玉米秸秆燃烧特性及动力学分析

摘要

利用热重分析仪对玉米秸秆进行了不同升温速率下的燃烧特性实验,得到了燃烧特性曲线并且求解了燃烧特性参数.研究结果表明,玉米秸秆的燃烧可以分为三个阶段:水分蒸发、挥发分的析出燃烧、固定碳的燃烧,玉米秸秆具有着火温度低、燃尽率高、燃烧速率大等优点.升温速率的提高不利于生物质的着火和燃尽,但是增大了反应速率.对玉米秸秆的挥发分析出燃烧阶段和固定碳燃烧阶段分别求解了动力学参数,结果表明一级反应动力学模型是可行的.%The combustion experiments of cornstalk were conducted under different heating rates using the thermogravimetric analyzer. Combustion characteristic curves and combustion characteristic parameters were acquired. The research results showed that the combustion process of cornstalk can be broadly separated into three stages: evaporation of water, release and combustion of volatile, combustion of fixed carbon.The cornstalk has a advantage of low ignition, better burnout as well as high combustion rate.lt was observed that the delayed temperature of ignition and burnout and raised reaction rate can be achieved with the addition of heating rate. The result showed feasibility of using first order reaction model to solve the kinetic parameters of cornstalk combustion.