CN101444687A - Method for producing oil repellence filter element for filtering oily sewage of oil field - Google Patents
Method for producing oil repellence filter element for filtering oily sewage of oil field Download PDFInfo
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- CN101444687A CN101444687A CNA2008101396049A CN200810139604A CN101444687A CN 101444687 A CN101444687 A CN 101444687A CN A2008101396049 A CNA2008101396049 A CN A2008101396049A CN 200810139604 A CN200810139604 A CN 200810139604A CN 101444687 A CN101444687 A CN 101444687A
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Abstract
The invention relates to a method for producing an oil repellence filter element for filtering oily sewage of oil fields. The method belongs to an improvement of oily sewage disposal device of the oil fields. In the method, polyvinylidene fluoride basal membrane is modified to obtain negative electric charge bearing function, thereby repelling electronegative sump oil and suspended substances in the oily sewage, preventing crude oil from adhering to the filter element, thereby prolonging the service life of the filter element.
Description
Technical field
The present invention relates to a kind of preparation method who scolds oily filter core that oil-contaminated water of oil field filters that is used for, this method belongs to the improvement of treatment device of oily sewage of oil field; This method mainly is to handle by the Kynoar basement membrane being carried out modification, makes it possess bear electric work energy, thus with oil-polluted water in be electronegative sump oil and suspension repels mutually, make crude oil can not be attached on the filter core, and then prolong the service life of filter core.
Background technology
Along with of the exploitation of China's onshore oil field through decades, major part enters high moisture later stage mining phase, average composite water cut has reached more than 80%, there is every year more than 600,000,000 cube oil-polluted water to need to handle, if these oil-polluted waters are directly discharged, not only contaminated environment jeopardizes resident living and water for industrial use safety, and has wasted water resource; If the direct re-injection of these oil-polluted waters is underground, again because of oil-polluted water behind the sudden and violent oxygen in ground, produce series of chemical, produce many suspensions, and can not with the underground water compatibility, very easily cause underground core to stop up, directly influence oil exploitation.Filter is last one oil removing of oil-contaminated water of oil field, the important procedure that removes suspension.
At present, domestic oil field is used for the device that oil-contaminated water of oil field filters and can be divided into following a few class by filter medium and current form: quartz sand filtration device, walnut shell filter device, double-layer filter material filter, fiber ball filtering device, metal membrane filter device etc.The quartz sand filtration device is used the age at most, but there are the following problems: because quartz sand has certain lipophile, growth along with the time, filtrate can occur and pollute, tie phenomenons such as plate, filtering velocity decline and effluent quality variation, the continuous alluvial of suspended solid and mechanical admixture can't be discharged, so quartz sand needs often to change.Walnut shell after the walnut shell filter device employing Screening Treatment is as filtrate, and deoiling effect is better; Because this filtrate density is less, is easy to " fluidisation ", backwash efficient is higher; But it is relatively poor that this device removes the suspended solid effect, and long-play still can adsorb greasy dirt and filtrate occur and harden, and in addition, filtrate can run off in backwash process in a large number.The characteristics of double-layer filter material filter are, what load in the filter is the upper and lower two-layer filtrate of different specific weight, though improved the retaining power of filtrate, still there are phenomenons such as filtrate pollution, loss in this device, and the water quality after handling is difficult to reach less permeable layer injection water quality standard.Advantages such as fiber-ball filter media has wear-resisting, and is corrosion-resistant, and porosity is big, and is renewable, so fiber ball filtering device filtering velocity height, filtering accuracy is higher, and retaining power is stronger, and the work period is longer.But have some weakness when handling oilfield sewage: easily dyed by greasy dirt, backwash and regeneration is inhomogeneous, and is not thorough, and the filtering accuracy instability requires height to raw water quality, and demand is big, equipment investment height, operational administrative inconvenience etc.The filter core that the metal membrane filter device uses metal film to make, this filter core has certain oil resistant contaminative, but under sewage temperature and crude oil effect swelling can take place, and filtering accuracy can't be ensured.In a word, more than the maximum weak point of device (filter core) is that they very easily stick greasy dirt, causes filter opening to stop up, and filters and loses efficacy.
Above filter method does not all reach national oil field reinjection water standard owing to long-term use re-injection water not up to standard, cause water be recycled into underground after can not with the underground water compatibility, cause underground petrosal foramen to stop up, shortened the oil exploitation phase greatly and reduced oil production.Therefore, the fine filtering of oil field re-injection oil-polluted water is a big technical barrier of China's oil field reinjection water.
Summary of the invention
Purpose of the present invention has proposed a kind of preparation method who scolds oily filter core that oil-contaminated water of oil field filters that is used for regard to being to avoid above-mentioned the deficiencies in the prior art part.The major technique characteristics of this method are to be electronegative characteristic according to crude oil, suspension in oil-contaminated water of oil field, and then will make its surface also be elecrtonegativity after the filter core process modification involved in the present invention, because having the identical polar electric charge, the two repels mutually, so crude oil can not be attached on the filter core, and then the service life of prolongation filter core.
Technical characterstic of the present invention is to make the filter membrane with specific function by surface modification, and then makes the filter core of the fine filtering that is fit to oil field re-injection oil-polluted water.Its preparation process comprises following two parts:
1, filter membrane preparation technology: be to adopt ultraviolet light that the polyvinylidene fluoride flat basement membrane is carried out the irradiation grafting modification.Comprise pretreating process, irradiation grafting technology and aftertreatment technology.Detailed process is respectively:
Pretreating process: the Kynoar basement membrane is rinsed well with clear water, initiator solution (acetone is solvent) with 3% (mass fraction) soaks 10h, Kynoar basement membrane after will soaking again takes out, and air dry will cover one deck initator (benzophenone) in its surface after 30 minutes.
Irradiation grafting technology: pretreated Kynoar basement membrane is placed 25cm place under the uviol lamp, and (uviol lamp power is 800W, horizontal positioned), (monomer is the AMPS of polymer grade to the electrical monomer solution of bear of adding 8% (mass fraction), solvent is a water), open uviol lamp and carry out irradiation grafting, exposure time is 30min.
Aftertreatment technology: after the irradiation grafting reaction finishes, clean the polyvinylidene fluoride film surface repeatedly, remove homopolymers and foreign material, thereby make Kynoar bear electrolemma with clear water.
2, filter core is made moulding process: the filter membrane for preparing is made into filter core according to actual requirement of engineering.Specifically be that filter membrane is folded into W shape corrugated, and be shaped into cylindrically, can be made into multilayer and also can be made into individual layer, reinforce with the stainless (steel) wire typing at last.
Description of drawings
The drawing of accompanying drawing is described as follows:
Fig. 1 is the structural representation that the present invention scolds oily filter core.
Fig. 2 is the profile of foldable filter element of the present invention.
Fig. 3 is the oily filter element filtering schematic diagram of scolding of the present invention.
Wherein, the folding filter membrane of 1--filter core fixed seal head 2--internal layer stainless (steel) wire 3--
The outer stainless (steel) wire 5--filter back water out 6--of 4--scolds the import of oily filter core 7--raw water.
The specific embodiment
Come enumeration technical characterstic of the present invention below in conjunction with specific embodiment.
In actual fabrication, the present invention realizes by following operation:
With common polyvinylidene fluoride film is basement membrane, carry out pretreating process, irradiation grafting technology and aftertreatment technology successively by the operation requirement, make common polyvinylidene fluoride film surface attachment one deck have the specific function top layer of bear electrical property, thereby make Kynoar bear electrofiltration film (3).
Then according to illustrated in figures 1 and 2, the filter membrane (3) for preparing is folded into W shape corrugated, can be made into multilayer in the actual fabrication process and also can be made into individual layer, reinforce with internal layer stainless (steel) wire (2) and outer stainless (steel) wire (4) typing, it is cylindrical to use filter core fixed seal head (1) to be shaped at last, thereby is made into filter core (6).
In the actual sewage filter process, as shown in Figure 3: the oil-contaminated water of oil field that needs to handle enters tank body through raw water import (7), will finish filtration by scolding oily filter core (6) under pressure, and the sewage after the filtration treatment is discharged by filter back water out (5).
The invention effect
Because it is the nucleus of filter membrane that the present invention has adopted special engineered macromolecular material, shows by ultraviolet light irradiation Face modification and make the filter membrane with specific function, and then make the filter core of the fine filtering that is fit to oil field re-injection oil-polluted water. Compared with prior art, the present invention has following outstanding characteristics:
1. have that heat resistance, chemical-resistant stability, anti-bacterium corrode and the advantage such as mechanical strength preferably.
2. the filtering accuracy height is filtered rear water and can be reached hyposmosis in the SY5329-94 clastic rock reservoir water water quality fertilizer index Oil field (implanted layer permeability＜0.1 μ m) A1 level injection water quality standard.
The backwash cycle long, favorable regeneration effect is fit to needs of production, has substantially solved low permeability oil field re-injection water Technical barrier.
4. because fixed charge is contained on the filter membrane surface, its separation principle has unique Electrostatic Absorption and repulsive interaction; Filter Film has preferably hydrophily and permeable amount, be suitable for low voltage operated, and resistance tocrocking and selection permeability side Face all has advantage.
Claims (4)
1. one kind is used for the preparation method who scolds oily filter core that oil-contaminated water of oil field filters, this filter core mainly is by modification after filter membrane and filter core fixed seal head that folding forming is arranged in columnar internal layer and the outer stainless (steel) wire constitute, the basement membrane that it is characterized in that filter membrane adopts the polyvinylidene fluoride flat basement membrane, and it is carried out the irradiation grafting modification, make it become Kynoar bear electrolemma; The making of this filter membrane and filter core is to form by following technological operation:
1) preparation of modified filter membranes: adopt ultraviolet light that the polyvinylidene fluoride flat basement membrane is carried out the irradiation grafting modification, this process comprises preliminary treatment, irradiation grafting and post processing three process, and concrete operations are as follows:
Preliminary treatment: the Kynoar basement membrane is rinsed well with clear water, place the benzophenone solution as initator to soak 10 hours, the Kynoar basement membrane after will soaking then takes out, and air dry is after 30 minutes, make its surface coverage one deck initator, i.e. benzophenone;
Irradiation grafting: pretreated Kynoar basement membrane is placed the electrical monomer solution of bear, and place and carry out irradiation grafting under the uviol lamp, exposure time is 30 minutes;
Post processing: after the irradiation grafting reaction finishes, clean the polyvinylidene fluoride film surface repeatedly, remove homopolymers and foreign material, thereby make Kynoar bear electrolemma with clear water;
2) moulding of filter core is made: the modified filter membranes for preparing is made into filter core according to actual requirement of engineering, be about to filter membrane and be folded into W shape corrugated, and be shaped into cylindrical, place the cylindrical shape jacket layer that constitutes by internal layer and outer stainless (steel) wire then, two ends are fixed columned filter membrane top and bottom end seal by fixed seal head, make the foldable filter element of drum type brake.
2. the preparation method who scolds oily filter core who is used for the oil-contaminated water of oil field filtration according to claim 1 is characterized in that initiator solution is the benzophenone solution of mass fraction 3%, and its solvent is an acetone.
3. the preparation method who scolds oily filter core who is used for the oil-contaminated water of oil field filtration according to claim 1 is characterized in that the electrical monomer solution of bear is the monomer polymerization level AMPS aqueous solution of mass fraction 8%.
4. according to claim 1ly be used for the preparation method who scolds oily filter core that oil-contaminated water of oil field filters, the uviol lamp that it is characterized in that being used for irradiation grafting is 800～1000 watts of power, and irradiation distance is 25 centimetres, and requires the placing flat of polyvinylidene fluoride film water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101396049A CN101444687A (en) | 2008-08-28 | 2008-08-28 | Method for producing oil repellence filter element for filtering oily sewage of oil field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008101396049A CN101444687A (en) | 2008-08-28 | 2008-08-28 | Method for producing oil repellence filter element for filtering oily sewage of oil field |
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| CN101444687A true CN101444687A (en) | 2009-06-03 |
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| CNA2008101396049A Pending CN101444687A (en) | 2008-08-28 | 2008-08-28 | Method for producing oil repellence filter element for filtering oily sewage of oil field |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898051A (en) * | 2009-12-30 | 2010-12-01 | 王建民 | Filter |
| CN102190369A (en) * | 2010-08-13 | 2011-09-21 | 深圳市嘉泉膜滤设备有限公司 | Folding membrane bioreactor |
| CN102512994A (en) * | 2011-12-05 | 2012-06-27 | 中国科学院宁波材料技术与工程研究所 | Method for preparing negatively charged membrane through ultraviolet radiation grafting |
| CN109603557A (en) * | 2018-12-25 | 2019-04-12 | 上海福赛特机器人有限公司 | A kind of folded film device and method |
-
2008
- 2008-08-28 CN CNA2008101396049A patent/CN101444687A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898051A (en) * | 2009-12-30 | 2010-12-01 | 王建民 | Filter |
| CN102190369A (en) * | 2010-08-13 | 2011-09-21 | 深圳市嘉泉膜滤设备有限公司 | Folding membrane bioreactor |
| CN102512994A (en) * | 2011-12-05 | 2012-06-27 | 中国科学院宁波材料技术与工程研究所 | Method for preparing negatively charged membrane through ultraviolet radiation grafting |
| CN109603557A (en) * | 2018-12-25 | 2019-04-12 | 上海福赛特机器人有限公司 | A kind of folded film device and method |
| CN109603557B (en) * | 2018-12-25 | 2021-01-12 | 上海福赛特机器人有限公司 | Film folding device and method |
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Application publication date: 20090603 |