CN106315932A - Method for disposing wastewater from oil field - Google Patents
Method for disposing wastewater from oil field Download PDFInfo
- Publication number
- CN106315932A CN106315932A CN201610712531.2A CN201610712531A CN106315932A CN 106315932 A CN106315932 A CN 106315932A CN 201610712531 A CN201610712531 A CN 201610712531A CN 106315932 A CN106315932 A CN 106315932A
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- Prior art keywords
- oil
- water
- oil field
- waste water
- ceramic membrane
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/463—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrocoagulation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a method for disposing wastewater from oil field, comprising the following steps: step 1, removing oil through electro-coagulation system; step 2, separating oil and water through air-floating Integral system; step 3, clarifying to remove impurities through ceramic membrane system; step 4, reverse osmosis desalination system for recovering. The method for disposing wastewater from oil field has the advantages of environmental protection, reduced energy consumption, reduced cost, resources recycling and easy operation, etc.
Description
Technical field
The present invention relates to field of waste water treatment, particularly to a kind of oil field wastewater treatment method.
Background technology
Oil field waste is other type of in mainly including crude oil abjection water (having another name called oil production waste water in oil field), well-drilling waste water and station
Oily waste water.The process of oil field waste can have various ways according to factors such as oil field production, environment.When oil field needs water filling
Time, oil field waste reinjection into reservoir after treatment, now the many indexes such as the float in water, oil are strictly controlled, anti-
Only it produces injury to stratum.
Oil extraction waste water, also known as oil field extracted water, is oil field formation water with crude oil together extraction during recovering the oil.By
Different in stratum, oil recovery process is different, and therefore the composition of recovered water is sufficiently complex, typically can not directly discharge or re-injection.Oil field
Containing crude oil, various salt, Organic substance, inorganic matter and microorganism etc. in recovered water.Oil-containing about 1000～2000mg/L, high can
Reaching more than 5000mg/L, existence form is divided into oil slick, dispersed oil, oil emulsion and dissolved oil according to the granular size of oil.In water
Saliferous is the most thousand of to several ten thousand even tens0000 mg/L, and inorganic ion mainly has Ca2+、Mg2+、K+、Na+、Fe2+、Cl-、HC03 -Deng；
The Organic substance contained has aliphatic hydrocarbon, aromatic hydrocarbon, phenols, organic sulfur compound, fatty acid, surfactant, polymer etc..Inorganic matter
Mainly there is dissolving H2S, FeS granule, clay particle, flour sand and fine sand etc..Microorganism in oil field extracted water mainly has sulfate
Reducing bacteria, saprophytic bacteria and iron bacteria etc..
At present, the mid-term of oneself entrance oil development of most of China oil field and later stage, it is very big that formation pressure declines degree, its
It is used to maintain the important means of formation pressure by water flood recovery.The Water in oil amount of extraction is generally 70%～80%, has
Oil field be even as high as 90%, thus resulting in the discharge capacity containing waste water of recovering the oil very big, if the most treated direct discharge, not only
The pollution at soil, water source can be caused, even can cause sump oil fire incident.Whereas if oil extraction waste water is processed, it is used for
Re-injection oil field, the most not only can meet the requirement that in oil extraction process, water injection rate is growing, can also save water resource simultaneously,
Reduce the sustainable development of environmental pollution, beneficially oil field, improve the economic benefit in oil field.
At present, the oil-extracting waste water treatment process that oil field is commonly used is: natural oil removing coagulation oil removing pressure removes
Oil three sections processes technique, then is aided with the method process such as other biochemistry.This " old three sets " are though process has certain effect, but locate
A lot of problem is there is after reason.
Summary of the invention
For the problems referred to above, it is an object of the invention to provide one and there is environmental protection, reduce energy consumption, reduction cost,
And the oil field wastewater treatment method of petroleum wastewater reuse can be realized.
For reaching above-mentioned technical purpose, the technical scheme that the present invention proposes is: a kind of oil field wastewater treatment method, including such as
Lower step:
Step 1 electricity flocculation system oil removing: oil field waste is transported to electricity flocculation system, the tiny flocculation produced by electrode
Agent, removes the petroleum substance in waste water；
Step 2 air supporting integrated system oil-water separation: the waste water after electricity flocculation treatment is by entering after alkali regulation pH to 10-11
Air supporting integrated system carries out oil-water separation, and removes the calcium ions and magnesium ions in water by adding sodium carbonate and PAC, reduces the hard of waste water
Degree；Obtaining supernatant and bed mud, bed mud obtains filtrate by plate-and-frame filtration；
Step 3 ceramic membrane system clarification remove impurity: by air supporting integrated system supernatant and bed mud through the filtrate of plate-and-frame filtration
Acid adding adjusts pH to after neutrality, enters ceramic membrane system together, removes trace petroleum substance and the float of residual in waste water,
Ceramic membrane dialysis solution and ceramic membrane concentrated solution；
Step 4 reverse osmosis deaslination reclaiming system: ceramic membrane dialysis solution is removed in waste water most by counter-infiltration system
Inorganic salt and small-molecule substance, obtain reverse osmosis concentrated liquid and reverse osmosis dialysis solution, and reverse osmosis dialysis solution is back to oil extraction in oil field system
In system.
Preferably, built-in 1 oil-water separation tank of described air supporting integrated system, 2 dosing tanks and 1 inclined plate sedimentation groove；
The described waste water after electric flocculation treatment first passes through separating tank and carries out oil-water separation, removes oil slick by scraper plate, subsequently into adding
Drug slot, reduces waste water hardness by adding sodium carbonate and PAC, finally enters inclined plate sedimentation groove isolated supernatant, and bed mud leads to
During after crossing filter press, filtrate is collected in the former water pot of ceramic membrane together with supernatant.
Preferably, the feature of the ceramic membrane that described ceramic membrane system is used is Alumina Inorganic Membrane, its pore size filter
For 200nm, working condition be temperature at 20～45 DEG C, operating pressure 2.0～4.0bar.
Preferably, the feature of the reverse osmosis membrane that described counter-infiltration system is used is polysulfones, polyether sulfone, composite nanometer filter
Film, its working condition be temperature at 20～35 DEG C, operating pressure 2.0～4.0Mpa.
Preferably, also include that ceramic membrane concentrated solution is back to electricity flocculation system carries out the step of oil removing.
In sum, oil field wastewater treatment method of the present invention have environmental protection, reduce energy consumption, reduce cost,
The advantages such as resource recycling and simplification operation, specific as follows:
1) by electricity flocculation system and air supporting integrated system combined process, the oil slick in oil field waste is effectively eliminated, and
And the hardness in waste water is reduced by dosing；
2) by ceramic membrane system, waste water is processed, on the one hand can remove the microfiltration petroleum substance of waste water residual
And float, on the other hand waste water is carried out clarifying treatment, and ceramic membrane system contamination resistance is strong, therefore its filter process energy
Enough holding, stablizes；
3) by reverse osmosis membrane system, waste water being carried out desalination, its operating cost is low, and salt rejection rate is high, can be greatly reduced useless
Salt content in water, it is ensured that produce water quality so that produce water and can be back in oil extraction system.
Accompanying drawing explanation
Fig. 1 is oil field wastewater treatment method schematic flow sheet of the present invention.
Detailed description of the invention
Technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described enforcement
Example is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, this area is common
All other embodiments that technical staff is obtained under not making creative premise, broadly fall into the scope of protection of the invention.
The basic process of oil field wastewater treatment method of the present invention is: first by oil extraction waste water through electricity flocculation system,
Making the petroleum substance flocculation in waste water agglomerating, then waste water enters air supporting integrated system, carries out oil-water separation, then by adding
Waste water hardness is reduced by medicine, obtains supernatant and bed mud, and bed mud obtains filtrate, air supporting integrated system supernatant and sheet frame through plate-and-frame filtration
Filtrate collection, in the former water pot of ceramic membrane, is filtered by ceramic membrane system, removes float therein and trace petroleum substance,
Ceramic membrane dialysis solution enters counter-infiltration system and carries out desalination so that reverse osmosis dialysis solution is back in oil extraction system.
Specific operation process is as follows:
Step 1 electricity flocculation deoiling
Oil field waste enter electricity flocculation system, use aluminium sheet as positive plate, be passed through unidirectional current, by electrode produce micro-
Flocculant, makes the petroleum substance flocculation in waste water agglomerating, thus removes the petroleum substance in waste water；
The principle of electricity flocculation system oil removing is: oil field waste is transported to electricity flocculation system, the electrolysis oxygen flocculated by electricity
Change effect, electroreduction effect, electrofloatation effect and electrolytic flocculation effect, by the such as hydrion of the cation in waste water in electrolysis
Obtain electronics near in groove and be reduced into hydrogen；Other metal ions in waste water owing to having its activity in water, still with
Ionic state exists.And waste water has the anion such as Cl of electrolysis betatopic activity-、OH-Electricity is lost near electrolysis bath inner anode
Son is oxidized to Cl2、O2, the chlorine of generation is dissolved in water and forms ClO-, substantial amounts of ClO-The sterilizing to sewage with strength is made
With, the antibacterial in water is removed with this.Simultaneously because anode and cathode generates substantial amounts of hydrogen and oxygen, its bubble is little, and dispersion is high, makees
Float for carrier adheres to the light oil in water and float, reach the effect of oil removing；
Parameter in electricity flocculation system running is as follows:
| Batch | Flow of inlet water (L/h) | Electric current | Voltage |
| 1 | 350-400 | 10.6-11 | 27-28 |
| 2 | 360-390 | 11 | 27 |
| 3 | 350-390 | 11 | 27 |
Step 2 air supporting integrated system oil removing
Electricity flocculation water outlet enters air supporting integrated system, reduces hardness, to last swash plate by oil-water separation tank, dosing tank
Subsider so that in final water outlet, oil content and hardness all ratios are relatively low；This system major parameter is the dosing of sodium carbonate and PAC
Amount, specific as follows:
Step 3 ceramic membrane system
Handled waste water is air supporting integrated system water outlet and sheet frame filtrate regulation pH to the waste water after neutrality, uses pore size filter
For 200nm ceramic membrane filter, filtration temperature 30 DEG C, pressure 3bar；Carrying out practically parameter such as following table:
Can be seen that employing this waste water of ceramic membrane filter has the rate of filtration from experimental data fast, producing water ratio advantages of higher,
Can ensure that the continuous operation of system.
Step 4 reverse osmosis membrane system desalination reuse
Handled waste water is ceramic membrane dialysis solution, and temperature controls at 20-30 DEG C, pressure 3Mpa, has carried out 3 batches altogether real
Test, concrete outcome such as table 3: the reverse osmosis deaslination technology that the inventive method is used can remove in waste water the inorganic of the overwhelming majority
Salt so that produce water and can be back in oil extraction system.This system has easy and simple to handle, and salt rejection rate is high, the advantages such as operating cost is low,
And the stable operation of system is disclosure satisfy that subsequently through cleaning and regeneration.
Through above-mentioned each batch each process section effluent quality
1st batch
2nd batch
3rd batch
Claims (5)
1. an oil field wastewater treatment method, it is characterised in that comprise the steps:
Step 1 electricity flocculation system oil removing: oil field waste is transported to electricity flocculation system, the tiny flocculation agent produced by electrode, goes
Except the petroleum substance in waste water；
Step 2 air supporting integrated system oil-water separation: the waste water after electricity flocculation treatment is by entering air supporting after alkali regulation pH to 10-11
Integrated system carries out oil-water separation, and removes the calcium ions and magnesium ions in water by adding sodium carbonate and PAC, reduces useless hardness of water；
Obtaining supernatant and bed mud, bed mud obtains filtrate by plate-and-frame filtration；
Step 3 ceramic membrane system clarification remove impurity: by air supporting integrated system supernatant and bed mud through the filtrate acid adding of plate-and-frame filtration
Adjust pH to after neutrality, enter ceramic membrane system together, remove trace petroleum substance and the float of residual in waste water, obtain ceramic
Film dialysis solution and ceramic membrane concentrated solution；
Step 4 reverse osmosis deaslination reclaiming system: ceramic membrane dialysis solution is removed in waste water most inorganic by counter-infiltration system
Salt and small-molecule substance, obtain reverse osmosis concentrated liquid and reverse osmosis dialysis solution, and reverse osmosis dialysis solution is back in oil extraction in oil field system.
A kind of oil field wastewater treatment method the most according to claim 1, it is characterised in that in described air supporting integrated system
Put 1 oil-water separation tank, 2 dosing tanks and 1 inclined plate sedimentation groove；The described waste water after electric flocculation treatment first passes through separating tank
Carry out oil-water separation, remove oil slick by scraper plate, subsequently into dosing tank, reduce waste water hardness by adding sodium carbonate and PAC,
Finally entering inclined plate sedimentation groove isolated supernatant, bed mud is collected in pottery by filtrate after filter press together with supernatant
In the former water pot of film.
A kind of oil field wastewater treatment method the most according to claim 1, it is characterised in that described ceramic membrane system is adopted
The feature of ceramic membrane be Alumina Inorganic Membrane, its pore size filter is 200nm, working condition be temperature at 20～45 DEG C, work
Make pressure 2.0～4.0 bar.
A kind of oil field wastewater treatment method the most according to claim 1, it is characterised in that described counter-infiltration system is adopted
The feature of reverse osmosis membrane be polysulfones, polyether sulfone, composite nanometer filtering film, its working condition be temperature at 20～35 DEG C, work pressure
Power 2.0～4.0 Mpa.
A kind of oil field wastewater treatment method the most according to claim 1, it is characterised in that also include ceramic membrane concentrated solution
It is back to electricity flocculation system and carries out the step of oil removing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610712531.2A CN106315932A (en) | 2016-08-24 | 2016-08-24 | Method for disposing wastewater from oil field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610712531.2A CN106315932A (en) | 2016-08-24 | 2016-08-24 | Method for disposing wastewater from oil field |
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| CN106315932A true CN106315932A (en) | 2017-01-11 |
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| CN201610712531.2A Pending CN106315932A (en) | 2016-08-24 | 2016-08-24 | Method for disposing wastewater from oil field |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106630316A (en) * | 2017-01-17 | 2017-05-10 | 沈阳建筑大学 | Integrated multiphase-flow treatment device for oil-containing sewage and sewage treatment method |
| CN106977007A (en) * | 2017-03-29 | 2017-07-25 | 中国石油大学(华东) | The system and method for bi-membrane method advanced treating brown alga chemical industry waste Ca water |
| CN107352704A (en) * | 2017-08-18 | 2017-11-17 | 沈瑞忠 | A kind of printing ink wastewater recycling device |
| CN107459174A (en) * | 2017-09-18 | 2017-12-12 | 广东普施德泽环保股份有限公司 | A kind of food and drink waste water recycle device |
| CN110092515A (en) * | 2019-05-14 | 2019-08-06 | 黑龙江大学 | The micro-nano air bearing of electric flocculation-- ceramics film process oily waste water system and its processing method |
| CN110642435A (en) * | 2019-09-27 | 2020-01-03 | 北京帝力伟业科技开发有限公司 | Clean treatment system and method for ASP flooding oil extraction wastewater |
| CN112759146A (en) * | 2019-10-21 | 2021-05-07 | 中国石油天然气集团有限公司 | Method and device for enhanced demulsification and oil removal of crude oil electric desalting wastewater |
| CN115477420A (en) * | 2021-05-31 | 2022-12-16 | 中国石油化工股份有限公司 | Polymer-containing oil field wastewater treatment method and treatment device |
| CN116177582A (en) * | 2021-11-29 | 2023-05-30 | 长庆工程设计有限公司 | Method for preparing superfine calcium carbonate by utilizing treatment process of oilfield operation waste liquid |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106630316A (en) * | 2017-01-17 | 2017-05-10 | 沈阳建筑大学 | Integrated multiphase-flow treatment device for oil-containing sewage and sewage treatment method |
| CN106977007A (en) * | 2017-03-29 | 2017-07-25 | 中国石油大学(华东) | The system and method for bi-membrane method advanced treating brown alga chemical industry waste Ca water |
| CN107352704A (en) * | 2017-08-18 | 2017-11-17 | 沈瑞忠 | A kind of printing ink wastewater recycling device |
| CN107459174A (en) * | 2017-09-18 | 2017-12-12 | 广东普施德泽环保股份有限公司 | A kind of food and drink waste water recycle device |
| CN110092515A (en) * | 2019-05-14 | 2019-08-06 | 黑龙江大学 | The micro-nano air bearing of electric flocculation-- ceramics film process oily waste water system and its processing method |
| CN110642435A (en) * | 2019-09-27 | 2020-01-03 | 北京帝力伟业科技开发有限公司 | Clean treatment system and method for ASP flooding oil extraction wastewater |
| CN112759146A (en) * | 2019-10-21 | 2021-05-07 | 中国石油天然气集团有限公司 | Method and device for enhanced demulsification and oil removal of crude oil electric desalting wastewater |
| CN115477420A (en) * | 2021-05-31 | 2022-12-16 | 中国石油化工股份有限公司 | Polymer-containing oil field wastewater treatment method and treatment device |
| CN115477420B (en) * | 2021-05-31 | 2024-02-13 | 中国石油化工股份有限公司 | Polymer-containing oilfield wastewater treatment method and treatment device |
| CN116177582A (en) * | 2021-11-29 | 2023-05-30 | 长庆工程设计有限公司 | Method for preparing superfine calcium carbonate by utilizing treatment process of oilfield operation waste liquid |
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Application publication date: 20170111 |