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Reverse Osmosis System Technology

Reverse osmosis (RO) is a very effective membrane separation unit operation, Reverse Osmosis System is relying on reverse osmosis membrane under pressure in the solution of solvent and solute separation process. Reverse osmosis technology can reduce the load of ion exchange resin by more than 90%, and the amount of regenerant used in resin can be reduced by 90%. In addition to desalination, Reverse Osmosis System it can remove particulates, organic substances and colloidal substances in the water and reduce the pollution of ion exchange resin , Reverse Osmosis System To extend the service life has a good effect.

However, for a long time, reverse osmosis technology seems to be powerless for the removal of free CO2 contained in water because conventional reverse osmosis techniques must control the LSI (Langer saturation index) value in the influent to prevent reverse osmosis membrane fouling The The LSI value of an important parameter is the PH value of the influent, if the PH value is acidic, it is not easy to scale, Reverse Osmosis System if the pH is alkaline, the fouling tendency is very obvious. Therefore, the traditional process in the reverse osmosis system before adding HCl solution, can well prevent CaCO3, MgCO3 and other precipitates fouling; and rarely in the reverse osmosis system before adding NaOH solution.

Vacuum degassing tower is also a way to remove CO2, Reverse Osmosis System in addition to the removal of O2 and other substances in the water, removal efficiency than the removal of high CO2 tower. It works by using a device to spray water from the next, after the filter material dispersed, the water CO2 and O2 escape, while the vacuum pump in the middle of the tower vacuum, CO2 and O2 by vacuum pump suction, Reverse Osmosis System degassing After the pure water flow to the bottom of the tower, the mixed bed after the pump pressure into the post-treatment mixed bed. If the vacuum degassing column is weakly acidic, the carbonate in the water can also be removed in large quantities, Reverse Osmosis System because when the pH of the water is less than 4.3, the carbonic acid in the water is almost completely in the form of carbon dioxide, due to the non-degassing reverse osmosis Water is generally weak acid, Reverse Osmosis System so the vacuum degassing tower is generally placed in the post-reverse osmosis.

Vacuum degassing tower structure is more complex, large units have degassing tower, vacuum pump, etc., in order to ensure uniform dispersion of the water, the filter layer height must be set very high, Reverse Osmosis System resulting in degassing tower height of ten meters, the equipment occupies a huge space, In addition, because the degassing tower level control is very strict, the liquid level is too high, easy to degassing efficiency, too low, easily lead to pumping the air pump, causing production accidents, so the use of the level gauge must be very sensitive. Although the vacuum degassing tower will not bring new impurities into the outside world,Reverse Osmosis System but because of the complex structure of the device, covers an area of space, high operating costs, so the actual production applications are subject to certain restrictions.

With the development of science and technology, Reverse Osmosis System the current variety of reverse osmosis scale inhibitor, scale efficiency is getting higher and higher, such as Hangzhou XX water treatment technology company's product X1, can do concentrated water side LSI value of 3.0 level. B companies use this scale inhibitor, that is, in addition to the addition of alkali before the addition of scale inhibitor, Reverse Osmosis System the actual operation of reverse osmosis can ensure that more than three months cleaning time, alkali scaling this problem has been a very good solution.