烧结矿竖罐内气固传热过程数值模拟与优化

以某钢铁企业360 m~2烧结机年产390万t烧结矿为研究对象,建立了竖罐内气固传热过程的数学模型,模拟研究了影响竖罐内气固传热过程的主要因素及其影响规律,得到了竖罐适宜的操作参数.研究结果表明:随着气体表观流速的减小和空气进口温度的增加,烧结矿出口温度和空气出口温度均逐渐增加;烧结矿颗粒直径的减小导致烧结矿出口温度的降低和空气出口温度的增加.竖罐适宜的操作参数为:空气进口标况流量45.5万m~3/h,颗粒当量直径0.025 m,空气进口温度130℃.

Numerical Simulation and Optimization of Gas-Solid Heat Transfer Process in Sinter Vertical Tank

Taking 360m² sintering machine with the annual output of 3900kt sinter in an iron and steel company as a research sample， a mathematical model of gas-solid heat transfer process in sinter vertical tank was established. The main factors affecting the gas-solid heat transfer process in vertical tank and their influence rules were studied through numerical simulation and the suitable operation parameters was determined. The results show that with the decrease of gas superficial velocity and the increase of air inlet temperature， the sinter outlet temperature gradually increases， as well as the outlet temperature of cooling air. The decrease of sinter particle diameter results in the decrease of sinter outlet temperature and the increase of air outlet temperature. The optimal operation parameters of vertical tank are as follows: the air inlet flow under the standard condition is 455000m³/h， the particle equivalent diameter is 0.025m and the air inlet temperature is 130℃.