Abstract
Ceramic filters are often utilized to collect dust particles under the very high temperature and high pressure conditions in flue gases for gas turbines or fuel cells in combined cycle power generation systems, and for their long-term use the dust cakes attached on the filter surface should be removed at adequate intervals. At present, the pulse jet-type dust cleaning method is considered to be the most useful. In this study, a numerical simulation is applied to a flow passing through a ceramic candle filter on the pulse jet cleaning, and the validity of it and the detailed flow behaviors are investigated by comparison with experiment. The results show that the present computation is valid in predicting the flow characteristics in the ceramic candle filters for arbitrary pulse jet and dust cake packing density conditions. Also, the dust-removal behaviors observed in the experiment can be well explained by using the time variation of pressure (static pressure) between the filter and dust cake.
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