The invention relates to the technical field of
wastewater treatment, in particular to a multistage treatment device for industrial heavy
metal wastewater, which comprises an integrated
wastewater treatment tank, the integrated wastewater treatment tank is formed by combining a
sedimentation tank, a reaction tank and a residue filtering tank, a dosing tank is fixedly mounted at the upper end of the reaction tank, and a dosing mechanism is arranged on the inner side of the dosing tank. The chemical feeding mechanism is combined with the mixing mechanism, so that the dynamic mixing of mixed liquid in the reaction cavity is ensured while intermittent chemical feeding during industrial wastewater reaction is realized, and the heavy
metal precipitation reaction efficiency is improved; the
aeration assembly is combined with the spherical frame, so that uniform
aeration is realized, and meanwhile, the supporting strength of the whole structure of the spherical frame is ensured; by arranging the hoop reinforcing
assembly, the spherical frame is hooped, so that the overall structure is reinforced, the hoop reinforcing
assembly is combined with the uniform
aeration assembly, the bidirectional locking effect of the spherical frame and the uniform aeration assembly is achieved, the waste water mixing and stirring effect is achieved, and multiple purposes are achieved.