Configuration optimization and analysis of newly developed vortex quick separator for FCC disengager

Key words:  voriex quick separaior  numerical simulation  flow field  separation efficiency  pressure drop

Abstract:

The influence of the inner cylinder configuration on the flow field in the newly developed vortex quick separation system for FCC disengager was studied. Three-dimensional flow field in the newly developed vortex quick separator was simulated based on the Reynolds stress model( RSM)provided by CFX software. The trajectory of the paiiiclea was computed by introducing: the discrete random walk tracking model, through which the grade efficiency and the general efficiency of the separator can be simulated. Numerical calculation results show that the pressure drop of the new voitex quick separator decreases with the diameter of the inner cylinder (Oe) increasing and changes a little with the length of the inner cylinder (fit) increasing. The grade efQciency of the particle with diameter being less than 8 p.m decreases with increasing, and the grade efficiency of the particle with diameter being less than 3 (im decreases with He decreasing. The general separation efficiency increases fiwdy and. then decreases with D^. increasing7 and increases with increasing. The performance of type II is better than that of type ? Thereby the oplimal coniiguralion of tKe inner cyJinder is obtained when disposing of power is composed of different diameter particles, which can be used in engineering design.