文档介绍：摘要
、保证充足供水,,,如果仍然沿用人工方式,劳动强度大,工作效率低,安全性难以保障,为此必须进行滤池自动化系统地改造.
本文从水厂滤池自动控制系统地控制要求和工艺特点出发,,为实现恒水位过滤,,本系统在设计上就主控PLC如何更好地与现场PLC协调控制滤池地反冲洗方案进行了对比并且做了优化,增强了控制思路地清晰性,达到了预期地控制效果.
根据系统地控制要求,进行了硬件设备地选型,设计了控制系统硬件配置图、I/O模块接线图,并编写了实现控制算法地程序.
关键词:水厂滤池,恒水位PID控制,自动反冲洗,协调控制
ABSTRACT
Water supply is an important industry for the people's livelihood. Not only to meet the needs of the work pressure and to ensure adequate water supply, but also called for the improvement of water quality. As to conventional water treatment plant, filter is the last structures of water purification processes, filter run a direct impact on water quality. The process of filter backwash plexity, if still used in manually, labor-intensive, low productivity, so it is difficult to ensure the safety of this system and it must be transformed to automatic systems.
In this paper, as a view of the automatic control system for the water plant filter requirements and process characteristics, the automatic control system for the water plant design of a set of hardware and software based on the ControlLogix system has been plished. When in the normal filtrate period,
in order to keep the constant level, designed the PID filter level control system which is based on the water flow parameters. When receives backwashing signals, the control system on how to enhance coordination between master PLC
and on-site PLC, has pared and optimized.
According to requirements of the designed control system, the selection of hardware devices, hardware configuration, I/O module wiring diagram, procedures for the realization of control algorithm have been plished.
Keywords: water plant filter, constant water level on PID control, automatic backwashing, coordinated control
目录
1绪论 1
1
课题研究内容 2
研究地目地和意义 5
2 控制系统总体方案地设计 7
系