▎ 摘　　要

NOVELTY - Industrial grade device comprises membrane filtration unit, conduit, air pressure pipeline, material inlet and outlet. The membrane filtration unit comprises filter boxes arranged in parallel. Each filter box is equipped with ultrasonic generator. The top of each filter box is connected to material inlet. A feeding box is arranged on one side of each filter box. The filter box is separated from receiving box by filtration membrane. The bottom of each receiving box is connected with water outlet. The top of each filter membrane is connected with air pressure pipeline. USE - Industrial grade device used for purifying graphene oxide solution (claimed). ADVANTAGE - The device can run in long term. DETAILED DESCRIPTION - Industrial grade device comprises membrane filtration unit, conduit, air pressure pipeline, material inlet and outlet. The membrane filtration unit comprises filter boxes arranged in parallel. Each filter box is equipped with ultrasonic generator. The top of each filter box is connected to material inlet. A feeding box is arranged on one side of each filter box. The filter box is separated from receiving box by filtration membrane. The bottom of each receiving box is connected with water outlet. The top of each filter membrane is connected with air pressure pipeline. The air pressure pipe is equipped with air regulating valve.