Filter and method for the desalination of water by means of reverse osmosis of the centrifugal type, involving the generation of dean vortices

摘要

This invention concerns a method for desalination of sea water and a design and construction of a centrifugal filter for desalination of water. The process uses the filter developed based on reverse osmosis technology as a fundamental component that uses hollow fiber membrane modules arranged in a spiral manner around a central support pipe and distributed in concentric rings around the periphery of the rotating section to favor the formation of Dean vortices. Wherein the membrane is built with a structure of an aromatic polyamide as the first layer, followed by a layer of polyestersulfone and a support layer of polyester; applying the material Kevlar 49 in position 1 and 4 on the aromatic chain structure to increase the structure and resistance of the membrane.

主权项

1. A process for sea water desalination, wherein the sea water containing salt is collected from a sea via an open intake and transported via a pump to an elevated tank, passing the sea water through a sand filter to remove suspended solids from the sea water, the sea water is then pumped through a cartridge filter to form a prefiltered sea water, the prefiltered sea water is then pumped into an equalization tank from which the prefiltered sea water is pumped at a constant speed through a rotary reverse osmosis filter, the filter defining a plurality of membranes configured to receive the prefiltered sea water containing salt therein and undergo centrifugation as a motor rotates the rotary reverse osmosis filter such that the sea water containing salt therein is passed through the plurality of membranes and undergoes reverse osmosis while the motor rotates the rotary reverse osmosis filter, from which a first fluid and a second fluid are released, the first fluid being a desalinated treated water received from a top end of the plurality of membranes, which flows into a basin located below the rotary reverse osmosis filter and is then transported to a post-treatment tank, and the second fluid being a concentrated solution that is expelled; and wherein the rotary reverse osmosis filter generates Dean vortices, within the prefiltered sea water contained within the plurality of membranes while the motor rotates the rotary reverse osmosis filter, such that the Dean vortices promote self-cleaning of a plurality of pores disposed in the plurality of membranes and increase fluid pressure on an inner surface of the plurality of membranes.