Abstract
It is difficult to generate high concentration PSL (polystyrene latex) aerosol particles by existing regular nebulizers or atomizers because the probability that a droplet contains two or more PSL particles increases. To overcome this problem an alternative technique where a high pressure N2 gas operating (up to 12 MPa) ejector is used, has been attempted. High concentration PSL particle suspensions (10 wt%) are fed into the ejector throat and they are accelerated in the N2 gas stream having the critical (sonic) velocity to disintegrate the fragments of the suspension and at the same time to dry them up. The results showed that fairly monodisperse PSL aerosol particles with the concentration as high as 1012-1013 particles/m3 for 0.5-1.7 μm particles could be generated. It is expected that the present technique can be applied to performance tests of high efficiency air filters, to dry particle deposition processes in liquid crystal display production and so forth.
