污水厂粗格栅自动控制系统设计及应用毕业设计（已处理）.doc

污水厂粗格栅自动控制系统设计及应用毕业设计 吉林化工学院毕业设计说明书 污水厂粗格栅自动控制系统设计及应用 Wastewater Treatment Plant Coarse Grid Design and Application of Automatic Control Systems 摘 要 为了解决粗格栅污水处理生产效率低、需要大量的人工操作和维护复杂等问题,本设计提出了应用可编程控制器实现无人监守、自动控制的系统方案。 本文介绍了粗格栅污水处理工艺原理和控制要求,采用简易的逻辑控制、硬件和软件互锁的方法实现自控要求。阐述了粗格栅系统的电气控制系统设计和自控系统设计。电气控制系统设计根据污水处理厂承担的负荷和尖峰电流选择低压开关、断路器和熔断器等设备型号。自动控制系统部分包含下位机项目的创建、编写和仿真调试,绘制控制系统流程图和二次回路接线图;上位机部分有现场监控画面、历史趋势曲线画面、报警画面和PID变频控制画面。本系统可实现自动、手动、远程控制,改善污水处理系统操作环境。最后对系统的调试与运行结果分析得知,粗格栅系统设计基本达到预期的要求。 关键词:污水处理;粗格栅;电气控制;可编程控制器 Abstract In order to solve the coarse grid of sewage treatment and low production efficiency, requires a lot of manual operation and maintenance of complex issues such as the present design of the application of programmable controllers nobody probation program of automatic control systems. This article describes the coarse grid sewage treatment process principle and control requirements, the use of simple logic control, hardware and software interlock to achieve self-control requirements. The coarse grid system electrical control system design and automatic control system design. Electrical control system design based on bear the load and the peak current of the sewage treatment plant to select the device model of the low-voltage switchgear, circuit breakers and fuses. Part of the automatic control system includes the creation of the next bit machine, the preparation and simulation debugging, draw control system flow chart and the secondary circuit wiring diagram; live monitor screen of the host computer part of the historical trend curve screen, alarm screens and PID frequency conversion control screen. This system can achieve automatic, manual, remote control, to improve the sewage treatment system operating environment. Finally, system commissioning and operation results of the analysis of the coarse grid system, the basic design to meet expectations. Key Words:Sewage treatment;Coarse grid;The power electricity system design; PL