关键词: 催化裂化, 残留固体, 分离, 水力旋流分离器

Abstract: The removal of residual catalyst particles in FCC slurry by a mini hydro-cyclone (with a diameter of 10 mm) was studied using water as liquid phase medium and the experiments were carried out at room temperature. The test results showed that under a solid content in feed of less than 2% and an average particle diameter of 16 μm, the revised total separation efficiency reached 96.6%~97.5%; d50’ was 3.1μm, d50 was less than 2μm, the solid content in top flow was 0.018% with an average particle diameter of 5.6 μm; if a second stage hydro-cyclone was applied, the solid content in top flow could be further reduced to 67 μg/g. Since the actual residual catalyst particles in FCC slurry were somewhat bigger than that of the testing powder, it should be technically feasible to remove them by mini hydro-cyclone with a diameter of 10 mm.

Key words: fluidized catalytic cracking, slurry, particle, speparation, mini-hydrocyclone