Flue gas dehumidification and waste heat recycling system

Abstract

The invention provides a flue gas dehumidification and waste heat recycling system, which comprises a desulfurization tower, a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a third heat exchanger and a fourth heat exchanger, wherein the desulfurization tower is internally provided with a desulfurization slurry spraying assembly and the first heat exchanger is arranged below the desulfurization slurry spraying assembly; a spray cooling assembly, a condenser and a demister are sequentially arranged in the cooling and dehumidifying tower from bottom to top; a flue gas heat exchanger is fixedly arranged in the chimney, the input end of the flue gas heat exchanger is used for receiving flue gas discharged by the combustion furnace, and the output end of the flue gas heat exchanger communicates with the desulfurization tower; the waste heat recovery device comprises a second heat exchanger and a pump body, and the pump body sequentially pumps an external water source to the second heat exchanger and the first heat exchanger through pipelines for heat exchange. According to the system, the spraying cooling assembly, the condenser and the demister are arranged to fully cool and dehumidify flue gas, the flue gas heat exchanger is arranged in the chimney to reduce chimney rain accumulated near the chimney or in a low-altitude area, and the waste heat recovery device is arranged to recycle heat in the flue gas.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas treatment, and in particular to a flue gas dehumidification and waste heat recovery and reuse system. Background Art

[0002] The flue gas discharged from the combustion furnace is almost saturated with water after wet desulfurization. After being discharged from the chimney, the saturated humidity flue gas is rapidly cooled by the low-temperature atmosphere, and the water vapor in the flue gas condenses into liquid, resulting in the phenomenon of white wet smoke plume visible to the naked eye. Liquid droplets easily fall around the chimney to form chimney rain, which will affect the surrounding environment. In addition, there is still a certain amount of waste heat in the flue gas discharged after desulfurization that is not utilized, and direct discharge will cause a waste of resources. Summary of the invention

[0003] The main purpose of the present invention is to provide a flue gas dehumidification and waste heat recovery and reuse system to solve the problems in the prior art that the flue gas humidity is high, forming chimney rain that affects the surrounding environment, and the exhaust flue gas still contains a certain amount of heat, and direct discharge will cause heat waste.

[0004] In order to solve the above problems, the present invention adopts the following technical scheme: a flue gas dehumidification and waste heat recovery and reuse system, comprising: a desulfurization tower, a first air inlet and a first exhaust port are respectively provided at the bottom and the top of the tower, a desulfurization slurry spray assembly and a first heat exchanger arranged below the desulfurization slurry spray assembly are arranged inside the desulfurization tower; a cooling and dehumidification tower, a second air inlet and a second exhaust port are respectively provided at the bottom and the top of the tower, the second air inlet is connected with the first exhaust port, and a spray cooling assembly, a condenser and a demister are arranged between the second air inlet and the second exhaust port from bottom to top; a chimney, a flue gas heat exchanger is fixedly provided inside the chimney, the input end of the flue gas heat exchanger is used to receive the flue gas discharged from the combustion furnace, and the output end of the flue gas heat exchanger is connected with the first air inlet; a waste heat recovery device, comprising a second heat exchanger and a pump body for dissipating heat from the liquid in the condenser, the pump body pumps an external water source to the second heat exchanger and the first heat exchanger in sequence through a pipeline for heat exchange.

[0005] Furthermore, in the cooling and dehumidification tower, cleaning nozzles are respectively provided on the upper and lower sides of the condenser, and the output end of each cleaning nozzle faces the condenser.

[0006] Furthermore, there are multiple desulfurization slurry spraying assemblies, which are arranged at intervals along the axial direction of the desulfurization tower, and a filter layer is provided below each of the desulfurization slurry spraying assemblies.

[0007] Furthermore, the bottom ends of the desulfurization tower and the cooling and dehumidification tower are liquid storage layers, a first circulation pump is fixedly provided on one side of the desulfurization tower, the input end of the first circulation pump is connected to the liquid storage layer of the desulfurization tower, and the output end of the first circulation pump is connected to each of the slurry spraying components, a second circulation pump is fixedly provided on one side of the cooling and dehumidification tower, the input end of the second circulation pump is connected to the liquid storage layer of the cooling and dehumidification tower, and the output end of the second circulation pump is connected to the spray cooling component.

[0008] Furthermore, the spray cooling assembly includes a plurality of spray parts, and the plurality of spray parts are evenly arranged along the outer circumference of the cooling and dehumidification tower, one end of each of the spray parts passes through the side wall of the cooling and dehumidification tower and extends toward the central axis direction of the cooling and dehumidification tower, and the other end of each of the spray parts is detachably connected to the cooling and dehumidification tower.

[0009] Furthermore, each of the spray parts includes a spray pipe and a plurality of spray heads connected to the spray pipe, the plurality of spray heads are evenly arranged along the axial direction of the spray pipe, an inflation pipe is provided on one side of the spray pipe, and the inflation pipe is respectively connected to one side of the plurality of spray heads through a plurality of connecting pipes, and a water supply assembly and an air supply assembly are fixedly provided on the outer wall of the cooling and dehumidification tower for providing high-pressure water and air to the inflation pipe and the inflation pipe.

[0010] Furthermore, the water supply component includes an annular water supply channel, which is fixedly mounted on the outer wall of the cooling and dehumidification tower, and the water supply channel is connected to the multiple spray pipes through multiple water pipe joints, and a liquid inlet is provided on one side of the water supply channel. The air supply component includes an annular air supply channel, which is fixedly mounted on the outer wall of the cooling and dehumidification tower, and the air supply channel is connected to the multiple spray pipes through multiple air pipe joints, and an air filling port is provided on one side of the air supply channel.

[0011] Furthermore, a plurality of first flanges are fixedly provided on the outer peripheral surface of the cooling and dehumidification tower, a second flange is fixedly provided on one end of the spray part away from the central axis of the cooling and dehumidification tower, and the first flange and the second flange are fixedly connected by bolts.

[0012] Furthermore, the spray part also includes a fixed block inserted on the second flange plate, the axial length of the fixed block is greater than or equal to the thickness of the side wall of the cooling and dehumidification tower, and one end of the spray pipe and the inflation pipe are fixedly inserted in the fixed block and extend through the fixed block in a direction away from the cooling and dehumidification tower.

[0013] Furthermore, there are multiple spray cooling components, and the multiple spray cooling components are arranged at intervals along the axial direction of the cooling and dehumidification tower.

[0014] The beneficial effects of the present invention are: 1. By setting up a spray cooling component, a condenser and a demister, the flue gas can be fully cooled and dehumidified. The flue gas heat exchanger installed in the chimney can heat the flue gas after cooling and dehumidification, so that the flue gas has stronger lifting and diffusion capabilities when discharged, which helps the flue gas to better integrate into the atmosphere and reduce the accumulation of chimney rain near the chimney or in the low-altitude area, thereby reducing pollution to the environment. By setting up a waste heat recovery device, the external water source can be heated step by step to gradually increase the water temperature, and the precise control and efficient use of the water temperature can be achieved through the step-by-step heating method.

[0015] 2. The first flange and the second flange are provided to realize a detachable connection between the spray part and the cooling and dehumidifying tower, so as to facilitate maintenance or replacement during practical use; 3. By setting up the spray part, when the liquid and high-pressure air are mixed in the spray head 2312, they form a gas-liquid two-phase mixture, and the bubbles expand under the negative pressure gradient, doing work on the liquid to increase its momentum, thereby generating thrust or injection effect, thereby better absorbing the heat in the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Figure 1 This is a system flow chart of the flue gas dehumidification and waste heat recovery and reuse system of the present invention; Figure 2 It is a schematic diagram of the installation structure of the spray cooling component of the present invention; Figure 3 for Figure 2 Side view of Figure 4 for Figure 2 A top view of Figure 5 It is a schematic diagram of the structure of the spray part of the present invention.

[0018] Description of Reference Numerals 1. Desulfurization tower; 11. First air inlet; 12. First exhaust port; 13. Desulfurization slurry spray assembly; 14. First heat exchanger; 15. Filter layer; 16. Liquid storage layer; 17. First circulation pump; 2. Cooling and dehumidification tower; 21. Second air inlet; 22. Second exhaust port; 23. Spray cooling assembly; 231. Spraying part; 2311. Spray pipe; 2312. Spray head; 2313. Inflatable pipe; 2314. Water supply channel; 2315. Water pipe joint; 2 316. Liquid inlet; 2317. Air supply channel; 2318. Air pipe joint; 2319. Inflating port; 2320. Second flange; 2321. Fixing block; 2322. Connecting pipe; 24. Condenser; 25. Defogger; 26. Cleaning nozzle; 27. Second circulating pump; 28. First flange; 3. Chimney; 31. Third air inlet; 32. Third air outlet; 33. Flue gas heat exchanger; 4. Waste heat recovery device; 41. Second heat exchanger; 42. Pump body. DETAILED DESCRIPTION

[0019] The technical scheme in the embodiment of the present invention is described clearly and completely below in conjunction with the accompanying drawings in the embodiment of the present invention. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0020] See also Figure 1 As shown, a flue gas dehumidification and waste heat recovery and reuse system includes a desulfurization tower 1, a cooling and dehumidification tower 2, a chimney 3, and a waste heat recovery device 4 for recovering the waste heat of the flue gas. In this embodiment, the desulfurization tower 1, the cooling and dehumidification tower 2, and the chimney 3 are connected in sequence to desulfurize, cool and dehumidify the flue gas discharged from the combustion furnace, and then discharge it through the chimney 3.

[0021] Specifically, the lower part and the top part of the desulfurization tower 1 are respectively provided with a first air inlet 11 and a first exhaust port 12, and the desulfurization tower 1 is provided with a desulfurization slurry spray assembly 13 and a first heat exchanger 14 arranged below the desulfurization slurry spray assembly 13. Among them, the desulfurization slurry spray assembly 13 can adopt the spraying equipment in the prior art, which will not be repeated here. During implementation, the flue gas in the combustion furnace is discharged to the first air inlet 11 located at the lower part of the desulfurization tower 1, and the slurry (acidic liquid or alkaline liquid to achieve the purpose of flue gas desulfurization) sprayed by the desulfurization slurry spray assembly 13 desulfurizes the flue gas. At the same time, the slurry will absorb part of the temperature of the flue gas, that is, the slurry can initially cool the flue gas, and then the desulfurized flue gas is discharged through the first exhaust port 12. In this process, the first heat exchanger 14 will absorb the heat of the flue gas and the heat of the slurry sprayed by the desulfurization slurry spray assembly 13.

[0022] In this embodiment, the bottom of the interior of the desulfurization tower 1 is a liquid storage layer 16 for storing the slurry sprayed by the desulfurization slurry spray assembly 13. A first circulation pump 17 is fixedly provided on one side of the desulfurization tower 1. The input end of the first circulation pump 17 is connected to the liquid storage layer 16 of the desulfurization tower 1, and the output end of the first circulation pump 17 is connected to each desulfurization slurry spray assembly 13 to circulate the slurry sprayed by the desulfurization slurry spray assembly 13. The slurry is cooled by setting the first heat exchanger 14 to prevent the slurry temperature from being too high and causing damage to the first circulation pump 17.

[0023] Preferably, there are multiple desulfurization slurry spraying assemblies 13, which are arranged at intervals along the axial direction of the desulfurization tower 1. In this embodiment, the number of desulfurization slurry spraying assemblies 13 is two, but it is not limited to this. The number of desulfurization slurry spraying assemblies 13 can be set according to actual conditions. Further, a filter layer 15 is provided below each desulfurization slurry spraying assembly 13 to filter dust and foreign matter in the flue gas. The filter layer 15 is a prior art, which can be ceramsite, quartz sand, etc., and can be determined according to the nature, temperature, humidity of the flue gas, and the specific requirements of the desulfurization process, which will not be repeated here.

[0024] The lower part and the top of the cooling and dehumidifying tower 2 are respectively provided with a second air inlet 21 and a second exhaust port 22. The second air inlet 21 is connected to the first exhaust port 12 and is used to receive the flue gas in the desulfurization tower 1. A spray cooling component 23, a condenser 24 and a demister 25 are arranged in sequence from bottom to top between the second air inlet 21 and the second exhaust port 22. During implementation, the flue gas after desulfurization enters the interior of the cooling and dehumidifying tower 2 from the second air inlet 21, and then the flue gas is dehumidified by spray cooling, condenser 24 and demister 25 in sequence, and the flue gas after cooling and dehumidification is discharged to the chimney 3 through the second exhaust port 22. Preferably, the spray cooling component 23 can be set to multiple, and the multiple spray cooling components 23 are arranged at intervals along the axial direction of the cooling and dehumidifying tower 2 to fully cool the flue gas.

[0025] Among them, the condenser 24 is a prior art, and the flue gas in the cooling and dehumidification tower 2 is cooled by a refrigerant (refrigerant). Specifically, the condenser 24 circulates the refrigerant to reduce the surface temperature of the condenser 24, and the water vapor in the air condenses into water after contacting the cold surface, thereby achieving a dehumidification effect. The demister 25 is an inertial demister or a corrugated plate in the prior art, which is used to further dehumidify the flue gas, and will not be described in detail here.

[0026] Preferably, in the cooling and dehumidifying tower 2, cleaning nozzles 26 are respectively provided on the upper and lower sides of the condenser 24, and the output end of each cleaning nozzle 26 is directed toward the condenser 24. The condenser 24 is cleaned regularly to prevent dust in the flue gas from clogging the condenser 24, affecting the passage of the flue gas or affecting the heat exchange of the condenser 24.

[0027] The bottom end of the interior of the cooling and dehumidification tower 2 is a liquid storage layer 16. A second circulation pump 27 is fixedly provided on one side of the cooling and dehumidification tower 2. The input end of the second circulation pump 27 is connected to the liquid storage layer 16 of the cooling and dehumidification tower 2, and the output end of the second circulation pump 27 is connected to the spray cooling component 23, so that the liquid (process water) sprayed out of the spray cooling component 23 can be recycled.

[0028] In this embodiment, a third air inlet 31 is provided at the bottom of the chimney 3, a third exhaust port 32 is provided at the top of the chimney 3, a flue gas heat exchanger 33 is fixedly provided inside the chimney 3, the input end of the flue gas heat exchanger 33 is used to receive the flue gas exhausted by the combustion furnace, and the output end of the flue gas heat exchanger 33 is connected to the first air inlet 11. During implementation, the flue gas that has been cooled and dehumidified enters the interior of the chimney 3 from the third air inlet 31, then undergoes heat exchange through the flue gas heat exchanger 33, and is then exhausted through the third exhaust port 32.

[0029] It should be noted that, since the high-temperature flue gas in the combustion furnace is directly discharged into the flue gas heat exchanger 33, the flue gas temperature is approximately equal to 130°C at this time, so the flue gas that has been cooled and dehumidified can be heated. In order to further precipitate the moisture in the flue gas, and at the same time increase the temperature of the flue gas to reduce the density of the flue gas, so that the flow rate of the flue gas through the third exhaust port 32 gradually increases, and then the flue gas has a stronger lifting force and diffusion ability when discharged, which helps the flue gas to better integrate into the atmosphere, reduce the accumulation near the chimney 3 or in the low-altitude area to form chimney 3 rain, thereby reducing pollution to the environment. That is, by heating the flue gas after desulfurization and dehumidification again, the water vapor therein is kept in a gaseous state, the formation of white smoke is reduced, and the air quality is improved.

[0030] The waste heat recovery device 4 includes a second heat exchanger 41 and a pump body 42. The pump body 42 pumps the external water source through the pipeline to the second heat exchanger 41 and the first heat exchanger 14 in sequence for heat exchange. Among them, the second heat exchanger 41 is a prior art, which is used to dissipate the heat of the liquid in the condenser 24. Specifically, the condenser 24 exchanges heat with the flue gas in the cooling and dehumidification tower 2 at a low temperature, and the second heat exchanger 41 is used to discharge the heat in the refrigerant. The heat is gradually transferred to the external water source by using the second heat exchanger 41 and the first heat exchanger 14, and the water temperature is gradually increased by heating step by step, thereby realizing the gradual increase of the water temperature. At the same time, the water temperature can be accurately controlled and efficiently utilized by heating step by step.

[0031] See also Figures 2 to 5As shown, in this embodiment, the spray cooling assembly 23 includes a plurality of spray parts 231, and the plurality of spray parts 231 are evenly arranged along the outer periphery of the cooling and dehumidifying tower 2, and one end of each spray part 231 respectively passes through the side wall of the cooling and dehumidifying tower 2 and extends toward the central axis direction of the cooling and dehumidifying tower 2, and the other end of each spray part 231 is respectively detachably connected to the cooling and dehumidifying tower 2. By setting the spray part 231 and the cooling and dehumidifying tower 2 as a detachable connection, it is convenient for maintenance or replacement during practical use. Specifically, a plurality of first flanges 28 are fixedly provided on the outer peripheral surface of the cooling and dehumidifying tower 2, and a second flange 2320 is fixedly provided at one end of the spray part 231 away from the central axis of the cooling and dehumidifying tower 2, and the first flange 28 and the second flange 2320 are fixedly connected by bolts, thereby realizing a detachable connection between the spray part 231 and the cooling and dehumidifying tower 2.

[0032] Each spraying part 231 includes a spray pipe 2311, a plurality of spray heads 2312, an air charging pipe 2313, a water supply assembly and an air supply assembly. The plurality of spray heads 2312 are connected and arranged on the spray pipe 2311, and are evenly arranged along the axial direction of the spray pipe 2311, so as to evenly spray the liquid in the spray pipe 2311 into the cooling and dehumidifying tower 2. The air charging pipe 2313 is arranged on one side of the spray pipe 2311, and is respectively connected to one side of the plurality of spray heads 2312 through a plurality of connecting pipes 2322, so as to charge the spray head 2312 with a gas of a preset pressure, so as to achieve a better atomization effect of the spraying, and at the same time, the flue gas can be further cooled by mixing the added gas with the flue gas.

[0033] The spraying part 231 further includes a fixing block 2321 (such as Figure 5 As shown in FIG. 2 ), the axial length of the fixing block 2321 is greater than or equal to the thickness of the side wall of the cooling and dehumidifying tower 2, and the fixing block 2321 abuts against the side wall of the cooling and spraying tower, so that the spraying part 231 is fixed more firmly to prevent the spraying part 231 from shaking. One end of the spraying pipe 2311 and the inflation pipe 2313 are fixedly inserted in the fixing block 2321, and extend through the fixing block 2321 in a direction away from the cooling and dehumidifying tower 2.

[0034] The water supply component and the air supply component are fixedly mounted on the outer wall of the cooling and dehumidifying tower 2, and are used to provide high-pressure water and air to the spray pipe 2311 and the inflation pipe 2313. The water supply component includes an annular water supply channel 2314, which is fixedly mounted on the outer wall of the cooling and dehumidifying tower 2. The water supply channel 2314 is respectively connected to the multiple spray pipes 2311 through multiple water pipe joints 2315. A liquid inlet 2316 is provided on one side of the water supply channel 2314 for connecting a water source that needs to be heated (such as a water source of a heating network or other preheated water source). The air supply component includes an annular air supply channel 2317, which is fixedly mounted on the outer wall of the cooling and dehumidifying tower 2. The air supply channel 2317 is connected to the multiple inflation pipes 2313 through multiple air pipe joints 2318. An inflation port 2319 is provided on one side of the air supply channel 2317 for receiving high-pressure air.

[0035] During implementation, the external water source is sprayed into the cooling and dehumidifying tower 2 through the water supply assembly, the spray pipe 2311 and the spray head 2312 in sequence, and the high-pressure gas enters the spray head 2312 after passing through the air supply channel 2317 and the gas charging pipe 2313 in sequence, so that the high-pressure air is mixed with the liquid in the spray head 2312. When the liquid and the high-pressure air are mixed in the spray head 2312, they form a gas-liquid two-phase mixture, and the bubbles expand under the negative pressure gradient, doing work on the liquid to increase its momentum. Therefore, the speed of the liquid at the outlet of the spray head 2312 will be greater than its speed at the inlet, thereby generating a thrust or injection effect. The ejected gas-liquid mixture often exists in the form of mist, thereby better absorbing the heat in the flue gas. At the same time, the high-speed ejected gas-liquid mixture will interfere with the direction of the flue gas flow, causing the flue gas to form turbulence under the spray part 231, thereby slowing down the circulation speed of the flue gas, so that the flue gas can be fully mixed with the gas-liquid mixture to cool down.

[0036] The above description is only a preferred embodiment of the present invention. Obviously, the described embodiment is only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A flue gas dehumidification and waste heat recovery and reuse system, characterized in that: include: A desulfurization tower (1), wherein a first air inlet (11) and a first air outlet (12) are respectively provided at the bottom and top of the desulfurization tower (1), wherein a desulfurization slurry spraying assembly (13) and a first heat exchanger (14) arranged below the desulfurization slurry spraying assembly (13) are provided inside the desulfurization tower (1); A cooling and dehumidifying tower (2), wherein a second air inlet (21) and a second air outlet (22) are respectively provided at the bottom and the top of the tower, wherein the second air inlet (21) is connected to the first air outlet (12), and a spray cooling component (23), a condenser (24) and a demister (25) are arranged in sequence from bottom to top between the second air inlet (21) and the second air outlet (22); A chimney (3) having a flue gas heat exchanger (33) fixedly disposed therein, wherein an input end of the flue gas heat exchanger (33) is used to receive flue gas discharged from the combustion furnace, and an output end of the flue gas heat exchanger (33) is in communication with the first air inlet (11); The waste heat recovery device (4) comprises a second heat exchanger (41) for dissipating heat from liquid in the condenser (24) and a pump body (42), wherein the pump body (42) sequentially pumps external water through pipelines to the second heat exchanger (41) and the first heat exchanger (14) for heat exchange.

2. The flue gas dehumidification and waste heat recovery and reuse system according to claim 1 is characterized in that: In the cooling and dehumidifying tower (2), cleaning nozzles (26) are respectively provided on the upper and lower sides of the condenser (24), and the output end of each cleaning nozzle (26) faces the condenser (24).

3. The flue gas dehumidification and waste heat recovery and reuse system according to claim 1 is characterized in that: There are a plurality of desulfurization slurry spraying assemblies (13), which are arranged at intervals along the axial direction of the desulfurization tower (1), and a filter layer (15) is provided below each of the desulfurization slurry spraying assemblies (13).

4. The flue gas dehumidification and waste heat recovery and reuse system according to claim 1 is characterized in that: The bottom ends of the desulfurization tower (1) and the cooling and dehumidification tower (2) are liquid storage layers (16), and a first circulation pump (17) is fixedly provided on one side of the desulfurization tower (1), wherein the input end of the first circulation pump (17) is connected to the liquid storage layer (16) of the desulfurization tower (1), and the output end of the first circulation pump (17) is connected to each of the slurry spraying assemblies; A second circulation pump (27) is fixedly arranged on one side of the cooling and dehumidifying tower (2); an input end of the second circulation pump (27) is connected to the liquid storage layer (16) of the cooling and dehumidifying tower (2); and an output end of the second circulation pump (27) is connected to the spray cooling component (23).

5. The flue gas dehumidification and waste heat recovery and reuse system according to claim 1 is characterized in that: The spray cooling component (23) comprises a plurality of spray parts (231), the plurality of spray parts (231) being evenly arranged along the outer circumference of the cooling and dehumidifying tower (2), one end of each of the spray parts (231) respectively passing through the side wall of the cooling and dehumidifying tower (2) and extending in the direction of the central axis of the cooling and dehumidifying tower (2), and the other end of each of the spray parts (231) respectively being detachably connected to the cooling and dehumidifying tower (2).

6. The flue gas dehumidification and waste heat recovery and reuse system according to claim 5 is characterized in that: Each of the spraying parts (231) comprises a spraying pipe (2311) and a plurality of spraying heads (2312) which are arranged in communication with the spraying pipe (2311); the plurality of spraying heads (2312) are evenly arranged along the axial direction of the spraying pipe (2311); an air filling pipe (2313) is provided on one side of the spraying pipe (2311); the air filling pipe (2313) is respectively connected to one side of the plurality of spraying heads (2312) through a plurality of connecting pipes (2322); a water supply component and an air supply component are fixedly provided on the outer side wall of the cooling and dehumidifying tower (2) for providing high-pressure water and air to the air filling pipe (2313) and the air filling pipe (2313).

7. The flue gas dehumidification and waste heat recovery and reuse system according to claim 6, characterized in that: The water supply component comprises an annular water supply channel (2314) fixedly sleeved on the outer wall of the cooling and dehumidifying tower (2); the water supply channel (2314) is connected to the plurality of spray pipes (2311) via a plurality of water pipe joints (2315); and a liquid inlet (2316) is provided on one side of the water supply channel (2314); The air supply component comprises an annular air supply channel (2317) fixedly mounted on the outer wall of the cooling and dehumidifying tower (2); the air supply channel (2317) is connected to the plurality of spray pipes (2311) via a plurality of air pipe joints (2318); and an air inlet is provided on one side of the air supply channel (2317).

8. The flue gas dehumidification and waste heat recovery and reuse system according to claim 6, characterized in that: A plurality of first flanges (28) are fixedly provided on the outer peripheral surface of the cooling and dehumidifying tower (2); a second flange (2320) is fixedly provided on one end of the spray portion (231) away from the central axis of the cooling and dehumidifying tower (2); and the first flange (28) and the second flange (2320) are fixedly connected by bolts.

9. The flue gas dehumidification and waste heat recovery and reuse system according to claim 8, characterized in that: The spray portion (231) further comprises a fixed block (2321) inserted on the second flange (2320), wherein the axial length of the fixed block (2321) is greater than or equal to the thickness of the side wall of the cooling and dehumidification tower (2), and one end of the spray pipe (2311) and the inflation pipe (2313) are fixedly inserted in the fixed block (2321) and extend through the fixed block (2321) in a direction away from the cooling and dehumidification tower (2).

10. The flue gas dehumidification and waste heat recovery and reuse system according to claim 1, characterized in that: There are a plurality of the spray cooling components (23), and the plurality of the spray cooling components (23) are arranged at intervals along the axial direction of the cooling and dehumidification tower (2).

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