新型构件下多级环流反应器的流体力学行为

Specially designed internals were used in a novel multi-stage internal-loop airlift slurry reactor to effectively decrease the liquid backmixing and homogeneously suspend the solid particles. A proper gas layer height can ensure the normal slurry flow for both each stage and between two stages. Effects of the inter-stage internal of the perforated plate and the novel gas-slurry separation internal on the solid distribution are studied experimentally, and effects of solid loading, superficial gas and liquid velocity and opening ratio on the gas layer height were also investigated. The results show that the novel gas-slurry separation internal is more beneficial to achieve uniform solid distribution between two stages than the internal of the perforated plate, which is very effective for three-phase system requiring high conversion and slower reaction velocity; the gas layer height increases with the increasing superficial gas velocity and decreases with the increasing superficial liquid velocity.