Water film area and dust removal efficiency of string grilles:a theoretical analysis
Hua Guo1
Haiqiao Wang2
Shiqiang Chen3
Zhirong Wu2
1.School of Resource,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China;School of Civil and Environmental Engineering,Hunan University of Science and Engineering,Yongzhou 425199,Hunan,China2.School of Resource,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China3.Hunan Provincial Engineering Techniques Research Centre of Mine Ventilation and Dedusting Equipment,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China;Work Safety Key Lab On Prevention and Control of Gas and Roof Disasters for Southern Coal Mines,Hunan University of Science and Technology,Xiangtan 411201,Hunan,China
摘要：Based on multiphase flow theory and capillary mechanics,the dimensionless bond number expression of the influence of string grille wire spacing on droplet spreading is derived.Taking a liquid film formed by spreading droplets based on Kelvin correlation,the Young-Laplace equation,and the Hagen-Poiseuille law,an equation for calculating the thickness and height of the liquid film is established with temperature,relative humidity and molar volume of liquid phase as independent variables.According to the theory of string grille filtration and dust removal,a dust removal efficiency calculation model covering the wet string grille wire group is constructed based on the liquid film thickness,height,wire diameter,water film area,and vortex shedding frequency.Finally,a theoretical analysis of the influence of water film area on the efficiency of wet siring grille dust removal is carried out based on the spray pressure and the ratio of string grille wire distance to wire diameter.It is found that the effect of spray pressure on water film area and dust removal efficiency is more significant than the string grille wire distance diameter ratio.Moreover,the optimized combination of wet string grille wire distance diameter ratio 0.84,wind speed 3 m/s and spray pressure 0.8 MPa is found,which could provide an important reference for engineering applications.
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论文发表日期：2021-10-28
在线出版日期：2025-08-15（本平台首次上网日期，不代表文献的发表时间）
页数：10( 1015-1024 )
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