摘要
为了探索环冷机关键结构参数和操作参数对球团冷却效果及过程节能降耗的优化途径,运用双能量方程建立了某球团厂的环冷机球团料层内部气、固相非平衡传热模型,应用"未反应核模型"建立了料层内部的主要化学反应(磁铁矿氧化)的反应速率计算模型,基于Matlab平台实现了对不同操作条件下球团冷却过程的数值仿真。对多个设计工况的仿真结果表明:以球团产量、冷却效果不变为约束,当料层厚度达原厚度的2倍时,环冷机3段排气温度分别提高50、71、33℃,并可节约用风23.6%,即适当增加料层厚度有利于能量回收和节约用风。
To investigate the cooling influence of structural parameters and operating parameters on pellets in rotating annular cooler and the optimization ways for process energy-saving and consumption reduction,a non-equilibrium model of heat transfer between gas and solid in the pellet bed was established with double-energy equation,and the reaction rate model for the main reaction in the material layer（the oxidation of magnetite）was developed with＂unreacted core model＂.Numerical simulations for the pellet cooling process under different operating conditions were carried out with Matlab.The simulation results indicate that under the condition of keeping the product output and cooling effect unchanged,when the pellet bed thickness is twice as large as the original condition,the exhaust temperature of the three segments respectively increases by 50,71,33 ℃ and the air consumption is reduced by 23.6%,that is to say,increasing the material layer thickness properly is beneficial to energy recovery and air consumption reduction.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2015年第6期12-17,共6页
Journal of Iron and Steel Research
基金
国家自然科学基金资助项目(61105080)
湖南省自然科学基金资助项目(11JJ4057)
关键词
球团
环冷机
节能降耗
数值模拟
优化
pellet
rotating annular cooler
energy saving
numerical simulation
optimization
