CN111647420A - Electromagnetic synergistic oil-water separation device and method - Google Patents
Electromagnetic synergistic oil-water separation device and method Download PDFInfo
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G33/00—Dewatering or demulsification of hydrocarbon oils
- C10G33/02—Dewatering or demulsification of hydrocarbon oils with electrical or magnetic means
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Abstract
The embodiment of the invention provides an oil-water separation device with electromagnetic synergistic effect, which comprises an oil-water separation main body and an electromagnetic power supply, wherein one end of a medium-temperature oscillator of the oil-water separation main body is connected to a dynamic constant-temperature oil bath through a high-temperature oil pump, and the other end of the medium-temperature oscillator is connected to the other end of the dynamic constant-temperature oil bath; the dehydration tank is fixed at the bottom of the dynamic constant-temperature oil bath; the top cover is fixed at the top end of the dewatering tank; the excitation coils are symmetrically arranged on two sides of the dehydration tank; the high-voltage electrode is fixed inside the dehydration tank and penetrates through the top cover; an alternating current power supply in the electromagnetic power supply respectively allocates alternating current signals generated by the alternating current power supply to the electric field generating unit and the magnetic field exciting unit through the voltage regulating unit; the output of the electric field generating unit is connected with the high-voltage electrode, and the output of the magnetic field exciting unit is connected with the exciting coil. The invention improves the demulsification and dehydration effect and dehydration efficiency of crude oil, reduces the using amount of the demulsifier, optimizes the volume of the electromagnetic power supply, has compact structure and high safety, and has guiding significance for offshore oilfield exploitation.
Description
Technical Field
The invention relates to the technical field of multiphase separation of an oil-gas gathering and transportation system, in particular to an oil-water separation device and method under electromagnetic synergistic effect.
Background
The center of oil field gathering and processing is a united station, and the dehydrator plays a crucial role in the processing process of the transfer station. The dehydration measure generally adopted at present is that a demulsifier is added into an electric field, and the method has the strongest treatment capability and the highest efficiency.
Although the crude oil treatment process is more developed, the following problems still exist: the water content of the crude oil settled by the settling tank is still very high, and the emulsified water is abundant, so that an electric field is not easy to establish after the crude oil enters the electric dehydrator, a penetrating water chain is formed between electrodes to cause breakdown, the dehydration current is large, and the dehydration efficiency of the dehydrator in the oil field combined station is reduced. The high-viscosity crude oil treated by the treatment process has great influence on the production and transportation of the crude oil, and can not meet industrial requirements and export indexes.
The viscosity of crude oil is an important factor influencing the dehydration efficiency and the dehydration rate of the crude oil, the excessive viscosity of the crude oil can reduce the coalescence probability of water drops in the crude oil, paraffin, colloid and asphaltene are main intrinsic factors influencing the viscosity of the crude oil, and the paraffin, the colloid and the asphaltene are dissolved in the crude oil in a colloid state. Because the crude oil is a diamagnetic substance, when the crude oil is subjected to the action of an external magnetic field, the spin magnetic moment of electrons in alkane molecules is slightly changed relative to the original orbit under the action of the magnetic field to generate an induced magnetic moment, the induced magnetic moment is instantaneous, the directional arrangement of paraffin molecule crystals is damaged, the wax crystals are not easy to gather, the wax crystals are prevented from being generated, and the wax precipitation effect is achieved; meanwhile, the magnetic conduction distance is changed into swinging motion when the magnetic field leaves, intermolecular force for destroying crude oil colloid and asphaltene is weakened, the intermolecular force is loosened, and the dispersed phase rather than the association phase is dissolved in the crude oil, so that the viscosity of the crude oil is reduced. Along with the reduction of the viscosity of the crude oil, the mutual coalescence and sedimentation probability of water molecules in the crude oil is increased, the magnetic field has small action on the water molecules, and the action on the viscosity reduction of the crude oil can last for a period of time, so that the magnetic field can act on the viscosity reduction of the crude oil, and the dehydration efficiency of the crude oil is improved.
In recent years, with the development of magnetic field technology, the magnetic field viscosity reduction technology is gradually applied to the demulsification and dehydration of crude oil, and has the advantages of simple equipment structure and low manufacturing cost, but when the crude oil with low water content is treated, the magnetic field has small effect on water drops in the crude oil. In addition, due to the limited environment in offshore oil field production, the high efficiency, compactness and safety of the dehydrator are key technologies affecting the efficiency and production of oil treatment. The existing dehydration power supply can only provide high voltage, most of the high voltage power supplies have low power, so that the current is low, and the high voltage power supplies cannot be used as a magnetic field generation power supply, so that the design of an oil-water separation device with electromagnetic synergistic effect is particularly important.
Disclosure of Invention
The embodiment of the invention provides an oil-water separation device and method with electromagnetic synergistic effect, through orthogonal experiments and a machine learning algorithm, the dehydration rate can be effectively predicted according to various influence factors, the influence of the various influence factors on the oil-water separation effect can be explored by taking the dehydration rate as an evaluation standard, the device based on the method can simultaneously generate excitation current required by a magnetic field and high voltage required by an electric field, the viscosity and the water content of crude oil are reduced by using the magnetic field and the electric field combined field under the condition of zero addition of a demulsifier, and efficient demulsification and dehydration are realized.
On one hand, the embodiment of the invention also provides an oil-water separation device with electromagnetic synergistic effect, which comprises an oil-water separation main body and an electromagnetic power supply, wherein,
the oil-water separation main body comprises a constant temperature oscillator, a high temperature oil pump, a dynamic constant temperature oil bath, an excitation coil, a high voltage electrode, a dehydration tank, a sealing washer and a top cover; wherein the content of the first and second substances,
one end of the temperature oscillator is connected with one end of the dynamic constant-temperature oil bath through a high-temperature oil pump, and the other end of the temperature oscillator is connected with the other end of the dynamic constant-temperature oil bath;
the dehydration tank is fixed at the bottom of the dynamic constant-temperature oil bath through a sealing washer;
the top cover is fixed at the top end of the dewatering tank through a bolt;
the excitation coils are respectively and symmetrically arranged on the left side and the right side of the dehydration tank in parallel;
the high-voltage electrode is fixed in the dehydration tank through the electrode clamping plate and penetrates through the top cover;
the electromagnetic power supply comprises an alternating current power supply, a voltage regulating unit, an electric field generating unit, a magnetic field exciting unit and a power supply box body; wherein the content of the first and second substances,
the alternating current power supply respectively allocates alternating current signals generated by the alternating current power supply to the electric field generating unit and the magnetic field exciting unit through the voltage regulating unit;
the alternating current power supply, the voltage regulating unit, the electric field generating unit and the magnetic field exciting unit are respectively arranged in the power supply box body;
the output end of an electric field generating unit of the electromagnetic power supply is connected with the high-voltage electrode through a high-voltage bushing, and the output end of a magnetic field exciting unit of the electromagnetic power supply is connected with the exciting coil.
In some optional embodiments, the magnetic field excitation unit includes a first rectification circuit, a first filter circuit and a first inverter circuit, and the magnetic field excitation unit sequentially passes through the first rectification circuit, the first filter circuit and the first inverter circuit to transmit a signal, which is allocated to the magnetic field excitation unit, by the voltage regulation unit to the excitation coil;
the output signal of the magnetic field excitation unit is an adjustable square wave pulse signal.
In some optional embodiments, the electric field generating unit comprises a step-up transformer, a second rectifying circuit, a second filtering circuit, a second inverting circuit and a third rectifying circuit,
the electric field generating unit generates a first electric field output signal by the alternating current signal regulated by the voltage regulating unit through the step-up transformer and outputs the first electric field output signal to the high-voltage electrode;
the electric field generating unit enables the alternating current signals distributed by the voltage regulating unit to sequentially pass through the second rectifying circuit, the second filter circuit, the second inverter circuit and the booster transformer to generate second electric field output signals, and the second electric field output signals are output to the high-voltage electrode;
the second electric field output signal generated by the electric field generating unit passes through the third rectifying circuit to generate a third electric field output signal, and the third electric field output signal is output to the high-voltage electrode.
In some optional embodiments, the first electric field output signal of the electric field generating unit is an adjustable high voltage alternating current signal, and/or the second electric field output signal of the electric field generating unit is an adjustable high voltage square wave pulse signal, and/or the third electric field output signal of the electric field generating unit is an adjustable high voltage direct current signal;
the first electric field output signal, the second electric field output signal, and the third electric field output signal of the electric field generating unit may be output in combination or simultaneously.
In some optional embodiments, the electromagnetic power supply further comprises a measuring device, and the measuring device is installed in the power supply box and is connected to each output loop of the magnetic field excitation unit and the electric field generation unit.
In some optional embodiments, the electromagnetic power supply further comprises a control unit, an overheat protection circuit, a plurality of manipulation buttons, a plurality of indicator lights, and a data display, wherein,
the control unit and the overheat protection circuit are arranged inside the power supply box body, and the plurality of control buttons, the plurality of indicator lamps and the data display are respectively arranged on the surface of the power supply box body.
In some optional embodiments, the electromagnetic synergistic oil-water separation device comprises a plurality of high-voltage electrodes, wherein each high-voltage electrode comprises a plurality of electrode plates, and the plurality of electrode plates are connected from top to bottom and extend into the dehydration tank.
In another aspect, an embodiment of the present invention provides an electromagnetic synergistic oil-water separation method, including:
determining a plurality of influence factors influencing the oil-water separation effect under the electromagnetic synergistic effect;
respectively carrying out combined action sequence experiments of a magnetic field and an electric field according to the oil-water separation device with electromagnetic synergistic action under the condition of a plurality of influence factors, and selecting a sequence experiment with better action effect to carry out oil-water separation;
designing an orthogonal experiment, selecting experiment factors of the orthogonal experiment according to the determined multiple influence factors, and determining a corresponding dehydration rate;
and analyzing the data of the orthogonal experiment by using a machine learning algorithm, and predicting the dehydration rate through experimental factors of the orthogonal experiment.
In some alternative embodiments, the plurality of influencing factors include magnetic field frequency, magnetic field strength, magnetic field application time, electric field strength, electric field frequency, initial water cut, and ambient temperature.
In some optional embodiments, the orthogonal experiment selects 6 influencing factors as experimental factors, and the machine learning algorithm is a BP neural network algorithm.
The technical scheme has the following beneficial effects: the electromagnetic synergistic oil-water separation device can simultaneously generate exciting current required by a magnetic field and high voltage required by the electric field, output signals can be adjusted, the use is flexible, the structure is simple, efficient demulsification and dehydration are realized under the condition of zero addition of a demulsifier, and through a machine learning algorithm, the dehydration rate can be accurately predicted by utilizing various influence factors, so that the controllability of the dehydration rate of the electromagnetic synergistic oil-water separation device is stronger.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram showing the structure of an electromagnetic synergistic oil-water separation device according to an embodiment of the present invention;
FIG. 2 is a schematic circuit diagram illustrating an electromagnetically collaborative oil water separation apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic diagram showing an electromagnetic power supply surface arrangement of an electromagnetically operated oil-water separator according to an embodiment of the present invention;
FIG. 4 is a graph illustrating the viscosity temperature profile of pretreated crude oil according to one embodiment of the present invention;
fig. 5 is a graph showing dehydration rates of respective oil-water separation processes according to an embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating an electromagnetically synergistic oil-water separation method according to one embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.
The reference numbers illustrate:
1: a constant temperature oscillator; 2: a high temperature oil pump; 3: a dynamic constant temperature oil bath; 4: a field coil; 5: a high voltage bushing; 6: a high voltage electrode; 7: a dehydration tank; 8: a dehydration power supply; 9: an electrode clamp plate; 10: a full-thread bolt; 11: a sealing gasket; 12: a top cover; 13: a source switch indicator light; 14: a power-on button; 15: a power off button; 16: a magnetic field excitation unit turn-on button; 17: a magnetic field excitation unit turn-off button; 18: the magnetic field excitation unit switches the indicator light; 19: an electric field generating unit turn-on button; 20: the electric field generating unit turns off the button; 21: the electric field generating unit turns on an indicator light; 22: an electric field generating unit waveform adjusting knob; 23: a current adjusting knob of the magnetic field excitation unit; 24: a magnetic field excitation unit frequency adjustment knob; 25: an electric field generating unit frequency adjusting knob; 26: an electric field generating unit voltage adjusting knob; 27: displaying the voltage of the magnetic field excitation unit; 28: frequency display of the magnetic field excitation unit; 29: displaying the voltage of the electric field generating unit; 30: displaying the current of the magnetic field excitation unit; 31: frequency display of the electric field generating unit; 32: the electric field generates a unit current display.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For better understanding of the present invention, the electromagnetic synergistic oil-water separation device and method provided by the embodiment of the present invention are described in detail below with reference to fig. 1 to 6. It should be noted that these examples are not intended to limit the scope of the present disclosure.
Fig. 1 is a schematic structural view showing an electromagnetic synergistic oil-water separation device according to an embodiment of the present invention.
An electromagnetic synergistic oil-water separation device provided by an embodiment of the invention can comprise: an oil-water separation main body and an electromagnetic power supply 8, wherein,
the oil-water separation main body comprises a constant temperature oscillator 1, a high temperature oil pump 2, a dynamic constant temperature oil bath 3, an excitation coil 4, a high voltage electrode 6, a dehydration tank 7, a sealing washer 11 and a top cover 12; wherein the content of the first and second substances,
one end of the temperature oscillator 1 is connected to one end of the dynamic constant temperature oil bath 3 through the high temperature oil pump 2, and the other end of the temperature oscillator 1 is connected to the other end of the dynamic constant temperature oil bath 3.
Specifically, a liquid inlet and a liquid outlet are respectively arranged at the upper part and the bottom part of the constant temperature oil bath 3, wherein the liquid inlet is connected with one end of the constant temperature oscillator 1 through the high temperature oil pump 2, the liquid outlet is directly connected with the other end of the constant temperature oscillator 1, and the insulating oil heated by the high temperature oil pump 2 circulates in the constant temperature oscillator 1 and the constant temperature oil bath 3 so as to maintain the constant temperature in the oil-water separation process.
The dewatering tank 7 is fixed to the bottom of the dynamic constant temperature oil bath 3 by a sealing washer 11. Specifically, the dehydration tank 7 is connected with the dynamic constant temperature oil bath 3 by a bolt 10, and a sealing gasket 11 is arranged on the middle pad for preventing the dehydration tank 7 from electric leakage to electrify the dynamic constant temperature oil bath 3. Specifically, the dehydration tank 7 may be a vertical dehydration tank, and the tank body of the dehydration tank 7 may be a stainless steel tank body.
The top cover 12 is fixed to the top end of the dewatering tank 7 by bolts. Specifically, the top cover 12 is connected with the dewatering tank 7 by bolts and is a detachable top cover.
The excitation coils 4 are respectively arranged on the left side and the right side of the dewatering tank 7 in parallel and symmetrically. Specifically, two excitation coil 4 arrange respectively in the left and right sides of dewatering tank 7 to mutual symmetry parallel arrangement, wherein, excitation coil 4 material can be diameter 1.6mm high temperature resistant enameled wire, and the temperature that can bear is 180 ℃, can adopt oil forbidden glass insulating cloth to insulate between excitation coil 4 and the dewatering tank 7.
The high voltage electrode 6 is fixed inside the dewatering tank 7 through an electrode clamping plate 9 and penetrates through the top cover 12. Specifically, the high voltage electrode 6 is arranged in the middle of the dewatering tank 7 from top to bottom and is fixed by an electrode clamping plate 9, wherein the electrode clamping plate 9 can be made of polytetrafluoroethylene material, and the function of the electrode clamping plate is to prevent the edge effect of the electrode. The high voltage electrode 6 and the electrode clamping plate 9 can be freely detached from the top cover 12.
The electromagnetic power supply 8 comprises an alternating current power supply, a voltage regulating unit, an electric field generating unit, a magnetic field exciting unit and a power supply box body; wherein the content of the first and second substances,
the alternating current power supply respectively allocates alternating current signals generated by the alternating current power supply to the electric field generating unit and the magnetic field exciting unit through the voltage regulating unit;
the alternating current power supply, the voltage regulating unit, the electric field generating unit and the magnetic field exciting unit are respectively arranged in the power supply box body;
the output end of the electric field generating unit of the electromagnetic power supply 8 is connected to the high-voltage electrode 6 through the high-voltage bushing 5, and the output end of the magnetic field exciting unit of the electromagnetic power supply 8 is connected to the exciting coil 4. Specifically, the circuit inside the electromagnetic power supply 8 may be divided into two parts, one of which is an electric field generating part and the other of which is a magnetic field generating part, and the two circuits may be relatively independent. The electric field generating unit is connected to a high-voltage electrode 6 through a high-voltage wire, a lead is fixed to the top of the dewatering tank through a high-voltage bushing 5, and the high-voltage bushing 5 plays a role in fixing the electrode. The signal of the magnetic field excitation unit is electrically connected with the excitation coil 4 through a lead, and the lead is welded and fixed at the joint of the lead to prevent the lead from falling off. The excitation coil 4 is made of an enameled copper wire with the diameter of 1.5mm and the heat resistance grade of 180 ℃. The adjusting range of the exciting current of the magnetic field exciting unit is 0-20A, and the adjusting range of the frequency is 0-2000 Hz.
In one embodiment, the magnetic field excitation unit may include a first rectification circuit, a first filter circuit and a first inverter circuit, the magnetic field excitation unit sequentially passes through the first rectification circuit, the first filter circuit and the first inverter circuit transmit a signal, which is obtained by the voltage regulation unit and is applied to the magnetic field excitation unit, to the excitation coil 4, and an output signal of the magnetic field excitation unit may be an adjustable square wave pulse signal. Specifically, as shown in fig. 2, the magnetic field excitation unit is voltage-regulated by the voltage-regulating unit, and then sequentially goes through the first rectification circuit, the first filter circuit and the first inverter circuit to perform waveform conversion to obtain an output signal, wherein the first rectification circuit may be a single-phase bridge type half-controlled rectification circuit, the first filter circuit may be a capacitor filter circuit, and the obtained output signal of the magnetic field excitation unit is connected with the excitation coils 4 on both sides of the dehydration tank 7 to generate a variable frequency magnetic field. The single-phase bridge type semi-controlled rectifying circuit is mainly characterized in that a thyristor is used as a main component, a single-phase alternating current voltage waveform is rectified into a regular waveform by controlling the on-off sequence and the on-off time of the thyristor, then a circuit connected with the rectifying circuit is a capacitor filter circuit, the output waveform of the circuit is direct current according to the size of an adjusting capacitance value, the direct current waveform is inverted into square wave pulse through an inverter circuit, and the duty ratio and the frequency of the high-voltage square wave pulse are adjustable. The signal output by the magnetic field excitation unit can be an excitation square wave pulse current signal, the adjusting range can be 0-20A, the frequency adjusting range can be 0-2000Hz, and the voltage adjusting unit can be a stepless adjustable voltage regulator within the range of 0-220V.
In one embodiment, the electric field generating unit may include a step-up transformer, a second rectifying circuit, a second filtering circuit, a second inverting circuit, and a third rectifying circuit,
the electric field generating unit generates a first electric field output signal by the alternating current signal regulated by the voltage regulating unit through the step-up transformer and outputs the first electric field output signal to the high-voltage electrode 6;
the electric field generating unit generates a second electric field output signal by sequentially passing the alternating current signal regulated by the voltage regulating unit through a second rectifying circuit, a second filter circuit, a second inverter circuit and the booster transformer, and outputs the second electric field output signal to the high-voltage electrode 6;
the second electric field output signal generated by the electric field generating unit passes through the third rectifying circuit to generate a third electric field output signal, and the third electric field output signal is output to the high-voltage electrode 6.
Specifically, the electric field generating unit can generate three different waveforms, wherein one path of signal is subjected to voltage regulation by the voltage regulating unit through the alternating current signal of the power supply, and then can be directly boosted by the boosting transformer to output a first electric field output signal; the other path of signal passes through a second rectifying circuit, a second filter circuit and a second inverter circuit to generate square wave pulse, then is boosted by a booster transformer to output a second electric field output signal, and a part of the second electric field output signal can pass through a third rectifying circuit to output a third electric field output signal. The step-up transformer can be a high-frequency high-voltage step-up transformer, the second rectifying circuit can be a single-phase bridge semi-controlled rectifying circuit, the second filtering circuit can be a capacitor filtering circuit, the third rectifying circuit can be a high-voltage silicon stack rectifying circuit, and the voltage level of the high-voltage silicon stack can be 60kV level. The first electric field output signal, the second electric field output signal and the third electric field output signal are respectively connected with the high-voltage electrode 6 and used for generating a strong electric field in the oil-water separation process.
In one embodiment, the first electric field output signal of the electric field generating unit is an adjustable high voltage alternating current signal, and/or the second electric field output signal of the electric field generating unit is an adjustable high voltage square wave pulse signal, and/or said third electric field output signal of the electric field generating unit is an adjustable high voltage direct current signal. Specifically, the electric field generating unit can also directly convert sinusoidal alternating-current voltage into sinusoidal high-voltage alternating current through the high-frequency step-up transformer, and output high-voltage square-wave pulses which can be output as high-voltage direct current through the third rectifying circuit. The first electric field output signal can be an adjustable high-voltage alternating-current voltage signal with an adjusting range of 0-30kV, the second electric field output signal can be an adjustable high-voltage square wave pulse voltage signal with an adjusting range of 0-30kV, the frequency adjusting ranges of the first electric field output signal and the second electric field output signal can be 0-5kHz, and the third electric field output signal can be an adjustable high-voltage direct-current voltage signal with an adjusting range of-15 kV-15 kV.
In one embodiment, the first electric field output signal, the second electric field output signal, and the third electric field output signal of the electric field generating unit may be output in combination or simultaneously.
In one embodiment, the electromagnetic power supply 8 further comprises a measuring device, which is installed in the power supply box and is connected to each output loop of the magnetic field excitation unit and the electric field generation unit. Specifically, each output waveform loop of the magnetic field excitation unit and the electric field generation unit is connected with a corresponding measuring device for measuring the output voltage and the electric field frequency of the electric field, the exciting current in the magnetic field excitation part and the magnetic field change frequency, and a fluxmeter probe is arranged in the dewatering device for measuring the magnitude of the magnetic induction intensity.
In one embodiment, the electromagnetic power supply 8 may further comprise a control unit, an overheat protection circuit, a plurality of manipulation buttons, a plurality of indicator lights, and a data display, wherein,
the control unit and the overheating protection circuit are arranged inside the power supply box body, the plurality of control buttons, the plurality of indicating lamps and the data display are respectively arranged on the surface of the power supply box body.
The control unit is used for regulating and controlling the output signal of the electromagnetic power supply 8; the overheat protection circuit is used for preventing the electromagnetic power supply 8 from being damaged due to overheat; the plurality of control buttons are used for adjusting output signals of the electromagnetic power supply 8; the plurality of indicator lamps are used for displaying the working state of the electromagnetic power supply 8; the data display is used for displaying the output signal of the electromagnetic power supply 8. Specifically, the control unit is configured to adjust the frequency and duty ratio of the output signal of the magnetic field excitation unit, and the frequency and duty ratio of the first electric field output signal, the second electric field output signal, and the third electric field output signal output by the electric field generation unit, respectively, and only the frequency and duty ratio of the input PWM wave need to be adjusted, so as to obtain the electric field and the magnetic field with corresponding frequency and duty ratio, where the adjustable range of the duty ratio may be 0-45%.
As shown in fig. 3, the electromagnetic power supply 8 may further include a plurality of operation buttons, a plurality of indicator lamps and a data display are disposed on the surface of the power supply box, wherein the plurality of operation buttons, the plurality of indicator lamps and the data display may specifically include a power switch indicator lamp 13, a power on button 14, a power off button 15, a magnetic field excitation unit on button 16, a magnetic field excitation unit off button 17, a magnetic field excitation unit on-off indicator lamp 18, an electric field generation unit on button 19, an electric field generation unit off button 20, an electric field generation unit on indicator lamp 21, an electric field generation unit waveform adjustment knob 22, a magnetic field excitation unit current adjustment knob 23, a magnetic field excitation unit frequency adjustment knob 24, an electric field generation unit frequency adjustment knob 25, an electric field generation unit voltage adjustment knob 26, a magnetic field excitation unit voltage display 27, a magnetic field excitation unit frequency display 28, an electric field generating unit voltage display 29, a magnetic field exciting unit current display 30, an electric field generating unit frequency display 31, and an electric field generating unit current display 32. The parameters of the electric field generating unit and the magnetic field exciting unit can be displayed on the disk surface.
The specific operation mode can be as follows: the excitation coil 4 is connected with the output end of the magnetic field excitation unit, the high-voltage electrode 6 is connected with the output end of the electric field generation unit and the ground wire, then the working alternating current power supply is turned on, the working power supply switch indicator lamp 13 is turned on, the electric field generation unit start button 19 and the magnetic field excitation unit start button 16 are pressed respectively, and the output frequency and the waveform of the required electric field generation unit and the magnetic field excitation unit are adjusted by adjusting the input PWM. And rotating the voltage regulator to respectively regulate the outputs of the electric field generating unit and the magnetic field exciting unit to required amplitudes and starting an oil-water separation process. Specifically, firstly, the prepared crude oil emulsion is subjected to magnetic field pretreatment, the viscosity-temperature curve of the pretreated crude oil emulsion is below the viscosity-temperature curve of crude oil which is not subjected to magnetic field treatment, the viscosity of the crude oil can be well prevented from being increased too fast, and the viscosity-temperature curve of the specifically pretreated crude oil is shown in fig. 4. When the magnetic field and the treatment are carried out, firstly, the power supply start button 14 of the electromagnetic power supply 8 is turned on, then the magnetic field excitation unit start button 16 is turned on, then the magnetic field electromagnetic induction intensity and the magnetic field power supply frequency are adjusted through the magnetic field excitation unit current adjusting knob 23 and the magnetic field excitation unit frequency adjusting knob 24 respectively, and the crude oil is treated for 15 minutes. Then, the magnetic field excitation unit off button 17 is pressed, the electric field generation unit on button 19 is turned on, and the frequency of the applied electric field and the intensity of the electric field are adjusted by the electric field generation unit frequency adjustment knob 25 and the electric field generation unit voltage adjustment knob 26, respectively. The crude oil is treated in an electric field for one hour, and the water content of the crude oil is measured at intervals. In the process of the oil-water separation procedure, if the magnetic field is closed, the voltage regulator connected with the magnetic field excitation unit is reset to zero, and the magnetic field excitation unit turn-off button 17 is pressed. And after all the working procedures are finished, all the voltage regulators are reset to zero, all the turn-off buttons are pressed down, and the test platform is discharged by using the grounding rod.
In this embodiment, the crude oil dehydration step is performed by the combination of the magnetic field and the electric field, and compared with the conventional electric dehydration method, the crude oil temperature processing range is wider, and the specific comparison of the conventional electric dehydration data is shown in fig. 5.
In one embodiment, the electromagnetic synergistic oil-water separation device may comprise a plurality of high voltage electrodes 6, wherein each high voltage electrode 6 may comprise a plurality of electrode plates, and the plurality of electrode plates are connected from top to bottom and extend into the dehydration tank. Specifically, the number of the high voltage electrodes 6 may be two, and one of the high voltage electrodes 6 is a high voltage electrode, and the other high voltage electrode 6 is a ground electrode. The high voltage electrode 6 may be 3, the middle high voltage electrode 6 is a high voltage electrode, and the other two high voltage electrodes 6 are grounding electrodes.
FIG. 6 is a schematic diagram illustrating an electromagnetically synergistic oil-water separation method according to one embodiment of the present invention.
The electromagnetic synergistic oil-water separation method 100 provided by the embodiment of the invention comprises steps 110 to 140.
And step 110, determining a plurality of influence factors influencing the oil-water separation effect under the electromagnetic synergistic action.
Specifically, one of a plurality of influence factors is changed by controlling a variable method, and other influence factors are unchanged, so that the influence of different levels on the oil-water separation effect under the same influence factor is observed, the effect of the electromagnetic synergistic effect is verified, and finally, which variables are influence factors influencing the oil-water separation effect are determined.
In one embodiment, the plurality of influencing factors may include magnetic field frequency, magnetic field strength, magnetic field application time, electric field strength, electric field frequency, initial water cut, and ambient temperature.
And 120, respectively carrying out a combined action sequence experiment of a magnetic field and an electric field according to the oil-water separation device with the electromagnetic synergistic effect under the condition of a plurality of influence factors, and selecting a sequence experiment with a better action effect to carry out oil-water separation.
Specifically, in order to determine the influence of the combined action sequence of the magnetic field and the electric field on the oil-water separation effect, a control variable method is also adopted, one of a plurality of influence factors is changed, under the condition that other influence factors are not changed, two sequence experiments of the magnetic field acting before the electric field and the magnetic field and the electric field acting simultaneously are respectively verified, and the sequence experiment with better action effect is selected for oil-water separation.
And step 130, designing an orthogonal experiment, selecting experimental factors of the orthogonal experiment according to the plurality of determined influence factors, and determining the corresponding dehydration rate.
In one embodiment, the orthogonal experiment selects 6 influencing factors as experimental factors.
Specifically, 6 influencing factors are selected as experimental factors of the orthogonal experiment in the orthogonal experiment, wherein the experimental factors can specifically include electric field intensity, magnetic field frequency, water content, ambient temperature and magnetic field acting time, 5 levels are selected for each factor, and L is designed according to an orthogonal experiment design principle25(56) And performing orthogonal experiments, performing experiments to obtain experimental data, wherein the experimental data comprises all experimental factors and corresponding dehydration rates, and is used for further data analysis, and the influence of the experimental factors on the oil-water separation effect is researched by taking the dehydration rates as evaluation standards.
And 140, analyzing data of the orthogonal experiment by using a machine learning algorithm, and predicting the dehydration rate through experimental factors of the orthogonal experiment.
Specifically, a machine learning algorithm is used for data statistics, 6 experimental factors in an orthogonal experiment are used as input, the dehydration rate is used as output, a machine learning tool kit in calculation software is used for carrying out statistics and arrangement on the data, the calculation software can train a set of prediction functions according to the input data as training data, and the values of the experimental factors are input into the functions to obtain corresponding dehydration rate predicted values. The computing software may be matlab.
In one embodiment, the machine learning algorithm may be a BP neural network algorithm.
Step 140 may specifically include:
(1) firstly, carrying out normalization and arrangement on a data set of an orthogonal experiment according to a BP neural network algorithm, wherein the purpose of normalization and arrangement is to make the data ranges consistent and prevent data with large values from occupying higher weight.
(2) And selecting training data and test data, specifically, selecting 20 groups of training data and 5 groups of test data, wherein the aim is to compare the result integrated by the BP neural network with the test data to determine whether the test result meets the requirement, and if not, continuing iteration.
(3) Creating a BP neural network back propagation algorithm, setting the number of hidden layers of the BP neural network, specifically, the number of the hidden layers can be 3, setting a transmission function and training parameters, selecting a tansig function as the transmission function, and training by applying a Levenberg-Marquardt algorithm.
(4) And performing calculation simulation, training the whole function by utilizing the matlab according to designed parameters and algorithms, firstly setting a weight to calculate an output value, comparing the output value with an expected value, finishing the operation if the result meets the setting condition, re-determining the weight by back propagation if the result does not meet the setting condition, and repeatedly iterating the process by the matlab until the training target set by the function is met.
(5) After training is finished, the function can determine the optimal weight and threshold, data to be predicted are input into the function to be normalized, and the function is subjected to inverse normalization after prediction, so that a predicted value can be obtained.
(6) Estimation of prediction results, calculation of a decision coefficient R from the function2The closer the value is to 1, the better the prediction results are demonstrated.
The oil-water separation device and the method adopting the electromagnetic synergistic effect can effectively dehydrate crude oil, have simple structure and strong operability, improve the high efficiency, compactness and safety of the dehydrator, analyze the influence and prediction of each influence factor on the dehydration rate by designing orthogonal experiments and machine learning algorithms, and more effectively regulate and control the proportion of each influence factor, thereby effectively controlling the crude oil demulsification dehydration effect and the dehydration efficiency of the oil-water separation device with the electromagnetic synergistic effect.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the device, the electronic device and the readable storage medium embodiments, since they are substantially similar to the method embodiments, the description is simple, and the relevant points can be referred to the partial description of the method embodiments.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. An oil-water separation device with electromagnetic synergistic effect is characterized by comprising an oil-water separation main body and an electromagnetic power supply (8), wherein,
the oil-water separation main body comprises a constant temperature oscillator (1), a high temperature oil pump (2), a dynamic constant temperature oil bath groove (3), a magnet exciting coil (4), a high voltage electrode (6), a dehydration tank (7), a sealing gasket (11) and a top cover (12); wherein the content of the first and second substances,
one end of the temperature oscillator (1) is connected with one end of the dynamic constant-temperature oil bath (3) through the high-temperature oil pump (2), and the other end of the temperature oscillator (1) is connected with the other end of the dynamic constant-temperature oil bath (3);
the dehydration tank (7) is fixed at the bottom of the dynamic constant-temperature oil bath (3) through the sealing washer (11);
the top cover (12) is fixed at the top end of the dewatering tank (7) through bolts;
the magnet exciting coils (4) are respectively and symmetrically arranged on the left side and the right side of the dehydration tank (7) in parallel;
the high-voltage electrode (6) is fixed inside the dewatering tank (7) through an electrode clamping plate (9) and penetrates through the top cover (12);
the electromagnetic power supply (8) comprises an alternating current power supply, a voltage regulating unit, an electric field generating unit, a magnetic field exciting unit and a power supply box body; wherein the content of the first and second substances,
the alternating current power supply respectively allocates alternating current signals generated by the alternating current power supply to the electric field generating unit and the magnetic field exciting unit through the voltage regulating unit;
the alternating current power supply, the voltage regulating unit, the electric field generating unit and the magnetic field exciting unit are respectively arranged in the power supply box body;
the output end of the electric field generating unit of the electromagnetic power supply (8) is connected with the high-voltage electrode (6) through a high-voltage bushing (5), and the output end of the magnetic field exciting unit of the electromagnetic power supply (8) is connected with the magnet exciting coil (4).
2. The electromagnetic synergistic oil-water separation device according to claim 1, wherein the magnetic field excitation unit comprises a first rectification circuit, a first filter circuit and a first inverter circuit, the magnetic field excitation unit sequentially passes through the first rectification circuit, and the first filter circuit and the first inverter circuit transmit a signal, which is allocated to the magnetic field excitation unit, of the voltage regulation unit to the excitation coil (4);
the output signal of the magnetic field excitation unit is an adjustable square wave pulse signal.
3. An electromagnetic synergistic oil-water separator as claimed in claim 1, wherein said electric field generating unit includes a step-up transformer, a second rectifying circuit, a second filter circuit, a second inverter circuit and a third rectifying circuit,
the electric field generating unit generates a first electric field output signal by the alternating current signal regulated by the voltage regulating unit through the step-up transformer and outputs the first electric field output signal to the high-voltage electrode (6);
the electric field generating unit enables the alternating current signals distributed by the voltage regulating unit to sequentially pass through the second rectifying circuit, the second filter circuit, the second inverter circuit and the booster transformer to generate second electric field output signals, and the second electric field output signals are output to the high-voltage electrode (6);
the second electric field output signal generated by the electric field generating unit passes through the third rectifying circuit to generate a third electric field output signal, and the third electric field output signal is output to the high-voltage electrode (6).
4. An electromagnetic synergy oil-water separator according to claim 3, characterized in that the first electric field output signal of the electric field generating unit is an adjustable high voltage alternating current signal, and/or the second electric field output signal of the electric field generating unit is an adjustable high voltage square wave pulse signal, and/or the third electric field output signal of the electric field generating unit is an adjustable high voltage direct current signal;
the first electric field output signal, the second electric field output signal, and the third electric field output signal of the electric field generating unit may be output in combination or simultaneously.
5. An electromagnetic synergistic oil-water separator as claimed in claim 1, characterized in that the electromagnetic power supply (8) further comprises a measuring device installed in the power supply box and connected to each output loop of the magnetic field excitation unit and the electric field generation unit.
6. The electromagnetic synergistic oil-water separator as claimed in claim 1, wherein the electromagnetic power supply (8) further comprises a control unit, an overheat protection circuit, a plurality of operation buttons, a plurality of indicator lights and a data display, wherein,
the control unit and the overheat protection circuit are arranged in the power supply box body, the control buttons, the indicating lamps and the data display are arranged on the surface of the power supply box body respectively.
7. An electromagnetic synergistic oil-water separator as claimed in claim 1, characterized in that it comprises a plurality of said high voltage electrodes (6), wherein each of said high voltage electrodes (6) comprises a plurality of electrode plates, said plurality of electrode plates are connected from top to bottom and extend into the dehydration tank.
8. An electromagnetic synergistic oil-water separation method, comprising:
determining a plurality of influence factors influencing the oil-water separation effect under the electromagnetic synergistic effect;
under the condition of a plurality of influence factors, the electromagnetic synergistic oil-water separation device according to any one of claims 1 to 7 is used for carrying out combined action sequence experiments of a magnetic field and an electric field, and the sequence experiment with better action effect is selected for carrying out oil-water separation;
designing an orthogonal experiment, selecting experiment factors of the orthogonal experiment according to the determined multiple influence factors, and determining a corresponding dehydration rate;
and analyzing the data of the orthogonal experiment by using a machine learning algorithm, and predicting the dehydration rate through experimental factors of the orthogonal experiment.
9. An electromagnetically operated oil-water separation method as claimed in claim 8, wherein said plurality of influence factors include magnetic field frequency, magnetic field strength, magnetic field application time, electric field strength, electric field frequency, initial water content, and ambient temperature.
10. The method of claim 8, wherein 6 influencing factors are selected as the experimental factors in the orthogonal experiment, and the machine learning algorithm is a BP neural network algorithm.
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Application publication date: 20200911 |