油页岩干馏残渣和稻草混烧动力学解析

Kinetic and Numerical Simulation Analysis of Co-firing of Oil Shale Retorting Residue and Rice Straws

基于Pyris-1 TGA分析仪,开展了桦甸油页岩干馏残渣和稻草混烧试验研究,建立了分布活化能模型(DAEM法),研究混合物混烧动力学反应机理。结果表明,基于TG-DTG曲线,随着稻草掺入,DTG曲线呈现向低温区迁移的趋势,并且低温段曲线峰值高,挥发分释放剧烈,改善了干馏残渣燃烧特性。应用DAEM模型,解析了混合物燃烧动力学。结果表明,随着反应进行,活化能呈上升趋势,与TG-DTG曲线变化规律一致。

Based on Pyris-1 TGA thermogravimetric analyzer, a series of combustion experiments for Huadian oil shale retorting residue, rice straws as well as their blend, was conducted. The kinetics reaction mechanism of co-firing of the blend is studied by distributed activation energy model （DAEM）. The results show that based on the TG-DTG curves of blends, with the mixing ratio of rice straw rising, DTG curves present a tendency to the movement of the low-temperature stage. Moreover, the curve peak of the low-temperature becomes much longer, and the volatile release becomes more intense. The analysis illustrates that the co-firing characteristics of blend was improved. Distributed activation energy model is applied to analyze co-firing kinetics of the blends. The results show that activation energy presents a rising tendency during the impelling of reaction, which is unanimous to the change law ofTG - DTG curves.