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12 - Drying of solutions, slurries, and pastes

Published online by Cambridge University Press:  04 February 2011

By
José Teixeira Freire ,
Maria do Carmo Ferreira  and
Fábio Bentes Freire
Edited by
Norman Epstein  and
John R. Grace
Norman Epstein
Affiliation:
University of British Columbia, Vancouver
John R. Grace
Affiliation:
University of British Columbia, Vancouver
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Summary

Introduction

In a system consisting of a liquid and solids dispersed within it, such as slurries and pasty materials, the structure and characteristic properties are defined by the solids concentration, shape, and size distribution. A variety of solid–liquid mixtures, such as suspensions, dispersions, sludges, and pulps, is included in these categories. Solutions with a solute that crystallizes out on evaporation are also included. The drying of solutions in beds of inert particles of spoutable size was developed in the late 1960s at the Lenigrad Institute of Technology for applications in which the dried solids are ultimately required in the form of a fine powder. Spouting with inert particles was applied successfully by the Leningrad group to dry organic dyes and dye intermediates, lacquers, salt and sugar solutions, and various chemical reagents. Since then, a large number of materials have been successfully dried, demonstrating the applicability and versatility of this method. A partial list of dried materials is given in Table 12.1.

Drying process

Description

The drying of pastes (or slurries or solutions, all referred to henceforth in this chapter generically as pastes) is performed in the presence of inert particles, which are both a support for the paste and a source of heat for drying. The paste may be atomized or dropped into the bed by a nozzle or dropping device. An example of an experimental facility for research in paste drying is shown in Figure 12.1.

Type
Chapter
Information
Spouted and Spout-Fluid Beds
Fundamentals and Applications
 , pp. 206 - 221
Publisher: Cambridge University Press
Print publication year: 2010

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References

Strumillo, C., Markowiski, A., and Kaminski, W.. Modern developments in drying of pastelike materials. In Advances in Drying, vol. 2, ed. Mujumdar, A. S. (Washington, DC: McGraw-Hill, 1983), pp. 193–231.Google Scholar
Mathur, K. B. and Epstein, N.. Spouted Beds (New York: Academic Press, 1974).Google Scholar
Souza, C. R. F. and Oliveira, W. P.. Spouted bed drying of Bauhinia forticata link extract: the effects of feed atomizer position and operating conditions on equipment performance and product properties. Braz. J. Chem. Eng., 22 (2005), 239–247.CrossRefGoogle Scholar
Schneider, T. and Bridgwater, J.. The stability of wet spouted beds. Drying Technol., 11 (1993), 277–301.CrossRefGoogle Scholar
Szentmarjay, T. and Pallai, E.. Drying of suspensions in a modified spouted bed dryer with an inert packing. Drying Technol., 7 (1989), 523–536.CrossRefGoogle Scholar
Reyes, A., Díaz, G., and Blasco, R.. Slurry drying in gas-particle contactors: fluid-dynamics and capacity analysis. Drying Technol., 16 (1998), 217–233.Google Scholar
Markowski, A. S.. Quality interaction in a jet spouted bed dryer for bio-products. Drying Technol., 11 (1993), 369–387.CrossRefGoogle Scholar
Pham, Q. T.. Behavior of a conical spouted-bed dryer for animal blood. Can. J. Chem. Eng., 61 (1983), 426–434.CrossRefGoogle Scholar
Ré, M. I. and Freire, J. T.. Drying of pastelike materials in spouted beds. In Drying '89, ed. Mujumdar, A. S. and Roques, M. A. (New York: Hemisphere, 1989), pp. 426–432.Google Scholar
Barrett, H. and Fane, A.. Drying of liquid materials in a spouted bed. In Drying '89, ed. Mujumdar, A. S. and Roques, M. A. (New York: Hemisphere, 1990), pp. 415–420.Google Scholar
Brereton, C. and Lim, C. J.. Spouted bed drying of sludge from metals processing industry wastewater treatment plants. Drying Technol., 11 (1993), 389–399.CrossRefGoogle Scholar
Guo, Q., Hikida, S., Takahashi, Y., Nakagawa, N., and Kato, K.. Drying of microparticle slurry and salt-water solution by a powder-particle spouted bed. J. Chem. Eng. of Japan, 29 (1996), 152–158.CrossRefGoogle Scholar
Xu, J., Osada, S., and Kato, K.. Limiting efficiency for continuous drying of micro-particle slurries in a powder-particle spouted bed. J. Chem. Eng. of Japan, 31 (1998), 35–40.CrossRefGoogle Scholar
Cunha, R. L., Maialle, K. G., and Menegalli, F. C.. Evaluation of drying process in spouted bed and spout fluidized bed of xanthan gum: focus on product quality. Powder Technol., 107 (2000), 234–242.CrossRefGoogle Scholar
Medeiros, M. F. D., Rocha, S. C. S., Alsina, O. L. S., Jerônimo, C. E. M., da Mata, U. K. L. Medeiros, and A. L. M. L.. Drying of pulps of tropical fruits in spouted bed: effect of composition on drying performance. Drying Technol., 20 (2002), 855–881.CrossRefGoogle Scholar
Neto, P. I. Spitzner, Cunha, F. O., and Freire, J. T.. Effect of the presence of paste in a conical spouted bed dryer with continuous feeding. Drying Technol., 20 (2002), 789–811.CrossRefGoogle Scholar
Passos, M. L., Trindade, A. L. G., d'Angelo, J. V. H., and Cardoso, M.. Drying of black liquor in spouted bed of inert particles. Drying Technol., 22 (2004), 1041–1067.CrossRefGoogle Scholar
Cordeiro, D. S. and Oliveira, W. P.. Technical aspects of the production of dried extract of Maytenus ilicifolia leaves by jet spouted bed drying. Int. J. Pharmac., 299 (2005), 115–126.CrossRefGoogle ScholarPubMed
Bacelos, M. S., Neto, P. I. Spitzner, Silveira, A. M., and Freire, J. T.. Analysis of fluid dynamics behavior of conical spouted beds. Drying Technol., 23 (2005), 427–453.CrossRefGoogle Scholar
Benali, M. and Amazou, M.. Drying of vegetable starch solutions on inert particles: quality and energy aspects. J. Food Eng., 74 (2006), 484–489.CrossRefGoogle Scholar
Pallai-Varsányi, E., Tóth, J., and Gyenis, J.. Dying of suspensions and solutions on inert particle surface in mechanically spouted bed dryer. China Particuology, 5 (2007), 337–344.CrossRefGoogle Scholar
Wachiraphansakul, S. and Devahastin, S.. Drying kinetics and quality of okara dried in a jet spouted bed. LW, 40 (2007), 207–219.CrossRefGoogle Scholar
Almeida, A. R. F.. Analysis of paste drying in a spouted bed. PhD thesis, Federal Univ. of São Carlos, Brazil (in Portuguese) (2009).
Allen, K. W.. “At forty comes understanding” – a review of some basics of adhesion over the past four decades. Int. J. Adhesion & Adhesive, 23 (2003), 87–93.CrossRefGoogle Scholar
Gay, C.. Stickiness – some fundamentals of adhesion. Integr. Comp. Biol., 42 (2002), 1123–1126.CrossRefGoogle ScholarPubMed
Collares, F. P., Finzer, J. R. D., and Kieckbush, T. G.. Glass transition control of the detachment of food pastes dried over glass plates. J. Food Eng., 61 (2004), 261–267.CrossRefGoogle Scholar
Rodrigues, C. C.. Analysis of the drying of suspensions in spouted bed with inert particles. M.Sc. dissertation, Federal Univ. of São Carlos, Brazil (in Portuguese) (1993).
Patel, K., Bridgwater, J., Baker, C. G. J., and Schneider, T.. Spouting behavior of wet solids. In Drying '86, ed. Mujumdar, A. S. and Roques, M. A. (New York: Hemisphere, 1986), pp. 183–189.Google Scholar
Passos, M. L. and Mujumdar, A. S.. Effect of cohesive forces on fluidized and spouted beds on wet particles. Powder Technol., 110 (2000), 222–238.CrossRefGoogle Scholar
Passos, M. L., Mujumdar, A. S., and Raghavan, G. S. V.. Spouting and spout-fluidization of dry-wet particles in a two-dimensional bed. In Drying of Solids, ed. A. S. Mujumdar (New Delhi: Sarita, Prakaschan, 1990), pp. 211–220.Google Scholar
Santana, J. D. A., Charbel, A. L. T., Passos, M. L., and Massarani, G.. Effect of interparticle forces on the spouted bed flow behavior. In Proceedings of IADC '97 (Itu, SP, Brazil: Univ. of Campinas Press, 1997), vol. A, pp. 135–142.Google Scholar
Neto, P. I. Spitzner. Study of paste drying and fluid dynamics of spouted beds in the presence of pastes and liquids. Ph.D. thesis, Federal Univ. of São Carlos, Brazil (in Portuguese) (2001).
Medeiros, M. F. D.. Influence of the material properties on the drying of pulp fruit in spouted beds. Ph.D. thesis, Univ. of Campinas, Brazil (in Portuguese) (2001).
Taruna, I. and Jindal, V. K.. Drying of soy pulp (okara) in a bed of inert particles. Drying Technol., 20 (2002), 1035–1051.CrossRefGoogle Scholar
Kmiec, A.. Simultaneous heat and mass transfer in spouted beds. Can. J. Chem. Eng., 53 (1975), 18–24.CrossRefGoogle Scholar
Oliveira, I. M. and Passos, M. L.. Simulation of drying suspension in a conical spouted bed. Drying Technol., 15 (1997), 593–604.CrossRefGoogle Scholar
Oliveira, W. P.. Study of paste drying in conical spouted bed. Ph.D. thesis, Federal Univ. of São Carlos, Brazil (in Portuguese) (1996).
Seville, J. P. K., Willet, C. D., and Knight, P. C.. Interparticle forces in fluidization: a review. Powder Technol., 113 (2000), 261–268.CrossRefGoogle Scholar
Schubert, H., Herrmann, W., and Rumpf, H.. Deformation behaviour of agglomerates under tensile stress. Powder Technol., 11 (1975), 121–131.CrossRefGoogle Scholar
Schubert, H.. Principles of agglomeration. Int. Chem. Engng., 21 (1981), 363–377.Google Scholar
Sherrington, P. J. and Oliver, R.. Granulation (London: Heyden and Sons, 1981).Google Scholar
Ergun, S.. Fluid flow through packed columns. Chem. Eng. Progr., 48:2 (1952), 89–94.Google Scholar
Pagliai, P., Simons, S. J. R., and Kudra, D.. Towards a fundamental understanding of defluidisation at high temperatures: a micro-mechanistic approach. Powder Technol., 148 (2004), 106–112.CrossRefGoogle Scholar

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