LDV measurements of particle velocity distribution in an annular stripper

Yongzheng Li; Xiaolai Zhang; Guangwei Zhai; Haitao Zhang; Tao Li; Qiwen Sun; Weiyong Ying

doi:10.1016/j.cjche.2019.03.016

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LDV measurements of particle velocity distribution in an annular stripper

Fluid Dynamics and Transport Phenomena | Updated：2026-01-06

- LDV measurements of particle velocity distribution in an annular stripper
- Chinese Journal of Chemical Engineering Vol. 27, Issue 10, Pages: 2293-2303(2019)
- Affiliations：
  
  1. Engineering Research Center of Large Scale Reactor Engineering and Technology, Ministry of Education, State Key Laboratory of Chemical Engineering, East China University of Science and Technology,Shanghai,China,200237
  2. School of Chemistry and Chemical Engineering, Shandong University,Jinan,China,250100
  3. State Key Laboratory of Coal Liquefaction and Coal Chemical Technology,Shanghai,China,201203
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2019.03.016
  CLC：
- Published：2019
- Accepted：
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Yongzheng Li, Xiaolai Zhang, Guangwei Zhai, Haitao Zhang, Tao Li, Qiwen Sun, Weiyong Ying. LDV measurements of particle velocity distribution in an annular stripper[J]. Chinese Journal of Chemical Engineering, 2019, 27(10): 2293-2303.
DOI：

Yongzheng Li, Xiaolai Zhang, Guangwei Zhai, Haitao Zhang, Tao Li, Qiwen Sun, Weiyong Ying. LDV measurements of particle velocity distribution in an annular stripper[J]. Chinese Journal of Chemical Engineering, 2019, 27(10): 2293-2303. DOI： 10.1016/j.cjche.2019.03.016.

摘要

Abstract

Particle descent velocities in an annular stripper were measured by a laser Doppler velocimetry (LDV) system. In the radial direction

particle descent velocity was relatively constant in the mid-region of the stripper and increased towards the walls on both sides

exhibiting an anti-U-shaped distribution. Particle descent velocity in the radial mid-region increased with the increase of superficial gas velocity

and the maximum in the outer wall region increased significantly with the increase of solid mass flux. Superficial stripping gas velocity had stronger effect on particle velocity distributions near the stripper gas distributor

and such effect weakened with the increase of the distance from the distributor. Local particle velocity and its radial profiles could be adjusted by changing the superficial stripping gas velocity. Empirical formulas were established to describe the relationships between the local particle velocity and cross-sectional averaged velocity based on the effects of operating conditions and measuring positions. The result showed that the predicted data was in good agreement with the experimental value.

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