The flue gas analysis system can monitor parameters such as composition,flow rate,and temperature of smelting flue gas.The system control model uses the obtained information to analyze,judge,and control the smelting process,thereby guiding automated smelting.However,from the practical application of flue gas analysis systems in electric furnace steelmaking production,there is a common problem of randomness and fluctuation in flue gas collection data,which makes it difficult for the process analysis and control system to accurately judge and guide the smelting situation inside the electric furnace.To solve related problems,the location of flue gas composition collection has been changed.By obtaining stable flue gas parameters after secondary combustion(with a fluctuation range of-9％～+16％relative to the median of the monitoring value),adding full composition analysis of flue gas including N2,setting up pressure monitoring devices inside the electric furnace,and adding delay compensation for electric furnace flue gas collection,the completeness and accuracy of the data collected by the electric furnace flue gas analysis system have been improved.The output end adopts the integrated value of the flue gas analysis monitoring results after secondary combustion,and the cumulative value of the electric furnace PLC input end has reached a consistency of over 90％,which can accurately guide the automation smelting of the electric furnace.
关键词
烟气分析/采样点/二次燃烧/全成分分析/压力监测/延时性补偿
Key words
flu gas analysis/sampling points/secondary combustion/total component analysis/pressure monitoring/delay compensation
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