Method for purifying liquid and system for the implementation thereof

A liquid purification system comprising:

• a liquid purification unit comprising:
• at least one recirculation unit comprising a raw liquid container, a recirculation line, and a system of valves, and
• a filtration unit comprising at least one fine liquid purification device configured to purify raw water and a liquid circulation means,
• a line for supplying fluid comprising the raw water from the raw liquid container to the at least one fine liquid purification device,
• a pure liquid unit,
• a pressure generation means disposed outside of the raw liquid container and for generating a pressure using a compressed gas energy to pressurize the raw liquid container to move the fluid from the raw liquid container to the filtration unit during a second stage of a three-stage liquid filtration cycle, and
• the liquid circulation means for moving the fluid to the at least one fine liquid purification device and for generating a recirculation unit pressure that pressurizes the recirculation line to move drain liquid from the at least one fine liquid purification device to the raw liquid container during the second stage of the three-stage liquid filtration cycle,
• wherein the liquid purification unit is configured to perform the three-stage liquid filtration cycle and to return the drain liquid into the raw liquid container prior to completion of the liquid filtration cycle with continuous recirculation while maintaining a liquid flow velocity so as to control a rate of supplying the fluid into the liquid filtration unit from the liquid recirculation unit while the drain liquid is directly supplied under pressure through the recirculation line to the raw liquid container from the at least one fine liquid purification device while simultaneous stirring of the raw water and the drain liquid within the raw liquid container,
• wherein the raw liquid container is configured to remove the drain liquid from the raw liquid container using the compressed gas or compressed gas and liquid mixture energy at a third stage of the cycle, and is further configured to convert a system energy into the compressed gas or compressed gas or liquid mixture energy at the third stage of the cycle,
• wherein the raw liquid container comprises a gas- and liquid-impermeable partition disposed such that the compressed gas or compressed gas and liquid mixture energy is transmitted to the system through the gas- and liquid-impermeable partition, and through which further conversion of a system energy into the compressed gas or compressed gas and liquid mixture energy occurs during the third stage of the filtration cycle.