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中南大学学报(自然科学版)

Journal of Central South University

第48卷    第11期    总第279期    2017年11月

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文章编号:1672-7207(2017)11-3100-08
烧结矿余热回收竖罐内气固传热过程数值分析
冯军胜,董辉,高建业,梁凯,刘靖宇

(东北大学 国家环境保护生态工业重点实验室,辽宁 沈阳,110819)

摘 要: 以某钢铁企业年产390万t烧结矿为研究对象,基于多孔介质理论和局部非热力学平衡双能量方程模型,建立烧结矿竖罐内气固稳态传热模型,并借助Fluent软件及其二次开发平台,以回收的空气热量和空气 为判定基准,对不同操作参数对竖罐内气固传热过程的影响进行模拟研究。研究结果表明:回收的空气热量和空气 随烧结矿入口温度的升高而逐渐增加,随烧结矿颗粒直径的增大而逐渐减少;随着气料比的增加,回收空气热量的增加趋势逐渐变缓,空气 则呈现出先增大后减少的趋势;随着空气入口温度的升高,回收的空气热量逐渐减少,空气 则逐渐增加。在实际操作工况改变时,通过气料比的调节可达到最佳气固换热效果,获得最大的空气 。

 

关键字: 烧结矿;竖罐;多孔介质;气固传热;数值分析

Numerical analysis of gas-solid heat transfer process in vertical tank for sinter waste heat recovery
FENG Junsheng, DONG Hui, GAO Jianye, LIANG Kai, LIU Jingyu

SEP Key Laboratory on Eco-industry, Northeastern University, Shenyang 110819, China

Abstract:Choosing the annual output of 3 900 000 t sinter in an iron and steel company as the subject, the gas solid steady-state heat transfer model in sinter vertical tank was established on the basis of the porous medium theory and the two-equation energy model of local non-equilibrium thermodynamics. By employing Fluent software and the user defined functions (UDF), the recovered air energy and the air exergy were used as the criteria to study the effects of different operation parameters on gas solid heat transfer in vertical tank. The results show that the recovered air energy and the air exergy gradually increase with the increase of sinter inlet temperature, and gradually decrease with the increase of sinter particle diameter. With the increase of gas sinter ratio, the increasing tendency of air energy becomes slower, and the air exergy firstly increases and then decreases. In addition, with the increase of air inlet temperature, the recovered air energy gradually decreases and the air exergy gradually increases. When operation conditions change, optimal gas solid heat transfer performance as well as the maximal air exergy can be achieved through the adjustment of gas sinter ratio.

 

Key words: sinter; vertical tank; porous medium; gas-solid heat transfer; numerical analysis

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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