Parametric optimization of packed bed for activated coal fly ash waste heat recovery using CFD techniques

Kai Liang; Saimeng Jin; Hengzhi Chen; Jingzheng Ren; Weifeng Shen; Shun'an Wei

doi:10.1016/j.cjche.2019.06.004

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Parametric optimization of packed bed for activated coal fly ash waste heat recovery using CFD techniques

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Parametric optimization of packed bed for activated coal fly ash waste heat recovery using CFD techniques
- Parametric optimization of packed bed for activated coal fly ash waste heat recovery using CFD techniques
- 中国化学工程学报（英文版） 2020年28卷第2期页码：518-525
- Affiliations：
  
  1. School of Chemistry and Chemical Engineering, Chongqing University,Chongqing,China,400044
  2. Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University,Hong Kong,China
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2019.06.004
  中图分类号：
- 纸质出版：2020
- Accepted：
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Kai Liang, Saimeng Jin, Hengzhi Chen, 等. Parametric optimization of packed bed for activated coal fly ash waste heat recovery using CFD techniques[J]. 中国化学工程学报（英文版）, 2020,28(2):518-525.

Kai Liang, Saimeng Jin, Hengzhi Chen, Jingzheng Ren, Weifeng Shen, Shun'an Wei. Parametric optimization of packed bed for activated coal fly ash waste heat recovery using CFD techniques[J]. Chinese Journal of Chemical Engineering, 2020, 28(2): 518-525.
Kai Liang, Saimeng Jin, Hengzhi Chen, 等. Parametric optimization of packed bed for activated coal fly ash waste heat recovery using CFD techniques[J]. 中国化学工程学报（英文版）, 2020,28(2):518-525. DOI： 10.1016/j.cjche.2019.06.004.

Kai Liang, Saimeng Jin, Hengzhi Chen, Jingzheng Ren, Weifeng Shen, Shun'an Wei. Parametric optimization of packed bed for activated coal fly ash waste heat recovery using CFD techniques[J]. Chinese Journal of Chemical Engineering, 2020, 28(2): 518-525. DOI： 10.1016/j.cjche.2019.06.004.

摘要

Abstract

Coal fly ash is an industrial solid waste generated from coal preparation during the processing and cleaning of coal for electric power generation. Comprehensive investigation on the reutilization of waste heat of activated coal fly ash is of great economic significance. The method of recovering the waste heat

proposed in this study

is the transfer of heat from activated coal fly ash to gas with the movement of air using the packed bed

providing valuable energy sources for preheating the raw coal fly ash to reduce the overall energy consumption. The investigation is carried on the heat transfer characteristics of gas-solid (activated coal fly ash) phases and air temperature fields of the packed bed under some key conditions

via

computational fluid dynamics. A two dimensional geometry is utilized to represent key parts of packed bed. The distribution mechanism of the temperature field for gas phase is analyzed based on the transient temperature contours at different times. The results show that the obtained rule of gas-solid heat transfer can effectively evaluate the influences of operating parameters on the air temperature in the packed bed. Simultan

eously

it is found that no temperature differences exist in the hot air at the outlet of the packed bed. The investigation provides guidance for the design and optimization of other similar energy recovery apparatuses in industries.

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