Rapid detection device for water content of oil

Abstract

According to the rapid detection device for the water content of the oil liquid, the water content of the oil liquid is rapidly detected through a microwave method, and the characteristic speed is high; self-calibration is carried out on the microwave method by utilizing high precision of the spectrum method, so that the water content can be measured at high precision through the spectrum absorption effect of the gas after the water of the measured liquid is fully evaporated; the two methods are combined, a microwave method test result is calibrated according to an infrared spectroscopy test result, a formation correction coefficient of the microwave method result capable of being rapidly measured is formed, the advantage of rapid response of the microwave method is exerted, and the integrated rapid detection device is formed.

Description

Technical Field

[0001] The present invention relates specifically to the field of petrochemical industry, and in particular to a device for quickly detecting the water content in oil. Background Art

[0002] With the development of the times and social progress, people's use of and attention to oil is increasing. Research has found that factors affecting the performance and stability of oil supply systems include contamination such as microscopic water particles. Oil is widely used in various fields in daily life, such as the automotive, power, chemical, and food industries. Therefore, scientific and reasonable measurement of the water content of common oil types is crucial. Therefore, rapid self-calibration testing of minute water content in oil is a key focus.

[0003] Among the existing technologies for detecting water content in oil, one commonly used method is to evaporate the water inside the crude oil for measurement. However, this technical method has the disadvantages of poor detection accuracy and inconvenient operation. Another commonly used method is the microwave method, which is heavily dependent on the measurement accuracy and stability of electronic and power facilities and equipment. Therefore, this new application intends to reasonably combine the two to improve the accuracy and stability of the oil water content detection device.

[0004] The advantages of microwave moisture measurement include fast measurement speed, high accuracy, non-invasiveness, and unaffected by the color and transparency of the measured medium. However, its disadvantages include susceptibility to interference from the surrounding environment and the need for shielding and anti-interference measures. Infrared spectroscopy offers high measurement accuracy, but requires heating the oil to convert it into gas, leading to longer waiting times for test results. Utility Model Content

[0005] This new method aims to solve the problem of accuracy when using microwaves alone to detect the water content in oil, and solve the problem that when using infrared spectroscopy alone to detect the water content in oil, it takes a long time to detect the water content due to the need to heat the gas in the gas chamber.

[0006] In order to solve the above problems, this application is implemented through the following technical solutions:

[0007] A device for quickly detecting water content in oil comprises an oil pipeline, one end of which is provided with a suction port, the suction port being fixedly connected to a microwave sensor, the microwave sensor being connected to a data acquisition unit via a data line, and the data acquisition unit being connected to an electronic control module via a data line.

[0008] The other end of the oil pipeline is connected to the sampling port of the quantitative pump, the output end of the quantitative pump is connected to the inlet of the heating furnace, the output end of the heating furnace is connected to the inlet of the fine filter, the output end of the fine filter is connected to one end of the air pump, and the air pump outlet is connected to the air chamber.

[0009] The data acquisition unit is connected to the calibration analyzer via a data line, and the calibration analyzer is connected to the receiver via a data line.

[0010] The air chamber is arranged between the infrared transmitter and the receiver.

[0011] A moisture content tester is provided at the bottom of the microwave sensor. A microwave generator is installed inside the moisture content tester. The output end of the microwave generator is connected to the power divider through a data line.

[0012] The power divider is connected to the microwave transmitting probe via a data line, the power divider is connected to the detector via a data line, one end of the detector is connected to the microwave receiving probe via a data line, and the microwave transmitting probe and the microwave receiving probe are installed in the oil pipeline.

[0013] The side wall of the air chamber is made of infrared optically transparent material, and the photosensitive sheet in the material is lithium tantalate pyroelectric material.

[0014] The air outlet of the air chamber is connected to the exhaust gas collector.

[0015] The electronic control module is also connected to an infrared emitter via a data line.

[0016] Compared with the existing technology, the beneficial effects of this new technology are:

[0017] This new device is used to quickly detect the water content in oil, using microwave radiation to measure the water content for a preliminary determination. First, a microwave signal is transmitted into the measured medium via a transmitting probe, and then the reflected microwave signal is received by a receiving probe. Due to the varying dielectric constants and conductivity of the measured medium, the intensity attenuation value A and phase shift P of the reflected microwave signal will vary. By measuring these changes, the water content of the measured medium can be calculated.

[0018] 2. This new method combines the two methods, calibrates the microwave method through spectroscopy to form a correction coefficient, and then takes advantage of the fast response of the microwave method to form a rapid detection capability.

[0019] 3. This new method and device for rapid self-calibration of minute water content in oil is simple and has a wide range of applications. It can be widely used in the maintenance and calibration of petrochemical and large-scale lubricating water content equipment.

[0020] 4. This novel invention aims to propose a method and device for rapid self-calibration detection of minute water content in oil. First, the microwave method is used to rapidly detect the water content in the oil, and the output value is a current value, which is characterized by high speed. Second, the spectral method with high water content measurement accuracy is used to calibrate the water content measured by the microwave method, so that the water therein can be fully evaporated. The two methods are combined, and the microwave method is calibrated by the spectral method to form a correction coefficient. Then, the advantage of the fast response of the microwave method is utilized. Under the same conditions, the water content detected by the microwave method is fitted with the water content detected by the infrared method to obtain a correction relationship applicable to the entire water content range of the two methods. After the microwave method is used to rapidly measure the water content, the correction relationship is brought into play to correct the water content. Finally, an accurate value equivalent to the water content measured by infrared spectroscopy under the same conditions is obtained; thus, a device for rapidly and accurately detecting the water content in oil is formed.

[0021] 5. The fitting relationship obtained by this calibration method, combined with the microwave water measuring device in this new model, saves the time for infrared preheating and insulation, and obtains the test results of the water content in the oil quickly and accurately. The measurement result is shorter than that obtained by directly using the infrared method. Compared with directly using the microwave method to measure the water content, the accuracy is higher. It can also increase the service life of the quantitative pump in the infrared water measuring instrument. When the probe of the water content tester is immersed in oil for a long time, the accuracy will decrease, resulting in the need to regularly check and calibrate the transmitting probe and the receiving probe. The new model can solve the probe accuracy problem of the water content tester by recalibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of a rapid detection device for water content in oil;

[0023] Figure 2 This is an enlarged schematic diagram of the oil water content rapid detection device A;

[0024] Figure numerals: oil pipeline 1, suction port 101, microwave sensor 2, tester 201, microwave generator 2011, detector 2013, power splitter 2012, transmitting probe 202, receiving probe 203; data acquisition unit 3, electronic control module 4, calibration analyzer 5, receiver 6, metering pump 7, heating furnace 8, fine filter 9, air pump 10, air chamber 11, exhaust gas collector 12, infrared transmitter 13. DETAILED DESCRIPTION

[0025] The microwave sensor 2, data acquisition unit 3, electronic control module 4, calibration analyzer 5, receiver 6, quantitative pump 7, heating furnace 8, air pump 10, and infrared transmitter 13 in the present invention are all powered by an external power supply; the electronic control module 4 controls the power switches of the data acquisition unit 3, calibration analyzer 5, receiver 6, quantitative pump 7, heating furnace 8, air pump 10 and infrared transmitter 13 through a data line.

[0026] Preferably, the microwave sensor 2 is the Guangyan GTIO-1501; the microwave generator 2011 is the Beijing Dahua solid-state microwave signal source, model DH1121C; the power divider 2012 is the Antema rectangular waveguide BJ-100; the detector 2013 is the Guangyan detector diode 2DV27; the data acquisition unit 3 is the VK10X charge amplifier; the electronic control module 4 is an STM32-based electronic control device; the calibration analyzer 5 is preferably a host computer program written in C++ and an industrial computer; the receiver 6 is preferably an infrared receiver DIP-3; the pyroelectric material is preferably a 2×1 mm detection element made of lithium tantalate material with a high pyroelectric coefficient. Preferably, the AGA2000d infrared analyzer provided by Aiyi Technology Co., Ltd. is used.

[0027] Example 1

[0028] The connection diagram of each component of the oil water content rapid detection device is as follows Figure 1 and Figure 2 shown.

[0029] A rapid detection device for water content in oil comprises an oil pipeline 1. One end of the oil pipeline 1 is provided with a suction port 101, which is fixedly connected to a microwave sensor 2. The microwave sensor 2 is connected to a data acquisition unit 3 via a data cable. The data acquisition unit 3 is connected to an electronic control module 4 via a data cable. The electronic control module 4 is also connected to an infrared transmitter 13 via a data cable. The other end of the oil pipeline 1 is connected to the inlet of a metering pump 7. The output end of the metering pump 7 is connected to the inlet of a heating furnace 8. The output end of the heating furnace 8 is connected to the inlet of a fine filter 9. The output end of the fine filter 9 is connected to one end of an air pump 10. The outlet of the air pump 10 is connected to an air chamber 11, and the outlet of the air chamber 11 is connected to an exhaust gas collector 12. The data acquisition unit 3 is connected to a calibration analyzer 5 via a data cable, which is in turn connected to a receiver 6 via a data cable. The air chamber 11 is disposed between the infrared transmitter 13 and the receiver 6. The infrared transmitter 13 emits infrared light, enabling the receiver 6 to receive the light signal transmitted by the infrared transmitter 13 through the air chamber 11.

[0030] Microwave sensor 2 is equipped with a moisture content meter 201 at its base. Moisture content meter 201 houses a microwave generator 2011. The output of microwave generator 2011 is connected via a data cable to a power splitter 2012, which in turn is connected via a data cable to a microwave transmitter probe 202. This is in turn connected via a data cable to a detector 2013, which in turn is connected via a data cable to a microwave receiver probe 203. Microwave transmitter probe 202 and microwave receiver probe 203 are installed within oil pipeline 1. The sidewalls of gas chamber 11 are made of infrared optically transparent material, and the photosensitive sheet is a pyroelectric material.

[0031] A calibration method for a rapid detection device for water content in oil comprises the following steps:

[0032] S1, turn on the electronic control module 4, and inject oil with different water contents into the oil pipeline 1 in batches;

[0033] S1.1, water content tester 201 measures the mass water content η through the attenuation value A and phase shift P of different oils w , transmitted back to the data acquisition unit 3 through the microwave sensor 2;

[0034] S1.2, the receiver 6 transmits the infrared signals of the oil with different water contents to the calibration analyzer 5; the calibration analyzer 5 converts the infrared signals into mass water content y by infrared method and transmits them to the data acquisition unit 3;

[0035] S2, the collection unit 3 collects the moisture content η in step S1.1 w Fitting the mass moisture content y in step S1.2 to obtain the relationship between y and η w The linear first-order calibration equation of .

[0036] By the above method, the infrared spectroscopy and microwave method measurement results are fitted, and the infrared spectroscopy measurement value with high precision and slow test speed is used as the calibration value y, and the microwave method measurement value with low precision and fast test speed is used as the calibration value η. w , measure multiple groups of different water-containing oil test samples in sequence, and calculate y and η by the least squares method w The functional relationship does not exceed the second order. After correction, the microwave method can form a detection capability with high accuracy and fast measurement speed.

[0037] The preferred instrument model in this embodiment is a matching power supply and circuit, but this does not limit the present invention to the use of instruments or components of this model. For those skilled in the art, other different types of component models can also be used to obtain a fitting relationship suitable for the corresponding oil. The parts not mentioned in the device of this novel are all existing technologies and will not be described in detail. Electronic components that are connected by data line control can also be connected wirelessly; improvements to these technical solutions all fall within the scope of protection of this novel.

Claims

1. A device for quickly detecting the water content in oil, comprising an oil pipeline (1), characterized in that: One end of the oil pipeline (1) is provided with a suction port (101), the suction port (101) is fixedly connected to the microwave sensor (2), the microwave sensor (2) is connected to the data acquisition unit (3) via a data line, and the data acquisition unit (3) is connected to the electronic control module (4) via a data line. The other end of the oil pipeline (1) is connected to the inlet of the quantitative pump (7), the output end of the quantitative pump (7) is connected to the inlet of the heating furnace (8), the output end of the heating furnace (8) is connected to the inlet of the fine filter (9), the output end of the fine filter (9) is connected to one end of the air pump (10), and the air outlet of the air pump (10) is connected to the air chamber (11).

2. The device for rapid detection of water content in oil according to claim 1, characterized in that: The data acquisition unit (3) is connected to the calibration analyzer (5) via a data line, and the calibration analyzer (5) is connected to the receiver (6) via a data line.

3. The oil water content rapid detection device according to claim 1, characterized in that: The air chamber (11) is arranged between the infrared transmitter (13) and the receiver (6).

4. The device for rapid detection of water content in oil according to claim 1, characterized in that: A moisture content tester (201) is provided at the bottom of the microwave sensor (2), a microwave generator (211) is installed inside the moisture content tester (201), and an output end of the microwave generator (2011) is connected to a power divider (212) via a data line.

5. The device for rapid detection of water content in oil according to claim 4, characterized in that: The power divider (2012) is connected to the microwave transmitting probe (202) via a data line, the power divider (2012) is connected to the detector (2013) via a data line, one end of the detector (2013) is connected to the microwave receiving probe (203) via a data line, and the microwave transmitting probe (202) and the microwave receiving probe (203) are installed in the oil pipeline (1).

6. The device for rapid detection of water content in oil according to claim 1, characterized in that: The side wall of the gas chamber (11) is made of infrared optically transparent material, and the photosensitive sheet in the material is lithium tantalate pyroelectric material.

7. The device for rapid detection of water content in oil according to claim 1, characterized in that: The air outlet of the air chamber (11) is connected to the exhaust gas collector (12).

8. The device for rapid detection of water content in oil according to claim 1, characterized in that: The electric control module (4) is also connected to an infrared emitter (13) via a data line.

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