SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2023, Vol. 54 ›› Issue (2): 127-135.DOI: 10.1016/j.cjche.2022.03.020

• Full Length Article • 上一篇    下一篇

Experimental study on the desulfurization and evaporation characteristics of Ca(OH)2 droplets

Yilin Song, Yize Zhang, Hao Zhou   

  1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
  • 收稿日期:2021-12-08 修回日期:2022-03-23 出版日期:2023-02-28 发布日期:2023-05-11
  • 通讯作者: Hao Zhou,E-mail:zhouhao@zju.edu.cn
  • 基金资助:
    This work was supported by the National Natural Science Fund for Distinguished Young Scholars (No. 51825605).

Experimental study on the desulfurization and evaporation characteristics of Ca(OH)2 droplets

Yilin Song, Yize Zhang, Hao Zhou   

  1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
  • Received:2021-12-08 Revised:2022-03-23 Online:2023-02-28 Published:2023-05-11
  • Contact: Hao Zhou,E-mail:zhouhao@zju.edu.cn
  • Supported by:
    This work was supported by the National Natural Science Fund for Distinguished Young Scholars (No. 51825605).

摘要: The experiments were conducted to focus on the desulfurization and evaporation characteristics of lime slurry droplets at 298–383 K. We designed an evaporation-reaction chamber with quartz glass windows. The monodisperse slurry droplet stream was injected into the evaporation reaction chamber, and the inlet gas components (air, air + SO2) were introduced into the chamber. We applied the magnified digital in-line holography to measure the droplet parameters and calculated the evaporation rate. The effects of temperature, droplet concentration, and SO2 concentration on the evaporation rate of Ca(OH)2 droplets were discussed. Moreover, the Ca(OH)2 droplets under different experimental conditions were sampled, and the droplets were observed and analyzed using an off-line microscope. The evaporation rate of the Ca(OH)2 droplet increased at first, and then decreased during the falling process, and remained constant at last. The average evaporation rate of the Ca(OH)2 droplets increased significantly with the temperature increasing.

关键词: Magnified digital in-line holography, Evaporation, Gas–liquid absorption reaction, Ca(OH)2, Micro-droplet

Abstract: The experiments were conducted to focus on the desulfurization and evaporation characteristics of lime slurry droplets at 298–383 K. We designed an evaporation-reaction chamber with quartz glass windows. The monodisperse slurry droplet stream was injected into the evaporation reaction chamber, and the inlet gas components (air, air + SO2) were introduced into the chamber. We applied the magnified digital in-line holography to measure the droplet parameters and calculated the evaporation rate. The effects of temperature, droplet concentration, and SO2 concentration on the evaporation rate of Ca(OH)2 droplets were discussed. Moreover, the Ca(OH)2 droplets under different experimental conditions were sampled, and the droplets were observed and analyzed using an off-line microscope. The evaporation rate of the Ca(OH)2 droplet increased at first, and then decreased during the falling process, and remained constant at last. The average evaporation rate of the Ca(OH)2 droplets increased significantly with the temperature increasing.

Key words: Magnified digital in-line holography, Evaporation, Gas–liquid absorption reaction, Ca(OH)2, Micro-droplet