IMPROVED WATER PURIFICATION SYSTEM Russian patent published in 2001 - IPC

FIELD: chemical technology. SUBSTANCE: improved system for water purification provides for use of method of purification of water flowing from water source, device for embodiment of said method and separate members executing purification at separate stages. Method is characterized by the following stages: withdrawal of some contaminants from flow of concentrated contaminated water; reduction of pressure in flow from working value to value higher than inlet pressure at moment of water passing through separating member and when operation of contaminants withdrawal is executed; initiation of recirculating pump for increasing pressure in flow up to working value; and return at least one part of flow under working pressure from recirculating pump into casing through one of indicated holes (the first and second holes) to pass water again through purification members. In this case recirculating pump pumps recirculation flow at velocity higher than flow velocity at inlet of main pump. EFFECT: higher yield of purified water. 9 cl, 46 dwg