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| Numulation analysis of particle motion in heating layer and hot-air flow field in drying layer of soybean conditioning tower |
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| DOI： |
| KeyWord:conditioning heating layer drying layer particle motion hot-air flow field |
| FundProject:河南省重大科技专项（211100110100-3） |
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| Abstract: |
| In order to optimize the design of the elliptical tubes in the heating layer and the angular boxes in the drying layer of the soybean conditioning tower, the discrete element method (DEM) was adopted to analyze the influence of structure and distribution of the elliptical tubes in the heating layer on the movement of soybean particles, and the calculation fluid dynamics (CFD) method was used to analyze the hot-air flow characteristics in drying layer. The results showed that when the long and short axis ratio of the elliptical tube was 2.28∶ 1, the soybean particles could be evenly distributed in the heating layer without plugging, and the particle collision frequency was less. It was conducive to improve the heating efficiency of soybean, and reduce the damage of the particles and the wear degree of the elliptical tube. When the axis angle of the elliptical tube in the adjacent heating layer was 90°, the time required for the particles to pass through the heating layer was the shortest, and the change of the axis angle had no significant effect on the number of collisions in the heating layer.When the axial direction of the angular box was parallel to the axial direction of the elliptical tube,there was a large turbulence of hot-air in the drying layer, the distribution of hot-air in the drying layer was more decentralized, and the hot-air formed a softer countercurrent on both sides of the angular box, which was more conducive to the drying of soybean particles and the smooth fall. By analyzing the influence of the parameters of the heating layer and drying layer of the conditioning tower on the motion characteristics of soybean particles and the distribution of the hot-air flow field, it can provide a reference for the optimization of the structural design of the conditioning tower. |
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