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筛选。根据稻谷与杂质的不同宽度和厚度,选用筛孔合适的筛选机械筛除与谷粒大小不同的杂质。精选。根据稻谷与杂质在长度上的不同进行分离。工具是刻有半球形袋孔的曲面或圆面,当其在物料中转动时,短粒嵌入袋孔内,被旋转的曲面带到一定高度抛出。长粒不能嵌入袋孔,自另一端流出。这类机械包括碟片精选机和滚筒精选机,多用于清除稗子和对长短粒进行分级。风选。利用稻谷与杂质的比重和悬浮速度等气体动力学特性的不同,使质轻的杂质(如谷
filter. According to the different width and thickness of rice and impurities, choose the appropriate screening sieve mechanical screening and grain size of different impurities. Featured. According to the length of rice and impurities in the separation. Tool is engraved hemispherical pocket surface or round surface, as it rotates in the material, the short grain embedded in the pocket, the surface is rotated to a certain height thrown. Long grain can not be embedded in the pocket, outflow from the other end. These machines include a disc sorter and a roller sorter, which are used to remove barnyardgrass and grade long and short grains. Wind election. The use of the proportion of rice and impurities and suspended gas velocity and other aerodynamic differences, the light impurities (such as Valley