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含微细褐煤灰粉颗粒湿烟气横掠水平翅片管束冷凝特性研究的中期报告 Abstract: Withtheincreasingconcernoverenvironmentalissues,wetfluegasdesulfurization(WFGD)technology,asoneofthemainmethodsforcontrollingsulfurdioxide(SO2)emissionsfromcoal-firedpowerplants,hasbecomeanimportantareaofresearch.IntheWFGDprocess,flyashparticlessuspendedinthefluegascanbecapturedandseparated,resultinginwetashhandling.However,intheprocessofwetashremoval,theconcentrationofashparticlesinthefluegasmayincrease,leadingtopotentialfoulingandcorrosionissuesindownstreamequipment,suchasheatexchangersandairpreheaters. Inthisstudy,weinvestigatethecondensationcharacteristicsofwetfluegascontainingfinebrowncoalashparticlespassingthroughahorizontalwing-shapedtubebundle.Theexperimentalsystemconsistsofafluegasgenerator,asamplingandanalysissystem,andacondensationheattransfertestapparatus.ThefluegasgeneratorcanproducesimulatedfluegaswithhighhumidityandSO2concentrations,whilethesamplingandanalysissystemcancollectandmeasuretheconcentrationofashparticlesinthefluegas.Thecondensationheattransfertestapparatusincludesahorizontalwing-shapedtubebundle,awatercirculationsystem,andadataacquisitionsystem. Experimentswereconductedunderdifferentoperatingconditions,includingmassflowrateoffluegas,waterflowrate,ashcontent,andtemperaturedifferencebetweenthefluegasandcoolingwater.Theinfluenceoftheseoperationalparametersonthecondensationcharacteristicsoffluegascontainingfinebrowncoalashparticleswasanalyzed.Theresultsshowthatthepresenceofbrowncoalashparticlesinwetfluegascansignificantlyaffecttheheattransferperformanceofhorizontalwing-shapedtubebundles.Astheashcontentincreases,theheattransfercoefficientgraduallydecreases,andthefoulingresistanceincreases.Inaddition,whenthewaterflowrateandcoolingwatertemperaturearekeptconstant,theheattransfercoefficientdecreasesastheflowrateandtemperatureofthefluegasincrease. Overall,theresultsofthisstudyprovideimportantguidanceforthedesignandoperationofwetfluegasdesulfurizationsystemsanddownstreamequipmentincoal-firedpowerplants.Byoptim