CN1740261A - Dirty oil dewatering process for refinery and oil field - Google Patents

Dirty oil dewatering process for refinery and oil field Download PDF

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Publication number
CN1740261A
CN1740261A CN 200510094267 CN200510094267A CN1740261A CN 1740261 A CN1740261 A CN 1740261A CN 200510094267 CN200510094267 CN 200510094267 CN 200510094267 A CN200510094267 A CN 200510094267A CN 1740261 A CN1740261 A CN 1740261A
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ultrasonic
oil
sump oil
dewatering process
process according
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CN 200510094267
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CN100506941C (en
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吕效平
彭飞
叶国祥
韩萍芳
董巍巍
宗松
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Nanjing Tech University
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Nanjing Tech University
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Abstract

The present invention relates to dirty oil dewatering process, and is especially ultrasonic treatment process of dewatering dirty oil in refinery and oil field to recover oil. Water containing dirty oil is first ultrasonic treated in ultrasonic treater with ultrasonic field of standing wave and traveling wave before being oil-water separated in a heat deposition tank, or water containing dirty oil is oil-water separated in a heat deposition tank with standing wave and traveling wave ultrasonic treater. The technological process adopts physical demulsifying process to dewater, has high dirty oil adaptability, no influence of dirty oil property, fast oil-water separation, high dewatering rate, and low operation cost. The present invention is significant in dirty oil recovering and reducing environmental pollution.

Description

Refinery or oilfield sump oil dewatering process
Technical field
The present invention is a kind of dirty oil dewatering process; Relate in particular to the light sump oil in a kind of refinery and the dehydration of heavy sump oil and the ultrasonication novel process of oilfield sump oil dewatering and recovery.
Background technology
Produce certain sump oil in refinery or the oilfield process, wide material sources, nature difference is big.Cut water, subtracted top jar and cut processes such as water, device shut-down pipeline purging, equipment washing, electrofining and produce by petroleum tank, the sump oil complex forms has situations such as oil-in-water, water-in-oil, multilayer coating, and emulsification is serious, has extremely strong oil water interfacial tension.Oil field and refinery sump oil often contain various auxiliary agents and colloid, bituminous matter, and solid particulate, are difficult for breaking emulsion and dewatering.In the actual production process of refinery, lightweight sump oil and heavy sump oil all contain than juicy, generally about 10%~80%.
The ordinary method of sump oil breaking emulsion and dewatering has the heat sink emulsion splitter etc. that falls, adds.Usually sump oil heat sinkly falls the requirement that still is difficult for reaching recycling through the long period.A large amount of moisture and impurity make these sump oils both be difficult to recycle, and have taken a large amount of flask volume again; Owing to all contain a large amount of various auxiliary agents and other chemical substance usually in the sump oil, in the breakdown of emulsion process, add emulsion splitter, its consumption is big and demulsification is not obvious.
Because the singularity and the complicacy of sump oil, conventional breaking method all shows limitation, makes a large amount of sump oils to recycle, and causes the wasting of resources, contaminate environment.Domestic relevant patent has the utility model patent of CN2296230Y in November, 1998 at the crude oil demulsification desalting and dewatering, is made up of electric desalting device, ultrasonic wave zone of action, ultrasonic probe etc.Its ultrasonic probe installation direction is vertical with the zone of action axis direction, makes the ultrasonic wave action direction vertical with the crude oil flow direction.Make crude oil be subjected to the residence time of ultrasound wave irradiation short, causing easily that ultrasonic local emulsification makes takes off back water content in crude oil height, influences the operation of desalination fractionation column.In March, 2003, the utility model patent of CN2539559Y improved above-mentioned patent, was made as consistent with the crude oil flow direction ultrasonic wave effect axis direction.Its ultrasonic wave zone of action is the duct type structure, and the ultrasonic wave zone of action the other end is the Taper Pipe district, makes reflection wave that hyperacoustic plane of reflection forms can or not assemble and make emulsification of crude oil because of stack, and uniform ultrasonic wave zone of action is provided.The Chinese patent CN2669953Y in January, 2005 has carried out once more improving to patent CN2539559Y, proposes the pipeline both sides ultrasonic probe is set simultaneously, to prolong the action time of ultrasonic wave to emulsion.Though above patent has certain effect to Desalting and Dewatering from Crude Oil, all acoustics requirements of not mentioned ultrasonic processing apparatus, ultrasonic utilization ratio is lower, and the crude oil residence time is longer, does not relate to the application of all kinds of sump oil breaking emulsion and dewaterings aspect.
Summary of the invention
Purpose of the present invention is difficult to moisture a large amount of in the sump oil of place to go and impurity in order to solve above-mentioned technology, sump oil is difficult to recycle, and causes problem such as environmental pollution and has proposed a kind of moisture sump oil to be entered the technology that hot slurry tank with ultrasound functions carries out oily water separation through entering heat sink jar settlement separate or moisture sump oil that falls after the ultrasonication.
The technical solution adopted in the present invention is: make the water droplet coalescence in the sump oil and realize oily water separation by hyperacoustic capable ripple or standing wave effect, at the clear and definite dehydration treatment method and the industrial realization mode of high aquosity proposition of sump oil.Concrete technical scheme is: a kind of refinery or oilfield sump oil dewatering process, it is characterized in that entering heat sink falling behind the ultrasonic treatment unit of moisture sump oil through having standing wave or row ripple jar carries out oily water separation, or moisture sump oil enters the hot slurry tank with standing wave or traveling-wave ultrasonic device and carries out oily water separation.
Wherein above-mentioned ultrasonic treatment unit comprises ultrasonic generator, ultrasonic transducer; Ultrasonic treatment unit is box, circular pipe type or pot type; Ultrasonic transducer is piezoelectric ceramic ultrasound transverter or ultrasonic magnetostrictive transverter, and ultrasonic transducer is single or multiple arrays.
Wherein, moisture sump oil was through ultrasonication 2~30 minutes, and ultrasonic frequency is 5kHz~100kHz; The uniprocessing that moisture sump oil can be made up of one group of ultrasonic device and hot slurry tank also can be adopted secondary or multiple-stage treatment.
Major equipment required for the present invention comprises ultrasonic treatment unit (box, pot type or circular pipe type) and hot slurry tank.Ultrasonic generator produces electrical signal of the frequency and delivers to transverter through lead, and transverter converts electric energy to acoustic energy and sends into ultrasonic treatment unit.
Point of the present invention comprises operational path and ultrasonic emulsion breaking equipment.Sump oil breaking emulsion and dewatering operational path rationally reaches the key that the ultrasonic emulsion breaking equipment design correctly is present technique invention successful implementation, require that sound field is traveling-wave field or stationary field in the treater, the acoustic processing device design, add man-hour in strict accordance with the acoustics requirement and select the optimum sound frequency for use.
Hot slurry tank with ultrasound functions is to be equipped with ultrasonic transducer on the hot slurry tank, directly the jar inner fluid is carried out ultrasound wave irradiation.Usually ultra-sonic generator is designed to interval type or pulse operation mode, is beneficial to deposition dehydrating; Generally ultrasonic transducer is placed pot bottom, make sound wave radiation straight up, by liquid-gas interface ultrasonic reflections is returned and form row ripple or standing wave in the liquid; If transverter is placed a jar side, then need usually to arrange in pairs, be beneficial to form capable ripple or standing wave effect sound field.
The present technique characteristics are that moisture sump oil enters ultrasonic treatment unit after the preheating, and it is settlement separate to enter the heat sink jar that falls after 2~30 minutes by the processing requirement ultrasonication.According to the difference that sump oil is formed, moisture sump oil layering difference in slurry tank, so can adopt different post-treating methods:
1. lighter moisture sump oil is through supersound process standing demix again.Generally be divided into two-layer.The upper strata is an oil reservoir, and lower floor is a sewage.The oil reservoir water content generally is lower than 10%, can send the atmospheric and vacuum distillation unit freshening, and sewage send sewage work.
2. moisture heavy sump oil (containing less impurity and solid particulate) is through supersound process standing demix again.Generally also be divided into two-layer.The upper strata is an oil reservoir, and lower floor is a sewage.The oil reservoir water content generally is lower than 10%, can send normal decompression freshening or coker, and sewage send sewage work.
3. moisture heavy sump oil (containing more impurity and solid particulate) is through supersound process standing demix again.Generally may be divided into three layers, the upper strata is the light oil layer, and water content is extremely low, can directly send diesel oil processing workshop section or send the atmospheric and vacuum distillation unit freshening as distillate; The middle level oil reservoir water content of attaching most importance to is lower, but this layer contains more colloid, bituminous matter, solid particulate etc., can send coker to handle; Lower floor's sewage send sewage work.
4. if said process is oilfield sump oil dehydration, then dehydration back sump oil can with dehydration back crude oil combination treatment or individual curing.
The used ultrasonic frequency of the present invention is 5kHz~100kHz, in 2~30 minutes treatment times, all should become according to sump oil character; Sound power becomes according to treatment capacity is different.Ultrasonic wave forms the row ripple in the zone of action or standing wave is that present technique is used (obtaining best dehydrating effect) key.
Dirty oil dewatering novel process of the present invention is the ultrasonic dehydration dewatering process.The scope of application comprises the removal process of refinery's dirty oil dewatering recovery, oilfield sump oil dewatering and recovery and other moisture sump oils etc.
Beneficial effect:
1. utilize hyperacoustic cavitation effect to overcome oil water interfacial tension and hyperacoustic agglomeration effect makes the dispersed phase drop coalescence, finally realize oily water separation by sedimentation.
2. adopt the ultrasonic dehydration dehydration technique to belong to physics breaking emulsion and dewatering method, be subjected to the influence of oil property little, to dirty oil dewatering have that adaptability is strong, dehydration rapidly and characteristics such as effect is obvious.
3. go ripple or standing-wave sound field moisture sump oil is handled, the aggregation force of sound wave makes in the sump oil water droplet coalescence become big, can realize oily water separation at short notice, heat sink fall time and the raising of final dewatering rate have been shortened, ultrasonic wave is short action time, can deviate from most of water rapidly under the ultrasonic wave effect of several minutes.For the moisture heavy sump oil of height, after the employing present technique, first treated can be deviate from the moisture content more than 50%, adopts repeatedly circular treatment can reach high requirement.
4. after adopting this technology, the processing power of sump oil slurry tank is improved, dehydration back sump oil is freshening directly, has improved the utility value of sump oil, has higher economic value.After dirty oil dewatering reclaims simultaneously, pollute, protect environment significant to reducing.
1. description of drawings
Fig. 1 is the second-stage treatment schematic flow sheet of present technique invention.
Fig. 2, Fig. 3 partly are the structural representation of box treater for ultrasonication of the present invention, and wherein Fig. 2 is a front view, and Fig. 3 is a vertical view.Ultrasound transducer array can place the one-sided or bilateral of box treater.
Fig. 4, Fig. 5 partly are the structural representation of circular pipe type treater for ultrasonication of the present invention, and wherein Fig. 4 is a front view, and Fig. 5 is a side-view.
Fig. 6, Fig. 7 partly are the pot type structural representation for ultrasonication of the present invention, i.e. ultrasonic wave effect jar also is hot slurry tank simultaneously, and interval type is adopted in operation, and wherein Fig. 6 is a front view, and Fig. 7 is the sectional view of A-A direction.
1,4 is the ultrasonic wave agency part among the figure, and 2,5 is hot slurry tank; 3,6 is visor, V-1, V-2 ..., V-12 is valve, 7 is the sump oil inlet, 8 is sump oil outlet after the ultrasonication, and 9 be ultrasonic wave single head transverter or transducer array, 10 sewage draining exits during for cleaning, 11 dehydration back sump oil outlets, 12 for deviating from sewage outlet, and 13 is stirring rake.
Be the uniprocessing flow process in Fig. 1 frame of broken lines, the present invention can adopt single-stage, secondary in addition more the multiple-stage treatment mode to reach the purpose that sump oil is recycled.Sump oil enters the deposition dehydrating jar through valve V-2 again by the laggard excess of imports acoustic wave action of valve V-1 district, and oil, water stratification in the deposition dehydrating jar are determined regularly effluent sewerage and oil respectively by visor.
The electrical signal of the certain frequency that ultrasonic generator produces is delivered to ultrasonic transducer (single or array) through lead, and transverter is radiated to the sump oil zone of action with acoustical signal.
2. specific embodiment
Embodiment 1
Ultrasonic frequency 28kHz.Initial water content is heavy sump oil employing the technology of the present invention (the ultrasonic wave agency part adopts the treatment unit of Fig. 2, Fig. 3) of about 75%, through the ultrasonic wave direct action after 5 minutes, sedimentation is after 4 hours to deliver to hot slurry tank (80 ℃ of temperature), and profit separates rapidly, and it is 3 layers that profit is divided into.Take off the average water-content of back light oil layer and be lower than 1%, can directly send refining or freshening as distillate; Oil reservoir bottom heavy oil starches moisture about 45%.
Embodiment 2
For embodiment 1 dehydration back sump oil (comprising top light oil layer and bottom heavy oil), carry out carrying out ultrasonic wave (frequency 28kHz) effect 3 minutes once more after the preheating, through the long-time heat sink back (85 ℃ of temperature) that falls of hot slurry tank, the total water content of oil reservoir is lower than 28%.According to the sump oil way of recycling, direct freshening or continue repeatedly dehydration cycle and handle to reach the purpose of recycling.
Embodiment 3
Ultrasonic frequency 40kHz.Initial water content is heavy sump oil employing the technology of the present invention (the ultrasonic wave agency part adopts the treatment unit of Fig. 2, Fig. 3) of about 75%, through the ultrasonic wave direct action after 10 minutes, deliver to hot slurry tank (70 ℃ of temperature) sedimentation after 4 hours, profit separates rapidly, lower floor's sewage accounts for 51%, it is about 49% that sump oil takes off the back water-content, and the sump oil volume reduces half.
Embodiment 4
Ultrasonic frequency 28kHz.Initial water content is heavy sump oil employing the technology of the present invention (the ultrasonic wave agency part adopts the treatment unit of Fig. 2, Fig. 3) of about 75%, and after 3 minutes, sedimentation is after 2 hours to deliver to hot slurry tank (80 ℃ of temperature) through the ultrasonic wave direct action, and profit separates rapidly.After lower layer of water separated, oil reservoir is carried out ultrasonic wave effect once more 4 minutes, carry out long-time heat sink falling (80 ℃ of temperature are more than 6 hours) at last, water-content is lower than 35% after the profit layering.

Claims (7)

1, a kind of refinery or oilfield sump oil dewatering process, it is characterized in that entering heat sink falling behind the ultrasonic treatment unit of moisture sump oil through having standing wave or row ripple jar carries out oily water separation, or moisture sump oil enters the hot slurry tank with standing wave or traveling-wave ultrasonic device and carries out oily water separation.
2, dewatering process according to claim 1 is characterized in that ultrasonic treatment unit comprises ultrasonic generator and ultrasonic transducer.
3, dewatering process according to claim 2 is characterized in that ultrasonic treatment unit is box, circular pipe type or pot type.
4, dewatering process according to claim 2 is characterized in that ultrasonic transducer is piezoelectric ceramic ultrasound transverter or ultrasonic magnetostrictive transverter.
5, dewatering process according to claim 2 is characterized in that ultrasonic transducer is single or multiple arrays.
6, dewatering process according to claim 1 is characterized in that moisture sump oil through ultrasonication 2~30min, and ultrasonic frequency is 5kHz~100kHz.
7, dewatering process according to claim 1 is characterized in that moisture sump oil adopts the uniprocessing of being made up of one group of ultrasonic device and hot slurry tank, perhaps adopts secondary or multiple-stage treatment.
CNB2005100942672A 2005-09-07 2005-09-07 Dirty oil dewatering process for refinery and oil field Expired - Fee Related CN100506941C (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102051201A (en) * 2009-10-27 2011-05-11 中国石油化工股份有限公司 Method and device for performing emulsion breaking on oil-water emulsion by ultrasonic wave
CN102091439A (en) * 2010-12-27 2011-06-15 重庆工商大学 Emulsified oil water hammer harmonic wave demulsification principle and device
CN102226099A (en) * 2011-04-12 2011-10-26 大庆油田有限责任公司 Device for recovery and treatment of dirty oil generated in sewage treatment station system and treatment process thereof
CN102260512A (en) * 2011-06-22 2011-11-30 华东理工大学 Application of ultrasound in biomass tar dehydration
CN109276914A (en) * 2018-11-29 2019-01-29 天津市瑞德赛恩新材料开发有限公司 A kind of aqueous sump oil processing method of superelevation
CN111252970A (en) * 2020-02-13 2020-06-09 湛江远通高新技术有限公司 Oil-water separation method for oily sewage of ship
WO2020238163A1 (en) * 2019-05-31 2020-12-03 青岛贝索科技有限公司 Method and apparatus for preventing sludge sedimentation in electro-desalting drum by means of ultrasonic waves
WO2020238161A1 (en) * 2019-05-31 2020-12-03 青岛贝索科技有限公司 Method and device for ultrasonically treating slop oil by sulfur-containing wastewater

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6055859A (en) * 1996-10-01 2000-05-02 Agency Of Industrial Science And Technology Non-contact micromanipulation method and apparatus
US5951456A (en) * 1997-05-16 1999-09-14 Scott; Harold W. Ultrasonic methods and apparatus for separating materials in a fluid mixture
CN2296230Y (en) * 1997-09-09 1998-11-04 耿连瑞 Ultrasonic emulsion breaking device for raw oil electric field dehydration
US6770248B2 (en) * 2001-05-04 2004-08-03 Her Majesty The Queen In Right Of Canada, As Represented By The Minister Of National Defence Of Her Majesty's Canadian Government Flowthrough device for the ultrasonic destruction of microorganisms in fluids
CN2539559Y (en) * 2002-03-28 2003-03-12 中国石化集团齐鲁石油化工公司 Crude oil ultrasonic wave-electric field combined desalination device
CN1245231C (en) * 2003-08-27 2006-03-15 中国石油化工股份有限公司 Method and device for breaking oil water emulsion using combined action of forward current and countercurrent flow ultrasonic wave
CN2669953Y (en) * 2003-09-05 2005-01-12 中国石油化工股份有限公司 Demulsifying devices for oil and water emulsified materials
CN2721201Y (en) * 2004-08-27 2005-08-31 重庆渝能滤油机制造有限公司 Ultrasonic vacuum separator of vacuum oil filter

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102051201A (en) * 2009-10-27 2011-05-11 中国石油化工股份有限公司 Method and device for performing emulsion breaking on oil-water emulsion by ultrasonic wave
CN102091439A (en) * 2010-12-27 2011-06-15 重庆工商大学 Emulsified oil water hammer harmonic wave demulsification principle and device
CN102091439B (en) * 2010-12-27 2013-03-20 重庆工商大学 Emulsified oil water hammer harmonic wave demulsification device
CN102226099A (en) * 2011-04-12 2011-10-26 大庆油田有限责任公司 Device for recovery and treatment of dirty oil generated in sewage treatment station system and treatment process thereof
CN102226099B (en) * 2011-04-12 2013-10-23 大庆油田有限责任公司 Process for recovery and treatment of dirty oil generated in sewage treatment station system
CN102260512A (en) * 2011-06-22 2011-11-30 华东理工大学 Application of ultrasound in biomass tar dehydration
CN109276914A (en) * 2018-11-29 2019-01-29 天津市瑞德赛恩新材料开发有限公司 A kind of aqueous sump oil processing method of superelevation
WO2020238163A1 (en) * 2019-05-31 2020-12-03 青岛贝索科技有限公司 Method and apparatus for preventing sludge sedimentation in electro-desalting drum by means of ultrasonic waves
WO2020238161A1 (en) * 2019-05-31 2020-12-03 青岛贝索科技有限公司 Method and device for ultrasonically treating slop oil by sulfur-containing wastewater
CN111252970A (en) * 2020-02-13 2020-06-09 湛江远通高新技术有限公司 Oil-water separation method for oily sewage of ship

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