Tertiary-air effects on combustion and NOxemission in tangentially fired furnace

被引：0

作者：

Gou, Xiang ^{[1
]}

Zhou, Jun-Hu ^{[1
]}

Zhou, Zhi-Jun ^{[1
]}

Yang, Wei-Juan ^{[1
]}

Liu, Jian-Zhong ^{[1
]}

Cen, Ke-Fa ^{[1
]}

机构：

[1] State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China

来源：

Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2008年 / 28卷 / 08期

关键词：

Carbon dioxide - Carbon monoxide - Coal - Computational fluid dynamics - Contamination - Oxygen - Power plants - Temperature distribution;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Numerical simulation on the flow, combustion and contamination generation process under the three different conditions: single-mill, double-mills and non-mill, with the rated load in a 410 t/h tangentially fired furnace in a domestic thermal power plant was performed with CFD software platform. The numerical simulation shows that no matter what mill is used, the highest temperature is in the burner zone, the temperature distribution has a corresponding relationship with the concentrations of the components, and the high temperature zone is characterized by high carbon monoxide concentration, low carbon dioxide and low oxygen concentration. The NOxconcentration at the outlet of the furnace is the highest with non-mill, the second highest with single-mill and the lowest with double-mills. The main reason is that the staged-air combustion formed by single-mill makes the main combustion zone lack of oxygen and the coal in tertiary-air reburns. As the volumes of tertiary-air and coal are more with double-mills than with single-mill, staged-air and reburning become more effective. The outlet temperature of the furnace is the highest with double-mills, the second highest with single-mill and the lowest with non-mill. The NO concentration increases with the furnace height during the burnout process as HCN and Char-N are transformed to NO in all three operation conditions. Engineering testing shows that the results from numerical simulation are in conformity with real operation condition.

引用

页码：7 / 12