2023年基于欧姆龙PLC的污水处理系统设计

第基于欧姆龙PLC的污水处理系统设计

摘要

目前，我国大多数污水处理控制系统自动化水平不高、安全性低，效率普遍低于世界标准，而且污水处理成本居高不下，污水厂排放的处理过的污水的水质不稳定。污水处理系统中的曝气过程控制、数据通讯和监控管理是急需解决的主要问题。所以如何建立有效的自控系统，优化运行效果，减少运行费用，具有重要意义。

本系统设计的污水处理采用A2/O处理工艺，整个监控系统分为三部分:现场数据采集部分，完成数据采集功能；现场控制单元，分现场控制柜和PLC站，现场控制柜主要完成手动控制，PLC站主要完成数据处理、自动控制及通讯功能；上位监控部分，主要监视现场各工艺流程运行状况并实施远程控制功能。

本系统以OMRON公司的PLC作为数据采集及控制单元，配合各种检测仪表和控制设备对污水的液位、流量、pH值、温度及溶解氧浓度等控制量进行数据采集。同时，按照控制要求对各个现场设备如粗细格栅、提升泵、鼓风机等进行相应控制。根据工艺流程和控制要求设立了3个分布站，各站通过以太网与上位机相连。上位机通过组态王和各站进行数据交换，从而实现集中控制。

关键词：污水处理，PLC，工艺流程

Abstract

Atpresent,themajorityofoursewagetreatmentcontrolsystemautomationlevelisnothigh,lowsecurity,efficiencyisgenerallylowerthantheworldstandard.Andhighcost,thequalityofsewagetreatmentisunstable.Inthesewagetreatmentsystem,theaerationprocesscontrol,datacommunicationsandmonitoringandmanagementarethemainissuesthatneedtoberesolved.Sohowtoestablisheffectiveautomaticcontrolsystemtooptimizetheoperatingresults,andreducesoperatingcostsisofgreatsignificance.ThesystemofsewagetreatmentplantusingtheA2/Oprocessingtechnology,thewholemonitoringsystemispidedintothreeparts:thefielddataacquisition,tocompletethedataacquisitionfunction;fieldcontrolunit,pidedintothecontrolcabinetandPLCstation,thecontrolcabinetismainlytocompletethemanualcontrol,PLCstationmainlycompletesthedataprocessing,automaticcontrolandcommunication;PCmonitoringsection,themainsurveillancesitetheprocessoperatingconditionsandtheimplementationofremotecontrolfunction.

ThissystemusingOMRONPLCasthedatacollectionandcontrolunit,withavarietyofinstrumentationandcontrolequipmentforsewageliquidlevel,flowrate,pHvalue,temperatureanddissolvedoxygenconcentrationcontroldatacollection,atthesametime,inaccordancewiththerequirementsofthecontrolthefieldequipmentsuchasthicknessgrille,liftingpump,blowerandthecorrespondingcontrol.Thesystemaccordingtothetechnicalprocessandcontrolrequirementsfortheestablishmentof3distributionstations,eachstationthroughtheEthernetandthePCconnected.PCisusingKingviewtoexchangedatawitheachstation,thusrealizingthecentralizedcontrol.

Keywords：Sewagetreatment,PLC,process

目录

摘要....................................................................IABSTRACT................................................................II目录..................................................................III前言...................................................................VI第一章绪论.............................................................1.4

城市污水处理国内外发展现状......................................................................................1课题研究的目的和意义................................................................................................2本论文的主要工作......................................................................................................2本章小结....................................................................................................................3

第二章城市污水处理的工艺流程..............................................32.1污水处理指标.................................................................................................................32.2污水处理的基本工艺方法.................................................................................................52.3本系统采用的工艺介绍....................................................................................................62.4本章小结........................................................................................................................7第三章城市污水处理控制系统方案设计.........................................83.1设计原则........................................................................................................................83.2设计思想........................................................................................................................83.3系统构成........................................................................................................................83.3.1系统结构图..............................................................................................................83.3.2各单元功能描述.......................................................................................................93.4本章小结......................................................................................................................10第四章控制系统硬件设计..................................................114.1仪表系统......................................................................................................................114.1.1仪表选型原则........................................................................................................114.1.2本系统主要仪表......................................................................................................114.2PLC1站设计..................................................................................................................124.2.1粗格栅...................................................................................................................124.2.2提升泵房...............................................................................................................124.2.3细格栅..................................................................................................................134.2.4曝气沉砂池...........................................................................................................134.2.5控制柜设计...........................................................................................................OMRONCJ1M介绍.............................................................................................PLC1站设计....................................................................................................PLC1站选型....................................................................................................154.3PLC2站设计..................................................................................................................164.3.1鼓风机电器控制原理..............................................................................................164.3.2控制柜设计...........................................................................................................18

PLC2站设计....................................................................................................PLC2站选型....................................................................................................184.4PLC3站设计..................................................................................................................184.4.1生化反应池...........................................................................................................194.4.2二沉池..................................................................................................................194.4.3污泥回流泵房........................................................................................................194.4.4污泥贮池...............................................................................................................194.4.5控制柜设计...........................................................................................................PLC3站设计....................................................................................................PLC3站选型....................................................................................................204.5本章小结......................................................................................................................21第五章控制系统软件设计..................................................235.1PLC编程.......................................................................................................................235.1.1编程软件...............................................................................................................235.1.2PLC编程................................................................................................................硬件组态........................................................................................................程序设计........................................................................................................245.2上位监控画面设计.........................................................................................................285.2.1图形界面设计...........................................................................