1. School of Energy and Environment, Anhui University of Technology, Anhui Ma'anshan, China 243000; 2. School of Energy and Environment, University of Science and Technology Beijing, China 100083, China
Abstract：Towards both the problem of poor ash cleaning effect of coated membrane filter material commonly used in metal mine dust treatment and the basic requirements of ultra-low emission of ultra-fine dust, PTFE filter media immersion melt modification method was developed to prepare the melt-jet-punched fiber microporous membranes with a wide range of adaptability and low resistance and efficiency. PTFE melt-punched fiber microporous membrane production process was combined with the FE-SEM fiber structure recombination CFD-DEM coupling numerical simulation technology method, via which the filtration characteristics and dust removal surface characteristics of the microporous membrane filter material were analyzed. The results show that the fiber microporous membrane filter material made by pressure impregnation dyeing and heating baking treatment could provide the fine sericillary structure on the PTFE spray wire skeleton, which increased both the filling rate of the filter material (SVF) and the filtration efficiency of ultra-fine dust, especially for the third group of filter materials, the dust removal efficiency of fine particulate matter below PM10 was increased from 95.5% to 99.3%. We further verified the physical properties of the filter media by numerical simulation, and analyzed the microscopic dust removal performance and dust adhesion state distribution of the new filter media by combining FE-SEM microscopic dust adhesion state distribution.
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