CAJ | 학술논문

以自制气固传热实验装置为操作平台，实验研究了烧结矿颗粒填充床内的气固传热特性。结果表明：气体表观流速和烧结矿颗粒直径是影响颗粒床层内气固传热过程的主要因素。气体表观流速越大，颗粒直径越小，床层内气固传热系数就越大。当烧结矿颗粒直径和气体表观流速一定时，床层内烧结矿颗粒温度的升高导致床层气固传热系数的增加和传热Nusselt数的减小。由于计算误差较大，现有的经验关联式不适用于求解烧结矿颗粒床层内的气固传热过程。基于量纲分析法，并结合实验测量数据拟合得出了能够描述烧结矿颗粒床层内气固传热特性的实验关联式，平均计算误差为4.22%，显示了良好的预测性能。
이자제기고전열실험장치위조작평태，실험연구료소결광과립전충상내적기고전열특성。결과표명：기체표관류속화소결광과립직경시영향과립상층내기고전열과정적주요인소。기체표관류속월대，과립직경월소，상층내기고전열계수취월대。당소결광과립직경화기체표관류속일정시，상층내소결광과립온도적승고도치상층기고전열계수적증가화전열Nusselt수적감소。유우계산오차교대，현유적경험관련식불괄용우구해소결광과립상층내적기고전열과정。기우량강분석법，병결합실험측량수거의합득출료능구묘술소결광과립상층내기고전열특성적실험관련식，평균계산오차위4.22%，현시료량호적예측성능。
With a homemade gas-solid heat transfer experimental setup, an experimental study was conducted on gas-solid heat transfer characteristics in a packed bed with sinter particles. The results show that the main factors affecting the gas-solid heat transfer process in sinter bed layer are gas superficial velocity and sinter particle diameter. With the increase of gas superficial velocity and the decrease of sinter particle diameter, the gas-solid heat transfer coefficient increases in the sinter bed. For given gas superficial velocity and sinter particle diameter, higher sinter particle temperature in the bed gives higher gas-solid heat transfer coefficient and lower Nusselt number of heat transfer. Due to the large calculation error, the existing prediction correlations are not suitable for the gas-solid heat transfer process in sinter bed. Based on the method of dimensional analysis, an experimental correlation for describing the gas-solid heat transfer characteristics in sinter bed is obtained by fitting the experimental data, and its mean deviation from experimental data is 4.22%, giving good prediction.