Absorption tower structure and carbon capture system with same

Abstract

The invention provides an absorption tower structure and a carbon capture system with the same. The absorption tower structure comprises a tower body; the unit channels are arranged in the tower body, all the unit channels extend in the length direction of the tower body, and the unit channels are sequentially arranged in the circumferential direction of the tower body; with the radial direction of the tower body as the transverse direction, the area of the cross section of each unit channel is arranged in a preset proportion; the spraying assemblies are arranged at the tops of the unit channels, the spraying assemblies are divided into multiple groups, and the multiple groups of spraying assemblies and the multiple unit channels are arranged in a one-to-one correspondence mode; the air inlet channel is arranged at the bottom of the tower body, and the air inlet channel is selectively communicated with one or more unit channels in the unit channels. The problem that in the prior art, the smoke amount is not matched with the size of an absorption tower, and consequently gas-liquid distribution is not uniform is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of absorption towers, and in particular to an absorption tower structure and a carbon capture system having the same. Background Art

[0002] Common absorption towers are mostly packed towers or plate towers. The conversion gas enters from the lower middle part of the tower and goes up to countercurrently contact with the semi-lean liquid (amine liquid) in the middle of the tower to complete partial absorption of carbon dioxide. The residual carbon dioxide in the conversion gas is then absorbed again with the regenerated lean liquid (amine liquid) in the upper part of the tower.

[0003] However, the shift gas of this absorption tower passes through the flow surface of the tower body at full flow rate. In order to ensure a good absorption effect, a larger absorption tower is required. In addition, the impurity gas in the shift gas affects the total proportion of carbon dioxide. Therefore, the required circulation volume of semi-lean liquid and lean liquid absorbent increases, which increases the energy consumption and cost of the pre-combustion carbon capture process. Summary of the invention

[0004] The main purpose of the present invention is to provide an absorption tower structure and a carbon capture system having the same, so as to solve the problem in the prior art that the flue gas volume does not match the absorption tower size, resulting in uneven gas-liquid distribution.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided an absorption tower structure, comprising: a tower body; a plurality of unit channels, which are arranged in the tower body, each unit channel extends along the length direction of the tower body, and the plurality of unit channels are arranged in sequence along the circumferential direction of the tower body; with the radial direction of the tower body as the transverse direction, the cross-sectional area of ​​each unit channel is arranged in a predetermined proportion; a spray assembly, which is arranged at the top of the unit channel, and the spray assembly is divided into a plurality of groups, and the plurality of groups of spray assemblies are arranged one-to-one correspondingly to the plurality of unit channels; an air inlet channel, which is arranged at the bottom of the tower body, and the air inlet channel can be selectively connected to one or more of the unit channels.

[0006] Furthermore, there are three unit channels, and the area ratio of the cross sections of the three unit channels is 1:1.5:1.8.

[0007] Furthermore, there are at least three unit channels, and a smoke inlet is arranged at the bottom of the unit channel. The absorption tower structure also includes: a switch assembly, which is arranged at the smoke inlet, and at least part of the switch assembly is movably arranged to open or close the unit channel; there are multiple groups of switch assemblies, and the multiple groups of switch assemblies are arranged one-to-one correspondingly to the multiple unit channels.

[0008] Furthermore, each switch assembly includes: a door panel, which is arranged at the smoke inlet, and the door panel is rotatably arranged along a predetermined track to cover or avoid the smoke inlet.

[0009] Furthermore, the tower body is a cylindrical structure, and the absorption tower structure also includes: a partition plate, which is arranged in the tower body, extending along the length direction of the tower body, and located between two adjacent unit channels; a support column, one side of each partition plate is connected to the inner wall surface of the tower body, and the other side of each partition plate is connected to the support column.

[0010] Furthermore, the door panel is annular and is provided with a retractable corrugated structure. The door panel is sleeved on the support column and is movably arranged relative to the support column. The door panel includes a first movable end and a second movable end arranged relatively to each other in a circumferential direction; a guide groove is arranged on the inner wall surface of the tower body, and the guide groove extends along the circumferential direction of the tower body; the switch assembly also includes: a driving member, which is arranged in the guide groove, and there are two driving members, which are respectively connected to the first movable end and the second movable end of the door panel, and the first movable end and the second movable end are driven to move along the circumferential direction of the tower body by the two driving members, so that one or more of each unit channel is opened or closed.

[0011] Furthermore, a mounting groove is provided on the support column, and at least a portion of the door panel is embedded in the mounting groove.

[0012] Furthermore, the absorption tower structure also includes: a partition plate, which is arranged in the tower body, extending along the length direction of the tower body, and located between two adjacent unit channels; a support frame, which is arranged in the unit channel, and the support frame is respectively connected to the inner wall surface of the tower body and the partition plate; a filler component, which is arranged in the unit channel and located on the support frame.

[0013] Furthermore, each unit channel includes: a first channel section and a second channel section that are interconnected, the first channel section and the second channel section are arranged in sequence along the length direction of the tower body, a third channel section is arranged between the first channel section and the second channel section, and a liquid distributor is arranged in the third channel section.

[0014] According to another aspect of the present invention, a flue gas capture system is provided, comprising an absorption tower structure, wherein the absorption tower structure is the absorption tower structure described above.

[0015] According to the technical solution of the present invention, the absorption tower structure includes a tower body, multiple unit channels, multiple groups of spray assemblies and an air inlet channel. The multiple unit channels are arranged in the tower body, each unit channel extends along the length direction of the tower body, and the multiple unit channels are arranged in sequence along the circumferential direction of the tower body; the area of ​​the cross section of each unit channel is arranged in a predetermined proportion with the radial direction of the tower body as the transverse direction; the spray assembly is arranged at the top of the unit channel, and the spray assembly is in multiple groups, and the multiple groups of spray assemblies are arranged one by one with the multiple unit channels; the air inlet channel is arranged at the bottom of the tower body, and the air inlet channel can be selectively connected with one or more unit channels in each unit channel. This arrangement can select the unit channel corresponding to the actual flow rate of the flue gas to be connected with the air inlet channel, thereby ensuring the flow rate of the flue gas in the corresponding unit channel, and at the same time, the corresponding spray assembly is opened to make the gas-liquid distribution more uniform, avoiding the waste of the reaction liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 A schematic structural diagram of a first embodiment of an absorption tower structure according to the present invention is shown;

[0018] Figure 2 A top view of a unit channel in a first embodiment of an absorption tower structure according to the present invention is shown;

[0019] Figure 3 A schematic structural diagram of a door panel in a first embodiment of an absorption tower structure according to the present invention is shown;

[0020] Figure 4 A schematic diagram of the assembly of a door panel in a first embodiment of an absorption tower structure according to the present invention is shown;

[0021] Figure 5 A schematic structural diagram of a second embodiment of an absorption tower structure according to the present invention is shown;

[0022] Figure 6 A top view of a unit channel in a second embodiment of the absorption tower structure according to the present invention is shown.

[0023] The above drawings include the following reference numerals:

[0024] 1. Tower body; 2. Unit channel; 3. Spray assembly; 30. Nozzle; 31. Liquid supply main pipe; 32. Spray branch pipe; 320. Control valve; 4. Air inlet channel; 20. Smoke inlet; 5. Switch assembly; 50. Door panel; 6. Partition plate; 7. Support column; 501. First moving end; 502. Second moving end; 10. Guide groove; 51. Drive member; 70. Mounting groove; 8. Support frame; 9. Filling component; 21. First channel section; 22. Second channel section; 23. Third channel section; 24. Liquid distributor. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] As mentioned in the background technology, most absorption towers in the prior art are large in size, and the full flow of flue gas passes through the tower body. When the flow of flue gas is small, the diffusion rate in the tower body is slow, which reduces the carbon dioxide absorption efficiency and does not match the flow of the sprayed reaction liquid, resulting in uneven gas-liquid distribution and waste of reaction liquid. In order to solve the above technical problems, the absorption tower structure provided by the present invention is provided with a plurality of unit channels 2 in the tower body 1, each unit channel 2 extends along the length direction of the tower body 1 respectively, and each unit channel 2 is arranged in sequence along the circumferential direction of the tower body 1, and the cross-sectional area of ​​each unit channel 2 is arranged in a predetermined proportion, so that each unit channel 2 has a cross-sectional area of ​​a different flow cross section, and the air inlet channel 4 can be selectively connected to one or more unit channels 2 in each unit channel 2, and multiple groups of spray assemblies 3 are arranged in a one-to-one correspondence with multiple unit channels 2, so that according to the actual flow rate of the flue gas, the unit channel 2 matching its flow rate can be selected for reaction, when the flow rate of the flue gas is small, the unit channel 2 with a smaller cross-sectional area among the multiple unit channels 2 can be selected to be connected to the air inlet channel 4, so that not only the flow velocity of the flue gas in the corresponding unit channel 2 is guaranteed, but also only the spray assembly 3 above the corresponding unit channel 2 can be opened, thereby avoiding the waste of the reaction liquid, making the gas-liquid distribution more uniform, and the reaction more sufficient.

[0027] Please refer to Figures 1 to 6 The present invention provides an absorption tower structure, comprising: a tower body 1; a plurality of unit channels 2, which are arranged in the tower body 1, each unit channel 2 extends along the length direction of the tower body 1, and the plurality of unit channels 2 are arranged in sequence along the circumferential direction of the tower body 1; with the radial direction of the tower body 1 as the transverse direction, the cross-sectional area of ​​each unit channel 2 is arranged in a predetermined proportion; a spray assembly 3, which is arranged at the top of the unit channel 2, and the spray assembly 3 is divided into a plurality of groups, and the plurality of groups of spray assemblies 3 are arranged one-to-one correspondingly to the plurality of unit channels 2; an air inlet channel 4, which is arranged at the bottom of the tower body 1, and the air inlet channel 4 can be selectively communicated with one or more unit channels 2 in each unit channel 2.

[0028] The absorption tower structure provided by the present invention includes a tower body 1, a plurality of unit channels 2, a plurality of spray assemblies 3 and an air inlet channel 4, wherein the plurality of unit channels 2 are arranged in the tower body 1, each unit channel 2 extends along the length direction of the tower body 1, and the plurality of unit channels 2 are arranged in sequence along the circumferential direction of the tower body 1; the area of ​​the cross section of each unit channel 2 is arranged in a predetermined ratio with the radial direction of the tower body 1 as the transverse direction; the spray assembly 3 is arranged at the top of the unit channel 2, and the spray assembly 3 is a plurality of groups, and the plurality of spray assemblies 3 are arranged one by one corresponding to the plurality of unit channels 2; the air inlet channel 4 is arranged at the bottom of the tower body 1, and the air inlet channel 4 can be selectively connected to one or more unit channels 2 in each unit channel 2. Such an arrangement can select the unit channel 2 corresponding to the flow rate of the flue gas to be connected to the air inlet channel 4 according to the actual flow rate of the flue gas, thereby ensuring the flow rate of the flue gas in the corresponding unit channel 2, and at the same time opening the corresponding spray assembly 3 to make the gas-liquid distribution more uniform, thereby avoiding the waste of the reaction liquid.

[0029] In the first embodiment provided by the present invention, there are three unit channels 2, and the area ratio of the cross sections of the three unit channels 2 is 1:1.5:1.8.

[0030] There are at least three unit channels 2, and a smoke inlet 20 is arranged at the bottom of the unit channel 2. The absorption tower structure also includes: a switch assembly 5, which is arranged at the smoke inlet 20, and at least part of the switch assembly 5 is movably arranged to open or close the unit channel 2; there are multiple groups of switch assemblies 5, and the multiple groups of switch assemblies 5 are arranged one-to-one corresponding to the multiple unit channels 2. The opening or closing of each unit channel 2 is controlled by each switch assembly 5, so that the air intake channel 4 can be selectively connected with one or more unit channels 2. Among them, when the flow rate of the smoke is large, at least two unit channels 2 can be opened at the same time, and the corresponding spray assembly 3 can be opened at the same time to ensure that the smoke and the sprayed reaction liquid react fully.

[0031] Specifically, Figures 2 to 4 As shown, each switch assembly 5 includes: a door panel 50 disposed at the smoke inlet 20 , and the door panel 50 is rotatably disposed along a predetermined track to shield or avoid the smoke inlet 20 .

[0032] In the specific implementation process, the tower body 1 is a cylindrical structure, and the absorption tower structure also includes: a partition plate 6, which is arranged in the tower body 1, the partition plate 6 extends along the length direction of the tower body 1, and the partition plate 6 is located between two adjacent unit channels 2; a support column 7, one side of each partition plate 6 is connected to the inner wall surface of the tower body 1, and the other side of each partition plate 6 is connected to the support column 7. Since the tower body 1 is a cylindrical structure, in order to ensure that each partition plate 6 is provided with strong support, a support column 7 is provided, and the bottom of the support column 7 is connected to the bottom surface of the tower body 1, or the support column 7 is connected to the inner wall surface of the tower body 1 through the partition plate 6, and under the mutual antagonism between the partition plate 6 and the support column 7, stable support is ensured.

[0033] In this embodiment, the door panel 50 is annular, and a retractable corrugated structure is provided on the door panel 50. The door panel 50 is sleeved on the support column 7 and is movably arranged relative to the support column 7. The door panel 50 includes a first movable end 501 and a second movable end 502 arranged opposite to each other in a circumferential direction; a guide groove 10 is provided on the inner wall surface of the tower body 1, and the guide groove 10 extends along the circumferential direction of the tower body 1; the switch assembly 5 also includes: a driving member 51, which is arranged in the guide groove 10. There are two driving members 51, and the two driving members 51 are respectively connected to the first movable end 501 and the second movable end 502 of the door panel 50, and the first movable end 501 and the second movable end 502 are driven by the two driving members 51 to move along the circumferential direction of the tower body 1, so that one or more of each unit channel 2 is opened or closed. Among them, the door panel 50 is a folding fan-like structure, and a driving member 51 is used to drive the door panel 50 to fold or unfold. The driving member 51 is a driving roller, and a driving motor is arranged inside the driving roller. The driving motor drives the driving roller to move along the extension direction of the guide groove 10, thereby driving the door panel 50 to unfold or fold.

[0034] In actual application, infrared sensors are respectively arranged on the first moving end 501 and the second moving end 502 of the door panel 50. When the infrared sensors detect the position information of the partition plate 6, the control center determines which partition plate 6 the driving member 51 has moved to based on the signal responses provided by the two infrared sensors, thereby controlling whether the driving member 51 continues to move to open the corresponding unit channel 2. This arrangement is not only simple in structure and easy to control, but also improves the energy efficiency of the tower.

[0035] In order to improve the stability of the door panel 50 , a mounting groove 70 is provided on the support column 7 , and at least a portion of the door panel 50 is embedded in the mounting groove 70 .

[0036] In the specific implementation process, the absorption tower structure also includes: a partition plate 6, which is arranged in the tower body 1, the partition plate 6 extends along the length direction of the tower body 1, and the partition plate 6 is located between two adjacent unit channels 2; a support frame 8, which is arranged in the unit channel 2, and the support frame 8 is respectively connected to the inner wall surface of the tower body 1 and the partition plate 6; a filler component 9, which is arranged in the unit channel 2 and located on the support frame 8. The filler component 9 is supported by the support frame 8, and at the same time, the support frame 8 can also support the partition plate 6.

[0037] Specifically, each unit channel 2 includes: a first channel section 21 and a second channel section 22 that are interconnected, the first channel section 21 and the second channel section 22 are sequentially arranged along the length direction of the tower body 1, a third channel section 23 is arranged between the first channel section 21 and the second channel section 22, and a liquid distributor 24 is arranged in the third channel section 23. The first channel section 21 and the second channel section 22 are respectively provided with filler components 9 to absorb carbon dioxide.

[0038] In the second embodiment provided by the present invention, Figure 5 and Figure 6 As shown, there are two unit channels 2, which are separated by a partition plate 6. The difference between this embodiment and the first embodiment is that, in this embodiment, the door panel 50 is two plate bodies, and the two door panels 50 are respectively hinged on the two sides of the partition plate 6 that are oppositely arranged. The door panel 50 can be controlled to open or close by a piston rod such as a hydraulic rod or an electric push rod. Preferably, the two ends of the piston rod are respectively connected to the partition plate 6 and the door panel 50.

[0039] In the absorption tower structure of the present application, a nozzle 30, a liquid supply main pipe 31, a spray branch pipe 32 and a control valve 320 are also provided. The control valve 320 is provided on the spray branch pipe 32. The nozzle 30 is provided on the spray branch pipe 32. The liquid supply main pipe 31 is connected with the spray branch pipe 32. The spray liquid is supplied into the spray branch pipe 32 through the liquid supply main pipe 31. After that, the spray branch pipe 32 supplies the spray liquid into the nozzle 30 to spray the flue gas in the tower body 1. There are multiple spray branches 32, and the multiple spray branches 32 are provided one by one corresponding to the multiple unit channels 2. The control valve 320 is provided on each spray branch pipe 32, and the flow rate in each spray branch pipe 32 can be individually controlled to cooperate with each unit channel 2. Optionally, the spray liquid is an amine liquid.

[0040] The absorption tower structure of the present invention realizes automatic adjustment of the tower processing capacity, optimizes the gas-liquid distribution, improves the processing efficiency and energy efficiency, and reduces the maintenance cost. This tower modification design can meet the modern industry's demand for the flexibility, efficiency and economy of flue gas treatment equipment, and has broad application prospects and practical application value. With the continuous development of industrial automation and intelligence, this tower modification design is expected to become one of the mainstream technologies for industrial flue gas treatment in the future.

[0041] The absorption tower structure of the present invention has the following advantages:

[0042] Strong adaptability: The tower can adapt to different flue gas volumes, automatically adjust the processing volume, and improve processing efficiency.

[0043] Easy operation: The intelligent control system simplifies the operation process and reduces manual intervention.

[0044] Energy saving and high efficiency: Optimized gas-liquid distribution reduces energy consumption and improves the energy efficiency of the tower.

[0045] Safe and reliable: Multiple safety protections and redundant designs ensure the stable and safe operation of the system.

[0046] Low maintenance cost: Modular design and easy-to-maintain structure reduce maintenance difficulty and cost.

[0047] The present invention also provides a flue gas capture system, comprising an absorption tower structure, and the absorption tower structure is the absorption tower structure of the above embodiment.

[0048] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0049] The absorption tower structure provided by the present invention includes a tower body 1, a plurality of unit channels 2, a plurality of spray assemblies 3 and an air inlet channel 4, wherein the plurality of unit channels 2 are arranged in the tower body 1, each unit channel 2 extends along the length direction of the tower body 1, and the plurality of unit channels 2 are arranged in sequence along the circumferential direction of the tower body 1; the area of ​​the cross section of each unit channel 2 is arranged in a predetermined ratio with the radial direction of the tower body 1 as the transverse direction; the spray assembly 3 is arranged at the top of the unit channel 2, and the spray assembly 3 is a plurality of groups, and the plurality of spray assemblies 3 are arranged one by one corresponding to the plurality of unit channels 2; the air inlet channel 4 is arranged at the bottom of the tower body 1, and the air inlet channel 4 can be selectively connected to one or more unit channels 2 in each unit channel 2. Such an arrangement can select the unit channel 2 corresponding to the flow rate of the flue gas to be connected to the air inlet channel 4 according to the actual flow rate of the flue gas, thereby ensuring the flow rate of the flue gas in the corresponding unit channel 2, and at the same time opening the corresponding spray assembly 3 to make the gas-liquid distribution more uniform, thereby avoiding the waste of the reaction liquid.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An absorption tower structure, characterized in that: include: Tower body(1); A plurality of unit channels (2) are arranged in the tower body (1), each of the unit channels (2) extending along the length direction of the tower body (1), and the plurality of unit channels (2) are arranged in sequence along the circumferential direction of the tower body (1); with the radial direction of the tower body (1) as the transverse direction, the cross-sectional area of ​​each of the unit channels (2) is arranged in a predetermined ratio; A spray assembly (3) is arranged at the top of the unit channel (2), the spray assembly (3) is divided into multiple groups, and the multiple groups of the spray assembly (3) are arranged in a one-to-one correspondence with the multiple unit channels (2); An air inlet channel (4) is arranged at the bottom of the tower body (1), and the air inlet channel (4) can be selectively connected to one or more of the unit channels (2) among the unit channels (2).

2. The absorption tower structure according to claim 1, characterized in that: There are three unit channels (2), and the area ratio of the cross sections of the three unit channels (2) is 1:1.5:1.

8.

3. The absorption tower structure according to claim 1, characterized in that: The number of the unit channels (2) is at least three, and a smoke inlet (20) is provided at the bottom of the unit channel (2). The absorption tower structure further comprises: A switch assembly (5) is arranged at the smoke inlet (20), and at least a part of the switch assembly (5) is movably arranged to open or close the unit channel (2); The switch components (5) are multiple groups, and the multiple groups of switch components (5) are arranged in a one-to-one correspondence with the multiple unit channels (2).

4. The absorption tower structure according to claim 3, characterized in that: Each of the switch components (5) comprises: A door panel (50) is arranged at the smoke inlet (20), and the door panel (50) is rotatably arranged along a predetermined track to shield or avoid the smoke inlet (20).

5. The absorption tower structure according to claim 4, characterized in that: The tower body (1) is a cylindrical structure, and the absorption tower structure further comprises: A partition plate (6) is arranged in the tower body (1), the partition plate (6) extends along the length direction of the tower body (1), and the partition plate (6) is located between two adjacent unit channels (2); A support column (7), one side of each of the partition plates (6) is connected to the inner wall surface of the tower body (1), and the other side of each of the partition plates (6) is connected to the support column (7).

6. The absorption tower structure according to claim 5, characterized in that: The door panel (50) is annular, and is provided with a retractable corrugated structure. The door panel (50) is sleeved on the support column (7) and is movably arranged relative to the support column (7). The door panel (50) comprises a first movable end (501) and a second movable end (502) which are arranged opposite to each other in a circumferential direction. A guide groove (10) is provided on the inner wall surface of the tower body (1), and the guide groove (10) extends along the circumferential direction of the tower body (1); The switch assembly (5) further comprises: A driving member (51) is arranged in the guide groove (10), and there are two driving members (51). The two driving members (51) are respectively connected to the first movable end (501) and the second movable end (502) of the door panel (50), and the first movable end (501) and the second movable end (502) are driven by the two driving members (51) to move along the circumferential direction of the tower body (1), so that one or more of the unit channels (2) are opened or closed.

7. The absorption tower structure according to claim 6, characterized in that: The support column (7) is provided with a mounting groove (70), and at least a portion of the door panel (50) is embedded in the mounting groove (70).

8. The absorption tower structure according to claim 1, characterized in that: The absorption tower structure also includes: A partition plate (6) is arranged in the tower body (1), the partition plate (6) extends along the length direction of the tower body (1), and the partition plate (6) is located between two adjacent unit channels (2); A support frame (8) is arranged in the unit channel (2), and the support frame (8) is respectively connected to the inner wall surface of the tower body (1) and the partition plate (6); A packing component (9) is arranged in the unit channel (2) and located on the support frame (8).

9. The absorption tower structure according to claim 1, characterized in that: Each of the unit channels (2) comprises: A first channel section (21) and a second channel section (22) are interconnected, the first channel section (21) and the second channel section (22) are arranged in sequence along the length direction of the tower body (1), a third channel section (23) is arranged between the first channel section (21) and the second channel section (22), and a liquid distributor (24) is arranged in the third channel section (23).

10. A flue gas capture system, comprising an absorption tower structure, characterized in that: The absorption tower structure is the absorption tower structure according to any one of claims 1 to 9.

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