A device for observing foam rheology and its microstructure under dynamic and static conditions.

Abstract

This invention relates to a device for observing the rheology of foam and its microstructure under dynamic and static conditions. The device comprises a high-pressure reactor, a water bath constant temperature chamber, a rotator, a torque and speed sensor, a ring-shaped searchlight, a high-speed microscopic camera, a T-shaped neodymium iron boron magnet, a cap, a foam injection tube, a Y-shaped tee, a screw pump, a gas tank, a liquid tank, LED lights, valves, a pressure transmitter, a temperature transmitter, a foam generator, a computer terminal, and a data acquisition system. This device measures the rheology of foam under different pressures and temperatures by injecting foam fluid into the high-pressure reactor. Simultaneously, the high-speed microscopic camera can observe and compare the microstructure of the foam under different shear rates and static states, thus achieving simultaneous research on foam structural and rheological parameters.

Description

Technical Field

[0001] This invention belongs to the field of foam fluid performance evaluation, and relates to a multifunctional device that can observe the rheological properties of foam and its microstructure under dynamic and static conditions. Background Technology

[0002] Foam is a dispersion system consisting of a liquid film separating gas. Foam fluids are widely used in commercial and industrial sectors, including the cosmetics, pharmaceutical, and food industries. They are also an effective method for environmental remediation and the removal of toxic substances from industrial wastewater. Furthermore, due to their advantages such as low liquid carrying capacity and minimal formation damage, they are also widely used in the petroleum industry.

[0003] There are various reagents capable of generating foam, and different types of surfactants produce foam structures that differ greatly. The foam structure is a crucial factor determining its stability, and the stability of the packing structure plays a decisive role in the stability of the foam liquid film. Therefore, the observation and study of the foam microstructure is of paramount importance.

[0004] Besides the microscopic mechanisms, the macroscopic properties of foam are also very important, and rheological studies are the most crucial aspect of macroscopic property research. In various foaming processes, the rheological properties of foam have a significant impact on its mass and heat transfer performance, and are directly related to its flow properties. When applied in the field, foams are generally in a flowing state, but foams generated by different surfactants are not entirely the same, and the multiphase composition leads to complex rheological behavior, resulting in uncertain flow characteristics. Therefore, it is necessary to determine their rheological properties.

[0005] Therefore, this invention designs a device for observing the rheology and microstructure of foam under dynamic and static conditions. While conducting rheological tests, it studies the microstructure of foam under different temperatures and pressures using optical methods, thereby combining microstructure with macroscopic rheology. Summary of the Invention

[0006] The purpose of this invention is to provide a device for observing the rheology of foam and its microstructure under dynamic and static conditions. This device can measure the rheology of foam under different pressure and temperature conditions, and simultaneously compare and observe the microstructure of foam under static and shear conditions.

[0007] To achieve the above functions, the technical method of the present invention is as follows:

[0008] A device for observing the rheology of foam and its microstructure under dynamic and static conditions. The device includes a high-pressure reactor, a water bath constant temperature chamber, a rotator, a torque and speed sensor, a ring-shaped searchlight, a high-speed microscopic camera, two T-shaped neodymium iron boron magnets, a cap, a foam injection tube, a Y-shaped tee, a screw pump, a gas tank, a liquid tank, LED lights, valves, a pressure transmitter, a temperature transmitter, a foam generator, a computer terminal, and a data acquisition system.

[0009] The rotor drives a torque-speed sensor via magnetic force. The torque-speed sensor is connected to a temperature transmitter and a pressure transmitter, allowing for real-time measurement of pressure and temperature within the high-pressure reactor. The lower rotor extends into a circular groove at the center of the reactor bottom, enabling measurement of torque at different speeds. The circular groove, fixed to the bottom of the reactor, is made of transparent quartz glass.

[0010] The high-pressure reactor has an outer wall, a water bath insulation layer, and an inner wall. Both the inner and outer walls are sealed by the reactor lid. The water bath insulation layer is located between the inner and outer walls. The outer wall has two circular holes, G and H, located at opposite ends. Hole G is the liquid inlet, and hole H is the liquid outlet. Both holes penetrate only the outer wall and are connected to the water bath thermostat via flexible hoses. When the water bath thermostat is set to the desired temperature, the temperature of the liquid inside gradually changes. Activating the circulation function causes the liquid to circulate between the water bath insulation layer and the water bath thermostat, thus altering the reactor's internal temperature. The outer wall is made of stainless steel, and the inner wall is made of quartz, both possessing high pressure resistance. The high-pressure reactor has two symmetrical grooves on its side, each containing only the inner wall. These grooves are sealed by stainless steel from the outer wall. An LED light is placed on one side, allowing observation of the reactor's interior from the other side.

[0011] One of the grooves has two smaller grooves symmetrically spaced inside and outside. These two smaller grooves are used for the vertical movement of two T-shaped NdFeB magnets. One of these T-shaped NdFeB magnets is located in the outer groove, and the other is in the inner groove of the high-pressure reactor. The inner T-shaped NdFeB magnet is fixed to a ring by a connecting rod. A ring-shaped searchlight and a high-speed microscopic camera are installed on the lower side of the ring. Dragging the outer T-shaped NdFeB magnet up and down allows the inner T-shaped NdFeB magnet to move up and down within the high-pressure reactor. After moving to the appropriate position, screws are inserted into the screw holes on the outer T-shaped NdFeB magnet, and simultaneously, screws are inserted into the screw holes on the side of the groove to fix the T-shaped NdFeB magnet, thus achieving the relatively fixed vertical movement of the high-speed microscopic camera and the ring-shaped searchlight within the high-pressure reactor. The ring-shaped searchlight encircles the torque and speed sensor, and under the illumination of the ring-shaped searchlight, the high-speed microscopic camera can clearly capture images of the inner and outer sides of the circular groove at the bottom of the reactor.

[0012] There is a circular hole B on the upper side of the high-pressure reactor for foam injection. A pressure-resistant bend is connected to the circular hole B. A hollow cube and a hollow ring are installed at the lower end of the pressure-resistant bend, and there are multiple circular holes D and E on its lower side. The pressure-resistant bend is connected to these circular holes. The hollow ring is located between the rotor of the torque and speed sensor and the ring-shaped searchlight, so that the foam flowing out of the circular hole E can flow evenly into the circular groove. The hollow cube is located outside the ring-shaped searchlight on the side of the high-speed microscope camera, so that the foam can be injected into the outer part of the circular groove and into the area that the high-speed microscope camera can capture. The circular hole B connects to a foam generator, which contains multiple layers of spiral steel wire mesh. A Y-shaped tee connects to the upper circular hole F, with a gas storage tank and a liquid storage tank connected to the other two sides of the tee. First, valve C is opened, then valve D and the screw pump are opened. The gas and liquid collide and contact fully in the foam generator to form foam. After sufficient foam is injected, valve D and the screw pump can be closed to stop the injection of foam base liquid. Gas injection continues to control the pressure inside the reactor. Another circular hole A at the bottom side of the high-pressure reactor is used to discharge foam and base liquid outside the bottom circular groove of the reactor.

[0013] A cap is installed in the center of the lower lid of the high-pressure reactor and fixed with screws. After the upper part of the cap is inserted, it is flush with the bottom surface of the lower lid. After the pressure inside the reactor drops to atmospheric pressure, the cap is removed, which can drain the foam and base liquid in the circular tank.

[0014] Using the aforementioned foam rheology and its microstructure observation device under dynamic and static conditions, the microstructure of foam under static and shear conditions can be observed simultaneously while measuring foam rheology. Foam base liquid and gas are mixed and contacted in a foam generator to produce foam, which enters the pressure-resistant bend of a high-pressure reactor through circular hole B. Part of the foam falls through circular hole D under the hollow cube to the outside of the circular groove at the bottom of the high-pressure reactor, while another part flows into the circular groove through circular hole E under the hollow ring. After a sufficient amount of foam is injected, a T-shaped neodymium iron boron magnet is moved up and down to pull the high-speed microscope camera and ring-shaped searchlight to the optimal shooting position and then fixed. The rotor is then turned on, and the torque-speed sensor starts operating under the drive of the rotor. The rotor shears the foam in the circular groove, and the torque is obtained according to different rotational speeds. Simultaneously, the ring-shaped searchlight and high-speed microscope camera are turned on to observe and record the effect of shearing inside the circular groove on the foam microstructure and the microstructure of the foam outside the circular groove under static conditions. To determine the rheological properties and microstructure of foam under specific temperature and pressure, the water bath thermostat can be set to the required temperature and the circulation function turned on. The insulating liquid circulates between the water bath thermostat and the water bath insulation layer, thereby changing the temperature inside the high-pressure reactor. After injecting sufficient foam, valve D connected to the foam generator and the screw pump are closed to stop the injection of the foam base liquid, while maintaining the inflow of gas. When the pressure reaches the measurement conditions, valve C is closed and the rotor is turned on, allowing observation and measurement of the rheological properties and microstructure of the foam under specific pressure and temperature. After the measurement is completed, the foam is allowed to stand in the high-pressure reactor for a period of time until it is completely defoamed. Then, valve B, connected to the circular hole A at the bottom side of the high-pressure reactor, is opened to completely drain the liquid outside the circular groove and simultaneously expel the gas inside the reactor. After the pressure drops to atmospheric pressure, the screw in the center of the bottom lid is unscrewed, and the lid is removed, allowing the base liquid in the circular groove to flow out from the bottom. Finally, distilled water is injected through the circular hole B to clean the high-pressure reactor to avoid affecting subsequent observations.

[0015] The present invention adopts the above technical solution and has the following advantages:

[0016] 1. This device can measure the rheological properties of foam while observing the effect of shearing on the microstructure of foam, thus combining structural parameters and rheological parameters.

[0017] 2. Under the illumination of a ring-shaped searchlight, a high-speed microscopic camera can simultaneously observe the foam inside and outside the circular groove, and compare the microstructure of the foam under shearing and static conditions.

[0018] 3. The high-temperature and high-pressure environment provided by the reactor can be used to determine the rheological properties and microstructure of foam fluid under certain temperature and pressure. Attached Figure Description

[0019] Figure 1 It is a plan view of the overall installation.

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of a high-pressure reactor;

[0021] Figure 3 This is a cross-sectional view of the central axis of the high-pressure reactor;

[0022] Figure 4 This is a side view of the central axis section of a high-pressure reactor;

[0023] Figure 5 This is a diagram showing the connection between a ring-shaped searchlight and a high-speed microscopic camera, which are fixed by T-shaped neodymium iron boron magnets.

[0024] Figure 6 This is a diagram of a torque and speed sensor;

[0025] Figure 7 This is a side view of the foam injection tube;

[0026] Figure 8 This is a diagram of the sealing at the center of the lower lid;

[0027] Figure 9 This is a cross-sectional view of a foam generator.

[0028] The components include: 1. High-pressure reactor; 2. Cover; 3. Circular hole A; 4. Screw hole for fixing the T-shaped neodymium iron boron magnet; 5. Circular hole B; 6. Water bath insulation layer; 7. Torque and speed sensor; 8. Pressure-resistant bend; 9. Circular bracket for fixing the ring-shaped searchlight and high-speed microscope camera; 10. Rotor; 11. Circular groove; 12. High-speed microscope camera; 13. Ring-shaped searchlight; 14. T-shaped neodymium iron boron magnet; 15. Circular hole C; 16. Circular hole D; 17. 18. Plug to fill the center hole of the lower kettle lid; 19. LED light; 20. Computer terminal and data acquisition system; 21. Foam generator; 22. Screw socket; 23. Valve A; 24. Valve B; 25. Circular hole F; 26. Spiral wire mesh; 27. Y-shaped tee; 28. Liquid storage tank; 29. ​​Gas storage tank; 30. Screw pump; 31. Valve C; 32. Circular hole G; 33. Circular hole H; 34. Water bath constant temperature chamber; 35. Valve D. Detailed Implementation

[0029] The invention will now be further described with reference to the accompanying drawings.

[0030] The present invention relates to a device for observing the rheology of foam and its microstructure under dynamic and static conditions. The device includes a high-pressure reactor, a water bath constant temperature chamber, a rotor, a torque and speed sensor, a ring-shaped searchlight, a high-speed microscopic camera, two T-shaped neodymium iron boron magnets, a cap, a foam injection tube, a Y-shaped tee, a screw pump, a gas storage tank, a liquid storage tank, an LED light, valves, a pressure transmitter, a temperature transmitter, a foam generator, a computer terminal, and a data acquisition system. The rotor (7) drives the torque and speed sensor inside the reactor to rotate through magnetic force. The torque and speed sensor is shown in Figure (6). The lower rotor (10) is in a circular groove (11) at the center of the bottom of the high-pressure reactor. The circular groove is fixed at the bottom and is made of quartz glass. The torque and speed sensor is equipped with a temperature transmitter and a pressure transmitter, which can measure the pressure and temperature inside the reactor in real time. The torque at different speeds can also be measured when the rotor shears the foam.

[0031] As shown in Figures (1) and (2), the side of the high-pressure reactor (1) is divided into an outer wall, a water bath insulation layer (6), and an inner wall. The inner and outer walls are both compacted by the reactor lid. The water bath insulation layer is in the gap between the inner and outer walls. The outer wall has a circular hole G (32) and a circular hole H (33) on the bottom and top, respectively. The circular hole G is the liquid inlet and the circular hole H is the liquid outlet. Both circular holes only penetrate the outer wall and are connected to the water bath constant temperature box (34) through a hose. When the water bath constant temperature box is set to the required temperature, the temperature of the liquid inside will gradually change. Then, the circulation function is turned on, and the liquid begins to circulate between the water bath insulation layer and the water bath constant temperature box, thereby changing the temperature inside the reactor. The outer wall material is stainless steel, and the inner wall material is quartz. Both have high pressure resistance. The high-pressure reactor has two symmetrical grooves on the side. Both grooves have only the inner wall surface. The outer wall is enclosed by stainless steel embedded in the inner wall surface. An LED light (19) is placed in one groove so that the reactor can be observed from the other side.

[0032] One of the grooves has two smaller grooves symmetrically opened inside and outside. The smaller grooves are used for the up and down movement of two T-shaped NdFeB magnets (14). One of the two T-shaped NdFeB magnets is in the small groove on the outside of the high-pressure reactor, and the other is in the small groove on the inside. The two attract each other. The inner T-shaped NdFeB magnet is fixed to a ring by a connecting rod. A ring-shaped searchlight (13) and a high-speed microscopic camera (12) are installed on the lower side of the ring. The connection method is shown in Figure (5). The outer T-shaped NdFeB magnet is dragged up and down. After moving to the appropriate position, the screw is inserted into the screw hole (22) on the outer T-shaped NdFeB magnet. At the same time, the screw hole (4) on the side of the groove is inserted to fix it. This realizes the up and down movement of the high-speed microscopic camera and the ring-shaped searchlight in the high-pressure reactor. The ring-shaped searchlight surrounds the torque and speed sensor. Under the illumination of the ring-shaped searchlight, the high-speed microscopic camera can clearly capture the inner and outer sides of the circular groove (11) at the bottom of the reactor.

[0033] The circular hole B (5) is a foam injection hole, which connects to the foam generator (21) outward and to the foam injection tube inward. The foam injection tube is shown in Figure (7). The lower end is connected to a hollow cube and a hollow ring respectively. There are multiple circular holes D (16) on the lower side of the hollow cube and multiple circular holes E (17) on the lower side of the hollow ring. Foam can flow into the circular hole B, pass through the circular hole C (15), and fall from the circular holes D and E. The hollow ring is located between the torque and speed sensor and the ring-shaped searchlight. The foam flowing out of the circular hole E can flow into the circular groove. The hollow cube is located outside the ring-shaped searchlight in the same position as the high-speed microscope camera, which can inject foam into the outer part of the circular groove and the area that the high-speed microscope camera can capture. The cross-sectional view of the foam generator is shown in Figure (9). There are multiple layers of spiral steel wire mesh (26) inside to increase the gas-liquid contact area.

[0034] The circular hole A (3) on the side of the bottom of the reactor can discharge the foam base liquid outside the circular groove at the bottom of the high pressure reactor. The center of the bottom cover of the reactor is sealed by a cap, as shown in Figure (8). The upper part (18) of the cap is inserted into the center of the bottom of the high pressure reactor and is flush with the inner bottom surface. It is also fixed by screws. After the gas is discharged from the circular hole A, the cap can be opened to discharge the foam and base liquid in the circular groove (11).

[0035] In use, foam base liquid and gas are mixed and contacted in a foam generator to generate foam. The foam enters the pressure-resistant bend of the high-pressure reactor through the round hole B (5). Part of the foam falls from the round hole D (16) under the hollow square to the outside of the round groove (11) at the bottom of the high-pressure reactor, and another part of the foam flows into the round groove through the round hole E (17) under the hollow ring. After a certain amount of foam is injected, the T-shaped neodymium iron boron magnet (14) is moved up and down to pull the high-speed microscopic camera (12) and the ring searchlight (13) to the best shooting position and then fixed. Then the rotator (7) is turned on, and the torque and speed sensor starts to operate under the drive of the rotator. The rotor (10) shears the foam in the round groove. The torque is measured according to the speed. At the same time, the ring searchlight and the high-speed microscopic camera are turned on to observe and record the effect of the shearing action inside the round groove on the microstructure of the foam and the microstructure of the foam outside the round groove in a static state. To determine the rheological properties and microstructure of foam under certain temperature and pressure, the water bath thermostat can be set to the required temperature and the circulation function can be turned on, allowing the insulation liquid to circulate between the water bath thermostat (34) and the water bath insulation layer (6) to change the temperature inside the high-pressure reactor. After sufficient foam is produced, the valve D (35) connected to the round hole F on the foam generator (21) is closed, while maintaining the inflow of gas. When the pressure reaches the measurement conditions, the valve C is closed, and the rotator, the ring searchlight, and the high-speed microscope camera are turned on to observe and measure the rheological characteristics and microstructure of foam under certain pressure and temperature. After the measurement is completed, the foam is left to stand in the high-pressure reactor for a period of time until it is completely defoamed. Then, the valve B (24) connected to the round hole A (3) at the bottom of the side of the reactor is opened to completely discharge the liquid outside the round groove and discharge the gas inside the reactor. After the pressure drops to normal pressure, the screw in the center of the bottom reactor cover is unscrewed and the cover (2) is removed. The base liquid in the round groove flows out from the bottom. Finally, distilled water is injected through the round hole B(5) to clean the high-pressure reactor, so as not to affect the next observation.

Claims

1. A device for observing the rheology of foam and its microstructure under dynamic and static conditions, employing a combination of optical microscopy and rheological methods to measure rheology while comparing the microstructure of foam under shear stress and at rest, characterized in that: The device includes a high-pressure reactor, a water bath constant temperature chamber, a rotor, a torque and speed sensor, a ring-shaped searchlight, a high-speed microscopic camera, two T-shaped neodymium iron boron magnets, a cap, a foam injection tube, a Y-shaped tee, a screw pump, a gas storage tank, a liquid storage tank, LED lights, valves, a pressure transmitter, a temperature transmitter, a foam generator, a computer terminal, and a data acquisition system. The rotor (7) drives the torque and speed sensor inside the reactor to rotate through magnetic force. The lower rotor (10) is located in a circular groove (11) at the center of the bottom of the high-pressure reactor. The circular groove is fixed to the bottom and is made of quartz glass. A temperature transmitter is installed on the torque and speed sensor to measure the pressure and temperature inside the reactor. The transmitter and pressure transmitter, the rotor is used to measure the torque of the foam at different speeds; the side of the high pressure reactor (1) is divided into an outer wall, a water bath insulation layer (6) and an inner wall. The upper and lower parts of the inner and outer walls are compacted by the reactor lid. The water bath insulation layer is in the gap between the inner and outer walls. The outer wall has a round hole G (32) and a round hole H (33) on the bottom and top. The round hole G is the liquid inlet and the round hole H is the liquid outlet. Both round holes only penetrate the outer wall and are connected to the water bath constant temperature box (34) through a hose. When the water bath constant temperature box is set to the required temperature, the temperature of the liquid in it will gradually change. Then turn on the circulation function, and the liquid will start to circulate in the water bath insulation layer and the water bath constant temperature box. The reactor circulates between chambers, thereby changing the temperature inside the reactor; the outer wall material is stainless steel, and the inner wall material is quartz, both of which have high pressure resistance; the high-pressure reactor has two symmetrical grooves on its side, both of which have only an inner wall surface, and their perimeter is sealed by stainless steel embedded in the outer wall surface to the inner wall surface. An LED light (19) is placed outside one groove, and the other side provides a clear view of the reactor's interior; one of the grooves has two symmetrical small grooves inside and outside, which are used for the up-and-down movement of two T-shaped neodymium iron boron magnets (14). One of the T-shaped neodymium iron boron magnets is in the small groove outside the high-pressure reactor, and the other is in the small groove inside the high-pressure reactor. The two attract each other, and the inner... The side T-shaped neodymium iron boron magnet is fixed to a ring by a connecting rod. A ring-shaped searchlight (13) and a high-speed microscopic camera (12) are installed on the lower side of the ring. The outer T-shaped neodymium iron boron magnet is dragged up and down to a suitable position. Then, the screw is inserted into the screw hole (22) on the outer T-shaped neodymium iron boron magnet and the screw hole (4) on the side of the groove is inserted to fix it. This achieves the relative fixed up and down movement of the high-speed microscopic camera and the ring-shaped searchlight in the high-pressure reactor. The ring-shaped searchlight surrounds the torque and speed sensor. Under the illumination of the ring-shaped searchlight, the high-speed microscopic camera can clearly capture the inner and outer sides of the circular groove (11) at the bottom of the reactor.The circular hole B (5) is a foam injection hole, which is connected to the foam generator (21) to the outside and to the foam injection tube to the inside. The lower end is connected to a hollow cube and a hollow ring respectively. There are multiple circular holes D (16) on the lower side of the hollow cube and multiple circular holes E (17) on the lower side of the hollow ring. The foam flows from the circular hole B through the circular hole C (15) and then falls from the circular holes D and E. The hollow ring is located between the torque and speed sensor and the ring-shaped searchlight. The foam flowing out of the circular hole E can flow into the circular groove. The hollow cube is located in the same position as the high-speed microscope camera in the ring-shaped searchlight. The outside of the lamp can inject foam into the area outside the circular groove and within the view of the high-speed microscopic camera; the inside of the foam generator has multiple layers of spiral steel wire mesh (26) to increase the gas-liquid contact area; the circular hole A (3) on the side of the bottom of the reactor can discharge the foam base liquid outside the circular groove at the bottom of the high-pressure reactor; the center of the bottom cover of the reactor is sealed by a cap, and the upper part (18) of the cap is inserted into the center of the bottom of the high-pressure reactor and is flush with the inner bottom surface, and is fixed by screws; after the gas is discharged from the circular hole A, the cap is opened to discharge the foam and base liquid in the circular groove (11).

2. The device for observing foam rheology and its microstructure under dynamic and static conditions as described in claim 1, characterized in that: In use, foam base liquid and gas are mixed and contacted in a foam generator to generate foam, which enters the pressure-resistant bend of the high-pressure reactor through the round hole B (5). Part of the foam falls from the round hole D (16) under the hollow square to the outside of the round groove (11) at the bottom of the high-pressure reactor, and another part of the foam flows into the round groove through the round hole E (17) under the hollow ring. After a certain amount of foam is injected, the T-shaped neodymium iron boron magnet (14) is moved up and down to pull the high-speed microscopic camera (12) and the ring searchlight (13) to the best shooting position and then fixed. Then the rotator (7) is turned on, and the torque and speed sensor starts to operate under the drive of the rotator. The rotor (10) shears the foam in the round groove to obtain the torque at different speeds. At the same time, the ring searchlight and the high-speed microscopic camera are turned on to observe and record the effect of the shearing action inside the round groove on the microstructure of the foam and the microstructure of the foam outside the round groove in a static state. If the rheological properties and microstructure of the foam under a certain temperature and pressure are to be measured, the water bath constant pressure is used to measure the microstructure of the foam. Set the temperature chamber to the required temperature and turn on the circulation function to allow the insulation liquid to circulate between the water bath constant temperature chamber (34) and the water bath insulation layer (6) to change the temperature inside the high-pressure reactor. After sufficient foam is generated, close the valve D (35) connected to the round hole F on the foam generator (21) while maintaining the inflow of gas. When the pressure reaches the measurement conditions, close the valve C and turn on the rotator, the ring searchlight and the high-speed microscopic camera to observe and measure the rheological characteristics and microstructure of the foam under certain pressure and temperature. After the measurement is completed, let the foam stand in the high-pressure reactor for a period of time until it is completely defoamed. Then, open the valve B (24) connected to the round hole A (3) at the bottom of the side of the reactor to completely drain the liquid outside the round groove and at the same time drain the gas inside the reactor. After the pressure drops to normal pressure, unscrew the screw in the center of the bottom reactor cover and remove the cover (2). The base liquid in the round groove flows out from the bottom. Finally, inject distilled water through the round hole B (5) to clean the high-pressure reactor to avoid affecting the next observation.

3. The device for observing foam rheology and its microstructure under dynamic and static conditions as described in claim 1, characterized in that: The rotor (10) was used to shear the foam in the bottom circular groove (11) of the high-pressure reactor to obtain the torque at different speeds. The rheological properties of the foam were analyzed in this way. A high-speed microscopic camera was used to observe the foam inside and outside the circular groove at the same time to compare the microstructure of the foam under shearing and static conditions.

4. The device for observing foam rheology and its microstructure under dynamic and static conditions as described in claim 1, characterized in that: The high-temperature and high-pressure environment provided by the high-pressure reactor enables the determination of the rheological properties and microstructure of foam under certain temperature and pressure conditions.

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