Multi-scale analysis on the pulverized coal flow behaviors under high pressure dense-phase pneumatic conveying--颗粒学报PARTICUOLOGY

Gao, H., Wang, X., & Chang, Q. (2022). Multi-scale analysis on the pulverized coal flow behaviors under high pressure dense-phase pneumatic conveying. Particuology, 60, 107-114. https://doi.org/10.1016/j.partic.2021.05.002

Multi-scale analysis on the pulverized coal flow behaviors under high pressure dense-phase pneumatic conveying

Heming Gao ^*, Xiaojuan Wang, Qi Chang

School of Mechanical and Precision Instrument Engineering, Xi’an University of Technology, Xi’an 710048, China

10.1016/j.partic.2021.05.002

Volume 60, January 2022, Pages 107-114

Received 23 December 2019, Revised 9 May 2021, Accepted 14 May 2021, Available online 29 May 2021, Version of Record 23 October 2021.

E-mail: gaoheming@126.com

Highlights

• Multi-scale flow behaviors of dense gas-solid two-phase flow were studied.

• Stable and unstable flow state of pulverized coal were investigated.

• Effect of particle size on flow behaviors was investigated and evaluated.

Abstract

To deeply knowledge of the flow behaviors of pulverized coal particles in dense gas–solid two-phase flow, a multi-scale analysis method based on electrostatic sensor array is applied for the multi-scale characterization of flow behaviors of dense gas–solid flow. The experimental results indicate that: for steady flow, with the increment of conveying pressure difference, the individual particles increase and the particle clusters decrease, the individual particle distribution is always inhomogeneous but the particle cluster distribution tends to be more homogeneous over the cross-section of pipe, while the average flow behavior of pulverized coal particles is always in the relatively static state. For unsteady flow, the average flow behavior of pulverized coal particles is dynamic, and the flow behaviors of the multi-scale flow structures over the cross-section of pipe are all significantly inhomogeneous. Moreover, the effect of particle size on flow behavior of pulverized coal is also investigated and validated.

Graphical abstract

Keywords

Dense-phase pneumatic conveying; Pulverized coal; Multi-scale; Particle charging

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