资源描述：
《电导率、ph与氨浓度关系（the relationship between conductivity, ph and ammonia concentration）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、电导率、ph与氨浓度关系（Therelationshipbetweenconductivity,pHandammoniaconcentration）RelationshipbetweenconductivityandpH,ammoniaconcentrationinultrapurewater1.introductionIntheconstructionofChina'spowerplants,300MWand600MWgradeoftheunithasbeenthemainforceunitinthermal
2、powerplant,withlargecapacityunits,steamparametersgenerallyrequireasubcriticalorsupercriticalwithsuitable,andlargecapacityandhighparameterunitare100%condensationwatertreatmentprocess.Moderncondensatetreatmenttechnology,thepreparationofultrapurewaterabove10Moh
3、mcmhasbecomecommonplace.By100%thesettingofthermodynamicsystemofwatertreatment,watertreatmentisgenerallyusedinthecorrectionapproachofAVT(i.e.,ammoniaandhydrazineallvolatiletreatmentmethod)orbyOT(orCWT)way(i.e.combinedwatertreatment),nomatterwhatkindoftreatmen
4、tmethod,mustbeaddedinammoniainordertocontrolthewatersupply,waterpHvalueismaintainedinacertainrange.PH,ammoniacontentsandconductivityofwatermonitoringisaveryimportantwork.Atthescene,pH,commonlyusedinstrumentforcontinuousconductivitydetermination,anddeterminat
5、ionofammoniacontentsusuallyadoptsmanualcolorimetricmethod.Infact,the100%condensatewatertreatmentsystem,thecontentinthermalsystemofcarbondioxidecanbeconsideredapproximatelyequaltozero,whiletheconcentrationofotherequivalentconductancelargercationsandanionshave
6、reachedafewmicrogramsperliterorevensubmicrogramlevel,inthiscase,therearestrictmathematicalrelationshipsbetweenammoniacontentsofconductivitypH,water.Wecangettherelationshipbetweenthethreebystrictmathematicaldeduction,soaslongaswemeasureonedata,wecanfindtwooth
7、erdata.Generallyspeaking,ItisdifficulttomeasurethepHvalueofultrapurewater,becausetheresistanceofultrapurewaterisverylarge,almostaninsulator.Itisalsotroublesometousecolorimetricmethodtomeasuretheconcentrationofammonia.Incontrast,theconductivityofultrapurewate
8、risarelativelyeasytomeasureandeasytomeasuredata,andthemeterpriceischeaper.Therefore,aslongaswemeasureacorrectconductivitydata,calculateaccordingtotheformulaorfindoutaccordingtothecurveandtheform
