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Experimental Investigation of Hydrodynamic Characteristic of a New Rotating Stream Tray

  • Yuanhui Gong
  • Yan Wang
  • Huaigong Zhu
  • Wangfeng CaiEmail author
Research Article
  • 23 Downloads

Abstract

The hydrodynamic characteristic of a new rotating stream tray (NRST) was investigated. The tests were carried out using an air–water/oxygen experimental system in a column with a diameter of 500 mm. The hydrodynamic parameters studied were dry plate pressure drop, wet plate pressure drop, weeping, entrainment, and Murphree liquid efficiency. The results showed that the NRST has excellent performance in terms of high operational flexibility. The pressure drop, weeping rate, and entrainment rate remained low even under a high-capacity operation. Correlations of pressure drop, weeping, and entrainment for the NRST were obtained by regression analysis. The results can provide some important theoretical guidance for the development of this type of trays.

Keywords

Rotating stream tray Centrifugal separation Hydrodynamics Murphree liquid efficiency 

List of Symbols

e

Entrainment (kg)

ev

Entrainment rate

Eml

Murphree liquid efficiency

Fs

F-factor (based on superficial gas velocity) (m/s (kg/m3)0.5)

g

Acceleration of gravity (m/s2)

G

Gas mass flow rate (kg/s)

ML

Weeping (kg)

Q

Liquid flow rate across tray section (m3/(h m2))

Qv

Liquid volume flow rate (m3/h)

SD

Standard deviations of correlations

te

Time of collecting the entrainment liquid (s)

tw

Time of collecting the weeping liquid (s)

uh

Gas velocity through the plate holes (m/s)

us

Gas superficial velocity (m/s)

xi

Mass fraction of oxygen in the liquid phase at the inlet (mg/L)

xo

Mass fraction of oxygen in the liquid phase at the outlet (mg/L)

x*

Equilibrium mass fraction of oxygen in the liquid phase at the test temperature (mg/L)

\(\Delta P\)

Pressure drop (Pa)

\(\Delta P_{\text{d}}\)

Dry plate pressure drop (Pa)

\(\Delta P_{\text{w}}\)

Wet plate pressure drop (Pa)

Greek Symbols

\(\xi\)

Dry plate pressure drop coefficient

\(\rho_{\text{G}}\)

Gas density (kg/m3)

\(\rho_{\text{L}}\)

Liquid density (kg/m3)

Φ

Diameter (mm)

\(\omega\)

Weeping rate

Notes

Acknowledgements

This study was supported by the Shenzhen Science and Technology Research and Development Fund (JCYJ20160331113033413 and JCYJ20150630114140637).

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Copyright information

© Tianjin University and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Yuanhui Gong
    • 1
  • Yan Wang
    • 1
  • Huaigong Zhu
    • 2
  • Wangfeng Cai
    • 1
    Email author
  1. 1.School of Chemical Engineering and TechnologyTianjin UniversityTianjinChina
  2. 2.Peiyang Chemical Equipment Co., Ltd.TianjinChina

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