表面活性剂影响下细水雾吸附细颗粒物特性的试验
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摘要
为了探讨细水雾吸附细颗粒物的机理,利用含有风送结构的喷雾系统对表面活性剂影响下不同粒径细水雾脱除细颗粒物特性进行了试验研究,获得了液滴粒径、表面活性剂质量浓度及风送速度对细水雾降尘率的影响规律.结果表明:细水雾降尘率随着水雾粒径的减小先提高后下降,存在最大降尘率;在纯水中添加表面活性剂能大幅提高不同粒径水雾对细颗粒物的降尘率,且粒径越小提升效果越明显;随着溶液中表面活性剂质量浓度的增大,降尘率基本呈上升趋势,同时当水雾粒径较大时,低速风送对纯水及表面活性剂溶液的降尘率均有提升效果.
To explore the adsorption mechanism of fine particles by fine water mist,the experiment of dust removal characteristics by fine water mist with surfactant was conducted by the spray system with air blowing structure. The effects of droplet size,surfactant concentration and wind speed on the dust control rate were discussed. The experimental results show that with the decreasing of droplet size,the dust control rate increases first with latter decreasing,and there is dust control rate peak. The surfactant solution can markedly improve the rate for different droplets size. The smaller the droplet size is,the more marked the effect is. With the increasing of surfactant mass concentration,the dust control rate is mainly on the rise.The low wind speed is conducive to dust control rate for both pure water and water with surfactant.
To explore the adsorption mechanism of fine particles by fine water mist,the experiment of dust removal characteristics by fine water mist with surfactant was conducted by the spray system with air blowing structure. The effects of droplet size,surfactant concentration and wind speed on the dust control rate were discussed. The experimental results show that with the decreasing of droplet size,the dust control rate increases first with latter decreasing,and there is dust control rate peak. The surfactant solution can markedly improve the rate for different droplets size. The smaller the droplet size is,the more marked the effect is. With the increasing of surfactant mass concentration,the dust control rate is mainly on the rise.The low wind speed is conducive to dust control rate for both pure water and water with surfactant.
引文
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[2]张小艳.微细水雾除尘系统设计及试验研究[J].工业安全与环保,2001,27(8):1-4.ZHANG X Y.Design and experimental study of dusting system by fine water-spray[J].Industrial Safety and Environmental Protection,2001,27(8):1-4.(in Chinese)
[3]LI Q Z,LI B Q,ZHAO S,et al.Surface physical properties and its effects on the wetting behaviors of respirable coal mine dust[J].Powder Technology,2013,233:137-145.
[4]LIU Y M,XU Y Y,LI S D,et al.Experimental study on wettability of coal dust in addition of surfactants[J].Applied Mechanics and Materials,2014,448:1403-1407.
[5]曾康生,胡乃联,程卫民,等.综放工作面湿润剂喷雾降尘机理及高效降尘润湿剂的试验[J].煤炭学报,2009,34(12):1675-1680.ZENG K S,HU N L,CHENG W M,et al.Dedusting mechanism by water-cloud of wetting agents and the relevant tests for fully-mechanized and roof caving coal face[J].Journal of China Coal Society,2009,34(12):1675-1680.(in Chinese)
[6]REN T X,PLUSH B,AZIZ N.Dust controls and monitoring practices on Australian longwalls[J].Procedia Engineering,2011,26:1417-1429.
[7]朱良,周刚,孙明东,等.喷雾降尘用化学除尘剂的实验研究[J].煤炭工程,2014,46(9):96-98.ZHU L,ZHOU G,SUN M D,et al.Experiment study on chemical dedusting agent for spraying dust control[J].Coal Engineering,2014,46(9):96-98.(in Chinese)
[8]DING C,NIE B S,YANG H,et al.Experimental research on optimization and coal dust suppression performance of magnetized surfactant solution[J].Procedia Engineering,2011,26:1314-1321.
[9]周刚.综放工作面喷雾降尘理论及工艺技术研究[D].青岛:山东科技大学,2009.
[10]国家质量监督检验检疫总局.室内空气质量标准:GB T18883—2002[S].北京:中国标准出版社,2003.
[11]MOHAN B R,JAIN R K,MEIKAP B C.Comprehensive analysis for prediction of dust removal efficiency using twin-fluid atomization in a spray scrubber[J].Separation and Purification Technology,2008,63:269-277.
[12]YANG J,WU X K,GAO J G,et al.Surface characteristics and wetting mechanism of respirable coal dust[J].Mining Science and Technology,2010,20:365-371.
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