CN114307619B - Novel device and method for capturing carbon dioxide in circularly regenerated flue gas - Google Patents

Abstract

The invention provides a novel device and method for capturing carbon dioxide from recycled flue gas, belonging to the technical field of carbon dioxide capture. The device includes an outer shell, an inner shell, a SWIRL reaction tube, an outer flue gas inlet, an outer blower Sweeping gas inlet, outer layer flue gas treated outlet, outer layer purge gas outlet, inner layer flue gas inlet, inner layer purge gas inlet, inner layer flue gas treated outlet and inner layer purge gas outlet; SWIRL reaction tube It includes a cylindrical tube body, which is equipped with a Lavis three-dimensional structure inside the tube body, and an organic amine layer is loaded on the inner wall of the tube and the Lavis three-dimensional structure, so as to realize the capture of carbon dioxide in the flue gas close to 50‑95 °C Recycling, regenerating it at 110‑120°C increases the energy efficiency of the entire process. The invention has the advantages of small equipment area, good adsorption effect under the condition of close to flue gas temperature, high energy utilization rate, and one side can be adsorbed and the other side can be regenerated, and is suitable for application in power plant flue gas carbon dioxide capture and separation.

Description

A new device and method for capturing carbon dioxide from recycled flue gas

technical field

The invention belongs to the technical field of carbon dioxide capture, and specifically discloses a novel device and method for capturing carbon dioxide from recycled flue gas.

Background technique

Carbon dioxide emissions significantly affect climate change, more than 40% of CO ₂ is emitted by fossil fuel power plants, so economically sound CO ₂ capture technologies from power plant exhaust gases (flue gases) are the major challenges of our time one. Many new methods for capturing _CO2 are under investigation, such as advanced membranes, amine-functionalized mesoporous solid adsorbents, amine-attached metal-organic frameworks (MOFs), and high-surface-area liquid droplets. Introduced in 1930, it is the only commercially applied method for capturing _CO2 emitted by power plants.

Current commercial liquid amine-based CO ₂ capture is performed in very large absorber towers with liquid/gas surface area to volume contact ratios (A/V) on the order of 500 m ^-1 to facilitate gas/liquid interactions. Liquid amines usually require premixing with a high proportion of water to reduce viscosity, and the high heat capacity and heat of vaporization of water add significant energy deficits to the removal and regeneration process.

Furthermore, the dilution of liquid amines by water limits the ability to capture _CO2 at flue gas temperatures (greater than 100 °C). Therefore, gas-fired power plants typically cool the flue gas to below 60 °C before reabsorption, and finally reheat the _CO2 -rich waste amine/water solution to above 110 °C in a regeneration tower to release the captured _CO2 for storage and utilization, the regenerated amine is sent back to the absorber for repeated cycle _CO2 capture, which is a waste of energy to some extent. Typically, high energy consumption to operate and expensive infrastructure have prevented widespread implementation of the nearly century-old liquid amine-based technology.

Patent CN110013740A relates to a device for absorbing and capturing carbon dioxide by amine method, including absorption tower, desorption tower and other devices. The temperature of the flue gas is lowered through the cooler for adsorption, and then the temperature is raised for desorption and regeneration to realize the recycling of the adsorbent. However, the device process is complicated and consumes a lot of energy.

Patent CN102198360A proposes a process and equipment for removing _CO in flue gas by using amine solid adsorbent. However, in this method, the temperature of amine solid adsorbent to adsorb carbon dioxide is low, and the carbon dioxide adsorption efficiency is low when the flue gas temperature is high, and A large amount of heat is required for the regeneration of the amine solid adsorbent, resulting in high energy consumption.

Contents of the invention

The present invention aims to provide a new device and method for capturing carbon dioxide from recycled flue gas, which can capture carbon dioxide in the flue gas under conditions close to the temperature of the flue gas, so as to reduce the emission of carbon dioxide and realize the carbon dioxide capture device recycling.

In order to achieve the above object, the present invention provides a novel device for capturing carbon dioxide from recycled flue gas, which includes an outer shell, an inner shell, a SWIRL reaction tube, an outer flue gas inlet, an outer purge gas inlet, an outer Outlet after flue gas treatment, outer purge gas outlet, inner flue gas inlet, inner purge gas inlet, inner flue gas treated outlet and inner purge gas outlet; the SWIRL reaction tube includes a cylindrical tube body , there is a Lavis three-dimensional structure inside the tube body, and an organic amine layer is loaded on the inner wall of the tube and the Lavis three-dimensional structure; multiple SWIRL reaction tubes are installed between the outer shell and the inner shell, and the SWIRL reaction tubes The installation area is the outer reaction chamber, the two sides of the outer reaction chamber are the outer gas distribution chamber and the outer gas collection chamber, the outer gas distribution chamber communicates with the SWIRL reaction tube, and the SWIRL reaction tube communicates with the outer gas collection chamber; The inner shell is installed in the outer shell, and a plurality of SWIRL reaction tubes are installed in the inner shell. Layer gas collection chamber, the inner layer gas distribution chamber communicates with the SWIRL reaction tube, the SWIRL reaction tube communicates with the inner layer gas collection chamber; the outer layer reaction chamber and the inner layer reaction chamber are the adsorption chamber or regeneration chamber of carbon dioxide respectively, Heating device is installed on the side wall of the reaction chamber of the inner layer; the inlet of the outer layer flue gas and the inlet of the outer layer purge gas are respectively connected with the outer layer gas distribution chamber; the outlet of the outer layer flue gas after treatment and the outlet of the outer layer purge gas are connected with The outer layer gas collection chamber is connected; the inner layer flue gas inlet and the inner layer purge gas inlet are respectively connected with the inner layer gas distribution chamber; the inner layer flue gas treated outlet and the inner layer purge gas outlet are respectively connected with the inner layer gas collection chamber .

Further, the A/V value of the SWIRL reaction tube is 2000-3000m ^-1 .

Furthermore, the tube body and the Lavis three-dimensional structure of the SWIRL reaction tube are metal alloys, which are prepared by laser sintering technology.

Further, the tube body and Lavis three-dimensional structure of the SWIRL reaction tube are AlSi ₁₀ Mg or 316SS.

Further, the thickness of the organic amine layer is on the order of microns, and MEA or TEPA is used.

Further, the flue gas inlet of the outer layer is connected with the flue gas inlet of the inner layer through a pipe, and a reversing valve I is arranged on the pipe; the purge gas inlet of the outer layer and the purge gas inlet of the inner layer are connected through a pipe, and the pipe is provided with Reversing valve II; the outlet of the outer flue gas after treatment and the outlet of the inner flue gas after treatment are connected through a pipe, and a reversing valve III is installed on the pipe; the outlet of the outer layer of purge gas and the outlet of the inner layer of purge gas are connected through a pipe The pipeline is provided with a reversing valve IV, and the reversing valve IV is connected with the carbon dioxide storage tank.

Further, the heat insulation layer is installed on the side walls of the outer layer reaction chamber and the inner layer reaction chamber, and the outer layer shell and the inner layer shell are cylindrical tubes with arc-shaped ends; the outer layer shell and the inner layer shell The cylindrical section is provided with a reaction tube holder, the reaction tube holder is provided with a groove, and a through hole is arranged in the groove, and the two ends of the SWIRL reaction tube are inserted into the groove.

Further, the size of the inner shell space and the number of SWIRL reaction tubes are the same as the size of the annular space between the outer shell and the inner shell and the number of SWIRL reaction tubes; the heating device is an electric heating jacket; the thermal insulation layer layer of asbestos.

The present invention also provides a novel recycling flue gas carbon dioxide capture method, which is carried out by using the above-mentioned novel recycling flue gas carbon dioxide capture device, comprising the following steps:

S1, the flue gas at a temperature of 50-95°C enters the adsorption chamber, and the SWIRL reaction tube with the capture capacity still has no reaction to capture the carbon dioxide in the flue gas, and the captured flue gas is discharged from the adsorption chamber; at the same time The inert gas enters the regeneration chamber, the heating device is turned on to raise the temperature to 110-120°C, and the SWIRL reaction tube that has reacted due to the capture of carbon dioxide is regenerated, and the inert gas and desorbed carbon dioxide are discharged from the regeneration chamber;

S2, when the adsorption chamber is saturated and regeneration of the regeneration chamber is completed, the flow direction of the flue gas and inert gas is changed so that the flue gas enters the regeneration chamber for adsorption, and the inert gas enters the adsorption chamber to regenerate the SWIRL reaction tube;

S3, when the adsorption of the regeneration chamber is saturated, and the regeneration of the adsorption chamber is completed, repeat steps S1-S2.

The present invention has the following beneficial effects:

(1) The present invention realizes the capture of carbon dioxide in the flue gas to reduce the emission of carbon dioxide;

(2) The present invention utilizes the surface roughness of the substrate of the SWIRL reaction tube and the three-dimensional Lavis structure made of a metal alloy, and loads a micron-thick organic amine reaction layer, which improves the temperature close to the flue gas temperature (95°C). Carbon dioxide adsorption capacity;

(3) The flue gas temperature in the adsorption process of the present invention is relatively high, and the regeneration process makes full use of the temperature of the flue gas, and only needs to add a small amount of heat to complete the regeneration process;

(4) The adsorption and regeneration of the present invention can be carried out simultaneously, the process is simple, and the equipment occupies a small area.

Description of drawings

Fig. 1 is the front view of the device for capturing carbon dioxide from novel recycled flue gas;

Fig. 2 is a sectional view along the A-A direction of Fig. 1;

Fig. 3 is the front view of SWIRL reaction tube;

Fig. 4 is the sectional view along B-B direction of Fig. 3;

Figure 5 is the front view of the Lavis three-dimensional structure:

Figure 6 is a top view of the three-dimensional structure of Lavis:

Fig. 7 is a schematic diagram of the Lavis three-dimensional structure obliquely at 45°.

In the figure: 1-outer shell; 2-inner shell; 3-SWIRL reaction tube; 3.1-Lavis three-dimensional structure; 4.1-outer flue gas inlet; 4.2-outer purge gas inlet; 4.3- Outlet after treatment of the outer flue gas; 4.4-Outer purge gas outlet; 4.5-Outer reaction chamber; 4.6-Outer gas distribution chamber; 4.7-Outer gas collection chamber; 5.1-Inner flue gas inlet; 5.2- Inner purge gas inlet; 5.3-Outlet after inner flue gas treatment; 5.4-Inner purge gas outlet; 5.5-Inner reaction chamber; 5.6-Inner gas distribution chamber; 5.7-Inner gas collection chamber; 6 -Heating device; 7.1-Reversing valve I; 7.2-Reversing valve II; 7.3-Reversing valve III; 7.4-Reversing valve IV; 8-Carbon dioxide storage tank; 9-Heat insulation layer; 10-Reaction tube holder .

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

This embodiment provides a new device for capturing carbon dioxide from recycled flue gas, including an outer shell 1, an inner shell 2, a SWIRL reaction tube 3, an outer flue gas inlet 4.1, an outer purge gas inlet 4.2, an outer Layer flue gas treated exit 4.3, outer layer purge gas outlet 4.4, inner layer flue gas inlet 5.1, inner layer purge gas inlet 5.2, inner layer flue gas treated outlet 5.3, and inner layer purge gas outlet 5.4.

The SWIRL reaction tube 3 includes a cylindrical tube body, which is provided with a Lavis three-dimensional structure 3.1 inside the tube body (the typical representative of the Lavis three-dimensional structure 3.1 is MgCu ₂ or MgNi ₂ ), the inner wall of the tube and the Lavis three-dimensional structure 3.1 The organic amine layer is supported.

A plurality of SWIRL reaction tubes 3 are installed between the outer shell 1 and the inner shell 2, the SWIRL reaction tube installation area 3 is the outer layer reaction chamber 4.5, and the two sides of the outer layer reaction chamber 4.5 are outer layer gas distribution chambers 4.6 It communicates with the outer gas collection chamber 4.7, the outer gas distribution chamber 4.6 communicates with the SWIRL reaction tube 3, and the SWIRL reaction tube 3 communicates with the outer gas collection chamber 4.7.

The inner shell 2 is installed in the outer shell 1, and a plurality of SWIRL reaction tubes 3 are installed in the inner shell 2. The installation area of the SWIRL reaction tubes 3 is the inner layer reaction chamber 5.5, and the two sides of the inner layer reaction chamber 5.5 are The inner layer gas distribution chamber 5.6 and the inner layer gas collection chamber 5.7, the inner layer gas distribution chamber 5.6 communicates with the SWIRL reaction tube 3, and the SWIRL reaction tube 3 communicates with the inner layer gas collection chamber 5.7.

The outer layer reaction chamber 4.5 and the inner layer reaction chamber 5.5 are the adsorption chamber or regeneration chamber of carbon dioxide respectively, namely when the outer layer reaction chamber 4.5 is the adsorption chamber of carbon dioxide, the inner layer reaction chamber 5.5 is the regeneration chamber of carbon dioxide; When the chamber 4.5 is a regeneration chamber for carbon dioxide, the inner layer reaction chamber 5.5 is an adsorption chamber for carbon dioxide. A heating device 6 is installed on the side walls of the outer layer reaction chamber 4.5 and the inner layer reaction chamber 5.5.

The outer flue gas inlet 4.1 and the outer purge gas inlet 4.2 are connected to the outer gas distribution chamber 4.6 respectively; the outer flue gas outlet 4.3 after treatment and the outer purge gas outlet 4.4 are respectively connected to the outer gas collection chamber 4.7.

The inner flue gas inlet 5.1 and the inner purge gas inlet 5.2 communicate with the inner gas distribution chamber 5.6 respectively; the inner flue gas treated outlet 5.3 and the inner purge gas outlet 5.4 respectively communicate with the inner gas collection chamber 5.7.

Further, the tube body of the SWIRL reaction tube 3 and the Lavis three-dimensional structure 3.1 are alloy products prepared by laser sintering technology to achieve a large roughness, and the prepared material is an alloy with high thermal conductivity and strong corrosion resistance, such as AlSi ₁₀ Mg or 316SS. The A/V value of SWIRL reaction tube 3 is 2000-3000m ^-1 .

Furthermore, the thickness of the organic amine layer is on the order of microns, and pure MEA or TEPA is used to inject the pipe body and then dry it to realize the loading.

Further, in order to facilitate mutual exchange of the adsorption chamber or the regeneration chamber, the outer layer flue gas inlet 4.1 and the inner layer flue gas inlet 5.1 are connected through a pipeline, and a reversing valve I7.1 is arranged on the pipeline; the outer layer purge gas inlet 4.2 It is connected with the purge gas inlet 5.2 of the inner layer through a pipeline, and the reversing valve II 7.2 is provided on the pipeline; the outlet 4.3 of the outer layer flue gas after treatment is connected with the outlet 5.3 of the inner layer flue gas after treatment through a pipeline, and the pipeline is provided with The reversing valve Ⅲ7.3; the outer purge gas outlet 4.4 and the inner purge gas outlet 5.4 are connected through pipelines, and the reversing valve Ⅳ7.4 is set on the pipeline, and the reversing valve Ⅳ7.4 is connected with the carbon dioxide storage tank 8 . The purpose of the inert gas in this embodiment is to take away the carbon dioxide desorbed at a high temperature of 110-120°C, including but not limited to carbon dioxide, water vapor, and the like. The reversing valve is a three-way reversing valve and is remotely linked with the computer.

Further, the heat insulation layer 9 is installed on the side walls of the outer layer reaction chamber 4.5 and the inner layer reaction chamber 5.5, and the outer layer shell 1 and the inner layer shell 2 are cylindrical tubes with curved ends; the outer layer shell 1 And the cylindrical section of the inner shell 2 is provided with a reaction tube holder 10, the reaction tube holder 10 is provided with a groove, and a through hole is provided in the groove, and the two ends of the SWIRL reaction tube 3 are inserted in the groove. The size of the two ends of the SWIRL reaction tube 3 is smaller than the size of the middle part, and the size of the groove matches the size of the two ends of the SWIRL reaction tube 3 .

Further, the size of the inner shell 2 space and the number of SWIRL reaction tubes 3 are the same as the size of the annular space between the outer shell 1 and the inner shell 2 and the number of SWIRL reaction tubes, so that adsorption and regeneration can be performed simultaneously Complete; the heating device 6 is an electric heating mantle; the thermal insulation layer 9 is an asbestos layer.

The above-mentioned device is divided into inner and outer layers. When the outer layer is in the adsorption process, the inner layer is in the regeneration process. After the outer layer is adsorbed, the inner layer regeneration is just completed, and then the reaction is carried out alternately, that is, the adsorption and regeneration process is carried out at the same time, which saves the area occupied by the device. area.

The gas distribution chamber acts as a buffer, so that the gas enters the SWIRL reaction tube 3 evenly.

The function of SWIRL reaction tube 3 is: it is prepared by laser sintering technology to have a high surface roughness, so that the organic amine reaction liquid is easily loaded on the reaction tube substrate (including the inner wall of the tube and the metal alloy); the preparation material It is AlSi ₁₀ Mg or 316SS with good thermal conductivity and corrosiveness, which makes the regeneration process easier; the internal structure of the reaction tube is the Lavis three-dimensional structure 3.1, which has high space utilization and has a large A/V value. Up to 3000m ^-1 , and the thickness of the loaded reaction liquid is micron, which improves the adsorption capacity of flue gas carbon dioxide under high temperature conditions (about 95°C), and does not need a lot of extra heat during the regeneration process (110°C) Make carbon dioxide to separate out, only need supplement a little heat by heating device 6.

The thermal insulation layer 9 separates the adsorption chamber from the regeneration chamber to prevent heat loss during the regeneration process.

The reversing valve is remotely connected to the computer, and when the adsorption process is completed, the gas flow direction is automatically switched to carry out the regeneration process, realizing its automatic switching of the adsorption regeneration process.

This embodiment also provides a new method for capturing carbon dioxide from recycled flue gas, which is carried out by using the above-mentioned device for capturing carbon dioxide from novel recycled flue gas. When the outer reaction chamber 4.5 is an adsorption chamber for carbon dioxide, the inner reaction chamber 5.5 is a carbon dioxide adsorption chamber In the regeneration chamber, water vapor is used as the purge gas as an example, including the following steps.

(1) Reversing valve Ⅰ7.1 communicates with the outer layer flue gas inlet 4.1, and the temperature is 95°C. The flue gas enters between the inner and outer shells through the outer layer flue gas inlet 4.1, and the SWIRL reaction tube 3 in the outer layer reaction chamber 4.5 To capture the carbon dioxide in the flue gas, at this time, the reversing valve Ⅲ7.3 is connected with the outlet 4.3 after the treatment of the outer flue gas, and the treated flue gas is discharged from the outlet 4.3 after the treatment of the outer flue gas; the reversing valve Ⅱ7. 2 communicates with the inner layer purge gas inlet 5.2, water vapor enters the inner layer shell 2 through the inner layer purge gas inlet 5.2, and the inner layer heating device raises the water vapor to 115°C to regenerate the SWIRL reaction tube 3, and reversing Valve IV 7.4 communicates with inner purge gas outlet 5.4, and water vapor is discharged along inner purge gas outlet 5.4;

(2) When the outer layer reaction chamber 4.5 is saturated with adsorption, the inner layer reaction chamber 5.5 just completes the regeneration. At this time, adjust the reversing valve Ⅰ7.1 to communicate with the inner layer flue gas inlet 5.1, and the 95°C flue gas passes through the inner layer flue gas The gas inlet 5.1 enters the inner layer shell 2 to supplement the carbon dioxide in the flue gas, and the reversing valve Ⅲ7.3 is connected with the outlet 5.3 after the inner layer flue gas treatment, and the treated flue gas comes from the inner layer flue gas after treatment outlet 5.3 Exhaust; reversing valve Ⅱ7.2 communicates with the purge gas inlet 4.2 of the outer layer, water vapor enters between the inner and outer shells, and the outer heating device raises the water vapor to 115°C to regenerate the SWIRL reaction tube 3, and reversing Valve Ⅳ7.4 is connected with the outer purge gas outlet 4.4, and the water vapor is discharged along the outer purge gas outlet 4.4;

(3) When the adsorption process of the outer reaction chamber 4.5 is completed, the inner reaction chamber 5.5 just completes the regeneration process; the inner and outer reaction chambers alternately capture the carbon dioxide in the flue gas.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (8)

1. A device for recycling flue gas carbon dioxide capture, characterized in that it includes an outer shell, an inner shell, a SWIRL reaction tube, an outer flue gas inlet, an outer purge gas inlet, and an outer flue gas treatment Rear exit, outer layer purge gas outlet, inner layer flue gas inlet, inner layer purge gas inlet, inner layer flue gas treated outlet and inner layer purge gas outlet; The SWIRL reaction tube includes a cylindrical tube body, a Lavis three-dimensional structure is arranged inside the tube body, and an organic amine layer is loaded on the inner wall of the tube and the Lavis three-dimensional structure; A plurality of SWIRL reaction tubes are installed between the outer shell and the inner shell, the installation area of the SWIRL reaction tube is the outer reaction chamber, and the two sides of the outer reaction chamber are the outer gas distribution chamber and the outer gas collection chamber. chamber, the outer gas distribution chamber communicates with the SWIRL reaction tube, and the SWIRL reaction tube communicates with the outer gas collection chamber; The inner shell is installed in the outer shell, and a plurality of SWIRL reaction tubes are installed in the inner shell. The installation area of the SWIRL reaction tube is the inner layer reaction chamber, and the two sides of the inner layer reaction chamber are inner layer gas distribution chambers and the inner layer gas collection chamber, the inner layer gas distribution chamber communicates with the SWIRL reaction tube, and the SWIRL reaction tube communicates with the inner layer gas collection chamber; The outer layer reaction chamber and the inner layer reaction chamber are respectively adsorption chambers or regeneration chambers for carbon dioxide, and heating devices are installed on the side walls of the outer layer reaction chamber and the inner layer reaction chamber; The outer layer flue gas inlet and the outer layer purge gas inlet are respectively communicated with the outer layer gas distribution chamber; The outlet of the outer layer flue gas after treatment and the outlet of the outer layer purge gas are respectively communicated with the outer layer gas collection chamber; The inner layer flue gas inlet and the inner layer purge gas inlet are respectively communicated with the inner layer gas distribution chamber; The outlet of the inner layer flue gas after treatment and the outlet of the inner layer purge gas are respectively communicated with the inner layer gas collection chamber; The flue gas inlet of the outer layer and the flue gas inlet of the inner layer are connected through a pipe, and a reversing valve I is arranged on the pipe; The purge gas inlet of the outer layer and the purge gas inlet of the inner layer are connected through a pipeline, and a reversing valve II is arranged on the pipeline; The outlet after the flue gas treatment in the outer layer is connected with the outlet after the flue gas treatment in the inner layer through a pipeline, and a reversing valve III is installed on the pipeline; The purge gas outlet of the outer layer and the purge gas outlet of the inner layer are connected through a pipeline, and a reversing valve IV is arranged on the pipeline, and the reversing valve IV is connected with the carbon dioxide storage tank. 2 . The device for capturing carbon dioxide from recycled flue gas according to claim 1 , wherein the A/V value of the SWIRL reaction tube is 2000-3000 m ^-1 . 3. The device for capturing carbon dioxide from recycled flue gas according to claim 2, characterized in that, the tube body of the SWIRL reaction tube and the three-dimensional structure of Lavis are metal alloys prepared by laser sintering technology. 4. The device for capturing carbon dioxide from recycled flue gas according to claim 3, characterized in that, the tube body and Lavis three-dimensional structure of the SWIRL reaction tube are AlSi ₁₀ Mg or 316SS. 5. The device for capturing carbon dioxide from recycled flue gas according to claim 4, characterized in that the thickness of the organic amine layer is on the order of microns, and MEA or TEPA is used. 6. The device for recycling flue gas carbon dioxide capture according to claim 5, characterized in that, the side walls of the outer layer reaction chamber and the inner layer reaction chamber are provided with a thermal insulation layer, and the outer layer shell and the inner layer shell are A cylindrical tube with curved ends; The cylindrical section of the outer shell and the inner shell is provided with a reaction tube holder, the reaction tube holder is provided with a groove, and a through hole is arranged in the groove, and the two ends of the SWIRL reaction tube are inserted into the groove. 7. The device for recycling flue gas carbon dioxide capture according to claim 6, characterized in that, the size of the inner shell space and the number of SWIRL reaction tubes and the annular space between the outer shell and the inner shell Same size and number of SWIRL reaction tubes; The heating device is an electric heating jacket; The thermal insulation layer is asbestos layer. 8. A method for capturing carbon dioxide from recycled flue gas, characterized in that the device for capturing carbon dioxide from recycled flue gas according to any one of claims 1-7 is used, comprising the steps of: S1, the flue gas at a temperature of 50-95°C enters the adsorption chamber, and the SWIRL reaction tube with the capture capacity still has no reaction to capture the carbon dioxide in the flue gas, and the captured flue gas is discharged from the adsorption chamber; at the same time The inert gas enters the regeneration chamber, the heating device is turned on to raise the temperature to 110-120°C, and the SWIRL reaction tube that has reacted due to the capture of carbon dioxide is regenerated, and the inert gas and desorbed carbon dioxide are discharged from the regeneration chamber; S2, when the adsorption chamber is saturated and regeneration of the regeneration chamber is completed, the flow direction of the flue gas and inert gas is changed so that the flue gas enters the regeneration chamber for adsorption, and the inert gas enters the adsorption chamber to regenerate the SWIRL reaction tube; S3, when the adsorption of the regeneration chamber is saturated, and the regeneration of the adsorption chamber is completed, repeat steps S1-S2.

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