Straightfall desorber

Abstract

The application discloses a vertical waterfall type desorption tower. The vertical waterfall type desorption tower comprises a tower body, a liquid inlet device, a liquid distribution device, a gas distributor and a liquid outlet device, a filler layer is arranged in the tower body, the liquid inlet device is arranged at the top of the tower body and is used for leading absorbent for absorbing carbon dioxide into the tower body, the liquid distribution device is arranged above the filler layer and below the liquid inlet device, the absorbent vertically falls to the filler layer in a vertical waterfall type through the liquid distribution device, the gas distributor is arranged at the bottom of the tower body and is used for distributing heated gas in the tower body, and the liquid outlet device is arranged at the bottom of the tower body and is used for discharging the absorbent after being regenerated by heating out of the tower body. The vertical waterfall type design of the liquid distribution device of the application makes the absorbent vertically fall in a waterfall type, increases the gas-liquid contact area and contact time, and thus improves the desorption efficiency of carbon dioxide. The absorbent is made to naturally fall by gravity, the dependence on external power is reduced, and the energy consumption is lowered.

Description

Technical Field

[0001] This invention relates to the field of carbon capture technology, and more particularly to a vertical waterfall desorption tower. Background Technology

[0002] With the intensification of global climate change and increasingly stringent requirements for greenhouse gas emission control, carbon capture technology has received widespread attention as one of the important means to address climate change. Carbon capture technology effectively reduces the concentration of greenhouse gases in the atmosphere by capturing and storing carbon dioxide, thereby mitigating the impacts of climate change.

[0003] Among numerous carbon capture methods, chemical absorption is widely used due to its high capture efficiency and mature technology. Chemical absorption captures carbon dioxide by using a specific absorbent (such as an amine solution) to react chemically with the carbon dioxide. However, the absorbent needs to be desorbed and regenerated after absorbing carbon dioxide for recycling. In current desorption tower designs, the absorbent is brought into contact with the heated gas through spraying or packed towers to promote carbon dioxide desorption.

[0004] Although chemical absorption methods demonstrate excellent performance in carbon capture, the design of desorption towers for related technologies still faces several challenges. First, the structure and operation of desorption towers often result in insufficient gas-liquid contact area and short contact time, thus reducing desorption efficiency. Second, reliance on external power sources (such as pumps and fans) to maintain gas-liquid flow increases energy consumption. Furthermore, the recycling efficiency of the absorbent needs improvement, limiting the widespread application and efficiency enhancement of carbon capture technology. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, embodiments of the present invention propose a direct-flow desorption tower to help improve the desorption efficiency of carbon dioxide.

[0007] The vertical waterfall desorption tower of this invention includes a tower body, a liquid inlet device, a liquid distribution device, a gas distributor, and a liquid outlet device. The tower body is provided with a packing layer. The liquid inlet device is located at the top of the tower body and is used to introduce the absorbent for absorbing carbon dioxide into the tower body. The liquid distribution device is located above the packing layer and below the liquid inlet device, allowing the absorbent to fall vertically into the packing layer in a vertical waterfall manner. The gas distributor is located at the bottom of the tower body and is used to distribute heated gas within the tower body. The liquid outlet device is located at the bottom of the tower body and is used to discharge the heated and regenerated absorbent from the tower body.

[0008] In some embodiments, the liquid inlet device includes a liquid inlet pipe, a liquid inlet pump, and a spray element. The liquid inlet pipe is connected to the tower body, the liquid inlet pump is disposed on the liquid inlet pipe, and the spray element is disposed inside the tower body and located above the liquid distribution device. The spray element is connected to the liquid inlet pipe.

[0009] In some embodiments, the liquid distribution device employs an inclined plate or stepped structure, allowing the absorbent to fall vertically in a waterfall-like manner.

[0010] In some embodiments, there are multiple packing layers, which are spaced apart along the height direction of the tower body, and each packing layer is provided with a liquid distribution device above it.

[0011] In some embodiments, a first cavity is provided between the packing layer and the inner wall of the tower body, and the first cavities of multiple packing layers are staggered in the height direction of the tower body. A second cavity is provided between the liquid distribution device between two adjacent packing layers and the inner wall of the tower body, and the second cavities of multiple liquid distribution devices are staggered in the height direction of the tower body. The first cavity and the second cavity are sequentially connected along the height direction of the tower body to form a spiral flow channel. The upper end of the flow channel is connected to a heat source, and the lower end of the flow channel is connected to the gas distributor.

[0012] In some embodiments, the gas distributor employs a perforated plate or nozzle structure.

[0013] In some embodiments, the bottom of the tower body is provided with a liquid receiving plate, which is located below the gas distributor. The liquid receiving plate is provided with an overflow cap, which is located at the center of the liquid receiving plate. The absorbent after heating and regeneration on the liquid receiving plate falls to the bottom of the tower through the overflow cap.

[0014] In some embodiments, the liquid outlet device includes a liquid outlet pipe and a liquid outlet pump, the liquid outlet pipe being connected to the bottom of the tower body, and the liquid outlet pump being mounted on the liquid outlet pipe.

[0015] In some embodiments, the cascade desorption tower further includes a gas-liquid separator located at the top of the tower body, which is used to separate the desorbed carbon dioxide gas and the regenerated absorbent.

[0016] In some embodiments, the gas-liquid separator is connected to the liquid inlet device to transport the separated absorbent back into the tower body through the liquid inlet device.

[0017] The vertical waterfall desorption tower of this invention features a liquid distribution device with a vertical waterfall design that allows the absorbent to fall vertically in a waterfall-like manner, increasing the gas-liquid contact area and contact time, thereby improving the carbon dioxide desorption efficiency. Utilizing gravity to allow the absorbent to fall naturally reduces dependence on external power and lowers energy consumption. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a vertical waterfall desorption tower according to an embodiment of the present invention.

[0019] Figure label:

[0020] 1-Tower body; 11-Packing layer; 12-Liquid receiving plate; 13-Overflow cap; 101-Flow guide channel; 2-Liquid inlet device; 21-Liquid inlet pipe; 22-Liquid inlet pump; 23-Spraying component; 3-Liquid distribution device; 4-Gas distributor; 5-Liquid outlet device; 51-Liquid outlet pipe; 52-Liquid outlet pump; 6-Gas-liquid separator. Detailed Implementation

[0021] 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.

[0022] The following describes an embodiment of the vertical waterfall desorption tower of the present invention with reference to the accompanying drawings.

[0023] like Figure 1 As shown, the vertical waterfall desorption tower of this invention includes a tower body 1, a liquid inlet device 2, a liquid distribution device 3, a gas distributor 4, and a liquid outlet device 5.

[0024] The tower body 1 is the main structure of the entire desorption tower, and is usually designed as a cylinder or rectangle to provide a stable internal environment. The tower body 1 is equipped with a packing layer 11, which can be structured packing or loose packing, for contact between the absorbent and the heating gas.

[0025] The liquid inlet device 2 is located at the top of the tower body 1. The liquid inlet device 2 can be connected to the absorption tower in the carbon capture system, so that the absorbent discharged from the absorption tower to absorb carbon dioxide can be introduced into the tower body 1 through the liquid inlet device 2, ensuring that the absorbent can smoothly enter the subsequent treatment process.

[0026] The liquid distribution device 3 is located above the packing layer 11 and below the liquid inlet device 2. The liquid distribution device 3 adopts a vertical waterfall design, so that the absorbent falls vertically to the packing layer 11 in a vertical waterfall manner after passing through the liquid distribution device 3. The vertical waterfall design increases the falling path and contact area of ​​the absorbent, thereby improving the efficiency of gas-liquid contact.

[0027] Gas distributor 4 is located at the bottom of tower body 1. Heated gas (provided by an external heat source, such as power plant steam) is transported to gas distributor 4 through a pipeline. Gas distributor 4 is used to evenly distribute the heated gas in tower body 1, ensuring that the gas can flow upward evenly and fully contact the falling absorbent to promote the desorption of carbon dioxide.

[0028] The liquid outlet device 5 is located at the bottom of the tower body 1. The liquid outlet device 5 is used to discharge the heated and regenerated absorbent from the tower body 1. After subsequent treatment (e.g., evaporation and concentration), it can be transported back to the absorption tower in the carbon capture system for recycling through pipelines.

[0029] Therefore, in the operation of the vertical waterfall desorption tower of this embodiment of the invention, a heat source is connected, and heated gas is introduced into the bottom of the tower body 1 through the gas distributor 4. The absorbent that has absorbed carbon dioxide is transported to the liquid distribution device 3 through the liquid inlet device 2, so that it is evenly distributed on the packing layer 11. Under the action of gravity, the absorbent flows vertically along the surface of the packing, making full contact with the upward flowing heated gas. Carbon dioxide is desorbed from the absorbent, and the regenerated absorbent is discharged from the tower body 1 through the liquid outlet device 5.

[0030] In this embodiment of the invention, the vertical waterfall desorption tower utilizes a liquid distribution device 3 with a vertical waterfall design, allowing the absorbent to fall vertically in a waterfall-like manner. This increases the gas-liquid contact area and contact time, thereby improving the carbon dioxide desorption efficiency. Utilizing gravity to allow the absorbent to fall naturally reduces dependence on external power and lowers energy consumption.

[0031] In some embodiments, such as Figure 1 As shown, the liquid inlet device 2 includes a liquid inlet pipe 21, a liquid inlet pump 22, and a spray element 23.

[0032] The liquid inlet pipe 21 is connected to the tower body 1. As the connecting channel between the absorption tower and the tower body 1 in the carbon capture system, the liquid inlet pipe 21 is responsible for conveying the absorbent that has absorbed carbon dioxide, so that it can flow smoothly from the absorption tower into the tower body 1 to start the desorption process.

[0033] The feed pump 22 is installed on the feed pipe 21. The feed pump 22 provides the necessary power for the delivery of the absorbent, overcomes pipeline resistance and gravity, and ensures that the absorbent can flow smoothly into the tower body 1. The feed pump 22 can control the delivery amount of absorbent by adjusting its speed or flow rate to meet the needs of different operating conditions and ensure the stability and efficiency of the desorption process.

[0034] The spray element 23 is located inside the tower body 1 and above the liquid distribution device 3, and is connected to the liquid inlet pipe 21. The spray element 23 evenly distributes the absorbent above the liquid distribution device 3, ensuring that the absorbent can cover the entire liquid distribution area and avoid local overload or underload.

[0035] The inlet pipe 21, inlet pump 22, and spray element 23 in the liquid inlet device 2 work together to ensure that the absorbent can smoothly enter the tower body 1 and be evenly distributed above the liquid distribution device 3. This design not only improves the desorption efficiency but also optimizes the operation of the entire system, providing a good foundation for the subsequent desorption process.

[0036] In some embodiments, the liquid distribution device 3 adopts an inclined plate or stepped structure, which allows the absorbent to fall vertically in a waterfall-like manner, increasing the contact area and contact time with the packing layer 11, thereby improving the desorption efficiency of carbon dioxide.

[0037] For example, the liquid distribution device 3 consists of multiple inclined plates, each with a certain inclination angle. This design guides the absorbent to flow along the inclined plates, forming a waterfall-like cascade. Alternatively, the liquid distribution device 3 consists of multiple stepped platforms, with the absorbent flowing from one platform to another, gradually forming a vertically cascading water flow.

[0038] The inclined plate or stepped structure guides the absorbent to be evenly distributed on the packing layer 11, avoiding local overload or underload, and ensuring that the desorption process of the entire packing layer 11 is uniform and efficient. The inclined plate or stepped structure controls the flow rate and stability of the absorbent, ensuring that the absorbent can flow smoothly and avoiding accumulation or poor flow.

[0039] Furthermore, the liquid distribution device 3 is made of corrosion-resistant and high-temperature-resistant materials to adapt to the high-temperature and corrosive environment during the desorption process.

[0040] In some embodiments, such as Figure 1 As shown, there are multiple packing layers 11, which are arranged at intervals along the height direction of the tower body 1, and a liquid distribution device 3 is provided above each packing layer 11.

[0041] By setting multiple packing layers 11, each packing layer 11 can provide additional contact surface, increasing the gas-liquid contact area. The arrangement of multiple packing layers 11 can extend the flow path of the absorbent within the tower body 1, increasing its residence time. The longer residence time allows the absorbent more time to contact the gas, releasing more carbon dioxide, thereby improving desorption efficiency.

[0042] Each packing layer 11 is equipped with a liquid distribution device 3 to ensure that the absorbent is evenly distributed on each packing layer 11. The evenly distributed absorbent can avoid overload or underload in certain areas, thereby improving the desorption efficiency and stability of the entire tower 1.

[0043] In some embodiments, such as Figure 1As shown, a first cavity is provided between the packing layer 11 and the inner wall of the tower body 1, and the first cavities of multiple packing layers 11 are staggered in the height direction of the tower body 1. A second cavity is provided between the liquid distribution device 3 between two adjacent packing layers 11 and the inner wall of the tower body 1, and the second cavities of multiple liquid distribution devices 3 are staggered in the height direction of the tower body 1. The first cavity and the second cavity are connected sequentially along the height direction of the tower body 1 to form a spiral flow channel 101. The upper end of the flow channel 101 is connected to a heat source, and the lower end of the flow channel 101 is connected to a gas distributor 4.

[0044] Heating gas enters from the upper end of the guide channel 101, spirals downward around the packing layer 11 inside the tower body 1, and serves to preheat and insulate the tower body 1. Then it flows to the gas distributor 4 at the bottom of the tower body 1, which distributes the heating gas evenly inside the tower body 1.

[0045] As the heated gas spirals downward within the guide channel 101, it gradually releases heat, preheating the tower body 1 and its internal structure. This helps to increase the temperature of the packing layer 11, promoting the desorption of carbon dioxide. The spiral flow path ensures that the heated gas is evenly distributed throughout the tower body 1, avoiding localized overheating or uneven temperature distribution, and improving desorption efficiency.

[0046] The heating gas within the flow channel 101 provides an insulation layer for the tower body 1, reducing heat loss to the outside and maintaining a stable internal temperature, thus further improving desorption efficiency. The staggered arrangement of the cavities extends the flow path of the heating gas, increases the time and area of ​​heat transfer, improves heat utilization, and reduces energy waste.

[0047] The spiral flow path reduces gas flow resistance, ensuring that the heating gas flows smoothly and is evenly distributed throughout the tower body 1. The smooth flow path reduces airflow impact and vibration, improving the system's operational stability.

[0048] By optimizing heat distribution and reducing heat loss, the system's energy consumption is lowered, improving its economic efficiency. The efficient desorption process and stable system operation reduce maintenance and operating costs, further enhancing the system's economic viability.

[0049] Specifically, such as Figure 1 As shown, there is no second cavity between the liquid distribution device 3 located at the top of the tower body 1 and the inner wall of the tower body 1. The packing layer 11 and the liquid distribution device 3 below the top liquid distribution device 3 are sequentially provided with a first cavity and a second cavity, which are connected to each other, up to the gas distributor 4.

[0050] It should be noted that since the spray element 23 is located directly above the uppermost liquid distribution device 3, if the uppermost liquid distribution device 3 also has a second cavity, the heated gas will flow upwards as soon as it enters the guide channel 101. This would improve the stability and reliability of the system operation.

[0051] In some embodiments, the gas distributor 4 employs a perforated plate or nozzle structure.

[0052] Among them, perforated plates are a common gas distribution method, typically consisting of one or more plates with uniformly distributed small holes. The size, shape, and distribution density of the holes can be adjusted according to specific needs to optimize gas flow and distribution.

[0053] The perforated plate evenly distributes the heated gas to various areas of the tower body 1 through small holes, ensuring that the gas can fully contact the absorbent and improve desorption efficiency. The perforated plate design can reduce airflow impact and turbulence, maintain airflow stability, and avoid interfering with the flow of absorbent.

[0054] A nozzle is a more precise method of gas distribution. By controlling the shape and size of the nozzle, the flow rate and distribution of the gas can be precisely controlled. Nozzles can be designed with single or multiple orifices, and the materials used are typically high-temperature resistant and corrosion-resistant metals or ceramics.

[0055] The nozzle structure allows for more precise control of gas flow velocity and distribution, ensuring uniform gas distribution within the tower body 1 and improving desorption efficiency. The nozzle design reduces gas flow turbulence and fluctuations, maintaining gas flow stability and preventing uneven effects on absorbent flow. The nozzle structure also more effectively promotes gas-absorbent contact, increasing the gas-liquid contact area and time, further enhancing carbon dioxide desorption efficiency.

[0056] In some embodiments, such as Figure 1 As shown, a liquid receiving plate 12 is provided at the bottom of the tower body 1, and the liquid receiving plate 12 is located below the gas distributor 4. The liquid receiving plate 12 is provided with an overflow cap 13, which is located at the center of the liquid receiving plate 12. The absorbent after heating and regeneration on the liquid receiving plate 12 falls to the bottom of the tower through the overflow cap 13.

[0057] After flowing through the packing layer 11, the absorbent falls at a high speed, directly impacting the bottom of the tower body 1. This can cause the absorbent to splash or distribute unevenly, and it is also detrimental to the discharge of the absorbent from the liquid outlet device 5. The liquid receiving plate 12 can slow down the falling speed of the absorbent, prevent direct impact, and keep the bottom of the tower body 1 clean and stable.

[0058] When the absorbent collected by the receiving plate 12 reaches the overflow height, it falls to the bottom of the tower through the overflow cap 13 located at the center of the receiving plate 12. The overflow cap 13 is used to guide the absorbent from the center of the tower body 1 to the bottom of the tower so that the absorbent can be discharged through the liquid outlet device 5 in the future.

[0059] In some embodiments, such as Figure 1 As shown, the liquid outlet device 5 includes a liquid outlet pipe 51 and a liquid outlet pump 52. The liquid outlet pipe 51 is connected to the center of the bottom of the tower body 1 to facilitate the collection and flow of absorbent into the liquid outlet pipe 51. The liquid outlet pump 52 is installed on the liquid outlet pipe 51 to provide the necessary power for the flow of absorbent.

[0060] In some embodiments, such as Figure 1 As shown, the vertical waterfall desorption tower also includes a gas-liquid separator 6, which is located at the top of the tower body 1. The gas-liquid separator 6 is used to separate the desorbed carbon dioxide gas and the regenerated absorbent.

[0061] It is understandable that the carbon dioxide desorbed by heating will carry some of the absorbent out of tower 1, and the absorbent in the carbon dioxide can be separated by setting up a gas-liquid separator 6.

[0062] The separated carbon dioxide gas needs to be discharged from tower 1 through pipelines and enter subsequent processing or storage systems. Gas-liquid separator 6 can prevent liquid from causing corrosion or damage to pipelines and downstream equipment, thus extending the service life of the equipment.

[0063] Furthermore, such as Figure 1 As shown, the gas-liquid separator 6 is connected to the liquid inlet device 2 so that the separated absorbent can be transported back into the tower body 1 through the liquid inlet device 2, thereby avoiding waste of absorbent and improving the utilization rate of absorbent.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature 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 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 that the first feature is at a lower horizontal level than the second feature.

[0068] 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.

[0069] Although embodiments of the present invention have been shown and described above, 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. A direct-flow desorption tower, characterized in that, include: The tower body, wherein a packing layer is provided inside the tower body; A liquid inlet device is provided at the top of the tower body, and the liquid inlet device is used to introduce the absorbent for absorbing carbon dioxide into the tower body; A liquid distribution device is provided above the packing layer and below the liquid inlet device, through which the absorbent falls vertically into the packing layer in a waterfall-like manner. A gas distributor is located at the bottom of the tower body and is used to distribute heating gas within the tower body. A liquid discharge device is provided at the bottom of the tower body, and the liquid discharge device is used to discharge the heated and regenerated absorbent from the tower body.

2. The direct-flow desorption tower according to claim 1, characterized in that, The liquid inlet device includes an inlet pipe, an inlet pump, and a spray element. The inlet pipe is connected to the tower body, the inlet pump is located on the inlet pipe, and the spray element is located inside the tower body and above the liquid distribution device. The spray element is connected to the inlet pipe.

3. The direct-flow desorption tower according to claim 1, characterized in that, The liquid distribution device adopts an inclined plate or stepped structure, so that the absorbent falls vertically in a waterfall-like manner.

4. The direct-flow desorption tower according to claim 1, characterized in that, The packing layer has multiple layers, which are arranged at intervals along the height direction of the tower body, and each packing layer is provided with a liquid distribution device above it.

5. The direct-flow desorption tower according to claim 4, characterized in that, A first cavity is provided between the packing layer and the inner wall of the tower body. The first cavities of multiple packing layers are staggered in the height direction of the tower body. A second cavity is provided between the liquid distribution device between two adjacent packing layers and the inner wall of the tower body. The second cavities of multiple liquid distribution devices are staggered in the height direction of the tower body. The first cavity and the second cavity are connected sequentially along the height direction of the tower body to form a spiral flow channel. The upper end of the flow channel is connected to a heat source, and the lower end of the flow channel is connected to the gas distributor.

6. The direct-flow desorption tower according to claim 1, characterized in that, The gas distributor adopts a perforated plate or nozzle structure.

7. The direct-flow desorption tower according to claim 1, characterized in that, The bottom of the tower body is provided with a liquid receiving plate, which is located below the gas distributor. The liquid receiving plate is provided with an overflow cap, which is located at the center of the liquid receiving plate. The absorbent after heating and regeneration on the liquid receiving plate falls to the bottom of the tower through the overflow cap.

8. The direct-flow desorption tower according to claim 1, characterized in that, The liquid outlet device includes a liquid outlet pipe and a liquid outlet pump. The liquid outlet pipe is connected to the bottom of the tower body, and the liquid outlet pump is installed on the liquid outlet pipe.

9. The direct-flow desorption tower according to claim 1, characterized in that, It also includes a gas-liquid separator, which is located at the top of the tower body and is used to separate the desorbed carbon dioxide gas and the regenerated absorbent.

10. The direct-flow desorption tower according to claim 9, characterized in that, The gas-liquid separator is connected to the liquid inlet device to transport the separated absorbent back into the tower body through the liquid inlet device.

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