湿雾抑尘内混式空气雾化喷嘴的选型
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摘要
针对工业粉尘控制问题,在稳态喷雾实验台上对多孔空气雾化喷嘴和扇形空气雾化喷嘴的雾化性能进行实验研究。结果发现,在喷嘴入口水压和空气压力一定的实验条件下,扇形喷嘴具有更大的喷雾锥角,但多孔喷嘴的液滴索特平均直径SMD明显低于扇形喷嘴;多孔喷嘴的雾化锥角和SMD随水流量变化基本保持稳定,液体质量在抑尘平面位置分布均匀,而扇形喷嘴的雾化锥角和SMD随水流量增加而明显增大,在抑尘位置液滴质量分布差异显著。综合来看,多孔空气雾化喷嘴的雾化效果优于扇形空气雾化喷嘴。
According to the requirements for industrial dust control,experimental research was performed on a steady spray test platform to compare the atomization properties between a multihole air blast atomizer and a fanshaped air blast atomizer. The results show that under the conditions of constant water inlet pressure and air inlet pressure,the fan-shaped atomizer exhibits a wider spray angle than does the multihole atomizer,while the droplet Sauter mean diameter( SMD) for the multihole nozzle is significantly smaller than that of the fan-shaped nozzle. As the water flow rate increases,the multihole atomizer maintains a stable spray angle and SMD,and the mass distribution of the injected water is fairly uniform in the dust suppression plane. In contrast,for the fanshaped atomizer case,the spray angle and SMD both increase markedly with an increase in the water flow rate,and the liquid mass distribution differs dramatically with dust suppression position. Overall,the multihole atomizer exhibits superior atomization properties as compared with the fan-shaped atomizer.
According to the requirements for industrial dust control,experimental research was performed on a steady spray test platform to compare the atomization properties between a multihole air blast atomizer and a fanshaped air blast atomizer. The results show that under the conditions of constant water inlet pressure and air inlet pressure,the fan-shaped atomizer exhibits a wider spray angle than does the multihole atomizer,while the droplet Sauter mean diameter( SMD) for the multihole nozzle is significantly smaller than that of the fan-shaped nozzle. As the water flow rate increases,the multihole atomizer maintains a stable spray angle and SMD,and the mass distribution of the injected water is fairly uniform in the dust suppression plane. In contrast,for the fanshaped atomizer case,the spray angle and SMD both increase markedly with an increase in the water flow rate,and the liquid mass distribution differs dramatically with dust suppression position. Overall,the multihole atomizer exhibits superior atomization properties as compared with the fan-shaped atomizer.
引文
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[2]ABDUL-WAHAB S A.Impact of fugitive dust emissions from cement plants on nearby communities[J].Ecological Modelling,2006,195(3/4):338-348
[3]CHAN J,COOKE J,HORVATH T,et al.Dust suppression of phosphate rock:Storage,conveyance and shipping[J].Procedia Engineering,2012,46:213-219
[4]NIREL R,MAIMON N,FIREMAN E,et al.Respiratory hospitalizations of children living near a hazardous industrial site adjusted for prevalent dust:A case-control study[J].International Journal of Hygiene and Environmental Health,2015,218(2):273-279
[5]FABIANO B,CURRO F,REVERBERI A P,et al.Coal dust emissions:From environmental control to risk minimization by underground transport.An applicative case-study[J].Process Safety and Environmental Protection,2014,92(2):150-159
[6]HOEFLINGER W,FASCHINGLEITNER J.Evaluation of primary and secondary fugitive dust suppression methods using enclosed water spraying systems at bulk solids handling[J].Advanced Powder Technology,2011,22:236-244
[7]HEFLINGER W,FASCHINGLEITNER J,MAUSCHITZ G.,et al.Influence of water evaporation on dust minimization efficiency using enclosed water spraying systems[C]∥Proc.6 th International Conference for Conveying and Handing of Particulate Solids(CHOPS).Brisbane,2009
[8]CHARINPANITKUL T,TANTHAPANICHAKOON W.Deterministic model of open-space dust removal system using water spray nozzle:Effects of polydispersity of water droplet and dust particle[J].Separation and Purification Technology,2011,77(3):382-388
[9]马素平,寇子明.喷雾降尘机理的研究[J].煤炭学报,2005,30(3):297-300
[10]张淑荣,尹洪超.空气雾化燃油喷嘴的喷雾数值模拟[J].能源技术,2007,28(1):14-16
[11]蒋斌,王子云,付祥钊,等.内混式扇形空气雾化喷嘴参数研究[J].化工进展,2011,30(2):269-274
[12]曹建明,朱辉,郭广祥,等.空气助力改善液滴雾化质量的研究[J].实验流体力学,2013,27(1):56-60
[13]侯凌云,侯晓春.喷嘴技术手册.2版[M].北京:中国石化出版社,2007
[14]马中飞.工业通风与防尘[M].北京:化学工业出版社,2007
[15]吴丹,许雁超,李志华,等.干雾抑尘技术在庙沟铁矿的应用[J].矿业工程,2012,10(5):50-52