Carbon dioxide monitoring system and method for adsorption-method carbon capture device

Abstract

The invention provides a carbon dioxide monitoring system and method for an adsorption method carbon capture device, and relates to the technical field of carbon capture. The carbon dioxide monitoring system comprises: a pretreatment unit for filtering and drying carbon dioxide flowing through the pretreatment unit to form a to-be-detected sample gas; the regulation and control unit is used for cutting off or communicating the carbon dioxide conveying pipe and the pretreatment unit; the analysis unit is used for detecting the concentration of carbon dioxide in the to-be-detected sample gas and the standard sample gas; the calibration unit is used for storing the standard sample gas and conveying the standard sample gas to the analysis unit; the control unit, the preprocessing unit, the regulation and control unit and the analysis unit are in signal connection and used for controlling starting and stopping of the preprocessing unit, the regulation and control unit and the analysis unit. The carbon dioxide monitoring system and method provided by the invention solve the problems that in the prior art, carbon dioxide in flue gas is not monitored in the carbon capture process, and an existing carbon dioxide monitoring device is delayed in analysis result and low in accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon capture, and in particular to a carbon dioxide monitoring system for an adsorption carbon capture device and a carbon dioxide monitoring method for an adsorption carbon capture device. Background Art

[0002] At present, the state does not explicitly require that CO 2 Some existing power plants have independently added CO 2 The monitoring is mainly used for carbon emission monitoring and non-carbon capture production process monitoring. Carbon emission monitoring mainly uses the complete extraction method CEMS system to monitor CO in flue gas. 2 Monitor. The flue gas is extracted from the sampling port through the sampling pump in the sample gas extraction system, which is negative pressure sampling. It is then sent to the pretreatment system through the sampling pipeline with electric heating for condensation, drying, filtration and dust removal to ensure that the gas entering the analyzer is clean, and then the analyzer completes the component analysis. The analysis cabinet is installed in the analysis room. The location of the small room is far away from the sampling port, so the sampling pipeline is relatively long. The specification requires no more than 70 meters, and the actual project is usually 50~60 meters. The existing technology has the characteristics of long sampling path, electric heating throughout the process, and complex pretreatment system, which makes it easy for the analysis results to be delayed, the accuracy to be reduced, the system to have many fault points, the maintenance volume to be large, and the construction and operation costs to be high. Negative pressure sampling is prone to air leakage, and it is difficult to detect and supervise in time, thereby introducing measurement errors and reducing the accuracy of system measurement and analysis.

[0003] Therefore, there is an urgent need for a device that can solve at least one of the above problems. Summary of the invention

[0004] The purpose of the embodiments of the present invention is to provide a carbon dioxide monitoring system and method for an adsorption carbon capture device, which is used to solve the problem that the carbon dioxide in the flue gas is not monitored during the carbon capture process in the prior art, and the existing carbon dioxide monitoring devices have delayed analysis results and low accuracy.

[0005] In order to achieve the above object, the present invention provides a carbon dioxide monitoring system for an adsorption carbon capture device, the carbon dioxide monitoring system comprising: A pretreatment unit connected to the carbon dioxide delivery pipe of the carbon capture device, used for filtering and drying the carbon dioxide flowing through the pretreatment unit to form a sample gas to be tested; a control unit, disposed between the pretreatment unit and the carbon dioxide delivery pipe, for cutting off or restoring the connection between the carbon dioxide delivery pipe and the pretreatment unit; An analysis unit connected to the sample gas output end of the pre-processing unit, the analysis unit is used to detect the carbon dioxide concentration in the sample gas to be tested and the carbon dioxide concentration in the standard sample gas; The calibration unit is connected to the sample gas inlet end of the analysis unit and is used to store the standard sample gas and deliver the standard sample gas to the analysis unit.

[0006] A control unit is used to control the opening and closing of the preprocessing unit, the regulating unit and the analyzing unit.

[0007] Specifically, the pretreatment unit includes: a filter and a dryer; The filter is used to filter impurities in the carbon dioxide entering the pretreatment unit; The dryer is used to dry the carbon dioxide after removing impurities.

[0008] Specifically, the control unit includes: an electrically controlled switch valve; The electrically controlled switch valve is arranged between the pre-processing unit and the carbon dioxide delivery pipe, and is connected to the control unit by signal; The control unit is also used to control the electric-controlled switch valve to open or close, so as to cut off or restore the communication relationship between the carbon dioxide delivery pipe and the pretreatment unit.

[0009] Specifically, the control unit further includes: a pressure regulating valve; The pressure regulating valve is arranged between the electric-controlled switch valve and the pre-processing unit, and is used to regulate the pressure of the carbon dioxide entering the pre-processing unit.

[0010] Specifically, the analysis unit includes: an analyzer; The analyzer is connected to the sample gas output end of the pre-processing unit and is used to detect the concentration of carbon dioxide in the sample gas to be tested and the concentration of carbon dioxide in the standard sample gas.

[0011] Specifically, the analysis unit further includes: a flow regulator and a reversing valve; The flow regulator is arranged between the pre-processing unit and the analyzer, and is used to adjust the flow of the sample gas to be tested entering the analyzer; The reversing valve is arranged between the flow regulator and the analyzer and is connected to the standard sample gas output end of the calibration unit. The reversing valve is used to cut off or restore the communication relationship between the analyzer and the pretreatment unit, and is also used to cut off or restore the communication relationship between the analyzer and the calibration unit (4).

[0012] Specifically, the carbon dioxide monitoring system further includes: a pressure reducing device; The pressure reducing device is arranged between the reversing valve and the calibration unit, and is used for adjusting the pressure of the standard sample gas entering the analyzer.

[0013] Another aspect of the present invention provides a carbon dioxide monitoring method for an adsorption carbon capture device, based on any of the above carbon dioxide monitoring systems, the carbon dioxide monitoring method comprising: Filtering and drying carbon dioxide in a carbon dioxide delivery pipe from a carbon capture device to form a sample gas to be tested; Detecting the carbon dioxide concentration in the sample gas in real time by using an analysis unit; After the sample gas to be tested is detected by the analysis unit for a period of time, the standard sample gas is delivered to the analysis unit through the calibration unit at a preset time point, and the carbon dioxide concentration of the standard sample gas is detected by the analysis unit; The analysis unit is calibrated by comparing the carbon dioxide concentration of the standard sample gas detected by the analysis unit with the carbon dioxide concentration of the sample gas to be tested.

[0014] Specifically, the pressure of carbon dioxide is adjusted before filtering and drying carbon dioxide in a carbon dioxide delivery pipe from a carbon capture device.

[0015] Specifically, the pressure of the sample gas to be tested entering the calibration unit is adjusted.

[0016] The present invention provides a carbon dioxide monitoring system for an adsorption carbon capture device, wherein a control unit controls the opening and closing of a pretreatment unit, an analysis unit and a control unit. When detecting the carbon dioxide concentration in a carbon dioxide delivery pipe, the control unit controls the control unit to open, and the carbon dioxide in the carbon dioxide delivery pipe enters the pretreatment unit through the control unit, and the carbon dioxide is filtered and dried by the pretreatment unit to form a sample gas to be tested. After the sample gas to be tested enters the analysis unit, the analysis unit detects the carbon dioxide concentration in the sample gas to be tested. After monitoring for a period of time, the analysis unit stops detecting the sample gas to be tested, and the control unit controls the calibration unit to open, so that the standard sample gas of the calibration unit enters the analysis unit, and the carbon dioxide concentration in the standard sample gas is detected by the analysis unit, and the carbon dioxide concentration of the standard sample gas is compared with the carbon dioxide concentration of the sample gas to be tested to determine the detection accuracy of the analysis unit, and the analysis unit is calibrated according to the detection result of the standard sample gas, so that the carbon dioxide concentration detected by the analysis unit can be accurate. The carbon dioxide monitoring system and method for an adsorption carbon capture device provided by the present invention reduce the risk of leakage of carbon dioxide that may exist during the detection process, improve detection accuracy, reduce operation and maintenance costs, shorten the detection process of the sample gas to be tested, and improve the detection speed, thereby solving the problem that the carbon dioxide in the flue gas is not monitored during the carbon capture process in the prior art, and the existing carbon dioxide monitoring devices have delayed analysis results and low accuracy.

[0017] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. In the accompanying drawings: Figure 1 It is a structural schematic diagram of a carbon dioxide monitoring system for an adsorption carbon capture device provided in an embodiment of the present invention.

[0019] Description of Reference Numerals 1-pretreatment unit; 2-regulation unit; 3-analysis unit; 4-calibration unit; 5-control unit; 6-pressure reducing device; 11-filter; 12-dryer; 21-electrically controlled switch valve; 22-pressure regulating valve; 31-analyzer; 32-flow regulator; 33-reversing valve. DETAILED DESCRIPTION

[0020] The specific implementation of the embodiment of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the present invention, and is not used to limit the embodiment of the present invention.

[0021] Figure 1 The diagram is a schematic diagram of the structure of the carbon dioxide monitoring system used in the adsorption carbon capture device. Figure 1 As shown, the present invention provides a carbon dioxide monitoring system for an adsorption carbon capture device, the carbon dioxide monitoring system comprising: The pretreatment unit 1 is connected to the carbon dioxide delivery pipe of the carbon capture device and is used to filter and dry the carbon dioxide flowing through the pretreatment unit 1 to form a sample gas to be tested; A control unit 2, disposed between the pretreatment unit 1 and the carbon dioxide delivery pipe, for cutting off or restoring the connection between the carbon dioxide delivery pipe and the pretreatment unit 1; An analysis unit 3, connected to the sample gas output end of the preprocessing unit 1, and used for detecting the carbon dioxide concentration in the sample gas to be tested and the carbon dioxide concentration in the standard sample gas; The calibration unit 4 is connected to the sample gas inlet end of the analysis unit 3 and is used to store the standard sample gas and deliver the standard sample gas to the analysis unit 3; The control unit 5 is connected to the preprocessing unit 1, the regulating unit 2 and the analyzing unit 3 by signals, and is used to control the opening and closing of the preprocessing unit 1, the regulating unit 2 and the analyzing unit 3.

[0022] The carbon dioxide monitoring system for an adsorption carbon capture device provided by the present invention, when detecting the concentration of carbon dioxide transported in the carbon dioxide transport pipe of the carbon capture device, the control unit 5 controls the control unit 2 to start, so that the pretreatment unit 1 is connected with the carbon dioxide transport pipe. At this time, the carbon dioxide in the carbon dioxide transport pipe enters the pretreatment unit 1 after passing through the control unit 2, and the control unit 5 controls the pretreatment unit 1 to start, and the pretreatment unit 1 filters and dries the entered carbon dioxide. The carbon dioxide after filtration and drying becomes a clean sample gas to be tested, and the sample gas to be tested enters the analysis unit 3 to detect the carbon dioxide concentration in the sample gas to be tested; after the analysis unit 3 detects for a period of time, in order to judge the detection accuracy of the analysis unit 3, the control unit 5 can control the control unit 2 to be closed according to the set time point, and control the calibration unit 4 to be opened, so that the standard sample gas stored in the calibration unit 4 is Enter the analysis unit 3, detect the carbon dioxide concentration of the standard sample gas through the analysis unit 3, compare the carbon dioxide concentration of the standard sample gas with the carbon dioxide concentration of the sample gas to be tested, so as to judge the detection accuracy of the analysis unit 3, and calibrate the analysis unit 3 according to the detection result of the standard sample gas, so that the carbon dioxide concentration of the sample gas to be tested finally detected by the analysis unit 3 can be accurate. The carbon capture DCS control system in the adsorption carbon capture device can be used as the control unit 5. The carbon dioxide monitoring system provided by the present application reduces the leakage risk of carbon dioxide in the detection process, improves the detection accuracy, reduces the operation and maintenance cost, shortens the detection process of the sample gas to be tested, and improves the detection speed, which solves the problem that the carbon dioxide in the flue gas is not monitored during the carbon capture process in the prior art, and the existing carbon dioxide monitoring device has the problem of delayed analysis results and low accuracy.

[0023] In one embodiment, Figure 1 As shown, the pretreatment unit 1 includes: a filter 11 and a dryer 12; The filter 11 is used to filter impurities in the carbon dioxide entering the pretreatment unit 1; The dryer 12 is used to dry the carbon dioxide after removing impurities.

[0024] The control unit 2 includes: an electrically controlled switch valve 21; The electric control switch valve 21 is arranged between the pre-processing unit 1 and the carbon dioxide delivery pipe, and is connected to the control unit 5 by signal; The control unit 5 is further used to control the electric control switch valve 21 to open or close, so as to cut off or restore the communication relationship between the carbon dioxide delivery pipe and the pretreatment unit 1 .

[0025] The control unit 2 further includes: a pressure regulating valve 22; The pressure regulating valve 22 is disposed between the electric control switch valve 21 and the pretreatment unit 1 , and is used to regulate the pressure of the carbon dioxide entering the pretreatment unit 1 .

[0026] A first delivery pipe is arranged between the pretreatment unit 1 and the carbon dioxide delivery pipe, and the control unit 2 is arranged on the first delivery pipe between the pretreatment unit 1 and the carbon dioxide delivery pipe. The control unit 5 controls the electrically controlled switch valve 21 of the control unit 2 to open. The carbon dioxide in the carbon dioxide delivery pipe flows through the filter 11 and the dryer 12 of the pretreatment unit 1 in sequence after passing through the first delivery pipe and the electrically controlled switch valve 21. A pressure regulating valve 22 is arranged between the electrically controlled switch valve 21 and the filter 11. The pressure of the carbon dioxide entering the filter 11 is regulated by the pressure regulating valve 22. The control unit 5 can also be connected to the pressure regulating valve 22 by signal so as to control the valve core opening of the pressure regulating valve 22 through the control unit 5. The carbon dioxide is filtered out of impurities by the filter 11, and is dried by the dryer 12 after the impurities are filtered out. After being processed by the filter 11 and the dryer 12, it becomes a clean sample gas to be tested, and then the sample gas to be tested enters the analysis unit 3 for concentration detection.

[0027] In order to detect the carbon dioxide concentration in the sample gas to be tested, the analysis unit 3 includes: an analyzer 31; The analyzer 31 is connected to the sample gas output end of the pre-processing unit 1 and is used to detect the concentration of carbon dioxide in the sample gas to be tested and the concentration of carbon dioxide in the standard sample gas.

[0028] The analysis unit 3 further includes: a flow regulator 32 and a reversing valve 33; The flow regulator 32 is disposed between the pre-processing unit 1 and the analyzer 31, and is used to regulate the flow of the sample gas to be tested entering the analyzer 31; The reversing valve 33 is arranged between the flow regulator 32 and the analyzer 31, and is connected to the standard sample gas output end of the calibration unit 4. The reversing valve 33 is used to cut off or restore the connection between the analyzer 31 and the pretreatment unit 1, and is also used to cut off or restore the connection between the analyzer 31 and the calibration unit 4.

[0029] A second delivery pipe is arranged between the dryer 12 of the pretreatment unit 1 and the analyzer 31 of the analysis unit 3, and a flow regulator 32 and a reversing valve 33 are arranged on the second delivery pipe in sequence. The reversing valve 33 may be a three-way switching valve. After the sample gas to be tested flows out of the dryer 12, it enters the second delivery pipe. The flow rate of the sample gas to be tested entering the analyzer 31 is adjusted by the flow regulator 32, that is, the gas volume of the sample gas to be tested entering the analyzer 31 is controlled. The reversing valve 33 is arranged between the flow regulator 32 and the analyzer 31. When the analyzer 31 detects the concentration of carbon dioxide in the sample gas to be tested, the reversing valve 33 is adjusted. At this time, the reversing valve 33 controls the analyzer 31 to be connected with the dryer 12 of the pre-treatment unit 1, and the sample gas to be tested flows into the analyzer 31. When the analyzer 31 is calibrated later, the reversing valve 33 is reversed to cut off the connection between the analyzer 31 and the dryer 12 of the pre-treatment unit 1. After the reversing valve 33 is reversed, the calibration unit 4 is connected with the analyzer 31, and the standard sample gas enters the analyzer 3. The carbon dioxide concentration in the standard sample gas is detected by the analyzer 3. After the carbon dioxide concentration detection of the standard sample gas is completed, the reversing valve 33 is reversed again to cut off the connection between the calibration unit 4 and the analyzer 31.

[0030] In order to ensure the accuracy of the detection of the analyzer 31 of the analysis unit 3, the reversing valve 33 is reversed so that the standard sample gas in the calibration unit 4 enters the analyzer 31. The analyzer 31 determines the detection accuracy of the analyzer 31 based on the comparison result of the carbon dioxide concentration of the standard sample gas obtained by detection and the carbon dioxide concentration of the sample gas to be tested. In order to avoid the standard sample gas from impacting the analyzer 31 due to excessive pressure when entering the analyzer 31 and causing damage to the analyzer 31, the carbon dioxide monitoring system also includes: a pressure reducing device 6; the pressure reducing device 6 is arranged between the reversing valve 33 and the calibration unit 4, and is used to adjust the pressure of the standard sample gas entering the analyzer 31. The pressure reducing device 6 is a pressure reducing valve, which adjusts the pressure of the standard sample gas entering the analyzer 31 through the pressure reducing valve to avoid the standard sample gas pressure from being too high and impacting the analyzer 31.

[0031] Another aspect of the present invention provides a carbon dioxide monitoring method for an adsorption carbon capture device, which is implemented based on any of the above carbon dioxide monitoring systems, and the carbon dioxide monitoring method comprises: Filtering and drying carbon dioxide in a carbon dioxide delivery pipe from a carbon capture device to form a sample gas to be tested; Detecting the carbon dioxide concentration in the sample gas in real time by using an analysis unit; After the sample gas to be tested is detected by the analysis unit for a period of time, the standard sample gas is delivered to the analysis unit through the calibration unit at a preset time point, and the carbon dioxide concentration of the standard sample gas is detected by the analysis unit; The analysis unit is calibrated by comparing the carbon dioxide concentration of the standard sample gas detected by the analysis unit with the carbon dioxide concentration of the sample gas to be tested.

[0032] Specifically, the pressure of carbon dioxide is adjusted before filtering and drying carbon dioxide in a carbon dioxide delivery pipe from a carbon capture device.

[0033] Specifically, the pressure of the sample gas to be tested entering the calibration unit is adjusted.

[0034] The present invention provides a carbon dioxide monitoring system for an adsorption carbon capture device, wherein a control unit controls the opening and closing of a pretreatment unit, an analysis unit and a control unit. When detecting the carbon dioxide concentration in a carbon dioxide delivery pipe, the control unit controls the control unit to open, and the carbon dioxide in the carbon dioxide delivery pipe enters the pretreatment unit through the control unit, and the carbon dioxide is filtered and dried by the pretreatment unit to form a sample gas to be tested. After the sample gas to be tested enters the analysis unit, the analysis unit detects the carbon dioxide concentration in the sample gas to be tested. After monitoring for a period of time, the analysis unit stops detecting the sample gas to be tested, and the control unit controls the calibration unit to open, so that the standard sample gas of the calibration unit enters the analysis unit, and the carbon dioxide concentration in the standard sample gas is detected by the analysis unit, and the carbon dioxide concentration of the standard sample gas is compared with the carbon dioxide concentration of the sample gas to be tested to determine the detection accuracy of the analysis unit, and the analysis unit is calibrated according to the detection result of the standard sample gas, so that the carbon dioxide concentration detected by the analysis unit can be accurate. The carbon dioxide monitoring system and method for an adsorption carbon capture device provided by the present invention reduce the risk of leakage of carbon dioxide that may exist during the detection process, improve detection accuracy, reduce operation and maintenance costs, shorten the detection process of the sample gas to be tested, and improve the detection speed, thereby solving the problem that the carbon dioxide in the flue gas is not monitored during the carbon capture process in the prior art, and the existing carbon dioxide monitoring devices have delayed analysis results and low accuracy.

[0035] The above describes in detail the optional implementation modes of the embodiments of the present invention in combination with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical scheme of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0036] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0037] Those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including a number of instructions to enable a single-chip microcomputer, a chip or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0038] In addition, various implementation modes of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed by the embodiments of the present invention.

Claims

1. A carbon dioxide monitoring system for an adsorption carbon capture device, characterized in that: The carbon dioxide monitoring system comprises: A pretreatment unit (1) is connected to the carbon dioxide delivery pipe of the carbon capture device and is used to filter and dry the carbon dioxide flowing through the pretreatment unit (1) to form a sample gas to be tested; A control unit (2) is arranged between the pretreatment unit (1) and the carbon dioxide delivery pipe, and is used to cut off or restore the connection between the carbon dioxide delivery pipe and the pretreatment unit (1); An analysis unit (3) connected to the sample gas output end of the preprocessing unit (1), the analysis unit (3) being used to detect the carbon dioxide concentration in the sample gas to be tested and the carbon dioxide concentration in the standard sample gas; A calibration unit (4), connected to the sample gas inlet end of the analysis unit (3), used for storing standard sample gas and delivering the standard sample gas to the analysis unit (3); A control unit (5) is used to control the start and stop of the pre-processing unit (1), the regulating unit (2) and the analyzing unit (3).

2. The carbon dioxide monitoring system according to claim 1, characterized in that: The pretreatment unit (1) comprises: a filter (11) and a dryer (12); The filter (11) is used to filter impurities in the carbon dioxide entering the pretreatment unit (1); The dryer (12) is used to dry the carbon dioxide after removing impurities.

3. The carbon dioxide monitoring system according to claim 1, characterized in that: The control unit (2) comprises: an electrically controlled switch valve (21); The electrically controlled switch valve (21) is arranged between the pretreatment unit (1) and the carbon dioxide delivery pipe, and is signal-connected to the control unit (5); The control unit (5) is also used to control the opening or closing of the electrically controlled switch valve (21) so as to cut off or restore the communication relationship between the carbon dioxide delivery pipe and the pretreatment unit (1).

4. The carbon dioxide monitoring system according to claim 3, characterized in that: The control unit (2) further comprises: a pressure regulating valve (22); The pressure regulating valve (22) is arranged between the electrically controlled switch valve (21) and the pretreatment unit (1), and is used to regulate the pressure of the carbon dioxide entering the pretreatment unit (1).

5. The carbon dioxide monitoring system according to claim 1, characterized in that: The analysis unit (3) comprises: an analyzer (31); The analyzer (31) is connected to the sample gas output end of the pre-processing unit (1) and is used to detect the concentration of carbon dioxide in the sample gas to be tested and the concentration of carbon dioxide in the standard sample gas.

6. The carbon dioxide monitoring system according to claim 5, characterized in that: The analysis unit (3) further comprises: a flow regulator (32) and a reversing valve (33); The flow regulator (32) is arranged between the pre-processing unit (1) and the analyzer (31), and is used to regulate the flow of the sample gas to be tested entering the analyzer (31); The reversing valve (33) is arranged between the flow regulator (32) and the analyzer (31), and is connected to the standard sample gas output end of the calibration unit (4). The reversing valve (33) is used to cut off or restore the communication relationship between the analyzer (31) and the pretreatment unit (1), and is also used to cut off or restore the communication relationship between the analyzer (31) and the calibration unit (4).

7. The carbon dioxide monitoring system according to claim 6, characterized in that: The carbon dioxide monitoring system further comprises: a pressure reducing device (6); The pressure reducing device (6) is arranged between the reversing valve (33) and the calibration unit (4) and is used to adjust the pressure of the standard sample gas entering the analyzer (31).

8. A carbon dioxide monitoring method for an adsorption carbon capture device, implemented based on the carbon dioxide monitoring system according to any one of claims 1 to 7, characterized in that: The carbon dioxide monitoring method comprises: Filtering and drying carbon dioxide in a carbon dioxide delivery pipe from a carbon capture device to form a sample gas to be tested; Detecting the carbon dioxide concentration in the sample gas in real time by using an analysis unit; After the sample gas to be tested is detected by the analysis unit for a period of time, the standard sample gas is delivered to the analysis unit through the calibration unit at a preset time point, and the carbon dioxide concentration of the standard sample gas is detected by the analysis unit; The analysis unit is calibrated by comparing the carbon dioxide concentration of the standard sample gas detected by the analysis unit with the carbon dioxide concentration of the sample gas to be tested.

9. The carbon dioxide monitoring method according to claim 8, characterized in that: The pressure of the CO2 is regulated before filtering and drying the CO2 in the CO2 pipeline from the carbon capture plant.

10. The carbon dioxide monitoring method according to claim 8, characterized in that: Regulate the pressure of the sample gas to be measured entering the calibration unit.

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