SEAWATER DESALINATION METHOD Russian patent published in 2016 - IPC C02F1/44 B01D61/06 

FIELD: desalination plants.

SUBSTANCE: invention relates to desalination of sea water by reverse osmosis and can be used to build desalination plants that provide, on a permanent basis, drinking water to local consumers in regions without central water supply. Method of sea water desalination includes pre-treatment of salt water by pumping it with the help of a low-pressure pump through a pre-filter, desalination of sea water on reverse osmosis membrane by pumping through it with the help of a high-pressure pump of salt water treated on a pre-filter. High- and low-pressure pumps are actuated by energy of sea high- and low tides, transformed into water hammer energy on water ram installations actuating high- and low-pressure diaphragm pumps being an integral part of water ram installations. Water ram installations are placed at an angle of 180 degrees to each other in the body of the dam blocking a sea bay or gulf in order to create differential pressure of seawater during high- and low tides necessary for operation of the water ram installations. Diaphragm pumps are placed on a hard rod power transmission hydraulic shock from one pump to another. Diaphragms of low-pressure pumps are of a bigger diameter than the diaphragms of high-pressure pumps, and are made in the shape of movable in radial direction integral parts of pressure pipelines of water ram installations. At the output of diaphragm pumps connected by common rigid rod, there are installed pneumohydraulic batteries for smoothing of pressure ripples caused by uneven operation of ram water installations. Purification of pre-filters and reverse osmosis membranes from dirt accumulated over time is effected by supplying in pulse mode of seawater pulsed from diaphragm pumps to filters and membranes when pneumohydraulic batteries are disconnected.

EFFECT: technical result consists in the increase of the method energy efficiency way, reduction of the final product (fresh water) cost at the expense of use of the energy of sea tides to drive the pumps.

1 cl, 1 dwg