Filtration of unipolar submicron aerosols through fibrous filters in the presence of an external electric field

The filtration of unipolar submicron aerosol drops with a diameter of 0.1–4 μm through fibrous filters polarized in an external electric field of up to 10 kV/cm was studied. The experimental trapping coefficients of charged particles for a fan model filter with a homogeneous fibrous structure were significantly higher than the trapping coefficients of uncharged particles because of the diffusion deposition and linking. Highly effective systems of air purification from disperse and molecular impurities with low resistance and the consumption of up to 10⁵ m³/h were developed on the basis of electrofiltration and photocatalysis.