摘要
采用木屑、谷壳和污泥3种生物质作为再燃燃料,在一台93 kW单角炉上进行了再燃还原燃煤烟气中NO的实验,研究了不同工况条件下炉内关键气体组分的分布情况。结果表明:生物质再燃工况下炉内形成了贫氧的还原性区域,该区域内NO浓度明显低于无再燃的基本工况;炉内还原性区域长度及NO浓度降低程度与再燃燃料种类、再燃燃料量及再燃燃料载气有关;与基本工况相比,再燃工况下炉内CH_4、HCN及NH_3浓度显著提高,表现出了与NO浓度分布极强的相关性,表明这些气体组分在生物质再燃脱硝过程中起重要作用。
The experimental studies on reburning for NO reduction in coal-fired flue gas were performed in a 93 kW single-burner furnace,using three kinds of biomasses sawdust,rice husk and sludge as reburn fuels.The distributions of some key gaseous compositions in the furnace were measured and analyzed under different conditions.The results showed that an oxygen-lean reductive zone was formed under the biomass reburning condition,in which NO concentration was quite lower than the basic condition without reburning.The length of the reductive zone and the extent of NO reduction were related to reburn fuel type,reburn fuel amount and reburn fuel carrier gas.Compared with the basic condition without reburning,the concentrations of CH_4,HCN and NH_3 increased significantly under the biomass reburning condition,which showed an obvious relationship with the distribution of NO, it indicated that these gaseous compositions played a crucial role in the reduction of nitrogen oxides.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2011年第6期1061-1064,共4页
Journal of Engineering Thermophysics
基金
国家自然科学基金(No.50806025
No.51021065)
中央高校基本科研业务费资助(No.HUST:2010QN023)
湖北省自然科学基金(No.2009CDB409)
关键词
生物质
再燃
单角炉
NO
biomass
reburning
single-burner furnace
NO
