CN105419855B - A kind of handling process of high slag inclusion sump oil - Google Patents
A kind of handling process of high slag inclusion sump oil Download PDFInfo
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- CN105419855B CN105419855B CN201610016603.XA CN201610016603A CN105419855B CN 105419855 B CN105419855 B CN 105419855B CN 201610016603 A CN201610016603 A CN 201610016603A CN 105419855 B CN105419855 B CN 105419855B
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- oil
- sump oil
- flocculant
- slag inclusion
- slag
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G33/00—Dewatering or demulsification of hydrocarbon oils
- C10G33/04—Dewatering or demulsification of hydrocarbon oils with chemical means
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- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
A kind of handling process of high slag inclusion sump oil, is related to the separation technology field of high slag inclusion sump oil.The present invention uses KMnO4Oxidative degradation is carried out to the gum asphalt on slag surface etc. as pre-oxidation agent, firm effect of the solid particle to interfacial film is destroyed simultaneously, play " washery slag " effect of oxidant, the macromolecular structure of polymer is degraded to small molecule, the regular layer structure that destruction surfactant is formed on oil-water interfaces, steric hindrance is reduced, promotes oil droplet coalescence, is that subsequent demulsifier plays good Effect of Pretreatment into playing a role.Then composite emulsion breaker, flocculant are added successively, because demulsification scum silica frost is in electronegativity, therefore add the electric charge in inorganic cation flocculant with solid particles band, reduce the affinity of solid particle and hydrone, increase the cohesiveness between particle to increase the particle diameter of flco, so that part remains in the further flocculation deposition seperation of scum silica frost of oil reservoir, realize dehydration, de- slag and reclaim crude oil.
Description
Technical field
The present invention relates to the separation technology field of high slag inclusion sump oil.
Background technology
Cut from certain oil plant workshop Central Plains oil tank and handle sewage between water, electric treating, equipment cleaning and water treatment vehicle
When the high slag inclusion sump oil that produces in salt, oils, colloid, asphalitine, the content of solid particle and salinity it is higher.Sump oil
Source is more miscellaneous, and nature difference is big, there is Water-In-Oil, oil-in-water and the multiple emulsification system formed by Water-In-Oil and oil-in-water.Its
The naturally occurring emulsifying agents such as colloid, asphalitine, solid particle that body contains, are enriched in oil-water interfaces, form firm interfacial film, have
Extremely strong interfacial tension, intractability is very big.In the actual production of oil plant, produced sump oil often contains higher water
Slag, general grain slag amount is in 10-80%.Sump oil long-term storage is not only the waste of petroleum resources, and can be brought greatly to environment
Pollution, it is therefore necessary to harmless treatment is carried out to it.
Method at present for the de- slag use of sump oil breaking emulsion and dewatering is varied, and respectively has pros and cons.Hot sedimentation and routine
Chemical demulsification method it is unsatisfactory to emulsifying serious sump oil, particularly high slag inclusion sump oil demulsification, handle more difficult；Electrification
Method processing sump oil is higher to the equipment requirement of electrochemistry, is not suitable for promoting；Though burning method can reduce demulsification sludge to environment
Pollution, but complex operation, processing cost is high, and the SO of generation2It is larger Deng the harm to environment；Though centrifugal process is to sump oil three-phase
The treatment effect of separation is preferable, but expense is too high, with larger limitation；Biological treatment pollutes small but long processing period.
With becoming increasingly conspicuous for environmental issue, find a kind of low processing cost, demulsification efficiency high and environment-friendly technique turns into dirt
The inexorable trend of oil processing.
With the development of technology of reservoir sweep, the various medicaments added in exploitation cause the emulsion stability pole of follow-up sump oil
Height, and adding single demulsifier often has significant limitation, this causes sump oil demulsification more difficult.Therefore, it is necessary to
Addition pre-oxidation agent, plays the Effect of Pretreatment of pre-oxidation agent in chemical demulsification technique, is that follow-up demulsifier and flocculant are played
Effect provides guarantee, so as to realize the efficient demulsification to high slag inclusion sump oil.
The content of the invention
The present invention seeks in view of the shortcomings of the prior art with defect, propose a kind of handling process of high slag inclusion sump oil.
The technical scheme is that：High slag inclusion sump oil is heated to 50~90 DEG C, KMnO is mixed into successively4The aqueous solution, demulsification
Agent, flocculant aqueous solution, make oil, water, slag three phase separation through sedimentation.
The present invention is in view of KMnO4The strong oxidizing property of itself and the demulsification in laboratory, it is proposed that use KMnO4, demulsifier
And the breaking emulsion and dewatering of the high slag inclusion sump oil in flocculant process refinery takes off slag technique.The present invention uses KMnO4It is used as pre-oxidation agent pair
The gum asphalt on slag surface etc.（General demulsifier is difficult to play a role to this）Oxidative degradation is carried out, while destroying solid particle
To the firm effect of interfacial film, that is, " washery slag " effect of oxidant is played, the macromolecular structure of polymer is degraded to small molecule,
The regular layer structure that destruction surfactant is formed on oil-water interfaces, reduces steric hindrance, promotes oil droplet coalescence, is subsequent break
Emulsion, which enters to play a role, plays good Effect of Pretreatment.Then composite emulsion breaker, flocculant are added successively, due to demulsification
Scum silica frost is in electronegativity, therefore adds the electric charge in inorganic cation flocculant with solid particles band, reduces solid particle and moisture
Cohesiveness between the affinity of son, increase particle is to increase the particle diameter of flco, so that the scum silica frost that part remains in oil reservoir enters
The flocculation deposition seperation of one step, realizes dehydration, de- slag and reclaims crude oil.
Cost of the present invention is relatively low, simple to operate, reaction is gentle, the water quality of abjection water is good, dehydration rate is high and crude oil recovery rate
It is high.High slag inclusion sump oil after processed by the invention, it is 32.6% to make oil content, water content 32.4%, and slag content is 35.0% slag inclusion
The dehydration rate of sump oil reaches 97.2%, and crude oil recovery rate reaches 95.6%, compared with simple demulsifier breaking emulsion and dewatering reclaims crude oil,
It has been respectively increased 47.6% and 31.0%.
The present invention is applied to the processing of the high slag inclusion sump oil in each refinery, ensure that oil recovery freshening, realizes the money of sump oil
Sourceization is recycled, and the economic benefit of enterprise is also increased while processing sump oil environmental recovery bonds, with larger commercial introduction valency
Value.
Further, KMnO of the present invention4KMnO in the aqueous solution4Mixing ratio with high slag inclusion sump oil is 2000~10000
mg∶1L.In the concentration range, KMnO4Oxidative degradation not only is carried out to the gum asphalt on slag surface etc., by gum asphalt
Small molecule is degraded to Deng macromolecular structure, firm effect of the solid particle to interfacial film, and the table that can be destroyed in sump oil is reduced
The regular layer structure that face activating agent is formed on oil-water interfaces, reduces steric hindrance, promotes oil droplet coalescence, subsequently adds
Demulsifier, which plays a role, plays good Effect of Pretreatment.Concentration range KMnO4Can make sump oil breaking emulsion and dewatering rate improve 20%~
30%。
The mixing ratio of the demulsifier and high slag inclusion sump oil is 750~1750 mg: 1L.In the concentration range, demulsifier
Occur physics, chemical reaction with the naturally occurring emulsifying agent in sump oil, cause oil-water interfaces property to change, destroy the steady of interfacial film
Determine structure, realize the reduction of oil water interfacial tension, expand the field of activity of oil-water interfaces.The concentration range demulsifier can make sump oil
Breaking emulsion and dewatering rate improves 6%~17%.
The mixing ratio of flocculant and high slag inclusion sump oil is 400~2000 mg: 1L in the flocculant aqueous solution.It is dense at this
In the range of degree, flocculant can neutralize the electric charge of solid particles band, and the scum silica frost remained in after the completion of demulsification in oil reservoir is further
Flocculating setting, improves the breaking emulsion and dewatering rate of sump oil.The concentration range flocculant can make sump oil breaking emulsion and dewatering rate improve 5%~
11%。
Embodiment
High slag inclusion sump oil carries out breaking emulsion and dewatering and takes off Slag treatment step：
1st, 1000L high slag inclusion sump oil is taken to heat 1.5~2.0 h in 50~90 DEG C of water-baths（Optimal is 2.0 h）, preferably
80℃。
2nd, after 40 min, the KMnO that 5L concentration is 400-2000 g/L is added into sump oil4The aqueous solution, stirring mixes it
Close uniform.
3rd, after 30 min, 750-1750g demulsifier is added into sump oil, stirring is well mixed it.
Demulsifier is made up of oil-soluble demulsifier SP-2 and water-soluble demulsifier the DF-4 compounding of mass ratio 1: 1.
4th, after 30 min, the flocculant aqueous solution that 5L concentration is 80-400 g/L is added into sump oil, stirring mixes it
Uniformly.
Flocculant is inorganic cation flocculant poly aluminium chloride.
5th, the sump oil after processing is subjected to sedimentation separation, realizes oil-water residue three phase separation, reclaim crude oil.
The wherein demulsification of step 2,3,4 to high slag inclusion sump oil plays an important role, and can effectively reduce sump oil
Oil water interfacial tension, reduces viscosity, destroys the emulsification system of sump oil, so that sump oil reaches that breaking emulsion and dewatering takes off the effect of slag, carries
Plateau oil recovery rate.If simple addition demulsifier is extremely limited to the breaking emulsion and dewatering ability of sump oil in step 3, therefore uses step
KMnO in 24First high slag inclusion sump oil is pre-processed, i.e. oxidation to harness emulsion, then add composite emulsion breaker and flocculant, promoted
The three phase separation of oil-water residue, finally realizes that the breaking emulsion and dewatering of sump oil takes off slag.
Specific embodiment：By 1000L sump oils from slop tank is pumped into reactor, it is heated to after 50~90 DEG C, according to step
2nd, 3,4 successively by KMnO4The aqueous solution, demulsifier and flocculant aqueous solution, which are added, to be well mixed in reactor and occurs with sump oil instead
Should, wherein KMnO4：6000g, demulsifier：1000g, flocculant PAC：After 1600g, 2.0 h of reaction, sump oil enters sedimentation separation
In tank after the h of sedimentation separation 3.0, upper strata oil enters crude oil recovery pond, and middle level sewage enters cesspool, and lower floor's grain slag then enters dirt
Mud sump, then grain slag is discharged into after centrifuge dehydration, discharge centrifugation bottom ash, aqueous phase enters cesspool.Sewage in cesspool
Part reuse, part then carries out purified treatment between water treatment vehicle.
Claims (1)
1. a kind of handling process of high slag inclusion sump oil, is heated to 50~90 DEG C by high slag inclusion sump oil, KMnO is mixed into successively4The aqueous solution,
Demulsifier, flocculant aqueous solution, make oil, water, slag three phase separation through sedimentation；The demulsifier is broken by the oil-soluble of mass ratio 1: 1
Emulsion SP-2 and water-soluble demulsifier DF-4 compoundings are made；It is characterized in that the KMnO4KMnO in the aqueous solution4It is dirty with high slag inclusion
The mixing ratio of oil is 2000~10000 mg: 1L；The mixing ratio of the demulsifier and high slag inclusion sump oil is 750~1750 mg:
1L；The mixing ratio of flocculant and high slag inclusion sump oil is 400~2000 mg: 1L in the flocculant aqueous solution；The flocculant is
Inorganic cation flocculant poly aluminium chloride.
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| CN105419855B true CN105419855B (en) | 2017-09-26 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU814392A1 (en) * | 1979-01-16 | 1981-03-23 | Московский Автомобильный Завод Им.И.A.Лихачева | Method of processing waste emulsion cutting fluids |
| CN101565251A (en) * | 2009-05-26 | 2009-10-28 | 北京清大国华环保科技有限公司 | Technique for using composite demulsification-membrane method to treat high-concentration emulsified liquid waste water and device |
| CN102452760A (en) * | 2010-10-19 | 2012-05-16 | 中国石油化工股份有限公司 | Treatment method for recycling oilfield produced water |
| CN103073119A (en) * | 2012-09-14 | 2013-05-01 | 大连格兰清水环境工程有限公司 | Oil-containing emulsion wastewater treatment method and apparatus thereof |
-
2016
- 2016-01-12 CN CN201610016603.XA patent/CN105419855B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU814392A1 (en) * | 1979-01-16 | 1981-03-23 | Московский Автомобильный Завод Им.И.A.Лихачева | Method of processing waste emulsion cutting fluids |
| CN101565251A (en) * | 2009-05-26 | 2009-10-28 | 北京清大国华环保科技有限公司 | Technique for using composite demulsification-membrane method to treat high-concentration emulsified liquid waste water and device |
| CN102452760A (en) * | 2010-10-19 | 2012-05-16 | 中国石油化工股份有限公司 | Treatment method for recycling oilfield produced water |
| CN103073119A (en) * | 2012-09-14 | 2013-05-01 | 大连格兰清水环境工程有限公司 | Oil-containing emulsion wastewater treatment method and apparatus thereof |
Non-Patent Citations (1)
| Title |
|---|
| 破乳絮凝法处理稠油污水;李亚峰等，;《沈阳建筑大学学报（自然科学版）》;20051130;第21卷(第6期);第711-714页 * |
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