Adhesion and desorption characteristics of high-temperature condensed flue gas dust on filter material surface

This study is based on high-temperature flue gas containing condensed dust and the dust removal of granular bed. The effects of adhesion temperature, filter plate material (99% and 85% corundum), and dust materials (tin, ferric oxide, and fly ash mixed with sodium chloride) on the desorption stress of dust on the filter surface are explored through desorption stress tests. Results show that the desorption force of tin peaks at 800 degrees C Adhesion at <900 degrees C is not observed for ferric oxide but occurs at >900 degrees C for fly ash blended with sodium chloride. The mixture adheres on the filter surface at >800 degrees C, and desorption force increases as adhesion temperature and sodium chloride proportion increase. Large desorption stress occurs on the extremely rough surface of the filter material. (C) 2019 Elsevier B.V. All rights reserved.