Numerical Simulation And Utility Research On An Atomizing Process Of Tobacco Feeding Nozzle

During the manufacturing of cigarette, quality tobacco shred with homogeneous received flavors is the important guarantee for high-quality cigarette, and studies on the procedures of adding flavors for producing tobacco shred has always been the focus of the researches conducted in this industry. However, the homogeneous application of flavors to tobacco and tobacco shred is a complicated and multidisciplinary procedure and limited by processing conditions. The measure of cut-and-try in combination with experience has usually been taken to conduct researches on it, which could not completely reveal the quintessential law of the process of material feeding and thus has limited the development of the refinement of cigarette.This article introduces the process of manufacture tobacco shred development, and through investigation in adding flavors atomizing system. Then this article takes the atomizing nozzle in a factory as the target for research and begins from the process of pulverization. First, the mechanism for the formation of pulverization is further studied and the pulverization fineness and the spray cone angle were introduced into the material feeding procedures as the indexes for evaluation. Then the KH broken model and dynamic drag force model have been adopted according to the production process to combine the CFD technology to conduct theoretical calculation and numerical stimulation on the process of pulverization. Finally, related production experiment has been designed and samples have been examined so as to obtain the charging uniformity and the utilization rate of material liquid, thus verifying the correctness of the theoretical models. Furthermore, this paper investigates the adding flavors atomizing system of many famous tobacco company, and design the test-bed for verify the research of atomizing mechanism. Then its 3D model is building by Solidworks, and lay a foundation of nest experiment research.This article takes compressed air as the atomizing agent, and when the flow of the material liquid remains unchanged, it has been found that with the increasing of the incoming air pressure as well as the increasing speed at the outlet of the nozzle the fog drops formed by the pulverization would become finer. According to the experiment and research, the material charging uniformity at the incoming air pressure of 3.5bar was 2.39% higher than that at 2.5bar but the utilization rate of material liquid was 4.27% lower. This indicates that the increasing of incoming air pressure will lead to high quality of pulverization effect and good absorption result of the materials. However, the fog drops were too fine and liable to drift away, so it is not helpful for the improvement of the utilization rate of material liquid.