Research on ash movement law of membrane bin drum slag cooler

Abstract

For a membrane bin drum slag cooler, the ash movement model is established using the discrete element method. The EDEM software is used to simulate the movement state of the particles. The change of the active layer depth of the particles is analyzed, and the irregular movement of the particles is measured by the radial diffusion coefficient and the mixing degree. The results show that the thickness of the active layer increases linearly with the rotational speed, and the particle size has little effect on it. The diffusion coefficient of the particles in the active layer is large, and in the core area, it is the smallest. It increases from the core to the passive area and decreases near the wall. The particle size has little effect on the diffusion coefficient, but the filling rate dramatically influences it. The increase in rotational speed is beneficial to the diffusion of particles. With the rise of time, the mixing degree of particles increases continuously. The increase in rotational speed and particle size and the decrease in particle filling rate benefit particle mixing.