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Methods for design of hoppers. Silos, bins and bunkers for reliable gravity flow, for pharmaceutical, food, mineral and other applications

Methods for design of hoppers. Silos, bins and bunkers for reliable gravity flow, for pharmaceutical, food, mineral and other applications

Bradley, Michael, Berry, Robert and Farnish, Richard (2011) Methods for design of hoppers. Silos, bins and bunkers for reliable gravity flow, for pharmaceutical, food, mineral and other applications. In: BulkSolids India 2011, 6-8 April 2011, Mumbai, India. (Unpublished)

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Abstract

It is now four and a half decades since Andrew Jenike introduced the first integrated method for characterising powders for flow, and using this information to design a hopper that would discharge without hang-up. Sadly, many users and designers of hoppers still do not benefit from this, so a lot of process vessels in industry still suffer from rat-holing, arching and bridging. Objections of cost, time and questionable accuracy were levelled at the original hopper design method, in spite of the breakthrough it represented. However, over the last 40 years these problems have been overcome with the introduction of faster, easier to use and more sensitive powder flowability measurement techniques, and a lot of experience of what measurements matter with which materials and in what operational scenarios. This paper will pull together various lessons learned from many years of hopper and silo design projects, and show a practical approach to deciding (i) what flow pattern is required (mass flow or core flow), (ii) what measurements need to be made of the powder properties, and (iii) what design models should be used, based on the material being handled and the operational requirements of any given case.

Item Type: Conference or Conference Paper (Paper)
Uncontrolled Keywords: methods for design of hoppers, silos bins and bunkers
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Faculty / Department / Research Group: Faculty of Engineering & Science > Wolfson Centre for Bulk Solids Handling Technology
Related URLs:
Last Modified: 07 Nov 2016 16:36
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
URI: http://gala.gre.ac.uk/id/eprint/6974

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