FIELD: oil and gas industry.
SUBSTANCE: invention is related to oily waste thermal dewatering method, including stirring by blowing of oily wastes by inert gas, at that surfactant is introduced into the inert gas flow and the above surfactant is represented by acid hydrolysis product of soap stock, which is a by-product of vegetable oil refinement, with acid index of 100-145 mg KOH/g in quantity of 5·10-3-8·10-3 weight fractions per one weight fraction of oily waste.
EFFECT: reducing time of water evaporation in result of increase of oily waste heating rate and preventing foam formation.
2 cl, 1 dwg, 2 tbl, 1 ex
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