Modeling Study of Selenium Migration Behavior in Wet Flue Gas Desulfurization Spray Towers

• DOI: 10.1021/acs.est.0c04700
• Publication Date: 2020-10-23T06:11:00Z
• Authors: Renjie Zou; Guangqian Luo; Can Fang; Haoyu Zhang; Zehua Li; Hongyun Hu; Xian Li; Hong Yao
• Keywords: Air Pollutants; Selenium; Coal; 13. Climate action; Gases; 01 natural sciences; 7. Clean energy; Power Plants; 0105 earth and related environmental sciences

Wet flue gas desulfurization (WFGD) system is the core equipment for removing SO2 from coal-fired power plants, and it also has an important synergistic effect on removal of selenium. However, efficiency Se across WFGD systems not as expected, varies greatly in different units (12.5-96%). In this study, a mathematical model was established to quantitatively describe selenium migration behavior spray towers, including conversion gaseous particulate capture SeO2 particles by droplets. The calculation results show that tower can be divided into three stages: preparation, condensation, removal. condensation stage significantly affected distribution its total efficiency. Furthermore, five factors which may affect were investigated. Among them, inlet particle size droplet temperature had great impacts outlet concentration, reason unstable efficiencies. This study help understanding process towers provide some guidance development specific control technologies.