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Open AccessArticle

Oil-Water-Gas Three-Phase Separation in Multitube T-Junction Separators

by Lele Yang 1,2, Jing Wang 1,2, Yong Ma 1,2,*, Sen Liu 1, Jun Tang 3 and Yongbing Zhu 3
1
School of Marine Engineering and Technology, Sun Yat-sen University, Guangzhou 510275, China
2
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
3
Guangzhou Marine Geological Survey, Guangdong 510075, China
*
Author to whom correspondence should be addressed.
Water 2019, 11(12), 2655; https://doi.org/10.3390/w11122655
Received: 21 October 2019 / Revised: 14 December 2019 / Accepted: 15 December 2019 / Published: 16 December 2019
(This article belongs to the Section Wastewater Treatment and Reuse)
Multitube T-junctions can be used as an oil-water-gas pre-separator in the oil and gas industry. In this paper, the mixture model, coupled with the k-ε turbulent model, was applied for a simulation of the oil-water-gas three-phase flow characteristics in the multitube T-junction separator. The oil droplet size ranged from 1 to 4 mm. The water content ranged from 5% to 20% and the gas content from 3% to 25%. According to the phase separation results for different droplet sizes, it was found that, as the oil droplet size increased, the water content at the water outlet initially increased and then tended to be stable. Therefore, it was necessary to increase the oil droplet size through corresponding measures before flowing into the T-junction for separation. For the separator with an inner diameter of 50 mm, the oil content at the inlet had a great influence on the water-oil separation performance, and the water-oil separation performance was obviously improved as the oil content decreased. Owing to increased residence time, the oil content had little influence on the water-oil separation performance when the separator with an inner diameter of 100 mm was applied. Moreover, for the separator with an inner diameter of 100 mm, the oil content had little influence on the degassing effect, and more than 90% of the gas could be discharged from the gas outlet. The separation performance of the multitube T-junction separator became worse as the inlet gas content increased. View Full-Text
Keywords: oil-water-gas separation; multitube T-junction; oil droplet; oil content; gas content oil-water-gas separation; multitube T-junction; oil droplet; oil content; gas content
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Yang, L.; Wang, J.; Ma, Y.; Liu, S.; Tang, J.; Zhu, Y. Oil-Water-Gas Three-Phase Separation in Multitube T-Junction Separators. Water 2019, 11, 2655.

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