Carbon dioxide absorption reactor based on carbon neutralization

Abstract

The utility model relates to a carbon dioxide absorption reactor based on carbon neutralization, which relates to the technical field of pollution treatment equipment and comprises a reaction tank and air inlet covers fixedly mounted on the front and rear side walls of the reaction tank, air inlet fans are fixedly mounted on the side walls of the air inlet covers, and a filter plate is movably arranged on the upper end face of the reaction tank. An inner cavity of the reaction tank is filled with ammonia water liquid, a stirring piece is arranged in the reaction tank, a connecting rod arranged on the inner wall of the reaction tank in a sleeving manner is arranged outside the reaction tank, a driving piece is arranged outside the reaction tank, an output shaft of the driving piece is in transmission with the connecting rod, a limiting piece is arranged on the connecting rod, and the stirring piece is driven by the limiting piece to rotate in the circumferential direction; a reciprocating transmission assembly is further arranged on the inner wall of the end, away from the driving part, of the reaction tank, the stirring part is driven by the reciprocating transmission assembly to axially move in the circumferential rotation process, high-concentration ammonia water and a low-concentration solution after reaction can be rapidly mixed, and the uniformity of the concentration of the ammonia water in the whole reaction tank is improved.

Description

Technical Field

[0001] This application relates to the field of pollution control equipment technology, and in particular to a carbon dioxide absorption reactor based on carbon neutrality. Background Technology

[0002] For marine ecological protection and restoration projects, by carrying out the conservation of wild daffodils, the island's sewage and ecological restoration treatment capacity can be improved. Through carbon-neutral pollution control equipment, pollutants such as waste gas, wastewater, and solid waste can be treated, while carbon dioxide can be captured, converted, or utilized through technical means. Ultimately, the synergistic effect of "pollution control" and "carbon reduction" can be achieved, which is in line with the core requirements of the "carbon neutrality" strategy of "coordinated promotion of source emission reduction, process control, end-of-pipe treatment and carbon sink enhancement".

[0003] Currently, Chinese invention patent application CN118698304B, published on March 14, 2025, discloses a carbon dioxide capture device, including a reaction tank and an air inlet hood fixedly installed on the front and rear side walls of the reaction tank. An air inlet fan is fixedly installed on the side wall of the air inlet hood. The inner cavity of the reaction tank is filled with ammonia solution. The device also includes a threaded rod rotatably installed on the inner side wall of the reaction tank, with a movable seat threadedly installed in the middle of the side wall of the threaded rod; a mixing component disposed on the side wall of the movable seat; a driving component disposed on the front side wall of the reaction tank; and a liquid dosing component disposed on the rear side wall of the reaction tank. Through the cooperation of the mixing component and the driving component, the ammonia solution in the reaction tank is thoroughly mixed and stirred to ensure the uniformity of ammonia concentration throughout the reaction tank, thereby effectively improving the efficiency and quality of the entire device in absorbing carbon dioxide from the air.

[0004] In the carbon dioxide capture device of the related technology, during the mixing of ammonia water in the reaction tank, only one mixing component is used to circulate back and forth in the reaction tank. This is inefficient and leads to uneven concentration. The absorption reaction of ammonia water to carbon dioxide follows the concentration-driven principle. When the local ammonia water concentration is too low, its reactivity with carbon dioxide decreases significantly. Even if carbon dioxide from the air is continuously introduced, it is difficult to fully chemically combine. As a result, some carbon dioxide is not absorbed and escapes directly from the reaction tank, causing waste of raw materials and a reduction in capture rate. Conversely, in areas where the ammonia water concentration is too high, the reaction products are prone to local supersaturation. Crystals may precipitate on the tank wall, the surface of the mixing component, or the bottom of the tank. This not only consumes excessive ammonia water medium but may also block the air inlet, stirring blades, or subsequent medium circulation pipelines, further deteriorating the operational stability of the system.

[0005] Therefore, it is necessary to propose a carbon dioxide absorption reactor based on carbon neutrality to solve the above problems. Utility Model Content

[0006] This application provides a carbon dioxide absorption reactor based on carbon neutralization, in order to improve the technical problem in related technologies where slow mixing efficiency leads to uneven concentration, thereby affecting the efficiency and quality of the entire device in absorbing carbon dioxide from the air.

[0007] This application provides a carbon dioxide absorption reactor based on carbon neutralization, including a reaction tank and an air inlet hood fixedly installed on the front and rear side walls of the reaction tank. An air inlet fan is fixedly installed on the side wall of the air inlet hood. A filter plate is movably arranged on the upper end face of the reaction tank. The inner cavity of the reaction tank is filled with ammonia solution. A stirring element is arranged inside the reaction tank and sleeved on a connecting rod on the inner wall of the reaction tank. A driving element is arranged outside the reaction tank. The output shaft of the driving element is driven by the connecting rod. A limiting element is arranged on the connecting rod. The stirring element is driven to rotate circumferentially by the limiting element. A reciprocating transmission assembly is also arranged on the inner wall of the reaction tank at the end away from the driving element. During the circumferential rotation, the stirring element is driven to move axially by the reciprocating transmission assembly.

[0008] The technical solutions described above in this application embodiment have at least the following technical effects: During the process of absorbing carbon dioxide from the atmosphere using a carbon dioxide absorption reaction tank, the carbon dioxide in the air is absorbed by the ammonia solution in the reaction tank, and the remaining gas is released from the filter plate above. At the same time, while the driving component drives the stirring component to rotate circumferentially, the reciprocating transmission component drives its axial back-and-forth movement. The stirring component has a large volume, which makes the stirring efficiency of the ammonia solution in the reaction tank higher and the concentration more uniform.

[0009] In this embodiment, the stirring component includes a central tube and stirring racks disposed at both ends of the central tube. A transmission rod is also disposed at the end of the stirring rack away from the central tube. The reciprocating transmission assembly includes a connecting pipe disposed on the inner wall of the reaction tank. A threaded groove is provided on the inner wall of the connecting pipe. The transmission rod passes through the connecting pipe. A fixing pin is disposed on the outer surface of the transmission rod. The fixing pin is driven within the threaded groove.

[0010] This technical solution allows the agitator to rotate circumferentially by limiting components on the central tube and connecting rod. Simultaneously, the movement of the fixed pin on the transmission rod within the threaded groove of the connecting tube causes the agitator to move back and forth axially. This circumferential rotation drives the axial movement, transforming a single circumferential driving force into a composite motion of circumferential rotation and axial reciprocating movement of the agitator, achieving the effect of dual motion with a single driving force.

[0011] In this embodiment, the limiting member is at least one rectangular block arranged in a circumferential array on the outer wall of the connecting rod, and the inner wall of the central tube is provided with a limiting groove corresponding to the position of the limiting member.

[0012] This technical solution uses a rectangular block to limit the movement of the central tube, allowing it to rotate circumferentially without affecting its forward and backward displacement in the axial direction, while also serving as a motion guide.

[0013] In this embodiment, the driving component is a motor mounted on the outer wall of the reaction tank, a first pulley coaxially driven with the motor output shaft, and a second pulley coaxially driven with the connecting rod. The first pulley and the second pulley are synchronously driven coaxially via a belt.

[0014] This technical solution uses the coaxial synchronous transmission of the first pulley, the second pulley, and the belt to avoid direct contact between the motor's output shaft and the ammonia solution, thus preventing corrosion. The motor must be installed on the outer wall of the reaction tank to avoid contact with corrosive ammonia water, ensuring the motor's lifespan and electrical safety.

[0015] In this embodiment, the motor is a servo motor, and its rotation direction is changed according to the duration of the transmission of the fixing pin in the threaded groove.

[0016] Through this technical solution, in the stirring system of the CO absorption reactor, the servo motor combined with the steering control logic of the fixed pin transmission time is essentially a precise motion stroke closed-loop control mechanism. Its core function is to solve the problem of stroke limit and automatic reversing of the axial reciprocating movement of the stirring component by using the programmability and steering controllability of the servo motor.

[0017] In this embodiment, an air outlet pipe extending into the inner cavity of the reaction tank is fixedly installed in the inner cavity of the air inlet hood, and a one-way air valve with an outlet to the outside is provided in the inner cavity of the air outlet pipe. An electric heater is fixedly installed on the inner wall of the reaction tank.

[0018] Through this technical solution, the gas guiding and anti-backflow control mechanism of the reaction tank, through the air inlet hood, air outlet pipe and one-way air valve, has the core function of ensuring that carbon dioxide in the atmosphere enters the reaction tank efficiently and unidirectionally, while blocking the reverse leakage of gas or liquid in the tank. At the same time, it promotes the optimal temperature for the reaction between ammonia solution and carbon dioxide by heating the ammonia solution in the reaction tank.

[0019] In this embodiment, a drain pipe is provided on the bottom wall of the reaction tank, extending into the inner cavity of the reaction tank, and a solenoid valve for controlling the opening and closing is provided on the drain pipe.

[0020] This technical solution allows for easy replacement of the ammonia solution in the reaction tank and easy cleaning of the inner wall of the reaction tank via a solenoid valve on the drain pipe at the bottom of the reaction tank. Attached Figure Description

[0021] Figure 1 A three-dimensional structural schematic diagram of a carbon dioxide absorption reactor based on carbon neutralization provided for an embodiment of this application;

[0022] Figure 2 A schematic diagram of the exploded structure of a carbon dioxide absorption reactor based on carbon neutralization provided in an embodiment of this application;

[0023] Figure 3 A three-dimensional structural schematic diagram of the stirring component provided in the embodiments of this application;

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a cross-sectional structural diagram of the reaction tank provided in an embodiment of this application.

[0026] The following are the labeling elements in the figure:

[0027] 1. Reaction tank; 11. Drain pipe; 2. Air inlet hood; 21. Air inlet fan; 22. Filter plate; 23. Air outlet pipe; 3. Stirring component; 31. Central tube; 32. Stirring frame; 33. Transmission rod; 34. Connecting rod; 4. Drive component; 41. Motor; 42. First pulley; 43. Second pulley; 44. Belt; 5. Limiting component; 51. Limiting groove; 6. Reciprocating transmission assembly; 61. Connecting pipe; 62. Threaded groove; 63. Fixing pin; 7. Electric heater. Detailed Implementation

[0028] In the carbon dioxide capture device of the related technology, during the mixing of ammonia water in the reaction tank, only one mixing component is used to circulate back and forth in the reaction tank. This is inefficient and leads to uneven concentration. The absorption reaction of ammonia water to carbon dioxide follows the concentration-driven principle. When the local ammonia water concentration is too low, its reactivity with carbon dioxide decreases significantly. Even if carbon dioxide from the air is continuously introduced, it is difficult to fully chemically combine. As a result, some carbon dioxide is not absorbed and escapes directly from the reaction tank, causing waste of raw materials and a reduction in capture rate. Conversely, in areas where the ammonia water concentration is too high, the reaction products are prone to local supersaturation. Crystals may precipitate on the tank wall, the surface of the mixing component, or the bottom of the tank. This not only consumes excessive ammonia water medium but may also block the air inlet, stirring blades, or subsequent medium circulation pipelines, further deteriorating the operational stability of the system.

[0029] Based on this, in order to improve the technical problem in the related technology that the slow mixing efficiency leads to uneven concentration, thereby affecting the efficiency and quality of the entire device in absorbing carbon dioxide from the air, the embodiments of this application provide the following solutions.

[0030] Please refer to the following: Figures 1 to 5 This application provides a carbon dioxide absorption reactor based on carbon neutralization. The carbon dioxide absorption reactor based on carbon neutralization includes a reaction tank 1 and an air inlet hood 2 fixedly installed on the front and rear side walls of the reaction tank 1. An air inlet fan 21 is fixedly installed on the side wall of the air inlet hood 2. A filter plate 22 is movably arranged on the upper end face of the reaction tank 1. The inner cavity of the reaction tank 1 is filled with ammonia solution. A stirring element 3 is arranged inside the reaction tank 1 and a connecting rod 34 is sleeved on the inner wall of the reaction tank 1. A driving element 4 is arranged outside the reaction tank 1. The output shaft of the driving element 4 is driven by the connecting rod 34. A limiting element 5 is arranged on the connecting rod 34. The stirring element 3 is driven to rotate circumferentially through the limiting element 5. A reciprocating transmission assembly 6 is also arranged on the inner wall of the reaction tank 1 away from the driving element 4. During the circumferential rotation, the stirring element 3 is driven to move axially through the reciprocating transmission assembly 6.

[0031] The carbon dioxide absorption reactor based on carbon neutralization provided in this application embodiment absorbs carbon dioxide from the atmosphere using a carbon dioxide absorption reaction tank 1. The ammonia solution within the reaction tank 1 absorbs the carbon dioxide from the air, while the remaining gas is released through the upper filter plate 22. Simultaneously, the driving component 4 drives the stirring component 3 to rotate circumferentially, while the reciprocating transmission assembly 6 drives its axial back-and-forth movement. The stirring component 3 has a large volume, resulting in higher efficiency in stirring the ammonia solution in the reaction tank 1 and a more uniform concentration. Thus, the combined circumferential and axial movements of the large-volume stirring component 3 can cover a larger solution area: circumferential rotation drives overall liquid circulation, while axial movement breaks down concentration stratification (top-to-bottom or front-to-back), pushing high-concentration ammonia solution to the reaction zone. Simultaneously, it rapidly mixes the low-concentration solution after reaction with the unreacted high-concentration solution, ensuring that the ammonia concentration in the entire reaction tank 1 remains uniform and that every portion of ammonia solution efficiently participates in CO2 absorption.

[0032] In this embodiment, the stirring component 3 includes a central tube 31 and stirring racks 32 disposed at both ends of the central tube 31. A transmission rod 33 is also disposed at the end of the stirring rack 32 away from the central tube 31. The reciprocating transmission assembly 6 includes a connecting pipe 61 disposed on the inner wall of the reaction tank 1. A threaded groove 62 is provided on the inner wall of the connecting pipe 61. The transmission rod 33 passes through the connecting pipe 61. A fixing pin 63 is disposed on the outer surface of the transmission rod 33. The fixing pin 63 is drivenly disposed in the threaded groove 62.

[0033] With this configuration, the stirring element 3 is circumferentially limited to rotate by the limiting element 5 on the central tube 31 and the connecting rod 34. Simultaneously, the movement of the fixed pin 63 on the transmission rod 33 within the threaded groove 62 of the connecting tube 61 causes the stirring frame 32 to move back and forth axially. This circumferential rotation drives the axial movement, transforming the single circumferential driving force into a composite motion of circumferential rotation and axial reciprocating movement of the stirring element 3, achieving the effect of dual motion with a single driving force. In this way, simple rotational stirring easily leads to the formation of concentric circular circulation in the solution, making it difficult to eliminate the axial concentration gradient. Axial reciprocating movement breaks this stratification. Through the disturbance of the stirring element 3 at different axial positions, the high-concentration ammonia water is rapidly mixed with the low-concentration solution after the reaction, improving the uniformity of ammonia water concentration throughout the reaction tank 1, preventing premature deterioration of local ammonia water, and maximizing the CO2 absorption per unit volume of ammonia water.

[0034] In this embodiment, the limiting member 5 is at least one rectangular block arranged in a circumferential array on the outer wall of the connecting rod 34, and the inner wall of the central tube 31 is provided with a limiting groove 51 corresponding to the position of the limiting member 5.

[0035] This configuration, using rectangular blocks to limit the movement of the central tube 31, allows it to rotate circumferentially without affecting its axial displacement, while also serving as a motion guide. The number of rectangular blocks can be flexibly adjusted according to torque requirements; two can be used for light loads, while four or more can be used for heavy loads, without altering the overall structure. The height and width of the rectangular blocks can be adapted to the diameter of the connecting rod 34 and the wall thickness of the central tube 31, ensuring strong compatibility.

[0036] In this embodiment, the driving component 4 is a motor 41 installed on the outer wall of the reaction tank 1, a first pulley 42 that is coaxially driven with the output shaft of the motor 41, and a second pulley 43 that is coaxially driven with the connecting rod 34. The first pulley 42 and the second pulley 43 are coaxially and synchronously driven by a belt 44.

[0037] This configuration, through the coaxial synchronous transmission of the first pulley 42, the second pulley 43, and the belt 44, avoids direct contact between the output shaft of the motor 41 and the ammonia solution, preventing corrosion. The motor 41 is installed on the outer wall of the reaction tank 1 to avoid contact with corrosive ammonia water, ensuring the motor's lifespan and electrical safety. Furthermore, if an overload occurs during the operation of the stirring system, such as the stirring element 3 being jammed by foreign objects or a sudden increase in solution viscosity leading to excessive resistance, the transmission between the pulleys and the belt 44 can slip, achieving self-protection.

[0038] In this embodiment, the motor 41 is a servo motor 41, which changes its rotation direction according to the duration of transmission of the fixing pin 63 in the threaded groove 62.

[0039] With this configuration, in the stirring system of the CO absorption reactor 1, the servo motor 41, combined with the steering control logic of the transmission time of the fixed pin 63, is essentially a precise closed-loop motion stroke control mechanism. Its core function is to solve the problem of stroke limit and automatic reversing of the axial reciprocating movement of the stirring component 3 through the programmability and steering controllability of the servo motor 41. In this way, the servo motor 41 has precise speed control and steering switching capabilities, which can avoid the inrush current and mechanical jerking during the reversing of the traditional motor 41.

[0040] In this embodiment, an air outlet pipe 23 extending into the inner cavity of the reaction tank 1 is fixedly installed in the inner cavity of the air inlet hood 2. A one-way valve with an outlet to the outside is provided in the inner cavity of the air outlet pipe 23. An electric heater 7 is fixedly installed on the inner wall of the reaction tank 1.

[0041] With this setup, the gas guiding and anti-backflow control mechanism of the reaction tank 1, through the air inlet hood 2, air outlet pipe 23, and one-way valve, has the core function of ensuring that carbon dioxide in the atmosphere enters the reaction tank 1 efficiently and unidirectionally, while blocking the reverse leakage of gas or liquid in the tank. At the same time, it promotes the optimal temperature for the reaction between ammonia solution and carbon dioxide by heating the ammonia solution in the reaction tank 1.

[0042] In this embodiment, a drain pipe 11 is provided on the bottom wall of the reaction tank 1, extending into the inner cavity of the reaction tank 1, and a solenoid valve for controlling the opening and closing is provided on the drain pipe 11.

[0043] This setup allows for easy replacement of the ammonia solution in reaction tank 1 and convenient cleaning of the inner wall of reaction tank 1 via the solenoid valve on the drain pipe 11 at the bottom wall of reaction tank 1. The drain pipe 11 extends to the bottom wall of reaction tank 1, allowing the discharge of deposited crystals or high-concentration product liquid from the bottom. Combined with the solenoid valve, it can be precisely opened via a preset program or manual control when the product concentration reaches a threshold, discharging the rich product solution after the reaction and making room for new high-concentration ammonia water, ensuring that reaction tank 1 continuously maintains its efficient carbon dioxide absorption capacity.

[0044] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A carbon dioxide absorption reactor based on carbon neutralization, comprising a reaction tank (1) and an air inlet hood (2) fixedly installed on the front and rear side walls of the reaction tank (1), wherein an air inlet fan (21) is fixedly installed on the side wall of the air inlet hood (2), a filter plate (22) is movably arranged on the upper end face of the reaction tank (1), and the inner cavity of the reaction tank (1) is filled with ammonia solution, characterized in that: A stirring element (3) is provided inside the reaction tank (1) and a connecting rod (34) is sleeved on the inner wall of the reaction tank (1). A driving element (4) is provided outside the reaction tank (1). The output shaft of the driving element (4) is driven by the connecting rod (34). A limiting element (5) is provided on the connecting rod (34). The stirring element (3) is driven to rotate circumferentially through the limiting element (5). A reciprocating transmission assembly (6) is also provided on the inner wall of the reaction tank (1) at the end away from the driving element (4). During the circumferential rotation, the stirring element (3) is driven to move axially through the reciprocating transmission assembly (6).

2. The carbon dioxide absorption reactor based on carbon neutralization according to claim 1, characterized in that: The stirring component (3) includes a central tube (31) and stirring racks (32) disposed at both ends of the central tube (31). A transmission rod (33) is also disposed at the end of the stirring rack (32) away from the central tube (31). The reciprocating transmission assembly (6) includes a connecting pipe (61) disposed on the inner wall of the reaction tank (1). A threaded groove (62) is provided on the inner wall of the connecting pipe (61). The transmission rod (33) passes through the connecting pipe (61). A fixing pin (63) is disposed on the outer surface of the transmission rod (33). The fixing pin (63) is driven in the threaded groove (62).

3. A carbon dioxide absorption reactor based on carbon neutralization according to claim 2, characterized in that: The limiting member (5) is at least one rectangular block arranged in a circumferential array on the outer wall of the connecting rod (34), and the inner wall of the central tube (31) is provided with a limiting groove (51) corresponding to the position of the limiting member (5).

4. A carbon dioxide absorption reactor based on carbon neutralization according to claim 3, characterized in that: The driving component (4) is a motor (41) installed on the outer wall of the reaction tank (1), a first pulley (42) coaxially driven with the output shaft of the motor (41), and a second pulley (43) coaxially driven with the connecting rod (34). The first pulley (42) and the second pulley (43) are coaxially and synchronously driven by a belt (44).

5. A carbon dioxide absorption reactor based on carbon neutralization according to claim 4, characterized in that: The motor (41) is a servo motor (41), and its rotation direction is changed according to the duration of the transmission of the fixed pin (63) in the threaded groove (62).

6. A carbon dioxide absorption reactor based on carbon neutralization according to claim 1, 2, 3, 4, or 5, characterized in that: The air inlet hood (2) is fixedly installed with an air outlet pipe (23) extending into the inner cavity of the reaction tank (1). The inner cavity of the air outlet pipe (23) is provided with a one-way valve that opens to the outside. An electric heater (7) is fixedly installed on the inner wall of the reaction tank (1).

7. A carbon dioxide absorption reactor based on carbon neutralization according to claim 1, 2, 3, 4, or 5, characterized in that: A drain pipe (11) is provided on the bottom wall of the reaction tank (1) extending into the inner cavity of the reaction tank (1), and a solenoid valve for controlling the opening and closing is provided on the drain pipe (11).

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