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本文对挥发份析出后的煤碳颗粒在三种不同失重模式下燃烧时的流动、传质和传热过程进行了分析,计算了在不同失重模式下的最大失重速率,传输到颗粒的反应热和颗粒温度。通过与以前的理论和实验研究进行对照,指出关于残碳颗粒的失重速率和温度的实验数据并不支持C直接氧化成CO或CO_2这二个失重模式。但对另一失重模式即CO被氧化成CO_2,CO_2再与碳生成CO更为有利。本文的结果可在煤粉燃烧器的数值模拟中完善固相温度方程。本文的分析能包容和解释以前的重要结果,且在理论上较完备和一致。
In this paper, the flow, mass transfer and heat transfer process of coal particles after the volatilization of coal particles were burned in three different weightless modes were analyzed. The maximum weight loss rate under different weightless modes, the reaction heat transfer to the particles And particle temperature. By comparing with previous theoretical and experimental studies, it is pointed out that experimental data on the rate of weight loss and temperature of residual carbon particles do not support the direct oxidation of C to CO or CO 2, two modes of weight loss. However, for another mode of weight loss, CO is oxidized to CO_2, which in turn is more favorable for carbon to form CO. The results of this paper can improve the solid-phase temperature equation in the numerical simulation of pulverized coal burners. The analysis in this paper can accommodate and explain the previous important results, and in theory more complete and consistent.