CN1386824A - Electric dewatering apparatus for crude oil - Google Patents
Electric dewatering apparatus for crude oil Download PDFInfo
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- CN1386824A CN1386824A CN 02115875 CN02115875A CN1386824A CN 1386824 A CN1386824 A CN 1386824A CN 02115875 CN02115875 CN 02115875 CN 02115875 A CN02115875 A CN 02115875A CN 1386824 A CN1386824 A CN 1386824A
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- crude oil
- electrode
- dewatering apparatus
- electric
- electric dewatering
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Abstract
An electric dewatering device for pretreating high-water crude oil in oil field is characterized by use of semiconductor electrode or the metal electrode coated with semiconductor layer for preventing the over-current caused by the high electric conductivity of crude oil due to high water content and the over-drop of voltage. Its advantages are high effect on removing water and salt, and saving electric energy by 50%.
Description
Technical field
The present invention relates to a kind of electric dewatering apparatus for crude oil, be adapted to desalination, the dehydration operation of crude oil dehydration and refinery crude oil.
Background technology
In the prior art, electric dewatering apparatus for crude oil comprises tank body and is arranged at a jar intravital metal electrode, and the electric field region of wet oil by being produced by electrode makes the moisture in the crude oil produce electrocoagulation, finally makes oily water separation.The technological improvement of electric dewatering apparatus for crude oil concentrates on the shape of electrode and is provided with, and electrode materials all adopts the metal of good conductor, as Chinese patent 96224362.0,98207272.4 and 00125911.3.U.S. Pat 4,252,631 disclosed a kind of electrical dehydrators scribble the hydrophilic cellulose materials of one deck on its surface of metal electrode, and its electrode still belongs to the metal good conductor.Do not see the report that uses other electrode materials in the prior art.Use the metal good conductor to make the electrode of electric dewatering apparatus for crude oil, under the oil property normal circumstances, can satisfy the dehydrating of crude oil needs well, but when crude oil medium electric conductivity height or water content increase, as moisture greater than 20% o'clock, supply current can sharply increase, be easy to generate overcurrent tripping, destroy technological operation, make dehydrating of crude oil be difficult to reach requirement.
Summary of the invention
Current most oilfield exploitation is to the later stage, and oil property descends year by year, and the crude oil specific conductivity increases, water content raises, and the apparatus for electrodewatering electric current increases, and usually produces the overcurrent tripping phenomenon, thereby the dehydrating of crude oil index can not be guaranteed, and having had a strong impact on dehydrating effect, device can not normal running simultaneously.Technical problem to be solved by this invention is a kind of electric dewatering apparatus for crude oil of exploitation, when increase of crude oil specific conductivity or water content in crude oil rising, can not produce overcurrent tripping, but quiet run guarantees the dehydrating of crude oil effect.
What technical solution of the present invention was total is contemplated that: the electrode of electric dewatering apparatus for crude oil adopts semiconductor material to make.The present invention proposes two concrete technical schemes for this reason: first kind of scheme, and the electrode of electric dewatering apparatus for crude oil adopts semi-conducting electrode; Second kind of scheme, the electrode of electric dewatering apparatus for crude oil adopts the metal electrode of band coated semiconductor.
Compare with the prior art electric dewatering apparatus for crude oil, the present invention adopts the metal electrode of semi-conducting electrode or band coated semiconductor, and when water content in crude oil increases, when specific conductivity increases, can avoid overcurrent tripping, service voltage can not descend a lot and the influence dehydration yet simultaneously.Electric dewatering apparatus for crude oil of the present invention can be saved power consumption greatly, and stable operation technology improves dehydration, ratio of desalinization, can be adapted to the dehydration pretreatment technology of oil field high water-content crude oil.When the water content in crude oil of handling fluctuates between 0～90%, but still quiet run of electric dewatering apparatus for crude oil of the present invention makes dehydration back crude oil water containing less than 2%, and can reduce power consumption about about 50%.
Following test can further prove beneficial effect of the present invention:
Experimental example:
In the 20ml glass test tube, add moisture 5%, 10%, 20%, 30%, 50%, 70% or 90% the crude oil of 20ml, add LY-AB type emulsion splitter 30ppm again, behind the thorough mixing, put into water bath with thermostatic control, steady temperature is 50 ℃, inserts the metal electrode of two semi-conducting electrodes or band coated semiconductor in vitro, interelectrode distance 1CM, after treating homo(io)thermism, applied the 800V/CM electric field 6 minutes, sedimentation is 24 minutes under the constant temperature, the profit layering, analyze the oil reservoir water content, finish test.Dewater by crude oil to above-mentioned different moisture content, divide condensation for removing water after crude oil water containing all less than 2%, and all do not have the overcurrent tripping phenomenon in the dehydration and take place.
Adopt metal electrode to repeat above-mentioned test, just begin that the overcurrent tripping phenomenon is arranged when moisture 10% the time, greater than the overcurrent tripping phenomenon just usually takes place for 20% (comprising 20%), normal electro-dewatering operation can not normally be carried out when moisture
By above test explanation, the metal electrode that adopts semi-conducting electrode or band coated semiconductor still can be kept normal crude oil electric dewatering operation at water content in crude oil under up to 90% situation.And the employing metal electrode, when water content in crude oil reaches 10%, particularly 20% normal electro-dewatering operation when above just can not normally be carried out.
Claims (2)
1, a kind of electric dewatering apparatus for crude oil comprises electrode, it is characterized in that: described electrode is a semi-conducting electrode.
2, a kind of electric dewatering apparatus for crude oil comprises electrode, it is characterized in that: described electrode is the metal electrode of band coated semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115875 CN1386824A (en) | 2002-05-20 | 2002-05-20 | Electric dewatering apparatus for crude oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02115875 CN1386824A (en) | 2002-05-20 | 2002-05-20 | Electric dewatering apparatus for crude oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1386824A true CN1386824A (en) | 2002-12-25 |
Family
ID=4743921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02115875 Pending CN1386824A (en) | 2002-05-20 | 2002-05-20 | Electric dewatering apparatus for crude oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1386824A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO330039B1 (en) * | 2006-05-16 | 2011-02-07 | Hamworthy Plc | Electrostatic coalescence |
| CN103805230A (en) * | 2012-11-02 | 2014-05-21 | 长江(扬中)电脱盐设备有限公司 | Novel high-speed electric desalting electrode plate |
-
2002
- 2002-05-20 CN CN 02115875 patent/CN1386824A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO330039B1 (en) * | 2006-05-16 | 2011-02-07 | Hamworthy Plc | Electrostatic coalescence |
| CN103805230A (en) * | 2012-11-02 | 2014-05-21 | 长江(扬中)电脱盐设备有限公司 | Novel high-speed electric desalting electrode plate |
| CN103805230B (en) * | 2012-11-02 | 2017-07-04 | 长江(扬中)电脱盐设备有限公司 | A kind of high-speed electric desalting battery lead plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |