Research on optimization of processing parameters for single screw extruder machine

doi:10.13733/j.jcam.issn.2095-5553.2025.06.034

Abstract

Abstract:

In the field of puffed food processing, the objective is to produce feed with a high degree of expansion and fluffiness, which is currently a key requirement in the market. Accordingly, in order to enhance feed production efficiency and puffiness, based on a combination of CFD software Fluent numerical simulation and Box—Behnken experimental design, this paper selected screw speed, expansion temperature and feeding speed as the primary influencing factors, and adopted response surface analysis method to optimize the pretreatment process conditions of the single‑screw extruder for processing soya bean meal materials, thereby establishing a mathematical model of the process. The findings indicated that the optimal expansion temperature was 109.96 ℃, the optimal feeding speed was 0.07 m/s, and the optimal screw speed was 117.66 r/min. Finally, by comparing the results of the expansion degree of different groups of materials, it was found that under the process conditions of expansion temperature of 110 ℃, feeding speed of 0.07 m/s, and screw speed of 120 r/min, the feed produced had the highest expansion degree of 3.85, which verified the feasibility of the above optimal scheme.

Key words: puffed food, CFD, Box—Behnken experiments, response surface analysis, expansion degree

摘要：

在膨化食品加工领域，高膨胀度、松软度的饲料是当今市场一直追求的目标。因此，为提高饲料的生产效率和膨胀度，基于CFD软件Fluent数值模拟和Box—Behnken试验设计，选取螺杆转速、膨化温度和入料速度为主要影响因素，采用响应面分析法优化单螺杆膨化机加工混合物料的预处理工艺条件，并建立工艺数学模型。结果表明，最佳参数组合：膨化温度为109.96 ℃，入料速度为0.07 m/s，螺杆转速为117.66 r/min。通过对比不同组物料膨胀度结果，发现在膨化温度为110 ℃，入料速度为0.07 m/s，螺杆转速为120 r/min的工艺条件下，生产出的饲料膨胀度最高，达到3.85，验证最优方案的可行性。

关键词: 膨化食品；计算流体力学, Box—Behnken试验；响应面分析；膨胀度

CLC Number:

S225

Li Jinhu, , Zhang Fuping, Li Hua, , Feng Xuebin, , Qi Xindan, . Research on optimization of processing parameters for single screw extruder machine[J]. Journal of Chinese Agricultural Mechanization, 2025, 46(6): 228-235.

李金虎, 张福平, 李骅, 冯学斌, 齐新丹, . 单螺杆膨化机加工工艺参数优化研究[J]. 中国农机化学报, 2025, 46(6): 228-235.

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