基于失重曲线的煤颗粒热解传热传质计算  

Heat and mass transfer of coal particles pyrolysis based on weight loss curve

作　　者：张旭辉[1,2] 陈赞歌 吴鹏[1,2] 滕济林[1,2] 张培林[1,2] ZHANG Xuhui;CHEN Zan＇ge;WU Peng;TENG Jilin;ZHANG Peilin(NARI Group Corporation （State Grid Electric Power Research Institute） ,Nanjing 211000, China;Beijing Guodian Futong Science and Technology Development Co. , Ltd. ,Beijing 100070, China)

机构地区：[1]南瑞集团公司(国网电力科学研究院),江苏南京211000 [2]北京国电富通科技发展有限责任公司,北京100070

出　　处：《洁净煤技术》2017年第6期42-46,50,共6页Clean Coal Technology

基　　金：国家重点研发计划资助项目(2016YFB0600400)

摘　　要：为提高煤颗粒热解传热传质模型的适用性和精确性,采用煤的热失重曲线替代分布活化能模型建模,结合热传导方程和质量守恒方程描述煤颗粒的传热传质过程,通过自制的煤颗粒热解失重测试平台进行验证。结果表明:4、8、12 mm长焰煤在900℃和载气流速0.06 m/s时,挥发分析出量预测结果的平均相对误差分别为6.21%、5.11%、4.92%;4 mm长焰煤在载气流速0.06 m/s,环境温度分别为900、750、650℃时,挥发分析出量预测结果的平均相对误差分别为6.21%、5.54%、5.20%。To improve the applicability and accuracy of heat and mass transfer model, the coal pyrolysis model was built based on the ther- mal weight loss curve to replace the DEAM model. The heat and mass transfer process of coal particles were described by equation of heat conduction and mass conservation, the model was validated by the testing pyrolysis weight loss platform of coal particle. The results show that the average relative deviations of the exhalation of 4 nm,8 mm,12 mm coal volatile are 6.21% ,5.11% ,4.92% respectively under the condition of ambient temperature 900 ℃ and the flow velocity of carry gas 0.06 m/s. The average relative deviations of the exhalation of 4 mm coal volatile are 6.21% ,5.54% ,5.20% ,under the condition of ambient temperature 900,750,650 ℃ and flow velocity of carry gas 0.06 m/s.

关 键 词：煤热解 传热传质 失重曲线 挥发分 

分 类 号：TQ530.2[化学工程—煤化学工程]