What to do if the membrane of medical purified water equipment is polluted?

Medical purified water equipment is based on the principle of reverse osmosis In the process of reverse osmosis, the volume of water entering is decreasing, the concentration of suspended particles and soluble substances is increasing, and suspended particles will deposit on the membrane, blocking the water inlet passage and increasing the friction resistance (pressure drop) The insoluble salt will precipitate from the concentrated water, form scaling on the membrane surface, and reduce the RO membrane flux This phenomenon of deposition on the membrane surface is called membrane fouling, which results in degradation of system performance What should I do if the membrane of medical purified water equipment is polluted? Here is a brief introduction to the cleaning conditions of membrane of purified water equipment: 1 Pump clean, free chlorine free ro product water from the cleaning tank (or corresponding water source) into the pressure vessel and discharge it for a few minutes 2 Use clean product water to prepare cleaning solution in the cleaning tank 3 Circulate the cleaning fluid in the pressure vessel for 1 hour or preset time The flow rate is 35-40 GPM (133-151 L / min) for 8-inch or 8.5-inch pressure vessel, 15-20 GPM (57-76 L / min) for 6-inch pressure vessel and 9-10 GPM (34-38 L / min) for 4-inch pressure vessel 4 After cleaning, drain the tank and wash it, then fill the tank with clean product water for further washing 5 Pump clean, free chlorine free product water from the cleaning tank (or corresponding water source) into the pressure vessel and drain for several minutes 6 After washing the reverse osmosis system, the reverse osmosis system will be operated under the opening of the product water drain valve until the product water is clean, no foam or no cleaning agent (usually 15-30 minutes) Purified water is generally used as solvent or test water for pharmaceutical preparation in pharmaceutical industry, so its standard should strictly conform to the relevant management norms of pharmaceutical industry to ensure the safety and health of water quality.