▎ 摘　　要

NOVELTY - Graphene nano-technology-based medical water purification device comprises a filtering unit having a water source (1), a first-stage graphene filter screen (2), a second-stage graphene filter screen (3), a third-stage graphene filter screen (6), and a fourth-stage graphene filter screen (7), and a purification sterilization unit and a filtration unit. The mesh number of the first, second, third, and fourth-stage graphene filter screen is sequentially increased. The purification sterilization unit and the filtration unit are connected by a first stage water valve. The medical water to be purified passes through the four-stage graphene filter screen in turn and enters the purification and sterilization unit. The purification and sterilization unit sequentially includes a first-stage purified water column, a second-stage purified water column, a first-stage sterilization pool, a second-stage sterilization pool, and a third-stage water purification column in the water flow direction. USE - Graphene nano-technology-based medical water purification device. ADVANTAGE - The graphene nano-technology-based medical water purification device significantly purifies organic and inorganic pollutants and various pathogenic bacteria remaining in medical water, is applicable to water treatment scenarios of various medical institutions and various pharmaceutical companies, and has relatively simple device structure and low cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for purifying medical water based on graphene nanotechnology, which involves: (A) passing medical water to be purified sequentially through a graphene filter screen with a four-order mesh number to obtain a preliminary purified water body; (B) subjecting preliminary purified water body to primary purification, secondary purification, primary sterilization, secondary sterilization and further three purifications to obtain a final purified water body; (C) using large specific surface graphene nano material by primary purification for adsorption; (D) using graphene photocatalyst by secondary purification for photocatalytic degradation; (E) performing primary sterilization by ultrasonic assisted graphene sterilizing agent; (F) performing secondary sterilization by using a superparamagnetic nanoparticle-graphene oxide composite nano material; and (G) performing three purifications by using a graphene-reinforced diatomaceous material for final purification. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of graphene nano-technology-based medical water purification device. Water source (1) First-stage graphene filter screen (2) Second-stage graphene filter screen (3) Third-stage graphene filter screen (6) Fourth-stage graphene filter screen (7)