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过程工程学报 ›› 2022, Vol. 22 ›› Issue (11): 1479-1489.DOI: 10.12034/j.issn.1009-606X.221320

• 研究论文 • 上一篇    下一篇

微通道中钒的液-液流型和萃取传质动力学研究

骆晶1,2， 温嘉玮2， 兰春铭3， 张西华1*， 宁朋歌2*   

  1. 1. 上海第二工业大学
    2. 中国石油大学（北京）新能源与材料学院
    3. 中国科学院过程工程研究所
    4. 隆华科技集团（洛阳）股份有限公司
  • 收稿日期:2021-10-09 修回日期:2022-02-05 出版日期:2022-11-28 发布日期:2022-11-28
  • 通讯作者: 张西华 zhangxh@sspu.edu.cn
  • 作者简介:骆晶(1996-)，女，安徽省马鞍山市人，硕士研究生，环境工程专业；通讯联系人，张西华，E-mail: zhangxh@sspu.edu.cn；宁朋歌，E-mail: pgning@ipe.ac.cn.
  • 基金资助:
    国家自然科学基金项目;国家重点研发计划课题;上海高校知识服务平台项目资助;中国博士后科学基金项目

Liquid-liquid two-phase flow patterns and mass transfer kinetics for vanadium extraction in microchannels

Jing LUO1,2,  Jiawei WEN2,  Chunming LAN3,  Xihua ZHANG1*,  Pengge NING2*   

  1. 1. School of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai Collaborative Innovation Center for WEEE Recycling, Shanghai 201209, China 2. Beijing Engineering Research Center of Process Pollution Control, National Engineering Research Center of Green Recycling for Strategic Metal Resources, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 3. Longhua Technology Group Co., Ltd., Luoyang, Henan 471000, China
  • Received:2021-10-09 Revised:2022-02-05 Online:2022-11-28 Published:2022-11-28

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摘要： 采用伯胺N1923萃取剂在微通道中研究V(V)的液-液流型和萃取传质动力学，以15vol% N1923作为连续相、钒氧酸根水溶液作为分散相，研究不同流速下两不混溶相的流型变化规律及两相停留时间和微通道管径作为流速的函数对传质的影响。随两相流速增大，段塞流长度和比界面面积基本不变，且两相流体由Raydrop微通道流入外接毛细管微通道时由于微通道的扩张会改变两相流动方式，使同一实验条件下在微通道中同时出现多种流型，与此同时两相流速和总体积传质系数(kLa)呈正相关，表明流型在本研究体系中对传质的影响可忽略。在相同管径通道内，停留时间与总体积传质系数呈负相关，表明在两相接触通道入口处发生了显著传质。在相同的两相混合速度和相比下，254 μm的管径传质效果是750 μm的9倍，表明小管径内传质效果更加，循环强度更大。最后将实验总体积传质系数结果与总体积传质系数的经验式进行了关联，有望为实现将微通道放大的绿色冶金技术提供理论基础。

关键词: 钒, 微通道, 流型, 传质

Abstract: The liquid-liquid flow pattern and extraction mass transfer kinetics for V(V) were investigated in microchannels using primary amine N1923 extractant. 15vol% N1923 was used as the continuous phase and V(V) aqueous solution as the dispersed phase. The flow patterns of two immiscibility phases at different flow rates and the effects of residence time and microchannel diameter on mass transfer as a function of flow rate were studied. The study found that compared to 1:1, with the increase of the two-phase flow velocity, the slug flow length and the specific interface area remained unchanged, and two phase fluid by Raydrop microchannel flowed into the external capillary microchannel because of the expansion of microchannel changed the way of two-phase flow, made the same experimental conditions at the same time appeared a variety of flow pattern in the microchannel. At the same time the two-phase flow velocity was positively correlated with the total mass transfer coefficient, it showed that the influence of flow pattern on mass transfer can be ignored in this research system. In addition, the residence time was negatively correlated with the total mass transfer coefficient in the same channel, which indicated that significant mass transfer occurred at the entrance of the two-phase contact channel, and the mass transfer rate was the highest at this time. After the diameter of the external capillary microchannel was changed, the mass transfer effect of 254 μm tube diameter was 9 times that of 750 μm tube diameter at the same mixing rate, which indicated that the inner circulation strength and specific interface area of small tube diameter were more significant. Finally, the experimental results of the total volume mass transfer coefficient were correlated with the empirical formula of the total volume mass transfer coefficient, which provided a theoretical basis for the realization of green metallurgical technology of microchannel amplification.

Key words: V (V), microchannel, flow pattern, mass transfer