An experimental simulation device and method for carbon dioxide sequestration

Abstract

The present invention relates to the technical field of carbon dioxide sequestration, and particularly relates to a carbon dioxide sequestration experimental simulation device and method, including a mounting rack, on which a reaction kettle is installed, and a heating member for heating the reaction kettle is installed at the bottom in a lifting manner. The reaction kettle is internally provided with a first reaction section, a second reaction section, and a third reaction section; a lifting assembly, including a lifting rod, on both sides of the lifting rod, there are telescopic rods for driving the lifting rod to move up and down. The lower end of the lifting rod extends into the interior of the reaction kettle, and a lifting disc is fixedly installed at the bottom of the lifting rod. The diameter of the lifting disc is the same as the diameter at the third reaction section of the reaction kettle; a stirring assembly is rotatably installed inside the lifting disc. In the present invention, by arranging a lifting disc inside the reaction kettle, when solid carbonate is generated during the reaction, the solid carbonate is taken out, and the reaction kettle does not need to be opened for a long time during the whole taking-out process, reducing the influence of the sampling process on the internal reaction environment of the reaction kettle.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide sequestration, and specifically relates to a carbon dioxide sequestration experiment simulation device and method. Background Art

[0002] The subsea carbon dioxide sequestration experiment is a complex and comprehensive research process, aiming to explore the feasibility and technical methods of safely and effectively sequestering carbon dioxide in subsea sediment strata or rock formations; the experimental process usually includes: simulation experiments of water-rock reactions under static closed / dynamic open conditions, simulation experiments of the kinetic processes of dissolution / precipitation reactions of silicate minerals, evaluation experiments of the dissolution and stability of carbonate minerals, in-situ mineral carbonation experiments of carbon dioxide in the supercritical state, etc.

[0003] During the experimental process, it is necessary to continuously sample and observe the reaction substances. In the existing carbon dioxide sequestration experiment simulation device during the experimental process, although the gaseous and liquid carbon dioxide inside the reaction kettle can be sampled through pipelines, it is difficult to sample the solid substances generated by the reaction of carbon dioxide with silicate minerals or natural rock samples (carbon dioxide reacts with minerals rich in metal ions such as magnesium and calcium to generate carbonate minerals). Summary of the Invention

[0004] Technical Problem to be Solved

[0005] In view of the above-mentioned drawbacks of the prior art, the present invention provides a carbon dioxide sequestration experiment simulation device and method, which can effectively solve the problem that it is difficult to operate during the process of sampling the solid substances generated by the reaction of carbon dioxide with minerals or silicate rocks inside the reaction kettle in the prior art.

[0006] Technical Solution

[0007] To achieve the above object, the present invention is realized through the following technical solutions:

[0008] The present invention provides a carbon dioxide sequestration experiment simulation device and method, including a mounting frame, on which a reaction kettle is installed above, and a heating member for heating the reaction kettle is installed at the bottom in a lifting manner. The reaction kettle is distributed with a first reaction section, a second reaction section and a third reaction section;

[0009] A lifting assembly, including a lifting rod, on both sides of the lifting rod are telescopic rods for driving the lifting rod to move up and down. The lower end of the lifting rod extends into the interior of the reaction kettle, and a lifting disc is fixedly installed at the bottom of the lifting rod. The diameter of the lifting disc is the same as the diameter at the third reaction section of the reaction kettle. The lifting disc is used to separate the first reaction section, the second reaction section and the third reaction section at different reaction stages;

[0010] The stirring assembly is rotatably installed inside the lifting plate and is used for stirring the reaction substances inside the reaction kettle.

[0011] Furthermore, two telescopic members are fixedly installed at the bottom of the mounting frame, and the two sides of the heating member are respectively fixedly connected above the two telescopic members. The telescopic members are used to drive the heating member to move up and down.

[0012] Furthermore, the first reaction section, the second reaction section, and the third reaction section are distributed in sequence from bottom to top. The inner wall diameter of the first reaction section is larger than that of the third reaction section, and the inner wall where the second reaction section is located is an inclined surface.

[0013] Furthermore, a plurality of mounting grooves are provided on the lifting plate. The stirring assembly is rotatably installed inside the mounting grooves. The lifting rod is hollow inside, and a transmission shaft for driving the stirring assembly to rotate is rotatably installed inside the lifting rod. The upper end of the transmission shaft extends out of the lifting rod, and a driving member for driving the transmission shaft to rotate is suspended and installed above the reaction kettle.

[0014] Furthermore, a lifting shaft is slidably installed up and down below the transmission shaft. The lifting shaft is rotatably and sealingly installed inside the lifting rod. A rotating disk is fixedly installed at the bottom of the lifting shaft, and a driving gear for driving the stirring assembly to rotate is provided on the rotating disk.

[0015] Furthermore, the stirring assembly includes a stirring plate. One end of the stirring plate is provided with a sliding rod. An installation cylinder for allowing the sliding rod to slide into is provided on one side of the mounting groove of the lifting plate. A meshing gear is rotatably installed inside the installation cylinder. The meshing gear is in meshing transmission with the driving gear, and the meshing gear is used to drive the stirring plate to rotate inside the mounting groove.

[0016] Furthermore, the projection contour of the stirring plate in a top view is an isosceles trapezoid. The contour shape of the mounting groove is adapted to the stirring plate. An elastic member for pushing the stirring plate to move away from the installation cylinder is fixedly installed inside the installation cylinder. Two ends of the elastic member are respectively connected to the inner wall of the installation cylinder and one end of the sliding rod.

[0017] Furthermore, a sealing groove is provided on the inner wall of the mounting groove. The height of the sealing groove is adapted to the thickness of the stirring plate. One end of the stirring plate away from the installation cylinder is rotatably installed with a sliding plate through a rotating connecting member, and the other end of the sliding plate passes through the lifting plate and extends out.

[0018] A method for simulating carbon dioxide sequestration experiments includes the following steps:

[0019] S1. First, put mineral or natural rock mineral samples rich in metal ions such as magnesium and calcium that react with carbon dioxide into the reaction kettle, and add a reaction solution medium to the reaction kettle;

[0020] S2. Connect the carbon dioxide gas source to the connection inlet on one side of the reaction kettle, and inject the pressurized carbon dioxide into the reaction kettle through a pressure pump to maintain a high-pressure state of carbon dioxide inside the reaction kettle.

[0021] S3. Move the heating element around the reaction kettle, heat the reaction kettle to the target temperature, adjust the pressure valve on the reaction kettle, and control the partial pressure of carbon dioxide in the reaction kettle to the target pressure.

[0022] S4. Use the driving member to drive the transmission shaft to rotate. The transmission shaft drives the plurality of stirring plates on the lifting plate to rotate through the lifting shaft, and stir the solution medium and the rock or mineral rich in metal ions such as magnesium and calcium inside the reaction kettle. Part of the carbon dioxide gas formed after heating is dissolved in the solution and reacts with the rock and mineral rich in metal ions such as magnesium and calcium to form solid carbonates.

[0023] S5. Drive the lifting rod to move upward, drive the lifting plate at the bottom of the lifting rod to move upward, so that the solid carbonate on the lifting plate moves to the upper outlet of the reaction kettle, and then open the upper outlet of the reaction kettle to take out part of the solid carbonate from the reaction kettle for detection.

[0024] Beneficial effects

[0025] The technical solution provided by the present invention has the following beneficial effects compared with the known public technologies:

[0026] 1. By arranging a lifting plate inside the reaction kettle, when solid carbonates are generated in the reaction, the lifting plate is placed at a deeper position inside the reaction kettle, so that the solid carbonates precipitate on the lifting plate. Then, the lifting rod is driven to move upward by the telescopic rod, and the solid carbonates can be brought to the upper outlet of the reaction kettle. After that, the discharge port above the reaction kettle is opened to take out the solid carbonates. During the whole taking-out process, the reaction kettle does not need to be opened for a long time, reducing the influence of the sampling process on the reaction environment inside the reaction kettle.

[0027] 2. In the present invention, three layers of space are formed inside the reaction kettle. The first reaction section is used to provide a reaction space for liquid carbon dioxide, and the third reaction section is used to cooperate with the lifting plate to form a sealed space, which is convenient for sampling solid carbonates.

[0028] 3. In the present invention, a lifting shaft is arranged below the transmission shaft. When the lifting rod moves upward, the lifting shaft is slidably connected to the transmission shaft up and down, and the lifting shaft moves upward synchronously with the lifting rod. During the rotation of the transmission shaft, the transmission shaft drives the rotating plate to rotate through the lifting shaft, thereby achieving the purpose of driving the stirring assembly to rotate.

[0029] 4. In the present invention, by arranging an elastic member inside the installation cylinder for pushing the stirring plate to move, during the stirring process, the elastic member can make the stirring plate located on the side of the installation groove farther away from the installation cylinder, leaving a gap between the stirring plate and the inner wall of the installation groove, which can prevent friction between the stirring plate and the inner wall of the installation groove during the rotation of the stirring plate and make the rotation of the stirring plate smoother.

[0030] 5. In the present invention, when taking out the solid carbonate from the inside of the reaction kettle, by rotatably arranging a sliding plate at the tail of the stirring plate, when the stirring plate moves upward along with the lifting disc, the end of the sliding plate at the tail of the stirring plate away from the stirring plate will contact the second reaction section. As the lifting disc continues to move upward, the inner wall of the reaction kettle at the second reaction section will squeeze the sliding plate to move towards the stirring plate, and the outer edge of the stirring plate will slide into the sealing groove, which can make the sealing effect between the stirring plate and the lifting disc better, enable the lifting disc to divide the inside of the reaction kettle into upper and lower layers, and can minimize the leakage of the internal pressure of the reaction kettle and reduce the influence of the sampling process on the carbon dioxide reaction experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0032] Figure 1 Schematic diagram of the overall structure of the present invention;

[0033] Figure 2 Schematic diagram of the structure of the present invention in a state where the heating member is separated from the reaction kettle;

[0034] Figure 3 Schematic diagram of the internal structure of the reaction kettle of the present invention;

[0035] Figure 4 Side view of the internal structure of the reaction kettle of the present invention;

[0036] Figure 5 Schematic diagram of the overall structure of the lifting assembly of the present invention;

[0037] Figure 6 Schematic diagram of the bottom structure of the lifting disc of the present invention;

[0038] Figure 7 Cross-sectional view of the internal structure of the lifting rod of the present invention;

[0039] Figure 8 Cross-sectional view of the internal structure of the lifting disc of the present invention.

[0040] The reference numerals in the figure respectively represent:

[0041] 1. mounting rack; 2. heating element; 21. telescopic member;

[0042] 3. reaction kettle; 3a. first reaction section; 3b. second reaction section; 3c. third reaction section; 31. discharge port;

[0043] 4. lifting assembly; 41. telescopic rod; 42. lifting rod; 43. lifting plate; 431. mounting cylinder; 432. meshing gear; 433. elastic member; 4301. sealing groove; 44. transmission shaft; 45. driving member; 46. rotating plate; 461. driving gear; 47. lifting shaft;

[0044] 5. stirring assembly; 51. stirring plate; 511. sliding rod; 52. sliding plate; 53. rotating connecting piece. Detailed implementation manners

[0045] For the purposes of making the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0046] The present invention will be further described below with reference to the embodiments.

[0047] When the carbon dioxide sequestration experiment simulation device is in use, in order to fully understand the state of carbon dioxide during the entire reaction process, the carbon dioxide and its reactants inside the reaction kettle are usually sampled intermittently to timely understand each stage of the reaction and the state of carbon dioxide. During the sampling process, although it is convenient to sample the gaseous and liquid carbon dioxide inside the reaction kettle through pipelines, it is relatively difficult to operate when sampling the solid substances generated by the reaction of carbon dioxide with silicate minerals or rock blocks.

[0048] Therefore, the embodiments of the present invention provide a carbon dioxide sequestration experiment simulation device and method, the purpose of which is at least to, by setting the lifting assembly 4, when solid carbonate is generated in the reaction, place the lifting plate 43 at a deeper position inside the reaction kettle so that the solid carbonate falls on the lifting plate 43, and then by driving the lifting rod 42 to move upward, the solid carbonate can be brought to the upper outlet of the reaction kettle, and the solid carbonate can be taken out for detection by opening the upper outlet of the reaction kettle.

[0049] Embodiment: A carbon dioxide sequestration experiment simulation device, asFigure 1 - Figure 4 As shown in the figure, it includes a mounting frame 1, with a reaction kettle 3 installed above it. There is a discharge port above the reaction kettle 3. The volume of the reaction kettle 3 is 200 ml, the inner diameter is not less than 30 mm, the working temperature is from normal temperature to 450 °C, the working pressure is not less than 70 MPa, and it is made of high-temperature resistant and corrosion-resistant Inconel625 nickel-based alloy or Hastelloy. Multiple physical and chemical sensor interfaces are arranged on the outside (such as temperature, pressure, pH value, hydrogen fugacity, oxygen fugacity, H2S, etc., which are conventional settings in the prior art and will not be elaborated in this application);

[0050] A heating element 2 for heating the reaction kettle 3 is installed at the bottom for lifting. The first reaction section 3a, the second reaction section 3b, and the third reaction section 3c are distributed in the reaction kettle 3;

[0051] A lifting assembly 4 includes a lifting rod 42. On both sides of the lifting rod 42, there are telescopic rods 41 for driving the lifting rod 42 to move up and down. The telescopic rods 41 can be selected as electric telescopic rods. The lower end of the lifting rod 42 extends into the interior of the reaction kettle 3. A lifting disk 43 is fixedly installed at the bottom of the lifting rod 42. The diameter of the lifting disk 43 is the same as the diameter at the third reaction section 3c of the reaction kettle 3. The lifting disk 43 is used to separate the first reaction section 3a, the second reaction section 3b, and the third reaction section 3c at different reaction stages;

[0052] A stirring assembly 5 is rotatably installed inside the lifting disk 43 for stirring the reaction substances inside the reaction kettle 3.

[0053] In the present invention, by arranging a lifting disk 43 inside the reaction kettle 3, when solid carbonate is generated during the reaction, the lifting disk 43 is placed at a deeper position inside the reaction kettle, so that the solid carbonate precipitates on the lifting disk 43. Then, the telescopic rod 41 drives the lifting rod 42 to move upward, and the solid carbonate can be brought to the upper outlet of the reaction kettle 3. Then, the discharge port above the reaction kettle 3 is opened, and the solid carbonate is taken out. During the whole taking-out process, the reaction kettle 3 does not need to be opened for a long time, reducing the influence of the sampling process on the internal reaction environment of the reaction kettle 3 (the reaction experiment of carbon dioxide requires maintaining a certain high-pressure state inside the reaction kettle 3, usually 0 - 50 MPa).

[0054] Furthermore, as Figure 2 shown in the figure, two telescopic members 21 are fixedly installed at the bottom of the mounting frame 1. The upper parts of the two telescopic members 21 are respectively fixedly connected to both sides of the heating element 2. The telescopic members 21 are used to drive the heating element 2 to move up and down.

[0055] Among them, by arranging two telescopic members 21 at the bottom of the mounting frame 1, the two telescopic members 21 jointly drive the up-and-down movement of the heating member 2. When the heating member 2 is at the uppermost position, the inner wall of the heating member 2 is in close contact with the outer wall of the reaction kettle 3, and the reaction substances inside the reaction kettle 3 can be heated through heat transfer. During the cooling process, the heating member 2 can be conveniently driven downward to separate the heating member 2 from the reaction kettle 3, so that the heat inside the reaction kettle 3 can quickly dissipate from the surface of the reaction kettle 3.

[0056] Further, as Figure 3 、 Figure 4 shown, the first reaction section 3a, the second reaction section 3b, and the third reaction section 3c are distributed in sequence from bottom to top. The inner diameter of the first reaction section 3a is larger than that of the third reaction section 3c, and the inner wall where the second reaction section 3b is located is an inclined surface.

[0057] Among them, by forming three layers of space inside the reaction kettle 3, the first reaction section 3a is used to provide a reaction space for liquid carbon dioxide, and the third reaction section 3c is used to cooperate with the lifting disc 43 to form a sealed space, which is convenient for sampling solid carbonate.

[0058] Further, as Figure 5 、 Figure 6 shown, a plurality of mounting grooves are provided on the lifting disc 43, the stirring assembly 5 is rotatably installed inside the mounting grooves, the inside of the lifting rod 42 is hollow, a transmission shaft 44 for driving the stirring assembly 5 to rotate is rotatably installed inside the lifting rod 42, the upper end of the transmission shaft 44 extends out of the lifting rod 42, and a driving member 45 for driving the transmission shaft 44 to rotate is suspended and installed above the reaction kettle 3.

[0059] Among them, by providing a plurality of mounting grooves on the lifting disc 43 and arranging the stirring assembly 5 inside the mounting grooves, the liquid carbon dioxide can be stirred during the heating process or during the reaction of carbon dioxide with minerals rich in metal ions such as magnesium and calcium, accelerating the reaction rate or heating uniformity among the substances inside the reaction kettle 3.

[0060] Further, as Figure 6 、 Figure 7 shown, a lifting shaft 47 is slidably installed up and down below the transmission shaft 44. The lifting shaft 47 is rotatably and sealedly installed inside the lifting rod 42. A rotating disc 46 is fixedly installed at the bottom of the lifting shaft 47, and a driving gear 461 for driving the stirring assembly 5 to rotate is provided on the rotating disc 46.

[0061] Among them, by arranging a lifting shaft 47 below the transmission shaft 44, when the lifting rod 42 moves upward, the lifting shaft 47 is slidably connected to the transmission shaft 44 up and down, and the lifting shaft 47 moves upward synchronously with the lifting rod 42. During the rotation of the transmission shaft 44, the transmission shaft 44 drives the rotating disk 46 to rotate through the lifting shaft 47, thereby achieving the purpose of driving the stirring assembly 5 to rotate.

[0062] Further, as Figure 7 、 Figure 8 shown, the stirring assembly 5 includes a stirring plate 51. One end of the stirring plate 51 is provided with a sliding rod 511. One side of the installation groove of the lifting disk 43 is provided with an installation cylinder 431 for the sliding rod 511 to slide into. A meshing gear 432 is rotatably installed inside the installation cylinder 431. The meshing gear 432 is in meshing transmission with the driving gear 461, and the meshing gear 432 is used to drive the stirring plate 51 to rotate inside the installation groove.

[0063] Among them, by arranging a sliding rod 511 at one end of the stirring plate 51, one end of the sliding rod 511 is inserted into the installation cylinder 431 and is in transmission connection with the meshing gear 432. When the driving gear 461 rotates, it can conveniently drive a plurality of stirring plates 51 to rotate around the sliding rod 511 as an axis, and can fully stir the liquid and reaction substances inside the reaction kettle 3.

[0064] Further, as Figure 7 、 Figure 8 shown, the projection contour of the top view of the stirring plate 51 is an isosceles trapezoid. The contour shape of the installation groove is adapted to the stirring plate 51. An elastic member 433 for pushing the stirring plate 51 to move away from the installation cylinder 431 is fixedly installed inside the installation cylinder 431. Two ends of the elastic member 433 are respectively connected to the inner wall of the installation cylinder 431 and one end of the sliding rod 511.

[0065] Among them, by arranging an elastic member 433 for pushing the stirring plate 51 to move inside the installation cylinder 431, during the stirring process, the elastic member 433 can make the stirring plate 51 located on the side of the installation groove farther away from the installation cylinder 431, so that there is a gap between the stirring plate 51 and the inner wall of the installation groove, which can avoid friction between the stirring plate 51 and the inner wall of the installation groove during the rotation of the stirring plate 51 and make the stirring plate 51 rotate more smoothly.

[0066] Among them, the end of the elastic member 433 connected to the sliding rod 511 is rotatably connected, and during the rotation of the sliding rod 511, the elastic member 433 will not be driven to rotate.

[0067] Further, as Figure 7 、 Figure 8As shown, a sealing groove 4301 is provided on the inner wall of the installation groove. The height of the sealing groove 4301 is adapted to the thickness of the stirring plate 51. One end of the stirring plate 51 away from the installation cylinder 431 is rotatably installed with a sliding plate 52 through a rotating connecting piece 53, and the other end of the sliding plate 52 extends through the lifting plate 43.

[0068] Among them, when taking out the solid carbonate from the inside of the reaction kettle 3, by rotatably arranging the sliding plate 52 at the tail of the stirring plate 51, when the stirring plate 51 moves upward with the lifting plate 43, the end of the sliding plate 52 at the tail of the stirring plate 51 away from the stirring plate 51 will contact the inner wall of the second reaction section 3b of the reaction kettle 3. As the lifting plate 43 continues to move upward, the inner wall of the reaction kettle 3 at the second reaction section 3b will squeeze the sliding plate 52 to move towards the direction of the stirring plate 51, and the outer edge of the stirring plate 51 will slide into the sealing groove 4301, which can make the stirring plate 51 and the lifting plate 43 have a better sealing effect, and can make the lifting plate 43 divide the inside of the reaction kettle 3 into upper and lower layers, and can minimize the leakage of the internal air pressure of the reaction kettle 3 and reduce the influence of the sampling process on the carbon dioxide reaction experiment.

[0069] In addition, during the sampling process, a booster pump can be used to convey gas into the reaction kettle to maintain the high-pressure environment inside the reaction kettle, so that the high-pressure environment inside the reaction kettle 3 is in a dynamic equilibrium state, and further reduce the influence of the sampling process on the carbon dioxide reaction experiment.

[0070] A method for simulating carbon dioxide sequestration experiments includes the following steps:

[0071] S1. First, put mineral samples or natural rock mineral samples rich in metal ions such as magnesium and calcium that react with carbon dioxide into the inside of the reaction kettle 3, add a reaction solution medium (natural seawater, brine or artificially synthesized specific solution, etc.) to the reaction kettle 3, and maintain for a period of time to stabilize the internal pressure of the reaction kettle 3 (the air pressure state is in overpressure);

[0072] S2. Connect the carbon dioxide gas source to the connection inlet on one side of the reaction kettle 3, and inject the carbon dioxide into the inside of the reaction kettle 3 after pressurizing it through a pressure pump, so that the carbon dioxide maintains a high-pressure state inside the reaction kettle 3;

[0073] S3. Move the heating element 2 to the periphery of the reaction kettle, heat the reaction kettle 3 to the target temperature, adjust the pressure valve, and control the partial pressure of carbon dioxide in the reaction kettle 3 to the target pressure;

[0074] Among them, the heating element can also be a fixed heating furnace, such as the currently commercialized reaction kettle. For details, please refer to (https: / / www.yanzheng17.com / products_detail_case_back / 49.html);

[0075] S4. Drive the transmission shaft 44 to rotate by means of the driving member 45. The transmission shaft 44 drives the rotation of a plurality of stirring plates 51 on the lifting plate 43 through the lifting shaft 47, so as to stir the solution medium inside the reaction kettle 3 and the rocks or minerals rich in metal ions such as magnesium and calcium. Part of the carbon dioxide gas formed after heating is dissolved in the solution and reacts with the rocks and minerals rich in metal ions such as magnesium and calcium to form solid carbonates.

[0076] S5. Drive the lifting rod 42 to move upward, drive the lifting plate 43 located at the bottom of the lifting rod 42 to move upward, so that the solid carbonates on the lifting plate 43 move to the upper outlet of the reaction kettle 3, and then open the upper outlet of the reaction kettle 3 to take out part of the solid carbonates from the reaction kettle 3 for detection.

[0077] Working principle: In the experimental stage, first lower the lifting plate 43 into the liquid carbon dioxide. During the reaction process, drive the transmission shaft 44 to rotate by means of the driving member 45. The transmission shaft 44 drives the rotating plate 46 to rotate through the lifting shaft 47. The driving gear 461 on the rotating plate 46 is in meshing transmission with the meshing gear 432. The meshing gear 432 drives the sliding rod 511 inserted into the meshing gear 432, thereby driving the rotation of a plurality of stirring plates 51 on the lifting plate 43, so that the liquid carbon dioxide fully contacts and reacts with the minerals rich in metal ions such as magnesium and calcium.

[0078] In the sampling stage, drive the lifting rod 42 to move upward by means of the telescopic rod 41 (at this time, the stirring plate 51 is in a horizontal state). The lower part of the lifting rod 42 drives the lifting plate 43 to move upward. At this time, the solid carbonates deposited on the lifting plate 43 move upward synchronously with the lifting plate 43. When the lifting plate 43 moves to the second reaction section 3b, the sliding plates 52 around the lifting plate 43 will contact the inner wall of the reaction kettle 3 at the second reaction section 3b and squeeze the sliding plates 52 to move towards the stirring plate 51. As the lifting plate 43 continues to move upward, the sliding plates 52 drive the outer edge of the stirring plate 51 to slide into the sealing groove 4301, increasing the sealing performance at the installation groove on the lifting plate 43, and further reducing the air pressure leakage on the lifting plate 43 during the sampling process. Then when the lifting plate 43 moves to the third reaction section 3c, the outer edge of the lifting plate 43 is in close contact with the inner wall of the reaction kettle 3 at the third reaction section 3c, forming a sampling space above the lifting plate 43. Then it is convenient to open the discharge port above the reaction kettle 3 to take out the solid carbonates on the lifting plate 43 for detection.

[0079] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A carbon dioxide storage experimental simulation device, characterized in that: include: A mounting frame (1) having a reaction kettle (3) mounted on the top and a heating element (2) for heating the reaction kettle (3) mounted on the bottom in a lifting manner, wherein a first reaction section (3a), a second reaction section (3b) and a third reaction section (3c) are distributed in the reaction kettle (3); A lifting assembly (4), comprising a lifting rod (42), telescopic rods (41) for driving the lifting rod (42) to move up and down are arranged on both sides of the lifting rod (42), the lower end of the lifting rod (42) extends into the interior of the reaction kettle (3), a lifting plate (43) is fixedly installed on the bottom of the lifting rod (42), the diameter of the lifting plate (43) is the same as the diameter of the third reaction section (3c) of the reaction kettle (3), and the lifting plate (43) is used to separate the first reaction section (3a), the second reaction section (3b) and the third reaction section (3c) in different reaction stages; A stirring assembly (5) is rotatably mounted inside the lifting plate (43) and is used to stir the reaction substances inside the reaction kettle (3); The first reaction section (3a), the second reaction section (3b) and the third reaction section (3c) are arranged in sequence from bottom to top, the inner diameter of the first reaction section (3a) is larger than that of the third reaction section (3c), and the inner wall of the second reaction section (3b) is an inclined surface; The lifting plate (43) is provided with a plurality of mounting grooves, the stirring assembly (5) is rotatably mounted inside the mounting grooves, the lifting rod (42) is hollow inside, a transmission shaft (44) for driving the stirring assembly (5) to rotate is rotatably mounted inside the lifting rod (42), the upper end of the transmission shaft (44) extends out of the lifting rod (42), and a driving member (45) for driving the transmission shaft (44) to rotate is suspended above the reaction kettle (3); A lifting shaft (47) is slidably mounted below the transmission shaft (44), the lifting shaft (47) being rotationally sealed and mounted inside the lifting rod (42), a rotating disk (46) being fixedly mounted at the bottom of the lifting shaft (47), and a driving gear (461) for driving the stirring assembly (5) to rotate is provided on the rotating disk (46); The stirring assembly (5) comprises a stirring plate (51), one end of the stirring plate (51) is provided with a sliding rod (511), one side of the installation groove of the lifting plate (43) is provided with a mounting cylinder (431) for the sliding rod (511) to slide into, a meshing gear (432) is rotatably mounted inside the installation cylinder (431), the meshing gear (432) is meshed with the driving gear (461) for transmission, and the meshing gear (432) is used to drive the stirring plate (51) to rotate inside the installation groove; The top view projection profile of the stirring plate (51) is an isosceles trapezoid, the profile shape of the mounting groove is adapted to the stirring plate (51), an elastic member (433) for pushing the stirring plate (51) to move in a direction away from the mounting cylinder (431) is fixedly mounted inside the mounting cylinder (431), and two ends of the elastic member (433) are respectively connected to the inner wall of the mounting cylinder (431) and one end of the sliding rod (511).

2. A carbon dioxide storage experimental simulation device according to claim 1, characterized in that: Two telescopic members (21) are fixedly mounted on the bottom of the mounting frame (1), and the tops of the two telescopic members (21) are respectively fixedly connected to two sides of the heating member (2), and the telescopic members (21) are used to drive the heating member (2) to move up and down.

3. A carbon dioxide storage experimental simulation device according to claim 2, characterized in that: A sealing groove (4301) is provided on the inner wall of the installation groove, and the height of the sealing groove (4301) is adapted to the thickness of the stirring plate (51). One end of the stirring plate (51) away from the installation cylinder (431) is rotatably mounted with a sliding plate (52) via a rotating connecting piece (53), and the other end of the sliding plate (52) extends through the lifting plate (43).

4. A carbon dioxide storage experimental simulation method, using a carbon dioxide storage experimental simulation device according to any one of claims 1-2, characterized in that: The following steps are involved: S1. First, a magnesium- or calcium-rich mineral or natural rock mineral sample that reacts with carbon dioxide is placed into a reactor (3), and a reaction solution medium is added to the reactor (3); S2, connecting a carbon dioxide gas source to a connection inlet on one side of the reaction kettle (3), and injecting the carbon dioxide into the reaction kettle (3) after pressurizing it using a pressure pump, so that the carbon dioxide is maintained in a high-pressure state inside the reaction kettle (3); S3, moving the heating element (2) to the vicinity of the reaction kettle (3), heating the reaction kettle (3) to a target temperature, adjusting the pressure valve on the reaction kettle (3), and controlling the partial pressure of carbon dioxide in the reaction kettle (3) to a target pressure; S4, using the driving member (45) to drive the transmission shaft (44) to rotate, and the transmission shaft (44) drives the plurality of stirring plates (51) on the lifting plate (43) to rotate through the lifting shaft (47), so as to stir the solution medium and the rock or mineral rich in magnesium and calcium in the reaction kettle (3), and the carbon dioxide gas formed after heating partially dissolves in the solution and reacts with the rock mineral rich in magnesium and calcium to form solid carbonate; S5, driving the lifting rod (42) to move upward, driving the lifting plate (43) located at the bottom of the lifting rod (42) to move upward, so that the solid carbonate located on the lifting plate (43) moves to the upper outlet of the reactor (3), and then opening the upper outlet of the reactor (3) to take part of the solid carbonate out of the reactor (3) for testing.

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