文档介绍：摘要
随着国家对环境保护的日益重视,有效地控制二氧化硫的污染已成为国家规划的一部分。本文在众多烟气脱硫方法中,选择了常用的湿式石灰石烟气脱硫技术,并对烟气脱硫系统的结构组成和原理进行介绍。根据湿式石灰石烟气脱硫工艺及方案,文中给出以参与采集数据与过程控制的可编程控制器(PLC)为现场控制级,通过以太网技术搭建集散式控制系统,并以MCGS组态软件实时监控系统的设计方案。其中,针对湿式石灰石-石膏烟气脱硫过程具有的大惯性、时滞,非线性等特点,利用PLC的PID算法实现烟气脱硫中的吸收塔ph控制与流量控制。MCGS作为上位机软件提供友好的用户界面,实现了运行参数流程与列表数据显示。
关键词:集散控制系统可编程控制器组态软件 PID控制
ABSTRACT
Since the authority gradually emphasized much on the environmental protection, the control of the SO2 emission had been further rigidified as a part of the state agenda. [12] A wet flue gas desulfurization process which shares the widespread popularity, is presented among flue gas desulfurization technologies, and the structure, and principium of flue gas desulfurization system is also introduced. Base on limestone/gypsum wet flue gas desulfurization process character and feature, an implementation that PLC (Programmable Logic Controller) and are constructed in DCS (Distributed Control System) architecture while configuration software MCGS is observing the system, is designed. For the limestone/gypsum wet flue gas desulfurization process with large inertia, delay, non-linear, PLC as the field layer is, acquire the data and control the operation via PID (Proportional Integral Differential)Algorithm that will achieve the function of ph control and flow control in the process. As is the PC configuration software, MCGS proves to be friendly to operator, controlling system operation and displaying process parameters.
Key words: Distributed Control System Programmable Logic Controller Configuration software PID controller
目录
摘要 Ⅰ
ABSTRACT Ⅱ
1绪论 1
1
1
2
2
2系统分析 3
3
3
5
6
6
可编程序逻辑控制器(PLC)介绍 8
集散控制系统(DCS)简述 9
本设计主要任务 10
3系统控制设计 11
控制原理 11
控制原理概述 11
控制原理的分析与选择 11
4系统硬件设计 14
集散系统设计 14
系统功能总设计 14
集散控制系统构成 14
PLC设备的选型 15
PLC机的选择 15
PLC机的设置 15
ph变送器、流量变送