烧结矿余热回收竖罐内关键问题研究

Study on key problems of vertical tank for sinter waste heat recovery

针对传统烧结余热回收系统存在着漏风率高、余热回收效率偏低等难以克服的弊端,借鉴干熄炉的结构和工艺,文章首先提出了烧结矿余热竖罐式回收利用的结构和工艺流程,进而阐述了罐式余热回收系统的基本特点,然后提出了影响罐式回收系统可行性的两个关键问题,即竖罐内烧结矿层气流阻力特性和气固传热特性,并采用实验和数值计算的方法对竖罐内的关键问题进行了详细分析。

In view of the drawbacks of traditional sintering waste heat recovery system,such as higher air leakage rate,lower waste heat recovery rate,and so on,the structure and craft process of waste heat recovery and utilization for sinter in vertical tank are proposed by imitating the structure and process of coke dry quenching furnace. The basic features of vertical tank waste heat recovery system are described,and then the two key problems affecting the feasibility of vertical tank are clearly proposed,namely the gas flow resistance characteristics and gas-solid heat transfer characteristics in sinter bed layer of vertical tank. The two key problems of vertical tank are analyzed in detail through the methods of experiment and numerical calculation.