湿式镁法烟气脱硫副产物MgSO_4热解回收MgO  

Pyrolysis Recovery of MgO from By-product MgSO_4 in Wet Flue Gas Desulfurization by Magnesium Oxide Scrubbing

作　　者：亢万忠[1,2] 沈志刚[1] 周彦波[1] 曾坤[1] 仝明[2] 鲁军[1] 

机构地区：[1]华东理工大学资源与环境工程学院,上海200237 [2]中国石化宁波技术研究院,浙江宁波315103

出　　处：《化工环保》2012年第1期57-60,共4页Environmental Protection of Chemical Industry

基　　金：上海市重点学科基金资助项目(B506)

摘　　要：通过对MgSO4的热解研究为湿式镁法烟气脱硫副产物的综合利用探索适宜的热解条件。实验结果表明,在升温速率为20℃/min、热解温度为850℃、恒温时间为2.0 h的条件下,由无水MgSO4热解制得的MgO收率高达99.8%,由MgSO4.7H2O热解制得的MgO收率仅为72.1%。由此表明,干燥的MgSO4对热解更有利。The pyrolysis of MgSOa was studied to discover the suitable pyrolysis conditions for comprehensive utilization of the by-product in wet flue gas desulfurization by magnesium oxide scrubbing. The experimental results show that under the conditions of heating rate 20 ℃/min, pyrolysis temperature 850 ℃ and pyrolysis time 2.0 h, the yield of MgO from MgSO4 pyrolysis is as high as 99.8%, while that from MgSO4 · 7H2O pyrolysis is only 72.1%. It indicates that dry MgSO4 is more favorable to pyrolysis.

关 键 词：烟气脱硫 二氧化硫 热解 硫酸镁 氧化镁 回收 综合利用 

分 类 号：X51[环境科学与工程—环境工程]