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Research on Distributed Contorl System of Circulating Fludized Bed Boiler

Author: LiuGang
Tutor: HuSheJiao
School: Hefei University of Technology
Course: Signal and Information Processing
Keywords: Circulating fluidized bed boiler Distributed Control System Drum Level
CLC: TP273~.5
Type: Master's thesis
Year: 2009
Downloads: 248
Quote: 1
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Abstract


The distributed control system (Distributed Contorl System, DCS) With computer technology, the cathode ray tube display technology and network communication technology and developed a new type of computer control systems . It successfully to the automatic control of the production process with the automation of information management together , and have been widely used in many areas of industrial control . The circulating fluidized bed is clean and efficient coal-fired device developed in 1970s , is an efficient , low-pollution , fuel adaptability , good load regulation performance , has become one of the leading equipment for industrial boilers . The circulating fluidized bed boiler main the analogue instrument to control analog gauges own limitations , the circulating fluidized bed control system is difficult to achieve precise automation control , and operating parameters can not be stored . In this paper, the U.S. Honeywell the HC900 control systems birch Giti Tire Co. , Ltd. 75 t / h circulating fluidized bed were distributed control system design and implementation . This paper first introduces the development status of the distributed control system , the basic structure and principles, combined with the technological characteristics of the circulating fluidized bed boiler and combustion principle focuses on the application of distributed control systems in the circulating fluidized bed boiler control . For the amount of core control - control of circulating fluidized bed boiler drum water level height , height typical drum level control algorithm analysis and comparison of the three impulse control algorithm to stabilize boiler drum level . Steam flow , pressure and water into the boiler drum level multi-coupled relationship , the different effects of the three parameters boiler drum level , designed to meet the control requirements of the algorithm . The system has been put into practical operation , the results show that the DCS control system has a block of response speed , high control accuracy , control the quality good , to achieve the design requirements . Complete distributed control system of circulating fluidized bed boiler data communication , user interface design , and data storage requirements . The distributed control system designed to solve the shortcomings of previous data can not be stored , run reports rely on hand-written , and greatly improve the operating efficiency of the operating personnel , to improve the stability and reliability of the boiler operation .

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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