Abstract:Abstract:Aiming at problem of low recovery rate of residual heat of sintering ring cooler, the exergy analysis method was used to establish the exergy efficiency model for evaluating the operating efficiency of the waste heat recovery system of a sintered ring cooler in a steel plant. Based on porous medium model, local nonthermal equilibrium equation and real gas SRK equation, the gassolid twophase heat transfer model in the ring cooler was established. Through the CFD simulation, the influence law of the operating parameters of the three controllable ring coolers on the exergy efficiency of the layer height, cooling gas temperature and inlet gas speed were investigated, the results show that the exergy efficiency increases by 0.8%-1.1% for each 0.1m increase in layer height from 1 m to 1.5 m, efficiency increases by 1.4%-1.5% for every 10℃ increase in gas temperature between 100℃ and 140℃ and increases by 0.18%-0.24% for every 0.1m/s increase in gas speed between 0.9m/s and 1.9m/s. On this basis, bases on the industrial operation data, the orthogonal experiment optimization model of enthalpy efficiency is established, which improves the exergy efficiency of the residual heat recovery system by 3.42%.
夏建芳,余媛君,王潇杰,刘寒. 基于效率目标的环冷机余热回收系统操作参数优化[J]. 钢铁研究学报, 2019, 31(7): 637-643.
XIA Jian-fang,YU Yuan-jun,WANG Xiao-jie,LIU Han. Research on operation parameters optimization of sinter cooler waste heat recovery system based on exergy efficiency optimization. JOURNAL OF IRON AND STEEL RESEARCH , 2019, 31(7): 637-643.