应用化学 ›› 2025, Vol. 42 ›› Issue (4): 542-551.DOI: 10.19894/j.issn.1000-0518.240273

• 研究论文 • 上一篇    下一篇

脉冲错流筛板塔应用于含苯酚废水体系的传质特性

孙广垠1, 李亚洲1,2, 刘小燕3, 李龙祥1, 吕国华4, 谭博仁2, 王勇2()   

  1. 1.河北工程大学能源与环境工程学院,邯郸 056038
    2.中国科学院过程工程研究所,战略金属资源绿色循环利用国家工程研究中心,北京 100190
    3.山东清汇环境咨询有限公司,青岛 266100
    4.河北中化鑫宝化工科技有限公司,邯郸 056500
  • 收稿日期:2024-08-27 接受日期:2025-03-08 出版日期:2025-04-01 发布日期:2025-05-14
  • 通讯作者: 王勇
  • 作者简介:wangyong@ipe.ac.cn
  • 基金资助:
    国家自然科学基金(22178350);国家自然科学基金重大研究计划(92262305)

Mass Transfer Coefficient in a Pulsed Cross-Flow Sieve Plate Column for Phenol-Containing Wastewater System

Guang-Yin SUN1, Ya-Zhou LI1,2, Xiao-Yan LIU3, Long-Xiang LI1, Guo-Hua LYU4, Bo-Ren TAN2, Yong WANG2()   

  1. 1.College of Energy and Environmental Engineering,Hebei University of Engineering,Handan 056038,China
    2.National Engineering Research Center for Green Recycling of Strategic Metal Resources Technology,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China
    3.Shandong Qinghui Environmental Consulting Co. ,Ltd. ,Qingdao 266100,China
    4.Hebei Sinochem Xinbao Chemical Technology Co. ,Ltd. ,Handan 056500,China
  • Received:2024-08-27 Accepted:2025-03-08 Published:2025-04-01 Online:2025-05-14
  • Contact: Yong WANG
  • Supported by:
    the National Natural Science Foundation of China(22178350);the Major Research Plan of the National Natural Science Foundation of China(92262305)

摘要:

针对某工业含酚废水,采用脉冲错流筛板塔连续萃取,通过对萃取体系中的水力学和传质特性研究,实现对含酚废水中苯酚的分离。结果表明: 分散相持液量(xd)随脉冲强度(Af)的逐步提高而下降并随后上升,在Af为0.0126 m/s时,xd最小; 液滴索特直径(d32)随Af的提高逐渐减小,在Af为0.0272 m/s时,d32减小至约1.3 mm;随两相流速的增加,xd增大,但d32无明显变化; 脉冲错流筛板萃取塔对苯酚萃取率随着Af的增大先减小后增加,在最佳萃取操作条件下,萃取效率可达98.96%; 通过轴向扩散模型对萃取塔总传质系数进行求解,并建立了有、无脉冲情况下均适用的总传质系数预测模型,实验值与模型预测值的平均相对误差<10%,为该萃取塔在含苯酚废水处理中的设计与应用提供重要的技术支撑。

关键词: 错流筛板萃取塔, 脉冲, 分散相持液量, 液滴直径, 传质系数

Abstract:

The hydraulic properties and mass transfer characteristics of a pulsed cross-flow sieve plate extraction column were investigated with phenol-containing wastewater extraction system, and the separation of phenol was realized. The results show that dispersed-phase holdup (xd) decreases gradually with the increase of pulse intensity (Af) and then increases, and xd reaches the minimum value at the Af of 0.0126 m/s, the Sauter mean (d32) decreases with the Af increasing, and the d32 decreases to about 1.3 mm at the Af of 0.0272 m/s. With the increase of two-phase flow rate, the xd increases, but the phase flowrate has no significant effect on the d32. As the Af increases, the extraction efficiency of phenol decreases first and then increases, which finally reaches 98.96%. The mass transfer coefficient was obtained using the axial diffusion model, and a prediction model was developed. The average relative error between experimental and calculated results was less than 10%, which provide a fundamental help for the equipment design and application.

Key words: Cross-flow sieve plate extraction column, Pulse, Dispersed-phase holdup, Droplet size, Mass transfer coefficient

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