Applying CFD in the Analysis of Heavy Oil/Water Separation Process via Hydrocyclone

K Angelim, A De Lima, J Souza, S Neto, V Oliveira, G Moreira

Abstract


In recent years most of the oil reserves discovered has been related to heavy oil reservoirs whose reserves are abundant but still show operational difficulties. This fact provoked great interest of the petroleum companies in developing new technologies for increasing the heavy oil production. Produced water generation, effluent recovered from the production wells together with oil and natural gas, is among the greatest potential factors for environmental degradation. Thus, a new scenario of the oil industry appears requiring improvement in treatment units for produced water. Among the technological improvements in the facilities, the use of hydrocyclones has been applied in the treatment of the oily water. In this sense, this study aims to investigate numerically the separation process of heavy oil from a water stream via hydrocyclone, using the computational fluid dynamics technique. In the mathematical modeling was considered a two-phase, three-dimensional, stationary, isothermal and turbulent flow. Results of streamlines, pressure and volume fraction fields of the involved phases (oil and water) into the hydrocyclone, and mechanical efficiency and pumping power of the fluids are shown and analyzed. In conclusion, it seems that with increasing fluid input velocity in the device there is an increase in pressure drop, indicating a greater pumping energy consumption of the mixture, and greatly influences the separation process efficiency.


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References


Motta, A.R.P.; Borges, C.P.; Kiperstok, A.; Esquerre, K.P.; Araujo, P.M.; Branco, L.P.N.; Produced water treatment for oil removal by membrane separation processes: Review. Engenharia Sanitária Ambiental, v. 18, p. 15-26, 2013. (In Portuguese)

Rego, F.C.A., Cylindrical cyclone study of a centrifugal flotation unit with the aid of computational fluid dynamics. Master dissertation. Post-Graduate Program in Chemical Engineering, Federal University of Santa Catarina. Florianópolis-SC, Brazil, 2008. (In Portuguese)

Simões, A.M.B.M., Water-oil separation spilled in the sea using hydrocyclone: a numerical study of the swirling intensity caused by the feed duct. Master dissertation. Post-Graduate Program in Chemical Engineering, Federal University of Campina Grande, Campina Grande-PB, Brazil, 2005. (In Portuguese)

Matvienko, O.V; Evtyushkin, E.V., Theoretical investigation of the process of cleaning oil-polluted soil in hydrocyclone apparatuses. Journal of Engineering Physics and Thermophysics, v. 80, n. 3, p 72-80, 2007. Crossref

Souza, J. S, Farias Neto, S. R., Lima, A. G. B., Separation of liquids via hydrocyclones: Thermofluiddynamics. Germany: NEA New Academic Editions, 2015, v.1. p.156, 2015. (In Portuguese)

Almeida, C. S.; Control strategies study for offshore compact systems of primary oil processing. Master dissertation. Chemistry and Technology of Chemical and Biochemical Processes School, Federal University of Rio de Janeiro. Rio de Janeiro-RJ, Brazil, 2014. (In Portuguese)

Farias, F.P.M.; Souza, J. S.; Lima, W.C.P.B.; Macêdo, A.C.; Farias Neto, S.R.; Lima, A.G.B.; Influence of geometric parameters of the hydrocyclone and sand concentration on the water/sand/heavy-oil separation process: Modeling and Simulation. The International Journal of Multiphysics, v. 5, p. 187-202, 2011. Crossref

Souza, J. S.; Paiva, M. K. N.; Farias, F. P. M.; Farias Neto, S. R.; Lima, A. G. B., Hydrocyclone applications in produced water: a steady-state numerical analysis. Brazilian Journal of Petroleum and Gas, v. 6, n. 3, p. 133-143, 2012. Crossref

Luna, F. D. T.; Santos, B. R. G., Araújo, M. V.; Santos, E. B; Farias Neto, S. R.; Lima, A.G. B., Numerical study of water-oil separation in cyclonic separators. International Journal of Modeling and Simulation for the Petroleum Industry, v. 9, n. 1, p. 13-19, 2015

Souza, J. S., Numerical study of the thermofluid dynamics of the separation of heavy oils from an oily water stream via hydrocyclone. Master dissertation. Post-Graduate Program in Chemical Engineering Federal University of Campina Grande, Campina Grande-PB, Brazil, 2009. (In Portuguese)

Luna, F. D. T., Numerical study of the separation process of a biphasic system in a cyclonic separator. Master dissertation. Post-Graduate Program in Chemical Engineering, Federal University of Campina Grande, Campina Grande-PB, Brazil, 2014. (In Portuguese)

Barbosa, E.S.; Geometric and hydrodynamic aspects of a hydrocyclone in the multiphase systems separation process: Application in the oil industry. Doctoral thesis. Post-Graduate Program in Process Engineering, Federal University of Campina Grande. Campina Grande-PB, Brazil, 2011. (In Portuguese)

Souza, J. S.; Farias, F. P. M.; Swarnakar, R.; Farias Neto, S. R.; Lima, A.G. B., Non-Isothermal separation process of two-phase mixture water/ultra-viscous heavy oil by hydrocyclone. Advances in Chemical Engineering and Science, v. 1, n. 4, p. 271-279, 2011. Crossref

F.P.M. Farias, C.J.O. Buriti, W.C.P.B. Lima, S.R. Farias Neto, A.G.B. Lima, The Effect of droplet diameter on the separation of heavy-oil from water using a hydrocyclone. Defect and Diffusion Forum v. 303-304, p 131-137, 2010. Crossref




DOI: http://dx.doi.org/10.21152/1750-9548.11.2.151

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