NOx emission and thermal efficiency of a 300 MWe utility boiler retrofitted by air staging

被引：125

作者：

Li, Sen ^{[1
]}

Xu, Tongmo ^{[2
]}

Hui, Shien ^{[2
]}

Wei, Xiaolin ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Mech, Beijing 100080, Peoples R China

[2] Xi An Jiao Tong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China

来源：

APPLIED ENERGY | 2009年 / 86卷 / 09期

关键词：

NOx emission; Boiler thermal efficiency; CCOFA; SOFA; NITROGEN CONVERSION; COAL;

D O I：

10.1016/j.apenergy.2008.12.032

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

080707 [能源环境工程]; 082001 [油气井工程];

摘要：

Full-scale experiments were performed on a 300 MWe utility boiler retrofitted with air staging. In order to improve boiler thermal efficiency and to reduce NOx emission, the influencing factors including the overall excessive air ratio, the secondary air distribution pattern, the damper openings of CCOFA and SOFA, and pulverized coal fineness were investigated. Through comprehensive combustion adjustment, NOx emission decreased 182 ppm (NOx reduction efficiency was 44%), and boiler heat efficiency merely decreased 0.21%. After combustion improvement, high efficiency and low NOx emission was achieved in the utility coal-fired boiler retrofitted with air staging, and the unburned carbon in ash can maintain at a desired level where the utilization of fly-ash as byproducts was not influenced. All rights reserved (C) 2009 Elsevier Ltd..

引用

页码：1797 / 1803

页数：7

共 18 条

[1]

SCR catalyst performance in flue gases derived from subbituminous and lignite coals [J].