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本研究旨在确定水稻风筛精选中筛片组合关键参数,提高加工的水稻种子的净度和发芽率,进而提高种子的使用价值和商品价值。以云南省籼稻、粳稻2个类型的18个主栽水稻品种的种子为材料,在测定其种子的粒径比基础上,用进口的LA-LS小型风筛精选机设备,开展风筛精选加工中不同筛片组合参数试验研究。结果表明:粳稻种子平均粒径比为1.40,籼稻种子平均粒径比为1.33;种子粒径比、下/上筛片孔径比(以下简称筛片孔径比)与净度及获选率之间呈线性关系;满足粳稻进行精选加工的上层筛片尺寸为2.60mm,下层筛片尺寸范围为1.70～1.90mm,最佳筛片孔径比为0.73。适于籼稻进行精选加工的上层筛片尺寸范围为2.25～2.60mm,下层筛片尺寸范围为1.50～1.90mm,最佳筛片孔径比为0.63。本研究获得的筛片组合关键参数在加工能力为4t/h的CIMBRIA DELTA SUPER 104型种子加工精选设备上进行验证,获得了加工种子质量和生产效率同步提高的效果,研究结果为水稻种子风筛精选加工和标准化处理提供了重要的技术支持。
The purpose of this study was to determine the key parameters of sieve assembly in the selection of rice wind screen and to improve the clarity and germination rate of the processed rice seeds so as to improve the use value and commodity value of the seeds. The seeds of 18 main cultivated rice varieties of indica rice and japonica rice in Yunnan Province were used as materials to determine the seed size ratio of their seeds, Experimental Study on Parameters of Different Screens in Processing. The results showed that the average seed diameter ratio of japonica rice was 1.40, and the average seed diameter ratio of indica rice was 1.33. The seed diameter ratio, the ratio of the lower / upper sieve aperture ratio (hereinafter referred to as sieve aperture ratio), the clarity and the selection rate Linear relationship; Japonica rice to meet the selection of the upper sieve size 2.60mm, the lower sieve size range of 1.70 ~ 1.90mm, the best sieve aperture ratio of 0.73. Suitable for indica rice processing of the upper sieve size range of 2.25 ~ 2.60mm, the lower sieve size range of 1.50 ~ 1.90mm, the best sieve aperture ratio of 0.63. The key parameters of the sieve assembly obtained in this study were validated on the CIMBRIA DELTA SUPER 104 seed processing equipment with a processing capacity of 4t / h, and the simultaneous improvement of the processing seed quality and production efficiency was obtained. The results showed that the rice seed wind Sieve selection processing and standardization provide important technical support.