文献类型：期刊文献

中文题名：芳烃抽提体系液滴发生过程传质影响因素研究

英文题名：Influencing factors of mass transfer in the droplet generation process of aromatics extraction system

作者：张耀辉[1];何潇潇[2];吴和平[2];朱华曈[2];卢浩[2]

机构：[1]中国石化工程建设有限公司工艺室,北京100101;[2]华东理工大学机械与动力工程学院,上海200237

年份：2025

卷号：42

期号：5

起止页码：138

中文期刊名：化学工业与工程

外文期刊名：Chemical Industry and Engineering

收录：;北大核心:【北大核心2023】；

基金：国家自然科学基金(52370077)。

语种：中文

中文关键词：芳烃抽提;环丁砜;液滴发生;动态传质;苯;甲苯;二甲苯

外文关键词：aromatics extraction;sulfolane;droplet formation;dynamic mass transfer;benzene;toluene;xylene

摘要：芳烃抽提效率与液滴尺寸及其运动状态密切相关,在环丁砜抽提体系中,液滴尺寸较大,其比表面积较小,且扩散速率受限,导致抽提效率低。液滴发生阶段是控制液滴尺寸和液液传质的关键,但目前有关液滴尺寸与发生过程对抽提效率影响规律的相关研究仍较缺乏。基于环丁砜液滴/芳烃抽提体系,利用高速摄像技术构建了液滴发生过程传质行为测试装置,探究了环丁砜液滴发生过程中的传质规律,考察了液滴粒径、芳烃浓度和连续相流速在液滴发生过程中的影响机制。发现芳烃浓度与传质速率成正比,当芳烃浓度由10%增加至50%时,传质速率由0.054增至0.468 kg·m^(-2)·s^(-1);在芳烃浓度为10%的情况下,连续相流速与传质速率成正比,当连续相流速由0增至0.016 m·s^(-1)时,传质速率由0.025增至0.086 kg·m^(-2)·s^(-1);液滴粒径与传质速率呈反比,当液滴粒径由1.006增至1.478 mm时,传质速率由降至0.023 kg·m^(-2)·s^(-1)。为优化抽提工艺参数、提高溶剂利用率和分离效率提供理论依据,推动技术在工业应用中的高效化和可持续发展。
The extraction efficiency of aromatic hydrocarbons is closely related to the droplet size and its motion state.In the sulfolane extraction system,the droplet size is large,the specific surface area is small,and the diffusion rate is limited,resulting in low extraction efficiency.The droplet occurrence stage is the key to controlling droplet size and liquid-liquid mass transfer.However,there is still a lack of relevant research on the influence of droplet size and occurrence process on extraction efficiency.In this paper,based on the sulfolane droplet/aromatics extraction system,a mass transfer behavior test device for the droplet generation process was constructed using high-speed camera technology.The mass transfer law in the process of sulfolane droplet generation was explored,and the influence mechanism of droplet size,aromatics concentration and continuous phase flow rate on the droplet occurrence process was inves-tigated.It was found that the aromatic hydrocarbon concentration was proportional to the mass transfer rate.When the aromatic hydrocarbon concentration increased from 10%to 50%,the mass transfer rate increased from 0.054 to 0.468 kg·m^(-2)·s^(-1).When the concentration of aromatics is 10%,the continuous phase flow rate is proportional to the mass transfer rate.When the continuous phase flow rate increases from 0 to 0.016 m·s^(-1),the mass transfer rate increases from 0.025 to 0.086 kg·m^(-2)·s^(-1).The droplet size is inversely proportional to the mass transfer rate.When the droplet size increases from 1.006 to 1.478 mm,the mass transfer rate decreases from 0.145 to 0.023 kg·m^(-2)·s^(-1).This study provides a the-oretical basis for optimizing extraction process parameters,improving solvent utilization and separation ef-ficiency,and promoting the efficient and sustainable development of technology in industrial applications.