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Experimental Investigation on Drawdown of Floating Particles in Viscous Systems Driven by Coaxial Mixers

Liu, Baoqing LU ; Gao, Pengfei ; Xu, Zilong ; Sunden, Bengt LU and Zheng, Yijun (2019) In Industrial and Engineering Chemistry Research 58. p.11060-11071
Abstract

In view of the current situation of single form and low efficiency, a coaxial mixer with wide adaptability was combined with the drawdown of floating particles in viscous systems, and the effects of operation mode, impeller type, impeller diameter, impeller submergence, system viscosity, solid concentration and particle size were investigated experimentally. It is found that the coaxial mixer under corotation mode can achieve the critical drawdown of floating particles with lower speed and power than the corresponding single-shaft mixer, and the advantage becomes more obvious with increasing system viscosity and solid volume fraction. Under the same conditions, compared with the axial and radial flow impellers, the mixed flow impeller... (More)

In view of the current situation of single form and low efficiency, a coaxial mixer with wide adaptability was combined with the drawdown of floating particles in viscous systems, and the effects of operation mode, impeller type, impeller diameter, impeller submergence, system viscosity, solid concentration and particle size were investigated experimentally. It is found that the coaxial mixer under corotation mode can achieve the critical drawdown of floating particles with lower speed and power than the corresponding single-shaft mixer, and the advantage becomes more obvious with increasing system viscosity and solid volume fraction. Under the same conditions, compared with the axial and radial flow impellers, the mixed flow impeller with down-pumping mode can effectively draw the floating particles down with the lowest critical speed and power. Moreover, a larger impeller diameter and smaller impeller submergence are recommended for the drawdown of floating particles, but the impeller diameter should not exceed half of the vessel diameter.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Industrial and Engineering Chemistry Research
volume
58
pages
11060 - 11071
publisher
The American Chemical Society (ACS)
external identifiers
  • scopus:85068167415
ISSN
0888-5885
DOI
10.1021/acs.iecr.9b01867
language
English
LU publication?
yes
id
df4d491d-4669-4bca-8b7a-c4273dafdbcf
date added to LUP
2019-07-10 17:00:36
date last changed
2022-04-02 20:26:21
@article{df4d491d-4669-4bca-8b7a-c4273dafdbcf,
  abstract     = {{<p>In view of the current situation of single form and low efficiency, a coaxial mixer with wide adaptability was combined with the drawdown of floating particles in viscous systems, and the effects of operation mode, impeller type, impeller diameter, impeller submergence, system viscosity, solid concentration and particle size were investigated experimentally. It is found that the coaxial mixer under corotation mode can achieve the critical drawdown of floating particles with lower speed and power than the corresponding single-shaft mixer, and the advantage becomes more obvious with increasing system viscosity and solid volume fraction. Under the same conditions, compared with the axial and radial flow impellers, the mixed flow impeller with down-pumping mode can effectively draw the floating particles down with the lowest critical speed and power. Moreover, a larger impeller diameter and smaller impeller submergence are recommended for the drawdown of floating particles, but the impeller diameter should not exceed half of the vessel diameter.</p>}},
  author       = {{Liu, Baoqing and Gao, Pengfei and Xu, Zilong and Sunden, Bengt and Zheng, Yijun}},
  issn         = {{0888-5885}},
  language     = {{eng}},
  pages        = {{11060--11071}},
  publisher    = {{The American Chemical Society (ACS)}},
  series       = {{Industrial and Engineering Chemistry Research}},
  title        = {{Experimental Investigation on Drawdown of Floating Particles in Viscous Systems Driven by Coaxial Mixers}},
  url          = {{http://dx.doi.org/10.1021/acs.iecr.9b01867}},
  doi          = {{10.1021/acs.iecr.9b01867}},
  volume       = {{58}},
  year         = {{2019}},
}