文档介绍：135MW循环流化床(CFB)锅炉机组DCS的应用
摘要
循环流化床锅炉以其低污染、高效、适应煤质广、负荷调节范围大等优点
为众多电厂所采用,但由于循环流化床锅炉的控制参数多,燃烧控制原理复杂,
用常规的仪器仪表控制,已不能满足循环流化床锅炉发展的需要,需要配备性
能优良的控制系统,目前大型的循环流化床锅炉发电机组都已采用分散控制系
统(DCS)进行控制。近年来,为了适应循环流化床锅炉机组控制系统的需要,
DCS 设计、生产制造和使用单位通过不断的总结经验、改进设计,有效地提升
了循环流化床锅炉发电机组 DCS 的可靠性、实时性和精确性。
本文介绍了循环流化床锅炉的发展和主要特点,提出了循环流化床锅炉与
煤粉炉在控制方式上的异同点;对炉膛安全监控系统(FSSS)、调节控制系统、
燃烧控制系统、点火启动控制系统、汽水调节系统的原理和功能进行分析和说
明,并根据循环流化床锅炉的特性提出了相应的控制方案。
本文结合新庄孜电厂技改工程 2×135MW 循环流化床锅炉机组 DCS 的设
计配置情况,work-6000+分散控制系统各部件特点及其主要的功能;
论文根据 DCS 在工程设计、安装和试运行中遇到的重点问题作为研究背景,分
别对 DAS、MCS、SCS、ECS 在工程中的应用方案做了详细说明,通过电厂实
际运行结果表明,应用效果良好,不仅减轻了运行人员的劳动强度,更重要的
是确保了机组安全、经济、高效的运行。
关键词:循环流化床, 发电机组,分散控制系统, 调节控制
Application of DCS on 135MW CFB
Cogeneration Unit
ABSTRACT
Circulating fluidized bed (CBF)boiler is widely employed by many large power plants with
the advantages of low pollution,high efficiency, fuel flexibility and convenient load
regulating capability. However,because of plex control parameters plicated
combustion control process, conventional instrumentations can not meet the demand of
CFB boiler controlling, it is necessary to introduce new control system with excellent
performance, distributed control system (DCS) have been widely adopted by lots of
large-scale CFB boiler units. In recent years, in order to meet theneeds of control unit of
CBF boiler, through continuous learning from experience, design improving, designers,
manufacturers and users of DCS have effectively improve the performance of reliability,
real-time and accuracy of . DCS control system.
In this dissertation, the developing process and the main features of CFB boiler are
introduced firstly, then the similarities and differences between CFB boiler and pulverized
coal furnace pared on the aspects of controlling method; many principles and
functions have been analyzed and explained,such as furnace safety supervisory system
(FSSS), regulation and control systems, combustion control syste