柠条燃烧特性及燃烧动力学研究  

STUDY ON THE COMBUSTION CHARACTERISTICS AND KINETICS OF Caragana korshinskii Kom

作　　者：刘正光[1] 张静[1] Liu Zhengguang Zhang Jing(College of Engineering, Shanxi Agricultural University, Taigu 030801, China)

机构地区：[1]山西农业大学工学院,太谷030801

出　　处：《太阳能学报》2017年第9期2611-2618,共8页Acta Energiae Solaris Sinica

基　　金：科技部"十三五"国家重点研究计划(2016YFD0701800);山西省重点研发计划(农业)(201703D221030-2);山西农业大学博士科研启动项目(2015ZZ09)

摘　　要：应用热分析仪对柠条生物质燃料的燃烧过程进行分析,研究颗粒度、升温速率和风量对燃烧特性与动力学参数的影响。结果表明:(1)颗粒度为0.16 mm试样在升温速率为20 K/min,风量为40 mL/min的工况下,着火温度为221.1℃,最大燃烧速率温度为336.2℃,燃尽温度为559.4℃,最大燃烧速率0.6 mg/min,平均燃烧速率为0.129mg/min,相对于10 K/min和30 K/min升温速率,20 K/min工况下的燃料动力学参数最优,活化能为39.094 kJ/mol,频率因子为2.175×10~7L/min;(2)升温速率的增大会使平均燃烧速率和燃烧特性指数增大,着火温度降低;风量对燃烧速率无影响,但较大风量不利于挥发分析出和燃烧稳定性;颗粒度对挥发分析出有显著影响,颗粒度较大时需较高升温速率和风量才可充分燃烧,而颗粒度较小时即使风量较小也能充分燃烧。Analyzing the combustion process of Caragana biomass fuels by using thermal analyzer, the effect of different particle sizes, heating rate and air volume on the combustion characteristic and kinetic parameters was studied. Results showed that （1） The ignition temperature, maximum burning rate temperature, burnout temperature, maximum burning rate, average burning rate of Caragana biomass fuels are separately as followings 221.1 ℃, 336.2 ℃, 559.4, 0.6 mg/ min and 0.129mg/min, respectively. （2） When the particle size is 0.16 mm, the heating rate is 20 K/min and the ai.175× 10^7 L/min and the combustion kiner volume is 40 mL/min, its activation energy is 39.094 kJ/mol, the frequency factor 2tic equation is obtained. With respect to the heating rate of 10 K/min and 30 K/min, the kinetic parameters of the fuel are optimized at 20 K/min that the activation energy is 39.094 kJ/mol and the frequency factor is 2.175× 10^7 L/min; （3） The increase of heating rate will increase the average burning rate and combustion characteristic index and reduce the ignition temperature. The effect of the air volume on burning rate is not significant. But the larger air volume is not conducive to precipitation of volatile matter and combustion stability. Larger heating rate and air volume are needed for the full combustion of fuel with larger particle size and releasing more heat, while the fuel with smaller particle size does not need.

关 键 词：柠条 热分析 燃烧特性 燃烧动力学 

分 类 号：TK519[动力工程及工程热物理—热能工程]