Zhang Rui, Si Xiaodong, Zhao Lingling, Yang Linjun, Wu Hao
Key Laboratory of Energy Thermal Conversion and Control, Ministry of Education, School of Energy and Environment, Southeast University Nanjing 210096 Jiangsu Province China
School of Energy and Power, Jiangsu University of Science and Technology Zhenjiang 212003 Jiangsu Province China.
RSC Adv. 2020 Oct 20;10(63):38515-38523. doi: 10.1039/d0ra05699e. eCollection 2020 Oct 15.
In this paper, control over the emission of sulfur trioxide aerosols was investigated based on heterogeneous condensation in the wet flue gas desulfurization process. The influence of the deflectors tray of the desulfurization tower on the removal performance of the sulfur trioxide aerosols was also studied. The results show that the critical supersaturation degree of sulfur trioxide aerosols is in inverse proportion to the sizes. Heterogeneous condensation has a significant effect on the reduction of sulfur trioxide aerosols. The number concentration of the sulfur trioxide aerosols with sizes <0.1 μm decreases, while the number concentration of sizes >0.1 μm increases at the outlet with this method. The relative humidity of the flue gas is likely to be the most influential in the formation of a supersaturated environment and the removal of sulfur trioxide aerosols. Addition of the tray in the desulfurization tower also increases the reduction of sulfur trioxide aerosols. Heterogeneous condensation can improve the removal efficiency of sulfur trioxide aerosols by 14.3% as well as the installation of a tray by 21.4%.
本文基于湿法烟气脱硫过程中的异相冷凝，研究了三氧化硫气溶胶排放的控制。还研究了脱硫塔导流板托盘对三氧化硫气溶胶脱除性能的影响。结果表明，三氧化硫气溶胶的临界过饱和度与粒径成反比。异相冷凝对三氧化硫气溶胶的减少有显著影响。采用该方法时，出口处粒径<0.1μm的三氧化硫气溶胶数浓度降低，而粒径>0.1μm的数浓度增加。烟气的相对湿度可能是形成过饱和环境和脱除三氧化硫气溶胶最具影响力的因素。在脱硫塔中添加托盘也增加了三氧化硫气溶胶的脱除量。异相冷凝可使三氧化硫气溶胶的脱除效率提高14.3%，安装托盘可提高21.4%。
