Application and Effect Analysis of Different Types of Heating Furnaces in SCR Denitrification System
Due to the characteristics of large flow fluctuations,low flue gas temperature,complex flue gas composition,and high oxygen content in the sintering flue gas of the steel industry,the semi-dry desul-furization+SCR denitrification has become the mainstream process for achieving ultra-low emissions in the steel industry sintering flue gas desulfurization and denitrification.Among them,the SCR denitrification re-action must reach the active temperature window of the key equipment catalyst,which requires the use of a heating furnace for flue gas heating.During this process,gas consumption is high and energy consumption is high,making it the largest link in the operating cost of sintering flue gas desulfurization and denitrification.There are three sets of sintering machines in a steel plant,and three different types of heating furnaces are used.By analyzing the application effects of different types of heating furnaces in SCR denitrification sys-tems,a type of heating furnace with higher thermal efficiency has been proposed,which has theoretical guidance significance for the selection and transformation of heating furnaces.In the current context of ener-gy conservation and carbon reduction,the renovation of the original external heating furnace has reduced the gas consumption of the sintering flue gas SCR denitrification system,resulting in a about 12.44%reduc-tion in gas consumption and significant energy-saving and consumption reduction effects.
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