油菜籽挤压膨化系统参数对榨笼出油规律的影响

Effects of the parameters of the extrusion-expansion on the regularity of rapeseed oil extruded in bar cage

通过二次正交旋转组合试验,研究了油菜籽含水率、套筒温度、主轴转速及模孔直径对榨笼出油率的影响规律。同时,对沿榨笼轴向的出油量分布规律进行了探讨。结果表明,含水率对出油率影响最大,其他因素影响比较平缓;含水率低(6%～8%)的油菜籽,采用小模孔(直径8～10mm)、中等套筒温度[(105±5)℃]、中等主轴转速(45r/min左右)的参数挤压,榨笼出油率可高于70%,有利于油菜籽膨化和降低粕残油率。榨笼出油分布规律明显,出油量最高峰发生在前段140mm附近,挤出油脂的80%分布在榨笼前半部。

The lawwas research＇ed that the ratio ofoil extruded in bar cage influenced by moisture content, barrel temperature ,rotational speed of main spindle, diameter of die nozzle, and the distribution regularity of oil extruded in bar cage along the bar cage axial direction was studied through the quadratic orthogonal -rotation combination. The results indicated that the ratio of oil extruded in bar cage was influenced remarkably by moisture content, the other factors effects were faint. More than 70% of the rapeseed oil could be extruded in bar cage, when the rapeseed with low moisture content 6% - 8%, extruded with parameters of small die nozzle （ diameter 8 - 10 mm）, barrel temperature （ 105 -± 5 ） ℃ and rotational speed 45 r/min, which was beneficial to expand rapeseed and reduce the residual oil of rapeseed meal. The distribution regularity of oil extruded in bar cage was obvious, the maximum quantity of extruded oil took place near the front of cage 140 mm, oil of 80% or more was extruded in the front half of the cage.