生物质燃烧动力学特性实验研究

Study on kinetic characteristics in combustion process of biomass

采用非等温热重分析法对农作物秸秆燃烧动力学特性进行了研究。提出了秸秆挥发分析出过程的特性参数,建立了反应动力学方程;测算了反映燃烧性能的燃烧特性指数和反映生物质秸秆燃烧放热特性的差热峰面积指标。结果表明:玉米秸秆和小麦秸秆的挥发分初析温度随升温速度的增加而降低,稻秆的挥发分初析温度随升温速度的增加而增加;3种样品的活化能随升温速度的增加而降低;差热峰面积、燃烧特性指数随升温速度的增加而增大。

This paper reports the experimental results on the thermogravimetric characteristic of straw combustion and influence of different experimental conditions upon the thermogravimetric characteristic of straw. The characteristic parameters of straw volatilization separating process are put forwardreaction dynamics equation of straw is established the index of the combustion characteristics and the are of differential apex are tested in the paper. It is suggested that the initial release temperature of corn straw and wheat straw volatilization reduces and the initial release temperature of rice straw volatilization decreases with the increase of the temperature-increasing rate. The activation energy of the three samples weakens with the increase of the temperature-increasing rate.The area of differential apex and the index of the combustion characteristics of straw increases with the increase of the temperature-increasing rate.