电站锅炉燃烧优化在线控制策略-研究

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1、AbstractAbstractBoilercombustionoptimizationtechniquesareoneofmeanstoachieveefficientcombustionboilers,lowpollutionemissionsandsavegeneratingcost.Especiallyinrecentyears,asChina’sincreasinglydemandingofpowergenerationcompaniesonenergyconservationandle

2、velsofpowerplantsautomation,itsimportancehasbecomeincreasinglyprominent.Datashowsthatmostofourcoal-firedunitspresenthavesuchproblemsinvaryingdegreeswithinsufficientoutput,shortoperatingcycle,highheatlossofashincompletecombustionandexhaustgas.Merelyusi

3、ngtraditionalcombustionoptimizationtestcannotreallyachievelong-termandeffectiveresultsofcombustionoptimization,soit’snecessarytoprofoundlyresearchcombustionoptimizationsystems.Accordingtothecharacteristicoffossilpowerplants,thisthesisfocusonthekeyissu

4、esaboutmodeling,optimizationandcontrolofboilercombustionsystems,andtheapplicationona600MWcoal-firedunit.Thesimulationstudyandapplicationintherealunitprovedthattheresearchcanimplementthesynthesisoptimizationcontrolofboilercombustion,improvetherunningle

5、velofboilerinstrumentstooptimumandmakeitefficientandcleaner.Themainworkandcontributionsofthethesisareasfollows:(1)Accordingtopowermarketcharacteristicandnaturalenvironmentnowadays,threekindsofoptimizationobjectswhichcoordinatedbetweeneconomicefficienc

6、yandenvironmentalprotectionwereproposedtodeducethecalculationmethodofboileroperationcost.Usinggeneticalgorithmoptimizationofthethreegoals,theboilerthermalefficiency,NOxemissionsandoperationalcostunderthreegoalswereobtained.(2)Acombustionoptimizationco

7、ntrolstrategywasproposedbasedonthecombinationofsteadyoptimizationandnonlinearpredictivecontrol.Dynamicnonlinearoptimizationcontrolwasachievedduringtheboilercombustionprocess.Thesimulationandrunningonsiteshowedthattheproposedoptimizationstrategycouldre

8、alizethedynamicoptimizationcontrolofboilercombustion.(3)Theestablishedmodelwereputtedintotheboileroperationtoobtaindosed-loopcontrolofcombustionoptimizationofexperimentaldata,afteranalyzingandcomparing,combustionoptimizationsystemenablestheboi