超细煤粉热解特性及热解反应动力学研究  

Study of Superfine Pulverized Coal Pyrolysis and Thermodynamic Parameters

作　　者：王琳俊[1] 马阳[1] 刘加勋[1] 姜秀民[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《锅炉技术》2015年第6期73-78,共6页Boiler Technology

摘　　要：采用TG-DSC分析方法对内蒙古煤和神华煤两种煤种各4个不同粒径的超细煤粉分别在5℃/min、10℃/min、20℃//min和30℃/min的升温速率下进行热解实验并采集数据分析,研究了不同煤种超细煤粉热解过程中煤粉粒径、升温速率、煤种中组分对热解过程的影响。最后根据Coats-Redfern法建立了动力学模型并计算出了相关系数。结果表明:超细煤粉的热解过程可以分为干燥脱气、半焦形成和熟化成焦(二次脱气)3个失重阶段。Shenhua and Neimenggu superfine pulverized coal which each has samples with 4 different particle diameters were used in the pyrolysis. TG-DSC method was used to collect data in the experiment under 4 different heating rates= 5 ℃/min, 10 ℃/min, 20 ℃/min and 30 ℃/min. Influences of particle diameters, heating rates and coal types were analyzed and researched. Coats-Redfern model was set up to calculate thermodynamic parameters. The results showed that the pyrolysis process could he divided into 3 stages first dry＆ degasification stage, semicoke formation stage and thermal maturation stage （second dry＆ degasification stage）.

关 键 词：超细煤粉 热解 热重分析 SDT 动力学参数 Coats-Redfern法 

分 类 号：TQ530.2[化学工程—煤化学工程]