CN1358824A - Highfrequency pulse raw oil electric dewatering device - Google Patents
Highfrequency pulse raw oil electric dewatering device Download PDFInfo
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- CN1358824A CN1358824A CN 01114971 CN01114971A CN1358824A CN 1358824 A CN1358824 A CN 1358824A CN 01114971 CN01114971 CN 01114971 CN 01114971 A CN01114971 A CN 01114971A CN 1358824 A CN1358824 A CN 1358824A
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Abstract
The high-frequency pulse crude oil electric dehydrater is formed from three-phase power supply, rectification circuit, IGBT translation circuit, auxiliary circuit, protection circuit, PWM drive circuit, high frequency transformer, high-frequency rectifier and high-frequency dehydrater. It is characterized by that the three-phase power supply is passed through the rectification circuit to make rectification, and come into IGBT translation circuit to make conversion to form high-frequency pulse, at the same time the auxiliary circuit provides control power supply to protection circuit, and it utilzies PWM drive circuit to protect and control output pulse width of IGBT and duty ratio, then it utilizes high-frequency transformer to boost and high-frequency rectifier to make rectification to form high-frequency high-voltage pulse. The pulse is passed through high-voltage non-explosive interface and high-voltage insulating rod, and introduced onto electrode plate of high-frequency electric dehydrater to form high-frequency pulse electric field in the dehydrater.
Description
The present invention is a kind of Highfrequency pulse raw oil electric dewatering device that is used for the crude oil dehydration, is not finding correlation technique as yet aspect three extraction liquid treatment technologies.
Dehydrating of crude oil be in the Crude Oil Processing an important step, direct current dehydration that adopt more in each oil field at present---chemical dehydration method, institute's making alive are interchange or the high direct voltage of 50HZ, and power supply mode generally has the dehydration of exchanging, direct current dehydration and hands over---.
Along with the oil field enters the high water-cut stage mining phase, most of oil district comprehensive water cut is up to 90%, and tertiary oil recovery technology has begun to use and have broad application prospect as the effective means that improves recovery ratio in the oil field.But a large amount of oil-displacing agents that " three adopt " uses, make the composition and the oil-water emulsion state of extraction liquid very complicated, emulsion viscosity is big, particle is trickle, breakdown of emulsion, sedimentation are all very difficult, and the insulating property variation of oil product, often make between the electrical dehydrator pole plate and produce short circuit phenomenon, conventional electro-dewatering can not meet the needs of production.If three times extraction liquid profit treatment process technology can not get fine solution, it will become the key of producing on popularization of restriction tertiary oil recovery technology and the maturing field stable yields.
The purpose of this invention is to provide a kind of Highfrequency pulse raw oil electric dewatering device that can handle three extraction liquid.
Technical scheme of the present invention realizes in the following manner:
The present invention is made up of three-phase supply, rectifying circuit, IGBT translation circuit, auxiliary circuit, holding circuit, PWM driving circuit, high-frequency transformer, hf rectifier and high-frequency electrical water trap.It is characterized in that three-phase supply advances the conversion of IGBT translation circuit through the rectifying circuit rectification and forms high-frequency impulse, auxiliary circuit provides the control power supply to holding circuit simultaneously, protects and control output pulse width and the dutycycle of IGBT by the PWM driving circuit.Form hf and hv pulse behind the tremendously high frequency rectifier rectification again after high-frequency transformer boosts, its pulse is introduced on the high-frequency electrical water trap battery lead plate through high-voltage explosion-proof interface and High-Voltage Insulation rod, forms the high-frequency impulse electric field in the high-frequency electrical water trap;
The high-voltage explosion-proof interface is that the high-voltage output line of hf rectifier and the connection portion of electrical dehydrator are sealed the teflon insulation rod with explosion-proof sleeve, with withstand voltage stainless steel flexible hose the terminal box of explosion-proof sleeve and hf rectifier output cable is coupled together again, support with tetrafluoroethylene between stainless steel flexible hose and the cable, and be full of transformer oil, improve insulating property;
Establish three layers of flat hanging electrode in the high-frequency electrical water trap, the middle level electrode grounding, two-layer up and down electrode connects the high-voltage output end of high frequency vertoro.
High-frequency impulse dehydration and conventional comparison of dewatering:
From the electrical property of milk sap as can be known, any milk sap all has its critical breakdown electric field intensity, when the strength of electric field that adds exceeds its critical breakdown electric field intensity, milk sap can be short-circuited, after electric field disappears, the short circuit meeting disappears, and its critical breakdown electric field intensity of milk sap of different nature and short circuit formation time are also different with the short circuit extinction time.Particularly three extraction liquid disruptive critical voltages are low, and the short circuit extinction time is long, is difficult to send electricity with conventional electrical dehydrator, and often cause the water trap inter-electrode short-circuit, and are very unfavorable to dehydrating of crude oil.
The input voltage of high-frequency electrical water trap is a high-frequency impulse, by adjusting the frequency and the dutycycle of high-frequency impulse, makes high-frequency impulse output time (pulse width) less than the short circuit formation time, and the pitch time of high-frequency impulse is greater than the short circuit extinction time.That is to say that before the milk sap short circuit formed, high-frequency impulse had just disappeared, the milk sap short circuit disappears, and insulating property are sent out next pulse after recovering again.High-frequency impulse dehydration is compared with conventional AC and DC dehydration, and biggest advantage is to handle higher moisture, milk sap that insulating property are relatively poor particularly during three extraction liquid, can guarantee the stable of water trap internal electric field, thereby improve the dehydrating of crude oil effect.
Elaborate by example below in conjunction with Figure of description in order further to disclose technical scheme of the present invention:
Fig. 1-Highfrequency pulse raw oil electric dewatering device principle of work block diagram
Fig. 2-Highfrequency pulse raw oil electric dewatering device schematic circuit diagram
Fig. 3-Highfrequency pulse raw oil electric dewatering device circuit connection diagram
Highfrequency pulse raw oil electric dewatering device principle of work three-phase supply 1 as shown in Figure 1, 2, 3 forms high-frequency impulse to 3 conversion of IGBT translation circuit after rectifying circuit 2 rectifications.The control power supply that while auxiliary circuit 4 provides protects and controls output pulse width and the dutycycle of IGBT by PWM driving circuit 6 to holding circuit 5.High-frequency impulse forms hf and hv pulse after 8 rectifications of tremendously high frequency rectifier after high-frequency transformer 7 boosts, hf and hv pulse forms the high-frequency impulse electric field and dewaters in electrical dehydrator on high-voltage explosion-proof interface and High-Voltage Insulation rod introducing high-frequency electrical water trap battery lead plate.
The concrete Fig. 3 that presses illustrates that 10 among the figure is meant the circuit shown in 1～6 among Fig. 1, it is pegged graft form high frequency electric source producer 10; Among the figure 11 is meant high-frequency transformer shown in 7～8 among Fig. 1 and hf rectifier, and it is combined to form high frequency vertoro 11.Three-phase supply becomes high-frequency impulse tremendously high frequency vertoro 11 through the processing of Fig. 3 medium-high frequency power source generator 10 and becomes hf and hv pulse, by high frequency vertoro 11 outgoing cables 13 on high-voltage explosion-proof interface and High-Voltage Insulation rod 15 cause battery lead plate 16 in the high frequency water trap 9 '.So-called high-voltage explosion-proof interface is meant with high-voltage explosion-proof sleeve 14 the sealing of teflon insulation rod, flexible pipe 12 with withstand voltage Stainless Steel Wire braiding couples together the terminal box of high-voltage explosion-proof sleeve 14 with the high pressure output cable 13 of high frequency vertoro 11 again, support with tetrafluoroethylene between stainless steel flexible hose 12 and the high-tension cable 13, and be full of transformer oil, improve insulating property.
Again sets forth in detail is made at each key problem in technology position of the present invention below:
1, high frequency electric source producer
Output rating 5-50kVA, output voltage 0-380V, output frequency are 1000-2500HZ (step-less adjustment), and waveform is the square square wave.And be provided with overheating protection, overvoltage protection, open-phase protection and overcurrent protection, by the automatic adjusting to dutycycle, power source generator is constant current output when maximum current.
The switching element of high frequency electric source producer adopts igbt (abbreviation IGBT), is the power semiconductor device of new generation that development in recent years is got up.It has advantages such as working speed is fast, input resistance is high, thermal stability is good, driving is simple, blocking voltage is high, current capacity is strong, is to have one of power semiconductor device of development prospect most.
The high frequency electric source producer mainly is made up of triphase silicon rectification circuit, frequency conversion main power circuit, driving circuit, pulse-width modulation circuit, pulse boostering circuit.Pulse-width modulation circuit can be adjusted the pulse output frequency.The circuit structure schematic diagram is seen accompanying drawing 1.
2, high frequency vertoro
Output rating 5-50kVA, output voltage 20-35kV (adjustable), output frequency are 1000-2500HZ (step-less adjustment), and waveform is the square square wave.
The high frequency vertoro is made up of transformer and rectifier two portions.The high pressure winding of high-frequency transformer and low pressure winding are made up of two split line bags respectively, strengthened the thickness of insulating layer of interlayer and turn-to-turn, rectifier is made up of the diode of two reverse parallel connections, and transformer does when oil-filled and vacuumize processing, to improve insulation strength.
3, high-voltage explosion-proof interface and High-Voltage Insulation rod
Rated pressure 1.0MP, 160 ℃ of temperature ratings, voltage rating 100kV.
The high-voltage explosion-proof interface adopts oil-filled explosion-proof structure for the high-voltage terminal of dehydration vertoro and the connection portion of electrical dehydrator.Explosion-proof sleeve with withstand voltage 1.0MPa seals the teflon insulation rod, stainless steel flexible hose with withstand voltage 1.6MPa couples together explosion-proof sleeve and dehydration vertoro high-voltage terminal terminal box, high-tension cable is fixed on the middle part of stainless steel flexible hose, high-tension cable supports with teflon support, in order to avoid high-tension cable contacts with stainless steel flexible hose inwall.In this closed system, be full of transformer oil, strengthen the insulation of high-tension cable.The operating pressure that is higher than electrical dehydrator can be born by the high-voltage terminal system, when dehydration insulation rod over-voltage breakdown, oil and gas leakage can not take place, and can avoid the generation of fire failure.
The High-Voltage Insulation rod is made by Teflom Insulation Material, it has characteristics 160kV such as heatproof is high 160 ℃, breakdown voltage resistant height, and it is very convenient that maintenance is installed.
The structure of high-voltage explosion-proof interface and High-Voltage Insulation rod is seen accompanying drawing 3
4, high-frequency electrical water trap
160 ℃ of rated pressure 1.0MP, temperature ratings.
(1) structure of high-frequency electrical water trap
Establish triple electrode in the electrical dehydrator, the middle level electrode grounding, two-layer up and down electrode connects the high-pressure side of high frequency vertoro.The mode of connection is seen accompanying drawing 3.The electrode group adopts three layers of flat electrode of hanging, and the employing polytetrafluoroethylmaterial material is hung in insulation, characteristics such as that polytetrafluoroethylmaterial material has is high temperature resistant, corrosion-resistant, good insulation preformance.
Bottom and top at electrical dehydrator are respectively equipped with the oil-feed divider, go out oil trap.Oil-feed divider, the effect that goes out oil trap are to make the flow field in the water trap stable, and be fully coalescent, settlement separate in electrical dehydrator to guarantee water droplet; Make wet oil enter electrical dehydrator equably, the crude oil uniform and stable ground after the dehydration flows out electrical dehydrator.
(2) inflation method of electrical dehydrator internal electric field gradient
A. in the electrical dehydrator interelectrode distance from bottom to top spacing dwindle gradually, strength of electric field strengthens the wet oil that enters electrical dehydrator gradually and is introduced into weak electric field and dewaters, in weak electric field, can remove bigger water droplet, simultaneously, the specific conductivity of crude oil will reduce gradually, crude oil constantly flows toward water trap top, enters in the stronger electric field, to deviate from littler water droplet.
B. by adjusting the voltage range of high frequency vertoro high-voltage output end, adjust the strength of electric field in the electrical dehydrator.
C. adjust strength of electric field in the electrical dehydrator automatically by high frequency pulse power supply.
(3) water-oil interface of electrical dehydrator control
Because the water-oil interface in the electrical dehydrator often are not clear interfaces, there is very thick emulsion layer, the thickness of emulsion layer is from tens centimetres to tens centimetres, emulsion layer upper and lower density is very nearly the same, so traditional differential pressure type and float-type interface proofing unit are difficult to operation reliably and with long-term, emulsion layer exists significantly a conduction and insulating layering on electrology characteristic in addition, but not electrical method is difficult for differentiating.Therefore be provided with radio frequency admittance circle water-oil interface control device at the electrical dehydrator top and install, this interface instrument is made up of a radio frequency admittance interface transmitter and rigidity transmitter, charged dehydration protector special, and the transmitter top electric field that adds high pressure is protected the utmost point.Radio frequency admittance water-oil interface instrument can address this problem well, and can realize discharging water automatically.
The high-frequency electrical pulses dehydration technique is sophisticated technically, is feasible on producing.Crude oil water containing≤2%, the sewage with oil≤1000mg/L of combination flooding produced liquid after the high-frequency electrical water trap is handled reached " crude oil electric dewatering design specifications " requirement (SY/T0045-1999).
Claims (3)
1; a kind of Highfrequency pulse raw oil electric dewatering device; by three-phase supply; rectifying circuit; the IGBT translation circuit; auxiliary circuit; holding circuit; the PWM driving circuit; high-frequency transformer; hf rectifier and high-frequency electrical water trap are formed; it is characterized in that three-phase supply advances the conversion of IGBT translation circuit through the rectifying circuit rectification and forms high-frequency impulse; auxiliary circuit provides the control power supply to holding circuit simultaneously; protect and control output pulse width and the dutycycle of IGBT by the PWM driving circuit; after boosting, high-frequency transformer forms hf and hv pulse behind the tremendously high frequency rectifier rectification again; its pulse is introduced on the high-frequency electrical water trap battery lead plate through high-voltage explosion-proof interface and High-Voltage Insulation rod, forms the high-frequency impulse electric field in the high-frequency electrical water trap.
2, require 1 described Highfrequency pulse raw oil electric dewatering device according to letter of authorization, it is characterized in that the high-voltage explosion-proof interface is that the high-voltage output line of hf rectifier and the connection portion of electrical dehydrator are sealed the teflon insulation rod with explosion-proof sleeve, with withstand voltage stainless steel flexible hose the terminal box of explosion-proof sleeve and hf rectifier output cable is coupled together again, support with tetrafluoroethylene between stainless steel flexible hose and the cable, and be full of transformer oil, improve insulating property.
3, require 1 described Highfrequency pulse raw oil electric dewatering device according to letter of authorization, it is characterized in that establishing in the electrical dehydrator three layers of flat hanging electrode, the middle level electrode grounding, two-layer up and down electrode connects the high-voltage output end of high frequency vertoro.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB01114971XA CN1171975C (en) | 2001-05-25 | 2001-05-25 | Highfrequency pulse raw oil electric dewatering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB01114971XA CN1171975C (en) | 2001-05-25 | 2001-05-25 | Highfrequency pulse raw oil electric dewatering device |
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| Publication Number | Publication Date |
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| CN1358824A true CN1358824A (en) | 2002-07-17 |
| CN1171975C CN1171975C (en) | 2004-10-20 |
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| CNB01114971XA Expired - Fee Related CN1171975C (en) | 2001-05-25 | 2001-05-25 | Highfrequency pulse raw oil electric dewatering device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101800115A (en) * | 2010-04-02 | 2010-08-11 | 胜利油田胜利勘察设计研究院有限公司 | High-frequency pulse crude oil dehydration transformer |
| CN101829440A (en) * | 2010-06-18 | 2010-09-15 | 北京博电兴源节能科技有限公司 | High-voltage pulse water-oil separation method |
| CN102079983A (en) * | 2009-11-26 | 2011-06-01 | 江苏三星化工有限公司 | Process and complete equipment for pretreating coal tar |
| CN101549218B (en) * | 2008-04-01 | 2012-06-20 | 哈尔滨理工大学 | Crude oil pre-dewatering and controlling equipment |
| CN102585892A (en) * | 2012-02-21 | 2012-07-18 | 中国石油大学(北京) | Crude oil electro-desalting dehydrator based on double-phase and single-phase rectifier power supply |
| CN111410987A (en) * | 2019-01-07 | 2020-07-14 | 中国石油天然气股份有限公司 | Processing device and application of crude oil intermediate emulsion layer |
-
2001
- 2001-05-25 CN CNB01114971XA patent/CN1171975C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549218B (en) * | 2008-04-01 | 2012-06-20 | 哈尔滨理工大学 | Crude oil pre-dewatering and controlling equipment |
| CN102079983A (en) * | 2009-11-26 | 2011-06-01 | 江苏三星化工有限公司 | Process and complete equipment for pretreating coal tar |
| CN101800115A (en) * | 2010-04-02 | 2010-08-11 | 胜利油田胜利勘察设计研究院有限公司 | High-frequency pulse crude oil dehydration transformer |
| CN101829440A (en) * | 2010-06-18 | 2010-09-15 | 北京博电兴源节能科技有限公司 | High-voltage pulse water-oil separation method |
| CN102585892A (en) * | 2012-02-21 | 2012-07-18 | 中国石油大学(北京) | Crude oil electro-desalting dehydrator based on double-phase and single-phase rectifier power supply |
| CN111410987A (en) * | 2019-01-07 | 2020-07-14 | 中国石油天然气股份有限公司 | Processing device and application of crude oil intermediate emulsion layer |
| CN111410987B (en) * | 2019-01-07 | 2023-11-28 | 中国石油天然气股份有限公司 | Treatment device for crude oil middle emulsion layer and application |
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| Publication number | Publication date |
|---|---|
| CN1171975C (en) | 2004-10-20 |
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