Study on Spray Evaporation Treatment of Desulfurization Wastewater

doi:10.3390/coatings11040418

	Study on Spray Evaporation Treatment of Desulfurization Wastewater
	Guo, Huiqian 1; Wang, Jing 1; Wu, Jiangbo 2; Du, Xiaoze 1,2
刊名	COATINGS
	2021
卷号	11 期号:4
关键词	flue gas desulfurization wastewater droplet evaporation characteristics atomized droplets experimental evaluation numerical simulation
DOI	10.3390/coatings11040418
英文摘要	Limestone-gypsum wet flue gas desulfurization (WFGD) often produces a certain amount of wastewater with complex water quality and heavy metal pollution which should be treated properly before release. Spaying the desulfurization wastewater into flue duct and using exhausted flue gas heat for evaporation is a promising and economical technology for achieving zero wastewater discharge in thermal power plant. To enable a more in-depth understanding on evaporation of FGD wastewater spray, a visual wind tunnel test rig based on the atomized droplet laser measuring system was built to reveal the impact factors on droplet thermal-fluid behavior. The dominant impact factors such as compressed air pressure and flow rate in air-blast spray nozzle, hot air temperature and velocity in the evaporation tunnel were analyzed to discuss the droplet size distribution and evaporation performance through alternating operate condition. A discrete mathematical model that combines both Eulerian and Lagrangian framework was established to validate the experiment result. It is concluded that introducing high pressure compressed air into the nozzle can contribute to the dispersion of droplets and enhance the evaporation rate. Proper flow rate in spray nozzle is required to avoid incomplete droplets evaporation. Air temperature and velocity in the evaporation tunnel apply positive impact on droplet size distribution and evaporation performance. Numerical simulation results of both dominant factors impact on evaporation behavior and total evaporation rate showed consistency with the experimental outcome.
WOS研究方向	Materials Science ; Physics
语种	英语
出版者	MDPI
WOS记录号	WOS:000642924700001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/148277]
专题	能源与动力工程学院
作者单位	1.North China Elect Power Univ, Key Lab Condit Monitoring & Control Power Plant E, Minist Educ, Beijing 102206, Peoples R China; 2.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Guo, Huiqian,Wang, Jing,Wu, Jiangbo,et al. Study on Spray Evaporation Treatment of Desulfurization Wastewater[J]. COATINGS,2021,11(4).
APA	Guo, Huiqian,Wang, Jing,Wu, Jiangbo,&Du, Xiaoze.(2021).Study on Spray Evaporation Treatment of Desulfurization Wastewater.COATINGS,11(4).
MLA	Guo, Huiqian,et al."Study on Spray Evaporation Treatment of Desulfurization Wastewater".COATINGS 11.4(2021).