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研究了刘桥一矿煤、青龙矿煤、榆林煤,掺入稻草、棉秆、玉米秆3种秸秆类生物质后混合灰熔融特性的变化规律。结果表明:对于高灰熔点刘桥一矿煤和青龙矿煤,掺入3种生物质后,煤灰的流动温度显著降低,掺混比例为30%左右时灰的流动温度降至1380℃以下。稻草的掺入增加了低灰熔点榆林煤灰的流动温度,但在所有掺混比例下,混合灰的流动温度均未高于1300℃。采用多元线性回归分析的方法对灰流动温度与灰成分参数进行拟合,得到了预测生物质与煤混合灰流动温度的方程,并使用鲍店煤掺混生物质的灰分组成对回归方程进行了检验,结果显示28组样品中,96%的灰样流动温度偏差在80℃以内。
The change law of mixed ash fusion characteristics of three kinds of straw biomass, including Liuqiao I coal, Qinglong coal and Yulin coal, and straw, cotton stalk and corn stalk were studied. The results show that the flow temperature of coal ash is significantly reduced for coal with high ash melting point and coal of Qinglong coal mixed with three kinds of biomass, and the flow temperature of ash is reduced below 1380 ℃ when the mixing ratio is about 30% . The incorporation of straw increased the flow temperature of Yulin coal ash with low ash melting point, but the flow temperature of mixed ash did not exceed 1300 ℃ at all the mixing ratios. Multivariate linear regression analysis method was used to fit the parameters of ash flow temperature and ash composition, and the equation of predicting the flow temperature of biomass mixed with coal was obtained. The regression equation was tested by using the ash composition of the biomass mixed with Baodian coal The results showed that in the 28 samples, the deviation of 96% ash flow temperature was within 80 ℃.