Absorption of SO2 by Granular Limestone Slurrywith Acetic Acid Additive
A new wet FGD processes which SO2 was absorbed in the bubble reactor using granular limestone simultaneously adding acetic acid had been proposed. The main difference compared to conventional wet FGD process was to utilize granular limestone directly as a desulphurization reagent simultaneously adding acetic acid. Thus, the pulverizing of limestone, which causes power consumption, can be saved. Only using granular limestone (210μm) directly as absorbent without acetic acid, SO2 removal efficiency and limestone utilization were too low respective 60.7％ and 44％. Adding 10–30 mmol/L acetic acid, degree of desulphurization was increased to 95％ and the limestone utilization was enhanced to 93.5％, comparison with fine limestone, the desulphurization efficiency and limestone utilization were respective 88％ and 92.9％ at the same operating conditions. Adding organic acid, buffer capacity of system was enhanced. And the influent factors such as the concentration of acetic acid, limestone slurry and SO2, residence time of flue gas were tested. The mechanism of acetic acid promoting SO2 absorption was suggested.
new wet FGD bubbling reactor granular limestone acetic acid SO2
LIU Shengyu LIU Pei YE Zhixiang LIU Jianying ZOU Changwu
Department of Environmental Engineering, Chengdu University of Information Technology, Chengdu 610225, Sichuan, China
国际会议
2007环境科学与技术国际会议(The 2007 International Symposium on Environmental Science and Technology)
北京
英文
2007-11-13（万方平台首次上网日期，不代表论文的发表时间）