Estimation of Filtering Velocity and Pressure Drop Parameters from Total Pressure Drop in a Multi-Compartment Bag Filter

Abstract

The parameters that expressed quantitatively the filtering velocity difference between compartments in a multi-compartment bag filter, i.e., the ratio of the filtering velocity in the compartment just before cleaning uN to the average one of all compartments u_av, m, and the variance of the filtering velocities ū_i, σ ²/u_av², were correlated well with the operating conditions of filtration. By connecting the correlations of initial total pressure drop Δ P_IN and final total pressure drop Δ P_FIN derived in the previous paper (Ikeno et al., 2002) with the correlations of m and σ² derived in the present paper, the pressure drop parameters ζ _d and a and the average filtering velocity uav were estimated. In the estimation procedure, the simulated values of the initial total pressure drop Δ P_IN,sim and final total pressure drop Δ P_FIN,sim were used.The estimated values of ζ _d and α coincided well with the original values used in the numerical simulation under when the filtering velocity in each compartment did not deviate greatly from the average filtering velocity, whereas the estimated value of uav coincided well with the original value of the numerical simulation under all filtering conditions.