Filtration Characteristics of Fine Particulate Matters in a PTFE/Glass Composite Bag Filter

Received: March 22, 2012
Revised: June 14, 2012
Accepted: June 14, 2012
Download Citation: RIS|BibTeX|https://doi.org/10.4209/aaqr.2012.03.0071  

Cite this article:
Park, B.H., Kim, S.B., Jo, Y.M. and Lee, M.H. (2012). Filtration Characteristics of Fine Particulate Matters in a PTFE/Glass Composite Bag Filter. Aerosol Air Qual. Res. 12: 1030-1036. https://doi.org/10.4209/aaqr.2012.03.0071

ABSTRACT

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.

Keywords: Bag filter; Filter cleaning; Porous filter media; Bag house; Dust cake