Cross-flow filtration hydrocyclone for liquid/liquid separation

M. D. Gaustad, R. R. Rieck, W. Shan, A. Bénard, V. V. Tarabara, C. A. Petty

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Computational results show that a cylindrical cross-flow filter hydrocyclone with a length ratio, L/D equal to 4 performs best over a range of operating conditions. The increased residence time associated with a longer CFFH is lost due to the weakened angular momentum in the outer vortex from the flux to the inner core. For higher Reynolds numbers the tangential and axial velocities increase. While this trend improves the separation due to an increase in acceleration, the residence time decreases. For a split ratio equal to 50%, predicted oil droplet diameters must equal 300 μm. With respect to experimental testing of the porous filter, the oil concentration from the permeate (underflow) has been lowered to 0-15 mg/L with the 1.4 μm microfiltration membrane. However, the permeate flux decreases very rapidly within the filtration time. By introducing a centrifugal flow inside the membrane, as in hydrocyclones, the membrane is expected to have an improved performance with low oil fouling.

LanguageEnglish (US)
Title of host publicationAIChE Annual Meeting, Conference Proceedings
StatePublished - 2009
Event2009 AIChE Annual Meeting, 09AIChE - Nashville, TN, United States
Duration: Nov 8 2009Nov 13 2009

Other

Other2009 AIChE Annual Meeting, 09AIChE
CountryUnited States
CityNashville, TN
Period11/8/0911/13/09

Profile

Oils
Membranes
Liquids
Fluxes
Microfiltration
Angular momentum
Fouling
Vortex flow
Reynolds number
Testing

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Gaustad, M. D., Rieck, R. R., Shan, W., Bénard, A., Tarabara, V. V., & Petty, C. A. (2009). Cross-flow filtration hydrocyclone for liquid/liquid separation. In AIChE Annual Meeting, Conference Proceedings

Cross-flow filtration hydrocyclone for liquid/liquid separation. / Gaustad, M. D.; Rieck, R. R.; Shan, W.; Bénard, A.; Tarabara, V. V.; Petty, C. A.

AIChE Annual Meeting, Conference Proceedings. 2009.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Gaustad, MD, Rieck, RR, Shan, W, Bénard, A, Tarabara, VV & Petty, CA 2009, Cross-flow filtration hydrocyclone for liquid/liquid separation. in AIChE Annual Meeting, Conference Proceedings. 2009 AIChE Annual Meeting, 09AIChE, Nashville, TN, United States, 11/8/09.
Gaustad MD, Rieck RR, Shan W, Bénard A, Tarabara VV, Petty CA. Cross-flow filtration hydrocyclone for liquid/liquid separation. In AIChE Annual Meeting, Conference Proceedings. 2009.
Gaustad, M. D. ; Rieck, R. R. ; Shan, W. ; Bénard, A. ; Tarabara, V. V. ; Petty, C. A./ Cross-flow filtration hydrocyclone for liquid/liquid separation. AIChE Annual Meeting, Conference Proceedings. 2009.
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AU - Petty,C. A.

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AB - Computational results show that a cylindrical cross-flow filter hydrocyclone with a length ratio, L/D equal to 4 performs best over a range of operating conditions. The increased residence time associated with a longer CFFH is lost due to the weakened angular momentum in the outer vortex from the flux to the inner core. For higher Reynolds numbers the tangential and axial velocities increase. While this trend improves the separation due to an increase in acceleration, the residence time decreases. For a split ratio equal to 50%, predicted oil droplet diameters must equal 300 μm. With respect to experimental testing of the porous filter, the oil concentration from the permeate (underflow) has been lowered to 0-15 mg/L with the 1.4 μm microfiltration membrane. However, the permeate flux decreases very rapidly within the filtration time. By introducing a centrifugal flow inside the membrane, as in hydrocyclones, the membrane is expected to have an improved performance with low oil fouling.

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