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1、第31卷第8期中國(guó)電機(jī)工程學(xué)報(bào)Vol.31No.8Mar.15,20112011年3月15日ProceedingsoftheCSEE?2011Chin.Soc.forElec.Eng.1文章編號(hào)：0258-8013(2011)08-0001-06中圖分類號(hào)：TK227文獻(xiàn)標(biāo)志碼：A學(xué)科分類號(hào)：470?20燃燒調(diào)整對(duì)NOx排放及鍋爐效率的影響1211肖海平，張千，王磊，孫保民(1．電站設(shè)備狀態(tài)監(jiān)測(cè)與控制教育部重點(diǎn)實(shí)驗(yàn)室(華北電力大學(xué))，北京市昌平區(qū)102206；2．神華國(guó)華(北京)電力研究院有限公司，北京市豐臺(tái)區(qū)100069)EffectofCombustion
2、AdjustmentonNOxEmissionandBoilerEfficiency1211XIAOHaiping,ZHANGQian,WANGLei,SUNBaomin(1.KeyLaboratoryofConditionMonitoringandControlforPowerPlantEquipment(NorthChinaElectricPowerUniversity),MinistryofEducation,ChangpingDistrict,Beijing102206,China;2.ShenhuaGuohua(Beijing)ElectricPow
3、erResearchInstituteCo.,LTD,FengtaiDistrict,Beijing100069,China)ABSTRACT:Thecombustion-adjustmentexperimentsfor次風(fēng)比例增加，NOx和鍋爐效率都下降；隨著燃盡風(fēng)擋板NOxemissionreductionwereperformedonan1025t/hboiler.開度增大，爐內(nèi)火焰平均溫度下降，NOx排放濃度下降，鍋Bychangingthefactorssuchastheoxygencontent,top爐效率變化較??；不同配風(fēng)方式下，束腰型配風(fēng)工況
4、的鍋爐tertiary-air,overfire-airandthedistributionofsecond-air,the效率最高，NOx排放量最低，均勻配風(fēng)工況下NOx排放濃regularityofNOxemissionsconcentrationandboilerefficiency度增加了14.20%。在保持一定鍋爐效率的前提下，燃燒調(diào)indifferentworkingconditionswerestudied,andtheresults整可以降低NOx排放濃度10%~20%。indicatesthatchangeofaveragetemperatu
5、reofflameinfurnaceisverysmallunderdifferentoxygenconcentrations.關(guān)鍵詞：燃燒；NOx排放；三次風(fēng)；燃盡風(fēng)；鍋爐效率Thefuel-NOxandtheboilerefficiencyrapidlybecomegreater0引言withincreasingtheoxygencontent,buttheydecreasesbyincreasingthetoptertiary-airgradually.Withtheoverfire-airNOx是主要大氣污染物之一。排入大氣的NOxincreasing
6、,averagetemperatureofflameinfurnaceandNOx引起酸雨和光化學(xué)煙霧污染，破壞臭氧層，嚴(yán)重破emissiondecreases,howeverthisinfluenceonboilerefficiency壞生態(tài)環(huán)境，危害人類健康。在中國(guó)，50%以上的maybeneglected.TheexperimentsalsoconfirmedthattheNOx來(lái)源于電站燃煤鍋爐。目前火力發(fā)電企業(yè)控制mostboilerefficientandtheminimumNOxemissionsoccurresNOx排放的主要技術(shù)有煙氣脫硝及爐
7、內(nèi)燃燒過程脫inconstrictedairdistributionmode,bycomparison,inuniform硝。煙氣脫硝如選擇性非催化還原(selectivenon-mode,theNOxemissionsincreases14.20%.Onthepremiseofacatalyticreduction，SNCR)和選擇性催化還原certainboilerefficiency,theNOxemissionscanbereducedby(selectivecatalyticreduction，SCR)技術(shù)，脫硝率高，10%~20%throughco
8、mbustion-adjustment
