Method and equipment for detecting carbon dioxide precipitation rate

Abstract

The invention discloses a carbon dioxide precipitation rate detection method and equipment, and belongs to the field of carbon dioxide detection.The carbon dioxide precipitation rate detection equipment comprises a cover body assembly and an infrared gas analyzer, the cover body assembly comprises a first connecting cylinder and a sealing cover, and a containing cavity with one end open is formed in the sealing cover; the sealing cover is provided with an air inlet and an air outlet which are communicated with the containing cavity, one end of the first connecting cylinder extends into the containing cavity, the depth of the portion, extending into the containing cavity, of the first connecting cylinder is adjustable, the infrared gas analyzer is provided with an air inlet connector and an air outlet connector, and the air inlet connector is communicated with the air inlet through an air inlet pipe. The air outlet connector communicates with the air outlet through an air outlet pipe. The device belongs to passive monitoring, adopts the infrared gas analyzer for real-time measurement, can effectively reflect the release rule of carbon dioxide in soil according to the linear change of carbon dioxide concentration increase, and has the advantages of adjustable volume of the cover body assembly, high applicability, simple equipment structure and low use cost.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide detection, and in particular to a method and device for detecting carbon dioxide evolution rate. Background Art

[0002] With the development of carbon dioxide capture, fixation and sealing technology, geological utilization and geological storage are currently more common CCUS (Carbon Capture, Utilization and Storage) technologies. Carbon dioxide precipitation detection technology can reflect the carbon dioxide precipitation rate in natural strata and soil in the environment, determine the carbon dioxide release in strata, ores, waste residues and other areas in specific areas, conduct background surveys on carbon dioxide release rates in natural strata and soils, and evaluate the carbon fixation effects of geological utilization and geological storage projects, as well as the carbon dioxide release in ores and waste residues in storage yards.

[0003] A device for measuring carbon dioxide flux on the soil surface in the related technology includes an open cavity, a filter and a carbon dioxide measuring instrument. The open cavity is arranged on the soil surface. Under the action of a built-in pump of the carbon dioxide measuring instrument, the open cavity, the filter and the carbon dioxide measuring instrument form a closed gas flow path to record the carbon dioxide concentration measured by the carbon dioxide measuring instrument at multiple different periods. The built-in pump of the carbon dioxide measuring instrument extracts gas, which is easy to cause interference and affect the detection result. The volume of the open cavity is fixed, and open cavities of different volumes need to be replaced for different measurement requirements. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a method and device for detecting carbon dioxide evolution rate, which does not use a built-in pump and belongs to passive monitoring, can more effectively reflect the change of carbon dioxide concentration in the mask assembly, and also makes the reaction of carbon dioxide flux or carbon dioxide evolution rate more objective and effective, avoiding the interference that may be caused by the vacuum pump, and the depth of the first connecting tube extending into the accommodating cavity can be adjusted, so that the volume of the mask assembly can be adjusted, and the applicability is strong.

[0005] A carbon dioxide evolution rate detection device according to an embodiment of the present invention includes:

[0006] The cover assembly comprises a first connecting tube and a sealing cover, wherein a receiving cavity with an open end is provided in the sealing cover, an air inlet hole and an air outlet hole communicating with the receiving cavity are provided on the sealing cover, one end of the first connecting tube extends into the receiving cavity, and the depth of the first connecting tube extending into the receiving cavity is adjustable;

[0007] The infrared gas analyzer comprises an air inlet interface and an air outlet interface, wherein the air inlet interface is connected to the air inlet hole through an air inlet pipe, and the air outlet interface is connected to the air outlet hole through an air outlet pipe.

[0008] The carbon dioxide evolution rate detection device according to the embodiment of the present invention has at least the following beneficial effects:

[0009] When in use, the first connecting tube covers the surface of the object to be measured, and the volume of the cover assembly can be adjusted by adjusting the depth of the first connecting tube inserted into the accommodating cavity. In the present application scheme, the infrared gas analyzer can measure the concentration of carbon dioxide in the air in the cover assembly in real time, and calculate the carbon dioxide precipitation rate on the surface of the object covered by the cover assembly in conjunction with the measurement formula. No built-in pump is provided, which belongs to passive monitoring, and can more effectively reflect the change of carbon dioxide concentration in the cover assembly, and also make the reaction of carbon dioxide flux or carbon dioxide precipitation rate more objective and effective, avoiding the interference that may be caused by the vacuum pump. The depth of the first connecting tube inserted into the accommodating cavity can be adjusted, so that the volume of the cover assembly can be adjusted, and it has strong applicability.

[0010] Using infrared gas analyzer for real-time measurement, according to the linear change of carbon dioxide concentration growth, it can effectively reflect the release law of carbon dioxide in soil, and can effectively reflect the release of carbon dioxide from various surfaces such as soil, ore piles, waste slag piles, etc., to provide scientific data for mastering the carbon dioxide release of related media. At the same time, the equipment has a simple structure, low cost, short measurement time, and can collect a large amount of data in a short time to avoid errors caused by operation. Because it reflects the growth trend, the data is more scientific and reasonable.

[0011] According to some embodiments of the present invention, a first external thread is provided on the first connecting tube, a threaded portion is protruding on the inner wall of the open end of the sealing cover, a first internal thread is provided on the threaded portion, and the first external thread is adaptably connected to the first internal thread.

[0012] According to some embodiments of the present invention, a second external thread is provided on the first connecting tube, the second external thread and the first external thread are spaced apart along the axial direction of the first connecting tube, the second external thread is adapted to be connected with the first internal thread, and the first external thread and the second external thread are protruding from the surface of the first connecting tube.

[0013] According to some embodiments of the present invention, the sealing cover is provided with a mounting hole penetrating the threaded portion, a positioning bead is provided in the mounting hole, the spherical body of the positioning bead faces the inner side of the sealing cover, and the first external thread is provided with a first positioning notch for the positioning bead to extend into.

[0014] According to some embodiments of the present invention, one end of the first connecting tube extending into the sealing cover is connected to a sealing assembly, and the sealing assembly includes a plurality of sealing rings, the plurality of sealing rings are installed on the first connecting tube, the plurality of sealing rings are arranged at intervals along the axial direction of the first connecting tube, and the plurality of sealing rings abut against the inner wall of the accommodating cavity.

[0015] According to some embodiments of the present invention, the sealing assembly further includes a plurality of gaskets, the plurality of gaskets and the plurality of sealing rings are alternately arranged, the gasket is provided with a first connecting hole for a first screw to pass through, the sealing ring is provided with a second connecting hole for the first screw to pass through, one end of the first connecting tube is provided with a first threaded hole for the first screw to pass through, the plurality of gaskets and the plurality of sealing rings are detachably connected to the first connecting tube via a first screw, and the gasket is spaced apart from the sealing cover.

[0016] According to some embodiments of the present invention, the sealing cover includes a second connecting tube and an upper cover, the upper cover is detachably connected to one end of the second connecting tube, one end of the first connecting tube extends into the second connecting tube, a second internal thread is provided on the upper cover, and a third external thread is provided at one end of the second connecting tube away from the first connecting tube, the second internal thread is adapted to be connected to the third external thread, and a sealing ring is connected between the upper cover and the second connecting tube.

[0017] According to some embodiments of the present invention, a handle is provided on the upper cover, a second threaded hole for a second screw to pass through is provided on the upper cover, a limiting groove for the second screw to pass through is provided on the second connecting tube, and the second screw is used to limit the rotation of the upper cover relative to the second connecting tube.

[0018] According to some embodiments of the present invention, the carbon dioxide evolution rate detection device also includes a counterweight ring, a third internal thread is arranged on the inner side of the counterweight ring, and a fourth external thread is arranged on the end of the first connecting tube away from the sealing cover, the fourth external thread is adapted to be connected with the third internal thread, and the outer diameter of the fourth external thread is smaller than the outer diameter of the first connecting tube.

[0019] The method for detecting carbon dioxide evolution rate according to an embodiment of the present invention comprises the following steps:

[0020] S1: Cover the cover assembly at the preset measuring position and depth of the object to be measured, and cover the outer side of the bottom of the cover assembly with soil for sealing;

[0021] S2: Infrared gas analyzer detects the concentration of carbon dioxide in the hood assembly;

[0022] S3: Calculate the carbon dioxide release rate CO on the surface of the object covered by the cover assembly 2析 :

[0023]

[0024] Wherein, V is the volume inside the mask assembly, S is the covered surface area of ​​the mask assembly, C1 is the carbon dioxide concentration in the air inside the mask assembly during the first detection, C2 is the carbon dioxide concentration in the air inside the mask assembly during the second detection, and ΔT is the time interval between the two detections.

[0025] The carbon dioxide evolution rate detection method according to the embodiment of the present invention has at least the following beneficial effects:

[0026] When in use, the first connecting tube covers the surface of the object to be measured, and the volume of the cover assembly can be adjusted by adjusting the depth of the first connecting tube inserted into the accommodating cavity. In the present application scheme, the infrared gas analyzer can measure the concentration of carbon dioxide in the air in the cover assembly in real time, and calculate the carbon dioxide precipitation rate on the surface of the object covered by the cover assembly in conjunction with the measurement formula. No built-in pump is provided, which belongs to passive monitoring, and can more effectively reflect the change of carbon dioxide concentration in the gas collection hood, and also make the reaction of carbon dioxide flux or carbon dioxide precipitation rate more objective and effective, avoiding the interference that may be caused by the vacuum pump. The depth of the first connecting tube inserted into the accommodating cavity can be adjusted, so that the volume of the cover assembly can be adjusted, and it has strong applicability.

[0027] Using infrared gas analyzer for real-time measurement, according to the linear change of carbon dioxide concentration growth, it can effectively reflect the release law of carbon dioxide in soil, and can effectively reflect the release of carbon dioxide from various surfaces such as soil, ore piles, waste slag piles, etc., to provide scientific data for mastering the carbon dioxide release of related media. At the same time, the equipment has a simple structure, low cost, short measurement time, and can collect a large amount of data in a short time to avoid errors caused by operation. Because it reflects the growth trend, the data is more scientific and reasonable.

[0028] Additional aspects and advantages of the invention will be set forth in part in the description which follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0030] Figure 1 It is a structural schematic diagram of a carbon dioxide evolution rate detection device according to an embodiment of the present invention;

[0031] Figure 2 A cross-sectional view of a cover assembly of a carbon dioxide evolution rate detection device according to an embodiment of the present invention;

[0032] Figure 3 This is a structural schematic diagram of a first connecting tube of a carbon dioxide evolution rate detection device according to an embodiment of the present invention;

[0033] Figure 4 for Figure 3 A magnified view of middle;

[0034] Figure 5 This is a structural schematic diagram of a second connecting tube of a carbon dioxide evolution rate detection device according to an embodiment of the present invention;

[0035] Figure 6 It is a structural schematic diagram of a sealing component of a carbon dioxide evolution rate detection device according to an embodiment of the present invention;

[0036] Figure 7 for Figure 6 Enlarged view of middle B;

[0037] Figure 8 It is a schematic structural diagram of the upper cover of the carbon dioxide evolution rate detection device according to an embodiment of the present invention.

[0038] Figure Number:

[0039] 100, cover assembly; 110, first connecting tube; 111, first external thread; 1111, first positioning notch; 112, second external thread; 113, first threaded hole; 114, fourth external thread; 120; sealing cover; 121, accommodating cavity; 122, threaded portion; 1221, first internal thread; 1222, mounting hole; 123, second connecting tube; 1231, third external thread; 124, upper cover; 1241, second internal thread; 1242, sealing ring; 1243, handle; 130, sealing assembly; 131, sealing ring; 132, gasket; 1321, first connecting hole; 140, counterweight ring; 141, through hole;

[0040] 200. Infrared gas analyzer; 210. Air inlet pipe; 220. Air outlet pipe. DETAILED DESCRIPTION

[0041] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] See also Figure 1 , Figure 2 and Figure 3 The carbon dioxide evolution rate detection device according to the embodiment of the present invention comprises a cover assembly 100 and an infrared gas analyzer 200, wherein the cover assembly 100 comprises a first connecting tube 110 and a sealing cover 120. A containing cavity 121 is provided in the sealing cover 120, and the lower end of the containing cavity 121 is open. An air inlet and an air outlet are provided on the sealing cover 120, and the air inlet and the air outlet are connected to the containing cavity 121. One end of the first connecting tube 110 extends into the containing cavity 121, and the depth of the first connecting tube 110 extending into the containing cavity 121 is adjustable. The infrared gas analyzer 200 has an air inlet interface and an air outlet interface, wherein the air inlet interface is connected to the air inlet through an air inlet pipe 210, and the air outlet interface is connected to the air outlet through an air outlet pipe 220.

[0045] When in use, the first connecting tube 110 covers the surface of the object to be measured, and the volume of the cover assembly 100 can be adjusted by adjusting the depth of the first connecting tube 110 extending into the accommodating chamber 121. In the present application scheme, the infrared gas analyzer 200 can measure the concentration of carbon dioxide in the air in the cover assembly 100 in real time, and calculate the carbon dioxide precipitation rate on the surface of the object covered by the cover assembly 100 in conjunction with the measurement formula. No built-in pump is set, which belongs to passive monitoring, can more effectively reflect the change of carbon dioxide concentration in the cover assembly 100, and also make the reaction of carbon dioxide flux or carbon dioxide precipitation rate more objective and effective, avoiding the interference that may be caused by the vacuum pump. The depth of the first connecting tube 110 extending into the accommodating chamber 121 can be adjusted, so that the volume of the cover assembly 100 can be adjusted, and it has strong applicability.

[0046] The infrared gas analyzer 200 is used for real-time measurement. According to the linear change of the growth of carbon dioxide concentration, it can effectively reflect the release law of carbon dioxide in the soil, and can effectively reflect the release of carbon dioxide from various surfaces such as soil, ore piles, and waste slag piles, providing scientific data for mastering the carbon dioxide release of related media. At the same time, the equipment has a simple structure, low cost, and short measurement time. It can collect a large amount of data in a short time and avoid errors caused by operation. Because it reflects the growth trend, the data is more scientific and reasonable.

[0047] In some embodiments, see Figure 2 , Figure 3 and Figure 5 The first connecting tube 110 is provided with a first external thread 111, and a threaded portion 122 is protrudingly provided on the inner wall of the open end of the sealing cover 120, and a first internal thread 1221 is provided on the threaded portion 122, and the first external thread 111 is connected with the first internal thread 1221 in an adaptable manner. The first connecting tube 110 and the sealing cover 120 are threadedly connected, and the sealing cover 120 is fixed and the first connecting tube 110 is rotated, so that the depth of the first connecting tube 110 extending into the accommodating cavity 121 can be adjusted, and then the volume size of the cover assembly 100 can be adjusted. The first connecting tube 110 is installed on the surface of an object, and the first external thread 111 is connected with the first internal thread 1221 in an adaptable manner, so that the first connecting tube 110 can better support the sealing cover 120.

[0048] In some embodiments, see Figure 2 , Figure 3 and Figure 5, the first connecting tube 110 is provided with a second external thread 112, and the second external thread 112 is adapted and connected with the first internal thread 1221. The second external thread 112 and the first external thread 111 are arranged at intervals along the axial direction of the first connecting tube 110, and the first external thread 111 and the second external thread 112 are arranged protruding from the surface of the first connecting tube 110. The first external thread 111 and the second external thread 112 are arranged protruding from the first connecting tube 110, so that when the threaded portion 122 is located between the first external thread 111 and the second external thread 112, it can move along the axial direction of the first connecting tube 110, thereby adjusting the depth of the first connection extending into the accommodating cavity 121 more quickly, thereby adjusting the volume of the cover assembly 100 more quickly.

[0049] In some embodiments, see Figure 3 , Figure 4 and Figure 5 , the sealing cover 120 is provided with a mounting hole 1222, the mounting hole 1222 passes through the threaded portion 122, and a positioning bead is provided in the mounting hole 1222, and the sphere of the positioning bead faces the inner side of the sealing cover 120. The first external thread 111 is provided with a first positioning notch 1111, and the first positioning notch 1111 is used for the positioning bead to extend into. The second external thread 112 is provided with a second positioning notch, and the second positioning notch is used for the positioning bead to extend into. By setting the positioning bead for positioning, it is convenient to determine the volume of the cover assembly 100 (a volume when the first internal thread 1221 is connected to the first external thread 111, a volume when the first internal thread 1221 is connected to the second external thread 112, and an external thread can also be added to the first connecting tube 110), which is convenient for subsequent measurement and calculation. The positioning bead is inserted into the first positioning notch 1111, and the corresponding volume of the cover assembly 100 is measured; the positioning bead is inserted into the second positioning notch, and the corresponding volume of the cover assembly 100 is measured.

[0050] The first external thread 111 is located in the middle of the first connecting tube 110 along the axial direction of the first connecting tube 110, and the second external thread 112 is located at one end of the first connecting tube 110 extending into the sealing cover 120. The volume range of the cover assembly 100 is generally from a few liters to 200L. The first external thread 111 and the second external thread 112 are arranged on the first connecting tube 110, so that the volume of the cover assembly 100 can be adjusted within a fixed range. When the first internal thread 1221 is connected to the first external thread 111, and the positioning bead is inserted into the first positioning notch 1111, the volume inside the cover assembly 100 is 100L; when the first internal thread 1221 is connected to the second external thread 112, and the positioning bead is inserted into the second positioning notch, the volume inside the cover assembly 100 is 200L.

[0051] In some embodiments, see Figure 2 , Figure 6 and Figure 7The end of the first connecting tube 110 extending into the sealing cover 120 is connected with a sealing assembly 130, and the sealing assembly 130 includes a plurality of sealing rings 131, which are installed on the first connecting tube 110, and the plurality of sealing rings 131 are arranged at intervals along the axial direction of the first connecting tube 110, and the plurality of sealing rings 131 abut against the inner wall of the accommodating cavity 121. The plurality of sealing rings 131 are installed on the first connecting tube 110, so as to improve the sealing effect between the first connecting tube 110 and the sealing cover 120.

[0052] In some embodiments, see Figure 3 , Figure 6 and Figure 7 The sealing assembly 130 further includes a plurality of gaskets 132, and the plurality of gaskets 132 and the plurality of sealing rings 131 are arranged alternately. The gasket 132 is provided with a first connection hole 1321, and the sealing ring 131 is provided with a second connection hole. One end of the first connecting tube 110 is provided with a first threaded hole 113, and the first screw passes through the first connection hole 1321 and the second connection hole and is screwed into the first threaded hole 113. The plurality of gaskets 132 and the plurality of sealing rings 131 are detachably connected to the first connecting tube 110 through the first screw, and the gasket 132 is spaced apart from the sealing cover 120. The gasket 132 can protect the sealing ring 131 and ensure that the sealing ring 131 is smoothly installed on the first connecting tube 110. The gasket 132 can separate multiple sealing rings 131 to ensure that the contact ends of the sealing rings 131 and the inner wall of the sealing cover 120 have room for movement, thereby reducing the friction between the sealing assembly 130 and the inner wall of the sealing cover 120, and ensuring that the first connecting tube 110 moves smoother relative to the sealing cover 120 along the radial direction of the first connecting tube 110.

[0053] In some embodiments, see Figure 2 , Figure 5 and Figure 8 The sealing cover 120 includes a second connecting tube 123 and an upper cover 124, and the upper cover 124 is detachably connected to one end of the second connecting tube 123. One end of the first connecting tube 110 extends into the second connecting tube 123, and a second internal thread 1241 is provided on the upper cover 124. The end of the second connecting tube 123 away from the first connecting tube 110 is provided with a third external thread 1231, and the second internal thread 1241 is connected with the third external thread 1231 in an adaptable manner, and a sealing ring 1242 is connected between the upper cover 124 and the second connecting tube 123. The sealing cover 120 is set to be split, which is convenient for the separation between the first connecting tube 110 and the sealing cover 120. During installation, the first connecting tube 110 is first connected to the second connecting tube 123, and then the upper cover 124 is installed at one end of the second connecting tube 123.

[0054] In some embodiments, a handle 1243 is provided on the upper cover 124, a second threaded hole is provided on the upper cover 124, a limiting groove is provided on the second connecting tube 123, and the second screw passes through the second threaded hole and extends into the limiting groove, thereby limiting the rotation of the upper cover 124 relative to the second connecting tube 123. When it is necessary to adjust the depth of the first connecting tube 110 extending into the accommodating cavity 121, the handle 1243 is held and the first connecting tube 110 is rotated.

[0055] In some embodiments, see Figure 1 , Figure 2 and Figure 3 The carbon dioxide evolution rate detection device further includes a weight ring 140, and a third internal thread is arranged inside the weight ring 140. A fourth external thread 114 is arranged at one end of the first connecting tube 110 away from the sealing cover 120, and the fourth external thread 114 is adapted to be connected with the third internal thread, and the outer diameter of the fourth external thread 114 is smaller than the outer diameter of the first connecting tube 110. The outer diameter of the fourth external thread 114 is arranged to be smaller than the outer diameter of the first connecting tube 110, so that the sealing assembly 130 can be installed on the first connecting tube 110 first, and then the lower end of the first connecting tube 110 is extended from the upper end of the second connecting tube 123 and screwed out from the lower end of the second connecting tube 123.

[0056] The weight ring 140 can improve the stability of the cover assembly 100 and prevent the cover assembly 100 from tipping over. A through hole 141 is provided on the configuration ring, and an anchor nail can be used to pass through the through hole 141 to anchor the weight ring 140.

[0057] In some embodiments, see Figure 1 , Figure 2 and Figure 3 The first connecting tube 110, the second connecting tube 123 and the upper cover 124 are all made of a material that is airtight, does not absorb carbon dioxide, and does not dissolve carbon dioxide.

[0058] The method for detecting carbon dioxide evolution rate according to an embodiment of the present invention comprises the following steps:

[0059] S1: Cover the cover assembly 100 at a preset measuring position and depth of the object to be measured, and cover the outer side of the bottom of the cover assembly 100 with soil for sealing;

[0060] S2: The infrared gas analyzer 200 detects the concentration of carbon dioxide in the cover assembly 100;

[0061] S3: Calculate the carbon dioxide release rate CO of the surface of the object covered by the cover assembly 100 2析 :

[0062]

[0063] Wherein, V is the volume inside the mask assembly 100, S is the covered surface area of ​​the mask assembly 100, C1 is the carbon dioxide concentration in the air inside the mask assembly 100 during the first detection, C2 is the carbon dioxide concentration in the air inside the mask assembly 100 during the second detection, and ΔT is the time interval between the two detections.

[0064] When in use, the first connecting tube 110 covers the surface of the object to be measured, and the volume of the cover assembly 100 can be adjusted by adjusting the depth of the first connecting tube 110 extending into the accommodating chamber 121. In the present application scheme, the infrared gas analyzer 200 can measure the concentration of carbon dioxide in the air in the cover assembly 100 in real time, and calculate the carbon dioxide precipitation rate on the surface of the object covered by the cover assembly 100 in conjunction with the measurement formula. No built-in pump is set, which belongs to passive monitoring, can more effectively reflect the change of carbon dioxide concentration in the gas collection hood, and also make the reaction of carbon dioxide flux or carbon dioxide precipitation rate more objective and effective, avoiding the interference that may be caused by the vacuum pump. The depth of the first connecting tube 110 extending into the accommodating chamber 121 can be adjusted, so that the volume of the cover assembly 100 can be adjusted, and it has strong applicability.

[0065] The infrared gas analyzer 200 is used for real-time measurement. According to the linear change of the growth of carbon dioxide concentration, it can effectively reflect the release law of carbon dioxide in the soil, and can effectively reflect the release of carbon dioxide from various surfaces such as soil, ore piles, and waste slag piles, providing scientific data for mastering the carbon dioxide release of related media. At the same time, the equipment has a simple structure, low cost, and short measurement time. It can collect a large amount of data in a short time and avoid errors caused by operation. Because it reflects the growth trend, the data is more scientific and reasonable.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0067] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A carbon dioxide evolution rate detection device, characterized in that: include: The cover assembly comprises a first connecting tube and a sealing cover, wherein a receiving cavity with an open end is provided in the sealing cover, an air inlet hole and an air outlet hole communicating with the receiving cavity are provided on the sealing cover, one end of the first connecting tube extends into the receiving cavity, and the depth of the first connecting tube extending into the receiving cavity is adjustable; The infrared gas analyzer comprises an air inlet interface and an air outlet interface, wherein the air inlet interface is connected to the air inlet hole through an air inlet pipe, and the air outlet interface is connected to the air outlet hole through an air outlet pipe.

2. The carbon dioxide evolution rate detection device according to claim 1, characterized in that: The first connecting tube is provided with a first external thread, the inner wall of the open end of the sealing cover is protrudingly provided with a threaded portion, the threaded portion is provided with a first internal thread, and the first external thread is adapted to be connected with the first internal thread.

3. The carbon dioxide evolution rate detection device according to claim 2, characterized in that: The first connecting tube is provided with a second external thread, the second external thread and the first external thread are spaced apart along the axial direction of the first connecting tube, the second external thread is adapted to be connected with the first internal thread, and the first external thread and the second external thread are protruding from the surface of the first connecting tube.

4. The carbon dioxide evolution rate detection device according to claim 2, characterized in that: The sealing cover is provided with a mounting hole penetrating the threaded portion, a positioning bead is provided in the mounting hole, the sphere of the positioning bead faces the inner side of the sealing cover, and the first external thread is provided with a first positioning notch for the positioning bead to extend into.

5. The carbon dioxide evolution rate detection device according to claim 1, characterized in that: One end of the first connecting tube extending into the sealing cover is connected to a sealing assembly, and the sealing assembly includes a plurality of sealing rings, which are installed on the first connecting tube and are spaced apart along the axial direction of the first connecting tube, and abut against the inner wall of the accommodating cavity.

6. The carbon dioxide evolution rate detection device according to claim 5, characterized in that: The sealing assembly also includes a plurality of gaskets, and the plurality of gaskets and the plurality of sealing rings are arranged alternately. The gasket is provided with a first connecting hole for a first screw to pass through, and the sealing ring is provided with a second connecting hole for the first screw to pass through. One end of the first connecting tube is provided with a first threaded hole for the first screw to pass through. The plurality of gaskets and the plurality of sealing rings are detachably connected to the first connecting tube by a first screw, and the gasket is spaced apart from the sealing cover.

7. The carbon dioxide evolution rate detection device according to claim 1, characterized in that: The sealing cover includes a second connecting tube and an upper cover, wherein the upper cover is detachably connected to one end of the second connecting tube, one end of the first connecting tube extends into the second connecting tube, a second internal thread is arranged on the upper cover, and a third external thread is arranged at one end of the second connecting tube away from the first connecting tube, the second internal thread is adapted to be connected with the third external thread, and a sealing ring is connected between the upper cover and the second connecting tube.

8. The carbon dioxide evolution rate detection device according to claim 7, characterized in that: The upper cover is provided with a handle, the upper cover is provided with a second threaded hole for a second screw to pass through, the second connecting tube is provided with a limiting groove for a second screw to pass through, and the second screw is used to limit the upper cover from rotating relative to the second connecting tube.

9. The carbon dioxide evolution rate detection device according to claim 1, characterized in that: It also includes a balancing ring, a third internal thread is arranged on the inner side of the balancing ring, and a fourth external thread is arranged on the end of the first connecting tube away from the sealing cover. The fourth external thread is adapted to be connected with the third internal thread, and the outer diameter of the fourth external thread is smaller than the outer diameter of the first connecting tube.

10. The method for detecting carbon dioxide evolution rate according to claim 1, applied to the device for detecting carbon dioxide evolution rate according to any one of claims 1 to 9, characterized in that: The steps include: S1: Cover the cover assembly at the preset measurement position and depth of the object to be measured, and cover the outer side of the bottom of the cover assembly with soil for sealing; S2: Infrared gas analyzer detects the concentration of carbon dioxide in the hood assembly; S3: Calculate the carbon dioxide release rate CO on the surface of the object covered by the cover assembly 2析 : Wherein, V is the volume inside the mask assembly, S is the covered surface area of ​​the mask assembly, C1 is the carbon dioxide concentration in the air inside the mask assembly during the first detection, C2 is the carbon dioxide concentration in the air inside the mask assembly during the second detection, and ΔT is the time interval between the two detections.

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