CN102220156A - Electro-desalting and dehydrating method for crude oil - Google Patents
Electro-desalting and dehydrating method for crude oil Download PDFInfo
- Publication number
- CN102220156A CN102220156A CN2010101448873A CN201010144887A CN102220156A CN 102220156 A CN102220156 A CN 102220156A CN 2010101448873 A CN2010101448873 A CN 2010101448873A CN 201010144887 A CN201010144887 A CN 201010144887A CN 102220156 A CN102220156 A CN 102220156A
- Authority
- CN
- China
- Prior art keywords
- crude oil
- water
- oil
- microwave
- desalting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention provides an electro-desalting and dehydrating method for crude oil, which comprises the following steps of: heating the crude oil to 115-155 DEG C, injecting water with the weight accounting for 3% to 8% of the total weight of the crude oil, then adding an emulsion breaker with the weight accounting for 0-25mug/g of the total weight of the crude oil to form an oil water mixture; leading the oil water mixture to enter a microwave environment with the microwave frequency of 200MHz to 30000 MH2 and be processed for 3-10 minutes, and entering a desalting tank with the pulse electric-field intensity of 500V/cm to 1500V/cm, the frequency of 90Hz to 750Hz and the duty ratio of 15% to 50% and remaining for 25-50 minutes, and finally separating sewage to obtain the purified crude oil. According to the method, the effect of mixing reinforcement is achieved by using the characteristic of selectivity heating of microwaves on liquids, thereby the desalination rate is increased; and by using an interrupted power supply mode of a pulse transformer, the purposes of desalination and dehydration are achieved and the power consumption of desalination is reduced.
Description
Technical field
The present invention relates to the refining hydrocarbon ils of electrical method or magnetic method, particularly remove the method for salt and water in the hydrocarbon ils with microwave and pulse.
Background technology
Crude oil is in the recovery process in oil field, need inject a large amount of water and emulsifying agent owing to recover the oil, make that exploiting out crude oil contains portion water, the oil-water emulsion degree is serious, and different according to the oil-field development time limit with the strengthening mining mode, the variation range of crude oil water containing is also bigger.Because the existence of water solution of oil has increased the accumulating burden in the crude oil concerning the oil field, because the existence of water and other impurity increases the erosion rate of crude oil storage tank and pipe laying, reduced their life-span simultaneously.
In the petroleum refining process of refinery, the crude oil of going into factory is through the oil field processed, and water-content wherein is generally less than 0.5%, and contained impurity such as inorganic salts in the water will not make CDU produce corrosion and fouling if do not remove; Secondary processing process influence to crude oil is very big especially, makes poisoning of catalyst, and the corrosion production equipment influences the long period smooth running of device.
Therefore no matter in the oil field or the refinery, the desalting and dewatering of the crude oil crude oil upgrading technology that is absolutely necessary, along with the development of secondary processing process, the trend that also oriented advanced desalination dehydration develops more and more is subjected to general attention.
Crude oil electric desalting is to inject suitable water and emulsion splitter in crude oil, through mixing profit is fully contacted, and can enter in the water by water-soluble impurity in the crude oil, through electric desalting apparatus, under the effect under certain electric field, the certain temperature, destroy milk sap, realize the settled process of oily water separation.Thereby reach the purpose of desalting and dewatering.
Microwave is meant that frequency is the hertzian wave of 300MHz-300KMHz, has the characteristic of selectivity heating.The ability of material absorbing microwave is mainly decided by its dielectric dissipation factor.The big material of dielectric dissipation factor is just strong to the receptivity of microwave, on the contrary, the ability of the material absorbing microwave that dielectric dissipation factor is little also a little less than.Because the loss factor of each material there are differences, microwave heating just shows the characteristics of selectivity heating.Material difference, the thermal effect of generation are also different.Water molecules belongs to polar molecule, and specific inductivity is bigger, and its dielectric dissipation factor is also very big, and microwave is had strong receptivity.
Polar molecule is from the polarity oriented of original stochastic distribution state shift according to electric field.And under the high-frequency electromagnetic field action, these orientations constantly change by the frequency of alternating electromagnetism, thereby this process causes the motion of molecule to produce heat with mutual friction mutually, the material of forming by polar molecule, can absorb micro-wave energy preferably, water molecules is extremely strong polarity, is the best medium that absorbs microwave, so all materials that contains water molecules must absorb microwave.
When microwave action during in crude oil emulsion, because of its to nonpolar in the crude oil or the effect of hydrocarbons (specific inductivity is generally less) that polarity is less a little less than, and polar material such as water and the salt (specific inductivity is bigger than normal) that is easy to become solution in water are had very strong interaction, can change the Yan Heshui in the crude oil into separate easily and the material removed.Can keep the overall performance of crude oil so substantially, can the Yan Heshui in the crude oil be handled targetedly again, play the effect of selectively acting.
The pulsing electrical desalting technology is the novel electric desalting technology of development in recent years, pulsed voltage, pulse duty factor, pulse-repetition are adjustable continuously, between pole plate, form pulsed electrical field, the field voltage waveform is two-way or the unidirectional pulse square wave, puncture theoretical according to the medium high voltage electric, the voltage breakdown of medium is relevant with action time, action time is short more, voltage breakdown is high more, therefore, pulse transformer can be kept the given voltage of transformer when crude oil water content is higher, keeps a jar internal electric field intensity, thereby reach the high-speed and high-efficiency breakdown of emulsion, the purpose of quick desalination dehydration.
For the technology that the pulse electric field is applied to crude oil electric desalting, CN101037612A proposes to utilize the pulsed voltage electric desalting technology to remove crude oil water containing saliferous technology, and this patent proposes to utilize impulse electric field strength to handle 0.9g/cm for the highfield of 1500V/cm-4000V/cm
3Following crude oil effect is fine, but it does not reach the requirement that now a lot of refinerys are handled a lot of high-density crude oil inferior, and strength of electric field is too high, is easy to generate emulsification.
Summary of the invention
The invention provides a kind of crude oil electric desalting dewatering process, its purpose is the deficiency at existing crude oil electric desalting dewatering process existence, propose a kind of method of utilizing microwave-pulse combined to carry out electrodesalting and electrodehydrating, satisfying under the condition of desalting and dewatering, reduce the usage quantity and the power consumption of emulsion splitter.
For achieving the above object, the present invention improves a kind of crude oil electric desalting dewatering process, and concrete technical scheme is:
1), best 115 ℃～140 ℃, injects and account for crude oil gross weight 3～8 weight % with heating crude oil to 115 ℃～155 ℃, the water of best 5～8 weight %, adding accounts for crude oil gross weight 0～25 μ g/g emulsion splitter, best 0～10 μ g/g again, form oil-water mixture, enter step 2);
2) oil-water mixture from step 1) enters microwave environment, and microwave frequency is 2000MHz～3000MHz, and preferably 2200MHz～2800MHz entered step 3) after 3～10 minutes;
3) from step 2) the oil-water mixture after microwave treatment to enter impulse electric field strength be 500V/cm～1500V/cm, best 500V/cm～1000V/cm, frequency 90Hz～750Hz, best 100Hz～550Hz, dutycycle is 15%～50%, best 15%～35% desalter, stopped 25～50 minutes, and isolated sewage, be purified crude oil, the cleaned crude oil that obtains satisfies when salt and water-content require and device, turns back to step 1) when not meeting the demands.
Dutycycle of the present invention is conduction time and the ratio of recurrence interval.
Water in the step 1) of the present invention is pH value 6～11 fresh waters or purifies waste water.
Crude oil electric desalting dewatering process provided by the invention compared with prior art has following beneficial effect: the inventive method utilizes the characteristic of microwave selective heating to strengthen the profit contact, strengthens mixed effect; Adopt the pulsed high voltage generator power supply mode, the pulse power makes between jar interior electrode and forms pulsed electrical field, and pulsing electrical desalting technology voltage is pulse square wave, be the interruptedly supplying power mode, reduced conduction time, avoided again producing the reduction or the short circuit of voltage, thereby can save power consumption because of electric current increases.High-voltage pulse can be realized pole plate electric field instantaneous pressure, produces very big concussion, and emulsifying film is broken, and has accelerated water droplet collision and gathering, has improved oily water separation efficient, can reduce the consumption of emulsion splitter.Have efficient breakdown of emulsion, characteristics that oily water separation is fast.
Material by polar molecule is formed can absorb micro-wave energy preferably, and water molecules is extremely strong polarity, is the best medium that absorbs microwave, so all materials that contains water molecules must absorb microwave, every kilowatt-hour of microwave electric energy can make 1.39 kilograms water vapor.
The present invention utilizes microwave that the characteristic of the selective heating of liquid is reached the effect of enhancing blended, thereby improves ratio of desalinization; Utilize the interruptedly supplying power mode of pulse transformer, reduced conduction time, reach the purpose of desalting and dewatering, can reduce the desalination power consumption again, generally can economize on electricity more than 50%.
Embodiment
Describe the present invention in detail with specific embodiment below, but do not limit the scope of the invention.
Embodiment 1
Oil density is 934.1Kg/m
3, water-content 0.05%, salts contg are 132.6mgNaCl/L, and emulsion splitter is water-soluble ERI1160, and water filling is fresh water PH=7,135 ℃ of desalination temperature.
Single stage desalting emulsion splitter add-on is 20 μ g/g, and water filling 8% adds frequency and be the microwave 3 minutes of 2000MHz after the mixing, added electric field intensity 600V/cm again, dutycycle 50%, the pulsed electrical field of pulse-repetition 90Hz 40 minutes; Secondary desalination emulsion splitter add-on is 10 μ g/g, and water filling 6% adds frequency and be the microwave 3 minutes of 200MkHz after the mixing, added electric field intensity 600V/cm again, dutycycle 50%, the pulsed electrical field of pulse-repetition 90Hz 40 minutes; Three grades of desalination emulsion splitter add-ons are 10 μ g/g, water filling 5%, add frequency after the mixing and be the microwave 3 minutes of 2000MHz, added electric field intensity 600V/cm again, dutycycle 50%, the pulsed electrical field of pulse-repetition 90Hz 40 minutes is measured the salt in the oil and the content of water behind each grade desalting and dewatering respectively, the results are shown in Table 1.
Three grades of desalting and dewatering effects of table 1
Embodiment 2
Certain oil density is 934.1Kg/m
3, water-content 0.05%, salts contg are 132.6mgNaCl/L, and emulsion splitter is water-soluble ERI1160, and water filling is fresh water PH=7,135 ℃ of desalination temperature.
Single stage desalting emulsion splitter add-on is 15 μ g/g, and water filling 8% adds frequency and be the microwave 6 minutes of 2800MHz after the mixing, added electric field intensity 1000V/cm again, dutycycle 20%, the pulsed electrical field of pulse-repetition 600Hz 30 minutes; Secondary desalination emulsion splitter add-on is 8 μ g/g, and water filling 6% adds frequency and be the microwave 6 minutes of 2800MHz after the mixing, added electric field intensity 1000V/cm again, dutycycle 20%, the pulsed electrical field of pulse-repetition 600Hz 30 minutes; Three grades of desalination emulsion splitter add-ons are 5 μ g/g, water filling 5%, add frequency after the mixing and be the microwave 6 minutes of 2800MHz, added electric field intensity 1000V/cm again, dutycycle 20%, the pulsed electrical field of pulse-repetition 600Hz 30 minutes is measured the salt in the oil and the content of water behind each grade desalting and dewatering respectively, the results are shown in Table 2.
Three grades of desalting and dewatering effects of table 2:
Embodiment 3 (Comparative Examples)
The present embodiment desalination adopts common whole impedance transformer that crude oil is applied electric field, compares with novel combined electrical desalting technology, mainly contrasts emulsion splitter injection rate, ratio of desalinization and power consumption.
Certain oil density is 934.1Kg/m
3, water-content 0.05%, salts contg are 132.6mgNaCl/L, and emulsion splitter is water-soluble ERI1160, and water filling is fresh water PH=7,135 ℃ of desalination temperature.
Single stage desalting emulsion splitter add-on is 20 μ g/g, water filling 8%, the alternating-current that the back added electric field intensity of mixing is 600V/cm 40 minutes; Secondary desalination emulsion splitter add-on is 10 μ g/g, water filling 6%, the alternating-current that the back added electric field intensity of mixing is 600V/cm 40 minutes; Three grades of desalination emulsion splitter add-ons are 10 μ g/g, and water filling 5% mixes back added electric field intensity and be the alternating-current 40 minutes of 600V/cm, measure the salt in the oil and the content of water behind each grade desalting and dewatering respectively, the results are shown in Table 3.
Three grades of desalting and dewatering results of table 3
From above-mentioned three table contrasts as can be known, under the identical situation of condition, adopt the traditional whole impedance transformer of the comparable usefulness of novel combined electrical desalting technology electric desalting technology can save the part emulsion splitter, economize on electricity is more than 50%, and can also improve ratio of desalinization, concrete data are different and different with the crude oil kind.
Claims (5)
1. crude oil electric desalting dewatering process is characterized in that may further comprise the steps:
1) with heating crude oil to 115 ℃～155 ℃, injects the water that accounts for crude oil gross weight 3～8 weight %, add the emulsion splitter that accounts for crude oil gross weight 0～25 μ g/g again, form oil-water mixture, enter step 2);
2) oil-water mixture from step 1) enters microwave environment, and microwave frequency is 2000MHz～3000MHz, enters step 3) after 3～10 minutes;
3) from step 2) the oil-water mixture after microwave treatment to enter impulse electric field strength be that 500V/cm～1500V/cm, frequency are that 90Hz～750Hz, dutycycle are 15%～50% desalter, stopped 25～50 minutes, isolate sewage, be purified crude oil, the cleaned crude oil that obtains satisfies when salt and water-content require and device, turns back to step 1) when not meeting the demands.
2. crude oil electric desalting dewatering process according to claim 1, it is characterized in that: in described step 1) with heating crude oil to 115 ℃～140 ℃, injection accounts for the water of crude oil gross weight 5～8 weight %, adds the emulsion splitter that accounts for crude oil gross weight 0～10 μ g/g again.
3. crude oil electric desalting dewatering process according to claim 1 and 2 is characterized in that: microwave frequency is 2200MHz～2800MHz described step 2).
4. crude oil electric desalting dewatering process according to claim 1 and 2 is characterized in that: impulse electric field strength is 500V/cm～1000V/cm in the described step 3), and frequency is 100Hz～550Hz, and dutycycle is 15%～35%.
5. crude oil electric desalting dewatering process according to claim 2, it is characterized in that: microwave frequency is 2200MHz～2800MHz described step 2), impulse electric field strength is 500V/cm～1000V/cm in the described step 3), and frequency is 100Hz～550Hz, and dutycycle is 15%～35%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101448873A CN102220156A (en) | 2010-04-13 | 2010-04-13 | Electro-desalting and dehydrating method for crude oil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101448873A CN102220156A (en) | 2010-04-13 | 2010-04-13 | Electro-desalting and dehydrating method for crude oil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102220156A true CN102220156A (en) | 2011-10-19 |
Family
ID=44776870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101448873A Pending CN102220156A (en) | 2010-04-13 | 2010-04-13 | Electro-desalting and dehydrating method for crude oil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102220156A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628137A (en) * | 2018-12-13 | 2019-04-16 | 中海油天津化工研究设计院有限公司 | A kind of method of microwave treatment ageing oil |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2160762C1 (en) * | 2000-08-10 | 2000-12-20 | Общество с ограниченной ответственностью "БИГ-96" | Crude oil dehydration and desalting process |
| CN101161789A (en) * | 2007-11-27 | 2008-04-16 | 辽宁大学 | Sand-containing emulsification crude oil demulsification method |
| CN101475832A (en) * | 2009-01-23 | 2009-07-08 | 中国石油化工集团公司 | Crude oil electric desalting dewatering process |
-
2010
- 2010-04-13 CN CN2010101448873A patent/CN102220156A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2160762C1 (en) * | 2000-08-10 | 2000-12-20 | Общество с ограниченной ответственностью "БИГ-96" | Crude oil dehydration and desalting process |
| CN101161789A (en) * | 2007-11-27 | 2008-04-16 | 辽宁大学 | Sand-containing emulsification crude oil demulsification method |
| CN101475832A (en) * | 2009-01-23 | 2009-07-08 | 中国石油化工集团公司 | Crude oil electric desalting dewatering process |
Non-Patent Citations (2)
| Title |
|---|
| 刘惠玲: "微波脱水技术", 《油田地面工程（OSE）》, vol. 11, no. 4, 31 August 1992 (1992-08-31) * |
| 白志山，汪华林，唐良瑞: "原油脱盐脱水技术评述", 《化工机械》, vol. 31, no. 6, 31 December 2004 (2004-12-31) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109628137A (en) * | 2018-12-13 | 2019-04-16 | 中海油天津化工研究设计院有限公司 | A kind of method of microwave treatment ageing oil |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101475832B (en) | Crude oil electric desalting dewatering process | |
| CN100545241C (en) | A kind of crude oil pulsing electrical desalting technique | |
| CN101953227B (en) | RF heating of a dielectric fluid | |
| CN103849428B (en) | A kind of magnetoelectricity field emulsion treater | |
| CN101352666B (en) | Compound demulsifying agent and method of use thereof | |
| CN110903850B (en) | Crude oil electric desalting equipment and method | |
| CN104927895B (en) | High-acid crude oil electro-desalting process | |
| CN101121898A (en) | Fast emulsion breaking method | |
| CN107216912A (en) | A kind of oil field emulsifies Method for treatment of oil and processing unit always | |
| CN104556513A (en) | Sump oil dehydration technology and device | |
| CN202016989U (en) | Electric desalting and dehydrating device | |
| CN110317634A (en) | A kind of processing system and method for crude oil dewatering and desalting | |
| CN102220156A (en) | Electro-desalting and dehydrating method for crude oil | |
| CN207330856U (en) | A kind of aging oil treatment system | |
| CN102061188A (en) | Novel high-speed electrical desalting and dewatering apparatus | |
| CN204824743U (en) | Magnetoelectric emulsion breaker | |
| RU2545278C2 (en) | Fluid treatment method and device for its implementation | |
| CN104419448A (en) | Crude oil electric desalting process | |
| Xu | Fast and Energy-efficient demulsification for crude oil emulsions using pulsed electric field | |
| CN105802650A (en) | High-temperature coal tar dewatering method and high-temperature coal tar dewatering device | |
| CN114426870A (en) | Crude oil electric desalting equipment and electric desalting method | |
| CN1424128A (en) | High-frequency and high-pressure oil and water separating method and devices | |
| CN206529434U (en) | A kind of efficient magnetoelectricity emulsion breaker | |
| CN104531205A (en) | Microwave-enhanced static crude oil dehydration device | |
| CN102952565B (en) | Electric desalting and dewatering method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant after: China Petrochemical Group Corp. Co-applicant after: Luoyang Petrochemical Engineering Corporation /SINOPEC Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Applicant before: China Petrochemical Group Corp. Co-applicant before: Luoyang Petrochemical Engineering Co., China Petrochemical Group |
|
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111019 |
|
| WD01 | Invention patent application deemed withdrawn after publication |