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对2010年某电厂2台亚临界1 025 t/h煤粉锅炉的混煤运行数据进行了计算与分析,得到了混煤的燃料比FR、燃尽度指数BOI、干燥无灰基挥发分Vdaf对锅炉的固体不完全燃烧损作q4和电厂的供电煤耗增加值Δb的影响规律。计算结果表明:随着Vdaf的提高,FR的变化范围是7.3～3.2;BOI的变化范围是3.2～5.5。Δb的变化范围是17～7.0 g/(kW.h)。随着BOI的提高,灰渣含碳量、q4以及由灰渣含碳量引起的Δb降低。q4随着灰渣含碳量的提高而线性提高;Δb随着q4的提高而线性提高。
The coal blending operation data of two subcritical 1 025 t / h pulverized coal fired boilers in a power plant were calculated and analyzed in 2010, and the fuel ratio FR, burnout index BOI, dry ashless base volatile Vdaf The effect of the incomplete combustion loss of the boiler on q4 and the added value of power consumption coal consumption Δb of the power plant. The calculated results show that with the increase of Vdaf, the range of FR is 7.3 ~ 3.2 and the range of BOI is 3.2 ~ 5.5. The range of Δb varies from 17 to 7.0 g / (kW.h). As the BOI increases, the carbon content of the ash, q4, and the Δb due to the carbon content of the ash decrease. q4 increases linearly with the increase of carbon content in ash; Δb increases linearly with the increase of q4.