Effect of high temperature on the performance of filter fabric

High-temperature filtration is one of the most promising developments in particle collection technology. Process gases if cleaned (filtered) at elevated temperatures, then processes can be made more efficient in terms of energy and more integrated in terms of process technology. The present study embodies the effect of high temperature and dust concentration on the performance of different filter media (P84 with PTFE scrim and P84 with P84 scrim) in terms of emissions, filtration efficiency, pressure drop and other related factors. At low temperature and higher feed dust concentration level of 90 g/m3, P84/PTFE shows lower emissions in comparison to P84/P84, but at higher temperature the emissions were similar with different dust concentration levels for both the fabrics. However, at lower feed dust concentration (5 g/m3), the emissions from both fabrics are similar in the experimental region of gas temperature. Filtration efficiency was found to increase at elevated temperatures but at the cost of increased residual pressure drop. In order to predict the performance of filter fabric at high temperature by testing at lower temperature, empirical equations were developed taking into account the operating temperature and dust concentration.