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300MW煤矸石发电机组SO2排放超标原因分析及处理措施.pdf

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内蒙 古 电力 技 术 2013年第31卷第 1期 INNER MONG0LIA ELECTRIC POWER doi:10.3969~.issn.1008-6218.2013.01.016 300MW煤矸石发 电机组S02排放超标 原 因分析及处理措施 段守保 (神华神东电力有限责任公司萨拉齐电厂,内蒙古 包头 014100) 摘要:神华神东电力有限责任公司萨拉齐电厂2~300MW煤矸石发电机组在投产初期, 高负荷时SO:排放指标超标,分析认为主要原因为设计煤种与实际燃用煤种发热量及硫分差 异较大、锅炉床温高及石灰石系统投入率低等。对此,提 出加大矸石与低硫煤的掺烧质量比 至7:3,对锅炉进行一、二次风量及上、下二次风量送入比例进行优化调整,合理分布石灰石 粒径、保证石灰石系统投入等解决措施。实施后效果良好,SO排放超标问题得到解决。 关键词:循环流化床锅炉;烟气污染物;SO:排放超标;床温;硫分 文献标志码:B 中图分类号:TM621.2 文章编号:1008—6218(2013)01—0109—04 CauseAnalysisand ItsTreatmentforS02Emission Exceeding in 300MW CoalGangueGenerating Units Duan Shoubao (ShenhuaShendongSalaqiPowerPlant,InnerMongolia Baotou o141oo) Abstract~S02 exceeded emission standard athigh load when SalaqiPowerPlantput into service in the early stage,because of the calorific value and sulfur content larger between the designed and actualburning coal,the circulating fluidized boilerS high bed temperature and the limestone system S low HIB rate.By taking measuresthat increasing thepropo~ion ofwasterock and low—sulfurcoalto 7:3,adjusting theboilerrunning operation between the primary air and secondary air, distributing reasonably limestone powder diameter and ensuring the urn rate of limestone system etc,the level of SO2 emission hasbeen obviously decreased and meetsthecurrentrequirementsofenvironmental protection emission standard in theend. Keywords:circulatingfluidizedbed (CFB)boiler;fluegaspollutants;SO2exceeding emission standrad;bedtemperature;sulfurcontent 0 引言 成。烟气中SO:排放能否达标,会受到诸多因素影
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