CN111562188A - High-pressure high-flow-rate circulation two-phase flow erosion rate experimental device and experimental method - Google Patents
High-pressure high-flow-rate circulation two-phase flow erosion rate experimental device and experimental method Download PDFInfo
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Abstract
The invention provides a high-pressure high-flow-rate circulation two-phase flow erosion rate experimental device and an experimental method, and belongs to the technical field of erosion rate analysis. The device includes the gas cylinder, the booster pump, the autoclave, the fan, the experiment section, including a motor, an end cap, a controller, and a cover plate, magnetic drive device, a weighing sensor and a temperature sensor, pressure sensor, the flowmeter, vapour and liquid separator, the trap, the liquid storage pot, liquid plunger pump, high pressure nozzle, sample relief valve and discharge valve, set up the fan in the autoclave, advance of fan, experiment section fan is connected to the outlet duct, liquid passes through plunger pump and high pressure nozzle and gets into the experiment section in the liquid storage pot, the experiment section passes through flange access pipeline return circuit, the fan axis of rotation links to each other with magnetic drive device. The device has the advantages of simple equipment, low manufacturing cost, low energy consumption and simple and convenient operation, and the method can simulate the erosion condition of the pipeline steel in the high-pressure high-flow-rate two-phase flow erosion environment and measure the erosion rate under different conditions.
Description
Technical Field
The invention relates to the technical field of erosion rate analysis, in particular to a high-pressure high-flow-rate circulation two-phase flow erosion rate experimental device and an experimental method.
Background
With the research on the problem of two-phase flow erosion, the problem of two-phase flow erosion under severe working conditions is more and more emphasized. At present, most of experimental devices used in the research of two-phase flow erosion behaviors are pipeline loops or high-pressure kettles provided with rotating disc simulated erosion devices, and the devices are difficult to realize the consideration of high-pressure environment and high-flow-rate environment, and cannot really and effectively evaluate the erosion rate and the erosion resistance of steel in the high-pressure high-flow-rate two-phase flow environment.
At present, the following defects exist in the existing two-phase flow erosion device:
(1) the two-phase flow erosion pipeline loop device is difficult to meet the requirements of a high-pressure environment, and the erosion characteristics under the high-pressure environment cannot be truly simulated.
(2) High flow rates are difficult to achieve with rotating disk devices in autoclaves and fluid flow patterns cannot be well simulated.
Disclosure of Invention
The invention provides a high-pressure high-flow-rate circulation two-phase flow erosion rate experimental device and an experimental method aiming at the defects of the existing two-phase flow erosion experimental device and experimental method.
The device comprises a gas cylinder, a booster pump, a kettle body, a fan, an experiment pipe section, a motor, a magnetic drive device, a temperature sensor, a pressure sensor A, a pressure sensor B, a pressure sensor C, a gas flowmeter, a gas-liquid separator, a drain valve, a liquid storage tank, a plunger pump, a high-pressure nozzle, a safety valve A, a safety valve B and an exhaust valve, wherein the fan is arranged in the kettle body, an electric heating system is arranged at the lower part of the kettle body, the safety valve A is arranged on an exhaust pipe of the kettle body, an air inlet pipe and an air outlet pipe of the fan are connected with the experiment pipe section to form a circulating flowing pipeline loop, liquid in the liquid storage tank enters the experiment pipe section through the plunger pump and the high-pressure nozzle, a stop valve C is arranged between the liquid storage tank and the plunger pump, the pressure sensor B and the check valve, gas-liquid two-phase flow passes through the gas-liquid separator after passing through the experiment pipeline section, gas continues to circulate after returning to the fan pressure boost, liquid returns to the liquid storage pot through the drain valve, the experiment pipeline section passes through flange access pipeline return circuit, the fan axis of rotation links to each other with magnetic drive device, the motor provides power for magnetic drive device, set up pressure sensor C before the experiment pipeline section, temperature sensor and gas flowmeter, cauldron body air inlet sets up the booster pump, set up pressure sensor A between booster pump and the cauldron body, check valve A and stop valve B, the booster pump is connected to the gas cylinder, set up stop valve A between gas cylinder and the booster pump, the pipeline between fan and the high pressure nozzle is opened there is the branch road, set.
The fan is connected with the gas circulation loop through the gas inlet and outlet holes on the kettle cover of the kettle body, and the air inlet of the fan is directly connected with the interior of the kettle body so as to keep the pressure in the pipe and the pressure in the kettle body balanced.
The test tube section is internally provided with a sample groove for mounting a sample, the sample is designed to be attached to the sample groove, and the two sections after being loaded into the sample groove are sealed by a sealing gasket.
The intake pipe of fan and outlet duct pipeline internal diameter are 50mm, and the pipeline internal diameter of experiment pipeline section is 25mm, uses reducing interface connection between the intake pipe of fan and outlet duct and the experiment pipeline section to guarantee to reach the high velocity of flow of experiment pipeline section department air current.
The whole device is made of 316L stainless steel materials, the pressure range of the device is 0.1-30 MPa, and the temperature range of fluid in the device is 0-120 ℃.
The fan keeps the balance of the internal pressure and the external pressure by the kettle body and is supplied with heat by an electric heating system.
The gas medium component provided by the gas cylinder includes but is not limited to CO2、N2。
The samples are of different grades of steel or other metals.
The motor is stepless speed regulation.
The method applying the invention comprises the following steps:
s1: loading liquid used for the experiment into a liquid storage tank, loading a sample into a sample groove in a test pipe section, loading the test pipe section into a gas loop and sealing;
s2: opening a stop valve A, a stop valve B and a booster pump, boosting the pressure in the pipeline system to 1MPa, closing the stop valve B and the booster pump, opening an exhaust valve, repeating for 3 times, finishing the replacement of gas in the system by experimental gas, and closing the exhaust valve;
s3: opening the stop valve B and the booster pump, introducing the required gas into the kettle body and the pipeline, and closing the stop valve B after the required pressure is reached;
s4: setting the temperature of an electric heating system, starting a motor, controlling the flow rate of gas in a pipeline through the speed of the motor, opening a drain valve and a stop valve C, opening a plunger pump to enable liquid to enter a loop, and starting a two-phase flow erosion experiment;
s5: after the experiment is finished, firstly, the power supply of the motor and the electric heating system are closed, the exhaust valve is opened, the experiment pipe section is taken out after the system is decompressed, and the sample is taken out;
s6: and (4) treating and cleaning the corrosive medium in the circulation loop.
The technical scheme of the invention has the following beneficial effects:
(1) the experimental device is simple in equipment, low in cost and energy consumption and simple and convenient to operate in the same high-pressure high-flow-rate environment;
(2) the device can effectively control parameters such as pressure, temperature, flow velocity and the like of the two-phase flow;
(3) the experimental method can simulate the erosion condition of the material in high-pressure high-flow-rate two-phase flow, and measure the erosion rate and the erosion resistance evaluation of the material under the conditions of different temperatures, pressures, flow rates, erosion angles, medium components and the like.
Drawings
FIG. 1 is a schematic structural flow diagram of a high-pressure high-flow-rate circulation two-phase flow erosion rate experimental device according to the present invention;
FIG. 2 is a schematic top view of an experimental pipe section of the high-pressure high-flow-rate circulation two-phase flow erosion rate experimental device of the present invention, wherein (a) is a sample clamp and (b) is a sample;
FIG. 3 is a front view of the experimental pipe section of the high-pressure high-flow-rate circulation two-phase flow erosion rate experimental device of the present invention, wherein (a) is the experimental pipe section and (b) is the sample.
Wherein: the device comprises a gas cylinder 1, a stop valve 2, a stop valve A, a booster pump 3, a pressure sensor 4, a check valve A5, a stop valve B6, a kettle 7, a fan 8, an electric heating system 9, a motor 10, a safety valve A11, a magnetic driving device 12, a temperature sensor 13, a high-pressure nozzle 14, a reducing joint 15, a gas flowmeter 16, an experimental pipe section 17, a reducing joint 18, a gas-liquid separator 19, a drain valve 20, a pressure sensor C21, a liquid storage tank 22, a stop valve C23, a plunger pump 24, a pressure sensor B25, a check valve B26, a safety valve B27 and a vent valve 28.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a high-pressure high-flow-rate circulation two-phase flow erosion rate experimental device and an experimental method.
As shown in figure 1, the device comprises an air bottle 1, a booster pump 3, a kettle body 7, a fan 8, an experiment pipe section 17, a motor 10, a magnetic driving device 12, a temperature sensor 13, a pressure sensor C21, a gas flowmeter 16, a gas-liquid separator 19, a drain valve 20, a liquid storage tank 22, a plunger pump 24, a high-pressure spray head 14, a sample safety valve and an exhaust valve 28, wherein the fan 8 is arranged in the kettle body 7, an electric heating system 9 is arranged at the lower part of the kettle body 7, a safety valve A11 is arranged on an exhaust pipe of the kettle body 7, an air inlet of the fan 8 is directly connected with the interior of the kettle body 7, a magnetic coupler is adopted for connecting a fan blade and the motor 10 without being matched with a traditional mechanical shaft seal, the rotating torque force of the motor drives the blade to work and operate through the attraction of active magnetism and the passive magnetism, an air inlet pipe and an air outlet pipe of the fan 8 are connected with the, the liquid injection amount of an experimental section is accurately controlled by using a liquid plunger pump, high-pressure high-flow-rate gas-liquid two-phase fluid is circularly conveyed to an experimental pipe section 17, a stop valve C23 is arranged between a liquid storage tank 22 and the plunger pump 24, a pressure sensor B25 and a check valve B26 are arranged between the plunger pump 24 and a high-pressure nozzle 14, a reducing joint A15 is arranged between the high-pressure nozzle 14 and the experimental pipe section 17, a reducing joint B18 is arranged between the experimental pipe section 17 and a gas-liquid separator 19, the gas-liquid two-phase fluid passes through the experimental pipe section 17 and then passes through the gas-liquid separator 19, the gas returns to a fan 8 for pressurization and then continues to circulate, the liquid returns to the liquid storage tank 22 through a drain valve 20, the experimental pipe section 17 is connected to a pipeline loop through a flange, the rotating shaft of the fan 8 is connected with a, the air inlet of the kettle body 7 is provided with a booster pump 3, a check valve A5 and a stop valve B6 are arranged between the booster pump 3 and the kettle body 7, and the gas bottle 1 provides a gas source for the experiment.
As shown in fig. 2 and 3, a sample tank for installing a sample is arranged in the experiment pipe section 17, the sample is designed to be attached to the sample tank, and two sections after the sample tank is installed are sealed by a sealing gasket.
The inner diameters of the air inlet pipe and the air outlet pipe of the fan 8 are 50mm, the inner diameter of the pipeline of the experiment pipe section 17 is 25mm, and the air inlet pipe and the air outlet pipe of the fan 8 are connected with the experiment pipe section through reducing interfaces.
The whole device is made of 316L stainless steel materials, the pressure range of the device is 0.1-30 MPa, and the temperature range of fluid in the device is 0-120 ℃.
The fan 8 keeps the balance of the internal pressure and the external pressure by the kettle body 7 and is supplied with heat by an electric heating system 9.
The gas medium component provided by the gas cylinder 1 includes but is not limited to CO2、N2。
The samples are of different grades of steel or other metals.
The motor 10 is stepless speed-regulating.
The following description is given with reference to specific examples.
Example 1
The invention is further explained by taking the example of simulating the erosion condition of the injection and production well of the gas storage under the influence of pressure and measuring the erosion rate of the material under different pressures. Wherein the erosion medium is gas phase of 94% CH4，6％CO2The liquid phase is water; the material was N80 steel, and the experimental temperature was 80 ℃.
As shown in fig. 1, the experimental device is composed of a gas cylinder 1, a booster pump 3, a kettle body 7, a fan 8, an experimental section 17, a motor 10, a magnetic driving device 12, a temperature sensor 13, a pressure sensor C21, a gas flowmeter 16, a gas-liquid separator 19, a drain valve 20, a liquid storage tank 22, a liquid plunger pump 24, a high-pressure spray head 14, a sample safety valve and an exhaust valve 28, wherein the fan 8 is installed in the kettle body 7, and a gas inlet pipe and a gas outlet pipe of the fan 8 are connected with the experimental section fan to form a sealed pipeline loop of circulating flow. Water in the liquid storage tank 22 enters the experimental section 17 through the plunger pump 24 and the high-pressure spray head 14, gas-liquid two-phase flow passes through the experimental section 17 and then passes through the gas-water separator 19, the gas returns to the fan 8 to be pressurized and then continues to circulate, and the liquid returns to the liquid storage tank 22 through the drain valve 20. The experimental pipe section 17 is connected with a pipeline loop in a flange connection mode; the blower 8 of the air circulation loop is kept balanced in internal and external pressure by the autoclave and is supplied with heat by an electric heating system 9 in the autoclave wall; a rotating shaft of the fan 8 is connected with a magnetic driving device 12 positioned in the kettle cover, the power of the magnetic driving device 12 is derived from a direct connection motor 10, and a pressure sensor C21, a temperature sensor 13 and a gas flowmeter 16 are arranged in front of an experimental pipe section 17; a booster pump 3 is additionally arranged at the air inlet of the high-pressure kettle; a check valve A5 and a stop valve B6 are arranged between the booster pump 3 and the kettle; the experimental gas source is provided by a gas cylinder 1 externally connected with a booster pump 3.
The invention provides a high-pressure high-flow-rate circulation two-phase flow erosion experimental method, which comprises the following concrete steps: the liquid used for the experiment is loaded from the loading reservoir 22, the sample is loaded into the sample tank in the experimental tube section 17, and the experimental tube section 17 is loaded into the gas circuit and sealed. Opening a stop valve A2, a stop valve B6 and a booster pump 3, boosting the pressure in the pipeline system to 1MPa, then closing a stop valve B6 and the booster pump 3, opening an exhaust valve 28, repeating for 3 times to completely replace the gas in the system by the experimental gas, closing the exhaust valve 28, opening a stop valve B6, opening the booster pump 3, introducing the required gas into the autoclave and the pipeline, and closing a stop valve B6 after the required pressure is reached; setting the temperature of the electric heating system 9, starting the motor 10, controlling the flow rate of gas in the pipeline through the speed of the motor, opening the drain valve 20 and the stop valve C23, opening the plunger pump 24 to enable liquid to enter a loop, and starting a two-phase flow erosion experiment. After the experiment is finished, the power supply of the motor 10 and the power supply of the electric heating system 9 are firstly closed, the exhaust valve 28 is opened, the experiment section 17 is taken out after the system is decompressed, and the sample is taken out. And treating and cleaning the corrosive medium in the circulating loop.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A high pressure high flow rate circulation two-phase flow erosion rate experimental device is characterized in that: comprises a gas cylinder (1), a booster pump (3), a kettle body (7), a fan (8), an experiment pipe section (17), a motor (10), a magnetic drive device (12), a temperature sensor (13), a pressure sensor A (4), a pressure sensor C (21), a pressure sensor B (25), a gas flowmeter (16), a gas-liquid separator (19), a drain valve (20), a liquid storage tank (22), a plunger pump (24), a high-pressure nozzle (14), a safety valve A (11), a safety valve B (27) and an exhaust valve (28), wherein the fan (8) is arranged in the kettle body (7), an electric heating system (9) is arranged at the lower part of the kettle body (7), the safety valve A (11) is arranged on an exhaust pipe of the kettle body (7), an air inlet pipe and an air outlet pipe of the fan (8) are connected with the experiment pipe section (17) to form a circulating pipeline loop, and liquid in the liquid storage tank (22) enters the experiment pipe section (, set up stop valve C (23) between liquid storage pot (22) and plunger pump (24), set up pressure sensor B (25) and check valve B (26) between plunger pump (24) and high pressure nozzle (14), set up reducing joint A (15) between high pressure nozzle (14) and experiment pipe section (17), set up reducing joint B (18) between experiment pipe section (17) and vapour and liquid separator (19), gas-liquid two-phase flow passes through vapour and liquid separator (19) behind experiment pipe section (17), gaseous circulation after returning fan (8) pressure boost, liquid returns liquid storage pot (22) through trap (20), experiment pipe section (17) insert pipeline return circuit through the flange, fan (8) axis of rotation links to each other with magnetic drive device (12), motor (10) provide power for magnetic drive device (12), experiment pipe section (17) are preceding to set up pressure sensor C (21), Temperature sensor (13) and gas flowmeter (16), cauldron body (7) air inlet sets up booster pump (3), set up pressure sensor A (4) between booster pump (3) and the cauldron body (7), check valve A (5) and stop valve B (6), gas cylinder (1) is for connecting booster pump (3), set up stop valve A (2) between gas cylinder (1) and booster pump (3), the pipeline between fan (8) and high pressure nozzle (14) is opened there is the branch road, set up relief valve B (27) and discharge valve (28) on the branch road.
2. The high pressure high flow rate circulation two-phase flow erosion rate experimental device according to claim 1, characterized in that: the fan (8) is connected with the gas circulation loop through the gas inlet and outlet holes on the kettle cover of the kettle body (7), and the air inlet of the fan (8) is directly connected with the inside of the kettle body (7) so as to keep the pressure in the pipe and the pressure in the kettle body (7) balanced.
3. The high pressure high flow rate circulation two-phase flow erosion rate experimental device according to claim 1, characterized in that: the experiment pipe section (17) is internally provided with a sample groove for mounting a sample, the sample is designed to be attached to the sample groove, and the two sections are sealed by a sealing gasket after being filled into the sample groove.
4. The high pressure high flow rate circulation two-phase flow erosion rate experimental device according to claim 1, characterized in that: the air inlet pipe and the air outlet pipe of the fan (8) are 50mm in inner diameter, the experiment pipe section (17) is 25mm in inner diameter, and the air inlet pipe and the air outlet pipe of the fan (8) are connected with the experiment pipe section through reducing interfaces.
5. The high pressure high flow rate circulation two-phase flow erosion rate experimental device according to claim 1, characterized in that: the whole device is made of 316L stainless steel materials, the pressure range of the device is 0.1-30 MPa, and the temperature range of fluid in the device is 0-120 ℃.
6. The high pressure high flow rate circulation two-phase flow erosion rate experimental device according to claim 1, characterized in that: the gas medium component provided by the gas cylinder (1) comprises CO2、N2。
7. The high pressure high flow rate circulation two-phase flow erosion rate experimental device according to claim 3, characterized in that: the sample is a metal.
8. The high pressure high flow rate circulation two-phase flow erosion rate experimental device according to claim 1, characterized in that: the motor (10) is in stepless speed regulation.
9. The method for applying the experimental device for the erosion rate of the high-pressure high-flow-rate circulating two-phase flow, which is disclosed by claim 1, is characterized in that: the method comprises the following steps:
s1: liquid used for the experiment is filled into a liquid storage tank (22), a sample is filled into a sample groove in the test pipe section (17), and the test pipe section (17) is filled into a gas loop and sealed;
s2: opening a stop valve A (2), a stop valve B (6) and a booster pump (3), boosting the pressure in the pipeline system to 1MPa, closing the stop valve B (6) and the booster pump (3), opening an exhaust valve (28), repeating for 3 times, finishing the replacement of gas in the system by experimental gas, and closing the exhaust valve (28);
s3: opening a stop valve B (6) and a booster pump (3), introducing required gas into the kettle body (7) and the pipeline, and closing the stop valve B (6) after the required pressure is reached;
s4: setting the temperature of an electric heating system (9), starting a motor (10), controlling the flow rate of gas in a pipeline through the speed of the motor (10), opening a drain valve (20) and a stop valve C (23), opening a plunger pump (24), enabling liquid to enter a loop, and starting a two-phase flow erosion experiment;
s5: after the experiment is finished, firstly, the power supply of the motor (10) and the electric heating system (9) are closed, the exhaust valve (28) is opened, the experiment pipe section (17) is taken out after the system is decompressed, and the sample is taken out;
s6: and (4) treating and cleaning the corrosive medium in the circulation loop.
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| CN111562188B (en) | 2023-03-28 |
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