discrete element modelling of screw conveyor-mixers
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2015
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Abstract
Screw conveyors are used extensively in food, plastics, mineral processing,
agriculture and processing industries for elevating and/or transporting bulk
materials over short to medium distances. Despite their apparent simplicity
in design, the transportation action is very complex for design and
constructors have tended to rely heavily on empirical performance data. Screw
conveyor performance is affected by its operating conditions (such as: the
rotational speed of the screw, the inclination of the screw conveyor, and its
volumetric fill level). In this paper, horizontal, several single-pitch screw
conveyors with some geometry variations in screw blade was investigated for
mixing action during transport, using Discrete Element Method (DEM). The
influence of geometry modifications on the performance of screw conveyor was
examined, different screw designs were compared, and the effects of
geometrical variations on mixing performances during transport were explored.
During the transport, the particle tumbles down from the top of the helix to
the next free surface and that segment of the path was used for auxiliary
mixing action. The particle path is dramatically increased with the addition
of three complementary helices oriented in the same direction as screw blades
(1458.2 mm compared to 397.6 mm in case of single flight screw conveyor)
Transport route enlarges to 1764.4 mm, when installing helices oriented in
the opposite direction from screw blades. By addition of straight line blade
to single flight screw conveyor, the longest particle path is being reached:
2061.6 mm [Projekat Ministarstva nauke Republike Srbije, br. TR-31055]
| Reference Key |
aca2015hemijskadiscrete
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|---|---|
| Authors | ;Jovanović Aca;Pezo Lato;Stanojlović Sanja;Kosanić Nenad;Lević Ljubinko |
| Journal | lecture notes in information systems and organisation |
| Year | 2015 |
| DOI |
10.2298/HEMIND130412026J
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| URL | |
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