The effects of screw configuration on the screw fill degree and special mechanical energy in twin-screw extruder for high-moisture texturised defatted soybean meal

文献类型： 外文期刊

第一作者： Zhang, Bo

作者： Zhang, Bo;Zhang, Yingquan;Wei, Yimin;Dreisoerner, Jens

作者机构：

关键词： Extrusion;Twin-screw;Elements;Configuration;Special mechanical energy

期刊名称：JOURNAL OF FOOD ENGINEERING （ 影响因子：5.354； 五年影响因子：5.144 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： To control the mechanical energy output by adjusting the screw configuration during soybean protein extrusion texturisation, the relationship between the screw configuration and the special mechanical energy was investigated. Different types of screw elements, element lengths and positions were designed and configured, while the other parameters were kept unchanged. The screw fill degree and specific mechanical energy output were detected. The results demonstrate that when the helix angle of conveying elements turns from forward (45 degrees) to reverse (-37.5 degrees), the disc width of the kneading elements decreases from 7.5 mm to 5 mm, and when the disc stagger angle turns from forward (45 degrees) and forward (90 degrees) to reverse (-45 degrees), the screw fill degree and specific mechanical energy increase. When the length of the reverse kneading element increases, the screw fill degree and specific mechanical energy increase. When the distance between the reversing knead element and the die increases or the element space between the reversing knead element increases, the specific mechanical energy appears to decrease. Thus, the elements with reverse helix or stagger angles, narrow kneading disc, long length and flow-restricting ability increase the screw fill degree and induce high special mechanical energy. The special mechanical energy increases when the reverse kneading element is located at the screw position where the material viscosity is relatively high during extrusion. (C) 2015 Elsevier Ltd. All rights reserved.

分类号： TS2

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