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Treatment process of high-slag-content sump oil

A treatment process and technology for slag oil, applied in the direction of dehydration/demulsification by chemical methods, etc., can solve problems such as the difficulty of demulsification of sewage oil, achieve the effect of large-scale industrial promotion, simple operation, and ensure the effect of recycling and refining

Active Publication Date: 2016-03-23
YANGZHOU UNIV
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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

Method used

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specific Embodiment

[0022] Specific example: pump 1000L of waste oil from the waste oil tank into the reaction kettle, after heating to 50-90°C, follow steps 2, 3, and 4 to sequentially add KMnO 4 The aqueous solution, demulsifier and flocculant aqueous solution are added to the reactor and mixed with the dirty oil evenly and reacted, among which KMnO 4 : 6000g, demulsifier: 1000g, flocculant PAC: 1600g, after 2.0 hours of reaction, the dirty oil enters the settling separation tank and after 3.0 hours of sedimentation and separation, the upper oil enters the crude oil recovery tank, the middle sewage enters the sewage pool, and the lower water residue enters In the sludge tank, the water slag is discharged into the centrifuge for centrifugal dehydration, and the centrifuge bottom slag is discharged, and the water phase enters the sewage tank. Part of the sewage in the sewage pool is reused, and part of it enters the water treatment workshop for purification.

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Abstract

The invention relates to a treatment process of high-slag-content sump oil and relates to the technical field of separation of high-slag-content sump oil. KMnO4 is adopted as a pre-oxidizing agent to perform oxidizing degradation on colloidal asphaltene on the surface of slag, meanwhile, the stabilizing effect of solid particles on an interfacial film is damaged, in other words, the slag washing effect of an oxidizing agent is achieved, the macromolecular structure of polymers is degraded into small molecules, a regular-layer-shaped structure formed by a surface active agent on an oil and water interface is damaged, steric hindrance is reduced, oil droplet aggregation is promoted, and a good pretreatment effect is achieved for the situation that a subsequent demulsifying agent enters the sump oil to play a role. Then, a demulsifying agent of a compound type and a flocculating agent are sequentially added, due to the fact that demulsifying dross is electrically negative, the inorganic cationic flocculating agent is added to neutralize charges of the solid particles, affinity between the solid particles and water molecules is reduced, the coagulation force between the particles is increased so that the particle size of alum floc can be increased, and therefore further flocculating setting separation happens to part of dross remaining in an oil layer, water and slag are removed, and crude oil is recycled.

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...

Claims

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Application Information

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IPC IPC(8): C10G33/04
CPCC10G33/04
Inventor 张淮浩尹必跃胡斌童杰李丹丹赵静
Owner YANGZHOU UNIV
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