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Flow in standpipes and gravity conveyors

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Pneumatic Conveying of Solids

Part of the book series: Powder Technology Series ((POTS,volume 8))

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Abstract

This chapter is concerned with the flow of solids under gravity. Two types of flow will be considered. In one, solids flow downwards in a vertical or inclined tube generally known as a ‘standpipe’. Standpipe flow is often encountered in the outlet of hoppers, in cyclone diplegs and particularly in transferring solids out of a fluidized bed. The other type of gravity flow considered here is analogous to open channel flow of a liquid. This is known as flow in a gravity conveyor or an air-slide. Solids flow down a channel tilted a few degrees to the horizontal (often between 1° and 8°). The solids are fluidized by an upflow of gas close to the minimum fluidization velocity and flow down the channel like a liquid. In this chapter, the two types of gravity flow will be considered separately.

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Author information

Authors and Affiliations

  1. Chemical Engineering, University of Pittsburgh, USA

    G. E. Klinzing (Professor)

  2. Morgan Education Technologies (Pty) Ltd, South Africa

    R. D. Marcus

  3. Key Centre for Bulk Solids and Particulate Technologies, University of Newcastle, Australia

    R. D. Marcus

  4. Technical Research and Development Department, BASF-Aktiengesellschaft, Ludwigshafen, Germany

    F. Rizk (Professor Dr Ing. and Senior Engineer)

  5. Commonwealth Scientific and Industrial Research Organization, Australia

    L. S. Leung

Authors
  1. G. E. Klinzing
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  2. R. D. Marcus
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  3. F. Rizk
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  4. L. S. Leung
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© 1997 G.E. Klinzing, R.D. Marcus and F. Rizk

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Klinzing, G.E., Marcus, R.D., Rizk, F., Leung, L.S. (1997). Flow in standpipes and gravity conveyors. In: Pneumatic Conveying of Solids. Powder Technology Series, vol 8. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-8981-9_8

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  • DOI: https://doi.org/10.1007/978-94-015-8981-9_8

  • Publisher Name: Springer, Dordrecht

  • Print ISBN: 978-94-015-8983-3

  • Online ISBN: 978-94-015-8981-9

  • eBook Packages: Springer Book Archive

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