1、 1 基于基于 PLCPLC 的污水处理控制系统的污水处理控制系统 班 级 ：自动化 专 业 ：电气自动化 所 在 系：电气工程系 指导老师： 完成时间 2012 年 1月 1 日至 2013 年月 21 日 2 摘摘 要要 近年来,污水处理厂已成为各个城市最重要的基础设施之一。尤其 是中小城市,新建或扩建污水处理厂已成为当地政府改善人民生活水平 的头等大事。随着自动化技术、计算机技术的不断发展、完善,污水处 理厂的自动化水平也相应提高。 而 PLC 控制器以其技术成熟、 通用性好、 可靠性高、安装灵活、扩展方便、性能价格比高等一系列优点，在工业 控制中得到了越来越广泛的应用。本文主要介绍了污
2、水处理厂自动控制系 统的组成、功能及如何利用 PLC 实现自动控制,并介绍了在系统实施中遇到的若 干问题及其解决措施。在污水处理中采用 PLC 控制系统改造后，提高了自 动控制的可靠性,不仅减轻了工人的劳动强度,而且提高了污水处理厂 的运行效率和运行效益,实现了污水厂生产管理的科学性。 关键词关键词：PLC,污水处理，工艺流程 3 Design based on the PLC industrial sewage processing system Abstract In recent years, sewage treatment plant has already become one o
3、f the most important infrastructures in every city, and especially in small and medium-sized ones, to build and expand such plants has been on the local governments top agenda to improve peoples life. With the development and improvement of automation technique and computer technology, automation le
4、vel of sewage treatment plants has also made a corresponding leap. While PLC has series of merits such as: mature technique, fine universal property, high reliability, flexible to install, convenient to expand, excellent cost performance, etc, which have enabled it gain a more and more widespread ap
5、plication in industrial control. This paper will mainly introduce the composition and function of the automatic control system in sewage treatment plants and several problems that may occur in the practical use of the system and the possible solutions to them. Since the transformation by employing P
6、LC control system in sewage treatment, the reliability of automatic control has been advanced, which has not only reduced workers work intensity, but also improved the operational efficiency of the sewage treatment plants, thus has made the scientific administration of manufacturing in sewage treatment plants possible. Key words: PLC, Sewage treatment,craftwork flow 4 目目 录录 1 绪 论. 5 1.1 工业污水处理的发展趋势 6 1.2 课题的背景 6 1.3 研究目的和意义 7 1.4 课题主要设计的内容 7 2 工业污水处理控制系统总体介绍 8 2.1 工业污水处理
