کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6681499 1428079 2018 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of primary air cone length on combustion characteristics and NOx emissions of a swirl burner from a 0.5 MW pulverized coal-fired furnace with air staging
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی مهندسی انرژی و فناوری های برق
پیش نمایش صفحه اول مقاله
Influence of primary air cone length on combustion characteristics and NOx emissions of a swirl burner from a 0.5 MW pulverized coal-fired furnace with air staging
چکیده انگلیسی
This paper presents experimental research on cold flow, combustion characteristics, and NOx emissions of a swirl burner with air staging. The aim of the research is to investigate the influence of primary air cone length on the swirl burner performance. Cold flow air experiments on a centrally fuel-rich swirl burner with an over-fire air ratio of 25% were performed, and it was observed that when the dimensionless primary-air cone length (i.e., Lp/Li, Lp and Li respectively denoting the primary-air cone length in the cold-modeling experiments and inner secondary-air cone length) increases from 0 to 0.75, the diameter and length of the recirculation zone reduces from 0.91 d and 1.51 d to 0.68 d and 0.57 d, respectively. An investigation was conducted in a 0.5 MW laboratory furnace in order to optimize the primary-air cone length of a centrally fuel-rich swirl burner. The flame stability, performance of ignition, and burnout are significantly improved by decreasing the primary-air cone length. The NOx emissions measured at the furnace exit with a cone length Lp/Li = 0 decreased by 50.3% compared to those measured with a cone length Lp/Li = 1.0. Based on the evaluation of flame stability, performance of the ignition, burnout, and low NOx emissions, the optimum value of primary-air cone length was observed to be Lp/Li = 0.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Energy - Volume 211, 1 February 2018, Pages 1179-1189
نویسندگان
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