Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
권호 표지

Evaluation of Flow Characteristics within In-Line Mixer for Water Treatment using CFD Technique

CFD모사 기법을 이용한 관내 혼화장치내 흐름 특성 평가

  • Received : 2008.03.04
  • Accepted : 2008.06.05
  • Published : 2008.06.15
Download PDF
⟨ Previous Next ⟩

Abstract

The modified in-line mixer which was suggested in this study for small water treatment facilities was evaluated on the performance of coagulation. For the objectives of this research, computational fluid dynamics(CFD) simulation was applied for analysis of flow characteristics within the modified in-line mixer. For verifying the results of CFD simulation, wet tests for the pilot plant were conducted. The wet test was to measure the actual coagulant dispersion distribution on the overall cross-section at a distance of 5.5D from the chemical injection point. From the results of CFD simulation and wet test, it was shown that the coagulant dispersion within the modified in-line mixer was occurred more uniformly than within the existing PDM(Pump diffusion Mixer). The results have confirmed the modified in-line mixer had several advantages compared with the existing PDM in terms of dispersion efficiency.

Keywords

References

  1. 박영오, 박노석, 김성수, 김기돈, 임경호 (2008) CFD모사 기법 을 이용한 Pump Diffusion Mixer내의 응집제 확산분포에 대 한 평가, 상하수도학회지, 22(1), pp.49-63.
  2. Hudson, H. E. and Wolfner, J. P., (1967) Design of Mixing and Sedimentation Basins. Journal of AWWA, 59(10), pp. 1257-1268 https://doi.org/10.1002/j.1551-8833.1967.tb03453.x
  3. Vrale, L. and Jorden R. M. (1971) Rapid Mixing in Water Treatment. Journal of AWWA, 63(1), pp. 52-58 https://doi.org/10.1002/j.1551-8833.1971.tb04027.x
  4. Kawamura. S. (1991) Integrated Design of Water Treatment Facilities, JOHN WILEY & SONS, INC. New York
  5. Hyun-Chul Kim and Seockheon Lee. (2006) Pump diffusion flash mixing for improving coagulation process in drinking water treatment, Separation & Purification Technology, 52, pp. 117-125 https://doi.org/10.1016/j.seppur.2006.03.022
  6. Clark M.M., Srivastava J.S., Lang R.R., Trussell L.J., McCollum D., Bailey, J.D. Christie, G. Stolarik (1994) Selection and Design of Mixing Processes for Coagulation, AWWA Research Foundation, Denver, USA.
  7. 박영오, 김기돈, 박노석, 임재림, 임경호 (2008) Pump Diffusion Mixer에서 압력수량에 따른 응집제 확산분포 특성, 상하수도학회지, 22(1), pp.65-71.
  8. 건설교통부 (2005), 상수도시설기준
  9. No-Suk Park and Heekyung Park, 2002, Analysis of local velocity gradients in rapid mixer using particle image velocimetry technique, Water Science and Technology: Water Supply, Vol. 2, No. 5-6, pp. 47-55,