Investigation of the interaction of particulate matter and its separation from the gas flow in a multi‑channel cyclone with recirculation

Abstract

The deposition of ultrafine particulate matter (UFPM) in the gas flow in the channel occurs as they settle due to adhesion and under the influence of gravity.A treatment of the multi-channel cyclone is based on centrifugal filtration, with the two-phase gas flow in constant contact with the curved elements installed in the separation chamber.Prevailing gas flow trajectories were analyzed in a 3D printed multi-channel cyclone at 11–18.5 m3/h gas flow rate. The intensity of adhesion of UFPM (0.4–5 μm in size) to the surface at their low concentration (no more than 10 mg/m3) was visually evaluated under normal and up to 95% humidity conditions. The focus is on the adhesion of the UFPM to the surface of polylactic acid. By the discrete element method it was achieved the results of the coefficient of restitution to normal and tangential direction for 0.5 μm, 1.0 μm and 2.0 μm particles with the surface, as well as changes in force were equal to at normal up to 3 μN and tangential up to 1 μN over time in 20 ns.