摘要
利用热天平和小型煤粉燃烧实验台对无烟煤、贫煤及其三种配比混煤的燃烧特性、不同配风下NOx的生成规律和燃尽特性进行了实验研究。通过对试验数据的整理和分析,认为无烟煤与贫煤在燃烧性能上略有差异,混煤的燃烧特性介于两者之间,合适的选取过量空气系数可实现不同掺烧比无烟煤与贫煤混煤高效低NO燃烧。并针对三种掺烧比的混煤提出了其高效低污染燃烧的过量空气系数范围,为燃用上述混煤的电厂经济清洁运行提供一些参考数据。
By using a thermobalance and a small sized pulverized coal combustion test rig an experimental study was conducted for a multitude of test items. The latter include the combustion characteristics of anthracite, lean coal and the blends of the above two coals in three different proportions, NOx generation mechanism at different combustion air supply rates, and burn out characteristics. Through the processing and analysis of the test data it is concluded that there exists some differente in combustion performance between the anthracite and lean coal with the performance of the blends of these two coals exhibiting intermediate characteristics. A proper selection of excess air factor can lead to a high efficiency combustion of anthracite and lean coal blended in different ratios and to low NOx emissions. With respect to coals being blended in three different ratios a suitable range of excess air factor values is proposed to attain a high efficiency combustion and low pollutant emissions. This may serve as a guide for the cost effective and clean operation of power plants firing the above coal blends.
出处
《热能动力工程》
EI
CAS
CSCD
北大核心
2002年第6期595-598,共4页
Journal of Engineering for Thermal Energy and Power
关键词
无烟煤
贫煤
混煤燃烧
氮氧化合物
排放特性
燃烧特性
燃尽特性
burning of anthracite mixed with lean coal, combustion characteristics, NO emissions, burn out characteristics
