A Method of Predicting the Combustion Status of Pulverized Coal-Fired Boiler Using Furnace Negative Pressure

The change in combustion state in the furnace is necessarily reflected in the furnace negative pressure, and the correlation between combustion state and furnace negative pressure inside the furnace is important for the normal operation of the boiler to be established between typical combustion conditions such as normal ignition, ignition delay and extinction of pulverized coal flame. In this paper we have analysed the relationship between the furnace negative pressure and the main parameters of the boiler based on the analysis of the variation of the furnace negative pressure reflecting the combustion state in the furnace of pulverized coal boiler, using statistical techniques, and establishes a method to estimate the steady state of combustion in the furnace. The proposed method is particularly suited to the characteristics of pulverized coal boiler furnaces fuelled by low-load combustion and low-rank coal, and has important practical significance.