中文摘要目前许多缺水城市和地区无新的水源可开发利用，污水的回收和再用已成为解决水资源短缺的有效措施之一。而PLC控制器以其技术成熟、通用性好、可靠性高、扩展方便等一系列优点，在工业控制中得到广泛应用。由此，做一个基于PLC的污水处理系统的设计，具有很深的现实意义。基于PLC的污水处理厂行车、提升泵系统，主要目的是实现污水处理厂的提升泵房提升泵的手动和自动控制，瀑气池回流泵的行车控制。本系统设计了四台水泵，三台工作，一台备用，可以实现远程手动、远程液位启停和控制。潜污泵可按照集水井内液位高度进行启停，液位高度由液位传感器检测，进而控制水泵电机的启停。同时也通过PH计对污水PH值的检测来控制PH过低或者过高时的提升泵的停止，实现自动过程中与PH值的联动。关键词污水处理提升泵PLC毕业设计外文摘要TitleDesignofdrivingandliftingpumpsysteminsewagetreatmentplantAbstractAtpresent,manywater-scarcecitiesandregionshavenonewsourcesofwateravailableforexploitation.Therecoveryandreuseofsewagehasbecomeoneoftheeffectivemeasurestosolvewatershortages.ThePLCcontrolleriswidelyusedinindustrialcontrolduetoitsmaturetechnology,goodversatility,highreliability,andconvenientexpansion.Therefore,thedesignofaPLC-basedsewagetreatmentsystemhasaprofoundpracticalsignificance.ThemainpurposeofthePLC-basedsewagetreatmentplantdrivingandliftingpumpsystemistorealizethemanualandautomaticcontroloftheliftingpumpofthepumpingstationinthesewagetreatmentplant,andthedrivingcontrolofthebackflowpumpofthewaterfallpool.Thesystemhasdesignedfourpumps,threework,andonestandby,whichcanrealizeremotemanual,remoteliquidlevelstartandstopandcontrol.Thesubmersiblesewagepumpcanstartandstopaccordingtotheheightoftheliquidlevelinthewatercollectionwell.Theheightoftheliquidlevelisdetectedbytheliquidlevelsensortocontrolthestartandstopofthepumpmotor.Atthesametime,thePHmeterofthesewageismeasuredbythePHmetertocontrolthestoppageoftheliftpumpwhenthePHistoolowortoohigh,andthelinkagewiththePHvalueintheautomaticprocessisrealized.KeywordssewagetreatmentLiftingpumpPLC目录1绪论.................................................................11.1课题的背景及意义...................................................11.2国内外污水处理发展现状.............................................12污水处理厂行车、提升泵系统设计总体方案...............................32.1课题主要实现的功能.................................................32.2系统工作流程.......................................................32.3系统框图...........................................................33污水处理厂行车、提升泵系统设计硬件设计及选型.........................53.1主电路的设计.......................................................53.2潜污泵选型.........................................................63.3低压断路器选型.....................................................73.4熔断器选型.........................................................83.5热继电器选型......................................................103.6接触器选型........................................................103.7液位开关选型......................................................123.8限位开关选型......................................................133.9触摸屏选型........................................................143.10报警指示灯选型...................................................153.11控制电路的设计...................................................153.12PLC及其扩展模块的选型............................................164系统软...
