Biomass boiler flue gas denitration equipment

Abstract

The invention discloses biomass boiler flue gas denitration equipment, which belongs to the field of flue gas treatment, and comprises a denitration cylinder, a flue gas inlet pipe is fixedly mounted on one side of the denitration cylinder, a filter screen is fixedly mounted on one side, close to the flue gas inlet pipe, of an inner cavity of the denitration cylinder, and the denitration cylinder further comprises a mixing assembly, a flue gas inlet pipe and a flue gas outlet pipe, the mixing assembly comprises a round frame rotationally mounted in an inner cavity of the denitration cylinder, retarding plates are uniformly and fixedly mounted on the round frame, round openings are uniformly formed in each group of retarding plates, circular ring holes are formed in the outer sides of each group of round openings, and each group of circular ring holes are formed in the adjacent retarding plates; according to the flue gas denitration device, the contact duration of flue gas and ammonia gas can be prolonged, the mixing effect of the flue gas and the ammonia gas can be improved, the situation that in the past, the flue gas is high in flow speed and difficult to fully mix and react with the ammonia gas, and consequently the ammonia escape phenomenon is caused can be avoided, the safety of the reaction of the flue gas and the ammonia gas can be effectively improved, and the flue gas denitration effect is improved.

Description

Technical Field

[0001] The present invention relates to the field of flue gas treatment, and more specifically, to a biomass boiler flue gas denitrification device. Background Art

[0002] A biomass boiler is a device that uses biomass fuels (such as wood chips, straw, agricultural waste, etc.) for heat conversion. This type of boiler generates hot water or steam by burning biomass and is widely used in industrial heating, power generation, heating and other fields. Biomass boilers produce flue gas during the combustion process, which may contain nitrogen oxides. In order to reduce the emission of nitrogen oxides, flue gas denitrification technology is used to denitrify the flue gas generated by the biomass boiler.

[0003] The methods of flue gas denitrification usually include the following: ammonia denitrification, ammonia water denitrification and urea denitrification. In the case of ammonia denitrification, when using ammonia to denitrify flue gas, the flow rate of flue gas emission is relatively fast, which will reduce the contact time between flue gas and ammonia, making it difficult to ensure that the flue gas and ammonia are fully mixed and reacted, thereby failing to effectively remove nitrogen oxides in the flue gas. At the same time, unreacted ammonia will be directly discharged into the atmosphere, causing ammonia escape, which not only wastes the reactant, but also causes pollution to the environment. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a biomass boiler flue gas denitrification equipment, which can increase the contact time between flue gas and ammonia and improve the mixing effect of flue gas and ammonia, and avoid the previous situation where the flue gas flow rate is too fast to fully mix and react with ammonia, thereby causing ammonia escape, thereby effectively improving the safety of the reaction between flue gas and ammonia and improving the flue gas denitrification effect.

[0005] To solve the above problems, the present invention adopts the following technical solutions.

[0006] A biomass boiler flue gas denitration device comprises a denitration cylinder, a smoke inlet pipe is fixedly installed on one side of the denitration cylinder, and a filter is fixedly installed on the side of the inner cavity of the denitration cylinder close to the smoke inlet pipe. Also includes: A mixing assembly, the mixing assembly includes a circular frame rotatably mounted on the inner cavity of the denitrification cylinder, a deceleration plate is evenly fixedly mounted on the circular frame, circular openings are evenly opened on each group of deceleration plates, annular holes are arranged on the outer side of each group of circular openings, each group of annular holes are opened in adjacent denitrification plates, exhaust holes are evenly opened on the inner cavity wall of each group of circular openings, each group of exhaust holes is connected with the inner cavity of adjacent annular holes, air inlet holes are opened in each group of denitrification plates, each group of annular holes is connected with the adjacent air inlet holes, an annular cavity is opened on the top of the circular frame, each group of air inlet holes is connected with the inner cavity of the annular cavity, and a driving assembly is arranged on the side of the inner cavity of the denitrification cylinder away from the smoke inlet pipe.

[0007] Furthermore, the driving assembly includes a circular plate fixedly mounted on the inner cavity wall of the denitrification cylinder, a rotating rod is rotatably mounted between the filter screen and the circular plate, the side of each group of the deceleration plates away from the circular frame is fixedly mounted to the outer wall of the rotating rod, a motor is fixedly mounted on one side of the circular plate, the output shaft of the motor is fixedly mounted on one end of the rotating rod, an ammonia box is fixedly mounted on one side of the top of the denitrification cylinder, an extraction pipe is fixedly mounted on one side of the ammonia box, the other end of the extraction pipe passes through the denitrification cylinder and is connected to the inner cavity of the circular cavity, and an air pump is fixedly mounted on the extraction pipe.

[0008] Furthermore, a circular tube is provided on one side of the circular frame away from the filter screen, the circular tube is fixedly installed with the inner cavity of the denitrification cylinder, a circulation pipe is provided in the circular tube, the circulation pipe is fixedly installed with the circular tube and the denitrification cylinder, a leakage groove is provided on the bottom wall of the inner cavity of the circular tube, a drainage pipe is fixedly installed on the bottom wall of the inner cavity of the leakage groove, and the other end of the drainage pipe passes through the circular tube and the denitrification cylinder, and extends to the bottom of the denitrification cylinder.

[0009] Furthermore, a large gear is provided on the side of the circular tube close to the circular plate, and the large gear is fixedly installed with the rotating rod. Two groups of fan blades are provided on the side of the large gear close to the circulation pipe, and the two groups of fan blades are rotatably installed with the inner cavity wall of the circular tube. Small gears are fixedly installed on the ends of the two groups of fan blades away from the circulation pipe, and the two groups of small gears are meshed with the large gear.

[0010] Furthermore, vertical plates are evenly arranged on the side of the inner cavity of the circular tube away from the fan blades, each group of the vertical plates is fixedly mounted on the outer wall of the rotating rod, each group of the vertical plates is provided with a groove on the side away from the rotating rod, each group of the grooves is slidably provided with a fixed block in the inner cavity, each group of the fixed blocks and the inner cavity wall of the adjacent groove are fixedly provided with a telescopic spring, each group of the fixed blocks is rollingly installed with a ball on the side away from the vertical plates, and a semicircular groove matching the ball is provided on the inner cavity wall of the circular tube.

[0011] Furthermore, a brush plate is fixedly mounted on one end of the rotating rod away from the motor, and the brush plate is arranged in contact with one side of the filter screen.

[0012] Furthermore, an inclined plate is provided on a side of the brush plate away from the filter screen, and the inclined plate is fixedly mounted on the bottom wall of the inner cavity of the denitrification cylinder.

[0013] Furthermore, a U-shaped frame is provided below the inclined plate, and the U-shaped frame and the bottom wall of the denitrification cylinder are detachably mounted.

[0014] Furthermore, connecting plates are evenly arranged between the filter screen and the circular frame, and each group of the connecting plates is fixedly mounted to the outer wall of the rotating rod.

[0015] Furthermore, impregnated activated carbon is evenly arranged on the circular plate, and each group of telescopic springs is in a compressed state in an initial state.

[0016] Compared with the prior art, the present invention has the following beneficial effects: (1) This scheme can achieve uniform dispersion of ammonia in each group of circular mouth cavities in the inner cavity of the circular frame by rotating the retarder plate. When the flue gas passes through the inner cavity of the circular frame, the rotating rod drives each group of retarder plates to rotate, which can change the path of the flue gas flow and reduce the flow rate of the flue gas. The flue gas can be broken up and diffused in the inner cavity of the circular frame, which can effectively increase the contact time between the flue gas and ammonia, so that the flue gas and ammonia can be fully mixed and reacted, which can effectively improve the mixing effect of the flue gas and ammonia, and avoid the previous fast flue gas flow rate that is difficult to fully mix and react with ammonia, thereby causing ammonia escape. It can effectively improve the safety of the reaction between flue gas and ammonia and improve the effect of flue gas denitrification.

[0017] (2) This scheme drives the large gear to rotate by rotating the rod, and at the same time drives the small gear to rotate rapidly. At this time, the small gear will drive the fan blades to rotate rapidly. The rotation of the fan blades will blow air to the left of the inner cavity of the circular tube, which can slow down the flow rate of nitrogen and water vapor in the inner cavity of the circular tube, and can effectively increase the contact time between water vapor and the surface of the circulation tube, thereby effectively improving the effect of heat exchange, and then effectively improving the recovery effect of water vapor, achieving the purpose of resource recycling and avoiding resource waste, which can effectively improve the effect of flue gas denitrification. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the front side of the present invention; Figure 2 is a cross-sectional view of the denitration cylinder of the present invention; Figure 3 is a cross-sectional view of a circular frame of the present invention; Figure 4 For the present invention Figure 3 A magnified view of the structure of the middle part A; Figure 5 For the present invention Figure 3 A magnified view of the structure of the middle B section; Figure 6 It is an overall cross-sectional view of the present invention; Figure 7 For the present invention Figure 6 Enlarged view of the structure of the middle C section; Figure 8 For the present invention Figure 6 Enlarged view of the structure of part D in the middle.

[0019] Description of the numbers in the figure: 1. Denitrification cylinder; 2. Smoke inlet pipe; 3. Filter; 4. Round frame; 5. Retarder; 6. Round mouth; 7. Annular cavity; 8. Air inlet; 9. Annular hole; 10. Exhaust hole; 11. Brush plate; 12. Round plate; 13. Rotating rod; 14. Motor; 15. Ammonia box; 16. Air pump; 17. Extraction pipe; 18. Connecting plate; 19. Round pipe; 20. Circulation pipe; 21. Large gear; 22. Fan blade; 23. Small gear; 24. Leakage groove; 25. Drain pipe; 26. Vertical plate; 27. Groove; 28. Fixed block; 29. ​​Telescopic spring; 30. Ball; 31. Semicircular groove; 32. Inclined plate; 33. U-shaped frame. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0021] See also Figures 1 to 8 A biomass boiler flue gas denitrification device comprises a denitrification cylinder 1, a smoke inlet pipe 2 is fixedly installed on one side of the denitrification cylinder 1, and a filter screen 3 is fixedly installed on the side of the inner cavity of the denitrification cylinder 1 close to the smoke inlet pipe 2. Also includes: A mixing assembly, which includes a circular frame 4 rotatably installed in the inner cavity of the denitrification cylinder 1, a retarder 5 is evenly fixedly installed on the circular frame 4, each group of retarder plates 5 is evenly provided with a circular opening 6, the outer side of each group of circular openings 6 is provided with an annular hole 9, each group of annular holes 9 is provided in an adjacent retarder plate 5, exhaust holes 10 are evenly provided on the inner cavity wall of each group of circular openings 6, each group of exhaust holes 10 is connected with the inner cavity of the adjacent annular holes 9, each group of retarder plates 5 is provided with an air inlet hole 8, each group of annular holes 9 is connected with the adjacent air inlet hole 8, an annular cavity 7 is provided on the top of the circular frame 4, each group of air inlet holes 8 is connected with the inner cavity of the annular cavity 7, and a driving assembly is provided on the side of the inner cavity of the denitrification cylinder 1 away from the smoke inlet pipe 2.

[0022] The driving assembly includes a circular plate 12 fixedly mounted on the inner wall of the denitrification cylinder 1, a rotating rod 13 is rotatably mounted between the filter screen 3 and the circular plate 12, and each group of deceleration plates 5 is fixedly mounted on the outer wall of the rotating rod 13 on one side away from the circular frame 4. A motor 14 is fixedly mounted on one side of the circular plate 12, and the output shaft of the motor 14 is fixedly mounted on one end of the rotating rod 13. An ammonia tank 15 is fixedly mounted on one side of the top of the denitrification cylinder 1, and an extraction pipe 17 is fixedly mounted on one side of the ammonia tank 15. The other end of the extraction pipe 17 passes through the denitrification cylinder 1 and is connected to the inner cavity of the annular cavity 7, and an air pump 16 is fixedly mounted on the extraction pipe 17.

[0023] First, the flue gas exhaust pipe of the biomass boiler is connected to the smoke inlet pipe 2, and the smoke will be discharged into the denitrification tube 1 through the smoke inlet pipe 2, and then the motor 14 is turned on, and the output shaft of the motor 14 drives the rotating rod 13 to rotate. While the rotating rod 13 rotates, it will drive the circular frame 4 to rotate in the inner cavity of the denitrification tube 1 through each group of retarder plates 5, and at the same time, the air pump 16 is turned on. When the air pump 16 works, it will extract the ammonia in the ammonia box 15 through the extraction pipe 17 and discharge it into the inner cavity of the annular cavity 7. The ammonia in the inner cavity of the annular cavity 7 will be discharged into the inner cavity of the annular hole 9 through the air inlet hole 8, and the ammonia in the inner cavity of the annular hole 9 will be discharged into the inner cavity of the circular mouth 6 through the adjacent groups of exhaust holes 10. In the process of the rotating rod 13 driving each group of retarder plates 5 to rotate, the ammonia in the inner cavity of each group of circular mouths 6 can be evenly dispersed in the inner cavity of the circular frame 4, and the smoke inlet pipe 2 When the flue gas flows in the inner cavity of the denitrification cylinder 1, it will first be filtered by the filter 3, and the impurities in the flue gas will be filtered to the left side of the filter 3. The filtered flue gas will continue to flow to the right in the inner cavity of the denitrification cylinder 1. When the flue gas passes through the inner cavity of the circular frame 4, the rotating rod 13 drives each group of deceleration plates 5 to rotate, which can change the path of the flue gas flow and reduce the flow rate of the flue gas. The flue gas can be broken up and diffused in the inner cavity of the circular frame 4, which can effectively increase the contact time between the flue gas and ammonia, so that the flue gas and ammonia can be fully mixed and reacted, which can effectively improve the mixing effect of the flue gas and ammonia, and can avoid the previous situation where the flue gas flow rate is too fast to be fully mixed and reacted with ammonia, thereby causing ammonia escape, thereby effectively improving the safety of the reaction between the flue gas and ammonia and improving the effect of flue gas denitrification.

[0024] like Figures 1 to 3 , Figure 5 , Figure 6 and Figure 8 As shown, a circular tube 19 is provided on one side of the circular frame 4 away from the filter screen 3. The circular tube 19 is fixedly installed with the inner cavity of the denitrification cylinder 1. A circulation pipe 20 is provided in the circular tube 19. The circulation pipe 20 is fixedly installed with the circular tube 19 and the denitrification cylinder 1. A leakage groove 24 is provided on the bottom wall of the inner cavity of the circular tube 19. A drainage pipe 25 is fixedly installed on the bottom wall of the inner cavity of the leakage groove 24. The other end of the drainage pipe 25 passes through the circular tube 19 and the denitrification cylinder 1, and extends to the bottom of the denitrification cylinder 1.

[0025] A large gear 21 is provided on the side of the circular tube 19 close to the circular plate 12, and the large gear 21 is fixedly installed with the rotating rod 13. Two groups of fan blades 22 are provided on the side of the large gear 21 close to the circulation pipe 20. Both groups of fan blades 22 are rotatably installed with the inner cavity wall of the circular tube 19. Small gears 23 are fixedly installed on the ends of the two groups of fan blades 22 away from the circulation pipe 20, and both groups of small gears 23 are meshed with the large gear 21.

[0026] In the initial state, the two ends of the circulation pipe 20 are respectively installed with the external cold water tank, so that the cold water circulates in the inner cavity of the circulation pipe 20. After the flue gas and ammonia are fully mixed and reacted in the inner cavity of the circular frame 4, nitrogen and water vapor will be formed, which are harmless. Nitrogen and water vapor will continue to flow to the right in the inner cavity of the denitrification cylinder 1 and flow into the inner cavity of the circular tube 19. When the water vapor passes through the circulation pipe 20, it will exchange heat with the circulation pipe 20. After the heat exchange, water droplets will condense on the surface of the circulation pipe 20. When the rotating rod 13 rotates, it will drive the large gear 21 to rotate. The rotation of the large gear 21 will drive the small teeth on its upper and lower sides. The wheel 23 rotates, and through the cooperation between the large gear 21 and the small gear 23, the large gear 21 rotates and drives the small gear 23 to rotate rapidly. At this time, the small gear 23 drives the fan blade 22 to rotate rapidly. The rotation of the fan blade 22 will blow air to the inner cavity of the circular tube 19 to the left, which can slow down the flow rate of nitrogen and water vapor in the inner cavity of the circular tube 19, and effectively increase the contact time between the water vapor and the surface of the circulation tube 20, thereby effectively improving the effect of heat exchange, and then effectively improving the recovery effect of water vapor, achieving the purpose of resource recycling and avoiding waste of resources.

[0027] like Figure 5 and Figure 8As shown, vertical plates 26 are evenly arranged on the side of the inner cavity of the circular tube 19 away from the fan blades 22, and each group of vertical plates 26 is fixedly installed on the outer wall of the rotating rod 13. A groove 27 is opened on the side of each group of vertical plates 26 away from the rotating rod 13, and a fixed block 28 is slidably installed in the inner cavity of each group of grooves 27. A telescopic spring 29 is fixedly installed between each group of fixed blocks 28 and the inner cavity wall of the adjacent groove 27, and a ball 30 is rollingly installed on the side of each group of fixed blocks 28 away from the vertical plate 26. A semicircular groove 31 adapted to the ball 30 is opened on the inner cavity wall of the circular tube 19.

[0028] In the initial state, the collecting frame is placed under the drain pipe 25. When the output shaft of the motor 14 drives the rotating rod 13 to rotate, it will also drive each group of vertical plates 26 to rotate. The rotation of the vertical plates 26 will drive the balls 30 to move synchronously in the inner cavity of the denitrification cylinder 1 through the fixed blocks 28. When the balls 30 move out of the inner cavity of the semicircular grooves 31, the balls 30 will squeeze the fixed blocks 28 in the inner cavity of the grooves 27 to move toward the rotating rod 13 and squeeze the telescopic springs 29. At this time, the vertical plates 26 will drive the balls 30 to move on the inner cavity wall of the denitrification cylinder 1 through the fixed blocks 28. Under the action of the telescopic springs 29, the balls 30 will be tightly attached to the inner cavity wall of the circular tube 19. When the balls 30 move to the position of the next group of semicircular grooves 31, under the action of the telescopic springs 29, the telescopic springs 29 will release the balls 30. When 29 returns to its initial state, it will push the fixed block 28 to drive the ball 30 to move to its initial position, so that the fixed block 28 can drive the ball 30 to get stuck in the inner cavity of the semicircular groove 31. At this time, during the process of the rotating rod 13 driving the vertical plate 26 to rotate, under the action of the telescopic spring 29, the fixed block 28 will drive the ball 30 to reciprocate and hit the inner cavity of the semicircular groove 31, and vibrate the circular tube 19. The shock wave will be transmitted to the circulation pipe 20, so that the water droplets condensed after heat exchange on the circulation pipe 20 can be shaken off into the inner cavity of the leakage groove 24. The water droplets in the inner cavity of the leakage groove 24 will flow into the external collection frame through the drain pipe 25, which plays a role of vibration, making it easy to shake off the water droplets on the circulation pipe 20, and effectively improving the collection efficiency of the water droplets on the circulation pipe 20, thereby effectively improving the work efficiency.

[0029] like Figure 2 , Figure 3 and Figure 6 As shown, a brush plate 11 is fixedly mounted on one end of the rotating rod 13 away from the motor 14 , and the brush plate 11 is arranged in contact with one side of the filter screen 3 .

[0030] A slanted plate 32 is provided on one side of the brush plate 11 away from the filter screen 3 , and the slanted plate 32 is fixedly mounted on the bottom wall of the inner cavity of the denitration cylinder 1 .

[0031] A U-shaped frame 33 is provided below the inclined plate 32 , and the U-shaped frame 33 and the bottom wall of the denitration cylinder 1 are detachably mounted.

[0032] The output shaft of the motor 14 drives the rotating rod 13 to rotate, and at the same time drives the brush plate 11 to rotate. The rotation of the brush plate 11 will clean up the flue gas impurities filtered on the left wall of the filter 3, thereby playing a cleaning role. It can avoid the situation where the filter 3 is blocked due to the long-term passage of flue gas, and can effectively improve the efficiency of flue gas denitrification treatment. The impurities on the filter 3 cleaned by the brush plate 11 will fall down to the inner cavity of the U-shaped frame 33 for collection. Through the setting of the inclined surface of the inclined plate 32, when the impurities fall on the inclined plate 32, they will also be blown to the right by the flue gas. The U-shaped frame 33 can be detachably installed on the denitrification cylinder 1. When the denitrification treatment of the flue gas is stopped, the U-shaped frame 33 can be removed to clean the flue gas impurities inside.

[0033] like Figure 3 , Figure 6 and Figure 8 As shown, connecting plates 18 are evenly arranged between the filter screen 3 and the round frame 4 , and each group of connecting plates 18 is fixedly mounted on the outer wall of the rotating rod 13 .

[0034] Impregnated activated carbon is evenly arranged on the circular plate 12, and each group of telescopic springs 29 is in a compressed state in the initial state.

[0035] The output shaft of the motor 14 drives the rotating rod 13 to rotate, and at the same time drives each group of connecting plates 18 to rotate. When the flue gas is filtered by the filter 3, it will flow to the right and pass through the connecting plate 18. At this time, the rotating rod 13 drives the connecting plate 18 to rotate to break up the filtered flue gas and slow down the flue gas, so as to pre-treat the flue gas and further slow down the speed at which the flue gas enters the inner cavity of the circular frame 4, thereby effectively improving the denitrification effect. The impregnated activated carbon is arranged on the circular plate 12, and the activated carbon impregnated with an acid solution (such as sulfuric acid) or other chemical substances is used to adsorb ammonia and remove its residue. When the treated flue gas flows out to the right through the circular tube 19, it will pass through the activated carbon on the circular plate 12. The activated carbon will remove the residual ammonia in the treated flue gas, so as to avoid the residual ammonia being discharged into the air and polluting the environment.

[0036] Working principle: First, connect the flue gas pipe of the biomass boiler to the smoke inlet pipe 2, and the smoke will be discharged into the denitrification tube 1 through the smoke inlet pipe 2. Turn on the air pump 16 and the motor 14. The air pump 16 will extract the ammonia in the ammonia box 15 through the extraction pipe 17 and discharge it into the inner cavity of each group of circular openings 6. The motor 14 will drive each group of retarder 5 to rotate through the rotating rod 13, so that the ammonia in the circular opening 6 can be evenly dispersed in the inner cavity of the circular frame 4. The smoke entering the denitrification tube 1 will be filtered through the filter 3, and the filtered smoke impurities will be cleaned by the brush plate 11 and fall into the U-shaped frame 33. The filtered smoke will be dispersed for the first time through the connecting plate 18, and then the smoke will enter the inner cavity of the circular frame 4. The flow rate of the smoke will be reduced again by the retarder 5, so that the smoke and ammonia After being fully mixed and denitrated, the flue gas after denitration will form harmless nitrogen and water vapor and enter the circular tube 19. Through the cooperation of the large gear 21 and the small gear 23, the rotating rod 13 will drive the fan blades 22 to rotate quickly to slow down the flow of water vapor in the inner cavity of the circular tube 19, so that the water vapor and the circulation pipe 20 are fully in contact with heat exchange. At the same time, the rotating rod 13 drives the vertical plate 26 to rotate. Through the cooperation of the ball 30 and the semicircular groove 31, and under the action of the telescopic spring 29, the air pump 16 will be impacted and the circulation pipe 20 will be vibrated, and the condensed water droplets on the circulation pipe 20 can be shaken off into the leakage groove 24 and discharged through the drain pipe 25. The final flue gas will be discharged through the activated carbon adsorption on the circular plate 12 to prevent the residual ammonia in the flue gas from being discharged into the air.

[0037] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A biomass boiler flue gas denitrification device, comprising a denitrification cylinder (1), a smoke inlet pipe (2) being fixedly mounted on one side of the denitrification cylinder (1), and a filter screen (3) being fixedly mounted on one side of the inner cavity of the denitrification cylinder (1) close to the smoke inlet pipe (2). Features: Also includes: A mixing assembly, the mixing assembly comprising a circular frame (4) rotatably mounted in the inner cavity of the denitrification cylinder (1), the circular frame (4) being evenly fixedly mounted with a retarding plate (5), each group of the retarding plates (5) being evenly provided with a circular opening (6), the outer side of each group of the circular opening (6) being provided with a circular ring hole (9), each group of the circular ring holes (9) being provided in adjacent retarding plates (5), each group of the circular openings (6) being evenly provided with an exhaust hole (10), and each group of The exhaust holes (10) are all connected to the inner cavities of the adjacent annular holes (9); each group of the deceleration plates (5) is provided with an air inlet hole (8); each group of the annular holes (9) is connected to the adjacent air inlet holes (8); an annular cavity (7) is provided on the top of the circular frame (4); each group of the air inlet holes (8) is connected to the inner cavity of the annular cavity (7); and a driving component is provided on the side of the inner cavity of the denitrification cylinder (1) away from the smoke inlet pipe (2).

2. A biomass boiler flue gas denitrification equipment according to claim 1, characterized in that: The driving assembly comprises a circular plate (12) fixedly mounted on the inner wall of the denitrification cylinder (1), a rotating rod (13) is rotatably mounted between the filter screen (3) and the circular plate (12), the side of each group of the deceleration plates (5) away from the circular frame (4) is fixedly mounted on the outer wall of the rotating rod (13), a motor (14) is fixedly mounted on one side of the circular plate (12), the output shaft of the motor (14) is fixedly mounted on one end of the rotating rod (13), an ammonia tank (15) is fixedly mounted on one side of the top of the denitrification cylinder (1), an extraction pipe (17) is fixedly mounted on one side of the ammonia tank (15), the other end of the extraction pipe (17) passes through the denitrification cylinder (1) and is connected to the inner cavity of the annular cavity (7), and an air pump (16) is fixedly mounted on the extraction pipe (17).

3. A biomass boiler flue gas denitrification equipment according to claim 2, characterized in that: A circular tube (19) is arranged on one side of the circular frame (4) away from the filter screen (3); the circular tube (19) is fixedly mounted in the inner cavity of the denitration cylinder (1); a circulation tube (20) is arranged in the circular tube (19); the circulation tube (20) is fixedly mounted on the circular tube (19) and the denitration cylinder (1); a drain groove (24) is provided on the bottom wall of the inner cavity of the circular tube (19); a drainage pipe (25) is fixedly mounted on the bottom wall of the inner cavity of the drain groove (24); the other end of the drainage pipe (25) passes through the circular tube (19) and the denitration cylinder (1), and extends to the bottom of the denitration cylinder (1).

4. A biomass boiler flue gas denitrification equipment according to claim 3, characterized in that: A large gear (21) is provided on one side of the circular tube (19) close to the circular plate (12), and the large gear (21) is fixedly mounted on the rotating rod (13). Two groups of blades (22) are provided on one side of the large gear (21) close to the circulation tube (20), and both groups of blades (22) are rotatably mounted on the inner wall of the circular tube (19). A small gear (23) is fixedly mounted on one end of the two groups of blades (22) away from the circulation tube (20), and both groups of small gears (23) are meshedly mounted on the large gear (21).

5. A biomass boiler flue gas denitrification device according to claim 4, characterized in that: Vertical plates (26) are evenly arranged on the side of the inner cavity of the circular tube (19) away from the fan blades (22); each group of the vertical plates (26) is fixedly mounted on the outer wall of the rotating rod (13); each group of the vertical plates (26) is provided with a groove (27) on the side away from the rotating rod (13); a fixed block (28) is slidably mounted on the inner cavity of each group of the grooves (27); a telescopic spring (29) is fixedly mounted between each group of the fixed blocks (28) and the inner cavity wall of the adjacent groove (27); a ball (30) is rotatably mounted on the side of each group of the fixed blocks (28) away from the vertical plates (26); and a semicircular groove (31) adapted to the ball (30) is provided on the inner cavity wall of the circular tube (19).

6. The biomass boiler flue gas denitrification equipment according to claim 2, characterized in that: A brush plate (11) is fixedly mounted on one end of the rotating rod (13) away from the motor (14), and the brush plate (11) is arranged in contact with one side of the filter screen (3).

7. A biomass boiler flue gas denitrification device according to claim 6, characterized in that: A slanted plate (32) is provided on a side of the brush plate (11) away from the filter screen (3), and the slanted plate (32) is fixedly mounted on the bottom wall of the inner cavity of the denitrification cylinder (1).

8. The biomass boiler flue gas denitrification equipment according to claim 7, characterized in that: A U-shaped frame (33) is provided below the inclined plate (32), and the U-shaped frame (33) is detachably mounted on the bottom wall of the denitration cylinder (1).

9. The biomass boiler flue gas denitrification equipment according to claim 2, characterized in that: Connecting plates (18) are evenly arranged between the filter screen (3) and the circular frame (4), and each group of the connecting plates (18) is fixedly mounted on the outer wall of the rotating rod (13).

10. The biomass boiler flue gas denitrification equipment according to claim 5, characterized in that: Impregnated activated carbon is evenly arranged on the circular plate (12), and each group of telescopic springs (29) is in a compressed state in its initial state.

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