Skip to main content

Vacuum Contact Drying of Free Flowing Mechanically Agitated Particulate Material

  • Conference paper
Drying ’85

Abstract

In vacuum contact drying of particulate material heat is supplied from a hot surface to adjacent layers of mechanically agitated material. The drying rate curves can be predicted from physical properties alone provided that the actual contact time of the material at the hot surface is known. For mechanically agitated particulate material the actual contact time has been correlated to the time scale of the agitator by the “penetration model”. Only one empirical parameter, the so called mixing number Nmix is necessary in order to predict drying rates for bench scale as well as for industrial dryers.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 84.99
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 109.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Schliinder, E.U., Chem.-Ing.-Techn. 43, 651 /654 (1971).

    Google Scholar 

  2. Mollekopf, N., and Martin, H., vt-verfahrenstechnik, 16, 701 /706 (1982).

    Google Scholar 

  3. Schlünder, E.U., Chemie-Ing.-Techn. 53, 925 /941 (1981).

    Google Scholar 

  4. Mollekopf, N., Wärmeübertragung an mechanisch durchmischtes Schüttgut mit Wärmesenken in Kontaktapparaten, Dissertation, Institut für Thermische Verfahrenstechnik, Universität Karlsruhe, Karlsruhe, (1983).

    Google Scholar 

  5. Schlünder, E.U., vt-verfahrenstechnik 18 (1984).

    Google Scholar 

  6. Carlslaw, H.S., Jaeger, J.C., Conduction of Heat in Solids, 2nd. ed., pp. 283, Oxford University Press (1959).

    Google Scholar 

  7. Günes, S., Schlünder, E.U. and Gnielinski, V., vt-verfahrenstechnik 14, 31 /39 (1980).

    Google Scholar 

  8. Fritz, W., Untersuchungen zur Wärmeübertragung bei der Kontakttrocknung von körnigen und formlosen Produkten in Vakuumschaufeltrocknern, GVC-FachausschuBsitzung ‘Trocknungstechnik’, Graz (1982).

    Google Scholar 

  9. Vosteen, B., Wärmetransport in Kontaktkühlern und Kontakttrocknern, GVC-FachausschuBsitzung ‘Trocknungstechnik’, Graz (1982).

    Google Scholar 

  10. Zehner, P., Experimentelle und theoretische Bestimmung der effektiven Wärmeleitfähigkeit durchströmter Kugelschüttungen bei mäßigen und hohen Temperaturen, VDI-Forschungsheft, No. 588, Verein Deutscher Ingenieure, Düsseldorf (1973).

    Google Scholar 

  11. Bauer, R., Effektive radiale Wärmeleitfähigkeit gasdurchströmter Schüttungen aus Partikeln unterschiedlicher Form und Größenverteilung, VDI-Forschungsheft No. 582 (1977) Verein Deutscher Ingenieure, Düsseldorf, see also Int. Chem. Eng. 18, 181 /203 (1978).

    Google Scholar 

  12. Schlünder, E.U., Proc. 7th Int. Heat Transfer Conf., München, vol. 1, RK 10, 195 /212 (1982).

    Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 1985 Springer-Verlag Berlin Heidelberg

About this paper

Cite this paper

Schlünder, E.U. (1985). Vacuum Contact Drying of Free Flowing Mechanically Agitated Particulate Material. In: Toei, R., Mujumdar, A.S. (eds) Drying ’85. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-21830-3_8

Download citation

  • DOI: https://doi.org/10.1007/978-3-662-21830-3_8

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-662-21832-7

  • Online ISBN: 978-3-662-21830-3

  • eBook Packages: Springer Book Archive

Publish with us

Policies and ethics