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The Difference Between DTRO Disc Tube Membrane And General Spiral Membrane
- Aug 06, 2018 -

The difference between DTRO disc tube membrane and general spiral membrane


DTRO membrane technology is the disc tube membrane technology, which is divided into DTRO (disc type reverse osmosis) and DTNF (disc type nanofiltration).


Its membrane module construction is completely different from the traditional membrane. The raw liquid channel: the disc membrane module has a patented flow channel design, using an open flow channel, the feed liquid enters the pressure vessel through the inlet, and the diversion flow The passage between the disc and the outer casing flows to the other end of the assembly. At the other end flange, the liquid enters the deflector through the passage, and the treated liquid flows through the filter membrane at the shortest distance, and then reverses 180o. A membrane surface flows from the notch at the center of the deflector to the next guide disc, thereby forming a double "S"-shaped path on the surface of the membrane from the circumference of the guide disc to the center of the circle, to the circumference, and then to the center of the circle. The concentrate finally flows out of the feed end flange. The distance between the two guide plates of the DTRO membrane is 4 mm, and the surface of the baffle has a certain arrangement of radiation. This special hydraulic design makes the treatment fluid flow under the pressure of the membrane surface to form turbulence when it collides with radiation, increasing the transmission rate and self-cleaning function, thus effectively avoiding membrane clogging and concentration polarization, and successfully extending it. The service life of the diaphragm is also easy to clean the scale on the diaphragm during cleaning, ensuring that the disc tube membrane group is suitable for treating wastewater with high turbidity and high sand content, and adapting to more severe water inlet conditions.


Permeate flow channel: The filter membrane consists of two concentric annular reverse osmosis membranes with a layer of filiform scaffold in between, allowing the purified water passing through the membrane to flow quickly to the outlet. The outer ring of the three layers of annular material is welded by ultrasonic technology, and the inner ring is opened to be a clean water outlet. The permeate flows along the filament support in the middle of the diaphragm to the permeate passage at the periphery of the center rod. The O-ring on the deflector prevents the raw water from entering the permeate passage. The distance from the diaphragm to the center is very short. And the filter membranes in the assembly are equal