污水处理厂自动控制系统的设计摘要：随着社会进步,经济稳步发展,生活水平不断提高,环境问题已经成为了一个严重的问题，其中污水处理的问题已经迫在眉睫，急需要去解决。然而大部分污水处理厂的控制通常是传统的仪表控制,主要是人工控制,很少一部分是半自动、半手动控制方法，数据也不能及时的得到并处理。这样使得大部分污水处理厂的运行成本高,经济收益比较低,而且控制系统落后等一系列问题。因此，实现污水处理厂的自动控制系统已经成为污水处理厂安全、稳定、长周期和优化运行的重要保证，而研究污水处理过程自动控制系统的功能、架构与实施方法具有重要的实用意义。本文运用PLC控制技术就污水处理厂从污水进入到净化完成的工艺流程及自动控制系统进行了设计。关键字：污水处理；自动控制系统；PLC；设计；DesignofautomaticcontrolsystemforsewagetreatmentplantAbstract:Withthesocialprogress,thesteadydevelopmentoftheeconomy,thecontinuousimprovementoflivingstandards,environmentalproblemshavebecomeaseriousproblem,inwhichtheproblemofsewagetreatmentisimminent,urgentneedtosolve.However,mostofthesewagetreatmentplantcontrolisusuallythetraditionalinstrumentcontrol,mainlymanualcontrol,asmallpartofthesemi-automatic,semi-manualcontrolmethod,thedatacannotbetimelyandprocessed.Thismakesmostofthesewagetreatmentplantoperatingcostsarehigh,theeconomicbenefitsarerelativelylow,andthecontrolsystembehindaseriesofproblems.Therefore,therealizationoftheautomaticcontrolsystemofthesewagetreatmentplanthasbecomeanimportantguaranteeforthesafety,stability,longcycleandoptimizationofthesewagetreatmentplant.Thefunction,structureandimplementationoftheautomaticcontrolsystemofsewagetreatmentprocesshaveimportantpracticalsignificance.Inthispaper,theuseofPLCcontroltechnologyonthesewagetreatmentplantfromthesewageintothepurificationprocessandthecompletionoftheautomaticcontrolsystemwasdesigned.Keywords:Sewagetreatment;Automaticcontrolsystem;PLC;design；目录1绪论...................................................................................................................................................11.1引言................................................................................................................................................11.2目的和意义..................................................................................................................................11.3国内外的研究现状......................................................................................................................12污水处理工艺流程......................................................................................................................12.1污水的处理....................................................................................................................................12.2污泥的处理....................................................................................................................................32.3出水的消毒....................................................................................................................................42.4污水厂设计标准与工艺流程....................................................................................................43污水厂自控系统的硬件设计.................................................................................................73.1系统结构............................................................................................................................
