Pan Danping, Yang Linjun, Wu Hao, Huang Rongting
a Key Laboratory of Energy Thermal Conversion and Control, Ministry of Education , Southeast University , Nanjing , Jiangsu Province , People's Republic of China.
J Air Waste Manag Assoc. 2017 Mar;67(3):352-357. doi: 10.1080/10962247.2016.1202155.
With increasing attention on sulfuric acid emission, investigations on the removal characteristics of sulfuric acid aerosols by the limestone gypsum wet flue gas desulfurization (WFGD) system and the wet electrostatic precipitator (WESP) were carried out in two coal-fired power plants, and the effects of the WFGD scrubber type and the flue gas characteristics were discussed. The results showed that it was necessary to install the WESP device after desulfurization, as the WFGD system was inefficient to remove sulfuric acid aerosols from the flue gas. The removal efficiency of sulfuric acid aerosols in the WFGD system with double scrubbers ranged from 50% to 65%, which was higher than that with a single scrubber, ranging from 30% to 40%. Furthermore, the removal efficiency of WESP on the sulfuric acid aerosols was from 47.9% to 52.4%. With increased concentrations of SO and particles in the flue gas, the removal efficiencies of the WFGD and the WESP on the sulfuric acid aerosols were increased.
Investigations on removal of sulfuric acid aerosols by the WFGD and the WESP in the power plants were aimed at the control of sulfuric acid emission. The results showed that the improvement of the WFGD system was beneficial for the reduction of sulfuric acid emission, while the WESP system was essential to control the final sulfuric acid aerosol concentration.
随着对硫酸排放的关注度不断提高，在两家燃煤电厂开展了关于石灰石-石膏湿法烟气脱硫（WFGD）系统和湿式静电除尘器（WESP）对硫酸气溶胶去除特性的研究，并讨论了WFGD洗涤器类型和烟气特性的影响。结果表明，脱硫后安装WESP装置是必要的，因为WFGD系统从烟气中去除硫酸气溶胶的效率较低。双洗涤器WFGD系统对硫酸气溶胶的去除效率在50%至65%之间，高于单洗涤器的30%至40%。此外，WESP对硫酸气溶胶的去除效率为47.9%至52.4%。随着烟气中SO和颗粒物浓度的增加，WFGD和WESP对硫酸气溶胶的去除效率提高。
对电厂中WFGD和WESP去除硫酸气溶胶的研究旨在控制硫酸排放。结果表明，改进WFGD系统有利于减少硫酸排放，而WESP系统对于控制最终硫酸气溶胶浓度至关重要。
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