摘要
电站锅炉煤粉燃烧过程中,煤粉着火前期的升温速率可达104 K/s。而且煤粉在着火前期的升温状态直接影响到煤粉挥发份的释放速度和挥发份成分,进而影响到煤粉颗粒的着火和燃烧。该文针对煤颗粒快速升温过程中非傅立叶导热效应,利用热波模型和D-P-L模型对快速升温过程中煤颗粒的温度场进行的数值模拟,与实测结果进行了比较。并发现对于电站锅炉所燃用煤粉的粒径范围,在煤粉着火前的升温过程中考虑非傅立叶导热效应是十分必要的。
For coal-fired utility boiler combustion, the temperature rising rate of the coal particle can reach 104K/s. The temperature rising rate and the peak temperature of coal particle directly determine the devolatilizing process and the composition of the volatile. Taking the Non-Fourier heat diffusion effect into account, the temperature histories of coal particles under rapid heating condition are simulated with the help of the CV model and D-L-P model. The simulation results are compared with measured temperature, from which we find that for utility boiler combustion, it is necessary to take the non-Fourier heat diffusion effect into account.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2002年第9期141-145,共5页
Proceedings of the CSEE
基金
高等学校骨干教师资助计划项目。
