二次通用旋转组合设计优化亚麻籽挤压膨化工艺的研究

Optimization of Extruding Technique of Flaxseed Using Quadratic Regressive Currency Rotary Design

摘要:

采用SLG67-18.5双螺杆挤压机进行亚麻籽挤压膨化加工,以提高亚麻籽食用品质。研究了模孔直径、粉碎粒度、膨化温度、螺杆转速、喂料转速、含水率6个工艺参数对挤压膨化亚麻籽中HCN(氰化氢)去除率和膨化度的影响规律。通过二次通用旋转组合设计法,得到温度、含水率、螺杆转速、喂料速度对亚麻籽中HCN去除率、体外消化率、模头压力的数学模型,并进行优化,优化结果表明,温度156℃,含水率16.6%,螺杆转速219 r/min,喂料速度76.1 kg/h,亚麻籽挤压膨化效果最好。研究结果为亚麻籽的开发利用及现有挤压膨化机的操作和调整提供了理论依据。

Abstract:

With the aim of increase the quality of flaxseed,SLG67-18.5 twin-screw extruder was used to investigate and optimize the effect of diameter of mould,crushed granularity, temperature,moisture content,rotation speed of screw and feeding speed on removal rate of HCN in flaxseed and extrusion intensity.Mathematic expressions of removal rate of HCN,in vitro protein digestibility and mould pressure was set up by quadratic regressive currency rotary design.And the optimum conditions were listed as follows temperature,moisture content, rotation speed of screw and feeding speed 156℃,16.6%,219 r/min and 76.1kg/h respectively. The results presented here provided knowledge to the development and use of flaxseed,and to the operation and adjustment of the existing extruders.