A treatment process for high residue oil

Abstract

The invention discloses a process for treating dirty oil with high residue content, and relates to the technical field of separation of dirty oil with high residue content. The present invention uses KMnO4 as a pre-oxidant to oxidize and degrade the colloidal asphaltenes on the surface of the slag, and at the same time destroy the stabilizing effect of solid particles on the interfacial film, that is, to exert the "slag washing" effect of the oxidant, and degrade the macromolecular structure of the polymer into Small molecules can destroy the regular layered structure formed by surfactants on the oil-water interface, reduce steric hindrance, promote the aggregation of oil beads, and play a good pretreatment role for the subsequent entry of demulsifiers. Then add compound demulsifier and flocculant in turn. Since the demulsification scum is electronegative, an inorganic cationic flocculant is added to neutralize the charge of solid particles, reduce the affinity between solid particles and water molecules, and increase the distance between particles. The cohesion among them can increase the particle size of the flocs, so that part of the scum remaining in the oil layer can be further flocculated and separated to achieve dehydration, deslagging and recovery of crude oil.

Description

technical field [0001] The invention relates to the technical field of separation of waste oil with high residue content. Background technique [0002] The contents of salts, oils, colloids, asphaltene, solid particles and The salinity is high. Sludge oil comes from various sources, and its properties vary greatly. There are water-in-oil, oil-in-water, and multiple emulsification systems formed by water-in-oil and oil-in-water. It contains natural emulsifiers such as colloids, asphaltene, and solid particles, which are enriched at the oil-water interface to form a firm interfacial film with extremely strong interfacial tension and extremely difficult to handle. In the actual production of the refinery, the waste oil produced often contains high water residue, generally the amount of water residue is 10-80%. Long-term storage of dirty oil is not only a waste of oil resources, but also brings great pollution to the environment, so it must be treated harmlessly. [0003] At...

AI Technical Summary

Problems solved by technology

[0004] With the development of oil displacement technology, various chemicals added in production make the emulsification stability of the subsequent slop oil extremely high, but adding a single demulsifier often has great limitations, which makes the demulsification of slop oil more difficult