新OG系统旋流脱水器气液分离特性数值研究

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Abstract According to the internal flow characteristics of cyclone dehydrator, based on the Euler-Lagrangian method, the gas-liquid two-phase flow inside the cyclone dehydrator was numerically calculated and analyzed, the effects of droplet diameter, inlet mass quality of gas and turbulent diffusion on flow field distribution, dehydration efficiency, outlet mass quality of gas and outlet particle size distribution were studied. The results showed that, when mass flow rate was constant, the inlet and outlet pressure drop of cyclone dehydrator increased significantly with the inlet mass quality of gas. For droplets of single-diameter, without considering the effect of turbulent diffusion, the dehydration efficiency increasedas the inlet mass quality of gas increased. When considered the effect of turbulent diffusion, the trend was opposite for small droplets(0.1~1μm).The increase of continuous phase velocity promoted turbulence diffusion and made turbulence more turbulent, but the dehydration efficiency was higher than that without considering the effect of turbulent diffusion. Under the condition of mixed particle size, the dehydration efficiency and outlet mass quality of gas increasedas the inlet dryness increased. The calculation showed that the effect of turbulent diffusion promoted the separation of the mixed diameter droplets. As the inlet mass quality of gas increased, the peak value of the droplet mass fraction gradually moved toward small particle size, and the particle size distribution range gradually decreased.

Key words： new OG system cyclone dehydrator gas-liquid separation numerical study

Received: 29 April 2019

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X51

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	Articles by authors
	LIU Zhe
	QIAN Fu-ping
	ZHANG Tian
	HU Jia
	XIA Yong-jun
	LU Jin-li

Cite this article:

LIU Zhe,QIAN Fu-ping,ZHANG Tian等. Numerical study on gas-liquid separation characteristics of cyclone dehydrator in the new OG system[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(11): 4628-4637.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I11/4628

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