环缝洗涤塔说明书2801956D050TANGSHANBF2CHINENG新.docx
《环缝洗涤塔说明书2801956D050TANGSHANBF2CHINENG新.docx》由会员分享，可在线阅读，更多相关《环缝洗涤塔说明书2801956D050TANGSHANBF2CHINENG新.docx（100页珍藏版）》请在冰点文库上搜索。
环缝洗涤塔说明书2801956D050TANGSHANBF2CHINENG新
TANGSHANIRON&STEELCO
BlastFurnaceNo2Revamping
GASCLEANINGSYSTEM
SCRUBBERANDDEMISTER
OPERATION&MAINTENANCEMANUAL
0
Firstbilingualversion
22.05.2005
CLASSEN
WOLSFELD
DAVIDI/EGNER
Rev.No.
DescriptionofRevision
Date
Prepared
Checked
Approved
TitleofDocument/Designation:
DrawingNumber:
2801956-D050_CHIN_ENGL.doc
2801956-D050
OrderNumber:
ReferenceDocuments:
2801956
∙2801956-0001P&Idiagram
唐山钢铁有限公司
2号高炉
煤气净化系统
洗涤器和脱水器
操作、维护手册
0
双语第一版
22.05.2005
CLASSEN
WOLSFELD
DAVIDI/EGNER
版本号
版本修改说明
日期
编写
审核
审批
文件名称:
图号:
2801956-D050_CHINESE_xxx.doc
2801956-D050
订货号:
参考文件:
2801956
∙2801956-0001P&I图
1Preface
WhenstartingoperationforGasCleaningPlants（GCP）theinstructionsofthisoperationalHandbookshallbefollowedfromthefirstdayoninordertoavoidunsafeoperation,damagesorundulywearofcomponents.
Besidethenormaloperationtwostart-upsituationswillbeexplained:
Recommissioningafterlongtimeshutdown
Startupaftershortoutage
Forefficientoperationtheinstructionsforstartupsituationsaswellasthemaintenanceobligationsforallcomponentsmustbefollowed.
2FunctionalDescriptionandProcessData
Pre-ScrubberandAnnularGapScrubber
TheBFgasstreamcomingfromthedrygascleaningentersthescrubberfromthetop.Thegasentersthesprayingzoneofthescrubberandpassesthroughthewatercurtainsemittedbytheinjectingnozzles.Thecoarsedustparticlescontainedinthegasstreamareembeddedinthewaterdropletsproducedbythespraynozzles.Thedustladenwaterdropletsarecollectedinthesumpofthesprayingchamberanddischargedtothewatertreatmentplant.
Afterhavingpassedthewatercurtains,thegasispre-cleaned.Acertainamountofthepre-cleanedgascanbeusedforpressurizingofthehopperofthebell-lesstop.
ThekeypartsoftheANNULARGAPSCRUBBERarethePAULWURTHAnnularGapElements.
ATTENTION:
Inordertoachieveanoptimumcleaningefficiencyandminimumofwearitisextremelyimportantthatthedistributionofthegasflowthroughtheannulargapelementhastobeexactlyevenandsymmetric.
Downstreamthesprayingchamber,thegasflowsthroughtheannulargappassage.Here,waterisinjectedontopoftheannulargapelementsbeforethegasflowsthroughtheannulargap.Whenenteringtheannulargapthegasflowisaccelerated.Thehighgasvelocityproducesstrongturbulence,sothatthegasismixedwiththeinjectedwater.Duringthismixing,evenverysmalldustparticlesareembededbythewaterdropletsandremovedfromthegas.PleasealsorefertoFig1below.
Figure1:
Ife.g.thegasstreamisinterruptedduetocloggingofdust,itisobviousthatthewaterfilmontheconeisnotevenlydistributedonthecircumference.Theflowofthegaswillthereforealsonotbedistributedproperlyandhighwearoftheconeisunavoidable.ThisresultsinachangingL/Gratio（massflowofwatertomassflowofgas）overthecircumferenceoftheannulargap.
TheL/Gratiofortheoptimizedcleaningefficiencyis1;i.e.1lofwaterhastobeinjectedper1Nm3ofgas.InthecaseofmisalignmentbetweentheconeandtheventuritheL/Gratiowillbelowerthan1atlocationswithhighergapwidthandhigherthan1atlocationswithlowergapwidthandtheperformanceofthegascleaningplantwouldgetworse
Thedust-ladenwateriscollectedintheannulargapzonesumpandflowstothedemistersump.Fromthereitisrecycledtothespraynozzlesatthetopofthescrubberviarecirculationpumps.Thecleangasthatmaystillcontainfreewaterdropletsleavesthescrubberindirectionofthedemister.
TheDemister
Thegasentersthedemisterfromtop.Theverticaldemisterensurestheoptimizedseparationanddroplets,whichareseparatedatthedemistershell,arenotre-enteringthegasstream.
Thegaspassesthroughvanesthatgivethegasstreamanangularmomentum.Centrifugalforcesmovethewaterdropletscontainedinthegasstreamtothewall.Herethewateriscollectedattheendofthedemisterandflowsdownintothesumpfromwhereitisdrainedtotherecirculationmain.
PlantProcessData
1
BFdata
Usefulvolume:
2000
m3
Normaltoppressure:
2
bar,g
Maxdesignpressure:
2,2
bar,g
Mintopgasflowrate:
220000
Nm3/h
Normaltopgasflowrate:
330000
Nm3/h
Max.topgasflowrate:
350000
Nm3/h
Normaltopgastemperature:
250
°C
Maxtopgastemperature
400
°C
Averageparticledensity
1500
Kg/m3
Topgasdustcontent
15
g/Nm3
MoisturecontentofBFgas:
30
g/Nm3
-
Gasanalysis
CO
22,5
vol%
CO2
19
vol%
H2
0,5
vol%
N2
56
vol%
Belowfiguresarebasedonnormalgasinlettemperature,pressureandflowrate
2
AnnularGapScrubber
Waterflowratesandwaterconditions
Totalclarifiedwaterrequirement
500
m3/h
Recirculationflowrate
330
m3/h
Inletconditionswater
Clarifiedwaterinlettemperature
20
°C
Suspendedsolids
<100
mg/l
Hardness（CaCO3）
<1000
mg/l
Chloridecontent
<400
mg/l
Inlet/Outletconditionscyclone
Dustcontentatcycloneinlet
<15
g/Nm3
Dustcontentatcycloneoutlet
<2,25
g/Nm3
3
VerticalDemister
Dustcontentatnormaloperationpressure
5
mg/Nm3
DemisteroutletpressurewithTRTinoperation
1,86
bar,g
Cleangaspressure
0,1
bar,g
Cleaningefficiency
85-90
%
Cleangastemperature
<40
°C
4
GasCleaningPlantGeneralConditions
Noise（TRTnotinoperation）ofannulargapscrubberandverticaldemister1 moutsidegascleaningplant.
-
dB（A）
BFtoppressurecontrolaccuracyifTRTisnotinoperationandannulargapelementscontrollingthetoppressure.
-
kPa
3Inspection,PressurizingandAdjustment
Forthestart-upofgascleaningplantthefollowingpointshavetobecheckedandrecorded:
∙Foreignpartsintheplant,forinstancemetal-wooden-,plasticmaterial,glasspartsaswellasscrews,wires,bottles,cans,insulatingmaterial,tools,scaffoldetc.havetoberemoved
∙Thepipeworkmustbeflushedandthecleanedfromforeignparts
∙Mudagglomerationordustdepositshavetoberemoved
∙Allmanholes,openingsandinspectionholesmustbeclosedandgastight
∙Thegreasingsystemmustbereadyforoperationandthestuffingboxesoftherodsmustbecheckedfortightness
∙Theshut-offdevicesonthedischargesideofthepumpmustbeclosed
∙Thehydraulicandelectricactuatedwatervalvesmustbecheckedandreadyforoperation
∙Allprimaryshut-offvalvesandotherfittingstomeasurementandinstrumentationmustbeopened
∙Allpumpsmustbereadyforoperation
∙Allmeasuring-,control-andregulationinstrumentsmustbecheckedandreadyforoperation
∙Allrequiredutilitiesandconsumables,likewater,grease,lubricants,nitrogen,steametcmustbeavailableforfillingin
∙Theinertgasconnectionmustbereadyforoperation
4SafetyRequirements
Forsafetyreasonsthesiteshouldbeincleancondition.StairwaysplatformsanddirectsurroundingoftheGasCleaningPlantshallbeclearandscaffoldingandhoistingequipmentshouldberemoved.
TheinsideofthescrubberbottomaswellasallstairwaysplatformsandsurroundingareasoftheGCPneedtobeilluminatedbysufficientlighting.
5Re-CommissioningafterLongTimeShutDown
Afterthemeasuresrequiredunderchapter5havebecarriedoutandtherequirementsforcommissioningofallplantpartsaccordingtotheinstructionsofthemanufacturerarefulfilled,theentireplantcanbeputtingintooperationasdescribedbelow.
Thesafetytechnicalregulationtotheindividualplantcomponentshavetobeconsidered.Toavoidexplosivegasmixturethegas-bearingcomponentsaretobepurgedoxygen-free.Asinertgasisnitrogenorsteamrequired.Theblanketingoftheplantisrequiredbeforefirstcommissioningatleastandalwayswhentheplantforwalkwaysorinspectionismadegas-free.
Theentireplanthastobeputintooperationasfollows:
∙Hydraulicsystem
∙Measuringandcontroldevices
∙Watercyclesystem
∙Gascleaningsystem
RotationControl
Incaseofreplacementofrotatingequipmentarotationtesthastobedonebeforere-commissioning.
Pumpsorotherrotatingequipmentshallbecheckedforrotationdirectionofmotorresp.impeller.Thisistoavoiddamagesandpropercoolingiswarranted.
Thehydraulicpumpsshallbeswitchedononlyforashorttimetopreventdamagesincaseofwrongrotation.
Forwaterpumpsthepumpmanualshallbecheckedtofindoutifitisrequiredbythemanufacturertodisconnectthecouplingtoseparatemotorfromtheimpeller.
Thepumpmanualhastobecheckedinanycaseforadditionaladvisesandfurthermanufacturerdemands.Forinstanceafewgreasingpumpshaveoptionalrotationdirectionbutwithregardtothegeartoothsystemrightrotationisrecommended.
FillingofMedia
Asfaraspipingorcomponentshasbeenrenewedthepipingsystemshouldbeinspectedfortightnessofallflangeconnections.Allpipesshouldhavebeencleanedfromdebrisandflushedbywaterorchemicalsincaseofstainlesssteelmaterialtobepickled.Apressuretestwithwater（oroilincaseofhydraulicpipes）fornewpipesectionsshouldhavebeendonewithallwaterastestmediumdrained.Afterthesetestproceduresmediacanbefilledt
升级会员 