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Wood wood life 2017-09-09 09:13:06
In the water treatment industry, reverse osmosis equipment is most commonly used, RO for short. But what are the specific principles and applications of RO?1 what is RORO its meaning is synonymous with reverse osmosis and reverse osmosis is a reverse migration movement, is a under pressure displacement with the aid of interception effect on the choice of a semipermeable membrane separate solution of the solute and solvent separation method, the aperture at about 5 ~ 10. A, it has been widely used in all kinds of liquid purification and enrichment work, one of the most common applications are due to water treatment process, using reverse osmosis technology to inorganic ions, bacteria, viruses and organic matter in raw water and colloidal impurities removal, in order to obtain high quality of pure water. At present, the most widely used is the coiled polyamide composite membrane, whose water flux and removal rate are affected by pressure, temperature, recovery rate, inlet salt content and PH value.2 technical descriptionReverse osmosis technology is one of the most advanced and energy-saving separation technologies. Using reverse osmosis separation characteristics can effectively remove dissolved salt, colloid, organic matter, bacteria and other impurities in water quality, with low energy consumption, no pollution, advanced technology, simple operation and other advantages.
Principles and characteristics of 3RWe sometimes encounter a phenomenon, when the same volume of dilute solution and concentrated solution are placed on both sides of the semi-permeable membrane, the solvent in the dilute solution will naturally pass through the semi-permeable membrane and spontaneously flow to the concentrated solution side, this phenomenon is called infiltration. When the osmosis reaches equilibrium, the liquid level on the side of concentrated solution will be higher than that on the side of dilute solution by a certain height, that is, a pressure difference is formed, and this pressure difference is the osmotic pressure. The osmotic pressure depends mainly on the inherent properties of the solution, that is, it is related to the type, concentration and temperature of the concentrated solution, but has little relation with the properties of the semi-permeable membrane. If a pressure greater than the osmotic pressure is applied on one side of the concentrated solution, the flow direction of the solvent will be opposite to the original osmotic direction and begin to flow from the concentrated solution to the dilute solution side. This process is called reverse osmosis. The technology is currently recognized in the international high-tech system, through the action of external pressure to make the solution of the solvent through the semi-permeable membrane and retain some solute, in order to achieve the effect of penetration.