| 摘要 |
A method for recovering an oil fraction in crude oil sludge, characterized in having: a first step (1) for mixing crude oil sludge (A) and crude oil (B), and subsequently heating and stirring the mixture of the crude oil sludge (A) and crude oil (B) to obtain a heated and stirred processed product composed of the crude oil sludge (A) and the crude oil (B); a second step (1) for centrifugally separating the heated and stirred processed product at 40-200°C to thereby separate light liquid from the heavy fraction and obtain a light liquid; and a third step (1) for bringing the temperature of the light liquid to the melting point temperature or greater and mixing the light liquid, which is equal to or greater than the melting point temperature, with crude oil (C) in a crude oil transfer tube, the temperature of the crude oil (C) being equal to or greater than the temperature of the light liquid, alternatively, the temperature of the crude oil (C) being less than that of the light liquid, and the difference between the temperature of the light liquid and the crude oil (C) being within 40°C. The present invention provides a method for recovering an oil fraction in crude oil sludge in which sludge is less likely to be generated even when the oil fraction recovered from the crude oil sludge is mixed with crude oil. |
