LIQUID PURIFICATION METHOD Russian patent published in 2017 - IPC C02F1/44 

FIELD: chemistry.

SUBSTANCE: liquid purification method consists in, at least, one automatically started liquid purifying cycle, during which the initial liquid is purified and the liquid purifying agent is rinsed with a liquid medium, followed by the renewal of the liquid purification. During this cycle, the initial liquid is supplied to the liquid purifying unit through the source liquid supply line, wherein the initial liquid is supplied to the liquid purifying agent through the pressure increasing means along the mixing line of the initial and drainage liquid. After the liquid purifying agent, the purified liquid enters the line of the purified liquid, and the drainage liquid is fed to the feed liquid in the recirculation line, and the resulting mixture enters the liquid purifying agent. After the predetermined time period, the liquid purifying process is interrupted for washing the liquid purifying agent with a liquid medium designed to remove contaminants generated on the inner surface of the liquid purifying agent. The liquid medium after the liquid purifying agent is discharged into the drain at high speed. During, at least, one liquid purifying cycle, prior to washing the liquid purifying agent with a liquid medium, the liquid purifying process is interrupted, at least, once for a short period of time sufficient to wash the liquid purifying agent with a mixture of drainage and initial liquid, at which the polarization layer of the contaminants is destroyed, formed on the inner surface of the liquid purifying agent, followed by the resumption of the liquid purifying process after each short washing of the liquid purifying agent. When washing the liquid purifying agent with a liquid medium, the duration of which exceeds the duration of, at least, one washing of the liquid purifying agent, at which the polarization layer of the contaminants is destroyed, a mixture of the initial and drainage liquid is used as a liquid medium.

EFFECT: reducing the amount of the initial liquid used, reducing the amount of contaminants on the liquid purifying agent, prolonging the life of the liquid purifying agent.

7 cl, 3 dwg