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循环流化床锅炉培训模拟操作仿真研究
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摘要
目前国内能源生产以煤为主,其中劣质煤、高硫煤及油页岩储量大,循环流化床锅炉为这类能源的利用提供了良好途径,被广泛应用到电力、供热等企业,即缓解我国动力煤紧张的局面,又克服燃煤带来的环境污染问题,实现了能源生产可持续发展。
     本文以130t/h循环流化床锅炉机组仿真模拟为例,借助计算机仿真技术,采用组态方法模拟锅炉运行工况培训循环流化床锅炉操作人员,进而避免和减少了运行人员发生误操作事故,增强运行人员在解决事故过程中遇到突发事件的处理能力。首先,依据循环流化床锅炉建模时风量、燃料量、炉膛负压和汽水系统特性,建立了PID回路调节燃烧系统及汽水系统控制,并设计了锅炉汽水系统、炉膛系统、风烟系统和母管制锅炉蒸汽负荷控制四个子系统,分析了机组负荷自动控制特点及设计规范。其次,在组态环境AdvanTrol-Pro下应用DCS系统设计循环流化床锅炉监控操作、过程判断、工况分析、日志管理以及事故处理等程序。并与运行组态程序交换信息,提供比较、查询、显示和打印等功能。最后,介绍了嵌入Visual C++语言编写优化监控模块,定义List类作为构造函数的公有继承使得程序变量高度规范、统一、模块调用简化,提高了程序可读性。综合设计后阐述了锅炉水位低报警,低限引起的紧急停炉事故处理仿真模型。充分运用了组态操作界面对CFBB系统工况全变量数字模拟,为培训人员提供了真实的模拟环境,本文研究方法及结论为推进了锅炉培训智能化进程及完善计算机辅助锅炉自动控制系统设计技术领域的建设提供理论指导。
These days domestic energy production priorits to coal, therein low-quality coal,high-sulfur coal and oil shale reserves are larger, circulating fluidized bed boiler(CFBB) provides a good use of channels for this type of energy development.Widely applied to electric power,providing heat and other enterprises,not only to ease the tense situation of steam coal, but also to overcome the problem of environmental pollution caused by coal-fired ,and to achieve the continuable development of energy production.
     In this paper, for example the 130t/h CFBB unit simulation,using computer simulation techniques to simulate the configuration of the boiler operating conditions in CFBB operator training, and thus avoid or reduce the operator mistake incidents, to enhance operators’ability about processing the settlement of the unexpected and accident events.
     First, based on CFBB’s modeling makes the characteristics of air-flow, fuel quantity, the furnace vacuum and water systems. Setting up PID regulator control of combustion and water systems, and designing boiler water system, furnace system, wind-smoke system, and mother-duct of boiler steam load control ect four sub-systems design. Analysing of the CFBB’s load characteristics and design specifications about automatic control system.
     Secondly, around the configuration of the AdvanTrol-Pro software environment applicated DCS system design in monitoring program under the CFBB operation, the estimate of process, condition analysis, log management and incident handling program. And exchanging information with runned the configuration program, providing comparison, query, display and print functions.
     Finally, the introduction about the embedded Visual C + + language optimization monitoring, the definition of List class as a constructed function, the public inheritance makes the process highly regulated, unity, the module called simply, improved the program readability. After the comprehensive analysis expounds that the established water level simulation model caused by an emergency shutdown boiler in Low limit alarm. Full use of the configuration interface of the CFBB system-wide variable digital simulation conditions, providing a real simulation environmen for the training. The research method and conclusions mentioned above will provide theoretical guidance to promoting the training of boiler intelligent process, and improving the field of automatic control computer-assisted boiler system design.
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