To reduce oil consumption during firing-up and partial-load operation, a tiny-oil ignition burner has been recommended. Through reacting-flow experiments performed on a full-scale experimental setup, the influence of different oil flow rates on bituminous coal combustion as well as flow rates without coal feed was analyzed. The ignition burner is identical to that normally used in an 800 MWe utility boiler. Under operating conditions with flow rates of 50, 100, and 150 kg/h, gas temperature distributions were measured in the burner. At the equivalent measuring points at the exits of the first and second combustion chambers, these distributions remained almost unchanged under a constant coal feed rate of 4 t/h. However on the burner centerline, distributions increased slightly with increasing flow rate. Different gas concentrations were measured at the center of the burner exit. For instance, the O2 concentration at the burner exit varied from 0.01% to 0.31% whereas CO concentrations were more than 10000 ppm. At the same coal feed rate of 4 t/h, burner resistances are 480, 600, and 740 Pa for oil flow rates of 50, 100, and 150 kg/h, respectively.
Corresponding Author(s):
LI Zhengqi,Email:green@hit.edu.cn
引用本文:
. Influence of different oil feed rate on bituminous coal ignition in a full-scale tiny-oil ignition burner[J]. Frontiers in Energy, 2013, 7(3): 406-412.
Chunlong LIU, Qunyi ZHU, Zhengqi LI, Qiudong ZONG, Xiang ZHANG, Zhichao CHEN. Influence of different oil feed rate on bituminous coal ignition in a full-scale tiny-oil ignition burner. Front Energ, 2013, 7(3): 406-412.
Burner resistance during firing-up with coal feed rate 4 t·h-1 /Pa
50
0.31
>10000
480
100
0.01
600
150
0.05
740
Tab.5
Fig.4
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