秸秆与油泥混合成型燃料燃烧过程及动力学研究

为探究农业生物质燃烧性能，以油泥与3种秸秆（玉米秸秆、豆秆、麦秆）为试验原料进行等温燃烧试验，对混合成型燃料的燃烧特性进行了研究，并对反应动力学进行分析。结果表明，随着温度的升高3种混合成型燃料的燃烧最大峰值提前，燃尽时间明显缩短，最大失重速率增加，但燃烧失重率最后基本保持一致。3种混合成型燃料在750~950℃温度下等温燃烧过程的反应级数分别为1.2~1.4、0.9~1.1和1.0~1.2，活化能分别为55~57、50~53和49~55 kJ/mol，指前因子分别为57~113、35~74和76~103 s^-1。3种混合成型燃料的燃烧过程遵循燃烧动力学基本方程的规律，并可用一级反应来描述，秸秆种类对混合成型燃料燃烧性能影响不显著。

Combustion and Kinetics of Straw and Sludge Briquette Fuel

In order to explore the combustion performance of agricultural biomass, three kinds of briquette fuels of sludge and straws (corn stalk, bean stalk, wheat straw) were used as experimental materials for isothermal combustion experiment, the combustion characteristics of briquette fuels were studied and analyzed. And the reaction kinetics were analyzed. The results showed that with the increase of temperature, the maximum peaks of combustion of 3 briquette fuels were advanced, the burn-off times decreased significantly and the maximum weight loss rates increased, but the burning weight loss curves were consistent at last. The reaction orders of the isothermal reaction processes of 3 briquette fuels at the temperature of 750-950℃ were 1.2-1.4, 0.9-1.1 and 1.0-1.2, respectively, the activation energies were 55-57, 50-53 and 49-55 kJ/mol, and the frequency factors were 57-113, 35-74 and 76-103 s^-1. The combustion of 3 briquette fuels followed the essential dynamic equation of combustion and could be described by first order reaction. The straw type had no significant influence on the combustion performance of blended briquette.