Regeneration tower and flue gas treatment device

Abstract

The invention discloses a regeneration tower and a flue gas treatment device, the regeneration tower comprises a tower body and a pressure reducing piece, the tower body is provided with a cavity, an outlet, a plurality of first inlets and a plurality of second inlets, the plurality of first inlets and the plurality of second inlets are communicated with the cavity, the plurality of first inlets and the plurality of second inlets are arranged at intervals along the circumferential direction of the tower body, and the pressure reducing piece is arranged in the cavity. The plurality of first inlets and the plurality of second inlets are arranged at intervals in the vertical direction, the outlet is suitable for being communicated with a reboiler, the pressure reducing part comprises a plurality of channels, the plurality of channels are sequentially arranged in the circumferential direction of the tower body, the channels extend in the vertical direction, the upper ends of the channels are communicated with the adjacent channels, and the lower ends of the channels are communicated with the other adjacent channels; two ends of the channel are respectively communicated with the first inlet and the second inlet, and at least one channel is suitable for being communicated with the reboiler. The regeneration tower has the advantages of simple structure, good regeneration effect, long service life and the like.

Description

Technical Field

[0001] The present invention relates to the field of flue gas treatment, and in particular to a regeneration tower and a flue gas treatment device. Background Art

[0002] The flue gas discharged from coal-fired boilers is generally treated by high-temperature adsorption in an adsorption tower. The high-temperature flue gas with a temperature of about 200°C is passed into the adsorption tower. The pollutants (sulfides and nitrogen oxides) in the high-temperature flue gas are adsorbed and removed by the adsorbent in the adsorption tower. The saturated adsorbent is transported to the regeneration tower for heating and desorption regeneration. The pollutants are desorbed from the adsorbent and recycled, and the adsorbent is regenerated.

[0003] In the related art, the rich liquid is heated in a reboiler and then enters a regeneration tower, which promotes the regeneration of the rich liquid and improves the regeneration effect. The rich liquid heated in the reboiler will form a gas-liquid mixture of gas and liquid, which will have a greater impact on the internal parts after entering the regeneration tower, and the uneven distribution of gas and liquid will affect the regeneration effect. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention provides a regeneration tower with small impact on internal parts and good regeneration effect.

[0006] The embodiment of the present invention provides a flue gas treatment device with simple structure and low cost.

[0007] A regeneration tower according to an embodiment of the present invention comprises: a tower body, the tower body having a chamber, an outlet, a plurality of first inlets and a plurality of second inlets, the plurality of first inlets and the plurality of second inlets are all connected to the chamber, the plurality of first inlets and the plurality of second inlets are all arranged at intervals along the circumference of the tower body, and the plurality of first inlets and the plurality of second inlets are arranged at intervals along the up-down direction, the outlet is suitable for being connected to a reboiler so that the rich liquid in the tower body flows into the reboiler so that the reboiler heats the rich liquid into a gas-liquid mixture; a pressure reducing member, the pressure reducing member comprising a plurality of channels, the plurality of channels are arranged in sequence along the circumference of the tower body, the channels extend in the up-down direction, the upper end of the channels is connected to one of the adjacent channels, the lower end of the channels is connected to another adjacent channel, the two ends of the channels are respectively connected to the first inlet and the second inlet, and at least one of the channels is suitable for being connected to the reboiler so that the gas-liquid mixture flowing out of the reboiler flows into the first inlet and the second inlet through the subsection.

[0008] The regeneration tower of the embodiment of the present invention is provided with a first inlet, a second inlet and a pressure reducing member, so that the gas-liquid mixture can flow in multiple channels, thereby reducing the flow rate of the gas-liquid mixture, preventing the gas-liquid mixture from flowing into the tower body and causing excessive impact on the internal parts, thereby extending the service life of the regeneration tower and improving the distribution effect of the gas-liquid mixture, thereby improving the regeneration effect of the regeneration tower.

[0009] In some embodiments, within the projection plane in the up-down direction, a plurality of the first inlets and a plurality of the second inlets are alternately arranged one by one along the circumference of the tower body.

[0010] In some embodiments, the plurality of channels include a plurality of first channels and a plurality of second channels, and the plurality of first channels and the plurality of second channels are alternately arranged along the circumference of the tower body, the first channel extends from top to bottom and is inclined away from one side of the second channel, the second channel extends from top to bottom and is inclined away from one side of the first channel, the upper end of the first channel is connected to the upper end of one adjacent second channel, the lower end of the first channel is connected to the lower end of another adjacent second channel, the upper end of the first channel is connected to the first inlet, and the lower end of the second channel is connected to the second inlet.

[0011] In some embodiments, the tower body includes an outer tower and an inner tower, the inner tower is arranged in the outer tower and the inner circumferential surface of the outer tower and the outer circumferential surface of the inner tower are spaced apart along the inner and outer directions to form an installation cavity, the pressure reducing member is arranged in the installation cavity and surrounds the inner and outer circumferential surfaces, the outer shell is provided with a first port and a second port penetrating the outer shell, the inner shell is provided with a third port penetrating the inner shell, the first port and the third port are connected to form the outlet, the pressure reducing member is suitable for connecting with the reboiler through the second port, and the first inlet and the second inlet are formed on the inner shell.

[0012] In some embodiments, the pressure reducing component is a heat exchange tube, which is arranged in the channel, the heat exchange tube is suitable for being connected to the reboiler and the inner circumferential surface of the heat exchange tube defines the channel so that the gas-liquid mixture flowing out of the reboiler flows into the heat exchange tube, the heat exchange tube is arranged in the installation cavity and surrounds the inner shell so that the gas-liquid mixture in the heat exchange tube heats the rich liquid in the inner shell, and the heat exchange tube is respectively connected to multiple first inlets and multiple second inlets so that the gas-liquid mixture in the heat exchange tube flows into the first inlet and the second inlet.

[0013] In some embodiments, the regeneration tower further includes a flow valve, which is disposed on the pressure reducing member and communicates with the passage, so that the flow valve controls the flow rate flowing into the pressure reducing member.

[0014] In some embodiments, the number of the plurality of first inlets is 3-5, and / or the number of the plurality of second inlets is 3-5.

[0015] In some embodiments, in a projection plane orthogonal to the inner and outer directions, a distance between a center line of the first inlet and a center line of the second inlet is 1.4 m-1.5 m.

[0016] In some embodiments, the regeneration tower further includes a plurality of first liquid distributors and a plurality of second liquid distributors, wherein the plurality of first liquid distributors are arranged one by one in the plurality of first inlets so that the gas-liquid mixture flowing out of the reboiler flows evenly into the tower body through the first liquid distributors, and the plurality of second liquid distributors are arranged one by one in the second inlets so that the gas-liquid mixture flowing out of the reboiler flows evenly into the tower body through the second liquid distributors.

[0017] The flue gas treatment device according to an embodiment of the present invention includes: an absorption tower, wherein a lean liquid is provided in the absorption tower and is suitable for passing flue gas so that the lean liquid absorbs carbon dioxide in the flue gas to convert the lean liquid into a rich liquid; a regeneration tower, wherein the regeneration tower is the regeneration tower of any one of the above embodiments, wherein one end of the regeneration tower is connected with one end of the absorption tower so that the rich liquid in the absorption tower flows into the regeneration tower so that the rich liquid is decomposed into the lean liquid, and the other end of the regeneration tower is connected with the other end of the absorption tower so that the lean liquid in the regeneration tower flows into the absorption tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a flue gas treatment device according to an embodiment of the present invention.

[0019] Flue gas treatment device 100;

[0020] Absorption tower 1;

[0021] Regeneration tower 2; chamber 21; outlet 22; first inlet 23; second inlet 24; outer tower 25; inner tower 26;

[0022] Reboiler 3;

[0023] Pressure reducing member 4; heat exchange tube 41; channel 42; first channel 421; second channel 422; flow valve 5. DETAILED DESCRIPTION

[0024] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0025] The regeneration tower 2 according to an embodiment of the present invention will be described below with reference to the drawings.

[0026] like Figure 1 As shown, the regeneration tower 2 according to the embodiment of the present invention includes a tower body and a decompression member 4.

[0027] The tower body has a chamber 21, an outlet 22, a plurality of first inlets 23 and a plurality of second inlets 24, the plurality of first inlets 23 and the plurality of second inlets 24 are all connected to the chamber 21, the plurality of first inlets 23 and the plurality of second inlets 24 are arranged at intervals along the circumference of the tower body, and the plurality of first inlets 23 and the plurality of second inlets 24 are arranged at intervals along the vertical direction, and the outlet 22 is suitable for being connected to the reboiler 3, so that the rich liquid in the tower body flows into the reboiler 3 so that the reboiler 3 heats the rich liquid into a gas-liquid mixture. Specifically, as Figure 1 As shown, the tower body is a tower body extending in the up-down direction, the outlet 22, multiple first inlets 23 and multiple second inlets 24 are all formed on the tower body in the up-down direction and are arranged adjacent to the bottom of the tower body, the outlet 22 is connected with the inlet of the reboiler 3, so that the rich liquid in the tower body flows into the reboiler 3, and the multiple first inlets 23 and the multiple second inlets 24 can all be connected with the outlet of the reboiler 3, so that the gas-liquid mixture heated by the reboiler 3 flows into the tower body through the multiple first inlets 23 and the multiple second inlets 24.

[0028] The pressure reducing member 4 includes a plurality of channels 42, which are sequentially arranged along the circumference of the tower body, the channels 42 extending in the up-down direction, the upper end of the channel 42 communicating with an adjacent channel 42, the lower end of the channel 42 communicating with another adjacent channel 42, the two ends of the channel 42 communicating with the first inlet 23 and the second inlet 24, respectively, and at least one channel 42 is adapted to communicate with the reboiler 3, so that the gas-liquid mixture flowing out of the reboiler 3 flows into the first inlet 23 and the second inlet 24 through the subsection. Specifically, as Figure 1 As shown, the pressure reducing member 4 surrounds the outer peripheral surface of the tower body and extends along the circumference of the tower body, and a plurality of channels 42 are sequentially arranged along the circumference of the tower body. The upper end of the channel 42 is communicated with the upper end of the adjacent left channel 42, and the lower end of the channel 42 is communicated with the adjacent right channel 42. The upper and lower ends of the channel 42 are respectively communicated with the first inlet 23 and the second inlet 24, and one of the channels 42 is communicated with the outlet of the reboiler 3, thereby allowing the gas-liquid mixture in the reboiler 3 to flow into the channel 42, and flow into the first inlet 23 and the second inlet 24 through the channel 42.

[0029] The regeneration tower 2 of the embodiment of the present invention is provided with a pressure reducing member 4, through which the gas-liquid mixture in the reboiler 3 flows into the pressure reducing member 4. Since a plurality of channels 42 are provided in the pressure reducing member 4, the gas-liquid mixture can flow in the plurality of channels 42, thereby reducing the flow rate of the gas-liquid mixture, preventing the gas-liquid mixture from flowing into the tower body and causing excessive impact on the internal parts, thereby extending the service life of the regeneration tower 2. In addition, a plurality of first inlets 23 and a plurality of second inlets 24 are provided on the tower body, thereby ensuring that the gas-liquid mixture flows evenly into the tower body, improving the distribution effect of the gas-liquid mixture, and thus improving the regeneration effect of the regeneration tower 2.

[0030] In some embodiments, the multiple channels 42 include multiple first channels 421 and multiple second channels 422, and the multiple first channels 421 and the multiple second channels 422 are alternately arranged along the circumference of the tower body. The first channels 421 extend from top to bottom and are inclined away from one side of the second channels 422, and the second channels 422 extend from top to bottom and are inclined away from one side of the first channels 421. The upper end of the first channel 421 is connected to the upper end of an adjacent second channel 422, the lower end of the first channel 421 is connected to the lower end of another adjacent second channel 422, the upper end of the first channel 421 is connected to the first inlet 23, and the lower end of the second channel 422 is connected to the second inlet 24. Specifically, the number of multiple first channels 421 and the number of multiple second channels 422 are equal and are arranged in sequence along the circumference of the tower body. The first channel 421 extends from top to bottom and tilts from right to left, the second channel 422 extends from top to bottom and tilts from left to right, and the upper end of the first channel 421 is connected to the upper end of the second channel 422 adjacent to the right side, the lower end of the first channel 421 is connected to the lower end of the second channel 422 adjacent to the left side, and the upper end of the first channel 421 is connected to the first inlet 23, and the lower end of the first channel 421 is connected to the second channel 422, thereby allowing the gas-liquid mixture to flow continuously in the pressure reducing member 4, avoiding flow dead corners, and making the setting of the pressure reducing member 4 more reasonable.

[0031] In some embodiments, the tower body includes an outer tower 25 and an inner tower 26, the inner tower 26 is arranged in the outer tower 25, and the inner circumference of the outer tower 25 and the outer circumference of the inner tower 26 are arranged in an inner and outer direction to form a mounting cavity, the pressure reducing member 4 is arranged in the mounting cavity and surrounds the inner and outer circumferences, the outer shell is provided with a first port and a second port penetrating the outer shell, the inner shell is provided with a third port penetrating the inner shell, the first port and the third port are connected to form an outlet 22, the pressure reducing member 4 is suitable for connecting with the reboiler 3 through the second port, and the first inlet 23 and the second inlet 24 are formed on the inner shell. Specifically, as Figure 1As shown, the inner tower 26 is arranged in the outer tower 25, and the outer circumferential surface of the inner tower 26 and the inner circumferential surface of the outer tower 25 are spaced apart to form a mounting cavity, so as to provide a mounting base for the decompression component 4, prevent the decompression component 4 from being exposed to the outside and causing wear, and extend the service life of the decompression component 4, and the first port and the third port are spaced apart along the inner and outer directions, the inlet of the reboiler 3 is connected to the tower body through a pipeline passing through the first port and the third port, the outlet of the reboiler 3 is connected to the inlet of the decompression component 4 through the second port, and a plurality of first inlets 23 and a plurality of second inlets 24 are formed on the inner shell, thereby making the arrangement of the tower body more reasonable.

[0032] In some embodiments, the pressure reducing component 4 is a heat exchange tube 41, which is disposed in a channel 42. The heat exchange tube 41 is suitable for being connected to the reboiler 3 and the inner circumferential surface of the heat exchange tube 41 defines a channel 42 so that the gas-liquid mixture flowing out of the reboiler 3 flows into the heat exchange tube 41. The heat exchange tube 41 is disposed in the installation cavity and surrounds the inner shell so that the gas-liquid mixture in the heat exchange tube 41 heats the rich liquid in the inner shell. The heat exchange tube 41 is respectively connected to a plurality of first inlets 23 and a plurality of second inlets 24 so that the gas-liquid mixture in the heat exchange tube 41 flows into the first inlet 23 and the second inlet 24.

[0033] Specifically, Figure 1 As shown, the heat exchange tube 41 includes a plurality of first sub-tubes and a plurality of second sub-tubes, and the plurality of first sub-tubes and the plurality of second sub-tubes are alternately arranged along the circumferential interval of the inner shell, and the upper and lower parts of the first sub-tubes are connected with the two adjacent sub-tubes, and the first sub-tubes extend from top to bottom and tilt from right to left, and the second sub-tubes extend from top to bottom and tilt from left to right. The plurality of first sub-tubes and the plurality of second sub-tubes make the heat exchange tube 41 substantially wavy, and the heat exchange tube 41 surrounds the outer circumferential surface of the inner shell and is located in the installation cavity, and the inner circumferential surface of the heat exchange tube 41 defines a channel 42, thereby, not only can the high temperature gas-liquid mixture generated by the reboiler 3 be utilized The mixture heats the rich liquid in the inner shell through the heat exchange tube 41, thereby improving the heat utilization rate and reducing the temperature of the gas-liquid mixture to reduce the flow rate of the gas-liquid mixture. A plurality of first connecting ports and a plurality of second connecting ports are provided on the heat exchange tube 41. The first connecting port is formed at the upper end of the first sub-tube, and the second connecting port is formed at the lower end of the second sub-tube. The plurality of first connecting ports are connected to the plurality of first inlets 23 in a one-to-one correspondence, and the plurality of second connecting ports are connected to the plurality of second inlets 24 in a one-to-one correspondence, so that the gas-liquid mixture in the heat exchange tube 41 flows into the tower body through the plurality of first connecting ports and the plurality of second connecting ports.

[0034] In some embodiments, the regeneration tower 2 further includes a flow valve 5, which is disposed on the pressure reducing member 4 and communicates with the channel 42, so that the flow valve 5 controls the flow rate flowing into the pressure reducing member 4. Specifically, Figure 1 As shown, the inlet of the flow valve 5 is connected to the outlet of the reboiler 3, and the outlet of the flow valve 5 is connected to the inlet of the pressure reducing valve, thereby, the flow rate of the gas-liquid mixture flowing into the pressure reducing component 4 can be controlled by the flow valve 5.

[0035] In some embodiments, the number of the plurality of first inlets 23 is 3-5, and / or the number of the plurality of second inlets 24 is 3-5. Figure 1 As shown, the number of the first inlets 23 can be any one of 3, 4, and 5, and the number of the second inlets 24 can be any one of 3, 4, and 5. When the number of the first inlets 23 and the second inlets 24 is less than 3, resulting in a small number of first inlets 23 and the second inlets 24, in order to ensure the regeneration efficiency of the regeneration tower 2, the openings of the first inlets 23 and the second inlets 24 will be larger, thereby causing the local structural strength of the tower body to decay. When the number of the first inlets 23 and the second inlets 24 is greater than 5, resulting in a large number of first inlets 23 and the second inlets 24, it will also cause the local structural strength of the tower body to decay. Therefore, the number of the first inlets 23 and the second inlets 24 is 3-5, which ensures the regeneration efficiency of the regeneration tower 2 while also ensuring the strength and service life of the tower body.

[0036] In some embodiments, in the projection plane in the vertical direction, a plurality of first inlets 23 and a plurality of second inlets 24 are alternately arranged one by one along the circumference of the tower body. Figure 1 As shown, the number of the first inlets 23 is equal to the number of the second inlets 24, and the plurality of first inlets 23 and the plurality of second inlets 24 are alternately arranged one by one along the circumference of the tower body, thereby making the gas-liquid mixture more evenly distributed in the entire tower body.

[0037] In some embodiments, in a projection plane orthogonal to the inner and outer directions, the distance between the center line of the first inlet 23 and the center line of the second inlet 24 is 1.4m-1.5m. Figure 1 As shown, the spacing between the center line of the first inlet 23 and the center line of the second inlet 24 is any one of 1.4m, 1.42m, 1.44m, 1.46m, 1.48m and 1.5m. When the center line of the first inlet 23 and the center line of the second inlet 24 is less than 1.4m, the spacing between the first inlet 23 and the second inlet 24 will be too small, thereby causing the local structural strength of the regeneration tower 2 to decay. When the center line of the first inlet 23 and the center line of the second inlet 24 is greater than 1.5m, the spacing between the first inlet 23 and the second inlet 24 will be too large, resulting in an increase in the overall height of the tower body, thereby increasing the processing and manufacturing cost of the regeneration tower 2.

[0038] In some embodiments, the regeneration tower 2 further includes a plurality of first liquid distributors (not shown in the figure) and a plurality of second liquid distributors (not shown in the figure), wherein the plurality of first liquid distributors are arranged one by one in the plurality of first inlets 23 so that the gas-liquid mixture flowing out of the reboiler 3 flows evenly into the tower body through the first liquid distributors, and the plurality of second liquid distributors are arranged one by one in the second inlet 24 so that the gas-liquid mixture flowing out of the reboiler 3 flows evenly into the tower body through the second liquid distributors. Thus, the first liquid distributor and the second liquid distributor ensure that the gas-liquid mixture can be evenly distributed to different positions of the tower body, thereby improving the mass transfer efficiency and thus improving the efficiency of the conversion from rich liquid to lean liquid.

[0039] like Figure 1 As shown, the flue gas treatment device 100 according to the embodiment of the present invention includes an absorption tower 1 and a regeneration tower 2 .

[0040] The absorption tower 1 is provided with a lean liquid and is suitable for passing flue gas so that the lean liquid absorbs carbon dioxide in the flue gas to convert the lean liquid into a rich liquid. Thus, carbon dioxide in the flue gas is absorbed by the absorption tower 1, and the lean liquid is converted into a rich liquid after absorbing carbon dioxide.

[0041] The regeneration tower 2 is any of the regeneration towers 2 in the above embodiments, and one end of the regeneration tower 2 is connected to one end of the absorption tower 1, so that the rich liquid in the absorption tower 1 flows into the regeneration tower 2, so that the rich liquid is decomposed into lean liquid, and the other end of the regeneration tower 2 is connected to the other end of the absorption tower 1, so that the lean liquid in the regeneration tower 2 flows into the absorption tower 1. Specifically, Figure 1 As shown, the outlet of the absorption tower 1 is connected to the inlet of the regeneration tower 2, and the rich liquid in the absorption tower 1 flows into the regeneration tower 2, thereby decomposing the rich liquid into lean liquid. The outlet of the absorption tower 1 is connected to the inlet of the regeneration tower 2, and the lean liquid in the regeneration tower 2 flows into the absorption tower 1.

[0042] The flue gas treatment device 100 of the embodiment of the present invention has the advantages of simple structure, low cost, and high lean liquid to rich liquid conversion efficiency.

[0043] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0048] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A regeneration tower, characterized in that: include: A tower body, wherein the tower body has a chamber, an outlet, a plurality of first inlets and a plurality of second inlets, wherein the plurality of first inlets and the plurality of second inlets are all connected to the chamber, the plurality of first inlets and the plurality of second inlets are all arranged at intervals along the circumference of the tower body, and the plurality of first inlets and the plurality of second inlets are arranged at intervals along the up-down direction, and the outlet is suitable for being connected to a reboiler so that the rich liquid in the tower body flows into the reboiler so that the reboiler heats the rich liquid into a gas-liquid mixture; A pressure reducing member, wherein the pressure reducing member comprises a plurality of channels, wherein the plurality of channels are sequentially arranged along the circumference of the tower body, wherein the channels extend in the up-down direction and the upper end of the channels is communicated with one of the adjacent channels, and the lower end of the channels is communicated with another adjacent channel, and the two ends of the channels are respectively communicated with the first inlet and the second inlet, and at least one of the channels is suitable for communicating with the reboiler so that the gas-liquid mixture flowing out of the reboiler flows into the first inlet and the second inlet through the subsection.

2. The regeneration tower according to claim 1, characterized in that: In the projection plane in the up-down direction, the plurality of first inlets and the plurality of second inlets are alternately arranged one by one along the circumference of the tower body.

3. The regeneration tower according to claim 1, characterized in that: The multiple channels include multiple first channels and multiple second channels, and the multiple first channels and multiple second channels are alternately arranged along the circumference of the tower body. The first channel extends from top to bottom and is inclined away from one side of the second channel. The second channel extends from top to bottom and is inclined away from one side of the first channel. The upper end of the first channel is communicated with the upper end of one adjacent second channel, and the lower end of the first channel is communicated with the lower end of another adjacent second channel. The upper end of the first channel is communicated with the first inlet, and the lower end of the second channel is communicated with the second inlet.

4. The regeneration tower according to claim 1, characterized in that: The tower body includes an outer tower and an inner tower, the inner tower is arranged in the outer tower, and the inner circumferential surface of the outer tower and the outer circumferential surface of the inner tower are spaced apart along the inner and outer directions to form an installation cavity, the pressure reducing member is arranged in the installation cavity and surrounds the inner and outer circumferential surfaces, the outer shell is provided with a first port and a second port penetrating the outer shell, the inner shell is provided with a third port penetrating the inner shell, the first port and the third port are connected to form the outlet, the pressure reducing member is suitable for connecting with the reboiler through the second port, and the first inlet and the second inlet are formed on the inner shell.

5. The regeneration tower according to claim 4, characterized in that: The pressure reducing component is a heat exchange tube, which is arranged in the channel. The heat exchange tube is suitable for being connected to the reboiler and the inner circumferential surface of the heat exchange tube defines the channel so that the gas-liquid mixture flowing out of the reboiler flows into the heat exchange tube. The heat exchange tube is arranged in the installation cavity and surrounds the inner shell so that the gas-liquid mixture in the heat exchange tube heats the rich liquid in the inner shell. The heat exchange tube is respectively connected to the multiple first inlets and the multiple second inlets so that the gas-liquid mixture in the heat exchange tube flows into the first inlet and the second inlet.

6. The regeneration tower according to claim 1, characterized in that: It also includes a flow valve, which is arranged on the pressure reducing member and communicated with the passage, so that the flow valve controls the flow of the pressure reducing member.

7. The regeneration tower according to claim 1, characterized in that: The number of the plurality of first inlets is 3-5, and / or the number of the plurality of second inlets is 3-5.

8. The regeneration tower according to claim 1, characterized in that: In a projection plane orthogonal to the inner and outer directions, a distance between a center line of the first inlet and a center line of the second inlet is 1.4 m-1.5 m.

9. The regeneration tower according to claim 1, characterized in that: The tower also includes a plurality of first liquid distributors and a plurality of second liquid distributors, wherein the plurality of first liquid distributors are arranged in a one-to-one correspondence in the plurality of first inlets so that the gas-liquid mixture flowing out of the reboiler flows into the tower body uniformly through the first liquid distributors. A plurality of the second liquid distributors are arranged in the second inlet in a one-to-one correspondence, so that the gas-liquid mixture flowing out of the reboiler flows into the tower body evenly through the second liquid distributors.

10. A flue gas treatment device, characterized in that: include: an absorption tower, wherein a lean liquid is arranged in the absorption tower and is suitable for passing flue gas, so that the lean liquid absorbs carbon dioxide in the flue gas to convert the lean liquid into a rich liquid; A regeneration tower, wherein the regeneration tower is the regeneration tower of any one of claims 1 to 9, wherein one end of the regeneration tower is connected to one end of the absorption tower so that the rich liquid in the absorption tower flows into the regeneration tower to decompose the rich liquid into a lean liquid, and the other end of the regeneration tower is connected to the other end of the absorption tower so that the lean liquid in the regeneration tower flows into the absorption tower.

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