ZhejiangElectricPower第42卷第2期2023年2月Vol.42,No.02Feb.25.2023三塔合一间接空冷塔烟气流动特性研究李金芳1,韩高岩2,谢娜1,张晓晴3,王智3(1.杭州意能电力技术有限公司,杭州310012;2.国网浙江省电力有限公司电力科学研究院,杭州310014;3.华北电力大学(保定)动力工程系,河北保定071003)摘要:由于不同机组负荷会影响三塔合一间接空冷系统的流动换热特性和烟气扩散效果,对某1000MW机组三塔合一间接空冷塔进行了数值研究。结果表明:随着负荷增加,三塔合一间接空冷塔的抽力和通风量在100%负荷时分别是50%负荷时的1.47倍和1.3倍,同时高负荷运行的空冷塔冷却能力更强;增加负荷会减少SO2在空冷塔内壁上的浓度,增加烟气的抬升高度,相对于50%负荷,在100%负荷时SO2浓度减少了4.55mg/m3,烟气最大扩散高度最多时提升了16.72m。关键词:数值模拟;变负荷;烟气扩散;三塔合一;间接空冷塔DOI:10.19585/j.zjdl.202302014开放科学(资源服务)标识码(OSID):Characteristicstudyonfluegasofa“three-in-one”indirectaircoolingtowerLIJinfang1,HANGaoyan2,XIENa1,ZHANGXiaoqing3,WANGZhi3(1.EEnergyTechnologyCo.,Ltd.,Hangzhou310012,China;2.StateGridZhejiangElectricPowerCo.,Ltd.ResearchInstitute,Hangzhou310014,China;3.PowerEngineeringDepartment,NorthChinaElectricPowerUniversity(Baoding),Baoding,Hebei071003,China)Abstract:Differentunitloadsaffecttheflowheattransfercharacteristicsandfluegasdiffusionofa“three-in-one”indirectair-coolingsystem.Anumericalstudyiscarriedoutonthetowerofa1000MWunit.Theresultsshowthatastheloadincreases,theextractioneffectandventilationcapacityofthetowerat100%loadare1.47and1.3timeshigherthanthoseat50%load,respectively.Moreover,thecoolingcapacityofthetowerislargerathigherloads.LoadincreasecanreducetheconcentrationofSO2ontheinnerwalloftheair-coolingtowerandraisetheliftheightoffluegas.At100%load,theSO2concentrationisreducedby4.55mg/m3,andthemaximumfluegasdiffusionheightisraisedbyupto16.72mcomparedto50%load.Keywords:numericalsimulation;variableload;fluegasdiffusion;“three-in-one”tower;indirectair-coolingtower0引言三塔合一系统[1-2]是将脱硫塔、烟囱内置于间接空冷塔[3-4]内,通过...