A carbon dioxide geological storage leakage early warning device

Abstract

The present application relates to the field of environmental engineering and discloses an early warning device for carbon dioxide geological storage leakage, comprising a box body, a plurality of connecting columns installed at the bottom of the box body, and a length of the connecting columns of not less than 5 meters, an iron barrel welded to the outer surface of the connecting column, a connecting hole provided on the outer surface of the connecting column, a sealing cylinder located in the inner cavity of the box body fixedly connected to the top of the connecting column, and a piston provided in the inner sealing sleeve of the sealing cylinder. The device utilizes the radial displacement (referring to the radial direction of the deep hole) generated by crustal movement in the inner wall of a deep hole in the early warning area to radially squeeze the iron barrel, thereby deforming the iron barrel, reducing the volume of the inner cavity of the iron barrel, and forcing the transmission oil to push the piston upward and the connecting plate to pressurize the pressure sensor, thereby sensing the crustal stress through the pressure sensor and giving an early warning of carbon dioxide leakage in the area. Compared with real-time monitoring of carbon dioxide content, the device has a significant early warning effect.

Description

Technical Field

[0001] The present application relates to the field of environmental engineering technology, and in particular to an early warning device for carbon dioxide geological storage leakage. Background Art

[0002] With the acceleration of human industrialization, emissions of the greenhouse gas carbon dioxide continue to increase, exacerbating the greenhouse effect and triggering an increase in extreme weather events around the world. To mitigate the greenhouse effect and protect the environment on which humanity depends, geological storage of carbon dioxide is considered an effective way to reduce atmospheric carbon dioxide levels. This involves selecting suitable geological formations (such as depleted oil and gas fields, tight oil and gas fields, saline aquifers, and deep, unrecoverable coal seams) to store captured carbon dioxide. Typically, carbon dioxide is stored in geological bodies in various states, including carbonates, water-soluble, and supercritical. It is prone to leaking along structural fractures in multi-stage strata. Furthermore, the migration of carbon dioxide fluids can easily cause stratum deformation. To provide timely warnings and prevent the expansion of carbon dioxide leaks, existing technologies generally employ early warning devices for carbon dioxide geological storage leaks. These devices, centered around carbon dioxide monitors, capture carbon dioxide emissions in the monitored area. However, this single-dimensional monitoring system falls far short of achieving early warning. Simply monitoring carbon dioxide emissions provides only monitoring, not warning. As carbon dioxide moves through the strata, stress changes occur in the caprock layer that stores carbon dioxide, which can cause the trapped carbon dioxide to leak underground. Therefore, existing early warning devices for carbon dioxide geological storage leaks can only monitor in real time and cannot provide early warning of potential carbon dioxide leaks, urgently requiring improvement. Summary of the Invention

[0003] The present application proposes an early warning device for carbon dioxide geological storage leakage, which has the advantage of good early warning effect and is used to solve the problem of early warning failure in the existing technology.

[0004] To achieve the above objectives, the present application adopts the following technical solution: an early warning device for carbon dioxide geological storage leakage, comprising:

[0005] The box body has multiple groups of connecting columns installed at the bottom of the box body, and the length of the connecting columns is not less than 5 meters. The outer surface of the connecting columns is welded with an iron barrel, and the outer surface of the connecting columns is provided with a communication hole. The top of the connecting column is fixedly connected to a sealing cylinder located in the inner cavity of the box body, and the inner sealing sleeve of the sealing cylinder is provided with a piston. The top of the piston is fixedly connected to a connecting plate. The outer surface of the sealing cylinder is fixedly installed with a mounting bracket, and the upper bottom of the mounting bracket is fixedly installed with a pressure sensor. The connecting plate abuts the pressure sensor. The inner cavity of the sealing cylinder, connecting column and iron barrel is filled with transmission oil.

[0006] The carbon dioxide concentration monitor is arranged in the upper part of the inner cavity of the box. A separation box is fixedly installed in the middle of the inner wall of the box. The top of the separation box is fixedly connected to an air outlet pipe, and the air outlet pipe is fixedly connected to the carbon dioxide concentration monitor.

[0007] Preferably, a bottom column is fixedly installed at the bottom end of the connecting column, the bottom of the bottom column is in a pointed cone shape, and the iron barrel is entirely located underground.

[0008] Preferably, a rubber sleeve is fixedly sleeved on the outer surface of the iron barrel, and mounting rings are fixedly sleeved on both ends of the iron barrel.

[0009] Preferably, an air pump is installed at the bottom of the inner wall of the box, the air inlet end of the air pump is fixedly connected to the air collecting hood located at the bottom of the box, the air collecting hood is trumpet-shaped, and the air outlet end of the air pump is fixedly connected to a connecting pipe, one end of the connecting pipe is connected to the separation box along the tangential direction of the outer surface of the separation box.

[0010] Preferably, a plurality of brackets are fixedly mounted on the outer surface of the box, and the bottoms of the brackets are fixedly mounted on the ground.

[0011] Preferably, the outer surface of the piston is movably sleeved with a spring located on the upper side of the inner cavity of the sealing cylinder. The spring is isolated from the transmission oil by the piston, and both ends of the spring are elastically connected to the sealing cylinder and the piston respectively.

[0012] Preferably, a drying column is fixedly installed on the bottom of the inner wall of the separation box, and a drying pad is fixedly installed on the inner wall of the separation box. The drying column and the drying pad are both made of solid NaOH, CaO, soda lime, solid CaCl2, and solid MgCl2.

[0013] Preferably, a plurality of contact grooves are vertically and equidistantly provided on the outer surface of the drying column, and the axial cross-section of the contact grooves is semicircular.

[0014] Preferably, the iron barrel is made of stainless steel sheet iron, and the transmission oil is pressurized by a spring and a piston and stored in the inner cavity of the sealing cylinder, the connecting column and the iron barrel.

[0015] Preferably, a fixing plate is fixedly mounted on the top of the outer surface of the connecting column, and the fixing plate is fixedly connected to the bottom of the box body by bolts.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. This device has been redesigned to significantly enhance its early warning effect. Unlike traditional real-time carbon dioxide monitoring, this device introduces crustal stress monitoring, which greatly enhances the early warning performance of the device. A connecting column is provided, and the length of the connecting column is not less than 5 meters. The purpose is to use the connecting column to drive the iron barrel and rubber sleeve on its outer surface to penetrate into the pre-drilled deep hole. The iron barrel and rubber sleeve are in contact with the deep hole and form an interference fit, so that the iron barrel is tightly in contact with the inner wall of the deep hole in the warning area. The radial displacement (referring to the radial direction of the deep hole) generated by crustal movement in the inner wall of the deep hole in the warning area is used to radially squeeze the iron barrel, thereby deforming the iron barrel and reducing the volume of the iron barrel cavity. The transmission oil is forced to push the piston and connecting plate upward to press the pressure sensor, thereby sensing the crustal stress through the pressure sensor and giving early warning of carbon dioxide leakage in the area. Compared with real-time monitoring of carbon dioxide content, it has a significant early warning effect.

[0018] 2. This device also adds a traditional carbon dioxide concentration monitor for real-time monitoring of the carbon dioxide concentration passing through it. A connecting pipe is provided to connect the tangent part installed on the outer surface of the separation box, so that the air entering the inner wall of the separation box can make a spiral downward motion around the inner wall of the separation box. The centrifugal force generated just throws the solid impurities in the air to the edge of the inner wall of the separation box, thereby achieving the purpose of separating impurities. The drying column and drying pad located inside the separation box absorb water in the air, reducing the water content in the air entering the carbon dioxide concentration monitor, thereby improving the real-time monitoring accuracy of carbon dioxide.

[0019] 3. Finally, this device combines a traditional carbon dioxide concentration monitor to monitor the concentration of carbon dioxide in real time, and cooperates with the pressure exerted on the pressure sensor to realize a multi-dimensional early warning function for carbon dioxide. The iron barrels are set up in multiple groups to monitor the crustal stress in multiple areas. Combined with the carbon dioxide concentration monitor that uploads the carbon dioxide concentration in real time, the carbon dioxide leakage early warning accuracy of the device is significantly improved. When the carbon dioxide concentration detected by the carbon dioxide concentration monitor continues to increase and the pressure exerted on the pressure sensor continues to increase, it can be determined that carbon dioxide leakage will occur in the warned area, thereby significantly improving the early warning accuracy of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which constitute a part of the specification, illustrate embodiments disclosed in the present application and, together with the description, serve to explain the principles disclosed in the present application in a clear and understandable manner.

[0021] The present disclosure can be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0022] Figure 1 This is a schematic diagram of the front appearance of the overall structure of the present invention;

[0023] Figure 2 It is a front cutaway schematic diagram of the overall structure of the present invention;

[0024] Figure 3 For the present invention Figure 2 A magnified schematic diagram of the structure at center A;

[0025] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0026] Figure 5 This is a schematic diagram of the separation of the connecting column, fixing plate, mounting ring, bottom column, iron barrel, rubber sleeve, spring, piston, connecting plate, mounting bracket and pressure sensor of the present invention;

[0027] Figure 6 Schematic diagram of the separation of the air pump, air collecting hood, connecting pipe, separation box, air outlet pipe, carbon dioxide concentration detector, drying column and drying pad of the present invention;

[0028] Figure 7 It is a schematic top view of the interior of the box body and the separation box of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the connecting column, fixing plate, mounting ring, bottom column, iron barrel, rubber sleeve, mounting frame, pressure sensor, air pump, air collecting cover, connecting pipe and separation box of the present invention.

[0030] Among them: 1. Box body; 2. Bracket; 3. Connecting column; 4. Fixed plate; 5. Mounting ring; 6. Bottom column; 7. Iron drum; 8. Rubber sleeve; 9. Connecting hole; 10. Sealing cylinder; 11. Transmission oil; 12. Spring; 13. Piston; 14. Connecting plate; 15. Mounting frame; 16. Pressure sensor; 17. Air pump; 18. Air hood; 19. Connecting pipe; 20. Separation box; 21. Air outlet pipe; 22. Carbon dioxide concentration monitor; 23. Drying column; 24. Drying pad; 25. Contact groove. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0032] See also Figures 1-8 This embodiment discloses an early warning device for carbon dioxide geological storage leakage, comprising:

[0033] Box body 1, multiple groups of connecting columns 3 are installed at the bottom of the box body 1, and the length of the connecting columns 3 is not less than 5 meters. The outer surface of the connecting column 3 is welded with an iron barrel 7, and a connecting hole 9 is opened on the outer surface of the connecting column 3. The top of the connecting column 3 is fixedly connected to a sealing cylinder 10 located in the inner cavity of the box body 1. The inner sealing sleeve of the sealing cylinder 10 is provided with a piston 13, and the top of the piston 13 is fixedly connected to a connecting plate 14. The outer surface of the sealing cylinder 10 is fixedly installed with a mounting bracket 15, and a pressure sensor 16 is fixedly installed on the upper bottom of the mounting bracket 15. The connecting plate 14 abuts against the pressure sensor 16. The inner cavity of the sealing cylinder 10, the connecting column 3 and the iron barrel 7 is filled with transmission oil 11;

[0034] A carbon dioxide concentration monitor 22 is provided in the upper portion of the inner cavity of the box body 1. A separation box 20 is fixedly mounted in the middle of the inner wall of the box body 1. An air outlet pipe 21 is fixedly connected to the top of the separation box 20. The air outlet pipe 21 is fixedly connected to the carbon dioxide concentration monitor 22.

[0035] This device has been redesigned to significantly enhance its early warning effect. Unlike traditional real-time carbon dioxide monitoring, this device introduces crustal stress monitoring, which greatly enhances the early warning performance of the device. A connecting column 3 is provided, and the length of the connecting column 3 is not less than 5 meters. The purpose is to drive the iron barrel 7 and rubber sleeve 8 on its outer surface to penetrate into the pre-drilled deep hole through the connecting column 3. The iron barrel 7 and rubber sleeve 8 are abutted against the deep hole and form an interference fit, so that the iron barrel 7 is tightly abutted against the inner wall of the deep hole in the warning area. The radial displacement (referring to the radial direction of the deep hole) generated by the crustal movement in the inner wall of the deep hole in the warning area is used to radially squeeze the iron barrel 7, thereby deforming the iron barrel 7 and reducing the volume of the inner cavity of the iron barrel 7. The transmission oil 11 is forced to push the piston 13 and the connecting plate 14 upward to press the pressure sensor 16, thereby sensing the crustal stress through the pressure sensor 16 and giving early warning of carbon dioxide leakage in the area. Compared with real-time monitoring of carbon dioxide content, it has obvious early warning effect.

[0036] This device combines a traditional carbon dioxide concentration monitor 22 to monitor the concentration of carbon dioxide in real time, and cooperates with the pressure exerted on the pressure sensor 16 to realize a multi-dimensional early warning function for carbon dioxide. The iron barrels 7 are set into multiple groups, which can monitor the crustal stress in multiple areas. In conjunction with the carbon dioxide concentration monitor 22 that uploads the carbon dioxide concentration in real time, the carbon dioxide leakage early warning accuracy of the device is significantly improved. When the carbon dioxide concentration monitored by the carbon dioxide concentration monitor 22 continues to increase and the pressure exerted on the pressure sensor 16 continues to increase, it can be determined that carbon dioxide leakage will occur in the warned area, thereby significantly improving the early warning accuracy of the device.

[0037] Among them, the bottom end of the connecting column 3 is fixedly installed with a bottom column 6, the bottom of the bottom column 6 is in a pointed cone shape, and the iron barrel 7 is completely located underground;

[0038] The pointed cone-shaped structure at the bottom of the bottom column 6 enables the bottom column 6 to be firmly inserted into the surface of the underground rock. The iron barrel 7 is completely buried in the deep hole excavated underground. It is tightly abutted against the deep hole underground through the rubber sleeve 8. When the crustal movement produces radial displacement on the inner wall of the deep hole, it can exert pressure on the iron barrel 7 and cause it to deform and sink inward, and reduce its inner cavity volume, forcing the transmission oil 11 to flow upward and push the piston 13 and the connecting plate 14 upward. The pressure degree is obtained by squeezing the pressure sensor 16, which determines that a relatively strong crustal movement has occurred in this area.

[0039] The outer surface of the iron barrel 7 is fixedly sleeved with a rubber sleeve 8, and both ends of the iron barrel 7 are fixedly sleeved with mounting rings 5;

[0040] The rubber sleeve 8 is responsible for protecting the outer surface of the iron barrel 7 , and is used to prevent sharp rocks that may exist on the inner wall of the deep hole from piercing the iron barrel 7 , thereby causing the device to lose its early warning function.

[0041] Among them, an air pump 17 is installed at the bottom of the inner wall of the box body 1, and the air inlet end of the air pump 17 is fixedly connected to the air collecting cover 18 located at the bottom of the box body 1. The air collecting cover 18 is trumpet-shaped, and the air outlet end of the air pump 17 is fixedly connected to a connecting pipe 19. One end of the connecting pipe 19 is connected to the separation box 20 along the tangential direction of the outer surface of the separation box 20;

[0042] The bell mouth of the air collecting hood 18 is conducive to collecting ground air on a large scale, and pumping it to the inner wall of the separation box 20 through the air pump 17 and the connecting pipe 19. The device also adds a traditional carbon dioxide concentration monitor 22 for real-time monitoring of the carbon dioxide concentration passing therethrough. The connecting pipe 19 is provided to connect the tangent part installed on the outer surface of the separation box 20, so that the air entering the inner wall of the separation box 20 can make a spiral downward motion around the inner wall of the separation box 20. The centrifugal force generated just throws the solid impurities in the air to the edge of the inner wall of the separation box 20, thereby achieving the purpose of separating impurities. The water in the air is then absorbed by the drying column 23 and the drying pad 24 located inside the separation box 20, so that the water content in the air entering the carbon dioxide concentration monitor 22 is reduced, thereby improving the real-time monitoring accuracy of carbon dioxide.

[0043] Among them, multiple sets of brackets 2 are fixedly installed on the outer surface of the box body 1, and the bottom of the bracket 2 is fixedly installed on the ground;

[0044] The bracket 2 is used to support the entire device, and the bracket 2 can be fixed to the ground by bolts and expansion screws.

[0045] The outer surface of the piston 13 is movably connected to a spring 12 located on the upper side of the inner cavity of the sealing cylinder 10. The spring 12 is isolated from the transmission oil 11 by the piston 13. The two ends of the spring 12 are elastically connected to the sealing cylinder 10 and the piston 13 respectively.

[0046] like Figure 2As shown, the spring 12 is always in a compressed state, the purpose of which is to compress the piston 13 downward so that the bottom end of the piston 13 can fit tightly with the transmission oil 11 and offset part of the crustal stress generated from the inner wall of the deep hole, thereby increasing the warning threshold of the device.

[0047] Among them, a drying column 23 is fixedly installed at the bottom of the inner wall of the separation box 20, and a drying pad 24 is fixedly installed on the inner wall of the separation box 20. The drying column 23 and the drying pad 24 are both made of solid NaOH, CaO, soda lime, solid CaCl2, and solid MgCl2;

[0048] The drying column 23 and the drying pad 24 are both made of materials with strong water absorption. When the air pump 17 absorbs moisture in the air entering the inner cavity of the separation box 20, the spirally moving air can fully contact the surface of the drying column 23 and the drying pad 24, thereby removing moisture in the air and reducing the interference of carbon dioxide during monitoring. In addition, some materials such as CaO will generate heat when absorbing water. Engineers can select the above raw materials according to actual needs.

[0049] The outer surface of the drying column 23 is provided with a plurality of contact grooves 25 at equal intervals in the vertical direction, and the axial cross-section of the contact grooves 25 is a semicircle.

[0050] like Figure 3 As shown, a plurality of groups of contact grooves 25 with equal spacing are vertically opened on the surface of the drying column 23. This design increases the contact area between the air and the drying column 23, greatly improving the water absorption capacity of the device.

[0051] The iron barrel 7 is made of stainless steel sheet iron, and the transmission oil 11 is pressurized and stored in the sealing cylinder 10, the connecting column 3 and the inner cavity of the iron barrel 7 by the spring 12 and the piston 13;

[0052] The iron barrel 7 is made of rigid material. When the crustal stress causes radial displacement in the deep hole where the iron barrel 7 is located, the surface of the iron barrel 7 will be squeezed to make it concave, reducing the volume of the inner cavity of the iron barrel 7 and pushing the transmission oil 11 upward to flow. By driving the piston 13 and the connecting plate 14 upward and squeezing the pressure sensor 16, at this time, when the pressure sensor 16 is under pressure, it can be confirmed that crustal movement has occurred in the area, and an early warning can be given that there may be a carbon dioxide leak here.

[0053] Among them, a fixing plate 4 is fixedly installed on the top of the outer surface of the connecting column 3, and the fixing plate 4 is fixedly connected to the bottom of the box body 1 through bolts;

[0054] The connecting column 3, the iron barrel 7 and the rubber sleeve 8 can be fixed to the bottom of the box body 1 through the fixing plate 4 and bolts.

[0055] Working principle:

[0056] When the device is working, first dig a deep hole in the target area. The length of the hole is greater than the length of the connecting column 3. The number of holes, that is, the arrangement method, is equivalent to the connecting column 3. Then, put the device into the dug deep hole. Figure 1 and Figure 2 As shown, multiple sets of connecting columns 3, iron barrels 7 and rubber sleeves 8 are inserted into deep holes in the ground. On the outside of the connecting columns 3 and the iron barrels 7, the rubber sleeves 8 abut against the inner wall of the deep hole to protect the surface of the iron barrels 7 and prevent sharp rocks from piercing the iron barrels 7.

[0057] Then, the air pump 17 is started, and the air at the bottom of the air collecting hood 18 is sucked into the connecting pipe 19, and then enters the inner cavity of the separation box 20 along the tangent of the separation box 20, and moves downward in a spiral around the inner wall of the separation box 20. When the air moves downward in a spiral along the inner wall of the separation box 20, centrifugal force is generated, which throws impurities (dust, suspended solids) in the air to the edge of the inner wall of the separation box 20, and falls to the bottom of the inner cavity of the separation box 20 under the action of gravity, and the separated air moves vertically upward along the middle of the separation box 20 and the outer surface of the drying column 23. When the air passes through the drying column 23 and the drying pad 24, the moisture on the surface of the air is absorbed. The separated air finally enters the carbon dioxide concentration monitor 22 along the air outlet pipe 21. At this time, the carbon dioxide content entering therein is monitored in real time by the carbon dioxide concentration monitor 22. The system is set to determine that a carbon dioxide leak occurs when the amount of carbon dioxide monitored in real time by the carbon dioxide concentration monitor 22 per unit time increases;

[0058] Finally, when the connecting column 3 goes deep into the ground, due to the movement of the earth's crust, the inner wall of the underground rock layer that contacts the iron barrel 7 and the rubber sleeve 8 will generate crustal gravity, that is, a small displacement will occur along the deep hole diameter line. At this time, since the surface of the iron barrel 7 is rigid and is fixed as a whole by the fixed plate 4 and the box body 1, the surface of the iron barrel 7 will produce a concave deformation under the action of the crustal stress, that is, the volume of the inner cavity of the iron barrel 7 is reduced. At this time, the transmission oil 11 located in the inner cavity of the sealing cylinder 10 pushes the piston 13 upward under the pressure generated by the concave inner wall of the iron barrel 7, and compresses the elastic Spring 12 (Note: at this time, spring 12 has been compressed in order to keep the bottom end of piston 13 in sealed contact with transmission oil 11), piston 13 drives connecting plate 14 to move upward and squeezes pressure sensor 16. When the pressure on pressure sensor 16 is too great, it means that strong crustal movement has occurred in the area, which can be used as an early warning of possible leakage of carbon dioxide sealed underground. If the amount of carbon dioxide monitored by carbon dioxide concentration monitor 22 increases significantly, it can be used as an accurate early warning of carbon dioxide leakage in the area.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A carbon dioxide geological storage leakage early warning device, characterized in that: include: A box body (1) is provided with a plurality of connecting columns (3) at the bottom of the box body (1), an iron barrel (7) is welded to the outer surface of the connecting column (3), a connecting hole (9) is provided on the outer surface of the connecting column (3), a sealing cylinder (10) located in the inner cavity of the box body (1) is fixedly connected to the top of the connecting column (3), a piston (13) is provided in the inner sealing sleeve of the sealing cylinder (10), a connecting plate (14) is fixedly connected to the top of the piston (13), a mounting frame (15) is fixedly installed on the outer surface of the sealing cylinder (10), a pressure sensor (16) is fixedly installed at the bottom of the upper end of the mounting frame (15), the connecting plate (14) is in contact with the pressure sensor (16), and the inner cavity of the sealing cylinder (10), the connecting column (3) and the iron barrel (7) is filled with transmission oil (11); A carbon dioxide concentration monitor (22) is arranged at the upper part of the inner cavity of the box (1), a separation box (20) is fixedly installed in the middle of the inner wall of the box (1), an air outlet pipe (21) is fixedly connected to the top of the separation box (20), and the air outlet pipe (21) is fixedly connected to the carbon dioxide concentration monitor (22); The bottom end of the connecting column (3) is fixedly mounted with a bottom column (6), the bottom of the bottom column (6) is in a pointed cone shape, the iron barrel (7) is entirely located underground, the outer surface of the piston (13) is movably sleeved with a spring (12) located on the upper side of the inner cavity of the sealing cylinder (10), the spring (12) is isolated from the transmission oil (11) by the piston (13), the two ends of the spring (12) are elastically connected to the sealing cylinder (10) and the piston (13), respectively, the iron barrel (7) is made of stainless steel sheet iron, and the transmission oil (11) is pressurized and stored in the inner cavity of the sealing cylinder (10), the connecting column (3) and the iron barrel (7) through the spring (12) and the piston (13).

2. The early warning device for carbon dioxide geological storage leakage according to claim 1, characterized in that: A rubber sleeve (8) is fixedly sleeved on the outer surface of the iron barrel (7), and mounting rings (5) are fixedly sleeved on both ends of the iron barrel (7).

3. The early warning device for carbon dioxide geological storage leakage according to claim 2, characterized in that: An air pump (17) is installed at the bottom of the inner wall of the box body (1), and the air inlet end of the air pump (17) is fixedly connected to an air collecting hood (18) located at the bottom of the box body (1), and the air collecting hood (18) is trumpet-shaped. The air outlet end of the air pump (17) is fixedly connected to a connecting pipe (19), and one end of the connecting pipe (19) is connected to the separation box (20) along the tangential direction of the outer surface of the separation box (20).

4. The early warning device for carbon dioxide geological storage leakage according to claim 3, characterized in that: Multiple groups of brackets (2) are fixedly mounted on the outer surface of the box (1), and the bottoms of the brackets (2) are fixedly mounted on the ground.

5. The early warning device for carbon dioxide geological storage leakage according to claim 4, characterized in that: A drying column (23) is fixedly installed on the bottom of the inner wall of the separation box (20), and a drying pad (24) is fixedly installed on the inner wall of the separation box (20). The drying column (23) and the drying pad (24) are both made of solid NaOH, CaO, soda lime, solid CaCl2, and solid MgCl2.

6. The early warning device for carbon dioxide geological storage leakage according to claim 5, characterized in that: The outer surface of the drying column (23) is provided with a plurality of groups of contact grooves (25) at equal intervals in the vertical direction, and the axial cross-section of the contact grooves (25) is in the shape of a semicircle.

7. The early warning device for carbon dioxide geological storage leakage according to claim 6, characterized in that: A fixing plate (4) is fixedly mounted on the top of the outer surface of the connecting column (3), and the fixing plate (4) is fixedly connected to the bottom of the box body (1) via bolts.

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