夹点技术在常压蒸馏装置低温余热回收利用中的应用

*＊＊266580。ΔTmin15℃115℃100℃57．87MW38．09MW。。。Linnhoff1。。2。。3。。1pinchtechnology“”“”4。5。6123。。71。NHNCNHNC。2。CPHCPC。3。。。2012－02－072012－04－20。。*51178463。＊＊[e-mail]。—16—22．1。1。1Table1Dataofheatstreams/kg·h－1820410260180/℃11092146140/℃26362330/MW17．7912．7618．6614．47/MW·℃－10．210．230．150．131463．68MW。25℃100℃100℃。25℃100℃。2。2Table2Dataofcoldstreams/kg·h－1180105/℃5025/℃90100/MW8．4075．05/MW·℃－10．212．28。T-HT-H3。11Ⅰ。8。11Ⅱ。21Ⅲ。1Fig．1CurveofflowinT-Hdiagram、。1℃92Ⅰ。T2T2～T2+1℃1℃。1℃2Ⅱ。2．3—26—25℃100℃100℃100℃100℃101℃。3。2Fig．2CurveofflowwithphasechangeinT-Hdiagramandproblemtable3Table3Dataofheatandcoldstreams/kg·h－1820410260180180105105/℃110921461405025100/℃2636233090100101/MW17．7912．7618．6614．468．409．1965．86/MW·℃－10．210．230．150．130．210．1265．8610～20℃10ΔTmin15℃3。1134107．5℃115℃100℃。57．87MW38．09MW。3Fig．3Problemtable2．41。、4Ⅰ。100℃4．70MW3．29MW57．87MW。4Ⅱ。9．19MW25℃100℃1．99MW。8．40MW50℃90℃9．39MW。。4Fig．4Networkdesignaboveandbelowpinchpoint—36—25C1～C4H112。5Fig．5Integratedheatexchangernetwork31。1℃1℃。2ΔTmin15℃107．5℃115℃100℃57．87MW38．09MW。3。1LinnhoffB．Pinchanalysis—astate-of-the-artoverviewJ．ChemEngResDes199371A503-522．2．J．200924571-74．3．J．2000294275-278．4．J．201027111513-1517．5．J．200823667-69．6．M．3．2009146-298．7．J．200515628-31．8．D．2010．9．ExcelJ．200926111438-1442．10．J．2009272149-153．11．ΔTminJ．2011311182-85．ApplicationofpinchpointtechnologyinrecoveryoflowtemperatureheatinacrudedistillationunitShenChanchanZhaoDongfengXueJianliangLiShiCollegeofChemicalEngineeringUniversityofPetroleumHuadongQingdaoShandong26658AbstractThelowtemperatureheatfromavacuumdistillationwasstudiedtofullyrecoveragreatamountoflowtemperatureheatinoilrefinery．TheProblemTablewasusedtoshowthepinchinthedesignofheatex-changertrain．Forphasechangesintheheattransferprocesscoldstreamsweretreatedbyincreasingtemper-atureandhotstreamsweretreatedbydecreasingtemperature．TheresultsshowedthatwhenΔTminwas15℃thepinchpointdeterminedbyProblemTablewasatwherethehotstreamwas115℃andthecoldstreamwas100℃．Inthisconditiontheminimumheatingloadrequiredbyheatexchangertrainwas57．87MWandtheminimumcoolingloadwas38．09MW．Accordingtothedesignprinciplesandthestreammatchcriteriaofpinchtechnologythefinalintegratedheatexchangertrainwasobtained．KeyWordslowtemperatureheatpinchpointtechnologyphasechangeproblemtable—46—