Research On The Filtration Characteristic Of Fibrous Material

With the development of modern air cleaning technique, air filtration industryface opportunity and challenge which never had before. The research on filtrationprinciple started since the World War I. Until now, although people have somecommon viewpoint in filtration principle of fibre material, there are still manyproblems during the application. Based on the success obtained by former people, thisresearch focus on growing on the understanding of filtration principle, investigatingsome factors that influence filtration performance through systemic experiment, forexample, velocity, fibre diameter, fill rate, thickness. The ultimate object of thisproject is to find the better way for the application of filtration theory.Firstly, some calculation has been made according to acdemic formula andexperiential formula about filtration principles. Secondly, Using filter auto test systemto experiment several kind of filter material with Nacl and DOP. And then, in order toinvestigate the pattern of filtration to variable diameter particles, we use atmospheredust as aerosol to test the filtration efficiency in multi-dispersion phase. After then, forthe reason to find the influence of filter material structure to filtration characteristic,we use electronic scan microscope to study the structure of filter material. Finally,based on the fibre material structure parameters and experiment condition, wecalculated on theory, compared the result with experimental data and find whether ithas some connection or not and how can we use the theory to instruct the practice.Through theoretical analyse and experiment, we conclude some relation betweenthe parameters that influence filtration characteristic on some conditions. Comparedexperimental data with calculate result and analyse the connection between differentexperimental methods, we find some measure to forecast filtration characteristic andinstruct practice using fibre structure parameters on special conditions.