10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
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Evaluation of Particle Loading Performance of Two-stage Filtration System
XINJIAO TIAN, Qisheng Ou, David Y. H. Pui, University of Minnesota
Abstract Number: 1012 Working Group: Control and Mitigation
Abstract Intake air filters are widely used in many industrial sectors to migrate the particles emissions, however, its resistance often increases rapidly and dust holding capacity is low. Installing a pre-filter before the main stage intake air filter is an effective way to improve the filtration performance. Pre-filters are designed to capture large particles before they reach the downstream 2nd-stage filter, which reduce the dust load on the 2nd-stage filter. The pressure drop of the 2nd-stage filter, therefore, increase slowly with extend life-time. In this study, the loading characteristics of a two-stage filtration system, consisting of a 1st-stage pre-filter and a 2nd-stage main intake air filter, is experimentally evaluated. Three different pre-filter media are used on the 1st-stage, and three common intake air filters are used on the 2nd-stage. Bi-modal aerosols consisting of both super-micrometer coarse mode and sub-micrometer fine mode with varied mixing ratios are employed to challenge the two-stage filter system. The influence of pre-filter to the overall performance of the two-stage system will be investigated for different filter combinations, aerosol compositions, and filtration area ratio between the two stages.