循环镁法烟气脱硫产物中硫酸镁(MgSO_4)的热解研究  

Study on pyrolysis of magnesium sulfates produced in regenerative magnesia scrubbing fuel gas desulfurization (FGD) system

作　　者：张博[1] 张晓伟[1] 仝明[1,2] 陈昕[1,2] 林大泉[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]中国石化集团公司烟气脱硫技术中心,上海200030

出　　处：《化学工程师》2009年第5期13-15,20,共4页Chemical Engineer

基　　金：上海市重点学科资助项目(B506)

摘　　要：循环镁法烟气脱硫工艺是利用Mg(OH)2浆液吸收烟气中的SO2,脱硫副产物经过热解还原为MgO,再次制浆从而使之被循环利用。继讨论了MgSO3的最佳热解条件后,本文旨在进一步研究MgSO4的热解条件,以便寻找回收脱硫副产物的最佳条件。优化各个因素后得到MgSO4的最佳热解温度为850℃,热解时间为2h。热解产物通过X-衍射、柠檬酸法CAA法进行分析,得出该条件下MgSO4的分解率、产物MgO的纯度与反应活性最佳。Magnesium hydroxide slurry was used for sulfur dioxide absorption in regenerative magnesia scrubbing fuel gas desulfurization （FGD） system. Magnesia was regenerated from desulfurization by-products through pyrolysis process and was applied in the system as resources recycling. Based on our former study on pyrolysis of Mg- SO3, this study focuses on discussions of pyrolysis condition of MgSO4 in order to find an appropriate recycling way of FGD by-products. An optimal magnesia yield was gained under a temperature of 850℃ and 2 h as pyrolysis time. Results of X-ray diffraction （XRD） and citric acid activity （CAA） also approved that the decomposition rate and the purity of recycled magnesia under the condition are superior.

关 键 词：镁法循环 烟气脱硫 MgSO4 MGO 热解 

分 类 号：TQ132.2[化学工程—无机化工]