锥盘旋流澄清器澄清性能研究
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摘要
为解决传统煤炭矿井水处理工艺成本高、设备占地面积大等问题,提出并设计了一种锥盘旋流澄清器,采用CFD技术对锥盘旋流澄清器内部流场进行了数值模拟,研究进料速度和锥盘插入深度对其澄清性能的影响,并进行了试验验证。结果表明:在一定范围内,增大锥盘插入深度,可以适当增加湍动能,从而提高澄清性能;适当增大进料速度也可增加湍动能,但是进料速度超过1.6m/s时,湍动能过大,对絮体扰动作用过大,反而不利于澄清性能的提高。当进料速度为1.6m/s,锥盘插入深度为400mm时,固体悬浮物去除率可达92.1%,浊度去除率可达59.8%。
In order to solve the problems of the traditional coal mine water treatment process with high cost and large equipment occupation area,a cone-disk cyclone clarifier is proposed and designed.The CFD technology is used to numerically simulate the internal flow field of the cone-disk cyclone clarifier.The influence of material speed and cone insertion depth on its clarification performance is verified by experiments.The results show that within a certain range,increasing the insertion depth of the cone disk can increase the turbulent kinetic energy to improve the clarification performance;increasing the feed rate can also increase the turbulent kinetic energy,but when the feed rate exceeds 1.6 m/s,if the kinetic energy is too large,the disturbance effect on the flocs is too large,which is not conducive to the improvement of the clarification performance.When the feed rate is 1.6 m/s and the cone insertion depth is 400 mm,the solid suspended matter removal rate can reach 92.1% and the turbidity removal rate can reach 59.8%.
In order to solve the problems of the traditional coal mine water treatment process with high cost and large equipment occupation area,a cone-disk cyclone clarifier is proposed and designed.The CFD technology is used to numerically simulate the internal flow field of the cone-disk cyclone clarifier.The influence of material speed and cone insertion depth on its clarification performance is verified by experiments.The results show that within a certain range,increasing the insertion depth of the cone disk can increase the turbulent kinetic energy to improve the clarification performance;increasing the feed rate can also increase the turbulent kinetic energy,but when the feed rate exceeds 1.6 m/s,if the kinetic energy is too large,the disturbance effect on the flocs is too large,which is not conducive to the improvement of the clarification performance.When the feed rate is 1.6 m/s and the cone insertion depth is 400 mm,the solid suspended matter removal rate can reach 92.1% and the turbidity removal rate can reach 59.8%.
引文
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[5]何绪文,李福勤.煤矿矿井水处理新技术及发展趋势[J].煤炭科学技术,2010,38(11):17-22.HE Xuwen,LI Fuqin.New technology and development trend of coal mine water treatment[J].Journal of Coal Science and Technology,2010,38(11):17-22.
[6]尹星,吴支超,王志伟,等.MBR-纳滤组合工艺在生活污水和大型超市污水处理中的研究[J].环境工程学报,2010,4(1):121-124.YIN Xing,WU Zhichao,WANG Zhiwei,et al.Study on MBR-nanofiltration combined process in domestic sewage and large-scale supermarket wastewater treatment[J].Journal of Environmental Engineering,2010,4(1):121-124.
[7]臧宝凤,黄勇强,徐明力,等.双向旋流污水净化器处理溢流污水[J].环境工程学报,2013,7(4):1238-1240.ZANG Baofeng,HUANG Yongqiang,XU Mingli,et al.Treatment of overflow sewage by two-way swirling sewage purifier[J].Chinese Journal of Environmental Engineering,2013,7(4):1238-1240.
[8] DURHAM B.Membrane pretreatment of reverse osmosisLong term experience on difficult waters[J].Desalination,1999,122:157-170.
[9] YUAN S J,ZHENG Z,MU Y Y,et al.Use of gammairradiation pretreatment for enhancement of anaerobic digestibility of sewage sludge[J].Frontiers of Environmental Science and Engineering in China,2008,2(2):247-250.
[10]姜玉刚.慢滤水处理工艺[J].环境保护科学,2000,26(4):8-10.JIANG Yugang.Slow filtration treatment process[J].Environmental Science,2000,26(4):8-10.
[11] LEE M J,KIM T H,YOO G Y,et al.Reduction of sewage sludge by ball mill pretreatment and Mn catalytic ozonation[J].KSCE Journal of Civil Engineering,2010,14(5):693-697.
[12] MADAN T,IZARUL M,SHIGEKI U,et al.Potential of a combination of UASB and DHS reactor as a novel sewage treatment system for developing countries:long-term evaluation[J].Journal of Environmental Engineering,2006,132(2):166-172.
[13] VIGNESWARAN S,NGO H H,JEYASEELAN J.Application of non-conventional filtration technologies in pollution control[J].Environmental Monitoring and Assessment,1997,44(1-3):231-240.
[14]刘培坤,王鹏凯,杨兴华,等.锥盘旋流沉淀器数值模拟及试验研究[J].过滤与分离,2017,27(4):1-5,14.LIU Peikun,WANG Pengkai,YANG Xinghua,et al.Numerical simulation and experimental study of conical disc swirl precipitator[J].Filtration and Separation,2017,27(4):1-5,14.
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