Electroplating wastewater heavy metal removal system capable of realizing self-reflux sludge nucleation

The utility model discloses a self-reflux sludge nucleation electroplating wastewater heavy metal removal system which comprises a comprehensive raw water tank, a reaction unit, a first sedimentation tank and a self-reflux sedimentation tank which are sequentially connected through pipelines, and the first sedimentation tank is connected with the reaction unit through a pipeline; the spinning reflux sedimentation tank is connected with the comprehensive raw water tank and the reaction unit through pipelines; the reaction unit is used for reducing and decomplexing heavy metal ions in the wastewater to be treated to obtain flocculate and treated wastewater; the first sedimentation tank is used for performing mud-water separation on the flocculate and the treated wastewater to obtain primarily separated sludge and primarily separated wastewater; and the spinning reflux sedimentation tank is used for carrying out mud-water separation on the primarily separated wastewater to obtain secondarily separated sludge and