CN115839961B - On-line measurement method for crude oil water content and visual analysis device - Google Patents
On-line measurement method for crude oil water content and visual analysis device Download PDFInfo
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- CN115839961B CN115839961B CN202210341034.1A CN202210341034A CN115839961B CN 115839961 B CN115839961 B CN 115839961B CN 202210341034 A CN202210341034 A CN 202210341034A CN 115839961 B CN115839961 B CN 115839961B
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Abstract
The invention provides an online measurement method of crude oil water content and a visual analysis device, and relates to the field of crude oil production. The visual analysis device for the water content of the crude oil comprises a mounting frame, wherein a pre-treatment barrel is fixedly connected in the middle of the inside of the mounting frame, a thorn is arranged in the pre-treatment barrel, an electric heating wire is arranged in the thorn, and a microwave test tube is fixedly connected below the pre-treatment barrel in the inside of the mounting frame. Through constitute the inside and outside electrode of coaxial transmission line with microwave test tube, transmission wire, through detecting the phase difference of two points on the transmission wire, realize the detection to the moisture content in the fluid, heat crude oil through the inside heater strip of thorn, the inside moisture of crude oil is gasified completely to can obtain the moisture content of crude oil through the reading tube, the two combines each other, makes crude oil moisture content detect more accurately, and the two each other is the backup, has increased the redundancy of device detection stability.
Description
Technical Field
The invention relates to the technical field of crude oil production, in particular to an online measurement method of crude oil water content and a visual analysis device.
Background
The crude oil is also called heavy oil, the oil produced by the oil field production oil well is crude oil, the crude oil produced by the oil field production operation area oil well of each oil field firstly enters a primary sedimentation tank of an oil delivery station of the operation area, water in the crude oil is drained in the primary sedimentation tank and then is led into a secondary sedimentation tank, the secondary sedimentation tank is led into a tertiary sedimentation tank to be dehydrated by adding a demulsifier, and the water content of the crude oil is less than or equal to 3% and reaches the requirement of external transmission and enters an external transmission crude oil storage tank.
In the existing crude oil water content detection technology, one common means is to measure the water content in the evaporated crude oil, but the technical means has the defects of poor detection precision and inconvenient operation, and the other common means is a microwave transmission line method, and the technical means has the defects of common electronic equipment, namely, the equipment has low stability redundancy, seriously depends on electronic power facilities and cannot completely adapt to severe environments, so the invention aims to reasonably combine the two to improve the precision and stability of a crude oil water content detection device.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an online measurement method and a visual analysis device for the water content of crude oil, which solve the problems of insufficient precision and stability of the existing crude oil water content detection device.
In order to achieve the above purpose, the invention is realized by the following technical scheme: the utility model provides a visual analytical equipment of crude oil water content, includes the installing frame, the inside intermediate fixedly connected with pre-treatment section of thick bamboo of installing frame, the inside of pre-treatment section of thick bamboo is provided with the thorn, the inside of thorn is provided with the electric heating wire, the inside of installing frame is located the below fixedly connected with microwave test tube of pre-treatment section of thick bamboo, the inside of microwave test tube is located its axial central line and is provided with coaxial transmission wire, the intraductal electric heating wire that all is provided with of wall and transmission wire of microwave test tube, be linked together through the three-way pipe between the top of microwave test tube and the bottom of pre-treatment section of thick bamboo, just the bottom port of three-way pipe extends to the inside below of microwave test tube, the inside of three-way pipe is located its connecting mouth of pipe department with pre-treatment section of thick bamboo is provided with the third pipe valve, the inside of three-way pipe is located its rest side branch mouth of pipe department and is provided with the second pipe valve.
Preferably, the inside of installing frame is located the top one side fixedly connected with condensation outer cone of leading processing section of thick bamboo, the condensation outer cone is the inversion frustum column structure and inside is provided with the inversion frustum column inner chamber that link up from top to bottom, one side that condensation outer cone is close to leading processing section of thick bamboo is provided with the steam ingress pipe, a port of steam ingress pipe is linked together with the inner chamber of condensation outer cone, and another port is linked together with the inside top of leading processing section of thick bamboo, the bottom fixedly connected with vertical reading pipe of condensation outer cone, the reading pipe is regular cylinder pipe and middle part is provided with transparent observation window, and this observation window is provided with the water level scale, the inner wall of reading pipe is covered with one deck super hydrophobic coating, the top mouth of reading pipe is linked together with the inner chamber bottom mouth of condensation outer cone, the inside of reading pipe is provided with first tube valve in its bottom mouth position department, the inside top fixedly connected with condensation inner cone just the inner cone seals the inner chamber top port of condensation outer cone.
Preferably, an outer cone condensing medium cavity is arranged in the side wall of the condensing outer cone, an inner cone condensing medium cavity is arranged in the side wall of the condensing inner cone, the outer cone condensing medium cavity is communicated with the inner cone condensing medium cavity, and the inner walls of the condensing outer cone and the condensing inner cone are covered with a layer of super-hydrophobic coating.
Preferably, the inside of installing frame is located the side fixedly connected with condensing box of leading processing section of thick bamboo, the inside of condensing box is cut apart into two bins, and wherein one side bin sets up to the condensing medium storehouse, the coolant liquid is equipped with to the inside of condensing medium storehouse, the inside fixedly connected with copper pipe of opposite side bin, the copper pipe coil for the S shape just the both ends mouth of copper pipe is located the top of this side bin, the both ends mouth of copper pipe is linked together with condensing medium storehouse and interior cone condensing medium chamber through the pipe respectively, one side tank wall that the condensing box kept away from the condensing medium storehouse is provided with the through-hole, the inside fixedly connected with fan of this through-hole, the wind direction of fan blows to the copper pipe, the bottom fixedly connected with liquid pump of condensing box, the water inlet of liquid pump is linked together with the bottom mouth of a river of condensing medium storehouse, the delivery port of liquid pump is linked together with outer cone condensing medium chamber through the pipe.
Preferably, the inside of installing frame is located the opposite side top fixedly connected with of leading processing section of thick bamboo, side fixedly connected with first tail gas treatment jar, the inside of first tail gas treatment jar is filled with the active carbon, two import and export be linked together with the inside of leading processing section of thick bamboo and first tail gas treatment jar through the pipeline respectively, just be provided with first pump valve in communicating pipe between the leading processing section of thick bamboo, be provided with the second pump valve in communicating pipe between the first tail gas treatment jar.
Preferably, the inside of installing frame is located the opposite side top fixedly connected with first diaphragm pump of microwave test tube, the side fixedly connected with second tail gas treatment jar of first diaphragm pump, the inside of second tail gas treatment jar is filled with the active carbon, two import and export of first diaphragm pump are linked together with the inside of microwave test tube and second tail gas treatment jar through the pipeline respectively, just be provided with the third pump valve in the communication pipeline between first diaphragm pump and the microwave test tube, be provided with the fourth pump valve in the communication pipeline between first diaphragm pump and the second tail gas treatment jar.
Preferably, the first liquid level meter is arranged in the middle of the top of the pre-treatment cylinder, the second liquid level meter is arranged in the middle of the top of the microwave test tube, an oil drain pipe is arranged at the bottom of the microwave test tube and is communicated with the microwave test tube, and a fourth pipe valve is arranged in the oil drain pipe.
Preferably, an on-line measurement method of a visual analysis device for crude oil water content comprises the following steps:
s1, connecting a three-way pipe and an oil discharge pipe into a crude oil storage device, closing a third pipe valve and a fourth pipe valve, opening a second pipe valve, closing the fourth pump valve and opening the third pump valve when a first diaphragm pump is in a suction working state, pumping out air in a microwave test tube, opening the fourth pump valve and closing the third pump valve when the first diaphragm pump is turned into a discharge working state, and discharging the air pumped out in the microwave test tube into a second tail gas treatment tank, wherein crude oil enters the microwave test tube by utilizing a negative pressure environment, and pumping the crude oil into the microwave test tube by the repeated actions of the first diaphragm pump, the third pump valve and the fourth pump valve until the microwave test tube is filled;
s2, a first pipe valve, a second pipe valve and a fourth pipe valve are closed, the third pipe valve is opened, the fourth pipe valve is opened, when the first diaphragm pump is in a suction working state, the third pipe valve is closed, the fourth pipe valve is opened, air is sucked from the interior of the second tail gas treatment tank, when the first diaphragm pump is turned into a discharge working state, the third pipe valve is opened, the fourth pipe valve is closed, the sucked air is blown into the microwave test tube, and the first pipe valve, the second pipe valve and the first tail gas treatment tank work in the interior of the pre-treatment tank to create a negative pressure environment, so that under the combined action of the first pipe valve, crude oil in the microwave test tube is flushed into the pre-treatment tank, otherwise, the crude oil in the pre-treatment tank is returned to the microwave test tube, and the crude oil is repeatedly impacted into the pre-treatment tank by the thorns so that the interior of the microwave test tube is uniformly stirred, and returns to the microwave test tube after the crude oil is uniformly stirred;
s3, in the microwave test tube, the microwave test tube is an outer electrode, the transmission wire is an inner electrode, the inner electrode and the outer electrode form a coaxial transmission line, when a microwave signal passes through the coaxial transmission line, the phase and the amplitude of the microwave signal on the transmission wire are changed due to the fact that the crude oil in the microwave test tube changes, and therefore the dielectric constant of crude oil liquid can be calculated through detecting the phase difference of two points on the transmission wire, detection of the water content in oil liquid is achieved, and the working principle is that: the microwave signal oscillator generates electromagnetic wave signals of 300Mhz-300Ghz, the power divider divides the signals into two paths, one path of the signals is directly transmitted to the phase detection circuit, the other path of the signals does not generate phase change, the other path of the signals enters the detector through a coaxial transmission line consisting of the microwave test tube and the transmission wire, the phase can change monotonically along with the change of the water content of crude oil, and the phase detection circuit further realizes the detection of the phases of the two paths of electromagnetic waves;
wherein, the calculation formula of the transmission speed v of the electromagnetic wave:
the propagation speed depends on the magnetic permeability mu and the dielectric constant epsilon of the medium, the magnetic permeability of the non-magnetic material is similar to that of vacuum, the dielectric constant of water is 80, the dielectric constant of oil is 2-3, and the transmission speed of electromagnetic waves is reduced along with the increase of the water content in oil liquid;
the phase shift of the electromagnetic wave through the transmission line of length l is:
in the formula, ω is the angular frequency of the electromagnetic wave, μ 0 Is vacuum magnetic permeability epsilon 0 Is vacuum dielectric constant epsilon r Is the relative dielectric constant of oil liquid, Z L Is a transmissionThe line, i.e. the fixed load at the output end of the transmission wire, b and a are the radii of the outer electrode, i.e. the microwave test tube, and the inner electrode, i.e. the transmission wire, respectively;
s4, after the water content of the crude oil is measured by a microwave transmission line method through a microwave test tube, the crude oil in the microwave test tube is blown into a pre-treatment cylinder, a third pipe valve is closed, meanwhile, the crude oil amount in the pre-treatment cylinder is converted by a second liquid level meter and a first liquid level meter, the crude oil is heated by a heating wire in a thorn, so that the water content in the crude oil is completely gasified and flows into an inner cavity of a condensing outer cone, cooling liquid is circulated in an outer cone condensing medium cavity and an inner cone condensing medium cavity through a liquid pump, and the entered water vapor is liquefied into water drops and falls into a reading pipe, so that the water content of the crude oil can be obtained through water level scales of an observation window on the reading pipe;
s5, finally, the crude oil in the pre-treatment barrel is totally blown into the microwave test tube again and discharged through the oil discharge tube, one-time detection of the water content of the crude oil is completed, and in addition, the adhesion to the crude oil is reduced by the detection device through the thorn, the microwave test tube and the electric heating wire in the transmission wire, the precision is improved, and the stability of subsequent operation is guaranteed.
The invention provides an online measurement method for crude oil water content and a visual analysis device. The beneficial effects are as follows:
1. according to the invention, the microwave test tube and the transmission wire form the inner electrode and the outer electrode of the coaxial transmission wire, when a microwave signal passes through the coaxial transmission wire, the phase and the amplitude of the microwave signal on the transmission wire are changed due to the crude oil in the microwave test tube, so that the dielectric constant of crude oil liquid can be calculated by detecting the phase difference of two points on the transmission wire, and the detection of the water content in oil liquid is realized.
2. After the water content of crude oil is measured by a microwave transmission line method, the crude oil in a microwave test tube is blown into a pre-treatment cylinder, a third pipe valve is closed, the crude oil amount in the pre-treatment cylinder is converted by a second liquid level meter and a first liquid level meter, the crude oil is heated by a heating wire in a thorn, so that the water content in the crude oil is completely gasified and flows into an inner cavity of a condensing outer cone, cooling liquid is circulated in an outer cone condensing medium cavity and an inner cone condensing medium cavity by a liquid pump, and the water vapor entering the cooling liquid is liquefied into water drops and falls into a reading pipe, so that the water content of the crude oil can be obtained by the water level scale of an observation window on the reading pipe.
3. According to the invention, the first pipe valve, the second pipe valve and the fourth pipe valve are controlled to be closed, the third pump valve is closed and the fourth pump valve is opened when the first diaphragm pump is in a suction working state, air is sucked from the interior of the second tail gas treatment tank, the third pump valve is opened and the fourth pump valve is closed when the first diaphragm pump is turned into a discharge working state, the sucked air is blown into the microwave test tube, and the first pump valve, the second pump valve and the first tail gas treatment tank work in the interior of the pre-treatment tank to create a negative pressure environment, so that under the combined action of the first diaphragm pump, crude oil in the interior of the microwave test tube is flushed into the pre-treatment tank, otherwise, the crude oil in the pre-treatment tank is returned into the microwave test tube, and the interior of the crude oil is uniformly stirred by repeatedly striking thorns in the pre-treatment tank.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the interior of a pretreatment canister according to the present invention;
FIG. 3 is an enlarged view of FIG. 2 at A;
FIG. 4 is a schematic view of the interior of the condensing chamber of the present invention;
FIG. 5 is a schematic view of the interior of a microwave test tube according to the present invention;
FIG. 6 is a schematic view of the interior of a first exhaust treatment tank of the present invention;
FIG. 7 is a diagram showing the effect of the coaxial transmission line of the present invention;
FIG. 8 is a schematic diagram of a coaxial transmission line circuit model according to the present invention;
fig. 9 is an equivalent circuit schematic diagram of the line element dz of the present invention.
1, installing a frame; 2. a pre-treatment cylinder; 3. thorns; 4. a first level gauge; 5. a first diaphragm pump; 6. a first pump valve; 7. a second pump valve; 8. a first tail gas treatment tank; 9. condensing the outer cone; 10. condensing the inner cone; 11. a water vapor inlet pipe; 12. an outer cone condensing medium cavity; 13. an inner cone condensing medium cavity; 14. a condensing box; 15. copper tube; 16. a blower; 17. condensing medium bin; 18. a liquid pump; 19. a reading tube; 20. a first pipe valve; 21. a three-way pipe; 22. a second pipe valve; 23. a third pipe valve; 24. a microwave test tube; 25. a transmission line; 26. a second level gauge; 27. an oil drain pipe; 28. a fourth pipe valve; 29. a first diaphragm pump; 30. a third pump valve; 31. a fourth pump valve; 32. a second tail gas treatment tank.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples:
as shown in fig. 1-6, the embodiment of the invention provides a visual analysis device for crude oil water content, which comprises a mounting frame 1, wherein a pre-treatment tube 2 is fixedly connected in the middle of the inside of the mounting frame 1, a thorn 3 is arranged in the pre-treatment tube 2, an electric heating wire is arranged in the thorn 3, a microwave test tube 24 is fixedly connected below the pre-treatment tube 2 in the inside of the mounting frame 1, a coaxial transmission wire 25 is arranged on the axial center line of the microwave test tube 24, electric heating wires are arranged in the tube wall of the microwave test tube 24 and in the transmission wire 25, the top of the microwave test tube 24 is communicated with the bottom of the pre-treatment tube 2 through a three-way tube 21, the bottom end opening of the three-way tube 21 extends to the lower part of the inside of the microwave test tube 24, a third tube valve 23 is arranged in the part of the three-way tube 21, which is positioned at the connecting tube opening of the three-way tube 21 with the pre-treatment tube 2, and a second tube valve 22 is arranged in the part of the rest side tube opening.
The inside of the installation frame 1 is located one side of the top of the pre-treatment cylinder 2 and fixedly connected with a condensation outer cone 9, the condensation outer cone 9 is of an inverted frustum-shaped structure and is internally provided with an inverted frustum-shaped inner cavity which penetrates through up and down, one side of the condensation outer cone 9, which is close to the pre-treatment cylinder 2, is provided with a water vapor inlet pipe 11, one port of the water vapor inlet pipe 11 is communicated with the inner cavity of the condensation outer cone 9, the other port of the water vapor inlet pipe is communicated with the upper part of the interior of the pre-treatment cylinder 2, the bottom of the condensation outer cone 9 is fixedly connected with a reading pipe 19 in a vertical state, the reading pipe 19 is a regular cylindrical pipe and is provided with a transparent observation window in the middle, the observation window is provided with a water level scale, the inner wall of the reading pipe 19 is covered with a layer of super-hydrophobic coating, the top port of the reading pipe 19 is communicated with the bottom port of the inner cavity of the condensation outer cone 9, the inner part of the reading pipe 19 is located at the bottom port position of the reading pipe, the inner cone 10 is fixedly connected with the condensation inner cone 9, and the inner cone 10 is sealed with the top port of the inner cavity of the condensation outer cone 9.
An outer cone condensing medium cavity 12 is arranged in the side wall of the condensing outer cone 9, an inner cone condensing medium cavity 13 is arranged in the side wall of the condensing inner cone 10, the outer cone condensing medium cavity 12 is communicated with the inner cone condensing medium cavity 13, and the inner walls of the condensing outer cone 9 and the condensing inner cone 10 are covered with a layer of super-hydrophobic coating.
The inside of the installation frame 1 is located the side fixedly connected with condensing box 14 of leading processing section of thick bamboo 2, the inside of condensing box 14 is cut apart into two bins, wherein one side bin sets up to condensing medium storehouse 17, the inside of condensing medium storehouse 17 is equipped with the coolant liquid, the inside fixedly connected with copper pipe 15 of opposite side bin, copper pipe 15 coils to S-shaped and copper pipe 15 ' S both ends mouth is located the top of this side bin, copper pipe 15 ' S both ends mouth is linked together with condensing medium storehouse 17 and interior cone condensing medium chamber 13 through the pipe respectively, one side wall that condensing box 14 kept away from condensing medium storehouse 17 is provided with the through-hole, the inside fixedly connected with fan 16 of this through-hole, the wind direction of fan 16 blows to copper pipe 15, the bottom fixedly connected with liquid pump 18 of condensing box 14, the water inlet of liquid pump 18 is linked together with condensing medium storehouse 17 ' S bottom mouth of a river, the delivery port of liquid pump 18 is linked together with outer cone condensing medium chamber 12 through the pipe.
The inside of the installation frame 1 is located the opposite side top fixedly connected with 5 of leading processing section of thick bamboo 2, the side fixedly connected with first tail gas treatment jar 8 of 5, and the inside of first tail gas treatment jar 8 is filled with the active carbon, and two import and export of 5 are linked together with leading processing section of thick bamboo 2 and the inside of first tail gas treatment jar 8 through the pipeline respectively, and are provided with first pump valve 6 in the communicating pipe between 5 and the leading processing section of thick bamboo 2, are provided with second pump valve 7 in the communicating pipe between 5 and the first tail gas treatment jar 8.
The inside of the installation frame 1 is located the opposite side top fixedly connected with first diaphragm pump 29 of microwave test tube 24, the side fixedly connected with second tail gas treatment jar 32 of first diaphragm pump 29, the inside of second tail gas treatment jar 32 is filled with the active carbon, two import and export of first diaphragm pump 29 are linked together with the inside of microwave test tube 24 and second tail gas treatment jar 32 through the pipeline respectively, and be provided with third pump valve 30 in the pipeline that communicates between first diaphragm pump 29 and the microwave test tube 24, be provided with fourth pump valve 31 in the pipeline that communicates between first diaphragm pump 29 and the second tail gas treatment jar 32.
The top middle of the pre-treatment cylinder 2 is provided with a first liquid level meter 4, the top middle of the microwave test tube 24 is provided with a second liquid level meter 26, the bottom of the microwave test tube 24 is provided with an oil drain pipe 27, the oil drain pipe 27 is communicated with the microwave test tube 24, and a fourth pipe valve 28 is arranged in the oil drain pipe 27.
An on-line measurement method of a visual analysis device for crude oil water content comprises the following steps:
s1, connecting a tee pipe 21 and an oil drain pipe 27 into a crude oil storage device, closing a third pipe valve 23, a fourth pipe valve 28 and opening a second pipe valve 22, closing a fourth pump valve 31 and opening a third pump valve 30 when a first diaphragm pump 29 is in a suction working state, pumping out air in a microwave test tube 24, opening the fourth pump valve 31 and closing the third pump valve 30 when the first diaphragm pump 29 is switched into a discharge working state, namely discharging the air pumped out in the microwave test tube 24 into a second tail gas treatment tank 32, enabling crude oil to enter the microwave test tube 24 by utilizing a negative pressure environment, and pumping the crude oil into the microwave test tube 24 by repeating the actions of the first diaphragm pump 29, the third pump valve 30 and the fourth pump valve 31 until the microwave test tube 24 is filled;
s2, the first pipe valve 20, the second pipe valve 22, the fourth pipe valve 28 are closed, the third pipe valve 23 is opened, the third pump valve 30 is closed, the fourth pump valve 31 is opened when the first diaphragm pump 29 is in an inhalation working state, air is inhaled from the interior of the second tail gas treatment tank 32, when the first diaphragm pump 29 is switched into a discharge working state, the third pump valve 30 is opened, the fourth pump valve 31 is closed, the inhaled air is blown into the microwave test tube 24, and the like 5, the first pump valve 6, the second pump valve 7 and the first tail gas treatment tank 8 work in the interior of the pre-treatment tank 2 to create a negative pressure environment, so that under the combined action of the 5 and the first diaphragm pump 29, crude oil in the interior of the microwave test tube 24 is flushed into the pre-treatment tank 2, otherwise, the crude oil in the pre-treatment tank 2 is returned to the microwave test tube 24, and the crude oil is repeatedly impacted into the pre-treatment tank 2 by the thorn 3, so that the interior of the crude oil is uniformly stirred, and returns to the microwave test tube 24 after uniform stirring;
s3, in the microwave test tube 24, the microwave test tube 24 is an outer electrode, the transmission wire 25 is an inner electrode, the inner electrode and the outer electrode form a coaxial transmission line, when a microwave signal passes through the coaxial transmission line, the phase and the amplitude of the microwave signal on the transmission wire 25 are changed due to the fact that the crude oil in the microwave test tube 24 changes, and therefore the dielectric constant of crude oil liquid can be calculated through detecting the phase difference of two points on the transmission wire 25, and the detection of the water content in oil liquid is achieved, and the working principle is that: the microwave signal oscillator generates electromagnetic wave signals of 300Mhz-300Ghz, the power divider divides the signals into two paths, one path of the signals is directly transmitted to the phase detection circuit, the other path of the signals does not generate phase change, the other path of the signals enters the detector through a coaxial transmission line consisting of the microwave test tube 24 and the transmission wire 25, the phase can change monotonically along with the change of the water content of crude oil, and the phase detection circuit further realizes the detection of the phases of the two paths of electromagnetic waves;
wherein, the calculation formula of the transmission speed v of the electromagnetic wave:
the propagation speed depends on the magnetic permeability mu and the dielectric constant epsilon of the medium, the magnetic permeability of the non-magnetic material is similar to that of vacuum, the dielectric constant of water is 80, the dielectric constant of oil is 2-3, and the transmission speed of electromagnetic waves is reduced along with the increase of the water content in oil liquid;
the phase shift of the electromagnetic wave through the transmission line of length l is:
in the formula, ω is the angular frequency of the electromagnetic wave, μ 0 Is vacuum magnetic permeability epsilon 0 Is vacuum dielectric constant epsilon r Is the relative dielectric constant of oil liquid, Z L Is the fixed load at the output of the transmission line, i.e. transmission line 25, and b and a are the radii of the outer electrode, i.e. microwave test tube 24, and the inner electrode, i.e. transmission line 25, respectively.
In the embodiment, the conducting wire 25 is coated with the macromolecule insulating film with oleophobic property and dielectric constant not lower than that of the oil, so that the influence of mineralized water on the water content measurement precision is effectively reduced by insulation, and the electrode is not easy to be covered by the oil due to the oleophobic property, so that the measurement precision of the water content in the oil is improved;
the detection method can realize the detection of the water content of oil liquid of 0-100%, at least 3 oil-water mixed liquids with different proportions including 0% water content and 100% water content can be configured in the calibration process, the water content is respectively X0, X1, … and Xn, the phase differences of the different mixed liquids are measured to be phi 0, phi 1, … and phi n, and the method is obtained by polynomial fitting:
X＝a 0 *Φ n-1 +a 1 *Φ n-2 +…a n-2 *Φ+a n 。
s4, after the water content of the crude oil is measured by a microwave transmission line method through a microwave test tube 24, the crude oil in the microwave test tube 24 is blown into the pre-treatment cylinder 2, then the third pipe valve 23 is closed, meanwhile, the crude oil amount in the pre-treatment cylinder 2 is converted by a second liquid level meter 26 and a first liquid level meter 4, the crude oil is heated by a heating wire in the thorn 3, so that the water content in the crude oil is completely gasified and flows into the inner cavity of the condensation outer cone 9, the liquid pump 18 circulates cooling liquid in the outer cone condensation medium cavity 12 and the inner cone condensation medium cavity 13, and the entered water vapor is liquefied into water drops and falls into the reading pipe 19, so that the water content of the crude oil can be obtained through the water level scale of the observation window on the reading pipe 19;
s5, finally, the crude oil in the pre-treatment barrel 2 is totally blown into the microwave test tube 24 again and is discharged through the oil discharge tube 27, primary water content detection of the crude oil is completed, and in addition, the adhesion to the crude oil is reduced by the detection device through the thorn 3, the microwave test tube 24 and the electric heating wires in the transmission wire 25, the precision is improved, and the stability of subsequent operation is guaranteed.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. Visual analytical equipment of crude oil water content, including installing frame (1), its characterized in that: the utility model discloses a condenser tube, which is characterized in that a front treatment cylinder (2) is fixedly connected in the middle of the inside of a mounting frame (1), a thorn (3) is arranged in the front treatment cylinder (2), an electric heating wire is arranged in the thorn (3), a microwave test tube (24) is fixedly connected below the front treatment cylinder (2) in the inside of the mounting frame (1), a coaxial transmission wire (25) is arranged on the axial center line of the microwave test tube (24), electric heating wires are arranged in the tube wall of the microwave test tube (24) and in the transmission wire (25), the top of the microwave test tube (24) is communicated with the bottom of the front treatment cylinder (2) through a three-way pipe (21), the bottom end opening of the three-way pipe (21) extends to the inner lower part of the microwave test tube (24), a third cone valve (23) is arranged at the connecting tube opening of the three-way pipe (21) and the front treatment cylinder (2), an inner tube valve (9) is arranged on the inner side of the inner part of the three-way pipe (21), the inner part of the three-way pipe is positioned at the inner part of the front treatment cylinder (2), the inner part of the inner cone (9 is arranged on the inner side of the inner part of the front treatment cylinder (9 of the front cone (9), one side of the condensation outer cone (9) close to the pre-treatment cylinder (2) is provided with a water vapor inlet pipe (11), one port of the water vapor inlet pipe (11) is communicated with the inner cavity of the condensation outer cone (9), the other port is communicated with the upper part of the interior of the pre-treatment cylinder (2), the bottom of the condensation outer cone (9) is fixedly connected with a reading pipe (19) in a vertical state, the reading pipe (19) is a regular cylindrical pipe, the middle part of the reading pipe is provided with a transparent observation window, the observation window is provided with a water level scale, the inner wall of the reading pipe (19) is covered with a layer of super-hydrophobic coating, the top port of the reading pipe (19) is communicated with the bottom port of the inner cavity of the condensation outer cone (9), the interior of the reading pipe (19) is provided with a first pipe valve (20) at the bottom port position of the reading pipe, the upper part of the interior of the condensation outer cone (9) is fixedly connected with a condensation inner cone (10) and the top port of the inner cavity of the condensation outer cone (9), the inner cone (9) is provided with a layer of super-hydrophobic coating, the inner side wall of the condensation outer cone (9) is covered with a medium between the condensation medium (13) and the inner cone (13), the inside of the installation frame (1) is fixedly connected with a condensing box (14) at the side of the front treatment cylinder (2), the inside of the condensing box (14) is divided into two chambers, one side chamber is provided with a condensing medium chamber (17), cooling liquid is filled in the condensing medium chamber (17), a copper pipe (15) is fixedly connected to the inside of the other side chamber, the copper pipe (15) is coiled into an S shape, two ports of the copper pipe (15) are positioned above the side chamber, two ports of the copper pipe (15) are respectively communicated with the condensing medium chamber (17) and an inner cone condensing medium cavity (13) through a conduit, one side chamber wall of the condensing box (14) far away from the condensing medium chamber (17) is provided with a through hole, the inside of the through hole is fixedly connected with a fan (16), the wind direction of the fan (16) blows towards the copper pipe (15), the bottom of the condensing box (14) is fixedly connected with a liquid pump (18), the water inlet of the liquid pump (18) is communicated with the bottom of the condensing medium chamber (17) through the conduit, the liquid pump (24) is communicated with the top of the middle of the front treatment cylinder (2), an oil drain pipe (27) is arranged at the bottom of the microwave test tube (24), the oil drain pipe (27) is communicated with the microwave test tube (24), and a fourth pipe valve (28) is arranged in the oil drain pipe (27).
2. The visual analysis device for the water content of crude oil according to claim 1, wherein: the inside of installing frame (1) is located the opposite side top fixedly connected with first diaphragm pump (5) of leading processing section of thick bamboo (2), the side fixedly connected with first tail gas treatment jar (8) of first diaphragm pump (5), the inside packing of first tail gas treatment jar (8) has the active carbon, the inside of leading processing section of thick bamboo (2) and first tail gas treatment jar (8) is linked together through pipeline respectively to two of first diaphragm pump (5) import and export, just be provided with first pump valve (6) in the communicating pipe between first diaphragm pump (5) and the leading processing section of thick bamboo (2), be provided with second pump valve (7) in the communicating pipe between first diaphragm pump (5) and first tail gas treatment jar (8).
3. The visual analysis device for the water content of crude oil according to claim 1, wherein: the inside of installing frame (1) is located the opposite side top fixedly connected with first diaphragm pump (29) of microwave test tube (24), the side fixedly connected with second tail gas treatment jar (32) of first diaphragm pump (29), the inside of second tail gas treatment jar (32) is filled with the active carbon, the inside of two import and export of first diaphragm pump (29) with microwave test tube (24) and second tail gas treatment jar (32) is linked together through the pipeline respectively, just be provided with third pump valve (30) in the pipeline of communicating between first diaphragm pump (29) and microwave test tube (24), be provided with fourth pump valve (31) in the pipeline of communicating between first diaphragm pump (29) and second tail gas treatment jar (32).
4. The method for on-line measurement of a visual analysis device for crude oil water content according to claim 1, wherein: the method comprises the following steps:
s1, connecting a three-way pipe (21) and an oil discharge pipe (27) into a crude oil storage device, closing a third pipe valve (23) and a fourth pipe valve (28) and opening a second pipe valve (22), when a first diaphragm pump (29) is in an inhalation working state, closing a fourth pump valve (31) and opening a third pump valve (30), pumping out air in a microwave test tube (24), when the first diaphragm pump (29) is switched into an ejection working state, opening the fourth pump valve (31) and closing the third pump valve (30), namely, exhausting the air pumped out of the microwave test tube (24) into a second tail gas treatment tank (32), enabling crude oil to enter the microwave test tube (24) by utilizing a negative pressure environment, and repeatedly acting the first diaphragm pump (29), the third pump valve (30) and the fourth pump valve (31) to pump the crude oil into the microwave test tube (24) until the microwave test tube (24) is filled;
s2, the first pipe valve (20), the second pipe valve (22) and the fourth pipe valve (28) are closed, the third pipe valve (23) is opened, the first diaphragm pump (29) is closed, the fourth pump valve (31) is opened, air is sucked from the inside of the second tail gas treatment tank (32), when the first diaphragm pump (29) is switched into a discharge working state, the third pump valve (30) is opened, the fourth pump valve (31) is closed, the sucked air is blown into the microwave test tube (24), and the same way (5), the first pump valve (6), the second pump valve (7) and the first tail gas treatment tank (8) work in the inside of the pre-treatment tube (2) to create a negative pressure environment, so that under the combined action of the first pump (29) and the third pump valve (30), crude oil in the inside of the microwave test tube (24) is sucked into the pre-treatment tube (2), and conversely, the crude oil in the pre-treatment tube (2) is returned to the microwave test tube (24), and the crude oil is repeatedly and uniformly stirred by striking the pre-treatment tube (2), and repeatedly and uniformly stirring the crude oil in the pre-treatment tube (3);
s3, in the microwave test tube (24), the microwave test tube (24) is an outer electrode, the transmission wire (25) is an inner electrode, the inner electrode and the outer electrode form a coaxial transmission line, when a microwave signal passes through the coaxial transmission line, as the phase and the amplitude of the microwave signal on the transmission wire (25) are changed by the crude oil in the microwave test tube (24), the dielectric constant of the crude oil liquid can be calculated by detecting the phase difference of two points on the transmission wire (25), the detection of the water content in oil liquid is realized, and the working principle is as follows: the microwave signal oscillator generates electromagnetic wave signals of 300Mhz-300Ghz, the power divider divides the signals into two paths, one path of the signals is directly transmitted to the phase detection circuit, the other path of the signals does not generate phase change, the other path of the signals enters the detector through a coaxial transmission line consisting of a microwave test tube (24) and a transmission wire (25), the phase can change monotonically along with the change of the water content of crude oil, and the phase detection circuit further realizes the detection of the phases of the two paths of electromagnetic waves;
wherein, the calculation formula of the transmission speed v of the electromagnetic wave:
the propagation speed depends on the magnetic permeability mu and the dielectric constant epsilon of the medium, the magnetic permeability of the non-magnetic material is similar to that of vacuum, the dielectric constant of water is 80, the dielectric constant of oil is 2-3, and the transmission speed of electromagnetic waves is reduced along with the increase of the water content in oil liquid;
the phase shift of the electromagnetic wave through the transmission line of length l is:
in the formula, ω is the angular frequency of the electromagnetic wave, μ 0 Is vacuum magnetic permeability epsilon 0 Is vacuum dielectric constant epsilon r Is the relative dielectric constant of oil liquid, Z L Is the fixed load of the output end of the transmission line, namely the transmission wire (25), and b and a are the radii of the outer electrode, namely the microwave test tube (24) and the inner electrode, namely the transmission wire (25), respectively;
s4, after the water content of crude oil is measured by a microwave transmission line method through a microwave test tube (24), the crude oil in the microwave test tube (24) is blown into a pre-treatment cylinder (2), a third pipe valve (23) is closed, meanwhile, the crude oil amount in the pre-treatment cylinder (2) is converted by a second liquid level meter (26) and a first liquid level meter (4), the crude oil is heated by a heating wire in a thorn (3), so that the water content in the crude oil is completely gasified and flows into an inner cavity of a condensation outer cone (9), a liquid pump (18) circulates a cooling liquid in an outer cone condensation medium cavity (12) and an inner cone condensation medium cavity (13), and the entered water vapor is liquefied into water drops and falls into a reading pipe (19), so that the water content of the crude oil can be obtained through the water level scale of an observation window on the reading pipe (19);
s5, finally, the crude oil in the pre-treatment barrel (2) is totally blown into the microwave test tube (24) again and is discharged through the oil discharge tube (27), one-time detection of the water content of the crude oil is completed, and in addition, the adhesion to the crude oil is reduced by the detection device through the thorn (3), the microwave test tube (24) and the electric heating wire in the transmission wire (25), so that the precision is improved and the stability of subsequent operation is guaranteed.
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| US4862060A (en) * | 1986-11-18 | 1989-08-29 | Atlantic Richfield Company | Microwave apparatus for measuring fluid mixtures |
| US6281801B1 (en) * | 1997-06-04 | 2001-08-28 | Bechtel Bwxt Idaho, Llc | System and method for monitoring water content or other dielectric influences in a medium |
| CN102778410B (en) * | 2012-07-31 | 2014-06-25 | 张伟 | Method and device for rude oil on-line phase-changing water-containing detection |
| CN204008502U (en) * | 2014-04-09 | 2014-12-10 | 北京辰安测控科技有限公司 | Measure the device of material moisture |
| CN106770379A (en) * | 2016-12-26 | 2017-05-31 | 天津睿源科特机械设备有限公司 | A kind of crude oil water containing measuring device |
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| CN211955478U (en) * | 2020-03-31 | 2020-11-17 | 菏泽鼎新仪器有限公司 | Crude oil water content determination analyzer |
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