APPARATUS FOR PURIFYING LIQUID, METHOD OF WASHING HOLLOW-FIBRE FILTER AND APPLICATION OF METHOD OF WASHING HOLLOW-FIBRE FILTER Russian patent published in 2011 - IPC C02F9/02 C02F1/44 C02F1/463 B01D29/66 B01D65/02 

FIELD: chemistry.

SUBSTANCE: apparatus for purifying liquid comprises the following, fitted in series: apparatus for inlet of the liquid (1) to undergo purification, an electrocoagulation unit (2), a hollow-fibre filter (3), a storage container (5) with top and bottom connection pipes, a reverse osmosis unit (4) and apparatus for outlet of purified liquid (6). The apparatus is also fitted with a check valve (21) for letting atmospheric air into the storage container (5) when pumping liquid from the storage container. A vacuum can be created in the storage container to let in atmospheric air and carry out reverse washing of the hollow-fibre filter (3). Washing of the hollow-fibre filter involves reverse washing with liquid under pressure created by an air cushion in the top part of the storage container, and the under pressure with a mixture of liquid and air coming from the storage container.

EFFECT: group of inventions prolongs the service life membranes used in the apparatus, increases efficiency of washing the filter while cutting the time of the washing cycle and reducing loss of liquid during washing.

12 cl, 6 dwg