基于热载体焓?的环冷机余热回收段仿真优化  

Simulation and optimization of heat recovery section of annular cooler based on enthalpy exergy of heat carrier

作　　者：张晟[1] 高建业[1] 冯军胜[1] 董辉[1] ZHANG Sheng;GAO Jianye;FENG Junsheng;DONG Hui(SEP Key Laboratory of Eco-industry,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学国家环境保护生态工业重点实验室,辽宁沈阳110819

出　　处：《中南大学学报（自然科学版）》2018年第8期2083-2090,共8页Journal of Central South University:Science and Technology

基　　金："十二五"国家科技支撑计划项目(2015BAB18B00)~~

摘　　要：以环冷机余热回收段为研究对象,基于多孔介质和局部非热力学平衡理论,建立环冷机二维稳态数值计算模型。借助多物理场耦合仿真软件COMSOL,研究并分析进口风速及余热回收段长度对环冷机内烧结矿冷却过程的影响规律。以环冷机出口热载体的焓?为判据,采用全工况分析方法,获得提高环冷机余热回收效果的有效方法。研究结果表明:对于某企业年产量390万t烧结矿的环冷机,适宜冷却气体进口标况流量72万m3/h;最佳余热回收段长度63.00 m。在满足生产工艺的条件下,减小进口风标况流量并同时延长余热回收段长度,可获得更佳的余热回收效果。Heat recovery stage of sinter annular cooler was taken as the research object.Two-dimensional steady-state numerical model of sinter annular cooler was established based on porous media and local thermodynamic equilibrium theory.With the help of multi-physics coupling simulation software COMSOL,the influence laws of inlet air velocity and length of heat recovery stage on sinter cooling process in sinter annular cooler were studied and analyzed.In order to recover more regenerative energy,enthalpy exergy of outlet air was regarded as evaluation index of parameter optimization,and full working condition method was used.The results show that for a sinter annular cooler with 3.9 million annual output,the best operating parameters are as follows.The inlet standard flow of cooling air is 720 000 m3/h,and the length of heat recovery stage is 63.00 m.On the premise of meeting production requirements,decreasing the inlet standard flow of cooling air and extending the length of heat recovery stage can obtain better effect of heat recovery.

关 键 词：烧结 传热 [火用] 数值模拟 优化 

分 类 号：TF046.4[冶金工程—冶金物理化学]