典型干杂类可燃物的热重分析  

Thermogravimetric Analysis of Typical Dried Food Material

作　　者：宗若雯[1,2] 张小芹 李松阳[1,2] 谭家磊[1,4] 支有冉[1,2] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230026 [2]中国科学技术大学苏州研究院,苏州215123 [3]浙江消防总队宁波支队,宁波315300 [4]北京市劳动保护科学研究所,北京100054

出　　处：《燃烧科学与技术》2009年第4期309-315,共7页Journal of Combustion Science and Technology

摘　　要：针对衡阳"11.3"特大火灾事故中典型干杂食品类可燃物进行了不同气氛下热重分析.研究了含水率对热解的影响,分析了空气和氮气气氛下不同的热解过程,并计算了主要步骤的动力学参数.结果表明,干杂食品类可燃物的含水率是分析其热解失重特性的重要因素.木耳在空气条件下的热解特性跟其他典型火灾可燃物生物质热失重特性类似,表现为两步反应机理;八角的热解失重特性则相对复杂,表现出三步热解过程.活化能的计算结果显示木耳、八角与常见生物质可燃物一样,具有类似的热解燃烧性能.这些干杂类可燃物的潜在火灾危险性值得人们关注.A thermogravimetric analysis agaric and aniseed, the typical combustible material which caught fire in Hengyang Merchant＇s building, is made under different atmospheres. The effect of moisture content on thermal degradation is analyzed. Thermal degradation process is investigated under the atmospheres of air and nitrogen, respectively, and thermal kinetics parameters are calculated. Moisture content in dried food is shown to play an important role in thermal degradation. Agaric shows the same characteristics of thermal degradation as other biomass combustible materials in air, with two-stepmechanism. The thermal degradation of aniseed is more complicated, with three-step-mechanism. The calculated results of activation energy indicates that agaric and aniseed have similar potential of thermal degradation and combustion as other biomass materials do, whose underlying fire risk should not be neglected.

关 键 词：干杂类 热重分析 热解动力学 含水率 活化能 

分 类 号：X928.7[环境科学与工程—安全科学]