ION EXCHANGE FILTER Russian patent published in 2022 - IPC B01D24/02 B01D24/46 B01J47/02 

FIELD: chemical and physical processes.

SUBSTANCE: invention relates to equipment for ion exchange processes. Ion-exchange filter in the lower part contains a grate, under which there is an elastic film for creating an air cushion. Inside the ion-exchange filter there is a layer of ionite particles with density less than density of the treated water, and a layer of particles of inert material with density greater than density of the treated water. Bottom of the ion-exchange filter is equipped with a nozzle for air inlet and outlet in order to inflate and deflate the air cushion to ensure the following conditions of the filter layers during operation: for water treatment, regeneration and washing steps, a fixed layer of ion-exchange particles, a layer of inert material particles and an air cushion are located from top to bottom along the height of the ion-exchange filter, for the step of stopping the supply of water, a layer of ionite particles, a free volume and a layer of particles of inert material are located from top to bottom along the height of the ion-exchange filter, for the stage of backwashing, a layer of fluidised ionite and a layer of particles of inert material are located from top to bottom along the height of the ion-exchange filter.

EFFECT: possibility of ion-exchange water treatment using ion-exchange materials with density less than density of the treated water.

1 cl, 3 dwg