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过程工程学报 ›› 2021, Vol. 21 ›› Issue (1): 57-63.DOI: 10.12034/j.issn.1009-606X.220052

• 反应与分离 • 上一篇    下一篇

动态扩散渗析法回收盐酸的实验与模型分析

孙 帅1,2,3, 孙宏骞2,3, 宋 静2,3*, 曲景奎2,3, 王 勇2,3, 齐 涛2,3*   

  1. 1. 中国科学院大学化学工程学院,北京 100049 2. 中国科学院过程工程研究所绿色过程与工程重点实验室,北京 100190 3. 中国科学院过程工程研究所湿法冶金清洁生产技术国家工程实验室,北京 100190
  • 收稿日期:2020-02-19 修回日期:2020-03-28 出版日期:2021-01-22 发布日期:2021-01-21
  • 通讯作者: 宋静
  • 基金资助:
    中科院重点部署项目;中科院前沿科学重点研究项目;国家自然科学青年基金

Experimental and model analysis of hydrochloric acid recovery by dynamic diffusion dialysis

Shuai SUN1,2,3, Hongqian SUN2,3, Jing SONG2,3*, Jingkui QU2,3, Yong WANG2,3, Tao QI2,3*   

  1. 1. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China 2. Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China 3. National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
  • Received:2020-02-19 Revised:2020-03-28 Online:2021-01-22 Published:2021-01-21
  • Contact: Jing SONG

摘要: 近些年来,工业废酸的处理和回收逐渐成为困扰研究者的难题,膜分离技术以诸多优势成为研究重点。扩散渗析作为一种低能环保的膜分离技术,在废酸回收领域运用广泛,酸回收率一直是扩散渗析过程的重要指标。本工作以0.55 mol/L盐酸为原料进行动态扩散渗析实验,考察进料酸浓度、进料流量(620 mL/min)、水酸流量比(0.61.4)等操作参数对酸回收率的影响。通过无因次方法,针对特定的DF-120膜建立盐酸浓度和膜内渗透系数的经验公式,简化传质模拟,最终得到可以预测扩散渗析过程盐酸回收率的参数模型。对实验数据点进行分析,验证了数学模型的准确性。该模型也被用于更详细的实验操作条件下的预测,为实际工业生产提供了参考方法和理论依据。

关键词: 扩散渗析, 酸回收, 阴离子交换膜, 盐酸, 膜内渗透系数

Abstract: In recent years, membrane separation technology has become the focus of industrial waste acid treatment and recovery with many advantages. As a kind of environmentally friendly membrane separation technology, diffusion dialysis is widely used in the field of waste acid. The experiment was carried out with 0.55 mol/L hydrochloric acid as raw material. Besides, the effects of operating parameters such as the flow rate of feed acid (620 mL/min) and flow ratio of water and acid (0.61.4) were examined. The transport of hydrochloric acids through anion-exchange membrane DF-120 in a counter-current continuous dialyzer was investigated in detail. The important parameter, permeability coefficient of the membrane, was optimized by polynomial fitting. A simpler mathematical model of lumped parameters established, which could predict the hydrochloric acid recovery rate during the diffusion dialysis process. These obtained points were investigated to verify the mathematical model and it was proved excellent. The model was used for predictions under more detailed experimental operating conditions. It also provided reference methods and arguments for actual industrial production.

Key words: Diffusion dialysis, Acid recovery, Anion-exchange membrane, Hydrochloric acid, Continuous dialyzer.