摘要:循环流化床锅炉不仅能够低温燃烧各种劣质燃料,而且排放烟气中硫及氮氧化物少,具有较高的经济效益和环保效益,近年来,在电力、化工生产等行业中得到越来越广泛的应用。但循环流化床锅炉燃烧过程很复杂,且是一个多变量耦合的系统,难以建立精确的数学模型。本文设计了基于模糊控制的流化床床温控制系统,并进行了仿真试验。对循环流化床锅炉结构、工作过程及燃烧过程进行了分析,介绍了其燃烧过程的控制策略,特别分析了影响床温的主要因素,设计了床层温度控制器,给出了在该控制器下实际动态品质及参数优化结果,证明该控制器在现场的可行性。力控软件是完成数据采集与过程控制的专用软件,它以计算机为基本工具,为实施数据采集、过程监控、生产控制提供了基础平台和开发环境。9459
关键词:循环流化床锅炉;床温;控制;调节
The design of circulating fluidized bed boiler temperature control system
Abstract:Circulating fluidized bed boiler can not only low temperature combustion of low-grade fuel, and emissions of sulfur and nitrogen oxides in flue gas, has high economic benefit and environmental protection benefit, in recent years, has been widely used in electric power, chemical industry and other industries. But the circulating fluidized bed boiler combustion process is very complex, and the system is a multivariable coupling, it is difficult to establish accurate mathematical model. This paper designs the fluidized bed temperature control system based on fuzzy control, and simulation experiment. The circulating fluidized bed boiler structure, working process and combustion process was analyzed, the control strategy of its combustion process, especially analyzed the main factors which affect the bed temperature, bed temperature controller design, the actual controller under dynamic quality and optimization results are presented, proving the feasibility of the controller in the field. Configuration monitoring software is completed special software for data acquisition and process control, it takes the computer as the basic tool, for the implementation of data acquisition, process control, production control provides a basic platform and development environment.
KeyWords:Circulating fluidized bed boiler; bed temperature; control; regulation
目 录
1绪论1
1.1 床温控制的影响 1
1.2 循环流化床锅炉床温串级控制系统2
1.3 循环流化床锅炉床温遗传算法控制系统2
1.4 循环流化床锅炉床温模糊自整定PID控制系统2
1.5 可编程逻辑器的相关资料2
2 循环流化床锅炉床温的控制6
2.1 床温控制的发展 6
2.2 床温控制的意义 6
2.3 床温控制的方式9
2.3.1 蒸汽减温系统9
2.3.2 冷渣减温系统9
2.3.3 冷灰减温系统10
2.4 超温控制的比较10
2.5 床温控制点的选择11
3 方案论证13
3.1 给煤量控制13
3.2 风量控制13
3.3 灰量控制14
4设计过程15
4.1 画面创建15
4.2 动画连接17
4.3 I/O设备设置及PLC连接18
4.4 创建实时数据库20
4.5 系统功能实现的脚本程序21
4.6 实际温控曲线与历史报表23
5 结论25
致谢26
参考文献27