Dust distribution of solid and adhesive mixed dust in a granular bed filter--颗粒学报PARTICUOLOGY

Wang, Z., Liu, C., Wang, L., Yin, S., & Tong, L. (2022). Dust distribution of solid and adhesive mixed dust in a granular bed filter. Particuology, 67, 1-7. https://doi.org/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}

a School of Energy and Environment Engineering, University of Science and Technology, Beijing, China
b Beijing Engineering Research Centre of Energy Saving and Environmental Protection, China

10.1016/j.partic.2021.09.008

Volume 67, August 2022, Pages 1-7

Received 5 July 2021, Revised 16 September 2021, Accepted 16 September 2021, Available online 1 October 2021, Version of Record 26 November 2021.

E-mail: cpliu@ustb.edu.cn

Highlights

• Removal of dust containing both adhesive and solid dust was studied.

• Mass of mixed dust decreases exponentially from the upper to the bottom layer.

• Deviation between adhesive and solid dust varies linearly along with bed depth.

• Correlation of dust distribution of collected mixed dust was presented.

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

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