A Study of a Two-Phase Heat Transfer Mechanism in a Vertical Sintering Cooling Furnace

Weihui Xu, Qinbao Wang, Juan Zhen, Weishu Wang (), Yan Peng, Boyan Tian, Yushuai Ruan and Renjie Li
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Weihui Xu: College of Energy and Power Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Qinbao Wang: College of Energy and Power Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Juan Zhen: College of Energy and Power Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Weishu Wang: College of Energy and Power Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Yan Peng: Citic Heavy Industries Co., Ltd., Louyang 471039, China
Boyan Tian: College of Energy and Power Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Yushuai Ruan: College of Energy and Power Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Renjie Li: College of Energy and Power Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China

Energies, 2024, vol. 17, issue 3, 1-24

Abstract: In order to explore the law of gas–solid countercurrent cooling heat transfer in a vertical sinter cooling furnace at a high temperature, based on the Euler model and the local non-thermodynamic equilibrium theory, an exergy efficiency model was built to evaluate the heat transfer process in the vertical sinter cooling furnace with different parameter changes. It was found that the inlet temperature of cooling air and sinter inlet temperature are the main factors affecting the temperature field and gas–solid heat transfer characteristics in the furnace. Under the conditions of each parameter, the cooling air temperature presents a radial “M” shape distribution. The axial cooling section is the most intense area of gas–solid heat transfer, and this part has the best heat transfer effect. When the inlet temperature of cooling air and the inlet temperature of sinter increase, the outlet temperature of sinter and the outlet temperature of cooling air increase. When the sinter equivalent diameter increases, the cooling air outlet temperature decreases gradually, while the sinter outlet temperature increases gradually. When the diameter and height of the cooling section increase, respectively, the outlet temperature of the sinter decreases and the outlet temperature of the cooling air increases. Based on dimensional analysis, the heat transfer correlation formula suitable for certain test conditions is obtained.

Keywords: high-temperature sintered ore vertical cooling furnace; gas–solid counterflow cooling heat transfer; exergy efficiency model; heat transfer correlation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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