1、 题题 目目: : 基于基于 s7s7- -300PLC300PLC 污水处理系统中的应用污水处理系统中的应用 摘 要 随着经济建设的快速发展与人口的急剧增长, 我国对环境问题也是越来越重 视,污染控制指标日益严格。其中污水处理厂的规模也是相对的变大了许多,污 水处理厂的管理和设备的控制面临着严峻的考验。 集散控制系统运用污水处理中 可以大大的提高污水处理的可靠性,以及出水的水质,降低能耗和工人的劳动强 度,达到提高经济效益的目的。 根据 SBR 污水处理工艺要求, 本文讲了如何实现集散控制系统对污水处理系 统各环节的自动控制,其中主要讲了预处理区、粗细格栅、提升泵、沉淀池这几 部分的自动控制
2、。该系统选用 S7-300PLC 作为控制设备,把 DCS 系统用于 SBR 工艺。 通过系统软件硬件的设计与调试, 进一步实现了用西门子 PLC 对现场设备的 自动控制和数据采集功能,能达到设计要求。 关键词关键词:DCS 系统,SBR 工艺,S7-300PLC ABSTRACTABSTRACT With the rapid growth of the rapid development and population of economic construction, our country pay more and more attention to environmental probl
3、ems, pollution control index of increasingly stringent. The size of the sewage treatment plant is relative larger number, control management and equipment of the sewage treatment plant is facing a severe test. Distributed control system applied in sewage treatment can greatly improve the reliability
4、 of sewage treatment, and the effluent quality, reduce the energy consumption and labor intensity of workers, improve the economic benefit. According to the SBR sewage treatment process requirements, this paper explained how toealize the automatic control system of the sewage treatment system, which is mainly about the pre-processing area, thickness grille, lifting pump, automatic control of sedimentation tank of these parts. The system adopted S7-300PLC as the control device, the SBR techno