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1、ThepotentialfortherecoveryandreuseofcoolingwaterAbstractThecoolingwateristhemajorpartofindustrialwateruse,eitherfromtheviewofdemandpriorityorsupplyvolume.Inordertosavewater,theloadingofsupplysystemcanbereducedifthecoolingwatercanberecoveredandreused.Forthisreason,explorationoftherec
2、entoperationstatusofthecoolingwatersystemhasbecomeessential.Thisstudywasinitiallyfocusedonthecurrentapplicationsandreusetrendsofcoolingwaterinoilrefineries,chemicalindustry,steelmills,foodindustry,electronicsworks,textileplantsandpowerstations.Accordingtothestatisticalanalysis,thepo
3、rtablewaterandgroundwateraretheprimarysourcesofmakeupwaterforcoolingsystems.Themultiple-chemicalsmethodandmakeuptreatmentareincreasinglyacceptedforthereclamationofcoolingwater.Ontheotherhand,sidestreamtreatmentandblowdownreusearenotpopular.Therecoveryrateofblowdownisonly26.8%.Thefac
4、tofhighercostisthemajorreasontodepressthewillingnessofrecovery.Somerepresentativeplantshadbeenselectedforcasestudy.However,mostcoolingwatersystemsareonlyoperatedbyoperator’sexperienceaccordingtofieldinvestigation.Ineachcase,thewaterqualityindexeswereusedtoevaluatetheoperationalcondi
5、tionofcoolingwatersystems.Therewasnocaseplantfoundtobeoperatedatappropriatecyclesofconcentration.Thispaperalsopresentedthebottlenecksofconservationtechnologiesofcoolingwater.Thesebottlenecksincludeincreasingthecyclesofconcentration,thereuseofwastewater,andtheblowdowntreatmentforreus
6、e.Thispaperalsodemonstratesthattherecoveryandreuseofcoolingwaterhasgreatpotentialandisfeasiblefortheavailabletechnologies,buttheindustriesarestillunwillingtoupgradebecauseofinitialcostFinally,someapproachesassociatedwithtechnology,economics,environmentandpolicyareproposedtobearefere
7、ncefortheindustriesandthegovernmentauthorities.©1999ElsevierScienceB.V.Allrightsreserved.Keywords:Coolingwater;Recoveryandreuse;Taiwan;Makeup;Blowdown1.IntroductionThedemandofwaterresourcehasapparentlyincreasedbecauseofthehighlyeconomicalgrowth,rapidindustrialdevelopmentandtheupgrad
8、ingoflivingstandard
