Resuspension of aerosol particles in fibrous filters-experimental studies

摘要

Theoretical analysis show significant effect of resuspension (Przekop et.al,2003,Przekop et.al,2004) and filter structure (Podgorski and Moskal,2001,Przekop and Podgorski,2002) on non-steady state filtration process.The results need experimental verification.The experiment consists of three parts.First part was production of filters of assumed properties and stucture using meltblown technology,loading of filters by flow of aerosol stream with velocity 0.2 [m/s].Through loaded filters the stream of pure air with velocity over 1 [m/s] was passed.Every 5 minutes the flow was breaked for microscopic observation of dendrites structure,shape and distribution in filter.To observe the deposits without destroying the filter,thin beds of four layers were assembled for thicker sets.