【摘要】 介绍了生物质与煤共燃的研究流程及其主要的研究方法 .通过对三种主要农业剩余生物质 (锯屑、谷壳和花生壳 )热解过程中的失重率变化、物理性质变化、工业分析变化、元素分析变化和发热量变化的研究发现 ,三种生物质在热解温度 2 2 0℃～ 3 0 0℃ ,热解时间 3 0 min～ 6 0 min下进行低温热解时 ,热解过程主要受热解温度控制 ,受热解时间控制较弱 .随热解温度升高 ,热解时间延长 ,生物质的热失重率逐渐升高 ;生物质逐渐变得易于研磨 ;在工业分析上挥发分逐渐减少 ,固定碳及灰分不断提高 ,水分含量大幅下降 ;在元素分析上 O元素的含量不断下降 ,C元素的含量不断上升 ,从而发热量不断增加 .研究表明 ,当热解温度为 2 70℃～ 3 0 0℃时 ,热解生物质的各项性质可与煤接近 .更多还原

【Abstract】 Based on the co-firing significances of biomass with coal,this paper introduces its research flow and its primary study methods.Through the study on the changes of the three main agricultural residues(sawdust,rice bull and peanut shell)in weight loss,physical characteristics,proximate analysis,ultimate analysis and heat value during the process of pyrolysis with pyrolysis temperature of 220-300 ℃ and pyrolysis duration of 30-60 min,this paper draws a conclusion that the pyrolysis process of biomass is mainly controlled by pyrolysis temperature but less by pyrolysis duration.As pyrolyssis temperature rises and pyrolysis duration extends,the following changes occur:the weight loss rate of biomass rises by degrees;the biomass grindability improves gradually;in terms of proximate analysis,volatile matter content declines,fixed carbon and ash content ascends and moisture content declines dramatically;concerning ultimate analysis,the content of element O continouously declines and the content of element C continuously increases,which leads to the sustaining increment of heat value.The study also reflects that all the properties of biomass approach to coal at the pyrolysis temperature of 270-300 ℃更多还原