Volume 12, No. 5, October 2012, Pages 1030-1036 PDF(1.57 MB)
Filtration Characteristics of Fine Particulate Matters in a PTFE/Glass Composite Bag Filter
Byung Hyun Park1, Sang Bum Kim1, Young Min Jo2, Myong-Hwa Lee3
1 Green Process and Material R&D Group, Korea Institute of Industrial Technology, 89 Yangdaekiro-gil, Ipjang-myeon, Cheonan-si, Chungnam 331-822, Korea
2 Department of Environmental Science & Engineering, KyungHee University, Yong-in, Gyunggido 449-701, Korea
3 Energy System R&D Group, Korea Institute of Industrial Technology, 89 Yangdaekiro-gil, Ipjang-myeon, Cheonan-si, Chungnam 331-822, Korea
Bag houses are often used to control particulate matters and recover valuable resources in various industries. A bag filter is the most important component in a bag house system, and thus it is important to develop the best-quality filter media and determine the optimum operating conditions of a bag house system. This study focused on particle penetrations under an operating condition of a bag house system, and investigated the relationship between dust clogging and dust penetration as a function of pressure drops across the filter medium. The results showed a minimum collection efficiency of 80% for 0.45 μm particles at the initial stage of filtration, although this quickly recovered and remained over 99.99% with a pressure drop greater than 20 mmH2O with a newly developed porous filter (air permeability = 5.78 × 10−11 m2). Furthermore, the recovery time depended strongly on particle size. While it was inversely proportional to the particle size at the initial stage of filtration, it showed no difference for particles larger than 0.725 μm due to its uniform dust cake as filter cleaning proceeded.
Bag filter; Filter cleaning; Porous filter media; Bag house; Dust cake.