Construction of a New Type of Coal Moisture Control Device Based on the Characteristic of Indirect Drying Process of Coking Coal

Ming Yan, Xinnan Song, Jin Tian, Xuebin Lv, Ze Zhang, Xiaoyan Yu and Shuting Zhang
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Ming Yan: School of Environmental Science and Engineering, Tianjin University, Tianjin 300354, China
Xinnan Song: School of Environmental Science and Engineering, Tianjin University, Tianjin 300354, China
Jin Tian: School of Environmental Science and Engineering, Tianjin University, Tianjin 300354, China
Xuebin Lv: School of Environmental Science and Engineering, Tianjin University, Tianjin 300354, China
Ze Zhang: School of Environmental Science and Engineering, Tianjin University, Tianjin 300354, China
Xiaoyan Yu: School of Environmental Science and Engineering, Tianjin University, Tianjin 300354, China
Shuting Zhang: School of Environmental Science and Engineering, Tianjin University, Tianjin 300354, China

Energies, 2020, vol. 13, issue 16, 1-20

Abstract: This paper presents an in-depth study on the indirect drying characteristics and interface renewal. By comparing the drying rate curve, it is found that shortening the surface drying stage, which contains a repeated evaporation-diffusion-condensation process of moisture, is the key to improve the total drying efficiency. By stirring the coal and realizing the interface renewal between the bottom layer and the surface layer, the drying efficiency reached seven times than that of static indirect drying. Based on indirect heat transfer with high heat and mass transfer rate, a new type of indirect heat transfer moving bed coal moisture control device is designed. At the same time, Fluent fluid mechanics software is used for mathematical modeling and simulation experiments. It is proved that the designed moving bed coal moisture control device has a good application prospect in coal pre-drying technology.

Keywords: moisture; coal pre-drying; heat; mass; drying kinetics (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: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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