基于球团温度软测量的链箅机-回转窑生产过程热工参数优化  

Thermal parameters optimization for grate-kiln production process based on soft measurement of pellet temperature

作　　者：范晓慧[1] 方天任 黄晓贤[1] 陈许玲[1] 王鑫[1] FAN Xiaohui;FANG Tianren;HUANG Xiaoxian;CHEN Xuling;WANG Xin(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China)

机构地区：[1]中南大学资源加工与生物工程学院,湖南长沙410083

出　　处：《钢铁研究学报》2022年第6期514-522,共9页Journal of Iron and Steel Research

基　　金：国家重点研发计划资助项目(2018YFC1900605)。

摘　　要：链箅机-回转窑是中国氧化球团生产的主要工艺,其产量约占球团总产量的60%以上,但由于其连续、封闭、高温的特点,生产过程部分参数无法实时检测,给工艺优化带来困难。因此,应用动态建模的方法,建立了基于物热平衡原理的球团温度软测量模型,再结合[火用]平衡分析方法构建了热工参数优化模型,以系统总[火用]损失最小为目标进行了参数优化。结果表明:采用优化后的热工参数,系统总[火用]损失和燃料消耗量降低,节能效果显著。通过C#语言开发了链箅机-回转窑热工参数优化软件,可实时呈现系统能量分布状态,评价能耗指标,指导生产操作。所开发的软件系统在国内某球团厂获得了应用,取得良好效果。Grate-kiln is the major production process of oxidized pellets in China, its pellet output accounts for more than 60% of the total. However, some state parameters cannot be detected directly due to the continuous, closed, and high-temperature characteristics of the production process, which brings difficulties to the process optimization. A soft measurement model for pellet temperature was established via dynamic modeling methods based on the principles of mass and heat equilibrium. And a thermal parameters optimization model, combined with the exergy balance analysis method, was proposed to optimize the operation parameters with the goal of minimizing the system-wide exergy loss. The optimization results of practical cases show that the optimized thermal parameters are conducive to reducing the total exergy loss and fuel consumption and bring significant energy-saving effects. A software system of thermal parameters optimization is developed via C#, which can show the energy distribution status in real-time, estimate the energy consumption level, and provide operational guidance. This system has been applied in a domestic pellet plant and has played an important role in optimization guidance.

关 键 词：链箅机-回转窑 软测量模型 [火用]分析 热工参数优化 球团矿 

分 类 号：TF046[冶金工程—冶金物理化学]