METHOD OF CLEANING SOIL FROM PETROLEUM PRODUCTS AND PLANT FOR REALIZATION OF THIS METHOD Russian patent published in 2004 - IPC

FIELD: chemical technologies; methods of cleaning soil from petroleum products. SUBSTANCE: proposed method includes washing of soil by detergent solution at demulsifying effect at preheating with water steam, thus forming pulp which is filtered from large particles; then liquid and solid phases are separated and are again heated with water steam after which petroleum products, solid particles and water are discharged. Preheating with water steam and cleaning of petroleum products are performed at acceleration of steam to Mach number 1-1.25 followed by deceleration on fixed obstacle at high-frequency oscillations of medium. Plant proposed for realization of this method has bin with starting soil, extractors connected with water steam supply unit, reservoir for separation of pulp which is provided with separator and connected with water steam supply unit and petroleum products, solid particles and water drains. Each water steam supply unit is provided with acoustic gas radiators. One of extractors is made in form of plate with holes of different diameters. EFFECT: enhanced efficiency of cleaning soil from petroleum products; extended field of application. 3 cl, 2 dwg