基于环冷机冷却能耗最小目标的工艺参数优化

以冷却能耗理论为基础,对460m2环冷机进行周向分段,借助Fluent平台模拟环冷机内部烧结矿热交换过程,获取一个循环内烧结矿多点温度数据,将其与实测数据进行对比,验证了数学模型正确性.针对孔隙率、非余热回收区入口风速、余热回收区气体入口温度和烧结矿料层厚度等工艺参数,采用控制变量法进行单因素的仿真研究,将模拟结果用冷却能耗理论进行分析,得出各参数对环冷机冷却能耗的影响.运用正交实验法分析上述4个参数,得到了环冷机最优化参数设置.研究结果表明:在最优化参数组合下1t烧结矿温度从650℃降至70℃所需标况风量为1851.4m3,比实际工况时减少了27.6％.

Optimization of process parameters based on minimum target of cooling energy consumption of sinter cooler

460 m2 sinter cooler was divided into many segments based on the cooling energy consumption theory,and the process of heat transfer in the sinter cooler was simulated with Fluent software.Temperature data across multiple points was obtained in cycle time,which was compared with test data to validate the correction of the mathematical model.The control variable method was used,based on the single factor,to study the process parameters such as porosity,inlet velocity of non-heat recovery zone,inlet temperature of heat recovery zone,height of sinter layer,and the result of simulation was analyzed with the cooling energy consumption theory to realize the effects of the process parameters on the cooling energy consumption of sinter cooler.The optimized parameters configuration of sinter cooler was acquired by orthogonal experiment method.The results show that:by parameter optimization,1 851.4 m3 air volume is required to cool 1 t sinter from 650 ℃ to 70 ℃,which is reduced by 27.6％ against the actual working condition.