Experimental system and experimental method for monitoring phase change of gas to be detected

Abstract

The invention belongs to the technical field of gas phase state monitoring, and relates to an experimental system and an experimental method for monitoring phase state change of to-be-detected gas, the experimental system comprises: a reaction kettle which is provided with an inner cavity for accommodating the to-be-detected gas and is provided with an observation window for observing the inside of the reaction kettle; the monitoring assembly is arranged towards the observation window and is used for monitoring a phase state change image in the reaction kettle in real time; the temperature adjusting mechanism is mounted on the reaction kettle and is used for adjusting the temperature of the inner cavity; the pressure adjusting mechanism is connected with the reaction kettle and is used for adjusting the air pressure of the inner cavity; the gas conveying assembly is communicated with the reaction kettle and is used for conveying to-be-detected gas to the inner cavity; the processing module is in communication connection with the pressure adjusting mechanism, the temperature adjusting mechanism and the monitoring assembly, and the processing module is used for obtaining the phase state change trend of the to-be-detected gas according to the phase state change image, the temperature and the air pressure. By adopting the experimental system, the phase state change condition in the reaction kettle can be accurately monitored, and the phase state change trend can be obtained.

Description

Technical Field

[0001] The invention belongs to the technical field of gas phase monitoring, and in particular relates to an experimental system and an experimental method for monitoring the phase change of a gas to be measured. Background Art

[0002] With the continuous progress of human society, the continuous exploitation of oil resources around the world, the exploitation and reserves of conventional oil and gas reservoirs can no longer meet the world's demand for the development of oil and gas resources. At the same time, the exploitation technology of oil and gas resources is constantly improving. The study of fluid phase characteristics is crucial for analyzing the phase changes of formation fluids, basic gas injection development mechanisms, and production dynamic adjustments, especially in oil and gas field development and reservoir numerical simulation. In reservoir numerical simulation, PVT fitting must be performed to obtain the thermodynamic parameters of the PVT phase characteristics of formation fluids, and thus obtain the fluid PVT data required by the component simulator. As a basic phase experiment, PVT experiments provide an important basis for reservoir engineering and production applications. For volatile oil reservoirs, condensate gas reservoirs, and some unconventional light oil and gas reservoirs, due to the high content of intermediate components, their phase changes are more complex, so it is particularly important to study the phase characteristics of fluids such as the gas to be tested. Verifying the accuracy of PVT experimental data is crucial for the development and research of oil and gas resources. The laws of fluid properties and phase changes under high temperature and high pressure are complex. Therefore, it is crucial to carry out PVT phase experiments on the gas to be tested and other gases under high temperature and high pressure conditions and multi-component fluid phase equilibrium experiments.

[0003] There are some gas-liquid mixture phase state experimental devices in the prior art, but it is impossible to observe the phase state changes inside the reactor in real time, resulting in large errors in data monitoring results and inaccurate experimental results. Summary of the invention

[0004] The purpose of the present invention is to provide an experimental system and an experimental method for monitoring the phase change of a gas to be measured, so as to solve the technical problem of inaccurate monitoring of the phase change of a gas to be measured existing in the prior art.

[0005] In order to achieve the above object, the present invention provides an experimental system for monitoring the phase change of a gas to be measured, the experimental system comprising:

[0006] The reactor is provided with an inner cavity for containing the gas to be tested, and the reactor is provided with an observation window for observing the interior of the reactor;

[0007] A monitoring component is arranged toward the observation window and is used to monitor the phase change image inside the reactor in real time;

[0008] A temperature adjustment mechanism, installed on the reactor and used to adjust the temperature of the inner cavity;

[0009] A pressure adjustment mechanism, connected to the reaction kettle and used to adjust the gas pressure in the inner cavity;

[0010] A gas delivery component, connected to the reaction vessel and used for delivering the gas to be tested to the inner cavity;

[0011] The processing module is in communication connection with the pressure adjustment mechanism, the temperature adjustment mechanism and the monitoring component, and is used to obtain the phase change trend of the gas to be measured according to the phase change image, temperature and air pressure.

[0012] In some embodiments, the reactor includes a reactor body, a through hole is opened at the bottom of the reactor body, and an observation window is opened at the top of the reactor body. The pressure adjustment mechanism includes: a driving piston, the driving piston passes through the through hole and extends into the inner cavity; a linear driving assembly, which is driven and connected to the driving piston.

[0013] In some embodiments, the monitoring component includes: a camera for collecting phase change images, a transparent glass is provided on the observation window cover, the middle of the camera, the transparent glass and the midline of the inner cavity coincide with each other; a communication unit is communicatively connected to the camera and the processing module, and the communication unit is used to transmit the phase change image to the processing module.

[0014] In some embodiments, a cover plate is further provided on the transparent glass, the cover plate has a hollow cavity, and the camera faces the hollow cavity.

[0015] In some embodiments, the temperature adjustment mechanism includes: a heat-conducting sleeve assembly, including a heating sleeve and a cooling sleeve, the heating sleeve and the cooling sleeve are alternately arranged in sequence along the height direction on the periphery of the reactor; a cooling assembly, connected to the cooling sleeve, and the cooling assembly is used to circulate a low-temperature medium into the cooling sleeve; a heating assembly, connected to the heating sleeve, and the heating assembly is used to circulate a high-temperature medium into the heating sleeve.

[0016] In some embodiments, the cooling component and the heating component both include: a medium container for accommodating a low-temperature medium or a high-temperature medium; a driving member, the inlet of the driving member is connected to the medium container and is used to drive the low-temperature medium or the high-temperature medium to flow; a heat exchanger, connected to the outlet of the driving member and used to cool the low-temperature medium or heat the high-temperature medium; a reversing valve, the first oil port on the first side of the reversing valve is connected to the outlet of the heat exchanger, the second oil port on the first side of the reversing valve is connected to the medium container, and the first oil port on the second side and the second oil port on the second side of the reversing valve are both connected to the heating sleeve or the cooling sleeve.

[0017] In some embodiments, the gas delivery component includes: a first gas storage tank, the gas outlet of the first gas storage tank is connected to the gas inlet of the inner cavity through a pipeline, and the first gas storage tank is used to store the first gas; a pressure regulating valve, installed on the pipeline between the first gas storage tank and the inner cavity and used to adjust the gas pressure at the gas inlet of the inner cavity.

[0018] In some embodiments, the gas delivery assembly further includes: a second gas storage tank, wherein a gas outlet of the second gas storage tank is connected to the pressure regulating valve and is used to store the second gas.

[0019] In some embodiments, the gas delivery assembly further includes: a switch valve installed between the first gas storage tank and the inner cavity and used to open and close the gas path connection between the first gas storage tank and the inner cavity.

[0020] The second aspect of the present invention provides an experimental method for monitoring the phase change of the gas to be tested. The experimental method is applied to the above-mentioned experimental system, and the experimental method includes the following steps: obtaining simulation parameters and gas content parameters of the gas to be tested; selecting corresponding gas to be introduced into the reactor according to the gas content parameters; adjusting the temperature of the reactor to a preset temperature through a temperature adjustment mechanism; adjusting the gas pressure of the reactor within a pressure range corresponding to the simulation parameters through a pressure adjustment mechanism; observing and recording the phase change of the gas to be tested in the reactor to obtain the phase change trend of the gas to be tested at a preset temperature and different pressures; adjusting the pressure of the reactor to a preset pressure through a pressure adjustment mechanism; adjusting the temperature of the reactor within a temperature range corresponding to the simulation parameters through a temperature adjustment mechanism; observing and recording the phase change of the gas to be tested in the reactor to obtain the phase change trend of the gas to be tested at a preset pressure and different temperatures.

[0021] In the above technical scheme, the experimental system for monitoring the phase change of the gas to be tested includes a reactor, a monitoring component, a temperature adjustment mechanism, a pressure adjustment mechanism, a gas delivery component and a processing module. The gas to be tested can undergo a phase change in the reactor, and the gas delivery component can deliver the gas to be tested to the reactor. The reactor of the present application is provided with an observation window for observing the inside of the reactor. The monitoring component is arranged toward the observation window and can monitor the phase change image inside the reactor in real time. The temperature adjustment mechanism and the pressure adjustment mechanism can adjust the temperature and pressure in the reactor respectively. By adjusting the temperature and pressure in the reactor, the phase change image of the gas to be tested can be obtained. After the processing module obtains multiple sets of phase change images at different temperatures and pressures, the phase change trend of the gas to be tested can be obtained.

[0022] Other features and advantages of the embodiments of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative work. In the accompanying drawings:

[0024] Figure 1 A schematic diagram of the structure of an experimental system for monitoring the phase change of a gas to be measured provided according to an embodiment of the present invention;

[0025] Figure 2 The present invention is a flowchart of an experimental method for monitoring the phase change of a gas to be measured according to an embodiment of the present invention.

[0026] Description of Reference Numerals

[0027] 1 Reactor

[0028] 11 Observation Window

[0029] 12. Transparent Glass

[0030] 13 Cover

[0031] 21 Camera

[0032] 32 Thermal sleeve assembly

[0033] 33 Media Container

[0034] 34 Drive element

[0035] 35 Heat Exchanger

[0036] 36 Directional valve

[0037] 37 Refrigeration compressor

[0038] 41 Drive piston

[0039] 42 Rotating drive element

[0040] 43 torque converter

[0041] 51 First Gas Tank

[0042] 52 Pressure regulating valve

[0043] 53 Second gas tank

[0044] 54 Switch valve

[0045] 55 Check valve

[0046] 56 Air pressure sensor

[0047] 57 Pressure transmitter

[0048] 58 Safety valve

[0049] 59 Vent valve

[0050] 6 Processing Module DETAILED DESCRIPTION

[0051] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0052] An experimental system and an experimental method for monitoring the phase change of a gas to be measured according to the present invention are described below with reference to the accompanying drawings.

[0053] like Figure 1 FIG. 1 is a schematic diagram of the structure of an experimental system for monitoring the phase change of a gas to be measured according to an embodiment of the present invention. The experimental system includes:

[0054] The reactor 1 is provided with an inner cavity for containing the gas to be tested, and the reactor 1 is provided with an observation window 11 for observing the interior of the reactor 1;

[0055] A monitoring component, disposed toward the observation window 11 and used to monitor the phase change image inside the reactor 1 in real time;

[0056] A temperature adjustment mechanism, installed on the reactor 1 and used to adjust the temperature of the inner cavity;

[0057] A pressure adjustment mechanism, connected to the reactor 1 and used to adjust the gas pressure in the inner cavity;

[0058] A gas delivery component, connected to the reaction vessel 1 and used to deliver the gas to be tested to the inner cavity;

[0059] The processing module 6 is in communication connection with the pressure adjustment mechanism, the temperature adjustment mechanism and the monitoring component. The processing module 6 is used to obtain the phase change trend of the gas to be measured according to the phase change image, temperature and air pressure.

[0060] The reactor 1 can accommodate the gas to be tested, the temperature adjustment mechanism can adjust the temperature inside the reactor 1, the pressure adjustment mechanism can adjust the pressure inside the reactor 1, the gas delivery component can input the gas to be tested into the reactor 1, the detection component can monitor the image inside the reactor 1 in real time through the observation window 11, and send the monitored image to the processing module 6, and the processing module 6 can obtain the phase change trend of the gas to be tested based on multiple image analysis.

[0061] When it is necessary to conduct a gas phase change trend experiment, the gas to be tested is first delivered to the reactor 1 through the gas delivery component, and then the temperature and pressure of the reactor 1 are adjusted so that the temperature and pressure in the reactor 1 reach the initial temperature and initial pressure of the experiment. When it is necessary to monitor the change trend of the gas to be tested under different pressures, the temperature adjustment mechanism is controlled to keep the temperature in the reactor 1 constant, and the pressure in the reactor 1 is adjusted by the pressure adjustment mechanism, so that the monitoring component can monitor and obtain multiple first phase change images, and the processing module 6 obtains the phase change trend of the gas to be tested at the initial temperature and different pressures according to the multiple first phase change images. When it is necessary to monitor the change trend of the gas to be tested under different temperatures, the pressure adjustment mechanism is controlled to keep the pressure in the reactor 1 constant, and the temperature in the reactor 1 is adjusted by the temperature adjustment mechanism, so that the monitoring component can monitor and obtain multiple second phase change images, and the processing module 6 can obtain the phase change trend of the gas to be tested at the initial pressure and different temperatures according to the multiple second phase change images.

[0062] By using the above-mentioned experimental system, the pressure and temperature in the reactor 1 can be accurately adjusted, and the phase change image of the gas to be tested after the temperature or pressure is adjusted can be monitored in real time, so that the processing module 6 can analyze and obtain the phase change trend of the gas to be tested.

[0063] In one embodiment, Figure 1 As shown, the reactor 1 includes a reactor body, a through hole is provided at the bottom of the reactor body, an observation window 11 is provided at the top of the reactor body, and the pressure adjustment mechanism includes: a driving piston 41, the driving piston 41 passes through the through hole and extends into the inner cavity; a linear driving component, which is connected to the driving piston 41. The pressure adjustment mechanism provided in the embodiment of the present invention includes a driving piston 41 and a linear driving component, and the linear driving component can apply a driving force to the driving piston 41, so that the driving piston 41 expands or reduces the volume of the inner cavity of the reactor 1 to adjust the pressure of the gas in the reactor 1. By adopting the above-mentioned pressure adjustment mechanism, the pressure in the reactor 1 can be adjusted more directly, and the adjustment is convenient and the control is precise.

[0064] In a specific embodiment, the linear drive assembly includes a rotary drive member 42 and a torque conversion member 43. The rotary drive member 42 can transmit the rotary drive force to the torque conversion member 43. The torque conversion member 43 can convert the rotary torque into a linear torque and transmit it to the drive piston 41 to drive the drive piston 41. The use of the above-mentioned pressure adjustment mechanism can make the maximum pressure in the reactor 1 reach 150Mpa, and the gas to be tested can be monitored within a larger pressure range.

[0065] In one embodiment, the reactor 1 is also equipped with a temperature sensor for detecting the inner cavity temperature of the reactor 1 and a pressure sensor for detecting the inner cavity pressure of the reactor 1. By setting the temperature sensor and the pressure sensor, the temperature and pressure of the inner cavity of the reactor 1 can be adjusted more accurately.

[0066] In one embodiment, Figure 1 As shown, the monitoring component includes: a camera 21 for collecting phase change images, a perspective glass 12 is provided on the observation window 11, and the middle part of the camera 21, the perspective glass 12 and the center line of the inner cavity coincide with each other; a communication unit (not shown in the figure), which is connected to the camera 21 and the processing module 6, and the communication unit is used to transmit the phase change image to the processing module 6. The monitoring component provided by the embodiment of the present invention includes a camera 21 and a communication unit, and the camera 21 faces the observation window 11 and can collect the phase change image in the reactor 1. Specifically, a perspective glass 12 is provided on the observation window 11, so that the camera 21 can collect the phase change image in the inner cavity through the perspective. In order to enable the camera 21 to better collect the phase change image in the inner cavity, the embodiment of the present invention makes the middle part of the camera 21, the perspective glass 12 and the center line of the inner cavity coincide with each other. After the camera 21 collects the phase change image in the inner cavity, the monitoring component can transmit the phase change image to the communication unit, and the communication unit further transmits the phase change image to the processing module 6. The monitoring component described above has excellent monitoring effect and simple control logic and is easy to implement.

[0067] In one embodiment, Figure 1 As shown, a cover plate 13 is also provided on the perspective glass 12, and a hollow cavity is formed in the cover plate 13, and the camera 21 faces the hollow cavity. The cover plate 13 can support the perspective glass 12 and protect the perspective glass 12 under the cover plate 13, so as to prevent the perspective glass 12 from being scratched by foreign impurities and affect the image acquisition of the inner cavity of the reactor 1 by the camera 21. A hollow cavity is provided above the cover plate 13, so that the camera 21 can focus on the perspective glass 12 and center the image, so as to facilitate the processing module 6 to perform statistics and analysis on the image.

[0068] In one embodiment, Figure 1As shown, the temperature adjustment mechanism includes: a heat-conducting sleeve assembly 32, including a heating sleeve and a cooling sleeve, the heating sleeve and the cooling sleeve are alternately arranged on the periphery of the reactor 1 in the height direction; a cooling assembly, which is connected to the cooling sleeve, and the cooling assembly is used to circulate a low-temperature medium into the cooling sleeve; a heating assembly, which is connected to the heating sleeve, and the heating assembly is used to circulate a high-temperature medium into the heating sleeve. The heat-conducting sleeve assembly 32 includes a heating sleeve and a cooling sleeve, the heating sleeve can accommodate a high-temperature medium, and the cooling sleeve can accommodate a low-temperature medium. When it is necessary to heat the reactor 1, the heating assembly can be controlled to transport a high-temperature medium into the heating sleeve, and the high-temperature medium is transmitted to the inner cavity of the reactor 1 through heat conduction to increase the temperature of the inner cavity. When it is necessary to cool the reactor 1, the cooling assembly can be controlled to transport a low-temperature medium into the cooling sleeve, and the low-temperature medium absorbs the heat transmitted by the reactor 1 to reduce the temperature of the reactor 1. In a specific embodiment, the high-temperature medium is heat transfer oil, the low-temperature medium is antifreeze, the heating component can heat the heat transfer oil to a maximum value of 180°C, and the cooling component can cool the antifreeze to -40°C, so that the heating sleeve and the cooling sleeve can heat or cool the inner cavity of the reactor 1. The heating sleeve and the cooling sleeve are alternately arranged on the periphery of the reactor 1 in the height direction, which can uniformly heat or cool the inner cavity of the reactor 1, and prevent the irreversible deformation of the reactor 1 caused by local overheating and local overcooling.

[0069] In one embodiment, Figure 1As shown, the cooling component and the heating component both include: a medium container 33, a heat exchanger 35, a driving member 34 and a reversing valve 36; the medium container 33 is used to contain low-temperature medium or high-temperature medium; the inlet of the driving member 34 is connected to the medium container 33 and is used to drive the low-temperature medium or high-temperature medium to flow; the heat exchanger 35 is connected to the outlet of the driving member 34 and is used to cool the low-temperature medium or heat the high-temperature medium; the first oil port on the first side of the reversing valve 36 is connected to the outlet of the heat exchanger 35, the second oil port on the first side of the reversing valve 36 is connected to the medium container 33, and the first oil port on the second side and the second oil port on the second side of the reversing valve 36 are both connected to the heating sleeve or the cooling sleeve. The medium container 33 can contain low-temperature medium or high-temperature medium, the driving member 34 can transfer the low-temperature medium or high-temperature medium to the heat exchanger 35, and the heat exchanger 35 will cool the low-temperature medium or heat the high-temperature medium, so that the low-temperature medium or high-temperature medium after heat exchange is transferred to the reversing valve 36. Preferably, the driving member 34 can be a hydraulic pump, which can drive the low-temperature medium or the high-temperature medium to flow in the pipeline. The reversing valve 36 can control the heat exchanger 35 to be connected or cut off with the heating sleeve or the cooling sleeve, so as to cool or heat the inner cavity of the reactor 1. When the first oil port on the first side of the reversing valve 36 is connected with the first oil port on the second side of the reversing valve 36, the high-temperature medium or the low-temperature medium can be transmitted from the heat exchanger 35 to the heating sleeve or the cooling sleeve. The above-mentioned cooling component and heating component can make the high-temperature medium or the low-temperature medium be more stably transmitted to the heating sleeve or the cooling sleeve, with a simple structure and stable medium transmission. In a specific embodiment, the cooling component also includes a refrigeration compressor 37, which can reduce the temperature in the heat exchanger 35 so that the low-temperature medium passing through the heat exchanger 35 can reduce the temperature.

[0070] In one embodiment, Figure 1As shown, the gas delivery assembly includes: a first gas storage tank 51, the gas outlet of the first gas storage tank 51 is connected to the gas inlet of the inner cavity through a pipeline, and the first gas storage tank 51 is used to store the first gas; a pressure regulating valve 52, which is installed on the pipeline between the first gas storage tank 51 and the inner cavity and is used to adjust the gas pressure at the gas inlet of the inner cavity. The gas storage tank is a container for storing high-pressure gas. The first gas storage tank 51 in the embodiment of the present invention can store compressed first gas. The pressure regulating valve 52 is a gas valve that can adjust the gas pressure. When the pressure at the detection port of the pressure regulating valve 52 is greater than the preset pressure value, the pressure regulating valve 52 can connect the detection port with the outside atmosphere to make the pressure at the detection port lower than the preset pressure value. The gas delivery assembly provided in the embodiment of the present invention includes a first gas storage tank 51 and a pressure regulating valve 52. The gas in the first gas storage tank 51 can be transmitted to the inner cavity of the reactor 1 through a pipeline. The pressure regulating valve 52 is connected to the pipeline. The detection port of the pressure regulating valve 52 can detect the gas pressure in the inner cavity of the reactor 1. When the pressure is greater than the preset pressure value, the pressure regulating valve 52 opens and reduces the pressure at the air inlet of the inner cavity of the reactor 1. By adopting the above-mentioned gas delivery assembly, the first gas in the first gas storage tank 51 can be safely transmitted to the inner cavity of the reactor 1, so as to perform a phase change experiment on the gas to be tested. In one embodiment, the first gas is the gas to be tested.

[0071] In one embodiment, Figure 1 As shown, the gas delivery assembly also includes: a second gas storage tank 53, the gas outlet of the second gas storage tank 53 is connected to the pressure regulating valve 52 and is used to store the second gas. Both the first gas and the second gas can be transmitted to the inner cavity of the reactor 1 through a pipeline, and gas fusion can be achieved in the pipeline and the inner cavity of the reactor 1. In a specific embodiment, the first gas and the second gas are mixed in a preset ratio to obtain a gas to be tested. The above-mentioned second gas storage tank 53 can be used to perform a phase change experiment on the mixed gas, which expands the scope of use of the experimental system, so that the experimental system provided by the embodiment of the present invention can perform a phase change experiment on the mixed gas. In a specific embodiment, the first gas is carbon dioxide, and the second gas is methane. The mixture of carbon dioxide and methane can simulate the gas environment deep underground, so that the gas parameters of the simulation experiment are closer to the gas environment parameters underground.

[0072] In one embodiment, the gas delivery assembly further includes: a switch valve 54, which is installed between the first gas tank 51 and the inner cavity and is used to open and close the gas path between the first gas tank 51 and the inner cavity. In order to prevent the first gas tank 51 from continuously delivering gas to the inner cavity of the reactor 1, a switch valve 54 is connected between the first gas tank 51 and the inner cavity of the reactor 1, and the switch valve 54 can open and close the gas path between the first gas tank 51 and the inner cavity of the reactor 1. In a specific embodiment, the switch valve 54 is installed on the pipeline between the pressure regulating valve 52 and the air inlet of the inner cavity of the reactor 1. When the switch valve 54 is closed, neither the first gas tank 51 nor the second gas tank 53 can deliver gas to the inner cavity of the reactor 1.

[0073] In one embodiment, a one-way valve 55 is further provided between the pipelines of the pressure regulating valve 52 and the switch valve 54 , and the one-way valve 55 can control the one-way flow of gas from the first gas storage tank 51 or the second gas storage tank 53 into the inner cavity of the reactor 1 .

[0074] In one embodiment, an air pressure sensor 56 is further provided between the one-way valve 55 and the switch valve 54 , and can be used to detect the pressure of the air inlet of the inner cavity of the reactor 1 .

[0075] In one embodiment, the air inlet of the reactor 1 is also connected to a pressure transmitter 57 for adjusting the input pressure of the air inlet.

[0076] In one embodiment, the first gas tank 51 and the second gas tank 53 are both connected with a safety valve 58 to prevent excessive pressure in the first gas tank 51 and / or the second gas tank 53, which may cause pressure damage to the pipeline between the first gas tank 51 and the inner cavity of the reactor 1.

[0077] In one embodiment, the gas outlets of the first gas storage tank 51 and the second gas storage tank 53 are both connected to the vent valve 59 through a pipeline, and the other end of the vent valve 59 is connected to the atmosphere for venting the gas in the first gas storage tank 51 and / or the second gas storage tank 53.

[0078] The above-mentioned experimental system for monitoring the phase change of the gas to be tested can be used to pass the gas to be tested into the reactor 1, and adjust the pressure and temperature of the reactor 1. The reactor 1 is provided with an observation window 11, and the observation window 11 is provided with a camera 21, so that the experimenter can observe the phase change in the reactor 1 in real time. The processing module 6 can also obtain the phase change image, and determine the phase change trend according to a plurality of phase change images, so as to realize the visual observation of the phase change of the gas to be tested. In addition, the camera 21 is a real-time monitoring, and can obtain more accurate experimental data in combination with the current temperature and pressure of the reactor 1. In addition, the experimental device of the present invention has a wide temperature and pressure adjustment range, high adjustment safety, and can perform phase change experiments on mixed gases.

[0079] In one embodiment, an experimental method for monitoring the phase change of a gas to be measured is provided, such as Figure 2 FIG. 1 is a flow chart of an experimental method for monitoring the phase change of a gas to be measured according to an embodiment of the present invention. The experimental method is applied to the above-mentioned experimental system, and the experimental method includes the following steps:

[0080] S101, obtaining simulation parameters and gas content parameters of the gas to be tested;

[0081] S102, selecting corresponding gas according to gas content parameters and introducing it into the reactor 1;

[0082] S103, adjusting the temperature of the reactor 1 to a preset temperature through a temperature adjustment mechanism;

[0083] S104, adjusting the gas pressure of the reactor 1 within the pressure range corresponding to the simulation parameter through the pressure adjustment mechanism;

[0084] S105, observing and recording the phase change of the gas to be tested in the reactor 1 to obtain the phase change trend of the gas to be tested at a preset temperature and different pressures;

[0085] S106, adjusting the pressure of the reactor 1 to a preset pressure through a pressure adjustment mechanism;

[0086] S107, adjusting the temperature of the reactor 1 within the temperature range corresponding to the simulation parameter by means of the temperature adjustment mechanism;

[0087] S108, observing and recording the phase change of the gas to be tested in the reactor 1, so as to obtain the phase change trend of the gas to be tested at a preset pressure and different temperatures.

[0088] First, the processing module 6 of the experimental system can obtain the simulation parameters and gas content parameters of the gas to be tested, and then pass the corresponding gas into the reactor 1 according to the gas content parameters. For example, the ratio of the first gas to the second gas corresponding to the gas content parameter is 2:1, and the processing module 6 controls the first gas storage tank 51 to output two units of the first gas, and controls the second gas storage tank 53 to output one unit of the second gas, so as to obtain the gas to be tested. The control module can adjust the temperature in the reactor 1 to reach the preset temperature, and then control the pressure adjustment mechanism to adjust the pressure in the reactor 1 within the pressure range corresponding to the simulation parameters. The processing module 6 controls the monitoring component to observe the inner cavity of the reactor 1 to obtain multiple phase change images, and the processing module 6 records and analyzes the multiple phase change images to obtain the phase change trend of the gas to be tested at the preset temperature and different pressures. Using the above method, the pressure rise or fall curve of the gas in the reactor 1 at a fixed temperature can be accurately recorded, and the phase change in the reactor 1 can be observed. When conducting a phase change experiment of the gas to be tested at different temperatures, the processing module 6 controls the pressure adjustment mechanism to set the inner cavity pressure of the reactor 1 to a preset pressure, and controls the temperature adjustment mechanism to adjust the inner cavity temperature of the reactor 1 within the temperature range corresponding to the simulation parameters. The processing module 6 controls the monitoring component to monitor and obtain multiple phase change images in the reactor 1, and the processing module 6 records and analyzes the multiple phase change images to obtain the phase change trend of the gas to be tested at the preset pressure and different temperatures. By using the above method, the temperature rise or fall curve of the gas in the reactor 1 under a fixed pressure can be accurately recorded, and the phase change situation in the reactor 1 can be observed.

[0089] In one embodiment, the pressure adjustment mechanism can control the speed at which the pressure in the reactor 1 increases or decreases, thereby more accurately obtaining the phase state image at various pressures in the reactor 1 .

[0090] In one embodiment, the temperature adjustment mechanism can control the speed of temperature rise or fall in the reactor 1 , so as to more accurately obtain the phase state image at various temperatures in the reactor 1 .

[0091] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0092] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0094] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An experimental system for monitoring the phase change of a gas to be tested, characterized in that: The experimental system includes: The reactor (1) is provided with an inner cavity for accommodating the gas to be tested, and the reactor (1) is provided with an observation window (11) for observing the interior of the reactor (1); A monitoring component, arranged toward the observation window (11) and used to monitor the phase change image inside the reactor (1) in real time; A temperature adjustment mechanism, installed on the reaction kettle (1) and used to adjust the temperature of the inner cavity; A pressure adjustment mechanism, connected to the reaction kettle (1) and used to adjust the air pressure in the inner cavity; A gas delivery component, connected to the reaction vessel (1) and used for delivering the gas to be tested to the inner cavity; A processing module (6) is communicatively connected to the pressure adjustment mechanism, the temperature adjustment mechanism and the monitoring component, and the processing module (6) is used to obtain the phase change trend of the gas to be measured based on the phase change image, the temperature and the air pressure.

2. The experimental system for monitoring the phase change of a gas to be tested according to claim 1, characterized in that: The reactor (1) comprises a reactor body, a through opening is provided at the bottom of the reactor body, the observation window (11) is provided at the top of the reactor body, and the pressure adjustment mechanism comprises: A driving piston (41), the driving piston (41) passes through the through-hole and extends into the inner cavity; A linear drive assembly is drivingly connected to the drive piston (41).

3. The experimental system for monitoring the phase change of a gas to be tested according to claim 1, characterized in that: The monitoring components include: A camera (21) is used to collect the phase change image, the observation window (11) is covered with a transparent glass (12), and the middle of the camera (21), the transparent glass (12) and the midline of the inner cavity coincide with each other; A communication unit is communicatively connected to both the camera (21) and the processing module (6), and the communication unit is used to transmit the phase change image to the processing module (6).

4. The experimental system for monitoring the phase change of the gas to be tested according to claim 3, characterized in that: A cover plate (13) is also provided on the transparent glass (12), the cover plate (13) is provided with a hollow cavity, and the camera (21) faces the hollow cavity.

5. The experimental system for monitoring the phase change of a gas to be tested according to claim 1, characterized in that: The temperature adjustment mechanism comprises: A heat-conducting sleeve assembly (32), comprising a heating sleeve and a cooling sleeve, wherein the heating sleeve and the cooling sleeve are alternately arranged in sequence on the periphery of the reaction kettle (1) along a height direction; A cooling component is connected to the cooling sleeve, and the cooling component is used to circulate and transport a low-temperature medium into the cooling sleeve; A heating component is communicated with the heating sleeve, and the heating component is used for circulating a high-temperature medium into the heating sleeve.

6. The experimental system for monitoring the phase change of the gas to be tested according to claim 5, characterized in that: The cooling component and the heating component both include: A medium container (33), used for containing the low-temperature medium or the high-temperature medium; A driving member (34), the inlet of which is in communication with the medium container (33) and is used to drive the low-temperature medium or the high-temperature medium to flow; a heat exchanger (35), which is in communication with the outlet of the driving member (34) and is used to cool the low-temperature medium or heat the high-temperature medium; A reversing valve (36), wherein a first oil port on a first side of the reversing valve (36) is in communication with an outlet of the heat exchanger (35), a second oil port on a first side of the reversing valve (36) is in communication with the medium container (33), and a first oil port on a second side and a second oil port on a second side of the reversing valve (36) are both in communication with the heating sleeve or the cooling sleeve.

7. An experimental system for monitoring the phase change of a gas to be measured according to any one of claims 1 to 6, characterized in that: The gas delivery assembly comprises: a first gas storage tank (51), wherein a gas outlet of the first gas storage tank (51) is connected to a gas inlet of the inner cavity via a pipeline, and the first gas storage tank (51) is used to store a first gas; A pressure regulating valve (52) is installed on the pipeline between the first gas storage tank (51) and the inner cavity and is used to adjust the air pressure at the air inlet of the inner cavity.

8. The experimental system for monitoring the phase change of a gas to be tested according to claim 7, characterized in that: The gas delivery assembly also includes: A second gas storage tank (53), wherein the gas outlet of the second gas storage tank (53) is in communication with the pressure regulating valve (52) and is used for storing a second gas.

9. The experimental system for monitoring the phase change of a gas to be tested according to claim 7, characterized in that: The gas delivery assembly also includes: The switch valve (54) is installed between the first gas storage tank (51) and the inner cavity and is used to open and close the gas path between the first gas storage tank (51) and the inner cavity.

10. An experimental method for monitoring the phase change of a gas to be tested, characterized in that: The experimental method is applied to an experimental system for monitoring the phase change of a gas to be measured as described in any one of claims 1 to 9, and the experimental method comprises the following steps: Obtain simulation parameters and gas content parameters of the gas to be tested; Selecting corresponding gas according to the gas content parameter and introducing it into the reaction kettle (1); Adjusting the temperature of the reaction kettle (1) to a preset temperature by means of a temperature adjustment mechanism; The gas pressure of the reaction kettle (1) is adjusted within a pressure range corresponding to the simulation parameter by means of a pressure adjustment mechanism; Observing and recording the phase change of the gas to be measured in the reactor (1) to obtain the phase change trend of the gas to be measured at the preset temperature and different pressures; The pressure of the reaction kettle (1) is adjusted to a preset pressure by the pressure adjustment mechanism; The temperature of the reaction kettle (1) is adjusted within a temperature range corresponding to the simulation parameter by the temperature adjustment mechanism; The phase change of the gas to be measured in the reactor (1) is observed and recorded to obtain the phase change trend of the gas to be measured at the preset pressure and different temperatures.

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