Combustion characteristics and NOx emissions of two kinds of swirl burners in a 300-MWe wall-fired pulverized-coal utility boiler

被引：56

作者：

Li, Zhengqi ^{[1
]}

Jing, Jianping ^{[1
]}

Chen, Zhichao ^{[1
]}

Ren, Feng ^{[1
]}

Xu, Bin ^{[1
]}

Wei, Hongda ^{[1
]}

Ge, Zhihong ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Energy Sci & Engn, Harbin 150001, Peoples R China

来源：

COMBUSTION SCIENCE AND TECHNOLOGY | 2008年 / 180卷 / 07期

关键词：

NOx; pulverized coal; swirl burner; utility boiler;

D O I：

10.1080/00102200802043318

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Measurements were performed in a 300-MWe wall-fired pulverized-coal utility boiler. Enhanced ignition-dual register (EI-DR) burners and centrally fuel rich (CFR) swirl coal combustion burners were installed in the bottom row of the furnace during experiments. Local mean concentrations of O-2, CO, CO2 and NOx gas species, gas temperatures, and char burnout were determined in the region of the two types of burners. For centrally fuel rich swirl coal combustion burners, local mean CO concentrations, gas temperatures and the temperature gradient are higher and mean concentrations of O-2 and NOx along the jet flow direction in the burner region are lower than for the enhanced ignition-dual register burners. Moreover, the mean O-2 concentration is higher and the gas temperature and mean CO concentration are lower in the side wall region. For centrally fuel rich swirl coal combustion burners in the bottom row, the combustion efficiency of the boiler increases from 96.73% to 97.09%, and NOx emission decreases from 411.5 to 355 ppm @ 6% O-2 compared to enhanced ignition-dual register burners and the boiler operates stably at 110 MWe without auxiliary fuel oil.

引用

页码：1370 / 1394

页数：25

共 19 条

[1]

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[2]

LOCAL PARTICLE-VELOCITY, SIZE, AND CONCENTRATION MEASUREMENTS IN AN INDUSTRIAL-SCALE PULVERIZED COAL-FIRED BOILER [J].