Analysis of flow characteristics of multistage liquid distributor
The treatment efficiency of the new wastewater treatment process is greatly affected by flow field perturbation in reaction pools,primarily caused by the outflow uniformity and the turbulence intensity at the outlet pores in liquid distributors.At present,research on the uniform water distribution by distributors is sparse,and the synergistic mechanism between the orifice resistance characteristics and the along-stream resistance characteristics in submerged flow has not yet been revealed.In this paper,a multi-stage liquid distributor structure with a gradient change in aperture diameter was proposed and applied in a demonstration project.A finite element analysis method for the submerged flow liquid distribution device,based on the species transport model,was established.Numerical simulation results were compared with the test results.It showed that the maximum average deviation of the chloride ion concentration in the two test planes was 1.97％,and the finite element simulation yielded a Christiansen's uniformity coefficient of 89.1％for the multi-stage liquid distributor.During the influent process,both the test and finite element simulation showed consistent trends in the change of the new influent quality fraction and the results were aligning well with each other.This proved that the new wastewater reactor structure was feasible enough to meet the requirements for engineering applications.
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NSTL
万方数据
维普
