利用混料试验设计复配煤气化高效助熔剂

Application of mixture experimental design to develop high efficiency flux

为降低皖北LE煤气化过程中煤灰熔融温度,减少助熔剂的添加量,利用混料试验设计对四种助熔剂(A,B,C,D)进行复配,建立各助熔剂配比与流动温度之间的回归模型,确定高效助熔剂的最优配比。结果表明,回归模型高度显著,模型预测的煤灰熔融温度与实测值相差较小;当B∶C∶D=0.5∶0.25∶0.25时,助熔效果最佳;高效助熔剂可显著降低煤灰熔融温度,同时添加量为石灰石助熔剂的1/2时,可使煤灰熔融温度达到煤气化入炉煤的要求。

In order to decrease the LE coal ash fusion temperature,reduce the addition of the flux,four different fluxes （A, B, C, D） were chosen to blend by mixture experimental design ,a mathematical model describing the relationship between the flow temperature and proportion of complex flux was developed to choose the high efficiency flux. The results showed that the predicted value of ash flow temperature obtained from the regression model would have a little difference to the experiment measured value ;when B： C： D = 0.5：0.25：0.25, the high efficiency flux can decrease coal ash melting temperature effectively compared with limestone flux.