1. Storage standard of reverse osmosis element membrane
(1) New film (before use)
①. It must be kept in a humid state at all times. Even if it is necessary to temporarily open ro membrane element in order to determine the total number of the reverse osmosis membrane 2 in the same package, it must be kept until the date of use without puncturing the package.
②. When storing in an atmosphere above 10°C, avoid sunlight and choose a place with good natural ventilation. At this time, the storage temperature should not exceed 35°C.
③. If it freezes, it will cause physical damage, so heat preservation measures should be taken and don't freeze.
(2) reverse osmosis element membrane
after passing water
①. It must be kept in a dark place at all times, the storage temperature cannot exceed 35°C, and it must be protected from sunlight.
②. When the temperature is lower than 0℃, freezing is very likely to occur, and anti-freezing measures should be taken.
③. The reverse osmosis membrane elements of composite series products should be immersed in pure water or reverse osmosis filtered water containing stored drugs (sodium bisulfite, 500-100 mg/L, pH 3-6).
④. No matter what the storage is, the membrane cannot be kept in a dry state.
⑤. The concentration value and pH value of the storage solution should be kept within the above range and should be maintained regularly. If there is a possibility of deviation from the above categories, the storage fluid should be re-allocated.
2. Maintenance of reverse osmosis element membrane.
With the widespread application of water purification equipment in the field of sewage treatment, ro membrane element has gradually received high attention from others. The cost of reverse osmosis membranes is one of the most concerned issues for customers. Good maintenance helps to extend the service life of reverse osmosis membranes.
After the mechanical equipment is debugged, the assembly will maintain the reverse osmosis membrane in two ways. The mechanical equipment is debugged and operated for two days (15~24 hours), and then 2% formaldehyde solution is selected for maintenance; or after 2~6 hours of operation, 1% NaHSO3 solution is used for maintenance of the reverse osmosis membrane (should be discharged from the mechanical equipment pipeline To ensure that the mechanical equipment does not leak, close all import and export trade valves). Both methods can achieve satisfactory practical results. The first method increases the cost and is used for a long time when it is idle, and the second method is used for a short time when it is idle.
Three, use of ro membrane
Reverse osmosis membranes are widely used in power engineering, petrochemical equipment, steel, electronic equipment, medicine, food industry, municipal engineering and environmental protection industries, in the elimination of sea and brackish water, heating furnace water supply and drainage, industrial pure water and electronic equipment It plays an important role in the whole process of preparation of ultrapure water system, production of edible mineral water, sewage treatment and special separation.