Droplet Size Distributions and Pressure Control in the Gas-Liquid Cylindrical Cyclone

Lele Yang, Jing Wang, Liangshuai Zou
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Abstract

The gas–liquid cylindrical cyclone (GLCC) employs gravitational and centrifugal forces to realize gas-liquid separation. The aim of this study is to understand the droplet size distribution and pressure control in the GLCC via experiment and numerical analysis. The droplet size and pressure distributions were measured using Malvern RTsizer and pressure transmitters, respectively. The Discrete Phase Model was used to numerically analyze the swirling hydrodynamics of the GLCC. The results showed that the increase in the gas superficial velocity decreased the droplet size distribution at the inlet as a whole due to the shear effect and flow instability. The increase in the liquid superficial velocity only increased the small droplet size distribution at the inlet for the limitation of the gas’s carrying capacity. The pressure loss mainly occurred at the inlet and the overflow outlet. When the liquid level was remained below the inlet and above the liquid outlet, the liquid level and the liquid outlet section approximately met the Bernoulli equation for a finite large flow beam. With the increase in the pressure at the gas outlet, the liquid film fell back and the separation efficiency increased gradually. These results are helpful for further spreading applications of the GLCC in industry.
气液圆柱旋风分离器中液滴粒径分布及压力控制
气液圆柱旋风分离器(GLCC)利用重力和离心力实现气液分离。本研究的目的是通过实验和数值分析来了解GLCC中液滴的大小分布和压力控制。采用马尔文RTsizer和压力变送器分别测量液滴大小和压力分布。采用离散相模型对GLCC的旋流力学进行了数值分析。结果表明,由于剪切效应和流动不稳定性,气体表面速度的增加整体上降低了入口液滴的尺寸分布;由于气体承载能力的限制,液体表面速度的增加只增加了进口处的小液滴尺寸分布。压力损失主要发生在进口和溢流出口。当液位保持在进口下方和出口上方时,液位和出口截面近似满足有限大流梁的伯努利方程。随着出气口压力的增大,液膜回落,分离效率逐渐提高。这些结果有助于进一步推广GLCC在工业上的应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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