Optimization of operating parameters of sinter waste heat vertical tank based on exergy efficiency

被引：0

作者：

Zhang S. ^{[1
]}

Zhao L. ^{[1
]}

Feng J. ^{[2
]}

Dong H. ^{[1
]}

机构：

[1] School of Metallurgy, Northeastern University, Shenyang

[2] School of Environment and Energy Engineering, Anhui Jianzhu University, Hefei

来源：

Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2021年 / 52卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Exergy efficiency; Heat transfer; Moving bed; Numerical simulation; Sinter vertical cooler;

D O I：

10.11817/j.issn.1672-7207.2021.04.025

中图分类号：

学科分类号：

摘要：

Sinter waste heat recovery vertical tanks with an annual output of 2.6 million tons was taken as research objects. Based on the porous medium and local non-thermodynamic equilibrium theory, with the help of the secondary development function of the software, the downward movement process of the sinter particles was defined in the form of convection terms in the energy equation. Thus, a 3D steady-state heat transfer model of the vertical tank was established. An exergy efficiency analysis model for sinter vertical tanks was proposed to study and analyze the main factors influencing the recovery of waste heat and their influencing laws. The results show that as the sinter particle diameter increases, the exergy of the outlet cooling gas and the efficiency of the vertical tank gradually decrease. However, on the contrary, as the cooling gas inlet temperature increases, both gradually increase. Within the scope of the study, with the increase of cooling gas mass flow rate, the exergy and efficiency show a trend of first increasing and then decreasing, and there is a peak inflection point. In the case of different particle diameters, the corresponding peak inflection points are also different. Considering the uneven particle size distribution in actual production, the appropriate cooling gas mass flow should be 89.1-91.2 kg/s. © 2021, Central South University Press. All right reserved.

引用

页码：1287 / 1296

页数：9

共 23 条

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