新型两级气浮旋流设备结构优化与性能研究
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摘要
为使现有的两级气浮旋流设备作用效果更佳,利用流体分析软件Fluent6.3.26对其进行结构优化和性能研究。研究结果表明,在一定的入口流量下,存在最优一级旋流管径,该管径可使一级油水分离效果最优;两级气浮旋流设备中罐的旋流流场由弯头决定,当弯头的轴向位置离罐底较高时,可使含油污水充分经过气浮作用而得到净化;弯头离轴心的最佳径向位置约为半径的0.36倍,这样可使油水分离性能最佳;当两级气浮旋流设备的最佳入口流速小于2 m/s时,可使油水分离性能最优。现场试验结果表明,新型两级气浮旋流设备能将污水中含油体积分数降到20.00×10~(-6)以下,说明新型两级气浮旋流设备能够进行有效的污水处理,这对我国自主研发气浮旋流处理含油污水技术具有积极的促进作用。
To improve the separation performance of the current two-stage air-flotation cyclone,structure optimization and performance study have been conducted by using fluid analysis software Fluent6. 3. 26. The results show that the optimal one-stage cyclone pipe diameter could be attained at certain inlet flow to achieve optimal oilwater separation. The cyclone flow field in a two-stage air-flotation cyclone is determined by the bend. A higher bend axial position from the bottom of the tank could achieve a better separation performance by fully air-flotation. The optimal radial position of bend is about 0. 36 times the tank radius. The optimal inlet flow rate is less than 2 m / s.Field test results show that the new two-stage air-flotation cyclone could reduce the oil volume fraction to 20. 00 ×10~(-6),presenting an effective wastewater treatment. The study results provide positive effects on independent development of air-flotation cyclone for oily water treatment.
To improve the separation performance of the current two-stage air-flotation cyclone,structure optimization and performance study have been conducted by using fluid analysis software Fluent6. 3. 26. The results show that the optimal one-stage cyclone pipe diameter could be attained at certain inlet flow to achieve optimal oilwater separation. The cyclone flow field in a two-stage air-flotation cyclone is determined by the bend. A higher bend axial position from the bottom of the tank could achieve a better separation performance by fully air-flotation. The optimal radial position of bend is about 0. 36 times the tank radius. The optimal inlet flow rate is less than 2 m / s.Field test results show that the new two-stage air-flotation cyclone could reduce the oil volume fraction to 20. 00 ×10~(-6),presenting an effective wastewater treatment. The study results provide positive effects on independent development of air-flotation cyclone for oily water treatment.
引文
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[2]陈家庆,韩旭,梁存珍,等.海上油田含油污水旋流气浮一体化处理设备及其应用[J].环境工程学报,2012,6(1):87-93.
[3]王波,陈家庆,梁存珍,等.含油废水气浮旋流组合处理技术浅析[J].工业水处理,2008,28(4):87-92.
[4]白志山,汪华林,裴世瑜,等.用于含油污水处理的气浮旋流耦合技术研究[J].环境污染治理技术与设备,2006,7(8):86-89.
[5]吴应湘,许庆华,许晶禹,等.一种旋流气浮油水分离装置及气浮发生器:中国,201210122331[P].2012.
[6]陈昌军,张旭辉,陈小珍.一种旋流气浮分离器:中国,201310087990[P].2013.
[7]孙莉英,杨昌柱.含有废水处理技术进展[J].华中科技大学学报:城市科学版,2002,19(3):87-91.
[8]谢文志.含油废水处理用旋流气浮装置:中国,201120322473.5[P].2011-08-31.
[9]蒋惟光.一体化多功能气浮净化器:中国,200910184057.0[P].2009-08-12.
[10]简小文,郭勇,郝海保,等.气浮水处理技术新进展[J].油气田地面工程,2012,31(3):49-50.
[11]简小文,郝海保,张瑞革,等.一种旋流器及气浮选装置:中国,201120242914.0[P].2011-07-11.
[12]何泽慧,陈方非.溶气式微旋流式气浮污水处理装置:中国,201120037022.7[P].2011-02-12.
[13]马立峰,樊燕,王守波.一种压力式气浮分离装置:中国,201010290566.4[P].2010-09-19.
[14]马立峰,樊燕,王守波.一种带微细气泡含油水的发生装置:中国,200810120804.X[P].2008-09-05.
[15]吴应湘,魏丛达,许晶禹,等.一种含油污水旋流气浮分离装置:中国,201310245879[P].2013.
[16]孟宪坤,龙涛,胡润宇,等.基于计算流体动力学软件的气旋浮流场分析[J].机械,2010,37(6):5-7.
[17]李琳,邱秀云,龚守远,等.浑水水力分离清水装置弱旋流场特性研究[J].水动力学研究与进展,2007,22(4):520-528.
[18]Shen Xiaojun,Chen Qingru,Li Shuyan.Velocity and pressure distributions characteristics of coal slurry in floatation cyclone[J].Procedia Earth and Planetary Science,2009,1:814-818.
[19]Deng Xiaowei,Liu Jiongtian,Wang Yongtian,et al.Velocity distribution of the flow field in the cyclonic zone of cyclone-static micro-bubble flotation column[J].International Journal of Mining Science and Technology,2013,23:89-94.
[20]韩旭,陈家庆,李锐锋,等.含油污水处理用旋流气浮一体化设备的CFD数值模拟[J].环境工程学报,2012,6(4):1087-1092.
[21]唐家鹏.FLUENT 14.0超级学习手册[M].北京:人民邮电出版社,2013.
[22]Bridgemana J,Jeffersonb B,Parsons S.Assessing floc strength using CFD to improve organics removal[J].Chemical Engineering Research and Design,2008,86(8):941-950.