کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6636463 | 461134 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The influence of air distribution on gas-fired coal preheating method for NO emissions reduction
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: The influence of air distribution on gas-fired coal preheating method for NO emissions reduction The influence of air distribution on gas-fired coal preheating method for NO emissions reduction](/preview/png/6636463.png)
چکیده انگلیسی
A gas-fired coal preheating (GFCP) method was investigated on a 35Â kW drop tube furnace with different air distributions, and three coals of various rank were used in the experiments. The results of this investigation show the GFCP provides a flexible means to control NOx emissions for various coals, which can be used with traditional air staging like close-coupled over fire air (CCOFA), separated over fire air (SOFA) as well as MILD. The principle is that GFCP promotes substantial nitrogen intermediates (HCN and NH3) and soot to be generated in the preheating chamber. With proper air distribution, the former convert into N2 and the later function as reductant to destroy newly formed NO in the subsequent furnace. The global denitrification effect is more remarkable for coals of lower rank. While a primary air ratio at intermediate level may obtain the lowest NO emissions for combustion without GFCP, the NO emissions are essentially independent of variations in primary air ratio when GFCP is adopted. Our experiments also find that GFCP reduces fly-ash level by extending residence time for particles traversing high temperature zones.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 139, 1 January 2015, Pages 206-212
Journal: Fuel - Volume 139, 1 January 2015, Pages 206-212
نویسندگان
Changchun Liu, Shien Hui, Su Pan, Denghui Wang, Tong Shang, Ling Liang,