Study on Performance of Mesoscopic Impactor Filters for Aerosol Removal

Abstract

The mesoscopic impactor filter is designed to filtrate aerosols in the containment, which has not only high collection efficiency but also small flow resistance. In this paper, the influence of structural parameters and working parameters of the inertial impactor on collection performance is studied by the computational fluid dynamic (CFD) method. Under the small Reynolds number, the laminar model is used to simulate the continuous phase, and the discrete phase model (DPM) is used to track the trajectory of the particle. Based on the response surface methodology (RSM), the prediction model of collection efficiency and pressure drop is obtained, which will provide a reference for the design and manufacture of the filter in the future.

Experimental Studies of Dust Suction Irregularity from Multi-Cyclone Dust Collector of Two-Stage Air Filter

“…The characteristic of the filtration efficiency φc = f(QG) and the flow resistances Δpc = f(QG) of the pass-through cyclone filter of the Volvo truck with dust suction (m0 = 10%) and without any dust suction.The characteristics-related tests have been performed with the rate of ejective suction from the dust collector of the cyclone m0 = 10% and without any suction.With the increase in the rate of the air flow QG, the filtration efficiency increases, and after reaching the maximum value of φcmax = 81.8% for QG = 25 m 3 /h, it slightly decreases. Such a course of the cyclone characteristic φc = f(QG) is in conformity with the results of other studies presented in the literature[56][57][58][59][60][61]. An increase in the air flow QG causes, at the same time, a decrease in the maximum size of the dust grains dpmax (increase in the filtration accuracy of the cyclone), and upon determining the minimum value dpmax = 20 µm at QG = 20-25 m 3 /h, an increase in dpmax value takes place.…”

Computational Fluid Dynamics–Discrete Phase Method Simulations in Process Engineering: A Review of Recent Progress

“…Using the differences in physical and chemical properties of each component in the mixture, the process of distributing each component to different spatial regions is called separation. Typical applications include the cyclone separator [50][51][52][53], hydrocyclone [54,55], classifier [56][57][58], filter [59][60][61][62] and dust collector [63,64]. In the separation process, CFD-DPM is used to obtain the fluid and particle behavior in the internal space, so as to further study the separation performance [65][66][67].…”