Performance of surface finished polyester filter media exposed to different dust types with the variation of dust concentration

Abstract

Emissions of dust from industrial plants pose the greatest threat to environment and human health. Pulse-jet cleaning is the most efficient system to control industrial emissions. The present study consisted of four surface-treated filter media exposed to two dust types at three dust concentrations. The filtration performance in terms of filter efficiency is determined by the PM emissions, number concentration and gravimetric mass emissions of particles. Additionally, the filter performance is assessed by residual pressure drop and depth of dust penetration. The dust emissions, residual pressure drop, and depth of dust penetration are found to be lowest for needle-punched membrane (NPM) media. Apart from NPM, the needle-punched spun-laced water-repellent finished media showed better results than the other two surface filters used conventionally. For residual pressure drop, dust type contributes more at lower dust concentration levels. However, media (surface finish) surpasses the effect of dust type at higher dust concentration levels.