Hydrate particle growth experiment device and experiment method based on X-ray CT

Abstract

The invention discloses an X-ray CT-based hydrate particle growth experimental device and experimental method.The X-ray CT-based hydrate particle growth experimental device comprises a reaction kettle, an X-ray CT, a temperature regulation and control assembly and a gas conveying and pressure regulating assembly, a sample column is detachably installed in the reaction kettle and used for containing a sample, and the temperature regulation and control assembly is arranged to be capable of regulating and controlling the temperature in the reaction kettle; the X-ray CT is arranged to be capable of scanning a sample placed on a sample column in the reaction kettle, and the gas conveying and pressure regulating assembly is arranged to be capable of conveying gas required by an experiment into the reaction kettle or extracting the gas in the reaction kettle for pressure regulation; according to the experimental device designed by the invention, the hydrate grows under the condition that the hydrate on the surface of the ice particle is completely decomposed and undecomposed residual hydrate is reserved, and some residual hydrate is reserved as seed crystals to induce the growth of the hydrate on the surface of a water drop in the process; the growth of hydrate particles can be effectively promoted, the experiment efficiency is remarkably improved, and the total time cost of the experiment is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrate growth, and particularly to an experimental device and method for hydrate particle growth based on X-ray CT. Background Art

[0002] Gas hydrates are cage-like crystal structures formed by gas molecules (such as methane, carbon dioxide, etc.) and water molecules under specific conditions. Such structures widely exist in nature, especially in submarine sediments and permafrost. The formation of gas hydrates is of great significance in the fields of energy, environment, and geology. In the energy field, methane hydrate is considered a potential future energy resource. In environmental science, the formation process of carbon dioxide hydrate can be used to study carbon dioxide capture and storage technologies, which helps to reduce greenhouse gas emissions.

[0003] However, when the existing experimental device for hydrate particle (the microscopic manifestation form of gas hydrate) growth generates hydrates on the surface of water droplets, it requires a long waiting time, significantly reducing the experimental efficiency and increasing the total time cost of the experiment.

[0004] Therefore, there is an urgent need for an experimental device and method for hydrate particle growth based on X-ray CT to solve the above technical problems. Summary of the Invention

[0005] The present invention aims to solve the above technical problems, that is, to solve the problem that when the existing experimental device for hydrate particle growth generates hydrates on the surface of water droplets, it requires a long waiting time, significantly reducing the experimental efficiency and increasing the total time cost of the experiment.

[0006] To this end, in a first aspect, the present invention provides an experimental device for hydrate particle growth based on X-ray CT, including a reaction kettle, an X-ray CT, a temperature control component, and a gas transmission and pressure regulation component. A sample column is detachably installed in the reaction kettle for placing samples. The temperature control component is configured to be able to control the temperature in the reaction kettle. The X-ray CT is configured to be able to scan the samples placed on the sample column in the reaction kettle to obtain CT scan images. The gas transmission and pressure regulation component is configured to be able to convey the gases required for the experiment into the reaction kettle or extract the gases in the reaction kettle for pressure regulation.

[0007] In the specific implementation manner of the above-mentioned hydrate particle growth experimental device based on X-ray CT, the gas transmission and pressure regulation assembly includes a gas storage cylinder, a plunger pump, a vacuum pump, and an intake pipeline. One end of the intake pipeline is communicated with the inside of the reaction kettle. The gas storage cylinder conveys the gas required for the experiment into the intake pipeline through the plunger pump to reach the inside of the reaction kettle. The vacuum pump is connected to the intake pipeline and is used to extract the gas in the reaction kettle. A pressure sensor is installed on the intake pipeline.

[0008] In the specific implementation manner of the above-mentioned hydrate particle growth experimental device based on X-ray CT, the gas transmission and pressure regulation assembly further includes a first circulating water bath. A cooling jacket is installed on the outer side of the pump body of the plunger pump. The first circulating water bath is communicated with the cooling jacket.

[0009] In the specific implementation manner of the above-mentioned hydrate particle growth experimental device based on X-ray CT, the reaction kettle includes a base and a housing. The housing is detachably and fixedly connected to the base. The sample column is detachably and fixedly connected to the base inside the housing. In the specific implementation manner of the above-mentioned hydrate particle growth experimental device based on X-ray CT, the temperature regulation assembly includes a temperature controller, a semiconductor cooler connected to the temperature controller, a first temperature sensor, and a second temperature sensor. The semiconductor cooler is installed at the bottom of the base. The first temperature sensor is installed inside the base. The second temperature sensor is installed at the top end of the housing.

[0010] In the specific implementation manner of the above-mentioned hydrate particle growth experimental device based on X-ray CT, the temperature regulation assembly further includes a water tank and a second circulating water bath. The water tank is arranged below the semiconductor cooler, and the hot end face of the semiconductor cooler is attached to the top face of the water tank. The second circulating water bath is communicated with the water tank.

[0011] In the specific implementation manner of the above-mentioned hydrate particle growth experimental device based on X-ray CT, an air intake groove communicated with the inside of the housing is provided on the base. The air intake groove is connected to the gas transmission and pressure regulation assembly.

[0012] In a second aspect, the present invention further provides an experimental method using the hydrate particle growth experimental device based on X-ray CT described in any one of the first aspects. The experimental method includes the following steps: Place a sample on the sample column; After the placement is completed, use the temperature control component to adjust the temperature in the reaction kettle to reach the preset freezing temperature. After the sample is completely frozen to form ice particles, use the gas transmission and pressure regulation component to evacuate the reaction kettle, and then stop when the pressure inside the reaction kettle reaches the first set pressure by filling the reaction kettle with the gas required for the experiment through the gas transmission and pressure regulation component; When it is determined that there is hydrate on the surface of the ice particles formed by the freezing of the sample, use the temperature control component to increase the temperature in the reaction kettle and reach the experimental temperature, and then use the gas transmission and pressure regulation component to regulate the pressure in the reaction kettle to decrease and reach the second set pressure to decompose the formed hydrate; When it is determined that the hydrate on the surface of the ice particles is completely decomposed and there is undecomposed residual hydrate remaining, regulate the pressure in the reaction kettle to increase to reach the experimental pressure and maintain it through the gas transmission and pressure regulation component, so that the hydrate grows; Control the X-ray CT to scan the hydrate in the reaction kettle to obtain a CT scan growth image for observing the growth change of the hydrate. At the same time, start timing when scanning the growth change of the hydrate, and stop scanning until the scanning time reaches the preset time.

[0013] In the specific implementation manner of the above experimental method using the experimental device for hydrate particle growth based on X-ray CT, the step of "determining that there is hydrate on the surface of the ice particles formed by the freezing of the sample" specifically includes: Real-time control the X-ray CT to scan the ice particles in the reaction kettle to obtain a CT scan ice particle image; Determine that there is hydrate on the surface of the ice particles according to the change of the obtained CT scan ice particle image.

[0014] In the specific implementation manner of the above experimental method using the experimental device for hydrate particle growth based on X-ray CT, the step of "determining that the hydrate on the surface of the ice particles is completely decomposed and there is undecomposed residual hydrate remaining" specifically includes: Real-time control the X-ray CT to scan the hydrate in the reaction kettle to obtain a CT scan hydrate decomposition image; Determine that the hydrate on the surface of the ice particles is completely decomposed and there is undecomposed residual hydrate remaining according to the change of the real-time obtained CT scan hydrate decomposition image.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The temperature control component and the gas transmission and pressure regulation component designed in the present invention cooperate with each other, enabling hydrate crystals to form on the surface of ice particles formed by freezing. Then, under set conditions, the ice melts and the hydrate decomposes. When it is determined that the hydrate on the surface of the ice particles is completely decomposed and there remains undecomposed residual hydrate, the pressure in the reaction kettle is regulated by the gas transmission and pressure regulation component to increase and reach the experimental pressure to allow the hydrate to grow. During this process, some residual hydrate is retained as seeds to induce the growth of hydrate on the surface of water droplets, thereby effectively promoting the growth of hydrate particles, significantly improving the efficiency of the experiment, and reducing the total time cost of the experiment.

[0016] 2. The present invention uses X-ray CT technology to observe the growth and decomposition processes of hydrate particles in real time and non-destructively, providing high-resolution three-dimensional images, which helps to deeply study the microstructure and growth mechanism of hydrates. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, in which: Figure 1 is a schematic structural diagram of a hydrate particle growth experiment device based on X-ray CT provided by the present invention.

[0018] LIST OF REFERENCE NUMERALS: 1. Vacuum pump; 2. Pressure sensor; 3. Gas storage cylinder; 4. Plunger pump; 5. First circulating water bath; 6. Base; 7. Semiconductor cooler; 8. Water tank; 9. X-ray generator; 10. Second circulating water bath; 11. Temperature controller; 12. First temperature sensor; 13. X-ray receiver; 14. Second temperature sensor; 15. Sample column; 16. Outer shell. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the use of terms such as "first", "second", etc. to limit the components is only for the convenience of distinguishing the above-mentioned components. Without additional declaration, the above terms have no special meaning and should not be construed as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "setting", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0022] The present invention relates to the technical field of hydrate growth, and particularly to an experimental device and experimental method for hydrate particle growth based on X-ray CT. The purpose is to solve the problem that when the existing experimental device for hydrate particle growth is used for hydrate formation on the surface of water droplets, it is necessary to wait for a long time, which significantly reduces the experimental efficiency and increases the total time cost of the experiment. For this purpose, the experimental device and experimental method for hydrate particle growth based on X-ray CT provided by the present invention include a reaction kettle, an X-ray CT, a temperature control component, and a gas transmission and pressure regulation component. A sample column is detachably installed in the reaction kettle for placing samples. The temperature control component is set to be able to control the temperature in the reaction kettle. The X-ray CT is set to be able to scan the samples placed on the sample column in the reaction kettle. The gas transmission and pressure regulation component is set to be able to transport the gases required for the experiment into the reaction kettle or extract the gases in the reaction kettle for pressure regulation. The temperature control component and the gas transmission and pressure regulation component designed by the present invention cooperate with each other, enabling hydrate crystals to form on the surface of the ice particles formed by freezing. Then, under the set conditions, the ice is melted and the hydrate is decomposed. When it is determined that the hydrate on the surface of the ice particles is completely decomposed and there is residual hydrate that has not been decomposed, the pressure in the reaction kettle is regulated by the gas transmission and pressure regulation component to increase the pressure and reach the experimental pressure to enable the hydrate to grow. During this process, some residual hydrates are retained as seed crystals to induce the growth of hydrates on the surface of water droplets, which can effectively promote the growth of hydrate particles, significantly improve the experimental efficiency, and reduce the total time cost of the experiment.

[0023] Next, with reference to the accompanying drawings, the hydrate particle growth experimental device and experimental method provided by the embodiments of the present invention based on X-ray CT will be described in detail.

[0024] Referring to Figure 1 , the present invention provides a hydrate particle growth experimental device based on X-ray CT, including a reaction kettle, an X-ray CT, a temperature control component, and a gas transmission and pressure regulation component. A sample column is detachably installed in the reaction kettle for placing samples. The temperature control component is configured to be able to control the temperature in the reaction kettle. The X-ray CT is configured to be able to scan the samples placed on the sample column in the reaction kettle to obtain CT scan images. The gas transmission and pressure regulation component is configured to be able to transport the gases required for the experiment into the reaction kettle or extract the gases in the reaction kettle for pressure regulation.

[0025] In this application, the sample is a water droplet, that is, during the experiment, a drop of water is dripped on the top of the sample column.

[0026] Specifically, the X-ray CT includes a mutually cooperating X-ray generator and an X-ray receiver. The X-ray generator is located on one side of the reaction kettle, and the X-ray receiver is located on the other side of the reaction kettle. The central height of the X-ray generator is flush with the top surface of the sample column to ensure that the samples on the sample column can be accurately photographed.

[0027] Specifically, continuing to refer to Figure 1 , the reaction kettle includes a base and a housing. The housing is detachably and fixedly connected to the base. The sample column is detachably and fixedly connected to the base inside the housing. An air inlet groove communicating with the inside of the housing is provided on the base, and the air inlet groove is connected to the gas transmission and pressure regulation component. The housing and the base can be detachably and fixedly connected by screws, and a seal is maintained between the housing and the base. The sample column is designed to be detachable and can be replaced according to the types and sizes of the samples to be measured. Both the housing and the sample column are made of metallic aluminum, which has good thermal conductivity and good X-ray penetrability. The thickness of the housing is as thin as possible to reduce ray attenuation. For a larger magnification and higher resolution, the diameter of the housing is as small as possible and as close as possible to the X-ray generator, which will be adjusted according to different CT devices. Exemplarily, the diameter of the reaction kettle housing at the X-ray scanning position is 18 mm, and the thickness is 1.5 mm, which can ensure a high resolution of the CT image.

[0028] In one embodiment, the gas transmission and pressure regulation component includes a gas storage cylinder, a piston pump, a vacuum pump, and an air inlet pipe. One end of the air inlet pipe communicates with the inside of the reaction kettle, that is, one end of the air inlet pipe is fixed in the air inlet groove to communicate with the air inlet groove. The gas storage cylinder transports the gases required for the experiment into the air inlet pipe through the piston pump to reach the reaction kettle. The vacuum pump is connected to the air inlet pipe for extracting the gases in the reaction kettle. A pressure sensor is installed on the air inlet pipe for detecting the pressure in the reaction kettle.

[0029] Specifically, the air inlet of the vacuum pump is connected to the air inlet pipe, and the vacuum pump can extract the gas in the reactor through the air inlet pipe, thereby regulating the air pressure inside the reactor. The air outlet valve of the plunger pump is connected to the air inlet pipe, and the gas cylinder is arranged on one side of the plunger pump. The air inlet valve of the plunger pump is connected to the gas cylinder. The plunger pump can extract the gas in the gas cylinder and introduce the gas into the reactor through the air inlet pipe. In the present application, the gas stored in the gas cylinder is used for the formation of hydrates in the experiment. For example, the gas can be xenon gas for forming xenon hydrates. Of course, this application does not make any specific restrictions on this. Without deviating from the basic principles of the present invention, it can be selected according to the type of experiment.

[0030] In addition, in the above embodiment, the gas transmission and pressure regulation assembly further includes a first circulating water bath, which is disposed on one side of the plunger pump. A hollow cooling jacket is mounted on the outside of the plunger pump body, and the first circulating water bath is connected to the cooling jacket. The first circulating water bath can flow circulating water into the cooling jacket, thereby absorbing heat from the plunger pump body.

[0031] In one embodiment, continue to refer to Figure 1 The temperature control assembly includes a temperature controller, a semiconductor cooler connected to the temperature controller, a first temperature sensor, and a second temperature sensor. The semiconductor cooler is mounted at the bottom of the base, the first temperature sensor is mounted inside the base to detect the base's temperature, and the second temperature sensor is mounted at the top of the housing to detect the temperature inside the reactor. The cold section of the semiconductor cooler is in contact with the base.

[0032] Specifically, semiconductor cooling is a compact cooling method based on the Peltier effect. When current flows through a thermocouple pair composed of an N-type semiconductor and a P-type semiconductor, heat transfer occurs between the two ends, creating a temperature difference between the hot and cold ends. The temperature controller is a PID controller that controls the power of the semiconductor cooler based on signals from the second and first temperature sensors. In the above embodiment, the temperature control assembly further includes a water tank and a second circulating water bath. The water tank is disposed below the semiconductor cooler, with the hot end surface of the semiconductor cooler in contact with the top surface of the water tank. The second circulating water bath is connected to the water tank and disposed on one side of the water tank.

[0033] During the experiment, the first temperature sensor and the second temperature sensor were both WRNK-191 armored thermocouples, which were used to monitor and feedback the temperature of the reactor. The temperature of the reactor was controlled by a temperature controller with a temperature control accuracy of ±0.1°C.

[0034] During operation, the hot surface of the semiconductor refrigerator is closely attached to the water tank, which is used to absorb the heat generated during the operation of the semiconductor refrigerator. The second circulating water bath can promote the circulation of the water in the water tank, thereby improving the heat absorption effect of the water tank. During the operation of the semiconductor refrigerator, the water bath temperature of the second circulating water bath is adjusted to no higher than 15 °C, so as to ensure that the hot surface temperature of the semiconductor refrigerator always remains within a relatively low temperature range. The cold surface of the semiconductor refrigerator is closely attached to the base of the reaction kettle, and the heat is transferred from the cold surface of the semiconductor refrigerator, the base, the sample column and the outer shell of the reaction kettle, providing a low-temperature environment for the formation of hydrates.

[0035] In this embodiment, the pressure sensor and the X-ray CT are both connected to the computer system, and the computer system is used for operations such as displaying the pressure data collected by the pressure sensor, the CT scan images, and recording the time.

[0036] In another embodiment, the present invention also provides an experimental method using the hydrate particle growth experimental device based on X-ray CT described in any of the above embodiments. The experimental method includes the following steps: Place a sample on the sample column; specifically, disassemble the outer shell from the base, place the sample at the top of the sample column. Exemplarily, the sample is a water droplet, that is, drop a water droplet onto the top of the sample column, and then reinstall the outer shell on the base after placement; After placement, use the temperature control component to adjust the temperature in the reaction kettle to reach the freezing preset temperature. After the sample is completely frozen to form ice particles, use the gas transmission and pressure regulation component to evacuate the reaction kettle, and then stop when the internal pressure reaches the first set pressure by filling the reaction kettle with the gas required for the experiment through the gas transmission and pressure regulation component, for forming hydrates; Exemplarily, the freezing preset temperature is -20 °C; the gas introduced can be, for example, xenon; When it is determined that there is hydrate on the surface of the ice particles formed by the freezing of the sample, use the temperature control component to increase the temperature in the reaction kettle to reach the experimental temperature and maintain it, and then use the gas transmission and pressure regulation component to reduce the pressure in the reaction kettle and reach the second set pressure, and then stop the vacuum pump to decompose the formed hydrates; When it is determined that the hydrate on the surface of the ice particles is completely decomposed and there is undecomposed residual hydrate remaining, use the gas transmission and pressure regulation component to increase the pressure in the reaction kettle to reach the experimental pressure and maintain it, so that the hydrates grow; Control the X-ray CT by the computer system to scan the hydrates in the reaction kettle to obtain CT scan growth images for observing the growth changes of the hydrates. At the same time, start timing when scanning the growth changes of the hydrates, and stop scanning until the scanning time reaches the preset time. The preset time is flexibly set according to the actual situation.

[0037] Specifically, the specific steps for the temperature control component to control the temperature in the reactor are as follows: The base temperature detected by the first temperature sensor and the temperature inside the reactor detected by the second temperature sensor are both transmitted to the temperature controller. The temperature controller controls the power of the semiconductor refrigerator based on these two temperature information to achieve the purpose of temperature regulation. The specific operations of the gas transmission and pressure regulation component for pressure increase and pressure decrease are as follows: The pressure inside the reactor is increased by introducing the gas in the gas storage cylinder into the reactor through a plunger pump, and the pressure inside the reactor is reduced by pumping out the gas inside the reactor through a vacuum pump, thereby achieving the purpose of pressure regulation.

[0038] The steps of "determining that there is hydrate on the surface of the ice particles formed by the freezing of the sample" specifically include: The computer system is used to control the X-ray CT to scan the ice particles in the reactor in real time to obtain the CT scan ice particle image, and the presence of hydrate on the surface of the ice particles is determined according to the change of the obtained CT scan ice particle image; that is, whether the formation of hydrate is observed in the image, and the presence of hydrate on the surface of the ice particles is determined by the image change from the absence to the formation of hydrate. The steps of "determining that the hydrate on the surface of the ice particles is completely decomposed and there is residual hydrate that has not been decomposed therein" specifically include: The computer system is used to control the X-ray CT to scan the hydrate in the reactor in real time to obtain the CT scan hydrate decomposition image; The complete decomposition of the hydrate on the surface of the ice particles and the presence of residual hydrate that has not been decomposed therein are determined according to the change of the CT scan hydrate decomposition image obtained in real time.

[0039] Taking the gas stored in the gas storage cylinder as xenon as an example for illustration. Introducing xenon into the reactor can form xenon hydrate. Since the density of xenon hydrate is greater than that of water, during the decomposition process of the hydrate, a part of the residual xenon hydrate crystals will sink to the bottom of the water droplets: The decomposition process of the hydrate can be observed in real time through the CT scan image. When it is determined that the hydrate on the surface of the ice particles has been completely decomposed and there is still a small amount of residual hydrate at the bottom after the ice melts, xenon is filled into the reaction vessel to the experimental pressure to allow the hydrate to grow. During the growth process of the hydrate, a series of CT scans of the experimental area are performed using X-ray CT to observe the growth of the hydrate.

[0040] 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 them; Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; And these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An experimental device for hydrate particle growth based on X-ray CT, characterized in that It includes a reaction kettle, an X-ray CT, a temperature control component and a gas transmission and pressure regulation component. A sample column is detachably installed in the reaction kettle for placing samples. The temperature control component is configured to be able to control the temperature inside the reaction kettle. The X-ray CT is configured to be able to scan the sample placed on the sample column inside the reaction kettle to obtain a CT scan image. The gas transmission and pressure regulation component is configured to be able to transport the gas required for the experiment into the reaction kettle or extract the gas inside the reaction kettle for pressure regulation.

2. The experimental device for hydrate particle growth based on X-ray CT according to claim 1, wherein The gas transmission and pressure regulation component includes a gas storage cylinder, a plunger pump, a vacuum pump and an intake pipeline. One end of the intake pipeline is communicated with the inside of the reaction kettle. The gas storage cylinder transports the gas required for the experiment into the intake pipeline through the plunger pump to reach inside the reaction kettle. The vacuum pump is connected to the intake pipeline for extracting the gas inside the reaction kettle. A pressure sensor is installed on the intake pipeline.

3. The experimental device for hydrate particle growth based on X-ray CT according to claim 2, characterized in that, The gas transmission and pressure regulation component further includes a first circulating water bath. A cooling jacket is installed outside the pump body of the plunger pump. The first circulating water bath is communicated with the cooling jacket.

4. The experimental device for hydrate particle growth based on X-ray CT according to claim 1, wherein, The reaction kettle includes a base and a housing. The housing is detachably and fixedly connected to the base. The sample column is detachably and fixedly connected to the base inside the housing.

5. The experimental device for hydrate particle growth based on X-ray CT according to claim 4, wherein The temperature control component includes a temperature controller, a semiconductor cooler connected to the temperature controller, a first temperature sensor and a second temperature sensor. The semiconductor cooler is installed at the bottom of the base. The first temperature sensor is installed inside the base. The second temperature sensor is installed at the top end of the housing.

6. The experimental device for hydrate particle growth based on X-ray CT according to claim 5, characterized in that, The temperature control component further includes a water tank and a second circulating water bath. The water tank is arranged below the semiconductor cooler, and the hot end face of the semiconductor cooler is attached to the top face of the water tank. The second circulating water bath is communicated with the water tank.

7. The experimental device for hydrate particle growth based on X-ray CT according to claim 4, characterized in that An intake groove communicated with the inside of the housing is provided on the base. The intake groove is connected to the gas transmission and pressure regulation component.

8. An experimental method using the X-ray CT-based hydrate particle growth experimental device described in any one of claims 1-7, characterized in that, The experimental method includes the following steps: Place a sample on the sample column; After the placement is completed, use the temperature control component to control the temperature inside the reaction kettle to reach the preset freezing temperature. After the sample is completely frozen to form ice particles, use the gas transmission and pressure regulation component to evacuate the reaction kettle, and then stop when the pressure inside the reaction kettle reaches the first set pressure by filling the gas required for the experiment through the gas transmission and pressure regulation component; When it is determined that there is hydrate on the surface of the ice particles formed by the freezing of the sample, use the temperature control component to control the temperature inside the reaction kettle to rise and reach the experimental temperature, and then use the gas transmission and pressure regulation component to control the pressure inside the reaction kettle to decrease and reach the second set pressure to decompose the formed hydrate; When it is determined that the hydrate on the surface of the ice particles is completely decomposed and there is undecomposed residual hydrate remaining, use the gas transmission and pressure regulation component to control the pressure inside the reaction kettle to rise to reach the experimental pressure and maintain it to enable the growth of the hydrate; Control the X-ray CT to scan the hydrate in the reactor to obtain a CT scan growth image for observing the growth changes of the hydrate. At the same time, start timing when scanning the growth changes of the hydrate, and stop scanning until the scanning time reaches the preset time.

9. The experimental method using the experimental device for hydrate particle growth based on X-ray CT according to claim 8, characterized in that, The step of "determining that there is hydrate on the surface of the ice particles formed by the freezing of the sample" specifically includes: Real-time control the X-ray CT to scan the ice particles in the reactor to obtain a CT scan ice particle image; Determine that there is hydrate on the surface of the ice particles according to the changes in the obtained CT scan ice particle image.

10. The experimental method using the experimental device for hydrate particle growth based on X-ray CT according to claim 8, characterized in that, The step of "determining that the hydrate on the surface of the ice particles is completely decomposed and there is undecomposed residual hydrate remaining therein" specifically includes: Real-time control the X-ray CT to scan the hydrate in the reactor to obtain a CT scan hydrate decomposition image; Determine that the hydrate on the surface of the ice particles is completely decomposed and there is undecomposed residual hydrate remaining therein according to the changes in the CT scan hydrate decomposition image obtained in real time.

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