With the increasing requirements for energy conservation and environmental protection, multi-layer vibrating screens have become hot issues. Compared with single-layer vibrating screens, multi-layer vibrating screens has much better performance in terms of processing effect, treatment capacity, and environmental protection. The research on the physical parameters of the multi-layer vibrating screen is of great significance to the actual production. However, analysis and simulation studies of multi-layer vibrating screens are limited. In this paper, the screening process of wet particles on a multi-layer vibrating screen was simulated by using the discrete element method. The characteristics and application scope of the two vibration modes were analyzed. The particle penetration rate, the number of collisions, and the distribution of the particles under 23 combinations of structures and vibration parameters were investigated. The influence of different parameters on screening performance was analyzed. Several optimal combinations of frequency, amplitude and screen inclination angle under different working conditions were obtained. The screening efficiency of the balanced elliptic motion is higher than that of the linear motion. The best combination of the three parameters is 4 mm amplitude, 20 Hz frequency, and 3° inclination angle. The efficiency is higher when the particles follow a distribution of arithmetic on the screen. This study provides a reference for the efficient operation and optimal design of large multi-layer screening equipment.

随着人们对节能环保要求的不断提高，多层振动筛成为热点问题。与单层振动筛相比，多层振动筛在处理效果、处理能力、环保等方面都有更好的表现。多层振动筛物理参数的研究对实际生产具有重要意义。然而，对多层振动筛的分析和模拟研究是有限的。本文利用离散元法模拟了多层振动筛上湿颗粒的筛分过程。分析了两种振动模式的特点和适用范围。粒子穿透率、碰撞次数、并对23种结构和振动参数组合下的颗粒分布进行了研究。分析了不同参数对筛分性能的影响。得到了不同工况下频率、振幅和筛网倾角的几种最佳组合。平衡椭圆运动的筛分效率高于直线运动的筛分效率。这三个参数的最佳组合是 4 mm 振幅、20 Hz 频率和 3° 倾角。当粒子在屏幕上遵循算术分布时，效率更高。该研究为大型多层筛分设备的高效运行和优化设计提供了参考。分析了不同参数对筛分性能的影响。得到了不同工况下频率、振幅和筛网倾角的几种最佳组合。平衡椭圆运动的筛分效率高于直线运动的筛分效率。这三个参数的最佳组合是 4 mm 振幅、20 Hz 频率和 3° 倾角。当粒子在屏幕上遵循算术分布时，效率更高。该研究为大型多层筛分设备的高效运行和优化设计提供了参考。分析了不同参数对筛分性能的影响。得到了不同工况下频率、振幅和筛网倾角的几种最佳组合。平衡椭圆运动的筛分效率高于直线运动的筛分效率。这三个参数的最佳组合是 4 mm 振幅、20 Hz 频率和 3° 倾角。当粒子在屏幕上遵循算术分布时，效率更高。该研究为大型多层筛分设备的高效运行和优化设计提供了参考。平衡椭圆运动的筛分效率高于直线运动的筛分效率。这三个参数的最佳组合是 4 mm 振幅、20 Hz 频率和 3° 倾角。当粒子在屏幕上遵循算术分布时，效率更高。该研究为大型多层筛分设备的高效运行和优化设计提供了参考。平衡椭圆运动的筛分效率高于直线运动的筛分效率。这三个参数的最佳组合是 4 mm 振幅、20 Hz 频率和 3° 倾角。当粒子在屏幕上遵循算术分布时，效率更高。该研究为大型多层筛分设备的高效运行和优化设计提供了参考。