推舟式连续热处理炉内温度场数值模拟与系统优化  

Numerical simulation and system optimization of temperature field in pusher type continuous heat treatment furnace

作　　者：崔涵焜 张登春 宋石初 陈霖 熊梨 孙丽欢 CUI Han-kun;ZHANG Deng-chun;SONG Shi-chu;CHEN Lin;XIONG Li;SUN Li-huan(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Norbert High Temperature Equipment Co Ltd,Xiangtan 411229,China)

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201 [2]湖南诺伯特高温设备有限公司,湖南湘潭411229

出　　处：《材料热处理学报》2024年第1期175-184,共10页Transactions of Materials and Heat Treatment

基　　金：湖南省自然科学湘潭联合基金(2021JJ50122);2021年湘潭市第三批长株潭国家自主创新示范区建设专项(CG-ZDGS20211005)。

摘　　要：为了提高连续式热处理炉内部温度场的温度均匀性及加热效率,以一种推舟式连续热处理炉为参考进行建模,采用ANSYS FLUENT软件模拟了稳态条件下连续炉内部温度场的分布规律,并将模拟结果与实测结果进行对比分析,最大误差在10%以内。在此基础上,研究加热管直径、管排间距和进气口位置对炉体内部温度均匀性及加热效率的影响,并以此优化加热系统。结果表明,低温加热段适当将上排加热管下移和侧面进气口上移可提高炉体内部温度均匀性和加热效率,改变加热管径对低温段系统影响不大;高温段适当改变管截面尺寸和上移侧面进气口可有效提高炉体内部温度均匀性和加热效率,改变管排间距则对高温段系统影响不大。具体优化方案为:低温加热段加热管直径ϕ60 mm,上排加热管下移300 mm,侧面进气口上移400 mm;高温加热段加热管截面尺寸8 mm×28 mm,侧面进气口上移100 mm。优化后低温段加热工件中心与边缘平均温差由原来的48.5℃降低到30.8℃;高温段由原来的140.8℃降低到16.1℃,显著提高了炉体内部温度均匀性和加热效率。In order to improve the temperature uniformity and heating efficiency of the internal temperature field of continuous heat treatment furnace,a pusher type continuous heat treatment furnace was used as a reference for modeling.ANSYS FLUENT software was used to simulate the distribution of the internal temperature field of the continuous furnace under steady-state conditions.The simulation results were compared and analyzed with the measured results,and the maximum error was within 10%.On this basis,the effects of heating tube diameter,tube row spacing and inlet position on the internal temperature uniformity and heating efficiency of the furnace were studied,and the heating system was optimized accordingly.The results show that appropriately moving the upper row of heating pipes down and the side air inlet up in the low-temperature heating section can improve the temperature uniformity and heating efficiency inside the furnace body,and changing the heating pipe diameter has little effect on the low-temperature section system.Properly changing the cross-sectional size of the tube and moving the side air inlet upwards in the high-temperature section can effectively improve the temperature uniformity and heating efficiency inside the furnace body,while changing the spacing between tube rows has little effect on the high-temperature section system.The specific optimization plan is:the diameter of the heating pipe in the low-temperature heating section isϕ60 mm,move the upper heating tube down by 300 mm,and move the side air inlet up by 400 mm;high-temperature heating section heating pipe cross-sectional size is 8 mm×28 mm,move the side air inlet up by 100 mm.After optimization,the average temperature difference between the center and edge of the heated workpiece in the low-temperature section has been reduced from 48.5℃to 30.8℃;the high-temperature section has been reduced from 140.8℃to 16.1℃,significantly improving the temperature uniformity and heating efficiency inside the furnace body.

关 键 词：连续式热处理炉 数值模拟 温度均匀性 平均温差 系统优化 

分 类 号：TG155.1[金属学及工艺—热处理]