Supercritical carbon dioxide immersion granite experimental device and use method

Abstract

This invention relates to the field of geological engineering technology, specifically to a supercritical carbon dioxide immersion granite experimental apparatus and its method of use. The supercritical carbon dioxide immersion granite experimental apparatus includes: a tank assembly with a closed containing space suitable for containing the material to be immersed and carbon dioxide gas; and a stirring assembly disposed within the containing space, suitable for stirring the material to be immersed. This invention addresses the problem that when conducting experiments on small or flaky granite test blocks, the small gaps between the materials lead to incomplete contact between the material to be immersed and supercritical carbon dioxide, affecting the experimental results. Therefore, it provides a supercritical carbon dioxide immersion granite experimental apparatus and its method of use.

Description

Technical Field

[0001] This invention relates to the field of geological engineering technology, specifically to a supercritical carbon dioxide immersion granite experimental apparatus and its usage method. Background Technology

[0002] Geological engineering is the science that studies geological problems and uses engineering methods to solve them. Reducing carbon emissions and finding clean, green, and renewable energy sources are the future direction of global energy development. Therefore, the utilization and storage of carbon dioxide has become a hot topic and research frontier both domestically and internationally. Due to its low density, low viscosity, higher compressibility and expansion, and almost zero surface tension, supercritical carbon dioxide can be used as a heat transfer medium to significantly increase the extraction yield of dry hot rock geothermal energy. At the same time, it can store carbon dioxide generated by industrial combustion in deep strata during convective heat transfer. Therefore, the development of supercritical carbon dioxide enhanced geothermal systems is considered a key technology for geothermal extraction and carbon dioxide geological storage.

[0003] Existing supercritical carbon dioxide immersion granite experimental devices are mostly used for immersion experiments on large granite test blocks. When conducting experiments on smaller blocks or flaky granite test blocks, the small gaps between the materials may result in incomplete contact with supercritical carbon dioxide, making it difficult to obtain experimental results and causing inconvenience in use. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that when small blocks or sheet-like granite test blocks are used for experiments, the material to be soaked is not in complete contact with supercritical carbon dioxide due to the small gap between the materials, which affects the test results. Thus, the present invention provides a supercritical carbon dioxide soaking granite test device and method.

[0005] To address the above problems, the present invention provides a supercritical carbon dioxide immersion granite experimental apparatus, comprising:

[0006] A tank assembly having a closed containment space suitable for containing the material to be soaked and carbon dioxide gas;

[0007] A stirring assembly is disposed within the containing space, and the stirring assembly is adapted to stir the material to be soaked.

[0008] Optionally, the tank assembly includes a reaction vessel and a top cover. The reaction vessel is hollow and has an opening. The top cover closes the opening, and the reaction vessel and the top cover form a closed receiving space.

[0009] Optionally, it also includes a first power component. The stirring assembly includes a stirring shaft and stirring blades. The power end of the first power component is connected to the stirring shaft. The stirring shaft extends into the reaction vessel through the top cover. The stirring blades are disposed on the outer peripheral wall of the stirring shaft.

[0010] Optionally, the system also includes a vibration assembly, which comprises an annular plate and a telescopic lever. The annular plate is connected to a stirring shaft via stirring blades. The telescopic lever is provided on the outer periphery of the annular plate. A protruding ring is fixedly provided on the inner wall of the reaction vessel. The annular plate and the protruding ring are correspondingly arranged, with a gap between them. The protruding ring has several toothed ends facing the annular plate, forming an annular shape. The toothed ends are adapted to the telescopic lever.

[0011] Optionally, the annular plate is provided with a sliding groove, and an elastic element is provided in the sliding groove. One end of the elastic element is fixedly connected to the telescopic lever, and the other end of the elastic element is fixedly connected to the annular plate.

[0012] Optionally, it also includes a temperature control component, which includes a heating tube fixedly connected to the stirring blade, the heating tube being arranged in a spiral shape within the receiving space.

[0013] Optionally, the temperature control assembly further includes a water tank, a heat exchanger, a liquid pump, and a cooling pipe, and the stirring shaft is hollow, with the water tank, heat exchanger, liquid pump, and cooling pipe located inside the stirring shaft.

[0014] Optionally, the stirring shaft is provided with a partition plate, which divides the space inside the stirring shaft into a first space and a second space. The water tank, heat exchanger and liquid pump are located in the first space, and the cooling pipe is located in the second space. The heat exchanger is connected to the water tank and the liquid pump pipeline respectively. One end of the cooling pipe is connected to the liquid pump, and the other end of the cooling pipe is connected to the water tank.

[0015] Optionally, the tank assembly further includes an inner tank, which is fitted around the outer periphery of the reaction tank, and a reinforcing plate is provided between the inner tank and the reaction tank.

[0016] Optionally, the tank assembly further includes an outer tank, which is fitted around the outer periphery of the inner tank, and an air bladder and a heat-insulating cotton board are provided between the outer tank and the inner tank.

[0017] Optionally, it also includes a bottom support, which is connected to the outer tank via a pivot.

[0018] Optionally, a second power component is provided on the bottom support, the second power component is provided on the bottom support, a slide rail is provided on the outer tank, the second power component is connected to a telescopic rod, and a slider is provided at the end of the telescopic rod opposite to the second power component, the slider being adapted to the slide rail.

[0019] Optionally, the top cover is equipped with a pressure gauge, a temperature gauge, and a safety valve.

[0020] A method for using a supercritical carbon dioxide immersion granite experimental apparatus, wherein, under experimental conditions, the stirring component thoroughly stirs the material to be immersed so that the material to be immersed comes into full contact with the carbon dioxide gas.

[0021] Optionally, the following steps are included:

[0022] 1) Place the material to be soaked into the reaction vessel, seal it by snapping it into the vessel body assembly with the sealing strip, introduce nitrogen into the reaction vessel and heat it with the heating tube at the same time. After reaching the preset pressure and temperature, keep it at the temperature and pressure for a period of time and observe the values ​​of the pressure gauge and temperature gauge to ensure the airtightness of the containment space. After it has stabilized for a period of time, open the safety valve and release the pressure.

[0023] 2) Evacuate the reaction vessel to create a vacuum environment inside the vessel. Introduce supercritical carbon dioxide into the reaction vessel and turn on the heating tube to heat the vessel until the temperature and pressure reach the preset values. If the temperature is too high, start the heat exchanger and liquid pump to cool the reaction vessel.

[0024] 3) Start the first power unit to drive the stirring shaft to rotate, so that the stirring shaft drives the stirring blades to stir the material to be soaked in the reaction tank, so that the stirring is more thorough. The telescopic lever continuously taps the inner wall of the reaction tank through the protrusion ring. At the same time, start the second power unit to drive the slider to slide along the slide rail through the telescopic rod, so that the outer tank swings back and forth.

[0025] The technical solution of this invention has the following advantages:

[0026] 1. The supercritical carbon dioxide immersion granite experimental apparatus provided by this invention includes: a tank assembly with a closed containing space suitable for containing the material to be immersed and carbon dioxide gas; and a stirring assembly disposed within the containing space, suitable for stirring the material to be immersed. Under experimental conditions, the stirring assembly thoroughly stirs the material to be immersed, ensuring sufficient contact between the material and the carbon dioxide gas. The stirring assembly also causes smaller pieces or flakes of the material to be immersed within the containing space to move, solving the problem of insufficient contact between the material and supercritical carbon dioxide due to small gaps, thus facilitating the acquisition of experimental results.

[0027] 2. The supercritical carbon dioxide immersion granite experimental apparatus provided by this invention comprises a reaction vessel and a top cover. The reaction vessel is hollow and has an opening, while the top cover closes the opening, forming a closed containment space. The closed containment space is formed through the combined action of the reaction vessel and the top cover.

[0028] 3. The supercritical carbon dioxide immersion granite experimental apparatus provided by the present invention further includes a first power component. The stirring assembly includes a stirring shaft and stirring blades. The power end of the first power component is connected to the stirring shaft. The stirring shaft extends into the reaction vessel through the top cover, and the stirring blades are disposed on the outer peripheral wall of the stirring shaft. The stirring shaft is driven to rotate by the first power component, and the stirring shaft drives the stirring blades to stir, so as to fully stir the material to be immersed in the reaction vessel.

[0029] 4. The supercritical carbon dioxide immersion granite experimental apparatus provided by the present invention further includes a vibration assembly, which comprises an annular plate and a telescopic lever. The annular plate is connected to a stirring shaft via a stirring blade. The telescopic lever is provided on the outer periphery of the annular plate. A protruding ring is fixedly provided on the inner wall of the reaction vessel. The annular plate and the protruding ring are correspondingly arranged, with a gap between them. The protruding ring has several toothed ends facing the annular plate, forming an annular shape. The toothed ends are adapted to the telescopic lever. When the toothed ends contact the telescopic lever, the telescopic lever's extension and retraction action strikes the toothed ends and the annular plate, thereby causing the inner wall of the reaction vessel to vibrate and dislodge the material to be immersed from the inner wall of the reaction vessel.

[0030] 5. The supercritical carbon dioxide immersion granite experimental apparatus provided by this invention has a groove inside the annular plate, and an elastic element inside the groove. One end of the elastic element is fixedly connected to a telescopic lever, and the other end of the elastic element is fixedly connected to the annular plate. The elastic element pushes the telescopic lever to extend and retract along the groove.

[0031] 6. The supercritical carbon dioxide immersion granite experimental apparatus provided by the present invention further includes a temperature control component, which includes a heating tube fixedly connected to a stirring blade, and the heating tube is arranged in a spiral shape within the containment space. Because the heating tube is spirally arranged, it rotates with the stirring shaft when the stirring shaft rotates, thereby increasing the temperature within the containment space.

[0032] 7. The supercritical carbon dioxide immersion granite experimental apparatus provided by this invention includes a temperature control component comprising a water tank, a heat exchanger, a liquid pump, and a cooling pipe. The stirring shaft is hollow, and the water tank, heat exchanger, liquid pump, and cooling pipe are located inside the stirring shaft. The overall temperature inside the reaction vessel is controlled through the combined action of the cooling pipe and the heating pipe.

[0033] 8. The supercritical carbon dioxide immersion granite experimental apparatus provided by this invention includes a partition plate inside the stirring shaft, which divides the space inside the stirring shaft into a first space and a second space. A water tank, heat exchanger, and liquid pump are located in the first space, while a cooling pipe is located in the second space. The heat exchanger is connected to the water tank and liquid pump pipelines respectively. One end of the cooling pipe is connected to the liquid pump, and the other end is connected to the water tank. By separating the cooling pipe within the second space through the partition plate, the cooling capacity of the cooling pipe is transferred to the containing space, preventing the cooling capacity from dissipating into the first space.

[0034] 9. The supercritical carbon dioxide immersion granite experimental apparatus provided by the present invention includes an inner tank in the tank assembly. The inner tank is sleeved on the outer periphery of the reaction tank. A reinforcing plate is provided between the inner tank and the reaction tank. The reinforcing plate enhances the strength between the reaction tank and the inner tank and avoids excessive reaction in the reaction tank leading to structural deformation.

[0035] 10. The supercritical carbon dioxide immersion granite experimental apparatus provided by the present invention includes an outer tank component, which is fitted around the outer periphery of the inner tank. An air bladder and a heat insulation cotton board are provided between the outer tank and the inner tank. The air bladder is used to prevent the impact of the inner tank from being transmitted to the outer tank, and the heat insulation cotton board is used to prevent the external temperature from affecting the temperature of the inner tank.

[0036] 11. The supercritical carbon dioxide immersion granite experimental apparatus provided by the present invention further includes a bottom support, which is connected to the outer tank via a rotating shaft so that the outer tank can rotate relative to the bottom support, thereby allowing the material to be immersed in the reaction tank to move fully.

[0037] 12. The supercritical carbon dioxide immersion granite experimental apparatus provided by the present invention includes a second power component mounted on a bottom support. The outer tank is equipped with a slide rail, and the second power component is connected to a telescopic rod. A slider is located at the end of the telescopic rod opposite to the second power component, and the slider is adapted to the slide rail. The second power component drives the telescopic rod to extend and retract, causing the slider to move, thereby causing the outer tank to rotate relative to the bottom support.

[0038] 13. The supercritical carbon dioxide immersion granite experimental apparatus provided by the present invention has a pressure gauge, a thermometer and a safety valve on the top cover. The pressure gauge detects the pressure inside the reaction vessel. When the pressure exceeds the preset value, the pressure is released through the safety valve. The thermometer detects the temperature inside the reaction vessel. Attached Figure Description

[0039] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0040] Figure 1 A schematic diagram of the supercritical carbon dioxide immersion granite experimental apparatus provided in an embodiment of the present invention;

[0041] Figure 2 This is a front view of the supercritical carbon dioxide immersion granite experimental apparatus provided in an embodiment of the present invention;

[0042] Figure 3 This is a front sectional view of the supercritical carbon dioxide immersion granite experimental apparatus provided in an embodiment of the present invention.

[0043] Figure 4 A partial half-sectional view of the supercritical carbon dioxide immersion granite experimental apparatus provided in an embodiment of the present invention;

[0044] Figure 5 This is a schematic diagram showing the connection between the first power component, stirring shaft, stirring blade and heating tube provided in an embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram showing the first water tank, heat exchanger, liquid pump, and cooling pipe located inside the stirring shaft in an embodiment of the present invention.

[0046] Figure 7 This is a schematic diagram of an annular plate provided in an embodiment of the present invention;

[0047] Figure 8 for Figure 7 A magnified view from direction A.

[0048] Explanation of reference numerals in the attached drawings: 1. Outer tank; 2. Airbag; 3. Inner tank; 4. Reaction vessel; 5. Top cover; 6. Motor; 7. Stirring shaft; 8. Vibration assembly; 801. Annular plate; 802. Slide groove; 803. Elastic element; 804. Telescopic lever; 9. Stirring blade; 10. Heating tube; 11. Water tank; 12. Heat exchanger; 13. Liquid pump; 14. Cooling tube; 15. Partition plate; 16. Reinforcing plate; 17. Protrusion ring; 18. Insulation cotton board; 19. Sealing ring; 20. Pressure gauge; 21. Thermometer; 22. Rotating shaft; 23. Bottom support; 24. Slide rail; 25. Slider; 26. Telescopic rod; 27. Secondary power component; 28. Safety valve. Detailed Implementation

[0049] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0053] like Figure 1 A specific embodiment of the supercritical carbon dioxide immersion granite experimental apparatus shown in Figure 8 includes: a tank assembly and a bottom support 23 for supporting the tank assembly.

[0054] like Figure 1 , Figure 2 , Figure 4 As shown, the tank assembly includes an outer tank 1, an inner tank 3, and a reaction tank 4. The inner tank 3 is fitted around the outer periphery of the reaction tank 4, and the outer tank 1 is fitted around the outer periphery of the inner tank 3. A reinforcing plate 16 is provided between the inner tank 3 and the reaction tank 4, and an airbag 2 and an insulation cotton board 18 are provided between the outer tank 1 and the inner tank 3. It should be noted that the cross-sections of the reaction tank 4, the inner tank 3, and the outer tank 1 are all U-shaped, and the end faces of the openings of the reaction tank 4, the inner tank 3, and the outer tank 1 are flush. Figure 3 , Figure 4 As shown, the reinforcing plates 16 are ring-shaped, four in number, and spaced apart to strengthen the reaction vessel 4. Figure 3 , Figure 4 As shown, both the airbag 2 and the insulation panel are arranged in a ring shape. There are two airbags 2, and they are spaced apart. This is to create a sealed containment space, as... Figure 1 , Figure 3 and Figure 4As shown, the tank assembly also includes a top cover 5. The reaction tank 4 is hollow and has an opening. The top cover 5 closes the opening, forming a closed containment space suitable for holding the material to be soaked and carbon dioxide. Specifically, the material to be soaked is a small piece or sheet of granite. It should be noted that the outer diameter of the top cover 5 is equal to the outer diameter of the outer tank 1. To improve sealing, such as... Figure 4 As shown, a sealing ring 19 is bolted to the bottom of the top cover 5, and the top cover 5 is connected to the reaction vessel 4, the inner vessel 3 and the outer vessel 1 respectively through the sealing ring 19 to enhance the sealing of the vessel assembly, so that the material to be soaked inside is not easily leaked out.

[0055] To fully agitate the material to be soaked within the reaction vessel 4, a stirring assembly and a first power unit are also included. The stirring assembly includes a stirring shaft 7 and stirring blades 9. The power end of the first power unit is connected to the stirring shaft 7. The first power unit is located above the top cover 5. The stirring shaft 7 extends into the reaction vessel 4 through the top cover 5, and the stirring blades 9 are located on the outer peripheral wall of the stirring shaft 7. Specifically, the first power unit is a servo motor 6. To prevent the stirring blades 9 from sticking to the material to be soaked, the stirring blades 9 are made of stainless steel, and a polytetrafluoroethylene protective sleeve is provided on the outer periphery of the stirring blades 9 to protect the material to be soaked. Figure 3 , Figure 4 and Figure 5 As shown, there are nine stirring blades 9, which are arranged along the central axis of the stirring shaft 7 to form a spiral configuration. The first power component rotates, driving the stirring shaft 7 to rotate, thereby fully stirring the material to be soaked in the reaction vessel 4.

[0056] To shake off the material to be soaked from the inner wall of reaction vessel 4, a vibration assembly 8 is also included. For example... Figure 4 , Figure 5 , Figure 7 and Figure 8 As shown, the vibration assembly 8 includes an annular plate 801 and a telescopic lever 804. The annular plate 801 is connected to the stirring shaft 7 via a stirring blade 9. The telescopic lever 804 is provided on the outer periphery of the annular plate 801. A protruding ring 17 is fixedly provided on the inner wall of the reaction vessel 4. The annular plate 801 and the protruding ring 17 are correspondingly arranged, with a gap between them. The protruding ring 17 has several toothed ends facing the annular plate 801, forming an annular shape. These toothed ends are adapted to the telescopic lever 804. It should be noted that the cross-section of the toothed ends is a right-angled triangle. Figure 5 As shown, the annular plate 801 is provided with six telescopic levers 804, which are arranged at equal angles on the annular plate 801. Figure 7 , Figure 8As shown, the annular plate 801 is provided with a groove 802, and the grooves are arranged one-to-one with the telescopic levers 804. Each groove 802 is provided with an elastic element 803. One end of the elastic element 803 is fixedly connected to the telescopic lever 804, and the other end of the elastic element 803 is fixedly connected to the annular plate 801. Specifically, the elastic element 803 is a spring. When the toothed end contacts the telescopic lever 804, the stirring shaft 7 drives the annular plate 801 to rotate, causing the telescopic lever 804 to move along the shape of the toothed end. Due to the extension and retraction of the telescopic lever 804, the toothed end and the annular plate 801 are struck, thereby causing the inner wall of the reaction tank 4 to vibrate, so as to shake off the material to be soaked on the inner wall of the reaction tank 4.

[0057] To control the temperature inside reaction vessel 4, such as Figure 5 , Figure 6 As shown, it also includes a temperature control assembly, which includes a heating tube 10 fixedly connected to the stirring blade 9, and the heating tube 10 is arranged in a spiral shape within the accommodating space. To reduce the temperature inside the reaction vessel 4, the temperature control assembly also includes a water tank 11, a heat exchanger 12, a liquid pump 13, and a cooling pipe 14, as shown. Figure 6 As shown, a partition plate 15 is provided inside the stirring shaft 7, which divides the space inside the stirring shaft 7 into a first space and a second space. The water tank 11, heat exchanger 12 and liquid pump 13 are located in the first space, and the cooling pipe 14 is located in the second space. The heat exchanger 12 is connected to the water tank 11 and the liquid pump 13 respectively. One end of the cooling pipe 14 is connected to the liquid pump 13, and the other end of the cooling pipe 14 is connected to the water tank 11 to form a cooling cycle.

[0058] like Figure 1 , Figure 2 As shown, the two sides of the bottom support 23 are respectively connected to the outer tank 1 via a rotating shaft 22, so that the outer tank 1 can rotate relative to the bottom support 23. Figure 1 As shown, a second power component 27 is provided on the bottom support 23. The outer tank 1 is provided with a slide rail 24. The second power component 27 is connected to a telescopic rod 26. A slider 25 is provided at the end of the telescopic rod 26 opposite to the second power component 27. The slider 25 is adapted to the slide rail 24. Specifically, the second power component 27 is a telescopic cylinder.

[0059] To achieve automatic control, a controller is also included. The top cover 5 is equipped with a pressure gauge 20, a temperature gauge 21, an injection valve, and a safety valve 28. The controller is connected to the first power unit, the second power unit 27, the pressure gauge 20, the temperature gauge 21, the safety valve 28, the liquid pump 13, and the heat exchanger 12.

[0060] A method for using a supercritical carbon dioxide immersion granite experimental apparatus includes the following steps:

[0061] 1) Place the material to be soaked into the reaction vessel 4, seal it by snapping it with the sealing strip and the vessel assembly, open the injection valve, and introduce nitrogen into the reaction vessel 4. At the same time, the heating tube 10 heats it. After reaching the preset pressure and temperature, keep it warm and pressurized for a period of time. Observe the values ​​of pressure gauge 20 and temperature gauge 21 to ensure the airtightness of the containment space. After it has stabilized for a period of time, open the safety valve 28 to release the pressure.

[0062] 2) Vacuum the reaction vessel 4 by injecting the valve to create a vacuum environment inside the reaction vessel 4, introduce supercritical carbon dioxide into the reaction vessel 4, turn on the heating tube 10 to heat the reaction vessel 4 to bring the temperature and pressure inside the reaction vessel 4 to the preset value. If the temperature is too high, start the heat exchanger 12 and the liquid pump 13 to cool down the temperature inside the reaction vessel 4.

[0063] 3) The controller starts the first power unit, which drives the stirring shaft 7 to rotate. The stirring shaft 7 drives the stirring blade 9 to stir the material to be soaked in the reaction tank 4, making the stirring more thorough. The telescopic lever 804 continuously taps the inner wall of the reaction tank 4 through the protrusion ring 17, causing the material to be soaked that is attached to the inner wall of the reaction tank 4 to peel off due to vibration. At the same time, the second power unit 27 is started, which drives the slider 25 to slide along the slide rail 24 through the telescopic rod 26, causing the outer tank 1 to swing back and forth, so that the material to be soaked comes into full and uniform contact with the supercritical carbon dioxide.

[0064] As an alternative implementation, the cross-section of the tooth block end can also be an isosceles triangle, an arc, or other shapes.

[0065] As an alternative implementation, the elastic element 803 may also be other elastic components such as a rubber rod.

[0066] As an alternative implementation, the second power component 27 can also be a hydraulic telescopic cylinder, a telescopic motor 6, etc.

[0067] As an alternative implementation, the number of stirring blades 9 can be 1, 2 or even more.

[0068] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A supercritical carbon dioxide immersion granite experimental apparatus, characterized in that, include: The tank assembly has a closed containment space suitable for containing the material to be soaked and carbon dioxide gas. The tank assembly includes a reaction vessel (4) and a top cover (5). A stirring assembly is disposed within the accommodating space, and the stirring assembly is adapted to stir the material to be soaked. It also includes a first power component. The stirring assembly includes a stirring shaft (7) and stirring blades (9). The power end of the first power component is connected to the stirring shaft (7). The stirring shaft (7) extends into the reaction vessel (4) through the top cover (5). The stirring blades (9) are located on the outer peripheral wall of the stirring shaft (7). It also includes a vibration assembly (8), which includes an annular plate (801) and a telescopic lever (804). The annular plate (801) is connected to the stirring shaft (7) through a stirring blade (9). The telescopic lever (804) is provided on the outer periphery of the annular plate (801). A protrusion ring (17) is fixedly provided on the inner wall of the reaction vessel (4). The annular plate (801) and the protrusion ring (17) are correspondingly arranged. There is a gap between the annular plate (801) and the protrusion ring (17). The protrusion ring (17) is provided with a number of toothed ends facing the annular plate (801). The toothed ends are arranged in a ring along the circumference of the protrusion ring (17). The toothed ends are adapted to the telescopic lever (804). The annular plate (801) is provided with a sliding groove (802), and an elastic element (803) is provided in the sliding groove (802). One end of the elastic element (803) is fixedly connected to the telescopic lever (804), and the other end of the elastic element (803) is fixedly connected to the annular plate (801).

2. The experimental apparatus for supercritical carbon dioxide immersion of granite according to claim 1, characterized in that, The reaction vessel (4) is hollow and has an opening. The top cover (5) closes the opening, and the reaction vessel (4) and the top cover (5) form a closed containment space.

3. The experimental apparatus for supercritical carbon dioxide immersion of granite according to claim 1, characterized in that, It also includes a temperature control component, which includes a heating tube (10) that is fixedly connected to a stirring blade (9) and is arranged in a spiral shape within the accommodating space.

4. The experimental apparatus for supercritical carbon dioxide immersion of granite according to claim 3, characterized in that, The temperature control assembly also includes a water tank (11), a heat exchanger (12), a liquid pump (13), and a cooling pipe (14). The stirring shaft (7) is hollow, and the water tank (11), heat exchanger (12), liquid pump (13), and cooling pipe (14) are located inside the stirring shaft (7).

5. The experimental apparatus for supercritical carbon dioxide immersion of granite according to claim 4, characterized in that, The stirring shaft (7) is provided with a partition plate (15), which divides the space inside the stirring shaft (7) into a first space and a second space. The water tank (11), heat exchanger (12) and liquid pump (13) are located in the first space, and the cooling pipe (14) is located in the second space. The heat exchanger (12) is connected to the water tank (11) and the liquid pump (13) respectively. One end of the cooling pipe (14) is connected to the liquid pump (13), and the other end of the cooling pipe (14) is connected to the water tank (11).

6. The experimental apparatus for supercritical carbon dioxide immersion of granite according to claim 5, characterized in that, The tank assembly also includes an inner tank (3), which is fitted around the outer periphery of the reaction tank (4), and a reinforcing plate (16) is provided between the inner tank (3) and the reaction tank (4).

7. The experimental apparatus for supercritical carbon dioxide immersion of granite according to claim 6, characterized in that, The tank assembly also includes an outer tank (1), which is fitted around the outer periphery of the inner tank (3). An airbag (2) and a heat-insulating cotton board (18) are provided between the outer tank (1) and the inner tank (3).

8. The experimental apparatus for supercritical carbon dioxide immersion of granite according to claim 7, characterized in that, It also includes a bottom bracket (23), which is connected to the outer tank (1) via a pivot (22).

9. The experimental apparatus for supercritical carbon dioxide immersion of granite according to claim 8, characterized in that, The bottom support (23) is provided with a second power component (27), the second power component (27) is provided on the bottom support (23), the outer tank (1) is provided with a slide rail (24), the second power component (27) is connected to a telescopic rod (26), the end of the telescopic rod (26) away from the second power component (27) is provided with a slider (25), the slider (25) is adapted to the slide rail (24).

10. The experimental apparatus for supercritical carbon dioxide immersion of granite according to claim 7, characterized in that, The top cover (5) is equipped with a pressure gauge (20), a temperature gauge (21) and a safety valve (28).

11. A method of using a supercritical carbon dioxide immersion granite experimental apparatus, for use with the supercritical carbon dioxide immersion granite experimental apparatus of claim 9, characterized in that, Under test conditions, the stirring assembly thoroughly stirs the material to be soaked to ensure that the material is in full contact with the carbon dioxide gas.

12. The method of using the supercritical carbon dioxide immersion granite experimental apparatus according to claim 11, characterized in that, Includes the following steps: 1) Put the material to be soaked into the reaction vessel (4), seal it by snapping it with the tank assembly through the sealing strip, introduce nitrogen into the reaction vessel (4), and heat it with the heating tube (10) at the same time. After reaching the preset pressure and temperature, keep it warm and pressurized for a period of time, observe the values ​​of the pressure gauge (20) and temperature gauge (21) to ensure the airtightness of the containment space. After it has stabilized for a period of time, open the safety valve (28) to release the pressure. 2) Evacuate the reaction vessel (4) to create a vacuum environment inside the reaction vessel (4), introduce supercritical carbon dioxide into the reaction vessel (4), turn on the heating tube (10) to heat the reaction vessel (4) to bring the temperature and pressure inside the reaction vessel (4) to the preset value. If the temperature is too high, start the heat exchanger (12) and the liquid pump (13) to cool down the temperature inside the reaction vessel (4). 3) Start the first power component to drive the stirring shaft (7) to rotate, so that the stirring shaft (7) drives the stirring blade (9) to stir the material to be soaked in the reaction tank (4). The telescopic lever (804) continuously knocks on the inner wall of the reaction tank (4) through the protrusion ring (17). At the same time, start the second power component (27) to drive the slider (25) to slide along the slide rail (24) through the telescopic rod (26), and drive the outer tank (1) to swing back and forth.

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