Device for on-line measurement of CO2 load of absorbent in carbon capture system and use method thereof

Abstract

The invention discloses a carbon capture system absorbent CO2 load on-line measurement device and a use method, and relates to the technical field of measurement devices.The device comprises a first liquid storage component, a second liquid storage component, a middle containing and weighing mechanism, a reaction mechanism, an air exhaust component and a controller; an outlet of the first liquid storage component is connected with an inlet of the middle containing and weighing mechanism through the first control component, and the first control component is used for controlling whether the outlet of the first liquid storage component is communicated with the inlet of the middle containing and weighing mechanism or not. An outlet of the middle containing weighing mechanism and an outlet of the second liquid storage component are connected with an inlet of the liquid inlet pipe through a second control component, and the second control component is used for controlling whether the outlet of the middle containing weighing mechanism is communicated with the inlet of the liquid inlet pipe or not and whether the outlet of the second liquid storage component is communicated with the inlet of the liquid inlet pipe or not. And the CO2 absorption capacity of the absorbent in the carbon capture system can be monitored in real time, so that an operator is helped to know the operation condition of the carbon capture system.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring devices, and in particular to a device for online measuring the CO2 load of an absorbent in a carbon capture system and a method for using the device. Background Art

[0002] Carbon capture systems are designed to reduce atmospheric carbon dioxide (CO2) levels. They typically use chemical absorbents to separate CO2 from exhaust gas streams, which are then compressed and stored in suitable underground reservoirs. However, existing technologies cannot monitor the CO2 absorption capacity of the absorbents in carbon capture systems in real time, making it difficult for operators to understand the system's operating status. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a device and method for online measurement of the CO2 load of an absorbent in a carbon capture system, which can monitor the CO2 absorption capacity of the absorbent in the carbon capture system in real time, thereby helping operators understand the operating status of the carbon capture system.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a device for online measuring the CO2 load of an absorbent in a carbon capture system, comprising a first liquid storage component, a second liquid storage component, an intermediate holding and weighing mechanism, a liquid inlet pipe, a liquid discharge pipe, a reaction mechanism, an exhaust component and a controller, wherein the first liquid storage component, the intermediate holding and weighing mechanism and the reaction mechanism are arranged in sequence from top to bottom, the second liquid storage component is located above the reaction mechanism, the second liquid storage component is used to place a sulfuric acid solution, the inlet of the first liquid storage component is used to connect with the carbon capture system so that the solution to be tested enters the first liquid storage component, the outlet of the first liquid storage component is connected to the inlet of the intermediate holding and weighing mechanism through a first control component, the first control component is used to control whether the outlet of the first liquid storage component is connected to the inlet of the intermediate holding and weighing mechanism, and a first control valve is provided at the outlet of the intermediate holding and weighing mechanism; the reaction mechanism comprises an outer shell, an inner shell, a first weight sensing component and a waterproof and breathable component, The inner shell is arranged at the bottom of the outer shell, and the first weight sensing component is arranged between the bottom of the inner shell and the outer shell. The waterproof and breathable component is arranged in the inner shell and divides the inner shell into a liquid chamber and a gas chamber arranged side by side. The air extraction component is connected to the gas chamber, the outlet of the liquid inlet pipe is connected to the top of the liquid chamber, the inlet of the liquid discharge pipe is connected to the bottom of the liquid chamber, and a liquid discharge valve is provided on the liquid discharge pipe; the outlet of the intermediate holding weighing mechanism and the outlet of the second liquid storage component are both connected to the inlet of the liquid inlet pipe through a second control component, and the second control component is used to control whether the outlet of the intermediate holding weighing mechanism is connected to the inlet of the liquid inlet pipe, and whether the outlet of the second liquid storage component is connected to the inlet of the liquid inlet pipe; the first control component, the intermediate holding weighing mechanism, the first control valve, the first weight sensing component, the liquid discharge valve and the second control component are all connected to the controller.

[0006] Preferably, it further comprises a waste liquid holding component, which is located below the reaction mechanism, and the drain pipe is used to discharge the waste liquid in the liquid chamber into the waste liquid holding component.

[0007] Preferably, the first control component is a first three-way solenoid valve, the outlet of the first liquid storage component is connected to the inlet of the first three-way solenoid valve through a first pipeline, the first outlet of the first three-way solenoid valve is connected to the inlet of the intermediate holding and weighing mechanism through a second pipeline, and the second outlet of the first three-way solenoid valve is connected to the waste liquid holding component through a third pipeline.

[0008] Preferably, the second control component is a second three-way solenoid valve, the inlet of the liquid inlet pipe is connected to the outlet of the second three-way solenoid valve, the outlet of the intermediate holding weighing mechanism is connected to the first inlet of the second three-way solenoid valve through a fourth pipeline, and the outlet of the second liquid storage component is connected to the second inlet of the second three-way solenoid valve through a fifth pipeline.

[0009] Preferably, it also includes a third liquid storage component, which is located above the intermediate holding and weighing mechanism. The third liquid storage component is used to store clean water. The third liquid storage component is connected to the inlet of the intermediate holding and weighing mechanism through a sixth pipeline. A second control valve is provided on the sixth pipeline, and the second control valve is connected to the controller.

[0010] Preferably, the intermediate holding weighing mechanism includes a support platform and an intermediate holding component arranged on the support platform, a second weight sensing component is arranged between the intermediate holding component and the support platform, the second weight sensing component is connected to the controller, the first control valve is arranged at the outlet at the bottom of the intermediate holding component, and the outlet of the intermediate holding component and the outlet of the second liquid storage component are both connected to the inlet of the liquid inlet pipe through the second control component.

[0011] Preferably, an electric heating component is provided on the outside of the outer shell, a temperature sensing component is provided between the outer shell and the inner shell, and both the electric heating component and the temperature sensing component are connected to the controller.

[0012] Preferably, the waterproof and breathable component is vertically arranged in the inner shell, and divides the inner shell into the liquid chamber and the gas chamber which are arranged side by side on the left and right.

[0013] Preferably, the air extraction component is an air extraction pump, and the air extraction pump is connected to the gas cavity through an air extraction pipe.

[0014] The present invention also provides a method for using a device for online measuring CO2 load of an absorbent in a carbon capture system, comprising the following steps:

[0015] Step 1: Controlling the first control component via the controller so that the outlet of the first liquid storage component is connected to the inlet of the intermediate holding and weighing mechanism, so that the solution to be tested enters the intermediate holding and weighing mechanism for weighing; when the solution to be tested in the intermediate holding and weighing mechanism reaches a set weight, controlling the first control component via the controller so that the outlet of the first liquid storage component is disconnected from the inlet of the intermediate holding and weighing mechanism;

[0016] Step 2: Controlling the second control component via the controller so that the outlet of the second liquid storage component is connected to the inlet of the liquid inlet pipe, so that the sulfuric acid solution enters the liquid chamber of the reaction mechanism through the liquid inlet pipe, and weighing the sulfuric acid solution flowing into the liquid chamber via the first weight sensing component. When the sulfuric acid solution in the liquid chamber reaches a set weight, controlling the second control component via the controller so that the outlet of the second liquid storage component is disconnected from the inlet of the liquid inlet pipe;

[0017] Step three: Open the first control valve through the controller, and control the second control component so that the outlet of the intermediate holding and weighing mechanism is connected to the inlet of the liquid inlet pipe, so that a certain weight of the solution to be tested in the intermediate holding and weighing mechanism flows into the liquid cavity and reacts with a certain weight of sulfuric acid solution. The CO2 generated during the reaction enters the gas cavity through the waterproof and breathable component and is pumped to the outside by the exhaust component. The mass of the post-reaction solution in the liquid cavity is obtained through the first weight sensing component, and the CO2 content in the solution to be tested can be calculated.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] In the present invention, a certain weight of the solution to be tested is weighed and temporarily stored through an intermediate weighing mechanism, and then a certain weight of sulfuric acid solution is placed in the liquid cavity. The first control valve is opened to allow the certain weight of the solution to be tested in the intermediate weighing mechanism to flow into the liquid cavity and react with the certain weight of sulfuric acid solution. The CO2 generated during the reaction enters the gas cavity through the waterproof and breathable component and is pumped to the outside by the exhaust component. The mass of the post-reaction solution is obtained through the first weight sensing component, and the CO2 content in the solution to be tested can be calculated. The CO2 absorption capacity of the absorbent in the carbon capture system can then be monitored in real time, thereby helping operators understand the operating status of the carbon capture system. By monitoring the load of the absorbent, the parameters of the carbon capture system can be adjusted in time to maximize the CO2 capture efficiency and optimize the system performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic structural diagram of the device for online measuring the CO2 load of the absorbent in the carbon capture system provided by the present invention.

[0022] Explanation of the accompanying reference numerals: 1. Carbon capture system; 2. First liquid storage component; 3. Second liquid storage component; 4. Third liquid storage component; 5. First control component; 6. Intermediate holding component; 7. Second control component; 8. Outer shell; 9. Inner shell; 10. Waterproof and breathable component; 11. Liquid chamber; 12. Gas chamber; 13. Exhaust pipe; 14. Exhaust component; 15. Liquid inlet pipe; 16. Liquid discharge pipe; 17. Waste liquid holding component; 18. First pipeline; 19. Second pipeline; 20. Third pipeline; 21. Fourth pipeline; 22. Fifth pipeline; 23. Sixth pipeline; 24. Second control valve; 25. Controller. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] The purpose of the present invention is to provide a device and method for online measuring the CO2 load of an absorbent in a carbon capture system, which can monitor the CO2 absorption capacity of the absorbent in the carbon capture system in real time, thereby helping operators understand the operating status of the carbon capture system.

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1 As shown, this embodiment provides a device for online measurement of absorbent CO2 load in a carbon capture system, comprising a first liquid storage component 2, a second liquid storage component 3, an intermediate holding and weighing mechanism, a liquid inlet pipe 15, a liquid discharge pipe 16, a reaction mechanism, an exhaust component 14 and a controller 25. The first liquid storage component 2, the intermediate holding and weighing mechanism and the reaction mechanism are arranged in sequence from top to bottom, the second liquid storage component 3 is located above the reaction mechanism, and the second liquid storage component 3 is used to place sulfuric acid solution. The inlet of the first liquid storage component 2 is used to connect with the carbon capture system 1 so that the solution to be tested enters the first liquid storage component 2. By setting the first liquid storage component 2, the absorbent solution in the carbon capture system 1 can be collected online. The absorbent liquid here is the solution to be tested. The outlet of the first liquid storage component 2 is connected to the inlet of the intermediate holding and weighing mechanism through the first control component 5. The first control component 5 is used to control whether the outlet of the first liquid storage component 2 is connected to the inlet of the intermediate holding and weighing mechanism. A first control valve is provided at the outlet of the intermediate holding and weighing mechanism.

[0027] The reaction mechanism includes an outer shell 8, an inner shell 9, a first weight sensing component and a waterproof and breathable component 10. The inner shell 9 is arranged at the bottom of the outer shell 8. The first weight sensing component is arranged between the bottom of the inner shell 9 and the outer shell 8. The waterproof and breathable component 10 is arranged in the inner shell 9 and divides the inner shell 9 into a liquid chamber 11 and a gas chamber 12 arranged side by side. The air extraction component 14 is connected to the gas chamber 12, the outlet of the liquid inlet pipe 15 is connected to the top of the liquid chamber 11, the inlet of the discharge pipe 16 is connected to the bottom of the liquid chamber 11, and the discharge pipe 16 is provided with a discharge valve.

[0028] The outlet of the intermediate holding weighing mechanism and the outlet of the second liquid storage component 3 are both connected to the inlet of the liquid inlet pipe 15 through the second control component 7. The second control component 7 is used to control whether the outlet of the intermediate holding weighing mechanism is connected to the inlet of the liquid inlet pipe 15, and whether the outlet of the second liquid storage component 3 is connected to the inlet of the liquid inlet pipe 15; the first control component 5, the intermediate holding weighing mechanism, the first control valve, the first weight sensing component, the drain valve and the second control component 7 are all connected to the controller 25.

[0029] In this embodiment, a certain weight of the solution to be tested is weighed and temporarily stored by an intermediate weighing mechanism, and then a certain weight of sulfuric acid solution is placed in the liquid chamber 11. The first control valve is opened to allow the certain weight of the solution to be tested in the intermediate weighing mechanism to flow into the liquid chamber 11 and react with the certain weight of sulfuric acid solution. The CO2 generated during the reaction enters the gas chamber 12 through the waterproof and breathable component 10 and is pumped to the outside by the exhaust component 14. The mass of the post-reaction solution is obtained through the first weight sensing component, and the CO2 content in the solution to be tested can be calculated. The CO2 absorption capacity of the absorbent in the carbon capture system 1 can then be monitored in real time, thereby helping the operator understand the operating status of the carbon capture system 1. By monitoring the load of the absorbent, the parameters of the carbon capture system 1 can be adjusted in a timely manner to maximize the CO2 capture efficiency and optimize the system performance.

[0030] This embodiment further includes a waste liquid holding component 17, which is located below the reaction mechanism. The drain pipe 16 is used to discharge the waste liquid in the liquid chamber 11 into the waste liquid holding component 17. Specifically, the waste liquid holding component 17 is an open structure at the top, and the outlet of the drain pipe 16 is located above the waste liquid holding component 17.

[0031] Specifically, the first control component 5 is a first three-way solenoid valve, the outlet of the first liquid storage component 2 is connected to the inlet of the first three-way solenoid valve through the first pipeline 18, the first outlet of the first three-way solenoid valve is connected to the inlet of the intermediate holding weighing mechanism through the second pipeline 19, and the second outlet of the first three-way solenoid valve is connected to the waste liquid holding component 17 through the third pipeline 20.

[0032] Specifically, the second control component 7 is a second three-way solenoid valve, the inlet of the liquid inlet pipe 15 is connected to the outlet of the second three-way solenoid valve, the outlet of the intermediate weighing mechanism is connected to the first inlet of the second three-way solenoid valve through the fourth pipeline 21, and the outlet of the second liquid storage component 3 is connected to the second inlet of the second three-way solenoid valve through the fifth pipeline 22.

[0033] This embodiment also includes a third liquid storage component 4, which is located above the intermediate weighing mechanism. The third liquid storage component 4 is used to store clean water. The third liquid storage component 4 is connected to the inlet of the intermediate weighing mechanism via a sixth pipeline 23. The sixth pipeline 23 is provided with a second control valve 24, which is connected to a controller 25. Specifically, the second control valve 24 is a two-way solenoid valve.

[0034] The intermediate holding and weighing mechanism includes a support platform and an intermediate holding component 6 mounted on the support platform. A second weight sensing component is disposed between the intermediate holding component 6 and the support platform and is connected to a controller 25. A first control valve is provided at the outlet at the bottom of the intermediate holding component 6. The outlet of the intermediate holding component 6 and the outlet of the second liquid storage component 3 are both connected to the inlet of the liquid inlet pipe 15 via a second control component 7. During operation, the second weight sensing component is used to obtain the weight of the solution to be tested that enters the intermediate holding component 6.

[0035] Specifically, the first outlet of the first three-way solenoid valve is connected to the inlet of the intermediate containing component 6 through the second pipeline 19 , and the outlet of the intermediate containing component 6 is connected to the first inlet of the second three-way solenoid valve through the fourth pipeline 21 .

[0036] In this specific embodiment, the first weight sensing component is a first weight sensor, the second weight sensing component is a second weight sensor, and the intermediate containing component 6 is an intermediate containing box.

[0037] An electric heating component is provided on the outside of the outer shell 8, and a temperature sensing component is provided between the outer shell 8 and the inner shell 9. Both the electric heating component and the temperature sensing component are connected to the controller 25. During operation, the temperature sensing component and the electric heating component cooperate with the controller 25 to enable the reaction mechanism to maintain the set temperature.

[0038] In this specific embodiment, the electric heating component is an electric heating wire, which is wound around the outside of the housing 8 , and the temperature sensing component is a temperature sensor.

[0039] The waterproof and breathable component 10 is vertically disposed within the inner shell 9 and divides the inner shell 9 into a liquid chamber 11 and a gas chamber 12, which are arranged side by side on the left and right. The waterproof and breathable component 10 in this embodiment includes a rectangular frame and a waterproof and breathable membrane disposed within the rectangular frame. The rectangular frame is vertically fixed within the inner shell 9.

[0040] Specifically, a gas exhaust hole communicating with the gas cavity 12 is provided on one side of the inner shell 9 , and a liquid inlet hole and a liquid discharge hole communicating with the liquid cavity 11 are provided on the top and bottom of the inner shell 9 , respectively.

[0041] In this embodiment, the air extraction component 14 is an air extraction pump, which is connected to the gas chamber 12 via an air extraction pipe 13. Specifically, one end of the air extraction pipe 13 is connected to the air extraction pump, and the other end passes through the outer shell 8 and is connected to the exhaust hole of the inner shell 9.

[0042] In this embodiment, one end of the liquid inlet pipe 15 is located outside the outer shell 8 and connected to the outlet of the second three-way solenoid valve, and the other end passes through the outer shell 8 and connects to the liquid inlet hole of the inner shell 9. One end of the liquid discharge pipe 16 is located outside the outer shell 8 and is used to discharge liquid, and the other end passes through the outer shell 8 and connects to the liquid discharge hole of the inner shell 9.

[0043] In this specific embodiment, the first liquid storage component 2 is a first liquid storage tank, the second liquid storage component 3 is a second liquid storage tank, the third liquid storage component 4 is a third liquid storage tank, and the waste liquid holding component 17 is a waste liquid tank.

[0044] This embodiment also provides a method for using a device for online measuring CO2 load of an absorbent in a carbon capture system, comprising the following steps:

[0045] Step 1: Control the first control component 5 through the controller 25 so that the outlet of the first liquid storage component 2 is connected to the inlet of the intermediate holding weighing mechanism, so that the solution to be tested enters the intermediate holding weighing mechanism for weighing. When the solution to be tested in the intermediate holding weighing mechanism reaches the set weight, control the first control component 5 through the controller 25 so that the outlet of the first liquid storage component 2 is disconnected from the inlet of the intermediate holding weighing mechanism.

[0046] Specifically, the controller 25 controls the first three-way solenoid valve to connect the first pipeline 18 and the second pipeline 19, so that the solution to be detected enters the intermediate holding component 6. The second weight sensing component at the lower part of the intermediate holding component 6 monitors the weight of the solution to be detected. When the set weight is reached, the controller 25 controls the first three-way solenoid valve to disconnect the first pipeline 18 and the second pipeline 19. The weight of the solution to be detected is recorded as m1.

[0047] Step 2: Control the second control component 7 through the controller 25 so that the outlet of the second liquid storage component 3 is connected to the inlet of the liquid inlet pipe 15, and the sulfuric acid solution enters the liquid chamber 11 of the reaction mechanism through the liquid inlet pipe 15. The sulfuric acid solution flowing into the liquid chamber 11 is weighed by the first weight sensing component. When the sulfuric acid solution in the liquid chamber 11 reaches the set weight, the controller 25 controls the second control component 7 so that the outlet of the second liquid storage component 3 is disconnected from the inlet of the liquid inlet pipe 15.

[0048] Specifically, the controller 25 controls the second three-way solenoid valve to connect the fifth pipeline 22 and the liquid inlet pipe 15, so that the sulfuric acid solution enters the liquid chamber 11. The first weight sensing component at the lower part of the inner shell 9 monitors the weight of the sulfuric acid solution. When the set weight is reached, the controller 25 controls the second three-way solenoid valve to disconnect the fifth pipeline 22 from the liquid inlet pipe 15. The weight of the sulfuric acid solution is recorded as m2.

[0049] Step 3: Open the first control valve through the controller 25, and control the second control component 7 so that the outlet of the intermediate weighing mechanism is connected to the inlet of the liquid inlet pipe 15, so that a certain weight of the solution to be tested in the intermediate weighing mechanism flows into the liquid chamber 11 and reacts with a certain weight of sulfuric acid solution. The CO2 generated during the reaction enters the gas chamber 12 through the waterproof and breathable component 10 and is pumped to the outside by the exhaust component 14. The mass of the post-reaction solution in the liquid chamber 11 is obtained through the first weight sensing component, and the CO2 content in the solution to be tested can be calculated.

[0050] Specifically, after opening the first control valve, the controller 25 controls the second three-way solenoid valve to connect the fourth line 21 to the liquid inlet pipe 15, allowing the test solution in the intermediate holding component 6 to enter the liquid chamber 11. The test solution reacts with the sulfuric acid solution to produce CO2, which enters the gas chamber 12 through the waterproof and breathable component 10 and is pumped to the outside by the exhaust component 14. The mass m3 after stabilization is recorded, and the CO2 content in the test solution can be calculated. The CO2 content in the test solution can be calculated by dividing the weight m1 of the test solution by m1+m2-m3.

[0051] When a measurement is completed, the first control valve is in the open state, and the fourth pipeline 21 is connected to the liquid inlet pipe 15. At this time, the controller 25 controls the drain valve to open, so that the waste liquid in the liquid chamber 11 flows into the waste liquid holding component 17. The controller 25 opens the second control valve 24, so that the clean water in the third liquid storage component 4 flows into the intermediate holding component 6 to clean the intermediate holding component 6, and then enters the liquid chamber 11 through the fourth pipeline 21 and the liquid inlet pipe 15 to clean the liquid chamber 11. The cleaned water flows from the drain pipe 16 to the waste liquid holding component 17. That is, in this embodiment, the cleaning of the intermediate holding component 6 and the liquid chamber 11 can be achieved, avoiding the influence of the solution left over from the previous measurement on the subsequent measurements, thereby improving the practicality of the device.

[0052] When the overall measurement is completed, the controller 25 controls the first three-way solenoid valve to connect the first pipeline 18 and the third pipeline 20 , so that the solution to be tested in the first liquid storage component 2 flows into the waste liquid holding component 17 .

[0053] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A device for online measurement of absorbent CO2 loading in a carbon capture system, characterized in that: It includes a first liquid storage component, a second liquid storage component, an intermediate weighing mechanism, a liquid inlet pipe, a liquid discharge pipe, a reaction mechanism, an air extraction component and a controller. The first liquid storage component, the intermediate weighing mechanism and the reaction mechanism are arranged in sequence from top to bottom. The second liquid storage component is located above the reaction mechanism. The second liquid storage component is used to place sulfuric acid solution. The inlet of the first liquid storage component is used to connect with the carbon capture system so that the solution to be tested enters the first liquid storage component. The outlet of the first liquid storage component is connected to the inlet of the intermediate weighing mechanism through a first control component. The first control component is used to control whether the outlet of the first liquid storage component is connected to the inlet of the intermediate weighing mechanism. A first control valve is provided at the outlet of the intermediate weighing mechanism. The reaction mechanism includes an outer shell, an inner shell, a first weight sensing component and a waterproof and breathable component. The inner shell is provided at the bottom of the outer shell. The first weight sensing component is arranged between the bottom of the inner shell and the outer shell, the waterproof and breathable component is arranged in the inner shell, and divides the inner shell into a liquid chamber and a gas chamber arranged side by side, the air extraction component is connected to the gas chamber, the outlet of the liquid inlet pipe is connected to the top of the liquid chamber, the inlet of the liquid discharge pipe is connected to the bottom of the liquid chamber, and a liquid discharge valve is arranged on the liquid discharge pipe; the outlet of the intermediate holding weighing mechanism and the outlet of the second liquid storage component are both connected to the inlet of the liquid inlet pipe through a second control component, and the second control component is used to control whether the outlet of the intermediate holding weighing mechanism is connected to the inlet of the liquid inlet pipe, and whether the outlet of the second liquid storage component is connected to the inlet of the liquid inlet pipe; the first control component, the intermediate holding weighing mechanism, the first control valve, the first weight sensing component, the liquid discharge valve and the second control component are all connected to the controller.

2. The device for online measurement of absorbent CO2 load in a carbon capture system according to claim 1, characterized in that: It also includes a waste liquid holding component, which is located below the reaction mechanism. The drain pipe is used to discharge the waste liquid in the liquid chamber into the waste liquid holding component.

3. The device for online measurement of absorbent CO2 load in a carbon capture system according to claim 2, characterized in that: The first control component is a first three-way solenoid valve, the outlet of the first liquid storage component is connected to the inlet of the first three-way solenoid valve through a first pipeline, the first outlet of the first three-way solenoid valve is connected to the inlet of the intermediate holding and weighing mechanism through a second pipeline, and the second outlet of the first three-way solenoid valve is connected to the waste liquid holding component through a third pipeline.

4. The device for online measurement of absorbent CO2 load in a carbon capture system according to claim 1, characterized in that: The second control component is a second three-way solenoid valve, the inlet of the liquid inlet pipe is connected to the outlet of the second three-way solenoid valve, the outlet of the intermediate weighing mechanism is connected to the first inlet of the second three-way solenoid valve through a fourth pipeline, and the outlet of the second liquid storage component is connected to the second inlet of the second three-way solenoid valve through a fifth pipeline.

5. The device for online measurement of absorbent CO2 load in a carbon capture system according to claim 1, characterized in that: It also includes a third liquid storage component, which is located above the intermediate holding and weighing mechanism. The third liquid storage component is used to store clean water. The third liquid storage component is connected to the inlet of the intermediate holding and weighing mechanism through a sixth pipeline. A second control valve is provided on the sixth pipeline, and the second control valve is connected to the controller.

6. The device for online measurement of absorbent CO2 load in a carbon capture system according to claim 1, characterized in that: The intermediate holding weighing mechanism includes a support platform and an intermediate holding component arranged on the support platform, a second weight sensing component is arranged between the intermediate holding component and the support platform, the second weight sensing component is connected to the controller, and the first control valve is arranged at the outlet at the bottom of the intermediate holding component, and the outlet of the intermediate holding component and the outlet of the second liquid storage component are both connected to the inlet of the liquid inlet pipe through the second control component.

7. The device for online measurement of absorbent CO2 load in a carbon capture system according to claim 1, characterized in that: An electric heating component is provided on the outside of the outer shell, a temperature sensing component is provided between the outer shell and the inner shell, and both the electric heating component and the temperature sensing component are connected to the controller.

8. The device for online measurement of absorbent CO2 load in a carbon capture system according to claim 1, characterized in that: The waterproof and breathable component is vertically arranged in the inner shell, and divides the inner shell into the liquid chamber and the gas chamber which are arranged side by side on the left and right.

9. The device for online measurement of absorbent CO2 load in a carbon capture system according to claim 1, characterized in that: The air extraction component is an air extraction pump, and the air extraction pump is connected to the gas cavity through an air extraction pipe.

10. A method for using the device for online measuring CO2 load of an absorbent in a carbon capture system according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Controlling the first control component via the controller so that the outlet of the first liquid storage component is connected to the inlet of the intermediate holding and weighing mechanism, so that the solution to be tested enters the intermediate holding and weighing mechanism for weighing; when the solution to be tested in the intermediate holding and weighing mechanism reaches a set weight, controlling the first control component via the controller so that the outlet of the first liquid storage component is disconnected from the inlet of the intermediate holding and weighing mechanism; Step 2: Controlling the second control component via the controller so that the outlet of the second liquid storage component is connected to the inlet of the liquid inlet pipe, so that the sulfuric acid solution enters the liquid chamber of the reaction mechanism through the liquid inlet pipe, and weighing the sulfuric acid solution flowing into the liquid chamber via the first weight sensing component. When the sulfuric acid solution in the liquid chamber reaches a set weight, controlling the second control component via the controller so that the outlet of the second liquid storage component is disconnected from the inlet of the liquid inlet pipe; Step three: Open the first control valve through the controller, and control the second control component so that the outlet of the intermediate holding and weighing mechanism is connected to the inlet of the liquid inlet pipe, so that a certain weight of the solution to be tested in the intermediate holding and weighing mechanism flows into the liquid cavity and reacts with a certain weight of sulfuric acid solution. The CO2 generated during the reaction enters the gas cavity through the waterproof and breathable component and is pumped to the outside by the exhaust component. The mass of the post-reaction solution in the liquid cavity is obtained through the first weight sensing component, and the CO2 content in the solution to be tested can be calculated.

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