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[1]赵斯楠,方庆艳,马 仑,等.燃烧初期化学当量比对锅炉 NOx生成与排放特性的影响[J].燃烧科学与技术,2017,(03):236-241.[doi:DOI 10.11715/rskxjs.R201603055]
 Zhao Sinan,Fang Qingyan,Ma Lun,et al.Influence of Stoichiometric Ratio at Initial Combustion Stage on NOxFormation and Emission Characteristics of a Utility Boiler[J].Journal of Combustion Science and Technology,2017,(03):236-241.[doi:DOI 10.11715/rskxjs.R201603055]
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燃烧初期化学当量比对锅炉 NOx生成与排放 特性的影响()
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《燃烧科学与技术》[ISSN:1006-8740/CN:12-1240/TK]

卷:
期数:
2017年03
页码:
236-241
栏目:
出版日期:
2017-06-15

文章信息/Info

Title:
Influence of Stoichiometric Ratio at Initial Combustion Stage on NOx Formation and Emission Characteristics of a Utility Boiler
作者:
赵斯楠方庆艳马 仑陈 刚
华中科技大学煤燃烧国家重点实验室,武汉 430074
Author(s):
Zhao SinanFang QingyanMa LunChen Gang
State Key Laboratory of Coal Combustion,Huazhong University of Science and Technology,Wuhan 430074,China
关键词:
塔式锅炉NOx 排放化学当量比数值模拟
Keywords:
tower boilerNOx emissionsstoichiometric rationumerical simulation
分类号:
TK227
DOI:
DOI 10.11715/rskxjs.R201603055
文献标志码:
A
摘要:
采用数值模拟方法,研究了燃烧初期化学当量比对一台 1,000,MW 超超临界塔式锅炉在中低负荷下 NOx 生成与排放特性的影响.计算值与试验测量值符合较好.结果表明,中低负荷下煤粉燃烧初期化学当量比下降, 热力型 NOx 与燃料型 NOx 生成速率均明显降低,且已生成的 NOx 被还原的速率增加,NOx 排放也随之降低.现 场试验中,通过关小周界风挡板开度降低燃烧初期化学当量比,锅炉在 700,MW 和 500,MW 负荷下 NOx 排放分 别下降了 20.6%,和 28.2%,,且不会对锅炉效率及蒸汽参数等产生负面影响.
Abstract:
Numerical simulations were conducted to investigate the influence of stoichiometric ratio at initial combustion stage on NOx formation and emission characteristics of a 1,000,MW ultra-supercritical tower boiler. The calculated values are highly consistent with the measured values. The results indicate that with decreasing stoichiometric ratio at initial combustion stage at medium-low loads,the formation rates of thermal NOx and fuel NO x greatly decrease,and the reduction rate of generated NOx increases,eventually leading to the decrease of NOx emissions. In field trials,fuel-air damper opening was reduced to decrease the stoichiometric ratio at initial combustion stage. The NOx emissions decrease by 20.6%, at 700,MW and by 28.2%, at 500,MW without negative effects on boiler efficiency and steam temperature.

备注/Memo

备注/Memo:
收稿日期:2016-03-25. 基金项目:华中科技大学校青年基金资助项目(01-18-120070). 作者简介:赵斯楠(1994— ),男,硕士研究生,13297918100@163.com. 通讯作者:方庆艳,男,博士,副教授,qyfang@hust.edu.cn.
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