Development and Application of Flocculation Reactor with Lozenge Fin Plates

A flocculation reactor with lozenge fin plates,which can simultaneously control the intensification of flow micro-vortex and the equal distribution of flow macro-turbulence,was constructed according to the backward-facing step flow theory.The geometric parameters of the flocculation reactor were optimized by numerical investigation and a pilot experiment.The optimized reactor was applied in a steelworks wastewater reuse project.The operation results show that when the reactor capacity is 750 m3/h,the effluent turbidity is about 1 NTU,and the removal rate of COD is 48.5%,which decreases the load of the follow-up treatment.It is proved that the reactor has higher flocculation efficiency and good effluent quality,and it can be used in steelworks wastewater reuse projects.