Coal-fired flue gas carbon dioxide trapping and purifying device
By designing a composite absorption tower and a multi-stage absorption and purification process, the problem of organic amine solvent pollution in coal-fired flue gas was solved, achieving efficient purification of flue gas and reuse of organic amines, reducing solvent loss and environmental pollution.
Patent Information
- Application Number
- CN202511375435.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-25
- Publication Date
- 2025-12-12
AI Technical Summary
Existing coal-fired flue gas contains organic amine solvents, resulting in high solvent loss and atmospheric pollution.
Design a carbon dioxide capture and purification device for coal-fired flue gas, including a composite absorption tower, a water washing and cooling mechanism, primary and secondary absorption mechanisms for organic amines, a purification cylinder, etc., to remove organic amines from the flue gas through a multi-stage absorption and adsorption process, and to purify the flue gas by adsorbing and purifying it with activated alumina and activated carbon dry particles.
It effectively removes organic amines entrained in flue gas, avoids atmospheric pollution, and enables the reuse of organic amines, reducing solvent loss and environmental pollution.
Smart Images
Figure CN121103092A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of coal-fired flue gas treatment, and particularly relates to a coal-fired flue gas carbon dioxide capture and purification device. BACKGROUND
[0002] In order to cope with global warming, major countries in the world have clearly defined carbon emission reduction targets. CCUS, as a bottom technology for carbon neutralization, is a major technical means to maintain the flexibility of the power system under the carbon neutralization target. Through large-scale CCUS technology, carbon dioxide capture, resource utilization and storage are realized, and the main technical problems are the high energy consumption, serious solvent degradation pollution, low equipment efficiency and poor system synergy of traditional carbon capture technology.
[0003] The flue gas discharged from the flue of the traditional oil, coal and natural gas power plant is rich in CO2. The coal-fired flue gas carbon capture technology mainly adopts the organic amine chemical absorption method, which has been widely used in existing coal-fired power plants and other flue gas CO2 capture. It is the most widely used and mature carbon capture method, and occupies an important position in large-scale emission scenarios such as coal-fired power plants.
[0004] However, there are still the following disadvantages to be solved: the discharged net flue gas is mixed with organic amine solvent, which not only causes high solvent loss, but also pollutes the atmospheric environment. SUMMARY
[0005] Based on the technical problem of the existing discharged net flue gas mixed with organic amine solvent, the present application provides a coal-fired flue gas carbon dioxide capture and purification device.
[0006] The coal-fired flue gas carbon dioxide capture and purification device provided by the present application comprises a composite absorption tower, the bottom end of the composite absorption tower is fixedly connected with a flue gas inlet pipe, the top end of the composite absorption tower is fixedly connected with a flue gas outlet pipe, a water washing and cooling mechanism, an organic amine primary absorption mechanism and an organic amine secondary absorption mechanism are sequentially and fixedly arranged in the composite absorption tower from bottom to top, a purification cylinder is fixedly arranged on the outer side of the composite absorption tower, the purification cylinder is composed of a U-shaped section and an L-shaped section, one end of the top end of the U-shaped section of the purification cylinder is fixedly connected with the flue gas outlet pipe, a pipe is fixedly connected between the upper ends of the opposite ends of the U-shaped section of the purification cylinder, an absorbent is filled in the U-shaped section of the purification cylinder, a wire mesh demister is fixedly installed at the other end of the top end of the U-shaped section of the purification cylinder, a drainage assembly is fixedly installed in the horizontal end of the L-shaped section of the purification cylinder, and a plurality of drying sleeves and a plurality of adsorption sleeves are sequentially and fixedly installed in the vertical end of the L-shaped section of the purification cylinder from top to bottom.
[0007] Preferably, the water washing and cooling mechanism comprises a water pipe, a spraying assembly is fixedly installed at the outlet end of the water pipe, a slag discharge pipe is fixedly connected with the bottom end of the composite absorption tower, a cyclone plate is fixedly installed at the lower end of the circumferential inner side of the composite absorption tower, and the cyclone plate is located at the upper end of the top end of the spraying assembly.
[0008] Preferably, a conical cover is fixedly installed at the lower end of the circumferential interior of the composite absorption tower, a rich liquid outlet pipe is fixedly connected to the lower end of the circumferential interior of the composite absorption tower, and the inlet end of the rich liquid outlet pipe is located at the lower end of the conical cover; a limiting frame is fixedly connected to the lower end of the interior of the conical cover, and a lifting piece is slidingly installed in the limiting frame; a return spring is sleeved to the lower end of the circumferential end of the lifting piece, a top cover is fixedly arranged at the top end of the lifting piece, and the diameter of the bottom end of the top cover is greater than the diameter of the top end of the conical cover.
[0009] Preferably, the organic amine primary absorption mechanism and the organic amine secondary absorption mechanism each comprise a tray, absorption filler, a cooling component, and an absorbent distributor, the cooling component of the organic amine primary absorption mechanism is an inter-stage cooling component, the cooling component of the organic amine secondary absorption mechanism is a conical screw cooling pipe, a cold source inlet is fixedly connected to the upper end of the conical screw cooling pipe, and a heat source outlet is fixedly connected to the lower end of the conical screw cooling pipe; and the inlet end of the absorbent distributor is fixedly connected to a lean liquid inlet pipe.
[0010] Preferably, an absorbent recovery pipe is fixedly connected to the middle end of one end of the U-shaped section of the purification cylinder, and an absorbent supplement pipe is fixedly connected to the lower end of the other end of the U-shaped section of the purification cylinder.
[0011] Preferably, the outlet end of the flue gas outlet pipe is located below the liquid level of the absorbent, and a flow dividing cylinder is fixedly installed at the outlet end of the flue gas outlet pipe; the bottom end of the flow dividing cylinder is fixedly connected to a plurality of straight short pipes and a plurality of long pipes, the lengths of the plurality of straight short pipes and the plurality of long pipes are different, and the ends of the plurality of long pipes are located at the other end of the U-shaped section of the purification cylinder.
[0012] Preferably, the drying sleeve and the adsorption sleeve each comprise two layers of mesh covers fixedly sleeved together, and the mesh covers are conical; a filling channel is arranged between each set of two layers of mesh covers.
[0013] Preferably, the filling channel of the drying sleeve is filled with active alumina particles, and the filling channel of the adsorption sleeve is filled with active carbon drying particles.
[0014] Preferably, the plurality of drying sleeves and the plurality of adsorption sleeves are sleeved together in sequence.
[0015] Preferably, the two ends of the connecting pipe are located above the liquid level of the absorbent, and one end of the connecting pipe is located at the lower end of the wire mesh demister.
[0016] The beneficial effects in the present application are: 10、The coal-fired flue gas carbon dioxide capture and purification device provided by the present application, flue gas passes through the water washing and cooling mechanism, the organic amine first absorption mechanism and the organic amine second absorption mechanism in the composite absorption tower in sequence, so that the flue gas is first sprayed and cooled and part of particulate matter is removed in the composite absorption tower, then the carbon dioxide in the flue gas is captured and absorbed based on the organic amine chemical absorption method, and the clean flue gas is introduced into the purification cylinder through the flue gas outlet pipe, since the purification cylinder is composed of a U-shaped section and an L-shaped section, the U-shaped section of the purification cylinder is filled with an absorbent, and a plurality of drying sleeves and a plurality of adsorption sleeves are fixedly installed in the L-shaped section of the purification cylinder in sequence from top to bottom, so that the clean flue gas is first introduced into the absorbent, the organic amine entrained in the clean flue gas is fully contacted with the absorbent and physically absorbed and dissolved, the clean flue gas overflows from the absorbent, the mist liquid in the clean flue gas is removed under the cooperation of the drainage assembly and the wire mesh demister, then the clean flue gas passes through the plurality of drying sleeves and the plurality of adsorption sleeves in sequence, the clean flue gas is first dried, and then the trace organic amine entrained in the clean flue gas is adsorbed, so that the clean flue gas discharged does not entrain organic amine, the organic amine is physically absorbed and dissolved and adsorbed, and can be reused subsequently, and the pollution of the atmospheric environment is avoided.
[0017] 11、The coal-fired flue gas carbon dioxide capture and purification device provided by the present application, the one end of the U-shaped section of the purification cylinder is fixedly connected with the absorbent recovery pipe in the middle, the lower end of the other end of the U-shaped section of the purification cylinder is fixedly connected with the absorbent supplement pipe, so that the absorbent in the U-shaped section of the purification cylinder flows slowly, the absorbent is supplemented in time and the saturated absorbent is transferred in time, so that the absorbent in the U-shaped section of the purification cylinder is always unsaturated, the organic amine entrained in the clean flue gas is efficiently absorbed, the bottom end of the shunt cylinder at the outlet end of the flue gas outlet pipe is fixedly connected with a plurality of straight short pipes and a plurality of long pipes, the lengths of the plurality of straight short pipes and the plurality of long pipes are different, and the ends of the plurality of long pipes are located at the other end of the U-shaped section of the purification cylinder, so that the clean flue gas is discharged from each position at the lower end of the U-shaped section of the purification cylinder, the absorbent is fully contacted with the clean flue gas and absorbs the organic amine, the packing channel of the drying sleeve is filled with active alumina particles, and the packing channel of the adsorption sleeve is filled with active carbon drying particles, the clean flue gas passes through the plurality of drying sleeves and the plurality of adsorption sleeves in sequence, the residual absorbent and organic amine in the clean flue gas are effectively absorbed, and the organic amine entrained in the clean flue gas is further absorbed. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 The structure diagram of the coal-fired flue gas carbon dioxide capture and purification device provided by the present application; Figure 2 The structure diagram of the composite absorption tower in the coal-fired flue gas carbon dioxide capture and purification device provided by the present application; Figure 3 The structure diagram of the purification cylinder in the coal-fired flue gas carbon dioxide capture and purification device provided by the present application; Figure 4A structure diagram of the inside of a purification cylinder of a coal-fired flue gas carbon dioxide capture and purification device is provided in the present application. Figure 5 A bottom view structure diagram of the purification cylinder of the coal-fired flue gas carbon dioxide capture and purification device is provided in the present application. Figure 6 A structure diagram of an adsorption sleeve of the coal-fired flue gas carbon dioxide capture and purification device is provided in the present application. Figure 7 A structure diagram of a flue gas outlet pipe of the coal-fired flue gas carbon dioxide capture and purification device is provided in the present application.
[0019] In the figure: 1 composite absorption tower, 2 flue gas inlet pipe, 3 water pipe, 4 spray assembly, 5 slag discharge pipe, 6 cyclone plate, 7 conical cover, 8 lifting piece, 9 rich liquid outlet pipe, 10 tray, 11 absorption filler, 12 conical spiral cooling pipe, 13 inter-stage cooling assembly, 14 absorbent distributor, 15 lean liquid inlet pipe, 16 cold source inlet, 17 heat source outlet, 18 flue gas outlet pipe, 19 purification cylinder, 20 absorbent supplement pipe, 21 absorbent recovery pipe, 22 through pipe, 23 wire mesh demister, 24 drainage assembly, 25 absorbent, 26 adsorption sleeve, 27 mesh cover, 28 filling passage, 29 shunt cylinder, 30 straight discharge short pipe, 31 long pipe, 32 drying sleeve. DETAILED DESCRIPTION
[0020] REFERENCE Figures 1-7 The coal-fired flue gas carbon dioxide capture and purification device comprises a composite absorption tower 1, the bottom end of the circumference of the composite absorption tower 1 is fixedly connected with a flue gas inlet pipe 2, the top end of the composite absorption tower 1 is fixedly connected with a flue gas outlet pipe 18, the inside of the composite absorption tower 1 is sequentially fixedly provided with a water washing and cooling mechanism, an organic amine primary absorption mechanism and an organic amine secondary absorption mechanism from bottom to top, the outside of the composite absorption tower 1 is fixedly provided with a purification cylinder 19, the purification cylinder 19 is composed of a U-shaped section and an L-shaped section, one end of the top end of the U-shaped section of the purification cylinder 19 is fixedly inserted with the flue gas outlet pipe 18, the through pipe 22 is fixedly connected between the upper ends of the opposite ends of the U-shaped section of the purification cylinder 19, the inside of the U-shaped section of the purification cylinder 19 is filled with an absorbent 25, the top end of the other end of the inside of the U-shaped section of the purification cylinder 19 is fixedly installed with a wire mesh demister 23, the inside of the horizontal end of the L-shaped section of the purification cylinder 19 is fixedly installed with a drainage assembly 24, the inside of the vertical end of the L-shaped section of the purification cylinder 19 is sequentially fixedly installed with a plurality of drying sleeves 32 and a plurality of adsorption sleeves 26 from top to bottom.
[0021] In the present application, the water washing and cooling mechanism comprises a water pipe 3, the outlet end of the water pipe 3 is fixedly installed with a spray assembly 4, the bottom end of the composite absorption tower 1 is fixedly connected with a slag discharge pipe 5, the lower end of the inside of the circumference of the composite absorption tower 1 is fixedly installed with a cyclone plate 6, and the cyclone plate 6 is located at the upper end of the top end of the spray assembly 4, the water washing tower is arranged at the bottom end of the absorption tower to form the composite absorption tower 1, the multiple towers are combined, the flue gas resistance can be effectively reduced, the land occupation and the initial investment cost of the project can be reduced, and the like. The conical cover 7 is fixedly installed at the lower end of the periphery of the composite absorption tower 1, the rich liquid outlet pipe 9 is fixedly connected to the lower end of the periphery of the composite absorption tower 1, and the inlet end of the rich liquid outlet pipe 9 is located at the lower end of the conical cover 7, so that the rich liquid can be effectively collected and discharged. The conical cover 7 is fixedly connected with a limiting frame at the lower end of the inside, and the lifting piece 8 is slidably installed in the limiting frame. The lifting piece 8 is sleeved with a return spring at the lower end of the periphery, and the top end of the lifting piece 8 is fixedly provided with a top cover. The diameter of the bottom end of the top cover is greater than the diameter of the top end of the conical cover 7. With the transmission of flue gas, the lifting piece 8 can always be away from the top end of the conical cover 7, and the top cover can reduce the area of the rich liquid falling into the water washing and cooling mechanism. The organic amine primary absorption mechanism and the organic amine secondary absorption mechanism each include a tray 10, absorption filler 11, a cooling assembly, and an absorbent distributor 14. The cooling assembly of the organic amine primary absorption mechanism is an inter-stage cooling assembly 13, and the cooling assembly of the organic amine secondary absorption mechanism is a conical spiral cooling pipe 12. The conical spiral cooling pipe 12 is fixedly connected with a cold source inlet 16 at the upper end, and is fixedly connected with a heat source outlet 17 at the lower end. The absorbent distributor 14 is fixedly connected with a lean liquid inlet pipe 15 at the inlet end. By arranging the inter-stage cooling assembly 13 and the conical spiral cooling pipe 12, the organic amine and carbon dioxide are in a low-temperature environment during the reaction and absorption, which helps to stabilize the organic amine chemical mechanism and fully capture and absorb carbon dioxide. The U-shaped section of the purification cylinder 19 is fixedly connected with an absorbent recovery pipe 21 at the middle of one end, and is fixedly connected with an absorbent supplement pipe 20 at the lower end of the other end. The absorbent 25 in the U-shaped section of the purification cylinder 19 flows slowly, which timely supplements the absorbent 25 and timely transfers the saturated absorbent 25, so that the absorbent 25 in the U-shaped section of the purification cylinder 19 is always unsaturated, and the organic amine carried in the clean flue gas is efficiently absorbed. The outlet end of the flue gas outlet pipe 18 is located below the liquid level of the absorbent 25, and is fixedly installed with a flow dividing cylinder 29. The flow dividing cylinder 29 is fixedly connected with a plurality of straight short pipes 30 and a plurality of long pipes 31 at the bottom end. The lengths of the plurality of straight short pipes 30 and the plurality of long pipes 31 are different. The ends of the plurality of long pipes 31 are located at the other end of the U-shaped section of the purification cylinder 19, so that the clean flue gas is discharged from each position at the lower end of the U-shaped section of the purification cylinder 19. The absorbent 25 is in full contact with the clean flue gas and absorbs the organic amine. The drying sleeve 32 and the adsorption sleeve 26 are each composed of two layers of mesh covers 27 fixedly sleeved, and the mesh covers 27 are conical. A filling channel 28 is arranged between each set of two layers of mesh covers 27. The filling channel 28 of the drying sleeve 32 is filled with active alumina particles, and the filling channel 28 of the adsorption sleeve 26 is filled with active carbon drying particles. The plurality of drying sleeves 32 and the plurality of adsorption sleeves 26 are sequentially sleeved. The two ends of the connecting pipe 22 are located above the liquid level of the absorbent 25, and one end of the connecting pipe 22 is located at the lower end of the wire mesh demister 23, so that the clean flue gas escaping from the two top ends of the absorbent 25 is introduced into the wire mesh demister 23 for demisting.
[0022] Working principle: The flue gas successively passes through the water washing and cooling mechanism, the primary organic amine absorption mechanism and the secondary organic amine absorption mechanism inside the composite absorption tower 1, so that the flue gas is first sprayed, cooled and part of the particulate matter is removed inside the composite absorption tower 1, then the carbon dioxide in the flue gas is captured and absorbed based on the organic amine chemical absorption method, and the clean flue gas is introduced into the purification cylinder 19 inside through the flue gas outlet pipe 18. Since the purification cylinder 19 is composed of a U-shaped section and an L-shaped section, the U-shaped section of the purification cylinder 19 is filled with an absorbent 25, and a plurality of drying sleeves 32 and a plurality of adsorption sleeves 26 are fixedly installed in the vertical end of the L-shaped section of the purification cylinder 19 from top to bottom, so that the clean flue gas first passes into the absorbent 25, so that the organic amine entrained in the clean flue gas fully contacts and physically absorbs and dissolves the absorbent 25, and the clean flue gas overflows from the absorbent 25. With the cooperation of the flow guide assembly 24 and the wire mesh demister 23, the mist liquid in the clean flue gas is removed, and then the clean flue gas successively passes through the plurality of drying sleeves 32 and the plurality of adsorption sleeves 26, so that the clean flue gas is first dried, and then the trace organic amine entrained in the clean flue gas is adsorbed, to ensure that the discharged clean flue gas does not entrain organic amine, which not only physically absorbs and dissolves and adsorbs the organic amine, but also avoids polluting the atmospheric environment; The U-shaped section of the purification cylinder 19 is fixedly connected with the absorbent recovery pipe 21 at one end, and the U-shaped section of the purification cylinder 19 is fixedly connected with the absorbent supplement pipe 20 at the other end, so that the absorbent 25 in the U-shaped section of the purification cylinder 19 flows slowly, which not only supplements the absorbent 25 in time, but also transfers the saturated absorbent 25 in time, so that the absorbent 25 in the U-shaped section of the purification cylinder 19 is always unsaturated, which efficiently absorbs the organic amine entrained in the clean flue gas. The bottom end of the shunt cylinder 29 at the outlet end of the flue gas outlet pipe 18 is fixedly connected with a plurality of straight short pipes 30 and a plurality of long pipes 31, and the lengths of the plurality of straight short pipes 30 and the plurality of long pipes 31 are different, and the ends of the plurality of long pipes 31 are located at the other end of the U-shaped section of the purification cylinder 19, so that the clean flue gas is discharged from each position at the lower end of the U-shaped section of the purification cylinder 19. The absorbent 25 fully contacts and absorbs the organic amine, the packing channel 28 inside the drying sleeve 32 is filled with active alumina particles, and the packing channel 28 inside the adsorption sleeve 26 is filled with active carbon drying particles. The clean flue gas successively passes through the plurality of drying sleeves 32 and the plurality of adsorption sleeves 26, effectively absorbing the residual absorbent 25 and organic amine in the clean flue gas, and further absorbing the organic amine entrained in the clean flue gas.
[0023] The above merely describes preferred specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art, according to the technical solution and inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. A device for capturing and purifying carbon dioxide from coal-fired flue gas, comprising a composite absorption tower (1), wherein a flue gas inlet pipe (2) is fixedly connected to the bottom circumference of the composite absorption tower (1), and a flue gas outlet pipe (18) is fixedly connected to the top of the composite absorption tower (1), characterized in that, The composite absorption tower (1) is fixedly equipped with a water washing and cooling mechanism, an organic amine primary absorption mechanism and an organic amine secondary absorption mechanism from bottom to top inside. A purification cylinder (19) is fixedly installed on the outside of the composite absorption tower (1). The purification cylinder (19) is composed of a U-shaped section and an L-shaped section. The flue gas outlet pipe (18) is fixedly inserted into one end of the top of the U-shaped section of the purification cylinder (19). A through pipe (22) is fixedly connected between the upper ends of opposite ends of the U-shaped section of the purification cylinder (19). The U-shaped section of the purification cylinder (19) is filled with absorbent (25). A wire mesh demister (23) is fixedly installed at the top of the other end of the U-shaped section of the purification cylinder (19). A flow guide assembly (24) is fixedly installed inside the horizontal end of the L-shaped section of the purification cylinder (19). Multiple drying sleeves (32) and multiple adsorption sleeves (26) are fixedly installed from top to bottom inside the vertical end of the L-shaped section of the purification cylinder (19).
2. The coal-fired flue gas carbon dioxide capture and purification device according to claim 1, characterized in that, The water washing and cooling mechanism includes a water pipe (3), and a spray assembly (4) is fixedly installed at the outlet end of the water pipe (3). A slag discharge pipe (5) is fixedly connected to the bottom end of the composite absorption tower (1). A swirl plate (6) is fixedly installed at the lower end of the inner circumference of the composite absorption tower (1), and the swirl plate (6) is located at the upper end of the top of the spray assembly (4).
3. The coal-fired flue gas carbon dioxide capture and purification device according to claim 1, characterized in that, A conical hood (7) is fixedly installed at the lower end of the circumference of the composite absorption tower (1). A rich liquid outlet pipe (9) is fixedly connected to the lower end of the circumference of the composite absorption tower (1), and the inlet end of the rich liquid outlet pipe (9) is located at the lower end of the conical hood (7). A limit frame is fixedly connected to the lower end of the circumference of the conical hood (7), and a lifting member (8) is slidably installed inside the limit frame. A reset spring is sleeved on the lower end of the circumference of the lifting member (8), and a top cover is fixedly installed at the top of the lifting member (8), and the bottom diameter of the top cover is larger than the top diameter of the conical hood (7).
4. The coal-fired flue gas carbon dioxide capture and purification device according to claim 1, characterized in that, Both the primary and secondary organic amine absorption mechanisms include a tray (10), an absorption packing (11), a cooling assembly, and an absorbent distributor (14). The cooling assembly of the primary organic amine absorption mechanism is an interstage cooling assembly (13), and the cooling assembly of the secondary organic amine absorption mechanism is a conical spiral cooling tube (12). The upper end of the conical spiral cooling tube (12) is fixedly connected to a cold source inlet (16), and the lower end of the conical spiral cooling tube (12) is fixedly connected to a heat source outlet (17). The inlet end of the absorbent distributor (14) is fixedly connected to a lean liquid inlet pipe (15).
5. The coal-fired flue gas carbon dioxide capture and purification device according to claim 1, characterized in that, An absorbent recovery pipe (21) is fixedly connected to the middle of one end of the U-shaped section of the purification cylinder (19), and an absorbent replenishment pipe (20) is fixedly connected to the lower end of the other end of the U-shaped section of the purification cylinder (19).
6. The coal-fired flue gas carbon dioxide capture and purification device according to claim 1, characterized in that, The outlet end of the flue gas outlet pipe (18) is located below the liquid surface of the absorbent (25). A diverter cylinder (29) is fixedly installed at the outlet end of the flue gas outlet pipe (18). Multiple straight short pipes (30) and multiple long pipes (31) are fixedly connected to the bottom end of the diverter cylinder (29). The lengths of the multiple straight short pipes (30) and multiple long pipes (31) are different. The ends of the multiple long pipes (31) are all located at the other end of the U-shaped section of the purification cylinder (19).
7. The coal-fired flue gas carbon dioxide capture and purification device according to claim 1, characterized in that, The drying sleeve (32) and the adsorption sleeve (26) are both made of two layers of mesh (27) fixedly connected, and the mesh (27) is conical, with a filling channel (28) provided between each set of two layers of mesh (27).
8. The coal-fired flue gas carbon dioxide capture and purification device according to claim 7, characterized in that, The filling channel (28) of the drying sleeve (32) is filled with activated alumina particles, and the filling channel (28) of the adsorption sleeve (26) is filled with activated carbon drying particles.
9. The coal-fired flue gas carbon dioxide capture and purification device according to claim 1, characterized in that, Multiple drying sleeves (32) and multiple adsorption sleeves (26) are sequentially connected.
10. A coal-fired flue gas carbon dioxide capture and purification device according to claim 1, characterized in that, Both ends of the connecting pipe (22) are above the surface of the absorbent (25), and one end of the connecting pipe (22) is located at the lower end of the wire mesh demister (23).