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ISSN Online: 2377-424X
ISBN Print: 0-89116-909-1
International Heat Transfer Conference 9
POLLUTION CONTROL BY GRANULAR FILTERS -AN AEROSOL SCIENCE PERSPECTIVE
Résumé
Successful development of modern coal-fired power plants depends to a great measure on the ability to remove fly ash and other particulates from the flue gases. The high temperatures of the combustion gases in modern thermodynamic cycles dictate the use of granular filtration systems that can operate successfully at these high temperatures.
The paper introduces and critically reviews modern granular-bed filtration theories based on aerosol mechanics models. Deposition of aerosol particles onto the granular bed is reviewed for various deposition mechanisms, i.e., inertia, interception, gravity, Brownian diffusion and electrical effects. Theoretical and experimental results are expressed in terms of filtration efficiency as a function of aerosol and filter parameters.
The paper also reviews models which account for the dynamic behavior of the filter during its loading with particulates and compares the results with experimental data from the literature.
The paper introduces and critically reviews modern granular-bed filtration theories based on aerosol mechanics models. Deposition of aerosol particles onto the granular bed is reviewed for various deposition mechanisms, i.e., inertia, interception, gravity, Brownian diffusion and electrical effects. Theoretical and experimental results are expressed in terms of filtration efficiency as a function of aerosol and filter parameters.
The paper also reviews models which account for the dynamic behavior of the filter during its loading with particulates and compares the results with experimental data from the literature.