Oil-water separation method

Abstract

The invention discloses an oil-water separation method. An oil-water separating part is used for separating an oil-water mixture into oil and intermediate water, the intermediate water enters a water processing part and is further separated into heavy impurities and water, a coarse separation hydrocyclone of the oil-water separating part is used for separating the oil-water mixture into two branches of light phase and heavy phase, and separated heavy products of the light phase are introduced into the branch of the heavy phase for enrichment, namely the separation efficiency is improved for the light phase, and the separation precision is improved for the heavy phase; for the light phase, although the separation precision is sacrificed, a part of oil runs out from the bottom flow of a first hydrocyclone, only the first hydrocyclone is used in the whole separation process of the light phase, and other hydrocyclones are not used for recleaning and return separation, and thus the separation of the light phase is extremely simple and easy to control; however, for the heavy phase, the adjustability of closed-loop return separation consisting of a second hydrocyclone and a third hydrocyclone can overcome the oil leakage defect of the light phase, and all separation errors are solved in closed-loop return separation.

Description

Technical field [0001] This application relates to an oil-water separation method, in particular to a method for oil-water separation using a gravity separation device. Background technique [0002] The cyclone is a conventional equipment in oil-water separation, which has the advantages of low energy consumption and easy operation. At present, there are two main types of oil-water separation in a typical cyclone. One is that the cyclone discharges oil and water as a light item from the overflow, heavy impurities are discharged from the underflow, and the light item further separates the oil and water. The disadvantage of this separation is that in the actual sorting, because of the fear that the oil will escape from the underflow, the discharge accuracy of the heavy impurities is reduced, so that a part of the heavy impurities enters the overflow port without sufficient centrifugation. The oil-water separation precision equipment is very damaged, and this type of equipment need...

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of oil-water separation method, solve the defect of oil-water separation in the aforementioned prior art

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