RO Disc Cushions
FLAT DISC REVERSE OSMOSIS MEMBRANE CUSHIONS
The modules are made up of a series of reverse osmosis membrane cushions and discs which, when stacked, form a very sturdy construction capable of withstanding high pressures in order to concentrate very high conductivity liquids of the order of 50,000-70,000 µS / cm, concentrate reverse osmosis concentrates to reduce volumes.
As an example, sea water has on average an electrical conductivity of 40 mS / cm with a minimum of 10 mS / cm in some specific areas, these membranes, on the other hand, are able to concentrate liquids, electrical conductivity of the order of 50. -60 mS / cm.
The module consists of filter discs placed one above the other, where each hydraulic disc is equipped with two O-rings of the same size. In addition, there are four other O-rings of different sizes for sealing around the tie rod and flanges. The discs one above the other are put under tension by means of bolts screwed on the central pin.
The filter discs have a central hole which is used for fixing to the central pin while the external surface, upper and front, is read by a membrane sheet with tangential filtration.
The type of filter medium can be of the type:
- Low rejection Reverse Osmosis membrane (97.0% NaCl rejection)
- Reverse osmosis membrane with medium rejection (98.8% NaCl rejection)
- Special Nanofiltration Membrane (available upon request)
Reverse osmosis modules can support very high pressures:
- Reverse osmosis membrane with standard pressure <70 bar
- Reverse osmosis membrane at medium pressure <90 bar
- Reverse osmosis membrane at very high pressure <120 bar
Typical Applications:
- Treatment of leachate from landfills
- Concentration of highly loaded industrial waste water
- Adaptation of existing modules
- Industrial water with high salt content increased turbidity and SDI
Principle of operation:
The feed water is distributed to the pressure vessel through the inlet port. Scrolls along a passage between the disc stack and the outer casing. At the end of the flange the water passes through a series of channels that allow it to drain the water into the chamber under the filter disc. From this chamber the water passes through the openings / crevices in the disc and then to the top. The filtered water passes through the reverse osmosis membrane and is transported to the permeate collector. The concentrate instead comes out from the second port on the head of the membrane.
Reverse Osmosis DT RO PF ROCHEM
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