Impact Disaggregation Simulation of Wet Coal Agglomerate and Sieve Plate of Flip-Flow Screen Using Discrete Element Method
Aiming at the problem of difficulty in sieving agglomeration of wet coal,the mechanism and influencing factors of col-liding depolymerization between wet coal agglomeration and flip-flow sieve plate were studied.Firstly,the particle size composi-tion of wet coal agglomerates was determined by the cluster screening experiment,and the wet coal agglomerates model based on experimental data was constructed by combining the liquid bridging force contact model.EDEM-RecurDyn joint simulation was established to analyze the colliding depolymerization mechanism of wet coal agglomerates and remittent sieve plates and the influ-ence of different eccentricity on colliding depolymerization of agglomerates.The results show that the depolymerization of the ag-gregate first occurs in the contact area between the aggregate and flip-flow sieve plate,and the collision is transmitted to the middle and upper part of the aggregate through the large particles in the center,causing the rapid depolymerization of the aggre-gation.Then the particles move upward and around as a whole,and the depolymerization process tends to be stable.Compared with the static sieve plate,the depolymerization of the agglomerates can be enhanced by increasing the eccentricity of the sieve plate in the appropriate range.The conclusion can provide some reference for the design and optimization of tension screen.
The Flip-Flow ScreenWet Coal AgglomerationCollision DepolymerizationDiscrete Element Method
NETL
NSTL
万方数据
维普
