A low-nitrogen combustion control method and system for a pulverized coal boiler based on dynamic air distribution

Abstract

This application relates to the field of boiler combustion technology, and in particular to a low-NOx combustion control method and system for pulverized coal boilers based on dynamic air distribution. It includes: setting multiple monitoring points according to the boiler's structural parameters; acquiring boiler operating condition data according to a preset operating cycle; setting a primary air distribution strategy based on a preset air distribution control model and operating condition data; acquiring feedback data from each monitoring point; and determining whether to generate a correction instruction for the primary air distribution strategy based on all feedback data and a preset feedback correction model. An air distribution control model and a feedback correction model are constructed to improve the response speed to real-time boiler operating conditions, quickly invoke the optimal air distribution scheme, improve the control efficiency of boiler combustion status, and improve the accuracy of monitoring the operating effect of each air volume control model by establishing feedback sub-models for various air volume control indicators. This reduces NOx while maintaining combustion efficiency, saves coal consumption, and reduces the overall operation and maintenance cost of the boiler.

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