Aerator for treating printing and dyeing sewage

The invention provides an aerator for treating printing and dyeing sewage and belongs to the technical field of machinery. The aerator is used for solving the technical problems in the prior art that when an aerator structure is placed in an aeration tank, the phenomenon of upwards floating can occur, the working stability is low, and the like. The aerator for treating printing and dyeing sewage comprises an air inlet pipe, air distributing pipes and inner pipes, wherein the air inlet pipe is cylindrical, the upper end of the air inlet pipe is an air inlet end which is used for being connected with an air distribution pipeline, the lower end of the air inlet pipe is closed, the side part, close to the lower end, of the air inlet pipe is provided with a plurality of air outlet ends, the air distributing pipes are arranged vertical to the air inlet pipe, the inner ends of the air distributing pipes are connected with the air outlet ends, the inner pipes are located in the air distributing pipes, the inner ends of the inner pipes are sealed, the outer ends of the inner pipes are fixedly connected to the outer ends of the air distributing pipes and are provided with water through holes communicated with internal cavities, and the air distributing pipes have aeration structures capable of resisting water and permeating air. The aerator for treating printing and dyeing sewage has the advantages of convenience in aeration and good working stability.