煤燃烧温度对金属元素迁移的影响  

Effect of Coal Combustion Temperature on the Migration of Metal Elements

作　　者：康艳红[1] 李光哲[1] 曾敬[1] 贾莹光 李国德[1] 

机构地区：[1]沈阳师范大学辽宁省燃煤二氧化碳减排与多污染物控制开放重点实验室,辽宁省沈阳市110034 [2]国家电站燃烧工程技术研究中心,辽宁省沈阳市110034

出　　处：《电力设备》2008年第8期48-50,共3页Electrical Equipment

基　　金：辽宁省教育厅科学技术研究项目(20060843);沈阳师范大学实验中心主任基金项目资助(SY200701)

摘　　要：通过控制煤不同燃烧温度,分析不同燃烧温度下底灰中Al、Fe、Ca、K、Mg、Ba、Sr、Pb、Cr、Cu、Cd、Mn 12种金属元素的含量,理论上求得每克原煤的烟气排放量。分析结果表明:Al、Ba、Cr、K在600～800℃温度范围内挥发较快;Fe、Sr、Mn、Ca在温度达到700℃后,保持持续的挥发性;Pb、Cd、Mg在300～1300℃温度内,挥发性随温度的变化不明显;除Pb、Cd、Cu、Cr外,大部分金属元素在800℃以后烟气排放量明显增加。At the different combustion temperatures of boiler,the bottom ashes were collected and Al ,Fe ,Ca ,K ,Mg,Ba,Sr ,Pb、Cr ,Cu, Cd and Mn in the bottom ashes were analyzed, and the emission quantities of these elements in the flue gas of one g raw coal were determined theoretically. The analysis results indicated that, Al ,Ba,Cr and K volatilized faster in 600 - 800 ℃ temperature range; Fe ,Sr ,Mn and Ca kept the continuous volatility after the temperature reached 700 ℃ ;the volatility of P b,Cd and M g varied insignificantly with temperature in 300 - 1300 ℃ temperature range; except for Pb,Cd,Cu and Cr, the emission quantities of other metal elements inthe flue gas increased remarkably after 800 ℃.

关 键 词：煤燃烧 金属元素 迁移特性 

分 类 号：TQ533.5[化学工程—煤化学工程] TQ534