文献类型：期刊文献

英文题名：High Efficiency Separation of Fine Coke Powders by the Novel Jet-Swirl Scrubber: Characteristics and Mechanisms

作者：Lv, Fuwei[1]; Wang, Bingjie[1]; Yan, Shijie[1]; Yang, Xiaoyong[1]; Bai, Zhishan[1]; Ma, Likun[1]

机构：[1] School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230326485)

语种：英文

外文关键词：Coke - Drops - Efficiency - Gases - Optimization - Powders - Scrubbers - Vortex flow

摘要：The deep removal of fine coke powders is an urgent need and remains a great challenge for the stable operation of the delayed coke system. Herein, a novel jet-swirl scrubber was developed. A combined approach utilizing CFD and DPM was employed to investigate the mechanism of droplet fragmentation. The results indicate that droplets undergo two stages of fragmentation in the convergent and throat sections under the influence of turbulent vortex structures. This leads to a rapid reduction in droplet size and an effective dispersion. Thorough mixing with the gas phase occurs in the divergent section, facilitating enhanced capture of coke powders. Cold model experiments were conducted to examine the relationship between droplet size, coke powders capture efficiency, and gas-liquid separation efficiency. Under the condition of optimized critical droplet size 0.106 mm by adjusting the flow rate, the removal efficient of coke powders was up to 99.57%. This work provides valuable technical support for further development and process optimization of the decoking powder unit in delayed coking system. ? 2023, The Authors. All rights reserved.