城市污泥与煤混合热解特性及动力学分析  

Thermogravimetric characteristics and kinetic analysis of co-pyrolysis of sewage sludge and coal

作　　者：常风民[1,2] 王启宝[1] 王凯军[2] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]清华大学环境学院环境模拟与污染控制国家重点联合实验室,北京100084

出　　处：《环境工程学报》2015年第5期2412-2418,共7页Chinese Journal of Environmental Engineering

基　　金：国家"水体污染控制与治理"科技重大专项(2012ZX07205-002)

摘　　要：为了污泥与煤混合热解的实验研究及工程化应用提供初步的数据及理论支持,利用热重分析仪讨论了污泥与煤混合热解的主要影响因素(加热速率、热解终温及混合比例)以及动力学参数。结果表明:加热速率对污泥热解影响较小;混合物热解终温与煤的热解终温基本一致;煤在污泥(干基)中的添加比例小于50%有利于挥发分的产出;通过热解特性及动力学参数分析,得出混合物比单一物料更易分解,且两者存在一定的协同效应;建立了污泥与煤不同混合比例在有机质主要热解区间内的经验动力学方程,经具体混合比例验证,经验动力学方程推导出的动力学参数及TG曲线与实际实验结果吻合较好。Co-pyrolysis of sewage sludge and coal was investigated using a thermogravimetric analyser,in terms of its thermogravimetric characteristics and kinetic parameters. The results showed that the heating rate had little influence on sewage sludge pyrolysis. The final temperature of sludge / coal co-pyrolysis should coincide with coal. It was also found that less than 50% coal addition could increase the yield of volatile components. The mixture of sewage sludge and coal was decomposed more easily than single substance and an obvious synergistic effect was observed during the sludge / coal co-pyrolysis. Besides,empirical kinetic equations for sludge / coal copyrolysis with different mixture ratios were established and verified at main pyrolysis temperature regions. A reasonable fit to the experimental data was obtained for both kinetic parameters and TG curves. Results from this comprehensive investigation will provide theoretical support for further research and engineering application of sludge / coal co-pyrolysis in the future.

关 键 词：污泥 煤 共热解 动力学 经验方程 

分 类 号：X703[环境科学与工程—环境工程]