Industrial smelting furnace flue gas desulfurization and denitrification device and implementation method thereof

Abstract

The application discloses an industrial mineral heat furnace flue gas desulfurization and denitrification device and an implementation method thereof, and relates to the technical field of industrial mineral heat furnaces. The industrial mineral heat furnace flue gas desulfurization and denitrification device comprises a treatment tank body, the inside of the treatment tank body is provided with a partition plate, the partition plate is movably connected with a stirring assembly, the lower end of the treatment tank body is fixedly connected with a liquid outlet box, and a limiting sliding groove is annularly arranged on the inner wall of the end, connected with the liquid outlet box, of the treatment tank body. The industrial mineral heat furnace flue gas desulfurization and denitrification device and the implementation method thereof are characterized in that the bottom of the treatment tank body is provided with a gas outlet assembly, a plurality of gas distribution rotary discs are arranged, dispersed flue gas enters the treatment tank body, the gas distribution rotary disc rotates while moving in the position under the driving of the moving sliding block and the rotating triangular plate, the dispersion degree of the flue gas is further improved, the flue gas and the alkali liquor are uniformly mixed, and the purification effect of the flue gas is improved.

Description

Technical Field

[0001] This invention relates to the field of industrial submerged arc furnace technology, and in particular to a desulfurization and denitrification device for flue gas from an industrial submerged arc furnace and its implementation method. Background Technology

[0002] The smelting process of electric arc furnaces generates a large amount of flue gas, which is a mixture of gases and dust. It is the main cause of air pollution in residential areas. The composition of flue gas is very complex. The gases include water vapor, sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbons and nitrogen oxides, etc. The dust includes fuel ash, coal particles, oil droplets and high-temperature pyrolysis products, etc. Therefore, the pollution of the environment by flue gas is a complex pollution of multiple toxic substances.

[0003] Chinese Patent CN217698649U discloses a dust removal, desulfurization, and denitrification device for flue gas from an electric arc furnace, belonging to the field of electric arc furnace technology. The key technical features include a base, a processing tank fixedly connected to the top of the base, a mixing component on the top of the processing tank, a dust removal component on one side of the processing tank, and a liquid addition component on the top of the base. The mixing component includes a motor, a rotating rod, a first stirring rod, a second stirring rod, and a baffle plate. This invention aims to solve the problems of existing electric arc furnace flue gas desulfurization and denitrification devices being unable to completely eliminate fine solid particles contained in the flue gas, and the generally high investment and operating costs of existing desulfurization and denitrification devices.

[0004] While this patent addresses to some extent the technical problem of existing flue gas desulfurization and denitrification devices for submerged arc furnaces failing to completely eliminate fine solid particles in the flue gas, the fixed flue gas inlet position below the treatment tank, especially along the side wall of the treatment tank, means that during operation, the flue gas moves straight upward under buoyancy after entering the treatment tank. The second stirring rod is ineffective in mixing the flue gas and slurry, and most of the flue gas moves upward along the side wall of the treatment tank, failing to achieve a stirring effect. Summary of the Invention

[0005] The purpose of this invention is to provide an industrial submerged arc furnace flue gas desulfurization and denitrification device and its implementation method. An air outlet component is provided at the bottom of the treatment tank body, and multiple air distribution turntables are provided to disperse the flue gas into the treatment tank body. Simultaneously, driven by a moving slider and a rotating triangular plate, the air distribution turntable rotates as it moves, further improving the dispersion of the flue gas and achieving uniform mixing of the flue gas and alkaline solution, thereby improving the purification effect of the flue gas and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an industrial submerged arc furnace flue gas desulfurization and denitrification device, comprising a treatment tank body, wherein a partition plate is provided inside the treatment tank body, a stirring assembly is movably connected to the partition plate, a liquid outlet tank is fixedly connected to the lower end of the treatment tank body, and a limiting groove is formed in an annular shape on the inner wall of the end of the treatment tank body connected to the liquid outlet tank, and an air outlet assembly is movably connected in the limiting groove.

[0007] The air outlet assembly includes a main air outlet, an elastic pipe, a movable slider, a support spring, and an air distribution turntable. The output end of the main air outlet is provided with an annularly distributed elastic pipe, which is connected to the movable slider. The upper end of the movable slider is movably connected to the air distribution turntable. The movable slider is movably connected to the limiting slide groove. A support spring is fixedly connected to one side of the movable slider, and one end of the support spring is fixedly connected to one end of the limiting slide groove.

[0008] Preferably, the movable slider has a buffer groove inside, which is connected to an elastic pipe, and a limit ring is provided at the upper end of the movable slider, which is movably connected to the air distribution turntable.

[0009] Preferably, the lower surface of the air distribution turntable is provided with a rotating groove that matches the limiting retaining ring. The rotating groove is movably connected to the limiting retaining ring. An exhaust hole is opened at the position corresponding to the buffer groove on the air distribution turntable. A first external retaining tooth is provided on the side wall of the air distribution turntable.

[0010] Preferably, the exhaust holes are distributed in concentric circles, and the exhaust holes are inclined, with the inclination angle of the exhaust holes on the outer circle being greater than that of the exhaust holes on the inner circle.

[0011] Preferably, the main air outlet is provided with an air inlet pipe, one end of which extends to the outside of the liquid outlet tank and connects to the flue gas discharge pipe.

[0012] Preferably, the stirring assembly includes a drive motor, a stirring shaft, spiral stirring blades, plate-shaped stirring blades, and a rotating triangular plate. The drive motor is installed at the upper end of the processing tank body, and the output end of the drive motor passes through the processing tank body and is fixedly connected to the stirring shaft. The stirring shaft is movably connected to the partition plate through a bearing. The spiral stirring blades are arranged at the position of the stirring shaft above the partition plate, and the plate-shaped stirring blades are arranged at the position of the stirring shaft below the partition plate. The rotating triangular plate is fixedly connected to the lower end of the stirring shaft.

[0013] Preferably, the plate-shaped stirring blade has guide holes, and the inclination angles of adjacent guide holes are opposite.

[0014] Preferably, the outer wall of the rotating triangular plate is provided with a second outer locking tooth, which meshes with the first outer locking tooth.

[0015] Preferably, the limiting groove is provided with a drain hole, which is connected to the liquid outlet tank.

[0016] Another technical problem to be solved by the present invention is to provide a method for implementing an industrial submerged arc furnace flue gas desulfurization and denitrification device, comprising the following steps:

[0017] S1: Inject alkaline solution into the treatment tank body. The height of the alkaline solution shall not exceed the height of the partition plate. Activated carbon adsorption particles shall be loaded into the treatment tank body above the partition plate. Waste gas shall be introduced into the treatment tank body through the gas outlet component and the stirring component shall be turned on.

[0018] S2: The flue gas after dust removal enters the main outlet through the inlet pipe. The gas is evenly distributed through the main outlet and enters the flexible pipe. The flexible pipe passes the flue gas into the buffer tank. Then, the gas distribution disc mixes the flue gas with the alkaline solution to fully react and purify the flue gas.

[0019] S3: The stirring shaft drives the rotating triangular plate to rotate, the moving slider moves back and forth in the limit groove, and the air distribution turntable rotates while moving to adjust the air outlet position.

[0020] S4: The plate-type stirring blades rotate, driving the alkaline solution in the treatment tank to stir and continuously mix the alkaline solution and flue gas. At the same time, the plate-type stirring blades break up large flue gas bubbles. The purified flue gas passes through the pores on the partition plate and comes into contact with the activated carbon adsorption particles.

[0021] S5: The activated carbon adsorption particles undergo secondary adsorption and purification. The spiral stirring blades rotate to stir the activated carbon adsorption particles up and down. The gas purified by adsorption is discharged from the top of the treatment tank.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The present invention has an air outlet component at the bottom of the treatment tank body and multiple air distribution turntables, which disperse the flue gas into the treatment tank body. At the same time, the air distribution turntable rotates while moving in position, driven by the moving slider and the rotating triangle plate, which further improves the dispersion of flue gas, realizes uniform mixing of flue gas and alkaline solution, and improves the purification effect of flue gas.

[0024] 2. The drive motor of this invention drives the stirring shaft to rotate, and the stirring shaft simultaneously drives the spiral stirring blade, the plate stirring blade and the rotating triangular plate to rotate. The rotation of the spiral stirring blade stirs the activated carbon adsorption particles in the upper section up and down, changing the vertical position of the activated carbon adsorption particles and improving the adsorption effect of activated carbon. When the plate stirring blade rotates and stirs, the alkaline liquid overflowing from the adjacent guide hole can converge and collide, improving the mixing effect of alkaline liquid and flue gas. The rotating triangular plate rotates continuously, and the moving slider moves back and forth in the limiting groove, constantly changing the position of the gas distribution turntable. All three are driven by the same drive, which is easy to control.

[0025] 3. In this invention, the drain hole is set in the limiting slide groove, located at the lowest point of the treatment tank body. Impurities contained in the discharged alkaline solution are easily deposited here. The reciprocating sliding block can push the deposited impurities into the drain hole for discharge, thus achieving continuous desulfurization and denitrification. Attached Figure Description

[0026] Figure 1 This is an overall structural diagram of the present invention;

[0027] Figure 2 This is a diagram showing the internal structure of the processing tank body of the present invention;

[0028] Figure 3 This is a structural diagram of the stirring assembly of the present invention;

[0029] Figure 4 This is a structural diagram of the processing tank body of the present invention;

[0030] Figure 5 For the present invention Figure 4 Exploded view;

[0031] Figure 6 This is a structural diagram of the air outlet assembly of the present invention;

[0032] Figure 7 This is an enlarged view of point A in the present invention.

[0033] In the diagram: 1. Processing tank body; 11. Divider plate; 12. Limiting groove; 121. Drain hole; 2. Stirring assembly; 21. Drive motor; 22. Stirring shaft; 23. Spiral stirring blade; 24. Plate-shaped stirring blade; 241. Guide hole; 25. Rotating triangle plate; 251. Second outer retaining tooth; 3. Liquid outlet tank; 4. Gas outlet assembly; 41. Main gas outlet; 411. Gas inlet pipe; 42. Elastic pipe; 43. Moving slider; 431. Buffer groove; 432. Limiting retaining ring; 44. Support spring; 45. Gas distribution turntable; 451. Exhaust hole; 452. First outer retaining tooth. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1-4A desulfurization and denitrification device for flue gas from an industrial submerged arc furnace includes a treatment tank body 1. A partition plate 11 is provided inside the treatment tank body 1. A stirring assembly 2 is movably connected to the partition plate 11. A liquid outlet tank 3 is fixedly connected to the lower end of the treatment tank body 1. A limiting groove 12 is formed in an annular shape on the inner wall of the end where the treatment tank body 1 is connected to the liquid outlet tank 3. An air outlet assembly 4 is movably connected in the limiting groove 12. A drain hole 121 is provided in the limiting groove 12 and communicates with the liquid outlet tank 3.

[0036] Specifically, an inlet pipe is provided on the side wall of the lower section of the treatment tank body 1. Liquid is introduced into the treatment tank body 1 through the inlet pipe. After mixing and reacting with the flue gas inside the treatment tank body 1, the reacted alkaline solution is discharged into the outlet tank 3 through the drain hole 121. A discharge pipe is provided on one side of the outlet tank 3. The drain hole 121 is set in the limiting slide groove 12, located at the lowest point of the treatment tank body 1. Impurities contained in the discharged alkaline solution are easily deposited here. The reciprocating sliding block 43 can push the deposited impurities into the drain hole 121 for discharge.

[0037] Please see Figures 2-3 The stirring assembly 2 includes a drive motor 21, a stirring shaft 22, a spiral stirring blade 23, a plate-shaped stirring blade 24, and a rotating triangular plate 25. The drive motor 21 is installed at the upper end of the processing tank body 1, and the output end of the drive motor 21 passes through the processing tank body 1 and is fixedly connected to the stirring shaft 22. The stirring shaft 22 is movably connected to the partition plate 11 through a bearing. The spiral stirring blade 23 is provided on the stirring shaft 22 above the partition plate 11, and the plate-shaped stirring blade 24 is provided on the stirring shaft 22 below the partition plate 11. The rotating triangular plate 25 is fixedly connected to the lower end of the stirring shaft 22.

[0038] Specifically, the drive motor 21 drives the stirring shaft 22 to rotate, and the stirring shaft 22 simultaneously drives the spiral stirring blade 23 and the plate stirring blade 24 to rotate. The partition plate 11 divides the treatment tank body 1 into upper and lower sections. Activated carbon adsorption particles are set in the upper section of the treatment tank body 1, and alkaline solution is injected into the lower section of the treatment tank body 1. The spiral stirring blade 23 rotates to stir the activated carbon adsorption particles in the upper section, changing the vertical position of the activated carbon adsorption particles and moving the activated carbon adsorption particles with more impurities at the bottom upwards, thereby improving the adsorption effect of the activated carbon adsorption particles. The plate stirring blade 24 rotates to stir the alkaline solution in the lower section of the treatment tank body 1, continuously mixing the alkaline solution and flue gas.

[0039] The plate-shaped stirring blade 24 has guide holes 241, and the inclination angles of adjacent guide holes 241 are opposite.

[0040] Specifically, when the plate-shaped stirring blade 24 rotates and agitates, the guide hole 241 directs the alkaline solution in different directions, and the alkaline solution overflowing from adjacent guide holes 241 can converge and collide to mix.

[0041] The outer wall of the rotating triangular plate 25 is provided with a second outer locking tooth 251, which meshes with the first outer locking tooth 452.

[0042] Specifically, when the rotating triangle 25 rotates, the protruding position of the rotating triangle 25 pushes the air distribution turntable 45 to change position. Correspondingly, the movable slider 43 moves within the limiting groove 12. When the rotating triangle 25 moves to the recessed position and contacts the air distribution turntable 45, the support spring 44 pushes the movable slider 43 to reset. As the rotating triangle 25 continues to rotate, the movable slider 43 moves back and forth within the limiting groove 12, continuously changing the position of the air distribution turntable 45. At the same time, the second outer locking tooth 251 pushes the first outer locking tooth 452 to rotate. The air distribution turntable 45 rotates while moving, changing the position of the exhaust hole 451 on the air distribution turntable 45, thereby changing the outlet direction of the flue gas, reducing flue gas accumulation, and improving the mixing effect of flue gas and alkali solution.

[0043] Please see Figures 4-7 The air outlet assembly 4 includes a main air outlet 41, an elastic pipe 42, a movable slider 43, a support spring 44, and an air distribution turntable 45. The output end of the main air outlet 41 is provided with an annularly distributed elastic pipe 42, which is connected to the movable slider 43. The upper end of the movable slider 43 is movably connected to the air distribution turntable 45. The movable slider 43 is movably connected to the limiting slide groove 12. A support spring 44 is fixedly connected to one side of the movable slider 43, and one end of the support spring 44 is fixedly connected to one end of the limiting slide groove 12.

[0044] The movable slider 43 has a buffer groove 431 inside, which is connected to the elastic pipe 42. The upper end of the movable slider 43 is provided with a limit ring 432, which is movably connected to the air distribution turntable 45.

[0045] Specifically, the flexible pipe 42 introduces the flue gas into the buffer tank 431, and the flue gas in the buffer tank 431 is discharged into the treatment tank body 1 through the gas distribution turntable 45, where it mixes and reacts with the alkaline solution in the treatment tank body 1.

[0046] The lower surface of the air distribution turntable 45 is provided with a rotating groove that matches the limiting ring 432. The rotating groove is movably connected to the limiting ring 432. An exhaust hole 451 is opened at the position corresponding to the buffer groove 431 on the air distribution turntable 45. A first external locking tooth 452 is provided on the side wall of the air distribution turntable 45.

[0047] Specifically, the flue gas in the buffer tank 431 is evenly discharged through the exhaust port 451, and can mix and react with the alkaline solution in the treatment tank body 1. The gas distribution turntable 45 rotates on the limiting ring 432 through the first outer locking tooth 452, continuously changing the position of the exhaust port 451, so that the flue gas distribution is more uniform.

[0048] The exhaust holes 451 are distributed in concentric circles, and the exhaust holes 451 are inclined. The inclination angle of the exhaust holes 451 on the outer circle is greater than that of the exhaust holes 451 on the inner circle.

[0049] Specifically, when the flue gas passes through the exhaust port 451, the exhaust port 451 guides the flue gas, causing the flue gas to move into the treatment tank body 1 in a diffused manner. The exhaust port 451 is used to disperse the flue gas and improve the mixing effect of the flue gas and the alkaline solution.

[0050] The main air outlet 41 is equipped with an air inlet pipe 411 at the air inlet end. One end of the air inlet pipe 411 extends to the outside of the liquid outlet tank 3 and is connected to the flue gas discharge pipe.

[0051] Specifically, a flue gas dust removal device is connected to the air inlet pipe 411. The flue gas that has been dusted enters the main air outlet 41 through the air inlet pipe 411 and then enters the flexible pipe 42 through the main air outlet 41.

[0052] To better illustrate the implementation process of an industrial submerged arc furnace flue gas desulfurization and denitrification device, this embodiment presents an implementation method for such a device, including the following steps:

[0053] Step 1: Inject alkaline solution into the treatment tank body 1. The height of the alkaline solution shall not exceed the height of the partition plate 11. Activated carbon adsorption particles shall be loaded into the treatment tank body 1 above the partition plate 11. Waste gas shall be introduced into the treatment tank body 1 through the gas outlet component 4. The stirring component 2 shall be turned on.

[0054] Step 2: The flue gas after dust removal enters the main outlet 41 through the inlet pipe 411. The gas is evenly distributed through the main outlet 41 and enters the flexible pipe 42. The flexible pipe 42 passes the flue gas into the buffer tank 431. Then, the gas distribution disc 45 mixes the flue gas with the alkaline solution to fully react and purify the flue gas.

[0055] Step 3: The stirring shaft 22 drives the rotating triangular plate 25 to rotate, the moving slider 43 moves back and forth in the limiting slide groove 12, and the air distribution turntable 45 rotates at the same time as it moves to adjust the air outlet position.

[0056] Step 4: The plate-type stirring blades 24 rotate, driving the alkaline solution in the treatment tank body 1 to stir and continuously mix the alkaline solution and flue gas. At the same time, the plate-type stirring blades 24 break up large flue gas bubbles. The purified flue gas passes through the pores on the partition plate 11 and comes into contact with the activated carbon adsorption particles.

[0057] Step 5: The activated carbon adsorption particles undergo secondary adsorption and purification. The spiral stirring blade 23 rotates to stir the activated carbon adsorption particles up and down. The gas purified by adsorption is discharged from the top of the treatment tank body 1.

[0058] In summary, the present invention proposes an industrial submerged arc furnace flue gas desulfurization and denitrification device and its implementation method. An outlet component 4 is installed at the bottom of the treatment tank body 1, and multiple gas distribution turntables 45 are provided to disperse the flue gas into the treatment tank body 1. Simultaneously, driven by the moving slider 43 and the rotating triangular plate 25, the gas distribution turntable 45 rotates while moving, further improving the dispersion of the flue gas and achieving uniform mixing of the flue gas and alkaline solution, thus improving the purification effect of the flue gas. The drive motor 21 drives the stirring shaft 22 to rotate, which in turn drives the spiral stirring blades 23, the plate-shaped stirring blades 24, and the rotating triangular plate 25 to rotate. The rotation of the spiral stirring blades 23 adsorbs activated carbon particles in the upper section. The activated carbon adsorption particles are stirred up and down, changing their vertical position and improving the adsorption effect. When the plate-shaped stirring blade 24 rotates, the alkaline solution overflowing from the adjacent guide hole 241 can converge and collide, improving the mixing effect of the alkaline solution and flue gas. The rotating triangular plate 25 rotates continuously, and the moving slider 43 moves back and forth in the limiting slide groove 12, constantly changing the position of the gas distribution turntable 45. All three are driven by the same drive, making them easy to control. The drain hole 121 is set in the limiting slide groove 12, located at the lowest point of the treatment tank body 1. Impurities contained in the discharged alkaline solution are easily deposited here. The moving slider 43, which moves back and forth, can push the deposited impurities into the drain hole 121 for discharge, enabling continuous desulfurization and denitrification.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A desulfurization and denitrification device for flue gas from an industrial submerged arc furnace, comprising a treatment tank body (1), characterized in that: The processing tank body (1) is provided with a partition plate (11) inside, and a stirring assembly (2) is movably connected to the partition plate (11). A liquid outlet tank (3) is fixedly connected to the lower end of the processing tank body (1). A limiting groove (12) is formed in an annular shape on the inner wall of the end where the processing tank body (1) is connected to the liquid outlet tank (3). An air outlet assembly (4) is movably connected in the limiting groove (12). The air outlet assembly (4) includes a main air outlet (41), an elastic pipe (42), and a movable slider (43). Support spring (44) and air distribution turntable (45), the output end of the main air outlet (41) is provided with annularly distributed elastic pipe (42), the elastic pipe (42) is connected to the movable slider (43), the upper end of the movable slider (43) is movably connected to the air distribution turntable (45), the movable slider (43) is movably connected to the limiting slide groove (12), the side of the movable slider (43) is fixedly connected to the support spring (44), one end of the support spring (44) is fixedly connected to one end of the limiting slide groove (12); The movable slider (43) is provided with a buffer groove (431) inside, which is connected to the elastic pipe (42). The upper end of the movable slider (43) is provided with a limit ring (432), which is movably connected to the air distribution turntable (45). The lower surface of the air distribution turntable (45) is provided with a rotating groove that matches the limit ring (432), which is movably connected to the limit ring (432). An exhaust hole (451) is opened at the position corresponding to the buffer groove (431) on the air distribution turntable (45). A first external locking tooth (452) is provided on the side wall of the air distribution turntable (45). The stirring assembly (2) includes a drive motor (21), a stirring shaft (22), a spiral stirring blade (23), a plate-shaped stirring blade (24), and a rotating triangular plate (25). The drive motor (21) is installed at the upper end of the processing tank body (1), and the output end of the drive motor (21) passes through the processing tank body (1) and is fixedly connected to the stirring shaft (22). The stirring shaft (22) is movably connected to the partition plate (11) through a bearing. The spiral stirring blade (23) is provided on the stirring shaft (22) above the partition plate (11), and the plate-shaped stirring blade (24) is provided on the stirring shaft (22) below the partition plate (11). The rotating triangular plate (25) is fixedly connected to the lower end of the stirring shaft (22). The outer wall of the rotating triangular plate (25) is provided with a second outer locking tooth (251), which meshes with the first outer locking tooth (452).

2. The industrial submerged arc furnace flue gas desulfurization and denitrification device as described in claim 1, characterized in that: The exhaust holes (451) are distributed in concentric circles. The exhaust holes (451) are inclined, and the inclination angle of the exhaust holes (451) on the outer circle is greater than that of the exhaust holes (451) on the inner circle.

3. The industrial submerged arc furnace flue gas desulfurization and denitrification device as described in claim 2, characterized in that: The main air outlet (41) is provided with an air inlet pipe (411) at the air inlet end. One end of the air inlet pipe (411) extends to the outside of the liquid outlet tank (3) and is connected to the flue gas discharge pipe.

4. The industrial submerged arc furnace flue gas desulfurization and denitrification device as described in claim 3, characterized in that: The plate-shaped stirring blade (24) has a guide hole (241) and adjacent guide holes (241) have opposite inclination angles.

5. The industrial submerged arc furnace flue gas desulfurization and denitrification device as described in claim 4, characterized in that: The limiting slide groove (12) is provided with a drain hole (121), which is connected to the liquid outlet tank (3).

6. A method for implementing the industrial submerged arc furnace flue gas desulfurization and denitrification device as described in claim 5, characterized in that, Includes the following steps: S1: Inject alkaline solution into the treatment tank body (1), the height of the alkaline solution does not exceed the height of the partition plate (11), activated carbon adsorption particles are loaded into the treatment tank body (1) above the partition plate (11), and waste gas is introduced into the treatment tank body (1) through the gas outlet component (4), and the stirring component (2) is turned on; S2: The flue gas after dust removal enters the total gas outlet (41) through the gas inlet pipe (411), and the gas is evenly distributed into the elastic pipe (42) through the total gas outlet (41). The elastic pipe (42) introduces the flue gas into the buffer tank (431), and then the gas distribution turntable (45) mixes the flue gas with the alkaline solution to fully react and purify the flue gas; S3: The stirring shaft (22) drives the rotation The triangular plate (25) rotates, and the sliding block (43) moves back and forth in the limiting groove (12). The gas distribution turntable (45) rotates while moving to adjust the gas outlet position. S4: The plate-shaped stirring blade (24) rotates, driving the alkaline solution in the treatment tank body (1) to stir and continuously mix the alkaline solution and flue gas. At the same time, the plate-shaped stirring blade (24) breaks up large flue gas bubbles. The purified flue gas passes through the air holes on the partition plate (11) and comes into contact with the activated carbon adsorption particles. S5: The activated carbon adsorption particles undergo secondary adsorption purification. The spiral stirring blade (23) rotates, stirring the activated carbon adsorption particles up and down. The gas purified by adsorption is discharged from the top of the treatment tank body (1).

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