The combustion process of pulverized coal was investigated by non-isothermic integral thermogravimetry. The thermogravimetry curves were fitted by the Coats-Redferm approximation function, and kinetic parameters and characteristic temperatures were obtained. The optimal mixing ratio and particle size can be ascertained. The characteristic temperature of pulverized coal can be obtained from the thermogravimetry curve, and the combustion of coal can be divided into homogeneous and heterogeneous combustion according to the differential thermal analysis curve. The activation energy of a single type of coal ranking from low to high is as follows： bituminous coal, meager-lean coal, and anthracite. In the first mixing method, with more low-price meager-lean coal B replacing high price anthracite A, the activation energy slightly decreases; with more bituminous coal replacing meager-lean coal, total tendency makes a declining of activation. In the later mixing method, with an increase in particle size, a declining activation energy can be seen in total tendency.
参考文献
| [1] | 徐万仁,吴铿,张龙来,赵勇,张飞.高炉大喷煤时煤粉利用率的研究[J].钢铁,2006(04):10-14. |
| [2] | 张飞,吴铿,朱锦明,熊国兰,张吉刚,张星洪.高炉炉尘中含碳物质来源[J].北京科技大学学报,2006(06):559-565. |
| [3] | Ichida M;Orimoto T;Tanaka T et al.Behavior of Pulverized Coal Ash and Physical Property of Dripping Slag Under High Pulverized Coal Injection Operation[J].ISIJ International,2001,41(02):325. |
| [4] | 张寿荣,毕学工.关于大量喷煤高炉的某些理论问题的思考[J].钢铁,2004(02):8-13,42. |
| [5] | Warne SSJ. .THERMAL ANALYSIS AND COAL ASSESSMENT - AN OVERVIEW WITH NEW DEVELOPMENTS[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,1996(0):1-9. |
| [6] | 张卉,郭占成,王志,许德平.综合热分析法研究催化剂对煤粉燃烧过程的影响[J].过程工程学报,2007(06):1154-1158. |
| [7] | 张曦东,张建良,陈杉杉,吕卫.利用热重法研究混煤的燃烧率[J].冶金能源,2008(03):33-35. |
| [8] | XU Wan-ren;DU He-gui .Influence of Macerals on the Combustion Characteristics of Pulverized Coal Injection Into BF[J].Bao-Steel Technology,1998,5:30. |
| [9] | XU Wan-ren;DU He-gui .Influence of Pulverized Coal Character on the Mierostrueture and Combustion Speciality of Char Particles[J].Journal of Iron and Steel Research,1994,6(03) |
| [10] | W. Kalkreuth;A.G. Borrego;D. Alvarez .Exploring the possibilities of using Brazilian subbituminous coals for blast furnace pulverized fuel injection[J].Fuel,2005(6):763-772. |
| [11] | ZHOU Jing;ZHOU Zhi jie;GONG Xin et al.Study of Char CO2 Gasification( I )by Isothermal Thermogravimetry[J].Coal Conversion,2002,25(04):66. |
| [12] | ZHOU Jing;GONG Xin;YU Zhun-hong .A Study of Char- CO2 Gasification Part(II)by Temperature-Programmed Thermogravimetry[J].Coal Conversion,2003,26(01):78. |
| [13] | GU Jing;LI Li;WU Shi-yong et al.Measurement of CO2 Gasification Reactivity for High Temperature Pyrolyzed Coal Chars by Tempertature-Programmed Thermogravimetry[J].Journal of East China University of Science and Technology(Natural Science Edition),2007,33:354. |
| [14] | Starink MJ. .The determination of activation energy from linear heating rate experiments: a comparison of the accuracy of isoconversion methods[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,2003(1/2):163-176. |
| [15] | S. Su;J.H. Pohl;J.A. Hart .Techniques to determine ignition, flame stability and burnout of blended coals in p.f. power station boilers[J].Progress in energy and combustion science,2001(1):75-98. |
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