摘要
采用热重法研究淮南煤泥着火燃烧特性,并与淮南原煤进行比较。利用TG-DTG法确定着火温度和燃尽温度并计算得到燃烧特征参数,同时采用Coats-Redfern积分法进行了动力学分析。结果表明,淮南煤泥着火点比原煤高11℃,燃尽点比原煤高31℃,燃烧特征参数均小于淮南原煤,同时淮南煤泥的活化能E比原煤高139.41k J/mol,说明淮南煤泥难以着火,燃烧反应性能较差。
The combustion kinetics of the Huainan coal slime was investigated by the thermogravimetric analysis and compared with that of the Huainan coal. The ignition temperature and the burn-out temperature as well as combustion characteristics parameters were obtained using TG-DTG analysis. The ignition temperature and the burn-out temperature of Huainan coal slime is 11℃ and 31 ℃ higher than the Huainan coal, respectively. Meanwhile, the combustion characteristics value of Huainan coal slime is smaller than that of the Huainan coal. With the Coat-Redfern analysis, the apparent activation energy of the Huainan coal slime is 139.41 kJ/mol larger than the Huainan coal. The results show that the Huainan coal slime is difficult to be ignited and burnt-out.
引文
[1]黄中,江建忠,徐正泉,等.循环流化床锅炉大比例煤泥掺烧试验研究[J].中国电机工程学报, 2013, S1:112~116.
[2]李宁,雷宏彬,田忠文,等.煤泥资源化利用关键技术研究分析[J].煤炭工程, 2011,(12):100~101, 105.
[3]张建民,李春梅.我国煤泥综合利用现状、问题及建议[J].中国能源, 2010,(10):38~40.
[4]张晓丹.浅析煤泥综合利用电站的发展[J].煤炭工程,2007,(11):25~27.
[5]吕帅,吕国钧,蒋旭光,等.印尼褐煤湿煤末(煤泥)热解和燃烧特性及动力学分析[J].煤炭学报, 2014,(3):554~561.
[6]曹晓哲,赵卫东,刘建忠,等.煤泥水煤浆燃烧特性的热重研究[J].煤炭学报, 2009,(10):1394~1399.
[7]刘明强,刘建忠,王睿坤,等.煤泥燃烧动力学机理研究的新方法探讨[J].煤炭学报, 2012, S2:444~448.
[8]王云雷.煤泥及其混煤的燃烧特性分析[D].中国矿业大学, 2015.
[9]LI Qingzhao, ZHAO Changsui, CHEN Xiaoping, et al. Comparison of pulverizedcoalcombustioninairandinO2/CO2mixturesby thermogravimerricanalysis[J].JournalofAnalyticalandApplied Pyrolysis, 2009, 85(1/2):521~528.
[10]刘建忠,刘明强,赵卫东,等.褐煤半焦燃烧特性的热重试验研究[J].热力发电, 2013,(11):86~92.
[11]CoatsAW,RedfernJP.Kineticparametersfrom thermogravimetricdata[J]. Nature, 1964, 201(4914):68~69.