Structure Optimization of CFB Reactor for Moderate Temperature FGD

摘要：

The gas velocity distribution,sorbent particle concentration distribution and particle residence time in circulating fluidized bed (CFB) reactors for moderate temperature flue gas desulfurization (FGD) have significant influence on the desulfurization efficiency and the sorbent calcium conversion ratio for sulfur reaction.Experimental and numerical methods were used to investigate the influence of the key reactor structures,including the reactor outlet structure,internal structure,feed port and circulating port,on the gas velocity distribution,sorbent particle concentration distribution and particle residence time.Experimental results showed that the desulfurization efficiency increased 5-10％ when the internal structure was added in the CFB reactor.Numerical analysis results showed that the particle residence time of the feed particles with the average diameter of 89 urn and 9 um increased 40％ and 17％ respectively,and the particle residence time of the circulating particles with the average diameter of 116 um increased 28％ after reactor structure optimization.The particle concentration distribution also improved significantly,which was good for improving the contact efficiency between the sorbent particles and SO2.In addition,the optimization guidelines were proposed to further increase the desulfurization efficiency and the sorbent calcium conversion ratio.

关键词： moderate temperature desulfurization CFB reactor rapidly hydrated sorbent particle residence time

作者: Yuan Li Jie Zhang Kai Zheng Changfu You

作者单位: Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Thermal Engineering,Tsinghua University,Beijing 100084,China

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: 199-204

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）