Numerical Study on Particulate Fouling Characteristics of Flue with a Particulate Fouling Model Considering Deposition and Removal Mechanisms

Peng Liu (), Wei Liu, Kexin Gong, Chengjun Han, Hong Zhang, Zhucheng Sui and Renguo Hu
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Peng Liu: School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
Wei Liu: School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
Kexin Gong: School of Mechanical and Power Engineering, Shenyang University of Chemical Technology, Shenyang 110142, China
Chengjun Han: Dalian Huarui Heavy Industry Group Co., Ltd., Dalian 116013, China
Hong Zhang: Dalian Huarui Heavy Industry Group Co., Ltd., Dalian 116013, China
Zhucheng Sui: Dalian Huarui Heavy Industry Group Co., Ltd., Dalian 116013, China
Renguo Hu: Dalian Huarui Heavy Industry Group Co., Ltd., Dalian 116013, China

Energies, 2022, vol. 15, issue 22, 1-22

Abstract: Due to a large amount of particulate matter in industrial flue gas, the formation of particulate deposits on the flue wall will increase the instability of equipment operation, which needs to be solved urgently. In this paper, a numerical investigation on the characteristics of particulate deposition and removal in the furnace flue was carried out for waste heat and energy recovery. This research adopted a comprehensive fouling model combined with the discrete phase model (DPM) which was performed by the CFD framework and extended by user-defined functions (UDFs). Firstly, the particulate deposition and removal algorithms were proposed to develop the judgment criterion of particle fouling based on the Grant and Tabakoff particle–wall rebound model and the Johnson–Kendall–Roberts (JKR) theory. This model not only considered the particles transport, sticking, rebound, and removal behaviors, but also analyzed the deposition occurring through the multiple impactions of particles with the flue wall. Then, the influence of furnace gas velocity, particle concentration, and inflection angle α of the tee section on the particulate fouling were predicted. The results show that the furnace gas velocity, particle concentration, and flue structure have significant effects on particle fouling and distribution, and the particle fouling mainly occurs in the blind elbow section and the tee sections of the flue. In addition, the fouling mass of particles decreases with an increasing furnace gas velocity and the decrease in particle concentration. Lastly, the fouling mass of particles decreases with the increase in the inflection angle α of the tee section, and the location of particle fouling gradually transfers from the blind elbow section to the tee section.

Keywords: particulate fouling; particulate removal; electric furnace; heat and mass transfer; gas-solid two-phase (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: 2022
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