板材类生物质燃烧及动力学特性热重研究  

Thermogravimetric study on combustion and kinetic characteristics of artificial-plates

作　　者：蒲舸[1] 雷强[1] 徐鹏[1] 

机构地区：[1]重庆大学动力工程学院低品位能源利用技术及系统教育部重点实验室,重庆400030

出　　处：《环境工程学报》2012年第7期2431-2436,共6页Chinese Journal of Environmental Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(CDJZR10140001)

摘　　要：采用非等温升温法研究了4种板材类生物质在空气气氛下的燃烧特性和动力学特性。通过对TG、DTG等曲线的分析,发现4种板材燃烧过程均可分成3个阶段,即水分蒸发阶段、挥发份析出(或燃烧)阶段和固定碳燃烧阶段。综合燃烧特性:松木集成材>纤维密度板>夹芯胶合板>刨花板。4种板材均具有良好的燃烧特性。4种生物质燃烧均存在1个吸热峰和2个放热峰,分别与挥发分析出峰、挥发分燃烧、固定碳燃烧对应。采用Fridman法和Fridman-Carroll法分别对4种板材的动力学参数进行了计算,2种方法得出的结果符合较好。分析得出:由于生物质燃烧与环境换热、挥发分析出吸热、固定碳燃烧放热等因素作用,4种生物质的表观活化能高温区均低于低温区。动力学计算结果表明:松木集成材平均表观活化能最低,燃烧反应能较容易进行。Combustion and kinetic characteristics of four kinds of artificial plates in air atmosphere were in- vetigated using non-isothermal heating method. According to the analysis on TG/DTG curves, it is shown that the combustion procedures of artificial plates can be divided into three stages, i.e. dehydration, volatile matter re- leasing（ or combustion） and fixed carbon combustion. And synthesized combustion characteristic indexes follow the order： pine glulam（PG） 〉 fiber board （FB） 〉 core board （CB） 〉 particle board （PB）. All the four plates have excellent combustion qualities. One endothermic peak and two exothermic peaks are observed in procedure of artificial-plate biomass combustion, which correspond to volatile matter releasing peak, volatile matter combus- tion and fixed-carbon combustion, respectively. In addition, consistent kinetic parameter of these four kinds of artificial plates are obtained applying Fridman method and Fridman-Carroll method. It is concluded that, for the reason of heat exchange, endothermic characteristic of volatile matter releasing and exothermic characteristic of fixed-carbon combustion, the apparent activation energy of these four biomass in high-temperature zone are lower than that in low-temperature zone. The calculation puts that average activation energy of PG is the lowest, which indicating an easy trend of combustion.

关 键 词：板材类生物质 热重 微分热重 燃烧特性 动力学特性 

分 类 号：TK62[动力工程及工程热物理—生物能]