CAJ | 학술논문

利用TG-DTG热分析技术研究粒径对煤粉燃烧特性的影响。结果表明：随着煤粉粒径的减小，煤粉着火温度和燃尽温度降低，最大燃烧速率和平均燃烧速率增加，可燃指数和综合燃烧特性指数提高，粒径减小可以有效改善煤粉的燃烧性能；对比粒径对不同煤质燃烧性能的影响发现，减小粒径对无烟煤燃烧性能的改善更具积极意义。利用Coats-Redfern积分法分析了粒径对煤粉燃烧过程的动力学参数的影响，计算结果表明：随着煤粉粒径的减小，煤粉燃烧反应的表观活化能降低，指前因子增加。
이용TG-DTG열분석기술연구립경대매분연소특성적영향。결과표명：수착매분립경적감소，매분착화온도화연진온도강저，최대연소속솔화평균연소속솔증가，가연지수화종합연소특성지수제고，립경감소가이유효개선매분적연소성능；대비립경대불동매질연소성능적영향발현，감소립경대무연매연소성능적개선경구적겁의의。이용Coats-Redfern적분법분석료립경대매분연소과정적동역학삼수적영향，계산결과표명：수착매분립경적감소，매분연소반응적표관활화능강저，지전인자증가。
The thermo gravimetric analysis was used to investigate the influence of particle size on the combustion characteristics of pulverized coal .The results show that with the decrease of particle size of pulverized coal , both ignition and burnout temperature were lower , the maximum burning rate and av-erage burning rate increased , combustible index and combustion characteristics index improved .Com-bustion performance of pulverized coal was improved by reducing coal particle size .Contrast the influ-ences of particle size on combustion performances of different coal properties .It can be found that the decrease of particle size was more meaningful for the improvement of combustion performance of anthra -cite.The Coast-Redfern method was used for analyzing kinetic parameters of coal combustion with different sizes.The results indicated that with coal particle size reduction , apparent activation energy of coal combustion decreased , and the pre-exponential factor increased .