The Effect of the Making Methods of Hollow Fiber Active Layer on Performance for Nanofiltration Helical Module

Nanofiltration Helical Module에서 Hollow Fiber Active Layer의 성형법에 따른 성능변화에 관한 연구

  • 이광현 (동의대학교 공과대학 화학공학과) ;
  • Published : 1997.07.01

Abstract

The effects of varing axial flow rate and solute concentration on the performance of both module sets made by different methods for active layer formation were compared and determined. All experiments were conducted simultaneously at the same transmembrane pressure and energy consumption per membrane area. In every comparative run between the presence of Dean vortices in a helical module and absence of such vortices in a linear module from the first module set, the solution fluxes and permeabilities were higher, and in some cases substantially higher for the vortex flow. With pure water, the permeabilities of both modules from the second module set were different and the flux in a linear module was 150% higher than in the helical module. This explained both module membranes were totally different.

Active layer의 형성법에 따른 첫번째 모듈 set와 두번째 모듈 set 사이의 성능변화가 축방향 속도와 용질 농도변화를 통하여 각 모듈 set별로 비교, 고찰되었다. 모든 실험들은 같은 transmembrane pressure와 막면적당 에너지 소모하에서 동시에 수행되었다. 첫번째 모듈 set에 대해서 Dean vortices가 존재하는 나선형 모듈과 Dean vortices가 없는 선형모듈로 수행된 모든 비교 실험에서 용질 flux와 투과계수는 vortex flow의 경우 훨씬 큰 값을 보였다. 두번째 모듈 set에 대해서 순수에 대한 두 모듈의 투과계수는 다른 값을 보이고 있으며 선형 모듈의 투과계수가 나선형 모듈에 비해 약 150% 높은 것으로 나타났다. 이는 두 모듈의 막이 완전히 달라졌음을 보여준다.

Keywords

References

  1. Journal of Membrane Science v.80 H. B. Winzeler;G. Belfort
  2. Ph. D. Thesis, Department of Food Engineering, Lund University Ultrafiltration in a rotary annular filter M. Lopez-Leiva
  3. Ph. D. Thsis, ETH Zurich J. Liebher
  4. Philosophical Manazine, 4 v.20 W. R. Dean
  5. Philosophical Manazine, 5 v.30 W. R. Dean
  6. Zeitschrift fur angewandte Mathematikund Mechamik v.14 M. Alder
  7. "The Effect of Secondary Fluid Motion on Laminar Flow Heat Transfer in Helically Colied Tubes", 68th National AlChE Meeting A. N. Dravid;K. A. Smith;E. W. Merrill;P. L. T. Brain
  8. Desalination v.9 S. Srinivasan;C. Tien
  9. Desalination v.13 R. J. nunge;L. R. Adams
  10. Zeitschrift fur angewandte Mathematik und Mechamik v.49 H. Ito
  11. Journal of Fluid Mechanics v.203 M. Germano
  12. Proceedings of the Royal Society A v.121 W. R. Dean
  13. Proceedings of the Royal Society A v.244 W. H. Reid
  14. PhD Thesis, Department dfChemical Engineering, RPI, Troy Instabilities of viscous flow in a curved channel:A new approach in membrane module design K. Y. Chung
  15. Tetrakis-Amido High Flux Membranes, United states Patent # 4,876,009 S. McCray
  16. The Performance of Spiral Tubular Nanofiltration Project Work, Department of Chemical Engineering, RPI, Troy M. schmidt
  17. Electrolyte Solutions R. A. Robinson;R. H. Stokes