木糖生產過程換熱網絡的合成及優(yōu)化.pdf

1、天津大學碩士學位論文木糖生產過程換熱網絡的合成及優(yōu)化姓名：徐猛申請學位級別：碩士專業(yè)：化學工程指導教師：李士雨20070101ABSTRACTPopulationoverflowandenergycrisisaretwotopicsoftoday’Sworld，andenergyconservationiSofthetendencyChinaiSoneofthemostimportantcountriesproducingandexpo

2、rtxyloseintheworld，whichhashadmorethanfortyyears’experienceaboutproducingxyloseandourtechnologyhasreachedtheworldadvancedlevelHowevernowadays’ourproducingprocesshasamainproblemthatthesteamconsumptionistoomuch，andtheenerg

3、yisnotcompletelyusedSo，designingandoptimizingtheheatexchangernetworkandmaximizingtheenergysavedareofgreatimportanceSurroundingthissubject，accordingproducing，suchworkhasbeendone：tothebackgroundoftechnologythexylose1Usingp

4、inchtechnologytodiagnosetheenergyusedconditionsofthewholesystem，weexploredthattheenergyWaSnotcompletelyused，andtheheatexchangernetworkwasnotsynthesizedAsaresult，mountsofheatWaswastedInthispaperwecomputedeachstream’Sheatt

5、ransfertemperaturewiththemethodofpseudotemperature，obtainedtheTHgraph，confirmedthepinchpositionofenergysystem，andpicturedcompositecurveandgrandcompositecurveAccordingtopinchtechnologydevisedmatchesofthestreams，andsynthes

6、izedtheheatexchangernetworkwiththecharacterofmaximumenergyrecoveryThetypesofheatexchangerswerechoseThewastageandcostofutilityloadswerecalculatedbeforeandaftertheheatexchangernetworkwassynthesized2Webuiltmathematicalmodel

7、andsimulatedthewholexyloseproducingprocessFinallywedeterminedthemathematicalmodelofheatexchangernetworkintheproducingxyloseprocesswhoseoutputwas5000tonperyeareachheatexchangersinputandoutputstreams’temperature、streams’fl

8、owrateandSOonThemathematicalmodelestablishedthefoundationoftheoptimizationofthelocaleheatexchangernetwork3onthebasisofsensitivitycoefficientsandmathematicalmodelsweanalyzedthesensitivityoftheheatexchangernetwork，foundthe

9、optimalmanipulatedvariablesandtheoptimalretrofittedparameters，andsetthecontrolbypasses，andconfirmedthemaximumofmanipulatedvariablesandtheincreasingvaluesofretrofittedparametersTheheatexchangernetworkcouldbeaccommodatedin