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Treatment process of high-slag-content and water-containing sump oil

A treatment process, technology for water and sewage oil, applied in the petroleum industry, hydrocarbon oil dehydration/demulsification, dehydration/demulsification by chemical methods, etc., can solve problems such as difficulty in demulsification of sewage oil, and achieve the value of large-scale industrial promotion and operation The effect of simplicity and low investment in equipment

Active Publication Date: 2016-03-23
YANGZHOU UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] With the development of oil displacement technology, various agents added in crude oil extraction make the emulsification stability of subsequent dirty oil extremely high, while adding a single demulsifier often has great limitations, which makes the demulsification of dirty oil more difficult

Method used

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Examples

Experimental program
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Effect test

example

[0028] Pump 1000L of dirty oil from the dirty oil tank into the reaction kettle, heat it to 80°C, and follow steps 2, 3, 4, 5, and 6 to add lye, acid, demulsifier and flocculant into the reaction kettle and mix with the sewage The oil is mixed well and reacted, where NaOH: 2000g, H 2 SO 4 : 6000g, demulsifier: 1000g, flocculant PAC: 1600g. Pump the dirty oil in the reaction kettle into the ultrasonic generator for ultrasonic treatment (ultrasonic frequency is 22KHz, power is 500W). After ultrasonic treatment for 10 minutes, it enters the sedimentation and separation tank for sedimentation and separation for 3.0 hours. The upper layer oil enters the crude oil recovery tank, and the middle layer sewage After entering the sewage tank, the lower layer of slag enters the sludge tank, and then discharges the slag into the centrifuge for centrifugal dehydration, discharges the bottom slag, and the water phase enters the sewage tank, and then reuses part of the sewage in the sewage t...

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Abstract

The invention relates to a treatment process of high-slag-content and water-containing sump oil and relates to the technical field of separation and treatment of slag-containing and water-containing sump oil. Firstly, the sump oil is washed with alkali liquor, emulsification systems of a W / O type and an O / W / O type in the sump oil are subjected to phase inversion to form emulsion of an O / W type, the viscosity of the high-slag-content and water-containing sump oil and the interfacial tension of the emulsion systems can be effectively reduced due to formation of the emulsion of the O / W type, and therefore mass transfer of a subsequent demulsifying agent is facilitated, and the demulsifying effect of the subsequent demulsifying agent fully acts. Then, sulfuric acid is added and made to react with sodium naphthenate, sodium naphthenate is reduced into naphthenic acid without the emulsifying effect, and therefore the emulsifying effect of sodium naphthenate is eliminated. Next, a demulsifying agent of a compound type and a flocculating agent are sequentially added, and further flocculating setting separation happens to part of dross remaining in an oil layer. Finally, the sump oil is treated through the acoustic cavitation effect of ultrasonic waves, the mechanical vibration effect and the heat treatment effect, water and slag are further removed, and crude oil is recycled.

Description

technical field [0001] The invention relates to the technical field of separation and treatment of slag-containing and water-containing waste oil. Background technique [0002] The content of salts, oils, colloids, asphaltene, solid particles and salinity in the high-residue and water-containing sewage oil produced by the waste oil and sewage outlets of various production units of the refinery are relatively high. Sludge oil comes from various sources, has great differences in properties, and contains a lot of water, generally with a water volume fraction of 10% to 80%. 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, which is extremely difficult to handle. Long-term storage of dirty oil is not only a waste of oil resources, but also brings great pollution to the environment. Therefore, it must be treated in a harmless manner. [0003] At present, there are vari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/04C10G33/00
CPCC10G33/00C10G33/04
Inventor 张淮浩尹必跃胡斌童杰李丹丹赵静
Owner YANGZHOU UNIV
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