Optimization Design Of Control System And On-line Monitor Of Low NO Emission Split Type Burner Based On CFD

Burner is the key heating equipment in thermal power industry. How to apply the advanced measurement and control technology to optimize its control in order to realize high efficient combustion and low emission is the main research direction of measurement and control industry in the field of thermal power industry. With the title of “Optimization design of control system and on-line monitor of low NO emission split type burner based on CFD”, the technology of control system optimization based on CFD and the on-line monitoring platform technology based on credible technology are studied systematically in the thesis. Research achievement in this paper has important academic value and practical significance in promoting the development of Subject of Measuring and Controlling, and the merging of Measurement Science, Instrument Science and Computer Science. This paper is supported by the SME Technology Innovation Fund of Guangzhou(2013J4400223) and the Technology Business Incubator Special funds for Development Projects of Guangzhou(2013J4200015).The split type burner system is summarized and systematically analyzed; meanwhile, the research situation of numerical simulation technology of combustion, control of burner and on-line monitoring platform technology based on credible technology which is closely associated with the theme is discussed in the thesis. Integrated with the problems to be solved of the split type burner performance, the optimization program which combined CFD numerical simulation technology, modeling and optimization algorithm based on artificial intelligence, on-line monitoring platform technology based on credible technology is proposed. Main work of this thesis include:(1)Key problems of control and monitoring functions in low NO emission split type burner is analyzed. Key technologies needed in control optimization and monitoring in order to realize high efficient combustion and low emission are analyzed, focused on the burner control optimization and monitoring using advanced computer and measurement and control technology such as CFD numerical simulation, advanced modeling & optimization algorithm, on-line monitoring platform technology based on credible technology, the research has guiding significance in reality application.(2)The split type burner CFD numerical simulation program is explored. The platform combined ICEM, FLUENT and Tecplot360 is firstly built. Combustion mechanism and model is exposited, then the gas combustion flow field under the secondary vortex wind blade opening of 15 ?, 30 ?, 45 ?and primary air content of 5.985%, 7.925% and 15% are respectively carried. Above all, the split type burner control optimization strategy is proposed.(3)The split type burner control system is developed. Based on the analysis of the split type burner control system architectures, the Siemens S7-200 PLC is selected as the control system central controller. And the assistant units such as the operating parameters detection unit, button and the indicator unit, instruction execution unit and the user communication unit is designed. At the same time, based on the control flow chart of the system, the PLC system software tasks are modularly designed. And the control effect test is executed, laying the foundation of the control system in order to realize high efficient combustion and low emission.(4)The optimization control algorithm of split type burner is designed. According to the actual measurement data of low NO emission split type burner’s NOx emissions and operating variables, the mathematical modeling and control parameters optimization of NOx emissions of split type burner based on artificial intelligence algorithms are studied. Comparative study of NOx emissions modeling using squares support vector machines(LSSVM), ELM model and SVR models is implemented. Then the NOx emissions of burner is optimized and analyzed by the application of genetic(GA) algorithm and three GA-based hybrid algorithms. At last, the best real-time optimization control scheme of LSSVM + TSGA is proposed for the split type burner.(5) The real-time monitoring platform of low NO emission split type burner based on credible technology is developed. First the scheme of real-time monitoring system based on credible technology is designed and analyzed. Next the on-line monitoring platform is developed using C# and its SQL database based on SQL Server system is also designed. Through the development of identity authentication module and integrity authentication module, the reliable service function for on-line monitoring platform is realized.