Reverse osmosis technology has been widely applied in scientific research, medicine, beverages, seawater desalination and other fields at present. Reverse osmosis equipment produced by Beijing Yuanlai Water Treatment Equipment Co., LTDROThe pore size of reverse osmosis membranes is at the nanometer level.ROUnder certain pressure, reverse osmosis membranes can effectively filter out inorganic salts, heavy metal ions, organic substances, colloids, viruses and other impurities in the source water, thereby strictly distinguishing pure water that can pass through from concentrated water that cannot. However, the long-term use of reverse osmosis membranes will cause a lot of adsorption to adhere to the membranes, thereby reducing efficiency. How should we maintain reverse osmosis equipment?

ROWhat kind of pretreatment is generally required for the system

　　The typical composition of a pretreatment system is as follows: coarse filtration(～80Micron)To remove large particles, oxidants such as sodium hypochlorite are added, followed by precise filtration through a multi-media filter or clarifier. Then, sodium bisulfite is added to reduce the residual chlorine and other oxidants. Finally, a security filter is installed before the high-pressure pump inlet. The function of the security filter, as the name suggests, is to serve as a constant safety measure to prevent accidental damage to the impeller and membrane elements of the high-pressure pump by large particles. Water sources with a higher content of suspended particles usually require a higher degree of pretreatment to meet the specified influent requirements. For water sources with high hardness content, it is recommended to use softening or add acid and scale inhibitors, etc. For water sources with high microbial and organic matter content, activated carbon or anti-pollution membrane elements should also be used.

Reverse osmosis process, ion exchange process

　　Under many influent conditions, both ion exchange resins and reverse osmosis are technically feasible. The choice of process should be determined by economic comparison. Generally speaking, the higher the salt content, the more economical reverse osmosis is; the lower the salt content, the more economical ion exchange is. Due to the wide popularity of reverse osmosis technology, reverse osmosis has been adopted＋Ion exchange process or multi-stage reverse osmosis or reverse osmosis＋The combined process of other deep desalination technologies has become a recognized water treatment solution that is more reasonable in terms of technology and economy.

How often should the reverse osmosis pure water machine system be cleaned

　　Under normal circumstances, when the standardized flux decreases10～15%At this time, or the desalination rate of the system decreases10～15%Or the operating pressure and the pressure difference between sections increase10～15%It should be cleaned.ROSystem. The frequency of cleaning is directly related to the degree of system pretreatment. WhenSDI15＜3At that time, the cleaning frequency may be once a year4"Second;" whenSDI15in5When left or right, the cleaning frequency may need to be doubled.

How long is the system allowed to be shut down without flushing

　　If the system uses a post-delay agent, when the water temperature is20～38℃Between them, approximately4Hours; in20℃When it's below, approximately8Hours; If no scale inhibitor is used in the system, approximately1Oh my god.

Reverse osmosis membrane elements can generally be used for several years

　　The service life of a membrane depends on its chemical stability, the physical stability of the components, washability, the source of the feed water, pretreatment, cleaning frequency, and the level of operation and management, etc. The reverse osmosis equipment of Beijing Yuanlai Water Treatment Equipment Co., Ltd. is usually3-5More than one year.