SCALING UP THE DRYING PROCESS OF SUGAR CANE BAGASSE

  • P. A. Quintana-Hernandez
  • L. E. Poot-Aguilar
  • G. M. Martínez-González
  • A. J. Castro-Montoya
Keywords: modeling, dimensionless numbers, industrial dryers, pneumatic drying

Abstract

In this work, it is developed a strategy for scaling the drying process based on the analysis of models, developed and validated with experimental information, for the drying of sugar cane bagasse at pilot plant level. The pilot plant level model includes partial differential equations for the balances of matter, energy and moment and empirical correlations for evaluating properties and transport variables. The scaling was done based on the drying process characteristic dimensionless groups. Design variables (dryer length and diameter) were expressed as a function of those groups and balance equations were simplified to ordinary differential equations because the variation of moisture and temperature inside the particles was less than 0.5 %. The industrial scale simulation model was validated with data reported in the literature and it was used for generating information about relationships among process variables. With the results of the simulations, two correlations were developed for calculating length and diameter of industrial dryers as function of operation variables and initial moisture content of particles. The maximum percentage error generated by the correlations was of 13.6% and 7.2 as average

References

Capes, C. E. y Nakamura, K. (1973). Vertical Pneumatic Conveying: An Experimental Study with Particles in the Intermediate and Turbulent Flow Regimes. The Canadian Journal of Chemical Engineering 51, 31-38.

Churchill, S. W. y Bernstein, M. (1977). A Correlating Equation for Forced Convection from Gases and Liquids to a Circular Cylinder in Cross flow. Journal of Heat Transfer 99, 300-306.

Cornejo, S. L. (1998). Modelado del Proceso de Secado por Transporte Neumático de un Sistema de Múltiples Tamaños. Tesis Doctoral, Instituto Tecnológico de Celaya, México.

Darros Barbosa, R. y Menegalli, F. C. (1987). Estudo Experimental de Secagem Pneumática de Bagaço de Cana, Anais do IV Congresso Brasileiro de Energía II, 494-502.

Kemp, I. C. y Bahu, R. E. (1992). Modeling Agglomeration Effects in Pneumatic Conveying Dryers. Drying’92, 444-453.

Kemp, I. C., Bahu, R. E. y Oakley, D. E. (1991a). Modeling Vertical Pneumatic Conveying Dryers. Drying’91, 217-227.

Kemp, I. C., Oakley, D. E. y Bahu, R. E. (1991b). Computational Fluids Dynamics Modeling of Vertical Pneumatic Conveying Dryers. Powder Technology 65, 477- 484.

Klinzing, G. E., Rohatgi, N. D., Myler, C. A., Dhodapkar, S., y Zaltash, A. (1989). Pneumatic Transport of Solids in an Inclined Geometry. The Canadian Journal of Chemical Engineering 67, 237-244.

Kmiec, A. (1986). Study on Hydrodynamics of Flows in a Pneumatic Flash Dryer. Drying’86, 73-76.

Lobo, R. (1997). Principios de Transferencia de Masa, UAM, México D.F.

Marcus, R. D., Leung L. S., Klinzing G. E. y Rizk, A. (1990). Pneumatic Conveying of Solids. Chapman and Hall, Nueva York, Estados Unidos.

Perry, R. H., y Chilton, C. (1987). Manual del Ingeniero Químico. McGraw Hill. México.
Published
2020-09-18
How to Cite
Quintana-Hernandez, P. A., Poot-Aguilar, L. E., Martínez-González, G. M., & Castro-Montoya, A. J. (2020). SCALING UP THE DRYING PROCESS OF SUGAR CANE BAGASSE. Revista Mexicana De Ingeniería Química, 5, 57-66. Retrieved from http://www.rmiq.org/ojs311/index.php/rmiq/article/view/2037