基于辐射管内外耦合传热模拟带钢连退过程的温度均匀性

doi:10.13251/j.issn.0254-6051.2023.06.042

金属热处理 ›› 2023, Vol. 48 ›› Issue (6): 249-257.DOI: 10.13251/j.issn.0254-6051.2023.06.042

基于辐射管内外耦合传热模拟带钢连退过程的温度均匀性

胡野¹, 姜泽毅^1,2, 张欣茹^1,3, 赵延涛¹

1.北京科技大学能源与环境工程学院, 北京 100083;
2.冶金工业节能减排北京市重点实验室, 北京 100083;
3.北京高校节能与环保工程研究中心, 北京 100083

收稿日期:2022-12-21 修回日期:2023-04-25 发布日期:2023-08-11
通讯作者: 姜泽毅,教授,博士,E-mail:zyjiang@ustb.edu.cn
作者简介:胡野(1997—),男,硕士研究生,主要研究方向为工业热过程数值模拟,E-mail:1418203308@qq.com。
基金资助:
国家重点研发计划(2018YFB0605904)

Temperature uniformity of steel strip during continuous annealing process based on internal and external coupled heat transfer simulation of radiant tube

Hu Ye¹, Jiang Zeyi^1,2, Zhang Xinru^1,3, Zhao Yantao¹

1. School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Beijing Key Laboratory for Energy Saving and Emission Reduction of Metallurgical Industry, Beijing 100083, China;
3. Beijing Engineering Research Center for Energy Saving and Environmental Protection, Beijing 100083, China

Received:2022-12-21 Revised:2023-04-25 Published:2023-08-11

摘要/Abstract

摘要： 针对立式带钢连续退火炉内辐射管加热过程带钢温度均匀性问题, 建立了W型辐射管管内流动、燃烧和管内外换热的耦合模型以及带钢内部非稳态导热模型, 模拟研究了辐射管表面温度分布对带钢温度均匀性变化的影响。结果表明, 在带钢升温过程中, 其宽度方向温度呈凹状分布, 这与辐射管两端温度偏高和炉墙的辐射绝热作用有关, 该温差先增大后逐渐减小, 宽度1200 mm的带钢在加热中段时最大温差可达13.6 ℃;带宽方向温差随着带宽的增大先缓慢增大后快速降低;带宽较小时, 带宽方向温差随着功率的增加而增大, 带宽较大时则相反。带宽接近辐射管长度时, 带宽方向温差最小, 可降至5 ℃以内;加热前期, 辐射管表面温度最不均匀, 加热中期, 带宽方向温差最大。

关键词: 退火炉, 带钢, 辐射管加热, 辐射传热, 温度均匀性

Abstract: Aiming at the problem of steel strip temperature uniformity during the heating process of radiant tube in vertical steel strip continuous annealing furnace, a coupled model of flow, combustion and heat transfer inside and outside the tube of W-type radiant tube and an unsteady heat conduction model inside the steel strip were established. The effect of temperature distribution on the surface of the radiant tube on temperature uniformity of the steel strip was studied by simulation. The results show that during the heating-up process of the steel strip, the temperature distribution in the width direction is concave, which is related to the high temperature at both ends of the radiant tube and the radiant adiabatic effect of the furnace wall, the temperature difference increases first and then decreases gradually, and the maximum temperature difference of a 1200 mm wide steel strip in the middle stage of heating can reach 13.6 ℃. The temperature difference in the width direction of the strip increases slowly at first and then decreases rapidly with the increase of the strip width. When the strip width is small, the temperature difference in the width direction increases with the increase of power, and the opposite is true when the strip width is large. When the width of the strip is close to the length of radiant tube, the temperature difference in the width direction of the strip is the smallest, which can be reduced to within 5 ℃. In the early stage of heating, the surface temperature of the radiant tube is the most uneven, and in the middle stage of heating, the temperature difference in the width direction of the strip is the largest.

Key words: annealing furnace, steel strip, radiant tube heating, radiant heat transfer, temperature uniformity

中图分类号:

TK124

胡野, 姜泽毅, 张欣茹, 赵延涛. 基于辐射管内外耦合传热模拟带钢连退过程的温度均匀性[J]. 金属热处理, 2023, 48(6): 249-257.

Hu Ye, Jiang Zeyi, Zhang Xinru, Zhao Yantao. Temperature uniformity of steel strip during continuous annealing process based on internal and external coupled heat transfer simulation of radiant tube[J]. Heat Treatment of Metals, 2023, 48(6): 249-257.

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基于辐射管内外耦合传热模拟带钢连退过程的温度均匀性

Temperature uniformity of steel strip during continuous annealing process based on internal and external coupled heat transfer simulation of radiant tube

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