Utilization of Desulfurization Gypsum to Producing SO2 and Cao in Multi-Stage Fluidized Bed

摘要：

With emission control becomes more and more stringent,flue gas desulphurization (FGD) is commonly employed for desulfurization.However,the product of FGD,gypsum,causes the unexpected environmental problems.How to utilize the byproduct of FGD effectively and economically is a challenging task. This paper proposed the new technical process to produce SO2 and CaO by reducing the gypsum in multistage fluidized bed reactor with different atmosphere.In addition,some preliminary experiments were carried out in PTGA.The results show that CO concentration has little effect on the initial decomposing temperature,but affect the decomposing rate of phosphogypsum obviously.The decomposing product composed of CaS and CaO simultaneously.The ratio of the two products was determined by CO concentration.Lower CO content benefits to produce more CO product and more SO2.The decomposition reaction of phosphogypusm in reducing atmosphere is parallel competition reaction.Therefore,it is necessary to eliminate the effect of CaS and other byproduct efficiently by the new technology,which utilize multi-atmosphere in multistage fluidized bed reactors.

关键词： Desulfurization gypsum reduction fluidized bed utilization

作者: Zhu Miao Tao Wang Hairui Yang Hai Zhang Xuyi Zhang

作者单位: Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Ther Key Laboratory for Thermal Science and Power Engineering of Ministry of ducation Department of Therm Key Laboratory for Thermal Science and Power Engineering of Ministry of Education Department of Ther

会议类型: 国际会议

会议名称: The 7th International Symposium on Coal Combustion(第七届国际煤燃烧学术会议)

会议地点: 哈尔滨

会议语种:英文

页码: 415-418

在线出版日期: 2011-07-19（万方平台首次上网日期，不代表论文的发表时间）