钠在煤燃烧初期释放特性的多元相关分析

Multivariate Statistical Analysis on the Behaviour of Sodium ofCoal in the Initial Stage of Combustion

煤燃烧时钠的释放是造成增压流化床(PFBC)烟机腐蚀及锅炉尾部烟道结垢的主要原因。应用多元相关分析参数方法中的偏相关系数法对钠在煤燃烧初期的释放特性进行了研究,结论为钠的各种存在形式之间在煤燃烧初期存在着线性相关性,而这种线性相关性在不同的煤种温度和气氛下有所不同。同时应用回归方法对这种线性相关性进行了描述。

Sodium is largely responsible for the fouling/slagging problems encountered during the combustion of the coals and corrosion/erosion of the blades of gas turbines in PFBC.Multivariate statistical analysis was utilized to determine the linear relations between four modes of occurrence of sodium in the initial stage of combustion.The calculating results of coefficients of partial correlation showed there existed definitely linear relations in these modes,and the relations changed according to the diversities of coal,temperature and ambience.Regression equations were also given to describe these correlations.