Air preheater /GGH
QiXing Electric Power provides the electric power market with the whole set of qualified air preheater and GGH. We have experience of many years of and advanced technology on pressure type shearing of heat exchanger components, enamel coating process and enamel firing process, which have always been appraised by our customers.
Usage maintenance
Airpreheaterheattransfercomponents,installation,use,maintenanceinstructions Hoistingcomponents:Qixingpowersupplyheatexchangercomponentsaregenerallytwokindsofmaterials,oneforthelow-carbonsteelheatexchangercomponents,componentthicknessbetween0.5~0.6mm,usedinthehotend;theotherfortheenamelheatexchangercomponentscoatedAfterthethicknessof1.15~1.2mm,usedinthecoldside.Becausetheheattransfercomponentsarerolledbythesheet,inthetransport,liftingtheendofthecomponentmustbeavoideddamage,otherwise,willcausethedeformationofcomponents,enamelsheddingandotherissues,thegeneralFoundationwillprovideadedicatedspreader,Tolifttheheattransferelementcartridge.Prohibitedtheuseofordinarycarbonsteelspreadermade!.Duetofatigueresistanceofcarbonsteelispoor,pronetodecoupling,fracture,etc.,willcauseagreatsecurityaccident! HeattransfercomponentsTransportationStorage:Heattransfercomponentsintheloadingandtransportationprocessmustbeputneatlycode,andtietheprotectiverope,coveredwithraincloth,beforeunloadingthecar,therainandraintoshaketothecar,forbiddenshakingscatteredonthecomponents.Thesiteoftheheatexchangecomponentsmustbefreeofwater,debris,andotherplacesthanthecementplains,andwitharainclothtoprotect,prohibitloadingandunloadingintherainydayheatexchangercomponents,otherwiseitwillcausecorrosion. Heatexchangerinstallationprotection:Intheinstallation,avoidtouchingthesteelcolumn,electrichoisthook,guidechainandothermetalobjectsinthehoistinggrid,acertainsupporttocheckthesolidsteel,andcleanupweldingslag,scrapandotherdebris,Whenthecomponentstransferredtothegrid,onebyoneplacedasbestosblanket,theendofthecomponentstobeprotectedtopreventthenextinstallationprocessdamagetothecomponents! ComponentfoulingCorrosioncontrol:Theactualcombustionoftheboileralmostallthefuelcontainssulfur,theboilercombustionprocesswillbe2to6%ofthesulfurdioxideintosulfurtrioxide,andfluegasinthewaterreaction,denitrificationammoniaescapereactionofammoniasulfateformation,Inthecold-sideheattransferelementsurfacewillformastickywetcorrosive,inadditiontothefluegasinthefluegasandcatalystintheprocessofblowingtheparticles,fragmentsandotherdamage,andthuscontinuetocorrosionheatexchangercomponents,pluggingHeattransferchannel,resultinginpoorheattransferheatexchangercomponents,shortlife,largepressureandotherissues.SO2/SO3conversionisnotmorethan1%(molarratio);toavoidtheairpreheaterinthecontroloftherateoftheescapeofammoniainthegeneralcontrolof2.3mg/m3;The"coldjunctiontemperature"(fluegasoutlettemperature+airinlettemperature)isbelowtherecommendedminimumvalueforlongperiodsofoperation.Avoidingwaterleakagefromtheeconomizerorheaterfailureincreasesthedewpointofthefluegas,Roadleakageshouldbepromptlyrepaired. Firepreventionmeasures:Intheignition,low-loadoperation,poorcombustionconditions,theincompletecombustionofcoal,andignitionoilparcelswillappearsecondarycombustion,andthusmustpreventthesurfaceofthefuelelementoftheheattransferelementdeposition,otherwiseitwillcauseairpre-Firesituation.Theairpreheaterrotormustbekeptrotating;keepblowingsootregularlytoensurethattheheatexchangersurfaceclean;paycloseattentiontotheairpreheaterandairtemperature,whenthetemperatureanomaliesoccur,Shouldbepromptlyinvestigatedandeliminated;intheeventofsecondaryignition,mustkeeptheblower,induceddraftfan,sootblower,lowpressurewaterinanormalstate;firemonitoringsystemshouldbemaintainedinnormalworkingcondition. Checkbeforeandafterrunning:1,checkandthoroughlycleantheupperpartoftheairpre-heater,theflueinsidethetemporarypedal,scrap,support,etc.;2,checkthesootblowerbarrelbracketweldingissolid,reliable,ifnecessary,tostrengthenmeasurestopreventsootstentoffstuckrotor;3,usingthehandleplaterotor2lapstoseewhetherthefreerotation;4,checkthehigh-pressurewater,steampipes,valvesarenormal,soakedsteampipedrainageisnormal,sootvalvebeforethepressureandsuperheatisnormal;5,checktheradial,circumferential,axialsealinggap,sealingplateboltsarenormal;6,checktherotortopandbottombearings,gearboxoillubricationoilleveltomeettherequirements;7,checktheairpreheaterimportandexportbafflehasbeenclosed;8,checkthefiremonitoringdevice,checkthelocalcabinettoensureitsnormalwork;9,checktoensurethattherotorstallalarmdeviceisworkingproperly;10,checktheairpreheaterreducer,upperandlowerbearingrunningsoundisnormal;11,checkthedrivemotorcurrentisnormal;12,checktheairpreheaterair,smokeimportandexportoftemperatureisnormal. Heatexchangeelementsoot-blowing:1,theairpreheaternormaloperationafterblowingonceevery8hours,andinstrictaccordancewiththesootblowerinstructionsthatensurethattheairpreheaterresistancetomaintaintheoperatingvaluewithinthedesignvalue,beforetheshutdown,intheboilerstartupprocessandSootblowingmustbeintensifiedduringthelowloadstage.2,inordertoavoidcondensationonthesurfaceoftheheatexchangeelement,thesteamshouldbesoothedwhenthetemperatureoftheheatexchangeelementishigh,sothesootblowingshouldbeselectedundertheconditionthattheunitreachesacertainload.3,inordertoensurethatthesootblowingeffect,topreventalltheexternalwaterintotheairpreheater,payattentiontotheselectionofacertainpressureandtemperatu
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E-mail：zhongnengjiye@163.com Add：North Industrial Park, Hengshui City, Hebei Province
Hengshui Qixing Electric Technology Co., Ltd 冀ICP备08004088号-1 Powerded by 300.cn
