AAAR 31st Annual Conference
October 8-12, 2012
Hyatt Regency Minneapolis
Minneapolis, Minnesota, USA
Abstract View
Experimental Study of Agglomerate Particle Filtration Using Flat Filter Media
QISHENG OU, Da-Ren Chen, Washington University in St. Louis
Abstract Number: 385 Working Group: Control Technology
Abstract In various industrial production processes, particulate contaminants are an important issue that must be resolved. Among all the means of removing and/or separating particles from a gas stream, filtration is known as the most economical one for achieving high removal efficiency of fine aerosol particles. Because particle collection in filters is a very complex problem, in most of the studies of particle filtration, the particle shape is generally assumed to be spherical to avoid further complication. However, in reality, many particles are branch-like agglomerates composed of primary (nearly monodisperse) particles having diameters d_p=10-100 nm. These agglomerates may contain from a few up to thousands of such particles and span sizes from a few tens of nanometers up to several micrometers. Theoretical and experimental investigations on agglomerate particle filtration, especially the loading behavior, are scarce.
In this study, a series of experiments was performed to study the loading behavior of flat filters loaded with agglomerate particles. The testing particles were generated from a diffusion flame burner, in which both branch-like agglomerates with fractal dimension of ~1.8, and chain-like agglomerates with almost linear structure (fractal dimension approaching to 1.0) were synthesized using different precursors. The loading behaviors in both depth and transition filtration regime, as well as surface filtration regime were investigated for a variety of filter media. The detailed experimental result will be presented in the talk.