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摘要摘要课题主要通过PLC程序仿真对制药废水处理自动化控制，程序具备手动/自动控制功能，实现对提升泵，风机房空压机的变频工频控制，对加药泵，污泥回流泵的智能控制，自动控制过程中，主要是采集DO仪检测仪变送回开关量信号，液位仪变送回开关量信号，PH检测仪开关量信号，实现对空压机、提升泵、加药泵（NaOH）自动控制、空压机运行过程中，通过PLC时间控制程序实现对空压机时间的切换。设计中完成了配电系统设计，PLC控制电路的设计，PLC控制程序的设计，并进行了程序仿真，通过仿真实现了预期的控制要求。PLC提高了自动控制的可靠性,不仅减轻了工人的劳动强度,而且提高了制药污水处理的运行效率,实现了污水厂生产管理的科学性。不但使制药公司的污水得到了达标排放，而且一部分污水能得到了循环利用。关键词:废水处理；自动化控制；PLC控制AbstractAbstractThetopicmainlyusesPLCsimulationproceduretoautomaticcontrolpharmaceuticalwastewatertreatment,procedureshavemanual/automaticcontrolfunctions,toachieveliftpump,aircompressorinventilatorroomfrequencyconversionandpowerfrequencycontrol,intelligentcontrolthedosingpumpandreturnsludgepump.Intheprocessofautomaticcontrol,ismainlytocollectDOMeterTesterturnedbacktotheswitchsignal,liquidlevelinstrumentvariablebacktotheswitchsignal,switchsignalofthePHtester,foraircompressor,liftpump,dosingpump(NaOH)automaticcontrol.Intheoperationofaircompressor,bythePLCtimecontrolprogramtoswitchaircompressortime.Topicdesignpowerdistributionsystem,PLCcontrolcircuit,PLCprogram,andcarriedouttheprocesssimulation,bythesimulationtoachievetheexpectedcontrolrequirements.PLCimprovesthereliabilityofautomaticcontrol,notonlyreducesthelaborintensityofworkers,andimprovethepharmaceuticalwastewatertreatmentefficiency,realizedsewagefactoryproductionmanagement.Notonlymakethepharmaceuticalcompany'ssewageisdischarged,andapartofthesewagecanberecycled..Keywords:Wastewatertreatment;automaticcontrol;PLCcontrol目录I目录第1章绪论.................................................................................................................................11.1制药污水处理的必要性....................................................................................................11.2制药污水治理的现状........................................................................................................11.3本课题的研究背景及意义................................................................................................11.4课题设计的方案及技术路线............................................................................................3第2章硬件选择及控制电路图设计.........................................................................................62.1污水管线控制工艺流程图................................................................................................62.2污泥管线控制工艺流程图................................................................................................72.3药剂管线控制工艺流程图................................................................................................82.4硬件选择............................................................................................................................82.4.1PLC的选择.................................................................................................................82.4.2扩展模块的选择.......................................................................................................102.4.3中间继电器的选择...................................................................................................112.4.4变频器的选择...........................................................................................................122.4.5电动机的选择...........................................................................................................132.4.6电机保护器的选用.................................................................................................132.5控制电路的设计..............................................................................................................152.5.1故障切换电路的设计...............................................................................................152.5.2配电系统设计...........................................................................................................17第3章PLC控制电路程序........................................................................................................193.1PLC编程流程图的设计...................................................................................................193.1.1总体流程设计...........................................................................................................193.1.2污水提升泵的PLC编程流程图..........................................................................193.1.3接触氧化池系统工作流程图...................................................................................21目录II3.1.4污泥回流系统流程图...............................................................................................223.2PLC继电器端子接线及端子功能...................................................................................233.3PLC控制程序...................................................................................................................26第4章结论...............................................................................................................................37致谢................................................................................................................错误!未定义书签。参考文献.....................................................................................................................................39第1章绪论1第1章绪论1.1制药污水处理的必要性近几年随着工业的飞速发展，各种