Experimental Study of Nonwoven Media effects on a Baghouse Filter

Dust particles contained in an industrial exhaust gas are emitted from many industrial plants. This leads to severe air pollution and poses risks to the human health. A dust collector was designed to efficiently capture particles smaller than 10 microns, which is crucial for mitigating air pollution. Filtration using nonwoven filter media is one of the promising technologies with significant potential for application in environmental protection efforts. In this research, a series of experiments was conducted to study the efficiency of nonwoven filters under different operating conditions. The tests were performed on the filter materials with various air permeability properties, using a pilot-scale dust collector for experimentation. Data was recorded consisting of filtration pressure drop and gas velocity. The results show that the pressure drop increased according to the increased of gas velocity but decreased with the increased of air permeability of the filter media. The pressure drop could be described with the second-order polynomial equation of the filtration velocity and related to the DarcyForchheimer equation for porous media. In comparison to our filter materials, there were two pressure drop increase patterns caused by air permeability property. The lower air permeability had a similar pressure drop. The pressure drop obtained from the experiment and model is in good agreement with the coefficient of determination (R2) higher than 0.989 and thus achieves an effective predictive model for air filtration system design.