哈尔滨绍和水厂自控系统改造及运行效果分析

工程硕士学位论文哈尔滨绍和水厂自控系统改造及运行效果分析HARBINSAURWATERSUPPLYCO.AUTONOMOUSSYSTEMOFWATERWORK’SRECONSTRUCTIONANDANALYSISOFRUNNINGEFFECTION裴宁哈尔滨工业大学2008年7月国内图书分类号：TU991.41国际图书分类号：628.1工程硕士学位论文哈尔滨绍和水厂自控系统改造及运行效果分析硕士研究生：裴宁导师：崔福义教授申请学位：工程硕士学科、专业：环境工程所在单位：哈尔滨绍和供水有限公司答辩日期：2008年7月授予学位单位：哈尔滨工业大学ClassifiedIndex:TU991.41U.D.C.:628.1DissertationfortheMasterDegreeinEngineeringHARBINSAURWATERSUPPLYCO.AUTONOMOUSSYSTEMOFWATERWORK’SRECONSTRUCTIONANDANALYSISOFRUNNINGEFFECTIONCandidate：PeiNingSupervisor：Prof.CuiFuyiAcademicDegreeAppliedfor：MasterofEngineeringSpeciality：EnvironmentEngineeringAffiliation：HarbinSAURWaterSupplyCO.DateofDefence：July,2008Degree-Conferring-Institution：HarbinInstituteofTechnology哈尔滨工业大学工程硕士学位论文摘要现代自来水厂自动化控制系统主要有水质检测技术、水处理控制技术、变节能技术与综合自动化系统四个方面。论文在结合实际工程的基础上，主要研了其中的水处理控制技术的自动化系统和综合自动化系统。水处理控制技术是保证供水水质的关键，主要包括药剂的投加和滤池的反洗。本文在分析研究原有μXL自动化控制系统的基础上，提出了相应的改造方案。一是提出综合原水水量，人工确定单耗的情况下药剂投加的控制方案。该方案据源水流量和浊度来控制计量泵的冲程。另一种是根据流动电流检测仪反馈电流与设定的偏差来控制计量泵的频率，同时根据水流量的变化确定不同区间的设定值，进一步优化混凝剂的投加。该方案结合了原水流量和取水水质的变化，投加量的变化，具有控制精度高、稳定速度快的特点，在一定程度上解决了稳定性与控制精度的矛盾。还可以克服在线仪器测不是很稳定的缺点。结合绍和水厂工程实际，作者还着重考虑了水厂反应沉淀池搅拌浆与刮泥机的自动运行和滤池反冲洗流程与恒水位运行的自动控制。供水综合自动化系统是随着现代网络技术而不断发展的。现代化水厂不仅是一个独立的个体，还要与外界共享水厂信息，便于上级部门的管理和监控。也为了实现管控一体化的目标，重新考虑设计了供水系统的一个网络架构，并结合现有办公EtherNet网络相结合，并设计了远程数据采集终端。通过以上改造，实现了净水厂生产和管理的自动化运行。并且在生产中经过2年的实际运行，硬件设备、系统软件和操作人员都经受住了各种的考验，并且进一步的摸索出了更好的管理经验和方法。使水厂的生产运行得到了进一步优化，水厂的管理水平再上了一个新台阶。关键词水厂自动化；PLC+PC系统；DCS系统；自动投药系统-I-哈尔滨工业大学工程硕士学位论文AbstractControlmethodbefore,whichincludesonlytheflowofwater.Thatprojectcontrolsthebluntdistanceofmeteringpumpaccordingtothesourcewatercurrentquantityandmuddydegrees,controlsthefrequencyofmeteringpumpaccordingtothedeviationoftheinitialvaluesandfeedbackcurrentofthestreamingcurrentmonitor.Thatprojectcombinestotaketheamountofwatercurrentandtakethewaterinterferenceofthemuddydegreetomovethevariety,thenthehurladdstheinterferenceofthequantitytomovethevariety,combiningatthesametimeinclinedtakecareofadeviation,havetheaccuracyofcontrolhigh,stabilizethequickcharacteristicsofspeed,solvedtheantinomyofthestabilityandthecontrolaccuracytosomeextent.Canalsoovercometheonlineinstrumentdiagraphisnotasettledweakness.Thesecondisaddedthechlorinetodesignthefeedbacktothewaterfactoryfilterstringclassofcontrolproject,shouldcontroltheprojecttoaddthechlorinestandardaftercanadjustthefilterautomatically,neednottheartificialintervention,lowertheinfluenceoftheartificialerrormargin,carryouttherealautomation.Frequencyconversiontechniqueisthekeythatthefactoryofwaterlowerstheelectricitytoconsume.Comprehensiveanalysisofthispaperchangetheeconomyenergyoffrequencyandchangethefrequencyprincipleofthesoftstartcircularly,andchangedtopresstochangethequantityandconstantlytopresstochangethequantitytocarryontheresearchtowardschangingtheeconomyenergyoffrequencytwokindsoftocarryouttheway.Theconstantpressestochangethequantitywatersupplymethodaccordingtothevarietyofafactorywaterpressuredint,passingthecontrollerofμXLtoregulatetochangethemachineoffrequency，tousethefactorywaterconstantpressuretosettle.Changetopresstochangetomeasurethewaythenaccordingtothepressureofafactorywaterandsendtheamountofwatertoregulatetochangethemachineoffrequencytoturnsoonandfrequency,tousethefactorywaterpressuredintalongwithsendthevarietybutvarietiesoftheamountofwater,economizedtheelectricitytoconsumeonthelargerdegree,isakindofbettereconomyenergyproject.Deducedtochangetopresstheengineeringformulaof-II-哈尔滨工业大学工程硕士学位论文changethequantitywatersupplymethodatthesametime,thatformulacanthrowinconvenientlyphysicallyintheengineering,canobtaintocomparegoodofeconomyenergyresult.Supplywaterthecomprehensiveautomationdevelopscontinuouslywiththemodernnetworktechnique.Themodernfactoryofwaternotonlyisanindependentindividualonly,butalsowanttosharethewaterfactoryinformationwiththeexternalworld,themanagementandthesupervisionoftheeasytoanduppergradesectionForcarryingoutthetargetthatthecontrolintegralwholeturn,designtosupplywateranetworkstructureofthesystem,andcombinedthetodesignthelongrangedatatocollecttheterminal.CombinetheSaurwaterfactoryengineering，designedthewaterfactoryfilterpondanti-flushtheprocessandthenonlevelpressureandvariancewatersupplyingsystemReturntosuperviseandcontrolthesystemtocarryontheintroductiontowardssupervisingandcontrolthesoftwareIntouchandtheplaceofhonormachinesatthesametime.Keywordstomationofwaterworks；DCSsystem；PLC+PCsystems；Alumdosingsystem-III-哈尔滨工业大学工程硕士学位论文-IV-目录摘要·························································································IAbstract·························································································II第1章绪论················································································11.1课题背景··············································································11.2自动系统在水厂的应用及国内外发展现状····································11.2.1水厂自控系统的组成··························································11.2.2水厂自控系统的主要内容及国内外发展···································21.3水厂自动化发展趋势·······························································51.3.1控制系统