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

doi:10.1016/j.cjche.2022.03.020

Abstract

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

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

Yilin Song, Yize Zhang, Hao Zhou. Experimental study on the desulfurization and evaporation characteristics of Ca(OH)₂ droplets[J]. Chinese Journal of Chemical Engineering, 2023, 54(2): 127-135.

Yilin Song, Yize Zhang, Hao Zhou. Experimental study on the desulfurization and evaporation characteristics of Ca(OH)₂ droplets[J]. 中国化学工程学报, 2023, 54(2): 127-135.

References

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

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

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