用新型螺旋射流气浮机处理含油废水试验研究
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摘要
针对传统射流气浮机在废水处理过程中存在气体吸入量低、溶气效果差、溶气罐占地大等问题,以双膜理论、溶质渗透理论、表面更新理论为依据,采用螺旋喷嘴、旋转叶轮刀片和Z型板混合器等构件,对传统射流气浮机的气水混合、气泡重组与破碎方式进行优化。工程应用结果表明,改进后的螺旋射流气浮机在处理含油废水时,油去除率可达97.5%,效果较好,可在含油废水处理领域推荐使用。
There are some problems during treating wastewater by traditional jet flotation machine,such as low air suction capacity,low air-dissolving efficiency,and big air tank.Based on the two-film theory,penetration theory and surface renewal theory,a new high-efficiency spiral jet flotation machine with spiral nozzle,rotating impeller blade and Z shaped baffle mixer was developed and the steam-water mixing efficiency,the bubble recombined and broken way were optimized.The engineering application results show that the oil-removal efficiency of the machine can reach 97.5% with higher than the traditional flotation machine.The spiral jet flotation machine can be used to treat oil-containing wastewater.
There are some problems during treating wastewater by traditional jet flotation machine,such as low air suction capacity,low air-dissolving efficiency,and big air tank.Based on the two-film theory,penetration theory and surface renewal theory,a new high-efficiency spiral jet flotation machine with spiral nozzle,rotating impeller blade and Z shaped baffle mixer was developed and the steam-water mixing efficiency,the bubble recombined and broken way were optimized.The engineering application results show that the oil-removal efficiency of the machine can reach 97.5% with higher than the traditional flotation machine.The spiral jet flotation machine can be used to treat oil-containing wastewater.
引文
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[15]罗小明,付浩,潘悦文,等.低强度旋流气浮处理含油污水实验研究[J].中国石油大学学报(自然科学版),2016,40(3):149-154.
[2]吴青谚,向波,夏仙满,等.湿法冶金工艺中的除油技术[J].湿法冶金,2017,36(4):251-256.
[3]章华丽,梅荣武.气浮+生化+气浮提标改造工艺处理印染废水工程实例[J].水处理技术,2016,42(9):133-136.
[4]安彩红,杨宏丽,董连平,等.旋流-射流分选充气器充气性能的试验研究[J].选煤技术,2009(3):1-3.
[5]赵步超.一种用于油田水处理的新型溶气设备的研究[J].环境工程,2014,32(1):60-63.
[6]高激飞,顾国维,张亚雷,等.射流曝气器的改进与发展[J].净水技术,2005,24(4):43-46.
[7]陈福泰,胡德智,栾兆坤,等.射流曝气器研究进展[J].环境污染治理技术与设备.2002,3(2):76-80.
[8] ZAHRADNK J,FIALOVM,LINEK V,et al.Dispersion efficiency of ejector-type gas distributors in different operating modes[J].Chemical Engineering Science,1997,52(24):4499-4510.
[9] HAVELKA P,LINEK V,SINKULE J,et al.Effect of the ejector configuration on the gas suction rate and gas hold-up in ejector loop reactors[J].Chemical Engineering Science,1997,52(11):1701-1713.
[10] CRAMERS P H M R,BEENACKERS A A C M.Influence of the ejector configuration,scale and the gas density on the mass transfer characteristics of gas-liquid ejectors[J].Chemical Engineering Journal,2001,82(1/2/3):131-141.
[11] WHITMAN W G.The two film theory of gas absorption[J].International Journal of Heat&Mass Transfer,1924,5(5):429-433.
[12] HIGBIE R.The rate of absorption of a pure gas into a still liquids during a short time of exposure[J].Transactions of the American Institute of Chemical Engineers,1935,31(1):365-389.
[13] DANCKWERTS P V.Significance of liquid-film coefficients in gas absorption[J].Insights Into Chemical Engineering,1981,43(6):51-75.
[14]陈福泰,左华,李久义,等.新型气浮装置ES-DAF中气泡粒径分布的表征[J].环境科学,2004,25(1):111-113.
[15]罗小明,付浩,潘悦文,等.低强度旋流气浮处理含油污水实验研究[J].中国石油大学学报(自然科学版),2016,40(3):149-154.