锡林浩特褐煤热解特性热重分析与DAEM模型分析  

Lignite Pyrolysis Characteristics of Thermogravimetric Analysis and DAEM Model Analysis

作　　者：李成俊[1] 姜皓 赵炬明[3] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [2]阳江核电有限公司技术部,广东阳江529941 [3]东北电力设计院国际分公司,吉林长春130021

出　　处：《节能技术》2015年第1期69-71,共3页Energy Conservation Technology

摘　　要：采用热重分析法对锡林浩特相同粒度褐煤煤粉热解特性进行了热分析研究。根据实验数据,计算了燃烧反应速度峰值所对应的温度。褐煤粒度相同时,升温速率对最大重量损失速率的影响很大,随着升温速率的增加,TG曲线明显出现陡度减小,最大重量损失速率增大,并且峰值温度有增加的趋势,挥发分析出明显提前,热解结束时间也明显提前,即热解反应更加容易发生;DTG峰值向高温区偏移。从实验数据得到煤热解的活化能分布值显示,锡林浩特褐煤活化能随着失重率的升高而增大,活化能处于230~500 k J/mol范围。Thermogravimetric analysis of same size lignite coal pyrolysis characteristics for the study of thermal analysis. According to the experimental data, calculating the combustion peak temperature of the reaction rate. When lignite particle phase is same, the effects of heating rate on the maximum weight loss rate is very big, with the increase of heating rate, apparently in the TG curve gradient decreases, and maximum weight loss rate, and the peak temperature tends to increase, volatile analysis is in advance, clear out pyrolysis end time also significantly ahead time; DTG peak to the high temperature deviation. From the distribution of the activation energy of coal pyrolysis experimental data values Lignite activation energy increases with the rising of weightlessness rate, activation energy in 230 ~ 500 kJ/mol.

关 键 词：褐煤 热解 热重分析 DAEM模型 

分 类 号：TK16[动力工程及工程热物理—热能工程]