Practical research of Dananhu high sodium coal combustion in Hami mining

In order to optimize the boiler operation coditionusing high sodium coal and improve the safety and economy of boiler,as well as reduce the slagging formation,a 660 MW supercritical unit was used to test the the adaptability of boiler to high sodium coal,and the design features and operation characteristics of 600 MW class tower type boiler that the first time to use high sodium coal was analyzed.The experiment was carried out to study the influence of separator baffle,the ratio of air to coal,the SOFA (separated over-fire air),excess air coefficient,surrounding air,air distribution mode,deviated air,variable style of blending to related parameters and slagging studied.The optimal value was determined by considering the boiler efficiency,slagging,NO_x and other factors.Accordingly,experiments with a high proportion of blending (75%) Dananhu high sodium were conducted to show that there was less severe slagging.