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1、第４４卷第１２期热力发电Vol?４４No?１２２０１５年１２月THERMALPOWERGENERATIONDec．２０１５??????????????????????????????????????????????????脱硫废水烟道喷雾蒸发过程的数值模拟吴帅帅１,２,李红智２,陈鸿伟１,穆兴龙１,李凡１(１．华北电力大学能源与动力工程学院,河北保定０７１００３;２．西安热工研究院有限公司,陕西西安７１００３２)[摘要]针对脱硫废水处理问题,建立了烟道内气液两相流动、传热传质和雾化液滴蒸发的数学模型,并利用该模型对某３３０MW机组锅炉空气预热器后接烟道内雾化液滴的蒸发过程进行模拟研究,分
2、析了烟气温度、雾化液滴初始直径、初始温度和初始速度对其完全蒸发时间的影响.结果表明:烟气温度越高,雾化液滴完全蒸发所需要的时间越短;雾化液滴初始直径越大,其完全蒸发时间越长;雾化液滴初始速度和初始温度对其完全蒸发时间的影响不大;雾化液滴完全蒸发过程中,烟气温度最佳值为１３４℃及以上,雾化液滴初始直径最佳值为１０~６０μm.该结果可为脱硫废水烟道蒸发处理系统的设计及运行优化提供参考.[关键词]脱硫废水;烟道;烟气;雾化;蒸发;液滴直径;温度;速度[中图分类号]X５２[文献标识码]A[文章编号]１００２Ｇ３３６４(２０１５)１２Ｇ００３１Ｇ０６[DOI编号]１０．３９６９/j．issn．１０
3、０２Ｇ３３６４．２０１５．１２．０３１Numericalstudyonsprayevaporationprocessofdesulfurizationwastewaterinflueduct１,LIHongzhi２,CHENHongwei１,MUXinglong１,LIFan１WUShuaishuai(１．SchoolofEnergyandPowerEngineering,NorthChinaElectricPowerUniversity,Baoding０７１００３,China;２．Xi＇anThermalPowerResearchInstituteCo．,Ltd．,Xi＇an７１００３
4、２,China)Abstract:AmathematicalmodeldescribinggasＧliquidtwophaseflow,heatandmasstransferandatomＧizeddropletevaporationinflueductwasestablishedanditsreliabilitywasverifiedcombingwiththeactualoperatingdataofautilityboiler．Moreover,takinga３３０MWunitastheexample,thismodelwasappliedtosimulatetheevaporat
5、ionprocessoftheatomizeddropletsintheflueductafterthepreheater．Theeffectsoffluegastemperature,atomizeddropletdiameter,initialdroplettemperatureandvelocityonthedroplets＇lifetimewereanalyzed．Theresultsshowthatthesimulationresultsagreewellwiththeexperimentaldata,inＧdicatingthismodelcansatisfytherequi
6、rementsofthermalcalculationfordesulfurizationwastewaterflueductsprayingsystem．Thedroplets＇lifetimegetsshorterwithanincreaseinthefluegastemperature．Thelargerthedropletssize,themoreviolentthechangesinthedroplets＇lifetime．TheinitialdroplettemperaＧtureandvelocityhaslittleeffectsonthedroplets＇lifetime
7、．Duringthedropletsevaporation,theoptimumfluegastemperatureis１３４℃andtheaboveandthemostsuitabledropletdiameterisbetween１０μmand６０μm．TheconclusioncanprovidebasisforthesystemdesignfordesulfurizationwastewatersprayevapoＧrati
