CN202849338U - Digital electric dehydrating control system for crude oil - Google Patents
Digital electric dehydrating control system for crude oil Download PDFInfo
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- CN202849338U CN202849338U CN201220562924.7U CN201220562924U CN202849338U CN 202849338 U CN202849338 U CN 202849338U CN 201220562924 U CN201220562924 U CN 201220562924U CN 202849338 U CN202849338 U CN 202849338U
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Abstract
The utility model provides a digital electric dehydrating control system for crude oil. The digital electric dehydrating control system comprises a crude oil dehydrating cylinder body, a dehydrating power supply and a control device, wherein the control device is based on a process control computer (PCC), and a high-voltage mid-frequency impulse power supply is used as the dehydrating power supply; and the PCC-based control device is used for adjusting and controlling the impulse voltage, current, frequency and duty cycle of the high-voltage mid-frequency impulse power supply, thereby realizing the digital control of the crude oil electric dehydrating process. The digital electric hydrating control system for the crude oil can be used for hydrating the crude oil which is high in water content (crude oil containing water up to 95%), high in mineralization and relatively low in insulation performance; the water containing in the crude oil is essential in form of a trace after the hydrating, thus the cost of outputting the water containing in the crude oil, the cost of secondary treatment and the like, can be reduced; simultaneously, the cost of overhauling an output pump and a pipeline is reduced; and the oil containing in the treated sewage is less than 50PPM, and the electricity less than 48 degrees is consumed while processing the sewage per 1000 cubic meters, so that the purposes of high efficiency, energy-saving performance, good hydrating effect and low production cost can be realized.
Description
Technical field
The utility model belongs to crude oil electric dewatering equipment technology field, be specifically related to a kind of Controlling System and control method that is suitable for the relatively poor dehydrating of crude oil of high moisture (moisture 95% the crude oil that reaches), high salinity and insulating property, espespecially wherein the total sub-power supply of high pressure medium-frequency pulse.
Background technology
In the stratum, contain inevitably a large amount of water and salt the exploitation crude oil out, this has brought many negative impacts to links such as follow-up accumulating, refining processing, therefore generally need to carry out processed so that the water content before defeated outside it is lower than 0.5% to crude oil in the oil field.Salt in the crude oil mainly exists with the form of alkali and alkaline earth metal ions salt; Mainly with 3 kinds of existence forms such as dissolved water, emulsified water, waters in suspension, wherein emulsified water is comparatively stable for water, and is difficult to adopt conventional standing sedimentation method to be removed.Up to now, people have carried out large quantity research for the separation problem of water solution of oil, on the basis of the auxiliary breakdown of emulsion of chemistry, the measures such as electrostatic coalescence, centrifugation, microwave radiation, ultrasonic wave, membrane sepn have been proposed again, but the first-elected electrostatic coalescence method of really being used widely in Production Flow Chart, corresponding equipment has electrical dehydrator and electric desalting device two large classes.Utilize the electrostatic coalescence effect to carry out the electro-dewatering of crude oil emulsion, not only economic performance is better, and also comparatively friendly to surrounding environment.
Conventional electro-dewatering method is mostly adopted in each oil field at present, it adds interchange or high direct voltage that frequency is 50 Hz, power supply mode generally has the dehydration of interchange, direct current dehydration and ac-dc dehydration, is used in a large number the oil field water content less than 30%, the dehydrating of crude oil that salinity is low.If water content is higher than 30%, then form easily the water chain between the electrode, cause the electric field that collapses, even can't drop into; And the high crude oil of salinity, insulating property are poor, also cause easily the electric field that collapses.Height is moisture so conventional apparatus for electrodewatering can not adapt to, the crude Treatment of high salinity.Be higher than 30% crude oil for water content, the oil field adopts generally that electricity---chemical mode dewaters, and both adds emulsion splitter with triphase separator first crude oil is carried out predrainage, with moisture the dropping in 10% in the crude oil; Carry out second dehydration with conventional electrical dehydrator again, moisture in the crude oil dropped to 0.2% rear output; As long as the oil-containing in the sewage is lower than 0.1%, enters waste disposal plant and process again just can discharge.
The utility model content
The utility model provides a kind of digitizing electrical oil dewatering water control system, can process high moisture (moisture 95% the crude oil that reaches), high salinity and the relatively poor dehydrating of crude oil of insulating property, and level of automation is high, pulse voltage amplitude, frequency and duty cycle adjustment precision are high, regulation range is wide, less energy-consumption, low harmonic wave.
For this reason, adopt following technical scheme: a kind of digitizing electrical oil dewatering water control system, dehydrating of crude oil tank body and dehydration power supply are arranged, it comprises that also based on the control device of industrial control computer PCC and described dehydration power supply be high pressure medium-frequency pulse power supply; Should based on control device of industrial control computer PCC by adjustment and control to the pulsed voltage of described high pressure medium-frequency pulse power supply, electric current, frequency, dutycycle, realize the Digital Control of crude oil electric dewatering process.
Described high pressure medium-frequency pulse power supply comprises wave filter, I and II filtering circuit, commutating circuit, inversion circuit, high pressure medium-frequency pulse transformer; Its annexation is: the three-phase 380V ac signal of input at first carries out further harmonic through entering first-level filtering ripple loop after the wave filter filtering process, enter afterwards the three phase full bridge commutating circuit and obtain the adjustable d. c. voltage signal of voltage, this d. c. voltage signal enters the secondary filter loop carry out strong filtering after, enter the low-voltage alternating-current pulse signal that inversion circuit becomes frequency and variable duty ratio, this low-voltage alternating-current pulse signal boosts by high pressure medium-frequency pulse transformer and is amplitude, frequency, the high-voltage pulse AC signal that dutycycle is adjustable, silicon stack in transformer puts on the pole plate in the described dehydrating of crude oil tank body after carrying out the positive negative pulse stuffing intercepting.
Connect high precision between described inversion circuit and the high pressure medium-frequency pulse transformer, conversion time is to be the high speed detection module of Hall current transmitter and the 10 μ s of 5 μ s the time of response.
Described first-level filtering wave circuit comprises three-phase alternating current reactance device and electric capacity; Be attempted by respectively AB, BC, the CA leading-out terminal of reactor after the in twos parallel connection of electric capacity.
Described secondary filter circuit comprises two direct current reactors and a plurality of electric capacity; A plurality of electric capacity are attempted by respectively between leading-out terminal DC+, the DC-of described pair of direct current reactor.
Electric capacity is large value capacitor in the described secondary filter circuit.
Described Controlling System has the EPA interface.
The utility model can be processed high moisture (moisture 95% the crude oil that reaches), high salinity and the relatively poor dehydrating of crude oil of insulating property, and crude oil water containing is vestige substantially after processing, and can greatly reduce the crude oil water containing expense such as defeated cost and secondary treatment outward.Also can reduce simultaneously the cost of overhaul of output pump and pipeline; And the sewage with oil after processing is less than 50PPM, and 1000 cubic metres of liquid measure power consumptions of every processing have reached purpose efficient, energy-conservation, that dehydrating effect is good, production cost is low less than 48 degree.And whole Controlling System level of automation is high, and pulse voltage amplitude, frequency and duty cycle adjustment precision are high, regulation range is wide, less energy-consumption, low harmonic wave.
Description of drawings
Fig. 1 is the structured flowchart of the utility model high pressure medium-frequency pulse power supply;
Fig. 2 is that high pressure medium-frequency pulse transformer primary side lateral vein of the present utility model rushes the double frequency synoptic diagram;
Fig. 3 is the utility model high pressure medium-frequency pulse transformer secondary side positive pulse double frequency synoptic diagram;
Fig. 4 is the utility model high pressure medium-frequency pulse transformer secondary side negative pulse double frequency synoptic diagram;
Fig. 5 is the structural representation of the first-level filtering wave circuit of the utility model high pressure medium-frequency pulse power supply;
Fig. 6 is the structural representation of the secondary filter circuit of the utility model high pressure medium-frequency pulse power supply;
Fig. 7-1,7-2,7-3 are the utility model system control flow chart.Wherein 3 of A, the B among Fig. 7-1, C are corresponding to the corresponding points among Fig. 7-2; D point among Fig. 7-2 is corresponding to the corresponding points among Fig. 7-3.
Embodiment
Below by Analysis on Mechanism, the aspects such as field experiment effect are described in further detail the utility model.
Analysis on Mechanism of the present utility model:
When crude oil emulsion dewatered in electric field, the load characteristic of emulsion was capacitive load.Adopt conventional electro-dewatering method, the voltage that frequency is distributed on the milk sap when low is very low, and voltage increases when frequency increases, and voltage is gradually constant when frequency increases to certain value.When adopting medium-frequency pulse, apply the moment of medium-frequency pulse, voltage is by capacitance profile, and along with continuing of time, voltage is pressed distribution of resistance: when frequency was low, the voltage that is distributed on the milk sap was little, and electrical forces is diminished; When frequency was very high, the capacitor charge and discharge effect that milk sap forms was bad, and water droplet can not respond the variation of external electric field well, and dehydrating effect is also bad.
Electrical property by milk sap as can be known, any milk sap has its critical breakdown electric field intensity, when the strength of electric field that adds exceeded its critical breakdown electric field intensity, milk sap can be short-circuited; After electric field disappeared, the short circuit meeting disappeared, 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.Therefore, medium-frequency pulse electro-dewatering technology can make the medium-frequency pulse output time less than the short circuit formation time by adjusting frequency and the dutycycle of medium-frequency pulse, and the pitch time of medium-frequency pulse is greater than the short circuit extinction time.That is to say that before the milk sap short circuit formed, medium-frequency pulse had just disappeared, the milk sap short circuit disappears, and insulating property are sent out next pulse after recovering again.This namely high pressure medium-frequency pulse electro-dewatering technology can process the reason of higher moisture, milk sap that insulating property are relatively poor.
The dehydrating of crude oil of high pressure medium-frequency pulse is compared with the conventional crude electro-dewatering, except exchange and dewatering Principle that alternating current-direct current possesses still effective, owing to be intermediate frequency, its oscillation stretching, the coalescent number of times of dipole coalescence and electrophoresis will increase with the number of times of frequency, strengthened breakdown of emulsion intensity, so dewatering speed is fast, treatment capacity is large; Owing to be pulse, its energy is more concentrated, dodges the target practice effect that jumps out, thus breakdown of emulsion and coalescent more thorough, so dewatering efficiency is high; Also owing to be pulse, it has transient voltage is zero condition, has the effect of arc extinguishing waterproof chain, so dewatering system operates more steady and has the little characteristics of power consumption.
By the working mechanism of high pressure intermediate frequency crude oil electric dewatering as can be known, if obtain good crude oil electric dewatering effect and the consumption of low electric energy, key is the cooperation of tank internal electric field size and pulse, and the control of the amplitude of high-voltage pulse, frequency and dutycycle and adjusting, make strength of electric field size and the timed interval be enough to satisfy the effective coalescent sedimentation of particle water, before short-circuit between plates is formed, strength of electric field weakens, short circuit can't be formed, system can smooth running when guaranteeing that the electro-dewatering high water-content crude oil enters electricity and takes off device, and obtains good dehydrating effect.This has just proposed very high requirement to manufacturing and designing of battery lead plate in high pressure medium-frequency pulse producer, automatic control protective system, pulse transformer and the tank.Simultaneously in order to guarantee the water standing sedimentation behind the breakdown of emulsion, control water-oil interface can not have large fluctuation.
Of the present utility model theing contents are as follows:
With reference to Fig. 1, a kind of digitizing electrical oil dewatering water control system has dehydrating of crude oil tank body 8, high pressure medium-frequency pulse power supply to reach the control device based on industrial control computer PCC; Described high pressure medium-frequency pulse power supply comprises wave filter 1, I and II filtering circuit 2,4, commutating circuit 3, inversion circuit 5, high pressure medium-frequency pulse transformer 7; Its annexation is: the three-phase 380V ac signal of input at first carries out further harmonic through entering first-level filtering ripple loop after the wave filter filtering process, enter afterwards the three phase full bridge commutating circuit and obtain the adjustable d. c. voltage signal of voltage, this d. c. voltage signal enters the secondary filter loop carry out strong filtering after, enter the low-voltage alternating-current pulse signal that inversion circuit becomes frequency and variable duty ratio, this low-voltage alternating-current pulse signal boosts by high pressure medium-frequency pulse transformer and is amplitude, frequency, the high-voltage pulse AC signal that dutycycle is adjustable, silicon stack in transformer puts on the pole plate in the described dehydrating of crude oil tank body after carrying out the positive negative pulse stuffing intercepting.
Connect high precision between described inversion circuit and the high pressure medium-frequency pulse transformer, conversion time is to be the high speed detection module 6 of Hall current transmitter and the 10 μ s of 5 μ s the time of response.
With reference to Fig. 5, described first-level filtering wave circuit comprises a three-phase alternating current reactance device and 6 electric capacity; Be attempted by respectively AB, BC, the CA leading-out terminal of reactor after the in twos parallel connection of electric capacity.
With reference to Fig. 6, described secondary filter circuit comprises two direct current reactors and 12 electric capacity; 12 electric capacity all are attempted by between leading-out terminal DC+, the DC-of described pair of direct current reactor.These 12 large value capacitors that electric capacity is 450V, 10000uF.
System of the present utility model control flow is as follows:
With reference to Fig. 7-1,7-2, main task flow process figure:
1, connects the control power supply;
2, the control computer carries out self check: if fault alarm is arranged and wait the pending fault eliminating; Self check is normally carried out next step;
3, device and loop are detected: if fault is arranged, show fault content and warning, locking pulse output and halt system operation wait pending fault to get rid of; Self check is normally carried out next step;
4, device checks: device pressure, temperature, water-oil interface, if fault is arranged, demonstration fault content is also reported to the police, and locking pulse output and halt system operation wait the pending fault eliminating; Self check is normally carried out next step;
5, set the operation electrical parameter: pulse amplitude voltage, pulse-repetition f1 and f2, pulse duty factor, pulsed current, water-oil interface etc.;
6, detecting master loop closes a floodgate;
7, detecting operational mode selects: if pattern is for automatically then calling in automatic operating parameter; If pattern is for manually then calling in manual operating parameter;
8, check Rational Parameters: if parameter is then carried out next step in scope, otherwise enter next step after adjusting parameter
9, detection system start and stop instruction;
10, start-up system: system triggers respectively subtask 1, subtask 2, subtask 3 after starting, and returns for the 2nd step.
With reference to Fig. 7-3, subtask 1 schema
1, interim parameter adjustment: check subtask 2 adjusting dutycycle requirements, if require to reduce dutycycle, then dutycycle is pressed 1ms and reduce by 1% reduction dutycycle, subtask 2 still requires to reduce dutycycle when dutycycle is reduced to 20%, the speed of then pressing 1ms rising 0.1Hz increases frequency, carries out next step; If require to recover raw parameter without regulating, carry out next step;
2, trigger double-frequency pulse;
3, detect pulse actual magnitude voltage, frequency f 1 and f2, dutycycle;
4, compare pulse actual magnitude voltage and set(ting)value, revise the conduction angle of thyristor, return the 1st step of subtask 1;
With reference to Fig. 7-3, subtask 2 schemas
1, compares pulse actual current and setting electric current;
If 2 pulse actual currents are more than or equal to setting 1.5 times in electric current, then 1 send and regulate the dutycycle requirement to the subtask;
If 3 pulse actual currents less than 2 times, start dosing pump more than or equal to setting 1.2 times in electric current
If 4 pulse actual currents then stop dosing pump less than or equal to setting 1.2 times in electric current.
With reference to Fig. 7-3, subtask 3 schemas
1, detects the water-oil interface actual value
2, compare water-oil interface actual value and set(ting)value;
If 3 water-oil interface actual values are less than the water-oil interface actual value, 1s increases valve and increases valve opening 1%; If the water-oil interface actual value is greater than the water-oil interface actual value, 1s increases valve and reduces valve opening 1%; If the water-oil interface actual value equals the water-oil interface actual value, then keep original valve opening; Return the 1st step of subtask 3;
The detailed description of the utility model effect:
1, power supply of the present utility model is the two electric fields of AC/DC+double-frequency pulse power supply: at first by the adjusting of thyristor fully controlled bridge rectifier bridge setting pulse voltage spoke value, IGBT two-phase inverter bridge setting pulse frequency and dutycycle, produce voltage magnitude, frequency, dutycycle all at the alternating-current pulse that changes, supply with the primary winding coils of high pressure medium-frequency pulse transformer.The double-frequency pulse technology appears at the signal of pulse transformer primary winding coils side, voltage waveform herein is that the pulse of f1 forms by a series of frequencies, but meanwhile the amplitude of this pulse signal changes (f2 is also referred to as pulse amplitude voltage and adjusts frequency) with frequency f 2 again.Pulse transformer is elevated to input voltage is enough to produce effectively coalescent degree of particle water, and then the voltage of Secondary Winding coil sides is intercepted by the pulse that silicon stack is similar to the two electric fields of AC/DC, and the DC voltage of electric field that produces can reach 60KV.
Find that through test pulse-repetition f1, the pulse amplitude voltage that the applies electric field parameters such as f2, maximum amplitude, minimum amplitude of adjusting frequency will directly have influence on dehydrating effect.Therefore not only greatly improve the processing efficiency of crude oil, reduce electric energy loss based on the two electric fields of AC/DC of the power generation of industrial control computer PCC control+double-frequency pulse technology; And by further pulse double frequency adjusting, height is moisture to reach, high salinity crude oil enters electric field and can not cause the electric field that collapses, and reduces device to the temperature requirement of medium.With reference to Fig. 2,3,4.It is 0.01Hz to 10Hz double-frequency pulse for 500Hz to 3000Hz, f2 that this power supply can produce frequency f 1, pulse duty factor by 20-80% stepless arbitrarily adjustable, pulse voltage amplitude is adjustable from 3KV to 36KV, pulsed current reaches 0-6A, can arrange arbitrarily and adjust.
2, adopt the harmonic suppressing method that strengthens: with reference to Fig. 5, Fig. 6, because the dehydrating of crude oil for different densities, viscosity, required pulse-repetition, dutycycle and amplitude are different, and pulse-repetition, dutycycle and amplitude are frequently adjusted in the operational process, so the crude oil electric dewatering pulse power produces very large harmonic pollution electrical network, so this power acquisition double-smoothing technology, and adopt the three phase full bridge rectification.(adopt U.S. emerald green 2292 power quality analyzers to measure) after testing, behind the employing double-smoothing, the harmonic wave factor when the pulse power is worked is 9.2%, is low harmonic pulse power supply.
3, quick perfect digital control program: directly adopt industrial computer PCC as the control core of power supply, the failure testing of each device of power supply (is exchanged the temperature of reactor and two direct current reactors, the IGBT module failure, the quick-acting fuse fault, the opening and closing state of main switch, volts DS, galvanic current, the power pulse electric current, the temperature of pulsed voltage and skid-mounted unit, pressure, water-oil interface etc. detect), the voltage magnitude of pulse, frequency, dutycycle is directly controlled by drive plate, when water chain formation or the increase of puncture of insulation electric current, in 5ms～10ms, finish the voltage magnitude of pulse, frequency, dutycycle is adjusted, guarantee high moisture, high salinity or enter the dehydration sledge electric field that do not collapse through the polynary crude oil of adopting the relatively poor milk sap of insulating property that drives is dewatered equipment and is not collapsed electric field under the crude oil quality condition of complexity.Result of field running shows, the crude oil water content that enters the electrical oil dewatering hydroskis reaches 92% when above, the device normal operation.And Site Detection signal and field control signal, carry out digital communication to reduce controller to on-the-spot cable by fieldbus explosion-proof tank and CAN bus and controller, improve system rejection to disturbance, the intensifier reliability of operation.
4, the master mode of less energy-consumption: powerful detectivity, computing power and the controllability of performance industrial computer PCC, pulse voltage amplitude, frequency, duty specific energy are controlled fast and accurately.Range of frequency is 500Hz～3000Hz, and the frequency adjustment precision is 0.01Hz; The pulse amplitude scope is 3KV～36KV, and the pulse amplitude sharpness of regulation is 1V; The pulse duty factor scope is 10～80%, and the pulse duty factor sharpness of regulation is 130ns; Can be dehydrating of crude oil sledge dewatering electric field provides breakdown of emulsion required specific double-frequency pulse, save electric energy, the mixed liquid power consumption of moisture 50% profit of every processing 2000 sides is spent less than 100, power consumption very little (the mixed liquid power consumption of moisture 25% profit of every processing 2000 sides of conventional apparatus for electrodewatering is greater than 1000 degree).
5, the process control pattern of low-cost, high-environmental: power supply arranges the fast current detection, and when electric current moment increased to a certain value, system automatically dutycycle, amplitude voltage and the frequency of regulating impulse carried out step-down, falls to flow and move.We find in the operational process that at the scene medium-frequency pulse electro-dewatering equipment can not add emulsion splitter and dewater, and does not have the interference of emulsion splitter, and breakdown of emulsion is more thorough, the water oil-containing of deviating from lower (less than 50ppm).But medium-frequency pulse electro-dewatering equipment does not add the emulsion splitter operation for a long time, progressively forms the middle layer on water termination, causes electric current progressively to increase.So pulsed current in power supply control survey operation, select the high speed detection module of Hall current transmitter and the 5ms～10ms of 100ms, the variation of judging electric current is that water chain (or puncture of insulation) causes or the middle layer produces, when electric current 1.2Ie＜I＜1.5Ie (Ie power supply operation rated current), the dosing of output relay action control dosing pump.On-the-spot operation shows only to be needed automatically to add emulsion splitter 20min every 4 ~ 6 hours, for the excessive layer in the centre on the water-oil interface of eliminating thickening, greatly reduces the injected volume (saving the consumption 80% of emulsion splitter) of emulsion splitter.Add with do not add emulsion splitter to electric current, process after the effect of crude oil water containing and sewage with oil see table 1～table 3 for details.Add emulsion splitter and do not add emulsion splitter dehydration simultaneous test, carry out under the following conditions:
Medium: crude oil water containing content is about 70%, pressure 0.1 MPa～0.3MPa, medium temperature 〉=60
oC, treatment capacity 50～52m
3/ h, specific gravity of crude (envrionment temperature 20 ℃ time) 0.852g/cm
3, the proportion of viscosity 48.2CST, water (envrionment temperature 20 ℃ time): 1.051g/cm
3In voltage 2000V, frequency 2000Hz, dutycycle 50%.
Table 1 current time change list
Synopsis one (adding emulsion splitter)
Synopsis two (not adding emulsion splitter)
6, networking mode flexibly: this Controlling System is stayed the EPA interface, can realize Long-distance Control by local area network easily, or be connected with the DCS of joint station.
7, simple to operate, directly perceived: on the housing door of this Controlling System Human machine interface is housed, the operation of electrical dehydrator carries out at touch-screen, and key operation.
8, operation is convenient: electricity takes off operating parameter and all can monitor at Human machine interface.
9, safeguard simply: electricity takes off operation troubles and all can show at Human machine interface, is convenient to safeguard.
10, service data of the present utility model:
Below in Tarim Oilfield 161 turn the station service data be explained.
Tarim Oilfield 161 turns the characteristics that station crude oil has high moisture, high salinity, its oil density 0.852g/ cm3,
Crude oil water containing 〉=70%, crude oil salinity are very high, electric conductivity is high; The saliferous of water is heavy, especially the good conductor of electricity.To this, use traditional alternating-current dehydration or alternating current-direct current dewatering, all can't effectively implement.Still adopt the large tank decanter type of interpolation emulsion splitter dewatering process so 161 turn station dehydrating of crude oil.This technique not only will consume a large amount of emulsion splitters, also will consume a large amount of electric energy in carrying wet oil, causes production cost high.
Adopt the crude oil electric dewatering skid-mounted unit of this Controlling System, turn the index of station operation at Tarim Oilfield 161;
Treatment capacity is 2000M
3/ d;
The treatment media water content can be up to 90%;
Water in oil after the processing is vestige substantially;
Sewage with oil after the processing is less than 50PPM;
Every processing 1000M
3The liquid measure power consumption is less than 48 degree;
Tarim Oilfield 161 turns the 72 hours industrial operating index in station and sees Table 4.
And the electrical oil dewatering water quality standard SY/T0045-1999 " crude oil electric dewatering design specifications " that China promulgated in 1999 does following regulation to the electro-dewatering operating index:
3.0.1 entering the crude oil water content of electrical dehydrator should not be greater than 30%;
3.0.2 its moisture index of regulation dewatered oil should be less than or equal to 0.5%;
3.0.3 regulation, the oleaginousness of the sewage of deviating from from electrical dehydrator should not be greater than 0.5%.
8.0.1 the emulsion splitter that electric dewatering apparatus for crude oil uses is answered its kind of selection, consumption, adding point and the adding mode of science.
8.0.5 the adding mode of emulsion splitter should adopt the dosing pump of capable of regulating flow quantity to add quantitatively, continuously, uniformly production system.
Obviously, indices of the present utility model is higher than the GB requirement far away.
72 hours industrial operating index table look-ups of table 4
Claims (7)
1. a digitizing electrical oil dewatering water control system has dehydrating of crude oil tank body and dehydration power supply, and it is characterized in that: it comprises that also based on the control device of industrial control computer PCC and described dehydration power supply be high pressure medium-frequency pulse power supply; Should based on control device of industrial control computer PCC by adjustment and control to the pulsed voltage of described high pressure medium-frequency pulse power supply, electric current, frequency, dutycycle, realize the Digital Control of crude oil electric dewatering process.
2. a kind of digitizing electrical oil dewatering water control system according to claim 1, it is characterized in that: described high pressure medium-frequency pulse power supply comprises wave filter, I and II filtering circuit, commutating circuit, inversion circuit, high pressure medium-frequency pulse transformer; Its annexation is: the three-phase 380V ac signal of input at first carries out further harmonic through entering first-level filtering ripple loop after the wave filter filtering process, enter afterwards the three phase full bridge commutating circuit and obtain the adjustable d. c. voltage signal of voltage, this d. c. voltage signal enters the secondary filter loop carry out strong filtering after, enter the low-voltage alternating-current pulse signal that inversion circuit becomes frequency and variable duty ratio, this low-voltage alternating-current pulse signal boosts by high pressure medium-frequency pulse transformer and is amplitude, frequency, the high-voltage pulse AC signal that dutycycle is adjustable, silicon stack in transformer puts on the pole plate in the described dehydrating of crude oil tank body after carrying out the positive negative pulse stuffing intercepting.
3. a kind of digitizing electrical oil dewatering water control system according to claim 2 is characterized in that: connect high precision between described inversion circuit and the high pressure medium-frequency pulse transformer, conversion time is to be the high speed detection module of Hall current transmitter and the 10 μ s of 5 μ s the time of response.
4. a kind of digitizing electrical oil dewatering water control system according to claim 2, it is characterized in that: described first-level filtering wave circuit comprises three-phase alternating current reactance device and electric capacity; Be attempted by respectively AB, BC, the CA leading-out terminal of reactor after the in twos parallel connection of electric capacity.
5. a kind of digitizing electrical oil dewatering water control system according to claim 2 is characterized in that: described secondary filter circuit comprises two direct current reactors and a plurality of electric capacity; A plurality of electric capacity are attempted by respectively between leading-out terminal DC+, the DC-of described pair of direct current reactor.
6. a kind of digitizing electrical oil dewatering water control system according to claim 5, it is characterized in that: electric capacity is large value capacitor in the described secondary filter circuit.
7. a kind of digitizing electrical oil dewatering water control system according to claim 1, it is characterized in that: described Controlling System has the EPA interface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220562924.7U CN202849338U (en) | 2012-10-30 | 2012-10-30 | Digital electric dehydrating control system for crude oil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220562924.7U CN202849338U (en) | 2012-10-30 | 2012-10-30 | Digital electric dehydrating control system for crude oil |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876355A (en) * | 2012-10-30 | 2013-01-16 | 兰州正邦自动化成套设备有限公司 | Digitalized crude oil electric-dehydration control system and control method |
| RU198224U1 (en) * | 2019-11-19 | 2020-06-25 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный энергетический университет" | DEVICE FOR DEWATING WATER-OIL EMULSIONS |
-
2012
- 2012-10-30 CN CN201220562924.7U patent/CN202849338U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876355A (en) * | 2012-10-30 | 2013-01-16 | 兰州正邦自动化成套设备有限公司 | Digitalized crude oil electric-dehydration control system and control method |
| RU198224U1 (en) * | 2019-11-19 | 2020-06-25 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский государственный энергетический университет" | DEVICE FOR DEWATING WATER-OIL EMULSIONS |
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