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超超临界锅炉受热面状态吹灰研究 (1)

ABSTRACT

Heatingsurfacecontaminationofcoal—firedboileraffectstheefficiencyandsafeoperationoftheboiler,usuallysootblowerisusedtosolvethelong-standingproblemintheoperationofthepowerproduction.Butthetimingandno-partitionsoot—blowingmodecannotelLsuretheheatingsurfacerunninginacleanstateundertheconditionofminimumenergyconsumption.Therefore,weresearchonscientificsoot-blowingwaystoreducethefoulingofheatingsurfacehasimportantpracticalsignificance.

Inviewofthephenomenonthatfoulingandslagginginheatingsurfaceoftheboileris

serious,thearticletakestheboilerof660MWinJingdezhenpowerplantunitastheresearch

object,andcarriesouttheresearchworkincharacteristicsoffoulingcharacteristics,foulingmonitoringandSoot-blowingstrategyonboilerheatingsurface。Firstofall,thearticleanalysestheformationmechanismofcoalashandingredientcharacteristics.Andthearticle

andslaggingcharacteristics,operationanalysesthecoalywhicheffectheatingsurfacefouling

levelandthearrangementstructureofheatingsurfacesandotherfactors.Secondly,accordingtothecontaminationmechanismanddifferentheattransferways,monitoringtheregionwhichisdividedintoradiationheatingsurfaceandconvectionheatingsurface.Andradiationheatingsurfacecokingmonitoringmodelandconvectionheatingsurfacefoulingmonitoringmodelareestablished,theformertakesthefurnaceoutletgastemperatureasthefoulingcharacteristicparameters,andthelattertakescleanlinessfactorasthefordingcharacteristicparameters.Andusingdatareal-timecollectedfromDASsystemofpowerplant,combined

withthevariationoffoulingfora

longtimetoverify.Finally,combined、析廿ltheengineering

streamsoot-blowingtechnologyandexamples,wecarryacontrastanalysisonmain

soot??blowingwaysforcoal?firedboiler.Wehavearesearchontheselectionmethodofsoot-blowingschemeandblowingcycledeterminants,putforwardstatesoot—blowingoptimizationschemewhichisbasedonpositivecoefficientofenergy.

Theresearchshowsthat,inthevariationconditionofcoalandboilerload,theselection

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