广东地区生物质成型燃料燃烧动力学特性研究  

Combustion Kinetic Characteristics Study of Biomass Briquette in Guangdong

作　　者：熊义 楼波 王小聪 倪进飞 马括 李茂东 

机构地区：[1]华南大学电力学院 [2]广州特种承压设备检测研究院

出　　处：《电站系统工程》2016年第1期5-8,共4页Power System Engineering

基　　金：广东省质量技术监督局科技项目(HT13050327);广东省能源高效清洁利用重点实验室(KLB10004)资助

摘　　要：采用德国NETZSCH STA409PC同步热分析仪对广东地区生物质成型燃料分别在20 K/min、30 K/min和40 K/min的升温速率下进行了热重动力学实验,实验从室温升至终止温度1273 K,并由热重实验数据计算可燃特性指数、燃烧特性指数等特征参数和动力学参数,分析升温速率对其燃烧特性的影响。计算结果表明,随着升温速率的提高,最大失重速率点向高温一侧偏移,最大失重速率升高,可燃特性指数、燃烧特性指数和燃尽特性指数都随之升高。热解燃烧阶段反应级数较大,为1.32~1.45,焦炭燃烧阶段较小,为0.91~1.15,且该阶段反应级数随升温速率的提高有一个减小的趋势。热解燃烧阶段活化能低于焦炭燃烧阶段,且随升温速率变化不明显,分别为88.32~103.80 k J/mol和101.31~123.72 k J/mol。对比其他生物质燃料,其反应级数较高。The TGA experiments of biomass briquette was carried out at heating rates of 20K/min, 30K/min and 40K/rain with a simultaneous thermal analyzer NETZSCH STA409PC, raised fxom an initial temperature of 313K to a final temperature of 1273K. The biomass briquette combustion characteristic parameters such as combustible characteristics index, combustion characteristics index and kinetic parameters were calculated by thermogravimetric data, and the effects of heating rate on the biomass briquette combustion characteristics were analyzed. The results showed that with the increase of heating rate, the maximum weight loss rate point moved to the higher temperature side, the maximum weight loss rate increased, combustion characteristics index increased as well as combustible characteristics index and burnout characteristics index, in favor of ignition and burn-out of biomass briquette. Reaction order of the pyrolysis zone is higher, it is 1.32-1.45; Reaction order of the char combustion zone is lower, it is 0.91~1.15, and it would decrease in the zone. Activation energy of the pyrolysis zone is less than that of the char combustion zone and they didn＇t changed obviously, they are 88.32~103.80 kJ/mol and 101.31-123.72 kJ/mol, respectively. Compared to other biomass fuels, the reaction order of this kind ofbiomass briquette is higher and activation energy of the char combustion zone is higher.

关 键 词：成型燃料 热重分析 升温速率 动力学参数 

分 类 号：TK16[动力工程及工程热物理—热能工程]