哈密大南湖矿区高钠煤燃烧应用研究

为了优化高钠煤条件下的锅炉运行,提高锅炉安全性与经济性,降低结渣沾污的形成,以660MW超临界机组为研究对象,通过分析国内首台燃用高钠煤的600 MW容量级塔式锅炉的设计特点与运行特性,分析660 MW机组锅炉对高钠煤的适应性,通过试验分析分离器挡板、风煤比、SOFA风、过量空气系数、周界风、配风方式,偏置风及变掺烧方式对相关参数和结渣情况的影响,考虑锅炉效率、结渣、NO_x排放量等因素选择最优值,在此基础上进行大南湖高钠煤的高比例掺烧试验,得出在75%情况下不存在严重结渣情况。

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,NOx 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.