基于PLC的污水处理监控系统 毕业论文.pdf

基于 PLC 的污水处理监控系统 摘要 我国多数污水处理控制系统自动化水平不高、安全性低、管理不当，效率普遍低于世 界标准。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只要问题。 中国污水处理自控系统相对落后，污水处理成本居高不下，污水厂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，减少运行费用，具有重要意 义。本文介绍了工厂污水处理的基本工艺和流程，并通过研究设计一套基于 PLC 控制的污 水处理系统。文章首先介绍了基于 PLC 污水处理控制系统的工艺及相关流程，控制系统硬 件结构及设计、工作原理以及设计 PLC 控制系统的基本原则和步骤，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器控制和自动控制路线 ，主要包 括设备的起停、状态信号、故障信号和信号采集等，最后按照工艺要求设计 PLC 控制系统， 其 中包括 PLC 的选型、系统资源配置以及按照污水处理工艺编制 PLC 程序 。 关键词：污水处理；PLC Sewage treatment monitoring system based on PLC Abstract Our country majority of wastewater treatment control system automation horizontal anti higher -low stability, manage not appropriate, the efficient is more widespreadly low than a world standard. The Pu gas process control in the wastewater treatment system, data telecommunication and supervision are the key problems that needs settle urgently. Chinese wastewater treatment from control system contra to fall behind, the wastewater treatment cost is high, the fluid matter instability of sewage of handling of sewage plant emissions super, so how create useful from control system, excellent effect for turning run-time, decrease running expense, have important meaning. This text introduced that basic craft and flow process of works wastewater treatment, and design a wastewater treatment system that control according to PLC though a search. The article introduced according to the craft and related flow process of PLC wastewater treatment control system first, control system hardware structure and design, operate priniple and design PLC control system. Keyword:Wastewater treatment; PLC 目录 第1 章 绪论 ·····················································1 1.1 选题的目的和意义 1 ················································