Parameter optimization and mechanism research of double-layer variable screen surface vibrating screen

Abstract

In the vibrating screening operation, each area of the screen surface has a different screening environment, and the material layer thickness, target particle proportion and other parameters of each area are different, which limits the screening efficiency of a vibrating screen with a traditional screen surface. In this paper, a double-deck variable screen surface screening method is proposed to optimize the design of the double-deck screen surface. The relationship between the elements of the screening process, screening parameters and screening efficiency of a double-deck variable screen surface vibrating screen is investigated through DEM numerical simulation. Using the particle swarm algorithm to support the vector regression model for global optimization, the parameters of the double-deck variable screen surface vibrating screen further optimized to obtain screening parameters: screen area A screen hole edge length of 4.7 mm, screen area D screen hole edge length of 2.7 mm, screen area D screen surface inclination angle of 6.3°, amplitude 2.6 mm, vibration frequency of 22.2 Hz, vibration direction angle of 35°, and through the experimental prototype for physical experimental verification.

Keywords:

• Double-layer variable screen surface vibration screening
• discrete element method
• screening efficiency
• particle swarm optimization
• support vector regression

Additional information

Funding

This work was supported by the Natural Science Foundation of Fujian Province (No.: 2020J01870) and Fuzhou Science and Technology Bureau (No.: 2020-GX-16).