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Experimental Investigation of Hydrodynamic Characteristic of a New Rotating Stream Tray

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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.

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Abbreviations

e :

Entrainment (kg)

e v :

Entrainment rate

E ml :

Murphree liquid efficiency

F s :

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)

M L :

Weeping (kg)

Q :

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

Q v :

Liquid volume flow rate (m3/h)

SD:

Standard deviations of correlations

t e :

Time of collecting the entrainment liquid (s)

t w :

Time of collecting the weeping liquid (s)

u h :

Gas velocity through the plate holes (m/s)

u s :

Gas superficial velocity (m/s)

x i :

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

x o :

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)

\(\xi\) :

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

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Acknowledgements

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

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Authors and Affiliations

  1. School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China

    Yuanhui Gong, Yan Wang & Wangfeng Cai

  2. Peiyang Chemical Equipment Co., Ltd., Tianjin, 300072, China

    Huaigong Zhu

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  1. Yuanhui Gong
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  2. Yan Wang
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  3. Huaigong Zhu
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  4. Wangfeng Cai
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Correspondence to Wangfeng Cai.

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Gong, Y., Wang, Y., Zhu, H. et al. Experimental Investigation of Hydrodynamic Characteristic of a New Rotating Stream Tray. Trans. Tianjin Univ. 25, 381–388 (2019). https://doi.org/10.1007/s12209-019-00189-9

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  • DOI: https://doi.org/10.1007/s12209-019-00189-9

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