Miscible phase deposition adsorption thermal conductivity monitoring device and monitoring method for wax-bearing crude oil in shaft

Abstract

The invention relates to the technical field of monitoring equipment, and discloses a device and method for monitoring the mixed-phase deposition adsorption thermal conductivity of wax-bearing crude oil in a shaft, and the device comprises a reaction kettle, a mixed-phase wax-bearing sediment adsorption thermal conductivity monitoring module, a pressure control module, a material control module and a temperature control module; a mixed-phase wax-containing sediment adsorption thermal conductivity monitoring module is arranged in the reaction kettle and is used for adsorbing mixed-phase wax-containing sediment in the reaction kettle and monitoring thermal conductivity; the pressure control module is arranged at the top of the reaction kettle and is used for performing constant-pressure control on the reaction kettle; one part of the material control module is arranged inside the reaction kettle, the other part of the material control module is arranged outside the reaction kettle, the material control module is used for conveying monitoring materials into the reaction kettle, and the materials comprise a liquid medium and mixed-phase wax-containing sediments; the temperature control module is arranged outside the reaction kettle and is used for providing constant-temperature heat preservation for the reaction kettle. The sediment thermal conductivity change can be monitored through the pressure-temperature sensor, and the problem that shaft blocking cannot be dynamically predicted is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of monitoring equipment, and in particular to a device and method for monitoring the thermal conductivity of waxy crude oil miscible deposition adsorption in a wellbore. Background Art

[0002] Miscible waxy sediments refer to miscible sediments with a high proportion of wax. In wellbore sediments, miscible waxy sediments usually refer to a mixture of a high proportion of liquid high-carbon chain normal alkanes and a low proportion of gaseous low-carbon chain normal alkanes or gaseous carbon dioxide hydrates. Specifically, waxy sediments refer to sediments with a carbon number between C 10 -C 20 The solid particle size of mixed phase sediments is between 100-200μm, while the solid particle size of mixed phase sediments refers to gases with carbon numbers between C4-C8 or carbon dioxide gas, water and waxy sediments, with a particle size of 50-200μm.

[0003] Therefore, in the development and exploitation of deep-sea or low-temperature oil fields, waxy crude oil is prone to precipitate wax crystals due to temperature drop, forming co-crystallization sediments with hydrates to block the wellbore. Since the sediment particle size gradually increases from unsaturated to saturated during the sedimentation process, the thermal resistance value of the sediment changes from low resistance to high resistance until it stabilizes. The transformation process of sediments during engineering development will cause wellbore blockage problems. How to monitor the thermal conductivity change law of sediment particle size is a technical problem that urgently needs to be solved. Summary of the Invention

[0004] In response to the above problems, the purpose of the present invention is to provide a device and method for monitoring the thermal conductivity of waxy crude oil mixed phase deposition adsorption in a wellbore, which effectively solves the technical difficulties that pressure-temperature sensors cannot directly correlate with changes in the thermal conductivity of sediments and wellbore blockage cannot be dynamically predicted.

[0005] To achieve the above-mentioned objectives, in a first aspect, the technical solution adopted by the present invention is: a device for monitoring the adsorption thermal conductivity of mixed-phase deposition of waxy crude oil in a wellbore, which includes: a reactor, a mixed-phase waxy sediment adsorption thermal conductivity monitoring module, a pressure control module, a material control module and a temperature control module; a mixed-phase waxy sediment adsorption thermal conductivity monitoring module is provided in the reactor, which is used to adsorb the mixed-phase waxy sediment in the reactor and monitor the thermal conductivity in parallel; the pressure control module is arranged at the top of the reactor, which is used to control the constant pressure of the reactor; a part of the material control module is arranged inside the reactor, and the other part is arranged outside the reactor, which is used to transport monitoring material into the reactor, and the material includes a liquid medium and mixed-phase waxy sediment; the temperature control module is arranged outside the reactor, which is used to provide constant temperature insulation for the reactor.

[0006] Furthermore, the mixed phase wax-containing sediment adsorption thermal conductivity monitoring module includes a socket, a porous adsorption net, a thermistor, a first sensor connecting wire, a thermal conductivity resistance value measuring device, a second sensor connecting wire and a data processor; On the front and rear sides of the top of the reactor, there are respectively provided with insertion holes along the height direction of the reactor, and the insertion holes penetrate the top of the reactor; and the bottom of each insertion hole is sealed with a porous adsorption net; The porous adsorption net is arranged in the reactor, the top end of the porous adsorption net is sealedly connected to the bottom of the socket, and the bottom end of the porous adsorption net is close to the bottom of the reactor; The thermistors are fixedly installed on the porous adsorption net and are arranged in three groups along the height direction of the porous adsorption net, namely, upper, middle and lower groups. The thermistors monitor the heat changes and generate electrical signals. A first sensor connecting line passes through the porous adsorption net along its height direction. One end of the first sensor connecting line connects the three thermistors in series, and the other end of the first sensor connecting line passes through the reactor through the jack and is connected to a thermal resistance value meter located outside the reactor. The electrical signal monitored by the thermistors is transmitted to the thermal resistance value meter for measurement. The thermal conductivity resistance value measuring device is connected to the data processor via the second sensor connection line, and the data output by the thermal conductivity resistance value measuring device is processed.

[0007] Furthermore, the top of the porous adsorption net is made of rubber material.

[0008] Furthermore, the pore adsorption network is set to four different pore groups of 50 μm, 100 μm, 150 μm, and 200 μm.

[0009] Furthermore, the pressure control module includes a first air pipe, a back pressure valve, a pressure regulator and a needle valve; One end of the first air pipe passes through the top of the reactor and is inserted into the reactor, and the other end of the first air pipe is connected to a constant pressure device located outside the reactor; The back pressure valve is fixedly arranged at the middle position of the first air pipe, and the needle valve is arranged on the pressure regulator.

[0010] Further, the material control module includes a second air pipe, a pressure reducing valve, a wide-mouth bottle, and a liquid sample suction tube; One end of the second air pipe passes through the top of the reactor and is inserted into the reactor; the other end of the second air pipe is connected to a wide-mouth bottle located outside the reactor; One end of the liquid sample suction tube passes through the top of the reactor, is inserted into the reactor, and is arranged in parallel with the second air pipe. The other end of the liquid sample suction tube extends to the outside of the reactor.

[0011] Furthermore, the temperature control module includes a temperature control jacket and fixing bolts; The temperature control jacket is arranged on the outside of the reactor to wrap the front and rear sides of the reactor, and the fixing bolts pass through the temperature control jacket to fix the temperature control jacket on the reactor.

[0012] Furthermore, the reactor is a sapphire reactor.

[0013] In a second aspect, the present invention adopts a technical solution: a monitoring method based on the above-mentioned waxy crude oil mixed phase deposition adsorption thermal conductivity monitoring device in the wellbore, comprising: adding a liquid medium into the reactor through a liquid sample suction tube; opening a pressure reducing valve to pass the waxy crude oil emulsion in the wide-mouth bottle into the sapphire reactor through a second air pipe, while controlling a constant pressure control in the reactor through the first air pipe, maintaining a constant temperature of the gas and liquid phases in the reactor through a temperature control jacket, and opening a thermal resistance meter and a data processor; monitoring the thermal conductivity of the mixed phase waxy deposits in the reactor during the adsorption process by thermistors, and starting monitoring with three groups of upper and lower thermistors. The porous adsorption net adsorbs the mixed phase waxy deposits to release heat, and the thermistors monitor the heat change to generate an electrical signal, which is transmitted to the thermal resistance meter through a first sensor connection line; and transmitting data output by the thermal resistance meter to the data processor through a second sensor connection line for analysis and processing of the adsorption data.

[0014] Furthermore, among the three groups of thermistors, the upper thermistor is used to monitor the adsorption state of the upper gas phase, the middle thermistor is used to monitor the interface between the gas phase and the liquid phase, and the lower thermistor is used to monitor the adsorption situation in the liquid phase; until the pore adsorption network reaches a saturated adsorption state, the thermistor transmits the adsorption data to the thermal conductivity resistance meter for measurement.

[0015] The present invention has the following advantages due to the adoption of the above technical solution: The present invention controls the ambient pressure through a constant pressure device, controls the temperature through a temperature-control jacket, controls the amount of liquid injected into a reactor through a liquid sample suction tube, monitors the thermal conductivity and adsorption of mixed-phase wax-containing sediments through a thermistor, transmits the resistance signal to a thermal resistance value measuring device for display through a first sensor connection line, and analyzes the thermal conductivity and deposition and adsorption status of the mixed-phase wax-containing sediments through a data processor, thereby effectively solving the problem of being unable to dynamically predict wellbore blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the overall structure of a device for monitoring the miscible deposition adsorption thermal conductivity of waxy crude oil in a wellbore according to an embodiment of the present invention; Figure 2 2 is a schematic diagram of the rear view of the structure of the device for monitoring the miscible deposition adsorption thermal conductivity of waxy crude oil in a wellbore according to an embodiment of the present invention; Figure 32 is a schematic side view of the structure of a device for monitoring the miscible deposition adsorption thermal conductivity of waxy crude oil in a wellbore according to an embodiment of the present invention; Figure 4 Schematic diagram of the top structure of a device for monitoring the thermal conductivity of waxy crude oil miscible deposition adsorption in a wellbore according to an embodiment of the present invention; Reference numerals: 1. Sapphire reactor; 2. Mixed-phase waxy sediment adsorption thermal conductivity monitoring module; 3. Pressure control module; 4. Material control module; 5. Temperature control module; 6. Jack; 7. Porous adsorption net; 8. Thermistor; 9. First sensor connection line; 10. Thermal conductivity value measuring device; 11. Second sensor connection line; 12. Data processor; 13. First air pipe; 14. Back pressure valve; 15. Regulator; 16. Needle valve; 17. Second air pipe; 18. Pressure reducing valve; 19. Wide-mouth bottle; 20. Liquid sample suction tube; 21. Temperature control jacket; 22. Fixing bolts. DETAILED DESCRIPTION

[0017] In order to solve the problem of waxy crude oil easily precipitating wax crystals due to temperature drop during the development and exploitation of deep-sea or low-temperature oil fields, which forms co-crystallized sediments with hydrates and blocks the wellbore, it is necessary to study the adsorption characteristics of mixed-phase waxy sediments and determine the deposition and adsorption state in the wellbore based on their thermal conductivity, so as to develop blockage prevention and control technologies to achieve efficient exploitation. To this end, the present invention proposes a device for monitoring the thermal conductivity of mixed-phase deposition adsorption of waxy crude oil in a wellbore, comprising a sapphire reactor, a mixed-phase waxy sediment adsorption thermal conductivity monitoring module, a pressure control module, a material control module, and a temperature control module. The hydrocarbon-rich gas reservoir turbulence state monitoring structure is arranged on the sapphire reactor, the pressure control module is arranged on the sapphire reactor, the material control module is arranged on the mixed-phase waxy sediment adsorption thermal conductivity monitoring module, and the temperature control module is arranged on the sapphire reactor. The present invention effectively solves the technical problems that the pressure-temperature sensor cannot directly correlate with the change in sediment thermal conductivity and that wellbore blockage cannot be dynamically predicted.

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of the present invention.

[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0020] In one embodiment of the present invention, a device for monitoring the thermal conductivity of waxy crude oil mixed phase deposition adsorption in a wellbore is provided. In this embodiment, Figures 1 to 4 As shown, the device includes: a reactor 1, a mixed phase waxy sediment adsorption thermal conductivity monitoring module 2, a pressure control module 3, a material control module 4 and a temperature control module 5. Among them: The reactor 1 is provided with a mixed phase waxy sediment adsorption thermal conductivity monitoring module 2, which is used for adsorbing the mixed phase waxy sediment in the reactor 1 and performing thermal conductivity monitoring. The pressure control module 3 is arranged on the top of the reactor 1 and is used to perform constant pressure control on the reactor 1; The material control module 4 is partially disposed inside the reactor 1 and the other part is disposed outside the reactor 1, and is used to deliver monitoring materials into the reactor 1, the materials including liquid medium and mixed phase wax-containing sediment; The temperature control module 5 is arranged outside the reactor 1 and is used to provide constant temperature insulation for the reactor 1 .

[0021] In the above embodiment, the reactor 1 is a sapphire reactor, which can be used to observe the gaseous, mixed and liquid deposition processes during the stabilization process of the waxy crude oil emulsion and CO2 gas.

[0022] In the above embodiment, Figure 1 、 Figure 2 and Figure 4 As shown, the mixed phase wax-containing sediment adsorption thermal conductivity monitoring module 2 includes a socket 6, a porous adsorption network 7, a thermistor 8, a first sensor connection line 9, a thermal conductivity resistance value measuring device 10, a second sensor connection line 11 and a data processor 12. Specifically: On the front and rear sides of the top of the reactor 1, there are respectively provided with insertion holes 6 along the height direction of the reactor 1, and the insertion holes 6 pass through the top of the reactor 1; and the bottom of each insertion hole 6 is sealed with a porous adsorption net 7; The porous adsorption net 7 is arranged in the reactor 1, and its top end is sealedly connected to the bottom of the insertion hole 6, and the bottom end of the porous adsorption net 7 is close to the bottom of the reactor 1; The thermistors 8 are fixedly mounted on the porous adsorption net 7 and are spaced apart in three groups, namely, upper, middle, and lower, along the height direction of the porous adsorption net 7 to monitor the adsorption effect of different layers of materials. The thermistors 8 monitor the heat change and generate an electrical signal. A first sensor connecting line 9 passes through the porous adsorption net 7 along its height direction. One end of the first sensor connecting line 9 connects the three thermistors 8 in series, the upper, middle, and lower. The other end of the first sensor connecting line 9 passes through the reactor 1 through the jack 6 and is connected to a thermal resistance measuring device 10 located outside the reactor 1. The electrical signal monitored by the thermistors 8 is transmitted to the thermal resistance measuring device 10 for measurement. The thermal conductivity resistance value measuring device 10 is connected to a data processor 12 via a second sensor connection line 11 , and processes the data output by the thermal conductivity resistance value measuring device 10 .

[0023] In this embodiment, the top of the pore adsorption net 7 is made of rubber material to effectively seal the insertion hole 6. The pore adsorption net 7 is provided with four groups of different pores from small to large to achieve the effect of monitoring the adsorption of different pores.

[0024] For example, in this embodiment, the porous adsorption net 7 is set to have four groups of different pores of 50 μm, 100 μm, 150 μm, and 200 μm, which are evenly arranged along the four sides of the kettle body.

[0025] In the above embodiment, Figure 1 As shown, the pressure control module 3 includes a first air pipe 13, a backpressure valve 14, a pressure regulator 15, and a needle valve 16. One end of the first air pipe 13 passes through the top of the reactor 1 and is inserted into the reactor 1. The other end of the first air pipe 13 is connected to the pressure regulator 15 located outside the reactor 1. The backpressure valve 14 is fixedly installed in the middle of the first air pipe 13, and the needle valve 16 is installed on the pressure regulator 15.

[0026] In the above embodiment, in order to better achieve the effect of adding sample gas, as shown in FIG. Figure 1 As shown, the material control module 4 includes a second air pipe 17, a pressure reducing valve 18, a wide-mouth bottle 19, and a liquid sample suction tube 20. One end of the second air pipe 17 passes through the top of the reactor 1 and is inserted into the reactor 1, juxtaposed with the first air pipe 13 in the pressure control module 3. The other end of the second air pipe 17 is connected to the wide-mouth bottle 19 located outside the reactor 1. One end of the liquid sample suction tube 20 passes through the top of the reactor 1 and is inserted into the reactor 1, juxtaposed with the second air pipe 17. The other end of the liquid sample suction tube 20 extends to the outside of the reactor 1 and is connected to a sample tank storing the liquid sample via a control valve.

[0027] In the above embodiment, in order to achieve the purpose of temperature control more quickly, as shown in FIG. Figures 1 to 3 As shown, the temperature control module 5 includes a temperature control jacket 21 and fixing bolts 22. The temperature control jacket 21 is arranged on the outside of the reactor 1, wrapping the front and rear sides of the reactor 1, and the fixing bolts 22 pass through the temperature control jacket 21 to fix the temperature control jacket 21 on the reactor 1.

[0028] In one embodiment of the present invention, a method for monitoring the thermal conductivity of miscible deposition of waxy crude oil in a wellbore is provided. This method is based on the apparatus for monitoring the thermal conductivity of miscible deposition of waxy crude oil in a wellbore according to the above embodiments. Specifically, in this embodiment, the method includes the following steps: 1) Adding liquid medium into the reactor 1 through the liquid sample suction tube 20; 2) Open the pressure reducing valve 18 to pass the waxy crude oil emulsion in the wide-mouth bottle 19 into the sapphire reactor 1 through the second air pipe 17. Simultaneously, control the barostat 15 to maintain constant pressure in the sapphire reactor 1 through the first air pipe 13. The temperature-control jacket 21 is used to maintain a constant temperature for both the gas and liquid phases in the sapphire reactor 1. Turn on the thermal resistance meter 10 and the data processor 12. 3) The thermal conductivity of the mixed-phase wax-containing sediment in the sapphire reactor 1 during the adsorption process is monitored by thermistors 8. At this time, the upper, middle, and lower groups of thermistors 8 on the porous adsorption net 7 begin monitoring. The mixed-phase wax-containing sediment is adsorbed by the porous adsorption net 7, releasing heat. The thermistors 8 monitor the heat change and generate an electrical signal, which is transmitted to the thermal conductivity value measuring device 10 via the first sensor connection line 9. In this embodiment, the thermistor 8 located at the top is used to monitor the adsorption state of the upper gas phase zone in the reactor, the thermistor 8 located in the middle is used to monitor the boundary position between the gas phase and the liquid phase, and the thermistor 8 located at the bottom is used to monitor the adsorption situation in the liquid phase until the porous adsorption network 7 reaches a saturated adsorption state. At this time, the thermistor 8 transmits the adsorption data to the thermal resistance value meter 10 for measurement.

[0029] 3) The data output by the thermal conductivity resistance measuring device 10 is transmitted to the data processor 12 via the second sensor connection line 11 for analysis and processing of the adsorption data, thereby completing the entire monitoring process of the adsorption thermal conductivity of the mixed phase wax-containing sediment.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A device for monitoring the thermal conductivity of waxy crude oil miscible deposition adsorption in a wellbore, characterized in that: include: Reactor, mixed phase waxy sediment adsorption thermal conductivity monitoring module, pressure control module, material control module and temperature control module; A mixed phase waxy sediment adsorption thermal conductivity monitoring module is provided in the reactor, which is used for adsorption of the mixed phase waxy sediment in the reactor and parallel thermal conductivity monitoring; The pressure control module is set on the top of the reactor to control the constant pressure of the reactor; A portion of the material control module is disposed inside the reactor, and another portion is disposed outside the reactor, for conveying monitoring materials into the reactor, the materials comprising a liquid medium and a mixed phase wax-containing sediment; The temperature control module is arranged outside the reactor to provide constant temperature insulation for the reactor.

2. The device for monitoring the thermal conductivity of waxy crude oil miscible deposition adsorption in a wellbore according to claim 1, characterized in that: The mixed phase wax-containing sediment adsorption thermal conductivity monitoring module includes a socket, a pore adsorption net, a thermistor, a first sensor connecting line, a thermal conductivity value measuring device, a second sensor connecting line and a data processor; On the front and rear sides of the top of the reactor, there are respectively provided with insertion holes along the height direction of the reactor, and the insertion holes penetrate the top of the reactor; and the bottom of each insertion hole is sealed with a porous adsorption net; The porous adsorption net is arranged in the reactor, the top end of the porous adsorption net is sealedly connected to the bottom of the socket, and the bottom end of the porous adsorption net is close to the bottom of the reactor; The thermistors are fixedly installed on the porous adsorption net and are arranged in three groups along the height direction of the porous adsorption net, namely, upper, middle and lower groups. The thermistors monitor the heat changes and generate electrical signals. A first sensor connecting line passes through the porous adsorption net along its height direction. One end of the first sensor connecting line connects the three thermistors in series, and the other end of the first sensor connecting line passes through the reactor through the jack and is connected to a thermal resistance value meter located outside the reactor. The electrical signal monitored by the thermistors is transmitted to the thermal resistance value meter for measurement. The thermal conductivity resistance value measuring device is connected to the data processor via the second sensor connection line, and the data output by the thermal conductivity resistance value measuring device is processed.

3. The device for monitoring the thermal conductivity of waxy crude oil miscible deposition adsorption in a wellbore according to claim 2, characterized in that: The top of the porous adsorption net is made of rubber material.

4. The device for monitoring the thermal conductivity of waxy crude oil miscible deposition adsorption in a wellbore according to claim 2, characterized in that: The pore adsorption network is set to four different pore sizes of 50μm, 100μm, 150μm, and 200μm.

5. The device for monitoring the thermal conductivity of waxy crude oil miscible deposition adsorption in a wellbore according to claim 1, characterized in that: The pressure control module includes a first air pipe, a back pressure valve, a pressure regulator and a needle valve; One end of the first air pipe passes through the top of the reactor and is inserted into the reactor, and the other end of the first air pipe is connected to a constant pressure device located outside the reactor; The back pressure valve is fixedly arranged at the middle position of the first air pipe, and the needle valve is arranged on the pressure regulator.

6. The device for monitoring the thermal conductivity of waxy crude oil miscible deposition adsorption in a wellbore according to claim 1, characterized in that: The material control module includes a second air pipe, a pressure reducing valve, a wide-mouth bottle and a liquid sample suction tube; One end of the second air pipe passes through the top of the reactor and is inserted into the reactor; the other end of the second air pipe is connected to a wide-mouth bottle located outside the reactor; One end of the liquid sample suction tube passes through the top of the reactor, is inserted into the reactor, and is arranged in parallel with the second air pipe. The other end of the liquid sample suction tube extends to the outside of the reactor.

7. The device for monitoring the thermal conductivity of waxy crude oil miscible deposition adsorption in a wellbore according to claim 1, characterized in that: The temperature control module includes a temperature control jacket and fixing bolts; The temperature control jacket is arranged on the outside of the reactor to wrap the front and rear sides of the reactor, and the fixing bolts pass through the temperature control jacket to fix the temperature control jacket on the reactor.

8. The device for monitoring the thermal conductivity of waxy crude oil miscible deposition adsorption in a wellbore according to claim 1, characterized in that: The reactor adopts a sapphire reactor.

9. A monitoring method based on the device for monitoring the miscible deposition adsorption thermal conductivity of waxy crude oil in a wellbore according to any one of claims 1 to 8, characterized in that: include: Add liquid medium into the reactor through the liquid sample suction tube; Open the pressure reducing valve and pass the waxy crude oil emulsion in the wide-mouth bottle into the sapphire reactor through the second air pipe. At the same time, control the constant pressure of the reactor through the first air pipe. The gas and liquid phases in the reactor are kept at a constant temperature by the temperature-control jacket. Turn on the thermal resistance meter and the data processor. The thermal conductivity of the mixed-phase wax-containing sediment in the reactor during the adsorption process is monitored by thermistors. The upper and lower three groups of thermistors begin to monitor the mixed-phase wax-containing sediment. The porous adsorption net adsorbs the mixed-phase wax-containing sediment to release heat. The thermistors monitor the heat change and generate an electrical signal which is transmitted to the thermal conductivity value measuring device through the first sensor connection line. The data output by the thermal conductivity resistance value measuring device is transmitted to the data processor through the second sensor connection line to analyze and process the adsorption data.

10. The monitoring method according to claim 9, wherein: Among the three groups of thermistors, the upper thermistor is used to monitor the adsorption state of the upper gas phase, the middle thermistor is used to monitor the interface between the gas phase and the liquid phase, and the lower thermistor is used to monitor the adsorption situation in the liquid phase; until the pore adsorption network reaches the saturated adsorption state, the thermistor transmits the adsorption data to the thermal conductivity resistance meter for measurement.

Images