Dynamic flowsheet simulation of re-entrainment from particle layers formed inside electrostatic precipitators

This study presents the implementation of a new time-resolving model for electrostatic precipitation utilizing a re-entrainment model. Experimental data support the results of modelling. The model uses a statistical approach based on properties of the particulate layer forming at the precipitator walls. The model is used for the analysis of the redispersion of particles in a laboratory-scale electrostatic precipitator (Sander, Gawor, & Fritsching, 2018). Results show reduced precipitation efficiencies for particles larger than 5 µm as particles have higher kinetic impact energies and lower bounding energy at the layer surface. Time dynamics reveal a steady-state behavior of the separation for CaCO3 (limestone, trademark “Ulmer Weiss®”) while Al2O3 (trademark “Pural NF®”) precipitation is affected by layer buildup at the walls increasing over several minutes.Graphical abstract
Source: Particuology - Category: Science Source Type: research