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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。
The combustion process of Caragana korshinskii biomass fuel was analyzed by thermal analyzer, and the effects of particle size, heating rate and air volume on combustion characteristics and kinetic parameters were studied. The results show that: (1) The ignition temperature is 221.1 ℃, the maximum burning rate is 336.2 ℃, the burning temperature is 0.16 ℃ when the temperature is 20 K / min and the air volume is 40 mL / min. Was 559.4 ℃, the maximum burning rate was 0.6 mg / min and the average burning rate was 0.129 mg / min. The fuel kinetics parameters were the best at 20 K / min under 10 K / min and 30 K / min heating rate, The activation energy is 39.094 kJ / mol, and the frequency factor is 2.175 × 10 ~ 7L / min. (2) The increase of heating rate will increase the average burning rate and combustion characteristic index and reduce the ignition temperature. The air volume has no effect on the burning rate, Larger air volume is not conducive to volatile analysis and combustion stability; Particle size has a significant impact on the volatile analysis, the higher the particle size, the higher heating rate and air volume can be fully burned, and smaller particle size, even if the air volume is small Can be fully burned.