简介:摘要:锅炉装置在化工企业必不可少,它的作用是将燃料的化学能转变为热能,并利用热能加热锅内的除盐水使之成为具有高温和高压的过热蒸汽,供后续装置使用。锅炉炉膛安全监视系统包括锅炉燃烧器控制系统和燃料安全系统,采用的是美国艾默生过程控制公司的Delta V控制系统,实现了锅炉装置的安全运行。Delta V控制系统诊断程序(Delta V Diagnostics)可以显示Delta V控制网络中每个节点和子系统的全面状态以及详细的整体信息,通过诊断程序,及早发现系统硬件故障,按应急预案有序处理,避免锅炉装置紧急非计划停车,影响后续装置的正常运行。
简介:ThispaperdealswiththedevelopmentandevolutionofmodemYellowRiverdeltaandtheerosionordepositionratesofitsdifferentsections.InJune,1996,YellowRiversterminalcoursewasartificiallyturnedeastwardstoemptyintotheseaandthenthe11thlobeofthemodernYellowRiverdeltabegantoform.Thiscoursechangemaymarkthebeginningofthe3rdsubdeltaformation.Asaresultofthat,theYellowRiverdeltaadvancestowardseastbynorthwiththe1st,2ndand3rdsubdeltasarrangedinsuccession.Coastzoneinthedeltaicareaisdividedinto7differentsectionsaccordingtotheirdifferenterosionordepositionrates:therelativelystablesectionfromDakouRivertoShunjiangStream,theweaklyretreatingsectionfromShunjiangStreamtotheTiaoheRivermouth,thestronglyretreatingsectionfromtheTiaoheRivermouthtothestation106,theartificiallystablesectionduetostonedamprotectionfromthestation106toGudongOilfield,thestrongdepositionsectionfromGudongOilfieldtoDawenliuHaipu,theweaklydepositionsectionfromDawenliuHaiputotheZimaiStreammouth,andthestablesectionfromtheZimaiStreammouthtotheJiaolaiRivermouth.Itispredictedthattheerosionanddepositionsituationsofthesectionswillnearlyremainthesamein10years,buttheretreatingandsilting-uprateswilltendtobecomeslowergradually.Humanactivitieshaveanevidentinfluenceonthechangesofthecoastline.
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