CFD investigation of high-temperature gas filtration using twin ceramic candles

The present research investigates the removal of particulate matter smaller than 2.5 μm (PM2.5) from high-temperature exhaust gas using a twin ceramic candle filter. Computational fluid dynamics (CFD) is used to simulate gas flow behavior since the technique could provide crucial support to experimental investigation, especially for harmful conditions, as well as yield cost savings and fast results. In this research, the dynamic behavior of gas flow in a prototype twin-candles ceramic filter was studied. One interesting phenomenon not seen in single candle filtration systems is the unforeseen cleaning effect on an adjacent candle filter due to the pulsed cleaning of another. It is useful to investigate the face velocity distribution on the candle as it illustrates how the filter cake is formed on the filter surface and hence leads to improvement in the dust cleaning. The obtained simulation results were validated with available experimental data.

CFD is employed to simulate gas flow in a prototype twin-candle ceramic filter for PM2.5 removal under high temperature. One interesting phenomenon found here is unforeseen cleaning effect on an adjacent candle filter due to pulsed cleaning of another. Face velocity distribution on a filter illustrates how cake layer is formed and hence leads to improvement in its surface cleaning.Figure optionsDownload as PowerPoint slide