High-temperature hydrolysis type oil-containing sediment harmless comprehensive treatment process

Abstract

The invention relates to a high-temperature hydrolysis type oil-containing sediment harmless comprehensive treatment process. The invention mainly solves the problems that the prior treatment processof oil-containing sediment in oil fields is simple, and the treatment of oil-containing sediment which contains many impurities is not thorough. The treatment process is characterized by comprising the following steps: (1) sludge fluidization and pretreatment: discharging solid particles with a diameter larger than 5mm by a sorting box and a rotary drum separating device; (2) sludge tempering: sequentially introducing the conveyed mixture into three tempering tanks connected in series, conveying the oil-containing sediment separated by the tempering tanks to a two-phase centrifuge, and conveying the floating oil to an oil water separator; and (3) mechanical separation: carrying out solid liquid separation by the two-phase centrifuge, and carrying out oil water separation by the oil-water separator. The high-temperature hydrolysis type oil-containing sediment harmless comprehensive treatment process can be used to treat oil-containing sediment with different oil field types and complexcomponents, the reduction and harmless treatment of the oil-containing sludge can be effectively realized, the operation is simple, and the running cost is low.

Description

technical field [0001] The invention relates to the field of oilfields, in particular to a high-temperature hydrolysis type harmless comprehensive treatment process for oily sludge generated during oilfield production and crude oil treatment. Background technique [0002] Due to the different sources of oily sludge, its components and properties are also different. Through sampling and analysis of various types of oily sludge, oily sludge generally contains 15-50% oil, up to 60%. Among them, the bottom sludge of the sewage settling tank is black in appearance, viscous, contains more oil, has serious emulsification, fine particles, less impurities, and is in the form of "oil sludge" with a relatively uniform distribution; the bottom sludge of the oil tank contains the most oil, and the impurities are as follows: Mainly sand and mud; the bottom sludge of the three-phase separator is mostly black-yellow in appearance, rich in oil and viscous, with larger particles than the bott...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the shortcomings of the existing oilfield oily sediment treatment process that is simple and incomplete treatment of oily sludge containing many impurities, the present invention provides a high-temperature hydrolysis type oily sediment harmless comprehensive treatment process, the high-temperature hydrolysis type The harmless comprehensive treatment process of oily sediment can treat oily sludge with different types and complex components in oil fields, and can effectively realize the reduction and harmless treatment of oily sludge, with simple operation and low operating cost

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