<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The stable transportation of pulverized coal in the vertical pipe is significant for the operation of the gasifier. There are few studies on the flow characteristics and flow pattern transition of particles in vertical pipes with small diameters. This paper has modeled and analyzed the flow characteristic of powder in dense-phase pneumatic conveying through 25 mm vertical pipe using CFD. Firstly, the grid independence is verified to determine the optimal mesh size. Then, the influences of different solid loading ratios (SLRs) and conveying velocities on particle flow characteristics, flow stability, and flow pattern transition are investigated. The results show that the flow pattern in the vertical pipe changes from annular flow to uniform flow at high SLR and low conveying velocity. Moreover, the evolution regulation of resistance characteristics under different conveying velocities is further revealed. Considering the conveying stability and economic benefit, the most suitable conveying velocity is 6 m/s.</p>
</abstract>

The stable transportation of pulverized coal in the vertical pipe is significant for the operation of the gasifier. There are few studies on the flow characteristics and flow pattern transition of particles in vertical pipes with small diameters. This paper has modeled and analyzed the flow characteristic of powder in dense-phase pneumatic conveying through 25 mm vertical pipe using CFD. Firstly, the grid independence is verified to determine the optimal mesh size. Then, the influences of different solid loading ratios (SLRs) and conveying velocities on particle flow characteristics, flow stability, and flow pattern transition are investigated. The results show that the flow pattern in the vertical pipe changes from annular flow to uniform flow at high SLR and low conveying velocity. Moreover, the evolution regulation of resistance characteristics under different conveying velocities is further revealed. Considering the conveying stability and economic benefit, the most suitable conveying velocity is 6 m/s.

Numerical simulation of dense-phase pneumatic conveying in vertical pipe for gasifier

Polish Journal of Chemical Technology

This work is licensed under the Creative Commons Attribution 4.0 International License.

The stable transportation of pulverized coal in the vertical pipe is significant for the operation of the gasifier. There are few studies on the flow...

Numerical simulation of dense-phase pneumatic conveying in vertical pipe for gasifier

Publié en ligne: 12 oct. 2023

Pages: 14 - 22

DOI: https://doi.org/10.2478/pjct-2023-0020

Mots clés
Pneumatic conveying, Flow characteristics, Dense phase, High pressure, Process innovation

© 2023 Yuzhen Gao et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Numerical simulation of dense-phase pneumatic conveying in vertical pipe for gasifier

Publié en ligne: 12 oct. 2023

Pages: 14 - 22

DOI: https://doi.org/10.2478/pjct-2023-0020

Mots clésPneumatic conveying, Flow characteristics, Dense phase, High pressure, Process innovation

© 2023 Yuzhen Gao et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Mots clés
Pneumatic conveying, Flow characteristics, Dense phase, High pressure, Process innovation