Design And Application Of FGD Control System In Power Plant

At present, the Distribution control system has thoroughly arrived at all the various trades and occupations, widely applied to electric power, petroleum, chemical industry, metallurgy, drugs manufacture, environmental protection domain and so on, and has obtained remarkable economic efficiency and social efficiency. Along with computer technology and network technology's rapid development and popularization, now DCS has advanced network architecture, rich controlling software; The design of the man-machine system's connection fully manifests modern sense; The engineering and the maintenance tool are nimble; The communication system is open; The system can adapt many kinds of processes monitoring and process managements. They all provide a broad market demand for the DCS.This article focuses on the design and application of DCS which based on thermal power plant's FGD system to carry on research work. Firstly, combining with reality, the article elaborated the basic principle of thermal power plant's FGD system and the theory of the limestone– gypsum technology. Secondly, it systematically introduced the DCS designation's elementary theory, applicable foundation, level concept and design method.On the basis of fully understanding the DCS and the limestone - gypsum technology, the article combines the DCS designation of a power plant's FGD installment has carried on a more detailed elaboration to the system's demand analysis, network topology, structure and so on, especially to hardware designation, the control system configuration, the contact surface design, the system optimization and so on in system designation. It has also made the elaboration to the system's main function and effect, through designed Xinhua Distributed Processing system-400+ overall frame as well as the system's structure drawing, and logical flow chart of each function module.Finally, the article summarizes experience of the FGD system's DCS controlling, obtains the actual request of the FGD installment's DCS controlling, thus raises the DCS controlling level, enhances the FGD system's available rate. So it doesn't only satisfy the environmental protection request, but also guarantees the power plant's safe operation and the economic yields by the smallest investment and consumption.