摘要
利用一种基于煤质参数的新判定方法研究了恒温下混煤的燃烧特性。通过引入煤质判定指数FZ作为煤质参数的综合反映,定义了燃烧判定指数D_1、D_2和S,并将其作为燃烧特性的定量表征,根据两者关系绘制判定指数曲线,寻找不同工况下FZ对D_1、D_2和S的影响规律。通过自制恒温热重实验台,利用新判定方法分析了不同工况下煤质变化对混煤燃烧特性的影响规律,并验证了新判定方法的可靠性。结果表明:FZ能够包含主要煤质参数,D_1、D_2和S能定量表示不同阶段的燃烧特性;当温度或氧气体积分数改变时,曲线D_1、D_2和S斜率能准确反映不同阶段混煤燃烧特性受煤质的影响程度。
A new judgement method was proposed for combustion characteristics of blended coal at constant temperature based on coal properties. By introducing the judgement index Fz as a comprehensive expression of coal properties, and by defining the judgement indexes D1, D2, and S as the quantitative reflection of combustion characteristics, a judgement curve was drawn, based on which, the effects of Fz on D1 , D2, and S were studied under different working conditions. With the help of a self-developed thermogravimetric analyzer, and by the new judgement method, the influence law of coal quality on the combustion characteristics has been analyzed under different conditions, during which the reliability of the new judgement method is proved to be effective. Results show that Fz covers the parameters of main coal properties, while D,1 D2, and S successfully express the combustion characteristics in different stages. With the variation of temperature and oxygen concentration, the slope of D1, D2, and S curves can accurately reflect the effect degree of coal properties on the combustion characteristics.
作者
岳爽
王春波
司桐
李一鹏
王子铭
YUE Shuang;WANG Chunbo;SI Tong;LI Yipeng;WANG Ziming(School of Energy, Power and Mechanical Power University, Baoding 071003, Engineering, North China Electric Hebei Province, China)
出处
《动力工程学报》
CAS
CSCD
北大核心
2018年第5期353-359,365,共8页
Journal of Chinese Society of Power Engineering
基金
国家重点研发计划资助项目(2016YFB0600701)
关键词
煤质
燃烧特性
恒温
判定方法
coal property
combustion characteristics
constant temperature
iudgement method
