METHOD OF CLEANING WATER TO REMOVE DISSOLVED AND UNDISSOLVED IMPURITIES Russian patent published in 2003 - IPC

FIELD: water treatment. SUBSTANCE: initial water, designed for use in power engineering, chemical, food, and other industries, is passed into countercurrent filter in top-down direction through floating inert material bed and charge consisting of ionite bed and overlaying filter bed, in particular inert polymer with density above 1 g/cu.cm but less than density of utilized ionite and having granulometric composition from 0.5 to 2.5 mm. Charge is periodically regenerated involving preliminarily lifting it to be pressed against floating inert material bed followed by introduction of regenerating solution in bottom-up direction through charge and floating bed. Entrapped impurities are further removed from regenerating solution by passing it through supplementary filter and ionite beds. EFFECT: increased productivity of cleaning operation performed in one apparatus. 2 cl, 2 dwg