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Combustion Characteristics and Kinetic Analysis of Blended Coals of Bituminous Coal and Anthracite
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Author: Hengchao Han, Jingfu Wang, Shizhi Ma, Tao Zhang
Abstract: In this paper, the combustion characteristics and kinetic parameters of bituminous coal and anthracite blended coals at different ratios were analyzed on a high temperature thermogravimetric analyzer. The combustion characteristic parameters such as ignition temperature, burnout temperature and comprehensive combustion characteristic index of blended coals with different blending ratios are analyzed. The reaction kinetics is calculated and analyzed. The experimental results show that with the proportion of anthracite to bituminous coal is increasing, TG and DTG curves moved to high temperature region, There are two peaks in the DTG curve of mixed coals with different mixing ratio,mixed coal ignition temperature and burnout temperature increased gradually, mixed coal at high temperature the activation energy is always higher than that of low temperature, it indicates that volatile branch will be released at low temperature and release a large amount of heat, which will improve the combustion environment of fixed carbon and promote the combustion of fixed carbon. Bituminous coal and anthracite blended coals have better combustion performance and performance at low temperature.
Keywords: Blended Coal, Ratio, Combustion Characteristics, Kinetic Parameters
References:
[1] 高正阳,方立军, 周健等。 混煤燃烧特性的热重试验研究[J]. 动力工程, 2002, 22(3):1764-1767
[2] GAO Zhengyang, FANG Lijun, ZHOU Jian, et al. Thermogravimetric study on combustion characteristics of Blended Coals [J]. Power Engineering, 2002, 22(3):1764-1767
[3] Artos V, Scaroni AW. Fuel, 1993,72(7):927-933
[4] SHEN Guo-dong,WANG Zhi-qi,et al. Combustion characteristics of low-rank coal chars in O2/CO2,O2/N2 and O2/Ar by TGA. Journal of Fuel Chemistry and Technology[J].2016,44(9):1066-1073
[5] Jeffrey J.Murphy, Christopher R. Shaddix. Combustion kinetics of coal chars in oxygen-enriched environments. Combustion and Flame[J].2006(144):710-729
[6] 聂其红, 孙绍增, 李争起, 等. 褐煤混煤燃烧特性的热重分析法研究[J]. 热能动力工程, 2003, 18(6): 561-563.
[7] NIE Qihong, SUN Shaozeng, LI Zhengqi, et al. Study on combustion characteristics of lignite blended coals by thermogravimetric analysis[J]. Journal of Combustion Science and Technology, 2003, 18(6): 561-563.
[8] 李永波. 配比及粒径对煤粉燃烬特性影响的实验研究[D]. 华中科技大学,2009
[9] LI Yongbo. Experimental study on the influence of mixture ratio and particle size on the burnout characteristics of pulverized coal.[D]. Huazhong University of Science and Technology,2009
[10] Yunfei Yan, Zhien Zhang, Lei Zhang et al. Influence of Coal Properties on the Co-combustion Characteristics of Low-grade Coal and City Mud. GlobalNEST International Journal[J]. 2014, 16(2):330-339
[11] LW Wang ,N Karimi ,MC Paul. Numerical study of single coal particle combustion in O2/N2 and O2/CO2 atmospheres. HEFAT 2016,Malaga,Spain,11-13 Jul 2016.
[12] 李永波. 配比及粒径对煤粉燃烬特性影响的实验研究[D]. 华中科技大学. 2009
[13] Li Yongbo. Experimental study on the influence of proportioning and particle size on burnout characteristics of pulverized coal [D].Huazhong University of Science and Technology. 2009
[14] S.J.Wang, F Wu, G Zhang et al. Research on the combustion characteristics of anthracite and blended coal with composite catalysts. Jour nal of the Energy Institute[J]. 2014,(87) :96–101
[15] SC Wang,J Yao,GG Hu. Distribution of apparent activation energy and apparent pre exponential factor of Chinese power coals from TGA method. Meitan Xuebao/journal of the China Coal Society[J]. 2013,38 (6) :1078-1083
[16] Nozomu Sonoyama, Jun-ichiro Hayashi. Characterisation of coal and biomass based on kinetic parameter distributions for pyrolysis. Fuel[J]. 2013,(114): 206–215
[17] Jeffrey J.Murphy, Christopher R. Shaddix. Combustion kinetics of coal chars in oxygen-enriched environments. Combus tion and Flame[J].2006(144):710-729
[18] R. Ebrahimi-Kahrizsangi,M. H. Abbasi. Evaluation of reliability of Coats-Redfern method for kinetic analysis of non-isothermal TGA. Trans.Noferrous Met.Soc.China[J]. 2008,(18):217-221
[19] Coasts A W, Redfern J P. Kinetic Parameters form thermo-gravimetric data[J]. Nature,1964,201(1)
[20] Wu Haibo, Dong Shouhua, Li Donghui et al. Experimental study on dynamic elastic parameters of coal samples. International Journal of Mining Sci ence and Technology[J]. 2015,(25) :447–452
[21] Terry Wall, Yinghui Liu, Chris Spero et al. An overview on oxyfuel coal combustion—State of the art research and technology development[J]. Chemical Engineering Research and Design.2009,8:1003-1016
[22] Kizgut S, Kobayashi N,Hasatani M. CO2,NOX and SO2 emissions form the combustion of coal with high oxygen concentration gases[J]. Fuel,2000,79:1925-32
[23] 岑可法. 高等燃烧学[M]. 浙江大学出版社. 2002
[24] Cen Kefa. Advanced combustion [M]. Zhejiang University Press. 2002
[25] 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,2013,42(11):86-92
[26] Liu Jianzhong, Liu Mingqiang, Zhao Weidong et al. Thermogravimetric study on combustion characteristics of lignite char [J].