摘要
以玉米秸秆和煤粉为原料,在不同原料配比,不同升温速率下,利用热重分析仪在模拟锅炉气氛下进行燃烧实验,采用Flynn-Wall-Ozawa法建立动力学模型,研究模拟锅炉气氛下玉米秸秆及其混煤燃烧的燃烧特性及其动力学,对比相同实验条件空气气氛下的燃烧工况结果表明,燃料的综合燃烧特性指数SN随升温速率的增大而成倍增长,因掺入煤粉的比例加倍而减半;随着掺混煤比例的增大,失重速率(DTG)曲线上固定碳燃烧阶段逐渐分化为2个失重峰,模拟锅炉气氛下分化现象更为明显;煤粉的掺入会使燃烧过程所需表观活化能波动增大。
The TG-DTG thermal analysis technology is applied to simulate the combustion characteristics of corn stover and pulverized coal in boiler atmosphere at different heating rates. The Flynn-Wall-Ozawa method used to establish a dynamic model,researched the combustion characteristics and kinetics of corn stover and its blended coal combustion under simulated boiler atmosphere. The combustion conditions under the same experimental conditions were compared with the air condition. The results show that the comprehensive combustion characteristic index S_N doubles with the heating rate,and is halved as the proportion of pulverized coal is doubled. As the proportion of blended coal increases,the fixed carbon combustion stage on the DTG curve gradually splts into two weight loss peaks,and the degree of division in the simulated boiler atmosphere is more obvious. The incorporation of pulverized coal will increase the apparent activation energy fluctuation required in the combustion process.
作者
朱成成
邢献军
陈泽宇
糜梦星
张学飞
Zhu Chengcheng;Xing Xianjun;Chen Zeyu;Mi Mengxing;Zhang Xuefei(School of Automobile and Transportation Engineering,Hefei University of Technology,Hefei 230009,China;Institute of Advanced Energy Technology&Equipment,Hefei University of Technology,Hefei 230009,China;Intelligent Manufacturing Institute,Hefei University of Technology,Hefei 230009,China;School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China)
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2021年第1期385-391,共7页
Acta Energiae Solaris Sinica
基金
国家科技支撑计划(2012BAD30B01)。
关键词
燃烧
热重分析
动力学
玉米秸秆
锅炉气氛
combustion
thermogravimetric analysis
kinetics
corn stover
boiler atmosphere
