热科学学报（英文版）2008，Vol.17Issue(3)：267-274,8.
Numerical Study on Reduction of NOx and Unburned Carbon in Micronized Coal Reburning
Numerical Study on Reduction of NOx and Unburned Carbon in Micronized Coal Reburning
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作者信息
- 1. School of Chemical Engineering, Dalian University of Technology, 158 Zhongshan Road, Dalian 116012, China;School of Chemical Engineering, Dalian University of Technology, 158 Zhongshan Road, Dalian 116012, China
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摘要
Abstract
Three dimensional numerical simulation of bituminous coal rebuming in a full-scale tangentially fired boiler was conducted with CFD method to study the effects of rebum zone length, the height of rebum nozzles, the stoichiometric ratio in reburn zone, the rebum fuel fraction and the rebum coal fineness on NOx reduction efficiency and unbumed carbon in fly ash. The results indicate that the NOx reduction efficiency reaches the largest value when the relative height of rebum nozzles is about 0.21 and the stoichiometric ratio is between 0.8 and 0.9 in rebum zone; NOx reduction efficiency increases with reburn zone length, rebum fuel fraction and the decrease of reburn coal particle size; the smaller the coal particle size is, the better the burnout performance of coal is.关键词
Micronized coal reburning/NOx reduction/unburned carbon/numerical simulation/full-scale boilerKey words
Micronized coal reburning/NOx reduction/unburned carbon/numerical simulation/full-scale boiler分类
数理科学引用本文复制引用
..Numerical Study on Reduction of NOx and Unburned Carbon in Micronized Coal Reburning[J].热科学学报（英文版）,2008,17(3):267-274,8.
