秸秆等温干燥热质传输机理研究(Ⅰ)——TG/DSC实验分析  

RESEARCH ON DRYING MECHANISM OF HEAT AND MASS TRANSFER OF STALK(Ⅰ)— TG/DSC EXPERIMENTAL ANALYSIS

作　　者：陈登宇[1] 张栋[1] 朱锡锋[1] 

机构地区：[1]中国科学技术大学安徽省生物质洁净能源重点实验室,合肥230026

出　　处：《太阳能学报》2011年第9期1355-1360,共6页Acta Energiae Solaris Sinica

基　　金：国家科技支撑计划(2007BAD34B02);中科院知识创新方向性项目(KGCX2-YW-330);农业部绿色农业项目(2007-15)

摘　　要：对干玉米秸秆进行了元素分析和组分分析;通过热重分析仪和差示扫描量热仪对不同含湿量的粉末状玉米秸秆进行等温干燥实验,通过对热流曲线积分得到干燥需热量并对其进行定量研究。结果表明:以最大干燥速率为分界点,玉米秸秆干燥过程可分为升速干燥段和降速干燥段;热流曲线与干燥失水过程有明显的对应关系;90℃干燥1kg含湿量20%～40%的湿秸秆需热量在380～620kJ之间;50～110℃干燥含湿量25%秸秆的需热量在210～610kJ之间。Ultimate analysis and component analysis were carried out for corn stalk powder. Isothermal drying experiments and caloric requirement experiments were carried out by thermal analyzer to study the drying mechanism of heat and mass transfer. And then quantitative analysis was studied for drying heat flow. The results showed that taking the maximum drying rate as the threshold, the process of drying could be divided into raising rate stage and falling rate stage. DSC curve and the drying process had a clear correlation. Drying caloric from 380kJ to 620kJ was required for 1kg wet stalk （moisture content 20%-40% ） drying at 90℃, and from 210kJ to 610kJ was required for lkg wet stalk （moisture cntent 25% ） drying at 50 -110℃.

关 键 词：玉米秸秆 等温干燥 干燥机理 差示扫描分析 

分 类 号：S375[农业科学—农产品加工]