A device for simulating the sedimentation characteristics of hydrates under flow

Abstract

The present invention discloses a device for simulating the deposition characteristics of hydrates under flow, comprising a hydrate generation system, a pipe flow circulation system, and an in-pipe monitoring system. The hydrate generation system is used to generate hydrates and transport the hydrates to the pipe flow circulation system, the pipe flow circulation system is used to circulate the hydrates, and the in-pipe monitoring system is installed within the pipe flow circulation system and observes and records the deposition characteristics of the hydrate slurry under flow along the direction of the hydrate flow. The present invention can provide more accurate data records of the deposition rate and thickness of hydrates around the pipe wall at different inclination angles, providing an observation data basis for quantitative observation of the deposition rate. At the same time, the present invention can realize the observation of the deposition characteristics of the hydrate slurry under the circulation flow. The entire device is simple, low-cost, and easy to promote and use.

Description

Technical Field

[0001] The invention relates to the technical field of hydrate flow experimental simulation devices, in particular to a simulation device for sedimentation characteristics of hydrates under flow. Background Art

[0002] Natural gas hydrates have attracted widespread attention due to their widespread distribution, large reserves, and the pollution-free combustion of their decomposed gases. During wellbore extraction or pipeline transportation, natural gas hydrates may be regenerated due to changes in temperature and pressure. This regenerated natural gas hydrate forms a hydrate slurry, which may adhere to the pipe wall during flow and cause hydrate blockage. Research on the flow characteristics of natural gas hydrate slurry and the growth patterns of natural gas hydrate deposition on pipe walls provides a technical means for accurately simulating the flow of natural gas hydrate slurries in wellbores or pipelines. For example, Chinese invention patent application number 201910833073.1, "Submarine Mixed Pipeline Wax Deposition Simulation Experimental Device and Its Operation," describes a pipeline and wax deposition device, including an oil storage tank deposition experimental system. The outlet of the oil storage tank is connected to the inlet of the wax deposition experimental system via a loop pipeline via a mixed transportation pump. The outlet of the wax deposition experimental system is connected to the return port of the oil storage tank via a loop pipeline via a check valve assembly. The loop pipeline is fixedly equipped with a pipeline temperature control device. The device can conduct multiple sets of experiments with different control variables simultaneously, and can effectively study the influence mechanism of thermodynamic and kinetic factors on the wax deposition law of submarine mixed pipelines.

[0003] There are some studies on the secondary generation and slurry flow simulation of natural gas hydrates in natural gas hydrate pipelines and oil and gas mixed transportation. However, there are several problems in the current research: (1) The device for simulating the deposition characteristics of natural gas hydrates mainly uses a transparent tube to observe the deposition characteristics inside the tube from the outside of the transparent tube. However, since the hydrate deposits adhere to the tube wall, it blocks the view of the deposition characteristics inside the tube, making it difficult to observe the hydrate deposition rate and other hydrate deposition characteristics, including the hydrate deposition rate and the circumferential distribution characteristics of the hydrate deposition. (2) It is difficult to observe the slurry flow characteristics of natural gas hydrates inside the tube flow at different inclination angles. (3) It is difficult to achieve quantitative observation of the deposition rate of natural gas hydrates, especially the deposition rate and thickness of the natural gas hydrate tube wall, and the deposition rate of the tube wall at different inclination angles.

[0004] During natural gas hydrate extraction, changes in temperature and pressure conditions within pipelines can lead to secondary formation of natural gas hydrates. This can result in hydrate slurry flow during pipeline transportation. However, the flow patterns of the slurry flow within the pipeline and the secondary deposition patterns of hydrates on the pipe walls are unclear, making it difficult to predict the safe flow of natural gas hydrates within the pipeline. To address this, the present invention provides a natural gas hydrate slurry flow simulation device that enables observation of the flow patterns of the natural gas hydrate slurry flow within the pipeline and the distribution of hydrate deposition thickness around the pipe wall. This device can then provide information on the deposition rate and patterns of natural gas hydrates on the pipe wall at different pipeline inclination angles. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the purpose of the present invention is to provide a device for simulating the sedimentation characteristics of hydrates under flow, which can solve the problem of observing the flow of natural gas hydrate slurry inside a natural gas hydrate pipeline.

[0006] The technical solution to achieve the purpose of the present invention is: a device for simulating the sedimentation characteristics of hydrates under flow, comprising a hydrate generation system, a pipe flow circulation system and an in-pipe monitoring system.

[0007] The hydrate generation system is used to generate hydrates and transport hydrates to the pipe flow circulation system. The pipe flow circulation system is used for hydrate formation circulation.

[0008] The in-pipe monitoring system is installed inside the pipe flow circulation system and observes and records the deposition characteristics of the hydrate slurry flow along the hydrate flow direction. The deposition characteristics include the hydrate slurry flow characteristics and the thickness and distribution characteristics of the secondary hydrate formation around the pipe wall.

[0009] Furthermore, the hydrate generation system includes a first gas cylinder, a valve, a gas flowmeter, a gas booster pump and a magnetic stirrer. The first gas cylinder is connected to the magnetic stirrer through a pipeline. The valve and the gas booster pump are respectively provided on the pipeline connecting the first gas cylinder and the magnetic stirrer. The valve and the gas booster pump are arranged in parallel, so that the first gas cylinder directly supplies gas to the magnetic stirrer through the sub-pipeline where the valve is located, or supplies gas to the magnetic stirrer after being pressurized by the gas booster pump. The gas flowmeter is installed on the pipeline between the first gas cylinder and the parallel valve and gas booster pump. The magnetic stirrer is used to stir the received gas and water to generate natural gas hydrate. The first gas cylinder stores the gas required to form natural gas hydrate.

[0010] Furthermore, the hydrate generation system also includes a temperature sensor and a pressure sensor. The temperature sensor is used to measure the temperature inside the magnetic stirrer, and the pressure sensor is used to measure the pressure inside the magnetic stirrer. The temperature sensor and the pressure sensor are located inside the magnetic stirrer.

[0011] Furthermore, the temperature sensor and the pressure sensor are both connected to the control terminal to upload the measured data to the control terminal.

[0012] Furthermore, the pipe flow circulation system includes a water injection pump, a magnetic circulation pump, a liquid flow meter, an online particle size analyzer, a gas-liquid separator, a first observation pipe assembly and a second observation pipe assembly. The first observation pipe assembly and the second observation pipe assembly both include a horizontal pipe, a water bath, a connecting hose, a three-way connecting pipe and an inclined pipe. One end of the horizontal pipe is connected to the first connecting end of the three-way connecting pipe through the connecting hose, the second connecting end of the three-way connecting pipe is connected to the inclined pipe, and the third connecting end of the three-way connecting pipe is connected to the transparent observation pipe of the loop structure. At least a portion of the transparent observation pipe is located in the inclined pipe and extends along the axial direction of the inclined pipe. The transparent observation pipe located in the inclined pipe is recorded as a transverse transparent observation pipe.

[0013] One end of the horizontal pipe of the first observation pipeline assembly is connected to the output end of the gas-liquid separator, and a valve is installed on the connecting pipe between the horizontal pipe and the gas-liquid separator. One end of the horizontal pipe of the second observation pipeline assembly is connected to one end of the online particle size analyzer, and a valve is installed on the connecting pipe between the horizontal pipe and the online particle size analyzer. The inclined pipe of the first observation pipeline assembly is connected to the inclined pipe of the second observation assembly, thereby connecting the first observation pipeline assembly and the second observation pipeline assembly together.

[0014] The online particle size analyzer is connected to one end of the liquid flow meter, the other end of the liquid flow meter is connected to the output end of the water injection pump, and the common connection end of the liquid flow meter and the water injection pump is connected to the magnetic stirrer through a valve, and the input end of the gas-liquid separator is connected to the common connection end of the liquid flow meter and the water injection pump through a magnetic circulation pump, so that the gas-liquid separator is also connected to the magnetic stirrer.

[0015] Furthermore, the inclined tube of the first observation pipeline assembly and the inclined tube of the second observation assembly are connected via a U-shaped tube.

[0016] Furthermore, a valve is connected in parallel to the magnetic circulation pump, so that the input end of the gas-liquid separator can be connected to the magnetic stirrer through the magnetic circulation pump or directly through the pipeline where the valve is located.

[0017] Furthermore, the other output end of the gas-liquid separator is also connected to the second gas cylinder, and a plurality of valves are installed on the connecting pipe between the gas-liquid separator and the second gas cylinder.

[0018] Furthermore, the pipeline connecting the liquid flow meter and the water injection pump is also connected to a third gas cylinder, so that the third gas cylinder is also connected to the magnetic stirrer.

[0019] Furthermore, the in-pipe monitoring system includes an ice scraper, a rotatable camera, and an integrated control and data reading component. The ice scraper and the rotatable camera are both mounted on the transverse transparent observation tube of the transparent observation tube, and both the ice scraper and the rotatable camera can slide along the axial direction of the transverse transparent observation tube, so that the ice scraper and the rotatable camera can slide along the inner wall of the inclined tube. The ice scraper is used to scrape off hydrates or other sediments attached to the inner wall of the inclined tube. The rotatable camera can also rotate around the circumference of the transverse observation tube, so that the rotatable camera can shoot different positions of the inner wall of the inclined tube, realizing 360° shooting of different positions inside the inclined tube.

[0020] The integrated control and data reading component is installed on the part of the transparent observation tube located outside the tilting tube. The integrated control and data reading component is connected to the rotatable camera. The integrated control and data reading component is used to open and close the rotatable camera and obtain the video records taken by the rotatable camera, and drive the rotatable camera to slide by turning on the driving device installed on the rotatable camera.

[0021] The present invention has the following beneficial effects: By observing the deposition characteristics of hydrate slurry under flow within an inclined tube, it can more comprehensively record its deposition patterns, providing observational data for quantitative observation of deposition rates. In particular, it can provide more accurate data records of the deposition rate and thickness of hydrates on the tube wall at different inclination angles, laying the foundation for quantitative observation. Furthermore, the present invention can observe the deposition characteristics of hydrate slurry under circulating flow, and the entire device is simple, low-cost, and easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 Schematic diagram for observing the sedimentation characteristics of different inclination angles and sediment diameters in the pipe wall;

[0024] In the figure, 1-first gas cylinder, 2-gas flow meter, 3-valve, 4-gas booster pump, 5-control terminal, 6-temperature sensor, 7-pressure sensor, 8-magnetic stirrer, 9-water injection pump, 10-magnetic circulation pump, 11-liquid flow meter, 12-gas-liquid separator, 13-online particle size analyzer, 14-horizontal pipe, 15-water bath, 16-connecting hose, 17-three-way connecting pipe, 18-ice scraper, 19-rotatable camera, 20-control and data reading integrated component, 21-transparent observation tube, 22-tilt tube. DETAILED DESCRIPTION

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0026] like Figure 1 and Figure 2 As shown, a simulation device for the sedimentation characteristics of hydrates under flow includes a hydrate generation system, a pipe flow circulation system and an in-pipe monitoring system.

[0027] The hydrate formation system includes a first gas cylinder 1, a valve 3, a gas flowmeter 2, a gas booster pump 4 and a magnetic stirrer 8. The first gas cylinder 1 is connected to the magnetic stirrer 8 through a pipeline. The valve 3 and the gas booster pump 4 are respectively provided on the pipeline connecting the first gas cylinder 1 and the magnetic stirrer 8. The valve 3 and the gas booster pump 4 are arranged in parallel, so that the first gas cylinder 1 can directly supply gas to the magnetic stirrer 8 through the sub-pipeline where the valve 3 is located, or can supply gas to the magnetic stirrer 8 after being pressurized by the gas booster pump 4. The gas flowmeter 2 is installed on the pipeline between the first gas cylinder 1 and the parallel valve 3 and gas booster pump 4, that is, the gas flowmeter 2 is located near the output end of the first gas cylinder 1. The gas flowmeter 2 is used to measure the gas volume output from the first gas cylinder 1.

[0028] The magnetic stirrer 8 is used to stir the received gas to form natural gas hydrates. The first gas cylinder 1 primarily stores one or a combination of gases such as methane, ethane, and carbon dioxide. These gases can form hydrates when combined with water under specific conditions. The conditions for hydrate formation are known in the art. Therefore, hydrate formation can be achieved by simply setting the corresponding conditions and inputting the gases and water required for hydrate synthesis. This part is known in the art and will not be described in detail here.

[0029] In an optional embodiment, the magnetic stirrer 8 further includes a temperature sensor 6 and a pressure sensor 7. The temperature sensor 6 is used to measure the temperature within the magnetic stirrer 8, and the pressure sensor 7 is used to measure the pressure within the magnetic stirrer 8. The temperature sensor 6 and the pressure sensor 7 are located inside the magnetic stirrer 8. Both the temperature sensor 6 and the pressure sensor 7 are connected to the control terminal 5 to transmit the measured data to the control terminal 5, which can be a general-purpose computer (i.e., a desktop computer). In the figure, the temperature sensor 6 and the pressure sensor 7 are shown outside the magnetic stirrer 8 to make their presence more intuitive and clear, and do not necessarily mean that they are installed outside the magnetic stirrer 8.

[0030] The pipe flow circulation system includes a water injection pump 9, a magnetic circulation pump 10, a liquid flowmeter 11, an online particle size analyzer 13, a gas-liquid separator 12, a first observation pipe assembly, and a second observation pipe assembly. Each of the first and second observation pipe assemblies includes a horizontal pipe 14, a water bath 15, a connecting hose 16, a three-way connecting pipe 17, and an inclined pipe 22. One end of the horizontal pipe 14 is connected to the first connecting end of the three-way connecting pipe 17 via the connecting hose 16. The second connecting end of the three-way connecting pipe 17 is connected to the inclined pipe 22. The third connecting end of the three-way connecting pipe 17 is connected to a transparent observation pipe 21 in a loop structure. At least a portion of the transparent observation pipe 21 is located within the inclined pipe 22 and extends axially along the inclined pipe 22. The portion of the transparent observation pipe 21 located within the inclined pipe 22 is referred to as the transverse transparent observation pipe 21. One end of the horizontal pipe 14 of the first observation pipe assembly is connected to the output end of the gas-liquid separator 12, and a valve 3 is installed on the connecting pipe between the horizontal pipe 14 and the gas-liquid separator 12. One end of the horizontal pipe 14 of the second observation pipeline assembly is connected to one end of the online particle size analyzer 13 , and a valve 3 is installed on the communication pipeline between the horizontal pipe 14 and the online particle size analyzer 13 .

[0031] The inclined tube 22 of the first observation pipe assembly and the inclined tube 22 of the second observation pipe assembly are connected through a U-shaped tube, thereby connecting the first observation pipe assembly and the second observation pipe assembly together.

[0032] The online particle size analyzer 13 is connected to one end of the liquid flow meter 11, the other end of the liquid flow meter 11 is connected to the output end of the water injection pump 9, and the common connection end of the liquid flow meter 11 and the water injection pump 9 is connected to the magnetic stirrer 8 via the valve 3. The input end of the gas-liquid separator 12 is connected to the common connection end of the liquid flow meter 11 and the water injection pump 9 via the magnetic circulation pump 10, thereby connecting the gas-liquid separator 12 to the magnetic stirrer 8.

[0033] A valve 3 is connected in parallel to the magnetic circulation pump 10 so that the input end of the gas-liquid separator 12 can be connected to the magnetic stirrer 8 through the magnetic circulation pump 10 or directly through the pipeline where the valve 3 is located.

[0034] In an optional embodiment, the other output end of the gas-liquid separator 12 is also connected to a second gas cylinder (not shown in the figure), and a plurality of valves 3 are installed on the connecting pipe between the gas-liquid separator 12 and the second gas cylinder.

[0035] In another optional embodiment, the pipeline connecting the liquid flow meter 11 and the water injection pump 9 is further connected to a third gas cylinder (not shown in the figure), so that the third gas cylinder is also connected to the magnetic stirrer 8.

[0036] The in-pipe monitoring system includes an ice scraper 18, a rotatable camera 19, and an integrated control and data reading assembly 20. Both the ice scraper 18 and the rotatable camera 19 are mounted on the transverse transparent observation tube 21 of the transparent observation tube 21. Both the ice scraper 18 and the rotatable camera 19 can slide axially along the transverse transparent observation tube 21, thereby sliding along the inner wall of the inclined tube 22. The ice scraper 18 scrapes away hydrates or other sediments adhering to the inner wall of the inclined tube 22. The rotatable camera can also rotate around the circumference of the transverse observation tube, allowing the rotatable camera 19 to capture images of different locations on the inner wall of the inclined tube 22, achieving 360-degree coverage of different locations within the inclined tube 22. This allows for better recording and observation of the deposition process of hydrates within the inclined tube 22 under flow. Based on the recorded and captured deposition process, the deposition effects can be better analyzed and summarized, completing a simulation experiment on the deposition characteristics of hydrates under flow.

[0037] The integrated control and data reading assembly 20 is mounted on the portion of the transparent observation tube 21 located outside the inclined tube 22. The integrated control and data reading assembly 20 is connected to the rotatable camera 19 and is used to open and close the rotatable camera 19 and obtain the video recordings taken by the rotatable camera 19. The video recordings are records of the hydrate flow state and the deposition process within the inclined tube 22, thereby obtaining the deposition characteristics. The rotatable camera 19 is then turned on and the drive device mounted on the rotatable camera 19 is activated to drive the rotatable camera 19 to slide.

[0038] The ice scrapers 18 can be connected to each other via thin ropes, so that the ice scrapers 18 can be pulled by the thin ropes to slide along the transverse transparent observation tube 21. Alternatively, a driving device, such as a motor, can be installed on the ice scraper 18, and the driving device can be turned on and off by a remote control, thereby controllably driving the ice scraper 18 to slide along the transverse transparent observation tube 21.

[0039] In actual use, the device can be operated as follows:

[0040] a. According to the simulated working conditions, adjust the tilt angle of the inclined tube 22 and set the temperature of the water bath 15;

[0041] b. Water and natural gas are injected into the magnetic stirrer 8 via the water injection pump 9 and the first gas cylinder 1. The magnetic stirrer 8 stirs the water and natural gas, thereby generating hydrates. The generated hydrates are then fed into the first observation pipeline assembly via the magnetic circulation pump 10. The hydrates flow within the inclined tube 22 of the first observation pipeline assembly, then through the U-shaped tube into the second observation pipeline assembly, and then again through the magnetic circulation pump 10 into the first observation pipeline assembly, thereby achieving a reciprocating flow of the hydrate slurry. A rotatable camera 19 is used to record the flow of the hydrate slurry and the deposition of hydrates on the inner wall of the inclined tube 22 from different angles.

[0042] c. By monitoring the change in hydrate deposition thickness on the inner wall of the inclined tube 22 over time, the secondary deposition rate and distribution pattern of hydrate on the inner wall of the inclined tube 22 at different inclination angles were calculated, completing the simulation of the deposition characteristics of hydrate under flow.

[0043] refer to Figure 2 When using this device in practice, you can operate it according to the following steps:

[0044] Step 1, generating a hydrate product through a hydrate generation system;

[0045] Step 2: Set the temperature and pressure conditions of the observation pipe section, set the inclination angle of the inclined pipe section, and start the pipe flow circulation system;

[0046] Step 3: Use the in-pipe monitoring system to observe the hydrate slurry flow characteristics of the observation pipe section in real time. During the observation process, use an ice scraper to clean the outer wall of the observation inner pipe to ensure the line of sight of the observation system;

[0047] Step 4: Calculate the sediment deposition rate in the tube at this inclination angle.

[0048] When the inclined tube has an inclination angle of β, the inner wall of the tube Angle (with 12 o'clock as the starting point, the angle with 12 o'clock is ) deposition rate ,in, . Figure 2 The left part represents L1(α,β), the middle part represents Li(α,β), and the right part represents LN(α,β).

[0049] Step 5: Analyze the deposition rate characteristics and deposition distribution characteristics around the inside of the observation tube at different tilt angles.

[0050] By observing the deposition characteristics of hydrate slurry under flow within the inclined tube 22, the present invention can more comprehensively record its deposition patterns, providing observational data for quantitative observation of deposition rates. In particular, it can provide more accurate data records of the deposition rate and thickness of hydrates on the tube wall at different inclination angles, laying the foundation for quantitative observation. Furthermore, the present invention can observe the deposition characteristics of hydrate slurry under circulating flow, and the entire device is simple, low-cost, and easy to promote and use.

[0051] The embodiment disclosed in this specification is merely an illustration of one aspect of the present invention. The scope of protection of the present invention is not limited to this embodiment. Any other functionally equivalent embodiments fall within the scope of protection of the present invention. Those skilled in the art can make various other corresponding changes and modifications based on the technical solutions and concepts described above, and all such changes and modifications should fall within the scope of protection of the claims of the present invention.

Claims

1. A device for simulating the sedimentation characteristics of hydrates under flow, characterized in that: Including hydrate generation system, pipe flow circulation system and pipe monitoring system, The hydrate generation system is used to generate hydrates and transport hydrates to the pipe flow circulation system. The pipe flow circulation system is used for hydrate formation circulation. The in-pipe monitoring system is installed inside the pipe circulation system and observes and records the deposition characteristics of the hydrate slurry flow along the hydrate flow direction. The deposition characteristics include the hydrate slurry flow characteristics and the thickness and distribution characteristics of the secondary hydrate formation around the pipe wall. The pipe flow circulation system includes a water injection pump, a magnetic circulation pump, a liquid flow meter, an online particle size analyzer, a gas-liquid separator, a first observation pipe assembly and a second observation pipe assembly. The first observation pipe assembly and the second observation pipe assembly both include a horizontal pipe, a water bath, a connecting hose, a three-way connecting pipe and an inclined pipe. One end of the horizontal pipe is connected to the first connecting end of the three-way connecting pipe through the connecting hose, the second connecting end of the three-way connecting pipe is connected to the inclined pipe, and the third connecting end of the three-way connecting pipe is connected to the transparent observation pipe of the loop structure. At least a part of the transparent observation pipe is located in the inclined pipe and extends along the axial direction of the inclined pipe. The transparent observation pipe located in the inclined pipe is recorded as a transverse transparent observation pipe. One end of the horizontal pipe of the first observation pipeline assembly is connected to the output end of the gas-liquid separator, and a valve is installed on the connecting pipe between the horizontal pipe and the gas-liquid separator. One end of the horizontal pipe of the second observation pipeline assembly is connected to one end of the online particle size analyzer, and a valve is installed on the connecting pipe between the horizontal pipe and the online particle size analyzer. The inclined pipe of the first observation pipeline assembly is connected to the inclined pipe of the second observation assembly, thereby connecting the first observation pipeline assembly and the second observation pipeline assembly together. The online particle size analyzer is connected to one end of the liquid flow meter, the other end of the liquid flow meter is connected to the output end of the water injection pump, and the common connection end of the liquid flow meter and the water injection pump is connected to the magnetic stirrer through a valve, and the input end of the gas-liquid separator is connected to the common connection end of the liquid flow meter and the water injection pump through a magnetic circulation pump, so that the gas-liquid separator is also connected to the magnetic stirrer. The in-pipe monitoring system includes an ice scraper, a rotatable camera, and an integrated control and data reading component. The ice scraper and the rotatable camera are both mounted on the transverse transparent observation tube of the transparent observation tube, and both the ice scraper and the rotatable camera can slide along the axial direction of the transverse transparent observation tube, so that the ice scraper and the rotatable camera can slide along the inner wall of the inclined tube. The ice scraper is used to scrape off hydrates or other sediments attached to the inner wall of the inclined tube. The rotatable camera can also rotate around the circumference of the transverse observation tube, so that the rotatable camera can shoot different positions of the inner wall of the inclined tube, realizing 360° shooting of different positions inside the inclined tube. The integrated control and data reading component is installed on the part of the transparent observation tube located outside the tilting tube. The integrated control and data reading component is connected to the rotatable camera. The integrated control and data reading component is used to open and close the rotatable camera and obtain the video records taken by the rotatable camera, and drive the rotatable camera to slide by turning on the driving device installed on the rotatable camera.

2. The device for simulating the sedimentation characteristics of hydrates under flow according to claim 1, characterized in that: The hydrate generation system includes a first gas cylinder, a valve, a gas flowmeter, a gas booster pump and a magnetic stirrer. The first gas cylinder is connected to the magnetic stirrer through a pipeline. The valve and the gas booster pump are respectively provided on the pipeline connecting the first gas cylinder and the magnetic stirrer. The valve and the gas booster pump are arranged in parallel, so that the first gas cylinder directly supplies gas to the magnetic stirrer through the sub-pipeline where the valve is located, or supplies gas to the magnetic stirrer after being pressurized by the gas booster pump. The gas flowmeter is installed on the pipeline between the first gas cylinder and the parallel valve and gas booster pump. The magnetic stirrer is used to stir the received gas and water to generate natural gas hydrate. The first gas cylinder stores the gas required to form natural gas hydrate.

3. The device for simulating the sedimentation characteristics of hydrates under flow according to claim 2, characterized in that: The hydrate generation system further includes a temperature sensor and a pressure sensor. The temperature sensor is used to measure the temperature inside the magnetic stirrer, and the pressure sensor is used to measure the pressure inside the magnetic stirrer. The temperature sensor and the pressure sensor are located inside the magnetic stirrer.

4. The device for simulating the sedimentation characteristics of hydrates under flow according to claim 3, characterized in that: The temperature sensor and the pressure sensor are both connected to the control terminal to upload the measured data to the control terminal.

5. The device for simulating the sedimentation characteristics of hydrates under flow according to claim 1, characterized in that: The inclined tube of the first observation pipeline assembly and the inclined tube of the second observation assembly are connected through a U-shaped tube.

6. The device for simulating the sedimentation characteristics of hydrates under flow according to claim 1, characterized in that: A valve is connected in parallel to the magnetic circulation pump, so that the input end of the gas-liquid separator can be connected to the magnetic stirrer through the magnetic circulation pump or directly through the pipeline where the valve is located.

7. The device for simulating the sedimentation characteristics of hydrates under flow according to claim 1, characterized in that: The other output end of the gas-liquid separator is also connected to the second gas cylinder, and a plurality of valves are installed on the communication pipeline between the gas-liquid separator and the second gas cylinder.

8. The device for simulating the sedimentation characteristics of hydrates under flow according to claim 1, characterized in that: The pipeline connecting the liquid flow meter and the water injection pump is also connected to a third gas cylinder, so that the third gas cylinder is also connected to the magnetic stirrer.

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