layer during the filtration process. Furthermore, the particle size distribution of the formulated PrekotAC which is well balance leads to the formation of a porous cake with high permeability even under high filtration velocity or material loading conditions.