烟草物料风力输送速度的分析和研究

ON TRANSPORTED VELOCITY OF THE RAW MATERIAL OF TOBACCO

烟草行业中的风力系统主要包括风力浮选和风力输送两大类，风力浮选和风力输送在烟草行业广泛应用，它是烟草物料分级和输送的重要手段。风力浮选和风力输送的一个重要参数是物料的悬浮速度。由于烟草物料（叶片、烟丝、烟梗）的密度小、形状复杂，若等效为球体以当量直径来处理，势必会引起较大的误差。文章结合烟草行业和烟草的特点，较为详细地探讨烟草物料在垂直管道中的悬浮速度问题。

The method that raw material is classified or transported by wind power system is widely used in cigarette making industry. The raw material of cigarette making such as tobacco(including leaf tobacco and pipe tobacco and so on) is mainly classified by air flow and transported by wind power.The main problem of this method is the floated velocity of tobacco.For being of low density and complicated shape,tobacco is not treated as equivalent spheroid in studing on the floated velocity by air,otherwise there is much error.Combined with the characteristics of tobacco ,in this paper,the floated velocity of tobacco in vertical tube is carefully analyzed.And the transported velocity of tobacco is given based on the floated velocity.