Method of oil/water separation and device for purification of oil

A specialized device for separating a liquid oil/water mixture comprising:

• a) a low vacuum container or column;
• b) a gas bubble generating system, including a purified gas source, a heater, valves, a gas bubble generator, and pipes that connect the respective parts in turn;
• c) means for inputting and filtering the oil/water mixture liquid, including:
• oil filters, liquid transporting pumps, heaters, valves, and pipes that connect the respective parts;
• d) a low vacuum exhaust including vacuum pumps, condensers, water storage tanks, valves, and pipes that connect the respective parts;
• e) means for outputting and refiltering the purified oil, including:
• liquid transporting pumps, valves, pipes that connect the respective parts, and oil filters serially connected in the pipes of said means for outputting;
• a plurality of gas bubble generators evenly distributed in said gas bubble generator or column, each gas bubble generator being connected in parallel by subpipes with a main pipe, the main pipe penetrating through to an exterior of the container or column wall to connect with the outlet of the gas bubble generating system;
• a liquid inlet in said container or column, connecting with said means for inputting and filtering;
• a vacuum exhaust port provided on the top of said container or column, connecting with an input end of said low vacuum exhaust;
• a liquid output port at the lower part of said container or column, connecting with the input end of said means for outputting and refiltering.