METHOD OF CLEANING DISPERSED MATERIAL FROM PETROLEUM PRODUCTS AND APPROXIMATELY FOR IMPLEMENTATION THEREOF Russian patent published in 2001 - IPC

FIELD: oil pollution removal. SUBSTANCE: invention provides technology for cleaning materials such as soil, grounds, and oil slimes. Material is fed into reaction zone of treatment unit and heated in water steam medium at steam-to-oil weight ratio at least 1:15 to temperature from 250 to 600 C. Resulting gas/steam/hydrocarbon mix is cooled in cooler-condenser to temperature superior to water steam condensation temperature. Major part of condensed petroleum products are collected in receiver, specified part of steam/hydrocarbon mix is returned into reaction zone of steam treatment unit, and remaining part is conveyed into furnace, into which petroleum products from receiver are also fed. Furnace combustion gases are led into heating zone of steam treatment unit. Process proceeds in autothermal mode with content of petroleum products 4-8%. EFFECT: increased degree of cleaning (content of residual petroleum products no higher than 1 wt %) and improved economical efficiency. 3 cl, 1 dwg, 4 ex