Design and simulation of flow field for magnetic flocculation reactor

被引：4
|
作者：
Xie Q. [1 ]
Liu X. [1 ]
Wu C. [1 ,2 ]
Wang Y. [1 ]
Zhu G. [1 ]
机构：
[1] School of Environment, Jiangsu University, Zhenjiang
[2] Yangzhou Vocational College of Environment and Resource, Yangzhou
来源：
Jiangsu Daxue Xuebao (Ziran Kexue Ban)/Journal of Jiangsu University (Natural Science Edition) | 2010年 / 31卷 / 04期
关键词：
Magnetic coils; Magnetic flocculation; Reactor; Simulation; Wastewater treatment;
D O I：
10.3969/j.issn.1671-7775.2010.04.021
中图分类号：
学科分类号：
摘要：
The property and effect of flocculent can be improved under the magnetic field. A magnetic flocculation reactor was designed based on the magnetic effect. Five pairs of circular magnetic coils constitute a large measuring range magnetic field generator by utilizing Helmholtz coil, and the reactor can be adjusted continuously from 1 nT to 100 mT. Then the magnetic field distribution in Helmholtz coil was simulated by MATLAB. The improved k-ε two equation model was used to simulate the wastewater velocity distribution in the reactor. Results indicated that the magnetic field in Helmholtz coil could be seen as uniform magnetic field. There were rotational flow zones in the reactor, which had advantage of the formation of flocs. The motion of the solid particles could be modified in the magnetic field, and the probability of collision could be enhanced. Finally the effect of magnetic flocculation reactor was tested. The removal rate of SS, CODCr, TP were up to 96.7%, 45.3% and 96.0% respectively in 20 min. Magnetic flocculation has obvious advantages compared to traditional flocculation craft.
引用
收藏
页码：473 / 477
页数：4
相关论文
共 13 条
  • [1] Singer P.C., Bilyk K., Enhanced coagulation using a magnetic ion exchange resin, Water Research, 36, pp. 4009-4022, (2002)
  • [2] Skvarla J., Zelenak F., Magnetic-hydrophobic coagulation of paramagnetic minerals: A correlation of theory with experiments, Int J Miner Process, 68, pp. 17-36, (2003)
  • [3] (2007)
  • [4] Wang L., He Y., Fan H., Et al., Treatment of oily wastewater by magnetic flocculation separation process, Environmental Engineering, 25, 3, pp. 12-14, (2007)
  • [5] Du H., Zhang F., Lu F., Et al., Experimental study on magnetic flocculation-magnetic disc separation technique for Chaohu eutrophication of water treatment, Technology of Water Treatment, 35, 5, pp. 86-90, (2009)
  • [6] de Melo C.F., Araujo R.L., Ardjomand L.M., Et al., Calibration of low frequency magnetic field meters using a Helmholtz coil, Measurement, 42, pp. 1330-1334, (2009)
  • [7] Zhang J., Xu Y., Liu M., Et al., A design of large measuring range magnetic field generator, Modern Scientific Instruments, 3, pp. 57-60, (2007)
  • [8] (2006)
  • [9] Gamwo I.K., Halow J.S., Gidaspow D., CFD models for methanol synthesis three-phase reactors: Reactor optimization, Chemical Engineering Journal, 93, pp. 103-112, (2003)
  • [10] Brouckaert C.J., Buckley C.A., The use of computational fluid dynamics for improving the design and operation of water and wastewater treatment plants, Water Science and Technology, 40, 4-5, pp. 81-89, (1999)
12