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Received January 23, 2020
Accepted June 8, 2020
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Optimizing conical nozzle of venturi ejector in ejector loop reactor using computational fluid dynamics
1School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, P. R. China 2Chinese National Engineering Research Center of Coal Preparation and Purification, China University of Mining and Technology, Xuzhou 221116, Jiangsu, China 3Weihai New Era Chemical Machinery Co., LTD, Weihai 264200, P. R. China
xiaofeng.jiang@cumt.edu.cn
Korean Journal of Chemical Engineering, November 2020, 37(11), 1829-1835(7), 10.1007/s11814-020-0607-1
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Abstract
The structure of a conical nozzle is critical to the gas induction of a venturi ejector. In this work, the effect of nozzle structure on the gas induction was investigated by means of multiphase CFD and validating experiments. Under different structures, the maximal gas induction was obtained through analyzing the nozzle outlet velocity (NOV), nozzle inlet velocity (NIV), as well as nozzle shrinking angle (NSA). The simulated inlet pressure is positively proportional to inlet flow rate, which is in good agreement with experimental results. The simulated results reveal that the inlet pressure and gas induction increase with the increasing NOV. Considering the operational characteristics of centrifugal pump, the recommended NOV is about 21.8m/s. NIV and NSA show little impact on gas induction and inlet pressure. Based on the pipeline energy consumption, the recommended NIV is the same as the outlet velocity of centrifugal pump. The recommended NSA is about 20o to obtain the maximal gas induction.
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References
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