松枝与浮选尾煤共热解协同效应及动力学分析  

Analysis on synergistic effect and kinetics of co-pyrolysis of floatation tailings and pine

作　　者：李玉环[1] 赵洪宇[2] 柳树成 宋强[2] 梁新星[2,4] 杜新玉 舒新前[2] 

机构地区：[1]内蒙古工业大学能源与动力工程学院,内蒙古呼和浩特010051 [2]中国矿业大学(北京)化学与环境工程学院,北京100083 [3]北京德天御投资管理有限责任公司,北京100020 [4]新疆北大青鸟哈密煤化工有限公司,新疆哈密839000

出　　处：《煤炭工程》2016年第8期117-120,共4页Coal Engineering

基　　金：国家自然科学基金项目(51074170);新疆富油低阶粉煤热解提质技术及装备开发(201532108);国土资源部煤炭资源勘查与综合利用重点实验室资助开放研究课题(KF2015-3)

摘　　要：为研究松枝与浮选尾煤共热解协同效应及动力学参数,采用热分析天平研究了松枝不同添加比例与浮选尾煤共热解协同效应,并在此基础上计算分析了松枝不同添加比例下与浮选尾煤共热解的N级（n=1,2,3）热解反应模型。实验结果表明：松枝与浮选尾煤单独热解规律不同,松枝的最大热解失重速率大于浮选尾煤。当热解终温为900℃时,松枝和浮选尾煤失重率分别为7433%和1325%,二者主要热解阶段的温度范围有相互重叠部分,有存在发生相互协同效应的可能性。当松枝添加比例在20%~80%时,反应级数n=2时松枝不同添加比例与浮选尾煤共热解动力学方程拟合度较好,且共热解过程中所需活化能要低于浮选尾煤和松枝单独热解时所需活化能,有利于共热解反应的进行,进而导致挥发分更易析出。In order to explore the synergistic effect and kinetics of co-pyrolysis of floatation tailings and pine. By means of thermogravimetric analyzer （TGA） , the characteristics of co-pyrolysis of floatation tailings and different proportions of pine were studied, and the N（N= 1, 2, 3） level kinetics model were analyzed and calculated for co-pyrolysis of floatation tailings and different proportions of pine. The results suggested that the pyrolysis rule of pine was different from floatation tailings, and the maximum weight loss rate of pine was higher than floatation tailings. When the final pyrolysis temperature at 900~C, the weight loss of pine and floatation tailings was 74. 33% and 13.25%, respectively. The temperature range of the main pyrolysis stage of the two main parts of each other was overlap, but the possibility of the occurrence of mutual synergy was big. When the proportion of pine in 20% - 80%, the kinetics equation of pine and floatation tailings co - pyrolysis with a good fitting. The activation energy of pine and floatation tailings co-pyrolysis was lower than the pyrolysis of floatation tailings and pine alone. This is good for the co-pyrolysis reaction, which leads to more release of volatile matter.

关 键 词：松枝 浮选尾煤 共热解 热解特性 动力学 

分 类 号：TQ530.2[化学工程—煤化学工程]