CN111790279A - A device for extracting and dissolving gas in oil - Google Patents

Abstract

The invention discloses a device for extracting and dissolving gas in oil, comprising: a tank body, a mechanical vacuum pump, a pressurizing system, and a gas filling system, wherein: the tank body is connected with a gas filling system, and the gas filling system is connected to the tank body. The cylinder gas on the system is connected to the tank body through the gas flow meter, gas solenoid valve and gas solenoid valve in the gas filling system; the top of the tank body is provided with a pressurizing system; the mechanical vacuum pump passes through the third gas solenoid valve The vacuum gauge is connected to the tank body; the waste liquid in the tank body is connected to the oil discharge port on the tank body through the third liquid two-way solenoid valve; the oil inlet pump is connected to the tank body through the liquid three-way solenoid valve oil outlet connection. In the embodiment of the present invention, a standard working fluid with the same oil and gas content as the equipment itself and suitable for online chromatograph calibration is formed, and the pressure of the entire system is adjusted by the piston pressurizing system, and standard working fluids of different concentrations can be prepared.

Description

A device for extracting and dissolving gas in oil

technical field

The invention relates to the technical field of gas extraction and dissolution, in particular to a device for extracting and dissolving gas in oil.

Background technique

Dissolved gases in insulating oil are analyzed by gas chromatography (DGA), which is recognized by countries around the world as the most effective method for monitoring and diagnosing early failures of oil-filled electrical equipment. With the advancement of live detection and condition maintenance, various detection devices for dissolved gas in insulating oil such as online monitoring and portable detection have been widely used. By preparing standard samples of insulating oil and using laboratory test data as the benchmark, these devices Carrying out network access inspection and regular inspection work has also received increasing attention from operation and management units. For the online chromatographic monitoring system installed on the transformer, the most basic thing is to evaluate the test accuracy of the online chromatograph in real time.

The analysis of dissolved gas in insulating oil requires the gas to be removed from the insulating oil. On the contrary, the preparation of standard working oil for insulating oil is the process of fully dissolving the gas in the insulating oil. The problem to be solved is how to accurately prepare the oil sample with the required concentration from the existing oil sample, and this involves the preparation of standard working oil.

Standard working oil is generally made of blank oil at normal pressure and a certain temperature. In the process of preparing standard oil, the gas content in the oil increases or even becomes saturated because the blank oil cannot be fully sealed, especially the CO contained in the air. , CO ₂ and other target gases affect the accuracy of standard oil preparation concentration. The gas content of the ideal standard working oil should be as consistent as possible with the body oil, which requires that the blank oil should be completely degassed as much as possible, and the gas content of the working oil should be adjusted by injecting the balance gas. In addition, the current preparation devices are all carried out under normal pressure, which makes it difficult to produce a high-concentration standard working solution or has poor accuracy.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the deficiencies of the prior art. The present invention provides a device for gas extraction and dissolving in oil, which solves the problem that blank oil with high gas content is transported to the preparation device, and is realized by vacuum pumping and internal circulation of oil. The problem of further degassing of the oil; adding standard gas can adjust the gas content of the oil and the concentration of the target components, and adjust the system pressure through the electric drive piston pressurizing system, and the oil inlet pump internally circulates the prepared standard liquid to complete Prepare high, medium and low concentration standard working solutions.

In order to solve the above technical problems, the embodiment of the present invention provides a device for extracting and dissolving gas in oil, including: a tank body, a mechanical vacuum pump, a pressurizing system, and a gas filling system, wherein:

The tank body is provided with an oil inlet, and the oil inlet pipeline connected to the oil inlet is connected with the tank body through a liquid three-way solenoid valve, an oil inlet pump, a liquid flowmeter, a first liquid two-way solenoid valve, and the liquid The two ends of the three-way solenoid valve control the oil inlet of the inlet pipeline, and the third end of the liquid three-way solenoid valve is connected to the oil discharge port on the tank body;

The tank body is connected with a gas filling system, and the cylinder gas on the gas filling system is connected to the tank body through a gas flow meter, a gas solenoid valve and a gas solenoid valve in the gas filling system;

The top of the tank is provided with a pressurization system;

The mechanical vacuum pump is connected to the tank body through a third gas solenoid valve and a vacuum gauge;

The oil outlet of the tank body is connected with the oil outlet of the tank body through an oil outlet pump, a second liquid two-way solenoid valve, a liquid flow meter;

The waste liquid in the tank body is connected with the oil discharge port on the tank body through the third liquid two-way solenoid valve;

The oil inlet pump is connected with the oil discharge port on the tank body through a liquid three-way solenoid valve;

A heating device is arranged in the tank body, a pressure sensor and an oil temperature probe are arranged on the tank body, and a thermal insulation material is arranged outside the tank body.

The heating device is arranged in an array structure, and the array heating device is provided with multiple layers and each layer is provided with a plurality of heating elements.

The vacuum gauge uses an ionization gauge.

The pressure releaser adopts a ruby high pressure releaser.

The pressurizing system adopts an electrically driven piston pressurizing system.

The gas filling system is provided with three independent gas filling pipelines.

The cylinder gas in the nitrogen cylinder on the first gas pipe is connected to the tank body through the first gas flow meter, the first gas solenoid valve, and the second gas solenoid valve;

The cylinder gas in the standard gas cylinder on the second gas pipe is connected to the tank through the second gas flow meter, the sixth gas solenoid valve, and the second gas solenoid valve;

The cylinder gas in the standard gas cylinder on the third gas pipe is connected with the tank body through the third gas flow meter, the fourth gas solenoid valve, and the second gas solenoid valve.

A fifth gas solenoid valve is also provided at the end of the gas circuit connection on the gas filling system.

The oil in the tank is circulated in the tank through the oil inlet pump, the liquid flow meter, the first liquid two-way solenoid valve, and the liquid three-way solenoid valve.

In the embodiment of the present invention, the device for degassing and dissolving the gas in the oil further degass the incoming high-gas-content oil through vacuuming and internal circulation, then adds standard gas, and adjusts the oil content by balancing gas. Gas volume, the entire system is repeatedly compressed by the electric drive piston pressurization system, and the high-speed disturbance of the oil pump during the internal circulation produces turbulent flow, so that the gas components are uniformly dissolved in the oil, and the standard working oil is obtained. It solves the problem of the accuracy of preparation of blank oil with high gas content; in addition, it realizes the accurate preparation of standard working oil with high, medium and low concentration.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic structural diagram of a device for gas extraction and dissolving in oil in an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Figure 1 shows a schematic diagram of the structure of the device for gas extraction and dissolution in oil in an embodiment of the present invention. The device structure for gas extraction and dissolution in oil includes: a tank 1, a pressurization system 2, an oil inlet pump 3, a liquid Flowmeter 4, liquid two-way solenoid valve 5, oil temperature probe 6, pressure sensor 7, vacuum gauge 8, gas solenoid valve 9, mechanical vacuum pump 10, gas solenoid valve 11-13, gas flow meter 14-16, liquid two-way Solenoid valve 17-18, liquid three-way solenoid valve 19, oil outlet pump 20, liquid flow meter 21, heating device 22, pressure releaser 23, nitrogen cylinder 24, standard gas cylinder 25-26, gas solenoid valve 27-28.

The tank body 1 is a relatively sealed space, and the tank body 1 is provided with an oil inlet. The oil inlet pipeline connected to the oil inlet passes through the liquid three-way solenoid valve 19, the oil inlet pump 3, the liquid flow meter 4, and the first liquid two. The solenoid valve 5 and the tank body 1 are connected together. The two ends of the liquid three-way solenoid valve 19 control the oil inlet of the inlet pipeline. The third end of the liquid three-way solenoid valve 19 is connected to the oil outlet on the tank body 1. connected.

The gas filling system is provided with three independent gas filling pipelines, wherein: the cylinder gas in the nitrogen cylinder 24 on the first gas filling pipe passes through the first gas flow meter 14, the first gas solenoid valve 11, the second gas solenoid valve 28 and the tank. Body 1 is connected. The cylinder gas in the standard gas cylinder 25 on the second gas pipe is connected to the tank 1 through the second gas flow meter 15 , the sixth gas solenoid valve 12 and the second gas solenoid valve 28 . The cylinder gas in the standard gas cylinder 26 on the third gas pipe is connected to the tank body 1 through the third gas flow meter 15 , the fourth gas solenoid valve 13 and the second gas solenoid valve 28 . A fifth gas solenoid valve 27 is also provided at the end of the gas circuit connection on the gas filling system.

The mechanical vacuum pump 10 is connected to the tank body 1 through the third gas solenoid valve 9 and the vacuum gauge 8; the top of the tank body 1 is provided with a pressurizing system 2; the pressure releaser 23 is connected to the tank body 1; the oil outlet passes through The oil outlet pump 20, the second liquid two-way solenoid valve 18, the liquid flow meter 21 are connected to the oil discharge port on the tank body 1; the waste liquid on the oil discharge port passes through the third liquid two-way solenoid valve 17 and the tank body 1. The oil port is connected; the oil inlet pump 3 is connected to the oil discharge port on the tank body 1 through the liquid three-way solenoid valve 19; the tank body 1 is provided with a heating device 22, and the tank body 1 is provided with a pressure sensor 7, The oil temperature probe 6 is provided with thermal insulation material outside the tank body 1 .

The heating device 22 is arranged in an array structure, and the array heating device 22 is provided with multiple layers and each layer is provided with a plurality of heating elements.

The vacuum gauge 8 uses an ionization gauge.

The pressure release device 23 is a ruby high pressure release device.

The pressurizing system 2 adopts an electrically driven piston pressurizing system.

The oil in the embodiment of the present invention can realize the internal circulation between the oil inlet and the oil outlet through the oil inlet pump 3, the liquid flow meter 4, the first liquid two-way solenoid valve 5, and the liquid three-way solenoid valve 19, thereby realizing Circulation in the tank.

The tank body 1 is also provided with a third liquid two-way solenoid valve 17. The third liquid two-way solenoid valve 17 controls the discharge of waste liquid in the tank body 1. The third liquid two-way solenoid valve 17 is located in the tank body. The bottom of the tank 1 ensures that the waste liquid can easily flow out from the bottom of the tank body 1, and the bottom of the tank body 1 has a waste liquid discharge port.

In the specific implementation process, when making standard working oil, start the heating device to heat up to the set value, start the vacuum pump to vacuum the tank, start the oil inlet pump to input oil, and start the internal circulation after reaching a certain volume, so that the oil is in the vacuum tank. The body is further degassed; after adding the standard gas, the electric drive piston pressurizing device is started to adjust the system pressure repeatedly, and the internal circulation is started at the same time, so that the oil and gas are mixed and stirred in the circulation space, and the oil and gas are compressed several times in the tank. and diffusion, thereby dissolving the gas in the oil. It should be noted that the tank pressure is finally maintained at a constant value and output.

The specific implementation process is as follows:

(1) Set the heating temperature of the tank to be 50°C, start the heating device 22, and raise the temperature in the tank 1 to the set value;

(2) After opening the vacuum gauge 8 and the gas solenoid valve 9, start the vacuum pump 10 to vacuumize the tank 1;

(3) After the temperature rises to the set value, open the liquid three-way solenoid valve 19, start the oil inlet pump 3, open the liquid two-way solenoid valve 5 and the liquid flowmeter 4 at the same time, and switch the liquid three-way solenoid valve 19 after the oil is fed. Internal circulation degassing;

(4) After the degassing is completed, stop the oil feed pump 3 and the vacuum pump 10, close the liquid two-way solenoid valve 5, the liquid flow meter 4, the liquid three-way solenoid valve 19, and the gas solenoid valve 9;

(5) Open the nitrogen cylinder 24, the gas flow meter 14, the gas solenoid valve 11, and the gas solenoid valve 27, and close the pipeline after purging;

(6) open one channel of standard gas (this example takes standard gas cylinder 25 as an example) cylinder 25, gas flow meter 15, gas solenoid valve 12, gas solenoid valve 28, add gas to the set value and close;

(7) Start the pressurization 2 system to pressurize the system, open the liquid three-way solenoid valve 19, the liquid two-way solenoid valve 5, and the liquid flowmeter 4 at the same time, and start the oil inlet pump 3 for circulation, so that the oil and gas are compressed and diffused many times. , turn off the gas after dissolving it in the oil.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium can include: Read only memory (ROM, ReadOnly Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc.

In addition, the above embodiments of the present invention have been introduced in detail, and specific examples should be used in this paper to illustrate the principles and implementations of the present invention, and the descriptions of the above embodiments are only used to help understand the method of the present invention and its core idea; Meanwhile, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scope. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (9)

1. An apparatus for stripping and dissolving gas in oil, comprising: jar body, mechanical vacuum pump, pressurization system, air entrainment system, wherein:

an oil inlet is formed in the tank body, an oil inlet pipeline connected with the oil inlet is connected with the tank body through a liquid three-way electromagnetic valve, an oil inlet pump, a liquid flow meter and a first liquid two-way electromagnetic valve, oil inlet of the inlet pipeline is controlled by two ends of the liquid three-way electromagnetic valve, and a third end of the liquid three-way electromagnetic valve is connected with an oil outlet in the tank body;

the tank body is connected with a gas filling system, and a steel cylinder gas on the gas filling system is connected with the tank body through a gas flowmeter, a gas electromagnetic valve and a gas electromagnetic valve in the gas filling system;

a pressurizing system is arranged at the top of the tank body;

the mechanical vacuum pump is connected with the tank body through a third gas electromagnetic valve and a vacuum gauge;

the oil outlet of the tank body is connected with the oil outlet of the tank body through an oil outlet pump, a second liquid two-way electromagnetic valve, a liquid flow meter and an oil outlet of the tank body;

the waste liquid in the tank body is connected with an oil discharge port on the tank body through a third liquid two-way electromagnetic valve;

the oil inlet pump is connected with an oil outlet on the tank body through a liquid three-way electromagnetic valve;

the heating device is arranged in the tank body, the pressure sensor and the oil temperature probe are arranged on the tank body, and the heat insulation material is arranged outside the tank body.

2. The gas stripping and oil dissolving apparatus of claim 1 wherein the heating means is arranged in an array configuration with multiple layers and multiple heating elements per layer.

3. The apparatus for degassing and dissolving a gas in oil of claim 1 wherein said vacuum gauge comprises an ionization gauge.

4. The gas evolving and oil dissolving apparatus of claim 1 wherein said pressure release is a ruby high pressure release.

5. The apparatus for degassing and dissolving a gas in oil of claim 1 wherein said pressurization system comprises an electrically driven piston pressurization system.

6. The apparatus for stripping and dissolving gas in oil as claimed in claim 1, wherein said gas-filling system is provided with three independent gas-filling lines.

7. The apparatus for stripping and dissolving gas in oil as claimed in claim 6, wherein the cylinder gas in the nitrogen cylinder on the first gas filling pipe is connected to the tank through a first gas flow meter, a first gas solenoid valve, a second gas solenoid valve;

the steel cylinder gas in the standard gas steel cylinder on the second gas filling pipe is connected with the tank body through a second gas flowmeter, a sixth gas electromagnetic valve and a second gas electromagnetic valve;

and the steel cylinder gas in the standard gas steel cylinder on the third gas filling pipe is connected with the tank body through a third gas flowmeter, a fourth gas electromagnetic valve and a second gas electromagnetic valve.

8. The apparatus for stripping and dissolving gas in oil as claimed in claim 6, wherein the gas-filling system is further provided with a fifth gas solenoid valve at the end of the gas path connection.

9. The apparatus for degassing and dissolving a gas in oil as claimed in claim 1, wherein the oil in said tank is circulated in said tank by an oil feed pump, a liquid flow meter, a first liquid two-way solenoid valve, and a liquid three-way solenoid valve.

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