Chemical sewage pretreatment equipment

The invention discloses chemical sewage pretreatment equipment, and relates to the technical field of sewage treatment.The chemical sewage pretreatment equipment comprises a fixed shaft, a plurality of filtering units are rotationally connected to the fixed shaft, each filtering unit comprises an arc-shaped filtering cone and at least one supporting arm, and each arc-shaped filtering cone comprises an arc piece and end plates fixedly connected to the two ends of the arc piece; the arc piece comprises a water containing part and two filter screen parts distributed on the two sides of the water containing part, one end of the support arm is rotationally connected with the fixed shaft, the other end of the support arm is rotationally connected with the end plate through a rotating shaft, and in the stroke of revolution of each filter unit around the fixed shaft, the arc-shaped filter cone of each filter unit has a filter stroke for receiving and filtering sewage in a free falling state; the unloading stroke is u