In order to study the effect of combustion optimization adjustment on NOx emission and boiler efficiency,the NOx emission concentration of tail flue in A and B sides was measured by adjusting the excess air coefficient,SOFA wind opening,secondary air distribution mode,surrounding air opening and burner swing angle.Besides,the boiler efficiency was calculated by recording the related data of DCS and collecting samples.Effect of combustion optimization adjustment on NOx emission and boiler efficiency was researched.The results show that NOx concentration can be reduced and higher boiler efficiency can be guaranteed by decreasing oxygen contents.The NOx emission concentration of inverted tower is 9.1% and 7.8% lower than the normal tower and equal distribution wind,respectively.The inverted tower is the lowest and normal tower is the highest.The boiler efficiency increases with the increase of SOFA wind opening and later slightly decreases,while the concentration of NOx increases with the increase of SOFA wind opening.With the increase of surrounding air opening,boiler efficiency firstly decreases and then increases,while the NOx emissions increases gradually.The boiler efficiency changes about 1% with surrounding air opening increasing 7%.The boiler efficiency firstly increases and then decreases with the increase of burner swing angle.
Clean Coal Technology
combustion optimization adjustment
excess air coefficient
air distribution mode
蔡培（1963-），男，安徽合肥人，高级工程师，硕士，主要从事电力试验检测研究。E-mail： caipei3514@ 126. com