燃烧室
燃烧
氮氧化物
煤粉锅炉
喷嘴
气流
煤
锅炉(水暖)
分级燃烧
环境科学
化学
燃烧室
废物管理
热力学
航空航天工程
工程类
物理
有机化学
均质压燃
作者
Jianping Jing,Zhengqi Li,Qunyi Zhu,Zhichao Chen,Ruoqiang Feng
出处
期刊:Energy
[Elsevier]
日期:2011-02-01
卷期号:36 (2): 1206-1213
被引量:37
标识
DOI:10.1016/j.energy.2010.11.025
摘要
Cold airflow experiments on a small-scale burner model, as well as in situ experiments on a centrally fuel-rich swirl coal combustion burner were conducted. Measurements were taken from within a 300 MWe wall-fired pulverized-coal utility boiler installed with eight of centrally fuel-rich swirl coal combustion burners in the bottom row of the furnace during experiments. Various primary air ratios, flow characteristics, gas temperature and gas species concentrations in the burner region were measured. The results of these analyses show that with decreasing primary air ratio, the swirl intensity of air, divergence angles and maximum length and diameter of the central recirculation zone all increased, and the turbulence intensity of the jet flow peaked but decayed quickly. In the burner nozzle region, gas temperature, temperature gradient and CO concentration increased with decreasing primary air ratio, while O2 and NOx concentration decreased. Different primary air ratios, the gas temperatures and gas species concentrations in the side-wall region varied slightly.
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