烧结冷却机换热过程数值模拟与废气温度调控

基于FLUENT模拟软件,采用多孔介质模型对烧结矿冷却过程进行数值模拟,获得了烧结矿当量直径、床层空隙率等特性参数和料层厚度、给料温度、冷却介质流速、冷却介质温度等冷却工艺参数对废气温度的影响规律,分析了冷却工艺参数变化对余热锅炉入口废气温度和实际余热回收量的影响。结果表明:热源参数测试是烧结余热回收发电系统精确设计的前提,烧结主生产工艺稳定是烧结余热回收发电系统稳定、高效运行的基础,余热锅炉排烟废气循坏是调控余热锅炉入口废气温度和提高余热回收效率的重要技术手段。

Numerical simulation and exhaust gas temperature regulatory in the heat transfer process of sinter cooling machine

Based on FLUENT simulation software, adopting the porous media model to simulate the sinter cooling process, the effects of sinter characteristic parameters, such as equivalent diameter and bed porosity, and the cooling process parameters, such as bed thickness, sinter temperature, cooling medium flow rate and cooling medium temperature on the temperature of exhaust gas were obtained, the influence of cooling process parameters on the inlet gas temperature of HRSG (heat recovery steam generator) and the actual amount of waste heat recovery were analyzed. The results show that the test of heat source parameters is the basis of exact design of sinter waste heat recovery generating system, the stability of sinter main production processes is the foundation of the stabilization and high efficient operation of the sinter waste heat recovery generating system, and the cycling waste gas of HRSG is the important techniques to adjust the temperature of inlet gas of HRSG and to improve the waste heat recovery efficiency.