An on-line automatic detection device for water content in crude oil

Abstract

The present application provides a kind of crude oil water content on-line automatic detection device, including waveguide choke explosion-proof control box, the center between the upper and lower end surface of the explosion-proof control box is provided with a crude oil medium isolation tube, a section of waveguide carrier tube is arranged in the crude oil medium isolation tube, from inside to outside, the waveguide carrier tube is sequentially provided with cylindrical medium substrate layer and medium shielding layer concentric with the guide carrier tube, the medium substrate layer and the medium shielding layer are embedded with capacitance grid piece one, strip line detection sensor and capacitance grid piece two around the guide carrier tube from top to bottom.The crude oil water content on-line automatic detection device is installed on the oil production pipeline, real-time monitoring of the water content information of the crude oil, safe and reliable, easy to install and maintain;Especially the machine uses capacitance grid detection technology, water content detection is not affected by working condition, medium viscosity, pressure and other changes, to ensure the water content detection standard.

Description

TECHNICAL FIELD

[0001] The present application relates to crude oil water detection technical field, especially to a kind of crude oil water online automatic detection device. BACKGROUND

[0002] Unprocessed oil is called crude oil. It is a viscous oily liquid with a special odor. It is a mixture of various liquid hydrocarbons such as alkanes, cycloalkanes, aromatic hydrocarbons and alkenes. The main components of crude oil are carbon and hydrogen, accounting for 83-87% and 11-14% respectively. Crude oil can be processed to obtain various fuel oil, solvent oil, lubricating oil, lubricating grease, paraffin, asphalt and liquefied gas, aromatic hydrocarbon and other products, which provide fuel, raw materials and chemical products for various departments of national economy.

[0003] Crude oil extraction and extraction of crude oil from the well generally contains a certain amount of water, and too much water in crude oil will cause waste in storage and transportation.

[0004] The crude oil water content tester is a new product developed for oil field. The existing crude oil water content tester needs to sample the extracted crude oil for detection, and cannot realize real-time monitoring of the water content of crude oil. Manual sampling has small sampling frequency and is easily affected by oil transportation conditions and other human factors, so the sample is not representative, and the disputes in transfer measurement caused by this are increasing. SUMMARY

[0005] In order to solve the above technical problems, the present application is realized by the following technical scheme:

[0006] A kind of crude oil water online automatic detection device, it is characterized in that, including waveguide choke explosion-proof control box, the waveguide choke explosion-proof control box is rectangular parallelepiped, the front of the waveguide choke explosion-proof control box is equipped with an explosion-proof display control screen, the center between the upper and lower end faces of the explosion-proof control box is equipped with a crude oil medium isolation tube, the top of the crude oil medium isolation tube is integrally connected with crude oil pipeline connection flange plate one, the bottom is integrally connected with crude oil pipeline connection flange plate two, the bottom of the crude oil medium isolation tube is equipped with pipeline crude oil medium oil inlet, and the top is equipped with pipeline crude oil medium outlet.

[0007] A section of waveguide carrier tube is arranged in the crude oil medium isolation tube, the outer wall of the waveguide carrier tube is attached to the inner wall of the crude oil medium isolation tube, and the waveguide carrier tube is arranged with a cylindrical medium substrate layer and a medium shielding layer concentrically from inside to outside, the medium substrate layer and the medium shielding layer are embedded with a capacitor grid sheet one, a strip line detection sensor and a capacitor grid sheet two around the waveguide carrier tube from top to bottom, the capacitor grid sheet one and the capacitor grid sheet two are electrically connected to a capacitor grid integrated controller, and the capacitor grid integrated controller is electrically connected to a medium resonant filter, a detection circuit and an integrated mainboard in sequence.

[0008] The strip line detection sensor is electrically connected with a microwave integrated controller, the microwave integrated controller is electrically connected with an integrated mainboard, the integrated mainboard is electrically connected with an explosion-proof display control screen, a fine adjustment circuit system, an internal power supply, an output end of a temperature sensor, an input end of a radiator, a duplexer, and the duplexer is connected with a data remote transmission system.

[0009] Preferably, the material of the waveguide carrier pipe is polytetrafluoroethylene.

[0010] Preferably, the radiator is provided with a plurality of radiator and is fixedly connected to the inner wall of the waveguide choke explosion-proof control box.

[0011] Preferably, the dielectric resonant filter, the detection circuit, the microwave integrated controller, the fine adjustment circuit system, the internal power supply, the temperature sensor and the duplexer are fixedly arranged on the inner wall of the waveguide choke explosion-proof control box.

[0012] Preferably, the integrated mainboard is embedded in a metal plate, and the metal plate is rigidly connected with the crude oil medium isolation pipe.

[0013] Compared with the prior art, the crude oil water content online automatic detection device is installed on the oil extraction pipeline, and the water content information of the extracted crude oil is monitored in real time. BRIEF DESCRIPTION OF DRAWINGS

[0014] The application will be further described in detail below in combination with the drawings and specific embodiments:

[0015] Figure 1 is a schematic diagram of the three-dimensional structure of the application;

[0016] Figure 2 is a schematic diagram of the explosion structure of the application;

[0017] Figure 3 is a schematic diagram of the logic control connection structure of the application;

[0018] Figure 4 is a schematic diagram of the cross-sectional structure of the crude oil medium isolation pipe of the application. DETAILED DESCRIPTION

[0019] The application will be further described in detail below in combination with the drawings and specific embodiments:

[0020] An on-line automatic detection device for crude oil water content, comprising a waveguide choke explosion-proof control box 1, the waveguide choke explosion-proof control box 1 is in the shape of a rectangular parallelepiped, the front of the waveguide choke explosion-proof control box 1 is provided with an explosion-proof display control screen 2, the center between the upper and lower end faces of the waveguide choke explosion-proof control box 1 is provided with a crude oil medium isolation pipe 3, the top of the crude oil medium isolation pipe 3 is integrally connected with a crude oil pipeline connection flange plate one 4, and the bottom of the crude oil medium isolation pipe 3 is integrally connected with a crude oil pipeline connection flange plate two 5, the bottom of the crude oil medium isolation pipe 3 is provided with a pipeline crude oil medium oil inlet 6, and the top of the crude oil medium isolation pipe 3 is provided with a pipeline crude oil medium outlet 7.

[0021] The waveguide carrier pipe 8 is provided in the crude oil medium isolation pipe 3, the outer wall of the waveguide carrier pipe 8 is attached to the inner wall of the crude oil medium isolation pipe 3, and the waveguide carrier pipe 8 is internally embedded with a cylindrical medium substrate layer 9 and a medium shielding layer 10 concentric with the waveguide carrier pipe 8 from inside to outside, the medium substrate layer 9 and the medium shielding layer 10 are internally embedded with a capacitance grid piece one 11, a strip line detection sensor 12 and a capacitance grid piece two 13 around the waveguide carrier pipe 8 from top to bottom, the capacitance grid piece one 11 and the capacitance grid piece two 13 are electrically connected to a capacitance grid integrated controller 14, and the capacitance grid integrated controller 14 is electrically connected to a medium resonance filter 15, a detection circuit 16 and an integrated mainboard 17 in sequence.

[0022] The strip line detection sensor 12 is electrically connected to a microwave integrated controller 18, the microwave integrated controller 18 is electrically connected to the integrated mainboard 17, and the integrated mainboard 17 is electrically connected to the explosion-proof display control screen 2, a fine tuning circuit system 19, an internal power supply 20, an output end of a temperature sensor 21, an input end of a radiator 22, and a duplexer 23, and the duplexer 23 is connected to a data remote transmission system 24. The temperature sensor 21 monitors the temperature in the device and uploads the temperature signal to the integrated mainboard 17, and the integrated mainboard 17 controls the radiator 22 to open when the temperature is too high.

[0023] Further, the material of the waveguide carrier pipe 8 is polytetrafluoroethylene.

[0024] Further, the radiator 22 is provided with a plurality of fixed connections in the inner wall of the waveguide choke explosion-proof control box 1.

[0025] Further, the medium resonance filter 15, the detection circuit 16, the microwave integrated controller 18, the fine tuning circuit system 19, the internal power supply 20, the temperature sensor 21 and the duplexer 23 are fixedly arranged in the inner wall of the waveguide choke explosion-proof control box 1.

[0026] Further, the integrated mainboard 17 is embedded in a metal plate 25, and the metal plate 25 is rigidly connected with the crude oil medium isolation pipe 3.

[0027] The online automatic detection device of crude oil contains water, when installing, a section of the pipeline is intercepted on the crude oil conveying pipeline, which is the same size as the device, then the device is installed on the crude oil pipeline (note: cannot be welded with oil), then the flange plate welded on the crude oil main pipeline is connected with the corresponding flange plate 4 and flange plate 5 of the crude oil pipeline.

[0028] The crude oil thus extracted will flow through the waveguide carrier tube 8 of the device, which is provided with a capacitor grid piece 11, a stripline detection sensor 12 and a capacitor grid piece 2 13. The capacitor grid piece 1 1 and the capacitor grid piece 2 13 can scan fault water molecule data and their area, and the stripline detection sensor 12 scans fault crude oil molecule data and area. When the capacitor grid piece 1 1, the stripline detection sensor 12 and the capacitor grid piece 2 13 are excited by voltage, charges are generated on the capacitor grid piece 1 1, the stripline detection sensor 12 and the capacitor grid piece 2 13 through capacitive coupling, and then charges are output on the common receiving electrode through the capacitor.

[0029] The capacitor grid piece 1 1 and the capacitor grid piece 2 13 upload the water molecule data and their area scanned by each layer to the capacitor grid integrated controller 14. The capacitor grid integrated controller 14 collects the information and transmits it to the integrated mainboard 17 through the dielectric resonant filter 15 and the detection circuit 16 in turn. The integrated mainboard 17 calculates the water content of the crude oil through a specific function and displays the result on the explosion-proof display control screen 2. The integrated mainboard 17 is connected to the duplexer 23, which transmits the water content of the crude oil to the data remote system 24 such as mobile phones and computers through the 4G\5G wireless communication module.

[0030] The capacitor grid piece 1 1 and the capacitor grid piece 2 13 of the device can detect the signals of crude oil molecules and water molecules at a special frequency band of microwaves. Microwave transmission relies on the mutual induction of alternating electric field and alternating magnetic field to propagate. When microwaves pass through an electrolyte, the electrolyte is polarized, causing the attenuation of microwave energy. Therefore, the attenuation change value before and after the microwave passes through the crude oil to be measured can be measured to indirectly measure some properties of the crude oil.

[0031] The stripline detection sensor 12 can detect the dielectric constant of the oil-water mixture and upload it to the microwave integrated controller 18. The microwave integrated controller 18 calculates the dielectric constant of the oil-water two-phase flow using a specific function and establishes an oil-water mixed medium model. The microwave integrated controller 18 uploads the analyzed data to the integrated mainboard 17, which comprehensively processes the signals of crude oil molecules and water molecules collected by the capacitor grid piece 1 1 and the capacitor grid piece 2 13 and the signals of oil-water mixtures detected by the stripline detection sensor 12 to obtain the water content.

[0032] The present application adopts double capacitance grid sheet sensing technology, the capacitance grid sheet one 11 is used for stratified scanning crude oil flowing in the waveguide carrier pipe 8, the capacitance grid sheet one 11 measures the volume of crude oil to limit the effective data obtained after the stratified scanning of the capacitance grid sheet two 13, and then the effective data is used for operation, so that higher precision detection result is obtained; that is, the data measured by the capacitance grid sheet one 11 is used for screening the effective data transmitted by the capacitance grid sheet two 13 to the integrated mainboard 17, so that the detection precision of the water content of crude oil is further improved.

[0033] The present application is essentially to penetrate the oil sample by microwave sensing technology, to generate a three-dimensional model composed of oil molecules, water molecules and water-oil mixture by computer technology, and to calculate the water content in crude oil, so as to achieve the purpose of detection. The present application saves the sampling link, is installed on the oil production pipeline, and monitors the water content information of the produced crude oil in real time. The device is novel in design, simple in structure, safe and reliable, easy to install and maintain. Especially, the machine adopts capacitance grid detection technology, and the water content detection is not affected by changes in working conditions, medium viscosity, pressure and the like, ensuring the water content detection standard.

[0034] The specific implementation of the present application is described in detail above, but only as an example, the present application is not limited to the specific implementation cases described above, and equivalent modifications of the present application are also within the protection scope of the present application.

Claims

1. An on-line automatic water content detecting device for crude oil, characterized by comprising: The application relates to a waveguide choke explosion-proof control box (1), which is in the shape of a cuboid, the front face of the waveguide choke explosion-proof control box (1) is provided with an explosion-proof display control screen (2), a crude oil medium isolation pipe (3) is arranged between the upper and lower end faces of the waveguide choke explosion-proof control box (1), the top of the crude oil medium isolation pipe (3) is integrally connected with a crude oil pipeline connecting flange plate one (4), the bottom of the crude oil medium isolation pipe (3) is integrally connected with a crude oil pipeline connecting flange plate two (5), the bottom of the crude oil medium isolation pipe (3) is provided with a pipeline crude oil medium oil inlet (6), and the top of the crude oil medium isolation pipe (3) is provided with a pipeline crude oil medium outlet (7); The waveguide carrier pipe (8) is arranged in the crude oil medium isolation pipe (3), the outer wall of the waveguide carrier pipe (8) is attached to the inner wall of the crude oil medium isolation pipe (3), the waveguide carrier pipe (8) is internally embedded with, from inside to outside, a cylindrical medium substrate layer (9) and a medium shielding layer (10) which are concentric with the waveguide carrier pipe (8), the medium shielding layer (10) is arranged to prevent the crude oil medium from exuding, the medium substrate layer (9) and the medium shielding layer (10) are internally embedded with, from top to bottom, a capacitor grid piece one (11), a strip line detection sensor (12) and a capacitor grid piece two (13) which are arranged around the waveguide carrier pipe (8), the capacitor grid piece one (11) and the capacitor grid piece two (13) are electrically connected to a capacitor grid integrated controller (14), the capacitor grid integrated controller (14) is electrically connected to a medium resonance filter (15), a detection circuit (16) and an integrated mainboard (17) in sequence; The strip line detection sensor (12) is electrically connected to a microwave integrated controller (18), the microwave integrated controller (18) is electrically connected to the integrated mainboard (17), the integrated mainboard (17) is electrically connected to an explosion-proof display control screen (2), a fine adjustment circuit system (19), an output end of an internal power supply (20), a temperature sensor (21), an input end of a radiator (22) and a duplexer (23), and the duplexer (23) is connected to a data remote transmission system (24); The radiator (22) is arranged in a plurality of and fixedly connected to the inner wall of the waveguide choke explosion-proof control box (1); The medium resonance filter (15), the detection circuit (16), the microwave integrated controller (18), the fine adjustment circuit system (19), the internal power supply (20), the temperature sensor (21) and the duplexer (23) are fixedly arranged on the inner wall of the waveguide choke explosion-proof control box (1); The integrated mainboard (17) is embedded in a metal plate (25), and the metal plate (25) is rigidly connected with the crude oil medium isolation pipe (3).

2. The on-line automatic water content detection device for crude oil according to claim 1, characterized in that, The material of the waveguide carrier pipe (8) is polytetrafluoroethylene.

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