下载后可任意编辑摘 要本论文主要讨论污水处理系统的 PLC 控制系统，随着城市的快速进展，环境问题显得日益重要。污水是破坏环境的一个重要因素，目前中国污水处理自控系统相对落后，污水处理成本居高不下，污水站排放的处理过的污水的水质不稳定，所以如何建立有效的自控系统，优化运行效果，具有重要的意义。文章首先介绍了 PLC 控制系统的硬件结构、工作原理以及设计 PLC 控制系统的基本原则和步骤。然后以 SBR 污水处理工艺为例，来说明 PLC 在污水处理过程中的应用。先根据污水处理要求设计了设备的电气控制与自动控制线路，主要包括设备的启停、状态信号等。最后根据工艺要求设计PLC 控制系统，包括 PLC 的选型、系统资源配置以及根据污水处工艺编制PLC 程序等。 建立高度自动化污水处理站，不仅可以加强整个系统的可靠性、准确性，还可以减少劳动强度，降低处理成本和节约能源。污水处理站自动控制系统的建设将降低生产和维护成本，减轻生产及维护工人的劳动强度，并为生产工艺进一步改进提供方便，具有很好的经济效益和社会效益。关键词：污水处理； PLC；硬件配置；软件设计- I -下载后可任意编辑AbstractMy main research is the PLC control system of sewage treatment. With the rapid development of cities, the environment becomes more and more important. Wastewater is one of the major factor of pollute the environment. The automatic controlling system of wastewater treatment is not very advanced in China. The water qualities of the treated wastewater are unstable. So how to solve the problems is very meaningful to our country.This paper introduced the hardware structure, work principle of PLC control the system and design PLC control system’s basic principle and step, then with the SBR wastewater treatment craft for example to illustrate the PLC in the application in the wastewater treatment process. Designed the electricity control of equipments and automatically control circuit according to the sewage treatment requirements, mainly include the start and stop of equipments, the state o...
