基于离散元方法的餐厨垃圾螺旋挤压装置性能研究

目的：提高餐厨垃圾变螺距挤压脱水装置脱水效果。方法：基于离散元方法，分析颗粒的挤压状态，改变填充系数、螺旋转速、倾角，模拟装置内物料颗粒的挤压情况。结果：变螺距的螺旋挤压脱水装置在有一定倾角的情况下，填充系数增高，转速加快，物料颗粒间的挤压力会随之增大。结论：在填充率为60%、螺旋转速为60 r/min、倾角为15°时，螺旋挤压装置的挤压性能显著提高。

Study on performance of kitchen waste spiral extrusion device based on discrete element method

Objective:To study the physical and geometric factors that affect the extrusion effect between particles in the spiral extrusion dewatering device for kitchen waste, and to provide reference for selecting the parameters of the spiral extrusion and dewatering device.Methods:Based on the discrete element method, the state of the extruded particles was analyzed, and the extrusion situation of the material particles in the device was simulated by changing the filling coefficient, spiral speed and inclination angle.Results:When there was some inclination angle in the screw extrusion dehydration device with variable pitch, the filling coefficient increased and the rotation speed up, and the extrusion pressure between the material particles increased accordingly.Conclusion:When the filling rate was 60%, the screw speed was 60 r/min, and the angle was 15°, the extrusion performance of the screw extrusion device could be significantly improved.