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ID:52288967
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页数:5页
时间:2020-03-26
《一氧化碳压缩机技术资料翻译.pdf》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、PROJECTNAME:WANHUADocNo.C-013-915Rev.0PROJECTNUMBER:51-3461-00Page1of5COCOMPRESSORSTARTUP,CONTROL&SHUTDOWNINTERFACESTRATEGYCOVERPAGERevDatePreparedbyApprovedbyRevisiona006/12/2011BPBPForconstructionALEProjectNumber51-3461-00ProjectNameNINGBOWANHUAPOLYURETHANESCO.LTD.TableofRevisionsSection
2、DescriptionThisdocumentisissuedandadministeredbytheAirLiquideEngineeringStandardsDepartment.Papercopiesofthisdocumentareconsideredtobe“uncontrolled”andusersshouldalwayscheckforthemostrecentrevision.PROJECTNAME:WANHUADocNo.C-013-915Rev.0PROJECTNUMBER:51-3461-00Page2of5COCOMPRESSORSTARTUP,CO
3、NTROL&SHUTDOWNINTERFACESTRATEGYREADYTOSTARTThe‘ReadytoStart’ofCOcompressorisconfiguredincompressorPLC.CommonTripstatusof2outof3loopsissentfromSGStoPLC,whichistakenintoaccountforreadytostart.STARTUPTheCOcompressorcouldbestartedeither:FromCompressorremotepanelFromsite(localpushbuttonpanel)
4、Thenthe‘Start’commandissenttoelectricalroomviaSGS.RunningfeedbackfromelectricalroomissenttoSGStocheckdiscrepancybetween‘ON’commandand‘Status’ofthemotor.ThisinformationisthensenttoPLC.PowerconsumptionisdirectlysentfromelectricalroomtoPLCNORMALOPERATIONst1StageSuctionpressure:stVaporisationp
5、ressureofliquidCOinthermo-siphonisadjustedby1stagesuctionpressure.IfthepressureishigherthencorrespondingtemperatureinColdboxishigherandwouldaffectcoldbalance&COrecovery.stndForstableoperationoftheColdBoxitisnecessarytomaintainstablecompressor1&2stagesuctionstpressures.DCSwillcontrolthispre
6、ssureviaPIC11482(1stagesuctionpressure)andwillsendanoutputtoPLC.PLCwillsendsignalviaalowselectortoinletguidevanesonsite.nd2StageSuctionpressure:ndCO/CH4columnpressureisadjustedby2stagesuctionpressure.Ifthepressureishigherthencorrespondingheatduty(reboilerduty)requiredtoproduceCOishigher.nd
7、ForstableoperationoftheColdBoxitisnecessarytomaintainstablecompressor2stagesuctionndpressures.DCSwillcontrolthispressureviaPIC16706A(2stagesuctionpressure)andwillsendanoutputtoPLC.PLCwillsendsignalviaalowselectortoinletguidevanesonsite.SHUTDOWNThetripcondition
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