METHOD FOR TECHNICAL OIL PURIFICATION Russian patent published in 2024 - IPC C10G31/09 B01D36/00 

FIELD: oil purification.

SUBSTANCE: invention relates to the separation and purification of liquid media, in particular oils and hydraulic fluids, from solid impurities, emulsified and dissolved water. A method for purifying technical oils from mechanical impurities and water is disclosed, including forced tangential supply of the original oil to the prefilter. In the prefilter, under the influence of flow swirling, solid impurities and water are separated. After this, the partially purified oil in the prefilter is divided into two streams, one of which is mixed in the circulation circuit with the flow of the original oil, and the second stream from the prefilter is ejected into the tangential separator. Next, a steam-air mixture is removed from the solvent under a vacuum of 75 kPa. Partially purified oil is forcibly fed to a fine filter made of a polymer of a spatially globular structure with a pore size of 0.4-0.6 microns. At the outlet of the filter, purified oil is selected. In this case, the separation of the main part of solid impurities and free water is carried out on a partial-flow hydrodynamic prefilter, one output flow of which in the circulation circuit is regulated by a valve, and the second is cleaned on the hydrophobic separating partition of its filter element. The partition is made of a thin-walled plastic pipe with the ability to change the size of the pores - slot channels. The second stream from the partial-flow hydrodynamic prefilter is saturated with inert gas and dispersed before being fed to the fine filter. Then cavitation is initiated by swirling and decelerating the flow in the vortex chamber on the HPLM partition at the bottom of the tangential separator cup. After this, dissolved water is evaporated from the oil on the developed porous side surfaces in the upper part of the tangential separator glass, and in the lower part at the exit from it the dispersed flow of oil is turned 180° upon contact with the concave surface of the reflector and particles of solid impurities and water vapour are separated with bubbles of air and inert gas. The partially purified oil is then collected at the bottom of the tangential separator as it flows through the perforated hydrophobic coated metal mesh reinforced side wall of the deflector.

EFFECT: improved efficiency of oil purification.

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