Modeling of a Cocurrent Rotary Dryer

Parametric mathematical models of drying plants include balance equations and correlations that should be adjusted for each case depending on the material to be dried and the installation. In some cases, variable parameters are simplified as constants, providing an inaccurate model. This article presents a model of a cocurrent dryer, showing the process by which it is arrived at, and raises suggestions for some improvements in the determination of the drying rate to obtain a more accurate analytical expression. Preliminary tests are presented that can be performed on the solid material and the model of a pilot plant is validated.

[1]  Carlos Bordons,et al.  Modelling and H ∞ control of a rotary dryer , 2001 .

[2]  Yang Song.  Solids transportation, heat and mass transfer in rotary dryers , 2003 .

[3]  M. A. Garcia,et al.  MATHEMATICAL MODELING OF CONTINUOUS DRYERS USING THE HEAT AND MASS TRANSFER PROPERTIES AND PRODUCT-AIR EQUILIBRIUM RELATION , 2000 .

[4]  R. Arjona,et al.  The drying of alpeorujo, a waste product of the olive oil mill industry , 1999 .

[5]  Madoc Sheehan,et al.  A model for solids transport in flighted rotary dryers based on physical considerations , 2005 .

[6]  B. Liptak.  Optimizing dryer performance through better control. Part 2 , 1998 .

[7]  Madoc Sheehan,et al.  A physical description of solids transport in flighted rotary dryers , 2006 .

[8]  José Teixeira Freire,et al.  Modeling and Drying of Carton Packaging Waste in a Rotary Dryer , 2009 .

[9]  Sergio M. Savaresi,et al.  On modelling and control of a rotary sugar dryer , 2000 .

[10]  Fran Sérgio Lobato,et al.  Modeling of Fertilizer Drying in Roto-Aerated and Conventional Rotary Dryers , 2009 .

[11]  B. Liptak.  Optimizing dryer performance : Through better control , 1998 .

[12]  Don W. Green,et al.  Perry's Chemical Engineers' Handbook , 2007 .

[13]  Shusheng Pang,et al.  Mathematical Modeling of Rotary Drying of Woody Biomass , 2007 .

[14]  Valder Steffen,et al.  Estimation of drying parameters in rotary dryers using differential evolution , 2008 .

[15]  Jules Thibault,et al.  SOLIDS TRANSPORTATION MODEL OF AN INDUSTRIAL ROTARY DRYER , 2000 .

[16]  Jules Thibault,et al.  Modeling the Mean Residence Time in a Rotary Dryer for Various Types of Solids , 2010 .

[17]  Peter L. Douglas,et al.  SIMULATION OF A ROTARY DRYER FOR SUGAR CRYSTALLINE , 1993 .

[18]  Jules Thibault,et al.  Modelling and Dynamic Simulation of an Industrial Rotary Dryer , 2008 .

[19]  Peter L. Douglas,et al.  MODELLING AND CONTROL OF AN ALFALFA ROTARY DRYER , 2002 .