SO_2/Hg removal from flue gas by dry FGD

查看全文 作　　者：Wang [1]Fan;Wang [1]Hongmei;Zhang [1]Fan;Zhu [1]Jinwei;Tian [1]Gang;Liu [1]Yu;Mao [1]Jixian

机构地区：[1]Chinese Research Academy of Environmental Sciences,Beijing 100012,China

出　　处：《International Journal of Mining Science and Technology》索引2012年第22卷第1期,共4页

基　　金：supported by the National High-Tech R&D Program of China (No. 2008AA06Z318);the Ministry of Environmental Protection of China (Nos. 201009048 and 200909025) 摘　　要：To study the mechanism of SO 2 and Hg removal from flue gas, an experimental packed bed reactor was designed to simulate the dry FGD, where a mixture of lime and fly ash in ratio 1:3 w/w was used as the SO 2 and Hg sorbent, and steam at temperature of 100℃ was applied for activation of the sorbent, while the activation time set to 20 min. The experimental factors including the SO 2 /Hg sorbent characteristics, 50% breakthrough time for SO 2 /Hg removal, sorbent packed bed depth and reaction temperature were investigated. The experimental results show that after steam activation, the BET specific surface area and specific pore volume increased from 37.8 to 45.5 m 2 /g and from 0.42 to 0.51 cm 3 /g, respectively. With activation of the sorbent by steam, the 50% breakthrough times of SO 2 and Hg removal increased from 34 to 42 min and from 23 to 45 min, respectively. When the packed bed depth was increased from 5 to 25 mm, the 50% breakthrough times for Hg and SO 2 removal increased from 12 to 52 min and from 6 to 47 min, respectively. With the increase of the reaction temperature, the 50% breakthrough of SO 2/Hg removal decreased accordingly. Steam activation can efficiently improve SO 2 /Hg removal simultaneously. 关键词：干法烟气脱硫固定床反应器水蒸气活化时间设置二氧化硫反应温度蒸汽活化吸附剂

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SO_2/Hg removal from flue gas by dry FGD

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