Novel power generation environment-friendly desulfurization and denitrification integrated device and use method thereof

Abstract

The novel power generation environment-friendly desulfurization and denitrification integrated device comprises a treatment box, a denitrification cylinder, a gas supply mechanism, a stirring mechanism and a driving mechanism, a desulfurization chamber is arranged at the bottom in the treatment box, partition plates are welded in the desulfurization chamber, the partition plates are alternately arranged on the two sides in the desulfurization chamber, and a base is welded in the treatment box; the denitration cylinder rotates in the base, the gas supply mechanism is used for supplying gas into the denitration cylinder and comprises a T-shaped pipe, the stirring mechanism is used for stirring the interior of the denitration cylinder, the denitration cylinder comprises stirring blades, and the driving mechanism is used for driving the T-shaped pipe, the denitration cylinder and the stirring blades to rotate. Desulfurization and denitration reactions are integrated in one device, so that the occupied area of equipment is reduced, and the investment cost is reduced; the advancing distance during the flue gas desulfurization reaction is prolonged, the reaction time is prolonged, and the desulfurization effect of the flue gas is better; the stirring forces in two directions are matched, so that the flue gas, the ammonia gas and the denitration catalyst are mixed more completely, and the denitration effect is better.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment, and in particular to a novel integrated desulfurization and denitrification device for power generation and an application method thereof. Background Art

[0002] Thermal power generation is a method of generating electricity by burning fossil fuels (such as coal, oil or natural gas). Fuel (such as coal, oil or natural gas) burns in a boiler to release heat energy. During the combustion process, the fuel reacts with oxygen to generate heat and flue gas. The composition of flue gas is complex, mainly containing nitrogen oxides (NO X ), sulfur dioxide (SO 2 ), carbon monoxide (CO), carbon dioxide (CO 2 ), hydrogen sulfide (H 2 S), hydrogen cyanide (HCN), residual ammonia, phenol, coal dust, tar, etc. Faced with increasingly severe environmental pressure, my country has paid more and more attention to environmental pollution in recent years, and has increasingly stringent requirements for flue gas emissions and energy conservation and consumption reduction. The key to reducing flue gas pollutant emissions lies in strengthening the control of sulfur dioxide, nitrogen oxides and particulate matter emissions.

[0003] Wet desulfurization and SCR denitrification technologies have been promoted and applied to a certain extent in the field of flue gas treatment. In the current flue gas desulfurization and denitrification process, due to the large amount of flue gas and the variety of pollutants, there are generally many process links, large equipment footprint, and high investment. Therefore, merging treatment units, shortening treatment links, and modular design are the main development directions. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a new type of environmentally friendly desulfurization and denitrification integrated device for power generation and a method of using the same.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A novel integrated desulfurization and denitrification device for power generation and environmental protection, comprising: a treatment box, a desulfurization chamber is provided at the bottom of the treatment box, a partition is vertically welded inside the desulfurization chamber, and a plurality of partitions are provided and alternately arranged on both sides of the desulfurization chamber;

[0007] Denitration cylinder, a base is welded inside the treatment box, and the denitration cylinder is vertically rotatably connected inside the base;

[0008] An air supply mechanism, the air supply mechanism is used to supply air into the denitration cylinder, and the air supply mechanism includes a T-shaped pipe;

[0009] A stirring mechanism, the stirring mechanism is used to stir the interior of the denitration cylinder, and the denitration cylinder includes stirring blades;

[0010] A driving mechanism is used to drive the T-tube, the denitration cylinder and the stirring blades to rotate.

[0011] As a further technical solution of the present invention, a second side door is hingedly connected to the outside of the desulfurization chamber outside the treatment box, a first side door is hingedly connected to the outside of the treatment box above the second side door, and a third side door is hingedly connected to the bottom of the denitrification cylinder.

[0012] As a further technical solution of the present invention, a liquid filling port is opened at a corner of the top of the desulfurization chamber, and the top of the liquid filling port is covered with a top cover. A smoke inlet pipe is horizontally connected to one side of the outside of the desulfurization chamber, and a smoke outlet pipe is vertically connected to the bottom of the denitrification cylinder. The smoke outlet pipe passes through the base and is rotatably connected to the base.

[0013] As a further technical solution of the present invention, the bottom end of the smoke outlet pipe is connected and rotatably connected to an L-shaped smoke exhaust pipe, the other end of the L-shaped smoke exhaust pipe extends out of the interior of the treatment box, a corner of the top of the desulfurization chamber is connected to an L-shaped ventilation pipe, an ammonia pipe horizontally penetrates one side of the outside of the treatment box, and the other ends of the L-shaped ventilation pipe and the ammonia pipe are vertically connected to the same air supply pipe.

[0014] As a further technical solution of the present invention, the gas supply mechanism also includes a nozzle, the top end of the T-tube and the bottom end of the gas supply pipe are connected and rotatably connected, the T-tube extends into the denitrification cylinder and is rotatably connected to the denitrification cylinder, and there are multiple nozzles, and the multiple nozzles are evenly distributed at the bottom of the T-tube along the horizontal direction.

[0015] As a further technical solution of the present invention, the stirring mechanism also includes a propeller, which is welded to the inner wall of the denitrification cylinder. A stirring shaft horizontally penetrates and is rotatably connected to the middle of one side of the denitrification cylinder. A plurality of stirring blades are provided and are evenly welded to the outer periphery of the stirring shaft.

[0016] As a further technical solution of the present invention, the driving mechanism includes a rotating motor, which is vertically fixed on one side of the top of the processing box. The output shaft of the rotating motor is vertically fixed with a rotating shaft, which extends into the processing box and is rotatably connected to the processing box. A first gear is welded to the bottom end of the rotating shaft.

[0017] As a further technical solution of the present invention, an external gear ring is welded on the outer periphery of the denitrification cylinder, the external gear ring is meshed with the first gear, a belt is connected between the rotating shaft and the T-tube, a driven bevel gear is welded at one end of the stirring shaft, and a driving bevel gear is horizontally meshed with the top of the driven bevel gear.

[0018] As a further technical solution of the present invention, a support block is welded to the outside of the denitrification cylinder, a connecting shaft vertically penetrates through the support block and is rotatably connected, the active bevel gear is welded to the bottom end of the connecting shaft, a second gear is welded to the top end of the connecting shaft, an internal gear ring is welded to the inner wall of the treatment box, and the internal gear ring is meshed with the second gear.

[0019] A method for using a novel integrated desulfurization and denitrification device for power generation and environmental protection includes the following specific steps:

[0020] S1: Open the first side door, add lime slurry into the desulfurization chamber through the liquid adding port, and then open the third side door to add denitration catalyst into the denitration cylinder;

[0021] S2: Flue gas is introduced into the desulfurization chamber through the flue gas inlet pipe. The flue gas moves back and forth between multiple partitions. The flue gas and lime slurry undergo a desulfurization reaction to generate solid by-products.

[0022] S3: The flue gas after desulfurization flows from the L-shaped ventilation pipe to the air supply pipe, and the ammonia pipe also introduces ammonia into the air supply pipe. The flue gas after desulfurization and ammonia enter the T-shaped pipe together, and then are sprayed into the denitrification cylinder through multiple nozzles;

[0023] S4: Start the rotating motor to drive the rotating shaft to rotate, and the rotating shaft drives the T-tube to rotate forward through the belt, so that the flue gas after desulfurization and ammonia are sprayed into the denitrification cylinder in a spiral shape;

[0024] S5: At the same time, the rotating shaft drives the denitrification cylinder to rotate in the opposite direction through the first gear and the outer gear ring, and the denitrification cylinder drives the propeller to rotate in the opposite direction. The spiral desulfurized flue gas and ammonia cooperate with the propeller rotating in the opposite direction to form a stirring force in the vertical direction;

[0025] S6: The denitrification cylinder drives the connecting shaft to revolve through the support block, and the connecting shaft drives the second gear to revolve. Since the second gear is meshed with the inner gear ring, the second gear revolves while rotating. The second gear drives the active bevel gear to rotate through the connecting shaft, and the active bevel gear drives the stirring shaft to rotate through the driven bevel gear. The stirring shaft drives multiple stirring blades to rotate to form a stirring force in the horizontal direction, thereby stirring the desulfurized flue gas, ammonia and denitrification catalyst, and the desulfurized flue gas, ammonia and denitrification catalyst undergo a denitrification reaction;

[0026] S7: The flue gas after desulfurization is discharged into the L-shaped exhaust pipe through the smoke outlet pipe. The second side door can be opened to clean the lime slurry and solid by-products after the reaction.

[0027] The beneficial effects of the present invention are as follows: desulfurization and denitrification reactions are integrated into one device, thereby reducing the floor space occupied by the equipment and lowering the investment cost; the travel distance of the flue gas desulfurization reaction is extended, thereby increasing the reaction time, making the desulfurization of the flue gas more complete and the desulfurization effect better; and utilizing the coordination of stirring forces in the vertical and horizontal directions to make the mixing of the desulfurized flue gas, ammonia and denitrification catalyst more complete, with a larger contact area and a better denitrification effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the external structure of a new type of integrated desulfurization and denitrification device for power generation and environmental protection proposed by the present invention;

[0029] Figure 2 This is a schematic diagram of the front view and cross-section structure of a new type of integrated desulfurization and denitrification device for power generation and environmental protection proposed by the present invention;

[0030] Figure 3 This is a schematic diagram of a cross-sectional structure of a novel integrated desulfurization and denitration device for power generation and environmental protection proposed by the present invention;

[0031] Figure 4 This is a schematic diagram of the internal structure of a new type of integrated desulfurization and denitrification device for power generation and environmental protection proposed by the present invention;

[0032] Figure 5 This is a schematic diagram of the internal partial upward view of a novel integrated desulfurization and denitration device for power generation and environmental protection proposed by the present invention;

[0033] Figure 6 This is a schematic diagram of the partial structure of a new type of integrated desulfurization and denitrification device for power generation and environmental protection proposed by the present invention.

[0034] In the figure: 1. rotating motor; 2. first side door; 3. second side door; 4. smoke inlet pipe; 5. L-shaped smoke exhaust pipe; 6. treatment box; 7. ammonia pipe; 8. outer gear ring; 9. third side door; 10. liquid filling port; 11. desulfurization chamber; 12. partition; 13. base; 14. denitrification cylinder; 15. inner gear ring; 16. belt; 17. rotating shaft; 18. first gear; 19. second gear; 20. connecting shaft; 21. driving bevel gear; 22. driven bevel gear; 23. L-shaped ventilation pipe; 24. supporting block; 25. smoke outlet pipe; 26. propeller; 27. air supply pipe; 28. T-shaped pipe; 29. ​​nozzle; 30. stirring blade; 31. stirring shaft. DETAILED DESCRIPTION

[0035] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0036] Please see attached Figure 1 -Attached Figure 6A novel integrated desulfurization and denitrification device for power generation and environmental protection includes: a treatment box 6, a desulfurization chamber 11 is provided at the bottom of the treatment box 6, a partition 12 is vertically welded inside the desulfurization chamber 11, and a plurality of partitions 12 are provided and alternately arranged on both sides of the desulfurization chamber 11;

[0037] The denitration cylinder 14 is welded with a base 13 inside the treatment box 6, and the denitration cylinder 14 is vertically rotatably connected to the inside of the base 13; connecting plates are welded on both sides of the base 13, and the other end of the connecting plate is welded to the inner wall of the treatment box 6;

[0038] An air supply mechanism, which is used to supply air into the denitration cylinder 14, and includes a T-shaped pipe 28;

[0039] A stirring mechanism, the stirring mechanism is used to stir the interior of the denitration cylinder 14, and the denitration cylinder 14 includes stirring blades 30;

[0040] The driving mechanism is used to drive the T-tube 28, the denitration cylinder 14 and the stirring blade 30 to rotate.

[0041] Please see attached Figure 1-6 In a preferred embodiment, a second side door 3 is hingedly connected to the outside of the treatment box 6 and located outside the desulfurization chamber 11, a first side door 2 is hingedly connected to the outside of the treatment box 6 and located above the second side door 3, and a third side door 9 is hingedly connected to the bottom of the denitrification cylinder 14.

[0042] Please see attached Figure 1-6 In a preferred embodiment, a liquid filling port 10 is opened at a corner of the top of the desulfurization chamber 11, and a top cover is provided on the top of the liquid filling port 10. A smoke inlet pipe 4 is horizontally connected to the outside of the desulfurization chamber 11, and a smoke outlet pipe 25 is vertically connected to the bottom of the denitrification cylinder 14. The smoke outlet pipe 25 passes through the base 13 and is rotatably connected to the base 13.

[0043] Please see attached Figure 1-6 In a preferred embodiment, the bottom end of the smoke outlet pipe 25 is connected and rotatably connected to an L-shaped smoke exhaust pipe 5, the other end of the L-shaped smoke exhaust pipe 5 extends out of the processing box 6, a corner of the top of the desulfurization chamber 11 is connected to an L-shaped ventilation pipe 23, an ammonia pipe 7 is horizontally penetrated on one side of the outside of the processing box 6, and the other end of the L-shaped ventilation pipe 23 and the ammonia pipe 7 are vertically connected to the same air supply pipe 27.

[0044] Please see attached Figure 1-6 In a preferred embodiment, the gas supply mechanism also includes a nozzle 29. The top end of the T-tube 28 is connected to the bottom end of the gas supply pipe 27 and is rotatably connected. The T-tube 28 extends into the denitrification cylinder 14 and is rotatably connected to the denitrification cylinder 14. A plurality of nozzles 29 are provided, and the plurality of nozzles 29 are evenly distributed at the bottom of the T-tube 28 in the horizontal direction.

[0045] Please see attached Figure 1-6In a preferred embodiment, the stirring mechanism also includes a propeller 26, which is welded to the inner wall of the denitrification cylinder 14. A stirring shaft 31 is horizontally penetrated and rotatably connected to the middle of one side of the denitrification cylinder 14. A plurality of stirring blades 30 are provided and are evenly welded to the outer periphery of the stirring shaft 31.

[0046] Please see attached Figure 1-6 In a preferred embodiment, the driving mechanism includes a rotating motor 1, which is vertically fixedly installed on one side of the top of the processing box 6. The output shaft of the rotating motor 1 is vertically fixedly installed with a rotating shaft 17, which extends into the processing box 6 and is rotatably connected to the processing box 6. A first gear 18 is welded to the bottom end of the rotating shaft 17.

[0047] Please see attached Figure 1-6 In a preferred embodiment, an outer gear ring 8 is welded to the outer periphery of the denitrification cylinder 14, the outer gear ring 8 is meshed with the first gear 18, a belt 16 is connected between the rotating shaft 17 and the T-tube 28, a driven bevel gear 22 is welded to one end of the stirring shaft 31, and the top of the driven bevel gear 22 is horizontally meshed with the driving bevel gear 21.

[0048] Please see attached Figure 1-6 In a preferred embodiment, a support block 24 is welded to the outside of the denitrification cylinder 14, a connecting shaft 20 is vertically penetrated and rotatably connected to the support block 24, a driving bevel gear 21 is welded to the bottom end of the connecting shaft 20, a second gear 19 is welded to the top end of the connecting shaft 20, an inner gear ring 15 is welded to the inner wall of the treatment box 6, and the inner gear ring 15 is meshed with the second gear 19. Connecting blocks are welded on both sides of the inner gear ring 15, and the two connecting blocks are welded to the inner wall of the treatment box 6.

[0049] A method for using a novel integrated desulfurization and denitrification device for power generation and environmental protection includes the following specific steps:

[0050] S1: Open the first side door 2, add lime slurry into the desulfurization chamber 11 through the liquid adding port 10, and then open the third side door 9 to add denitration catalyst into the denitration cylinder 14;

[0051] S2: Flue gas is introduced into the desulfurization chamber 11 through the flue gas inlet pipe 4, and the flue gas moves back and forth between the multiple partitions 12, and the flue gas and lime slurry undergo a desulfurization reaction to generate solid by-products;

[0052] Prolong the travel distance of the flue gas desulfurization reaction, thereby increasing the reaction time, making the flue gas desulfurization more complete and the desulfurization effect better.

[0053] S3: The desulfurized flue gas flows from the L-shaped ventilation pipe 23 to the air supply pipe 27, and the ammonia pipe 7 also introduces ammonia into the air supply pipe 27. The desulfurized flue gas and ammonia enter the T-shaped pipe 28 together, and then are sprayed into the denitrification cylinder 14 through multiple nozzles 29;

[0054] S4: Start the rotating motor 1 to drive the rotating shaft 17 to rotate, and the rotating shaft 17 drives the T-shaped pipe 28 to rotate forward through the belt 16, so that the desulfurized flue gas and ammonia are sprayed into the denitrification cylinder 14 in a spiral shape;

[0055] S5: At the same time, the rotating shaft 17 drives the denitrification cylinder 14 to rotate in the opposite direction through the first gear 18 and the outer gear ring 8, and the denitrification cylinder 14 drives the propeller to rotate in the opposite direction, and the spiral desulfurized flue gas and ammonia cooperate with the propeller rotating in the opposite direction to form a stirring force in the vertical direction;

[0056] S6: The denitrification cylinder 14 drives the connecting shaft 20 to revolve through the support block 24, and the connecting shaft 20 drives the second gear 19 to revolve. Since the second gear 19 is meshed with the inner gear ring 15, the second gear 19 revolves while rotating. The second gear 19 drives the active bevel gear 21 to rotate through the connecting shaft 20, and the active bevel gear 21 drives the stirring shaft 31 to rotate through the driven bevel gear 22. The stirring shaft 31 drives the multiple stirring blades 30 to rotate to form a stirring force in the horizontal direction, thereby stirring the desulfurized flue gas, ammonia and denitrification catalyst, and the desulfurized flue gas, ammonia and denitrification catalyst undergo a denitrification reaction;

[0057] By coordinating the stirring forces in both vertical and horizontal directions, the desulfurized flue gas, ammonia and denitrification catalyst are mixed more completely, the contact area is larger and the denitrification effect is better.

[0058] S7: The flue gas after desulfurization is discharged into the L-shaped exhaust pipe 5 through the smoke outlet pipe 25, and the second side door 3 can be opened to clean the lime slurry and solid by-products after the reaction.

[0059] Integrating desulfurization and denitrification reactions into one device can reduce equipment footprint and investment costs.

[0060] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0061] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A new integrated desulfurization and denitrification device for power generation and environmental protection, It is characterized in that include: A treatment box (6), wherein a desulfurization chamber (11) is provided at the bottom of the treatment box (6), a partition (12) is vertically welded inside the desulfurization chamber (11), and a plurality of partitions (12) are provided and are alternately arranged on both sides of the desulfurization chamber (11); A denitration cylinder (14), wherein a base (13) is welded inside the treatment box (6), and the denitration cylinder (14) is vertically rotatably connected to the inside of the base (13); An air supply mechanism, the air supply mechanism is used to supply air into the denitration cylinder (14), the air supply mechanism comprising a T-shaped pipe (28); A stirring mechanism, the stirring mechanism is used to stir the interior of the denitration cylinder (14), and the denitration cylinder (14) includes a stirring blade (30); A driving mechanism is used to drive the T-tube (28), the denitration cylinder (14) and the stirring blade (30) to rotate.

2. According to the new integrated desulfurization and denitrification device for power generation and environmental protection according to claim 1, It is characterized in that The outside of the treatment box (6) is hinged with a second side door (3) located outside the desulfurization chamber (11), the outside of the treatment box (6) is hinged with a first side door (2) located above the second side door (3), and the outside of the denitrification cylinder (14) is hinged with a third side door (9) located below.

3. According to the new integrated desulfurization and denitrification device for power generation and environmental protection according to claim 1, It is characterized in that A liquid filling port (10) is provided at one corner of the top of the desulfurization chamber (11), and a top cover is provided on the top of the liquid filling port (10). A smoke inlet pipe (4) is horizontally connected to one side of the outside of the desulfurization chamber (11), and a smoke outlet pipe (25) is vertically connected to the bottom of the denitrification cylinder (14). The smoke outlet pipe (25) passes through the base (13) and is rotatably connected to the base (13).

4. A new integrated desulfurization and denitrification device for power generation and environmental protection according to claim 3, It is characterized in that The bottom end of the smoke outlet pipe (25) is connected and rotatably connected to an L-shaped smoke exhaust pipe (5), the other end of the L-shaped smoke exhaust pipe (5) extends out of the interior of the treatment box (6), a corner of the top of the desulfurization chamber (11) is connected to an L-shaped ventilation pipe (23), an ammonia pipe (7) is horizontally penetrated through one side of the outside of the treatment box (6), and the other end of the L-shaped ventilation pipe (23) and the ammonia pipe (7) are vertically connected to the same air supply pipe (27).

5. A new integrated desulfurization and denitrification device for power generation and environmental protection according to claim 4, It is characterized in that The gas supply mechanism also includes a nozzle (29), the top end of the T-shaped tube (28) is connected to the bottom end of the gas supply tube (27) and is rotatably connected, the T-shaped tube (28) extends into the denitrification tube (14) and is rotatably connected to the denitrification tube (14), and a plurality of nozzles (29) are provided, and the plurality of nozzles (29) are evenly distributed at the bottom of the T-shaped tube (28) in the transverse direction.

6. A new integrated desulfurization and denitrification device for power generation and environmental protection according to claim 5, It is characterized in that The stirring mechanism also includes a propeller (26), the propeller (26) is welded to the inner wall of the denitration cylinder (14), a stirring shaft (31) is horizontally penetrated and rotatably connected to the middle of one side of the denitration cylinder (14), and a plurality of stirring blades (30) are provided and are uniformly welded to the outer periphery of the stirring shaft (31).

7. A new integrated desulfurization and denitrification device for power generation and environmental protection according to claim 6, It is characterized in that The driving mechanism comprises a rotating motor (1), the rotating motor (1) being vertically fixedly mounted on one side of the top of the processing box (6), the output shaft of the rotating motor (1) being vertically fixedly mounted with a rotating shaft (17), the rotating shaft (17) extending into the processing box (6) and being rotatably connected to the processing box (6), and a first gear (18) being welded to the bottom end of the rotating shaft (17).

8. A new integrated desulfurization and denitrification device for power generation and environmental protection according to claim 7, It is characterized in that An outer gear ring (8) is welded to the outer periphery of the denitrification cylinder (14), and the outer gear ring (8) is meshed with the first gear (18). A belt (16) is connected between the rotating shaft (17) and the T-tube (28). A driven bevel gear (22) is welded to one end of the stirring shaft (31), and the top of the driven bevel gear (22) is horizontally meshed with the driving bevel gear (21).

9. A new integrated desulfurization and denitrification device for power generation and environmental protection according to claim 8, It is characterized in that A support block (24) is welded to the outside of the denitrification cylinder (14), a connecting shaft (20) vertically penetrates through the support block (24) and is rotatably connected, the active bevel gear (21) is welded to the bottom end of the connecting shaft (20), a second gear (19) is welded to the top end of the connecting shaft (20), an internal gear ring (15) is welded to the inner wall of the treatment box (6), and the internal gear ring (15) is meshed with the second gear (19).

10. A method for using a new integrated desulfurization and denitrification device for power generation and environmental protection, It is characterized in that The specific steps include: S1: Open the first side door (2), add lime slurry into the desulfurization chamber (11) through the liquid adding port (10), and then open the third side door (9) to add a denitration catalyst into the denitration cylinder (14); S2: Flue gas is introduced into the desulfurization chamber (11) through the flue gas inlet pipe (4), and the flue gas moves back and forth between the plurality of partitions (12), and the flue gas and the lime slurry undergo a desulfurization reaction to generate solid by-products; S3: The desulfurized flue gas is passed from the L-shaped ventilation pipe (23) to the air supply pipe (27), and at the same time, the ammonia pipe (7) also introduces ammonia into the air supply pipe (27). The desulfurized flue gas and ammonia enter the T-shaped pipe (28) together, and then are sprayed into the denitrification cylinder (14) through multiple nozzles (29); S4: starting the rotating motor (1) to drive the rotating shaft (17) to rotate, and the rotating shaft (17) drives the T-shaped pipe (28) to rotate in the forward direction through the belt (16), so that the desulfurized flue gas and ammonia are sprayed into the denitrification cylinder (14) in a spiral shape; S5: At the same time, the rotating shaft (17) drives the denitration cylinder (14) to rotate in the opposite direction through the first gear (18) and the outer gear ring (8), and the denitration cylinder (14) drives the propeller to rotate in the opposite direction, and the spiral desulfurized flue gas and ammonia cooperate with the propeller rotating in the opposite direction to form a stirring force in the vertical direction; S6: The denitration cylinder (14) drives the connecting shaft (20) to revolve through the support block (24), and the connecting shaft (20) drives the second gear (19) to revolve. Since the second gear (19) and the inner gear ring (15) are meshed, the second gear (19) revolves while rotating. The second gear (19) drives the driving bevel gear (21) to rotate through the connecting shaft (20), and the driving bevel gear (21) drives the stirring shaft (31) to rotate through the driven bevel gear (22). The stirring shaft (31) drives the plurality of stirring blades (30) to rotate to form a stirring force in a horizontal direction, thereby stirring the desulfurized flue gas, ammonia and denitration catalyst, and the desulfurized flue gas, ammonia and denitration catalyst undergo a denitration reaction. S7: The flue gas after desulfurization is discharged into the L-shaped flue gas exhaust pipe (5) through the flue gas outlet pipe (25). The second side door (3) can be opened to clean the lime slurry and solid by-products after the reaction.

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