(1) Through the comparison and anal

(1) Through the comparison and analysis of the four working conditions, it can be seen that the NOx concentration distribution in the measured furnace is less than 10% of the simulated value, and the region with high NOx concentration corresponds to the high temperature region, conforms to the NOx generation mechanism, and the mathematical model simulation results have a certain degree of accuracy and reliability. It will guide the boiler operate safely and economically.(2) From the analysis of the above four conditions, we can see that with the increase of the opening degree of overfire air baffle, the emission of NOx is curve. When the opening degree is 30%, the NOx emission from the furnace outlet is relatively low. It is conducive to the burning of coal. With the high temperature in the furnace when the opening degree of 70%, the furnace outlet NOx concentration emissions is the lowest, but the furnace temperature level is relatively low, and it also partly affected the boiler thermal efficiency.(3) The effect of overfire airand secondary air volume on NOx generation is very obvious from four working conditions. It can be seen that reasonable overfire airopening and reasonable secondary air ratio are very effective for reducing NOx emissions.