CAJ | 학술논문

为了节约动力煤,降低电力成本,为锅炉燃烧提供理论指导。采用热重分析法和热差分析法对褐煤和煤矸石的混合物进行热解实验。通过改变实验条件(温升速率)可以得到不同情况下的TG曲线、DSC曲线和转化率曲线。实验选用褐煤和煤矸石的质量比为2∶3,温升速率分别为10、30、50℃/min。10℃/min和50℃/min的煤样总的放热面积相近,但30℃/min的放热面积较小,说明30℃/min的温升速率不利于放热。由动力学分析得知,由于温升速率不同,活化能、频率因子均不同,热解动力学参数均发生一定变化。
위료절약동력매,강저전력성본,위과로연소제공이론지도。채용열중분석법화열차분석법대갈매화매안석적혼합물진행열해실험。통과개변실험조건(온승속솔)가이득도불동정황하적TG곡선、DSC곡선화전화솔곡선。실험선용갈매화매안석적질량비위2∶3,온승속솔분별위10、30、50℃/min。10℃/min화50℃/min적매양총적방열면적상근,단30℃/min적방열면적교소,설명30℃/min적온승속솔불리우방열。유동역학분석득지,유우온승속솔불동,활화능、빈솔인자균불동,열해동역학삼수균발생일정변화。
In order to save steam coal and reduce power cost,and to provide theoretical guidance for the boiler combustion,the pyrolysis test was carried out on lignite and coal gangue using thermogravimetric analysis and different thermal analysis.Get different situations of TG curves,DSC curves and conversion rates curve by changing the heating rate.The mass ratio of lignite to coal gangue is 2 ∶ 3,the heating rate is 10 ℃/min,30 ℃/min,50 ℃/min. The heat releasing areas of the coal sample are close when the heating rate is 10 ℃/min,50℃/min,while the heat releasing area is small when the heating rate is 30℃/min.The results show that,30℃/min is not suitable for heat releasing.The dynamic analysis show that,the activation energy,frequency factor,pyrolysis kinetics parameters change as the heating rate changes.