Supergravity carbon dioxide absorption device with low energy consumption
The supergravity carbon dioxide absorption device addresses high energy consumption in existing methods by using a lean-rich liquid heat exchanger and high-speed rotating blades to enhance contact area and temperature control, achieving efficient carbon dioxide capture with reduced energy use.
Patent Information
- Application Number
- CN202422821857.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-11-19
AI Technical Summary
Existing carbon dioxide absorption methods, such as the MDEA alcohol amine method, consume excessive energy due to the need for heating the MDEA solution to release absorbed carbon dioxide.
A supergravity carbon dioxide absorption device with a lean-rich liquid heat exchanger, supergravity absorber, desorber, and reboiler, utilizing high-speed rotating blades to enhance contact area and temperature control, along with a recycling system to minimize energy consumption.
The device achieves efficient carbon dioxide absorption and release at lower temperatures, reducing energy consumption by recycling heat and optimizing temperature control, thereby enhancing the carbon dioxide capture process.
Smart Images
Figure CN222219121U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a device for absorbing carbon dioxide, in particular to a supergravity carbon dioxide absorbing device with low energy consumption. Background Art
[0002] In industrial production, waste gas usually contains a certain amount of carbon dioxide and other harmful gases and particulate matter. In order to reduce the impact on the environment, measures need to be taken to capture and treat the carbon dioxide in these waste gases.
[0003] At present, it is common to use the MDEA alcohol amine method to absorb carbon dioxide, that is, by controlling the MDEA solution at a relatively low temperature, the MDEA solution absorbs the carbon dioxide in the exhaust gas, and then the MDEA solution containing the carbon dioxide is transferred to a high temperature environment, so that the MDEA solution releases the carbon dioxide. In this process, a large amount of heat is consumed to complete the heating of the MDEA solution, which results in high energy consumption. Utility Model Content
[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a supergravity carbon dioxide absorption device with low energy consumption.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: including a supergravity absorber, a lean-rich liquid heat exchanger, a supergravity desorber and a reboiler, the supergravity absorber having a gas inlet for exhaust gas to enter, a gas outlet for decarbonated waste gas to flow out, a liquid inlet for solution to flow in and a liquid outlet for solution to flow out, the lean-rich liquid heat exchanger having a rich liquid inlet, a rich liquid outlet, a lean liquid inlet and a lean liquid outlet, a rich liquid pipe connecting the rich liquid inlet and the rich liquid outlet, a lean liquid pipe connecting the lean liquid inlet and the lean liquid outlet, the rich liquid pipe and the lean liquid pipe having an exchange part for heat exchange, the liquid outlet and the rich liquid inlet are connected by a pipeline, the supergravity desorber having a solution inlet, a solution outlet and a discharge outlet, the rich liquid outlet is connected to the solution inlet by a pipeline, the solution outlet is connected to the lean liquid inlet by a pipeline, the lean liquid outlet is connected to the liquid inlet by a pipeline, and the reboiler heats the supergravity desorber.
[0006] By adopting the above technical scheme, at low temperatures, carbon dioxide can be absorbed by the solution in large quantities, and at high temperatures, carbon dioxide will be released from the solution. Therefore, in the supergravity absorber, the solution needs to be controlled at a relatively low temperature. After absorbing carbon dioxide, the solution temperature is initially increased through the lean-rich liquid heat exchanger. The object of the absorbed heat comes from the solution that has released all the carbon dioxide, and the solution that has released all the carbon dioxide needs to flow back into the supergravity absorber, requiring the solution temperature to be low, while the solution containing carbon dioxide needs to be heated. Therefore, the heat of the solution that has released all the carbon dioxide is transferred to the solution containing carbon dioxide, reducing the energy required to be provided by the reboiler, while reducing the degree to which the temperature of the solution that has released all the carbon dioxide needs to be lowered, thereby achieving the purpose of reducing energy consumption.
[0007] The utility model is further configured as follows: the supergravity absorption machine includes a machine body, a motor, a rotating rod and a liquid main pipe. The rotating rod is arranged in the machine body along the vertical rotation. The motor is arranged in the machine body and drives the rotating rod to rotate. The rotating rod is provided with a plurality of blades distributed vertically. The gas inlet is arranged on the side wall of the machine body and is located below the blades. The liquid main pipe is arranged outside the machine body and has a plurality of branch pipes opposite to the blades. The branch pipes are arranged obliquely in the machine body. The other end of the liquid main pipe relative to the branch pipe serves as a liquid inlet. The gas outlet is arranged at the top of the machine body, and the liquid outlet is arranged at the bottom of the machine body. The principle of the supergravity desorption machine is similar to that of the supergravity absorption machine. Both use high-speed rotating blades to atomize the solution to increase the contact area with carbon dioxide or high-temperature steam, thereby better dissolving or heating.
[0008] By adopting the above technical solution, during the process of carbon dioxide absorption, carbon dioxide rises from the bottom, while the solution falls from the top. When the solution falls on the high-speed rotating blades, it is broken into mist, increasing the contact area with carbon dioxide, so that carbon dioxide can be absorbed more easily.
[0009] The utility model is further configured as follows: it also includes a rich liquid tank and a liquid adding tank, the rich liquid pipe is arranged between the super gravity absorption machine and the lean and rich liquid heat exchanger, the liquid adding tank is connected with the rich liquid tank and the solution is added into the rich liquid tank.
[0010] By adopting the above technical solution, during the solution recycling process, a small amount of solution will still leave the circulation system with the waste gas or carbon dioxide even after passing through the first gas-liquid separator and the second gas-liquid separator, so the solution is added to the rich liquid tank through the liquid adding tank.
[0011] The utility model is further configured to include a first gas-liquid separator, a side of the first gas-liquid separator having a first connection port connected to a gas outlet, and a bottom of the first gas-liquid separator having a reflux port connected to a liquid inlet.
[0012] By adopting the above technical solution, after the decarbonated waste gas is discharged, the solution contained therein is separated through the first gas-liquid separator, thereby reducing the waste of solution and allowing more solution to enter the circulation absorption and discharge of carbon dioxide.
[0013] The utility model is further configured as follows: it also includes a first cooler and a second gas-liquid separator, the supergravity desorption machine has a liquid return port, the liquid return port is connected to the bottom end of the second gas-liquid separator, the discharge port is connected to the top end of the second gas-liquid separator, and the first cooler is arranged between the two and is used for cooling, and the second gas-liquid separator is also provided with a carbon dioxide gas port for discharging carbon dioxide.
[0014] By adopting the above technical solution, after the carbon dioxide is released, the carbon dioxide in a high temperature state is cooled by the first cooler, and then the solution contained in the carbon dioxide is separated by the second gas-liquid separator, thereby reducing the loss of the solution.
[0015] The utility model is further configured as follows: a second cooler for cooling the solution is arranged between the lean liquid outlet and the liquid inlet, the first cooler and the second cooler are essentially the same as the lean and rich liquid heat exchanger, and the cooling liquid is provided by the outside.
[0016] By adopting the above technical solution, the solution after passing through the lean-rich liquid heat exchanger needs to be cooled down additionally before entering the supergravity absorption machine because the temperature is still too high, so as to ensure that the temperature of the solution entering the supergravity absorption machine is controlled.
[0017] The utility model is further configured as follows: the reboiler is arranged between the supergravity desorber and the lean-rich liquid heat exchanger, the desorbent outlet and the lean liquid inlet are connected through the reboiler, and a heating pipe for heat supply is arranged on the reboiler.
[0018] By adopting the above technical solution, when the ultra-gravity desorber needs to be heated up, the reboiler transmits high-temperature steam into the ultra-gravity desorber, so that the high-temperature steam contacts the solution, thereby increasing the temperature of the solution, and the solution that has completed the release of carbon dioxide enters the reboiler, so that the temperature is further increased, thereby releasing the carbon dioxide that may not be released, and the carbon dioxide re-enters the ultra-gravity desorber following the high-temperature steam.
[0019] The utility model is further configured as follows: it also includes a blower, which inputs the exhaust gas into the supergravity absorber from the air inlet. The utility model is further configured as follows: S1, the exhaust gas containing carbon dioxide is driven by the blower and enters the machine body through the air inlet, and then rises in the machine body. At the same time, the solution enters from the liquid inlet, and the solution flows downward from the top of the machine body. In the machine body, the motor drives the rotating rod to drive the blades to rotate; S2, the exhaust gas containing carbon dioxide rises from the bottom of the machine body to the bottom of the machine body to become decarbonated exhaust gas, and passes through the air outlet, enters the first gas-liquid separator from the first connecting port, separates the solution contained in the decarbonated exhaust gas, and flows back to the machine body from the liquid inlet through the reflux port; the solution falls from the top of the machine body to the bottom of the machine body and absorbs carbon dioxide, and flows through the rich liquid tank, flows into the lean and rich liquid heat exchanger from the rich liquid inlet, performs heat exchange in the rich liquid pipe, preliminarily increases the solution temperature, and then flows out from the rich liquid outlet to the supergravity desorption machine; the liquid adding tank replenishes the solution in the rich liquid tank; S3, and then The boiler transfers the heated gas into the supergravity desorber to heat the solution, and the solution releases carbon dioxide. The carbon dioxide enters the first cooler through the exhaust port for cooling, and then enters the second gas-liquid separator to separate the solution contained in the carbon dioxide. The separated solution flows back to the supergravity desorber through the liquid return port, and the carbon dioxide is discharged from the carbon dioxide port; after the carbon dioxide is released, the solution in the supergravity desorber enters the reboiler through the solution outlet to be heated again, and the residual carbon dioxide in the solution is released again. The carbon dioxide and the gas heated by the reboiler are transferred to the supergravity desorber, and the solution enters the lean-rich liquid heat exchanger through the lean liquid inlet; S4, the solution in the lean-rich liquid heat exchanger exchanges heat with the rich liquid pipe in the lean liquid pipe, the solution temperature is reduced, and then enters the second cooler through the lean liquid outlet to be cooled again, and finally flows into the body from the liquid inlet. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the overall process flow of the utility model;
[0021] Figure 2 This is a simplified structural diagram of the super gravity absorption machine of the utility model.
[0022] In the figure: 1. supergravity absorption machine; 10. blower; 11. gas inlet; 12. gas outlet; 13. liquid inlet; 14. liquid outlet; 15. machine body; 16. motor; 17. rotating rod; 18. liquid main pipe; 181. branch pipe; 19. blade; 2. lean and rich liquid heat exchanger; 21. rich liquid inlet; 22. rich liquid outlet; 23. lean liquid inlet; 24. lean liquid outlet; 3. supergravity desorption machine; 31. desorption liquid inlet; 32. desorption liquid outlet; 33. discharge outlet; 34. liquid return port; 4. reboiler; 41. heating tube; 5. rich liquid tank; 6. liquid adding tank; 7. first gas-liquid separation; 71. first connecting port; 72. reflux port; 8. first cooler; 81. second gas-liquid separator; 82. carbon dioxide gas port; 9. second cooler. DETAILED DESCRIPTION
[0023] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0024] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0025] like Figure 1-2As shown, the utility model discloses a low-energy-consumption ultra-gravity carbon dioxide absorption device, comprising an ultra-gravity absorber 1, a lean-rich liquid heat exchanger 2, an ultra-gravity desorber 3 and a reboiler 4, the ultra-gravity absorber 1 having an air inlet 11 for waste gas to enter, an air outlet 12 for decarbonated waste gas to flow out, a liquid inlet 13 for solution to flow in and a liquid outlet 14 for solution to flow out, the lean-rich liquid heat exchanger 2 having a rich liquid inlet 21, a rich liquid outlet 22, a lean liquid inlet 23 and a lean liquid outlet 24, a rich liquid pipe connecting the rich liquid inlet 21 and the rich liquid outlet 22, a lean liquid pipe connecting the lean liquid inlet 23 and the lean liquid outlet 24, the rich liquid pipe and the lean liquid pipe having an exchange portion for heat exchange, the liquid outlet 14 and the rich liquid inlet 21 are connected by a pipeline, the ultra-gravity desorber 3 having a solution inlet 31, a solution outlet 32 and a discharge outlet 33, the rich liquid outlet 22 and the solution inlet 31 are connected by a pipeline, The solution outlet 32 is connected to the lean solution inlet 23 through a pipeline, and the lean solution outlet 24 is connected to the liquid inlet 13 through a pipeline. The reboiler 4 heats the supergravity desorber 3. At low temperatures, carbon dioxide can be absorbed by the solution in large quantities, and at high temperatures, carbon dioxide will be released from the solution. Therefore, in the supergravity absorber 1, it is necessary to control the solution at a relatively low temperature. After absorbing carbon dioxide, the solution temperature is initially increased through the lean-rich solution heat exchanger 2. The object of the absorbed heat comes from the solution that has released all the carbon dioxide, and the solution that has released all the carbon dioxide needs to flow back to the supergravity absorber 1, requiring the solution temperature to be low, while the solution containing carbon dioxide needs to be heated. Therefore, the heat of the solution that has released all the carbon dioxide is transferred to the solution containing carbon dioxide, reducing the energy required to be provided by the reboiler 4, while reducing the degree to which the temperature of the solution that has released all the carbon dioxide needs to be reduced, thereby achieving the purpose of reducing energy consumption.
[0026] The super gravity absorption machine 1 includes a machine body 15, a motor 16, a rotating rod 17 and a liquid main pipe 18. The rotating rod 17 is arranged in the machine body 15 to rotate vertically. The motor 16 is arranged in the machine body 15 and drives the rotating rod 17 to rotate. The rotating rod 17 is provided with a plurality of blades 19 distributed vertically. The air inlet 11 is arranged on the side wall of the machine body 15 and is located below the blades 19. The liquid main pipe 18 is arranged outside the machine body 15 and has a plurality of branch pipes 181 opposite to the blades 19. The branch pipes 181 are arranged obliquely in the machine body 15. The other end of the liquid main pipe 18 relative to the branch pipes 181 serves as a liquid inlet 13. The gas outlet 12 is arranged at the top of the machine body 15, and the liquid outlet 14 is arranged at the bottom of the machine body 15. The principle of the supergravity desorption machine 3 is similar to that of the supergravity absorption machine 1. Both use high-speed rotating blades 19 to atomize the solution to increase the contact area with carbon dioxide or high-temperature steam, so as to better dissolve or heat up. In the process of carbon dioxide absorption, carbon dioxide rises from bottom to top, while the solution falls from top to bottom. When the solution falls on the high-speed rotating blades 19, it is broken into mist, increasing the contact area with carbon dioxide, so that carbon dioxide can be absorbed more easily.
[0027] It also includes a rich liquid tank 5 and a liquid adding tank 6. The rich liquid pipe is arranged between the supergravity absorption machine 1 and the lean and rich liquid heat exchanger 2. The liquid adding tank 6 is connected to the rich liquid tank 5 and adds the solution into the rich liquid tank 5. In the process of solution recycling, a small amount of solution will still leave the circulation system with the waste gas or carbon dioxide even after passing through the first gas-liquid separator 7 and the second gas-liquid separator 81. Therefore, the solution is added to the rich liquid tank 5 through the liquid adding tank 6.
[0028] It includes a first gas-liquid separator 7, a side of which is provided with a first connecting port 71 connected to a gas outlet 12, a bottom of which is provided with a reflux port 72 connected to a liquid inlet 13, a first cooler 8 and a second cooler 9 are essentially the same as the lean-rich liquid heat exchanger 2, and the coolant is provided by the outside, and after the decarbonated waste gas is discharged, the solution contained therein is separated through the first gas-liquid separator 7, so as to reduce the waste of the solution and enable more solution to enter the circulation absorption and discharge of carbon dioxide.
[0029] It also includes a first cooler 8 and a second gas-liquid separator 81. The supergravity desorption machine 3 has a liquid return port 34, which is connected to the bottom end of the second gas-liquid separator 81. The discharge port 33 is connected to the top end of the second gas-liquid separator 81, and the first cooler 8 is arranged between the two and is used for cooling. The second gas-liquid separator 81 is also provided with a carbon dioxide gas port 82 for discharging carbon dioxide. After the carbon dioxide is released, the carbon dioxide in a high temperature state is cooled by the first cooler 8, and then the solution contained in the carbon dioxide is separated by the second gas-liquid separator 81 to reduce the loss of the solution.
[0030] A second cooler 9 for cooling the solution is provided between the lean liquid outlet 24 and the liquid inlet 13. The solution after passing through the lean-rich liquid heat exchanger 2 needs additional cooling before entering the supergravity absorption machine 1 because the temperature is still too high, so as to ensure that the temperature of the solution entering the supergravity absorption machine 1 is controlled.
[0031] The reboiler 4 is arranged between the supergravity desorber 3 and the lean-rich liquid heat exchanger 2. The solution outlet 32 and the lean liquid inlet 23 are connected through the reboiler 4. The reboiler 4 is provided with a heating pipe 41 for heat supply. When the supergravity desorber 3 needs to be heated, the reboiler 4 transmits high-temperature steam into the supergravity desorber 3, so that the high-temperature steam contacts the solution, thereby increasing the temperature of the solution. The solution that has completed the release of carbon dioxide enters the reboiler 4, so that the temperature is further increased, thereby releasing the carbon dioxide that may not have been released, and the carbon dioxide follows the high-temperature steam to re-enter the supergravity desorber 3.
[0032] The machine also includes a blower 10 , which inputs the exhaust gas into the supergravity absorption machine 1 through the gas inlet 11 .
[0033] Principle: The change of hypergravity (hypergravity factor, rotation speed) level has a very obvious effect on the removal rate. With the increase of the rotation speed of the hypergravity equipment, the removal rate can increase significantly and then gradually tend to be flat. This is because when the hypergravity level is low, as the hypergravity level increases, the centrifugal force generated by the rotor in the hypergravity equipment increases. The increased centrifugal force cuts the solution into smaller droplets or thinner liquid films, which promotes the absorption efficiency of CO2 by alcohol amine solutions, and then leads to a significant increase in the CO2 removal rate. When the hypergravity level continues to increase, the strengthening effect on the removal rate weakens or even tends to be flat. This is because there is a limit to the cutting effect of centrifugal force on the solution, that is, there is an extreme value for the droplet or liquid film. Even if its value is increased, the change in CO2 removal rate is no longer so obvious. Moreover, a higher hypergravity level means an increase in the motor frequency, which increases the absorption energy consumption. Therefore, considering the CO2 removal rate, economic factors, and operating conditions such as resonance of stable equipment operation, the speed is set at about 700 rpm.
[0034] As the temperature of the solution increases, the CO2 removal rate gradually increases. At higher temperatures, the increasing trend becomes slower. When the temperature is low, increasing the temperature is beneficial to accelerate the movement of molecules, speed up the effective collision between the absorbent and CO2, and promote the reaction in the absorption direction. While increasing the temperature accelerates the forward reaction rate, it also promotes the reverse reaction rate. Moreover, when the temperature increases, the solubility of CO2 in the solution will also decrease. Therefore, when the temperature is low, the promotion of the forward reaction rate by increasing the temperature is dominant, so the CO2 removal rate is significantly increased; however, at higher temperatures, continuing to increase the temperature, the effects of increasing the desorption reaction rate and reducing the solubility become more and more obvious. After the interaction and mutual offset of the two aspects, the increasing trend of the removal rate slows down.
[0035] Since traditional equipment (bubbling kettle or spray tower) operates under the earth's gravity field, there are limitations in mass transfer, especially for the reaction system that controls the mass transfer process. Supergravity equipment has shown excellent performance in enhancing mass transfer. In the supergravity field, the high-speed rotating rotor can generate strong centrifugal force, which greatly enhances the mass transfer and mixing process between gas and liquid phases, thereby improving the mass transfer efficiency by 1-3 orders of magnitude.
[0036] The increase in rotation speed can generate greater centrifugal force in the ultra-gravity device. The solution is sheared into smaller droplets and thinner liquid films in the process of being thrown out from the inner cavity of the ultra-gravity device through a specific rotor structure to the outer wall. This is beneficial to increase the gas-liquid contact area, accelerate the surface renewal rate, and reduce the gas-liquid mass transfer resistance. Therefore, it is significantly enhanced, and the desorption efficiency can be achieved at a lower temperature under the same efficiency and conditions.
[0037] Specific working process: S1. Exhaust gas with carbon dioxide is driven by the blower 10 and enters the machine body 15 through the gas inlet 11 (after being washed and cooled or desulfurized to 40-45°C), and then rises in the machine body 15. At the same time, the solution enters from the liquid inlet 13, and the solution flows downward from the top of the machine body 15. In the machine body 15, the motor 16 drives the rotating rod 17 to drive the blades 19 to rotate;
[0038] S2, the waste gas with carbon dioxide rises from the bottom of the body 15 to the bottom of the body 15 to become the decarbonated waste gas, and passes through the gas outlet 12, enters the first gas-liquid separator 7 from the first connecting port 71, separates the solution carried in the decarbonated waste gas, and flows back to the body 15 from the liquid inlet 13 through the reflux port 72; the solution falls from the top of the body 15 to the bottom of the body 15 and absorbs carbon dioxide, and flows through the rich liquid tank 5, flows into the lean and rich liquid heat exchanger 2 from the rich liquid inlet 21, performs heat exchange in the rich liquid pipe, preliminarily increases the solution temperature, and then flows out from the rich liquid outlet 22 to the supergravity desorber 3; the liquid adding tank 6 replenishes the solution in the rich liquid tank 5;
[0039] S3, the reboiler 4 transmits the heated gas into the supergravity desorber 3 to heat the solution to 100-130°C, and the solution releases carbon dioxide. The carbon dioxide enters the first cooler 8 through the discharge port 33 to cool down, and then enters the second gas-liquid separator 81 to separate the solution contained in the carbon dioxide. The separated solution flows back to the supergravity desorber 3 through the liquid return port 34, and the carbon dioxide is discharged from the carbon dioxide port; after the carbon dioxide is released, the solution in the supergravity desorber 3 enters the reboiler through the liquid outlet 32 to be heated again, and the residual carbon dioxide in the solution is released again. The carbon dioxide and the gas heated by the reboiler 4 are transmitted to the supergravity desorber 3, and the solution enters the lean-rich liquid heat exchanger 2 through the lean liquid inlet 23;
[0040] S4. The solution in the lean-rich liquid heat exchanger 2 exchanges heat with the rich liquid tube in the lean liquid tube, and the solution temperature decreases. Then, the solution enters the second cooler 9 through the lean liquid outlet 24 to be cooled again to 40-45° C., and finally flows into the body 15 from the liquid inlet 13.
Claims
1. A low energy consumption supergravity carbon dioxide absorption device, characterized in that: The invention comprises a supergravity absorber (1), a lean-rich liquid heat exchanger (2), a supergravity desorber (3) and a reboiler (4). The supergravity absorber (1) has a gas inlet (11) for waste gas to enter, a gas outlet (12) for decarbonated waste gas to flow out, a liquid inlet (13) for solution to flow in and a liquid outlet (14) for solution to flow out. The lean-rich liquid heat exchanger (2) has a rich liquid inlet (21), a rich liquid outlet (22), a lean liquid inlet (23) and a lean liquid outlet (24). A rich liquid pipe is provided between the rich liquid inlet (21) and the rich liquid outlet (22) to connect the two. The lean liquid inlet (23) is provided at the bottom of the reboiler. ) and the lean liquid outlet (24) are connected to each other with a lean liquid pipe, the rich liquid pipe and the lean liquid pipe have an exchange portion for performing heat exchange, the liquid outlet (14) and the rich liquid inlet (21) are connected via a pipe, the supergravity desorber (3) has a desorber inlet (31), a desorber outlet (32) and a discharge outlet (33), the rich liquid outlet (22) and the desorber inlet (31) are connected via a pipe, the desorber outlet (32) and the lean liquid inlet (23) are connected via a pipe, the lean liquid outlet (24) and the liquid inlet (13) are connected via a pipe, and the reboiler (4) heats the supergravity desorber (3).
2. The low-energy-consumption ultra-gravity carbon dioxide absorption device according to claim 1, characterized in that: The supergravity absorption machine (1) comprises a machine body (15), a motor (16), a rotating rod (17) and a liquid main pipe (18). The rotating rod (17) is arranged in the machine body (15) to rotate vertically. The motor (16) is arranged in the machine body (15) and drives the rotating rod (17) to rotate. A plurality of blades (19) distributed vertically are arranged on the rotating rod (17). The gas inlet (11) is arranged on the side wall of the machine body (15) and is located below the blades (19). The liquid main pipe (18) is arranged outside the machine body (15) and has a plurality of branch pipes (181) opposite to the blades (19). The branch pipes (181) are arranged obliquely in the machine body (15). The other end of the liquid main pipe (18) opposite to the branch pipes (181) serves as a liquid inlet (13). The gas outlet (12) is arranged at the top of the machine body (15), and the liquid outlet (14) is arranged at the bottom of the machine body (15).
3. The low-energy-consumption ultra-gravity carbon dioxide absorption device according to claim 1, characterized in that: It also includes a rich liquid tank (5) and a liquid adding tank (6); a rich liquid pipe is arranged between the supergravity absorption machine (1) and the lean-rich liquid heat exchanger (2); the liquid adding tank (6) is connected to the rich liquid tank (5) and adds the solution into the rich liquid tank (5).
4. The low-energy-consumption ultra-gravity carbon dioxide absorption device according to claim 1, characterized in that: It comprises a first gas-liquid separator (7), wherein the side of the first gas-liquid separator (7) has a first connection port (71) connected to the gas outlet (12), and the bottom of the first gas-liquid separator (7) has a reflux port (72) connected to the liquid inlet (13).
5. The low-energy-consumption ultra-gravity carbon dioxide absorption device according to claim 1, characterized in that: It also comprises a first cooler (8) and a second gas-liquid separator (81), the supergravity desorption machine (3) having a liquid return port (34), the liquid return port (34) being connected to the bottom end of the second gas-liquid separator (81), the discharge port (33) being connected to the top end of the second gas-liquid separator (81), and the first cooler (8) being arranged between the two and used for cooling, and the second gas-liquid separator (81) is also provided with a carbon dioxide gas port (82) for discharging carbon dioxide.
6. The low energy consumption ultra-gravity carbon dioxide absorption device according to claim 1, characterized in that: A second cooler (9) for cooling the solution is provided between the lean liquid outlet (24) and the liquid inlet (13).
7. The low energy consumption ultra-gravity carbon dioxide absorption device according to claim 1, characterized in that: The reboiler (4) is arranged between the supergravity desorber (3) and the lean-rich liquid heat exchanger (2); the desorbent outlet (32) and the lean liquid inlet (23) are connected via the reboiler (4); and a heating pipe (41) for supplying heat is arranged on the reboiler (4).
8. The low energy consumption ultra-gravity carbon dioxide absorption device according to claim 1, characterized in that: It also includes a blower (10), which inputs the exhaust gas into the supergravity absorption machine (1) through the gas inlet (11).