Partic. vol. 67 pp. 1-7 (August 2022)
doi: 10.1016/j.partic.2021.09.008

Dust distribution of solid and adhesive mixed dust in a granular bed filter

Zhengtao Wang^a, Chuanping Liu^a,*, Li Wang^a,b, Shaowu Yin^a, Lige Tong^a,b

cpliu@ustb.edu.cn

Abstract

Granular bed filters can effectively filter adhesive dust in high-temperature flue gas. In this study, polyvinyl chloride (PVC) powder was used as adhesive dust, and the mixture of PVC and ash powder was used to simulate solid and adhesive mixed dust. The effects of gas temperature, velocity, and inlet adhesive dust mass content on dust distribution in granular bed (GBF) were discussed. Results show that the mixed dust mainly accumulates on the upper part of the granular bed, and the mass of the collected dust decreases exponentially from the upper layer to the bottom layer in the GBF. The adhesive dust content collected in each layer differs from that of the incoming dust, and their deviation varies approximately linearly along with the depth of the bed. The total dust distribution and adhesive dust content deviation are influenced by gas temperature and inlet adhesive dust content but independent of gas velocity. The correlations of dust distribution of solid and adhesive mixed dust are presented based on the experimental results.

Graphical abstract

Keywords

Adhesive dust; Dust distribution; Hot gas; Granular bed filter