DCS论文

1洗化厂DCS改造方案摘要洗化厂生产系统存在能耗高、工艺指标波动大、自控仪表落后、自控水平低等问题，如不进行必要的技术改造，在操作工频繁手动操作的情况下，会造成高投入、低产出且系统波动大的后果，进而影响整个联碱系统的稳定高产。本文运用计算机及网络的先进技术，结合洗化厂老生产系统存在的问题，采用集散控制系统对生产系统进行下列技术改造:本文完成了以下主要工作:首先在阅读了大量文献资料的基础上，介绍了火电厂烟气脱硫的主要方法，以及DCS的发展状况;通过对本厂装置原有DCS系统的分析，提出了对DCS改造的要求;介绍了拟选择DCS的特点;改造了洗化厂生产系统的连锁紧急停车系统其次为实现上述技术方案，控制算法、图形、系统管理、引用和报表组态，确定了仪表及材料的选型，完成了改造的工程预算工作。最后通过分析以及现场实验和实际运行情况，证明:通过DCS系统的改造提高了系统安全可靠性，解决了由于无备件给生产构成的威胁。同时，改造后的DCS对系统控制参数的变化反应更快，系统重新建立平衡的时间更短。系统可靠性和稳定性均得到提高。关键词：集散控制系统，节能控制系统，DCS组态，控制算法。2AbstractWashingplantoftheexistenceofhighenergyconsumptionandproductionsystems,processindicatorsoffluctuationsinlarge,backward-controlledinstrument,sinceLowlevelcontrolproblems,suchasthenecessarytechnologyisnotinfrequentmanualoperatives,theresultinhighinput,lowoutputandtheconsequencesoflargefluctuationsinthesystem,therebyaffectingtheentireUnionhighalkalinestabilityofthissystem.Inthispaper,theuseofcomputersandnetworks,advancedtechnology,combinedwithwashingofplantproductionsystemsexistintheoldtitle,theuseofdistributedcontrolsystemfortechnologicaltransformationofproductionsystemstocarryoutthefollowing:Thisarticlewascompletedthefollowingmajortasks:ThefirstafterreadingalotofliteratureonthebasisoftheintroducedthermalpowerplantfluegasdesulphurizationofthemainwaystoandthedevelopmentofDCS;FactoryinstalledontheDCSsystemintheoriginalanalysis,putforwardtherequesttotheDCStransformation;introducedtoselectthecharacteristicsofDCS;ThetransformationofthewashingsystemoffactoryproductionchainEmergencyShutdownSystemSomeofthepracticaloperationcurve.Thesecondtechnologyfortherealizationoftheabove-mentionedprograms,controlalgorithms,graphics,systemmanagement,configurationreferencesandstatementstodeterminetheselectionofinstrumentsandmaterialstocompletethetransformation3oftheworkoftheprojectbudget.scenethroughanalysisandexperimentsandtheactualoperationofthat:thetransformationthroughtheDCSsystemtoimprove.Endsecurityandreliabilityofthesystemtoaddressalackofsparepartstothethreatposedbytheproduction.Atthesametime,transformedtheDCSControlparametersofthesystemchangesinresponsetofaster,thesystemretablishbalanceinashortertime.Systemreliabilityandstabilitycouldbeenhanced.Keywords:distributedcontrolsystem,energy-savingcontrolsystem,DCSconfiguration,controlalgorithm.4目录摘要.....................................................................................................................................................1Abstract...............................................................................................................................................21前言................................................................61.1集散控制系统的发展历史........................................61.2集散控制系的基本结构..........................................81.3分散过程控制装置..............................................91.4操作管理装置.................................................101.5通信系统.....................................................102生产分厂和动力分厂自动控制现状....................................122.1生产分厂DCS系统的现状.......................................122.1动力分厂自动控制系统的现状...................................142.3DCS系统改造原则..............................................142.4硬件配置原则：...............................................153生产系统改造技术方案...............................................163.1生产预测控制系统.............................................163.2预测模型.....................................................163.3反馈校正.....................................................183.4参考轨迹.....................................................193.5最优控制律计算...............................................193.6控制方案确定.................................................193.6预测模型测试.................................................213.7联锁停车系统.................................................213.8仪表的更换及增加.............................................234DCS的选型及组态...................................................244.1DCS的选型....................................................244.2系统配置.....................................................244.3HS2000一Plus集散控制系统的结构..............................254.4现场控制站...................................................264.5操作员站.....................................................284.6工程师站.....................................................284.7历史站.......................................................294.8系统的三层网络结构...........................................295系统的组态.........................................................305.1数据库组态...................................................305.2控制算法组态.................................................3555.3图形组态.....................................................375.4系统管理组态.................................................385.5引用组态及报表组态...........................................386小结...............................................................40参考文献............................................................41致谢................................................................4261前言1.1集散控制系统的发展历史集散控制系统是1975年由美国霍尼威尔(HOne犷well)公司推出的。由于当时采用模拟电动仪表控制系统或计算机直接控制都无法解决过程工业控