Carbon dioxide sequestration testing device and method based on porous medium

Abstract

The invention discloses a carbon dioxide sealing testing device and method based on a porous medium, and belongs to the technical field of carbon dioxide sealing. The carbon dioxide storage testing device comprises a testing cavity, an adjusting mechanism, a sample storage mechanism, a fluid injection and collection structure and a gas supply mechanism, according to the invention, the injected underground water fluid is simulated through each structure, the gas pressure and temperature are controlled, and various dynamic processes of carbon dioxide in a porous medium can be systematically researched; through mutual cooperation of structures such as an inner frame and a sample box of the sample storage mechanism, sample placement is realized, so that carbon dioxide is better in contact reaction with a porous medium in the sample box; the problems of placement and adjustment of a sample storage mechanism and incapability of simulating various dynamic processes of carbon dioxide in a porous medium are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide sequestration, and specifically to a carbon dioxide sequestration test device and method based on porous media. Background Technique

[0002] Global warming has made carbon dioxide emission reduction and sequestration a focus. As an important carrier for geological sequestration of carbon dioxide, the complex pore structure, permeability, mineral composition and other characteristics of porous media play a decisive role in the sequestration effect of carbon dioxide.

[0003] However, there is currently a lack of a highly accurate and comprehensive test device and method, which cannot fully simulate the actual geological condition factors and cannot systematically study the dynamic processes of carbon dioxide migration, adsorption, dissolution and chemical reactions with the medium in porous media.

[0004] The existing patent technology CN116165203A discloses an experimental simulation device for sequestering carbon dioxide in a methane hydrate reservoir; it is a vertical structure mainly constructed around a high-pressure reactor (including an overlying water layer reactor section, a hydrate layer reactor section and a lower sediment layer reactor section), and each reactor section is connected in sequence. Various sensors and other components are installed through specific holes. Structurally, it focuses on simulating the different stratifications of the deep-sea shallow carbon sequestration formation structure. When this experimental simulation device is specifically used, it cannot achieve the rapid placement and adjustment of the sample storage component, and cannot systematically simulate various dynamic processes of carbon dioxide in porous media, so its practicability cannot be satisfied. Summary of the Invention

[0005] The purpose of the present invention is to provide a carbon dioxide sequestration test device and method based on porous media. To achieve the above purpose, the present invention provides the following technical solutions: A carbon dioxide sequestration test device based on porous media, comprising a test cavity, an adjustment mechanism, a sample storage mechanism, a fluid injection and collection structure, and a gas supply mechanism; one side of the test cavity is connected with a first end cover, the other side of the test cavity is connected with a second end cover, and several groups of detection mechanisms are installed on the inner wall of the test cavity; The adjustment mechanism includes an adjustment rod, the adjustment rod passes through the first end cover and is rotatably connected to the first end cover. A number of support rods are evenly installed circumferentially at one end of the adjustment rod inside the first end cover. One end of each support rod close to the inner wall of the test cavity is installed with a spring, and one end of the spring away from the support rod is connected with a bolt; The sample storage mechanism includes an inner frame rotatably installed inside the test cavity. A plurality of sample boxes are sequentially slidably installed inside the inner frame. One side of the inner frame is provided with insertion holes. The number of insertion holes is the same as that of the bolts. The insertion holes and the bolts are cooperatively connected to fix the inner frame. A number of through holes are evenly distributed on the inner frame and the sample boxes. Bearings are installed at both ends inside the test cavity, and the bearings are sleeved around the outer periphery of the inner frame. The first end cover and the second end cover are connected by a fluid injection and collection structure. The gas supply mechanism includes a gas transmission pipe connected to the second end cover. A gas analyzer is installed on the gas transmission pipe. A pressure regulating valve is connected to the outer periphery of the gas transmission pipe on one side of the gas analyzer. The end of the gas transmission pipe is connected to a gas storage tank.

[0006] Further, a drain valve is installed at the bottom of the first end cover. The drain valve and the second end cover are connected by a fluid injection and collection structure.

[0007] Further, the fluid injection and collection structure includes a return pipe connected to the drain valve. A water tank is connected to one side of the return pipe. A water inlet pipe is installed on the water tank.

[0008] Further, the fluid injection and collection structure further includes a flow meter connected to the water tank. A water pump is connected to one side of the flow meter. A water transmission pipe is connected between the water pump and the second end cover.

[0009] Further, the detection mechanism includes a temperature detector, a pressure detector, and a gas detector. A plurality of temperature detectors, pressure detectors, and gas detectors are evenly distributed along the axis direction of the test cavity. Heating plates are evenly arranged and installed inside the test cavity.

[0010] Further, slide rails are evenly distributed along the axial direction of the inner frame on the inner wall of the inner frame. Grooves are formed on the outer periphery of the sample box. The slide rails and the grooves are slidably connected in cooperation.

[0011] Further, the gas supply mechanism further includes a pressure gauge installed on the top of the gas storage tank. A number of sampling windows are installed on the top of the gas storage tank. Sealing structures are installed on the sampling windows.

[0012] Further, an adjustment handle is installed at one end of the adjustment rod located outside the first end cover.

[0013] Further, flanges are installed on the outer peripheries of the test cavity, the first end cover, and the second end cover. Adjacent flanges are connected by bolts.

[0014] A carbon dioxide sequestration test method based on a porous medium uses the described carbon dioxide sequestration test device based on a porous medium and includes the following steps: S1. Place the porous medium to be tested in the sample box, slide the sample box in the inner frame to the corresponding position, and then rotate the inner frame. Install the inner frame inside the test cavity through the bearings at both ends. S2. Connect and seal the test cavity, the first end cap and the second end cap. Rotate the adjusting rod of the adjusting mechanism to drive the bolt to move by the support rod. Through the expansion and contraction of the spring, insert the bolt into the jack opened on one side of the inner frame to fix the inner frame. S3. Inject fluid into the test cavity through the fluid injection and collection structure; open the gas storage tank, adjust the pressure of carbon dioxide gas in the gas pipeline by using the pressure regulating valve, detect the gas composition by the gas analyzer, and transport the carbon dioxide gas to the test cavity through the gas pipeline. S4. Use the detection mechanism to monitor the temperature, pressure and related parameters of carbon dioxide gas in the test cavity in real time; during the test, collect the fluid in the test cavity and conduct component analysis and testing on the collected fluid; and during the test, rotating the adjusting rod can drive the sample storage mechanism to rotate inside the test cavity through the support rod and the bolt, so that the porous medium in the sample box can fully contact and adsorb the fluid entering the test cavity.

[0015] The beneficial effects of the present invention compared with the prior art are as follows: 1. By simulating the injection of groundwater fluid, controlling the gas pressure and temperature through various structures, the present invention can systematically study various dynamic processes of carbon dioxide in porous media, including migration, adsorption, dissolution and chemical reactions, etc., providing a highly simulated reference basis for carbon dioxide geological storage projects. By collecting and analyzing the fluid components, study the interaction between carbon dioxide, porous media and fluids, comprehensively and deeply understand the storage mechanism of carbon dioxide in porous media, and provide comprehensive technical support for the optimization of carbon dioxide storage technology.

[0016] 2. The present invention realizes sample placement through the mutual cooperation of the inner frame, sample box, slide rail, groove and other structures of the sample storage mechanism, and uses the bolt of the adjusting mechanism to insert into the jack of the inner frame to realize the connection between the adjusting mechanism and the sample storage mechanism. After connection, the inner frame in the test cavity can be fixed and rotationally adjusted according to actual needs through the adjusting mechanism, so that carbon dioxide can better contact and react with the porous medium in the sample box.

[0017] 3. Explanation of the inner frame rotation structure Although there may be cases of internal structure rotation adjustment for uniform adsorption in other fields, the inner frame rotation structure of the carbon dioxide storage test device based on porous media in this application has significant uniqueness and innovation.

[0018] In this device, the rotation of the inner frame is not merely for the single purpose of achieving uniform adsorption. It closely cooperates with other components of the entire device to form a complete and efficient testing system. For example, when a sample is placed in the sample box and slides to the appropriate position through the cooperation of the slide rail of the inner frame and the groove of the sample box, the inner frame is rotated and installed in the test cavity. Subsequently, the bolt of the adjustment mechanism is inserted into the jack opened on one side of the inner frame for fixation. This series of operations enables the sample to be stably in a specific position during the test and facilitates the replacement and adjustment of the sample. This structure that combines sample placement, inner frame rotation and fixation, and integration with the overall test environment is specifically designed for the carbon dioxide sequestration test scenario and there is no similar comprehensive consideration and application in the rotation structures of other fields.

[0019] Meanwhile, the inner frame rotation structure of this device can also achieve more comprehensive testing of samples at different positions. Since the sequestration situation of carbon dioxide in porous media may vary due to different positions, through the rotation of the inner frame, the sample can be tested at different positions, thereby obtaining more accurate and comprehensive data, which is of great significance for in-depth study of the carbon dioxide sequestration mechanism. This function has not been involved in the rotation structures of other fields either.

[0020] 4. The design of sliding the sample by the cooperation of the slide rail and the groove of the inner frame has unique advantages The design of sliding the sample by the cooperation of the slide rail and the groove of the inner frame is not just a conventional setting for easy operation. It has an irreplaceable role and unique advantages in this device.

[0021] Firstly, this cooperation method can ensure the stability and accuracy of the sample during placement. When the sample is placed in the sample box and slides inside the inner frame, the tight cooperation between the slide rail and the groove can prevent the sample from shifting or shaking during sliding, thus ensuring that the sample can accurately reach the predetermined position. This is crucial for ensuring the reliability of the test results because the deviation of the sample position may lead to inaccurate test data, thereby affecting the evaluation of the carbon dioxide sequestration effect.

[0022] Secondly, this design facilitates the replacement and adjustment of the sample during the test. When it is necessary to replace different types of porous media or fine-tune the position of the porous media, the operator can complete it through simple sliding operations, greatly improving the efficiency and convenience of the test. This advantage can significantly shorten the test cycle and reduce the experimental cost in practical applications.

[0023] In addition, the design of the sliding rail of the inner frame cooperating with the groove to slidably place the sample is also adapted to the structure of the entire device. It coordinates with the rotating structure of the inner frame and the internal layout of the test cavity to form a compact and reasonable sample placement and test space, enabling the entire device to achieve more functions within a limited space. Brief Description of the Drawings

[0024] Figure 1 One of the overall structure diagrams of the present invention; Figure 2 Another overall structure diagram of the present invention; Figure 3 A sectional view of the test cavity of the present invention; Figure 4 A partial structure diagram of the bottom view of the test cavity of the present invention; Figure 5 A partial sectional view of the sample storage mechanism of the present invention; Figure 6 A partial sectional view of the first end cap and the adjustment mechanism of the present invention; Figure 7 A structural diagram of the fluid injection and collection structure of the present invention; Figure 8 A structural diagram of the gas supply mechanism of the present invention; Figure 9 A flowchart of the method of the present invention.

[0025] In the figures: 1. Test cavity; 2. First end cap; 3. Adjustment mechanism; 301. Adjusting rod; 302. Support rod; 303. Bolt; 304. Spring; 305. Adjusting handle; 4. Sample storage mechanism; 401. Inner frame; 402. Sample box; 403. Jack; 404. Sliding rail; 405. Groove; 5. Second end cap; 6. Drain valve; 7. Fluid injection and collection structure; 701. Water tank; 702. Return pipe; 703. Flowmeter; 704. Water pump; 705. Water delivery pipe; 8. Gas supply mechanism; 801. Gas storage tank; 802. Pressure gauge; 803. Gas delivery pipe; 804. Pressure regulating valve; 805. Gas analyzer; 9. Controller; 10. Temperature detector; 11. Pressure detector; 12. Gas detector; 13. Heating plate; 14. Bearing; 15. Flange; 16. Bolt. Detailed Embodiments

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clear and understandable, the present invention will be further described in detail in combination with embodiments and drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. The technical solutions of the present invention will be described in detail below in combination with embodiments and drawings, but the protection scope is not limited by this.

[0027] Embodiment 1 See Figures 1 to 8 , this embodiment provides a carbon dioxide sequestration test device based on porous media, including a test cavity 1, an adjustment mechanism 3, a sample storage mechanism 4, a fluid injection and collection structure 7, and a gas supply mechanism 8.

[0028] A first end cover 2 is connected to one side of the test cavity 1, a second end cover 5 is connected to the other side of the test cavity 1, and a plurality of groups of detection mechanisms are installed on the inner wall of the test cavity 1; The detection mechanism includes a temperature detector 10, a pressure detector 11 and a gas detector 12. A plurality of temperature detectors 10, pressure detectors 11 and gas detectors 12 are evenly distributed along the axial direction of the test cavity 1. A heating plate 13 is uniformly arranged inside the test cavity 1, and a controller 9 is installed at the front end of the test cavity 1; The adjustment mechanism 3 includes an adjustment rod 301. The adjustment rod 301 penetrates through the first end cover 2 and is rotatably connected to the first end cover 2. An adjustment handle 305 is installed at one end of the adjustment rod 301 outside the first end cover 2; A plurality of support rods 302 are circumferentially and evenly installed at one end of the adjustment rod 301 inside the first end cover 2. A spring 304 is installed at one end of each support rod 302 close to the inner wall of the test cavity 1, and a bolt 303 is connected to the end of the spring 304 away from the support rod 302; The sample storage mechanism 4 is installed inside the test cavity 1; The sample storage mechanism 4 includes an inner frame 401 rotatably installed inside the test cavity 1. Four sample boxes 402 are sequentially slidably installed inside the inner frame 401; Four separate sample boxes 402 can hold porous media of different materials.

[0029] Specifically, slide rails 404 are evenly distributed along the axial direction of the inner frame 401 on the inner wall of the inner frame 401, and grooves 405 are formed on the periphery of the sample box 402; The slide rails 404 cooperate with the grooves 405 to make the sliding of the sample box 402 in the inner frame 401 smoother and more stable, facilitating the placement and removal of samples.

[0030] One side of the inner frame 401 is provided with insertion holes 403; The number of insertion holes 403 is the same as that of the bolts 303.

[0031] A number of through holes are evenly distributed on the inner frame 401 and the sample box 402.

[0032] A drain valve 6 is installed at the bottom of the first end cap 2, and the drain valve 6 is connected to the second end cap 5 through a fluid injection and collection structure 7; The gas supply mechanism 8 includes a gas pipeline 803 connected to the second end cap 5. A gas analyzer 805 is installed on the gas pipeline 803. A pressure regulating valve 804 is connected to the periphery of the gas pipeline 803 on one side of the gas analyzer 805. The end of the gas pipeline 803 is connected to a gas storage tank 801.

[0033] During the use of the test device, first, representative porous media to be tested are selected. The characteristics of these samples, such as pore structure, permeability, and mineral composition, should be as close as possible to the porous media used for carbon dioxide sequestration under actual geological conditions. The selected samples are carefully placed in the sample box 402. After being placed, the sample box 402 is placed inside the inner frame 401. After being placed, the first end cap 2 and the second end cap 5 are assembled on both sides of the test cavity 1 to achieve the sealed assembly of the test cavity 1; When the first end cap 2 is assembled on the side of the test cavity 1, the plug 303 squeezes the spring 304 after contacting the inner frame 401 and retracts the plug 303 into the inside of the support rod 302. After the assembly is completed, the adjusting rod 301 is rotated. During the rotation of the adjusting rod 301, the support rod 302 is driven to rotate simultaneously. When the plug 303 moves to the position of the jack 403, the plug 303 is inserted into the inside of the jack 403 under the push of the spring 304, thereby realizing the connection between the adjusting mechanism 3 and the sample storage mechanism 4. The position of the inner frame 401 can be finely adjusted and fixed according to actual needs to make the sample more stable during the test; The fluid meeting the test requirements is transported into the inside of the second end cap 5 through the fluid injection and collection structure 7. The fluid flows into the inside of the test cavity 1 through the second end cap 5. The gas storage tank 801 is opened, and the carbon dioxide gas stored inside the gas storage tank 801 enters the inside of the gas pipeline 803. The pressure regulating valve 804 automatically adjusts the pressure of the gas according to the set pressure value to make it meet the pressure conditions required for the test. The gas analyzer 805 can accurately analyze the purity of carbon dioxide in the gas and whether there are other impurities, ensuring that the carbon dioxide gas entering the test cavity 1 meets the test requirements and avoiding interference of impurities on the test results. The carbon dioxide gas after adjustment and detection is transported to the test cavity 1 through the gas pipeline 803; The temperature detector 10 is used to monitor the temperature change in the test chamber 1 in real time. To simulate the temperature conditions at different geological depths, the temperature can be increased or decreased by the heating plate 13. The pressure detector 11 monitors the pressure in the test chamber 1 in real time. The change in pressure reflects processes such as the injection, diffusion, and interaction with fluids of carbon dioxide in the porous medium. The gas detector 12 monitors the relevant parameters of carbon dioxide gas, such as the concentration distribution, etc., to understand the distribution and migration of carbon dioxide in the porous medium. The controller 9 can store and display these data, and regulate the test process according to the preset program; During the test, rotating the adjusting rod 301 can drive the sample storage mechanism 4 to rotate inside the test chamber 1 through the support rod 302 and the bolt 303, ensuring that the porous medium in the sample box 402 can fully contact and adsorb the fluid entering the inside of the test chamber 1. The fluid in the test chamber 1 is refluxed to the inside of the fluid injection and collection structure 7 through the drain valve 6. This process simulates the fluid circulation and exchange process in the actual geological environment. The fluid that refluxes into the inside of the fluid injection and collection structure 7 is collected, and relevant tests on its composition are carried out. By analyzing the change in the fluid composition, the dissolution of carbon dioxide in the porous medium and the influence of the chemical reaction between carbon dioxide and the porous medium on the fluid composition can be studied.

[0034] As Figure 1 , Figure 2 and Figure 8 shown: Specifically, the gas supply mechanism 8 further includes a pressure gauge 802 installed on the top of the gas storage tank 801. A number of sampling windows are installed on the top of the gas storage tank 801. Among them, a sealing structure is installed on the sampling window.

[0035] As can be seen from the above, the pressure gauge 802 is used to monitor the gas pressure in the gas storage tank 801 in real time, ensuring the stability and safety of gas supply. Using the sampling window on the gas storage tank 801, it is convenient to obtain gas samples from the gas storage tank 801 for analysis.

[0036] As Figure 3 and Figure 4 shown: Specifically, bearings 14 are installed at both ends inside the test chamber 1. The bearings 14 are sleeved on the periphery of the inner frame 401; the bearings 14 enable the inner frame 401 to rotate more smoothly inside the test chamber 1, reducing the friction and resistance during rotation, and ensuring the normal operation of the sample storage mechanism 4.

[0037] As Figure 1 , Figure 2 and Figure 7 shown: Specifically, the fluid injection and collection structure 7 includes a return pipe 702 connected to the drain valve 6. One side of the return pipe 702 is connected to a water tank 701, and a water inlet pipe is installed on the water tank 701. The fluid injection and collection structure 7 further includes a flow meter 703 connected to the water tank 701. One side of the flow meter 703 is connected to a water pump 704, and a water delivery pipe 705 is connected between the water pump 704 and the second end cover 5.

[0038] As can be seen from the above, the fluid generated during the test is returned to the water tank 701 to achieve the recycling of the fluid. The water inlet pipe on the water tank 701 can supplement the required fluid. The flow meter 703 is used to measure the flow rate of the fluid, the water pump 704 provides power for the delivery of the fluid, and the water delivery pipe 705 connects the water pump 704 and the second end cover 5 to accurately inject the fluid into the test cavity 1.

[0039] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 , Figure 7 and Figure 8 shown: Specifically, flanges 15 are installed on the peripheries of the test cavity 1, the first end cover 2, and the second end cover 5, and the adjacent flanges 15 are connected by bolts 16. This connection method makes it convenient to disassemble and assemble each part of the device, and at the same time ensures the connection tightness to prevent gas or fluid leakage during the test.

[0040] Embodiment 2 Referring to Figures 1 to 9 , this embodiment proposes a carbon dioxide sequestration test method based on porous media, using the carbon dioxide sequestration test device described in Embodiment 1, which specifically includes the following steps: S1. Place the porous media to be tested in the sample box 402. Utilize the cooperation between the slide rails 404 of the inner frame 401 of the sample storage mechanism 4 and the grooves 405 of the sample box 402 to make the sample box 402 slide to a suitable position inside the inner frame 401, and then rotate the inner frame 401, and install the inner frame 401 inside the test cavity 1 through the bearings 14 at both ends. The sample box 402 is used to store the porous media to be tested. The setting of the bearings 14 enables the inner frame 401 to rotate flexibly relative to the test cavity 1, providing convenience for subsequent possible sample position adjustment or simulating dynamic changes under actual geological conditions.

[0041] S2. Connect and seal the test cavity 1, the first end cover 2, and the second end cover 5 through the flanges 15 and bolts 16 to ensure the tightness of the device. During the connection process, the bolts 16 need to be tightened according to a certain sequence and torque requirements to ensure firm connection and good sealing between various components.

[0042] S3. Rotate the adjusting rod 301 of the adjusting mechanism 3 to drive the support rod 302 to drive the bolt 303 to move. Through the expansion and contraction of the spring 304, the bolt 303 is inserted into the jack 403 opened on one side of the inner frame 401 to fix the inner frame 401. After the adjusting mechanism 3 is connected to the sample storage mechanism 4, the position of the inner frame 401 can be finely adjusted and fixed according to actual needs, making the sample more stable during the test.

[0043] S4. Inject an appropriate amount of fluid into the water tank 701 through the water inlet pipe of the fluid injection and collection structure 7. Use the flowmeter 703 to measure the fluid flow rate, start the water pump 704, and inject the fluid in the water tank 701 into the test cavity 1 through the water delivery pipe 705. These fluids usually simulate groundwater in the actual geological environment. Their composition and properties have an important impact on the sequestration behavior of carbon dioxide in porous media. Different flow rates may cause differences in the migration, dissolution, etc. of carbon dioxide in porous media. Therefore, accurate control of the flow rate is crucial for simulating the fluid flow under actual geological conditions.

[0044] S5. Open the gas storage tank 801, monitor the pressure in the gas storage tank 801 through the pressure gauge 802, adjust the pressure of the carbon dioxide gas in the gas transmission pipe 803 using the pressure regulating valve 804, detect the gas composition through the gas analyzer 805, and make the carbon dioxide gas be transported to the test cavity 1 through the gas transmission pipe 803.

[0045] S6. Use the temperature detector 10, pressure detector 11, and gas detector 12 of the detection mechanism to monitor the temperature, pressure, and related parameters of the carbon dioxide gas in the test cavity 1 in real time. Adjust the temperature in the test cavity 1 through the heating plate 13, and transmit the data to the controller 9 for analysis and processing.

[0046] S7. During the test, the fluid in the test cavity 1 is returned to the water tank 701 through the drain valve 6 and the return pipe 702, and related tests such as component analysis of the collected fluid are carried out to study the dissolution and chemical reaction conditions of carbon dioxide in porous media; this process simulates the fluid circulation and exchange process in the actual geological environment.

[0047] During the test, rotating the adjusting rod 301 can drive the sample storage mechanism 4 to rotate inside the test cavity 1 through the support rod 302 and the bolt 303, ensuring that the porous media in the sample box 402 can fully contact and adsorb the fluid entering the inside of the test cavity 1.

[0048] As can be seen from the above, this test method uses a specific device to comprehensively simulate actual geological conditions. By preparing a porous medium close to actual characteristics and using the various structures of the device to simulate the injection of fluid simulating groundwater, control gas pressure and temperature, it can systematically study various dynamic processes of carbon dioxide in the porous medium, including migration, adsorption, dissolution, and chemical reactions, etc., providing a highly realistic reference basis for carbon dioxide geological sequestration projects. It not only focuses on the sequestration behavior of carbon dioxide itself, but also studies the interactions between carbon dioxide, the porous medium, and the fluid through the collection and analysis of fluid components, comprehensively and deeply understanding the sequestration mechanism of carbon dioxide in the porous medium, and providing comprehensive technical support for the optimization of carbon dioxide sequestration technology.

[0049] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific embodiments of the present invention are limited thereto. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the premise of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the patent protection scope determined by the claims submitted for the present invention.

Claims

1. A carbon dioxide sequestration test device based on a porous medium, characterized in that It includes a test chamber (1), an adjustment mechanism (3), a sample storage mechanism (4), a fluid injection and collection structure (7), and a gas supply mechanism (8); one side of the test chamber (1) is connected to a first end cover (2), the other side of the test chamber (1) is connected to a second end cover (5), and several groups of detection mechanisms are installed on the inner wall of the test chamber (1). The adjustment mechanism (3) includes an adjustment rod (301) which penetrates through the first end cover (2) and is rotatably connected to the first end cover (2). A number of support rods (302) are circumferentially and evenly installed at one end of the adjustment rod (301) inside the first end cover (2). One end of each support rod (302) close to the inner wall of the test chamber (1) is installed with a spring (304), and a plug (303) is connected to the end of the spring (304) away from the support rod (302). The sample storage mechanism (4) includes an inner frame (401) rotatably installed inside the test chamber (1), and a plurality of sample boxes (402) are sequentially slidably installed inside the inner frame (401); a jack (403) is opened on one side of the inner frame (401); the number of jacks (403) is the same as that of the plugs (303); the jacks (403) are cooperatively connected with the plugs (303) for fixing the inner frame (401); a number of through holes are evenly distributed on the inner frame (401) and the sample boxes (402); bearings (14) are installed at both ends inside the test chamber (1), and the bearings (14) are sleeved on the periphery of the inner frame (401). The first end cover (2) and the second end cover (5) are connected through a fluid injection and collection structure (7); the gas supply mechanism (8) includes an air delivery pipe (803) connected to the second end cover (5), a gas analyzer (805) is installed on the air delivery pipe (803), a pressure regulating valve (804) is connected to the periphery of the air delivery pipe (803) on one side of the gas analyzer (805), and an air storage tank (801) is connected to the end of the air delivery pipe (803).

2. The carbon dioxide sequestration test device based on a porous medium according to claim 1, characterized in that A drain valve (6) is installed at the bottom of the first end cover (2), and the drain valve (6) and the second end cover (5) are connected through a fluid injection and collection structure (7).

3. The carbon dioxide sequestration test device based on a porous medium according to claim 2, characterized in that, The fluid injection and collection structure (7) includes a return pipe (702) connected to the drain valve (6), a water tank (701) is connected to one side of the return pipe (702), and a water inlet pipe is installed on the water tank (701).

4. A carbon dioxide sequestration test device based on a porous medium according to claim 3, characterized in that, The fluid injection and collection structure (7) further includes a flow meter (703) connected to the water tank (701), a water pump (704) is connected to one side of the flow meter (703), and a water delivery pipe (705) is connected between the water pump (704) and the second end cover (5).

5. The carbon dioxide sequestration test device based on porous media according to claim 1, characterized in that, The detection mechanism includes a temperature detector (10), a pressure detector (11) and a gas detector (12). A plurality of temperature detectors (10), pressure detectors (11) and gas detectors (12) are evenly distributed along the axial direction of the test cavity (1). A heating plate (13) is evenly arranged and installed inside the test cavity (1).

6. The carbon dioxide sequestration test device based on a porous medium according to claim 1, wherein Sliding rails (404) are evenly distributed along the axial direction of the inner frame (401) on the inner wall of the inner frame (401). Grooves (405) are formed on the periphery of the sample box (402). The sliding rails (404) are slidably connected with the grooves (405) in a matching manner.

7. A carbon dioxide sequestration test device based on a porous medium according to claim 1, characterized in that, The gas supply mechanism (8) further includes a pressure gauge (802) installed on the top of the gas storage tank (801). A plurality of sampling windows are installed on the top of the gas storage tank (801). A sealing structure is installed on the sampling window.

8. The carbon dioxide sequestration test device based on porous media according to claim 1, wherein An adjusting handle (305) is installed at one end of the adjusting rod (301) located outside the first end cover (2).

9. The carbon dioxide sequestration test device based on porous media according to claim 1, characterized in that Flanges (15) are installed on the peripheries of the test cavity (1), the first end cover (2) and the second end cover (5). Adjacent flanges (15) are connected by bolts (16).

10. A method for testing carbon dioxide sequestration based on porous media, characterized in that, Adopt a carbon dioxide sequestration test device based on porous media as described in any one of claims 1-9, and include the following steps: S1. Place the porous media to be tested in the sample box (402), slide the sample box (402) to a corresponding position in the inner frame (401), and then rotate the inner frame (401). Install the inner frame (401) inside the test cavity (1) through bearings (14) at both ends. S2. Connect and seal the test cavity (1), the first end cover (2) and the second end cover (5). Rotate the adjusting rod (301) of the adjusting mechanism (3) to drive the plug (303) to move by the support rod (302). Through the expansion and contraction of the spring (304), insert the plug (303) into the jack (403) formed on one side of the inner frame (401) to fix the inner frame (401). S3. Inject fluid into the test cavity (1) through the fluid injection and collection structure (7). Open the gas storage tank (801), adjust the pressure of carbon dioxide gas in the gas transmission pipe (803) by using the pressure regulating valve (804), detect the gas composition by the gas analyzer (805), and transport the carbon dioxide gas to the test cavity (1) through the gas transmission pipe (803). S4. Use the detection mechanism to monitor the temperature, pressure and related parameters of carbon dioxide gas in the test cavity (1) in real time. During the test, collect the fluid in the test cavity (1) and conduct component analysis tests on the collected fluid. And during the test, rotating the adjusting rod (301) can drive the sample storage mechanism (4) to rotate inside the test cavity (1) through the support rod (302) and the plug (303), so that the porous media in the sample box (402) can fully contact and adsorb the fluid entering the test cavity (1).

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