| The physical properties of Cyperus esculentus were studied, and a small single screw press was designed for low temperature pressing of Cyperus esculentus. The theoretical total compression ratio, gap between cage bar, gap between cakes were used as influence factors, the residual oil rate of cake and the impurity content of crude oil were used as indicators, and the orthogonal experiment was used to optimize the structural parameters of the press. The results showed that the moisture content and bulk density of the natural dried Cyperus esculentus were 6.71% and 0.7 kg/L. The theoretical total compression ratio had the most significant effect on the indicators, and the optimal structural parameters were obtained as follows: theoretical total compression ratio 10, and the gap between cage bar was 1.2, 1.0, 0.8,0.8, 0.6 mm, and the gap between cakes 1.5 mm. Under these conditions, the residual oil rate of cake was 5.1%, and the impurity content of crude oil was 7.11%. The study could provide a reference for the production of Cyperus esculentus oil by screw pressing. |
