Flue gas dust removal and desulfurization device

Abstract

The utility model discloses a flue gas dedusting and desulfurizing device which comprises a tank body, a rotational flow plate assembly, a rotary packing assembly and a fixed packing assembly are sequentially arranged in the tank body from bottom to top, a rotating shaft is rotatably arranged in the tank body, the rotational flow plate assembly and the rotary packing assembly are both fixedly connected to the rotating shaft, and the bottom end of the rotating shaft penetrates through the inside and the outside of the tank body. The side wall of the bottom of the tank body is communicated with an air inlet pipe, the top of the tank body is communicated with an exhaust pipe, a flow guide assembly is arranged between the rotational flow plate assembly and the rotary filler assembly, a first liquid distributor is arranged in the center of the rotary filler assembly, and a second liquid distributor is arranged above the fixed filler assembly. The first liquid distributor and the second liquid distributor are connected with the liquid storage tank through a circulating pipe, and a circulating pump is arranged on the circulating pipe. After the rotational flow plate assembly, the rotary filler assembly and the fixed filler assembly are arranged in the tank body for three-stage collaborative desulfurization, the desulfurization efficiency can be effectively improved, and the occupied area is reduced.

Description

Technical Field

[0001] This utility model relates to the field of industrial waste gas treatment technology, specifically to a flue gas dust removal and desulfurization device. Background Technology

[0002] In the sulfuric acid production process, the furnace gas generated by the fluidized bed roasting undergoes a series of cooling, dust removal, demisting, and drying processes. After passing through a "two-conversion, two-absorption" system to obtain 98% concentrated sulfuric acid, the tail gas is emitted. The tail gas contains a small amount of SO2 and particulate matter. To meet the environmental protection requirements for flue gas emissions, it is usually necessary to remove the particulate matter and SO2 from the flue gas. Dust removal and desulfurization steps are generally handled in separate tanks, which is quite wasteful of space. Existing flue gas desulfurization technologies mainly include two categories: wet desulfurization and dry desulfurization. Wet desulfurization technology is currently the most widely used desulfurization method. When using wet desulfurization, the flue gas often flows upward naturally in the desulfurization tower, while the alkaline solution is sprayed downward. To improve the dust removal and desulfurization effect, a packed bed is usually fixed inside the desulfurization tower. The packing material inside the packed bed disperses the flue gas, allowing the flue gas and alkaline solution to be evenly distributed in the packing gaps for contact mass transfer. However, using a fixed packed bed alone is prone to clogging, affecting the desulfurization efficiency. Utility Model Content

[0003] The main purpose of this utility model is to overcome the defects of the above-mentioned background technology and provide a flue gas dust removal and desulfurization device.

[0004] To achieve the above objectives, the present invention proposes a flue gas dust removal and desulfurization device, comprising a tank body. From bottom to top, the tank body is provided with a swirl plate assembly, a rotating packing assembly, and a fixed packing assembly. A rotating shaft is rotatably mounted inside the tank body. Both the swirl plate assembly and the rotating packing assembly are fixedly connected to the rotating shaft. The bottom end of the rotating shaft extends to the outside of the tank body. A rotating drive component is connected to the end of the rotating shaft located outside the tank body. An air inlet pipe is connected to the bottom side wall of the tank body, and an exhaust pipe is connected to the top of the tank body. A flow guide assembly is provided between the swirl plate assembly and the rotating packing assembly. A first liquid distributor is located at the center of the rotating packing assembly, and a second liquid distributor is located above the fixed packing assembly. The first liquid distributor and the second liquid distributor are connected to a liquid storage tank located at the bottom of the tank body and connected to the inside of the tank body via a circulation pipe. A circulation pump is mounted on the circulation pipe. Flue gas containing SO2 and dust enters the bottom of the tank through the inlet pipe and flows upwards, passing sequentially through a swirl plate assembly, a rotating packing assembly, and a fixed packing assembly, where it comes into contact with the desulfurization liquid for mass transfer. As the flue gas passes through the swirl plate assembly, particulate dust and some SO2 are initially removed. The flue gas then enters the rotating packing assembly axially, where it forms a cross-flow contact with the desulfurization liquid, effectively removing most of the SO2 and particulate dust. After being processed by the rotating packing assembly, the flue gas then enters the fixed packing assembly for further contact with the desulfurization liquid, extending the gas-liquid contact time and "replenishing" any escaped SO2, achieving deep desulfurization while reducing outlet mist entrainment. Through this three-stage synergistic desulfurization process within the tank, the SO2 outlet concentration is reduced to 15 mg / m³. 3 The overall desulfurization efficiency reaches 99.7%, effectively reducing the land area required.

[0005] A further optimized technical solution includes a swirl plate assembly comprising a central groove, an outer ring, and swirl blades. One end of each swirl blade is fixed to the outer circumference of the central groove, and the other end is fixed to the inner circumference of the outer ring. The sidewall of the central groove has several through holes, and a mounting hole is located at the center of the central groove, through which the rotating shaft passes. During the rotation of the swirl plate assembly, the desulfurization liquid in the central groove is thrown into the swirl blade channel along the through holes under centrifugal force, mixing with the flue gas and fully utilizing the desulfurization liquid for initial desulfurization.

[0006] A further optimized technical solution includes a rotating packing assembly comprising a lower support rod, an upper support rod, and several fan-shaped packing bodies. The lower support rod is horizontally fixed around the top of the rotating shaft. The upper support rod has a "7" shape, with one end fixed to the lower support rod. Several fan-shaped packing bodies are detachably installed between adjacent sets of lower and upper support rods. The centers of the fan-shaped packing bodies form a cylindrical cavity, and the first liquid distributor is disposed within this cylindrical cavity. The fan-shaped packing bodies are modularly installed between the lower and upper support rods, allowing for individual removal and replacement in case of damage, eliminating the need for complete replacement and facilitating maintenance.

[0007] A further optimized technical solution includes a first liquid distributor comprising a central distribution pipe and several first nozzles. The central distribution pipe is vertically disposed within the cylindrical cavity. One end of the circulation pipe is connected to the central distribution pipe, and the several first nozzles are horizontally connected to the central distribution pipe. After the desulfurization liquid enters the central distribution pipe from the circulation pipe, it is sprayed from the first nozzles to the inner edge of the fan-shaped packing body. Under centrifugal force, it enters the interior of the fan-shaped packing body and mixes with the flue gas in a cross-flow manner. The centrifugal force tears the desulfurization liquid into a nanoscale liquid film, greatly increasing the gas-liquid contact area and improving the desulfurization efficiency.

[0008] A further optimized technical solution includes an annular liquid collecting tank, a horn-shaped air inlet, and a liquid guiding pipe. The outer edge of the annular liquid collecting tank is fixed to the inner wall of the tank body. The large end of the horn-shaped air inlet is connected to the inner edge of the annular liquid collecting tank, and the small end of the horn-shaped air inlet corresponds to the bottom end of the fan-shaped packing body. One end of the liquid guiding pipe is connected to the bottom end of the annular liquid collecting tank, and the other end extends into the central groove. After passing through the swirl plate assembly, the flue gas is collected by the horn-shaped air inlet, preventing the flue gas from escaping without being processed by the rotating packing assembly. At the same time, the liquid after mass transfer by the rotating packing assembly is thrown to the inner wall of the tank body, flows along the inner wall into the annular liquid collecting tank, and is then guided by the liquid guiding pipe to the central groove of the swirl plate assembly for reuse.

[0009] A further optimized technical solution is provided, wherein the second liquid distributor includes several horizontally arranged dispensing pipes, each dispensing pipe is equipped with several second nozzles, and one end of each dispensing pipe is connected to the circulation pipe.

[0010] A further optimized technical solution also includes a demister plate, which is disposed above the second liquid distributor, and the outer edge of the demister plate is fixedly connected to the inner wall of the tank.

[0011] A further optimized technical solution is that the bottom of the tank is equipped with several sets of agitators.

[0012] A further optimized technical solution is that the bottom of the tank is connected to several air blowing pipes, and the air blowing pipes correspond to the position of the agitator.

[0013] A further optimized technical solution includes an overflow plate at the location where the tank body connects to the liquid storage tank, and a drain pipe connected to the bottom of the tank body.

[0014] The beneficial effects of this invention include: by driving the swirl plate assembly and the rotating packing assembly to rotate synchronously through a rotating drive component, the flue gas enters the tank and sequentially passes through the swirl plate assembly, the rotating packing assembly, and the fixed packing assembly, where it contacts the desulfurization liquid for mass transfer. After three-stage synergistic desulfurization in one tank, the SO2 outlet concentration is reduced to 15 mg / m³. 3 The overall desulfurization efficiency reaches 99.7%. When the flue gas passes through the cyclone assembly, strong turbulence is generated within the rotating cyclone assembly, cutting through the gas and liquid phases and initially removing particulate dust and some SO2 from the flue gas. The liquid-gas contact area generated by the active rotation of the cyclone assembly is 3-5 times larger than that of the traditional fixed cyclone assembly, which can significantly improve the dust removal and desulfurization effect. The flue gas enters the rotating packing assembly axially and forms a cross-flow contact with the desulfurization liquid within the rotating packing assembly, which can increase the gas-liquid contact area and effectively remove most of the SO2 and particulate dust from the flue gas. After being treated by the rotating packing assembly, the flue gas enters the fixed packing assembly and contacts the new desulfurization liquid for mass transfer, prolonging the gas-liquid contact time and "replenishing" the escaped SO2, achieving deep desulfurization, while reducing outlet mist entrainment, effectively desulfurizing while reducing the footprint. Attached Figure Description

[0015] Figure 1 This is an overall schematic diagram of the flue gas dust removal and desulfurization device in the embodiment of this utility model.

[0016] Figure 2 This is a schematic diagram of the tank after being cut in the embodiment of this utility model.

[0017] Figure 3 This is an installation diagram of the swirl plate assembly, rotating packing assembly, fixed packing assembly, and flow guiding assembly in an embodiment of this utility model.

[0018] Figure 4 This is a schematic diagram of the swirl plate assembly in an embodiment of this utility model.

[0019] Figure 5 This is a schematic diagram of the installation of the rotating packing assembly in an embodiment of this utility model.

[0020] Figure 6 This is a schematic diagram of the lower support rod and the upper support rod in an embodiment of this utility model.

[0021] Figure 7 This is a schematic diagram of the flow guiding component in an embodiment of this utility model.

[0022] Reference numerals: 1 Tank body; 2 Swirl plate assembly; 201 Central groove; 202 Outer ring; 203 Swirl blades; 204 Through hole; 205 Mounting hole; 3 Rotary packing assembly; 301 Lower support rod; 302 Upper support rod; 303 Fan-shaped packing body; 304 Cylindrical cavity; 4 Fixed packing assembly; 5 Rotating shaft; 6 Rotary drive component; 7 Air inlet pipe; 8 Exhaust pipe; 9 Guide assembly; 901 Annular liquid collection tank; 902 Horn-shaped air inlet; 903 Liquid guide pipe; 10 First liquid distributor; 1001 Central distribution pipe; 1002 First nozzle; 11 Second liquid distributor; 1101 Liquid distribution pipe; 1102 Second nozzle; 12 Circulation pipe; 13 Storage tank; 14 Circulation pump; 15 Demisting plate; 16 Agitator; 17 Air blowing pipe; 18 Overflow plate; 19 Sewage pipe; 20 Valve; 21 Inspection port. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects of the embodiments of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be for both fixing and circuit connection purposes.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] Please see Figures 1 to 7In one embodiment, a flue gas dust removal and desulfurization device is disclosed, comprising a tank 1. Inside the tank 1, from bottom to top, are arranged a swirl plate assembly 2, a rotating packing assembly 3, and a fixed packing assembly 4. A vertically rotatable rotating shaft 5 is installed inside the tank 1. The swirl plate assembly 2 and the rotating packing assembly 3 are coaxially and fixedly connected to the rotating shaft 5. The bottom end of the rotating shaft 5 extends to the outside of the tank 1. A rotating drive component 6, which is an electric motor or hydraulic motor, is connected to the end of the rotating shaft 5 located outside the tank 1. The rotating drive component 6 drives the rotating shaft 5 to rotate, thereby causing the swirl plate assembly 2 and the rotating packing assembly 3 to rotate synchronously. An air inlet pipe 7 is connected to the bottom side wall of the tank 1, and the air inlet pipe 7 is connected to the tail gas port of the absorption tower in the sulfuric acid production process, used to introduce the tail gas from the absorption tower into the tank 1 for treatment. An exhaust pipe 8 is connected to the top of the tank 1, used to exhaust the treated tail gas from the tank 1 to the outside of the tank 1. A flow guiding component 9 is provided between the plate assembly 2 and the rotating packing assembly 3. The flow guiding component 9 is used to guide the flue gas after being treated by the swirl plate assembly 2 into the rotating packing assembly 3, and to collect and guide the desulfurization liquid after the flue gas is treated by the rotating packing assembly 3 back to the swirl plate assembly 2 for use. A first liquid distributor 10 is provided at the center of the rotating packing assembly 3, and a second liquid distributor 11 is provided above the fixed packing assembly 4. The first liquid distributor 10 and the second liquid distributor 11 are connected to the liquid storage tank 13, which is located at the bottom of the tank body 1 and communicates with the inside of the tank body 1, through a circulation pipe 12. A circulation pump 14 is provided on the circulation pipe 12. Specifically, valves 20 are provided on the branches of the circulation pipe 12 that connect the first liquid distributor 10 and the second liquid distributor 11, respectively, to control the entry of the desulfurization liquid into the first liquid distributor 10 and / or the second liquid distributor 11. An inspection port 21 is also provided on the tank body 1 for operators to enter the inside of the tank body 1.In this embodiment, the rotating shaft 5 is driven to rotate by the rotating drive component 6. The rotating shaft 5 drives the swirl plate assembly 2 and the rotating packing assembly 3 to rotate synchronously. At the same time, the circulating pump 14 draws alkaline desulfurization liquid from the storage tank 13 and sprays it onto the inner edge of the rotating packing assembly 3 and the top of the fixed packing assembly 4 through the circulating pipe 12, the first liquid distributor 10 and the second liquid distributor 11, respectively. Flue gas containing SO2 and dust enters the bottom of the tank 1 through the inlet pipe 7 and passes upward through the swirl plate assembly 2, the rotating packing assembly 3 and the fixed packing assembly 4 in sequence to contact the desulfurization liquid for mass transfer. When the flue gas passes through the swirl plate assembly 2, the rotating swirl plate assembly 2 generates strong turbulence to cut the gas and liquid phases, initially removing particulate dust and some SO2 from the flue gas. The liquid-gas contact area generated by the active rotation of the swirl plate assembly 2 is larger than that of the traditional fixed type. The swirl plate is enlarged by 3-5 times, which can significantly improve the dust removal and desulfurization effect. After the flue gas is treated by the swirl plate assembly 2, it generates an upward spiral airflow. The spiral airflow enters the rotating packing assembly 3 axially and forms a cross-flow contact with the new desulfurization liquid in the rotating packing assembly 3, which greatly increases the gas-liquid contact area and avoids the "end effect" in counter-current or parallel flow. Most of the SO2 and particulate dust in the flue gas are effectively removed here. After the flue gas is treated by the rotating packing assembly 3, it enters the fixed packing assembly 4 to contact the new desulfurization liquid for mass transfer, prolonging the gas-liquid contact time, "replenishing" the escaped SO2, realizing deep desulfurization, and reducing the entrainment of outlet mist and reducing the risk of blockage of the fixed packing assembly 4. After the three-stage synergistic desulfurization in one tank 1, the SO2 outlet concentration is reduced to 15mg / m³. 3 The overall desulfurization efficiency reaches 99.7%, effectively reducing the footprint and improving desulfurization efficiency.

[0028] In a specific example, the swirl plate assembly 2 includes a central groove 201, an outer ring 202, and swirl blades 203. One end of the swirl blades 203 is fixed to the outer circumference of the central groove 201, and the other end of the swirl blades 203 is fixed to the inner circumference of the outer ring 202. The side wall of the central groove 201 has several through holes 204, and the center of the central groove 201 has a mounting hole 205 through which the rotating shaft 5 passes. The desulfurization liquid thrown out by the rotating packing assembly 3 flows down the tank wall and is collected by the flow guiding assembly 9 and guided into the central groove 201. During the rotation of the swirl plate assembly 2, the desulfurization liquid in the central groove 201 is thrown into the channel of the swirl blades 203 along the through holes 204 under the action of centrifugal force and mixes with the flue gas, making full use of the desulfurization liquid for preliminary removal.

[0029] In a specific example, the rotating packing assembly 3 includes a lower support rod 301, an upper support rod 302, and several fan-shaped packing bodies 303. The lower support rod 301 is horizontally fixed around the top of the rotating shaft 5. The upper support rod 302 has a "7" shaped structure, and one end of the upper support rod 302 is fixed to the lower support rod 301. Several fan-shaped packing bodies 303 are detachably installed between two adjacent sets of lower support rods 301 and upper support rods 302. The center of the fan-shaped packing bodies 303 forms a cylindrical cavity 304, and the first liquid distributor 10 is disposed in the cylindrical cavity 304. The fan-shaped packing body 303 is modularly installed between the lower support rod 301 and the upper support rod 302. When damaged, it can be disassembled and replaced individually without replacing the whole body. The first liquid distributor 10 includes a central distribution pipe 1001 and several first nozzles 1002. The central distribution pipe 1001 is vertically installed in the cylindrical cavity 304. One end of the circulation pipe 12 is connected to the central distribution pipe 1001. Several first nozzles 1002 are horizontally connected to the central distribution pipe 1001. After the desulfurization liquid enters the central distribution pipe 1001 from the circulation pipe 12, it is sprayed from the first nozzles 1002 to the inner edge of the fan-shaped packing body 303. Under centrifugal force, it enters the inside of the fan-shaped packing body 303 and mixes with the flue gas in a cross-flow contact. The centrifugal force tears the desulfurization liquid (such as NaOH or limestone slurry) into a nanoscale liquid film, which greatly increases the gas-liquid contact area and improves the desulfurization efficiency.

[0030] In a specific example, the flow guiding component 9 includes an annular liquid collecting tank 901, a horn-shaped air inlet 902, and a liquid guiding pipe 903. The outer edge of the annular liquid collecting tank 901 is fixed to the inner wall of the tank body 1. The large end of the horn-shaped air inlet 902 is connected to the inner edge of the annular liquid collecting tank 901, and the small end of the horn-shaped air inlet 902 corresponds to the bottom end of the fan-shaped packing body 303. One end of the liquid guiding pipe 903 is connected to the bottom end of the annular liquid collecting tank 901, and the other end of the liquid guiding pipe 903 extends into the central groove 201. After passing through the swirl plate assembly 2, the flue gas is gathered by the horn-shaped air inlet 902 to the bottom of the packing bed composed of several fan-shaped packing bodies 303, and enters the interior of the packing bed axially to prevent the flue gas from escaping without being processed by the rotating packing assembly 3. At the same time, the liquid after mass transfer by the rotating packing assembly 3 is thrown to the inner wall of the tank 1 and flows along the inner wall into the annular liquid collection tank 901, and then is guided through the liquid guide pipe 903 to the central groove 201 of the swirl plate assembly 2.

[0031] In a specific example, the second liquid distributor 11 includes several horizontally arranged distribution pipes 1101, each with several second nozzles 1102. One end of each distribution pipe 1101 is connected to a circulation pipe 12. Specifically, the distribution pipes 1101 are evenly distributed above the fixed packing assembly 4, and all the distribution pipes 1101 are fixedly connected together at one end. The desulfurization liquid enters the distribution pipes 1101 through the circulation pipe 12 and is then sprayed onto the fixed packing assembly 4 along the second nozzles 1102.

[0032] The disclosed flue gas dust removal and desulfurization device also includes a demister plate 15, which is set above the second liquid distributor 11. The outer edge of the demister plate 15 is fixedly connected to the inner wall of the tank 1. The demister plate 15 adopts a baffle plate type demister. After the flue gas passes through the three-stage desulfurization, it enters the demister plate 15 for demisting. The demisted flue gas then exits from the exhaust pipe 8 to prevent mist entrainment and excessive emissions.

[0033] In a specific example, several sets of agitators 16 are provided at the bottom of the tank 1. An overflow plate 18 is provided at the position where the tank 1 connects to the storage tank 13. A drain pipe 19 is connected to the bottom of the tank 1. Several air blowing pipes 17 are connected to the bottom of the tank 1. The positions of the air blowing pipes 17 and the agitators 16 are corresponding. One end of the air blowing pipe 17 is connected to an external fan. By periodically starting the agitators 16, the desulfurization liquid at the bottom of the tank 1 is stirred. When the agitators 16 are stirring the desulfurization liquid (limestone slurry), the air blowing pipes 17 blow out gas, which oxidizes calcium sulfite into gypsum. Under the obstruction of the overflow plate 18, a sedimentation zone will be formed at the bottom of the tank 1, so that the dust and gypsum carried in the alkaline solution can settle and be discharged from the drain pipe 19. The alkaline solution on the surface will pass over the overflow plate 18 and enter the storage tank 13 for circulation. Through forced mixing and oxidation, the pH value uniformity in the tank 1 is maintained, ensuring the uniformity of the desulfurization reaction.

[0034] The background section of this utility model may include background information about the problems or environment of this utility model, and is not necessarily a description of the prior art. Therefore, the content included in the background section does not constitute an admission of the prior art by the applicant.

[0035] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described specific features, structures, materials, or characteristics can be combined in a suitable manner in any one or more embodiments or examples. Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope of protection of the patent application.

Claims

1. A flue gas dust removal and desulfurization device, characterized in that: The device includes a tank body, inside which, from bottom to top, are arranged a swirl plate assembly, a rotating packing assembly, and a fixed packing assembly. A rotating shaft is rotatably mounted inside the tank body. Both the swirl plate assembly and the rotating packing assembly are fixedly connected to the rotating shaft. The bottom end of the rotating shaft extends to the outside of the tank body. A rotating drive component is connected to the end of the rotating shaft located outside the tank body. An air inlet pipe is connected to the bottom side wall of the tank body, and an exhaust pipe is connected to the top of the tank body. A flow guide assembly is provided between the swirl plate assembly and the rotating packing assembly. A first liquid distributor is located at the center of the rotating packing assembly, and a second liquid distributor is located above the fixed packing assembly. The first and second liquid distributors are connected to a storage tank located at the bottom of the tank body and connected to the inside of the tank body via a circulation pipe. A circulation pump is mounted on the circulation pipe.

2. The flue gas dedusting and desulfurizing device according to claim 1, characterized in that: The swirl plate assembly includes a central groove, an outer ring, and swirl blades. One end of the swirl blades is fixed to the outer circumference of the central groove, and the other end of the swirl blades is fixed to the inner circumference of the outer ring. The sidewall of the central groove has several through holes, and the center of the central groove has a mounting hole through which the rotating shaft passes.

3. The flue gas dedusting and desulfurizing device according to claim 2, characterized in that: The rotating packing assembly includes a lower support rod, an upper support rod, and several fan-shaped packing bodies. The lower support rod is horizontally fixed around the top of the rotating shaft. The upper support rod has a "7" shaped structure, and one end of the upper support rod is fixed to the lower support rod. Several fan-shaped packing bodies are detachably installed between two adjacent sets of lower and upper support rods. The center of each fan-shaped packing body forms a cylindrical cavity, and the first liquid distributor is disposed within the cylindrical cavity.

4. The flue gas dedusting and desulfurizing device according to claim 3, characterized in that: The first liquid distributor includes a central distribution pipe and a plurality of first nozzles. The central distribution pipe is vertically disposed in the cylindrical cavity. One end of the circulation pipe is connected to the central distribution pipe, and the plurality of first nozzles are horizontally connected to the central distribution pipe.

5. The flue gas dedusting and desulfurizing device according to claim 4, characterized in that: The flow guiding assembly includes an annular liquid collecting tank, a horn-shaped air inlet, and a liquid guiding pipe. The outer edge of the annular liquid collecting tank is fixed to the inner wall of the tank body. The large end of the horn-shaped air inlet is connected to the inner edge of the annular liquid collecting tank, and the small end of the horn-shaped air inlet corresponds to the bottom end of the fan-shaped packing body. One end of the liquid guiding pipe is connected to the bottom end of the annular liquid collecting tank, and the other end of the liquid guiding pipe extends into the central tank.

6. The flue gas dedusting and desulfurizing device according to claim 5, characterized in that: The second liquid distributor includes several horizontally arranged dispensing pipes, each dispensing pipe being equipped with several second nozzles, and one end of each dispensing pipe being connected to the circulation pipe.

7. The flue gas dedusting and desulfurizing device according to any one of claims 1 to 6, characterized in that: It also includes a demister plate, which is disposed above the second liquid distributor, and the outer edge of the demister plate is fixedly connected to the inner wall of the tank.

8. The flue gas dedusting and desulfurizing device according to claim 7, characterized in that: The bottom of the tank is equipped with several sets of agitators.

9. The flue gas dedusting and desulfurizing device according to claim 8, characterized in that: The bottom of the tank is connected to several air blowing pipes, which correspond to the position of the agitator.

10. The flue gas dedusting and desulfurizing device according to claim 9, characterized in that: An overflow plate is provided at the position where the tank body connects to the liquid storage tank, and a drain pipe is connected to the bottom of the tank body.

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