Absorption tower and carbon capture system

Abstract

The present application relates to the technical field of carbon capture, and particularly relates to an absorption tower and a carbon capture system, the absorption tower comprising an absorption tower body, a defoaming assembly and a backwashing assembly, the defoaming assembly comprising at least two defoamers, the defoamers being fitted in the absorption tower body, the at least two defoamers being arranged in sequence in a first direction, the backwashing assembly comprising a plurality of washing nozzles, the plurality of washing nozzles being arranged at intervals in a second direction, the washing nozzles being arranged at intervals with the defoamers in the extension direction of the absorption tower body, the washing nozzles being located downstream of the defoamers in the flow direction of flue gas, the washing nozzles being adapted to communicate with a washing source, the washing nozzles being movable relative to the defoamers in the first direction to backwash part of the defoamers, and the second direction being orthogonal to the first direction and the extension direction of the absorption tower body, the absorption tower of the present application can ensure the defoaming effect of the defoamers when the defoamers are backwashed.

Description

Technical Field

[0001] This invention relates to the field of carbon capture technology, specifically to an absorption tower and a carbon capture system. Background Technology

[0002] In a carbon dioxide capture system, the absorbent circulates between the absorption tower and the regeneration tower to capture and desorb carbon dioxide from the flue gas. The absorption tower captures carbon dioxide from the flue gas, and the absorbent carried in the discharged flue gas is removed by a demister at the top of the absorption tower. However, the demister may become clogged after long-term operation. Related technologies often solve this by installing a backwashing device above the demister. However, backwashing uses high-pressure water to flush the demister in the opposite direction, which reduces the demister's demisting effect during the backwashing process. Summary of the Invention

[0003] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention propose an absorption tower that ensures the demisting effect of the demister during backwashing.

[0004] This invention also proposes a carbon capture system.

[0005] An absorption tower according to an embodiment of the present invention includes: an absorption tower body; a demister assembly, the demister assembly including at least two demisters, the demisters being fitted into the absorption tower body, the at least two demisters being arranged sequentially in a first direction; and a backwashing assembly including a plurality of backwash nozzles, the plurality of backwash nozzles being spaced apart in a second direction, the backwash nozzles being spaced apart from the demisters in the extending direction of the absorption tower body, the backwash nozzles being located downstream of the demisters in the flue gas flow direction, the backwash nozzles being adapted to communicate with a backwashing source, the backwash nozzles being movable relative to the demisters in the first direction to backwash a portion of the demisters, and the second direction being orthogonal to the first direction and the extending direction of the absorption tower body.

[0006] This invention provides an embodiment of the invention by arranging multiple demisters sequentially in the left-right direction within the absorption tower body, and by installing a flushing nozzle that can move in the left-right direction above the demisters. By moving the flushing nozzle in the left-right direction, multiple demisters are backwashed individually, so that some demisters are in the flushing state while others are in the demisting state, thus achieving backwashing of the demisters while ensuring their demisting effect.

[0007] In some embodiments, the plurality of flushing nozzles are divided into multiple groups of flushing nozzles arranged at intervals in the second direction, and each group of flushing nozzles includes at least two flushing nozzles arranged at intervals in the first direction.

[0008] This invention provides an embodiment of the invention that provides multiple sets of flushing nozzles in the front-to-back direction. Each set of flushing nozzles includes at least two nozzles. The left-to-right movement of these nozzles enables reverse flushing of the demister, achieving a propulsive backwashing of the demister from one side to the other. This improves the backwashing effect of the demister. Furthermore, the multiple flushing nozzles enhance the backwashing efficiency of the backwashing assembly on the demister.

[0009] In some embodiments, the backwashing assembly further includes a plurality of support rails, which are spaced apart in the second direction. Each support rail corresponds to a set of flushing nozzles. The support rails extend along the first direction, and both ends of the support rails are respectively connected to the inner wall surface of the absorption tower body. The flushing nozzles are slidably connected to the support rails.

[0010] The present invention, through the provision of a support rail, facilitates the installation of the flushing nozzle within the absorption tower body, and the support rail also allows the flushing nozzle to move along the extension direction of the support rail, thereby improving the stability of the flushing nozzle.

[0011] In some embodiments, the backwash assembly further includes a connector disposed between two adjacent backwash nozzles in each set of backwash nozzles.

[0012] In this embodiment of the invention, the connection between two adjacent flushing nozzles in the left-right direction is achieved by setting a connector, thereby enabling the synchronous movement of multiple flushing nozzles in each group of flushing nozzles in the left-right direction.

[0013] In some embodiments, the backwashing assembly further includes a plurality of driving members, which are arranged one-to-one with a plurality of support rails. The driving members are disposed on the support rails and connected to the flushing nozzles. The driving members are used to drive the flushing nozzles to move on the support rails.

[0014] In this embodiment, multiple driving components drive multiple sets of flushing nozzles to achieve reverse flushing of various positions of the demister. When it is necessary to backwash a specific position of the demister, only some sets of flushing nozzles need to be driven to move and flush, which improves the efficiency and convenience of flushing.

[0015] In some embodiments, the absorption tower further includes a spray assembly, the spray assembly including spray heads disposed within the absorption tower body, the spray heads and the demister being arranged at intervals in the extending direction of the absorption tower body, the spray heads being located upstream of the demister in the flue gas flow direction.

[0016] In this embodiment of the invention, a spray head sprays a cooling liquid onto the flue gas, allowing the spray liquid to come into contact with the flue gas, thereby reducing the temperature of the flue gas and thus reducing the saturation of the flue gas, thereby reducing the amount of absorbent carried in the flue gas.

[0017] In some embodiments, the spray assembly further includes a spray pipe, one end of which is connected to the spray head, and the other end of which is adapted to be connected to a cold source.

[0018] In some embodiments, the spray assembly further includes a liquid collection tray, which is arranged at a distance from the spray head in the extending direction of the absorption tower body. The liquid collection tray is provided with a gas lifting cap and is used to collect the cold liquid sprayed by the spray head.

[0019] The collection tray in this embodiment can collect the spray water. Since the temperature of the liquid sprayed by the spray head is low, although the spray liquid exchanges heat with the flue gas, the temperature of the spray liquid after the heat exchange is still low. In this embodiment, the collection tray is set to collect the spray liquid to avoid the spray liquid affecting the absorption section below.

[0020] Furthermore, the collection tray in this embodiment can also collect the water flow from the flushing nozzles that backwash the demister. The water after backwashing the demister contains a lot of impurities. By collecting the flushing water through the collection tray, the impact on the absorption section of the absorption tower body can be reduced.

[0021] In some embodiments, the spray assembly further includes a packing layer disposed between the spray head and the collection tray.

[0022] In this embodiment, the packing layer allows for full contact between the spray liquid and the flue gas, improving heat exchange efficiency. Furthermore, the packing layer can intercept the absorbent carried in the flue gas, reducing its content and achieving pre-separation of the absorbent, thereby reducing the demisting load on the demister.

[0023] The carbon capture system of this invention includes the absorption tower described in the above embodiments.

[0024] The carbon capture system of this invention sets up multiple demisters arranged sequentially in the left-right direction in the absorption tower, and sets up flushing nozzles that can move in the left-right direction above the demisters. By moving the flushing nozzles in the left-right direction, multiple demisters are backwashed individually, so that some demisters are in the flushing state and others are in the demisting state, so as to ensure the demisting effect of the demisters while backwashing them. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the absorption tower according to an embodiment of the present invention.

[0026] Figure 2 This is a schematic diagram of the backwashing assembly according to an embodiment of the present invention.

[0027] Figure 3 This is a schematic diagram of a backwashing assembly according to another embodiment of the present invention.

[0028] Figure label:

[0029] Absorption tower body 1, flue gas inlet 11, flue gas outlet 12, lean liquid inlet 13, rich liquid outlet 14, demister assembly 2, demister 21, demister section 211, backwash assembly 3, backwash nozzle 31, support rail 32, spray assembly 4, spray nozzle 41, spray pipe 42, liquid collection tray 43, gas lifting cap 431, packing layer 44, cold source 5. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] The absorption tower of this invention includes an absorption tower body 1, a demister assembly 2, and a backwashing assembly 3. The demister assembly 2 includes at least two demisters 21, which are fitted inside the absorption tower body 1. The at least two demisters 21 are positioned in a first direction (e.g.,...). Figure 2 The backwash assembly 3 is arranged sequentially in the left-right direction (as shown). The backwash assembly 3 includes multiple flushing nozzles 31, which are arranged in the second direction (e.g., in the left-right direction). Figure 2 The flushing nozzles 31 and demisters 21 are arranged at intervals along the front-to-back direction (as shown), with the flushing nozzles 31 and demisters 21 extending along the extension direction of the absorption tower body 1 (as shown). Figure 1 The flushing nozzles 31 are arranged at intervals in the vertical direction shown. The flushing nozzles 31 are located downstream of the demister 21 in the flue gas flow direction. The flushing nozzles 31 are adapted to communicate with the flushing source. The flushing nozzles 31 are movable relative to the demister 21 in the first direction to backwash part of the demister 21. The second direction is orthogonal to the first direction and the extension direction of the absorption tower body 1.

[0032] Specifically, such as Figure 1 and Figure 2As shown, demisters 21 are installed at the top of the absorption tower body 1. For ease of description, two demisters 21 are used as an example. The left end of the demister 21 on the left is connected to the inner wall of the absorption tower body 1, and the right end of the demister 21 on the left is connected to the left end of the demister 21 on the right. The right end of the demister 21 on the right is connected to the inner wall of the absorption tower body 1. The demister 21 on the left separates the absorbent carried in the flue gas flowing upward from the left, and the demister 21 on the right separates the absorbent carried in the flue gas flowing upward from the right. A flushing nozzle 31 is installed above the demisters 21. Multiple flushing nozzles 31 are arranged at intervals in the front-to-back direction to flush the front and rear sides of the demisters 21 respectively. As the multiple flushing nozzles 31 move from left to right, flushing is achieved from left to right on the demisters 21.

[0033] like Figure 2 As shown, multiple flushing nozzles 31 are arranged in multiple rows at intervals in the front-to-back direction. The number of multiple rows of flushing nozzles 31 is the same as the number of multiple flushing nozzles 31. That is, there is only one flushing nozzle 31 in each row of flushing nozzles 31, which avoids the influence of high-pressure water flow between multiple flushing nozzles 31 in each row and improves the flushing effect of the flushing nozzles 31.

[0034] The demister 21 has a demister state and a flushing state. In the demister state, the flue gas flows from bottom to top, and the demister section 211 of the demister 21 intercepts and separates the absorbent carried in the flue gas. In the flushing state, the flushing nozzle 31 is opened, and the flushing nozzle 31 sprays high-pressure water to backwash the demister 21. Under the impact of the high-pressure water flow, the flue gas located below the demister 21 is pushed towards the adjacent demister 21 that is in the demister state.

[0035] For example, there are four demisters 21 connected in sequence in the left and right directions. The four demisters 21 are arranged in sequence. In this embodiment, the specific number of demisters 21 is not limited. The number of demisters 21 can be determined according to the inner diameter of the absorption tower body 1 in the specific implementation.

[0036] For example, in this embodiment of the invention, the pressure drop of the demister 21, that is, the pressure loss when flue gas flows through the demister 21, is detected. When the pressure drop increases to a preset pressure drop, the demister 21 is backwashed. Alternatively, in this embodiment of the invention, a detector is used to detect the absorbent content in the flue gas discharged from the absorption tower. When the absorbent content in the flue gas discharged from the absorption tower is detected to be higher than a preset content, it is determined that the demister 21 needs to be backwashed, and the backwashing assembly 3 is opened to backwash the demister 21. The preset content and preset pressure drop are pre-set values, and are not specifically limited in this embodiment. They are determined with reference to the performance parameters of the demister 21 in actual implementation. Alternatively, in this embodiment of the invention, the demister 21 can also be backwashed periodically, or the need for backwashing of the demister 21 can be determined by the flue gas flow rate.

[0037] For example, if the flushing source is lean solution or water, the backwashing pressure is 0.1 MPa-0.2 MPa. When the demister is severely clogged, the flushing pressure is 0.2 MPa, and when the demister is not severely clogged, the flushing pressure is 0.1 MPa. This embodiment does not limit the specific value of the flushing pressure, and the actual implementation shall prevail.

[0038] Compared to the related technologies that use a backwashing device above the demister 21 to rinse the entire demister 21, this embodiment of the invention arranges multiple demisters 21 arranged sequentially in the left-right direction within the absorption tower body 1, and provides a rinsing nozzle 31 that can move in the left-right direction above the demisters 21. By moving the rinsing nozzle 31 in the left-right direction, multiple demisters 21 are backwashed individually, so that some demisters 21 are in the rinsing state while others are in the demisting state, thus achieving backwashing of the demisters 21 while ensuring the demisting effect of the demisters 21.

[0039] Furthermore, by arranging multiple flushing nozzles 31 at intervals in the front-to-back direction, the backwashing water pressure and flushing time can be adjusted according to the different positions of different demisters 21, thereby improving the backwashing effect of the backwashing assembly 3 on the demister 21 and thus improving the demister 21's demisting effect.

[0040] Furthermore, by arranging multiple demisters 21 sequentially in the left-right direction, when a demister 21 needs to be replaced, it can be replaced by replacing a single demister 21, thereby reducing maintenance and replacement costs.

[0041] In some embodiments, the plurality of flushing nozzles 31 are divided into multiple groups of flushing nozzles 31 arranged at intervals in a second direction, and each group of flushing nozzles 31 includes at least two flushing nozzles 31 arranged at intervals in a first direction.

[0042] Specifically, such as Figure 3 As shown, the multiple flushing nozzles 31 are divided into multiple groups of flushing nozzles 31 in the front-back direction. Each group of flushing nozzles 31 includes two flushing nozzles 31 arranged at intervals in the left-right direction. In this embodiment, eight groups of flushing nozzles 31 are set in the front-back direction. Each group of flushing nozzles 31 includes two flushing nozzles 31, and the two flushing nozzles 31 are arranged at intervals in the left-right direction.

[0043] For example, the flushing angle between the flushing nozzle 31 and the demister 21 is set to 90°-120°. In this embodiment, when the flushing angle is 90°, the flushing nozzle 31 is directly facing the demister 21, which can improve the flushing effect.

[0044] In this embodiment of the invention, multiple sets of flushing nozzles 31 are arranged in the front-back direction. Each set of flushing nozzles 31 includes at least two flushing nozzles 31. The demister 21 is flushed in reverse by moving the multiple sets of flushing nozzles 31 left and right. This achieves a push-type backwashing of the demister 21 from one side to the other, improving the backwashing effect of the demister 21. Moreover, the arrangement of multiple flushing nozzles 31 improves the backwashing efficiency of the backwashing assembly 3 on the demister 21.

[0045] Furthermore, in this embodiment of the invention, by moving each set of flushing nozzles 31 in the left and right directions, partial cleaning of the demister 21 corresponding to the set of flushing nozzles 31 is achieved. Since the flue gas flows from bottom to top, while the high-pressure water flow of the backwash flows from top to bottom, this embodiment further reduces the impact of the high-pressure water flow on the flue gas by backwashing a portion of one of the multiple demisters 21, thus ensuring the normal demisting of the demister 21 while achieving backwashing of the demister 21.

[0046] In some embodiments, the backwashing assembly 3 further includes a plurality of support rails 32, which are spaced apart in a second direction. Each support rail 32 corresponds to a set of flushing nozzles 31. The support rails 32 extend along a first direction, and both ends of the support rails 32 are connected to the inner wall surface of the absorption tower body 1. The flushing nozzles 31 are slidably connected to the support rails 32.

[0047] Specifically, such as Figure 2 and Figure 3 As shown, multiple support rails 32 are arranged at intervals in the front-to-back direction. The support rails 32 extend in the left-to-right direction and are connected to the inner wall of the absorption tower body 1 to fix the support rails 32. Each support rail 32 is equipped with a set of flushing nozzles 31. The flushing nozzles 31 in each set of flushing nozzles 31 are movably connected to the support rails 32, so as to realize the movement of the flushing nozzles 31 relative to the support rails 32 in the left-to-right direction.

[0048] For example, on the projection plane parallel to the left-right and front-back directions, the outer contour of the backwash assembly 3 is circular or rectangular to adapt to different installation environments.

[0049] In this embodiment of the invention, the support rail 32 facilitates the installation of the flushing nozzle 31 inside the absorption tower body 1, and the support rail 32 allows the flushing nozzle 31 to move along the extension direction of the support rail 32, thereby improving the stability of the flushing nozzle 31.

[0050] In some embodiments, the backwash assembly 3 further includes a connector disposed between two adjacent backwash nozzles 31 in each set of backwash nozzles 31.

[0051] Specifically, the left end of the connector is connected to the left flushing nozzle 31, and the right end of the connector is connected to the right flushing nozzle 31. By setting the connector, the connection between two adjacent flushing nozzles 31 in the left and right directions is realized, thereby realizing the synchronous movement of multiple flushing nozzles 31 in each group of flushing nozzles 31 in the left and right directions.

[0052] For example, in this embodiment, the dimensions of the connector in the left-right direction are not limited. The dimensions of the connector can be set according to the spray range of the flushing nozzle 31 in the left-right direction to reduce the mutual influence of the water flow sprayed by two adjacent flushing nozzles 31.

[0053] In some embodiments, the backwashing assembly 3 further includes a plurality of driving members, which are arranged one-to-one with a plurality of support rails 32. The driving members are disposed on the support rails 32 and connected to the flushing nozzles 31. The driving members are used to drive the flushing nozzles 31 to move on the support rails 32.

[0054] Specifically, the driving component is located at the upper end of the support rail 32, and is located on the left or right side of the support rail 32. The driving end of the driving component is connected to the flushing nozzle 31. The movement of the driving component causes the flushing nozzle 31 to move in the left and right direction on the support rail 32.

[0055] In this embodiment, multiple driving components drive multiple sets of flushing nozzles 31 respectively, thereby achieving reverse flushing of various positions of the demister 21. When it is necessary to backwash a specific position of the demister 21, only some sets of flushing nozzles 31 need to be driven to move and flush, thus improving the efficiency and convenience of flushing.

[0056] For example, the driving component is an electric actuator or a worm gear.

[0057] In some embodiments, the absorption tower further includes a spray assembly 4, which includes a spray head 41 disposed inside the absorption tower body 1. The spray head 41 and the demister 21 are arranged at intervals in the extending direction of the absorption tower body 1, and the spray head 41 is located upstream of the demister 21 in the flue gas flow direction.

[0058] Specifically, such as Figure 1 As shown, the spray head 41 is located below the demister 21 and is connected to the cold source 5. The spray head 41 sprays cold liquid onto the flue gas in the absorption tower body 1, so that the spray liquid comes into contact with the flue gas, reduces the temperature of the flue gas, and thus reduces the saturation of the flue gas, thereby reducing the absorbent carried in the flue gas.

[0059] For example, cold source 5 is cold water or a low-temperature lean solution.

[0060] In some embodiments, the spray assembly 4 further includes a spray pipe 42, one end of which is connected to the spray head 41, and the other end of which is adapted to be connected to the cold source 5.

[0061] Specifically, such as Figure 1 As shown, one end of the spray pipe 42 extends into the absorption tower body 1 and is connected to the spray head 41. The other end of the spray pipe 42 is connected to the cold source 5 to transmit the cold source 5 to the spray head 41, and the spray liquid is sprayed onto the flue gas through the spray head 41.

[0062] For example, the spray solution is industrial water.

[0063] In some embodiments, the spray assembly 4 further includes a liquid collection tray 43, which is arranged at intervals with the spray head 41 in the extending direction of the absorption tower body 1. The liquid collection tray 43 is provided with a gas lifting cap 431 and is used to collect the cold liquid sprayed by the spray head 41.

[0064] Specifically, such as Figure 1 As shown, the liquid collection tray 43 is located below the spray head 41. The liquid collection tray 43 is used to collect the liquid sprayed by the spray head 41. Since the temperature of the liquid sprayed by the spray head 41 is low, although the spray liquid exchanges heat with the flue gas, the temperature of the spray liquid after the heat exchange may still be low. In this embodiment, the spray liquid is collected by setting a collection tray to avoid the spray liquid affecting the absorption section below.

[0065] Furthermore, in this embodiment, the setting of the gas lifting cap 431 ensures that the flue gas can continue to flow upward through the liquid collection plate 43.

[0066] Furthermore, in this embodiment, the liquid collection tray 43 can also collect the water flow from the backwash nozzle 31 to the demister 21. The water after backwashing the demister 21 contains a lot of impurities. By collecting the flushing water through the liquid collection tray 43, the impact on the absorption section of the absorption tower body 1 can be reduced.

[0067] In some embodiments, the spray assembly 4 further includes a packing layer 44 disposed between the spray head 41 and the collection tray 43.

[0068] Specifically, such as Figure 1 As shown, the packing layer 44 is located between the spray head 41 and the collection tray 43. In this embodiment, the packing layer 44 enables the spray liquid to fully contact the flue gas, thereby improving the heat exchange efficiency. In addition, the packing layer 44 can also intercept the absorbent carried in the flue gas, reduce the content of absorbent carried in the flue gas, achieve pre-separation of absorbent, and reduce the demisting load of the demister 21.

[0069] The carbon capture system of this invention includes an absorption tower according to the above embodiments.

[0070] Specifically, such as Figure 1 As shown, the absorption tower body 1 has a flue gas inlet 11, a flue gas outlet 12, a lean liquid inlet 13, and a rich liquid outlet 14. The flue gas inlet 11 is located below the absorption tower body 1, the flue gas outlet 12 is located above the absorption tower body 1 and above the backwashing assembly 3, the lean liquid inlet 13 is located above the absorption tower body 1 and below the collection tray 43, and the rich liquid outlet 14 is located below the absorption tower body 1.

[0071] The carbon capture system of this invention provides a method to backwash multiple demisters 21 arranged sequentially in the left-right direction within an absorption tower, and to install a flushing nozzle 31 that can move in the left-right direction above the demisters 21. By moving the flushing nozzle 31 in the left-right direction, the multiple demisters 21 are backwashed individually, so that some demisters 21 are in the flushing state while others are in the demisting state, thus ensuring the demisting effect of the demisters 21 while backwashing them.

[0072] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0073] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0074] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0075] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0076] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0077] It is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An absorption tower, characterized in that, include: The absorption tower itself; A demisting assembly, comprising at least two demisters, wherein the demisters are fitted into the absorption tower body, and the at least two demisters are arranged sequentially in a first direction. A backwashing assembly includes multiple flushing nozzles, which are spaced apart in a second direction. The flushing nozzles are spaced apart from the demister in the extension direction of the absorption tower body. The flushing nozzles are located downstream of the demister in the flue gas flow direction. The flushing nozzles are adapted to communicate with a flushing source. The flushing nozzles are movable relative to the demister in a first direction to backwash a portion of the demister. The second direction is orthogonal to the first direction and the extension direction of the absorption tower body. The plurality of flushing nozzles are divided into multiple groups of flushing nozzles arranged at intervals in the second direction, and each group of flushing nozzles includes at least two flushing nozzles arranged at intervals in the first direction; The backwashing assembly also includes multiple support rails, which are spaced apart in the second direction. Each support rail corresponds to a set of flushing nozzles. The support rails extend along the first direction, and both ends of the support rails are connected to the inner wall of the absorption tower body. The flushing nozzles are slidably connected to the support rails.

2. The absorption tower according to claim 1, characterized in that, The backwash assembly also includes a connector disposed between two adjacent backwash nozzles in each set of backwash nozzles.

3. The absorption tower according to claim 1, characterized in that, It also includes multiple driving components, which are arranged one-to-one with the multiple support rails. The driving components are mounted on the support rails and connected to the flushing nozzles. The driving components are used to drive the flushing nozzles to move on the support rails.

4. The absorption tower according to any one of claims 1-3, characterized in that, It also includes a spray assembly, which includes spray heads disposed within the absorption tower body. The spray heads and the demister are arranged at intervals along the extension direction of the absorption tower body, and the spray heads are located upstream of the demister in the flue gas flow direction.

5. The absorption tower according to claim 4, characterized in that, The spray assembly also includes a spray pipe, one end of which is connected to the spray head, and the other end of which is adapted to be connected to a cold source.

6. The absorption tower according to claim 5, characterized in that, The spray assembly also includes a liquid collection tray, which is arranged at intervals with the spray head in the extension direction of the absorption tower body. The liquid collection tray is provided with a gas lifting cap and is used to collect the cold liquid sprayed by the spray head.

7. The absorption tower according to claim 6, characterized in that, The spray assembly also includes a packing layer, which is disposed between the spray head and the collection tray.

8. A carbon capture system, characterized in that, Includes the absorption tower according to any one of claims 1-7.

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