Grain velocity distribution in a mixed flow dryer

被引：56

作者：

Keppler, Istvan ^{[1
]}

Kocsis, Laszlo ^{[2
]}

Oldal, Istvan ^{[1
]}

Farkas, Istvan ^{[3
]}

Csatar, Attila ^{[2
]}

机构：

[1] Szent Istvan Univ, Dept Mech & Engn Design, H-2103 Godollo, Hungary

[2] Hungarian Inst Agr Engn, H-2100 Godollo, Hungary

[3] Szent Istvan Univ, Dept Phys & Proc Control, H-2103 Godollo, Hungary

来源：

ADVANCED POWDER TECHNOLOGY | 2012年 / 23卷 / 06期

关键词：

Drying; Granular material; Arching; Discrete element model; 2-DIMENSIONAL SIMULATION-MODEL; NUMERICAL-SIMULATION; MASS-TRANSFER; BED; VALIDATION; PATTERNS; DRIERS; HEAT;

D O I：

10.1016/j.apt.2011.11.003

中图分类号：

TQ [化学工业];

学科分类号：

081705 [工业催化];

摘要：

For corn drying one of the most popular possibilities in Europe is to use a mixed flow dryer. Large differences in the vertical grain particle velocity in this type of dryers are causing differences in the residence time. Hence, uneven drying occurs causing under-drying or over-drying of grain portions. To investigate the influences of the dryer walls and the air ducts on the particle velocity distribution experiments have been carried out in industrial and laboratory sized dryers and the measurements were compared with discrete element models. The particle flow velocity distribution between the air ducts is modelled analytically based on arching hypothesis. Using discrete element models the effects of different possible constructional modifications causing more even vertical grain particle velocity distribution were analyzed. (C) 2011 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

引用

页码：824 / 832

页数：9

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