The influence of structure type of chemical wastewater evaporator on heat transfer of evaporator?
Therearemanytypesofevaporatorsforchemicalwastewater.Regardlessofwhich,therefrigerantvapormustbeabletoleavetheheattransfersurfacequicklyandmaintainareasonableliquidlevelheightwhendesigningandmanufacturing,soastomakefulluseoftheheattransfersurfaceeffectively.Asmallamountofswallowvaporproducedduringthethrottlingofrefrigerantliquidcanbeseparatedfromtheliquidbythevapor-liquidseparationequipment,andonlytheliquidseparatedfromthevaporcanbesenttotheevaporatortoabsorbheat,soastoimprovetheheattransfereffectoftheevaporator.Iftheliquidcanboilandvaporizeonthewetheatedsurface,therootofthebubblesissmall,andthevolumeofthebubblesformedissmall,andthebubblesareeasytoriseawayfromtheheatedsurface.Iftheliquidcannotboilonthewettedheatedsurface,thevolumeofbubblesformedislarger,therootislarger,andthenumberofvaporizationcoreswillbereduced.Atthistime,thebubbleswillgatherontheheatingsurfaceanddevelopalongtheheatingsurfacetoproduceavaporfilm,resultinginanincreaseinthermalresistanceandadecreaseinexothermiccoefficient.Somecommonlyusedrefrigerantliquidshavegoodwettability,sotheyhavegoodheatreleaseperformance.AmmoniahasbetterwettabilitythanFreon.Inevaporator,whentherefrigerantliquidontherefrigerantsideismixedwithlubricatingoil,theoilwillwithergreatlyatlowtemperature,easilyadheretotheheattransfersurfaceandformoilfilm,whichwillincreasetheheattransferresistance.Atthesametime,theformationofoilfilmwillalsohindertherefrigerantliquidfromwettingtheheattransfersurfaceandreducetheheattransferefficiency.Inseriouscases,therefrigerantwillabsorbnoexternalheatandloseitsrefrigerationwork.Use.Water,brineandairarecommoncoolingmediainrefrigerationdevices.Theirheatreleaseintensityisrelatednotonlytotheirphysicalproperties,butalsotoexternalfactorssuchasflowvelocity,shapeofflowvelocityandflowpath.Whentheflowrateishigh,thegeometricalshapeoftheflowrateandtheflowpatharereasonable,theheatreleasecoefficientincreases,butthecorrespondingpowerconsumptionandthecostofbasicfacilitiesalsoincrease.Themostsuitableflowrateandthelayoutoffluidpassageshouldbedeterminedbytechnicalandeconomicanalysisandcomparison.
Basic Operation of Taikang High Salt Wastewater Evaporator
TheevaporationefficiencyofTaikanghigh-saltwastewaterevaporatorisdirectlyproportionaltoitsheattransferefficiency,sotounderstandtheprincipleofhigh-saltwastewaterevaporatormuststartwithitsinternalheattransfermechanism.Theevaporatorofhighsaltwastewaterusuallyevaporatesintheheatingtube.Ingeneral,evaporationintubescanbedividedintoseveralstages:._Preheatingsection_Bubblegeneration_emulsifiedsegment_Conversionsegment_Vaporsection.Sincethevaporsectionhasbeenevaporated,itisnotconsidered.Untiltheheattransferefficiencyisjustfromlowtohigh.Inordertomaximizetheevaporationefficiencyofhighsaltwastewaterevaporator,thethicknessoflaminarboundarylayerisgreatlyreducedandthethermalresistanceisgreatlyreduced.ZhejiangTaikangspecializesintheR&D,design,manufactureandproductionofMVRmechanicalrecompressionevaporator,multi-effectfallingfilmevaporator,multi-effectforcedcirculationevaporator,fruitjuiceevaporator,multi-effectcontinuouscrystallizationevaporator,saltevaporator,pharmaceuticalextractionandconcentrationequipment,ordinaryevaporator,high-saltwastewaterevaporator,chemicalwastewaterevaporator,etc.Taikangevaporatoriswidelyusedinchemical,food,pharmaceutical,biological,metallurgicalandotherfields.
What is the main difference between evaporator and condenser of high salt wastewater?
Whatisthemaindifferencebetweenevaporatorandcondenserofhighsaltwastewater?Isthereusuallyalargenozzleoutsidetheevaporatorofhighsalinitywastewater,butasmallcondenser?1.Condenser,evaporatorandcompressorareoutdoors.Intakeandreturnwaterpipesarethesame.Generally,theyare100pipes,whichcontainwater[thatis,refrigerantiswater].Theindoormachinehastwo25or32pipesconnected.Oneistheintakepipeandtheotheristheoutletpipe.Anothersmallpipeisadrainpipe.Inwinter,thewatertemperatureinsidethepipeisabout70degrees,andthetemperatureisblownindoorsthroughtheindoorevaporator.Insummer,theoppositeistrue.2.Thecentralair-conditionerusuallyusesrefrigerantwaterasthemediumtotransferthecoolingcapacity.Therefrigerantwaterexchangesheatwiththerefrigerantintheevaporatoroftherefrigeratory.Afterreleasingheattotherefrigerant,therefrigerantwaterisconveyedtovariousair-conditioningdevicesthroughpumpsandpipesforheatexchangewiththetreatedair.Afterthat,therefrigerantwaterisreturnedtotheevaporatoroftherefrigeratorythroughthereturnwaterpipe,andsoon.3.Thecompressordischargeshightemperatureandhighpressuresuperheatedsteamintothecondenser.Thesteamdissipatesheattotheenvironmentmedium[airorwater]inthecondenserandcoolsintohighpressuresuperheatedliquid.Afterthrottlevalvedecompressionandthrottling,itspraysintotheevaporatorinasaturatedvaporstate,absorbstheheatofrefrigerantwater,andthenturnsintolowtemperatureandlowpressuresaturatedsteam,whichissuckedbackbythecompressorandcirculated.Theshellsideofevaporatorforhighsaltwastewateriswaterandthetubesideisrefrigerant;thecondenserisjusttheopposite.Appearancedifferenceisnotbig,butthematerialofevaporatortubeboxisgenerallybetterthanthatofsupercondenser.Iftheheadboxiscast,itisusuallyacondenser.
Analysis of Wastewater Evaporator in Chemical Industry
Chemicalwastewaterevaporatorisoneofthemostcommonlyusedwastewaterevaporatorsintheprocessindustry.Chemicalwastewaterevaporatorisarelativelyenergy-savingevaporationoperation,inwhichthesecondarysteamvaporizedbytheformereffectiveevaporatorisfedintotheheatingchamberofthelattereffectiveevaporatorastheheatingsteamofthelattereffectiveevaporator.Chemicalwastewaterevaporatorisusedintheprocessofliquidsyrupconcentrationincornchemicalplant.Itistoheatliquidsyrupbyfeedingrawsteamintochemicalwastewaterevaporator,andthenevaporatethewaterinliquidsyrupbyheatingtoachievethepurposeofconcentration.Therearemanyreportsontheresearchandapplicationofmulti-effectevaporationathomeandabroad,buttherearemanystudiesontheconstant-scalequasi-optimaldesignbasedonmulti-effectevaporationdesignproblemsolving,andfewstudiesontheprocesssimulationandoperationoptimizationbasedontheoperationofchemicalwastewaterevaporator.Thestructureandcharacteristicsofchemicalwastewaterevaporatorareanalyzed.Theworkingprincipleofchemicalwastewaterevaporatoranditsapplicationinchemicalenterprisesareintroduced.Intheprocessofwastewaterconcentration,tubefallingfilmevaporatorisused,andtheflowsteamofwastewaterintubeiscondensedandheatedinshellside.报错
