旋流燃烧锅炉的nox排放数值模拟研究 numerical simulation of nox emission in a boiler with swirl burners.pdfVIP
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旋流燃烧锅炉的nox排放数值模拟研究 numerical simulation of nox emission in a boiler with swirl burners
旋流燃烧锅炉的NOx排放数值模拟研究
白 涛,孙保民,郭永红,康志忠,刘建全
华北电力大学电站设备状态监测与控制教育部重点实验室,北京 102206
[摘 要] 某台300MW机组旋流燃煤锅炉通过增大燃尽风量的方法降低了炉内NO。的生成量。
利用计算流体力学(CFD)软件对改进前后炉内的实际燃烧情况、燃烧产物的组分浓度
分布以及NO。的生成规律进行数值模拟研究。结果表明,改进后主燃区内氧量减小,
温度降低,CO浓度增大,使得炉内热力型NO:和燃料型NO。的生成量减少,有效抑制
了NO:的生成,降低了锅炉的总体NO。排放量。
[关 键 词] 锅炉;旋流燃烧;N0:生成量;数值模拟;三次风;燃尽风
[中图分类号]TK314
[文献标识码]A
[文章编号]1002—3364(2012)07一0013—04
[DOI编号]10.3969/j.issn.1002—3364.2012.07.013
NUMERICALSIMULATIONOF EMISSIONINABOILER
NO,
WITHSWIRLBURNERS
BAI
Tao,SUNBaomin,GUO
Yonghong,KANGZhizhong,LiuJianquan
ofCondition andControlforPowerPlant ofEducation
KeyLaboratory Monitoring Equipment,Ministry
(NorthChinaElectricPower 102206,PRC
University),ChangpingDistrict,Beijing
the the airvolumeandenhan—
Abstract:TocontrolN0。emission
duringcombustion,reducingtertiary
weretobe simulationoftheactualcombustion
theoverfireairflow situation,
cing adopted.Numerical
theconcentrationdistributionofcombustionandthecharacteristicof before
products N0,formation
after were CFDsoftware。fora300MW coalfiredboiler.Re—
and retrofittingperformedby pulverized
sultsshow the contentofthe combustionzonereduces,the
that,after
improvement,oxygenprimary
(
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