RO technology is the use of differential pressure driven membrane filtration technology. They has been widely used in scientific research, pharmaceutica and beverage, chemical industry, electricity, electronics, paper industry and other fields.
The pore size of RO reverse osmosis membrane is only nanoscale. Under a certain pressure, H2O molecules can go through the RO membrane, while the inorganic salts, heavy metal ions, organic matter, colloid, bacteria, viruses and other impurities in the raw water can not pass RO membrane. Thus pure water and reject water are separated.
System Components
Typically the whole system contains pretreatment systems, reverse osmosis devices, post-treatment systems, cleaning systems, and electrical control systems. Pretreatment system generally contains pumps, chemical dosing devices, quartz sand filter, active carbon filter, and precision filter and so on. Its main role is to reduce the raw water pollution index and residual chlorine in order to achieve the reverse osmosis input water requirements. Pretreatment system are designed on the bare of specific circumstances of raw water. Reverse osmosis unit includes multi-stage high-pressure pump, reverse osmosis membrane element, membrane shell(pressure vessel), frame etc. Its main role is to remove impurities and salts in the water.
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