▎ 摘　　要

NOVELTY - The utility model claims a device for purifying sewage, comprising a tank body divided into an upper tank body and a lower tank body; the tank top centre extends into a stirring rod from the outside; the stirring rod is provided with a agitating blade in the upper tank body, the upper tank body is filled with graphene composite material as adsorbent for processing sewage; setting upper and lower two layers of tank bodies; the upper layer stirring and the lower layer filtering can be carried out at the same time; accelerating the sewage treatment speed; the filter screen of the lower layer tank body is provided with a conical protective cover; the graphene on the filter screen can effectively protect the graphene 3 D printing composite material from directly impacting the sewage directly filled by the upper tank body. the drain pipe is connected with a water pump; it also can accelerate the filtering speed of the lower tank body. the upper and lower tank bodies are provided with a timing switch; after the upper layer sewage stirring for a certain time, automatically opening the sewage after stirring reaction into the lower tank body; after a certain time of sewage enters the lower tank body, closing; at the same time of the lower tank body sewage filtering, the upper layer tank body introduces new sewage stirring reaction.