Parameter analysis of atomized droplets sprayed evaporation in flue gas flow

doi:10.1016/j.ijheatmasstransfer.2018.10.023

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	Parameter analysis of atomized droplets sprayed evaporation in flue gas flow
	Feng, Shuqin 1; Xiao, Liehui 1; Ge, Zhihua 1; Yang, Lijun 1; Du, Xiaoze 1,2; Wu, Hongwei 3
刊名	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
	2019-02
卷号	129 页码:936-952
关键词	Flue gas desulfurization wastewater treatment Spray evaporation Atomized droplets Least-Square support vector machine model
ISSN号	0017-9310
DOI	10.1016/j.ijheatmasstransfer.2018.10.023
英文摘要	Spraying flue gas desulfurization (FGD) wastewater into the flue duct is a promising technology to achieve zero emission of wastewater by evaporation in thermal power plants. To deal with the scale and corrosion on flue duct walls resulted from the incomplete droplets evaporation, a combined Eulerian-Lagrangian model was developed to reveal the thermo-fluid behavior of the FGD wastewater spray evaporation in the flue gas. The effects of several control factors under various operating conditions were conducted numerically and validated against experimental data. Because of the complex influences of numerous parameters, the Least-Square support vector machine (LSSVM) model based on numerical results is employed to predict the evaporation rate of droplets. The dominant factors, including that of droplets size distribution, flue gas velocity and flow rate, full cone angle and spray direction of nozzle, were analyzed to reveal their impacts on the droplets sprayed evaporation rate and distance, respectively. It is concluded that spaying droplets in the co-flow direction of flue gas can contribute the dispersion of droplets and enhance the relative movement of two-phase flow, achieving the maximum evaporation rate of droplets. An optimized arrangement of multiple nozzles having a small flow rate is proposed to improve the evaporation rate of droplets. The proposed LSSVM model can expeditiously predict the evaporation rate of droplets along the flue duct with high accuracy. The findings can be used to guide the design of spraying FGD wastewater treatment under practical operating conditions in power plants. (C) 2018 Elsevier Ltd. All rights reserved.
资助项目	Royal Academy of Engineering[DVF1718/8/26]
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000453113500078
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32131]
专题	兰州理工大学能源与动力工程学院
通讯作者	Ge, Zhihua; Du, Xiaoze
作者单位	1.North China Elect Power Univ, Minist Educ, Key Lab Condit Monitoring & Control Power Plant E, Beijing 102206, Peoples R China 2.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Gansu, Peoples R China 3.Univ Hertfordshire, Sch Engn & Technol, Hatfield AL10 9AB, Herts, England
推荐引用方式 GB/T 7714	Feng, Shuqin,Xiao, Liehui,Ge, Zhihua,et al. Parameter analysis of atomized droplets sprayed evaporation in flue gas flow[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2019,129:936-952.
APA	Feng, Shuqin,Xiao, Liehui,Ge, Zhihua,Yang, Lijun,Du, Xiaoze,&Wu, Hongwei.(2019).Parameter analysis of atomized droplets sprayed evaporation in flue gas flow.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,129,936-952.
MLA	Feng, Shuqin,et al."Parameter analysis of atomized droplets sprayed evaporation in flue gas flow".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 129(2019):936-952.