简介：Themicroporesilencerwasdevelopeddomesticallyonanewprincipleandhasbeensuccessfullyusedinpowerplantssincetheearlyeighties.Duetotheuniquefeaturesofgreatnoisereduction,compactconfiguration,light,stableperformanceandconvenientforinstallation&maintenance,thecomprehensiveperformanceissuperiortotheconventionalsilencerofcompound-impedancetype,themicroporesilencerhasbeenwidelyadoptedbypowerplantsinChina.First,themicroporesilencerissuccessfullyusedinboiler’ssteamblow-off&safetyvalvesteamexhaustduringstart-upfornoisecontrol;laterusedtothenoisecontrolforsteamblow-offofsteampiping

简介：Amathematicalmodelforatmosphericstagedcirculatingfluidizedbedcombustion,whichtakesfluiddynamics,combustion,heattransfer,pollutantsformationandretention,intoaccountwasdevelopedintheinstituteofEngineeringThermophysics(IET)recently.Themodelofgassolidflowatthebottomofthecombustorwastreatedbythetwo-phasetheoryoffluidizedbedandintheupperregionasacore-annulusflowstructure.ThechemicalspeciesCO,CO2,H2,H2O,CH4,O2andN2wereconsideredinthereactionprocess.Themathematicalmodelconsistedofsub-modelesoffluidnamics,coalheterogeneousandgashomogeneouschemicalreactions.heattransfer,particlefragmentationandattrition,massandenergybalancetec.Thedevelopedcodewasappliedtosimulateanoperatingstagedcirculatingfluidizedbedcombustionboilerofearlydesignandtheresultswereingoodagreementwiththeoperatingdata.Themainsubmodelsandsimulationresultsaregiveninthispaoper.

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简介：Theboilerisoneofthekeypartsofpowerstation.Monitoringtheoperationoftheboilerautomatically,continuouslyandaccuratelyisveryimportant.Incaseofmalfunctions,anexpertsystemmightbehelpfultofindthesourcesoffaults,andthereafterwillassisttheoperatortoactcorrectlyandtopreventthefaultfromfurtherdevelopment.Inthispaper,asimulationstudyofanexpertsystem,whichcandiagnosetherunningfaultsofboilersystem,isconducted.Shallowanddeeptwo-layerknowledgebasestructureisusedinthistwolayersofknowledgebase.So.thiskindofexpertsystemcanovercomethedisadvantagesoftheoldtypesofexpertsystems,whichareonlyabletodealwithexperiencerulesbase.Asimulatorofpowerboilerisusedfortheresearchonfaultdiagnoseexpertsystem.Thisboilersimulatorgivesallnecessaryinformationforthediagnosis.Theknowledgebaseofexpertsystemisbuiltinhierarchies,sothespeedofreasoningmaybeinvreased.Afterthereasoningthesys

简介：Accordingto350MWand600MWboilers,underoxygenfuelcondition,throughthereasonablecontroloftheprimaryandsecondaryflowandthecorrectoptionandrevisionofmathematicalmodel,thetemperaturedistribution,heatfluxdistributionandabsorptionheatdistribution,etc.wasobtainedwhichcomparedwiththoseunderaircondition.Throughcalculation,itisobtainedthattheprimaryandsecondaryflowmixedwell,goodtangentiallyfiredcombustioninfurnacewasformed,thetemperatureunderairconditionobviouslyhigherthanthetemperatureunderO26condition.Theadiabaticflametemperatureofwetcyclewasslightlyhigherthanthatofdrycycle.Themaximumheatloadappearedonthewaterwallaroundtheburnerarea.Theheatloadgraduallydecreasedalongthefurnaceheightupanddowninburnerarea.TheheatabsorptioncapacityofthefurnaceunderO26waslowerthanthatundertheaircondition.Theheatabsorptioncapacityoftheplatenheatingsurfaceunder026wasequaltothatunderaircondition.AndtheheatabsorbingcapacityofwaterwallunderO26wasabout7%~12%lessthanthatunderaircondition.

简介：Theeffectofpressureoncombustionandheattransferisanalyzed.Theresearchisbasedonthebasiccombustionandheattransfertheorem.Acorrectionfortheheatcalculationmethodforpressurizedfurnaceismadeonthebasisofthenormalpressurecase.Thecorrectiontakestheeffectofpressurizingintoaccount.Theresultsshowthatthecorrectionisreasonableandthemethodisapplicabletocombustionandheattransferofthemarinesuperchargedboiler.

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简介：OnDecember28,2000,theretrofittingprojectbyusing410t/hCFBCboilerinFengyiPowerPlant,JiangxiProvincewasstartedformally,whichindicatesthattheresearchanddevelopmentofcleancoalcombustiontechnologyinChinahasmadeasignificantbreakthrough.The410t/hCFBCboileradoptedint

简介：关于三个广告的加热表面的热转移的研究300个MWeCFB锅炉在这个工作被进行。加热表面，外部热exchanger(EHE)和气旋隔板的压盘的热转移系数在不同锅炉负担根据相对操作数据被计算。而且，waterwall的热转移系数被CFB锅炉的热电路的热平衡计算。与增加的锅炉能力，这些加热表面增加的热转移系数，和水的热转移系数围比加热表面的压盘的高。EHE的热转移系数在高锅炉负担是最高的，气旋隔板的热转移系数最低。因为开除的煤与在No.1锅炉的设计煤不同，开除的煤的灰内容比设计煤的低得多。与手术数据计算了的热转移系数比以前的设计价值低，那是病床温度在在No.1锅炉的锅炉手术期间相当高的原因。

简介：Withtherevisionofemissionstandards,deepdesulphurizationandDeNOXisneededincirculatingfluidizedbed(CFB)boilers.Theoperationofthefirstsetof300-MWCFBboilerpluslimestone/gypsumwetfluegasdesulphurization(FGD)systemintheworldshowsthatdeepdesulphurizationandDeNOXofCFBboilershashigherSO2removalefficiencyatalowerCa/Sratiocomparedwithtraditionalinnerdesulphurizationmode.Itcanmeettheincreasinglyrigidemissionstandards,andissuitableformorefuels.DeepdesulphurizationandDeNOXcanalsoachieveahighly-efficienthigh-temperatureCFBboilerthatcannotonlyachieveinnerdesulphurizationandlowNOXemission,butbenefitslow-grade,highsulfurcontentfuelsaswell.ResearchofdeepdesulphurizationandDeNOXwillbeadevelopingdirectionforCFBboilers.

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简介：发电厂是非线性、不明确的复杂系统。过热的蒸气温度的可靠控制是必要的在现代发电厂的操作保证高效率和高负担追随者能力。一个非线性的概括预兆的控制器在这篇论文基于neuro模糊的网络(NFGPC)被建议。建议非线性的控制器被使用控制一个200MW发电厂的过热的蒸气温度。从植物和植物的模拟的实验，好一些的性能比传统的控制器被获得。关键词Neuro模糊的网络-概括预兆的控制-过热的蒸气温度这个工作被北京(号码4062030)的自然科学基础支持，中国的国家自然科学基础(号码50576022，69804003)，科学研究教育(KM200611232007)的北京市政的委员会的普通节目。刘祥杰从自动化的研究中心在电、电子的工程收到了博士度，在1997的东北大学。他随后在电力研究院(EPRI)保持了博士后的节目，中国北京，直到1999。自从1999，他是在EPRI的一个副教授。他是香港的大学里的一个研究伙伴，墨西哥的国家大学里的一个教授。他现在是在自动化的部门的一个教授，诺思中国电力大学。他的当前的研究区域包括：在DCS的工业过程，开发和申请的模糊控制，神经网络，适应控制，聪明的控制理论和它的应用程序。刘博士是在第14IFAC世界大会的鈥渁p折襞价格鈥?的一个候选人。刘继珍在1982在中国从诺思中国电力大学(NCEPU)收到了硕士度。他当前是NCEPU的总裁，为电力工程的中国社会的主要委员会成员，自动化的中国协会的一个委员会成员。他的当前的研究区域包括：在热过程和力量砰GUAN的监督信息系统的优化技术从自动控制的部门收到了博士，在2004的北京工学院。她当前是在自动化的部门的副教授，机械的北京研究所。她的当前的研究区域包括：在太空的神经原模糊的网络，适应控制，聪明的控制理论和它的应用程序。

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简介：TheconstructionscaleofPFBC-CCdemonstrationprojectis:toinstalltwosetsofPFBCboilerwithinputpowerof200MWeach,twosetsofimported17MWclassgasturbineandrelevantkeyequipment,andequiponesetofdomesticallymade173.5MWcondensingtypeturbo-generatorunit.Thetotalcapacit

简介：Thecapabilitytoperformfastload-followinghasbeenanimportantissueinthepowerindustry.Anoutputtrackingcontrolsystemofaboiler-turbineunitisdeveloped.Thesystemiscomposedofstableinversionandfeedbackcontroller.Thestableinversionisimplementedasafeedforwardcontrollertoimprovetheload-followingcapability,andthefeedbackcontrollerisutilizedtoguaranteethestabilityandrobustnessofthewholesystem.Loop-shapingH∞methodisusedtodesignthefeedbackcontrollerandthefinalcontrollerisreducedtoamultivariablePIform.Theoutputtrackingcontrolsystemtakesaccountofthemultivariable,nonlinearandcouplingbehaviorofboiler-turbinesystem,andthesimulationtestsshowthatthecontrolsystemworkswellandcanbewidelyapplied.

简介：High-temperaturecorrosionisaseriousproblemforthewater-walltubesofboilersusedinthermalpowerplants.Oxidation,sulfidationandmoltensaltcorrosionaremaincorrosionways.Thereinto,themostseverecorrosionoccursinmoltensaltcorrosionenvironment.Materialsrichinoxidesformers,suchaschromiumandaluminum,areneededtoresistcorrosioninhigh-temperatureandcorrosiveenvironment,butprocessabilityofsuchbulkalloysisverylimited.Highvelocityelectricarcspraying(HVAS)technologyisadoptedtoproducecoatingswithhighcorrosionresistance.Bycomparison,NiCr(Ni-45Cr-4Ti)isrecommendedasapromisingalloycoatingforthewater-walltubes,whichcanevenresistmoltensaltcorrosionattack.Inthestudyofcorrosionmechanism,themodernmaterialanalysismethods,suchasscanningelectronmicroscopy(SEM),X-raydiffractometry(XRD)andenergydispersivespectrometry(EDS),areused.ItisfoundthatthecorrosionresistancesofNiCrandFeCrAIcoatingsaremuchbetterthanthatof20gsteel,thattheNiCrcoatingshavethebestanti-corrosionproperties,andthattheNiCrcoatingshaveslightlylowerporesthanFeCrAIcoatings.Itistestifiedthatcorrosionresistanceofcoatingsismainlydeterminedbychromiumcontent,andthemicrostructureofacoatingisasimportantasthechemicalcompositionofthematerial.Inaddition,thefracturemechanismsofcoatingsinthecycleofheatingandcoolingareputforward.Thedifferenceofthethermalphysicalpropertiesbetweencoatingsandbasemetalsresultsinthethermalstressinsidethecoatings.Consequently,thecoatingsspallfromthebasemetal.

简介：Sincethefirstbatchof350-MWsupercriticalutilityboilerswasputintooperation,theexhaustfluegastemperatureoftheboilershasalwaysbeenhigherthanthedesignedvalue.Themainreasonisthattheheatabsorbedbytheairheaterisnotsufficient.InHuanengDongfangPowerPlant,theexhaustfluegastemperatureisloweredthroughmodificationstotheeconomizerandtheairheater.Theexperimentalresultsrevealthateveryyear,eachboilercouldsave3850tonsofstandardcoalandreduce85tonsofSO2and9000tonsofCO2respectivelyafterretrofit.

简介：Thecombustionperformanceoftheboilerlargelydependsonthecoaltype.Lotsofexperimentalresearchshowsthatdifferentfuelshavedifferentcombustioncharacteristics.ItisobviousthatfuelwillchangethewholeoperatingperformanceofCirculatingFluidizedBedCombustion(CFBC).Weknoweveninapilot-scalerunningboiler,themeasurementofsomeparametersisdifficultandcostly.Therefore,wedevelopedthewayofsimulationtoevaluatethecombustionperformanceofChinesecoalsinCFB,Thesimulationresultsshowthat,differentcoalswillresultindifferentcoalparticlediameterandcominutiondependingontheirmineralcomponentandthechangewillaffectthedistributionofashinCFBCsystem.Inaword.thecomputationalresultsareinaccordancewithexperimentalresultsqualitativelybuttherearesomedifferencesquantitatively.

简介：InwallshotblastingisamethodofimprovingthesurfacehardnessandhightemperatureoxidationresistanceoftheS30432high-pressureboilertube.Thedifferencesonresidualstress,sub-grainsize,micro-hardnessandstructurebetweentheS30432inwallshot-blastingtubeproducedbyBaosteelwithsixtechnologicalprocessparametersandtheimportedsuper304Hwerestudiedsystematicallybycontrasttestresearch.IthasbeendemonstratedthattheS30432obtainsahigherresidualstress,adeeperdistributed...

简介：Oneofthepathwaysforachievingthegoalofincreasingtheefficiencyofcoal-firedpowerplantsandreducingtheemissionofpollutantsandCO2isbyimprovingthesteamtemperatureandpressure.Buttheincreaseofsteamparametersdependonthedevelopmentofnewhigh-temperaturemetalmaterials.ThispaperpresentedtheconstructivesuggestionsoncriticalmaterialsselectionforChina’snewgenerationof700℃cleanandhigh-efficiencycoal-firedboilerbysummarizingtheresearchanddevelopmentsituationofcriticalmaterialsforcoal-firedboilersoperatingat700℃/35MPaoftheEurope,JapanandUSA.