Carbon dioxide trapping device and method based on carbon neutralization

Abstract

The invention discloses a carbon dioxide trapping device and method based on carbon neutralization. The carbon dioxide trapping device comprises a trapping tank, the bottom of the exterior of the trapping tank is sleeved with a supporting frame, a cover body is placed on the top of the trapping tank, stirring parts are jointly installed on the top of the cover body and the interior of the trapping tank, and an air inlet pipe and a liquid injection pipe are installed on the exterior of the trapping tank. The circulating pump is started, ammonia water at the bottom of the inner wall of the trapping tank is pumped out through the liquid inlet pipe and finally sprayed out from the atomization nozzle, the sprayed atomized ammonia water reacts with residual carbon dioxide in floating gas, and the content of carbon dioxide in the floating gas is reduced. And meanwhile, an external cooling water circulation system operates, so that external cooling water enters the cooling disc through a cooling water inlet pipe and then flows back to the cooling water circulation system through a cooling water outlet pipe, the cooling disc is cooled by using the cooling water, and redundant water vapor in floating gas can be condensed at the bottom of the cooling disc.

Description

Technical Field

[0001] The present invention relates to the field of carbon neutrality technology, and specifically to a carbon dioxide capture device and method based on carbon neutrality. Background Art

[0002] Carbon neutrality is a state in which greenhouse gas emissions from a specific substance result in a net increase in global greenhouse gas emissions in the atmosphere of zero. This goal is achieved by calculating greenhouse gas emissions from a specific substance and then offsetting them through measures such as tree planting. It is a self-discipline driven by reflection and introspection on the reality of global warming, and a proactive action driven by awakening. Initially championed by environmentalists, it has gradually gained public support and become a practical greening initiative recognized by governments worldwide.

[0003] After searching, the patent number is CN219682152U, and the name is a device for capturing carbon dioxide in flue gas, which includes an integrally formed solution storage tank and a spray tower. The spray tower is located above the solution storage tank, and the solution storage tank is connected to the upper side wall of the spray tower via a solution pump. The solution storage tank is provided with acetic acid solution and fly ash. A flue gas inlet is provided below the side wall of the spray tower, and a flue gas outlet is provided at the top of the spray tower. Compared with the prior art, the utility model can effectively improve the extraction efficiency of carbon dioxide in flue gas. Through research and analysis, it was found that although the extraction efficiency of carbon dioxide in flue gas is effectively improved, the following disadvantages still exist to a certain extent.

[0004] For example, when exhaust gas is not treated before being discharged, the residual water and carbon dioxide contained in the exhaust gas are discharged together, resulting in high solution consumption and low carbon dioxide capture efficiency. To address the above technical issues, we have designed a carbon-neutral carbon dioxide capture device and method. Summary of the Invention

[0005] The purpose of the present invention is to provide a carbon dioxide capture device and method based on carbon neutrality, which has the advantage of treating waste gas and solves the problem that the waste gas is not treated when it is discharged, and the residual water and carbon dioxide contained in the waste gas are discharged together, resulting in a large consumption of solution and low carbon dioxide capture efficiency.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a carbon neutrality-based carbon dioxide capture device, comprising a capture tank, wherein the bottom of the outside of the capture tank is provided with a support frame, a cover is placed on the top of the capture tank, and a stirring component is installed on the top of the cover and the inside of the capture tank. An air inlet pipe and a liquid injection pipe are respectively installed on the outside of the capture tank, one side of the air inlet pipe passes through the interior of the capture tank and is connected to an air outlet ring disk, a plurality of air outlet holes are opened at the bottom of the air outlet ring disk, a drain pipe is installed at the bottom of the capture tank, an electromagnetic valve is installed on the drain pipe, and a circulation component is installed at the bottom of the capture tank.

[0007] Preferably, the inner wall of the support frame is provided with a conical arc surface, the bottom of the outside of the capture tank is conical, the top of the outside of the capture tank and the bottom of the outside of the cover are fixedly sleeved with sealing disks, and the upper and lower sealing disks are fixedly connected by a plurality of bolts.

[0008] Preferably, the side of the air inlet pipe away from the capture tank is connected to the external air supply pipeline through a flange, the side of the liquid injection pipe away from the capture tank is connected to the external liquid supply pipe through a flange, and the side of the liquid discharge pipe away from the capture tank is connected to the external liquid delivery pipeline through a flange.

[0009] Preferably, the circulation component includes a circulation pump, which is located below the support frame. The liquid inlet end of the circulation pump is connected to a liquid inlet pipe, and the side of the liquid inlet pipe away from the circulation pump passes through the bottom of the inner wall of the capture tank, and the top of the inner wall of the liquid inlet pipe is threadedly connected to a T-shaped filter screen.

[0010] Preferably, the liquid outlet end of the circulation pump is connected to a liquid outlet pipe, the top of the liquid outlet pipe is connected to an annular tube, the inner wall of the annular tube is connected to a plurality of atomizing nozzles, and the inner side of the atomizing nozzle passes through the interior of the capture tank.

[0011] Preferably, the stirring component includes a mounting frame and a conical cover, the bottom of the mounting frame is connected to the top of the cover body, a variable frequency stirring motor is installed inside the mounting frame, the output end of the variable frequency stirring motor is connected to a connecting disk, the bottom of the connecting disk is connected to a connecting column, the bottoms of both sides of the outside of the connecting column are connected to connecting blocks, the outsides of the two connecting blocks are commonly connected to a stirring rod, and the bottom of the stirring rod passes through the cover body and extends to the bottom of the inside of the capture tank.

[0012] Preferably, a plurality of air inlet holes are provided at the top of the outside of the stirring rod, and a connecting sleeve is provided on the top of the outside of the stirring rod and the bottom of the output end of the variable frequency stirring motor through a sealed bearing. The outside of the connecting sleeve is connected to an air outlet pipe, and the side of the air outlet pipe away from the connecting sleeve is connected to the pipeline of the external gas treatment equipment through a flange.

[0013] Preferably, a cooling plate is provided on the top of the outside of the stirring rod through a bearing movable sleeve, a cooling water inlet pipe is connected to the right side of the outside of the cooling plate, the right side of the cooling water inlet pipe passes through the capture tank, a cooling water outlet pipe is connected to the left side of the outside of the cooling plate, the left side of the cooling water outlet pipe passes through the capture tank, the cooling water inlet pipe and the cooling water outlet pipe are connected to the external cooling water circulation system on the side away from the cooling plate, and a cleaning brush plate is connected to the top of the left and right sides of the outside of the stirring rod, and the top of the cleaning brush plate is in contact with the bottom of the cooling plate.

[0014] Preferably, the conical cover is sleeved on the outside of the stirring rod, the bottom of the conical cover is connected to the discharge pipe, the top of the outside of the conical cover is connected to the inner wall of the capture tank, the bottoms of the left and right sides of the outside of the stirring rod are respectively connected to the stirring plate and the cleaning brush plate 2, several mixing rods are connected between the stirring plate and the cleaning brush plate 2, and the left and right sides of the top of the cleaning brush plate 2 are connected to cleaning sliders.

[0015] A method for using a carbon-neutral carbon dioxide capture device, comprising the above-mentioned carbon-neutral carbon dioxide capture device, and the method of using the device further comprising the following steps:

[0016] Step 1: Ammonia water from the outside is injected into the capture tank through the injection pipe. The combustion exhaust gas of the power generation enterprise is injected into the capture tank through the air inlet pipe after being filtered. The exhaust gas is evenly discharged from several outlet holes at the bottom of the outlet ring plate.

[0017] Step 2: During the exhaust gas injection process, the CO2 capture device's external control terminal controls the variable frequency agitation motor, driving the agitation rod. Simultaneously, the circulation pump is activated, pumping ammonia from the bottom of the capture tank's inner wall through the liquid inlet pipe and ultimately spraying it out of the atomizing nozzle. Simultaneously, the external cooling water circulation system operates, allowing cooling water to enter the cooling plate through the cooling water inlet pipe and then return to the cooling water circulation system through the cooling water outlet pipe.

[0018] Step 3: When the mixture of ammonia water and carbon dioxide reaches the set value, stop the operation of the device and open the solenoid valve to discharge the enriched liquid through the drain pipe.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention utilizes a stirring element to provide a superior exhaust gas treatment. A circulating pump is activated, and ammonia water at the bottom of the inner wall of the capture tank is extracted via a liquid inlet pipe and ultimately ejected from an atomizing nozzle. The atomized ammonia water reacts with residual carbon dioxide in the rising gas, reducing the carbon dioxide content in the rising gas. Simultaneously, an external cooling water circulation system operates, allowing external cooling water to enter the cooling plate through the cooling water inlet pipe and then flow back to the cooling water circulation system through the cooling water outlet pipe. The cooling water cools the cooling plate, causing excess water vapor in the rising gas to condense at the bottom of the cooling plate. The scraped cooling water falls into the interior of the conical cover, further cooling the conical cover, causing the rising gas to form condensate outside the conical cover. Furthermore, this condensate contains a certain amount of ammonia water, which can also adsorb carbon dioxide in the rising gas, reducing the carbon dioxide content in the rising gas. The rising exhaust gas is transported through the air inlet, connecting sleeve, and outlet pipe to subsequent external gas treatment equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 For the present invention Figure 1 Bottom view of

[0023] Figure 3 This is a schematic diagram of the structure of the circulation components of the present invention;

[0024] Figure 4 This is an exploded view of the stirring component structure of the present invention;

[0025] Figure 5 For the present invention Figure 4 Bottom view of

[0026] Figure 6 For the present invention Figure 4 A magnified view of middle A;

[0027] Figure 7 This is a bottom view of the air outlet ring disc structure of the present invention;

[0028] Figure 8 This is an exploded view of the support frame, capture tank and cover structure of the present invention.

[0029] In the figure: 1, support frame; 2, capture tank; 3, air inlet pipe; 4, circulation component; 41, atomizing nozzle; 42, annular pipe; 43, liquid outlet pipe; 44, circulation pump; 45, liquid inlet pipe; 46, T-type filter plate; 5, sealing plate; 6, stirring component; 61, variable frequency stirring motor; 62, mounting frame; 63, air inlet hole; 64, cooling water outlet pipe; 65, cooling plate; 66, cone cover; 67, discharge pipe; 68, Stirring rod; 69, stirring plate; 610, mixing rod; 611, cleaning brush plate 2; 612, cleaning slider; 613, cooling water inlet pipe; 614, air outlet pipe; 615, connecting sleeve; 616, cleaning brush plate 1; 617, connecting column; 618, connecting disk; 619, connecting block; 7, cover; 8, liquid injection pipe; 9, liquid discharge pipe; 10, solenoid valve; 11, air outlet; 12, air outlet ring disk; 13, conical arc surface. DETAILED DESCRIPTION

[0030] See also Figures 1-8 A carbon dioxide capture device based on carbon neutrality includes a capture tank 2, a support frame 1 is provided on the bottom of the outside of the capture tank 2, a cover body 7 is placed on the top of the capture tank 2, and a stirring component 6 is installed on the top of the cover body 7 and the inside of the capture tank 2. An air inlet pipe 3 and a liquid injection pipe 8 are respectively installed on the outside of the capture tank 2. One side of the air inlet pipe 3 passes through the interior of the capture tank 2 and is connected to an air outlet ring disk 12. A plurality of air outlet holes 11 are provided at the bottom of the air outlet ring disk 12. A drain pipe 9 is installed at the bottom of the capture tank 2, and an electromagnetic valve 10 is installed on the drain pipe 9. A circulation component 4 is installed at the bottom of the capture tank 2.

[0031] The inner wall of the support frame 1 is provided with a conical arc surface 13, the bottom of the outside of the capture tank 2 is conical, and the top of the outside of the capture tank 2 and the bottom of the outside of the cover body 7 are fixedly sleeved with a sealing disk 5, and the upper and lower sealing disks 5 are fixedly connected by a number of bolts; the conical arc surface 13 increases the contact area between the capture tank 2 and the support frame 1, and improves the stability of the placement of the capture tank 2; through the cooperation of the upper and lower sealing disks 5 and a number of bolts, the connection between the capture tank 2 and the cover body 7 can be sealed, and the cover body 7 can be positioned and installed at the same time to prevent the cover body 7 from detaching from the capture tank 2.

[0032] The side of the air inlet pipe 3 away from the capture tank 2 is connected to the external gas pipeline through a flange, the side of the liquid injection pipe 8 away from the capture tank 2 is connected to the external liquid transmission pipe through a flange, and the side of the liquid discharge pipe 9 away from the capture tank 2 is connected to the external liquid transmission pipeline through a flange; the gas transmission pipeline is used for transporting gas; the liquid injection pipe 8 is used to inject ammonia water into the capture tank 2; and the liquid discharge pipe 9 is used to discharge the enriched liquid.

[0033] The circulation component 4 includes a circulation pump 44, which is located below the support frame 1. The liquid inlet end of the circulation pump 44 is connected to a liquid inlet pipe 45. The side of the liquid inlet pipe 45 away from the circulation pump 44 passes through the bottom of the inner wall of the capture tank 2. The top of the inner wall of the liquid inlet pipe 45 is threadedly connected to a T-shaped filter screen plate 46; the liquid entering the liquid inlet pipe 45 can be filtered through the T-shaped filter screen plate 46.

[0034] The liquid outlet end of the circulation pump 44 is connected to a liquid outlet pipe 43, the top of the liquid outlet pipe 43 is connected to an annular tube 42, the inner wall of the annular tube 42 is connected to a plurality of atomizing nozzles 41, and the inner side of the atomizing nozzle 41 passes through the interior of the capture tank 2; the annular tube 42 is sleeved on the outside of the capture tank 2, and the atomized ammonia water is conveniently sprayed into the capture tank 2 through the atomizing nozzle 41.

[0035] The stirring component 6 includes a mounting frame 62 and a conical cover 66. The bottom of the mounting frame 62 is connected to the top of the cover body 7. The interior of the mounting frame 62 is penetrated by a variable frequency stirring motor 61. The output end of the variable frequency stirring motor 61 is connected to a connecting disk 618. The bottom of the connecting disk 618 is connected to a connecting column 617. The bottoms of both sides of the outside of the connecting column 617 are connected to connecting blocks 619. The outsides of the two connecting blocks 619 are commonly connected to a stirring rod 68. The bottom of the stirring rod 68 passes through the cover body 7 and extends to the bottom of the inside of the collection tank 2. Through the cooperation of the connecting disk 618, the connecting column 617 and the connecting block 619, the output end of the variable frequency stirring motor 61 is conveniently connected to the stirring rod 68, and the stirring rod 68 can be driven to rotate when the variable frequency stirring motor 61 is running.

[0036] Several air inlet holes 63 are provided at the top of the outside of the stirring rod 68. The top of the outside of the stirring rod 68 and the bottom of the output end of the variable frequency stirring motor 61 are both provided with a connecting sleeve 615 through a sealed bearing. The outside of the connecting sleeve 615 is connected to an air outlet pipe 614. The side of the air outlet pipe 614 away from the connecting sleeve 615 is connected to the pipeline of the external gas treatment equipment through a flange. The part of the stirring rod 68 located at the top of the air inlet hole 63 is a hollow structure. Through the cooperation of the air inlet hole 63, the connecting sleeve 615 and the air outlet pipe 614, the excess gas in the capture tank 2 can be discharged to avoid damage caused by excessive air pressure in the capture tank 2.

[0037] A cooling plate 65 is provided on the top of the outside of the stirring rod 68 through a bearing movable sleeve. The right side of the outside of the cooling plate 65 is connected to a cooling water inlet pipe 613, and the right side of the cooling water inlet pipe 613 passes through the capture tank 2. The left side of the outside of the cooling plate 65 is connected to a cooling water outlet pipe 64, and the left side of the cooling water outlet pipe 64 passes through the capture tank 2. The cooling water inlet pipe 613 and the cooling water outlet pipe 64 are connected to the external cooling water circulation system on the side away from the cooling plate 65. The tops of the left and right sides of the outside of the stirring rod 68 are connected to a cleaning brush plate 616, and the top of the cleaning brush plate 616 is in contact with the bottom of the cooling plate 65; the floating gas can be cooled by the cooling plate 65, so that the water vapor inside the gas condenses and adheres to it, and the cleaning brush plate 616 can be used to scrape off the condensed water at the bottom of the cooling plate 65 when it rotates.

[0038] The conical cover 66 is sleeved on the outside of the stirring rod 68, and the bottom of the conical cover 66 is connected to the discharge pipe 67. The top of the outside of the conical cover 66 is connected to the inner wall of the capture tank 2. The bottoms of the left and right sides of the outside of the stirring rod 68 are respectively connected to the stirring plate 69 and the cleaning brush plate 2 611. Several mixing rods 610 are connected between the stirring plate 69 and the cleaning brush plate 2 611. The left and right sides of the top of the cleaning brush plate 2 611 are connected to the cleaning slider 612; the inner wall of the cleaning slider 612 is in sliding contact with the outside of the air outlet ring disk 12.

[0039] A method for using a carbon-neutral carbon dioxide capture device, comprising the above-mentioned carbon-neutral carbon dioxide capture device, and the method of using the device further comprising the following steps:

[0040] Step 1: Ammonia water from the outside is injected into the capture tank 2 through the injection pipe 8. The combustion exhaust gas of the power generation enterprise is injected into the capture tank 2 through the air inlet pipe 3 after being filtered. The exhaust gas is evenly discharged from the multiple outlet holes 11 at the bottom of the outlet ring plate 12.

[0041] Step 2: During the exhaust gas injection process, the CO2 capture device's external control terminal controls the variable-frequency stirring motor 61, rotating the stirring rod 68. Simultaneously, the circulation pump 44 is activated, pumping ammonia solution from the bottom of the inner wall of the capture tank 2 through the liquid inlet pipe 45 and ultimately spraying it out of the atomizing nozzle 41. Simultaneously, the external cooling water circulation system operates, allowing cooling water to enter the cooling disk 65 through the cooling water inlet pipe 613 and then flow back to the cooling water circulation system through the cooling water outlet pipe 64.

[0042] Step 3: When the mixture of ammonia water and carbon dioxide reaches the set value, the operation of the device is stopped, and the solenoid valve 10 is opened to discharge the enriched liquid through the drain pipe 9.

[0043] During use, ammonia water from the outside is injected into the capture tank 2 through the injection pipe 8. The injection is stopped when the injection amount reaches the rated value. The combustion exhaust gas of the power generation enterprise is injected into the capture tank 2 through the air inlet pipe 3 after being filtered. The exhaust gas is evenly discharged from the multiple outlet holes 11 at the bottom of the outlet ring plate 12, which can allow the carbon dioxide in the exhaust gas to react with the ammonia water.

[0044] During the exhaust gas injection process, the external control terminal of the carbon dioxide capture device is used to control the variable frequency stirring motor 61 to operate, driving the stirring rod 68 to rotate. At this time, the stirring plate 69, mixing rod 610 and cleaning brush plate 2 611 rotate to stir the ammonia solution, allowing the ammonia solution to fully react with the carbon dioxide. At the same time, the circulation pump 44 is turned on, and the ammonia solution at the bottom of the inner wall of the capture tank 2 is extracted using the liquid inlet pipe 45, and finally sprayed from the atomizing nozzle 41, so that the sprayed atomized ammonia solution reacts with the residual carbon dioxide in the floating gas, reducing the carbon dioxide content in the floating gas. At the same time, the external cooling water circulation system is running, allowing the external cooling water to enter the cooling disk 65 through the cooling water inlet pipe 613, and then flow back to the cooling water circulation system through the cooling water outlet pipe 64. The cooling water is used to cool the cooling disk 65, so that the excess water vapor in the floating gas will condense at the bottom of the cooling disk 65 and be scraped off by the rotating cleaning brush plate 1 616. The scraped cooling water falls into the inside of the conical cover 66, and can also cool the conical cover 66, so that the floating gas also forms condensed water outside the conical cover 66, and the condensed water in the conical cover 66 falls through the discharge pipe 67; further, these condensed waters contain a certain amount of ammonia water, which can also absorb carbon dioxide in the floating gas, reducing the carbon dioxide content in the floating gas; the floating exhaust gas is transported into the subsequent external gas treatment equipment through the air inlet 63, the connecting sleeve 615 and the outlet pipe 614.

[0045] During the rotation of cleaning brush plate 1 616, the bottom of the cooling disk 65 is cleaned to prevent impurities from accumulating on the bottom, thereby reducing condensation efficiency. Furthermore, during the rotation of cleaning brush plate 2 611, the bottom of the inner wall of the capture tank 2 is also cleaned to prevent the formation of precipitated impurities. The rotation of cleaning brush plate 2 611 drives cleaning slider 612 to rotate, which is used to clean the bottom of the outer surface of the outlet ring disk 12 to prevent the outlet hole 11 from being clogged by impurities. Furthermore, during the operation of circulating pump 44, liquid entering the liquid inlet pipe 45 is filtered by T-type filter plate 46 to prevent the atomizing nozzle 41 from being clogged. The rotating cleaning brush plate 2 611 also cleans T-type filter plate 46 to prevent it from being clogged. When the mixture of ammonia and carbon dioxide reaches the set value, the device stops operating, and the solenoid valve 10 is opened to discharge the enriched liquid through the drain pipe 9.

[0046] To sum up: the carbon neutrality-based carbon dioxide capture device and method, through the use of the stirring component 6, solves the problem that the exhaust gas is not treated when it is discharged, and the residual water and carbon dioxide contained in the exhaust gas are discharged together, resulting in a large consumption of solution and low carbon dioxide capture efficiency.

Claims

1. A carbon neutral carbon dioxide capture device, comprising a capture tank (2), characterized in that: The bottom of the outside of the capture tank (2) is sleeved with a support frame (1), a cover body (7) is placed on the top of the capture tank (2), and a stirring component (6) is installed on the top of the cover body (7) and the inside of the capture tank (2). An air inlet pipe (3) and a liquid injection pipe (8) are respectively installed on the outside of the capture tank (2), one side of the air inlet pipe (3) passes through the inside of the capture tank (2) and is connected to an air outlet ring disk (12), and a plurality of air outlet holes (11) are opened at the bottom of the air outlet ring disk (12). A drain pipe (9) is installed at the bottom of the capture tank (2), and a solenoid valve (10) is installed on the drain pipe (9). A circulation component (4) is installed at the bottom of the capture tank (2).

2. A carbon neutral carbon dioxide capture device according to claim 1, characterized in that: The inner wall of the support frame (1) is provided with a conical arc surface (13), the bottom of the outside of the capture tank (2) is conical, and the top of the outside of the capture tank (2) and the bottom of the outside of the cover body (7) are both fixedly sleeved with a sealing disk (5), and the upper and lower sealing disks (5) are fixedly connected by a plurality of bolts.

3. The carbon neutral carbon dioxide capture device according to claim 1, characterized in that: The side of the air inlet pipe (3) away from the capture tank (2) is connected to an external air delivery pipeline through a flange, the side of the liquid injection pipe (8) away from the capture tank (2) is connected to an external liquid delivery pipeline through a flange, and the side of the liquid discharge pipe (9) away from the capture tank (2) is connected to an external liquid delivery pipeline through a flange.

4. The carbon neutral carbon dioxide capture device according to claim 1, characterized in that: The circulation component (4) includes a circulation pump (44), which is located below the support frame (1). The liquid inlet end of the circulation pump (44) is connected to a liquid inlet pipe (45). The side of the liquid inlet pipe (45) away from the circulation pump (44) passes through the bottom of the inner wall of the capture tank (2). The top of the inner wall of the liquid inlet pipe (45) is threadedly connected to a T-shaped filter screen plate (46).

5. A carbon neutral carbon dioxide capture device according to claim 4, characterized in that: The liquid outlet end of the circulation pump (44) is connected to a liquid outlet pipe (43), the top of the liquid outlet pipe (43) is connected to an annular pipe (42), the inner wall of the annular pipe (42) is connected to a plurality of atomizing nozzles (41), and the inner side of the atomizing nozzles (41) penetrates into the interior of the capture tank (2).

6. The carbon neutral carbon dioxide capture device according to claim 1, characterized in that: The stirring component (6) includes a mounting frame (62) and a conical cover (66). The bottom of the mounting frame (62) is connected to the top of the cover (7). A variable frequency stirring motor (61) is installed inside the mounting frame (62). The output end of the variable frequency stirring motor (61) is connected to a connecting disk (618). The bottom of the connecting disk (618) is connected to a connecting column (617). The bottoms of both sides of the outside of the connecting column (617) are connected to connecting blocks (619). The outsides of the two connecting blocks (619) are commonly connected to a stirring rod (68). The bottom of the stirring rod (68) passes through the cover (7) and extends to the bottom of the inside of the capture tank (2).

7. A carbon neutral carbon dioxide capture device according to claim 6, characterized in that: The top of the outside of the stirring rod (68) is provided with a plurality of air inlet holes (63), and the top of the outside of the stirring rod (68) and the bottom of the output end of the variable frequency stirring motor (61) are both provided with a connecting sleeve (615) through a sealed bearing. The outside of the connecting sleeve (615) is connected to an air outlet pipe (614), and the side of the air outlet pipe (614) away from the connecting sleeve (615) is connected to the pipeline of the external gas processing equipment through a flange.

8. The carbon neutral carbon dioxide capture device according to claim 6, characterized in that: The top of the outside of the stirring rod (68) is provided with a cooling plate (65) through a bearing movable sleeve, the right side of the outside of the cooling plate (65) is connected to a cooling water inlet pipe (613), the right side of the cooling water inlet pipe (613) passes through the capture tank (2), the left side of the outside of the cooling plate (65) is connected to a cooling water outlet pipe (64), the left side of the cooling water outlet pipe (64) passes through the capture tank (2), the sides of the cooling water inlet pipe (613) and the cooling water outlet pipe (64) away from the cooling plate (65) are connected to the external cooling water circulation system, and the tops of the left and right sides of the outside of the stirring rod (68) are connected to a cleaning brush plate (616), and the top of the cleaning brush plate (616) is in contact with the bottom of the cooling plate (65).

9. The carbon neutral carbon dioxide capture device according to claim 6, characterized in that: The conical cover (66) is sleeved on the outside of the stirring rod (68), the bottom of the conical cover (66) is connected to the discharge pipe (67), the top of the outside of the conical cover (66) is connected to the inner wall of the capture tank (2), the bottoms of the left and right sides of the outside of the stirring rod (68) are respectively connected to the stirring plate (69) and the second cleaning brush plate (611), a plurality of mixing rods (610) are connected between the stirring plate (69) and the second cleaning brush plate (611), and the left and right sides of the top of the second cleaning brush plate (611) are connected to the cleaning sliders (612).

10. The method of claim 1, wherein: The method comprises the carbon neutrality-based carbon dioxide capture device according to claims 1 to 9 above, and the method of use further comprises the following steps: Step 1: Ammonia water from the outside is injected into the capture tank (2) through the injection pipe (8), and the combustion exhaust gas of the power generation enterprise is injected into the capture tank (2) through the air inlet pipe (3) after being filtered. The exhaust gas is evenly discharged from the multiple outlet holes (11) at the bottom of the outlet ring plate (12); Step 2: During the exhaust gas injection process, the variable frequency stirring motor (61) is controlled by the external control terminal of the carbon dioxide capture device to rotate, thereby driving the stirring rod (68). At the same time, the circulation pump (44) is turned on, and the ammonia water at the bottom of the inner wall of the capture tank (2) is extracted through the liquid inlet pipe (45) and finally sprayed out from the atomizing nozzle (41). At the same time, the external cooling water circulation system is running, so that the external cooling water enters the cooling disk (65) through the cooling water inlet pipe (613), and then flows back to the cooling water circulation system through the cooling water outlet pipe (64); Step 3: When the mixture of ammonia water and carbon dioxide reaches the set value, the operation of the device is stopped, and the solenoid valve (10) is opened to discharge the enriched liquid through the drain pipe (9).

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